Concentrate on quality of the construction hoist and suspended platform, never forget original intention!

How to repair gear and reducer of single beam bridge crane

by:Powerston     2021-04-14
It is troublesome to repair gears and reducers of single-girder bridge construction hoists, and all inspections can be completed only after shutting down. In many cases, it is not known that there is a problem without removing it. It is troublesome to repair gears and reducers of single-girder bridge construction hoists, and all inspections can be completed only after shutting down. In many cases, it is not known that there is a problem without removing it. (1) Disassemble the reducer to clean and check the gear grinding condition (2) Tooth surface inspection (3) Shaft inspection and repair (4) Bearing inspection and repair (5) Assembly inspection ① Center distance: Use a micrometer or a special vernier caliper to measure the center of the gear The distance ②tooth side tooth tip clearance can be measured by pressing the lead wire method ③the meshing area maintenance (6) Operation test (1) The gear wear on the first shaft of the reducer of the hoisting mechanism should not exceed 10% of the tooth thickness, and the rest It should be less than 20%; the gear wear on the first shaft of the reducer of the large and small car operating mechanism should not exceed 15%, and the rest should be less than 25%. (2) When the tooth surface pitting corrosion damages 30% of the meshing surface, and the depth reaches 10% of the original tooth thickness, the gear should be scrapped. There should be no cracks in the gear teeth or the gear should not have broken teeth. Otherwise replace. (3) There should be no cracks on the shaft, and the total length of the shaft curvature should not exceed 0.03mm/m. If it exceeds the standard, it will be straightened. (4) Allowable deviation of bearing radial clearance after overhaul (unit: mm) Allowable clearance of shaft diameter and inner diameter 17~30 0.02 35~50 0.03 55~90 0.04 (5) Check the following 3 items during assembly: center distance, tooth side clearance , Tolerance of meshing area (mm) ① Permissible deviation of center distance Center distance <100 100~200 250~400>500 Allowable deviation ±0.07 ±0.09 ±0.12±0.15 ②Allowable deviation of tooth side clearance The allowable value of tooth tip clearance is 0.25m, m-Module center distance 80~120 120~200 200~300 320~500 500~800 Tooth side clearance 0.13~0.26 0.17~0.34 0.21~0.4 026~0.53 0.34~0.67 Center distance 80~120 120~200 200~300 320~500 500~800 ③Use the method of applying red lead to check. The meshing area is not less than 45% of the tooth height, and 60% of the tooth width. The joint surface (split surface) of the gear of the single beam bridge crane and the reducer case shall not be smashed, touched or severely scratched at any part, and the edge is high. Points, flanging, etc., and the gap after the split surface is attached should not exceed 0.03mm, and no oil leakage should be guaranteed. Parallelism above 1m should not be greater than 0.5mm; under no-load conditions, the motor should be driven at 1000r/min, and the forward and reverse rotations should be no less than 10 minutes. When starting, the motor should not have vibration, impact, and violent or intermittent abnormal noise. ; The temperature rise in the box should not exceed 70℃, and the temperature should not exceed 80℃; the temperature rise of the bearing should not exceed 40℃, and its value should not exceed 80℃
Wuxi Powerston Technology Co.,Ltd is one of the world’s leading and most-trusted suppliers to the relevant markets.
If you are looking for a reputable suspended working platform construction hoist suppliers, you are on the lucky side as we are among the leading supplier in China. Visit the given links Powerston Construction Equipment to know more.
Wuxi Powerston Technology Co.,Ltd has developed its range of products around its own market research, which discovers customers' precise needs.
building material hoist suspended working platform is one of the most commonly used tool for construction hoist suppliers.
suspended working platform has a great positive reflects from our dear customers.
Custom message
Chat Online 编辑模式下无法使用
Chat Online inputting...