Spherical plain bearing for NSK are spherical sliding bearings. The basic type is composed of inner and outer rings with spherical sliding spherical contact surfaces. spherical plain bearing for NSK are mainly composed of an inner ring with an outer spherical surface and an outer ring with an inner spherical surface, and can withstand larger loads. Depending on its type and structure, it can bear radial load, axial load or a combined load of both radial and axial directions. Since the outer spherical surface of the inner ring is inlaid with composite material, the bearing can produce self-lubrication during operation. It is generally used for swing motions with low speed, and can also be used for tilting motion within a certain angle range. When the support shaft and the shaft housing hole are not concentrically large, it can still work normally. Self-lubricating joint bearings are used in water conservancy, professional machinery and other industries. Because the spherical sliding contact area of spherical plain bearing for NSK is large and the inclination angle is large, and also because most spherical plain 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-aligning, good lubrication or self-lubricating without lubricating dirt pollution, and it can work normally even if the installation is misaligned. Therefore, spherical plain bearings are widely used for low-speed swing motions, tilting motions and rotational motions. Spherical plain bearings and rod ends are available in a variety of designs with different combinations of sliding contact surfaces. Each design and combination has unique properties that make it particularly suitable for certain applications.
Rod end spherical bearing vibration is very sensitive to rod end spherical bearing damage, such as peeling, indentation, rust, cracks, wear, etc., which will be reflected in the rod end spherical bearing vibration measurement. Therefore, by using a special rod end spherical plain bearing vibration A measuring instrument (frequency analyzer, etc.) can measure the size of the vibration, and the specific abnormality can be inferred from the frequency analysis. The measured values vary depending on the usage conditions of the rod end spherical bearings or the installation position of the sensor. Therefore, it is necessary to analyze and compare the measured values of each machine in advance to determine the judgment criteria. The temperature of the rod end spherical bearing can generally be inferred from the temperature outside the rod end spherical bearing chamber. It would be more appropriate if the oil hole can be used to directly measure the outer ring temperature of the rod end spherical bearing. Usually, the temperature of the rod end spherical plain bearing begins to rise slowly as the rod end spherical plain bearing operates, and reaches a stable state after 1-2 hours. The normal temperature of the rod end spherical plain bearing varies depending on the heat capacity, heat dissipation, rotation speed and load of the machine. If the lubrication and mounting parts are appropriate, the temperature of the rod end joint bearing will rise sharply and abnormally high temperatures will occur. At this time, the operation must be stopped and necessary preventive measures must be taken. Thermal sensors can be used to monitor the operating temperature of the rod end spherical bearing at any time, and automatically alarm or stop when the temperature exceeds the specified value to prevent shaft burning accidents.
Type: Radial spherical plain bearing requiring maintenance
Maintenance-free spherical plain bearings
Angular contact spherical sliding bearings
Spherical sliding thrust bearing
Rod ends
To select a certain bearing type, and to determine the required bearing size, the main factors that must be considered are the load, the load capacity of the bearing and the expected service life. The same is true when selecting rod ends. According to the GB/T9161 standard, its types can be divided into: curved rod open ball end spherical plain bearings (type code: SQ); straight rod open ball head rod end spherical plain bearings (type code: SQZ); single rod open ball end spherical plain bearings (type code: SQZ) End spherical plain bearing (type code: SQD); left-hand internal thread assembled rod end spherical bearing (type code: SLLB); left-hand external thread assembled rod end spherical bearing (type code: SALB); left-hand bent rod end joint Bearing (type code: SLLB); left-hand single rod type rod end spherical plain bearing (type code: SQLD); rod end spherical plain bearing with cylindrical welding (cylindrical type) (type code: SK); welded type with flat base Rod end spherical plain bearing (square type) (type code: SF); locking rod end spherical bearing (type code: SLR).
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