Selection and Characteristics of the composite plain bearings

Machinery and equipment in order to deal with high-temperature, low-speed, heavy-duty, large dust, water, shower and punching composite bearings have hit oscillation smooth doubt, use the composite plain bearings.
  1, structural composite sliding bearings are in conflict bearing surface of the metal substrate is placed in an orderly development of the appropriate size hole, and embedded molybdenum disulfide and graphite composites made from smooth slider inlaid metal sleeve, made of composite bearings, smooth solid area of ​​25-65% friction agent. Since smooth solid block normal operation at a high temperature of 280 ℃. But because of its low mechanical strength, carrying capacity is weak, prone to distortion, it embedded in the metal tank hole plain bearings will be able to restrain this defect, forming a metal part from the supporting effect, since the block from smooth glossy effect. Such smooth composite sliding bearing mechanism is in conflict shaft and sliding sleeve in the process, since part of the smooth transfer of data elements to the metal surface of the shaft, filling the small, uneven surface and form a smooth layer of relatively stable solid film , the formation of ground between the solid and smooth film to prevent adhesion of the shaft and sleeve wear. This is a reasonable combination of sexual contact copper alloys and non-metallic materials by grinding their complementary advantages, especially for oil-free, high temperature, high load, low speed, anti-fouling, corrosion, strong radiation in the environment movement amplitude, and use in water or other solutions can not be applied moist and smooth base oil special working conditions.
  2, since the smooth block area accounted for more than a block from the smooth surface area accounted for much of the work speed, bearing strength related to low speed; large bearing strength, the area occupied by the metal should be larger. The grab ingot Trolley line axle Cheng Ziguang slider occupied area of ​​25% or so, pull the starter mechanism to smooth shaft bearing abundant little bearing strength, smooth block from the area occupied by 65% ​​or so.
  3, bush skills requested information should be used in an alloy of copper liner, the liner have a high hardness, normally required heat treatment, the hardness is not less than HRC45.
  4, since the smooth shape and inlaid dash block request. Smooth shape from cylindrical and rectangular blocks have two, since the size of the area occupied by smooth basis can be cylindrical, rectangular and vice versa can be. No matter what shape it is necessary to insert strong to prevent falling during operation.
  5, with the value of the gap with the shaft bushing linear expansion coefficient from smooth blocks about 10 times stronger than steel. To meet the bearing temperature, shaft and bushing voids formed by four pieces of metal have been moving with (D4 / DC4) 0.032 ~ 0.15MM, increased to 0.45 ~ 0.5MM. Since the smooth side of the conflict in the sub-block metal liner Outstanding 0.2 ~ 0.4MM. This will get together in the initial grinding work of bearing abundant smooth drag power cut power consumption.