Introduction to maintenance methods of turntable bearings

Mar 01, 2024

Slewing bearings, also known as slewing bearings or rotating platforms, are special bearings that can withstand composite loads such as radial load, axial load, and overturning moment. Slewing bearings are widely used in wind power generation, port machinery, engineering machinery, medical equipment, radar antenna bases, and other fields. Due to its complex loads and harsh working environment, the maintenance of slewing bearings is particularly important.

1. Troubleshooting of slewing bearings

Before repairing the slew plate bearing, it is first necessary to diagnose the bearing to clarify the type and extent of the fault. Common troubleshooting methods include:

Appearance inspection: Observe the appearance of the bearing and check for obvious damage such as cracks, wear, and rust. At the same time, check whether any abnormalities exist in the bearing seat and surrounding components.

Sound diagnosis: By listening to the sound of the bearing when it is running, determine whether there are abnormal sounds, vibrations, and other abnormalities. Abnormal sounds may indicate problems such as wear and looseness inside the bearing.

Temperature monitoring: During the operation of the bearing, the working status of the bearing is judged by monitoring the temperature changes of the bearing. Abnormal temperature increases may indicate bearing overloading, poor lubrication, etc.

Vibration analysis: Vibration sensors are used to monitor bearing vibration and analyze the characteristics of vibration signals to determine the type and degree of bearing failure.

2. Disassembly and installation of turntable bearings

After the fault diagnosis results are clear, the slew plate bearing needs to be disassembled and installed. The following points need to be noted during disassembly and installation:

Preparation before disassembly: Ensure the work site is clean and dry, and prepare the required disassembly tools and protective equipment. At the same time, mark the bearing and its surrounding components so that they can be repositioned correctly during installation.

Disassembly process: Gradually disassemble the bearing and its peripheral components according to the prescribed disassembly sequence. Avoid using excessive force or violent disassembly to avoid damaging the bearings or related components during disassembly.

Installation process: When installing the bearing, make sure that the size and shape of the bearing seat hole meet the requirements and the cleanliness meets the requirements. Assemble according to the specified installation sequence and tightening torque to ensure the correct installation of the bearing.

3. Repair and replacement of turntable bearings

The slew bearing may need to be repaired or replaced depending on the fault diagnosis. The specific method is as follows:

Repair: For cases where the wear is relatively light, and there is no need to replace the entire bearing, repair methods can be used. Repair methods include surface coating repair, turning repair, etc. During the repair process, attention should be paid to maintaining the accuracy and surface quality of the bearing.

Replacement: For bearings that are severely worn and cannot be repaired, the entire bearing needs to be replaced. When replacing bearings, select those that match the original bearing model and specifications and install them according to the prescribed installation steps.

4. Maintenance and maintenance of turntable bearings

Regular maintenance and upkeep are required to extend the service life of the slew plate bearing and reduce the possibility of failure. Specific measures include:

Regular inspection: Regularly conduct visual inspection, sound diagnosis, temperature monitoring, and vibration analysis of bearings to discover and deal with potential problems on time.

Lubrication and maintenance: Lubricate and maintain the bearings according to the prescribed lubrication cycle and method. Choose the appropriate lubricant to ensure the bearing's normal operation and lubrication effect.

Cleaning and maintenance: Clean the bearings and surrounding parts regularly to remove oil, dust, and other debris, and keep the bearings clean and dry.

Overload protection: During use, it is necessary to prevent the bearing from bearing excessive loads and impacts and take necessary overload protection measures to reduce bearing wear and damage.

Maintenance of slew bearings is a complex and important task. Through fault diagnosis, disassembly and installation, repair and replacement, maintenance and upkeep, the normal operation of the slew plate bearing can be effectively guaranteed, and its service life can be extended. In actual work, attention to detail and standardized operations are required to ensure maintenance quality and safety. At the same time, it is also necessary to strengthen technical training and experience accumulation, improve the professional quality and skill level of maintenance personnel, and provide a strong guarantee for the maintenance of slew bearings.