Joint bearing is a kind of spherical sliding bearing, the sliding contact surface is an inner spherical surface and an outer sphere, rotary oscillation motion can be in any Angle, it USES the surface phosphating, Fried, padded, spraying and other special craft processing method.Joint bearing with large load capacity, impact resistance, corrosion resistance, wear resistance, from the heart, good lubrication, etc.
Joint bearing structure than the rolling bearing is simple, its mainly by a spherical within the inner ring and a spherical outer ring.Joint bearing is generally used in low speed of the swinging motion (that is, the angular motion), due to the sliding surface of spherical shape, can be tilted movement in certain Angle range (that is, the heart movement), the supporting shaft and the shaft shell hole concentricity is bigger, can still work normally.
The characteristics ofJoint bearing can bear larger load.According to the different types and structure, can bear radial load, axial load or the joint of the radial, axial load.Because the inside is outside the sphere with composite material, so the bearing can produce self-lubrication at work.Oscillating motion is generally used in low speed, and low speed rotation, can also be tilted movement within a certain Angle, when the supporting shaft and shaft shell hole concentricity is bigger, can still work normally.Self-lubricating bearing joints used in water conservancy, professional machinery and other industries.
application
Since the bearing lubrication joints
Joint bearing is widely used in engineering hydraulic oil cylinder, forging machine tools, engineering machinery, automation equipment, automobile shock absorber, hydraulic machinery and other industries.Joint bearing is a spherical plain bearing, basic is made up of a spherical sliding on the surface of the sphere contact of inner and outer ring.According to its structure and type of different, can bear radial load and axial load, or the role of the radial, axial and joint load.
Because joint bearing spherical sliding contact area is large, slope Angle is large, but also because most of the joint bearing adopted special processing methods, such as surface phosphating, galvanized, chrome plating, or outside sliding surface lining, padded, spraying, etc., so the larger load capacity and impact resistant ability, and have the corrosion resistance, wear resistance, can make, good lubrication and self-lubricating without lubrication characteristics of sewage pollution also can work normally even install dislocation.As a result, the motion of the joint bearing is widely used in low speed movement, tilted movement and rotation motion.
composition
Joint bearing is mainly composed of an outer ring and an inner ring.Within the outer ring of the spherical surface and inner ring composed of outer spherical surface rolling friction pair.
Joint bearing
Due to the structure and working mechanism of joint bearing and rolling bearing is completely different, so the joint bearing has its own technical characteristics and maintenance requirements.
Working temperature
Joint bearing allowed working temperature is mainly composed of bearing is determined by the material of the matching between the sliding surface, especially since the type of joint bearing lubrication sliding surface of plastic material, when high temperature with the decrease of the carrying capacity of the trend.Such as joint bearing lubrication sliding surface material matching for steel/steel, its allowable working temperature depends on the permissible operating temperature of lubricant.But for all type of lubrication and type self-lubricating bearing joints, can be in - 30 ℃ ~ + 80 ℃ temperature range of use, and keep the right to bear ability.
Angle
Joint bearing Angle adjustable than general heart of rolling bearing, very suitable for use in supporting parts of the concentricity requirement is not high, the joint Angle with the bearing structure of the bearing size, type, seal and bearing, in the form of general centripetal knuckle bearing range Angle is 3 ° ~ 15 °, angular contact bearing joints Angle range is 2 ° ~ 3 °, thrust bearing joint Angle range is 6 ° ~ 9 °.
Cooperate with
In any case, the joint cooperation shall be selected for bearing the uneven deformation in the ring, its nature and the choice of level must according to the bearing type, bearing form and size and load working conditions to decide.
Loading and unloading
Joint bearing
Loading and unloading of joint bearing should follow the following principles, that is, the force imposed by the assembly and disassembly can't directly pass through the spherical sliding surface.In addition, you should use the auxiliary handling tools such as socket, puller, etc., the loading and unloading force imposed by the outside directly and evenly to cooperate on the ring, or with no load on the auxiliary methods such as loading and unloading of heating.
When assembling joint bearing series, it is necessary to give special attention to outer ring segmentation position below.To avoid load acting directly on the segmentation, segmentation must be maintained at right angles to the conform to the direction direction.
lubrication
When the applied load and produced are very hour, the speed of the swinging motion to oil type joint bearing can operate in the case of no lubrication.Even so, the general situation must add oil on a regular basis.In the installation work for the first time, it is recommended that the lubrication cycle should be moderately reduced.
No give no lubrication oil bearing type joint can under the circumstances of use.However, if before operation to join lithium soap base oils, the use of joint bearing period will be extended much more.If dimensional infuse grease around the bearing, joint bearing will be more effective protection of dust and the invasion of foreign bodies.