CN210565063U

CN210565063U - Low-noise vane pump

Info

Publication number: CN210565063U
Application number: CN201921163858.4U
Authority: CN
Inventors: 万丕金
Original assignee: Zhejiang Keboda Industrial Co ltd
Current assignee: Zhejiang Keboda Industrial Co ltd
Priority date: 2019-07-23
Filing date: 2019-07-23
Publication date: 2020-05-19
Anticipated expiration: 2029-07-23

Abstract

A low-noise vane pump comprises a pump shell, wherein the pump shell comprises a pump body and a pump cover, and the pump body and the pump cover are connected with each other. The end face of the pump body close to one end of the pump cover is provided with a first outlet distribution groove, the first outlet distribution groove is provided with a starting end and a tail end, and the width of the starting end of the first outlet distribution groove is gradually increased from the outer side to the inner side. Compare with current impeller pump, the utility model discloses reduced the noise that impeller pump sent at the during operation.

Description

Low-noise vane pump

Technical Field

The utility model relates to a vane pump.

Background

The vane pump mainly comprises a pump shell, a rotor, a plurality of vanes, a support ring, a control ring, a rotating pin and the like. The pump casing is composed of a pump body and a pump cover which are butted with each other, and the rotor has a rotation axis which is deviated from the central axis of the control ring. One end of each vane is slidably disposed in the rotor slot and the other end abuts the inner surface of the control ring. Each adjacent two of the vanes, the rotor, and the inner surface of the control ring collectively define a working chamber. When the rotor rotates from the oil suction side (low pressure side) to the oil discharge side (high pressure side), the plurality of blades also rotate along with the rotor, the volume of the working chamber can change, oil is sucked from small to large and then is pressed from large to small, and the rotor rotates for a circle to finish oil suction and oil discharge once.

The pump cover end face of most vane pumps is also provided with a second outlet flow distribution groove which is mirror-symmetrical to the first outlet flow distribution groove. Fig. 6 shows the shape of the first outlet distribution groove of the prior vane pump. As shown in fig. 6, the first outlet distribution groove 91 has a start end 911 and a tail end 912, and the start end 911 is located upstream in the rotor rotation direction than the tail end 912 and thus receives the oil pressed into the working chamber before the tail end 912. The width of the starting end 911 of the conventional first outlet distribution groove does not change from the outer side to the inner side, and since the starting end 911 is located in a region where low pressure is transited to high pressure, such a shape of the starting end 911 causes sudden fluctuation of pressure, causing a large impact force to the blade, thereby increasing noise.

In addition, a plurality of blade grooves on the rotor of the existing vane pump are uniformly distributed along the circumferential direction, noise can be superposed due to the structure, sound energy is more concentrated, and therefore the noise generated when the vane pump works is increased.

Disclosure of Invention

The utility model aims to solve the technical problem that a low noise impeller pump is provided, compare with current impeller pump, it has reduced the noise that impeller pump sent at the during operation.

The embodiment of the utility model provides a low-noise vane pump, which comprises a pump shell, wherein the pump shell comprises a pump body and a pump cover, and the pump body is connected with the pump cover; the end face of the pump body close to one end of the pump cover is provided with a first outlet distribution groove, the first outlet distribution groove is provided with a starting end and a tail end, and the width of the starting end of the first outlet distribution groove is gradually increased from the outer side to the inner side.

In the vane pump with low noise, a lower edge of the starting end of the first outlet distribution groove extends obliquely downward along the axial direction of the pump body to form an inclined surface.

After the technical scheme is adopted, the utility model discloses following advantage and characteristics have at least:

1. in the embodiment, the width of the starting end of the first outlet distribution groove is gradually increased from the outer side to the inner side, so that the oil pressure change during high-low pressure transition inside the oil pump is in a gradual change state, the impact force on the blades is reduced, and the overall noise of the vane pump is reduced;

2. the inclined plane structure of the starting end of the first outlet distribution groove can further slow down the sudden change of oil pressure during the transition of high pressure and low pressure in the oil pump, so that the noise of the vane pump is reduced;

3. the blade grooves on the rotor are distributed non-uniformly along the axial direction, so that the frequency of high-pressure impact blades in the oil pump is staggered, order noise is not superposed, and the noise quality of the oil pump is improved.

Drawings

Fig. 1 shows the overall structure schematic diagram of the low-noise vane pump after the pump cover is removed according to the present invention.

Fig. 2 shows a schematic structural diagram of a pump body of a low-noise vane pump according to an embodiment of the present invention.

3 fig. 3 3 3 shows 3 a 3 schematic 3 section 3 a 3- 3 a 3 of 3 fig. 32 3. 3

Fig. 4 shows a schematic structural diagram of a pump cover of a low-noise vane pump according to an embodiment of the present invention.

Fig. 5 shows a schematic structural diagram of a rotor of a low noise vane pump according to an embodiment of the present invention.

Fig. 6 shows the shape of the first outlet distribution groove of the conventional vane pump.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Please refer to fig. 1 to 4. According to the utility model discloses a low noise impeller pump includes pump case 1, rotor 2, a plurality of blade 3, support ring 4, control ring 5 and rotatory round pin 6.

The pump case 1 includes a pump body 11 and a pump cover 12, and the pump body 11 and the pump cover 12 are connected to each other. The end face of one end, close to the pump cover 12, of the pump body 11 is provided with a first outlet distribution groove 13, and the first outlet distribution groove 13 is communicated with an engine oil outlet 17 of the vane pump. The first outlet distribution groove 13 has a starting end 131 and a terminal end 132, and the starting end 131 is located upstream in the rotor rotation direction than the terminal end 132, and the rotor rotation direction is clockwise in fig. 1.

One of the main differences between the shape of the first outlet distributing groove of the present application and the shape of the existing outlet distributing groove is that the width of the starting end 131 of the first outlet distributing groove 13 gradually increases from the outside to the inside (from left to right in fig. 2), and this structure makes the oil pressure change in the oil pump during the high-low pressure transition in the oil pump be in a gradual change state, so as to reduce the impact force on the vane 3 and reduce the overall noise of the vane pump.

in this embodiment, the starting end of the first outlet distribution groove is acute, and the included angle α between the upper edge 1311 and the lower edge 1312 of the starting end 131 of the first outlet distribution groove 13 is 25 ° to 30 °.

further, as shown in fig. 3, the lower side edge 1312 of the starting end 131 of the first outlet distributing groove 13 extends downward along the axial direction of the pump body to form an inclined plane a, and the included angle β between the inclined plane a and the horizontal plane is 5 ° to 10 °.

In this embodiment, as shown in fig. 4, a second outlet distribution groove 14 is provided on an end surface of the pump cover 12 near one end of the pump body 11, and the second outlet distribution groove 14 is mirror-symmetrical to the first outlet distribution groove 13.

Fig. 5 shows a schematic structural diagram of a rotor of a low noise vane pump according to an embodiment of the present invention. Referring to fig. 5, a plurality of blade grooves 21 for mounting the blades 3 are provided at intervals in the circumferential direction of the rotor 2, and the plurality of blade grooves 21 are unevenly distributed in the circumferential direction. In the present embodiment, the number of the vane grooves 21 is seven, a vane groove included angle is formed between every two adjacent vane grooves, and seven vane groove included angles formed by the seven vane grooves 21 sequentially correspond to: 51 degrees +/-3 degrees, 49 degrees +/-3 degrees, 54 degrees +/-3 degrees and 54 degrees +/-3 degrees. In the example of fig. 5, seven blade grooves 21 form seven blade groove angles in the order of: 51 °, 49 °, 54 °.

The blade grooves on the rotor are distributed non-uniformly along the axial direction, so that the frequency of high-pressure impact blades in the oil pump is staggered, order noise is not superposed, and the noise quality of the oil pump is improved.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A low-noise vane pump comprises a pump shell, wherein the pump shell comprises a pump body and a pump cover, and the pump body and the pump cover are connected with each other; the end face of the pump body, which is close to one end of the pump cover, is provided with a first outlet distribution groove, and the first outlet distribution groove is provided with a starting end and a tail end.

2. The low noise vane pump of claim 1, wherein the starting end of the first outlet distribution groove is acute-angled.

3. the vane pump as claimed in claim 2, wherein the angle α between the upper and lower edges of the starting end of the first outlet distribution groove is 25 ° to 30 °.

4. The low-noise vane pump according to any one of claims 1 to 3, wherein a lower side edge of the starting end of the first outlet distribution groove extends obliquely downward in the axial direction of the pump body to form a slope.

5. the low noise vane pump of claim 4, wherein the angle β between the inclined surface and the horizontal plane is 5 ° to 10 °.

6. The low-noise vane pump as claimed in any one of claims 1 to 3, wherein a second outlet distribution groove is provided on an end surface of the pump cover near one end of the pump body, and the second outlet distribution groove is mirror-symmetrical to the first outlet distribution groove.

7. The low noise vane pump of claim 1, comprising a rotor having a plurality of vane grooves for mounting vanes circumferentially spaced, the plurality of vane grooves being unevenly distributed in a circumferential direction.

8. The low noise vane pump of claim 7, wherein the number of the vane grooves is seven, and a vane groove included angle is formed between every two adjacent vane grooves;

seven blade groove contained angles that seven blade grooves formed do in proper order along the direction of rotation of rotor: 51 degrees +/-3 degrees, 49 degrees +/-3 degrees, 54 degrees +/-3 degrees and 54 degrees +/-3 degrees.

9. The low noise vane pump of claim 8, wherein seven vane groove angles formed by the seven vane grooves are, in order along the rotation direction of the rotor: 51 °, 49 °, 54 °.