Classification of rod end bearings:
Rod end joint bearing EH series (reinforced); rod end joint bearing EG series (reinforced); inch size rod end plain bearing normal series (size series code Z); rod end joint bearing JK series (size series code JK ). Its structural material code and clearance group code are like joint bearings.
Stern rod end bearings are mainly used for support parts with low concentricity requirements, high working surface pressure, and slow swing and slewing motion.
Stern rod ends are sliding bearings. They are of wear-resistant non-metallic lubricating type and oil channel oil-lubricating type.
Similar to GE20-ET, GE15-ET, etc. are articulated bearings, and the suffix is a specific type.
Joint bearings are divided into GE, GEC, GEG, GEEW, GEK, GEH and other types, sizes and lubrication methods are different, can be found in the mechanical design manual sliding bearing classification.
Narrowly defined rod-end articulated bearings should be commonly referred to as fish-eye joints.
The difference between the internal and external wires of the catfish eye joint is: internal thread series SIG and external thread series SAG.
The size of the inner and outer wires is the same as the inner diameter of the fisheye. For example, the connector is M12 fisheye connector, and the inner diameter of the bearing is D12.
Joint bearings are widely used in engineering hydraulic cylinders, forging machine tools, engineering machinery, automation equipment, automotive shock absorbers, hydraulic machinery and other industries.
Rod end joint bearing vibration is very sensitive to the damage of the rod end joint bearing. For example, peeling, indentation, rust, crack, wear and so on will be reflected in the vibration measurement of the rod end joint bearing. Therefore, by using a special rod end joint bearing vibration The measuring instrument (frequency analyzer, etc.) can measure the magnitude of the vibration, and the specific situation of the abnormality cannot be inferred from the frequency division. The measured values vary depending on the use conditions of the rod-end articulated bearing 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 standard.
The temperature of the rod end joint bearing can generally be estimated by the temperature outside the rod end joint bearing. It is more suitable if the temperature of the outer ring of the rod end joint bearing can be directly measured. Generally, the temperature of the rod end joint bearing gradually rises with the operation of the rod end joint bearing, and reaches a steady state after 1-2 hours. The normal temperature of the rod end joint bearing varies with the machine's heat capacity, heat dissipation, speed and load. If the lubrication and installation parts are suitable, the temperature of the rod end joint bearing will rise sharply, and abnormal high temperatures will occur. At this time, the operation must be stopped and necessary precautions must be taken. The use of a thermal sensor can monitor the working temperature of the rod end joint bearing at any time, and can automatically alarm or stop when the temperature exceeds the specified value to prevent a shaft accident.