Low-noise automobile electronic vacuum pump

An electronic vacuum pump, low-noise technology, used in pumps, parts of pumping devices for elastic fluids, and parts of rotary piston/oscillating piston pumps, etc. effect of noise

Active Publication Date: 2017-02-15
常州市东南电器电机有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] After the above-mentioned noise reduction component is installed on the vacuum pump, the measured noise is 69dB when the vacuum pump is working. Although it has the effect of noise reduction, it still cannot meet some vehicles with very high noise requirements.

Method used

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  • Low-noise automobile electronic vacuum pump
  • Low-noise automobile electronic vacuum pump
  • Low-noise automobile electronic vacuum pump

Examples

Experimental program
Comparison scheme
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Embodiment 1）

[0055] See figure 1 , the low-noise automotive electronic vacuum pump of the present embodiment includes a motor assembly 1, a support base 2, a pump chamber lower cover 3, a drive sleeve, a pump rotor 4, blades, a pump chamber 5, a pump chamber upper cover 6, and a sound-absorbing member 7. Pump body cover 8 and fixing pin. The pump chamber lower cover 3 , the driving sleeve, the pump rotor 4 , the blades, the pump chamber 5 , the pump chamber upper cover 6 , the sound-absorbing member 7 and the fixing pin are arranged in the pump body cover 8 . The lower cover 3 of the pump chamber, the drive sleeve and the pump rotor 4 are coaxially arranged with the output shaft of the motor assembly 1 .

[0056] The support base 2 is fixedly connected with the pump body cover 8 . The support base 2 is provided with an air inlet pipe 21 and an air outlet pipe 22 .

[0057] See Figure 2 to Figure 4 , The pump chamber lower cover 3 includes an air intake groove 31, a flow guide groove 3...

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PUM

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Abstract

The invention discloses a low-noise automobile electronic vacuum pump. The low-noise automobile electronic vacuum pump comprises a motor assembly, a supporting base, a pump chamber lower cover, a driving sleeve, a pump rotor, blades, a pump chamber, a pump chamber upper cover, a silencing part, a pump body cover and a fixing pin. Multiple air chambers evenly distributed in the circumferential direction of the cylinder wall of the silencing sleeve and a converging cavity located in the center are formed in the silencing part. The air chambers include the air inlet air chamber, the buffering air chamber and the air outlet air chamber according to functions. According to the above structure, air flow enters the silencing part from two exhaust ports in the pump chamber upper cover, air flow flowing out from each exhaust port and entering the silencing part sequentially passes through the buffering air chamber and the air outlet air chamber and is converged at the converging cavity after flowing out of the air outlet air chamber, the air flow flows out of an outlet of the converging cavity and flows out after being further buffered through the space between the silencing sleeve and the pump body cover, and finally, the air flow flows out of the silencing part and is exhausted from an air outlet pipe. By means of the structure of the air chambers and the converging cavity, an air way is lengthened, the air flow is buffered, and the effect of effectively lowering noise is achieved.

Description

technical field [0001] The invention relates to a vacuum pump, in particular to a low-noise electronic vacuum pump for vehicles. Background technique [0002] The electronic vacuum pump is an indispensable part of providing the vacuum source for the vacuum booster in the car, but the noise of the electronic vacuum pump is too loud when it is working, which seriously affects the quality and comfort of the electric car. [0003] In order to reduce the noise of the electronic vacuum pump, some technicians choose to install a soundproof cover outside the vacuum pump. For example, Chinese patent document CN 203257689 U (application number 201320177261.1) discloses a soundproof cover for an electric vacuum pump, which includes a soundproof cover body covered on the electric vacuum pump. The bracket below the electric vacuum pump is fixedly connected. The inner side of the soundproof cover body is provided with several sound-absorbing layers, and the sound-absorbing layers are so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C18/344F04C23/02F04C29/06
CPCF04C18/344F04C23/02F04C29/065F04C29/068
Inventor 李余芝全亚伟
Owner 常州市东南电器电机有限公司
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