CN220060019U

CN220060019U - Pump case and drain pump comprising same

Info

Publication number: CN220060019U
Application number: CN202321530649.5U
Authority: CN
Inventors: 申宇豪; 谌志伟; 孟德田; 张影
Original assignee: Changzhou Leili Motor Science & Technology Co ltd
Current assignee: Changzhou Leili Motor Science & Technology Co ltd
Priority date: 2023-06-15
Filing date: 2023-06-15
Publication date: 2023-11-21
Anticipated expiration: 2033-06-15

Abstract

The utility model discloses a water pump shell and a drainage pump comprising the same, wherein the drainage pump shell comprises a columnar side wall and a top plate positioned at one axial end of the columnar side wall, a water inlet is formed in the top plate, and a water outlet is formed in the columnar side wall; the inner surface of roof is equipped with a plurality of radial extension along the delivery port and to the first recess that deepens gradually of water inlet direction, every the one end that the water inlet was kept away from to first recess communicates jointly has the second recess, the second recess is open structure, and the opening of second recess sets up towards the delivery port direction. According to the utility model, the first grooves and the second grooves are distributed on the top plate of the water pump shell from the water inlet to the columnar side wall, sediment is easier to enter the first grooves at the periphery of the water inlet under the action of centrifugal force, and the sediment is dispersed to the periphery through the first grooves and then collected to the second grooves after entering from the water inlet, flows out to the water outlet direction under the guidance of the second grooves, so that the sediment is effectively discharged.

Description

Pump case and drain pump comprising same

Technical Field

The utility model relates to the technical field of motor design, in particular to a water pump shell and a drainage pump comprising the same.

Background

The drain pump generally comprises a pump housing and a motor assembly, wherein the pump housing 1 and the motor housing 201 in the motor assembly form a pump cavity 8, as shown in fig. 1, the influence on the silt-preventing structure in the actual use process is not considered in the drain pump with the existing structure, so that after the foreign matters or silt of fine particles enter the pump cavity 8 through the water inlet 3 of the pump housing 1, the silt cannot be effectively discharged from the water outlet 4 along with water flow. And the bottom surface 9 of the pump cavity is an inclined surface, and sediment naturally slides to the space between the impeller 5 and the lower bearing seat 10, so that torque is reduced, and even the pump cavity is blocked so that the pump cavity cannot rotate.

Therefore, how to design a pump housing and a drain pump with a silt preventing structure is a technical problem to be solved.

Disclosure of Invention

In order to solve the technical problems that the sediment prevention effect of a drainage pump in the prior art is poor, fine particles cannot be discharged along with water flow, and the drainage pump is easy to block, the utility model provides a water pump shell and the drainage pump comprising the same, and aims to solve the problems.

The utility model provides a water pump shell, which comprises a columnar side wall and a top plate positioned at one axial end of the columnar side wall, wherein a water inlet is formed in the top plate, and a water outlet is formed in the columnar side wall; the inner surface of roof is equipped with a plurality of radial extension along the delivery port and to the first recess that deepens gradually of water inlet direction, every the one end that the water inlet was kept away from to first recess communicates jointly has the second recess, the second recess is open structure, and the opening of second recess sets up towards the delivery port direction.

Further, the second groove extends in an arc shape.

Further, the top plate consists of a fan-shaped drainage area and a fan-shaped diversion area, wherein the fan-shaped drainage area is arranged towards one side of the water outlet, and the fan-shaped drainage area takes the projection of the central axis of the water outlet on the surface of the top plate as a symmetry axis; the first groove and the second groove are positioned in the fan-shaped diversion area, and the central angle c of the fan-shaped drainage area is larger than 60 degrees.

Further, an included angle b between adjacent first grooves is 35-45 degrees.

Further, the first grooves are symmetrically arranged, the second grooves are of symmetrical structures, and the symmetrical axes of the first grooves are coincident with the symmetrical axes of the second grooves and are parallel to the central axis of the water outlet.

Further, the included angle a between the inner bottom surface of the first groove and the plane of the top plate is 15-25 degrees.

Further, a=20°.

Further, the cross section of the first groove is rectangular, wedge-shaped, trapezoid or triangle.

Further, the cross section of the first groove is trapezoid, and the short side of the trapezoid is located at the inner bottom surface of the first groove.

Further, the cross section of the second groove is arc-shaped.

The utility model also provides a drainage pump which comprises a motor assembly and the water pump shell, wherein the motor assembly comprises a motor shell, a stator assembly and a rotor assembly which are positioned in the motor shell, and an impeller connected with the rotor assembly; the motor casing is connected with the water pump casing to form a pump cavity for accommodating the impeller.

Further, the end face, facing the top plate, of one side of the motor casing is a plane perpendicular to the central axis of the drainage pump.

The beneficial effects of the utility model are as follows:

(1) According to the water pump shell and the drainage pump comprising the same, the first grooves and the second grooves are distributed on the top plate of the water pump shell from the water inlet to the columnar side wall, sediment is easier to enter the first grooves at the periphery of the water inlet under the action of centrifugal force, and the sediment is dispersed to the periphery through the first grooves after entering from the water inlet along with water flow, is collected to the second grooves, flows out to the water outlet direction under the guidance of the second grooves, so that the sediment is effectively discharged.

(2) The bottom surface of the pump cavity is changed into a plane from an inclined surface, and residual sediment in the pump cavity cannot naturally slide into the space between the impeller and the lower bearing seat, but can be discharged from the water outlet through a groove in the pump cavity by motor load running.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a schematic structure view of a related art drain pump;

FIG. 2 is a side view of a water inlet of an embodiment of a water pump housing according to the present utility model;

FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;

FIG. 4 is an enlarged view at n in FIG. 3;

FIG. 5 is a perspective view of an embodiment of a water pump housing according to the present utility model;

FIG. 6 is a graph of the number of first grooves versus the performance of the drain pump according to the present utility model;

FIG. 7 is an exploded view of the drain pump according to the present utility model;

FIG. 8 is a schematic view of a drain pump according to the present utility model;

fig. 9 is a schematic view of a motor housing in accordance with the present utility model.

In the figure, 1, a water pump shell, 101, a columnar side wall, 102, a top plate, 1021, a fan-shaped drainage area, 1022, a fan-shaped diversion area, 2, a motor component, 201, a motor shell, 202, a rotor component, 203, a stator component, 204,3, a water inlet, 4, a water outlet, 5, an impeller, 6, a first groove, 7, a second groove, 8, a pump cavity, 9, a pump cavity bottom surface, 10 and a lower bearing seat.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

The water pump shell comprises a columnar side wall 101 and a top plate 102 positioned at one axial end of the columnar side wall 101, wherein a water inlet 3 is formed in the top plate 102, and a water outlet 4 is formed in the columnar side wall 101; the internal surface of roof 102 is equipped with a plurality of radial radiation along delivery port 4 and to the first recess 6 that deepens gradually of water inlet 3 direction, and every first recess 6 is kept away from the one end of water inlet 3 and is linked together and have second recess 7, and first recess 6 is provided with a plurality ofly, and second recess 7 only sets up one, and second recess 7 is open structure, and the opening of second recess 7 sets up towards delivery port 4 direction, open structure means non-closed loop structure, and second recess 7 has two exit ends promptly, and two exit ends form the opening.

The roof 102 is the circular plate, delivery port 4 is located the center of roof 102, the column lateral wall 101 is located the periphery of roof 102, first recess 6 extends to delivery port 4 direction along radial by the outer fringe of roof 102, a plurality of first recesses 6 are radial arrangement with the center of roof 102 as the centre of a circle, the degree of depth of first recess 6 is the depth that the direction roof 102 thickness direction was submerged, namely the distance between first recess 6 top surface and the interior bottom surface, the degree of depth of first recess 6 deepens gradually from radial outside to radial inboard, be favorable to silt to get into first recess 6 along with rivers from water inlet 3, second recess 7 is used for converging the silt and rivers back together row to delivery port 4 of a plurality of first recesses 6, effectively prevent silt and stop up, avoid rivers to produce the disorder in column lateral wall 101 department simultaneously, cause vibration noise.

The cross section of the first recess 6 may be rectangular or wedge-shaped or trapezoid or triangle, and the cross section of the second recess 7 is preferably circular arc.

The number of the first grooves 6 can be 1-8, as shown in fig. 6, the energy loss is caused by the collision of the water flow with the first grooves 6, and the flow is smaller as the number of the first grooves 6 is larger. In the water-air mixing state, the first groove 6 can absorb noise generated by stirring the water in the pump cavity 8. When the flow requirement is more than 18L/min, the number of the first grooves 6 is preferably 4-7, and the noise fluctuation in the interval is not large.

Example 1

2-5, the water pump shell 1 comprises a columnar side wall 101 and a top plate 102 positioned at one axial end of the columnar side wall 101, wherein a water inlet 3 is formed in the top plate 102, a water outlet 4 is formed in the columnar side wall 101, and the water outlet 4 is tangential to the outer edge of the top plate 102; the inner surface of roof 102 is equipped with four along the radial radiation extension of delivery port 4 and deepens gradually towards water inlet 3 direction first recess 6, and the one end that every first recess 6 kept away from water inlet 3 communicates jointly has second recess 7, and second recess 7 is the arc and extends, and as shown in fig. 2, first recess 6 and second recess 7 are located the below of water pump case 1, and delivery port 4 is located the top of water pump case 1, and the opening of second recess 7 is upwards directed.

As shown in fig. 5 and 8, when the motor is operated, the impeller 5 agitates the liquid in the pump chamber 8 to generate centrifugal force, and the first groove 6 is formed in the circumferential direction of the water inlet 3, so that sediment in the circumferential direction of the water inlet 3 can more easily enter the first groove 6. The sediment in the first recess 6 follows the water flow into the second recess 7. The first groove 6 and the second groove 7 are connected by using a round angle, so that sediment can not be accumulated at the joint of the first groove 6 and the second groove 7, and the sediment in the second groove 7 flows out from the water outlet 4 along with water flow, so that the sediment discharge efficiency is improved.

In this embodiment, the cross section of the first groove 6 is trapezoidal, and the short side of the trapezoid is located at the inner bottom surface of the first groove 6. As shown in fig. 3, the first groove 6 is in an inverted trapezoid shape, and the opening at the upper end of the first groove 6 is larger, so that sediment and water flow can enter, and meanwhile, sediment and water flow cannot be accumulated in the first groove 6. The cross section of the second groove 7 is arc-shaped, so that water flow and sediment can smoothly transition from the first groove 6 to the second groove 7, and flow loss cannot occur in the second groove 7 due to the existence of edges and corners.

The first groove 6 is gradually deepened toward the water inlet 3, and the first groove 6 is often worn by silt, so that a certain wall thickness needs to be ensured to prevent the water pump housing 1 from cracking, and for this purpose, preferably, as shown in fig. 4, the angle a between the inner bottom surface of the first groove 6 and the plane of the top plate 102 is 15 ° to 25 °, that is, the inclination angle a of the first groove 6 is 15 ° to 25 °, and in this embodiment, a=20°.

In order to ensure that the water pump shell 1 is stressed symmetrically, preferably, the four first grooves 6 are symmetrically arranged, the second grooves 7 are symmetrically structured, and the symmetry axes of the four first grooves 6 are coincident with the symmetry axis of the second grooves 7 and are parallel to the central axis of the water outlet 4. Preferably, the included angle b between adjacent first grooves 6 is 35 ° to 45 °.

Example two

The second groove 7 is used for guiding the sediment and the water flow to the direction of the water outlet 4, so as to prevent the energy loss caused by collision with the second groove 7 when the water flow flows out from the water outlet 4, generate noise and reduce the flow, and the basis of the first embodiment is further defined as follows:

as shown in fig. 2, the top plate 102 is composed of a fan-shaped drainage area 1021 and a fan-shaped diversion area 1022, wherein the fan-shaped drainage area 1021 and the fan-shaped diversion area 1022 are both in fan-shaped structures, the fan-shaped drainage area 1021 is arranged towards one side of the water outlet 4, and the projection of the central axis of the water outlet 4 on the surface of the top plate 102 is taken as a symmetry axis, namely, a vertical symmetry axis in fig. 2; the first groove 6 and the second groove 7 are positioned in the fan-shaped diversion area 1022, the central angle c of the fan-shaped drainage area 1021 is larger than 60 degrees, and other areas are the fan-shaped diversion area 1022.

Example III

A drain pump, as shown in fig. 7 and 8, comprises a motor assembly 2 and the water pump housing 1 described above, wherein the motor assembly 2 comprises a motor housing 201, a stator assembly 203 and a rotor assembly 202 positioned in the motor housing 201, and an impeller 5 connected with the rotor assembly 202; the motor casing 201 is connected with the water pump casing 1 to form a pump cavity 8 for accommodating the impeller 5, the top plate 102 of the water pump casing 1 is the top surface of the pump cavity 8, and the end surface of the motor casing 201 is the bottom surface 9 of the pump cavity. The stator assembly 203 is electrically connected with a power supply, the stator assembly 203 generates a rotating magnetic field after being electrified, the rotor assembly 202 rotates under the action of the rotating magnetic field and drives the impeller 5 to rotate, so that liquid is sucked into the pump cavity 8 from the water inlet 3.

Example IV

On the basis of the third embodiment, the end surface of the motor casing 201 facing the top plate 102 is a plane perpendicular to the central axis of the drain pump, and as shown in fig. 8 and 9, the pump chamber bottom surface 9 is a vertical plane. When the motor is in an idle state, residual sediment in the pump cavity 8 cannot naturally slide into the space between the impeller 5 and the lower bearing seat 10, and then is discharged from the water outlet 4 through the first groove 6 and the second groove 7 in the pump cavity 8 when the motor runs under load, so that the pump cavity 8 is prevented from being blocked.

In the description of the present utility model, it should be understood that the terms "center," "top," "bottom," "inner," "outer," "axial," "radial," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" and "a number" is two or more.

In this specification, a schematic representation of the terms does not necessarily refer to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims

1. A water pump housing, characterized in that: the water inlet type water heater comprises a columnar side wall (101) and a top plate (102) positioned at one axial end of the columnar side wall (101), wherein a water inlet (3) is formed in the top plate (102), and a water outlet (4) is formed in the columnar side wall (101);

the inner surface of roof (102) is equipped with a plurality of radial radiation along delivery port (4) and to first recess (6) that water inlet (3) direction deepened gradually, every the one end that water inlet (3) was kept away from to first recess (6) communicates jointly has second recess (7), second recess (7) are open structure, and the opening of second recess (7) sets up towards delivery port (4) direction.

2. The water pump housing (1) according to claim 1, characterized in that: the second groove (7) extends in an arc shape.

3. The water pump housing of claim 1, wherein: the top plate (102) consists of a fan-shaped drainage area (1021) and a fan-shaped diversion area (1022), the fan-shaped drainage area (1021) is arranged towards one side of the water outlet (4), and the projection of the center axis of the water outlet (4) on the surface of the top plate (102) is taken as a symmetry axis by the fan-shaped drainage area (1021);

the first groove (6) and the second groove (7) are positioned in the fan-shaped diversion area (1022), and the central angle c of the fan-shaped drainage area (1021) is larger than 60 degrees.

4. The water pump housing of claim 1, wherein: the included angle b between the adjacent first grooves (6) is 35-45 degrees.

5. The water pump housing of claim 1, wherein: the first grooves (6) are symmetrically arranged, the second grooves (7) are of symmetrical structures, and the symmetrical axes of the first grooves (6) are coincident with the symmetrical axes of the second grooves (7) and are parallel to the central axis of the water outlet (4).

6. The water pump housing of claim 1, wherein: the included angle a between the inner bottom surface of the first groove (6) and the plane of the top plate (102) is 15-25 degrees.

7. The water pump housing of claim 6, wherein: a=20°.

8. The water pump housing of claim 1, wherein: the cross section of the first groove (6) is rectangular, wedge-shaped, trapezoid or triangle.

9. The water pump housing of claim 8, wherein: the cross section of the first groove (6) is trapezoid, and the short side of the trapezoid is positioned on the inner bottom surface of the first groove (6).

10. The water pump housing of claim 1, wherein: the cross section of the second groove (7) is arc-shaped.

11. A drain pump, characterized by: comprising a motor assembly (2) and a water pump housing (1) according to any one of claims 1-10, the motor assembly (2) comprising a motor housing (201), a stator assembly (203) and a rotor assembly (202) located within the motor housing (201), and an impeller (5) connected to the rotor assembly (202); the motor shell (201) is connected with the water pump shell (1) to form a pump cavity (8) for accommodating the impeller (5).

12. The drain pump of claim 11, wherein: one side end surface of the motor casing (201) facing the top plate (102) is a plane perpendicular to the central axis of the drainage pump.