Shanghai vacuum pump accessories: the choice of the vacuum pump oil demand -

vacuum pump oil is a vacuum pump accessories, can promote the high-speed operation of the equipment, and when the choice must follow certain requirements.

Shanghai vacuum pump parts required in the oil pump with suitable viscosity, can make a fast start in low temperature, vacuum pump oil at high temperature pump has good sealing, and within the pump oil temperature rise is low. Excluding volatile components, in use process reduce the vacuum pump oil return rate.

2, saturated vapor pressure of saturated vapor pressure is one of the key indicators are more pump oil. In a thermostatic airtight container, gas liquid two phase to achieve the dynamic balance of pressure referred to as the saturated vapor pressure.

oil saturation vapor pressure should be as low as possible. Under the highest working temperature of the pump, it must still have enough low saturated vapor pressure, and must not exceed the limit of the vacuum pump pressure. Under the condition of the temperature of 60 ℃, it must be at least 6. 5 × 10- 5 kPa( Each elevated temperature 20 ℃, the saturation vapor pressure will drop an order of magnitude) 。 3,

limit total pressure and the limit pressure eventually total pressure, vacuum pump to produce all of the material ( Gas) The total pressure by skin thermocouple vacuum gauge, pressure gauge or measure. At present, foreign countries pay attention to the impact pressure test index.

limit pressure points: by vacuum gauge (compact mercury Michetmeter) The limit of the measurement of pump air pressure. The partial pressure of two stage rotary vane pump should be 6 x 10 - or less 5 kpa。 No more than an order of magnitude difference request. The difference between the two, the greater the pump oil contains the more volatile component, and the performance of the oil.

friction surface friction and wear, fatigue wear and corrosion wear are related to the smooth condition. High performance pump oil helps to inhibit corrosion and wear; Can effectively reduce the adhesive wear and fatigue wear; Fluid smoothing agent on the friction surface is clean, and can also reduce the friction and wear. Reduce the friction resistance in order to save energy and reduce wear to prolong mechanical life.

lower the temperature of the friction surface is an important function of smoothness. As it moves, a friction surface must limit friction for work. Limit the amount of friction all work is converted into heat. As a result, the friction surface temperature. Friction heat related to the smooth state. High viscosity of maximum heat, low heat minimum viscosity, the border of the frictional heat somewhere in between. As you can see, using appropriate viscosity vacuum pump oil not only can complete the smoothness of the liquid, reduce friction heat production, timely and frictional heat can be out of the pump body.