Open the phone to search, you see most of the answers are: extract the gas molecules from the vacuum chamber, reduce the gas pressure in the vacuum chamber, so that it reaches the required vacuum level.
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After reading such an answer, you are still full of doubts, feeling that such an answer will not solve your question.
Yes, the role of the vacuum pump is difficult to summarize in one sentence.
We can divide it into four aspects to understand.
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First, the negative pressure is generated
In this respect, the role of the vacuum pump is to generate negative pressure. Devices and equipment using mechanical, physical, chemical or physical chemical methods to extract the pumped container to obtain vacuum. In layman's terms, a vacuum pump is a device that uses various methods to improve, generate and maintain vacuum in an enclosed space.
Second, increase the braking force
The vacuum pump output is mainly the pressure generated by the power servo system, but when it cannot work normally, it can still be driven by human power to drive the hydraulic system and play a role in helping. The role of automotive vacuum pumps is mainly manifested in increasing the braking force.
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Third, reduce the gas pressure in the vacuum chamber
From this point of view, the role of the vacuum pump is to extract gas molecules from the vacuum chamber, reduce the gas pressure in the vacuum chamber, and make it reach the required vacuum level. For example, when used in the field of vacuum pump packaging, this role is particularly obvious.
Fourth, Extraction of acid gases
This role is mainly reflected in the petrochemical, pharmaceutical, food processing and metallurgical manufacturing industries. Vacuum pumps extract acidic gases and flammable and explosive gases.
In other areas not mentioned, the role of the vacuum pump in it is mainly to improve, generate or maintain the vacuum level of a certain enclosed space, one or more of these effects, or a combination of multiple effects.