Bridge crane normal operation, gnawing rail hazards

Crane normal operation, the wheel rim and the orbit must maintain a certain gap between the design maximum gap of 30-40mm, but in exceptional circumstances, the wheel is not in the middle of running its tread,hoist gantry crane rim and squeezing each side of the track friction gnawing rail failure occurred, affecting the safe operation of the crane.
First, the dangers of eating track
1. Reducing the service life of the wheel and rail. Intermediate bridge crane in the type of work under normal use, the wheels can be used for 10 years or longer, but the gnawing serious rail bridge crane, wheel life difficult than one year, or even only a few months, resulting in frequent replacement wheels. Side of the track rail friction also reduces the service life, serious, track access is only 3-5 years scrapped.

2. Increase the running resistance. According to the determination, serious gnawing rail bridge gantry crane  running resistance is the resistance of 1.5-3.5 times normal operation, causing the motor and drive mechanism to increase the load even overloaded, the motor can be severe burning or transmission failure. Bridge crane with the risk of derailment. Overhead crane rails serious bite, the wheel rim is compressional deformation, may climb the top of the track causing derailment.

3. Negative impact on the building structure. Easy to produce horizontal rail crane gnawing lateral force, causing lateral displacement of the track, the track bolts loose. In addition,sino hoist the lateral force transmitted to the plant through the roof rail, seriously affecting the bridge and plant stress conditions so trusses Itabashi partial loosening or breakage.