CN-117267033-B - Method for adjusting thrust bearing force of rigid strut type hydroelectric generating set

CN117267033BCN 117267033 BCN117267033 BCN 117267033BCN-117267033-B

Abstract

The invention relates to a method for adjusting the thrust bearing force of a rigid prop type hydroelectric generating set, which is characterized in that the height of a heavy-duty bolt is monitored by a dial instead of a dial gauge, the rotation angle of the heavy-duty bolt is monitored by conversion, the height of the heavy-duty bolt is adjusted by installing a pointer at the end part of the heavy-duty bolt which needs to be subjected to force adjustment, a dial gauge is arranged on a bearing frame, and the heavy-duty bolt is rotated by a certain angle according to a target value, so that the condition of inaccurate adjustment caused by inaccurate reading of the dial gauge due to vibration is avoided, the working efficiency is greatly improved, the overhaul process is optimized, and the overhaul period is saved.

Inventors

WEN LEI
WANG JINHAO
Yao Sinan
ZHOU TIANHUA
YANG DONG
CAI CHAODONG
LUO ZHIMING
WANG JIFENG
LIU JINQUAN
YANG RUIBO

Assignees

华能澜沧江水电股份有限公司

Dates

Publication Date: 20260508
Application Date: 20230915

Claims (5)

1. A method for adjusting thrust bearing force of a rigid prop type hydroelectric generating set is characterized by comprising the following steps: the method comprises the following steps of (1) jacking a rotating part of the whole unit by using a rotor jacking oil pump, transferring the weight of the unit to a brake, and throwing the brake to lock an ingot; Step (2) measuring a thrust tile stress value of the unit when the rotor is jacked up, and recording; step (3), the brake lock spindle is withdrawn, a top rotor oil pump is operated, and the weight of the rotating part of the unit is transferred to a thrust bearing; step (4) measuring the thrust tile stress value of the unit when the rotor falls down, and recording; step (5) subtracting the thrust tile stress value when the rotor is jacked from the thrust tile stress value when the rotor is dropped to obtain the stress value of each thrust tile; step (6), a thrust tile which needs to be subjected to stress adjustment can be obtained according to the data, and an adjustment value is determined according to experience; Step (7), the thrust tile anti-heavy bolt locking plate which needs to be adjusted to be stressed is detached; step (8), the dial is arranged on the bearing rack, and the pointer is arranged at the end part of the anti-weight bolt; step (9) calculating an angle to be adjusted according to the height to be adjusted, wherein the calculation method comprises the following steps: ; Wherein, the pitch of the P-heavy bolt, the angle A-to be adjusted, the height sigma-to be adjusted, the pitch of the heavy bolt and the height to be adjusted are the known values; step (10), enabling the heavy-duty bolt to rotate according to the direction of the expected adjustment value, observing the angle indicated by the pointer on the dial, and stopping after reaching the calculated value; Step (11) removing the pointer and the dial, and reinstalling the lock plate at the end part of the heavy-duty bolt; and (12) measuring stress data of each thrust tile after the rotor falls down, and subtracting the stress data of the thrust tile when the rotor is jacked up, wherein the stress data is the thrust tile stress value after one-time adjustment.
2. The method of claim 1, wherein step (6) further comprises repeating step (1) again to jack up the rotor to transfer the weight of the rotating portion to the brake.
3. The method according to claim 1, wherein in the step (10), the plum blossom knocking spanner is sleeved on the end part of the heavy bolt, the spanner is lightly knocked by using a small hammer, the heavy bolt is rotated according to the direction of the expected adjustment value, the angle indicated by the pointer on the dial is observed, and the knocking is stopped after the calculated value is reached.
4. The method according to claim 1, further comprising, after the step (11) And (3) repeating the step (3) to withdraw from the brake lock spindle, releasing the pressure of the brake, and transferring the weight of the rotating part of the unit to the thrust bearing.
5. The method of claim 1, wherein the step (12) is followed by repeating the above steps until the force is acceptable if the adjustment is not acceptable.

Description

Method for adjusting thrust bearing force of rigid strut type hydroelectric generating set Technical Field The invention belongs to the field of installation and maintenance of hydroelectric generating sets, and particularly relates to a method for adjusting thrust bearing force of a rigid support type hydroelectric generating set. Background The thrust stress adjustment work of the hydroelectric generating set is very important work in the installation and maintenance of the set. The thrust bearing bears the weight of the unit rotating part and the axial water thrust when the unit operates, if the unit thrust bearing is uneven, the eccentric wear of the thrust bearing can be caused, the thrust bearing Wen Piancha is large, even the vibration swing degree of the unit is increased, destructive accidents such as the burning of the thrust bearing are caused, and the safe and stable operation of the unit is influenced. According to the existing means, when the rigid strut type thrust bearing is adjusted to bear force, a dial indicator is erected at the end part of the heavy bolt, then the adjustment of the height of the heavy bolt is carried out by a small hammer knocking method, the adjustment height of the heavy bolt is measured by the reading of the dial indicator, when the small hammer is used for knocking the heavy bolt, the dial indicator can generate inaccurate reading due to vibration generated by knocking, so that the adjustment data is inaccurate, overshoot or undershoot often occurs, the expected effect can be achieved by carrying out multiple times of adjustment, and the working efficiency is low. Disclosure of Invention Aiming at the defects in the prior art, the invention provides a method for adjusting the thrust bearing force of a rigid support type hydroelectric generating set, which adjusts the thrust bearing force of the rigid support type hydroelectric generating set through measuring angles by a dial. The invention is realized by the following technical scheme: a method for adjusting thrust bearing force of a rigid prop type hydroelectric generating set comprises the following steps: the method comprises the following steps of (1) jacking a rotating part of the whole unit by using a rotor jacking oil pump, transferring the weight of the unit to a brake, and throwing the brake to lock an ingot; Step (3) withdraw from the brake lock spindle, operate and push the rotor oil pump, transfer the unit to thrust bearing to rotate the partial weight; step (4) measuring and recording the thrust tile stress value of the unit when the rotor falls, and step (5) subtracting the thrust tile stress value when the rotor is jacked from the thrust tile stress value when the rotor falls to obtain the stress value of each thrust tile; step (6), a thrust tile which needs to be subjected to stress adjustment can be obtained according to the data, and an adjustment value is determined according to experience; Step (7), the thrust tile anti-heavy bolt locking plate which needs to be adjusted to be stressed is detached; the step (8) is to install the dial on the bearing frame and install the pointer on the end of the anti-heavy bolt, the step (9) is to calculate the angle to be adjusted according to the height to be adjusted, the calculation method is as follows: the tooth distance of the P-heavy bolt, the angle A-to be adjusted, the height sigma-to be adjusted, the tooth distance of the heavy bolt and the height to be adjusted are known; step (10), enabling the heavy-duty bolt to rotate according to the direction of the expected adjustment value, observing the angle indicated by the pointer on the dial, and stopping after reaching the calculated value; Step (11) removing the pointer and the dial, and reinstalling the lock plate at the end part of the heavy-duty bolt; and (12) measuring stress data of each thrust tile after the rotor falls down, and subtracting the stress data of the thrust tile when the rotor is jacked up, wherein the stress data is the thrust tile stress value after one-time adjustment. Further, the step (6) further comprises repeating the step (1) again, and jacking up the rotor to transfer the weight of the rotating part to the brake. In the step (10), a quincuncial knocking spanner is sleeved at the end part of the heavy bolt, a small hammer is used for lightly knocking the spanner, the heavy bolt is enabled to rotate in the direction of an expected adjusting value, the angle indicated by the pointer on the dial is observed, and knocking is stopped after the calculated value is reached. And (3) after the step (11), the step (3) is repeated to withdraw the brake from the brake lock ingot, the brake is decompressed, and the weight of the rotating part of the unit is transferred to the thrust bearing. Further, the step (12) further comprises repeating the above steps if the primary adjustment is not qualified until the stress is qualified. Compared with the prior art, the invention has the followin