A vacuum is a gas in which the molecular density of a gas is lower than the standard pressure. The degree of vacuum is a measure of the thinness of a gas, and its most direct physical quantity should be the number of molecules per unit volume. But because of the history, the vacuum is usually exp...

In the damage of the parts of the water ring vacuum pump, the damage of the shaft occupies a large proportion. Damage to pump shaft includes bending, crack and fracture. The reason of the pump shaft bending is mostly due to the lack of stiffness of the sleeve, coupled with the large imbalance of ...

The vacuum pump can exhaust and reduce the system pressure to a very low vacuum state is its essential function. The vacuum pumps commonly used in the refrigeration industry are similar to rotary plaiting machines. These deep vacuum pumps are all two-stage rotary vacuum pumps, which can reduce th...

All parts of rotary vane vacuum pump are immersed in vacuum oil, also known as oil seal vane vacuum pump, as shown in figure 1. The vacuum pump studio is located in the oil tank, and the inlet pipe is connected with the pump room. The rotor is installed eccentrically in the pump room. There are t...

If the centrifugal and helical slurry pumps deliver air instead of drip-like liquids, it is still impossible to produce significant vacuum. So before starting, these pumps should be filled with liquid. To inject liquid into a pump, a return pressure van is usually placed on the head of the suctio...

The extraction of excrement or sludge turbid water from fecal ponds or sewers in cities is to use fecal pumps or sewage pumps to pump fecal or sludge turbid water into the fecal tanks or sludge tanks. Such absorption method is not very sanitary and convenient, resistance is through the pump shell...

Water ring vacuum pump adopts single-stage single-acting structure, which has the advantages of simple structure, convenient maintenance, reliable operation, high efficiency and energy saving, and can adapt to the bad working conditions such as large displacement and fluctuation of load impact. V...

Rotary vane vacuum pump is a kind of vacuum pump equipment with mandatory oil prohibition. It has solved the problems of oil return and oil injection well, and has been recognized by a large number of users. This rotary vane vacuum pump has the following characteristics. 1. Fully sealed structur...

A machine used to absorb gases under an absolute pressure of less than one atmosphere is called a vacuum pump. The vacuum filter of the concentrator, the large water pump (before starting) all need to use the vacuum pump to extract the air. A vacuum pump is a compressor that sucks gas out of thin...

In the vacuum electron beam welding machine, roots pump is often used in the vacuum system as the booster pump for differential pumping. roots pump is a two-rotor volumetric molecular pump. Besides volume action, the working principle of molecular pump is also applied. Under high pressure, becaus...