The characteristics and structure of vacuum pump -

by:J&T     2020-05-29
The characteristics of the vacuum pump

( 1) In a wide range of pressure greater pumping speed;

( 2) Good rotor geometry symmetry, small vibration, stable running. Between the rotor and clearance between rotor and shell, do not need lubrication, friction loss is small, can greatly reduce the driving power, higher speed;

( 3) Vacuum pump room does not need to seal and lubrication, can reduce the pollution of oil on the vacuum system of steam;

( 4) room no compression or exhaust valve. Simple and compact structure, is not sensitive to pumping gas of the dust and water vapor.

( 5) Compression is relatively low, the impact on hydrogen extraction is poorer;

( 6) For complex surface, the cylinder is in the shape of the rotor surface processing and testing.

(vacuum pump structure 1) The overall structure of the pump type

vacuum water pump to the layout of the pump body structure determines the overall structure of the pump.

the vertical structure of inlet and outlet horizontal layout, easy assembly and connection pipe. However, this kind of pump high center of gravity, high-speed stability, so this kind of pump is mainly used for small pump.

, above the entrance to the horizontal pump export below. Sometimes, vacuum system to facilitate pipeline installation and connection, vent can from the horizontal connections, the air intake and exhaust direction perpendicular to each other. At this point, the vent can be opened from the left or the right direction, and in addition to one end of the exhaust pipe, another end is blocked or connected to the bypass valve. When the pump low center of gravity, high-speed stability is good. In general, large and medium-sized pump all adopt the structure.

the two rotor axis perpendicular to the horizontal plane of the pump installation. The structure of the assembly clearance is easy to control, the rotor assembly is convenient, pump cover an area of an area small. However, pump high center of gravity, gear, dismantling inconvenient, lubrication mechanism is relatively complex.

( 2) transmission way

the two vacuum pump rotor through a pair of high precision gear relative to run synchronously. The drive shaft through the shaft coupling and motor connection. Transmission structure mainly has two types: one is the motor and gear placed on the same side of the rotor is shown in figure. Directly driven by the end of the motor rotor gear drive, drive rotor shaft torsional deformation is small, the gaps between the rotor will not happen because the drive shaft torsional deformation is great changes, so that the clearance between the rotor even at runtime. The biggest drawback is the drive for: a. Three shaft bearings, increased the difficulty of processing and assembling of the pump, removal and adjustment of the gear is not convenient; b。 The center of gravity of the overall structure is not symmetrical, pump to motor and gear box.

the present situation of the vacuum pump

vacuum pump is a kind of quantity, wide range, high yield, low output value of the product, but it really is a kind of indispensable base product, directly affect the quality and performance of the whole vacuum equipment. The vacuum pump market dynamic change according to user needs. Market growth of the main driving force comes from the rapid development of semiconductor industry and dry pump and molecular pump application field expands unceasingly.

at present, the global vacuum pump market with annual sales of about $2 billion, the annual growth rate of about 7%.

China has many vacuum pump manufacturers. All the annual sales of about 1 vacuum pump. Only 500 million yuan, equivalent to a vacuum pump company annual sales in the United States. Through the analysis of global vacuum water pump market, we can see all kinds of vacuum pump market and application fields are constantly changing and developing. The Chinese vacuum pump manufacturing has a long history and strong foundation. Domestic vacuum pump is applied in various fields and validated. Some pump also exported to foreign countries, the foreign user recognition and praise. It should be said that the Chinese vacuum pump manufacturing industry at home and abroad market still has great development space.

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