vacuum pump

A vacuum pump and vacuum technology, which is applied in the field of automotive parts, can solve the problems of high noise, high process requirements, and high manufacturing costs of rotary vanes, and achieve the effects of prolonging service life, reducing manufacturing costs, and avoiding reverse pumping costs

Active Publication Date: 2018-03-30
SHANGHAI ZHAOMIN POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When the rotary vane vacuum pump is running, it has the following defects: first, the rotation of the rotary vane tends to cause high noise; secondly, the high requirement for the mechanical strength of the rotary vane reduces the service life of the vacuum pump; thirdly, the rotary vane Type vacuum pumps are prone to back pumping after shutdown
The above defects limit the application of rotary vane vacuum pumps in the high-end field and affect the reliability of the braking system
[0005] For diaphragm and piston vacuum pumps, there are also disadvantages such as short continuous working time, complex structure, high manufacturing cost, and high process requirements.

Method used

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Effect test

Embodiment approach 1

[0037] The first embodiment of the present invention provides a vacuum pump, see figure 1 As shown, it includes a pump body 1 provided with a cavity, a partition 3 disposed in the cavity, and a vacuum generating mechanism 6 connected with the partition 3 .

[0038] Wherein, the partition 3 separates the cavity and forms the airtight vacuum chamber 2 . In this embodiment, the separator 3 may be a diaphragm or other partition structures. When the partition 3 is a diaphragm, its edge can be fixed on the inner wall of the pump body 1 , and the purpose of changing the volume of the vacuum chamber 2 can be achieved by using the ductility of the diaphragm. Because the diaphragm completely isolates the vacuum chamber 2 from the outside world, and it is fixedly connected with the inner wall of the pump body 1, it can effectively block the space inside and outside the chamber, thereby reducing or even avoiding the impact of impurities and dust drawn into the chamber. Possible influenc...

Embodiment approach 2

[0055] The second embodiment of the present invention provides a vacuum pump. The second embodiment is a further improvement of the first embodiment. The curvature of the curve formed by the position of the valley is greater than the curvature of the curve formed by the side wall 6312 from the position of the valley to the position of the peak.

[0056] In the process from peak to valley, the greater the curvature of the curve, the more intense the suction process of the vacuum pump. In the process from valley to peak, the smaller the curvature of the curve, the more gentle the exhaust process of the vacuum pump. A more vigorous suction process can better ensure the effect of vacuuming. And a relatively gentle exhaust process can reduce the impact on the inner wall of the vacuum chamber 2, reduce the strength requirement for the pump body 1, and prolong the life of the vacuum pump.

Embodiment approach 3

[0058] The third embodiment of the present invention provides a vacuum pump. The third embodiment is different from the first embodiment. The main difference is that in the first embodiment of the present invention, the retainer 633 is a spring, and the spring is Compression spring is also arranged in this vacuum chamber 2. However, in a third embodiment of the present invention, see figure 2 As shown, although the retainer 633 is also a spring, the spring is a tension spring and is arranged outside the vacuum chamber 2 .

[0059] In this embodiment, the spring still directly acts on the partition 3, but since the spring is arranged outside the vacuum chamber 2, the movement of the spring will not be affected by the particles, dust or oil sucked into the vacuum chamber 2 , so the life of the vacuum pump can be extended to a greater extent.

[0060] In addition, based on the same understanding, see image 3 As shown, it is also possible to make the driven shaft 62 not pass ...

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Abstract

The invention relates to the technical field of automotive parts and discloses a vacuum pump.The vacuum pump comprises a pump body provided with a cavity, a separating part arranged in the cavity and a vacuum producing mechanism connected with the separating part.The separating part separates the cavity so that an airtight vacuum chamber can be formed.The vacuum pump further comprises an air inlet one-way valve and an air outlet one-way valve which are arranged on the pump body and communicated with the vacuum chamber.The vacuum producing mechanism is used for driving the separating part to do reciprocating movement, and when the separating part moves, the volume of the vacuum chamber is increased or decreased; when the volume of the vacuum chamber is increased, air enters the vacuum chamber through the air inlet one-way valve, and when the volume of the vacuum chamber is decreased, air is discharged through the air outlet one-way valve.The vacuum pump has the advantages of being low in noise, long in service life, free of reverse pumping, low in cost and the like.

Description

technical field [0001] The invention relates to the field of automotive parts, in particular to an automotive vacuum pump. Background technique [0002] Vacuum pumps can be used in various fields. For example, for vacuum pumps used in automobile brake systems, there are various forms of vacuum pumps such as diaphragm type, rotary vane type, and piston type. Among them, the application of rotary vane type is the most common. . [0003] In the rotary vane vacuum pump, the rotor and the stator are installed eccentrically in the pump. The rotor is tangent to the fixed surface of the stator. In contact with each other, the pump chamber is divided into several variable volumes. Usually, the gap between the rotary vane and the pump chamber is sealed with oil, so the rotary vane vacuum pump is generally an oil-sealed mechanical vacuum pump. [0004] When the rotary vane vacuum pump is running, it has the following defects: first, the rotation of the rotary vane tends to cause hig...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): F04B37/14F04B39/10
CPCF04B37/14F04B39/10
Inventor李回城柳智平沈新峰伊世民
OwnerSHANGHAI ZHAOMIN POWER TECH CO LTD