CN207333180U - A kind of extreme pressure pump - Google Patents

Abstract

The utility model provides a kind of extreme pressure pump, belongs to water pump technology.It solves the problems, such as that existing extreme pressure pump intensity is weaker.This extreme pressure pumps, including the pump housing, there is at least one columnar pump chamber in the pump housing, the inlet opening being connected with pump chamber and apopore are offered on the pump housing, pump shaft is rotatably connected in pump chamber, which is located at the eccentric position of pump chamber, push plate is radially slidably connected on pump shaft, push plate in pump chamber is one, and the both ends of push plate can stretch out the outer circumferential surface of pump shaft, and the both ends of push plate are resisted against on the inner peripheral surface of pump chamber.This extreme pressure pump has higher intensity.

Description

A kind of extreme pressure pump

Technical field

The utility model belongs to water pump technology, is related to a kind of extreme pressure pump.

Background technology

Water pump is the mechanical equipment for conveying liquid or being pressurized liquid, and the technical parameter of pump performance has flow, suction, raises Journey, shaft power, water-horse power, efficiency etc., can be divided into the types such as volume water pump, vane pump according to different operation principles.Vane pump It is to transmit energy, such as centrifugal pump using the interaction of rotary vane and water, the centrifugal force for rotating at a high speed and producing in impeller Under the action of, the water in impeller channel is thrown toward surrounding, is pressed into spiral case, and impeller eye forms vacuum, and water is in external atmospheric pressure Under be inhaled into supplemented with this space, it is limited yet with centrifugal force, therefore this kind of water pump is lacked there are hydraulic pressure is low, lift is small Fall into.

And positive displacement pump is to transmit energy using the change of its swept volume of a single chamber, therefore larger hydraulic pressure can be produced, such as Chinese utility model patent application (application number：201520763099.0) disclose a kind of two-stage plate turning type positive displacement pump, including shell Body, transmission shaft, rotating plate, stator, the stator are installed on housing, and transmission shaft is arranged on stator interior, symmetrical cloth on transmission shaft Be equipped with rotating plate, radial arrangement of the rotating plate along transmission shaft, and can under the influence of centrifugal force after radial motion with bore of stator Contact, the positive displacement pump are mainly used for sending oil, different with the medium of water pump conveying, while rotating plate is needed by centrifugal force ability Enough to be contacted with bore of stator, in the slow-speed of revolution, there are hysteresis quality.

In view of the above-mentioned problems, Chinese invention patent application (application number：201010549615.1) disclose it is a kind of centrifugal Positive displacement pump, includes the pump case of the interior pump chamber for being equipped with cylinder, and eccentric setting has rotor in pump case；Circumferentially it is uniformly provided with rotor Some radial holes, coordinate in radial hole inserted with plunger, and plunger is equipped with roller towards the end of pump chamber, during rotor rotation, with oil Axis, which blocks to be equipped with the radial hole side that volume gradually increases, radial hole all the time, pushes the spring that plunger outward is stretched out, the column Plug is by spring and pump chamber inner wall against but being required to set multiple rotating plates in the positive displacement pump pump chamber in two patent document above Either plungers and two opposite rotating plates or plunger are symmetrical arranged and stretch out rotor respectively, due to internal rotor need it is reserved For rotating plate either plunger retraction space for this rotating plate or plunger stretch out the connection area after rotor between rotor compared with It is small, cause rotating plate either plunger is unstable easily occur rotating plate at high water pressures or plunger is rocked or deformed, cause easily By weakened.

The content of the invention

The purpose of this utility model is that there are the above problem for existing technology, it is proposed that a kind of extreme pressure pump, the extreme pressure Pump has higher intensity.

The purpose of this utility model can be realized by following technical proposal：A kind of extreme pressure pump, including the pump housing, the pump housing It is interior that there is at least one columnar pump chamber, the inlet opening being connected with pump chamber and apopore, the pump chamber are offered on the pump housing Pump shaft is inside rotatably connected to, which is located at the eccentric position of pump chamber, and push plate is radially slidably connected on the pump shaft, it is special Sign is, the push plate in the pump chamber is one, and the both ends of push plate can stretch out the outer circumferential surface of pump shaft, the two of the push plate End is resisted against on the inner peripheral surface of pump chamber.

Motor drive pump shaft rotation, pump shaft and pump chamber eccentric setting, and push plate be separated out in pump chamber into water chamber and The chamber of water outlet, the chamber of water inlet become larger, so that water be pumped into from inlet opening, the chamber of water outlet tapers into, so that will Water is extruded from apopore, is realized and is pumped, which has and send compared with the centrifugal pump of conventionally employed impeller mode, Vortex pump etc. Water, certainly when extreme pressure pump is used to draw water, can be evacuated to the height of higher, i.e. this pole by the characteristics of water pressure and lift bigger Press pump has the suction of bigger, and wherein extreme pressure pump is used to draw water and press the component of water there was only the push plate of a monoblock type, by this The both ends of push plate lean to form the chamber of water inlet and water outlet with pump chamber inner peripheral surface, with conventionally employed multiple push plates and push plate list While against positive displacement pump compare, this push plate realizes the function of the multiple push plates of traditional positive displacement pump, has the higher structure strong Degree, while the inner peripheral surface of pump chamber can be kept and be oriented to the both ends of push plate, ensure that the strength and stability of push plate, into One step, the inner peripheral surface of the both ends of this push plate with pump chamber leans, when the distance between pump shaft outer circumferential surface and pump chamber inner peripheral surface Become hour push plate opposite pump shaft can be slided by the inner peripheral surface pushing tow of pump chamber, make push plate with conventionally employed spring or centrifugal force Slide, spring strength is insufficient, centrifugal force hysteresis is unstable compares, this push plate is the opposite pump under the thrusting action of pump chamber inner peripheral surface Axis reciprocatingly slides so that the overall intensity higher of extreme pressure pump.

In above-mentioned extreme pressure pump, the inner peripheral surface of the pump chamber is the cylinder of continuous bend, between the pump chamber inner peripheral surface Arbitrarily along the line of pump shaft radial direction apart from all same.This extreme pressure pump uses single push plate, different from traditional push plate by spring or Person's centrifugal force, which is realized, to be slided, and the forward and reverse of this push plate, which slides, to be required to the inner peripheral surface of pump chamber and carry out pushing tow, and push plate is along pump Axis radially slides, and is arbitrarily required to for this between pump chamber inner peripheral surface along the line distance of pump shaft radial direction identical so that push plate turns Both ends can lean with pump chamber inner peripheral surface during optional position when dynamic, while pump chamber inner peripheral surface all the time carries out the both ends of push plate Keep and be oriented to, to improve the integral strength of extreme pressure pump.

In above-mentioned extreme pressure pump, the guide groove of perforation is radially offered on the pump shaft, the guide groove both ends Needle roller one is rotatably connected in pocket side wall, and the axial direction of needle roller one and the axial direction of pump shaft are consistent, the push plate slides through Guide groove, and the side of push plate and the outer circumferential surface of needle roller one lean.Although push plate is slidably connected in guide groove, but be to maintain Push plate state is needle roller, and needle roller can reduce frictional resistance when push plate is slided and reduce abrasion, to ensure push plate and pump shaft Between structural strength, while the larger reaction that pump shaft outer circumferential surface section branch is subject to water in pump chamber is stretched out in push plate, therefore will rolling Pin is positioned close to the notch position of pump shaft outer circumferential surface, and opposite needle roller clamps push plate so that pump shaft outer circumferential surface section is stretched out in push plate It is fixed that code insurance keeps steady, and avoiding the occurrence of rock, shift etc. influences the factor that extreme pressure pumps intensity.

In above-mentioned extreme pressure pump, there is columnar rotor on the pump shaft, the outside diameter of the rotor is more than the outside diameter of pump shaft, Above-mentioned guide groove is opened on rotor, and the rotor opens up fluted one in the pocket side wall of guide groove, one turn of the needle roller It is dynamic to be connected in groove one, and the outer circumferential surface of needle roller one protrudes the notch of groove one and leans with push plate side.Rotor it is straight Footpath is larger so that and it is in larger distance between two pairs of needle rollers at two notches, so that the support and holding to push plate are more stablized, to carry Structural strength between high push plate and pump shaft, and groove one is so that the outer circumferential surface of needle roller is local protrusion, to reduce push plate plate Gap between face and guide groove cell wall, so that reducing the indoor water of water chamber penetrates into water inlet chamber.

In above-mentioned extreme pressure pump, the both ends edge of the push plate opens up fluted two along its length, the groove Needle roller two is rotatably connected in two, the notch of the outer circumferential surface protrusion groove two of the needle roller two simultaneously offsets with pump chamber inner peripheral surface Lean on.The medium of this extreme pressure pump conveying is water, has self-lubricating function different from oil pump etc., the end edge of push plate for this is rolled along setting Pin two, is leant by needle roller two and pump chamber inner peripheral surface, to reduce the frictional resistance and two between push plate and pump chamber inner peripheral surface Abrasion between person, certainly compared with roller, needle roller can form linear sealing between pump chamber inner peripheral surface, so as to avoid water chamber Indoor water penetrates into water inlet chamber and influences efficiency.

In above-mentioned extreme pressure pump, the pump chamber in the pump housing has two, and above-mentioned pump shaft passes through two pump chambers, two pump chambers With respect to pump shaft eccentric setting, two pump chambers with respect to pump shaft eccentric direction on the contrary, and eccentric distance it is identical, two pump chambers An above-mentioned push plate is inside equipped with, and the push plate in two pump chambers is at grade.Since pump chamber is eccentric with respect to pump shaft, in order to Prevent occurring strenuous vibration in the course of work, this extreme pressure pump sets two pump chambers, and two pump chambers are radially symmetrical pump shaft Set, so as to play balanced action, to reduce vibrations, while two push plates are at grade, protected when also can rotate pump shaft Maintain an equal level integral strength that is steady, and then improving extreme pressure pump.

In above-mentioned extreme pressure pump, partition plate is fixed with the pump shaft, the both sides of the partition plate form above-mentioned pump chamber respectively, Two pump covers are also fixed with the pump shaft, which is located on the pump housing positioned at the both ends of the pump housing and lid respectively, the partition plate Sliding slot, end face and cunning of the push plate along the edge of pump shaft radial direction higher than rotor are offered on the medial surface of two sides and pump cover It is dynamic to be connected in sliding slot.Partition plate and pump cover are connected on pump shaft, occur with partition plate and pump cover the phase in circumferential direction to avoid push plate To sliding, friction and wear is reduced, certain structure also enables push plate to be radially slidably connected in sliding slot, and sliding slot can Push plate is oriented to and is supported, so as to improve the intensity of push plate.

In above-mentioned extreme pressure pump, the push plate opens up fluted three along the edge both ends of pump shaft radial direction, the groove three Length direction and push plate length direction it is perpendicular, rotation connection needle roller three, the outer circumferential surface of the needle roller three in the groove three Protrude the notch of groove three and lean with sliding slot bottom surface.Needle roller three can reduce the friction and wear between push plate and sliding slot, Needle roller three is supported the end at push plate edge at the same time, determines so that push plate stretches out pump shaft outer circumferential surface section code insurance and keeps steady, It is combined at the same time by needle roller one, needle roller two and needle roller three so that push plate is propped up on length, width and thickness direction Support, to improve the structural strength between the intensity of push plate and push plate and pump shaft and the pump housing.

In above-mentioned extreme pressure pump, the outer circumferential surface of the rotor and the inner peripheral surface of pump chamber lean, and above-mentioned inlet opening and go out Water hole is close to the position that rotor outer periphery face leans with pump chamber inner peripheral surface and is located at both sides respectively.In rotor outer periphery face and pump chamber Side face, which leans, realizes water proof, so as to form water inlet chamber in side, opposite side forms water outlet chamber, and rotor is resisted against pump chamber On inner peripheral surface, reaction force of the water to pump shaft when pressing water to offset so that pump shaft is more stablized, so as to improve the intensity of pump shaft.

In above-mentioned extreme pressure pump, the extreme pressure pump further includes pump case, which has columned inner cavity, the pump housing It is in the form of a column and is fixedly plugged in pump case, the pump shaft and the concentric setting of the pump housing.Needed for assembling, the pump housing, which can use, to be divided Body formula is assembled to be formed, and pump case can make the pump housing after assembly keep stable at high water pressures, improve the integral strength of extreme pressure pump.

Compared with prior art, this extreme pressure pump has the following advantages：

1st, it is and conventionally employed multiple since this extreme pressure pump is used to draw water and press the component of water there was only the push plate of a monoblock type Push plate and push plate it is unilateral against positive displacement pump compare, this push plate realizes the function of the multiple push plates of traditional positive displacement pump, has Higher structural strength.

2nd, since the both ends of push plate lean with pump chamber inner peripheral surface, slide push plate with conventionally employed spring or centrifugal force Dynamic, spring strength is insufficient, centrifugal force hysteresis is unstable compares, this push plate is the opposite pump shaft under the thrusting action of pump chamber inner peripheral surface Reciprocatingly slide so that the overall intensity higher of extreme pressure pump.

3rd, due to being combined by needle roller one, needle roller two and needle roller three so that push plate is on length, width and thickness direction It is supported, to improve the structural strength between the intensity of push plate and push plate and pump shaft and the pump housing.

Brief description of the drawings

Fig. 1 is the dimensional structure diagram of extreme pressure pump.

Fig. 2 is the dimensional structure diagram of the pump housing.

Fig. 3 is the structure rearview of extreme pressure pump.

Fig. 4 is the structure sectional view at A-A in Fig. 3.

Fig. 5 is the structure sectional view at B-B in Fig. 4.

Fig. 6 is the schematic enlarged-scale view at C in Fig. 2.

Fig. 7 is the structure sectional view at D-D in Fig. 4.

Fig. 8 is the structure sectional view at E-E in Fig. 3.

Fig. 9 is the dimensional structure diagram of pump case.

Figure 10 is the structure sectional view at F-F in Fig. 3.

Figure 11 is the schematic enlarged-scale view at G in Fig. 8.

In figure, 1, pump case；11st, water inlet；12nd, water outlet；13rd, water inlet flow channel；131st, circumferential sections one；132nd, axial direction part One；133rd, water section is crossed；14th, outlet passage；141st, axial direction part two；142nd, circumferential sections two；15th, return port；2nd, the pump housing；21st, pump chamber； 22nd, inlet opening；23rd, apopore；3rd, pump shaft；31st, rotor；32nd, guide groove；321st, groove two；322nd, needle roller two；33rd, partition plate； 34th, pump cover；35th, sliding slot；4th, push plate；41st, groove one；42nd, needle roller one；43rd, groove three；44th, needle roller three；5th, valve body；51st, pressure release Runner；511st, pressure release import；512nd, pressure relief vent；513rd, water hole；52nd, connector；53rd, slideway；6th, spool；7th, spring.

Embodiment

It is specific embodiment of the utility model and with reference to attached drawing below, the technical solution of the utility model is made further Description, but the utility model is not limited to these embodiments.

As shown in Figure 1, a kind of extreme pressure pump, including pump case 1, the pump housing 2 and pump shaft 3, pump case 1 have columned inner cavity, pump Body 2 is in the form of a column and is fixedly plugged in pump case 1, and pump shaft 3 is rotated and is threaded through in the pump housing 2, and with reference to shown in Fig. 2, the pump housing 2 has column Pump chamber 21, the inlet opening 22 being connected with pump chamber 21 and apopore 23 are offered on 2 periphery wall of the pump housing, with reference to Fig. 3, Fig. 4, Shown in Fig. 5, pump shaft 3 and 2 concentric setting of the pump housing, and pump chamber 21 and 2 eccentric setting of the pump housing, pump shaft 3 are located at the bias of pump chamber 21 Position, the inner peripheral surface of pump chamber 21 are the cylinder of continuous bend, arbitrarily along the line distance of 3 radial direction of pump shaft between 21 inner peripheral surface of pump chamber All same, has columnar rotor 31 on pump shaft 3, and the outside diameter of the rotor 31 is more than the outside diameter of pump shaft 3, the outer circumferential surface of rotor 31 with The inner peripheral surface of pump chamber 21 leans, and inlet opening 22 and apopore 23 are close to 31 outer circumferential surface of rotor and lean with 21 inner peripheral surface of pump chamber Position and be located at both sides respectively.The guide groove 32 of perforation is radially offered on rotor 31, slides and wears in guide groove 32 There is the push plate 4 of rectangle, and the quantity of 21 inner pushing plate 4 of pump chamber is one, the both ends of push plate 4 can stretch out the periphery of rotor 31 Face, and the both ends of push plate 4 are resisted against on the inner peripheral surface of pump chamber 21.

Specifically, with reference to shown in Fig. 6, fluted 1 are opened up in the pocket side wall at 32 both ends of guide groove, groove one Needle roller 1 is rotatably connected in 41, the axial direction of needle roller 1 is axial consistent with pump shaft 3, and the outer circumferential surface protrusion of needle roller 1 is recessed The notch of groove 1 simultaneously leans with 4 side of push plate.The both ends edge of push plate 4 opens up fluted 2 321 along its length, recessed Be rotatably connected to needle roller 2 322 in groove 2 321, the length of needle roller 2 322 is highly consistent with push plate 4, needle roller 2 322 it is outer The notch of side face protrusion groove 2 321 simultaneously leans with 21 inner peripheral surface of pump chamber.Partition plate 33 is fixed with pump shaft 3, the partition plate 33 Both sides form pump chamber 21 respectively, i.e., have two pump chambers 21 in the pump housing 2, and pump shaft 3 passes through two pump chambers 21, the opposite pump of two pump chambers 21 3 eccentric setting of axis, the eccentric direction of the opposite pump shaft 3 of two pump chambers 21 on the contrary, and eccentric distance it is identical, be equipped with one in two pump chambers 21 A push plate 4, and the push plate 4 in two pump chambers 21 is at grade, and two pump covers 34 are also fixed with pump shaft 3, which divides Not Wei Yu the pump housing 2 both ends and lid be located on the pump housing 2, offer sliding slot on the two sides of partition plate 33 and the medial surface of pump cover 34 35, end face of the push plate 4 along the edge of 3 radial direction of pump shaft higher than rotor 31 is simultaneously slidably connected in sliding slot 35, and push plate 4 is along 3 footpath of pump shaft To edge both ends open up fluted 3 43, the length direction and the length direction of push plate 4 of the groove 3 43 are perpendicular, groove Rotation connection needle roller 3 44 in 3 43, the notch of the outer circumferential surface protrusion groove 3 43 of the needle roller 3 44 simultaneously offset with 35 bottom surface of sliding slot Lean on.

With reference to shown in Fig. 7, the end face center position of pump case 1 offers water inlet 11, and feed water flow is further opened with pump case 1 Road 13, the water inlet flow channel 13 include the axial direction part axially set along pump case 1 along the circumferentially disposed circumferential sections one 131 and two of pump case 1 One 132, circumferential sections 1 are located at the end of pump case 1, and water inlet 1111 crosses water section 133 and circumferential sections by what is be disposed radially One 131 are connected, and the one end of the both ends of circumferential sections 1 respectively with two axial direction parts 1 is connected, and inlet opening 22 has two, Two inlet opening 22 is connected with two pump chambers 21 respectively, and the other end of two axial direction parts 1 is connected with two inlet openings 22 respectively. With reference to shown in Fig. 8, Fig. 9,10, water outlet 12 is offered on the side wall of pump case 1, outlet passage is further opened with 1 inner wall of pump case 14, outlet passage 14 includes the circumferentially arranged circumferential sections 2 142 of axially disposed axial direction part 2 141 and two, water outlet 12 It is connected with axial direction part 2 141, and the one end of the both ends of axial direction part 2 141 respectively with two circumferential sections 2 142 is connected, apopore 23 have two, which is connected with two pump chambers 21 respectively, the other ends of two circumferential sections 2 142 respectively with two apopores 23 are connected.

With reference to shown in Figure 11, the valve body 5 of bulk is fixed with the outer wall of pump case 1, pressure release runner 51 is offered in valve body 5, The pressure release runner 51 includes pressure release import 511 and the pressure relief vent 512 being opened on 5 side of valve body, and the outer wall of pump case 1 is equipped with Return port 15, the return port 15 are connected with the middle part of circumferential sections 1, and pressure relief vent 512 is opposite with return port 15 to be connected, and is let out It is pressed into mouth 511 to connect relatively with water outlet 12, pressure release import 511 is connected with pressure relief vent 512 by water hole 513, in valve Slideway 53 is further opened with body 5, the slideway 53 is opposite with water hole 513 to be connected, and columnar spool is slidably connected in slideway 53 6, spring 7 is additionally provided with slideway 53, the spring 7 and one end of spool 6 are fixedly connected with, and spool 6 is another under the action of spring 7 End is towards pressure release import 511 and grafting closure is in water hole 513, can when the hydraulic pressure in outlet passage 14 is more than setting value Spool 6 is ejected into water hole 513 so that pressure release import 511 is connected with pressure relief vent 512.Offered on the lateral surface of valve body 5 The connector 52 being connected with pressure release import 511, connector 52 are used to connect water pipe.

The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute Described specific embodiment can be done various modifications or additions or using similar by belonging to those skilled in the art Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.

Although the terms such as pump case 1, water inlet 11, water outlet 12 are used more herein, it is not precluded from using other The possibility of term.The use of these terms is merely for the convenience of describing and explaining the nature of the invention；Them It is all contrary to the spirit of the present invention to be construed to any one of the additional limitations.

Claims (10)

1. a kind of extreme pressure pump, including the pump housing (2), the pump housing (2) is interior to have at least one columnar pump chamber (21), in the pump housing (2) inlet opening (22) being connected with pump chamber (21) and apopore (23) are offered on, is rotatably connected in the pump chamber (21) Pump shaft (3), the pump shaft (3) are located at the eccentric position of pump chamber (21), push plate (4) are radially slidably connected on the pump shaft (3), It is characterized in that, the push plate (4) in the pump chamber (21) is one, and the both ends of push plate (4) can stretch out the outer of pump shaft (3) Side face, the both ends of the push plate (4) are resisted against on the inner peripheral surface of pump chamber (21).

2. extreme pressure pump according to claim 1, it is characterised in that the inner peripheral surface of the pump chamber (21) is the column of continuous bend Face, arbitrarily along the line of pump shaft (3) radial direction apart from all same between pump chamber (21) inner peripheral surface.

3. extreme pressure pump according to claim 1 or 2, it is characterised in that radially offer perforation on the pump shaft (3) Guide groove (32), is rotatably connected to needle roller one (42), and needle roller one (42) in the pocket side wall at guide groove (32) both ends Axial direction and pump shaft (3) it is axial consistent, the push plate (4) slides through guide groove (32), and the side of push plate (4) and needle roller The outer circumferential surface of one (42) leans.

4. extreme pressure pump according to claim 3, it is characterised in that there is columnar rotor (31) on the pump shaft (3), should The outside diameter of rotor (31) is more than the outside diameter of pump shaft (3), and above-mentioned guide groove (32) is opened on rotor (31), and the rotor (31) exists Fluted one (41) are opened up in the pocket side wall of guide groove (32), the needle roller one (42) is rotatably connected in groove one (41), And the outer circumferential surface of needle roller one (42) protrudes the notch of groove one (41) and leans with push plate (4) side.

5. extreme pressure pump according to claim 1 or 2, it is characterised in that the both ends edge of the push plate (4) is along length side To fluted two (321) are opened up, needle roller two (322), the needle roller two (322) are rotatably connected in the groove two (321) Outer circumferential surface protrusion groove two (321) notch and lean with pump chamber (21) inner peripheral surface.

6. extreme pressure according to claim 4 pump, it is characterised in that the pump chamber (21) in the pump housing (2) has two, above-mentioned Pump shaft (3) passes through two pump chambers (21), and two pump chambers (21) are opposite with respect to pump shaft (3) eccentric setting, two pump chambers (21) The eccentric direction of pump shaft (3) on the contrary, and eccentric distance it is identical, is equipped with an above-mentioned push plate (4) in two pump chambers (21), And two push plates (4) in pump chamber (21) is at grade.

7. extreme pressure pump according to claim 6, it is characterised in that be fixed with partition plate (33), the partition plate on the pump shaft (3) (33) both sides form above-mentioned pump chamber (21) respectively, and two pump covers (34) are also fixed with the pump shaft (3), two pump cover (34) It is located at respectively positioned at the both ends of the pump housing (2) and lid on the pump housing (2), the two sides of the partition plate (33) and the medial surface of pump cover (34) On offer sliding slot (35), end face of the push plate (4) along the edge of pump shaft (3) radial direction higher than rotor (31) is simultaneously slidably connected In sliding slot (35).

8. extreme pressure pump according to claim 7, it is characterised in that edge both ends of the push plate (4) along pump shaft (3) radial direction Fluted three (43) are opened up, the length direction and the length direction of push plate (4) of the groove three (43) are perpendicular, the groove three (43) in rotation connection needle roller three (44), the needle roller three (44) outer circumferential surface protrusion groove three (43) notch and with sliding slot (35) Bottom surface leans.

9. extreme pressure pump according to claim 4, it is characterised in that the outer circumferential surface of the rotor (31) is interior with pump chamber (21) Side face leans, and above-mentioned inlet opening (22) and apopore (23) are close to rotor (31) outer circumferential surface and offset with pump chamber (21) inner peripheral surface The position leaned on simultaneously is located at both sides respectively.

10. extreme pressure pump according to claim 1 or 2, it is characterised in that the extreme pressure pump further includes pump case (1), the pump case (1) there is columned inner cavity, the pump housing (2) is in the form of a column and is fixedly plugged in pump case (1), the pump shaft (3) and the pump housing (2) concentric setting.