Structure description

The rotary vane vacuum pump is a kind of positive displacement pump. It uses the rotary vane to continuously operate in the pump chamber to suck in and compress the gas, and finally discharge it from the exhaust port. The pump is mainly composed of stator, rotor, rotor, etc. The rotor is eccentrically installed into the stator cavity. There are two discs in the rotor slot, and the disc spring is placed between the two discs. The inlet and exhaust ports on the stator are separated into two parts by the rotor and the rotor.

When the rotor rotates in the stator cavity, its end slides close to the inner wall of the pump cavity under the combined action of spring tension and its own centrifugal force, and periodically expands the cavity volume at the inlet side to inhale gas, while gradually reducing the volume of the exhaust port, compressing the inhaled gas, and then discharging from the exhaust port to achieve the purpose of air extraction.

Features and scope of application

characteristic:

The suction port of the vacuum pump is equipped with a coarse filter with wire mesh. It can prevent solid foreign dust particles from being sucked into the pump cavity. The oil separator is equipped with an exhaust transition device with high efficiency oil and gas separation effect. When the pump is stopped, the suction valve built in the suction port isolates the pump from the pumped system to prevent oil from returning to the pumped system. The pump is cooled by air. All pumps of XD rotary vane vacuum pump are driven by direct-connected motor through elastic coupling.

Scope of application:

1. The vacuum pump is suitable for vacuuming the closed system. Such as vacuum packaging, vacuum forming, vacuum suction.

2. Inlet pressure range: 100Pa - 100000 Pa, oil mist will be generated at the exhaust port of the vacuum pump working beyond this range. The working ambient temperature and suction gas temperature of XD rotary vane vacuum pump should be between 5 ℃ and 40 ℃.

3. The vacuum pump cannot pump water or other liquids. Do not remove explosive, flammable, corrosive gas with high oxygen content.

4. Generally supplied motors are not explosion-proof. If explosion-proof or other special requirements are required, the motors must comply with relevant standards.

working principle

Most rotary vane vacuum pumps are small and medium-sized vacuum pumps. There are two types of rotary vane vacuum pumps: single-stage rotary vane vacuum pump and double-stage vacuum pump. The so-called two-stage rotary vane vacuum pump is to connect two single-stage pumps in series in structure. Generally, it is usually made into two-stage ones to obtain higher vacuum.

The relationship between pumping speed and inlet pressure of rotary vane vacuum pump is specified as follows: at the inlet pressure of 1333Pa, 1.33Pa and 1.33 × At 10-1 (Pa), the pumping speed shall not be lower than 95%, 50% and 20% of the nominal pumping speed of the pump.

Figure 2 is the working principle diagram of two-stage pump, which is composed of two single-stage pumps in series. During operation, the pumped gas first enters the high vacuum stage through the suction tube. When the suction gas pressure is high, part of the gas is discharged by the exhaust valve 2, and the other part is discharged by the exhaust valve 1 through the low vacuum stage. When the pressure of the inhaled gas is low, the exhaust valve 2 cannot be opened for exhaust even though it is compressed by the high vacuum level, and can only be compressed by the low vacuum level and discharged by the exhaust valve 1, because the limit vacuum of the two-stage pump is higher than that of the single-stage pump.

application

It is widely used in production and scientific research departments such as metallurgy, machinery, military industry, electronics, chemical industry, light industry, petroleum and medicine. It has been widely used in the vacuum packaging of food and plastic industry. Paper conveying, vacuum fixture, and vacuum suction in the printing industry.

Maintenance method

The oil level and oil contamination should be checked frequently (once a week is recommended). If the oil level is too low, stop the rotary vane vacuum pump and add appropriate vacuum pump oil to 4/5 of the oil window height. If the oil is polluted, the oil will become black, emulsified and thickened, and the oil should be changed in time.

Replace the vacuum pump oil and oil filter:

It is recommended to change the oil of the rotary vane vacuum pump after the first 150 hours of operation. Change the oil every 500 hours. At the same time of oil change, replace the oil filter. If the oil becomes black, emulsified or thickened due to pollution, the oil should be changed in time. Clean the pump before adding new oil.

Cleaning and oil change steps:

1. Stop the rotary vane vacuum pump and drain the hot oil.

2. Screw on the oil drain plug and run for 5-10 seconds.

3. Drain the oil.

4. Fill the cleaning oil to 3/4 of the oil window height.

5. Run the rotary vane vacuum pump for 5-10 minutes.

6. Stop the pump and drain the oil. If the oil cannot meet the requirements, repeat steps 4 and 5.

7. Screw on the oil drain plug and run 5-10 banknotes.

8. Drain the oil.

9. Fill the specified new rotary vane vacuum pump oil.

Yetuo 2XZ vacuum pump ----- click to go