CN112392766B

CN112392766B - Side runner pump

Info

Publication number: CN112392766B
Application number: CN201910755557.9A
Authority: CN
Inventors: 陈安邦; 于刚华; 张远春; 王海涛; 官新辉; 秦锐锋
Original assignee: Johnson Electric Guangdong Co Ltd
Current assignee: Johnson Electric Guangdong Co Ltd
Priority date: 2019-08-15
Filing date: 2019-08-15
Publication date: 2023-08-18
Anticipated expiration: 2039-08-15
Also published as: WO2021027720A1; DE202020005781U1; CN112392766A

Abstract

The invention relates to the technical field of electric motor, and provides a side-flow pump. The side-stream pump includes a housing and a cover connected to each other, and an impeller received in a pump chamber defined by the cover and the housing, the impeller being rotatably supported in the pump chamber, the cover having an inlet, the housing including a base and a sidewall having a generally tangential outlet in fluid communication with the inlet, the outlet being non-circular in cross-section along an interior chamber perpendicular to the direction of flow of the air stream. The side-flow pump provided by the invention reduces pressure pulsation caused by air flow, thereby effectively reducing noise.

Description

Side runner pump

Technical Field

The invention relates to the technical field of electric motor, in particular to a side-flow pump.

Background

Side channel pumps are commonly used to deliver fuel or secondary air into the exhaust system. When used as an OPF (gasoline particulate filter) blower in automotive emissions control, the side-runner pump not only promotes OPF regeneration, but also aids in co-catalyst warm-up after cold start. In order to be able to obtain as good a delivery or a high pressure as possible, it may lead to pulses due to sudden pressure shocks of the delivered air flow, and thus to high noise.

Disclosure of Invention

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

To this end, the invention provides a side-stream pump comprising a housing and a cover connected to each other, and an impeller accommodated in a pump chamber formed by the cover and the housing, the impeller being rotatably supported in the pump chamber, the cover being provided with an inlet, the housing comprising a base and a side wall provided with a substantially tangential outlet in fluid communication with the inlet, the outlet being non-circular in cross-section along an inner chamber perpendicular to the direction of flow of the air stream.

In some embodiments, the lumen cross-section is bounded by a first inner edge, a second inner edge, and a third inner edge joined circumferentially in sequence, the first inner edge and the second inner edge being generally configured in a V-shape.

In some embodiments, the V-shape opens radially outward of the housing.

In some embodiments, the first inner edge forms a first angle α with the rotation axis of the impeller, the angle α ranging from 0< α <90 °.

In some embodiments, the second inner edge forms a second angle β with the rotation axis of the impeller, the angle β ranging from 0< β <90 °.

In some embodiments, the inner side of the side wall of the housing is provided with a radially inwardly protruding extension downstream of the outlet and upstream of the inlet in the direction of flow of the air flow.

In some embodiments, the protrusion forms a first step and a second step on both sides in the circumferential direction, the first step being adjacent to the inlet, the second step being adjacent to the outlet, the first step and the second step extending obliquely toward each other in a direction of the base toward the cover.

In some embodiments, the side-stream pump includes an airflow channel communicating the inlet and the outlet, the airflow channel including: a first channel formed on the cover and extending in the circumferential direction of the cover, and/or a second channel formed on the base of the housing and extending in the circumferential direction of the base.

In some embodiments, a bottom of the first step extends to the second channel, and a top of the first step is adjacent to the inlet.

In some embodiments, the cover body is formed with a first channel extending along a circumferential direction, one end of the first channel is located at the inlet of the cover body, and the other end of the first channel extends to a first inclined plane, the first inclined plane is arranged opposite to the outlet of the housing, and the first inclined plane is inclined at an obtuse angle relative to the first channel.

In some embodiments, the base of the housing forms a circumferentially extending second channel, one end of the second channel abutting the outlet, the other end extending to a second bevel opposite the inlet of the cover, the second bevel being inclined at an obtuse angle relative to the second channel.

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

Drawings

Fig. 1 is a perspective assembly view of a side channel pump according to an embodiment of the present invention.

Fig. 2 is a partially exploded view of the side-stream pump shown in fig. 1.

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

Fig. 4 is a schematic view of the cap of the side-stream pump shown in fig. 1.

Fig. 5 is a schematic view of the structure of the housing of the side-stream pump shown in fig. 1.

Fig. 6 is a plan view schematically showing the cover and the housing of the side-flow pump shown in fig. 1 in an exploded state.

FIG. 7 is a schematic plan view of the side-stream pump of FIG. 1 at another angle.

Fig. 8 is a schematic view of a cross-section of the lumen of the side-stream pump shown in fig. 1.

Reference numerals: 100-side flow pump; 10-a cover body; 11-inlet; 12-a first channel; 13-a first incline; 14-a first interrupt zone; 15-grooves; 19-a first connection hole; 20-a housing; 201-a pump chamber; 21-sidewalls; 210-outlet; 211-lumen cross section; 212-a first inner edge; 213-a second inner edge; 214-a third inner edge; 22-a second channel; 221-gap; 23-an outlet section; 24-convex; 241-first step; 242-a second step; 26-a second interrupt zone; 27-a base; 271-a motor housing; 272-a base; 28-a second bevel; 29-a second connection hole; 30-impeller; 31-leaf; 32-mounting holes; 4-driving shaft; 5-a seal; 6, preparing a base material; a motor; a-axis of rotation; an alpha-first included angle; beta-second included angle.

Detailed Description

The following detailed description of the invention refers to the accompanying drawings and the detailed description of the invention, so that the technical scheme and the beneficial effects of the invention are more clear. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the invention, for which the dimensions are shown in the drawings for the purpose of clarity only and do not limit the true to scale.

Referring also to fig. 1 to 3, a side-stream pump 100 according to an embodiment of the present invention includes a cover 10 and a housing 20 connected to each other, and an impeller 30 accommodated in a pump chamber 201 defined by the cover 10 and the housing 20. The impeller 30 is rotatably supported by a drive shaft 4 disposed in the housing 20. Specifically, the impeller 30 is provided at the center thereof 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 the shaft of a motor 6; it will be appreciated that the drive shaft 4 may also be a separate shaft part in driving connection with the motor 6.

The housing 20 includes a base 27 and a sidewall 21. The side wall 21 is disposed around the base 27 and encloses a receiving space for receiving the impeller 30 together with the base 27. The cover 10 is provided at the top end of the side wall 21 to close the accommodating space, thereby forming the pump chamber 201. The cover 10 is provided with an inlet 11 for the flow of air into the pump chamber 201, the inlet 11 being arranged axially along the cover 10, preferably the inlet 11 being arranged offset from the centre of the cover 10. An outlet 210 is provided in the side wall 21 of the housing 20, the outlet 210 extending generally tangentially outwardly from the side wall 21, the outlet 210 being in communication with the pump chamber 201. The impeller 30 is housed within the pump chamber 201 and includes a plurality of radially outwardly extending vanes 31. When the impeller 30 rotates, the air flow enters the pump chamber 201 of the side flow channel pump 100 through the inlet 11 by the driving of the blades 31 thereof, flows along the pump chamber 201, and then is discharged from the outlet 210. Accordingly, in the rotation direction of the impeller 30, for example, in the angle shown in fig. 1 and 2, the rotation direction of the impeller 30 of the side-stream pump 100 is clockwise, and the inlet 11 is as far away from the outlet 210 as possible to increase the delivery power and pressure as much as possible.

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 motor housing 271 accommodates the stator, rotor, and other components of the motor 6.

Referring to fig. 3 and 4 together, the cover 10 is provided with a first generally arcuate channel 12 on a side facing the housing 20. The first channel 12 extends around the center of the cover 10. In this embodiment, the first channel 12 is substantially C-shaped and is recessed from the surface of the cover 10. The first channel 12 has one end located at the inlet 11 of the cover 10 and the other end extending to a first inclined surface 13 of the cover 10, said first inclined surface 13 being located opposite to the outlet 210 of the housing 20. Referring to fig. 3 and 5 together, in the present embodiment, the first inclined surface 13 extends obliquely toward the outlet 210 at an obtuse angle with respect to the first passage 12 to reduce pressure pulsation caused by air flow, thereby reducing noise.

Referring also to fig. 5, a 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 generally arcuate and extends around the center of the housing 20. In this embodiment, the radially outer periphery of the second channel 22 is located at the side wall 20. In this embodiment, the second channel 22 is also substantially C-shaped and recessed from the surface of the base 27 of the housing 20. Preferably, the first channel 12 of the cover 10 has a cross-sectional shape that is substantially the same as the cross-sectional shape of the second channel 22, and is substantially D-shaped. One end of the second channel 22 is connected to the outlet 210 by an outlet section 23. In this embodiment, the outlet section 23 extends in a straight line and has a substantially D-shaped cross section, but the cross section of the outlet section 23 is smaller than the cross section of the second channel 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 inlet 11 of the cover 10. The second inclined surface 28 extends obliquely toward the inlet 11 at an obtuse angle with respect to the second passage 22.

Referring also to fig. 6, a first interruption zone 14 is formed between the inlet 11 of the cover 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 zone 14 is flush with the top of the first incline 13 and the second interruption zone 26 is flush with the top of the second incline 28. In this embodiment, the first and second interruption zones 14, 26 are opposite each other. Preferably, the first and second interruption zones 14, 26 are parallel to each other. The arrangement of the first intermediate section 14 and the second interruption 26 is advantageous for preventing short-circuit flow of the air flow against the direction of rotation of the impeller 3.

The impeller 30 has a diameter smaller than the inner diameter of the sidewall 21 of the housing 20, so that a gap 221 is formed between the impeller 30 and the housing 20. The outer diameters of the first and second passages 12 and 22 are slightly larger than the outer diameter of the impeller 30, so that the first and second passages 12 and 22 communicate with both axial ends of the gap 221, respectively.

Referring to fig. 2, 7 and 8 together, the outlet 210 of the housing 20 is non-circular along an interior chamber section 211 perpendicular to the direction of airflow. In this embodiment, the lumen cross-section 211 is configured in a generally V-shape. To make it possible to more clearly understand the shape of the lumen cross-section 211, fig. 8 shows the angular relationship of the lumen cross-section 211. The inner cavity section 211 is surrounded by a first inner edge 212, a second inner edge 213 and a third inner edge 214 which are connected end to end in the circumferential direction. The first inner edge 212 and the second inner edge 213 are substantially V-shaped, which is open toward the radially outer side of the housing 20. The first inner edge 212 extends obliquely in a first direction from adjacent the cover 1 towards the base 27, and forms a first angle α with the rotation axis a of the impeller 30, the angle α being in the range 0< α <90 °. The second inner edge 213 extends obliquely from the end of the first inner edge 212 toward the base 27 in a second direction opposite to the first direction, and forms a second angle β with the rotation axis a of the impeller 30, the angle β being in the range of 0< β <90 °. Preferably, α=45°, β=45°. The third inner edge 214 is a substantially circular arc segment connected to the separated ends of the first inner edge 212 and the second inner edge 213. The design can reduce pressure pulsation caused by air flow and noise.

Referring to fig. 2 and 5 together, further, the inner wall of the side wall 21 of the housing 20 is provided with a convex portion 24 protruding radially inward, so that a first step 241 and a second step 242 are formed on both circumferential sides of the convex portion 24, respectively. The boss 24 is disposed 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 upstream of the inlet 11 (i.e., forward of the inlet 11 in the direction of rotation of the impeller 30). The second step 242 is located adjacent to the outlet 210 downstream of the outlet 210 (i.e., rearward of the outlet 210 in the direction of rotation of the impeller 30). The first step 241 and the second step 242 are each disposed obliquely with respect to the rotation axis a of the impeller 30, and extend obliquely toward each other from the base 27 toward the cover 10, so that the bottom of the projection 24 is longer along the side wall 21 than the top. The provision of the boss 24 can further reduce pressure pulsation caused by the air flow, thereby improving aerodynamic audio noise.

Fig. 6 shows an 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 to more clearly show the correspondence of the positions therebetween. Referring to fig. 5 and 6 together, in the present embodiment, the bottom of the first step 241 extends circumferentially beyond the second inclined surface 28 of the housing 20 to the second passage 22. The top of the first step 241 is located directly above the second inclined surface 28. The bottom of the second step 242 abuts the inside of the outlet section 23 of the housing 20. Preferably, the second step 242 extends up to the top of the side wall 21 of the housing 20 at an oblique angle tangential to the inside of the outlet section 23.

Referring to fig. 2, further, in the present embodiment, the cover 10 is provided with a plurality of first connection holes 19 at its outer edge, and the housing 20 is correspondingly provided with a plurality of second connection holes 29. The fastener may pass through the corresponding first and second connection holes 19 and 29 to fixedly connect the cover 10 to the housing 20. Referring to fig. 3, the cover 10 is provided with a circumferentially extending groove 15 radially outwardly of its first passage 12 for securing the seal 5 so that a seal is formed between the cover 10 and the housing 20. Furthermore, preferably, the abutment of each of the regions is of rounded design.

The side-stream pump provided by the present invention reduces pressure pulsation caused by air flow by the non-circular lumen cross section 211 and/or the sloped first step 241 located upstream of the inlet 11 and/or the sloped second step 242 located downstream of the outlet 210, thereby effectively reducing noise.

The above description is merely of a preferred embodiment of the present invention, the protection scope of the present invention is not limited to the above-listed examples, and any simple changes or equivalent substitutions of the technical solutions that can be obviously obtained by those skilled in the art within the technical scope of the present invention disclosed in the present invention fall within the protection scope of the present invention.

Claims

1. A side-stream pump comprising a housing (20) and a cover (10) connected to each other, and an impeller (30) accommodated in a pump chamber (201) formed by the cover (10) and the housing (20), the impeller (30) being rotatably supported in the pump chamber (201), the cover (10) being provided with an inlet (11), the housing (20) comprising a base (27) and a side wall (21), the side wall (21) being provided with a substantially tangential outlet (210) in fluid communication with the inlet (11), characterized in that the outlet (210) is non-circular in an inner chamber section (211) perpendicular to the direction of flow of the air stream, the inner chamber section (211) being formed by circumferentially joining first inner edges (212), second inner edges (213) and third inner edges (214) in sequence, the first inner edges (212) and the second inner edges (213) being substantially V-shaped, the first inner edges (212) forming an angle α <90 ° with a first axis of rotation (a) of the impeller (30).

2. Side stream pump according to claim 1, characterized in that the V-shape opens towards the radially outer side of the housing (20).

3. Side stream pump according to claim 1, characterized in that the second inner edge (213) forms a second angle β with the rotation axis (a) of the impeller (30), the angle β being in the range 0< β <90 °.

4. Side stream pump according to claim 1, characterized in that the side wall (21) of the housing (20) is provided on its inner side with a radially inwardly protruding projection (24), which projection (24) is located downstream of the outlet (210) and upstream of the inlet (11) in the direction of flow of the gas stream.

5. The side-flow pump according to claim 4, wherein the convex portion (24) forms a first step (241) and a second step (242) on both sides in the circumferential direction, respectively, the first step (241) being adjacent to the inlet (11), the second step (242) being adjacent to the outlet (210), the first step (241) and the second step (242) extending obliquely toward each other in the direction of the base (27) toward the cover (10).

6. The side-stream pump according to claim 5, comprising an air flow channel communicating the inlet (11) and the outlet (210), the air flow channel comprising: a first channel (12) formed on the cover (10) and extending in the circumferential direction of the cover (10), and/or a second channel (22) formed on the base (27) of the housing (20) and extending in the circumferential direction of the base (27).

7. The side stream pump according to claim 6, characterized in that the bottom of the first step (241) extends to the second channel (22), the top of the first step (241) being adjacent to the inlet (11).

8. Side-stream pump according to any of claims 1 or 4, characterized in that the cover (10) is formed with a first channel (12) extending in circumferential direction, one end of the first channel (12) being located at the inlet (11) of the cover (10) and the other end extending to a first inclined surface (13), the first inclined surface (13) being arranged opposite the outlet (210) of the housing (20), the first inclined surface (13) being inclined at an obtuse angle with respect to the first channel (12).

9. The side-stream pump according to claim 1 or 4, characterized in that the base (27) of the housing (20) forms a second channel (22) extending in circumferential direction, one end of the second channel (22) adjoining the outlet (210) and the other end extending to a second inclined surface (28), the second inclined surface (28) being opposite the inlet (11) of the cover (10), the second inclined surface (28) being inclined at an obtuse angle with respect to the second channel (22).