Vacuum pump performance components and classification

Vacuum pump features:
Compared with other oil-sealed vacuum pump has the following characteristics:
1, the vacuum pump in a wide range of pressure has a larger pumping speed, can be used in a pressure environment, improve the efficiency of work to ensure that they can produce good work efficiency;
2, the rotor has a good geometric symmetry, so the vibration is small, stable operation. Between the rotor and the rotor and the shell are gaps, without lubrication, friction loss is small, can greatly reduce the drive power, enabling high speed;
Vacuum pump classification:
Vacuum pump is a rotary volumetric vacuum pump. Its structure is evolved from a Roots blower. First appearing in Germany in 1944, it was used as a mechanical booster pump to accommodate vacuum melting systems with large pumping speeds in the 10-1000 Pa pressure range. Vacuum pumps need to be used in a certain environment to ensure that the environment can be used in accordance with the normal way and principle of production and work to ensure that it can give full play to their good role and performance.
3, the vacuum chamber without oil seal and lubrication, can reduce the oil vapor on the vacuum system pollution; Unlike the traditional pump, jet pump at work without moving parts.
Jet pumps can be made from a wide variety of materials such as cast iron, steel, stainless steel, Hastelloy, titanium, enamel, glass, plastic and graphite, and can be made in a variety of sizes. Suction from 1 to 2000000 m3 / h, suction pressure to 10-2mbar, the size can be a few centimeters to 30 meters.
(1), a low-level vacuum pump to the atmosphere;
(2), the vacuum pump (mechanical booster pump);
(3), high vacuum multi-stage pump. The largest domestic use of the vacuum pump.
4, no compression of the vacuum pump cavity, no exhaust valve. The utility model has the advantages of simple structure and compact structure, and is insensitive to the dust and water vapor in the gas being drawn;
5, the compression ratio is low, the hydrogen extraction effect is poor;
6, the rotor surface is more complex shape of the curve cylinder, processing and inspection more difficult. Vacuum pump in recent years at home and abroad to get faster development. In smelting, petrochemicals, electrician, electronics and other industries have been widely used.
Vacuum pumps can be used in a certain environment, in accordance with the normal use of standards for production and use, in strict accordance with the instructions for use, in use can give full play to the role and performance, to ensure the use of the full value of the embodiment.
Vacuum pump classification methods and methods:
According to the vacuum pump working pressure range is divided into: The main principle of the jet pump is a high-speed jet nozzle to the liquid or gas to drive and accelerate the surrounding liquid, gas or solid. This movement leads to a mixture of drive and driven material. Jet speed decreases at diffuser and pressure increases.

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