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Aggisl xjet
Vickers Vane Pump - The Cause Of The Failure Of The Vane Pump
According to the Vickers Vane Pump , the failure of the vane pump is generally reflected in the problems of high noise, pressure swing, system pressure drop, no pressure, and high system oil temperature.
1. No pressure means: when the vane pump is working, there is no pressure in the system. First, check whether the vane pump is discharged from the hydraulic oil. If not, check if the working direction of the pump is correct. The coupling between the motor and the vane pump is connected. Is it normal, the shaft positioning screw is tightened and works, and the blade is not working properly because the viscosity of the hydraulic oil is too high; if the hydraulic oil comes out, it proves that the pump is basically no problem, the problem should be serious leakage of the control valve, total The pressure valve (relief valve) has failed.
2. The reason why the system oil temperature is too high: it should be that the system's pipeline is too small, the pressure is too high, the cooling system does not meet the requirements, and the vane pump is trapped in oil, which is reflected in the pump body and system oil temperature is too high, according to the actual situation. Increase the system piping, or reduce the pump displacement (replace the small displacement pump core), adjust the cooling system to increase the cooling effect.
3. Pressure swing: It means that the pressure of the system is unstable when the vane pump is working. As long as the pump has no abnormal noise, it should be the problem of the total pressure valve (relieving valve). The spool of the total pressure valve should be checked. Whether it is worn or not, whether the damping is blocked by foreign matter; if the pressure is oscillated due to the wear of the pump core components, the oil pump will have abnormal noise when working.
4, system pressure: refers to the blade pump can reach the predetermined pressure when working, the pressure will gradually drop, resulting in the system can not work properly. If this phenomenon occurs in the pump just installed, it should be caused by leakage of the control valve of the system or excessive oil temperature. If the above problem occurs after using for a period of time, it is necessary to check whether the upper and lower oil distribution plates are worn (very flat). Wear) If the oil gap between the upper and lower oil distribution plates is too large and the oil temperature is too high (the mucous membranes are not self-sealing), the leakage of the control valve will cause the system to lose pressure.
5, poor oil absorption: a common fault of the vane pump is that the curved surface of the stator wears into a slab-like rib, which is mainly caused by poor oil absorption. The reason is: when the oil pump is insufficiently sucked, the pressure will be high and low, and the effective contact between the top of the blade and the inner curved surface of the stator will intermittently disengage and contact with the change of pressure, and the frequent hard impact will make the oil absorption area of the stator. There was a plaque like a plaque. There are several cases of poor oil absorption: the oil is too sticky (the grade is too large), the filter is clogged, the suction line is too thin, the oil level is too low (the oil is not enough).
6. Oil leakage: In the process of newly installed oil pump, gas leakage at the suction port is also a common disease. Its performance is: the noise is too large, the screaming, squeaking, the higher the pressure, the more obvious, the long working oil tank The oil in it will bubble. The main cause of air leakage is that the oil pump inlet flange and the sealing of the pipeline are not good.
If you want a vane pump to work hard for you, maintenance and proper use are essential. If you don't know how to use and protect it, you will only add your own cost. On the contrary, if you work hard, you can also Make your production process less troublesome and more effective.
As professional China V/VQ Vane Pump manufacturers and V/VQ Vane Pump suppliers, Taizhou Eternal Hydraulic Machine Co.,Ltd can supply you with high-quality products and services. Eternal Hydraulic commit ourselves to be Global One-Stop Mall for Hydraulic products In the world, with professional hydraulic solutions and nice Quality & Price products to satisfy with each customer. The company firm believes that " Only The Best Can Satisfied The Best", become the First Purchase Choice of hydraulic components for all customers in the world.
November 26, 2018
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