Air-Cooled Roots Vacuum Pump

The Air-Cooled Roots vacuum pump adds a bypass gas cooling system to the ordinary roots vacuum pump. The external cooler enables the gas to automatically circulate and cool the rotor and pump body. The cooling gas enters the suction chamber of the pump from both sides of the pump body, so that the pump will not overheat due to compressed gas, so that it can operate reliably under high pressure difference and high compression ratio for a long time, but it has no impact on the pumping performance of the pump. The pump can be used alone or in series, or it can be connected in series with liquid ring vacuum pump and ordinary roots vacuum pump to form a unit to achieve a higher vacuum degree to meet various process requirements.

The structure of Air-Cooled Roots pump is shown in the figure. In the pump cavity, two rotors (two or three blades) are installed on a pair of parallel shafts, driven by a pair of synchronous reverse gears. There is a certain clearance between the rotors and between the rotor and the inner wall of the pump casing, which can realize high-speed operation. Compared with the ordinary roots vacuum pump, the Air-Cooled Roots vacuum pump is designed with a return port at a proper position on the side of the pump body to guide the cooled gas into the pump cavity to cool the rotor and keep the rotor temperature within the specified range. Therefore, the Air- Cooled Roots vacuum pump can withstand a higher differential pressure (up to 90kpa) without overheating

Characters:

1.Can discharge directly into the atmosphere without waste water discharge;

2.Connect in series with the fore pump to form roots unit, with remarkable energy-saving effect. Compared with ordinary roots pump, Air Cooled Roots vacuum pump can work with high pressure difference, so the fore pump can be appropriately reduced to achieve energy-saving effect.

3.Wide application range. Because the exhaust side can bear high pressure, it effectively solves the overload and overheating caused by the excessive pressure difference and the poor vacuum degree of the front pump of the ordinary roots vacuum pump;

4.Can work under higher inlet pressure. Air Cooled Roots vacuum pump can theoretically work under the condition of atmospheric pressure at the inlet;

5.Motor power is uncertain. Air Cooled Roots vacuum pump needs to calculate the maximum differential pressure during actual operation according to the process conditions to determine the required motor power.

6.Air Cooled Roots vacuum pump transmits torque through transmission. The dynamic seal of the main shaft transmits torque is static seal (i.e., no framework oil seal and mechanical seal), realizing zero leakage transmission of power.

7.Air Cooled Roots vacuum pump has no mechanical contact friction noise, can avoid high-frequency vibration, transmit power, and realize the smooth operation of Roots vacuum pump.

8.Air Cooled Roots vacuum pump can realize overload protection during the operation of working machinery.

9.Compared with the rigid coupling, Air Cooled Roots vacuum pump has no impact during startup, and is convenient for installation, disassembly, commissioning and maintenance.

10.Air Cooled Roots vacuum pump changes the dynamic seal of the rotating shaft to the static seal of the isolating sleeve, which can completely eliminate the old and difficult problems such as vacuum leakage and lubrication oil leakage caused by the wear of the dynamic seal of the shaft, and realize long-term sealing.

11.Air Cooled Roots vacuum pump does not need lubrication, and is free from medium and lubricant pollution to purify the environment.

12.The sealing performance of Air-Cooled Roots vacuum pump is independent of the rotating shaft speed.

13.The installation dimensions and performance parameters of Air-Cooled Roots pumps are the same as those of ordinary roots pumps.

Technical Performance Specifications

Note: The ultra-pressure listed in the table is the limit pressure value when the pump is used for direct discharge to the atmosphere alone. The ultra-pressure when the pump is equipped with a front stage pump is the same as that of common air-cooled series roots vacuum pump. Refer to the limit pressure value of the corresponding roots vacuum unit

Application

The pump and unit can reach various extreme vacuum and working pressure. The reasonable selection of pump and unit can refer to the above table and discuss with our factory in detail. In the following cases, Forced   Air Cooled pump and unit can be used.

① Particularly heavy load;

② Short pumping time;

③ Large pumping speed is required from coarse vacuum to high vacuum;

④ Occasion need avoid common pump working medium.

The pump and unit can be widely used in Vacuum Smelting, Vacuum Drying, Vacuum Impregnation, Vacuum Distillation, Vacuum Degassing, Aviation Simulation Test, Gas Transmission, Vacuum Suction, Power Station Dust Collection and other vacuum operations.

Roots Pump Dimensions