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Products Description
In the narrow sense, the rod end joint bearing should refer to the so-called fish eye joint. According to the connection method, the external fisheye joint series is divided into internal thread series SIG and external thread series SAG. The size of the internal and external threads is the same as the inner diameter of the fish eye, such as the fish eye joint of the M12 joint, and the inner diameter of the bearing is D12. Joint bearings are widely used in engineering hydraulic cylinders, forging presses, engineering machinery, automation equipment, automobile shock absorbers, water conservancy machinery and other industries. The vibration of the rod end spherical plain bearing is very sensitive to the damage of the rod end spherical plain bearing, such as spalling, indentation, corrosion, cracks, wear and so on. , which will be reflected in the vibration measurement of the rod end.
Therefore, vibration can be measured using a dedicated rod end vibration meter (frequency analyzer, etc.). ), and the specific abnormal situation cannot be deduced by frequency division. Due to the different service conditions of the rod end or the installation position of the sensor, the measured values are also different. It is necessary to analyze and compare the measured values of each machine in advance to determine the judgment standard. Usually, the temperature of the rod end can be inferred from the temperature outside the rod end housing. It would be more appropriate if the temperature of the outer ring of the rod end could be measured directly through the oil hole. Usually, with the operation of the rod end joint bearing, the temperature of the rod end joint bearing starts to rise slowly, and reaches a steady state after 1-2 hours. The normal temperature of the end spherical plain bearing varies with the heat capacity, heat dissipation, speed and load of the machine.
If the lubricated and installed parts are properly installed, the temperature of the rod end will rise sharply and abnormally high temperature will appear. At this point, operation must be stopped and necessary precautions taken. The thermal sensor can monitor the working temperature of the rod end joint bearing at any time. When the temperature exceeds the specified value, it will automatically alarm or stop the machine to prevent shaft burning accidents. Edit 1 for installation and removal. Where a press is lacking or not available, end rod spherical plain bearings can be installed with an assembly sleeve and a small hammer. The hammering force should be evenly transmitted to the entire circumference of the end face of the joint bearing ring of the end rod, so the hammering end face of the assembly sleeve should be made into a spherical shape. 2. The force required to install the end rod joint bearing is related to the size of the joint bearing and the size of the fit interference. For medium and large joint bearings with large interference, the shrink fitting method is usually used. Before heating, put the end rod joint bearing or the separable joint bearing ring into the oil tank or a special heater, and heat it evenly to 80-100°C, not exceeding 100°C.
3. Shrink-fit joint bearings require skilled operation skills. When the joint bearing is taken out from the heating tank or heater, immediately wipe off the oil stains and attachments on the surface of the joint bearing with a clean cloth (note that cotton yarn cannot be used), then place it in front of the mating surface, and push the joint bearing against the surface in one operation on the shoulder. During the cooling process, it should always be pushed tightly, or tapped with a small hammer through the assembly sleeve to press the joint bearing tightly. When installing the end rod joint bearing, the joint bearing should be turned slightly to avoid tipping or jamming during installation. 4. When the outer ring of the end rod joint bearing is tightly fitted with the housing hole, the housing can also be heated and installed in the joint bearing. Especially for light metal spherical plain bearings, in the process of tight fitting, the mating surface may be damaged by the extrusion of the outer ring. In this case, the end rod spherical plain bearing should be heated first.
Install, remove and edit. There are several types of regular maintenance for common rod end joint bearings: In order to ensure the normal operation of the main engine, according to the requirements of the main engine and the design theory and use experience of the bearing, a maintenance cycle is set for regular maintenance. Repair: When the bearing fails, stop the machine for inspection and repair. Early warning: apply advanced bearing fault diagnosis technology, stop real-time monitoring of bearing operating status, give warning before bearing breaks out, and stop maintenance. 1. Regular maintenance: In order to ensure the normal operation of the main engine, a maintenance cycle is set for regular maintenance according to the requirements of the main engine and the design theory and use experience of the bearing. 2. Fault maintenance: When the bearing fails, stop the machine for inspection and maintenance.
3. Pre-warning maintenance: Apply advanced bearing fault diagnosis technology to stop real-time monitoring of bearing operating status, send a notice before the bearing breaks out, and stop maintenance. During the operation of the bearing, there will inevitably be sound, temperature, vibration and other phenomena. Therefore, regarding the maintenance of running bearings, we can find the abnormal changes of the bearings by listening, touching, observing and using the bearing fault diagnosis instrument, and judge whether the rod end joint bearings are in normal working condition according to the changed state. Disclaimer: Kuaixue Encyclopedia entries are created, edited and maintained by netizens. If you find that the entries in Kuaixuepedia are inaccurate or incomplete, you are welcome to go to the entry editing page to participate in the editing and modification of the entries.
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