Overview of the starting force of hydraulic cylinder

(1) the fuel tank volume is too small, the heat dissipation area is not enough, the oil cooling device is not installed, or the cooling device has a small capacity.

(2) according to the fast forward speed selection pump capacity of the quantitative pump oil supply system, in work will have most of the excess flow under high pressure from the relief valve overflow back and fever.

(3) in the system, unloading circuit failure or due to the failure of the unloading circuit, the oil pump can not be unloaded, the full flow of the pump at high pressure, resulting in overflow loss and fever, resulting in temperature rise.

(4) pipeline or too long, too much bending, local pressure loss and pressure loss along the way.

(5) the accuracy of the components is not enough and the assembly quality is poor.

(6) the fit clearance is too small, or the use of wear and tear to lead to large gap, the leakage of large, resulting in a large volume, such as the volume efficiency of the pump to reduce the temperature rise fast.

(7) hydraulic system working pressure adjustment is higher than the actual needs of a lot of. Sometimes it is the result of tight sealing, or because the seal is damaged, leakage increases to have to raise the pressure to work.

(8) the climate and environment of high temperature, resulting in temperature.

(9) the choice of the viscosity of the oil viscosity, the viscosity of large viscosity, viscosity is too small, the leakage increases, the two can cause fever temperature rise.

2, temperature rise too high hazard

(1) the machinery to produce thermal deformation, hydraulic components in the difference of thermal expansion coefficient of the moving parts due to the fit clearance becomes small and stuck, causing action failure, the impact of hydraulic system of transmission accuracy, leading to working parts quality becomes poor.

(2) the viscosity of the oil is reduced, the leakage increases, the volume efficiency of the pump and the efficiency of the whole system will be significantly reduced. Due to reduce the viscosity of oil, the oil film of the moving parts of the valve becomes thin and is cut, friction resistance increases, leading to increased wear and tear.

(3) the deformation of the rubber seal, accelerated aging failure, reduce the sealing performance and service life, resulting in leakage.

(4) accelerating the oxidation of oil, and reducing the use of the asphalt material and reducing the service life of the hydraulic oil. The release of the material plug the damping hole and the valve port, resulting in the pressure valve stuck and can not move, metal pipe elongation and bending, or even rupture, etc..

(5) the oil pressure drop of air separation, dissolved air escapes, oil cavitation, the working performance of the hydraulic system is reduced.

3, prevention and control measures

(1) according to different load requirements, often check, adjust the pressure relief valve, so that the right.

(2) a reasonable choice of hydraulic oil, especially the viscosity of oil, in the condition of the conditions, try to use a lower viscosity to reduce the friction loss.

(3) improving the lubrication condition of the moving parts in order to reduce the friction loss, reduce the working load and reduce the heat.

(4) improve the assembly quality and the accuracy of the hydraulic components and hydraulic system, and strictly control the fit clearance and improve the lubrication condition. The use of small friction coefficient of sealing materials and improved sealing structure, as far as possible to reduce the hydraulic cylinder of the starting force, in order to reduce the heat generated by the mechanical friction loss.