SANY paver LTU90SC paver supporting wheel quality is reliable along with the diversification of highway grades in China, grade highway, county and township highway and urban road are unprecedented scale, standards and speed forward. At the same time, the speed of pavement construction is also increasing rapidly, which not only promotes the mechanization of highway construction, but also puts forward higher and higher requirements for the technical level of construction machinery, construction technology, pavement material and pavement structure design. The technical level and construction technology of construction machinery have an important impact on highway grade and construction speed. The condition-based maintenance based on reliability is to scientifically determine the maintenance project, optimize the maintenance mode, determine the reasonable maintenance cycle and only do the necessary maintenance work through the analysis of the reliability factors of the equipment itself, so as to restore the reliability accuracy of the paver and save the maintenance time and cost.
Question: What material is the supporting wheel body of Sany paver LTU90SC paver cast?
Answer: The material of supporting wheel body is generally 50Mn, 40Mn2, and other materials. The main process is casting or forging, mechanical processing, and then heat treatment. The hardness of the wheel surface after quenching should reach HRC 45-52, in order to increase the wear resistance of the wheel surface. The processing accuracy of the supporting wheel axle is required to be high. Generally, NC machine tools are needed to process the axle to meet the requirements. There are more 40Mn2 materials, and quenching and heat treatment should be carried out after processing. The hardness is about HRC42.
Question: What are the shortcomings of domestic heavy wheel products?
Answer: 1. Many steel labels are not up to the standard, and the heat treatment process has not been well developed.
2. In the vicious competition in the market, jerry-building happens in several important structures of products, such as the reduction of wheel diameter, the thinning of brackets, the shortening of copper sleeve length, etc.
The reduction of the diameter of the wheel becomes the acceleration of the linear speed of the wheel, and the more friction the Bush bears. The same is true for the thinning of the supporting axle. The impact force will not be enough to deform or break the axle. Copper sleeve plays a frictional role. Copper layer is not easy to fall off after rolling. Normal copper layer is more than 0.35 mm before reaching the standard. The significance of reducing the length of copper sleeve supporting wheel is lost. Reducing the length is equivalent to reducing the area under stress.
Question: What are the problems and causes of heavy wheels?
Answer: 1. Wheel wear: The reason for this situation is that the steel used is not qualified or the hardness of the material is low during heat treatment, and the wear resistance is insufficient.
2. Oil Leakage: The bearing axle rotates through the Bush all the time, and the inner part of the wheel needs oil to lubricate. But if the sealing ring is not good, it is easy to cause oil leak. In this case, the axle and bush are easy to wear and tear without lubrication, resulting in the product can not be used.
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