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    Common problems with hydraulic hoses(4)

    Problems with hose ruptures:

    1.One or more cracks in the hydraulic hose, this phenomenon is due to the system pressure is too high, more than the pressure strength of the hose. If the system pressure meets the requirements, check that the actual pressure resistance of the hose used meets the design requirements.

    2. Torsion in the area where the hose is broken, which is caused by excessive distortion of the hose during installation or use. After the hose is twisted, the structure of the reinforcement layer changes and the gap between the braided and winding wire increases, which reduces the pressure strength of the hose and makes the hose easily cracked under high pressure. Therefore, the hose should not be subject to torque during use or storage. When installing hoses, the shafts of the two connectors should be placed on the same plane whenever possible to avoid twisting the hoses during use.

    3. The wire curls at the cracking mouth of the hose, and there is a clear shrinkage of the neck. This is caused by overstretching of the hoses and the separation of the layers, which reduces the pressure strength. Under high pressure, the hose shrinks or stretches in the direction of length. In general, the amount of scaling in the normal state is plus 2% to -4%. If the hose selected during installation is too short, it will be subject to a great pull during operation. In severe cases, failures such as breakage or loosening can occur. If the hose span is too large, the hose weight and the weight of the oil will also cause the hose to be more pulled, in severe cases, the above fault can occur. Therefore, the appropriate solution should be taken on a case-by-case basis. If it is too tight during installation, it should be replaced with a new long tube, and if the span is too large, an intermediate support clip should be added.