The failure of hydraulic valves will have a great impact on the whole hydraulic system. Starting from the common phenomenon of failure of hydraulic valves, this paper briefly summarizes the causes of failure of hydraulic valves, hoping to provide you with some reference.1. Mechanical failure!(1) Wear: The friction between the moving pairs of mechanical parts such as hydraulic valve core, valve sleeve and valve body constantly occurs in use, which makes the size, shape and surface quality of the parts change and fail.(2) Fatigue: When working under long-term variable load, the spring in the hydraulic valve will become soft, the length of the spring will be shortened or the whole spring will be broken due to fatigue; the valve core and seat will also be fatigued, resulting in cracks, spalling or other damage. All of these may cause the valve to fail.(3) Deformation: When the residual stress of the hydraulic valve parts in the process of processing and the external load stress in the process of using exceed the yield strength of the material of the parts, the parts will deform and fail to perform their normal functions.(4) Corrosion: Hydraulic oil mixed with excessive moisture or acidic substances, long-term use, will corrode the relevant parts of the hydraulic valve, so that it loses its due accuracy and failure.2. Hydraulic clamping: When the pressure oil flows through the cylinder sliding valve structure of the hydraulic valve, the radial unbalanced force acting on the valve core causes the valve core to clamp, which is called & ldquo; hydraulic clamping & rdquo;.3. Hydraulic shock: Because of the rapid reversal or closure of the oil pipeline in the hydraulic system, the oil flowing in the system suddenly reverses or stops flowing, which causes the pressure to rise sharply, forming a great peak pressure, that is, hydraulic shock.4. Cavitation PhenomenonIn the hydraulic system, the phenomenon of bubbles caused by pressure drop due to the change of liquid flow velocity is called & ldquo; cavitation & rdquo;. Cavitation and cavitation deteriorate the performance of hydraulic system and reduce its reliability.To sum up, the mechanical failure of hydraulic valves is mainly related to management besides the manufacturing factors, so don't wait until the hydraulic system can't work properly. Dalan Hydraulic reminds us that we should make more pre-judgment and pre-treatment in peacetime to eliminate the equipment failure caused by valve failure in the budding state. 672-1T 524-1T 608-1T 522-2T 538-1T 501-1T DSHG-04-3C4-T-D24-52 BG-06-32 DSHG-04-2B2-T-D24-N1-52 DSHG-06-3C2-D24-N1-53