spherical plain bearing

Joint bearing is a spherical plain bearing, sliding contact surface is a spherical inner and an outer sphere, the movement can be rotated at any angle swing, which uses surface phosphide, fried mouth, insert a variety of special treatment pad, such as spraying The method is made. Spherical plain bearings with large load capacity, impact resistance, corrosion resistance, wear resistance, self-aligning, lubrication is good.

Feature
Joint bearing can withstand a greater load. According to their different types and structures to withstand radial load, axial load or radial, axial joint load. Since the inner surface of the outer sphere inlaid with composite materials, so the bearing can be generated in the work of self-lubricating. Generally used for lower-speed swing motion, and low-speed rotation, but also for a certain tilt angle range of motion when supporting shaft and housing bore axis misalignment is large, still work. Self-lubricating bearings used in water conservancy, specialized machinery and other industries.
application

Self-lubricating bearings
Joint bearings are widely used in hydraulic engineering, metal forming machine tools, engineering machinery, automation equipment, automobile shock absorber, water conservancy machinery and other industries. Joint bearing is spherical plain bearing, the basic type is within the spherical sliding spherical contact surface of the outer ring. Depending on the structure and type, can bear radial load, axial load or radial, axial joint load.
Because spherical plain bearings sliding contact area is large, the tilt angle is large, but also because most of the articular bearing to a special treatment process, such as surface phosphate, zinc, chrome or outside the sliding surface lining, insert pads, such as spraying, Therefore, greater load capacity and impact resistance, and has anti-corrosion, wear resistance, self-aligning, self-lubricating lubrication or no lubrication good dirt pollution characteristics, even if the dislocation can be installed to work properly. Therefore, joint bearings are widely used for lower-speed swing motion, tilt and rotational movement.

Spherical plain bearings
(1) GE ... E-type: Every single outer ring, no oil tank. Can withstand the radial load and smaller in either direction axial load.
(2) GE ... ES type: single slit outer ring with oil tank. Can withstand the radial load and smaller in either direction axial load.
(3) GE ... ES-2RS type, GEEW ... ES-2RS type: single slit outer ring with oil tank, sides with a ring. Can withstand the radial load and smaller in either direction axial load.
(4) GE ... ESN type: single seam outer ring, GE ... XSN type: double-slit outer ring (split outer ring), there are oil tank, with snap groove on the outer ring. Can withstand the radial load and smaller in either direction axial load. But by the snap ring axial load to bear, its ability to withstand axial load is reduced.
(5) GE ... HS type: inner ring with oil tank, double half outer ring, worn clearance can be adjusted. Can withstand the radial load and smaller in either direction axial load.
(6) GE ... DE1 type: inner ring of hardened bearing steel, bearing steel outer ring. When the inner extrusion assembly with lubrication grooves and hole. An inner diameter of less than 15mm bearings, no lubrication groove and hole. Can withstand the radial load and smaller in either direction axial load.
(7) GE ... DEM1 type: inner ring of hardened bearing steel, bearing steel outer ring. When the inner assembly extrusion, bearing into the bearing housing, the pressure on the outer end of the groove of the bearing axial fixation. Can withstand the radial load and smaller in either direction axial load.
(8) GE ... DS type: outer ring fitting groove and lubrication grooves. Limited to large size bearings. Can bear radial load and any direction of smaller axial load (fitting groove side can not bear axial load).
Angular contact spherical plain bearings
GAC ... S-type inner and outer rings are hardened bearing steel outer ring grooves and hole. Can withstand the radial load and an axial direction (joint) load.
Thrust bearings
GX ... S-type shaft ring and seat are hardened bearing steel; seat and have a sump hole. Can withstand a direction of axial load or combined load (radial load value at which time shall not exceed 0.5 times the value of axial load).

Self-lubricating spherical plain bearings
(1) GE ... C-type and GE ... T Type: extruded outer, outer sliding surface for the sintered bronze composite; inner ring of hardened bearing steel, hard chrome plated slide. Confined to a small-sized bearings. Outer ring of bearing steel, the sliding surface of the fabric layer of polytetrafluoroethylene. Inner ring of hardened bearing steel, hard chrome plated slide. Can withstand the same load direction, the radial load at the same time, can withstand a small axial load in either direction.
(2) GE ... CS-2Z type: outer ring of the bearing steel, sliding surface for the sintered bronze composite; inner ring of hardened bearing steel, hard chrome plated slide; both sides with a dust cover. Can withstand the same load direction, the radial load at the same time able to withstand smaller in either direction axial load.
(3) GEEW ... T Type: outer ring of the bearing steel, sliding surface layer of Teflon fabric; inner ring of hardened bearing steel, hard chrome plated slide. Can withstand the same load direction, the radial load, and can withstand a small axial load in either direction.
(4) GE ... F-type: the outer ring of hardened bearing steel, sliding surface of PTFE additives, glass fiber reinforced plastic, inner ring of hardened bearing steel, hard chrome plated slide. Can withstand the same direction moderate radial loads.
(5) GE ... F2 type: glass fiber reinforced plastic outer ring, sliding surface of PTFE as an additive to glass fiber reinforced plastics; inner ring of hardened bearing steel, hard chrome plated slide. Can withstand the same direction moderate radial loads.
(6) GE ... FSA-type outer ring of carbon steel, the sliding surface with Teflon additive composition of glass fiber reinforced plastic discs, and with the holder fixed to the outer ring; inner ring of hardened bearing steel. For large and extra large bearings. Can withstand high radial loads.
(7) GE ... FIH-type outer ring of hardened bearing steel; inner ring of carbon steel, the sliding surface with Teflon additive composition of glass fiber reinforced plastic discs, and with the holder fixed to the inner ring; double half outer ring. For large and extra large bearings. Can withstand high radial loads.
Self-lubricating angular contact spherical plain bearings
GAC ... F-type outer ring of hardened bearing steel; sliding surface of PTFE as an additive to glass fiber reinforced plastics; inner ring of hardened bearing steel, hard chrome plated slide. Can withstand the radial load and an axial direction (joint) load.
Self-lubricating thrust bearings
GX ... F-type race hardened bearing steel, sliding surface of PTFE as an additive of glass fiber reinforced plastic shaft ring of hardened bearing steel, hard chrome plated slide. Can withstand a direction of axial load or combined load (radial load values of this point can not be more than 0.5 times the axial load value).

Mechanical properties calculation methods in joint bearing

Spherical contact surfaces bearing joint (spherical plain bearing) has two "fit", which is called the contact coordinate contacts. Spherical Plain Bearings mechanical properties calculation methods in structural design plain bearings and wear analysis plays an important role. Coordination calculated surface contact pressure is a very complex issue, due to the limited existing Hertz model elastic half space, can not be used to calculate the spherical coordinate the contact pressure distribution. There are already a spherical contact unification model, namely Fang model, can solve the deformation problem of small spherical contact pressure distribution, the model for non-contact and coordination coordination contacting apply. But the contact area is not a complete spherical plain bearings, calculate the contact pressure distribution calculated on the basis of the need for further coordination sphere complete the contact model. In addition, the use of joint bearing will also appear free boundary effects, the joints bearing applications will have an impact. Free boundary effect produces contact pressure in the joints bearing outer edge focus and a large pressure gradient.