Pressure is a common cause of valve failure and maintenance points for attention

Pressure is a common cause of valve failure: In the hydraulic system of agricultural machinery Pressure control valve is a kind of widely used element, the sudden failure of pressure valve will directly affect the normal operation of mechanical equipment, this paper is divided into the causes of the failure of the pressure valve.

(1) The use of hydraulic valve spool and valve body, generated continuously due to wear, the size, shape and surface quality are changing.

(2) The balance of hydraulic valve springs, valve core and the valve seat, in the long-term work under varying load, fatigue and crack, resulting in the spring, broken, or seat sealing surface spalling damage.

(3) The hydraulic valve in the process of machining residual stress and the use of residues in the process of load stress, exceed the yield strength of materials, the deformation of the parts.

(4) The hydraulic oil mixed with water or acid, after use for a long time, the corrosion of hydraulic valve parts to make them forfeit their accuracy.

(5) The valve core and the valve suite solution for unbalanced radial force, and ultimately the valve core is the emergence of the phenomenon of clamping pressure to the valve liner's inner surface.

(6) At the time of manufacture or repair of hydraulic valve, do not meet the technical requirements of the provisions; Or spare parts storage, corrosion, mixed with dirt and so on.