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        Common elevator hydraulic system maintenance methods and measures

        Number of visits: Date:2014年1月23日 08:52

        For mechanized construction companies, engineering machinery technology status is good or not is a direct factor in whether the normal production of enterprises. On hydraulic transmission engineering machinery, the normal operation of the hydraulic system is a major sign of their good technical condition. Qualified hydraulic oil is to protect the reliable operation of the hydraulic system, proper maintenance and reliable operation of the hydraulic system is fundamental. To this end, based on the work I practice on safeguarding the general operating environment engineering machinery hydraulic system for a cursory discussion.
        1 Select the appropriate hydraulic oil
        Hydraulic oil plays a delivery pressure in the hydraulic system, lubrication, cooling and sealing effect, the inappropriate choice of hydraulic oil hydraulic system failure and durability of the early decline. When grade hydraulic oil should be randomly select "Manual" specified in special circumstances need to use on behalf of the oil, it should seek the same performance as the original grade performance. Different brands of hydraulic oil can not be mixed, to prevent hydraulic oil to produce a chemical reaction, the performance changes. Dark brown, white, smelly oil hydraulic oil is bad, you can not use.
        2 to prevent contamination of the hydraulic system of solid
        Clean hydraulic oil hydraulic system life. Hydraulic system has many precision coupling, damping some holes, and some have gaps and so on. If the intrusion of solid impurities precision coupling will cause strain, credit card issuers, oil duct blockage, endangering the safe operation . of the hydraulic system Ways generally solid impurities invade the hydraulic system: hydraulic oil unclean; refueling tools unclean; refueling and repair, maintenance accidentally; scaling and other hydraulic components You can prevent the intrusion of solid impurities in the system from the following aspects. :
        2.1 refueling
        Hydraulic oil must be filtered filling, refueling tools should be reliable clean. Not in order to improve the speed and remove the fuel tank fuel filter at the mouth. Refueling should use clean gloves and coveralls to prevent solids and fibrous impurities fall into the oil.
        2.2 When maintenance
        Removing the hydraulic tank filler cap, filter cover, test holes, hydraulic tubing and other parts, causing the system to avoid dust exposure to oil channel, after the demolition of the site must first be thoroughly cleaned to open. Such as demolition hydraulic tank filler cap, first remove the soil around the tank cover, rear cover screw pine oil, remove the debris left in the joint position (not wash with water to avoid water infiltration tank), confirmed to open the tank lid clean. For use when wiping material and a hammer, you should choose not afford to wipe fiber materials and striking surface impurities attached special rubber hammer. Hydraulic components, hydraulic hose to be carefully cleaned, blown dry with high pressure after assembly. Genuine choice of packaging intact filter (packaging damage, although the filter in good condition, it may unclean). While cleaning the filter oil change, the application materials carefully wipe clean the dirt at the bottom of the filter housing before installing the filter.
        2.3 Cleaning of the hydraulic system
        Cleaning oil must be used with the system used the same grade hydraulic oil, oil temperature between 45 ~ 80 ℃, with a large flow of impurities in the system as far as possible away. Hydraulic system to repeated washing three times or more, after each cleaning, the system will be released in its entirety while oil is hot. Then wash the filter cleaning is completed, after filling the new oil filter replacement.
        3. Prevent air and water intrusion hydraulic systems
        3.1 hydraulic system to prevent air intrusion
        Containing hydraulic fluid under pressure in the temperature volume ratio of 6 to 8% of the air pressure is reduced when the air is free from the oil, the hydraulic components bubble burst "cavitation" noise. A lot of air into the oil will cause " cavitation "phenomenon intensified, hydraulic oil compressibility increased job insecurity, reduced efficiency, implementation of components appear to work" crawling "and other adverse consequences. In addition, the air also makes hydraulic oil oxidation, accelerated deterioration of the oil. Prevent air intrusion should note the following:
        1, according to a random repair and oil change after the "manual" provisions to exclude air from the system to normal operation.
        2, the hydraulic pump suction nozzle shall not expose the oil, the suction line must be sealed well.
        3, the pump shaft seal should be good to note that the department should replace the seals using the "lips" authentic seal, can not use "single lip" seal replaced because "single lip" seal oil seal only one-way, do not have sealing air function. The unit had a major overhaul after Liugong ZL50 loader, hydraulic pump consecutive "cavitation" noise, oil tank automatically elevated failure, hydraulic pump repair process upon inquiry, found that the hydraulic pump drive shaft seal is misused. "single lip "seal due.
        3.2 hydraulic system to prevent water intrusion
        Oil contains excessive moisture, hydraulic components will rust, oil emulsifying deterioration, reduced lubricant film strength, speed mechanical wear. Except when maintenance to prevent moisture intrusion, but also pay attention to storage drums when not to tighten the lid, the most good place upside down; moisture may be several large oil filter, each filter should be replaced once a dry filter paper, in the absence of special detection equipment can be droplets onto a hot iron, do not smoke and steam Now burning can only raise.
        4 Precautions job
        4.1 should be soft smooth mechanical operation
        Avoid rough mechanical work, this would certainly have an impact load, so prone to mechanical failure, greatly shorten life. Impact load generated during operation, while the mechanical structure early wear, fracture, broken, on the one hand to make an impact pressure of the hydraulic system, the pressure will make the shock damage hydraulic components, seals and laminated at high pressure tubing and hose fittings premature failure of spills or burst pipes, frequent relief action oil temperature rise.
        4.2 cargo lifts should be uniform
        Lifts in the job, be sure to pay attention to placement method goods Some lift cargo weight contained within the rated load range, but favor one side or corner of the place when placing goods;. Such as lifts and overloaded truck style, especially aluminum lift ; when placing the goods must be uniform or as placement of the center position.

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