What is a composite bearings, composite bearings and rolling and the difference between the needle roller bearing

A, what is a composite bearing? By different components ( Metal, plastic, solid lubricating materials) Synthesis of bearing called composite bearing, compound bearing itself is sliding bearing, compound bearing is also called bush, bearing or sleeve bearing, usually cylindrical, contains no moving parts. Standard configuration includes cylindrical bearings, for radial load to radial and light of flanging bearing axial load, used for heavy axial load gasket and rummaged through gaskets and various kinds of sliding plate shape. Can also custom design, including special shapes, features ( Oil groove, hole, concave, convex pieces, etc. ) And size. Composite bearing for sliding, rotation, swing or reciprocating motion. Sliding applications are usually used for sliding bearing, bearing pad and wear-resistant plate. Sliding surface is usually flat, but also can be cylindrical, and always linear motion, not rotary motion. Rotating applications involving the cylinder and one or two direction. Swing and reciprocating motion applications involving plane or a cylinder, a two-way. Composite bearing structure can be solid, also can be convenient to install the separation of docking, Rolling bearing) 。 Bearing and application of matching is very important. High load bearing increase the contact area and has high load bearing capacity. Relative to the lubricating oil, grease lubrication bearing, the design of solid lubricants bearings can run at higher temperatures. High temperature applications require special lubrication measures are taken to reduce quantity of heat accumulation and friction to the greatest extent. Composite bearings are made of different structure. The choice of product depends on the condition and performance requirements. Second, low friction bearing material type metal composite bearing by metal backing ( Usually steel or copper backing) , on which the sintered porous copper interlayer, impregnated ptfe and additives, in order to obtain a high resistance to friction and wear bearing performance of running surface. This kind of bearing can run dry or external lubrication conditions. Can also be made from engineering plastic composite bearings, has excellent wear resistance and low friction performance, is widely used in dry friction and lubrication conditions. Injection molding, can be designed into almost any shape, and by strengthening various resin made from cellulose and solid lubricant. The bearing has excellent dimensional stability, low friction coefficient and good thermal conductivity. Fiber enhanced composite bearing is another form of composite bearing, filament winding, fiber glass impregnation, epoxy abrasion resistant low friction bearing liner and various backings. This structure enables the bearings to withstand high static and dynamic load, and the inertia of material itself, make product is suitable for the corrosive environment ideal choice. Single metal, double metal and sintered copper composite bearing is designed for industrial application products, land and water under high load slow movement speed. Lubricant impregnated solid copper bearing can provide free maintenance under the application of high temperature performance, and sheet metal and bimetallic bearing lubrication is designed for the application. Three, the difference between the composite bearing and rolling and needle bearing significant differences between composite bearing and rolling bearing, so can not be used interchangeably. More than 1, the rolling bearing, due to its complex parts design, precision structure and precise installation, often than composite bearing a much higher price. 2, rolling bearing is more suitable for requires precise shaft position and/or the application of extremely low friction. 3, composite bearing, due to its larger contact area and adaptability, can provide higher load capacity and high impact load and concentrated load end of tolerance. 4, composite bearing is better than part of the rolling bearing to make up the dislocation, in order to reduce the impact of the end concentrated load. 5, composite bearing adopts the ultrathin sheet design, can reduce the shell size, largely save space and weight loss. 6, composite bearing of reciprocating motion more tolerance and can extend the life of the bearing. 7, composite bearings under high speed and low load operation will not be brought about by the sliding wear roller damage, and excellent damping performance. 8, composite bearing compared with rolling bearings, internal contains no moving parts, thus more quiet, and rotational speed in the appropriate lubrication system of an almost unlimited. 9, composite bearing installation is simple, only need machine shell, compared with the rolling bearing barely damaged parts. 10, non-metallic composite bearing compared with standard rolling bearing, has better corrosion resistance. 11, composite bearings can run dry without extra lubricant system, lubricants and maintenance equipment downtime costs. 12, composite bearing can exist in high temperature and dry run of pollutants circumstances.