1. The oil and working conditions of the hydraulic complete system: 20 and 30 hydraulic fluids are recommended. The optimum oil temperature is 30 ~ 55 C. It is forbidden to start when the oil temperature is below 15 C or above 60 C. The heater and cooler can be used in advance to adjust the oil temperature.
The hydraulic oil should be replaced once in 1-6 months, and the oil tank should be cleaned to remove dirt and dust.
Hydraulic transmission most avoid oil dirty deterioration, otherwise dust paste sucked on the oil filter, noise intensified, pump life reduced, it is necessary to always keep the oil clean.
2. the external control line and valve introduce control voltage:
External electrical control line is introduced by the electric box, please pay special attention to the direction of motor steering to be consistent with the arrow mark of the pump.
Control voltage of solenoid valve: AC electromagnet is generally 220 V, DC electromagnet is generally 24V, must make control voltage and electromagnet label consistent.
For electromagnetic valves with memory elements, they need to be energized for a short time.
3. Starting of oil pump motor:
Like other machinery, the oil pump motor of hydraulic station requires no-load (unloading) start-up. After a short run, the motor should be loaded. Generally speaking, it is not appropriate to start and close the motor frequently in the working process.
When starting at low temperature, it is necessary to adjust the rated pressure of the relief valve to 1/2, and then repeatedly point the motor to make the relief valve overflow, so as to warm the hydraulic oil, when the temperature rises to about 20 C, and then put it into normal operation. (heating of the heater can be heated directly).
4.general adjustment order:
(1) The hydraulic station will be wiped clean and installed, fixed with angle screws (small hydraulic station can be placed directly on the ground), after cleaning oil injection.
(2) Lay the pipeline according to the hydraulic schematic diagram or hydraulic pipeline diagram, connect the oil outlet and return port of the system with the oil inlet and return port of the main engine, and check the sealing.
Refer to the electrical schematic diagram to introduce the electrical control line, check and receive electricity.
Relax the control handle of all voltage valves (usually counterclockwise rotation), point the motor, check the steering, ensure the correct steering.
Start the motor, for the quantitative pump system to regulate the relief valve, for the variable pump pressure adjustment link to the system pressure, pay attention to eliminate the external pipeline leakage.
Regulate the hydraulic valve flow valve to the prescribed state in turn, manual electromagnetic directional valve, check whether the actuator action is correct.
Use electrical debugging cycle to check whether the main engine is working normally.
Debugging electrical, hydraulic iron to the specified location, to ensure that the travel letter.
Electric debugging cycle, running for half an hour, confirm that no error, strength, speed to meet the requirements, you can put into semi-automatic or automatic cycle normal work.
1. The determination and selection of cylinder diameter, rod diameter and pressure must consider the pressure of the hydraulic system pressure source and the loss of the system. The control and adjustment of the pressure are determined by the hydraulic system adjustment valve.
2. Hydraulic cylinder must use low pressure (greater than starting pressure) for several reciprocating movements before work, alternately open the two ends of the one-way exhaust valve to remove the cylinder gas before normal work. The inlet and outlet connections must be tightly sealed to prevent oil leakage.
3. In order to ensure the service life of the hydraulic cylinder, no impurities or stolen goods should be mixed in the medium in use, so as to avoid scratching the inner wall of the cylinder, causing damage to the sealing parts and causing internal and external leakage.
| Failure phenomenon | Cause of failure | Elimination method |
| Crawling and uneven speed | （1）Air invades. | （1）Remove the air, run several times or add back pressure valve in the return pipe, or open the bleed valve. |
| （2）The seal at both ends is too tight or too loose and leaks. | （2）Replace the qualified seal to ensure that the piston rod can pull without leakage. | |
| （3）The piston rod and the piston are not concentric. | （3）Correct the concentricity of piston rod and piston, and the error is within the range of 0.04mm. | |
| （4）The piston rod is full or partly bent. | （4）The length of the piston rod is corrected by 0.3/100mm or the piston rod is replaced. | |
| （5）The location of the hydraulic cylinder is offset. | （5）The installation must be checked in parallel with the running direction of the main engine. | |
| （6）The inner diameter of the cylinder is not straight. | （6）Trim the inner bore and match the piston with the gap. | |
| （7）The cylinder is corroded and rusted. | （7）Remove rust and burr, and replace cylinders seriously. | |
| Slow action | （1）The bottom of the two sealing grooves on the piston is small in diameter, and the sealing clearance is too large. | （1）It is easy to cause high and low pressure interchange between the two ends of the piston when running at low speed. |
| （2）Too much leakage can't create pressure. | （2） Replace sealing ring. | |
| （3）Because of the bending of the piston rod, the resistance is increased. | （3）Correct the flatness of the piston rod and the concentricity of the piston or replace the piston rod. | |
| （4）Seal ring wear. | （4）Replace sealing ring. | |
| （5）The supporting ring is too tight to increase the friction force. | （5）Trim the outer ring of the support ring and connect it to the H9/f9 clearance. | |
| （6）The cylinder has partial waist shape to cause the two ends to be interconnected with each other. | （6）Boring holes, single piston, or cylinder replacement. |
