Miniature centrifugal pump convenient for filter assembly

Abstract

A miniature centrifugal pump facilitating filter assembly comprises a pump body, a stator, a pump shell, a rotor, an impeller and a filter, the pump shell is provided with an impeller cavity and a filter cavity, the filter comprises a lower end cover, an upper end cover, a connecting wall body and a limiting part, and the inner wall face, located in the filter cavity, of the pump shell protrudes in the radial direction to form a guide part; the guide part comprises a first guide part, a second guide part and a connecting part, a groove allowing the limiting part to be inserted is formed in the circumferential adjacent area of the first guide part and the second guide part, and a first guide face and a second guide face are formed on the sides, axially away from the impeller cavity, of the first guide part and the second guide part correspondingly; the first guide face and the second guide face are each in a slope shape which is gradually raised and then gradually lowered in the circumferential direction from one end. According to the centrifugal pump, when the filter is inserted into the pump shell to be assembled, the filter can slide into the groove along the first guide face and the second guide face through the limiting part under the action of gravity or assembling thrust, the filter does not need to be inserted and installed after being aligned, assembling is simple and reliable, and a user can use the filter conveniently.

Description

TECHNICAL FIELD

[0001] The utility model relates to a micro centrifugal pump convenient for filter assembly, and belongs to F04D29 / 70 in IPC classification. BACKGROUND

[0002] The prior centrifugal pump with filter, such as the prior patent application No. CN215333465U and the patent name filter and centrifugal pump shown, includes the pump shell and sets up on the filter of pump shell, the water inlet pipe and the water outlet pipe that pump shell is equipped with respectively with its filter cavity and impeller cavity intercommunication, the filter includes the upper end cover, the lower end cover and the connecting wall body that connects two, when installing, to avoid the connecting wall body of filter to block the water inlet pipe, need to carry out position adjustment to connecting wall body after again inserting installation in pump shell, and the assembly process is complicated and is easy to make a mistake.Therefore, there is the demand of improvement. UTILITY MODEL CONTENTS

[0003] To solve the above problem, the utility model provides the following technical scheme:

[0004] A micro centrifugal pump convenient for filter assembly, including pump body, fixed on the stator of pump body, the pump shell that is installed on the pump body in the axial direction, the rotor that is rotatably installed on the pump body, the impeller and the filter, the pump shell is equipped with the impeller cavity containing the impeller and the filter cavity containing the filter, the filter includes the lower end cover of ring column, the upper end cover, the connecting wall body that connects two and the limiting portion that protrudes in the radial direction of connecting wall body, its characterized in that: the inner wall surface of pump shell in filter cavity protrudes in the radial direction and forms the guide portion, the guide portion includes the first guide portion, the second guide portion and the connecting portion that connects two, the circumferential adjacent area of first guide portion and second guide portion forms the groove for the limiting portion insertion, the side of two axial directions away from the impeller cavity forms the first guide surface and the second guide surface respectively, the first guide surface and the second guide surface are all from one end along the circumferential gradually rising and then gradually descending hillside shape.

[0005] The micro centrifugal pump convenient for filter assembly of the utility model, the first guide surface and the second guide surface of pump shell are designed as the arc shape that gradually rises and then gradually descends along the circumferential from the end, when the filter is inserted into the pump shell and assembled, the limiting portion slides into the groove under the action of gravity or assembly thrust along the first guide surface and the second guide surface, it does not need to be aligned and then inserted and installed, and the assembly is simple and reliable, which is convenient for user to use.

[0006] Further, the first guide surface and the second guide surface are arranged symmetrically about the face of the axis of the pump shell and the midline of the groove.

[0007] Further, in the cross-sectional view of the plane that passes through the axis of the pump shell and is perpendicular to the axis of the water inlet pipe, the angle between any tangent line of the first guide surface or the second guide surface and the horizontal line is in the range of 15° to 75°.

[0008] Further, the surface of the limiting part axially facing one end of the lower end cover is designed as a circular arc.

[0009] Further, in a cross-sectional view of the pump housing on a surface perpendicular to the axis of the water inlet pipe and passing through the axis of the pump housing, the profile of the water inlet pipe of the pump housing falls within the range of the profile of the first guide part or the second guide part. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a three-dimensional structural schematic view of the centrifugal pump of the utility model;

[0011] Figure 2 is a structural schematic view of the filter and the pump housing after decomposition of the utility model;

[0012] Figure 3 is a top view of the pump housing of the utility model;

[0013] Figure 4 is a three-dimensional structural schematic view of the pump housing of the utility model;

[0014] Figure 5 is an axial sectional view of the pump housing of the utility model;

[0015] Figure 6 is a front view of the filter of the utility model;

[0016] Wherein: 11-impeller cavity, 12-filter cavity, 31-first guide surface, 32-second guide surface, 33-groove, 100-pump body, 200-stator, 300-pump housing, 310-guide part, 311-first guide part, 312-second guide part, 313-connection part, 320-water inlet pipe, 330-water outlet pipe, 340-baffle, 400-impeller, 500-filter, 510-lower end cover, 520-upper end cover, 530-connection wall body, 540-limiting part, 600-rotary cover DETAILED DESCRIPTION

[0017] The utility model discloses a micro centrifugal pump convenient for filter assembly, see Figure 1 And Figure 2 The centrifugal pump includes pump body 100, stator 200 fixed on pump body 100, pump housing 300 axially installed on the pump body, rotatable rotor (not shown) installed on the pump body, impeller 400 fixed on one end of the rotor, filter 500 accommodated in the inner chamber of pump housing 300 and rotary cover 600 installed on the top end of filter 500. The improvement point of the utility model is pump housing 300 and filter 500, and other structures are same with prior art, which will not be repeated here.

[0018] See Figures 3 to 5The utility model discloses a pump shell 300 axial both ends open, the whole is cylindrical, the inner chamber lower part inner wall of this pump shell 300 radially protruding has the baffle 340 of ring shape, and its outer wall radially extends the water inlet pipe 320 and the water outlet pipe 330, and the baffle 340 divides the inner chamber of pump shell 300 into the impeller chamber 11 of accommodating the impeller 400 and the filter chamber 12 of accommodating the filter 500, and the water inlet pipe 320 is communicated with the filter chamber 12, and the water outlet pipe 330 is communicated with the impeller chamber 11. Figure 5 The first guide surface 31 is gradually raised and then gradually lowered along the circumference from one end, and similarly, the second guide surface 32 is also gradually raised and then gradually lowered along the circumference from one end.

[0019] See Figure 6 The filter 500 includes a cylindrical lower end cover 510, an upper end cover 520, and a connecting wall body 530 connecting the lower end cover 510 and the upper end cover 520, and the utility model discloses that a limiting portion 540 is radially protruded on the outer surface of the connecting wall body 530 close to the lower end cover 510. Preferably, to make the filter smoothly inserted and installed in the pump shell and reduce the situation of jamming when the filter is inserted and assembled, the surface of the limiting portion 540 axially towards one end of the lower end cover 510 is designed as a circular arc.

[0020] See Figure 2 When the filter 500 of the centrifugal pump of the utility model needs to be assembled, in the process of inserting the filter 500 in the direction of the filter chamber 12, the limiting portion 540 is slid into the groove 33 along the first guide surface 31 and the second guide surface 32 under the action of the gravity of the filter 500 or the assembly force, and this assembly process does not need to align the filter before inserting and installing, and the assembly is simple and reliable, which is convenient for users to use.

[0021] As a preferred embodiment, see Figure 3 and Figure 4 At the same time, the plane of the axis L of the pump shell 300 and the midline of the groove 33 is A, and the first guide surface 31 and the second guide surface 32 in the embodiment are symmetrically arranged about the plane A. This design can guarantee the concentricity of the filter 500 when inserted and installed in the pump shell 300, so that the filter 500 is more smoothly inserted and installed in the pump shell 300.

[0022] Preferably, see Figure 5 , the pump shell 300 in the cross-sectional view of the surface through its axis and perpendicular to the axis of the water inlet pipe 320, the angle α of any tangent line with the first guide surface 31 and the horizontal line S ranges from 15° to 75°, and likewise, the angle of any tangent line with the second guide surface 3 and the horizontal line S ranges from 15° to 75° in the cross-sectional view of the surface through its axis and perpendicular to the axis of the water inlet pipe 320. The above design can reduce the resistance when the filter 500 is inserted into the pump shell 300 for assembly, and further improve the ease of assembly.

[0023] To avoid the limiting part 540 of the filter being stuck in the water inlet pipe 320 during the insertion and installation process, resulting in the installation not being in place. The centrifugal pump designed by the utility model is shown in Figure 5 , the profile of the water inlet pipe 320 of the pump shell 300 falls within the range of the profile of the first guide part 311 in the cross-sectional view of the surface through its axis and perpendicular to the axis of the water inlet pipe 320. Of course, in other embodiments, the profile of the water inlet pipe 320 of the pump shell 300 can also be designed to fall within the range of the profile of the second guide part 312.

[0024] The utility model is not limited to the above-mentioned embodiments, if various modifications or deformations of the utility model do not deviate from the spirit and scope of the utility model, provided that these modifications and deformations belong to the scope of the claims and equivalent technology of the utility model, the utility model also intends to include these modifications and deformations.

Claims

1. A micro centrifugal pump with filter assembly, comprising a pump body (100), a stator (200) fixed on the pump body, a pump shell (300) axially installed on the pump body, a rotor rotatably installed on the pump body, an impeller (400) and a filter (500), the pump shell (300) is provided with an impeller cavity (11) containing the impeller (400) and a filter cavity (12) containing the filter (500), the filter (500) comprises a lower end cover (510), an upper end cover (520), a connecting wall body (530) connecting the two and a limiting part (540) radially protruding from the connecting wall body, characterized in that: The pump shell (300) is located on the inner wall of the filter cavity (12) and is radially protruded to form a guide portion (310), the guide portion (310) comprises a first guide portion (311), a second guide portion (312) and a connecting portion (313) connecting the first guide portion (311) and the second guide portion (312), the circumferential adjacent area of the first guide portion (311) and the second guide portion (312) is formed with a groove (33) for inserting the limiting portion (540), and the side axially away from the impeller cavity (11) of the first guide portion (311) and the second guide portion (312) is respectively formed with a first guide surface (31) and a second guide surface (32), the first guide surface (31) and the second guide surface (32) are both in the shape of a hill slope gradually rising along the circumferential direction from one end and then gradually descending.

2. A micro centrifugal pump with filter assembly convenience as claimed in claim 1, wherein: The first guide surface (31) and the second guide surface (32) are symmetrically arranged with respect to the plane passing through the axis of the pump shell (300) and the center line of the groove (33).

3. A micro centrifugal pump with filter assembly convenience as claimed in claim 1, wherein: In the cross-sectional view of the pump shell (300) passing through the plane perpendicular to the axis of the water inlet pipe (320) and the axis of the pump shell (300), the angle between any tangent line of the first guide surface (31) or the second guide surface (32) and the horizontal line is in the range of 15°-75°.

4. A micro centrifugal pump with filter assembly convenience according to claim 1 or 2, characterized in that: The surface of the limiting portion (540) axially facing the one end of the lower end cover (510) is designed in the shape of a circular arc.

5. A micro centrifugal pump with filter assembly convenience as claimed in claim 1, wherein: In the cross-sectional view of the pump shell (300) passing through the plane perpendicular to the axis of the water inlet pipe (320) and the axis of the pump shell (300), the profile of the water inlet pipe (320) of the pump shell falls within the profile range of the first guide portion (311) or the second guide portion (312).

Images