The normal operation of the agricultural machinery hydraulic system is the mechanical guarantee of reliable operation, qualified hydraulic oil hydraulic system is the basic condition of reliable operation, therefore, agricultural machinery hydraulic system is very important for the maintenance, about hydraulic system maintenance tips are as follows:
1. Prevent solid impurities from mixing into hydraulic systems
In the hydraulic system, there are a lot of precision even parts. If the solid impurity invades the damping holes or the cracks in the parts, it will cause the precision coupling strain and the oil channel blockage, which will endanger the safe operation of the hydraulic system.The reason that the solid impurities invade the hydraulic system is because the hydraulic fluid is impure;The tools are not clean.Refueling and maintenance;Hydraulic element debits and so on.The solid impurity intrusion system can be prevented from the following three aspects:
1. When refueling
Hydraulic oil must be filtered and refueling should be kept clean.You can't remove the filter from the fuel tank to improve the speed of the fuel.Refueling personnel should use clean gloves and overalls to prevent solid impurities and fiber impurities from falling into the oil.
2. When cleaning
The oil must be used with the same hydraulic oil as the system used, with oil temperature between 45 and 80 degrees Celsius, with large flow as much as possible to remove impurities from the system.The hydraulic system should be cleaned more than three times, each time after cleaning, when the oil is hot, the whole system will be released.Clean the filter after cleaning, replace the new filter and add new oil.
3. Maintain the
Remove the hydraulic tank of fuel cap, filter cover, test hole, hydraulic tubing parts, pay attention to the system oil when exposed to avoid dust, remove the parts need to thoroughly clean before they can open.Such as removing the hydraulic tank of fuel cap, the soil around the need to remove the cap, unscrew the cap, remove residual impurities in the joint area (not rinse in order to avoid water seeping into the tank), confirmed after cleaning to open the cap.When wiping material and hammer, be careful to choose not to remove the fiber impurities of the wiping material and the use of a special hammer with rubber.Hydraulic components, hydraulic hose should be cleaned carefully, with high pressure wind blow dry and assembly.Choose a well-packed genuine filter element (internal packing is damaged, although the filter element is in good condition, it may not be clean).Clean the filter at the same time when changing the oil and apply the wiping material before installing the filter to carefully clean the bottom of the filter shell.
2. Prevent water and air from entering the hydraulic system
1. Prevent water from entering hydraulic system
The oil contains excessive moisture, can make hydraulic component rust, oil emulsion metamorphism, lubricants film intensity reduces, accelerate mechanical wear.
2. Prevent air from entering the hydraulic system
Under normal temperature and pressure, the hydraulic oil has a volume ratio of 6 to 8 percent. When the pressure drops, the air will flow out of the oil, and the air bubbles will "cavorate" the hydraulic components and generate the noise.The large amount of air into the oil will cause the "cavitation" phenomenon to increase, the compressibility of the hydraulic fluid increases, the work is unstable, the work efficiency is reduced, and the performance of the components is "crawling" and other negative consequences.In addition, the air will oxidize the hydraulic oil and accelerate the deterioration of the oil.The following points should be noted for preventing air invasion:
(1) after maintenance and oil change, the air in the system should be eliminated in order to operate normally.
(2) the suction tubing of the hydraulic oil pump shall not be exposed to the oil surface, and the oil suction line shall be sealed well.
(3) keep the pump drive shaft seal is good, should pay attention to change it "lips" authenticity should be used when the oil seal oil seal, cannot replace with "single lip seal", because "single lip seal only one-way seal oil, do not have the function of sealing gas.
3. Choose the right hydraulic oil
Hydraulic oil is used in hydraulic system to transfer pressure, lubrication, cooling and sealing, and the selection of hydraulic oil is the main reason for the early failure and durability of hydraulic system.The hydraulic oil should be selected according to the number specified in the instruction manual. In case of special situation, the performance should be the same as that of the original brand.The hydraulic oil of different brand number can not be mixed to use, in case the hydraulic oil produces chemical reaction, the property changes.Dark brown, milky white, smelly hydraulic oil is bad oil, must not be used.
1. Prevent solid impurities from mixing into hydraulic systems
In the hydraulic system, there are a lot of precision even parts. If the solid impurity invades the damping holes or the cracks in the parts, it will cause the precision coupling strain and the oil channel blockage, which will endanger the safe operation of the hydraulic system.The reason that the solid impurities invade the hydraulic system is because the hydraulic fluid is impure;The tools are not clean.Refueling and maintenance;Hydraulic element debits and so on.The solid impurity intrusion system can be prevented from the following three aspects:
1. When refueling
Hydraulic oil must be filtered and refueling should be kept clean.You can't remove the filter from the fuel tank to improve the speed of the fuel.Refueling personnel should use clean gloves and overalls to prevent solid impurities and fiber impurities from falling into the oil.
2. When cleaning
The oil must be used with the same hydraulic oil as the system used, with oil temperature between 45 and 80 degrees Celsius, with large flow as much as possible to remove impurities from the system.The hydraulic system should be cleaned more than three times, each time after cleaning, when the oil is hot, the whole system will be released.Clean the filter after cleaning, replace the new filter and add new oil.
3. Maintain the
Remove the hydraulic tank of fuel cap, filter cover, test hole, hydraulic tubing parts, pay attention to the system oil when exposed to avoid dust, remove the parts need to thoroughly clean before they can open.Such as removing the hydraulic tank of fuel cap, the soil around the need to remove the cap, unscrew the cap, remove residual impurities in the joint area (not rinse in order to avoid water seeping into the tank), confirmed after cleaning to open the cap.When wiping material and hammer, be careful to choose not to remove the fiber impurities of the wiping material and the use of a special hammer with rubber.Hydraulic components, hydraulic hose should be cleaned carefully, with high pressure wind blow dry and assembly.Choose a well-packed genuine filter element (internal packing is damaged, although the filter element is in good condition, it may not be clean).Clean the filter at the same time when changing the oil and apply the wiping material before installing the filter to carefully clean the bottom of the filter shell.
2. Prevent water and air from entering the hydraulic system
1. Prevent water from entering hydraulic system
The oil contains excessive moisture, can make hydraulic component rust, oil emulsion metamorphism, lubricants film intensity reduces, accelerate mechanical wear.
2. Prevent air from entering the hydraulic system
Under normal temperature and pressure, the hydraulic oil has a volume ratio of 6 to 8 percent. When the pressure drops, the air will flow out of the oil, and the air bubbles will "cavorate" the hydraulic components and generate the noise.The large amount of air into the oil will cause the "cavitation" phenomenon to increase, the compressibility of the hydraulic fluid increases, the work is unstable, the work efficiency is reduced, and the performance of the components is "crawling" and other negative consequences.In addition, the air will oxidize the hydraulic oil and accelerate the deterioration of the oil.The following points should be noted for preventing air invasion:
(1) after maintenance and oil change, the air in the system should be eliminated in order to operate normally.
(2) the suction tubing of the hydraulic oil pump shall not be exposed to the oil surface, and the oil suction line shall be sealed well.
(3) keep the pump drive shaft seal is good, should pay attention to change it "lips" authenticity should be used when the oil seal oil seal, cannot replace with "single lip seal", because "single lip seal only one-way seal oil, do not have the function of sealing gas.
3. Choose the right hydraulic oil
Hydraulic oil is used in hydraulic system to transfer pressure, lubrication, cooling and sealing, and the selection of hydraulic oil is the main reason for the early failure and durability of hydraulic system.The hydraulic oil should be selected according to the number specified in the instruction manual. In case of special situation, the performance should be the same as that of the original brand.The hydraulic oil of different brand number can not be mixed to use, in case the hydraulic oil produces chemical reaction, the property changes.Dark brown, milky white, smelly hydraulic oil is bad oil, must not be used.