Water pump

Abstract

The utility model relates to a water pump which comprises a shell, a driving motor with a motor shaft and an impeller, the impeller is located in the shell and can be driven by the motor shaft, and the shell comprises a base located at the bottom. The base is provided with a through opening allowing a motor shaft to penetrate through, a water collecting tank arranged around the through opening, a plurality of water retaining walls arranged around the water collecting tank and at least one drainage channel in fluid communication with the water collecting tank. The drainage channel extends to the outer wall of the shell and forms a drainage opening. The water pump further comprises a water throwing ring fixedly installed on the motor shaft, and the water throwing ring is in clearance fit with the water retaining walls and located on the upper side of the water collecting tank. According to the water pump provided by the technical scheme of the utility model, water permeating into the base can be thrown away from the motor shaft through the water throwing ring, and then the water is blocked by the water retaining wall, is collected into the water collecting tank under the action of gravity, and finally leaves the water pump through the drainage channel. Therefore, the water pump can effectively prevent water from entering the driving motor.

Description

TECHNICAL FIELD

[0001] The utility model relates to water pump technical field especially is water pump with water throwing ring structure. BACKGROUND

[0002] The water pump generally includes a housing, a driving motor having a motor shaft, and an impeller located inside the housing. The impeller is mounted on the motor shaft and can be driven by the motor shaft. Usually, the water pump is provided with a shaft seal for sealing the motor shaft to prevent water from flowing to the driving motor from the gap between the motor shaft and the housing. However, the existing shaft seal cannot achieve complete sealing effect, and a certain amount of water still penetrates to the driving motor after long-term operation. SUMMARY

[0003] In view of the above technical problems, the utility model aims to provide a water pump which can effectively prevent water from entering the driving motor.

[0004] In order to achieve the above purpose, the utility model provides the following technical scheme: a water pump, comprising a housing, a driving motor having a motor shaft, and an impeller, the impeller being located inside the housing and being driven by the motor shaft, the housing comprising a base located at the bottom, the base being provided with a through port for the motor shaft, a water collecting groove arranged around the through port, a plurality of water retaining walls arranged around the water collecting groove, and at least one drainage channel in fluid communication with the water collecting groove, the drainage channel extending to the outer wall of the housing and forming a drainage port; the water pump further comprises a water throwing ring fixedly installed on the motor shaft, the water throwing ring being in clearance fit with the plurality of water retaining walls and being located on the upper side of the water collecting groove.

[0005] In the above technical scheme, preferably, the water throwing ring has a water receiving surface located at the top, and the upper boundary of the water retaining wall is higher than the water receiving surface.

[0006] In the above technical scheme, preferably, the base is provided with four drainage channels, and adjacent drainage channels are arranged at an angle of 90°.

[0007] In the above technical scheme, preferably, the drainage channel is inclined outward and downward.

[0008] In the above technical scheme, preferably, the base further comprises an annular convex lip located on the inner side of the water collecting groove and protruding upward, and the water throwing ring further comprises an annular outer wall extending downward, the annular outer wall extending into the water collecting groove and being in clearance fit with the annular convex lip.

[0009] In the above technical scheme, preferably, further comprising a shaft seal arranged on the base, the shaft seal having a plurality of sealing lips in contact with the motor shaft.

[0010] In the above preferred embodiments, it is further preferred that the shaft seal has at least one first sealing lip inclined inwardly and upwardly, and at least one second sealing lip inclined inwardly and downwardly.

[0011] In the above preferred embodiments, it is further preferred that the base further comprises a plurality of matching walls arranged around the plurality of water retaining walls, the plurality of water retaining walls and the plurality of matching walls jointly defining an assembly groove, and the shaft seal is assembled on the assembly groove. It can be further preferred that the assembly groove is in fluid communication with the at least one water drainage channel.

[0012] In the above preferred embodiments, it is further preferred that the housing further comprises a middle base fixedly connected to the upper side of the base, and the shaft seal is clamped between the base and the middle base.

[0013] The water pump provided by the technical scheme of the utility model can throw the water permeated into the base away from the motor shaft through the water throwing ring, and then the part of water is blocked by the water retaining wall and gathered into the water collecting groove under the action of gravity, and finally leaves the water pump through the water drainage channel. Thus, the water pump can effectively avoid water entering the driving motor. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a perspective view of the water pump provided by the utility model;

[0015] Figure 2 It is a sectional view of the water pump shown in the figure; Figure 1

[0016] Figure 3 It is an enlarged view of A shown in the figure; Figure 2

[0017] Figure 4 It is a perspective view of the base of the water pump shown in the figure. Figure 1 Markings in the figure:

[0018] 100, water pump;

[0019] 1, housing; 11, top cover; 12, middle base;

[0020] 13, base; 131, first through port; 132, water collecting groove; 133, water retaining wall; 134, water drainage channel; 135, water drainage port; 136, annular convex lip; 137, matching wall;

[0021] 14, water inlet channel; 15, water pumping cavity;

[0022] 2, driving motor; 21, motor shaft; 22, motor housing;

[0023] ​​​

[0024] 3. Impeller;

[0025] 4. Shaft seal; 41. First sealing lip; 42. Second sealing lip; 43. Third sealing lip;

[0026] 5. Water-receiving ring; 51. Water-receiving surface; 52. Annular outer wall;

[0027] Y, axis. Detailed Implementation

[0028] To explain in detail the technical content, structural features, achieved objectives and effects of this application, the technical solutions in the embodiments of this application will be described below with reference to the accompanying drawings.

[0029] In this application, spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side” (e.g., as in a “sidewall”) are used to describe the relationship between one element and another (other) element as shown in the accompanying drawings. Spatial relative terms are intended to include different orientations of the device in use, operation, and / or manufacture other than those depicted in the drawings. For example, if the device in the drawings is flipped, an element described as “below” or “under” another element or feature would then be positioned “above” said other element or feature. Thus, the exemplary term “below” can include both above and below orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), thus interpreting the spatial relative descriptive terms used herein accordingly.

[0030] like Figures 1-2 As shown, this utility model provides a water pump 100, which can effectively prevent water from flowing into the drive motor along the gap between the motor shaft and the housing. Specifically, the water pump 100 includes a housing 1, a drive motor 2 with a motor shaft 21, an impeller 3 rotatably mounted inside the housing 1, a shaft seal 4 for sealing the motor shaft 21, and a water-throwing ring 5 fixedly mounted on the motor shaft 21. In this application, the direction of the axis Y of the motor shaft 21 is defined as the vertical direction, and the impeller 3 is located on the upper side of the base 13; furthermore, in this application, the side closer to the axis Y is defined as the inner side, and the side farther from the axis Y is defined as the outer side.

[0031] The shell 1 comprises a top cover 11, a middle base 12 fixedly connected to the lower side of the top cover 11, and a bottom base 13 fixedly connected to the lower side of the middle base 12, and the top cover 11, the middle base 12 and the bottom base 13 are sequentially arranged along the vertical direction. The top cover 11 has a water inlet channel 14 for water to enter the water pump 100 and a water outlet channel (not shown in the figure) for water to flow out of the water pump 100, and the top cover 11 and the middle base 12 jointly define a pump water cavity 15, and the water inlet channel 14, the pump water cavity 15 and the water outlet channel are sequentially and fluidly connected to form a complete fluid path.

[0032] The motor housing 22 of the driving motor 2 is fixedly installed on the bottom base 13. The bottom base 13 and the middle base 12 are respectively provided with a first through port 131 and a second through port (not marked in the figure) for the motor shaft 21 to pass through, and the impeller 3 is located in the pump water cavity 15 and is fixedly installed on the motor shaft 21 at a side end portion away from the motor housing 22. Thus, by driving the impeller 3 to rotate by the driving motor 2, a negative pressure can be formed in the water inlet channel 14 to suck in water and a positive pressure can be formed in the water outlet channel 15 to output water.

[0033] Referring to Figure 3 and Figure 4 , the water throwing ring 5 is located on the upper side of the bottom base 13 and has a water receiving surface 51 formed at the top portion. The bottom base 13 is provided with a water collecting groove 132 arranged around the first through port 131, a plurality of water blocking walls 133 arranged around the water collecting groove 132, and at least one water draining channel 134 fluidly connected to the water collecting groove 132, and the water draining channel 134 is outwardly and downwardly inclined.

[0034] The above-mentioned water blocking walls 133 are arranged around the water throwing ring 5 and are in gap cooperation with the water throwing ring 5, and the top portion of the water blocking walls 133 is higher than the water receiving surface 51 of the water throwing ring 5. The water collecting groove 132 is located on the lower side of the water throwing ring 5, and the water draining channel 134 extends from the water collecting groove 132, and the side of the water draining channel 134 away from the water collecting groove 132 forms a water draining port 135 on the outer wall of the shell 1 which is in communication with the outside. Thus, when the water pump 100 is working, the water throwing ring 5 is driven to rotate by the motor shaft 21, and the water on the water receiving surface 51 of the water throwing ring 5 is thrown to the inner side wall surface of the water blocking walls 133 under the action of centrifugal force; thereafter, the water on the inner side wall surface of the water blocking walls 133 is collected to the water collecting groove 132 under the action of gravity, and finally leaves the inside of the water pump 100 through the water draining channel 134.

[0035] Further, the water throwing ring 5 further has a downwardly extending annular outer wall 52, and the bottom base 13 has an annular convex lip 136 located inside the water collecting groove 132 and adjacent to the first through port 131. The annular outer wall 52 extends into the water collecting groove 132, and the annular convex lip 136 is in gap cooperation with the annular outer wall 52 to avoid the water in the water collecting groove 132 and the water throwing ring 5 from falling into the gap between the motor shaft 21 and the shell 1.

[0036] Further, four drainage channels are arranged on the base 13, and each of the adjacent drainage channels is arranged at an angle of 90°. Thus, the internal water can be effectively drained in various installation postures of the water pump 100.

[0037] With reference to the accompanying drawings Figures 3-4 Further, a plurality of cooperation walls 137 are formed on the base 13 and located outside the water retaining wall 133. The cooperation walls 137 are arranged around the water retaining wall 133 and cooperated with the water retaining wall 133 to form an annular assembly groove (not shown in the drawings). The shaft seal 4 is assembled on the assembly groove and clamped between the base 13 and the middle base 12 in the vertical direction.

[0038] Further, the assembly groove is in fluid communication with the drainage channel 134, so as to drain the water permeated into the assembly groove.

[0039] The shaft seal 4 has a plurality of sealing lips which contact the motor shaft 21 and are located above the water throwing ring 5. The sealing lips include a first sealing lip 41 which is arranged inwardly and upwardly, a second sealing lip 42 which is arranged inwardly and upwardly, and a third sealing lip 43 which is arranged inwardly and downwardly. The first and second sealing lips form a containing space (not shown in the drawings) which can contain a certain amount of water. The third sealing lip 43 is arranged reversely, so that the shaft seal 4 has good sealing effect under the conditions of positive pressure and negative pressure of the pump water chamber 15.

[0040] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable the person skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit of the present application should be covered within the protection scope of the present application.

Claims

1. A water pump, comprising a housing, a drive motor having a motor shaft, and an impeller, wherein the impeller is located inside the housing and can be driven by the motor shaft, characterized in that, The housing includes a base at the bottom, the base having an opening through which the motor shaft passes, a water collection trough arranged around the opening, a plurality of water-retaining walls arranged around the water collection trough, and at least one drainage channel fluidly communicating with the water collection trough, the drainage channel extending to the outer wall of the housing and forming a drain outlet; the water pump also includes a water-throwing ring fixedly installed on the motor shaft, the water-throwing ring being in clearance fit with the plurality of water-retaining walls and located on the upper side of the water collection trough.

2. The water pump according to claim 1, characterized in that, The water-slinging ring has a water-receiving surface at the top, and the upper boundary of the water-blocking wall is higher than the water-receiving surface.

3. The water pump according to claim 1 or 2, characterized in that, The base is equipped with four drainage channels, and adjacent drainage channels are set at a 90° angle.

4. The water pump according to claim 1 or 2, characterized in that, The drainage channel is inclined inward and downward.

5. The water pump according to claim 1 or 2, characterized in that, The base also includes an annular lip that is located inside the water collection tank and protrudes upward, and the water-slinging ring also includes an annular outer wall that extends downward, the annular outer wall extending into the water collection tank and fitting with the annular lip with a clearance.

6. The water pump according to claim 1 or 2, characterized in that, It also includes a shaft seal that is fitted onto the base, the shaft seal having a plurality of sealing lips that contact the motor shaft.

7. The water pump according to claim 6, characterized in that, The shaft seal has at least one first sealing lip that is inclined upward and inward and at least one second sealing lip that is inclined inward and downward.

8. The water pump according to claim 6, characterized in that, The base also includes several mating walls arranged around the several water-retaining walls, the several water-retaining walls and the several mating walls together defining an assembly groove, and the shaft seal is assembled on the assembly groove.

9. The water pump according to claim 8, characterized in that, The assembly tank is fluidly connected to at least one of the drainage channels.

10. The water pump according to claim 6, characterized in that, The housing also includes a central seat fixedly connected to the upper side of the base, and the shaft seal is clamped between the base and the central seat.

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