HMB

Why your excavator guide wheel is often damaged? This a few points you should pay attention to!

by:HMB     2021-01-26
1, guide wheel is double metal sleeve bearing is not out-of-tolerance coaxial degree, crawler walking a vibration and impact, once the geometry size out-of-tolerance, makes the guide wheel shaft and shaft sleeve clearance is too small or no clearance, there is no lubricating oil in the lubricating oil film thickness is not enough even film. 2, is guide shaft surface roughness. Shaft surface, there are many metal edge peak, destroy the integrity of the lubricating oil film between the shaft and the sliding bearing and continuity. Work, the lubricating oil will produce a lot of metal abrasive dust, shaft and the bearing surface roughness increases, the lubrication condition became worse, guide wheel shaft and bearing severe wear. 3, is the defect of the original structure. Lubricating oil from the guide shaft end plug hole injection, and then gradually fills the cavity, in practice, if there is no oil special tools, lubricating oil only under the action of its own gravity, it is hard to through the cavity within the guide wheel circuitous, poor and cavity gas discharge, lubricating oil is hard to fill. The original machine cavity oil filled the space is too small, resulting in a serious shortage of lubricating oil quantity. 4, is the lubrication oil in the guide shaft and shaft sleeve clearance because they had no oil duct and the heat generated by the bearing work can not be taken away, and the bearing of the working temperature, lubricant viscosity decreased, the thickness of lube film decreases. Crawler crane guide wheel works: the working principle of crawler crane guide wheel as follows, to pass through the yellow butter with butter gun nozzle into the butter in cylinder, the piston overhanging push up tight spring, make the guide wheel shift to the left to get a tight track, top tight spring with appropriate schedule, when when tight force is too large plays a role of buffer spring is compressed. Too much when tight force disappears, the compressed spring will guide wheel to the in situ, so that to change the wheel base, slip along the crawler frame ensure caterpillar tear open outfit, minimize the impact of the walking process, avoid rail chain derailment. Crawler crane guide wheel damage reasons are as follows: the reason mainly has the following several aspects: 1, guide wheel, double metal sleeve bearing no out-of-tolerance coaxial degree, crawler walking a vibration and impact, once the geometry size out-of-tolerance, makes the guide wheel shaft and shaft sleeve clearance is too small or no gap and the thickness of lube film is not enough even no lubricating oil film. 2, is guide shaft surface roughness. Shaft surface, there are many metal edge peak, destroy the integrity of the lubricating oil film between the shaft and the sliding bearing and continuity. Work, the lubricating oil will produce a lot of metal abrasive dust, shaft and the bearing surface roughness increases, the lubrication condition became worse, guide wheel shaft and bearing severe wear. 3, is the defect of the original structure. Lubricating oil from the guide shaft end plug hole injection, and then gradually fills the cavity, in practice, if there is no oil special tools, lubricating oil only under the action of its own gravity, it is hard to through the cavity within the guide wheel circuitous, poor and cavity gas discharge, lubricating oil is hard to fill. The original machine cavity oil filled the space is too small, resulting in a serious shortage of lubricating oil quantity. 4, is the lubrication oil in the guide shaft and shaft sleeve clearance because they had no oil duct and the heat generated by the bearing work can not be taken away, and the bearing of the working temperature, lubricant viscosity decreased, the thickness of lube film decreases. Replace crawler crane guide wheel method: 1, the first crawler crane on the tracks down. The grease fitting that place of a single valve down, put butter in, of the guide wheel with bucket intelligent machinery group suggestion to push, to track the loose the better, remember to open individual valve, or track down the bad, worse. 2, installation guide wheel. Guide wheel with general wheel installation method is the same. Jacked the crawler crane up, then use a screwdriver unscrewed the screw and removed after the new wheels, wipe on lubricating oil, installation is completed.
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