the hydraulic system maintenances

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Has many advantages, widely used in a variety of machinery. Use and improper maintenance, there will be a variety of failure, as well as the impact on production. Therefore, the proper use and maintenance to ensure the system to extend the service life, ensuring stable, sensitive, reliable and an impo rtant factor. The following analysis of the failure of the main reasons, and proposed methods of protection.

(1) to prevent pollution of hydraulic oilhydraulic hose and fittings
Contamination of the hydraulic oil is mixed with air, water and cured from the outside world, such as the use of metal powder mixed with rust, broken bar on the destruction of the sealing materials, coatings, etc. Oil pollution, exacerbated by the relative motion between parts wear in hydraulic components, resulting in blockage of the throttle holes or slide valve movement pieces stuck hydraulic components not working properly. According to statistics, more than 75% of hydraulic system failure is due to the actions of oil pollution. Therefore, we must adopt various measures to prevent or reduce oil pollution.

The main method of prevention of oil pollution is:china hydraulic hose
(1) prior to installation on the pipe, castings, etc. will be thoroughly washed, the hydraulic system thoroughly cleaned even after completion of the assembly;
â'¡ a variety of hydraulic components assembly to prohibit the use with fiber fabrics (such as cotton yarn) to clean;
The â'¢ tank to be a reasonable seal, through the atmosphere at the air filter to be set up;
The â'£ seal must be reliable, prohibit the use of oil seal and hose;
The â'¤ reasonable selection of the filter type and installation location. The system should be based on the need to configure the crude, refined oil filter. The oil filter should always check usage and discovered that the damage should be replaced;
The â'¥ regular replacement of oil, generally after more than 10,000 hours of cumulative work, it should be oil. Continue to use the oil will lose lubrication properties, and may be rendered acidic, causing the hydraulic system corrosion of metal parts. Intermittent use, depending on the situation every six months or a year oil change time.

Prevention of air into the hydraulic system
The hydraulic system used in the oil compressibility is very small, under normal circumstances that the oil is incompressible. But the air
Compression is about oil a million times, so even if the system contains a small amount of air, its influence is great.
Air dissolved in the oil at low pressure will escape from the oil bubble, the formation of the hole phenomenon, to a high pressure area in the pressure on oil under the action of these bubbles is quickly crushed, sharp by the compression noise in the system is compressed in the gas suddenly released a lot of heat, causing local overheating and accelerated temperature rise, and damaged hydraulic components and hydraulic oil. The compressibility of air, but also lead to the work of organs from reptiles such as failure, undermining the work of a smooth, sometimes vibration.

Prevention of air into the hydraulic system are:
The â'  suction pipe and the return pipe should be inserted below the oil surface, and to maintain sufficient depth;
â'¡ system should be kept full of fluid, the approach is to install a check valve in the hydraulic pump at the exit back to the oil on the road to set the back pressure valve;
(3) tank oil level should be as large as possible, the suction side and the oil return side to use partition separated in order to achieve the goal of elimination of air bubbles;
â'£ Set the bleed hole in the pipeline and the highest point of the hydraulic cylinder, should be starting to let go of one of the air;
â'¤ should maintain a good seal fittings, especially the suction line, if sealed well, the air will be sucked into the hydraulic system.hydraulic fittings manufacturers

(3) to prevent the oil temperature is too high
Hydraulic system oil temperature within the range of 30 degrees to 80 degrees is better, high oil temperature of the system will produce a series of adverse effects, such as the viscosity decreases, leakage increased, decreased volumetric efficiency, resulting in fluid velocity instability, caused by the different coefficient of thermal expansion gap between the movement rate changes, or even stuck, and so on, make the oil deterioration, seals aging, loss of sealing performance. Temperature rise, a variety of reasons, such as the fuel tank capacity is too small, not enough cooling area, the tank stored oil too little, higher ambient temperatures, the cooler the role of failure; not uninstall loop system, still in the pump to stop working in a high pressure overflow; tubing is too thin is too long, bending too much, pressure loss, component machining accuracy is not high, the relative motion of excessive friction heat and so on.

From a maintenance point of view, we should pay attention to the following quest ions:
(1) to keep the correct oil level in the tank, so that the oil there is enough circulating cooling oil;
(2) keep sufficient water cooler, pipeline flow;
â'¢ In the system does not work, the pump must be unloaded;
â'£ the correct choice of the viscosity of the fluid.

4 daily inspection and periodic inspection of the hydraulic system to strengthen
Some of the major failure of the hydraulic system, often in advance will be some small anomalies through routine maintenance and inspection will be early detection, early prevention, and early troubleshooting.
â'  Before starting the pump check the oil pump before starting to pay attention to the fuel tank is filled with oil, and oil to be added to the fuel tank cap directional signs, measuring the oil temperature with a thermometer, when the oil temperature below 10 degrees, you should make the system with no load condition operating under more than 20 minutes.
â'¡ pump inspection, starting and after starting to use the open method to open the stop-start, repeat several times so that the oil temperature rise, the flexible operation of the hydraulic unit, and then enter the normal operation. Keeping in mind the noise of the pump noise is too large, will have to check the reason for exclusion, to be normal.
(3) system, the working process in check, in the case of system stability, to pay attention to the work of the fuel, oil temperature, pressure, noise, hydraulic cylinders, motors, valve, relief valve, pay attention to the oil spill of the entire system and vibration.
â'£ system has been used for a period of time, such as to produce the phenomenon of abnormal external adjustment method can not be excluded, can be resolved for repair or replacement parts. Complex hydraulic components to decomposition repair to be very careful, the best professional factory repair.