Rotary vane vacuum pump used in the vacuum filter _

this paper mainly introduces the application of rotary vane vacuum pump in the vacuum filter content. Next is a small series, in order to understand why vacuum filter selection rotary-vane vacuum water pump. Concentrator and large water pump vacuum filter ( Before the start of) Need the air to draw vacuum pump. Because the vacuum pump is a kind of compressor, it out of thin air space in gas and its emissions into the atmosphere. Usually, its suction gas pressure below atmospheric pressure, Recent manufacturing vacuum pump can make 1 x 10 - residual pressure in the container 15 mm silver pillar) And the gas pressure slightly above atmospheric pressure.

vacuum pump has reciprocating vacuum pump, rotary vane vacuum pump, etc. , its action principle will be described later.

at present, the vacuum pump used in the concentrator with a rotary vane vacuum pump. Rotary vane vacuum pump only from a certain space ( Such as the air filter) Inhalation of air, can take time to 98%. Wet air pump sucked out with air liquid, can drain is 85%. In order to make the vacuum pump to maintain a certain volume and cooling, the water must be continuous cycle. To pump water, set up special water tank is connected to the discharge pipe, and set the gate valve to adjust the circulating water in water tank. The used water and air in the box together. To avoid blade face wear and tear, there should be no inclusion of the circulating water, otherwise the blade will wear and tear, pumping quantity to reduce with the increase of the amount of wear, wear in general should not exceed 0. 1 mm.

the working principle of rotary vane vacuum pumps, rotary vane pump is mainly composed of stator and rotor, vane, fixed cover and spring. Structure is installed in the cavity of the stator rotor eccentricity ( The inner surface of the outer periphery of the rotor and stator gap between the very small) And the rotor slots in the sliding wall closely attached received. The stator by the spring tension and the influence of centrifugal force. When the rotor rotates, the two always along the stator inner surface sliding rotating parts.

two rotary vane of the rotor, stator inner cavity and fixed guy surrounded by crescent-shaped space is divided into three parts A, B and C. When the rotor along the direction of rotation shown in the space of A volume and increasing suction, A decrease of the pressure inside the space. When the pressure in A space below the water pump when the pressure in the container, according to the principle of air pressure balance, pumping gas in the continuous suction chamber of A. When inhaled. B cavity space volume decreases, the pressure increase, now in the compression process. And vent connected space C volume further reduced, and C space pressure further increase. When the pressure is greater than the pressure of the gas, compressed gas exhaust valve, discharge gas in a row. The ground through the oil in the tank side by side in the atmosphere. During the continuous operation of the pump, continuous suction, compression and exhaust process, so as to realize the purpose of continuous pumping.

in the exhaust valve in the oil to prevent the air into the pump. Oil clearance on the pump body, oil hole and the exhaust valve into the pump chamber, make pump indoor surface for all activities that are covered by oil, to form a suction chamber, the exhaust chamber seal, oil filled with all harmful space at the same time, in order to eliminate the influence of extreme vacuum.

1。 Extreme pressure determines the type of the main pump

2. Choose work required by the process of production of pressure as the main pump.

3, vacuum chamber volume and the required time to choose the main pump pumping

4, the right combination of vacuum pump

5, according to the requirement of the vacuum cleaning, judge whether the oil type or no oil type

6. According to the characteristics of gas component selection vacuum pump

7. Choose the main pump according to economic indicators, such as the initial cost of investment and daily maintenance of the vacuum system.