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Dry cargo – Hydraulic fault inspection and maintenance methods. We are manifold Block Manufacturers, China Manifold Block Suppliers manufacturer

Added time: 2020-11-17

In the hydraulic work of construction machinery, it is hard to avoid hydraulic faults. For simple faults, they are easy to be eliminated, but how to deal with relatively complex situations? Today, the front special small make up for you to sort out some maintenance methods, for your reference. manifold block manufacturers,china manifold block suppliers manufacturer

 

1, intuitive inspection method

 

For some relatively simple faults, you can check the parts by seeing, hand model, ear hearing and smelling, for example, through visual inspection can find such as rupture, oil leakage, loosening and deformation of the fault imagination, so as to timely repair or replace the parts; Holding the tubing (especially the hose) by hand, there will be a vibration feeling when there is pressure oil flow out, and no oil flow or pressure is too low, there is no such phenomenon. We are manifold Block Manufacturers, China Manifold Block Suppliers manufacturer

 

Summary of years of maintenance experience: hydraulic fault inspection method

 

In addition, the hand can also be used to judge whether the lubrication of the hydraulic components with mechanical transmission parts is good, feel the temperature change of the component shell by hand, if the component shell is overheating, it indicates poor lubrication; The ear can judge the fault point and damage degree caused by mechanical parts damage, such as hydraulic pump suction, relief valve opening, component hair card and other faults will emit abnormal sound such as water impact sound or “water hammer”; Some parts will emit odor due to overheating, poor lubrication and gas corrosion, etc., and the point of failure can be judged by smelling. We are manifold Block Manufacturers, China Manifold Block Suppliers manufacturer

 

2. Alternate diagnostics

 

In the maintenance site lack of diagnostic instruments or components to be examined more precise should not be disassembled, should use this method to remove the suspected fault components, replace the new parts or other machines working normally, the same type of components for testing, see whether the fault can be removed can be diagnosed. We are manifold Block Manufacturers, China Manifold Block Suppliers manufacturer

 

Summary of years of maintenance experience: hydraulic fault inspection method

 

In order to check the fault diagnosis method, although by the structure, site component reserve or disassembly inconvenience and other factors, the operation may be more troublesome, but for such as balance valve, relief valve, one-way valve and other small size, easy to disassemble components, using this method is more convenient. The replacement method can avoid the performance reduction of hydraulic components caused by blind disassembly. If the above fault is not checked by substitution method, but directly remove the suspect main safety valve and disassemble it, if the component is not problematic, its performance may be affected after reassembly. We are manifold Block Manufacturers, China Manifold Block Suppliers manufacturer

 

3, instrument measurement inspection method

 

The failure point of the system can be judged by measuring the pressure, flow rate and oil temperature of the hydraulic oil in each part of the hydraulic system. In general field testing, the failure of the hydraulic system is often manifested as insufficient pressure, which is easy to detect. The flow detection is more difficult, the size of the flow can only be executed by the speed of the component action to make a rough judgment. Therefore, in the field test, the method of detecting system pressure is more used. We are manifold Block Manufacturers, China Manifold Block Suppliers manufacturer

 

Summary of years of maintenance experience: hydraulic fault inspection method

 

Failure, the more common is the loss of hydraulic pressure. If it is found to be a hydraulic cylinder problem, it can be further dealt with:

 

In general, the leakage of hydraulic cylinder is divided into internal leakage and leakage. As long as we look carefully, we can determine the cause of external leakage. It is difficult to judge the cause of the internal leakage of the hydraulic cylinder, because we can not directly observe the part of the internal leakage. We are manifold Block Manufacturers, China Manifold Block Suppliers manufacturer

 

One, external leakage.

 

1. The sealing damage of the protruding end of the piston rod and the piston rod is mostly caused by the piston cylinder being bristled, and also caused by aging.

 

2. Cooperate with cylinder liner piston rod out end seal damage, this is caused by long-term use of seal aging more, also has a lot of end cover on is too hard to seal extrusion is damaged, there is a lot of domestic manufacturer of hydraulic cylinder design is not reasonable, in most cases, the manufacturer is to save cost.

 

3. The cracking of the inlet and outlet pipe joint of the oil cylinder will also lead to the leakage of the hydraulic cylinder. We are manifold Block Manufacturers, China Manifold Block Suppliers manufacturer

 

4. Oil leakage caused by defects on the cylinder block or cylinder end cover.

 

5. The piston rod is pulled up groove, pit point, etc.

 

6. The deterioration of lubricating oil makes the temperature of the cylinder rise abnormally, prompting the aging of the sealing ring.

 

7. Oil leakage caused by often exceeding the pressure range of the oil cylinder. We are manifold Block Manufacturers, China Manifold Block Suppliers manufacturer

 

Two, internal leakage

 

1. The wear ring on the piston is severely worn, leading to friction between the piston and the cylinder liner, and finally pulling the cylinder liner, piston and seal.

 

2. Long-term use of seal failure, piston seal (mostly U, V, Y ring, etc.) aging.

 

3. The hydraulic oil is dirty, and a large number of impurities enter the cylinder to wear the piston seal to the bad, usually iron filings or other foreign matters. We are manifold Block Manufacturers, China Manifold Block Suppliers manufacturer

 

Three, the use of hydraulic cylinder matters needing attention

 

1. When usually used, we should pay attention to protect the outer surface of the piston rod to prevent damage to the seals by knocking and scratching. Now some engineering machinery cylinders are designed with protective plates. In addition, I also need to often clean the cylinder dynamic seal dust ring parts and exposed piston rod on the sediment, to prevent sticking on the surface of the piston rod is not easy to clean dirt into the cylinder, resulting in piston, cylinder or seal damage. We are manifold Block Manufacturers, China Manifold Block Suppliers manufacturer

 

2. In ordinary use, we should also pay attention to often check the thread, bolt and other connection parts, found loose immediately fastened. Because these places loose can also cause hydraulic cylinder oil leakage, which is very well understood for people engaged in construction machinery.

 

3. Often lubricate the connection parts to prevent corrosion or abnormal wear under the condition of no oil. We also need to pay attention to. Especially for some parts with rust phenomenon, we should deal with it in time to avoid hydraulic cylinder oil leakage caused by rust. We are manifold Block Manufacturers, China Manifold Block Suppliers manufacturer

 

4. During ordinary maintenance, we should pay attention to the regular replacement of hydraulic oil, timely cleaning of the system filter, to ensure the cleanliness of hydraulic oil, which is also very important for extending the service life of hydraulic cylinder.

 

5. In ordinary work, we should pay attention to the control of the system temperature, because the oil temperature is too high will reduce the service life of the seal, and long-term oil temperature will make the seal permanent deformation, serious will make the seal failure.

 

6. Usually, we should conduct a test run of full extension and full contraction for 3-5 strokes before working in each use. The purpose of this is to exhaust the air in the system, preheat the system, so as to effectively avoid the existence of air or water in the system, causing gas explosion in the cylinder block, which will damage the seals, resulting in leakage and other faults in the cylinder. We are manifold Block Manufacturers, China Manifold Block Suppliers manufacturer

 

7. After the completion of each work, we need to pay attention to the big arm and bucket to keep in an optimal state, that is, to ensure that the hydraulic oil in the hydraulic cylinder all reflux to the hydraulic tank, to ensure that the hydraulic cylinder does not bear pressure. Because the hydraulic cylinder bears pressure in one direction for a long time, it will also cause damage to the seals. We are manifold Block Manufacturers, China Manifold Block Suppliers manufacturer

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