A set of hydraulic system in the process of using, only for the correct maintenance and maintenance, in order to give full play to the performance of various hydraulic components, prolong the service life and make the system is always in the best working state, to meet the production process requirement, maintain the continuity of production. Therefore, the correct maintenance and maintenance of hydraulic system is necessary to reduce the failure rate of hydraulic system and ensure the normal operation of hydraulic system.

Hydraulic working medium

Pollution control

According to statistics, more than 80% of the faults in the hydraulic system are caused by the pollution of the hydraulic medium. The oil pollution can lead to hydraulic valve core card dead, damping hole jam, increase the wear and tear of components, etc., so as to reduce the service life of the hydraulic element, make the system fault occurred frequently, therefore, the purity of the oil is crucial for the life of the hydraulic system. How can you guarantee the cleanliness of hydraulic fluid?

(1) the newly installed hydraulic system must make acid cleaning and cleaning of all hydraulic piping in the system before being put into use, and eliminate the contamination of the oil in the process of manufacture and installation.

(2) into the hydraulic fluid in the tank, you should use the special oil filter will tank of the new injection fuel tank, and pay attention to the pipelines should be inserted into the barrel and the tank cleaning, prevent for piping is not clean the impurities with one tank. In addition, the filter paper used for the filter should be replaced after 2 to 3 times.

(3) regularly check, clean or replace the filter element and clean up the tank according to the specific situation used by the system. The new hydraulic system should be cleaned more in the early stages of production. The general fuel tank should be cleaned once every 2 months. The filter and filter should be cleaned once a month. This will persist for about half a year, and the cleaning of oil liquid can be extended to the tank for half a year. The filter should be cleaned once every 3 months and the oil can be kept clean. Temperature control in the process of using water - glycol hydraulic fluid, oil temperature control is also a reasonable -- glycol flame resistant liquid generally by about 20% 20% of the base fluid, 35% 55% of the water, liquid phase anti-rust agent, anti-wear agent, defoamer, etc. If the oil temperature is longer than the key link. As is known to all, a 10% to 15% of the water increases the adherend and 60 c under the working state of gas, as with the evaporation of moisture in the oil, the liquid viscosity increase, increases until a wear, diao and residual liquid can burn. Since the oil tank used in our hydraulic system is closed tank, the oil temperature is generally controlled between 30 and 45C. If it is found that the oil temperature is high, on the one hand, the oil sampling inspection, check the changes of viscosity of liquid and the loss of moisture, and according to the inspection report to add a moderate amount of distilled water or deionized water tank, to restore the use of water - glycol hydraulic performance; On the other hand, the maintenance personnel should be organized to check the cooling system and other components that may generate heat, and timely find out the reasons for the high temperature rise and exclude them.

Routine work

The daily maintenance and maintenance of hydraulic system can be summed up in four words: listening, reading, touching and checking.

Listen: listen to whether the vane pump is abnormal, whether there is a high frequency whistle, whether the hydraulic valve is "bared,".

Look: to observe whether the indicators of pressure gauges and liquid level meters are within the prescribed limits; Look at the valve block and the sealing of the hydraulic pump and oil cylinder, whether there is a leakage phenomenon, whether the pipe joint is loose and leaking; Whether the skin of each hydraulic hose is worn or broken; Observe whether the working medium is spoiled or contaminated. It is also important to observe whether the hydraulic cylinder is normal.

Touch: touch tank and piping hot, whether pump heat, vibration or shock in the pipeline, and by touching the hydraulic cylinder in and out of the tubing, whether can preliminary judgment, the hydraulic cylinder oil.

 

The above: The pressure relay customization scheme