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Effect of service conditions on the service life of high pressure steel wire braided hose

时间:2022-05-13浏览次数:231

The service life of high-pressure steel wire braided rubber hose depends on its service conditions. Regularly check the pipe components in use for leakage, kink, blistering, wear, scratch or other damage. When components are found to be damaged or worn, they must be replaced immediately. The inner rubber layer is in direct contact with the liquid, and it is required to be free from fluid corrosion and leakage under long-term working conditions.

High pressure steel wire braided hose can withstand certain pressure under the action of the reinforcing layer, so nitrile rubber should be used. In addition to the compound, the main factors affecting the performance are the hardness, thickness and permanent deformation of the inner rubber layer. Hardness and permanent deformation have a great impact on the sealing performance. Generally, the higher the hardness, the smaller the permanent deformation after compression, and the better the sealing performance. Generally, the shore hardness is 70 ~ 85 and the compression set is 50%.

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The thickness of the inner rubber layer is 1.5 ~ 2.5 mm. If it is too thick, it will increase the flow when it is intercepted, resulting in excess glue accumulation on the contact end face between the connector core sleeve and the rubber tube, reducing the overflow section; If it is too thin, it will break during buckling. At the same time, the wall thickness uniformity of the inner adhesive layer is also very important. If the thickness is uneven, one side will crack and the other side will pile up glue after being pressed.

The pitting on the surface of the inner rubber layer is also an important factor affecting the performance and quality. The corrosion of the hydraulic hose usually leads to external leakage. The corrosion of the inner adhesive layer is usually caused by concentrated high-speed fluid or fine particles in the fluid.

In order to avoid the corrosion of the inner rubber layer, the appropriate size of high-pressure steel wire braided hose should be determined according to the recommended high flow rate. In addition, it should be ensured that the hose components will not be excessively bent, and the fluid medium will not cause excessive wear to the inner rubber layer of the hose. In the process of hose assembly, it is very important to comply with the requirements of large bending radius and diameter specified in each hose engineering specification.


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