Repair and maintenance of hydraulic system, maintenance and maintenance of hydraulic equipment

Mechanical hydraulics in a general operating environment.

Maintenance Method:

One. Prevents air and water from entering the hydraulic system.

1) Prevent air from invading the hydraulic system.

Hydraulic oil at room pressure and temperature.

It contains air with a volume ratio of 6 8%, and when the pressure is reduced, the air will be free from the oil, and the bubble bursting makes the hydraulic components "cavitation, producing noise. A large amount of air entering the oil will aggravate the phenomenon of "cavitation", increase the compressibility of hydraulic oil, work unstable, and reduce work efficiency.

The actuator has undesirable consequences such as "crawling" in its work. In addition, the air will oxidize the hydraulic oil, accelerating the deterioration of the oil. To prevent air intrusion, attention should be paid to the following:

The suction nozzle of the hydraulic oil pump shall not expose the oil surface, and the suction pipeline must be well sealed.

After maintenance and oil change, the air in the system should be removed according to the regulations before normal operation.

The seal of the drive shaft of the oil pump should be good, and attention should be paid to replacing the oil seal there.

The "double lip" oil seal should be used, and the "single lip" oil seal cannot be replaced, because the "single lip" oil seal can only seal the oil in one direction and does not have the function of sealing the gas. A certain unit used to have a loader.

After the overhaul, the hydraulic oil pump has continuous "cavitation" noise, the oil tank oil level automatically rises and other faults, after inquiring about the hydraulic oil pump repair process, it is found that the oil seal of the hydraulic oil pump drive shaft is caused by the misuse of the "single lip" oil seal.

2) Prevent water from invading the hydraulic system.

Excessive water content in the oil will cause corrosion of hydraulic components, emulsification and deterioration of oil, reduce the strength of the lubricating oil film, and accelerate mechanical wear.

Two. Choose the right hydraulic oil, hydraulic oil plays a role in the hydraulic system to transmit pressure, lubrication, cooling, sealing, improper selection of hydraulic oil is the main reason for the early failure and durability of the hydraulic system. Hydraulic oil should be selected according to the brand specified in the random "Instruction Manual", and when the substitute oil needs to be used under special circumstances, its performance should be the same as that of the original grade.

Different grades of hydraulic oil should not be mixed to prevent chemical reactions.

Performance changes. Dark brown, milky white, and odorous hydraulic fluids are spoiled oils and should not be used.

Three. Preventing solid impurities from mixing into the hydraulic systemClean hydraulic oil is the life of the hydraulic system. There are many precision couples in the hydraulic system, some have damping holes, some have gaps, etc.

If solid impurities invade, it will cause strain of precision parts, hairpins, oil duct blockage, etc., which will endanger the safe operation of the hydraulic system. Generally, the ways for solid impurities to invade the hydraulic system are: unclean hydraulic oil; The refueling tools are unclean; carelessness in refueling, repair, and maintenance; Desquamation of hydraulic components, etc.

Hello dear, the common faults of the hydraulic system in use include the following:1Hydraulic oil temperature is too high:

High hydraulic oil temperature may cause damage to the hydraulic system, such as seal aging, oil oxidation, etc. The solution is to check the oil temperature sensor, clean the radiator, change the hydraulic oil, etc. 2.

Abnormal sound of the hydraulic pump: The abnormal noise of the hydraulic pump may cause the hydraulic system to lose its normal working effect. The solution is to check the inlet and outlet pressure of the hydraulic pump, clean the filter, and carry out necessary repairs and replacements.

3.Unstable pressure: The unstable pressure of the hydraulic tie system may cause the hydraulic cylinder to work abnormally, such as unstable speed, shock, etc.

The solution is to inspect the pressure sensors, control valves, regulators, etc., and make the necessary repairs and replacements. 4.Hydraulic cylinder leakage:

Oil leakage from hydraulic cylinders may cause the hydraulic system to lose its normal working effect, such as not being able to reach the intended position, unable to maintain pressure, etc. The solution is to check the hydraulic cylinder seals, hydraulic line connections, etc., and replace them as necessary. 5.

Control valve failure: Control valve failure may cause the hydraulic system to not work properly, such as the inability to adjust the pressure, flow, etc. The solution is to check the control valve solenoid, valve core, secret draft trapped imitation seal ring key fiber, etc., and carry out necessary repairs and replacements.

Hello, the hydraulic system Qiao Peiling is a very important construction machinery transmission system, which needs to be maintained and maintained frequently to ensure its normal operation and prolong its service life. Here are eight ways to maintain your hydraulic system:1

Replace the hydraulic oil regularly: The hydraulic oil is the core component of the hydraulic system, which should be replaced according to the specified time cycle, and the oil quality and oil quantity should be checked regularly. 2.

Cleaning the oil pipeline: clean the oil circuit of the hydraulic system from time to time to prevent impurities such as oil pollution, ash sensitive and dusty dust from entering the sail of the hydraulic system and damaging the seals and valves. 3.

Replace the filter element: The filter element is an important part of preventing oil from entering the hydraulic system. Regular replacement of the filter element can effectively ensure the normal operation of the hydraulic system.

4.Detect the hydraulic pump: Regularly check whether the hydraulic pump is operating normally, if there is abnormal sound or leakage, it needs to be repaired or replaced in time.

5.Inspect the seals: The seals in the hydraulic system are essential for the operation of the system, check whether the seals are loose or aging, and replace them in time if there is a problem.

7.Prevent overloading: Once the hydraulic system is overloaded, it will be damaged, which may cause the machine to be unusable.

Regularly check if the machine is overloaded to avoid this kind of problem. 8.Learn about maintenance:

Hello, dear, I am happy to answer for you: The repair steps for hydraulic transmission system failure are as follows:1

Abnormal speed of hydraulic transmission system: due to abnormal speed, it is necessary to adjust the variable structures such as throttle valve, relief valve, variable pump, and speed control valve one by one, and then correspond to their speed range values, and compare and analyze this speed range value with the technical reference value; Solution: Adjust the variable structure such as throttle valve, relief valve, variable pump, speed regulating valve and so on one by one; 2.

Abnormal movement of the hydraulic transmission system: If the failure occurs due to abnormal movement, it is necessary to observe the movement status of the actuator of the relevant system, judge whether it is normal according to its movement state, find out the reversing valve with abnormal operation, and then check the stroke control to find out the abnormality in the hydraulic transmission system; Solution: Observe the action status of the actuator of the relevant system, check the stroke control, and find out the abnormalities of the hydraulic transmission system; 3.

Abnormal pressure of hydraulic transmission system: To judge whether the fault occurs due to abnormal pressure, it is necessary to use a pressure gauge to measure the pressure value of the pressure measuring point reserved on the system pipeline, and analyze the difference between the measured value and the standard value, so as to determine the fault location of the abnormal pressure of the hydraulic transmission system; Solution: Check the pressure of the hydraulic transmission system and adjust it in time; 4. Ignition coil, spark plug damage or carbon deposition will also lead to transmission system failure.

At this time, the spark plug should be replaced in time. Faults caused by damage or dirtiness of the vacuum pressure solenoid valve can be removed. Workaround:

Clean up the spark plug in a timely manner, or replace it with a new one.