Performance and application of joint bearing!

Performance and application of joint bearing!

Firstly, joint bearings are widely used in engineering hydraulic cylinders, forging machine tools, engineering machinery, automation equipment, automotive shock absorbers, hydraulic machinery and other industries. Spherical plain bearing is a spherical plain bearing. Its basic type is composed of inner and outer rings with spherical contact surface. According to its structure and type, it can bear the radial load, the axial load, or the combined load of both radial and axial loads.

Because the spherical sliding contact area of the joint bearing is large and the inclination angle is large, at the same time, because most of the joint bearings adopt special processing methods, such as surface phosphating, galvanizing, chromium plating or outer sliding surface lining, padding, spraying and so on, they have greater load capacity and impact resistance, and have corrosion resistance and wear resistance. Damage, self-alignment, good lubrication or self-lubrication without pollution of lubricating dirt, even if the installation is misaligned, it can work normally. Therefore, joint bearings are widely used in low speed swing motion, tilt motion and rotation motion.

Next, we will learn about the performance of the joint bearing. Because the structure and working mechanism of the joint bearing are completely different from that of the rolling bearing, the joint bearing has its own technical characteristics and maintenance requirements.

1. Working temperature

The allowable working temperature of the joint bearing is mainly determined by the matching materials between the sliding surfaces of the bearing, especially the plastic sliding surface of the self-lubricating joint bearing. At high temperature, the bearing capacity of the joint bearing will decrease.

2. inclination angle

The inclination angle of the joint bearing is much larger than that of the general adjustable rolling bearing. It is very suitable for the support parts with low concentricity requirement. The inclination angle of the joint bearing varies with the bearing structure size, type, sealing device and support form. The inclination angle range of the general centripetal joint bearing is 3 ~15 degrees, and the angular contact joint bearing. The inclination range of thrust joint bearings is from 2 to 3 degrees, and the inclination range of thrust joint bearings is from 6 to 9 degrees.

3. coordination

In any case, the matching selection of the joint bearing shall not cause uneven deformation of the ring. The matching nature and grade of the joint bearing shall be determined according to the working conditions such as bearing type, support form and load size.

4. loading and unloading

The loading and unloading of joint bearings should follow the following principles: the force exerted by assembly and disassembly can not be transmitted directly through the spherical sliding surface. In addition, auxiliary loading and unloading tools, such as sleeves and dismantlers, should be used to apply the external loading and unloading force directly and evenly on the matching rings, or to carry out unloaded loading and unloading by heating and other auxiliary methods.

5. installation

When assembling the joint bearing series, it is necessary to pay special attention to the position of the outer ring partition surface. In order to avoid the load acting directly on the partition surface, it is necessary to maintain the partition surface at a right angle with the coincidence direction.

6. lubrication

The oil-fed joint bearing can be operated without lubrication when the load and swing motion are very small. Nevertheless, in general, it is necessary to supplement oil regularly. In the initial installation and operation, it is suggested that the lubrication cycle should be moderately shortened.

Oil-free joint bearings can be used without lubrication. However, if lithium soap-based grease is added before operation, the service life of the joint bearing will be prolonged. If grease is injected into the space around the bearing, the joint bearing will be more effective in preventing the invasion of dust and foreign bodies.

If you need to know more about bearings, please contact us. Our mailbox is yuki@ywsbearing.com.