Installation,operation and Maintenance for oil pump
Working medium
1.To prevent debris mixed into the medium
Hydraulic fluid contamination will cause vane pump failure and reduce its lifetime. Effective pollution control of hydraulic fluid shall be taken to keep the pollution level within class NAS10, which can be evaluated roughly with 25u filter mesh. Meanwhile, an immersion filter with the specification of 150u, whose rated flow shall be not less than twice of the one of pump, shall be installed on the suction port of the pump with the distance more than 50mm from the bottom of the tank.
2.Hydraulic fluid type
These series vane pumps adapt to a variety of hydraulic fluids, including mineral oil (petroleum series hydraulic fluid), water-based hydraulic fluid, synthetic hydraulic fluid, etc. Adopting different kind of hydraulic fluid, the rated pressure and maximum rotation speed of oil pump will be different as shown in the technical parameters sheet. The anti-wear hydraulic oil, such as the type of ISOVG32 or ISOVG46, is recommended for the purpose to improve the performance of oil pump and extend its service life. The optimal oil viscosity should be 30cst, when the temperature ranges 10~60 with the optimal range of 35~50 .
Installation
1.The supporting of oil pump shall be firmly fixed with strong rigidity, and shall absorb vibration fully.
2.The shaft concentricity between pump and motor should be controlled within 0.1mm. Maximum angle deviation shall be less than 0.2° . Adopt flexible couplings as much as possible to avoid any stress causing by bending or lateral force.
3.The nominal diameter of pump suction pipe shall be not less than the nominal diameter of pump inlet port. The flow of suction filter shall be not less than twice of the flow of oilpump.
4.In the case when the pump is installed higher than the fluid level of fuel tank, the height of suction inlet port shall be less than 0.5m from the fluid level. It will be better to make the suction port lower than the tank fluid level and the positive pressure of suction greater than 0.03Mpa.
5.In the case when the pump operating rotation speed <1200r/min, the inlet port of pump shall be mounted upwards for easy suction of oil during start up. If the ambient temperature is low, it is recommended to adopt anti-wear hydraulic oil of VG32 type.
6.Note that the flanges, the connectors and the suction pipelines around the inlet port must be hermetically sealed with no air leakage.The air leakage will cause noise and vibration of system, and will generate a large number of bubbles within the fuel tank, which will reduce the service lifetime of the pump.
7.The fuel tank should set a clapboard to separate the bubbles as well as dirty debris from returning fluids. The returning pipe shall be immersed under the fluid level, which is forbidden to directly connecting to the pump inlet port, to prevent producing bubbles by returning air and fluid.
Start up
1.Check the inlet and outlet ports before start up the oil pump. Make sure that the rotation direction of pump is consistent with the direction of indicator.
2.Before first time start up, please fill the pump fully with hydraulic oil, and rotate the coupling by hand with evenly strength until flexible.
3.There will be possible difficulty in oil absorption of pump during the first time start up or re-start up after long-time stop. Considering this respect, the outlet port of the pump shall loose its connecting fittings or install discharge valve for the purpose of discharging the air in advance. Also, it is recommended to start up pump in jog mode with no load as much as possible.
Maintenance
1.The remaining scrap iron and especially fabric residues in the fuel tank and pipelines after user piping, which will cause failure of pump, must be cleaned up.
2.The relief pressure of safety valve shall not be too high, but usually 1.1 times of rated pressure of the pump.
3.Keep the temperature of oil around 10~60 with optimal range of 35~50 . Pay particular attention to avoid continuous overheating operation, which will reduce pump service lifetime greatly. If necessary, heater or cooler should be set to adjust the temperature of hydraulic fluid.
4.Keep the fluid level high enough regularly. After start up, the hydraulic fluid will run through into the pipeline and cylinder, if which space is quite large enough, then the filter will expose out of the declining fluid level, although the amount offluid is enough at first. So it is necessary to charge fluid again. An oil level indicator should be set in fuel tank for regular observation and oil recharge, as there also will be possible leakage in operation.
5.Check the performance of hydraulic fluid regularly. Replace promptly those hydraulic fluid failed to meet the requirements, and clean the fuel tank.
6.The filter should be cleaned regularly to ensure smoothly suction of hydraulic fluid.
7.Check and tight regularly the mounting bolts and flange bolts, as which will loose because of vibration after operation for a period of time.
8.In the case to adjust the direction of oil port, the concerning bolts that is to connect pump casings should be screwed out first, and make sure there is seamless between front pump and back pump when rotating the back pump with strength to make the pump core and back pump move together to target position. Finally, screw and tight the bolts back diagonally and gradually.
9.As the internal parts of this series vane pump adopt composite modular structure, so the replacement of pump core will meet the requirement for ordinary maintenance purpose. Note that the sealing ring should be smoothly flattened with no edge cutting. Screw and tight the bolts to connect pump casings with evenly force diagonally and gradually
