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Common Failures of Hydraulic Gear Pumps
If you find that the gear pump does not come to oil in the host commissioning, first check whether the rotation direction of the gear pump is correct. Gear pumps have left, right rotation points, if the direction of rotation is not correct, its internal gear meshing volume difference formed by the pressure oil will make the oil seal is broken and oil leakage. Secondly,
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31
2023/08
Duplex gear oil pumps for forklift applications
Gear pumps are rotary pumps that convey liquids or pressurize them based on the change and movement of the working volume formed between the pump cylinder and meshing gears. By two gears, pump body and front and rear cover composed of two closed space, when the gears rotate, the volume of the space on the side of the gear disengagement from small to large after the formation of a vacuum, the liquid will be sucked in, the volume of the space on the side of the gear mesh from large to small, and the liquid will be squeezed into the pipeline to go, suction chamber and discharge chamber is dependent on the meshing line of the two gears to be separated, the discharge pressure of the gear pump depends on the size of the resistance at the outlet of the pump. The discharge pressure of the gear pump all depends on the size of the resistance at the outlet of the pump.
09
2020/01
Research on the selection of gear oil pump bearings for forklift trucks
At present, forklift gear oil pump widely used needle roller bearings have many advantages: high bearing capacity; friction factor is small, start and work with less friction, mechanical efficiency is quite high; can be applied to both high and low speed; can be applied to a wide range of temperatures; anti-oil contamination ability is very strong.
07
Hydraulic gear oil pump trapped oil noise and noise reduction strategy
In recent years, mute has been an important technical indicator of hydraulic gear oil pumps, however, because the gear oil pump flow and pressure pulsation is its inherent characteristics, the reasons for the noise is more complex, only from the theoretical analysis is often difficult to find the reasons for the noise, must be produced for the different circumstances of the noise, to take different methods and measures in order to reduce the noise in order to be useful.
06
Duplex Gear Pumps in Coal Mining Machine Elevation Systems
Coal mining machine heightening system is generally hydraulic heightening, hydraulic system has a single pump and duplex gear pumps, the oil system can be simplified for the main oil, control oil, brake oil, a total of the main oil to control the two hydraulic cylinders to lift the rocker arm, the required flow rate is larger, the required oil pressure is slightly less than the high-pressure relief valve oil pressure. Control oil circuit only control the action of the hand-hydraulic reversing network, the required flow is less, brake oil circuit with oil compression brake pads to achieve braking efficiency, the same required flow is small, the oil circuit required oil pressure of about 2MPa. This paper compares the hydraulic system.
05
Ideas and practical use of hydraulic gear oil pump design
Taking into account the actual working conditions of hydraulic gear oil pumps, the design of the floating combined sleeve should be able to reduce the radial force of the gear pump, reduce noise, provide axial compensation. Specific design ideas are as follows:
04
Triplex gear oil pump application attention to technical problems
The disassembly and decomposition of the triplex gear oil pump should be carried out in a clean place, after the removed fittings are cleaned with gasoline or diesel fuel, the wear state of each fitting is carefully checked to make sure that it can be continued to be used, and then the fittings that can be continued to be used are carefully put away in order.
08
2019/06
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