Used in the process of the rotary vane vacuum pumps will appear what problem _

rotary vane vacuum pump is mainly composed of pump body, rotor, rotary blade, the end cover, a spring, etc. Rotor eccentricity to install in the rotary vane pump cavity, the inner surface of the outer periphery of the rotor and the pump chamber tangent ( There is little gap between) And the two rotor blade is installed in the rotor slot. When the rotor rotates, rotary vane can along its radial slot reciprocating motion and keep constant contact with the pump shell wall. Rotary vane with rotor rotation, vacuum pump chamber can be divided into several variable displacement. So what should be paid attention to in the operation of the rotary vane vacuum pump? We look together!

1。 Before using rotary vane vacuum pump, ensure clean and prevent debris into the pump. When the pump stop, check the oil level in the oil filling into the center of mimeograph. Exhaust valve is too low, cannot have the effect of seal oil, vacuum degree. At the start of the atmosphere, high fuel injection. Operation, oil level increases, this is normal. Using rules ranks of clean vacuum pump oil from the oil hole supply oil. Come on, should be screw on the screw. Shall contain a filtered oil to prevent debris, blocking oil hole, and according to the scale of mimeograph marked add oil to the vacuum pump oil. Rotating the 3-way valve (pos. No. , open to the air suction pipe of pump and fit containers insulation to open the outlet.

2。 When the environment temperature is too high, high oil temperature, viscosity, saturated vapor pressure increases, this will lead to ultimate vacuum is reduced, especially the thermocouple measuring instrument measured total pressure.

3。 Shall not use vacuum pump to remove oxygen, explosive and corrosive gas metal. In addition, it is not recommended inhaled and pump oil and gas reaction gas contains a lot of water vapor.

4。 Rotary vane vacuum pump can be started in the atmosphere or any vacuum once a year. If the pump port connected to the solenoid valve, should with the pump running at the same time.

5。 After the normal operation of pump, slowly rotating three-way valve, make the pump suction pipe connected to the vacuum container, and from the atmosphere.

6。 Turn the pulley by hand check operation. Without exception, turn it on again and pay attention to the direction of rotation.

7。 Use after a period of time, the belt is flabby, adjust the motor position. Pay attention to the oil pump, found that when the oil pump and debris or water mix, change new oil, clean the pump body, do not use acetic acid ethyl ester, acetone and other volatile liquid pump body cleaning.

8。 Check the large rotary blade limiting vacuum of vacuum pump. Will be subject to compression mercury vacuum gauge. If fully calculated preliminary extraction effect, the temperature of the pump will remain stable, pump port and instrument will be connected directly, and achieve ultimate vacuum in run 30 minutes.

9。 If the relative humidity is higher, or pumping the gas contained more condensable vapor, open the pump after container, should open the gas ballast valve, and running close the gas ballast valve from 20 to 40 minutes. Before stop the pump, can open air valve for 30 minutes, in order to prolong the service life of oil pump.

10。 When stop rotary vane vacuum pump, if you want to keep the vacuum system has a certain degree of vacuum, turn three way valve should be closed vacuum system, and the pump suction pipe is connected to the atmosphere. Shut off the power and stop the operation. Close vent and cover pump cover.