Research of the service life of high-pressure hoses of port forklifts
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Abstract
The paper research the service life of high-pressure hoses of forklifts with a lifting capacity of 20 tons. Forklifts are used for cargo transshipment in a seaport. The article describes the study of high-pressure hoses and the reasons for their decommissioning, as well as examples of studies performed using visual and metallographic methods. Six identical forklifts with a lifting capacity of 20 tons, which have been used in summer and winter in seaports for more than 15 years to move piece cargo, were studied. It was found that most often the hoses fail due to violation of the operating requirements recommended by the manufacturer in the form of destruction and delamination. In addition, it was found that 60% of the failures of the HPH are due to premature failure of the seals. The service life of the hoses is 3500 motorhours in winter and 4600 motorhours in summer. The number of failures during the winter season is significantly higher than in the summer. This can be explained by the negative impact of cold temperatures on the physical and mechanical properties of the hoses
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