Maintenance of turbine on the coupling of the ladle side and runout measurement is an important work. Inspection found coupling runout exceed the standard, by dynamic balance, mass balance center can cause imbalances; if the rigid coupling ladle side exceed the standard, when the bolt fastening, will cause the other side of the shaft neck and degree increased, vibration occurs in the running state.
The processing method of ladle side, using standard plate scraping. Another method is to use the uneven heating components due to expansion and play the role of scoop partial correction.
Specific approach is the coupling plane scoop partial negative place to shoot, and then on the other end surface at the maximum positive coupling, the coupling near the roots of round surfaces with a roast along the arc heating. In the end of the coupling to "negative" font fire heating. At the same time heating. The coupling expansion, by its weight or weight suspended, rectify the deviation, in the process of heating, can install dial indicator monitoring changes.
Coupling is used for connecting a turbine rotor and generator rotor and the regulation of the main oil pump oil lubrication system, system, the main transmission torque. Because the coupling with the turbine rotor high-speed rotation, so by the large centrifugal force. The original spring type flexible coupling is fixed by the flange two bolt, sandwiched between the rotor flange and the coupling flange, or between the pump shaft, the axial displacement of certain. In the operation of steam turbine rotor center and a center have some deviations, in addition the spindle expanded slightly uneven or other reasons, may be caused by shear force of the spring sheet greatly, because the spring by the ground stress, so easy to fracture. The spring fracture after the axial clearance is not uniform, left and right opening deviation, after reaching a certain degree of design theory, tile friction coupling side flange short time, for a long time, can make the coupling bolt fracture, then wring. To gear sleeve type, mainly has the following advantages: rotor expansion allows the center of large deviation; can be smoothly transmitted torque large turbine generator; spindle can well absorb the axial displacement expansion; the rodent in uniform, between tooth and tooth stress evenly, reducing vibration drive in.