WO2023236011A1

WO2023236011A1 - Side channel pump

Info

Publication number: WO2023236011A1
Application number: PCT/CN2022/097162
Authority: WO
Inventors: 陈安邦; 刘晓宇; 王春启; 曲涛; 王海涛; 秦锐锋
Original assignee: 广东德昌电机有限公司
Priority date: 2022-06-06
Filing date: 2022-06-06
Publication date: 2023-12-14

Abstract

A side channel pump (100), comprising a pump casing (10) and an impeller (30). The pump casing (10) comprises a substrate (121), a side plate (122) arranged around the substrate (121), and a cover plate (14) covering the side plate (122), the cover plate (14) being provided with an inlet (18), the side plate (122) being provided with an outlet (19), the substrate (121) being recessed to form a first channel (126), a first partition portion (127) partitioning two ends of the first channel (126), the cover plate (14) being recessed to form a second channel (145), and a first groove (148) being formed in one side of a second partition portion (147) away from the inlet (18). The side channel pump can reduce pressure pulsation caused by fluid pressure impact, thus effectively reducing aerodynamic audio noise.

Description

Side channel pump

Technical field

This application relates to the technical field of power equipment, and in particular to a side channel pump.

Background technique

The side channel pump has an ultra-low specific speed. Compared with traditional centrifugal pumps when generating the same pumping flow rate, it has the characteristics of smaller size, lower speed, and lower noise. It is widely used in industrial production and daily life.

In the field of new energy vehicles, side channel pumps are commonly used in cleaning devices for vehicle-mounted sensors, such as cameras and radar probes. However, in order to obtain the best possible delivery or high pressure, pulses will be formed due to sudden pressure shocks of the transported fluid, which will generate high pneumatic audio noise and affect the user experience.

technical problem

In view of this, this application aims to provide a side channel pump that can effectively reduce noise.

Technical solutions

A side channel pump, the side channel pump is characterized by including a pump casing and an impeller rotatably disposed in the pump casing, the pump casing including a base plate, side plates arranged around the base plate and a cover A cover plate is provided on the side plate, the cover plate is provided with an inlet, and the side plate is provided with an outlet. The base plate is recessed on its side facing the cover plate to form a first flow channel, and the first flow channel One end faces the inlet and the other end communicates with the outlet. The side plate protrudes inward to form a first partition. The first partition separates both ends of the first flow channel. The cover The plate is recessed on its side facing the base plate to form a second flow channel. One end of the second flow channel is connected to the inlet and the other end is facing the outlet. In the axial direction, the first flow channel and the The second flow channels are opposite to each other and are located on opposite sides of the impeller. The cover plate forms a second partition between two ends of the second flow channel. The second partition is located away from the A first groove is formed on one side of the inlet. Along the rotation direction of the impeller, the first groove is located downstream of the outlet and communicates with the second flow channel.

beneficial effects

The side channel pump provided by this application can reduce pressure pulsation caused by fluid pressure impact through the setting of the first groove, effectively reduce aerodynamic audio noise, form a better mute effect, and effectively improve user experience.

Description of the drawings

Figure 1 is a perspective view of an embodiment of the side channel pump of the present application.

FIG. 2 is a plan view of the side channel pump shown in FIG. 1 .

FIG. 3 is a cross-sectional view along line III-III of FIG. 2 .

FIG. 4 is an exploded view of the side channel pump shown in FIG. 1 .

Figure 5 is an exploded view of the side channel pump shown in Figure 1 from another angle.

FIG. 6 is a plan view of the cover plate of the side channel pump shown in FIG. 5 .

FIG. 7 is a plan view of the base of the side channel pump shown in FIG. 4 .

Embodiments of the invention

In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. One or more embodiments of the present application are exemplarily provided in the drawings to enable a more accurate and thorough understanding of the technical solutions disclosed in the present application. However, it should be understood that the present application can be implemented in many different forms and is not limited to the embodiments described below.

The same or similar numbers in the drawings of this application correspond to the same or similar components; in the description of this application, it should be understood that if there are terms such as "upper", "lower", "left", "right" etc. indicating The orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be configured in a specific orientation, and Operation, therefore, the terms describing positional relationships in the drawings are only for illustrative purposes and cannot be understood as limitations of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

In addition, if there are descriptions involving “first”, “second”, etc. in the embodiments of this application, the descriptions of “first”, “second”, etc. are only for descriptive purposes and shall not be understood as indications or implications. Its relative importance or implicit indication of the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, if "and/or" or "and/or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and/or B" as an example, it includes solution A, or solution B, or solution A and A solution that satisfies B at the same time.

In addition, the technical solutions in various embodiments can be combined with each other, but it must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that such a combination of technical solutions does not exist. , nor is it within the scope of protection required by this application.

This application provides a side channel pump for driving fluid, such as water, refrigerant, air, etc. Figures 1-7 show a specific embodiment of the side channel pump of the present application. The side channel pump 100 shown includes a pump casing 10 and an impeller 30 disposed in the pump casing 10.

As shown in FIGS. 4 and 5 , the pump housing 10 is composed of a detachably connected base 12 and a cover 14 to facilitate the assembly of the impeller 30 . The base body 12 is barrel-shaped as a whole and includes a base plate 121 and a side plate 122 integrally extending from the outer edge of the base plate 121 . The side plates 122 are arranged around the base plate 121 , and they together form a pump chamber 16 in which the impeller 30 is installed. The cover plate 14 covers the top end of the side plate 122 (that is, the end away from the base plate 121) to seal the pump chamber 16. In the illustrated embodiment, the cover 14 extends radially outward to form a plurality of lugs 141 , and each lug 141 is provided with a fixing hole 143 ; correspondingly, the side plate 122 extends radially outward to form a plurality of lugs 141 . Each lug 123 is provided with a fixing hole 124. Fasteners such as screws are inserted into the fixing holes 143 and 124 to connect the cover plate 14 and the side plate 122 together. Preferably, a sealing member, such as a sealing ring, is provided between the cover plate 14 and the side plate 122 so that the fluid There are no leaks in the pump chamber 16.

The pump housing 10 is provided with an inlet 18 and an outlet 19. The inlet 18 and the outlet 19 are perpendicular to each other and spaced apart from each other, and are connected to each other through the pump chamber 16. In the illustrated embodiment, the inlet 18 is provided on the cover plate 14 as a passage for fluid to flow into the pump chamber 16; the outlet 19 is provided on the side plate 122 as a passage for fluid to flow out of the pump chamber 16; the impeller 30 is rotatably provided on the pump. In the cavity 16, the pushing fluid flows from the inlet 18 to the outlet 19. Preferably, the inlet 18 is disposed close to the outer edge of the cover plate 14 , and the axis of the inlet 18 is parallel to the rotation axis of the impeller 30 , so that when the fluid enters the pump chamber 16 , it flows toward the outer edge of the impeller 30 rather than toward the center of the impeller 30 . The outlet 19 extends outward from the side plate 122 , and its axial direction is generally consistent with the tangential direction of the side plate 122 and is generally perpendicular to the rotation axis of the impeller 30 .

The impeller 30 is a disc-shaped structure as a whole, including a hub 32 and a plurality of blades 34 extending radially from the outer edge of the hub 32 . The outer diameter of the impeller 30 is slightly smaller than the diameter of the pump chamber 16, so that a small gap 36 is formed between the end of the blade 34 and the inner circumferential surface of the side plate 122, thereby preventing the blade 34 from interfering with the pump casing 10 during rotation, and also As a flow channel for fluid in the pump chamber 16. During the rotation of the blades 34, the fluid introduced into the pump chamber 16 from the inlet 18 is pushed to flow toward the outlet 19, and the fluid is accelerated and pressurized during the subsequent flow. Along the rotation direction of the impeller 30, the inlet 18 and the outlet 19 are far away from each other, so that the fluid has a flow channel as long as possible in the pump chamber 16 to maximize the delivery power and pressure. In the direction shown in Figure 2, the impeller 30 rotates counterclockwise, and the central angle corresponding to the circumferential distance between the inlet 18 and the outlet 19 is not less than 300 degrees.

A connection hole 38 is formed in the center of the hub 32 for connection with a power component (not shown), such as a motor. Preferably, power components such as motors are arranged outside the pump chamber 16 to prevent the fluid from affecting the electrical safety of the motors and the like. A through hole 125 is provided in the center of the base plate 121 of the base body 12. The through hole 125 is located opposite the connecting hole 38 for passing the shaft 20 to connect the impeller 30 and the motor. In one embodiment, the motor is directly connected to the impeller 30, and the shaft 20 can be the output shaft of the motor itself; in one embodiment, the motor is indirectly connected to the impeller 30, and the shaft 20 can be drivingly connected to the output shaft of the motor. Separate shaft components. Preferably, the cross section of the connecting hole 38 of the hub 32 is D-shaped; correspondingly, the cross section of the end connecting the shaft 20 and the hub 32 is D-shaped. When the shaft 20 is inserted into the connecting hole 38, the hub 32 and the shaft 20 automatically form a limit in the circumferential direction, so that the shaft 20 can drive the impeller 30 to rotate synchronously.

As shown in FIGS. 4 and 7 , the outer edge of the base plate 121 of the base 12 is recessed on its inner side (that is, the side facing the cover 14 ) to form a first flow channel 126 . The first flow channel 126 is generally C-shaped and surrounds the base plate 121 . The center of the pump housing 10 extends, with its first end facing the inlet 18 of the cover plate 14 and its rear end connected to the outlet 19 of the side plate 122 . As shown in Figures 5 and 6, the outer edge of the cover plate 14 is recessed on its inner side (that is, the side facing the base plate 121) to form a second flow channel 145. The second flow channel 145 is generally C-shaped and surrounds the pump housing. The center of 10 extends, its first end is connected with the entrance 18, and its tail end is facing the exit 19. In the axial direction, the first flow channel 126 and the second flow channel 145 are opposite to each other and located on opposite sides of the blade 34 respectively; in the radial direction, the first flow channel 126 and the second flow channel 145 completely cover the space between the blade 34 and the side plate 122 The gaps 36 (see Figure 3) are connected with each other to form a flow channel for the fluid in the pump chamber 16.

As shown in FIGS. 4 and 7 , the radially outer edge of the first flow channel 126 sinks into the side plate 122 to a certain depth, so that the portion of the side plate 122 that is offset from the first flow channel 126 is relative to the portion of the side plate 122 facing the first flow channel 126 Protruding, a first partition 127 is formed between the two ends of the first flow channel 126 (that is, located behind the head end of the first flow channel 126 and in front of the tail end in the rotation direction of the impeller 30). The first partition 127 is formed between both ends of the first flow channel 126. 127 blocks both ends of the first flow channel 126 to block the fluid entering the pump chamber 16 and prevent the fluid from flowing in the direction of rotation of the impeller 30 . A recess 128 is formed on the inside of the top end of the side plate 122. The recess 128 extends to a certain length in the circumferential direction of the side plate 122 and extends from the upstream of the outlet 19 to the first partition 127 in the rotation direction of the impeller 30. Its axial depth gradually decreases, which can reduce the pressure pulsation caused by fluid pressure impact, thereby effectively reducing aerodynamic audio noise.

A first inclined surface 1271 and a second inclined surface 1272 are respectively formed on both circumferential sides of the first partition 127 . The first inclined surface 1271 and the second inclined surface 1272 are inclined relative to the axial direction of the pump housing 10 , wherein the first inclined surface 1271 is adjacent to the second inclined surface 1271 . The head end of the first flow channel 126 is located upstream of the first flow channel 126 (that is, located in front of the first flow channel 126 in the rotation direction of the impeller 30 ). The second inclined surface 1272 is adjacent to the outlet 19 and located downstream of the outlet 19 (that is, in the direction of rotation of the impeller 30 is located behind exit 19 in the direction of rotation). Preferably, the first inclined surface 1271 and the second inclined surface 1272 are in an "eight" shape as a whole, with their side ends facing the cover plate 14 close to each other and their side ends facing the base plate 121 away from each other, which can further reduce the risk of damage caused by fluid pressure impact. Pressure pulsations. Preferably, the tail end of the recess 128 spans the second inclined surface 1272, and the groove bottom of the recess 128 and the second inclined surface 1272 form an included angle of less than 90 degrees.

Preferably, the first end of the first flow channel 126 is formed with a guide surface 129 facing the inlet 18. The guide surface 129 is inclined relative to the axial direction of the inlet 18 and the base plate 121, such as to form an angle of about 135 degrees with the base plate 121. The angle is 45 degrees with the axial direction of the inlet 18 , so that the fluid flowing into the pump chamber 16 from the inlet 18 can be redirected to flow substantially parallel to the base plate 121 under the guidance of the guide surface 129 .

As shown in FIGS. 5 and 6 , the portion of the cover plate 14 between the two ends of the second flow channel 145 protrudes outward relative to the cover plate 14 where the second flow channel 145 is formed, so that the portion of the second flow channel 145 is formed. A second partition 147 is formed between the two ends, which also blocks the fluid entering the pump chamber 16 and prevents the fluid from flowing in the opposite direction of rotation of the impeller 30 . Wherein, a first groove 148 and a second groove 149 are respectively formed on both circumferential sides of the second partition 147 , wherein the first groove 148 is located downstream of the second flow channel 145 and the second groove 149 is located on the second flow channel 145 . Upstream of flow channel 145. Both the first groove 148 and the second groove 149 can reduce pressure pulsation caused by fluid pressure impact, thereby effectively reducing aerodynamic audio noise.

In the illustrated embodiment, the depth of the first groove 148 in the axial direction is much smaller than the depth of the second flow channel 145 , and the width in the radial direction is much smaller than the width of the second flow channel 145 . A transition section 146 is formed at the rear end of the second flow channel 145. Along the rotation direction of the impeller 30, the axial depth and radial width of the transition section 146 gradually decrease, so that the distance between the first groove 148 and the second flow channel 145 is reduced gradually. The connection position is smoother. Since the rear end of the second flow channel 145 is facing the outlet 19, it can be understood that the first groove 148 is located downstream of the outlet 19, the second groove 149 is adjacent to the head end of the second flow channel 145, and the second groove 149 is in the axial direction. The depth on the second flow channel 145 is smaller than that of the second flow channel 145 .

When the side channel pump 100 of the present application is working, the impeller 30 rotates at high speed under the action of the driving element to form a negative pressure in the pump chamber 16. The external fluid is sucked into the pump chamber 16 through the inlet 18. Under the push of the impeller 30 The flow channel along the first flow channel 126 , the second flow channel 145 and the gap 36 flows in the pump chamber 16 and is accelerated and pressurized, and finally flows out of the pump housing 10 through the outlet 19 . During the flow of fluid in the pump chamber 16, the pressure pulsation caused by the pressure impact can be caused by the structures at both ends of the flow channel, including the first groove 148, and/or the second groove 149, and/or the depression 128, etc. Buffering can effectively reduce the pneumatic audio noise caused by pressure pulses, so that the side channel pump 100 of the present application can have a better mute effect during operation and effectively improve the user experience.

The above are only preferred specific embodiments of the present application. The protection scope of the present application is not limited to the above-listed embodiments. Any person familiar with the technical field can obviously obtain the technology within the technical scope disclosed in the present application. Simple changes or equivalent substitutions of the scheme fall within the protection scope of this application.

Claims

A side flow channel pump, characterized in that it includes a pump casing and an impeller rotatably disposed in the pump casing. The pump casing includes a base plate, a side plate arranged around the base plate, and a cover provided on the side plate. A cover plate on the board, the cover plate is provided with an inlet, and the side plate is provided with an outlet. The base plate is recessed to form a first flow channel on its side facing the cover plate. One end of the first flow channel faces the The inlet and the other end are connected with the outlet, the side plate is protruded inward to form a first partition, the first partition separates both ends of the first flow channel, and the cover plate faces the The side surface of the substrate is recessed to form a second flow channel. One end of the second flow channel is connected to the inlet and the other end is facing the outlet. In the axial direction, the first flow channel and the second flow channel are Opposite to each other and located on opposite sides of the impeller, the cover plate forms a second partition between two ends of the second flow channel, and the second partition is on a side away from the inlet. A first groove is formed. Along the rotation direction of the impeller, the first groove is located downstream of the outlet and communicates with the second flow channel.
The side channel pump of claim 1, wherein the second partition forms a second groove on a side close to the inlet, and the second groove and the second flow channel respectively Located on opposite sides of said entrance.
The side flow channel pump according to claim 1, wherein the axial depth and radial width of the first groove are smaller than the second flow channel, and the tail end of the second flow channel forms a transition part.
The side channel pump according to claim 1, wherein a depression is formed on the inside of the side plate, and the depression includes a circumferentially opposite head end and a tail end along the impeller rotation direction, wherein the tail end is located at the Upstream of the outlet, the tail end extends to the first partition.
The side channel pump according to claim 4, wherein the axial depth of the recess gradually decreases along the rotation direction of the impeller.
The side flow channel pump according to claim 4, wherein a first inclined surface and a second inclined surface are respectively formed on both sides of the circumferential direction of the first partition, and the first inclined surface and the second inclined surface face the cover. The side ends of the plates are close to each other, and the side ends facing the base plate are far away from each other, forming an "eight" shape as a whole.
The side channel pump of claim 6, wherein the second inclined surface faces the outlet, and the rear end of the depression spans the second inclined surface.
The side flow channel pump according to claim 1, wherein the first flow channel forms a guide surface at one end facing the inlet, and the angle between the guide surface and the base plate is an obtuse angle.