Solution of hydraulic system of removing leakage measures

 1, a reasonable choice of the sealing ring and the sealing groove size

To achieve reasonable choice of sealing device, must be familiar with a variety of sealing device in the form of features, and sealing material properties and sealing device for the conditions of use, such as working pressure, working environment temperature, the velocity of moving part. The actual conditions of use and the seal allows the use of a condition to undertake comparative, must ensure the sealing device has good sealing performance and long service life.

Sealing material with hydraulic oil compatibility, its hardness to the right. Rubber hardness according to the working pressure of system level selection. System pressure is high select material hardness of the seals, high pressure, also need to design the supporting ring.

In order to make reliable sealing, long service life, in the design of the sealing groove, with the appropriate compression ratio and the amount of stretching, compression rate is not too big nor too small. Excessive compression stress increases, the friction force is increased, accelerate seal wear, but also easy to generate destructive, shortened life expectancy, sometimes resulting in difficult assembly; too small, poor sealing performance, leakage.

The 0 seal ring with the advantages of simple structure, easy installation, good sealing performance and reliable work, static sealing almost no leakage current, so it is widely used in the seal. The amount of stretching is within the circle and outer circle of the seal of the 0 ring, from increase lifespan considerations, design should avoid sealing coil diameter central line is drawn, therefore the sealing ring as far as possible should be selected according to GB, and the sealing tank should also be in accordance with the relevant standards for the design. In no circumstances do not design their own, but to strictly control the size tolerance, roughness shall comply with the requirement, because the sealing groove width is too large or too deep will cause compression caused by lack of leakage.

 2, parts and pipeline structure design should be reasonable

Parts design to guide angle, so as not to damage the seal assembly. In the sharp edges and grooves of the parts assembly when the sealing ring, to use the protective sleeve, so as not to damage the seal.

Set the hydraulic pipeline should make the fuel tank to the actuator between distances as short as possible, pipeline elbow, especially 90 degree elbow to as little as possible, to reduce the pressure loss and friction.

The hydraulic system should minimize the pipe joint, 30% ~ 40% system oil is composed of a pipe joint leakage.

3, to control the oil temperature of hydraulic system

The oil temperature too high, the lubrication oil film thinning, enlarge the friction force, increased wear, sealing material aging increases quickly, make hard and brittle, and may soon lead to leakage.

Hydraulic control system of temperature, generally from the tank design and hydraulic tubing set aspects. In order to improvement in fuel tank cooling effect, can increase the radiating surface of fuel tank, the tank inside the oil and the oil return with a clapboard. Oil temperature of hydraulic oil is generally allowed in 55 ~ 65 DEG C, shall not exceed a maximum of 70 DEG c.. When the natural cooling oil temperature exceeds the allowable value, need to add cooling water or the interior of the fuel tank in the return line is arranged cooler, in order to reduce the temperature of the hydraulic oil.

4, choosing appropriate structure of hydraulic components and fittings

Select the appropriate hydraulic components, such as solenoid directional control valve. If the system does not require fast switching, should choose the wet electromagnetic valve. Because the wet electromagnetic valve has long service life, small impact, push rod, dynamic seal, eliminating the push rod parts caused by leakage.

Hydraulic systems are commonly used in pipe joints are expanding type, the card type and welding type three class. The three connector has a characteristic each, should be done according to the reliability and economy of the choice. Flared joint general relatively cheap, card sets of joints can bear larger vibration, welding joint for can withstand high temperature and high voltage, mechanical load and strong vibration.

5, strict control of production quality

Strict control of sealing groove dimension tolerances, surface roughness to meet the drawing requirements. Slot no burr and bumps, before the assembly to be cleaned. The sealing cover and the cover flange screw hole size to ensure quality, the gap can not be too large, in order to avoid seal extrusion.

In addition, in the production process, to strengthen the maintenance and management, there are plans to regularly check, repair of hydraulic equipment, hydraulic equipment for protection, to prevent mechanical vibration and shock pressure, detect equipment leakage, thereby reducing failure and oil leakage, prolong the machine life, improve equipment intact rate.