Reason analysis and technical description of WRY Wu'an heat transfer oil pump vibration exceeding the standard
WRY Wu'an heat transfer oil pump vibration exceeded the cause analysis and technical description 1. Ground fastening. When a defect occurs, first check whether the prime mover and the anchor bolt of the WRY Wuan heat transfer oil pump are tightly fastened. If the foundation is unstable, it will inevitably cause the oil pump to vibrate. When the other reasons are eliminated and the problem cannot be solved, the cause analysis and technical description of the WRY Wuan heat conduction oil pump vibration exceeding the standard
1. Ground fastening.
When a defect occurs, first check whether the prime mover and the anchor bolt of the WRY Wuan heat transfer oil pump are tightly fastened. If the foundation is unstable, it will inevitably cause the oil pump to vibrate. When other problems are eliminated and the problem cannot be solved, it is necessary to consider whether the foundation strength of the foot is sufficient. Sometimes, due to design reasons, the soft foundation can also cause vibration. For example, when repairing a pump in a power plant, the vibration of the condensed pump test pump exceeds the standard, reaching 0.20mm, and then the rib is strengthened on the motor bracket, and the vibration is reduced to 0.05mm.
2. Find the center.
The center is also a common cause of vibration, and the center must be adjusted within the specified range in strict accordance with the standard.
3. Bearing inspection.
If the oil pump is a sliding bearing, the vibration cannot be eliminated after the above work. The contact condition of the bearing bush should be checked. The normal bearing bush and the lower tile should have uniform contact marks. The WRY Wuan heat transfer oil pump is mainly distributed in the middle and lower parts, and the contact area should be Up to 75% or more, there should be a gap in the upper tile, generally taking 0.1-0.15% of the shaft diameter. The upper tile gland should have a clamping force of 0.02-0.02 mm on the upper tile. If the requirements are not met, it is generally solved by adding and reducing the gasket at the mouth of the tile and scraping the bearing bush. If it is an oil pump that adopts a rolling bearing, the bearing force of the bearing gland should be measured. Generally, an expansion gap of about 0.20 mm should be left in order to prevent the bearing from being axially stressed when the rotor is expanded under heat.
4. Rotor center position adjustment.
The oil pump rotor should be concentric with the stator. Otherwise, static and dynamic friction will occur when the oil pump is running, and vibration will occur. The adjustment of the center position of the oil pump rotor can generally be achieved by adjusting the radial position of the oil pump bearing. For the center adjustment of the oil pump with bearing support, the bearing bushes on both sides of the oil pump should be raised at the same time to meet the requirements. Generally, the lifting height is half of the gap of the sealing ring, and the two sides are also the same. Botaibang for the oil flat open WRY Wu'an heat transfer oil pump, if necessary, the oil pump cover can be opened, directly measure the gap at the seal ring, after the adjustment is passed, the pin hole is arranged between the bearing support and the pump body. Then assemble again to achieve the purpose of precise adjustment.
5. Measurement and adjustment of shaft bending, sway of the rotor after small installation, and scoring deviation.
If the cause of the shock is not found externally, the oil pump can only be disassembled. First measure and correct the shaft bending. After no problem, the rotor will be mounted small, and the overall sway and scoring deviation will be measured. If it exceeds the standard, it must be corrected.
5. Dynamic and static balance detection.
After the oil pump is disintegrated, in order to avoid vibration during pumping, each stage of the impeller should be statically balanced. If conditions permit, it should be tested for dynamic balance, especially for large multi-stage oil pump dynamic balance test.
The effect of external conditions on the oil pump.
When all the problems that may be present in the pump itself are completely eliminated, if the vibration problem cannot be solved, the influence of external conditions on the oil pump should also be considered. For example, the resonance caused by the natural frequency of the oil pump and the vibration frequency, the vibration of the oil pump caused by the failure of the prime mover, and the connection between the pipeline and the oil pump can also cause abnormal vibration of the oil pump due to strong counterparts. Generally take appropriate measures to solve the problem
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