Rexroth variable piston pump common fault analysis

Rexroth variable piston pump piston pump operation will always have some trouble, such as oil spills, vibration, noise, overheating, etc., what causes it? Today, Xiaobian bring Rexroth variable piston pump common fault analysis, encountered these problems, the following introduction can provide a reference for everyone to tell you the reasons, methods. Details are as follows: Rexroth variable piston pump common fault analysis plunger pump oil spills: (1) spindle oil seal damaged or shaft defects, scratches; (2) internal leakage is too large, resulting in increased pressure at the seal, and the seal Damage or out; (3) the drain pipe is too thin, so that the seal oil spills; (4) pump external tubing loose, pipe joints damage, gasket aging or crack; (5) variable adjustment mechanism bolts loose, sealed Damaged; (6) cast iron pump casing with trachoma or poor welding. Piston Pump Vibration and Noise: (1) Mechanical Vibration and Noise If the pump shaft and motor shaft are not concentric or dead, the shaft bearing, coupling damage, pad damage and loose assembly bolts will generate noise. For high-speed operation or transmission of large energy pump, to regularly check and record the amplitude of each component, frequency and noise. If the frequency of rotation of the pump is the same as the natural frequency of the pressure valve, it will cause resonance and change the speed of the pump to eliminate the resonance. (2) the noise generated by the pipeline flow into the oil pipeline is too small, into the oil filter flow capacity is too small or blocked, the intake pipe into the air, the oil is too high, the oil surface is too low oil shortage and high pressure pipe In the liquid hammer and so on, will produce noise. Therefore, the correct design of the fuel tank, the correct choice of oil filters, tubing and directional valve. Plunger pump overheating: overheating for two reasons, one is mechanical friction heat. Due to the dry or semi-dry friction surface, the moving parts friction and heat. Second, liquid friction heat. High-pressure oil leaks into the low pressure chamber through various gaps, and a great deal of hydraulic pressure can be lost to heat energy. Therefore, the correct choice of moving parts between the gap, the tank volume and cooler, can prevent excessive pump heat and oil temperature is too high. In addition, back to the oil filter blockage caused by back pressure too high, will cause the oil temperature is too high and the pump overheating. Rexroth variable piston pump on the common fault analysis, Longli mainly analyzes the oil leakage, vibration and noise, overheating and other three cases, the user in the course of the use if you encounter these problems, you can refer to the above approach. Of course, the problems are endless, and when we meet, we must analyze specific problems in an attempt to find the best solution.