Coupling plane to the upper part of the scoop to the upper part

During the inspection and repair, it was found that the coupling's jerk exceeds the standard and through balancing, it can balance the center's unbalanced quality. If the rigid coupling scoop exceeds the standard, when the bolts are tightened, it will cause the other side's spigot to fluctuate.*** * Vibration occurs during operation.

On-site treatment of scoop bias method, the use of standard flat scrape. Another method is to use non-uniform heating to cause the part to expand to correct the scooping effect. The specific method is to rotate the coupling to the upper part of the plane scoop, and then at the maximum value of the positive point, the other end of the coupling, that is, the circle near the root of the coupling is heated along the arc with a baking handle . The end of the coupling at the negative value is heated in a zigzag pattern. At the same time heating. The coupling expands and uses its weight or hanging weight to correct the deviation. In the heating process, a dial indicator can be used to monitor the change.

The coupling is used to connect the turbine rotor and the generator rotor with the main oil pump lubrication system and adjustment system, mainly transmitting the torque. As the coupling rotates with the turbine rotor at high speed, it receives a large centrifugal force. One end of the original spring-type flexible coupling is fixed by two bolts of the flange, and is sandwiched between the flange of the turbine rotor and the flange of the coupling, or between the oil pump main shaft, and has a certain displacement in the axial direction. In operation, there is some deviation between the center of the turbine rotor and the center of the coupling. In addition, slight unevenness of the expansion of the main shaft or other reasons may cause a large shearing force of the spring plate, and the spring piece is subject to the twisting stress. So it's easy to break.

After the spring breaks, the axial clearance is more uneven, and the deviation of the left and right openings is larger. After reaching a certain degree of design theory, the flange of the coupling side is covered with friction for a short time and the time is longer, which will cause the coupling. The bolts break and then break. After being changed to a toothed sleeve type, it mainly has the following advantages: Larger center deviation can be allowed when the rotor expands; it can smoothly transmit a large rotational torque of the turbine generator; the shaft displacement can be well absorbed when the main shaft expands; each rod tooth Evenly, the force between the teeth and the teeth is even, reducing the vibration in the transmission