Usage of gear oil pump
Usage of gear oil pump
1）Gear pump is not suitable for empty operation, when using, the pump is stopped after pumping, otherwise it will accelerate the wear of impeller seal bearing and so on.It is also possible to wear the pump pipe, because the pump motor no-load speed up to 10000 RPM.Gear oil pump timely replacement brush, brush wear will not be able to use, must be timely replacement (2 brush replacement at the same time) otherwise it will make the brush and commutator contact bad cause damage, damage commutator, serious will burn out the armature.
2）Gear oil pump shall not be used under the following circumstances. In the process of use, if the insulation damage is found, the sheath of the power cord is broken, the plug socket is cracked or in bad contact, the intermittent operation, the spark and other faults occur, the motor shell shall be repaired immediately when operating.Not to be used until repaired.Gear oil pump to prevent overload, when in use, in case of abnormal speed or decrease, should immediately stop to check whether there is debris stuck impeller or motor fault, the pump must immediately cut off the power supply when braking.
3）Gear oil pump to use tools to cherish, all pumps must be carefully to avoid impact.Gear pump is used to work with two gear rotation, the medium requirements are not high.The general pressure is below 6MPa and the flow rate is large.Gear pump in the pump body is equipped with a pair of rotary gears, an active, a passive, depending on the two gears meshing each other, the pump in the whole working chamber into two separate parts.A is the suction cavity and B is the discharge cavity.
What are the factors that affect the working liquid quality of gear oil pump?
(1) impurities.Impurities include dust, scum, burr, rust, patent leather, welding slag, flocculent, etc.Impurities can not only wear each moving parts, and once stuck in the spvalve or other moving pairs, will affect the normal operation of the whole system, resulting in machine failure, accelerating component wear, system performance degradation, noise.
(2) water.If the moisture in the oil exceeds the standard, it will not only damage the bearing, but also make the steel surface rust, and then make the hydraulic oil emulsification, deterioration and precipitation, impeding the heat conduction of cooler, affecting the valve work, reducing the effective working area of the filter, increasing the abrasion effect of oil.
(3) air.If there is gas in the hydraulic oil line, when the bubble overflow, it will impact the tube wall and components to form cavitation, so that the system can not work normally, a little longer will lead to component damage.
(4)Oxidized products.The working temperature of general mechanical hydraulic oil is 30 ~ 80℃, the life of hydraulic oil is closely related to its working temperature.When the working oil temperature exceeds 60℃, the service life of the oil will be halved for every 8℃ increase, that is, the service life of the oil at 90℃ is about IO% of the oil at 60℃, because the oil is oxidized.Oxygen and oil hydrocarbons in reaction, make the oil oxidation, color black, viscosity rise slowly, and then could be seriously to oxide can't dissolve in oil, with brown mucous layer deposition somewhere in the system, easy to plug components of the control oil duct, make the ball bearing, valve core, such as hydraulic pump piston wear, affect normal operation of system.Oxidation will also produce corrosive acid, and the oxidation process starts slowly. When a certain stage is reached, the oxidation speed will suddenly accelerate, and the viscosity will suddenly rise, resulting in higher temperature of working oil, rapid oxidation process, accumulated precipitation and acid content will be more, and then make the oil can no longer be used.
(5）Reactants.Physicochemical reactants may cause changes in the chemical properties of oil products.Solvents and surface active compounds can corrode the genus and degrade the oil.