Inspection methods for main mechanisms and parts o

Inspection method of main mechanism and parts of crane

inspection method of main mechanism and parts of crane 1. Brief description of Jinan assaying steel plate: the inspection of steel wire rope should focus on observing the broken wire, wear, kink, rust and other conditions, and mark some positions with serious wear and broken wire but not exceeding the standard, so as to focus on tracking and re inspection. Pay attention to check whether the safety limiter of the steel wire rope in the drum is effective, whether the steel wire rope pressing plate on the drum is compressed and whether the number of pressing plates is appropriate

1. Check whether the reducer leaks oil. If there is abnormal noise in the box during operation, open the box cover for inspection. Generally, it is caused by bearing damage or excessive gear meshing backlash, serious tooth surface wear and other reasons

2. Check the performance and condition of the brake. The brake is an important part of the crane, which directly affects the accuracy and reliability of the successful operation of each mechanism to upgrade the bolt tension and torsion testing machine to a microcomputer controlled experimental machine with controllable load proportion. Therefore, it is necessary to carefully check the condition of the brake of the lifting and luffing mechanisms, and observe the opening of the brake shoe and the wear of the friction element brake skin. For the belt brake, pay attention to check whether the steel backing of the brake belt has cracks, whether the transmission of the brake is flexible, whether the brake frame is intact and whether the elasticity of the main spring and auxiliary spring meet the requirements

3. Inspection of steel wire rope. The inspection of steel wire rope should focus on the observation of wire breakage, wear, kink, corrosion and other conditions. For some positions with serious wear and wire breakage but not exceeding the standard, marks should be made so as to focus on tracking and re inspection. Pay attention to check whether the safety limiter of the steel wire rope in the drum is effective, whether the steel wire rope pressing plate on the drum is compressed and whether the number of pressing plates is appropriate

4. 1. The mechanical property test of steel bar flash butt welding joint includes the inspection of tensile test and zigzag test pulley. The key points are whether the wear at the bottom of the groove exceeds the standard and whether the cast iron pulley exists. 10. The electromechanical cracks must be opened before the system is loaded. For the balance wheel of the pulley block of the luffing mechanism, it is easy to be ignored because it does not act under normal circumstances. Therefore, the flexibility of rotation must be checked before installation, otherwise, the length and tension of the left and right steel wire ropes can not be automatically adjusted through the balance wheel during installation, which increases the difficulty and danger of adjusting the rope at high altitude

5. Check each coupling for looseness or even rolling key. Check the elastic rubber ring of the elastic pin coupling for abnormal wear, and pay special attention to the wear condition of the gear ring of the toothed coupling. Due to poor installation accuracy, when there is a large offset between the two shafts, the whole ring gear will soon wear out in a short time. In case of such situation in the lifting mechanism, serious accidents are easy to occur