WO2021027720A1

WO2021027720A1 - Side runner pump

Info

Publication number: WO2021027720A1
Application number: PCT/CN2020/107781
Authority: WO
Inventors: 陈安邦; 于刚华; 张远春; 王海涛; 官新辉; 秦锐锋
Original assignee: 广东德昌电机有限公司
Priority date: 2019-08-15
Filing date: 2020-08-07
Publication date: 2021-02-18
Also published as: DE202020005781U1; CN112392766A; CN112392766B

Abstract

A side runner pump, comprising a housing (20) and a cover (10) connected to each other, and an impeller (30) accommodated in a pump cavity (201) formed by the cover (10) and the housing (20). The impeller (30) is rotatably supported in the pump cavity (201); the cover (10) is provided with an inlet (11); the housing (20) comprises a base (27) and a side wall (21); an output substantially tangential and communicated with a fluid at the inlet (11) is provided on the side wall (21); an inner cavity cross section (211) of the outlet (210) perpendicular to an air flow direction is non-circular. The side runner pump reduces pressure pulsation caused by the airflow, and thus effectively reduces the noise.

Description

Side channel pump

Technical field

The invention relates to the field of electric technology, in particular to a side flow channel pump.

Background technique

Side runner pumps are often used to deliver fuel or secondary air to the exhaust system. When the side channel pump is used as an OPF (gasoline particulate filter) blower in automobile emission control, it not only promotes OPF regeneration, but also helps the catalyst to warm up after a cold start. In order to be able to obtain the best possible delivery or high pressure, it will cause pulses formed by the sudden pressure impact of the delivered airflow, resulting in higher noise.

technical problem

In view of this, the present invention aims to provide a side channel pump that can solve or at least alleviate the above-mentioned problems.

Technical solutions

To this end, the present invention provides a side channel pump, comprising a casing and a cover connected to each other, and an impeller accommodated in a pump cavity formed by the cover and the casing, the impeller rotatably supported In the pump cavity, the cover is provided with an inlet, the housing includes a base and a side wall, and the side wall is provided with a substantially tangential outlet in fluid communication with the inlet. The cross section of the cavity perpendicular to the air flow direction is non-circular.

In some embodiments, the cross section of the inner cavity is formed by connecting the first inner edge, the second inner edge, and the third inner edge in a circumferential direction, and the first inner edge and the second inner edge are substantially configured as V-shaped.

In some embodiments, the V shape opens toward the radially outer side of the housing.

In some embodiments, the axis of rotation of the first inner edge of the impeller constitutes a first angle [alpha], [alpha] is the angle range of 0 <α <90º.

In some embodiments, the axis of rotation of the second inner edge of said impeller form a second angle beta], the angular range beta] is 0 <β <90º.

In some embodiments, the inner side of the side wall of the housing is provided with a convex portion protruding and extending radially inwardly, and in the air flow direction, the convex portion is located downstream of the outlet and the inlet Upstream.

In some embodiments, the convex portion forms a first step and a second step on both sides in the circumferential direction, the first step is adjacent to the inlet, the second step is adjacent to the outlet, and the first step The second step and the second step extend obliquely in the direction of the base toward the cover.

In some embodiments, the side flow channel pump includes an airflow channel communicating the inlet and the outlet, and the airflow channel includes: a first formed on the cover and extending along the circumference of the cover. A channel, and/or a second channel formed on the base of the housing and extending along the circumference of the base.

In some embodiments, the bottom of the first step extends to the second passage, and the top of the first step is adjacent to the entrance.

In some embodiments, a first channel extending in the circumferential direction is formed on the cover body, one end of the first channel is located at the entrance of the cover body, and the other end extends to a first inclined surface. The first inclined surface is arranged opposite to the outlet of the casing, and the first inclined surface is inclined at an obtuse angle with respect to the first passage.

In some embodiments, the base of the housing forms a second channel extending in the circumferential direction. One end of the second channel is adjacent to the outlet, and the other end extends to a second inclined surface. The inclined surface is opposite to the entrance of the cover, and the second inclined surface is inclined at an obtuse angle with respect to the second passage.

Beneficial effect

The side flow channel pump provided by the present invention reduces the pressure pulsation caused by the air flow, improves the pneumatic audio noise, and thereby effectively reduces the noise.

Description of the drawings

Fig. 1 is a three-dimensional assembly view of a side flow channel pump according to an embodiment of the present invention.

Fig. 2 is a partial exploded view of the side flow channel pump shown in Fig. 1.

Fig. 3 is a cross-sectional view of the side channel pump shown in Fig. 1.

Fig. 4 is a schematic diagram of the cover of the side flow channel pump shown in Fig. 1.

Fig. 5 is a schematic structural diagram of the housing of the side flow channel pump shown in Fig. 1.

Fig. 6 is a schematic plan view of the cover and casing of the side flow channel pump shown in Fig. 1 in an exploded state.

Fig. 7 is a schematic plan view from another angle of the side channel pump shown in Fig. 1.

Fig. 8 is a schematic diagram of a cross section of the inner cavity of the side flow channel pump shown in Fig. 1.

Reference signs: 100-side flow channel pump; 10-cover body; 11-inlet; 12-first passage; 13-first slope; 14-first interruption area; 15-groove; 19-first connecting hole 20-housing; 201-pump cavity; 21-side wall; 210-outlet; 211-inner cavity section; 212-first inner edge; 213-second inner edge; 214-third inner edge; 22-section Two passages; 221-gap; 23-outlet section; 24-protrusions; 241-first step; 242-second step; 26-second interruption zone; 27-base; 271-motor housing; 272-base; 28- second inclined plane; 29- second connecting hole; 30- impeller; 31- blade; 32- mounting hole; 4- drive shaft; 5- seal; 6; motor; A- axis of rotation; α -first clamp Angle; β -the second included angle.

Embodiments of the invention

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments, so as to make the technical solutions and beneficial effects of the present invention clearer. It can be understood that the drawings are only provided for reference and illustration, and are not used to limit the present invention. The dimensions shown in the drawings are only for the convenience of clear description and do not limit the proportional relationship.

Referring to FIGS. 1 to 3 at the same time, the side flow channel pump 100 of an embodiment of the present invention includes a cover 10 and a casing 20 connected to each other, and a pump cavity 201 enclosed by the cover 10 and the casing 20. Impeller 30. The impeller 30 is rotatably supported by the drive shaft 4 arranged in the housing 20. Specifically, the center of the impeller 30 is provided with a mounting hole 32, and the impeller 3 is fixedly mounted on the drive shaft 4 through the mounting hole 32. In this embodiment, the drive shaft 4 is a rotating shaft of a motor 6; it is understandable that the drive shaft 4 may also be a separate shaft component that is connected to the motor 6 in transmission.

The housing 20 includes a base 27 and a side wall 21. The side wall 21 is arranged around the base 27 and together with the base 27 encloses a receiving space for accommodating the impeller 30. The cover 10 is disposed on the top end of the side wall 21 so as to close the receiving space to form the pump cavity 201. The cover 10 is provided with an inlet 11 for air flow into the pump cavity 201, and the inlet 11 is arranged along the axial direction of the cover 10. Preferably, the inlet 11 is arranged offset from the center of the cover 10. An outlet 210 is provided on the side wall 21 of the housing 20, the outlet 210 protrudes and extends substantially tangentially outward along the side wall 21, and the outlet 210 communicates with the pump cavity 201. The impeller 30 is housed in the pump cavity 201 and includes a plurality of blades 31 extending radially outward. When the impeller 30 rotates, driven by its blades 31, the airflow enters the pump cavity 201 of the side flow channel pump 100 through the inlet 11, flows along the pump cavity 201, and then is discharged from the outlet 210. Therefore, in the direction of rotation of the impeller 30, for example, in the angle shown in Figs. 1 and 2, the direction of rotation of the impeller 30 of the side channel pump 100 is clockwise, and the inlet 11 is as far away from the outlet 210 as possible. Improve the transmission power and pressure.

In this embodiment, the housing 20 further includes a motor housing 271 extending downward from the periphery of the base 27 and a base 272 connected to the end of the motor housing 271. The stator and rotor of the motor 6 are contained in the motor housing 271.

Referring to FIGS. 3 and 4 at the same time, on the side of the cover body 10 facing the housing 20 is provided with a substantially arc-shaped first channel 12. The first channel 12 extends around the center of the cover 10. In this embodiment, the first channel 12 is roughly C-shaped and is formed by recessing from the surface of the cover 10. One end of the first channel 12 is located at the entrance 11 of the cover 10, and the other end extends to a first inclined surface 13 of the cover 10, and the first inclined surface 13 is positioned opposite to the outlet 210 of the casing 20. Referring to FIGS. 3 and 5 at the same time, in this embodiment, the first inclined surface 13 obliquely extends toward the outlet 210 at an obtuse angle relative to the first passage 12 to reduce pressure pulsation caused by airflow, thereby reducing noise.

Referring to FIG. 5 at the same time, the side of the base 27 of the housing 20 facing the cover 10 is provided with a second channel 22 corresponding to the first channel 12. The second channel 22 is substantially arc-shaped and extends around the center of the housing 20. In this embodiment, the radially outer peripheral edge of the second channel 22 is located at the side wall 20. In this embodiment, the second channel 22 is also roughly C-shaped, which is recessed from the surface of the base 27 of the housing 20. Preferably, the cross-sectional shape of the first channel 12 of the cover 10 is substantially the same as the cross-sectional shape of the second channel 22, and both are substantially D-shaped. One end of the second passage 22 is connected to the outlet 210 through an outlet section 23. In this embodiment, the outlet section 23 extends in a straight line, and its cross-section is also roughly D-shaped, but the cross-sectional size of the outlet section 23 is smaller than that of the second passage 22. The other end of the second channel 22 extends to a second inclined surface 28 of the base 27, and the second inclined surface 28 is opposite to the entrance 11 of the cover 10. The second inclined surface 28 extends obliquely toward the inlet 11 at an obtuse angle relative to the second passage 22.

6 at the same time, a first interruption zone 14 is formed between the inlet 11 of the cover body 10 and the first inclined surface 13, and a second interruption zone 26 is formed between the outlet section 23 of the housing 20 and the second inclined surface 28. The first interruption area 14 is flush with the top of the first inclined surface 13, and the second interruption area 26 is flush with the top of the second inclined surface 28. In this embodiment, the first interruption area 14 and the second interruption area 26 are opposite to each other. Preferably, the first interruption zone 14 and the second interruption zone 26 are parallel to each other. The arrangement of the first middle zone 14 and the second interruption zone 26 is beneficial to prevent the short-circuit flow of the air flow against the rotation direction of the impeller 3.

The diameter of the impeller 30 is smaller than the inner diameter of the side wall 21 of the casing 20, so a gap 221 is formed between the impeller 30 and the casing 20. The outer diameters of the first passage 12 and the second passage 22 are slightly larger than the outer diameter of the impeller 30, so that the first passage 12 and the second passage 22 are respectively communicated with the axial ends of the gap 221.

Referring to FIGS. 2, 7 and 8 at the same time, the outlet 210 of the housing 20 is non-circular in the cross section 211 of the inner cavity perpendicular to the airflow direction. In this embodiment, the cross-section 211 of the inner cavity is substantially V-shaped. In order to be more clear about the shape of the inner cavity section 211, FIG. 8 shows the angular relationship of the inner cavity section 211. The inner cavity section 211 is enclosed by a first inner edge 212, a second inner edge 213, and a third inner edge 214 connected end to end in the circumferential direction. The first inner edge 212 and the second inner edge 213 are substantially V-shaped, and the V-shape opens toward the radially outer side of the housing 20. 1 toward the base 27 at a first inclination extending from adjacent the inner edge of the cover 212 in a first direction, which forms a first angle [alpha] with the axis A 30 of the impeller rotation, the angle [alpha] is the range 0 <α <90º. The second inner edge 213 extends obliquely in a second direction opposite to the first direction from the end of the first inner edge 212 toward the base 27, and forms a second included angle β with the rotation axis A of the impeller 30, and the angle range of β is 0 < β <90º. Preferably, α = 45º and β = 45º. The third inner edge 214 is substantially a circular arc segment connected to the two ends separated from the first inner edge 212 and the second inner edge 213. The above design can reduce the pressure pulsation caused by the air flow and reduce the noise.

2 and 5 at the same time, further, the inner wall of the side wall 21 of the housing 20 is provided with a convex portion 24 protruding inward in the radial direction, so that a first step 241 and a first step 241 and The second step 242. The convex portion 24 is provided between the outlet 210 of the housing 20 and the inlet 11 of the cover 10. The first step 241 is adjacent to the inlet 11 and located upstream of the inlet 11 (that is, in front of the inlet 11 in the rotation direction of the impeller 30). The second step 242 is adjacent to the outlet 210 and located downstream of the outlet 210 (that is, behind the outlet 210 in the rotation direction of the impeller 30). Both the first step 241 and the second step 242 are arranged obliquely with respect to the rotation axis A of the impeller 30, and extend from the base 27 toward the cover 10 obliquely to each other, so that the bottom of the convex portion 24 extends along the side wall 21 The length is greater than the length of the top. The arrangement of the convex portion 24 can further reduce the pressure pulsation caused by the air flow, thereby improving aerodynamic audio noise.

FIG. 6 shows a schematic exploded plan view of the cover 10 and the housing 20, in which the positions of the cover 10 and the housing 20 are in one-to-one correspondence, so as to more clearly show the corresponding relationship between the parts. Referring to FIGS. 5 and 6 at the same time, in this embodiment, the bottom of the first step 241 crosses the second inclined surface 28 of the housing 20 in the circumferential direction and extends to the second channel 22. The top of the first step 241 is located directly above the second inclined surface 28. The bottom of the second step 242 is adjacent to the inner side of the outlet section 23 of the housing 20. Preferably, the second step 242 extends upward to the top of the side wall 21 of the housing 20 at an inclination angle tangential to the inner side of the outlet section 23.

Referring to FIG. 2, further, in this embodiment, the cover body 10 is provided with a plurality of first connecting holes 19 on its outer edge, and the housing 20 is correspondingly provided with a plurality of second connecting holes 29. The fastener can pass through the corresponding first connecting hole 19 and the second connecting hole 29 to fix the cover 10 to the housing 20. Referring to FIG. 3, the cover body 10 is provided with a circumferentially extending groove 15 on the radially outer side of the first channel 12 thereof for fixing the sealing element 5 so as to form a seal between the cover body 10 and the housing 20. In addition, preferably, the adjacencies of each of the above-mentioned regions are designed with rounded corners.

The side-channel pump provided by the present invention reduces the size of the flow through the non-circular cavity section 211 and/or the inclined first step 241 located upstream of the inlet 11 and/or the inclined second step 242 located downstream of the outlet 210 This reduces the pressure pulsation caused by the airflow, thereby effectively reducing noise.

The above are only preferred specific embodiments of the present invention. The protection scope of the present invention is not limited to the above-listed examples. Any person skilled in the art can obviously obtain technology within the technical scope disclosed by the present invention. Simple changes or equivalent replacements of the solutions fall within the protection scope of the present invention.

Claims

A side flow channel pump, comprising a casing (20) and a cover (10) connected to each other, and an impeller contained in a pump cavity (201) formed by the cover (10) and the casing (20) (30), the impeller (30) is rotatably supported in the pump chamber (201), the cover (10) is provided with an inlet (11), and the housing (20) includes a base (27) ) And a side wall (21), the side wall (21) is provided with a substantially tangential outlet (210) in fluid communication with the inlet (11), characterized in that the outlet (210) is perpendicular to The cross section (211) of the inner cavity in the air flow direction is non-circular.
The side channel pump according to claim 1, characterized in that the inner cavity section (211) connects the first inner edge (212), the second inner edge (213) and the third inner edge sequentially from the circumferential direction. (214) is enclosed, the first inner edge (212) and the second inner edge (213) are roughly constructed in a V shape.
The side flow channel pump according to claim 2, wherein the V shape opens toward the radially outer side of the casing (20).
The side-channel pump according to claim 2, wherein the first inner edge (212) and the rotation axis (A) of the impeller (30) form a first included angle α , and the angle range of α is 0 < α <90º.
The side-channel pump according to claim 2, wherein the second inner edge (213) and the rotation axis (A) of the impeller (30) form a second included angle β , and the angle range of β is 0 < β <90º.
The side channel pump according to claim 1, wherein the inner side of the side wall (21) of the casing (20) is provided with a convex portion (24) protruding and extending inward in the radial direction. In the flow direction of the airflow, the convex portion (24) is located downstream of the outlet (210) and upstream of the inlet (11).
The side flow channel pump according to claim 6, characterized in that the convex portion (24) respectively forms a first step (241) and a second step (242) on both sides in the circumferential direction, and the first step ( 241) is adjacent to the inlet (11), the second step (242) is adjacent to the outlet (210), the first step (241) and the second step (242) are located on the base (27) ) Extend obliquely towards each other in the direction of the cover (10).
The side flow channel pump according to claim 7, characterized by comprising an air flow channel connecting the inlet (11) and the outlet (210), and the air flow channel comprises: formed in the cover (10) The first channel (12) on and extending along the circumference of the cover (10), and/or formed on the base (27) of the housing (20) and along the base (27) The circumferentially extending second channel (22).
The side channel pump according to claim 8, characterized in that the bottom of the first step (241) extends to the second channel (22), and the top of the first step (241) is adjacent to the The entrance (11).
The side flow channel pump according to any one of claims 1 or 6, characterized in that a first channel (12) extending in the circumferential direction is formed on the cover (10), and the first channel (12) ) Is located at the entrance (11) of the cover (10), and the other end extends to a first inclined surface (13), the first inclined surface (13) and the housing (20) The outlets (210) are arranged oppositely, and the first inclined surface (13) is inclined at an obtuse angle with respect to the first channel (12).
The side channel pump according to claim 1 or 6, characterized in that the base (27) of the housing (20) forms a second channel (22) extending in the circumferential direction, and the second One end of the channel (22) is adjacent to the outlet (210), and the other end extends to a second inclined surface (28), the second inclined surface (28) is opposite to the inlet (11) of the cover (10) The second inclined surface (28) is inclined at an obtuse angle with respect to the second channel (22).
A side flow channel pump, comprising a casing (20) and a cover (10) connected to each other, and an impeller contained in a pump cavity (201) formed by the cover (10) and the casing (20) (30), the impeller (30) is rotatably supported in the pump chamber (201), the cover (10) is provided with an inlet (11), and the housing (20) includes a base (27) ) And a side wall (21), the side wall (21) is provided with a substantially tangential outlet (210) in fluid communication with the inlet (11), characterized in that the outlet (210) is perpendicular to The cross section (211) of the inner cavity in the air flow direction is V-shaped.
The side flow channel pump according to claim 12, wherein the V-shape opens toward the radially outer side of the casing (20).