How to use hydraulic oil properly in hydraulic presses

Different hydraulic system how to use the correct hydraulic oil, according to some information statistics prove that the hydraulic system failure causes 70% to 85% is due to hydraulic oil contamination caused by deterioration. Because the hydraulic system used in a variety of pumps, valve components, relative to the moving parts have a high degree of cooperation between the surface and precision with a high degree of clearance, some components also have a block hole, gap control valve opening, if the oil mixed with impurities, will block these gaps, small holes, impede the movement of the fluid, the normal work of hydraulic components. Keeping the hydraulic system and hydraulic oil clean is the key to maintaining the hydraulic system. The hazards of fluid contamination on the system are as follows:

(1) contamination of components wear

Various contaminants in the fluid cause various forms of component wear, solid particles into the gap of the moving parts, the surface of the parts produce cutting damage or fatigue wear. In addition, the air in the system's fluid leads to cavitation, resulting in component surface stripping and damage.

(2) Component blockage and jamming failure

Solid particles clog the gap and orifice of the hydraulic valve, causing spool blockage and jamming, affecting the work performance.

Water and air in the fluid with its thermal energy is the main condition of the fluid oxygen, and metal particles in the fluid plays an important catalytic role in the oxygen of the fluid, in addition, the water and suspended air bubbles in the fluid significantly reduces the strength of the oil film between the moving parts, so that the lubrication performance is reduced. To do the following points:

(1) According to the manual, choose the appropriate hydraulic oil.

(2) the use of closed tank, in the tank population installed with a certain precision of the air filter.

(3) In the process of use, should prevent moisture, emulsion, dust fiber debris and other mechanical debris.

(4) The oil volume of hydraulic oil should be appropriate. Hydraulic oil tank oil volume in the system piping and components filled with oil should be maintained in the specified oil level range.

(5) Components, pipelines and systems must be strictly cleaned before they are put into use.

(6) must be strictly filtered when refueling.

(7) regularly check the quality of the hydraulic oil, keep the hydraulic oil clean.

(8) when replacing the hydraulic oil, pay attention to should be in the machinery just after work, while the hydraulic oil hot release, in order to easily discharge mechanical impurities such as oil pollution.

(9) correct cleaning of the hydraulic system.

Prevent the hydraulic system into the air, the hydraulic system into the air, will make the hydraulic fluid emulsification phenomenon, destroy the performance of the fluid. Therefore, the hydraulic actuators in the work of the sudden stop and go, slow speed, lack of power and other phenomena, usually this phenomenon is called "work crawl", this phenomenon not only destroys the stability of the system work, but also generate noise, the specific methods are as follows:

(1) suction piping and pump drive shaft end seals and other parts of the lower than atmospheric pressure, pay attention to no air leakage.

(2) to prevent the return of the oil pipe mouth when the air is brought in, do not make the surface of the oil return pipe.

(3) If the system has entered the air, should promptly investigate the air leakage parts for elimination, and remove the air from the system.

(4) After adding new oil, the working device should be continuously manipulated to lift, drop and turn over in order to exclude the air in the system and correctly implement the operation procedures.

In the excavation, rotation, lifting and other operations, the action should be smooth and accurate, put away the joystick in time, avoid too fast, so as not to suddenly open or close the hydraulic cylinder and hydraulic motor and other executive structure outlet impact, strengthen the daily maintenance of the hydraulic system and maintenance.

Four column hydraulic press

Frame hydraulic press