Commom Reasons For Hose Assembly Failure

Generally speaking, all hydraulic hose of fully mechanized coal mining and high-end general industrial equipment are major composed of high pressure rubber hose assembly and relevant hose accessories. In order to meet various requirement, we have full range of hydraulic hose with different specifications, and each models of the amount of use is large. However, under certain strict environment or failure operation, hydraulic hose might damaged. There are many forms of failure, and the reasons are quite complicated. In the working roadway, hundreds of meters long, exposed high-pressure pipelines, any failure may increase safety hazards; failure will directly cause the working face to stop, affect production efficiency, increase maintenance costs; in addition, replace in harsh environments high pressure rubber hose will inevitably pollute the system, increase the hidden troubles of other links in the system, and reduce the reliability and efficiency of the entire hydraulic system. This is a concern for each hydraulic system.

The reasons for the failure of the mine high pressure rubber hose assembly and intermediate joint components are summarized as follows:

 

(1) The pressure source of the hydraulic (emulsion) system adopts a three-piston pump or a five-piston pump, with high rated pressure, large flow, and large pressure pulsation. After long time usage, the component of the pipeline is easy to fatigue and damage.

 

(2) The emulsion medium has low privacy, high density, and relatively poor corrosion resistance. Especially, the pH of the water in different mining areas is very different, and the management is not strict during use. The underground emulsion often fails to reach the specified oil-water ratio, and the rubber has been in In the immersion of this medium, it will inevitably deteriorate, harden and age.

 

(3) The damage of the inner rubber layer of the high-pressure hose might accelerates the corrosion of the steel wire, which affect the compressive strength of overall working performance. When the pressure wave hit strongly on the hose and the fitting, it also leads to the fracture of dangerous sections of the high pressure rubber hose assembly and joint components.

(4) When hose is used in the coal mine environment, the dusty, wet and alkaline water might against the hose surface cover. so that the rubber on the surface of the high-pressure hose is worn, and the anti-corrosion layer on the surface of the joint component falls off, which promotes the damage process.

(5) Specification of hydraulic fitting. Some factories that produce high pressure rubber hose assembly and joint components are small and medium company. Their limit investment in technology, equipment, might not produce the product strictly following to drawing or requirement. After crimping, hose and fitting can not work well connection, which cause the possibility of damage.

(6) Hose kit is not reasonable be made. Each hose has its max working pressure for actual operation reference. The unsuitable assembly combination might not help the fluid power work like the way people want.