Liquid ring vacuum pump structure and working principle of _

Liquid ring vacuum pump structure and working principle of

liquid ring vacuum pump is a kind of coarse pump using liquid as working medium. Water ring vacuum pump is used as the working medium, also can use the other work of oil, such as oil, sulfuric acid and acetic acid. Mainly use industrial water ring vacuum pump.

liquid ring vacuum pump with single stage, double stage, the application of single and double action. Single stage and two stage refers to the vacuum pump impeller series; Single/double action refers to the impeller/shell, in the form of single-acting vane vacuum pump impeller rotation, the gas through a suction/discharge; Double-acting pump impeller rotates. Suction and discharge two gases.

using a vacuum pump, need to pay attention to the following:

1. Vacuum pump working pressure should satisfy the limit of vacuum equipment vacuum and work pressure requirements. For example, vacuum coating need 1 x 10 - 5 MMHG vacuum and the vacuum degree of vacuum pump is to be at least 5 x 10 selected - 6mmHg。 The vacuum pump usually choose for half of the order of magnitude higher than vacuum vacuum equipment.

2。 Correct selection of vacuum pump working point. Each pump has a certain working pressure range, such as: diffusion pump for 10 - 3 ~ 10 - 7mmHg。 In such a wide range of pressure, pump pumping speed changing with pressure, its stable working pressure in the range of 5 x to 10. - - - - - - 4〜5×10- 6mmHg。 As a result, the working point of the pump should be within the scope of the choice, should not be in 10 - Working long hours under 8 MMHG. Another example is the titanium sublimation pump can be 10 - Work under 2 MMHG, but its working pressure should be less than 1 x 10 - 5mmHg。

3。 Under the working pressure, vacuum pump should be able to remove all gas produced in the process of vacuum equipment.

4。 The right combination vacuum water pump. Due to the selective pumping vacuum pump, sometimes can not meet the requirement of the pump, pump and multiple pump combinations are needed to complement each other in order to meet the pumping requirements. For example, titanium sublimation pump for hydrogen gas with high pumping speed, but it can't pump and three pole sputtering ion pump ( Or double was asymmetrical cathode sputtering ion pump) The argon pumping speed. Combined, vacuum unit will have a better vacuum. In addition, some of the vacuum pump can't work under atmospheric pressure, to a vacuum; Some vacuum pump outlet pressure is lower than the atmospheric pressure, need backing pump, so you need to pump together.

5。 Vacuum equipment demand for oil. If equipment strict with oil free, should choose a variety of oil pump, such as water ring pump, molecular sieve adsorption pump, sputter ion pump, cryogenic pump, etc. If not strict, you can choose to have an oil pump, add some oil measures, such as add cold trap, baffle, the oil well, etc. , can also meet the requirements of clean vacuum.

6。 Understand to pumping gas composition. The gas contains no condensation of steam, no particles of dust, no corrosion. Choosing a vacuum water pump, you need to know the gas composition and select suitable pumping gas pump. If the steam is contained in the gas, particles and corrosive gas, please consider condenser installed in the pump inlet pipe, dust collector and other auxiliary equipment.

7。 From the vacuum pump discharge of oil vapor how to affect the environment? If you don't allow pollution environment, you can choose oil-free vacuum pump or the oil vapor emission outside.

8。 Vacuum water pump vibration of the work has no effect on the process and the environment. If the process is not allowed, please choose no vibration pump or vibration control measures.

9。 The price of the vacuum pump, operation and maintenance cost

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