Side runner pump

Abstract

A side flow channel pump (100) comprises a pump shell (10) and an impeller (30), the pump shell (10) comprises a base plate (121), a side plate (122) arranged around the base plate (121) and a cover plate (14) arranged on the side plate (122) in a covering mode, the cover plate (14) is provided with an inlet (18), the side plate (122) is provided with an outlet (19), the base plate (121) is sunken to form a first flow channel (126), a first partition part (127) partitions the two ends of the first flow channel (126), the cover plate (14) is sunken to form a second flow channel (145), and the first partition part (127) partitions the two ends of the second flow channel (145). The second partition (147) forms a first groove (148) on its side remote from the inlet (18). According to the side runner pump, pressure pulsation caused by fluid pressure impact can be reduced, and pneumatic audio noise is effectively reduced.

Description

Side channel pump Technical Field

[0001] The present application relates to the technical field of power equipment, and in particular to a side channel pump. Background Art

[0002] Side channel pumps have an ultra-low specific speed. Compared with traditional centrifugal pumps, they have the advantages of small size, low speed and low noise when producing the same pumping flow. They are widely used in industrial production and daily life.

[0003] In the new energy vehicle sector, side channel pumps are often used in cleaning systems for onboard sensors, such as cameras and radar probes. However, in order to achieve optimal delivery and high pressure, sudden pressure surges in the pumped fluid can cause pulses, resulting in high aerodynamic audible noise and impacting the user experience. Technical issues

[0004] In view of this, the present application aims to provide a side channel pump that can effectively reduce noise. Technical Solutions

[0005] A side channel pump, characterized in that it includes a pump casing and an impeller rotatably arranged in the pump casing, the pump casing including a base plate, a side plate arranged around the base plate and a cover plate covering the side plate, the cover plate being provided with an inlet and the side plate being provided with an outlet, the base plate being recessed on a side facing the cover plate to form a first flow channel, one end of the first flow channel facing the inlet and the other end communicating with the outlet, the side plate being protruding inward to form a first partition, the first partition separating the two ends of the first flow channel, the cover plate being recessed on a side facing the base plate to form a second flow channel, one end of the second flow channel communicating with the inlet and the other end facing the outlet, axially, the first flow channel and the second flow channel are opposite to each other and respectively located on opposite sides of the impeller, the cover plate forming a second partition between the two ends of the second flow channel, the second partition forming a first groove on a side away from the inlet, and 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

[0006] The side channel pump provided in the present application can reduce the pressure pulsation caused by fluid pressure shock through the setting of the first groove, effectively reduce pneumatic audio noise, form a better silent effect, and effectively improve user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] FIG1 is a perspective view of an embodiment of a side channel pump of the present application.

[0008] FIG2 is a plan view of the side channel pump shown in FIG1.

[0009] FIG3 is a cross-sectional view taken along line III-III of FIG2 .

[0010] FIG4 is an exploded view of the side channel pump shown in FIG1 .

[0011] FIG5 is an exploded view of the side channel pump shown in FIG1 from another angle.

[0012] 6 is a plan view of the cover plate of the side channel pump shown in FIG. 5 .

[0013] 7 is a plan view of the seat body of the side channel pump shown in FIG. 4 . Modes for Carrying Out the Invention

[0014] To facilitate understanding of the present application, a more comprehensive description of the present application will be provided below with reference to the accompanying drawings. The accompanying drawings provide exemplary embodiments of the present application to provide a more accurate and thorough understanding of the technical solutions disclosed herein. However, it should be understood that the present application can be implemented in a variety of different forms and is not limited to the embodiments described below.

[0015] The same or similar numbers in the drawings of this application correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0016] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, scheme B, or schemes in which A and B are satisfied at the same time.

[0017] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0018] The present application provides a side channel pump for driving fluids such as water, refrigerant, air, etc. FIG. 1-7 show a specific embodiment of the side channel pump of the present application, wherein the side channel pump 100 includes a pump housing 10 and an impeller 30 disposed in the pump housing 10 .

[0019] As shown in Figures 4 and 5, the pump housing 10 is composed of a detachably connected base body 12 and a cover plate 14, which facilitates the assembly of the impeller 30. The base body 12 is barrel-shaped as a whole, including a base plate 121 and a side plate 122 extending integrally from the outer edge of the base plate 121. The side plate 122 is arranged around the base plate 121, and the two together form a pump chamber 16 for mounting the impeller 30. The cover plate 14 covers the top end of the side plate 122 (i.e., the end away from the base plate 121) to close the pump chamber 16. In the illustrated embodiment, the cover plate 14 extends radially outward to form a plurality of lugs 141, each of which is provided with a fixing hole 143; correspondingly, the side plate 122 extends radially outward to form a plurality of lugs 123, each of which is provided with a fixing hole 124. Screws and other fixing parts are passed through the fixing holes 143 and 124 to connect the cover plate 14 and the side plate 122 together. Preferably, a seal, such as a sealing ring, is provided between the cover plate 14 and the side plate 122 to prevent the fluid from leaking in the pump chamber 16.

[0020] The pump housing 10 is provided with an inlet 18 and an outlet 19. The inlet 18 and outlet 19 are perpendicular to each other and spaced apart from each other, interconnected through the pump chamber 16. In the illustrated embodiment, the inlet 18 is provided on the cover plate 14 and serves as a passage for fluid to flow into the pump chamber 16; the outlet 19 is provided on the side plate 122 and serves as a passage for fluid to flow out of the pump chamber 16. The impeller 30 is rotatably disposed in the pump chamber 16, pushing the fluid from the inlet 18 to the outlet 19. Preferably, the inlet 18 is provided near the outer edge of the cover plate 14, with the axis of the inlet 18 parallel to the rotational axis of the impeller 30. This ensures that upon entering the pump chamber 16, the fluid 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, with its axial direction generally aligned with the tangent direction of the side plate 122 and generally perpendicular to the rotational axis of the impeller 30.

[0021] The impeller 30 is generally disc-shaped, comprising 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, creating a small gap 36 between the tips of the blades 34 and the inner circumference of the side plate 122. This prevents the blades 34 from interfering with the pump casing 10 during rotation and also serves as a flow path for the fluid within the pump chamber 16. As the blades 34 rotate, they propel the fluid entering the pump chamber 16 from the inlet 18 toward the outlet 19, accelerating and pressurizing the fluid as it flows. Along the direction of rotation of the impeller 30, the inlet 18 and outlet 19 are spaced apart, ensuring the longest possible flow path for the fluid within the pump chamber 16, maximizing pumping power and pressure. As shown in Figure 2, the impeller 30 rotates counterclockwise, with the circumferential spacing between the inlet 18 and outlet 19 corresponding to a central angle of no less than 300 degrees.

[0022] A connection hole 38 is formed in the center of the hub 32 for connecting to a power element (not shown), such as a motor. Preferably, the motor and other power elements are located outside the pump chamber 16 to prevent fluid from affecting the electrical safety of the motor. A through-hole 125 is provided in the center of the base plate 121 of the base body 12. This through-hole 125 is located directly opposite the connection hole 38 and is used to pass the shaft 20 through to connect the impeller 30 and the motor. In one embodiment, the motor and impeller 30 are directly connected, and the shaft 20 can be the output shaft of the motor itself. In another embodiment, the motor and impeller 30 are indirectly connected, and the shaft 20 can be a separate shaft component that is drivingly connected to the output shaft of the motor. Preferably, the connection hole 38 of the hub 32 has a D-shaped cross-section; accordingly, the cross-section of the shaft 20 at the end connected to the hub 32 also has a D-shaped cross-section. When the shaft 20 is inserted into the connection hole 38, the hub 32 and the shaft 20 automatically form a circumferential limit, allowing the shaft 20 to drive the impeller 30 to rotate synchronously.

[0023] As shown in Figures 4 and 7 , the base plate 121 of the base body 12 has a recessed outer edge on its inner side (i.e., the side facing the cover plate 14) to form a first flow channel 126. First flow channel 126 is generally C-shaped, extending around the center of the pump housing 10, with its head end facing the inlet 18 of the cover plate 14 and its tail end connected to the outlet 19 of the side plate 122. As shown in Figures 5 and 6 , the cover plate 14 has a recessed outer edge on its inner side (i.e., the side facing the base plate 121) to form a second flow channel 145. Second flow channel 145 is generally C-shaped, extending around the center of the pump housing 10, with its head end connected to the inlet 18 and its tail end facing the outlet 19. Axially, first flow channel 126 and second flow channel 145 oppose each other and are located on opposite sides of the blades 34. Radially, first flow channel 126 and second flow channel 145 completely cover the gap 36 (see Figure 3) between the blades 34 and the side plate 122, interconnecting to form a flow path for the fluid within the pump chamber 16.

[0024] As shown in Figures 4 and 7 , the radial outer edge of the first flow channel 126 is sunken into the side plate 122 to a certain depth, causing the portion of the side plate 122 offset from the first flow channel 126 to protrude relative to the portion of the side plate 122 directly facing the first flow channel 126. This forms a first partition 127 between the two ends of the first flow channel 126 (i.e., located behind the head end and in front of the tail end of the first flow channel 126 in the direction of rotation of the impeller 30). The first partition 127 separates the two ends of the first flow channel 126, blocking the fluid entering the pump chamber 16 and preventing it from flowing against the direction of rotation of the impeller 30. A recess 128 is formed on the inner side of the top end of the side plate 122. The recess 128 extends a certain length around the circumference of the side plate 122, extending from upstream of the outlet 19 in the direction of rotation of the impeller 30 to the first partition 127, with its axial depth gradually decreasing. This reduces pressure pulsation caused by fluid pressure shock, thereby effectively reducing aerodynamic audible noise.

[0025] A first inclined surface 1271 and a second inclined surface 1272 are formed on either side of the first partition 127 in the circumferential direction. The first inclined surface 1271 and the second inclined surface 1272 are arranged at an angle relative to the axial direction of the pump casing 10. The first inclined surface 1271 is adjacent to the head end of the first flow channel 126 and is located upstream of the first flow channel 126 (i.e., in front of the first flow channel 126 in the direction of rotation of the impeller 30), and the second inclined surface 1272 is adjacent to the outlet 19 and is located downstream of the outlet 19 (i.e., behind the outlet 19 in the direction of rotation of the impeller 30). Preferably, the first inclined surface 1271 and the second inclined surface 1272 are generally shaped like a figure eight, with their ends facing the cover plate 14 being closer to each other and their ends facing the base plate 121 being farther apart, thereby further reducing pressure pulsations caused by fluid pressure shocks. Preferably, the tail end of the recess 128 crosses the second inclined surface 1272 , and the bottom of the recess 128 and the second inclined surface 1272 form an angle smaller than 90 degrees.

[0026] Preferably, a guide surface 129 is formed at the head end of the first flow channel 126, which is directly opposite to the inlet 18. The guide surface 129 is inclined relative to the axial direction of the inlet 18 and the substrate 121, such as forming an angle of about 135 degrees with the substrate 121 and an angle of 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 roughly parallel to the substrate 121 under the guidance of the guide surface 129.

[0027] As shown in Figures 5 and 6, the portion of the cover plate 14 between the two ends of the second flow channel 145 forms a portion of the second flow channel 145 that protrudes outward relative to the cover plate 14, thereby forming a second partition 147 between the two ends of the second flow channel 145. This also blocks the fluid entering the pump chamber 16, preventing the fluid from flowing against the direction of rotation of the impeller 30. A first groove 148 and a second groove 149 are formed on either side of the circumference of the second partition 147, respectively. The first groove 148 is located downstream of the second flow channel 145, and the second groove 149 is located upstream of the second flow channel 145. Both the first groove 148 and the second groove 149 can reduce pressure pulsation caused by fluid pressure shock, thereby effectively reducing aerodynamic audible noise.

[0028] In the illustrated embodiment, the axial depth of the first groove 148 is much smaller than the depth of the second flow channel 145, and the radial width is much smaller than the width of the second flow channel 145. The tail end of the second flow channel 145 forms a transition section 146. The axial depth and radial width of the transition section 146 gradually decrease along the rotation direction of the impeller 30, resulting in a smoother connection between the first groove 148 and the second flow channel 145. Since the tail end of the second flow channel 145 directly faces the outlet 19, it can be understood that the first groove 148 is located downstream of the outlet 19, while the second groove 149 is adjacent to the head end of the second flow channel 145 and has a smaller axial depth than the second flow channel 145.

[0029] When the side channel pump 100 of the present application is in operation, the impeller 30 rotates at high speed under the action of the driving element, forming a negative pressure in the pump chamber 16. The external fluid is sucked into the pump chamber 16 through the inlet 18, and under the push of the impeller 30, flows along the flow channel formed by the first flow channel 126, the second flow channel 145 and the gap 36 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 shock can be buffered 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., which can effectively reduce the pneumatic audio noise formed by the pressure pulse, so that the side channel pump 100 of the present application can have a better silent effect during operation, effectively improving the user experience.

[0030] The above description is only a preferred specific implementation method of the present application. The scope of protection of the present application is not limited to the embodiments listed above. Any simple changes or equivalent replacements of the technical solutions that can be obviously obtained by any technician familiar with this technical field within the technical scope disclosed in this application fall within the scope of protection of the present application.

Claims

1. A side channel pump, characterized in that: The pump casing comprises a pump casing and an impeller rotatably arranged in the pump casing, the pump casing comprising a base plate, a side plate arranged around the base plate, and a cover plate covering the side plate, the cover plate being provided with an inlet and the side plate being provided with an outlet, the base plate being recessed on a side surface facing the cover plate to form a first flow channel, one end of the first flow channel facing the inlet and the other end communicating with the outlet, the side plate being protruded inwardly to form a first partition, the first partition separating the two ends of the first flow channel, the cover plate being recessed on a side surface facing the base plate to form a second flow channel, one end of the second flow channel communicating with the inlet and the other end facing the outlet, axially, the first flow channel and the second flow channel are opposite to each other and respectively located on opposite sides of the impeller, the cover plate forming a second partition between the two ends of the second flow channel, the second partition forming a first groove on a side away from the inlet, and in the rotation direction of the impeller, the first groove is located downstream of the outlet and communicates with the second flow channel.

2. The side channel pump according to 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 are respectively located on two opposite sides of the inlet.

3. The side channel pump according to claim 1, wherein The axial depth and radial width of the first groove are both smaller than those of the second flow channel, and the tail end of the second flow channel forms a transition section.

4. The side channel pump according to claim 1, wherein A recess is formed on the inner side of the side plate. The recess includes a head end and a tail end that are circumferentially opposite to each other along the rotation direction of the impeller. The tail end is located upstream of the outlet and extends to the first partition.

5. The side channel pump according to claim 4, characterized in that Along the rotation direction of the impeller, the axial depth of the recess gradually decreases.

6. The side channel pump according to claim 4, wherein: A first slope and a second slope are formed on both sides of the first partition in the circumferential direction, respectively. The first slope and the second slope are close to each other toward the side end of the cover plate and away from each other toward the side end of the base plate, forming an "eight" shape as a whole.

7. The side channel pump according to claim 6, wherein: The second inclined surface faces the outlet, and the tail end of the recess crosses the second inclined surface.

8. The side channel pump according to claim 1, wherein: The first flow channel forms a guide surface at one end thereof facing the inlet, and the included angle between the guide surface and the substrate is an obtuse angle.

Images