The Characteristics, Application and Performance of Joint Bearing

The sliding contact surface of spherical plain bearing is an inner spherical surface and an outer spherical surface. It can rotate and swing at any angle during movement. It is widely used in the industry and agriculture machines.

 

 

Characteristics of Spherical Plain Bearings

The spherical plain bearing has the characteristics of large load capacity, impact resistance, corrosion resistance, wear resistance, self-aligning and good lubrication. Spherical plain bearings can withstand larger loads. According to its different types and structures, it can bear radial load, axial load or combined load of radial and axial. Since the outer spherical surface of the inner ring is embedded with composite material, the bearing can generate self-lubrication during operation, which is generally used for low-speed swing movement and low-speed rotation.

 

 

Application of Spherical Plain Bearings

Spherical plain bearings are widely used in engineering hydraulic cylinders, agriculture machines, forging machine tools, engineering machinery, automation equipment, automotive shock absorbers and hydraulic machinery. Because the spherical sliding contact area of the joint bearing is large and the tilt angle is large, and because most joint bearings adopt special processing methods, such as surface phosphating, galvanizing, chrome plating or outer sliding surface lining, inserting pads and spraying, it has a large load capacity and impact resistance, and has the characteristics of anti-corrosion, wear resistance, self-aligning, good lubrication or no lubrication pollution. Even if the installation is misplaced, it can work normally. Therefore, the joint bearing is widely used in swinging motion, tilting motion and rotating motion at low speed. For example, the joint is one of tractor parts.

 

 

Performance of Spherical Plain Bearings

Since the structure and working mechanism of spherical plain bearings are completely different from rolling bearings, spherical plain bearings have their own technical characteristics and maintenance requirements.

 

1.Operating Temperature

The allowable working temperature of the spherical plain bearings is mainly determined by the matching materials between the sliding surfaces of the bearings. Especially the sliding surface of the plastic materials of the self-lubricating spherical plain bearings will have a tendency to drop in load capacity at high temperatures. For example, when the material of sliding face of a lubricated spherical plain bearing is paired with steel, the allowable operating temperature depends on the allowable operating temperature of the lubricant. But for all lubricated and self-lubricated joint bearings, it can be used in the temperature range of -30 ℃ ～ + 80 ℃.

 

2.Inclination

The inclination angle of the spherical plain bearing is much larger than that of the general adjustable centering rolling bearing. It is very suitable for use in the bearing parts where the concentricity is not high.

 

3.Loading and Unloading

The loading and unloading of spherical plain bearings should follow the principle that the force applied by 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 forces exerted by the outside world on the matched ferrules.

 

4.Installation

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

 

5.Lubricating

When the speed of the applied load and the oscillating motion are very small, the oil-fed joint bearing can be operated without lubrication. Nevertheless, under normal circumstances it is necessary to replenish grease regularly. During the initial installation and operation, it is recommended that the lubrication period should be shortened appropriately.

 

 

Spherical plain bearings can be seen in some relatively large machines. For us, the most common is agriculture machines, and spherical plain bearings are tractor parts. Hopefully, this passage can help you learn more about the agriculture machine.