CN217814007U

CN217814007U - Brushless centrifugal silent pump structure

Info

Publication number: CN217814007U
Application number: CN202222199260.9U
Authority: CN
Inventors: 王伟清
Original assignee: Changsha Topsflo Pump Technology Co ltd
Current assignee: Changsha Topsflo Pump Technology Co ltd
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2022-11-15
Anticipated expiration: 2032-08-19

Abstract

The utility model discloses a brushless centrifugal silent pump structure, which comprises a pump head, a pump body and a central shaft; the pump head is arranged on the pump body; the pump body is provided with a pump cavity; a hollow column for mounting a central shaft is arranged on the inner bottom surface of the pump cavity, and an injection molding layer is arranged between the outer circumference of the central shaft and the inner circumference of the hollow column; in this embodiment, the outer circumference of center pin, form annular heavy groove between the interior circumference of hollow post and the layer of moulding plastics, annular heavy groove can form keeps away empty position, prevent that cooperation department from having criticizing the cutting edge of a knife or a sword to produce, improve the concentricity of center pin and rotor structure, if there is criticizing the cutting edge of a knife or a sword, center pin and rotor structure complex concentricity also can the variation, produce with rotor shaft sleeve hole and terminal surface and interfere, thereby lead to the production of noise, and the epaxial draw-in groove of center can increase the center pin and mould plastics the cooperation stability on layer, prevent that the center pin is not hard up, improve the concentricity, further noise reduction.

Description

Brushless centrifugal silent pump structure

Technical Field

The utility model relates to a pump structure field, concretely relates to brushless centrifugal silence pump structure.

Background

The existing micropump is often used in household appliances requiring silence, such as cold and warm mattresses, therefore, the noise requirement on the pump structure is strict, and the main reason for the noise generation of the existing pump structure is as follows: 1. the concentricity of the matching structure of the shaft and the rotor is poor, and the shaft is easy to loosen, thereby causing noise; 2. the end surface and inner circumference friction surface of the shaft sleeve can not enter quickly to play a role in lubrication, so that the smooth degree of rotation is reduced, and noise is caused; 3. the pump head and the pump body are difficult to assemble, and the concentricity is poor, so that noise is caused.

In summary, there is a need for a brushless centrifugal silent pump structure to solve the problem of the prior art that the noise of the pump structure is large.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a brushless centrifugal silent pump structure to solve the big problem of pump structure noise among the prior art, concrete technical scheme is as follows:

a brushless centrifugal silent pump structure comprises a pump head, a pump body and a central shaft; the pump head is arranged on the pump body; the central shaft is arranged between the pump head and the pump body; the pump body is provided with a pump cavity; a hollow column for mounting a central shaft is arranged on the inner bottom surface of the pump cavity, and an injection molding layer is arranged between the outer circumference of the central shaft and the inner circumference of the hollow column; the injection layer and the end face of the hollow column have a height difference in the axial direction of the central shaft, so that an annular sink groove is formed between the outer circumference of the central shaft, the inner circumference of the hollow column and the injection layer; a clamping groove is formed in the central shaft; the clamping groove is located in the injection molding layer and is clamped with the injection molding layer.

The above technical solution is preferable, further comprising a rotor structure disposed in the pump chamber; the rotor structure comprises a rotor body and a shaft sleeve; the rotor body and the shaft sleeve are integrally formed; the rotor body and the shaft sleeve rotate around the central shaft.

Above technical scheme is preferred, all be provided with water drainage tank on the terminal surface of axle sleeve and the inner peripheral surface, water drainage tank on the inner peripheral surface sets up along the axial of axle sleeve, and water drainage tank on the terminal surface is linked together with the drainage on the inner peripheral surface.

According to the preferable technical scheme, a plurality of groups of positioning columns are arranged on the pump head; and the pump body is provided with positioning holes which correspond to the positioning columns one to one.

Above technical scheme is preferred, the circumference setting of multiunit reference column along the pump head.

Preferably, the depth of the annular sinking groove in the axial direction of the central shaft is 0.1-2.0mm.

Above technical scheme is preferred, still include the motor stator who sets up in the pump body.

Use the technical scheme of the utility model, following beneficial effect has:

(1) The structure of the brushless centrifugal silent pump of the utility model comprises a pump head, a pump body and a central shaft; the pump head is arranged on the pump body; the pump body is provided with a pump cavity; a hollow column for mounting a central shaft is arranged on the inner bottom surface of the pump cavity, and an injection molding layer is arranged between the outer circumference of the central shaft and the inner circumference of the hollow column; in this embodiment, the outer circumference of center pin, form annular heavy groove between the interior circumference of hollow post and the layer of moulding plastics, annular heavy groove can form the position of keeping away from the sky, prevent that cooperation department from having batch cutting edge of a knife or a sword to produce, improve the concentricity of center pin and rotor structure, if there is batch cutting edge of a knife or a sword, center pin and rotor structure complex concentricity also can the variation, produce with rotor shaft sleeve hole and terminal surface and interfere, thereby lead to the production of noise, and the epaxial draw-in groove of center can increase the center pin and the cooperation stability on the layer of moulding plastics, prevent that the center pin is not hard up, improve the concentricity, further noise reduction.

(2) The utility model discloses in, rotor body and axle sleeve are integral type injection moulding, can reduce the tolerance that the secondary was moulded plastics, have improved axle sleeve and center pin complex concentricity, the utility model discloses in, rotor structure's concentricity control is within 0.05mm, and dynamic balance control is < below 40mg, effective noise reduction to the water drainage tank of axle sleeve can make liquid entering axle and axle sleeve hole friction surface fast, increases rotor structure pivoted smooth and easy degree, further reduces the noise of product.

(3) The utility model discloses in, the three reference column of pump head design closely cooperates with the three locating hole of the pump body for relative skew can not take place after pump head and the pump body equipment, can also guarantee concentricity between them when can improve pump head and pump body assembly efficiency.

(4) The utility model discloses in, annular heavy groove depth is 0.1-2.0mm, when can avoiding center pin, the layer of moulding plastics and hollow column three cooperation department to produce and drape over one's shoulders cutting edge of a knife or a sword, can also guarantee the center pin and mould plastics the stability between the layer.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention.

In the drawings:

fig. 1 is a schematic sectional view of the structure of the brushless centrifugal mute pump of the present embodiment;

FIG. 2 is a partial schematic view of the annular sink of FIG. 1;

FIG. 3 is a schematic diagram of the pump head of FIG. 1;

FIG. 4 is a schematic view of the pump body of FIG. 1;

FIG. 5 is a schematic structural view of the rotor structure of FIG. 1;

FIG. 6 is an internal schematic view of the rotor structure of FIG. 1;

wherein, 1, pump head; 1.1, a positioning column; 1.2, matching columns; 2.a pump body; 2.a, a pump cavity; 2.b, annular sinking groove; 2.c, positioning holes; 2.1, a pump shell; 2.2, an isolation sleeve; 2.21, hollow column; 2.3, a pump cover; 3. a central shaft; 3.1, a clamping groove; 4. a rotor structure; 4.1, a rotor body; 4.2, a shaft sleeve; 4.21, a drainage groove; 5. a motor stator; p: and (5) injection molding the layer.

Detailed Description

The embodiments of the invention will be described in detail hereinafter with reference to the accompanying drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.

Example (b):

a brushless centrifugal silent pump structure, includes pump head 1, pump body 2, center pin 3, rotor structure 4 and motor stator 5, as shown in fig. 1-6, specifically as follows:

as shown in fig. 1 and 4, the pump body 2 includes a pump casing 2.1, an isolation sleeve 2.2 and a pump cover 2.3; the separation sleeve 2.2 is arranged on the pump shell 2.1, the separation sleeve 2.2 is of an inwards concave structure, the inwards concave part of the separation sleeve 2.2 forms a pump cavity 2.a (hereinafter referred to as a first pump cavity), the pump cover 2.3 is arranged on an opening at the lower end of the pump shell 2.1, and a second pump cavity is formed among the pump cover 2.3, the inside of the pump shell 2.1 and the separation sleeve 2.2.

As shown in fig. 3, the pump head 1 is disposed at the upper end of the pump body 2 (specifically, on the pump housing 2.1), and the assembly form between the pump head 1 and the pump body 2 is: the one side of pump head 1 towards the pump body 2 is provided with reference column 1.1, is provided with the locating hole 2.c with reference column 1.1 one-to-one on the pump body 2, and reference column 1.1 inserts and realizes the location between the pump head 1 and the pump body 2 in the locating hole 2.c, and the rethread screwed fitting is connected pump head 1 and the pump body 2, and in this embodiment, reference column 1.1 is provided with three groups along the circumference equidistance of pump head 1, and locating hole 2.c also is provided with three groups.

As shown in fig. 1, the central shaft 3 is cylindrical, the inner bottom surface of the first pump cavity 2.a is provided with a hollow column 2.21, the central shaft 3 is coaxially inserted into the hollow column 2.21, and an injection layer P (i.e., the reference numeral P) is provided between the inner circumference of the hollow column 2.21 and the outer circumference of the central shaft 3, and further, the hollow column 2.21 and the central shaft 3 are integrally injection-molded.

As shown in fig. 2, there is a height difference between the upper top surface of the injection layer P and the end surface of the hollow column 2.21 in the axial direction (i.e. the axial direction of the central shaft), so that an annular sunken groove 2.b is formed between the outer circumference of the central shaft 3, the inner circumference of the hollow column 2.21 and the upper top surface of the injection layer P, and the annular sunken groove 2.b can prevent flash from being generated by injection. In this embodiment, the depth of the annular recess 2.b in the axial direction of the central shaft 3 is preferably 0.1mm to 2.0mm.

As shown in fig. 1, still be provided with draw-in groove 3.1 on the center pin 3, draw-in groove 3.1 is located hollow post 2.21, and draw-in groove 3.1 also is located the layer P of moulding plastics promptly, and draw-in groove 3.1 and the layer P block of moulding plastics can improve the stability of center pin 3.

As shown in fig. 1, the upper end of the central shaft 3 is matched with the pump head 1, and the specific matching form is as follows: be provided with cooperation post 1.2 on the pump head 1, cooperation post 1.2 is also hollow, and the hole cover of cooperation post 1.2 is established on the outer circumference of center pin 3, and clearance fit between the hole of cooperation post 1.2 and the center pin 3, and stability is good, and it is convenient to install.

As shown in fig. 1, 5 and 6, the rotor structure 4 is arranged in the first pump chamber 2.a, in particular, the rotor structure 4 is located between the pump head 1 and the first pump chamber 2.a; the rotor structure 4 comprises a rotor body 4.1 and a shaft sleeve 4.2; the rotor body 4.1 and the shaft sleeve 4.2 are integrally formed by injection molding; the shaft sleeve 4.2 is coaxially sleeved on the outer circumference of the central shaft 3; in this embodiment, the upper end surface of the sleeve 4.2 (i.e. the end surface close to the pump head 1) is provided with a water drainage groove 4.21, the inner circumferential surface of the sleeve 4.2 is also provided with a water drainage groove 4.21, the water drainage groove 4.21 on the inner circumferential surface of the sleeve 4.2 is opened along the axial direction of the sleeve 4.2, and the water drainage groove 4.21 on the upper end surface of the sleeve 4.2 is communicated with the water drainage groove 4.21 on the inner circumferential surface of the sleeve 4.2, so that liquid can rapidly enter the friction surface of the central shaft and the inner hole of the sleeve. The rotor body 4.1 is referred to the prior art.

As shown in fig. 1, the motor stator 5 is disposed in the second pump cavity 2.a, and the motor stator 5 is used for driving the rotor structure 4 to rotate, which is the prior art and is not described in detail in this embodiment.

In this embodiment, the pump head 1, the pump case 2.1, the central shaft 3, the rotor structure 4 (specifically, the shaft sleeve 4.2), the spacer sleeve 2.2, the hollow column 2.21, the matching column 1.2, and the pump cover 2.3 are all coaxially arranged.

The working principle of the brushless centrifugal silent pump structure in the embodiment is as follows:

the motor stator 5 drives the rotor structure 4 to rotate, and the rotor structure 4 drives liquid to be sucked from an axial inlet on the pump head 1 and output through a circumferential outlet.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A brushless centrifugal silent pump structure is characterized by comprising a pump head (1), a pump body (2) and a central shaft (3);

the pump head (1) is arranged on the pump body (2); the central shaft (3) is arranged between the pump head (1) and the pump body (2);

the pump body (2) is provided with a pump cavity (2.a); a hollow column (2.21) for mounting the central shaft (3) is arranged on the inner bottom surface of the pump cavity (2.a), and an injection molding layer (P) is arranged between the outer circumference of the central shaft (3) and the inner circumference of the hollow column (2.21); the injection layer (P) and the end surface of the hollow column (2.21) have a height difference in the axial direction of the central shaft (3), so that an annular sunken groove (2.b) is formed between the outer circumference of the central shaft (3), the inner circumference of the hollow column (2.21) and the injection layer (P);

a clamping groove (3.1) is arranged on the central shaft (3); the clamping groove (3.1) is positioned in the injection molding layer (P), and the clamping groove (3.1) is clamped with the injection molding layer (P).

2. The brushless centrifugal silent pump structure according to claim 1, characterized by further comprising a rotor structure (4) arranged inside the pump chamber (2.a); the rotor structure (4) comprises a rotor body (4.1) and a shaft sleeve (4.2); the rotor body (4.1) and the shaft sleeve (4.2) are integrally formed; the rotor body (4.1) and the shaft sleeve (4.2) rotate around the central shaft (3).

3. The structure of the brushless centrifugal silent pump according to claim 2, characterized in that the end face and the inner circumferential face of the bushing (4.2) are provided with drainage grooves (4.21), the drainage grooves on the inner circumferential face are arranged along the axial direction of the bushing (4.2), and the drainage grooves on the end face are communicated with the drainage on the inner circumferential face.

4. A brushless centrifugal silent pump structure according to any of claims 1-3, characterized in that said pump head (1) is provided with a plurality of sets of positioning posts (1.1); and the pump body (2) is provided with positioning holes (2.c) which correspond to the positioning columns (1.1) one to one.

5. The brushless centrifugal silent pump structure of claim 4, characterized in that multiple sets of positioning posts (1.1) are arranged along the circumference of the pump head (1).

6. The brushless centrifugal silent pump structure of claim 1, characterized in that the depth of said annular countersink (2.b) in the axial direction of the central shaft (3) is 0.1-2.0mm.

7. The brushless centrifugal silent pump structure according to claim 1, characterized in that it further comprises a motor stator (5) arranged inside the pump body (2).