Gear pump noise is caused by what causes? The first time the use of gear pump noise should pay attention to the following points: First, the gear pump and coupling due to irregularities in the requirements of the vibration and noise. Should be required to adjust the coupling. Second, due to dirt in the oil into the gear pump pump gear and other components caused by wear and tear and noise. Should replace the oil, strengthen the filter, open the pump cleaning; serious wear and tear of the gear, to be repaired or replaced. Third, serious damage or wear gear pump parts will produce vibration and noise: such as the tooth or the error of the pitch error, poor contact between the two gears, tooth surface roughness, overtone the length of the common law, the tooth backlash is too small , The contact area of ​​the two meshing gears is not in the indexing circle position or the like. At this point, you can change the gear or the gear on the ground. At the same time, the bearing needle cage damage, the length of the shaft journal and needle wear, etc., can lead to poor bearing rotation and mechanical noise, this need to disassemble the gear pump, needle roller bearings replacement. Fourth, the gear pump gear assembly gap is too small; the gear end face and the front and rear cover between the sliding surface due to the gear assembly before the burr failed to carefully remove, so as to strain the joint operation, so that the internal leakage, resulting in The output flow is reduced; the dirt enters the pump and wedges into the gap between the end face of the gear and the front and back end caps to strain the mating surface, resulting in the connection of the high and low pressure cavities due to the radial tensioned grooves, so that the output flow rate is reduced. The above measures should be used to repair the following measures. Disassemble the gear pump, appropriately increase the axial gap that is grinding the end face of the gear; with a surface grinder polished front and rear cover end face and the gear end face and remove gear on the burr (can not be chamfered); The depth of the unloading trough on the end face of the end cap will vary, and the width should be appropriately increased. If you notice the above gear pump noise during use should be reduced a lot.
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