Hydraulic lifting platform refers to this type of control circuit. When the hydraulic cylinder stops working, pump I charges accumulator 4 through product 2 to store kinetic energy. When the pressure of the accumulator exceeds a certain control accuracy value, the unloading valve 3 opens, causing the pump to throw support, and this product 2 maintains the pressure of the accumulator. When relay 5 is connected to the power supply for speed regulation and connected to the fuel pipe, the pump and accumulator may interrupt the supply of oil to the hydraulic cylinder, which may lead to accidents and cause the piston rod to quickly exercise. The regulating pressure of unloading valve 3 should be higher than the working pressure of the system software.
What are the reasons for the insufficient total flow output of the hydraulic lifting platform pump? People summarize as follows:
1. If the pump does not leak oil or the total output flow rate (enterprise: cubic meters per second) is insufficient, check whether the pump's rotation is incorrect and whether the speed ratio is too low. The motor can be changed to change the pump's rotation. If the speed ratio is too low, it is necessary to replace the motor or accelerator with a high speed ratio.
2. The liquid level in the car's fuel tank is too low. Hydraulic oil should be filled or the inlet pipe should be inserted downwards.
3. The hydraulic lifting platform for high-altitude operations has a high oil temperature, which increases the internal leakage of the pump. You can choose air-cooled or add a cooling tower (cooler) to the car fuel tank.
4. Steam leakage in the oil inlet pipe. The noise and insufficient total flow of the pump are the main manifestations of this common malfunction. We must find the leakage point and repair it in multiple ways
5. If the oil inlet pipeline is blocked, the oil filter will be clogged or there may be sediment in the pipeline. It is necessary to clean or replace the coarse filter, and if necessary, inspect the hydraulic oil sensitivity
6. The residue of gear oil and iron pins from the hydraulic lifting platform enter the pump, causing serious damage to the parts
7. When the gear pump operates under high pressure, it increases the stiffness of the shaft sleeve, resulting in eccentric wear. When the pump operates under normal pressure, the leakage increases significantly. The method of fault detection requires investigating the causes of pressure rise, such as whether the posture of the pressure valve is poor, in order to adopt effective solutions to the problem.
8. When the temperature of the gear oil on the hydraulic lifting platform is high, the viscosity of the oil is greatly reduced, internal leakage is increased, and the output of the heart is reduced. This requires mastering the actual operation and application standards of the server, researching the reasons for the increase in oil temperature, and adopting effective solutions to the problem.
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