Hydraulic system, as a precise complex integrating mechanical, electronic and hydraulic technologies, its stable operation is crucial to the performance of various types of equipment. Maintaining the hydraulic system is not only the key to ensure its continuous and efficient operation, but also the inevitable choice to extend the life of the equipment. In this paper, we will discuss the characteristics of the hydraulic system failure, and elaborate on the core content of the maintenance process and requirements, aims to provide you with a practical maintenance guide.
1. Multi-dimensional analysis of hydraulic failure
Hydraulic failure, in short, that is, hydraulic components or systems fail to achieve the desired function of the state. These failures can be subdivided into three categories: complete failure (e.g., broken pump shafts, burned solenoids), functional decline (e.g., pump volumetric efficiency decline, slowing down of hydraulic cylinders), and malfunction caused by misoperation. In addition, the noise and vibration of the hydraulic system, such as high-frequency sound when the relief valve pressure relief, hydraulic shock caused by vibration, etc., is also a problem that can not be ignored.
Hydraulic failure presents four distinctive features:
(1) hidden: faults are often hidden inside the system, limited by the detection conditions and the difficulty of disassembly, direct observation becomes particularly difficult. Coupled with the interference of random factors, fault analysis is even worse.
(2) intertwined: the complexity of the symptoms and causes, a symptom may originate from a variety of factors, such as the implementation of the component speed decline may be too large a load, component wear and tear, rail error, system leakage, voltage regulation or speed control system failure, etc. are closely related. At the same time, multiple sources of failure may be superimposed to cause the same symptom.
(3) Randomness: During operation, random factors such as grid voltage fluctuations, ambient temperature changes, work task adjustments, and the accidental intrusion of external pollutants make the occurrence of faults more uncertain, increasing the difficulty of diagnosis and quantitative analysis.
(4) Difference: design and material differences lead to different component wear rate, need to be based on specific equipment and components to develop wear evaluation criteria, which depends on the accumulation of long-term operational data.
2. Comprehensive guide to hydraulic system maintenance
Minor repair content and requirements. Minor repair to the operator as the main, maintenance workers to assist, mainly on the equipment for local disassembly, inspection and cleaning, and fasten the connectors. Specific steps include:
(1) Filter the oil in the tank, and replace it when it deteriorates.
(2) Check and replace the screen and air filter.
(3) Clean the inside and outside of the tank.
(4) Replace seals in leaking areas.
(5) Tighten the pipe joints, gland and flange bolts.
(6) Replace the problem hydraulic oil pipe.
(7) Clear the obvious external leakage.
(8) Check the electrical wiring of the solenoid valve solenoid, pressure relay and travel switch.
Overhaul content and requirements. Overhaul is the responsibility of professional maintenance personnel, the requirements are more stringent:
(1) Hydraulic cylinder: replace the seals, and replace the whole set if it cannot be repaired. Repair parts need to ensure that no cracks and scratches, to meet the performance requirements.
(2) hydraulic valve: cleaning and replacement of seals, springs and other wear parts, serious wear components need to be replaced.
(3) hydraulic pump: repair and test to ensure that the main technical indicators up to standard, or replace the new pump.
(4) pressure gauge: performance measurement and calibration, substandard replacement. The new table needs to be flexible and reliable, clear, accurate instructions, switch adjustment is sensitive, safe and reliable.
(5) Fuel pipe: clean, replace the problematic fuel pipe, arrange the pipe neatly, and match the pipe clamps.
(6) Fuel tank: clean the inside, replace the damaged air filter and filter, complete the accessories, the oil level indicator is clear and obvious.
(7) Oil drain pipe: make sure it is inserted below the oil level to prevent foam and air from being sucked in.
(8) system operation: the oil tank should not produce foam.
Maintenance of the hydraulic system is a systematic project that requires comprehensive consideration of the failure characteristics and maintenance requirements to ensure that each step of the operation is accurate and in place to maintain the stability and efficient operation of the system. If you want to know more professional knowledge about hydraulic system, you can browse the official website of Hanjiu Company, which produces hydraulic pumps and spare parts. The products are sold all over the world and have gained good reputation and feedback. At present, we have agents in more than ten countries and regions around the world.
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