Linqing Rongwei Bearing Manufacturing Co., LTD

1、 Concept

Spherical Plain BearingIt is a spherical sliding bearing with a sliding contact surface consisting of an inner spherical surface and an outer spherical surface, which can rotate and swing at any angle during motion. It is made using various special processing methods such as surface phosphating, blasting, padding, and spraying. Joint bearings have the characteristics of high load capacity, impact resistance, corrosion resistance, wear resistance, self centering, and good lubrication.

2、 Characteristics

Spherical Plain BearingCapable of withstanding large loads. According to their different types and structures, they can withstand radial loads, axial loads, or combined loads of both radial and axial loads. Due to the composite material embedded on the outer spherical surface of the inner ring, the bearing can generate self lubrication during operation.

It is generally used for low-speed swinging motion and low-speed rotation, and can also perform tilting motion within a certain angle range. When the support shaft is not concentric with the shaft housing hole, it can still work normally. Self lubricating joint bearings are used in industries such as water conservancy and professional machinery.

3、 Application

Spherical Plain BearingWidely used in industries such as engineering hydraulic cylinders, forging machines, construction machinery, automation equipment, automotive shock absorbers, and water conservancy machinery. Joint bearings are spherical sliding bearings, and the basic type consists of an inner and outer ring with a spherical sliding spherical contact surface. Depending on its structure and type, it can withstand radial loads, axial loads, or combined loads of both radial and axial forces.

Because the spherical sliding contact area and inclination angle of joint bearings are large, and at the same time, most joint bearings adopt special processing methods such as surface phosphating, galvanizing, chrome plating, or outer sliding surface lining, padding, spraying, etc.

Therefore, it has a large load capacity and impact resistance, and has the characteristics of corrosion resistance, wear resistance, self centering, good lubrication, or self-lubricating without contamination from lubricating dirt. Even if installed incorrectly, it can work normally. Therefore, joint bearings are widely used for low-speed swinging, tilting, and rotating movements.

4、 Composition

Spherical Plain BearingIt is mainly composed of an outer ring and an inner ring. The inner spherical surface of the outer ring and the outer spherical surface of the inner ring form a rolling friction pair.

5、 Joint bearing performance

Due to the completely different structural form and working mechanism of joint bearings from rolling bearings, joint bearings have their own technical characteristics and maintenance requirements.

1. Working temperature

Spherical Plain BearingThe allowable working temperature is mainly determined by the matching materials between the sliding surfaces of the bearings, especially the plastic sliding surfaces of self-lubricating joint bearings, whose load-bearing capacity tends to decrease at high temperatures. When the sliding surface material of a lubricated joint bearing is paired with steel, its allowable working temperature depends on the allowable working temperature of the lubricant. But for all lubricated and self-lubricating joint bearings, they can be used within the temperature range of -30 ℃ to+80 ℃ and maintain the correct bearing capacity.

2. Tilt angle

The inclination angle of joint bearings is much larger than that of general adjustable rolling bearings, making them suitable for use in support areas with low concentricity requirements. The inclination angle of joint bearings varies with the size, type, sealing device, and support form of the bearing structure. Generally, the inclination angle range of radial joint bearings is 3 ° -15 °, the inclination angle range of angular contact joint bearings is 2 ° -3 °, and the inclination angle range of thrust joint bearings is 6 ° -9 °.

3. Cooperate

In any case, the fitting selected for joint bearings must not cause uneven deformation of the ring, and the selection of the fitting nature and grade must be determined based on 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 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, disassemblers, etc. should be used to directly and uniformly apply the external loading and unloading forces to the matched rings, or to use auxiliary methods such as heating for unloaded loading and unloading.

5. Installation

When assembling the joint bearing series, it is necessary to pay special attention to the position of the outer ring dividing surface. To avoid direct load on the dividing surface, it is necessary to maintain the dividing surface at a right angle to the corresponding direction.

6. Lubrication

When the speed generated by the applied load and swinging motion is low, the oil fed joint bearing can operate without lubrication. However, it is generally necessary to regularly replenish oil and fat. It is recommended to shorten the lubrication cycle moderately during the initial installation and operation.

Oil free joint bearings can be used without lubrication. However, if lithium soap based grease is added before operation,Spherical Plain BearingThe usage period can be further extended. If grease is injected into the space around the bearing, the joint bearing will be more effective in protecting against the invasion of dust and foreign objects.