The wear of the mucking loader is mainly manifested in two aspects: the wear of the pick and the gear seat and the wear of the large-end deflector and the head body of the cutting head. Pick wear is mainly manifested as partial wear, and the main surface of tooth seat wear is tooth seat side wear and two wear (this situation is common); cutting head large end wear is mainly manifested as the large end surface is overall shiny and the thickness becomes thinner , And the size of the head body becomes smaller; the wear of the deflector is mainly manifested in the thinning of the plate thickness and sharp edges.
The main phenomena of the tooth seat deformation of the mucking loader are the fracture of the tooth seat and the deformation of the fitting surface of the tooth seat and the pick. The fracture surface of the broken tooth seat is generally located at the small fillet of the variable cross-section of the tooth seat. First, small cracks appear, which gradually expand and break during the use process; while the dents on the fitting surface of the tooth seat and the pick only appear On a cutting head body.
The tooth seat welded by the crushing head is a forged part, which is processed directly after forming without any heat treatment process, and has low mechanical properties, especially surface hardness. Since the cutting head is a direct rock-breaking mechanism of the slag raking machine, it is subject to greater impact, and the pick and the gear seat are in a clearance fit. Therefore, the joint surface of the pick and the gear seat is frequently subjected to impact force. Due to the hardness of the tooth seat surface Not enough to cause crushing. The fracture of part of the tooth seat is due to the excessive variable cross-section in the tooth seat design, and the small arc transition angle, which is caused by stress concentration during the working process.
The mucking loader can operate the machine after the hydraulic stain tank reaches the air pressure every time the machine is started. If the air pressure of the hydraulic oil tank is not enough, it will act as a machine, which will cause the sliding whip in the hydraulic pump to pull off, which will cause abnormal wear of the return plate and pressure plate in the pump body.
