Repairing method for steam turbine oil pump flywheel shaft through laser cladding
A technology of laser cladding and repairing method, which is applied in the direction of metal material coating process, coating, etc., can solve the problem of high cost, achieve the effects of less energy consumption, good economic benefits, and reduce production costs
Inactive Publication Date: 2016-03-23
XINJIANG HUIXIANG LASER TECH
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Problems solved by technology
Replacement requires surveying and mapping, comparison, judgment, placing an order, and waiting for the arrival of the manufacturer's parts. The entire process requires a certain delivery cycle, so the cost of the entire process is relatively high
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment
[0019] The original condition of the workpiece
[0020] Through actual measurement, it is found that the speed regulating wheel shaft of the turbine oil pump has eccentricity, conical circle, misalignment, and other surface wear and tear marks.
[0021] Due to long-term high-speed operation, the wear of the large speed-regulating impeller is cone wear-3mm, the wear of the small impeller is cone-7mm, and the total deviation is 10MM. The cladding shaft diameter is repaired with the flywheel. The specifications and parameters of the shaft are provided by the entrusting party. The Rockwell hardness of the flywheel and shaft of the turbine oil pump is 28 by using a TH110 hardness tester.
[0022] S1. Perform shaft detection, obtain the size parameters of the shaft to be processed, and determine the worn part and its wear amount;
[0023] S2. Preparation of cladding repair powder:
[0024] S21. Weigh the following components by mass percentage: Fe: 12-24%; C: 1.5-3.5%; B: 0.2-2.4%...
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Abstract
The invention discloses a repairing method for a steam turbine oil pump flywheel shaft through laser cladding. The repairing method comprises the following steps that 1, the shaft is detected, cladding repairing powder is prepared, a laser is opened, the prepared cladding repairing powder is cladded on the abrasive position of the shaft, the power is 2200 kilowatts, the scanning speed is 600, and the cladding thickness is 2.2 MM; 2, the laser-cladded shaft is put in a heat preservation box, after being cooled slowly, the shaft is machined, a large turbine and a small turbine are machined, and the inner circle diameter of the large turbine and the inner circle diameter of the small turbine are corrected to be 70.3 MM and 70.2 MM respectively to enable the large turbine and the small turbine to be standard concentric circles; and 3, after machining is completed, detecting is conducted, the workpiece is free of bubble and deformation, and the requirements are met. According to the repairing method, the laser cladding is well applied to repairing the steam turbine oil pump flywheel shaft, the process is simple, the controllability is high, energy consumption is small, pollution to the environment is small, and the repaired flywheel shaft is free of cracks and pores; in addition, the service life is longer, good economic benefits are produced, and the production cost is reduced.
Description
technical field [0001] The invention relates to the field of laser cladding, in particular to a method for repairing a speed regulating wheel shaft of a steam turbine oil pump by laser cladding. Background technique [0002] During the use of the turbine oil pump governor shaft, due to the harsh working environment and long-term overload, the tooth surface of the gear shaft is worn and the meshing gap increases, resulting in shock vibration and noise beyond the normal allowable range during operation. With this type of wear on the shaft, it is common practice in the industry to purchase a new governor shaft of the same model and replace the worn governor shaft. However, the premise of this demand must be to disassemble the equipment to find the specific condition of wear, and judge whether it needs to be replaced after measurement. Replacement requires surveying and mapping, comparison, judgment, placing an order, and waiting for the arrival of the manufacturer's parts. The...
Claims
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IPC IPC(8): C23C24/10
CPCC23C24/106
Inventor 李文建
Owner XINJIANG HUIXIANG LASER TECH