JP6207358B2 - Fuel supply device - Google Patents

Description

  The present invention relates to a fuel supply device that is held in an opening of a fuel tank that stores fuel for a vehicle and that sends the fuel in the fuel tank to the outside of the fuel tank.

  As conventional fuel supply devices, there are those shown in FIGS. 34 to 40, and FIG. 34 is a plan view showing an impeller portion in the conventional fuel supply device. FIG. 35 is a plan view showing a fuel discharge port portion in a conventional fuel supply apparatus. FIG. 36 is a schematic diagram showing a state of an impeller portion and a fuel discharge port portion in a conventional fuel supply apparatus. FIG. 37 is a schematic diagram showing a state of an impeller portion and a fuel discharge port portion in a conventional fuel supply apparatus. FIG. 38 is a schematic diagram showing a state of an impeller portion and a fuel discharge port portion in a conventional fuel supply apparatus. FIG. 39 is a characteristic diagram showing pulsation in a conventional charge supply device. FIG. 40 is a characteristic diagram showing blade order noise in a conventional fuel supply apparatus.

  The impeller 24 provided with a plurality of impeller blades 24a is fixed to the rotary shaft 21 and rotates in the R direction. The fuel sucked into the pump chamber from the fuel suction port of the pump base 13 through the suction filter from the fuel tank is pressurized in the pump chamber by the impeller 24 that rotates together with the rotating shaft 21, and from the fuel discharge port 31 of the pump base 13 to the motor chamber. Is sent out.

  The impeller blade 24a of the impeller 24 and the fuel discharge port 31 of the pump base 13 are schematically shown in FIGS. 36 to 38. The AB surface between the inner peripheral side A of the impeller blade 24a and the outer peripheral side B of the impeller blade 24a is In addition to being straight, the CD surface of the inner peripheral side C of the fuel discharge port 31 and the outer peripheral side D of the fuel discharge port 31 is the same linear shape as the AB surface of the impeller blade 24a, and the CD surface of the fuel discharge port 31 is As shown in FIG. 37, the AB surface of the inner peripheral side A of the impeller blade 24a and the outer peripheral side B of the impeller blade 24a, the inner peripheral side C of the fuel discharge port 31, and the fuel discharge The CD surface with the outer peripheral side D of the outlet 31 is the same straight surface and is on the same line as the radial line S.

  FIG. 36 shows a state before the impeller blade 24a of the impeller 24 rotates in the R direction and the AB surface of the impeller blade 24a overlaps the CD surface of the fuel discharge port 31 of the pump base 13, and FIG. The impeller blade 24a further rotates in the direction and the AB surface of the impeller blade 24a overlaps the CD surface of the fuel discharge port 31 of the pump base 13. FIG. 38 shows the impeller blade 24a further rotated in the R direction and the AB surface of the impeller blade 24a. The surface is further advanced from the CD surface on the fuel discharge port 31 side of the pump base 13. Thus, the fuel pressurized in the pump chamber by the rotation of the impeller blades 24a of the impeller 24 is sent from the fuel discharge port 31 of the pump base 13 to the motor chamber.

JP 2007-132196 A JP 2007-270681 A

In the conventional fuel supply apparatus described above, the AB surface of the inner peripheral side A of the impeller blades 24a of the impeller 24 and the outer peripheral side B of the impeller blades 24a is linear, and the inner side of the fuel discharge port 31 of the pump base 13 The CD surface of the peripheral side C and the outer peripheral side D of the fuel discharge port 31 is the same straight line as the AB surface of the impeller blade 24a, and the CD surface of the fuel discharge port 31 is collinear with the radial line S. FIG. As shown in FIG. 2, the AB surface of the inner peripheral side A of the impeller blade 24a and the outer peripheral side B of the impeller blade 24a, the inner peripheral side C of the fuel discharge port 31, and the CD surface of the outer peripheral side D of the fuel discharge port 31 are the same. The straight line plane is configured to be collinear with the radial line S, and the AB surface of the impeller blades 24a and the CD surface of the fuel discharge port 31 have no angle with respect to the radial line S. . In this state, the entire AB surface of the impeller blade 24a overlaps the entire CD surface of the fuel discharge port 31, so that fuel pressurized in the pump chamber is transferred from the fuel discharge port 31 of the pump base 13 to the motor chamber. As shown in FIG. 39, when the fuel is sent out, the fuel pressure pulsation width M1 becomes large. As shown in FIG. 40, the blade order sound H1 becomes large, which causes noise. It was.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to reduce the fuel pressure pulsation width of the fuel when the impeller blades 24a of the impeller 24 are delivered from the fuel discharge port 31 of the pump base 13. In addition, the blade order sound is also suppressed to a low level, thereby significantly reducing noise and providing a highly reliable fuel supply device.

A fuel supply device according to the present invention includes a fuel pump attached to a fuel tank and sucking fuel in the fuel tank from a fuel suction port and delivering the fuel from a fuel discharge port. The fuel pump includes the fuel suction port and the fuel pump. A pump base having a fuel discharge port, and a plurality of impeller blades arranged along the rotation direction so as to pressurize the fuel sucked from the fuel suction port of the pump base by rotation and send it out from the fuel discharge port is constituted by an impeller which have a, in the above surface of the top side in the rotational direction of the impeller vanes, before Symbol fuel discharge port and the first intersection point to a, before Symbol fuel discharge port and the last intersection points to B, you in the plane of the front side relative to the rotation of the yo beauty before Symbol fuel discharge port, the point of intersection with the impeller blades and the first C, and the intersection point to the impeller vanes and the last D, Further, when the rotation center of the impeller is O, the relationship between the angle θ1 formed by OA-OB and the angle θ2 formed by OC-OD is “θ1 + θ2 = 360 ° / number of blades”.

  According to the fuel supply device of the present invention, the noise is remarkably reduced by suppressing the fuel pressure pulsation width when the fuel is delivered from the fuel discharge port of the pump base by the impeller blades of the impeller, and also suppressing the blade order noise. Thus, a highly reliable fuel supply device can be obtained.

It is a side view which shows the fuel supply apparatus concerning Embodiment 1 of this invention. It is a sectional side view which shows the fuel supply apparatus concerning Embodiment 1 of this invention. It is sectional drawing which shows the fuel pump in the fuel supply apparatus concerning Embodiment 1 of this invention. It is a top view which shows the impeller part in the fuel supply apparatus concerning Embodiment 1 of this invention. It is a top view which shows the fuel discharge port part in the fuel supply apparatus concerning Embodiment 1 of this invention. It is a schematic diagram which shows the state of the impeller part and fuel discharge port part in the fuel supply apparatus concerning Embodiment 1 of this invention. It is a schematic diagram which shows the state of the impeller part and fuel discharge port part in the fuel supply apparatus concerning Embodiment 1 of this invention. It is a schematic diagram which shows the state of the impeller part and fuel discharge port part in the fuel supply apparatus concerning Embodiment 1 of this invention. It is a schematic diagram which shows the state of the impeller part and fuel discharge port part in the fuel supply apparatus concerning Embodiment 1 of this invention. It is a schematic diagram which shows the state of the impeller part and fuel discharge port part in the fuel supply apparatus concerning Embodiment 1 of this invention. It is a characteristic view which shows the pulsation in the fuel supply apparatus concerning Embodiment 1 of this invention. It is a characteristic view which shows the blade order sound in the fuel supply apparatus concerning Embodiment 1 of this invention. It is a top view which shows the impeller part in the fuel supply apparatus concerning Embodiment 2 of this invention. It is a top view which shows the fuel discharge part in the fuel supply apparatus concerning Embodiment 2 of this invention. It is a schematic diagram which shows the state of the impeller part and fuel discharge port part in the fuel supply apparatus concerning Embodiment 2 of this invention. It is a schematic diagram which shows the state of the impeller part and fuel discharge port part in the fuel supply apparatus concerning Embodiment 2 of this invention. It is a schematic diagram which shows the state of the impeller part and fuel discharge port part in the fuel supply apparatus concerning Embodiment 2 of this invention. It is a schematic diagram which shows the state of the impeller part and fuel discharge port part in the fuel supply apparatus concerning Embodiment 2 of this invention. It is a schematic diagram which shows the state of the impeller part and fuel discharge port part in the fuel supply apparatus concerning Embodiment 2 of this invention. It is a top view which shows the impeller part in the fuel supply apparatus concerning Embodiment 3 of this invention. It is a top view which shows the fuel discharge port part in the fuel supply apparatus concerning Embodiment 3 of this invention. It is a schematic diagram which shows the state of the impeller part and fuel discharge port part in the fuel supply apparatus concerning Embodiment 3 of this invention. It is a schematic diagram which shows the state of the impeller part and fuel discharge port part in the fuel supply apparatus concerning Embodiment 3 of this invention. It is a schematic diagram which shows the state of the impeller part and fuel discharge port part in the fuel supply apparatus concerning Embodiment 3 of this invention. It is a schematic diagram which shows the state of the impeller part and fuel discharge port part in the fuel supply apparatus concerning Embodiment 3 of this invention. It is a schematic diagram which shows the state of the impeller part and fuel discharge port part in the fuel supply apparatus concerning Embodiment 3 of this invention. It is a top view which shows the impeller part in the fuel supply apparatus concerning Embodiment 5 of this invention. It is a top view which shows the fuel discharge part in the fuel supply apparatus concerning Embodiment 5 of this invention. It is a schematic diagram which shows the state of the impeller part and fuel discharge port part in the fuel supply apparatus concerning Embodiment 5 of this invention. It is a schematic diagram which shows the state of the impeller part and fuel discharge port part in the fuel supply apparatus concerning Embodiment 5 of this invention. It is a schematic diagram which shows the state of the impeller part and fuel discharge port part in the fuel supply apparatus concerning Embodiment 5 of this invention. It is a schematic diagram which shows the state of the impeller part and fuel discharge port part in the fuel supply apparatus concerning Embodiment 5 of this invention. It is a schematic diagram which shows the state of the impeller part and fuel discharge port part in the fuel supply apparatus concerning Embodiment 5 of this invention. It is a top view which shows the impeller part in the conventional fuel supply apparatus. It is a top view which shows the fuel discharge outlet part in the conventional fuel supply apparatus. It is a schematic diagram which shows the state of the impeller part and fuel discharge port part in the conventional fuel supply apparatus. It is a schematic diagram which shows the state of the impeller part and fuel discharge port part in the conventional fuel supply apparatus. It is a schematic diagram which shows the state of the impeller part and fuel discharge port part in the conventional fuel supply apparatus. It is a characteristic view which shows the pulsation in the conventional charge supply apparatus. It is a characteristic view which shows the blade order sound in the conventional fuel supply apparatus.

Embodiment 1 FIG.
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 12. In the drawings, the same or equivalent members and parts will be described with the same reference numerals. 1 is a side view showing a fuel supply apparatus according to Embodiment 1 of the present invention. FIG. 2 is a side sectional view showing the fuel supply apparatus according to Embodiment 1 of the present invention. FIG. 3 is a cross-sectional view showing a fuel pump in the fuel supply apparatus according to Embodiment 1 of the present invention. FIG. 4 is a plan view showing an impeller portion in the fuel supply apparatus according to Embodiment 1 of the present invention. FIG. 5 is a plan view showing a fuel discharge port portion in the fuel supply apparatus according to Embodiment 1 of the present invention. FIG. 6 is a schematic diagram showing a state of the impeller portion and the fuel discharge port portion in the fuel supply apparatus according to Embodiment 1 of the present invention. FIG. 7 is a schematic diagram showing a state of the impeller portion and the fuel discharge port portion in the fuel supply apparatus according to Embodiment 1 of the present invention. FIG. 8 is a schematic diagram showing a state of the impeller portion and the fuel discharge port portion in the fuel supply apparatus according to Embodiment 1 of the present invention. FIG. 9 is a schematic diagram showing a state of the impeller portion and the fuel discharge port portion in the fuel supply apparatus according to Embodiment 1 of the present invention. FIG. 10 is a schematic diagram showing the state of the impeller portion and the fuel discharge port portion in the fuel supply apparatus according to Embodiment 1 of the present invention. FIG. 11 is a characteristic diagram showing pulsation in the fuel supply apparatus according to Embodiment 1 of the present invention. FIG. 12 is a characteristic diagram showing blade order sound in the fuel supply apparatus according to Embodiment 1 of the present invention.

  In each of these drawings, the lid member 10 of the fuel supply device 100 is formed of a molded product made of a thermoplastic resin and formed in a disk shape, for example, and covers the opening 2 formed in the fuel tank 1. In this way, it is attached to the upper wall of the fuel tank 1. Parts other than the lid member 10 of the fuel supply device 100 are accommodated in the fuel tank 1.

  The lid member 10 is provided with a discharge pipe 12 that is a pipe that supplies fuel discharged from the fuel pump 18 to the outside of the fuel tank 1, and an electrical connector 33 that supplies power to the fuel pump 18. A lead wire 14 is connected to the fuel pump 18, and electric power input from the power source via the electrical connector 33 is supplied to the fuel pump 18 via the lead wire 14.

  For example, one end of the lid member 10 is fitted to a fitting member (not shown) of the holding member 11 formed integrally with the lid member 10, and the other end engages with the sub tank 15. Is provided with a support member (not shown).

  A spring 17 as an urging member is fitted in a support member (not shown), and the lid member 10 and the sub tank 15 are urged away from each other by the spring 17. The member 10 and the sub tank 15 can reciprocate in the axial direction of the lid member 10, that is, in the up and down direction in FIG.

Therefore, even if the resin fuel tank 1 in which the fuel supply device 100 is accommodated expands or contracts due to a change in internal pressure or a change in the amount of fuel due to a temperature change, the sub tank bottom 15a of the sub tank 15 is fueled by the biasing force of the spring 17. The tank 1 is always pressed against the inner wall of the fuel tank bottom 1a.

  The fuel in the fuel tank 1 is sucked into the sub tank 15, the fuel pump 18 that sucks and discharges the fuel in the sub tank 15, the suction filter 19 that filters the fuel sucked by the fuel pump 18, and the fuel that the fuel pump 18 discharges A discharge filter 20 for filtering the water is accommodated.

  The fuel pump 18 is accommodated vertically in the sub tank 15 with the fuel suction side in the lower side in FIG. 2, and accommodates a motor unit (not shown) inside, and a sub tank by an impeller (not shown) that rotates together with the motor. The fuel in 15 is sucked and pressurized.

  The fuel pressurized by the fuel pump 18 is discharged to the pressure regulator 34 after the foreign matter is removed by the discharge filter 20. The fuel discharged to the pressure regulator 34 is adjusted to a predetermined pressure and supplied to the discharge pipe 12 via the bellows tube 22. The fuel in the fuel tank 1 is supplied from the discharge pipe 12 to the outside of the fuel tank 1.

  The suction filter 19 is connected to the fuel suction port of the fuel pump 18 and removes relatively large foreign matters contained in the fuel sucked from the sub tank 15 by the fuel pump 18.

  The jet pump 23 that supplies fuel into the sub tank 15 is attached to the outside of the sub tank 15 and is caused by suction pressure generated by ejecting excess fuel discharged from the pressure regulator 34 toward a suction port (not shown). The fuel in the fuel tank 1 is supplied into the sub tank 15. Thereby, even if the amount of fuel in the fuel tank 1 decreases, the sub tank 15 is filled with fuel.

  A sender gauge 35 is disposed on the outer peripheral surface of the sub tank 15, and the sender gauge 35 has a sensor portion 25, an arm 26, and a float 27 attached to the tip of the arm 26.

  The float 27 can float in the fuel in the fuel tank 1, and the arm 26 rotates around the end on the sensor unit 25 side. A plurality of conductive patterns having different resistance values are formed on the sensor unit 25, and the end of the arm 26 on the non-float side can contact the conductive pattern of the sensor unit 25.

  When the float 27 floating in the fuel in the fuel tank 1 floats and sinks according to the remaining amount of fuel, the arm 26 rotates as the float 27 floats and sinks. Thereby, the contact state between the arm 26 and the conductive pattern of the sensor unit 25 changes, and the remaining amount of fuel in the fuel tank 1 is detected. The detected remaining amount of fuel is output as an electrical signal to an ECU (electronic control unit) (not shown) via a lead wire (not shown) and an electrical connector 33.

  Next, the fuel pump 18 is configured as shown in FIG. 3, for example. The fuel pump 18 sucks fuel from the fuel tank 1 and pressurizes it, a motor unit 18b that drives the pump unit 18a, and discharges fuel pressurized by the pump unit 18a to the outside of the fuel tank 1. And a fuel discharge portion 18c.

  The pump portion 18 a forms a C-shaped pump chamber 300 between the pump cover 120 and the pump base 130, and an impeller 240 as a rotating member for fuel pressurization formed in a disk shape is provided in the pump chamber 300. It is housed in a rotatable manner. The pump cover 120 and the pump base 130 are made of aluminum, and are fixed by caulking to one end of a housing 110 formed in a cylindrical shape. The fuel discharge portion 18 c is connected to the discharge pipe 12 via the bellows tube 22.

  The impeller 240 is provided with a plurality of impeller blades 241 near the outer periphery. The fuel sucked into the pump chamber 300 from the fuel suction port 310 formed in the pump cover 120 is pressurized by the rotation of the impeller 240 and sent out from the fuel discharge port 311 to the motor chamber 320 of the motor unit 18b. A partition wall formed on the pump base 130 is close to the outer periphery of the impeller 240 and seals the fuel inlet 310 and the fuel outlet 311.

  The motor unit 18b includes a rotor 200 and a magnet 250 surrounding the rotor 200, and current is supplied from the connector pin 510 of the connector 500 to the coil 201 of the rotor 200 disposed in the magnetic field of the magnet 250. Then, the rotor 200 rotates. The rotating shaft 210 on the thrust direction side of the rotor 200 is supported by a thrust bearing 220 that is press-fitted into the central recess of the pump cover 120. The rotating shaft 210 is supported by the thrust bearing 220 in the axial direction and is supported by the bearing 260 in the radial direction. The other rotating shaft 230 of the rotor 200 is supported by the bearing 270 in the radial direction. A notch 210a is provided in the axial direction on the outer peripheral wall of the rotating shaft 210, and the impeller 240 is fixed to a portion where the notch 210a is formed.

  The magnet 250 is provided on the outer periphery of the rotor 200 and forms a predetermined air gap with the rotor 200. A copper commutator 400 divided into eight segments is installed on the rotating shaft 230 side of the rotor 200. The discharge case 140 is fixed by caulking to the other end of the housing 110. The connector pin 510 is embedded in the connector 500 provided in the discharge case 140 with its tip exposed. Connector 500 is connected to lead wire 14. The connector pin 510 is connected to the coil 201 wound around the rotor 200 via the brush and commutator 400 and is also connected to the choke coil 520. The choke coil 520 is connected to remove an alternating current component from the current supplied to the coil 201.

  The fuel discharge unit 18 c accommodates a check valve 340 in a discharge port 330 formed in the discharge case 140, and the check valve 340 prevents a back flow of fuel discharged from the discharge port 330.

  Next, the operation of the fuel pump 18 will be described. When a current is supplied to the coil 201, the rotor 200 rotates with the rotation shaft 210 supported by the thrust bearing 220 and the bearing 260 and the rotation shaft 230 supported by the bearing 270. The fuel sucked into the pump chamber 300 from the fuel tank 1 through the suction filter 19 is pressurized in the pump chamber 300 by the impeller 240 that rotates together with the rotating shaft 210, and is sent out from the fuel discharge port 311 to the motor chamber 320. The fuel delivered to the motor chamber 320 pushes up the check valve 340 of the discharge port 330 and is discharged from the discharge pipe 12 to the outside of the fuel tank 1 through the bellows tube 22 from the discharge port 340.

  Incidentally, the configuration of the impeller blade 241 portion of the impeller 240 is as shown in FIG. 4 as one embodiment, and the configuration of the fuel discharge port 311 is as shown in FIG. 5 as one embodiment. Yes.

  The feature of the present invention is that on the impeller blade 241, the point that first intersects with the fuel discharge port 311 of the pump base 130 is A, the point that intersects the fuel discharge port 311 of the pump base 130 last is B, and the pump base In 130 fuel discharge ports 311, if the point where the impeller blade 241 first intersects is C, the point where the impeller blade 241 intersects last is D, and the rotation center of the impeller 240 is O, then the angle θ1 formed by OA-OB is The relationship of the angle θ2 formed by the OC-OD is represented by “θ1 + θ2 = 360 ° / number of blades”. Because of the relationship of this equation, the fuel pressure pulsation width when the fuel is delivered to the fuel discharge port 311 by the impeller blades 241 of the impeller 240 can be suppressed to a small level, and the blade order noise can be suppressed to a low level, so that the noise is significantly reduced. Thus, a highly reliable fuel supply device is obtained.

  In the first embodiment, on the impeller blade 241, the point that first intersects with the fuel discharge port 311 of the pump base 130 is A, the point that finally intersects with the fuel discharge port 311 of the pump base 130, and the pump base 130. In the fuel discharge port 311, if the point where the impeller blade 241 first intersects is C, the point where the impeller blade 241 intersects last is D, and the rotation center of the impeller 240 is O, then the angle θ1 formed by OA-OB and the OC The relation of the angle θ2 formed by −OD is “θ1 + θ2 = 360 ° / number of blades”, and the angle θ2 is 0, and θ1 + θ2 = 360 ° / number of blades.

  That is, for example, when the number of blades is 30, θ1 + θ2 = 360 ° / 30 and θ1 + θ2 = 12 °. In the first embodiment, as shown in FIG. 6, since the angle θ2 is 0, the angle θ1 is 12 °. Since the angle θ2 from the inner peripheral side to the outer peripheral side of the CD surface of the inner peripheral side C and the outer peripheral side D of the fuel discharge port 311 of the pump base 130 is 0, the CD surface of the fuel discharge port 31 is in the radial direction. It is on the same line as line S.

  Thus, by setting the angle θ1 of the AB surface of the impeller blade 241 of the impeller 240 and the angle θ2 of the CD surface between the inner peripheral side C and the outer peripheral side D of the fuel discharge port 311 of the pump base 130, the impeller The fuel pressure pulsation width when the fuel is delivered to the fuel discharge port 311 by the 240 impeller blades 241 can be reduced, and the blade order noise can be reduced.

  6 shows a state before the impeller blade 241 of the impeller 240 rotates in the R direction and the AB surface of the impeller blade 241 overlaps the CD surface of the fuel discharge port 311 of the pump base 130. FIG. The impeller blade 241 further rotates in the direction and the inner peripheral side A of the impeller blade 241 overlaps the CD surface of the fuel discharge port 311 of the pump base 130. FIG. 8 shows the impeller blade 241 further rotated in the R direction. 9 shows a state in which the AB surface of the pump base 130 crosses the CD surface of the fuel discharge port 311 of the pump base 130. FIG. 9 shows that the impeller blade 241 further rotates in the R direction and the outer peripheral side B of the impeller blade 241 FIG. 10 shows a state in which the impeller blade 241 further rotates in the R direction so that the AB surface of the impeller blade 241 is in the direction of the PO. It shows a more advanced state from a CD surface of the fuel discharge port 311 side of the Pubesu 130. As described above, the fuel pressurized in the pump chamber 300 by the rotation of the impeller blades 241 of the impeller 240 is sent from the fuel discharge port 311 of the pump base 130 to the motor chamber 320.

  As described above, on the impeller blade 241, the point that first intersects with the fuel discharge port 311 of the pump base 130 is A, the point that finally intersects with the fuel discharge port 311 of the pump base 130, and the fuel discharge of the pump base 130. In the outlet 311, when the point where the impeller blade 241 first intersects is C, the point where the impeller blade 241 finally intersects is D, and the rotation center of the impeller 240 is O, the angle θ1 and OC-OD formed by OA-OB are Since the relationship of the angle θ2 formed is “θ1 + θ2 = 360 ° / number of blades”, the inner peripheral side A of the impeller blade 241 overlaps the CD surface of the fuel discharge port 311 of the pump base 130, and the AB surface of the impeller blade 241 is Crossing the CD surface of the fuel discharge port 311 of the pump base 130, the outer peripheral side B of the impeller blade 241 is the pump base 130. Since the AB surface of the impeller blade 241 is further advanced from the CD surface of the pump base 130 on the fuel discharge port 311 side, the fuel pressurized in the pump chamber 300 is overlapped with the CD surface of the fuel discharge port 311. 11 is sent from the fuel discharge port 311 of the pump base 130 to the motor chamber 320, as shown in FIG. 11, the fuel fuel pressure pulsation width M2 can be suppressed to be smaller than the fuel pressure pulsation width M1 of the conventional device described above. As shown in FIG. 12, since the blade order sound H2 can also be suppressed to be smaller than the blade order sound H1 of the above-described conventional device, it is possible to significantly reduce noise and obtain a highly reliable fuel supply device.

Embodiment 2. FIG.
A second embodiment of the present invention will be described with reference to FIGS. 13 to 19. In these drawings, the same or equivalent members and parts will be described with the same reference numerals. FIG. 13 is a plan view showing an impeller portion in a fuel supply apparatus according to Embodiment 2 of the present invention. FIG. 14 is a plan view showing a fuel discharge port portion in the fuel supply apparatus according to Embodiment 2 of the present invention. FIG. 15 is a schematic diagram showing a state of an impeller portion and a fuel discharge port portion in a fuel supply device according to Embodiment 2 of the present invention. FIG. 16 is a schematic diagram showing a state of the impeller portion and the fuel discharge port portion in the fuel supply apparatus according to Embodiment 2 of the present invention. FIG. 17 is a schematic diagram showing a state of the impeller portion and the fuel discharge port portion in the fuel supply apparatus according to Embodiment 2 of the present invention. FIG. 18 is a schematic diagram showing a state of the impeller portion and the fuel discharge port portion in the fuel supply apparatus according to Embodiment 2 of the present invention. FIG. 19 is a schematic diagram showing the state of the impeller portion and the fuel discharge port portion in the fuel supply apparatus according to Embodiment 2 of the present invention.

  In the first embodiment described above, on the impeller blade 241, the point that first intersects with the fuel discharge port 311 of the pump base 130 is A, the point that intersects the fuel discharge port 311 of the pump base 130 last is B, and the pump base In 130 fuel discharge ports 311, if the point where the impeller blade 241 first intersects is C, the point where the impeller blade 241 intersects last is D, and the rotation center of the impeller 240 is O, then the angle θ1 formed by OA-OB is Although the case where the relationship of the angle θ2 formed by the OC-OD is “θ1 + θ2 = 360 ° / number of blades” has been described, in the second embodiment, the fuel discharge port 312 of the pump base 130 and the fuel discharge port 312 on the impeller blade 242 The point that intersects first is A, the point that intersects the fuel outlet 312 of the pump base 130 last is B, and the pump base 1 In the 30 fuel discharge ports 312, when the point where the impeller blade 242 first intersects is C, the point where the impeller blade 242 intersects last is D, and the rotation center of the impeller 240 is O, the angle θ1 formed by OA-OB is The relationship of the angle θ2 formed by the OC-OD is “θ1 + θ2 = 360 ° / number of blades”, the angle θ1 is 0, and θ1 + θ2 = 360 ° / number of blades is shown.

  That is, for example, when the number of blades is 30, θ1 + θ2 = 360 ° / 30 and θ1 + θ2 = 12 °. In the second embodiment, as shown in FIG. 15, since the angle θ1 is 0, the angle θ2 is 12 °. Since the angle θ1 from the inner peripheral side to the outer peripheral side of the AB surface of the inner peripheral side A and the outer peripheral side B of the impeller blade 242 of the impeller 240 is 0, the AB surface of the impeller blade 242 of the impeller 240 is radial. It is on the same line as the line S.

  Thus, by setting the angle θ1 of the AB surface of the impeller blade 242 of the impeller 240 and the angle θ2 of the CD surface between the inner peripheral side C and the outer peripheral side D of the fuel discharge port 312 of the pump base 130, the impeller is set. The fuel pressure pulsation width of the fuel when being sent to the fuel discharge port 312 by the 240 impeller blades 242 can be reduced, and the blade order noise can be reduced.

  FIG. 15 shows a state before the impeller blade 242 of the impeller 240 rotates in the R direction and the AB surface of the impeller blade 242 overlaps the CD surface of the fuel discharge port 312 of the pump base 130. FIG. 17 shows a state where the inner peripheral side A of the impeller blade 242 overlaps with the CD surface of the fuel discharge port 312 of the pump base 130, and FIG. 17 shows the impeller blade 242 further rotated in the R direction. 18 shows a state in which the AB surface of the pump base 130 crosses the CD surface of the fuel discharge port 312 of the pump base 130. FIG. 18 shows that the impeller blade 242 further rotates in the R direction and the outer peripheral side B of the impeller blade 242 FIG. 19 shows a state in which the impeller blade 242 further rotates in the R direction as the impeller blade 242 overlaps the CD surface of the outlet 312. Surface indicates a more advanced state from a CD surface of the fuel discharge port 312 side of the pump base 130. Thus, the fuel pressurized in the pump chamber 300 by the rotation of the impeller blades 242 of the impeller 240 is sent from the fuel discharge port 312 of the pump base 130 to the motor chamber 320.

  As described above, also in the second embodiment, on the impeller blade 242, the point that first intersects with the fuel discharge port 312 of the pump base 130 is A, and the point that last intersects with the fuel discharge port 312 of the pump base 130 is B. In the fuel discharge port 312 of the pump base 130, if the point where the impeller blade 242 first intersects is C, the point where the impeller blade 242 intersects last is D, and the rotation center of the impeller 240 is O, then OA-OB is Since the relationship between the angle θ1 formed and the angle θ2 formed by the OC-OD is “θ1 + θ2 = 360 ° / number of blades”, the inner peripheral side A of the impeller blade 242 overlaps the CD surface of the fuel discharge port 312 of the pump base 130. The AB surface of the impeller blade 242 crosses the CD surface of the fuel discharge port 312 of the pump base 130, and the impeller blade 242 Since the outer peripheral side B overlaps the CD surface of the fuel discharge port 312 of the pump base 130 and the AB surface of the impeller blade 242 further advances from the CD surface of the pump base 130 on the fuel discharge port 312 side, the pump chamber 300 As shown in FIG. 11, when the pressurized fuel is sent from the fuel discharge port 312 of the pump base 130 to the motor chamber 320, the fuel fuel pressure pulsation width M2 is greater than the fuel pressure pulsation width M1 of the conventional device described above. As shown in FIG. 12, the blade order sound H2 can also be suppressed to be lower than the blade order sound H1 of the above-described conventional device, so that a highly reliable fuel supply device with significantly reduced noise can be achieved. Can be obtained.

Embodiment 3 FIG.
A third embodiment of the present invention will be described with reference to FIGS. 20 to 26. In these drawings, the same or equivalent members and parts will be described with the same reference numerals. FIG. 20 is a plan view showing an impeller portion in a fuel supply apparatus according to Embodiment 3 of the present invention. FIG. 21 is a plan view showing a fuel discharge port portion in the fuel supply apparatus according to Embodiment 3 of the present invention. FIG. 22 is a schematic diagram showing the state of the impeller portion and the fuel discharge port portion in the fuel supply apparatus according to Embodiment 3 of the present invention. FIG. 23 is a schematic diagram showing a state of the impeller portion and the fuel discharge port portion in the fuel supply apparatus according to Embodiment 3 of the present invention. FIG. 24 is a schematic diagram showing a state of the impeller portion and the fuel discharge port portion in the fuel supply apparatus according to Embodiment 3 of the present invention. FIG. 25 is a schematic diagram showing the state of the impeller portion and the fuel discharge port portion in the fuel supply apparatus according to Embodiment 3 of the present invention. FIG. 26 is a schematic diagram showing a state of the impeller portion and the fuel discharge port portion in the fuel supply apparatus according to Embodiment 3 of the present invention.

  In the first embodiment described above, on the impeller blade 241, the point that first intersects with the fuel discharge port 311 of the pump base 130 is A, the point that intersects the fuel discharge port 311 of the pump base 130 last is B, and the pump base In 130 fuel discharge ports 311, if the point where the impeller blade 241 first intersects is C, the point where the impeller blade 241 intersects last is D, and the rotation center of the impeller 240 is O, then the angle θ1 formed by OA-OB is The angle θ2 formed by the OC-OD is “θ1 + θ2 = 360 ° / the number of blades”, and the angle of the impeller blade 242 of the impeller 240 from the inner peripheral side to the outer peripheral side on the AB surface of the inner peripheral side A and the outer peripheral side B In this example, θ1 is provided, the angle θ2 is set to 0, and θ1 + θ2 = 360 ° / the number of blades. In the second embodiment described above, contrary to the first embodiment described above, on the impeller blade 242, the point that first intersects with the fuel discharge port 312 of the pump base 130 is A, and the fuel discharge port of the pump base 130. B is the last point that intersects 312, C is the first point that intersects impeller blade 242 at fuel discharge port 312 of pump base 130, D is the last point that intersects impeller blade 242, and O is the rotational center of impeller 240. In this case, the relationship between the angle θ1 formed by OA-OB and the angle θ2 formed by OC-OD is “θ1 + θ2 = 360 ° / number of blades”, the angle θ1 is set to 0, and the inner periphery of the fuel discharge port 312 of the pump base 130 An angle θ2 from the inner peripheral side to the outer peripheral side is provided on the CD surface of the side C and the outer peripheral side D, and θ1 + θ2 = 360 ° / the number of blades is shown. In the third embodiment, on the impeller blade 243, the point that first intersects with the fuel discharge port 313 of the pump base 130 is A, the point that last intersects with the fuel discharge port 313 of the pump base 130, and the pump base 130. In the fuel discharge port 313, when the point where the impeller blade 243 first intersects is C, the point where the impeller blade 243 finally intersects is D, and the rotation center of the impeller 240 is O, the angle θ1 formed by OA-OB and the OC The relationship of the angle θ2 formed by −OD is “θ1 + θ2 = 360 ° / the number of blades”.

  That is, for example, when the number of blades is 30, θ1 + θ2 = 360 ° / 30 and θ1 + θ2 = 12 °. In the first embodiment, as shown in FIG. 22, a predetermined angle θ1 from the inner peripheral side to the outer peripheral side is provided on the AB surface of the inner peripheral side A and the outer peripheral side B of the impeller blade 243 of the impeller 240, A predetermined angle θ2 from the inner peripheral side toward the outer peripheral side is provided on the CD surface of the inner peripheral side C and the outer peripheral side D of the fuel discharge port 313 of the pump base 130 in a direction opposite to the angle θ1. . As is apparent from FIG. 22, since the angle θ1 and the angle θ2 are provided so as to be opposite to each other, θ1 is 6 ° and θ2 is 6 °, and θ1 + θ2 = 6 ° + 6. The case where ° = 12 ° is shown.

  In this way, the predetermined angle θ1 of the AB surface of the impeller blade 243 of the impeller 240 and the predetermined angle θ2 of the CD surface between the inner peripheral side C and the outer peripheral side D of the fuel discharge port 313 of the pump base 130 are set. As a result, the fuel fuel pressure pulsation width when being sent to the fuel discharge port 313 by the impeller blades 243 of the impeller 240 can be reduced, and the blade order noise can be reduced.

  FIG. 22 shows a state before the impeller blades 243 of the impeller 240 rotate in the R direction and the AB surface of the impeller blades 243 overlaps the CD surface of the fuel discharge port 313 of the pump base 130. FIG. The impeller blade 243 further rotates in the direction and the inner peripheral side A of the impeller blade 243 overlaps the CD surface of the fuel discharge port 313 of the pump base 130. FIG. 24 shows the impeller blade 243 further rotated in the R direction. 25 shows a state in which the AB surface of the pump base 130 crosses the CD surface of the fuel discharge port 313 of the pump base 130. FIG. 25 shows that the impeller blade 243 further rotates in the R direction and the outer peripheral side B of the impeller blade 243 FIG. 26 shows a state where the impeller blades 243 further rotate in the R direction and overlap with the CD surface of the outlet 313. Surface indicates a more advanced state from a CD surface of the fuel discharge port 313 side of the pump base 130. As described above, the fuel pressurized in the pump chamber 300 by the rotation of the impeller blades 243 of the impeller 240 is sent from the fuel discharge port 313 of the pump base 130 to the motor chamber 320.

  As described above, on the impeller blade 243, the point that first intersects with the fuel discharge port 313 of the pump base 130 is A, the point that finally intersects with the fuel discharge port 313 of the pump base 130, and the fuel discharge of the pump base 130. In the outlet 313, when the point where the impeller blade 243 first intersects is C, the point where the impeller blade 243 finally intersects is D, and the rotation center of the impeller 240 is O, the angle θ1 and OC-OD formed by OA-OB are Since the relationship of the angle θ2 formed is “θ1 + θ2 = 360 ° / number of blades”, the inner peripheral side A of the impeller blade 243 overlaps the CD surface of the fuel discharge port 313 of the pump base 130, and the AB surface of the impeller blade 243 is Crossing the CD surface of the fuel discharge port 313 of the pump base 130, the outer peripheral side B of the impeller blades 243 is the pump base 130. Since the AB surface of the impeller blade 243 is further advanced from the CD surface on the fuel discharge port 313 side of the pump base 130, the fuel pressurized in the pump chamber 300 is overlapped with the CD surface of the fuel discharge port 313. 11, the fuel pressure pulsation width M2 of the fuel can be suppressed to be smaller than the fuel pressure pulsation width M1 of the conventional device described above, as shown in FIG. As shown in FIG. 12, since the blade order sound H2 can also be suppressed to be smaller than the blade order sound H1 of the above-described conventional device, it is possible to significantly reduce noise and obtain a highly reliable fuel supply device.

In the third embodiment described above, for example, when the number of blades is 30, θ1 + θ2 = 360 ° / 30 and θ1 + θ2 = 12 °. For example, when θ1 is 6 ° and θ2 is 6 °. However, the present invention is not limited to this, and θ1 may be 8 °, θ2 may be 4 °, θ1 + θ2 = 12 °, θ1 may be 4 °, θ2 may be 8 °, and θ1 + θ2 = 12 °. For example, when the number of blades is 30, the same effect can be obtained by appropriately setting the angles of θ1 and θ2 so that θ1 + θ2 = 12 °.
For example, although the case where the number of blades is 30 has been described, the present invention is not limited to this, and the angles of θ1 and θ2 and the number of blades are appropriately set so that θ1 + θ2 = 360 ° / the number of blades. Thus, the same effect can be obtained.

Embodiment 4 FIG.
In each of the above-described embodiments, the case where the angle θ1 and the angle θ2 are provided so as to be directed from the inner peripheral side to the outer peripheral side with respect to the radial line has been described. However, the present invention is not limited to this. In the fourth embodiment, although not shown, the angle θ1 and the angle θ2 may be provided so as to be directed from the outer peripheral side to the inner peripheral side with respect to the radial line that is the opposite direction to each of the above-described embodiments. The effects similar to those of the above-described embodiments are often obtained.

Embodiment 5. FIG.
A fifth embodiment of the present invention will be described with reference to FIGS. 27 to 33. In these drawings, the same or equivalent members and parts will be described with the same reference numerals. FIG. 27 is a plan view showing an impeller portion in a fuel supply apparatus according to Embodiment 5 of the present invention. FIG. 28 is a plan view showing a fuel discharge port portion in the fuel supply apparatus according to Embodiment 5 of the present invention. FIG. 29 is a schematic diagram showing a state of the impeller portion and the fuel discharge port portion in the fuel supply device according to Embodiment 5 of the present invention. FIG. 30 is a schematic diagram showing a state of the impeller portion and the fuel discharge port portion in the fuel supply device according to Embodiment 5 of the present invention. FIG. 31 is a schematic diagram showing a state of an impeller portion and a fuel discharge port portion in a fuel supply device according to Embodiment 5 of the present invention. FIG. 32 is a schematic diagram showing a state of the impeller portion and the fuel discharge port portion in the fuel supply device according to Embodiment 5 of the present invention. FIG. 33 is a schematic diagram showing a state of an impeller portion and a fuel discharge port portion in a fuel supply device according to Embodiment 5 of the present invention.

  In the above-described embodiments, the AB surfaces of the inner peripheral side A and the outer peripheral side B of the impeller blades 241, 242, and 243 of the impeller 240 are linear, and the fuel discharge ports 311, 312, and 313 of the pump base 130 are formed. In the fifth embodiment, the CD surfaces of the inner peripheral side C and the outer peripheral side D are linear. However, in the fifth embodiment, the AB surface and the CD surface are not linear, Θ1 + θ2 = 360 ° / the number of blades.

  That is, as shown in FIG. 29, for example, the angle θ1 is provided on the inner peripheral side of the impeller blades 244 of the impeller 240 and the angle θ1 is also provided on the outer peripheral side of the impeller blades 244. The angle θ2 is provided on the inner peripheral side of the outlet 314 and the angle θ2 is also provided on the outer peripheral side of the fuel discharge port 314. For example, it is formed in a square shape so as to be opposite to the square shape of the impeller blade 244. is there.

  As described above, the angle θ1 on the inner circumferential side and the outer circumferential side of the AB surface of the impeller blades 244 of the impeller 240, and the inner circumference of the CD surface of the inner circumferential side C and the outer circumferential side D of the fuel discharge port 314 of the pump base 130, respectively. By setting the angle θ2 on each of the side and the outer peripheral side, the fuel pressure pulsation width of the fuel when being sent to the fuel discharge port 314 by the impeller blades 244 of the impeller 240 can be suppressed and the blade order sound can be reduced. Can be suppressed.

  FIG. 29 shows a state before the impeller blades 244 of the impeller 240 rotate in the R direction and the AB surface of the impeller blades 244 overlaps the CD surface of the fuel discharge port 314 of the pump base 130. FIG. The impeller blades 244 further rotate in the direction and the inner peripheral side A and the outer peripheral side B of the impeller blades 244 overlap with the CD surface of the fuel discharge port 314 of the pump base 130. FIG. 31 shows the impeller blades 244 further rotated in the R direction. FIG. 32 shows a state in which the AB surface of the impeller blade 244 crosses the CD surface of the fuel discharge port 314 of the pump base 130. FIG. 32 shows that the impeller blade 244 further rotates in the R direction and the AB surface of the impeller blade 244 becomes the pump base 130. FIG. 33 shows a state where the impeller blades 244 further rotate in the R direction when the fuel discharge port 314 overlaps the CD surface of the fuel discharge port 314. AB surface of 244 indicates a more advanced state from a CD surface of the fuel discharge port 314 side of the pump base 130. Thus, the fuel pressurized in the pump chamber 300 by the rotation of the impeller blades 244 of the impeller 240 is sent from the fuel discharge port 314 of the pump base 130 to the motor chamber 320.

  As described above, the angle θ1 on the inner circumferential side and the outer circumferential side of the AB surface of the impeller blades 244 of the impeller 240, and the inner circumferential side C and the outer circumferential side D of the fuel discharge port 314 of the pump base 130 By providing an angle θ2 on each of the circumferential side and the outer circumferential side, the inner circumferential side A and the outer circumferential side B of the impeller blade 244 overlap the CD surface of the fuel discharge port 314 of the pump base 130, and the AB surface of the impeller blade 244 Crosses the CD surface of the fuel discharge port 314 of the pump base 130, the AB surface of the impeller blade 244 overlaps the CD surface of the fuel discharge port 314 of the pump base 130, and the AB surface of the impeller blade 244 extends from the pump base 130. Since the fuel is further advanced from the CD surface on the fuel discharge port 314 side, the fuel pressurized in the pump chamber 300 is discharged from the pump base 130. As shown in FIG. 11, the fuel pressure pulsation width M2 of the fuel can be suppressed to be smaller than the fuel pressure pulsation width M1 of the above-described conventional device when the fuel is delivered from the port 314 to the motor chamber 320. As shown in FIG. Since the order sound H2 can also be suppressed to be smaller than the blade order sound H1 of the above-described conventional device, the noise can be remarkably reduced and a highly reliable fuel supply device can be obtained.

  Also, the case where the AB surface of the impeller blades 244 has a square shape and the CD surface of the fuel discharge port 314 has a square shape so as to be in a symmetrical position opposite to the square shape of the AB surface has been described. It is not limited, it can also be an arc shape, and there are the same effects as in the above-described fifth embodiment.

  It should be noted that within the scope of the present invention, the embodiments can be freely combined, or the embodiments can be appropriately modified or omitted.

  This invention suppresses the fuel pressure pulsation width when the fuel is delivered from the pump base fuel discharge port by the impeller blades of the impeller, and also reduces the blade order noise, thereby significantly reducing noise and providing a highly reliable fuel. It is suitable for realizing the supply device.

  1 fuel tank, 18 fuel pump, 130 pump base, 240 impeller, 241 impeller blade, 242 impeller blade, 243 impeller blade, 244 impeller blade, 311 fuel discharge port, 312 fuel discharge port, 313 fuel discharge port, 314 fuel discharge port .

Claims (6)

A fuel pump that is attached to a fuel tank and sucks fuel in the fuel tank from a fuel suction port and delivers the fuel from a fuel discharge port; the fuel pump includes a pump base having the fuel suction port and the fuel discharge port; is constituted by an impeller which have a plurality of impellers vanes arranged along the direction of rotation for delivery from pressurized the fuel discharge port by rotating the fuel sucked from the fuel suction port of the pump base, in the plane of the top side in the rotational direction of the impeller vanes, the point of intersection in front Symbol fuel discharge port and the first a, before Symbol fuel discharge port and the last intersection point of B, and prior Symbol said fuel discharge port On the front surface with respect to rotation , C is the first point of intersection with the impeller blade, D is the last point of intersection with the impeller blade, and O is the center of rotation of the impeller. In this case, the relationship between the angle θ1 formed by OA-OB and the angle θ2 formed by OC-OD is “θ1 + θ2 = 360 ° / number of blades”. When the point A is located on the inner circumference side than the point B, the point C is located on the inner circumference side than the point D, and when the point A is located on the outer circumference side than the point B , The point C is located on the outer peripheral side of the point D,
2. The fuel supply apparatus according to claim 1 , wherein the relationship between the angle θ1 and the angle θ2 is “θ1 = θ2 .” 3. The fuel supply device according to claim 2, wherein the point A is located on the inner peripheral side of the point B, and the point C is located on the inner peripheral side of the point D. 4 . 3. The fuel supply device according to claim 2, wherein the point A is positioned on the outer peripheral side of the point B, and the point C is positioned on the outer peripheral side of the point D. 4 . The front side surface in the rotation of the impeller blades is formed in a square shape in which the central part is recessed rearward than both ends ,
A front surface of the fuel discharge port with respect to the rotation is a leading side in the rotation of the impeller blades with respect to a surface including the point A and the rotation shaft when the point A overlaps the point C. the fuel supply apparatus according to claim 1, characterized in that it is formed of a shape symmetrical with a torque-shaped surface. The front side surface in the rotation of the impeller blades is formed in an arc shape in which the central part is recessed rearward than both ends ,
A front surface of the fuel discharge port with respect to the rotation is a leading side in the rotation of the impeller blades with respect to a surface including the point A and the rotation shaft when the point A overlaps the point C. the fuel supply apparatus according to claim 1, characterized in that it is of a shape symmetrical with Na Ru circular arc shape of the surface.