Factors affecting the performance of roots vacuum pump
Roots vacuum pump, it is a positive displacement pump, also known as mechanical booster pump, is currently available in one of the main extraction equipment, high vacuum, its working principle are similar to those of roots blower, are using 8 synchronous rotor in the pump shell do turn in the opposite direction, so as to complete the suction and exhaust. Roots pump cannot be used alone, can only use series pump before, choice of screw pump, oil pump, liquid ring pump as the backing pump, it is worth mentioning, was elected with screw pump, liquid ring pump as the backing pump, especially suitable for pumping large amounts of suspicious gas.
Roots vacuum pump maintenance is simple, operation is convenient, the problem is less, so when the application is relatively more beneficial, in order to deepen everyone's understanding, below, small make up take you to understand the factors affecting the performance of roots vacuum pump.
Factors influencing the performance of roots vacuum pump:
1. The important part of roots vacuum pump is the rotor, while the profile is the decisive factor of the rotor, and the outer surface line of the cross section of the rotor is the profile of the rotor.
2. In order to control roentgen vacuum pump rotor and the clearance between rotor and pump shell, the axial and radial displacement of bearing should be controlled within certain scope. When planning, the bearing precision should be selected accurately and the bearing type should be selected according to the precondition of the pump. Due to the influence of axial thermal contraction of the rotor, the rotor shaft should have a movable end to allow axial displacement due to thermal shrinkage and other factors.
3. It is required that the gear has strong abrasion resistance, stable transmission and not too large clearance between teeth. Gear accuracy is usually 5 to 6 grades. In order to make the transmission of roots vacuum pump stable, low tone, commonly used bevel gear. In order to make the gap between gear device and rotor easy to adjust, we can choose to adjust the gap to construct the gear and adopt the method of box expansion joint between gear and shaft.