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Rotor high-speed rotating machinery be?

Hit:      Date:2012-02-10

In order to improve the efficiency of high-speed rotating machinery, tend to seal and bearing clearance adjusted too small to reduce gas and oil leaks. But the small gap will cause the excitation of the fluid power, but also the rotor and the stationary parts of the friction occurs. For example, the deflection of the shaft, rotor unbalance, rotor and stator thermal expansion is inconsistent, gas dynamic role, the role of the sealing force and vibration caused by the rotor of the bad reasons can lead to friction damage can cause serious injury accident.

 

The rotor and the stationary radial friction occurs there are two cases, one rotor eddy and stationary parts of the local or cyclical Rub. The rotor Jingsheng instantaneous asked contact the rotor stiffness increases; are still pieces of rebound after the disengagement of the rotor stiffness decreases, the wells and the occurrence of lateral free vibration.

 

Therefore, the rotor stiffness changes in the contact and non-contact between the rotary motion of the rotor lateral free vibration and forced vortex movement is added together to produce a unique, complex frequency of the vibration response. Continuous full week of contact friction occurs when the rotor and the stationary friction contact with the larger arc. A strong vibration when rotating machinery, the journal of a large area of dry friction in the bearing, a large friction, the rotor at the dry instability status.

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