(1) Before the foundation bearing uneven subsidence, resulting in unit movement clearance center and change, so as to produce vibrations or destructive effect.
(2) Certain bearing support bearing support pad or insecure, the contact is not really, in the initial stages of plant operation in virtual contact state, after running through a period of time, resulting in changes in the unit of the original central location, so as to cause the occurrence of bearing vibration, etc. .
According to the actual situation of the unit, to develop treatment options are two: First, from the equipment base and the front bearing begin to re-adjust and calibrate the unit movement center, which is to solve the unit movement center offset and slide pin Jam fundamental initiatives. The second is to take measures from the associated bearing adjustment, to restore the original state of the central unit movement or blueprint to meet the requirements of indicators. Based on the second program site easy to adapt production urgently needed, it was approved to adopt. The unit center offset, mainly before bearing caused by uneven subsidence foundation, the center offset successive increases from front to back, the biggest part of the adjustment amount is No.4 (after the generator bearings) bearings.
Therefore, to ensure the No.1 bearing (front bearing) no adjustment of the existing state of the case, according to gas-electric coupling center design specifications and technical standards unit movement gap, respectively, No.2, No.3, No. 4 bearing the appropriate amount of the necessary adjustments, and to ensure that its adjusted indicators meet the specifications. The first overhaul of the unit, the first boot successful test, smoothly and power generation, heating, put into commercial operation. However, professional and technical personnel believe that the unit remains more critical state drawback that the central issue before the bearing base offset uneven subsidence caused not been radical, and the former bearing slide pin side appear / 00 gap, in real terms has occurred on friction or JAM, affect the device free expansion and the problem has not been properly addressed. It said repair method only meet the requirements of normal operation of the turbine generator at this stage, while the existing base unit uneven subsidence and slide pin Jamming important defect, if the development of future harm is bound to increase, the consequences will be severe.
Therefore, the proposed technical measures and overhaul work plan, be sure to take in the development of the unit measures to prevent foundation sinking, the former bearing leveling correction, according to technical indicators on both sides of the slide pin registration gap (the spool pin grooves cut if necessary , the reconstituted slide pin, according to the provisions of spotting a gap), to solve the gas, electricity center offset and slide pin Jamming problem fundamentally, it is one of the important measures to prevent vibration of the unit.
