Pump cover assembly and water pump
By designing guide surfaces and through-hole structures on the inner wall of the pump cover, the problems of time-consuming and easily mis-installed filter assembly are solved, achieving convenient installation and noise reduction, and improving the overall performance of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGMEN TIANDE ELECTRICAL APPLIANCE CO LTD
- Filing Date
- 2025-07-29
- Publication Date
- 2026-05-12
AI Technical Summary
The existing centrifugal pumps with filters require adjustment of the filter's assembly angle during assembly to match the pump casing structure, resulting in time-consuming assembly and a high risk of incorrect installation, thus requiring improvement.
An annular baffle is provided on the inner wall of the pump cover to divide the inner cavity into two receiving cavities. A guide surface and through hole structure are designed on the baffle to allow the filter to be inserted into the mounting slot in an adaptive manner, so as to achieve axial overlap of the through holes, simplify the assembly process and reduce noise.
This facilitates easy filter installation, reduces assembly difficulty and noise, and improves equipment lifespan and production qualification rate.
Smart Images
Figure CN224228953U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a pump cover assembly and a water pump using the pump cover assembly, and is classified under IPC F04D29 / 70. Background Technology
[0002] Existing centrifugal pumps with filters, such as the one described in prior patent application CN215333465U entitled "A Filter and a Centrifugal Pump," include a pump casing and a filter mounted on the casing. The pump casing has an inlet pipe and an outlet pipe communicating with its filter chamber and impeller chamber, respectively. The filter is installed inside the filter chamber, and its end plate facing the impeller chamber has noise-reducing through holes. During installation, the filter's assembly angle needs to be adjusted to ensure the noise-reducing through holes are properly aligned with the structure on the pump casing. Current pump assembly is time-consuming and prone to misassembly, indicating a need for improvement. Utility Model Content
[0003] To solve the above problems, this utility model provides the following technical solution:
[0004] A pump cover assembly includes a pump cover having an inlet and an outlet, and a filter mounted on the pump cover. The inner wall of the pump cover has an annular baffle that divides its hollow inner cavity into a first receiving cavity communicating with the inlet and a second receiving cavity communicating with the outlet. The filter is mounted in the first receiving cavity. The assembly includes a bracket and a base plate located at the bottom end of the bracket. The bracket includes an axially extending connecting arm, and the connecting arm has a radially protruding guide block. The pump cover's first receiving cavity has symmetrical mounting grooves on its radial inner wall, with guide surfaces at the upper ends between the symmetrical mounting grooves. The baffle has a first baffle through hole, and the base plate has symmetrical first base through holes. In axial projection, the pump cover's axis is at the midpoint of the projection of the mounting groove closest to the first baffle through hole. Let L1 be the line connecting the two ends of the first baffle through hole and the axis of the pump cover, L2 and L3 respectively. Let K1 be the line connecting the center point of the guide block and the axis of the filter, and K2 be the line connecting the center point of the first bottom plate through hole adjacent to the guide block and the axis of the filter. Let a and b be the angles between lines L1 and L2 and L1 and L3 respectively, and let c be the angle between lines K1 and K2. Let S1 and S2 be the points where the ray S from the axis of the pump cover and passing through the center point of the first baffle through hole intersects the first baffle through hole. Let D1 and D2 be the distances from the axis of the pump cover to the intersection points S1 and S2 respectively, and D3 be the distance from the axis of the filter to the center point of the first bottom plate through hole. Then a≤c≤b and D1≤D3≤D2 are satisfied.
[0005] The pump cover assembly of this utility model, by providing a guide surface on the hollow inner cavity of the pump cover and optimizing the position of the first baffle through hole and the first bottom plate through hole, allows the filter to be automatically inserted into the mounting groove without alignment, and achieves at least partial overlap of the axial projection of the first baffle through hole and the first bottom plate through hole. This facilitates assembly while reducing the noise of the equipment using the pump cover assembly.
[0006] Furthermore, the guide surface gradually rises and then gradually decreases in a hillside shape from one end along the circumference.
[0007] Furthermore, the guide surface includes a first inclined plane and a second inclined plane whose radial projection is an inclined line, and the included angle α formed by the intersection of the first inclined plane and the second inclined plane is an obtuse angle.
[0008] Furthermore, the first and second inclined planes are symmetrically arranged.
[0009] Furthermore, the first inclined plane and the second inclined plane are connected by an arc-shaped transition surface.
[0010] Furthermore, in the axial projection, the plane passing through the axis of the inlet and perpendicular to the baffle divides the profile of the baffle into a region T1 near the outlet and a region T2 away from the outlet, with the first baffle through hole located in the region T2 away from the outlet.
[0011] Furthermore, in the axial projection, the projection of the axis through the outlet intersects the outline of the projection of the through hole in the first base plate.
[0012] Furthermore, the baffle is provided with a second baffle through hole and a third baffle through hole on both sides of the first baffle through hole, and the bottom plate is provided with a pair of second bottom plate through holes and a pair of third bottom plate through holes on both sides of the first bottom plate through hole. In the axial projection of the pump housing assembly, the outline of one of the second bottom plate through holes at least partially coincides with the outline of the second baffle through hole, and the outline of one of the third bottom plate through holes at least partially coincides with the outline of the third baffle through hole.
[0013] A water pump includes a stator assembly, a pump body fixed to the stator assembly, a rotor rotatably mounted on the pump body, and an impeller mounted on one axial side of the rotor, characterized in that: it further includes a pump cover assembly of any one of the above, the pump cover assembly being mounted on the pump body and housing the impeller in a second receiving cavity. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural schematic diagram of the pump cover assembly of this utility model;
[0015] Figure 2 This is an axial sectional view of the pump cover assembly of this utility model;
[0016] Figure 3This is a three-dimensional structural diagram of the pump cover of this utility model;
[0017] Figure 4 This is an axial sectional view of the pump cover of this utility model;
[0018] Figure 5 This is a top view of the pump cover of this utility model;
[0019] Figure 6 This is a three-dimensional structural diagram of the filter of this utility model;
[0020] Figure 7 This is a bottom view of the pump cover of this utility model;
[0021] Figure 8 This is an axial sectional view of another embodiment of the pump cover of this utility model;
[0022] Figure 9 This is a three-dimensional structural diagram of the water pump of this utility model;
[0023] Wherein: 10-Pump cover assembly, 20-Stator assembly, 30-Pump body, 40-Impeller, 11-First receiving cavity, 12-Second receiving cavity, 100-Pump cover, 110-Inlet, 120-Outlet, 130-Baffle, 131-First baffle through hole, 132-Second baffle through hole, 133-Third baffle through hole, 140-Mounting groove, 150-Guide surface, 151-First inclined plane, 152-Second inclined plane, 153-Transition surface, 160-Main body, 200-Filter, 210-Bracket, 211-Connecting arm, 212-Guide block, 220-Base plate, 221-First base plate through hole, 222-Second base plate through hole, 223-Third base plate through hole Detailed Implementation
[0024] This utility model discloses a pump cover assembly, see... Figures 1 to 7The pump cover assembly 10 includes a pump cover 100 and a filter 200 mounted on the pump cover. The pump cover 100 includes an annular main body 160 open at both ends axially, and an inlet 110 and an outlet 120 disposed on the main body 160. The inner wall of the main body 160 is provided with an annular baffle 130, which divides the hollow inner cavity of the main body 160 into a first receiving cavity 11 communicating with the inlet 110 and a second receiving cavity 12 communicating with the outlet 120. The radial inner wall of the first receiving cavity 11 is provided with a pair of symmetrical mounting grooves 140. The upper end of the two symmetrical mounting grooves 140 is provided with a guide surface 150 between them in the circumferential direction. The baffle 130 is provided with a first baffle through hole 131 that connects the first receiving cavity 11 and the second receiving cavity 12. The filter 200 is installed in the first receiving cavity 11. It includes a bracket 210 and a base plate 220 fixed on the bracket 210. The bracket 210 includes an axially extending columnar connecting arm 211. Preferably, the connecting arm 211 is a pair. The radial surface of the connecting arm 211 has a guide block 212 protruding outward. The axial end face of the base plate 220 is provided with a symmetrical first base plate through hole 221. In the axial projection of the pump cover assembly 10, the line connecting the axis of the pump cover 100 and the midpoint of the projection of the mounting groove 140 near the first baffle through hole 131 is L1; the lines connecting the two circumferential ends of the first baffle through hole 131 to the axis of the pump cover 100 are L2 and L3, respectively; the line connecting the center point of the guide block 212 to the axis of the filter is K1; the line connecting the center point of the first bottom plate through hole 221 adjacent to the guide block 212 to the axis of the filter is K2; the line connecting L1 and the line connecting L2 and... The angles between continuous line L1 and connecting line L3 are a and b, respectively, and the angle between connecting lines K1 and K2 is c. A ray S originates from the axis of the pump cover and passes through the center point of the first baffle through-hole. This ray S intersects the first baffle through-hole 131 at points S1 and S2, respectively. The distances from the axis of the pump cover to the intersection points S1 and S2 are D1 and D2, respectively. The distance from the axis of the filter to the center point of the first bottom plate through-hole 221 is D3. Therefore, a≤c≤b and D1≤D3≤D2 are satisfied. With the pump cover assembly designed above, the filter can be adaptively inserted into the mounting slot without alignment, and the axial projections of the first baffle through-hole and the first bottom plate through-hole at least partially overlap, facilitating assembly while reducing noise in equipment using this pump cover assembly. Preferably, the opening size of the first baffle through hole 131 is the same as that of the first bottom plate through hole 221, and in the axial projection of the pump cover assembly, the included angle value c formed by the connecting lines K1 and K2 on the filter 200 is (a+b) / 2; the distance D3 between the axis of the filter 200 and the center point of the first bottom plate through hole is (D1+D2) / 2.
[0025] See Figure 3 and Figure 4The guide surface 150 of the pump cover 10 of this invention is a slope-shaped structure that gradually rises and then gradually decreases circumferentially from the connection point with the mounting groove 140 at one end, connecting to another mounting groove 140. This design allows the filter to slide smoothly into the mounting groove, reducing wear between the pump cover and the filter and improving the overall service life. Furthermore, the guide surface 150 includes a first inclined plane 151 and a second inclined plane 152, whose radial projections are respectively inclined lines. The included angle α formed by the intersection of the first inclined plane 151 and the second inclined plane 152 is an obtuse angle. This design simplifies the mold design for producing the pump cover and facilitates manufacturing. Furthermore, to reduce deformation defects during injection molding of the pump cover and improve the production yield, the first inclined plane 151 and the second inclined plane 152 of this invention are symmetrically arranged. Of course, in other embodiments, the top two sides of the guide surface 150 can also be curved surfaces, with a rounded transition at the intersection of the two curved surfaces.
[0026] See Figure 5 In the axial projection of the pump cover, a plane passing through the axis of the inlet 110 and perpendicular to the baffle 130 divides the contour of the baffle 130 into a region T1 near the outlet 120 and a region T2 away from the outlet 120. The first baffle through-hole 131 is located in the region T2 away from the outlet 120. This design facilitates the discharge of gas from the cavity within the pump cover assembly during operation, reducing noise caused by water-air mixing within the pump cover. Furthermore, to allow for rapid drainage of gas from the first receiving cavity 11 and the second receiving cavity 12, the flow rate of the equipment using this pump cover assembly is increased. In the axial projection of the pump cover, the projection of the axis of the outlet 120 intersects the contour of the projection of the first bottom plate through-hole 131.
[0027] Furthermore, see Figure 5 and Figure 6 The pump cover 100's baffle 130 is further provided with a second baffle through hole 132 and a third baffle through hole 133 on both circumferential sides of the first baffle through hole 131; the filter 200's bottom plate 220 is further provided with a pair of second bottom plate through holes 222 and third bottom plate through holes 223 on both circumferential sides of the first bottom plate through hole 221. In the axial projection of the pump housing assembly 10, the outline of one of the aforementioned second bottom plate through holes 222 at least partially coincides with the outline of the second baffle through hole 132, and the outline of one of the aforementioned third bottom plate through holes 223 at least partially coincides with the outline of the third baffle through hole 133.
[0028] See Figure 8This utility model also provides another embodiment of the pump cover. Except for the structure of the guide surface, the structure of this embodiment is the same as the pump cover described above, and will not be repeated here. The difference between the guide surface 150 of this embodiment and the guide surface described above is that the guide surface 150 of this embodiment also includes an arc-shaped transition surface 153 that connects the first inclined plane 151 and the second inclined plane 152. This design reduces damage caused by the impact of the filter with the two inclined planes during assembly, thus extending the lifespan of the pump cover assembly.
[0029] See Figure 9 The present invention also discloses a water pump, which includes a stator assembly 20, a pump body 30 fixed on the stator assembly 10, a rotor (not shown) rotatably mounted on the pump body 30, an impeller 40 mounted on one side of the rotor axis, and any of the above-mentioned pump cover assembly 10. The pump cover assembly 10 is mounted on the pump body 30 and the impeller 40 is housed in a second receiving cavity.
[0030] This utility model is not limited to the above-described embodiments. If any modifications or variations to this utility model do not depart from the spirit and scope of this utility model, and if such modifications and variations fall within the scope of the claims and equivalent technologies of this utility model, then this utility model also intends to include such modifications and variations.
Claims
1. A pump cover assembly, comprising a pump cover (100) having an inlet (110) and an outlet (120) and a filter (200) mounted on the pump cover, wherein the inner wall of the pump cover (100) is provided with an annular baffle (130) dividing its hollow inner cavity into a first receiving cavity (11) communicating with the inlet (110) and a second receiving cavity (12) communicating with the outlet (120), the filter (200) being mounted in the first receiving cavity (11), comprising a bracket (210) and a base plate (220) disposed at the bottom end of the bracket, the bracket (210) comprising an axially extending connecting arm (211), the connecting arm (211) having a radially protruding guide block (212), characterized in that: The first receiving cavity (11) of the pump cover (100) has symmetrical mounting grooves (140) on its radial inner wall. The upper end of the symmetrical mounting grooves (140) is provided with a guide surface (150). The baffle (130) has a first baffle through hole (131). The bottom plate (220) has symmetrical first bottom plate through holes (221). In axial projection, the line connecting the axis of the pump cover and the midpoint of the projection of the mounting groove (140) near the first baffle through hole (131) is L1. The lines connecting the two circumferential ends of the first baffle through hole (131) and the axis of the pump cover are L2 and L3, respectively. The center point of the guide block (212) is connected to the axis of the filter (200). The line connecting the two is K1, the line connecting the center point of the first bottom plate through hole (221) adjacent to the guide block (212) and the axis of the filter (200) is K2, the angles between the connecting lines L1 and L2 and L1 and L3 are a and b respectively, the angle between the connecting lines K1 and K2 is c, the points where the ray S starting from the axis of the pump cover and passing through the center point of the first baffle through hole intersects the first baffle through hole (131) are S1 and S2 respectively, the distances from the axis of the pump cover to the intersection points S1 and S2 are D1 and D2 respectively, the distance from the axis of the filter (200) to the center point of the first bottom plate through hole (221) is D3, then a≤c≤b, D1≤D3≤D2 are satisfied.
2. The pump cover assembly according to claim 1, characterized in that: The guide surface (150) is a slope that gradually rises and then gradually decreases along the circumference from one end.
3. A pump cover assembly according to claim 2, characterized in that: The guide surface (150) includes a first inclined plane (151) and a second inclined plane (152) whose radial projection is an inclined line. The included angle α formed by the intersection of the first inclined plane (151) and the second inclined plane (152) is an obtuse angle.
4. A pump cover assembly according to claim 3, characterized in that: The first inclined plane (151) and the second inclined plane (152) are symmetrically arranged.
5. A pump cover assembly according to claim 3 or 4, characterized in that: The first inclined plane (151) and the second inclined plane (152) are connected by an arc-shaped transition surface (153).
6. A pump cover assembly according to claim 1, characterized in that: In the axial projection, the plane passing through the axis of the inlet (110) and perpendicular to the baffle (130) divides the outline of the baffle (130) into a region T1 near the outlet (120) and a region T2 away from the outlet (120), with the first baffle through hole (131) located in the region T2 away from the outlet (120).
7. A pump cover assembly according to claim 6, characterized in that: In the axial projection, the projection of the axis of the outlet (120) intersects the outline of the projection of the first bottom plate through hole (221).
8. A pump cover assembly according to claim 6 or 7, characterized in that: The baffle (130) is provided with a second baffle through hole (132) and a third baffle through hole (133) on both sides of the first baffle through hole (131). The bottom plate is provided with a pair of second bottom plate through holes (222) and third bottom plate through holes (223) on both sides of the first bottom plate through hole (221). In the axial projection of the pump housing assembly, the outline of one of the second bottom plate through holes (222) at least partially coincides with the outline of the second baffle through hole (132), and the outline of one of the third bottom plate through holes (223) at least partially coincides with the outline of the third baffle through hole (133).
9. A water pump, comprising a stator assembly (20), a pump body (30) fixed to the stator assembly, a rotor rotatably mounted on the pump body, and an impeller (40) mounted on one axial side of the rotor, characterized in that: It also includes the pump cover assembly according to any one of claims 1 to 8, the pump cover assembly being mounted on the pump body (30) and the impeller (40) being housed in the second receiving cavity.