Views:4 Author:Site Editor Publish Time: 2020-06-24 Origin:Site
The sliding contact surface of the articulated bearing is with an inner spherical surface and an outer spherical surface, and can be rotated and oscillated at any angle during movement. Spherical plain bearings have the characteristics of large load capacity, impact resistance, corrosion resistance, wear resistance, self-aligning, and good lubrication.
The allowable operating temperature of the spherical plain bearing bearing is mainly determined by the paired materials between the bearing sliding surfaces, especially the plastic material sliding surface of the self-lubricating spherical plain bearing bearing, and its bearing capacity will decrease at high temperatures. For example, when the material of the sliding surface of the lubricating spherical plain bearing is steel, its allowable operating temperature depends on the allowable operating temperature of the lubricant. However, for all lubricated and self-lubricating spherical plain bearings, they can be used in the temperature range of -30 ° C to + 80 ° C and maintain the correct bearing capacity.
The angle of inclination of a spherical bearing is much larger than that of a generally adjustable rolling bearing, and it is suitable for use in support parts with low concentricity requirements. The angle of inclination of an articulated bearing varies with the size and type of the bearing structure, the sealing device and the form of support. Generally, the inclination range of radial spherical plain bearings is 3 ° ~ 15 °, the inclination angle of angular contact spherical plain bearings is 2 ° ~ 3 °, and the inclination angle of thrust spherical plain bearings is 6 ° ~ 9 °.
In any case, the joint selected for the joint bearing must not cause uneven deformation of the ferrule, and the choice of its mating grade must be determined according to the working conditions such as bearing type, support type and load size.
4. Loading and Unloading
The loading and unloading of joint bearings should follow the principle that the force applied during assembly and disassembly cannot be directly transmitted through the spherical sliding surface. In addition, auxiliary loading and unloading tools, such as sleeves and disassemblers, should be used to directly and evenly apply the loading and unloading force applied by the outside world to the mating rings.
When assembling the spherical plain bearing series, it is necessary to keep the position of the split surface of the accidental ring in particular. In order to avoid the load acting directly on the split surface, it is necessary to maintain the split surface at right angles to the coincidence direction.
When the load and the speed of the swing motion are small, the oil-fed joint bearing can be operated without lubrication. However, in general, grease must be replenished regularly. During the initial installation and operation, it is recommended that the lubrication cycle be moderately shortened. Oil-free spherical plain bearings can be used without lubrication. However, if lithium soap-based grease is added before the operation, the service life of the joint bearing will be extended even more. If grease is injected into the space around the bearing, the joint bearing will be more effective in preventing the intrusion of dust and foreign matter.
There are many kinds of spherical plain bearings including radial spherical plain bearings, angular contact spherical plain bearings, thrust spherical plain bearings, rod ends spherical plain bearings and self-lubricating spherical plain bearings. Articulated bearings are widely used in engineering hydraulic oil cylinders, forging machine tools, construction machinery, automation equipment, automobile shock absorbers, hydraulic machinery and other industries. It is mainly consisted of inner and outer rings with a spherical sliding spherical contact surface. According to its structure and type, it can bear radial load, axial load, or combined load acting simultaneously in radial and axial directions.
Because the spherical sliding contact area of the spherical bearing is large and the inclination angle is large. At the same time, most spherical bearings adopt special processing methods, so it has a large load capacity and impact resistance, and has the characteristics of corrosion resistance, wear resistance, self-alignment, good lubrication, or self-lubrication without lubrication pollution, and can work normally even if the installation is misplaced. Therefore, spherical plain bearings are widely used for low-speed oscillating motion, tilting motion and rotary motion.
Hopefully this passage can help you learn more about the spherical plain bearings.