Mechanical vacuum pump

A mechanical vacuum pump and pump body technology, applied in mechanical equipment, pumps, pump components, etc., can solve problems such as not meeting requirements, and achieve the effects of improving sound quality, reducing strength, and reducing percussion noise.

Active Publication Date: 2022-08-09
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

like Figure 4 As shown, it is the process capability of the sound pressure level corresponding to the frequency of the percussion feature, the average noise value is 15.23dB(A), and the process capability Ppk is -1.33, which does not meet the requirements

Method used

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Experimental program
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Effect test

Embodiment Construction

[0019] The following combined with the attachment is further explained to the present invention.

[0020] like Figure 5 and Image 6 In, in this embodiment, a mechanical vacuum pump, including pump body 1, exhaust valve tablet 2, and balcony 3. The pump body 1 has an exhaust cavity 7. Valve seat 8, the exhaust valve sheet 2 and the baffle 3 are installed on the exhaust valve seat 8 through a fixed screw 6, and also includes the pressure cavity 9 set on the back of the exhaust valve tablet 2 There is an exhaust hole 10; when the vacuum pump is exhausted, the gas enters the pressure cavity 9, and then enter the cylinder cap through the exhaust holes on the pressure cavity 9. During the exhaust process, the pressure in the pressure cavity 9 can continue to be greater than the pressure in the cylinder cap, so that the pressure on the back of the exhaust valve tablet 2 will not be reduced rapidly, so that the front and back pressure difference between the exhaust valve tablet 2 is less ...

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Abstract

The invention discloses a mechanical vacuum pump, comprising a pump body, an exhaust valve sheet and a baffle plate. The pump body has an exhaust cavity, an exhaust valve seat is arranged in the exhaust cavity, and the exhaust valve plate and The baffle is installed on the exhaust valve seat by fixing screws, and also includes a pressure-holding cavity arranged on the back of the exhaust valve sheet, and an exhaust hole is opened on the pressure-holding cavity; when the vacuum pump exhausts, the gas first enters the pressure-holding cavity , and then enter the cylinder head cover through the exhaust hole on the pressure holding chamber. The invention reduces the force of the exhaust valve sheet to knock on the baffle plate and the pump body, thereby reducing the knocking noise.

Description

Technical field [0001] The invention is a vacuum pump technology field, which involves a mechanical vacuum pump. Background technique [0002] The mechanical vacuum pump is widely used on the vehicle engine, providing real vacuum to the braking system. When meeting performance needs, it is often produced when the exhaust valve sheet is turned on / closed. The sound quality of the engine. [0003] At present, more engines have high -voltage fuel systems at idle speed, mechanical vacuum pumps, and valve sitting. Due to the difference in sound audio, the engine sound is relatively mixed and the sound is poor. The sound is imperative. However, the mechanical vacuum pump has the characteristics of performance requirements, internal rotation, and small structure. At present, the method of solving the sound of mechanical vacuum pumps is still from the type, but the optimized line will affect the performance of the vacuum pump. It needs to be redesigned and matched. The time cycle is long,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C29/12F04C29/06F04C25/02
CPCF04C29/124F04C29/12F04C29/06F04C25/02
Inventor 辜庆伟杨金才张尧李祥彭海胡刚傅云峰焦璐
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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