Bulldozer accessories guide wheel damage cause, China bulldozer guide wheel factory

Bulldozer accessories guide wheel damage cause, China bulldozer guide wheel factory

Bulldozers dig soil, coal, silt, pre-loosened soil and rocks and other materials through buckets, and then load the materials into transport vehicles or unload them to stockyards. Nowadays, bulldozers are one of the main construction machinery in engineering construction. Bulldozer guide wheel is installed on the crawler belt to guide the crawler belt to rotate correctly, and the bulldozer guide wheel assembly can prevent its deviation and deviation. Improper use can also lead to the damage of the guide wheel. Brother Dig is here to ask how much you know about the causes of the damage of the guide wheel.China Bulldozer Idler Factory

Operating principle of bulldozer idler:
Use a grease gun to inject grease into the grease cylinder through the grease nozzle, so that the piston extends outward to push the tension spring, so that the guide wheel moves to the left to tighten the track, and the tension spring has a proper stroke. When the tension force is too large, the spring is compressed to play a buffer role; After the excessive tension disappears, the compressed spring pushes the guide wheel to the original position, which can ensure that the track frame slides along to change the track width, ensure the disassembly and assembly of the track, reduce the impact during the traveling process, and avoid the derailment of the track chain.China Bulldozer Idler Factory

Causes of bulldozer guide wheel damage:
1. The coaxiality of the guide wheel bimetal sleeve sliding bearing is not out of tolerance, which causes vibration jump and impact when the crawler walks. Once the geometric dimension is out of tolerance, the clearance between the guide wheel shaft and the shaft sleeve is too small or no clearance, and the thickness of lubricating oil film is not enough or even no lubricating oil film.China Bulldozer Idler Factory
2. The surface roughness of the guide axle is out of tolerance. There are many metal ridges on the surface of the shaft, which destroy the integrity and continuity of the lubricating oil film between the shaft and the sliding bearing. When working, a large amount of metal debris will be produced in the lubricating oil, which will increase the surface roughness of the shaft and bearing, worsen the lubrication state, and cause serious wear of the guide wheel shaft and sliding bearing.China Bulldozer Idler Factory
3. The original structure has defects. The lubricating oil is injected from the plug hole at the end of the guide wheel shaft, and then gradually fills the whole cavity. In actual operation, if there is no special tool for oil injection, it is difficult for the lubricating oil to pass through the circuitous cavity in the guide wheel only under the action of its own gravity, and the gas in the cavity is not discharged smoothly, so it is difficult for the lubricating oil to be filled. The oil filling space of the original machine cavity is too small, resulting in a serious shortage of lubricating oil.

4. The lubricating oil in the clearance between the idler shaft and the shaft sleeve cannot take away the heat generated by the bearing operation because there is no oil passage, which causes the working temperature of the bearing to increase, the viscosity of the lubricating oil to decrease, and the thickness of the lubricating oil film to decrease.