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Reading is a way of the operation of the vacuum pump can get4 _
it is very important to vacuum pump mechanical equipment, widely used in the production, there are many kinds of them. Do you know about the working principle of different types of vacuum pump? The following are a few small vacuum pump series, this paper introduces the characteristics of the vacuum pump, working principle and the range.
1。 Screw vacuum pump
the characteristics of the screw vacuum pump: in addition to the common characteristics of positive displacement pump, screw pump has a continuous, axial flow pulsation is small, the internal low speed and the possibility of mixed more air and other gas. Many applications of liquid mixing and the application of rotary.
scope of application: widely used in petroleum, chemical industry, chemical fiber, power, offshore engineering, shipbuilding, precision machine tools, food and other industrial sectors.2。
the gear pump gear water pump features:
( 1) 。 Simple structure, low cost;
( 2) 。 Job requirements is low, the application range is extensive;
( 3) 。 An end cover and the clearance between the gear form some fixed seal cavity, can only be used as a quantitative water pump;
( 4) 。 Light weight, good in usability, low prices, strong self-priming, is not sensitive to oil pollution, wide speed range, the shock load, convenient maintenance, reliable operation;
( 5) 。 Unbalanced radial force, arterial flow is big, big noise and low efficiency, poor parts interchangeability, difficult to repair after wear, cannot be used as variable pump. Scope:
general transport oil, such as oil and lubricating oil; Used in the machinery industry of medium speed, low power hydraulic system and the lubricating oil system as the auxiliary oil pump; Suitable for chemical industry for conveying high viscosity material, such as nylon, polyethylene, polypropylene and other molten resin.
3。 Vane water pump
vane pump features: output flow more uniform than gear pump, stable running, low noise; High working pressure, high volumetric efficiency, single-acting vane pump is easy to realize the flow control, double-acting vane pump by the rotor radial fluid pressure balance. A long life. But the vane pump self-priming ability is poor, is sensitive to oil pollution, the blade easily blocked by impurities, working poor reliability; Complex structure, the production of high precision and high cost. Applicable occasions: applicable to medium viscosity of the liquid.4。 Rotary vane vacuum pump
rotary vane vacuum pump work features: small volume, light weight, low noise; With the gas ballast valve, can remove a small amount of water vapor; At 5 degrees Celsius and 40 degrees Celsius temperature range, the inlet pressure is less than 1. 3×103Pa。 On this condition, allowing the long-term continuous operation. When pumping gas relative humidity is more than 90%, should open the valve; Provide automatic oil return check valve, easy to start; Air inlet can be in continuous operation in the atmosphere is not more than a minute. It is not suitable for removal of metal corrosive, vacuum pump oil chemical reactive gas, gas containing dust particles, and oxygen, high explosive or toxic gases.
vacuum pump is widely used in metallurgy, machinery, military industry, electronics, chemical industry, light industry, petroleum, medicine and other production and scientific research departments.
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