The situation and hazards of the expansion of a single hydraulic prop in the production process are briefly introduced. The technical conditions such as theoretical calculation, laboratory experiments and ferrographic analysis were used to study and analyze the conditions and causes of the expansion cylinder.
The results show that the single hydraulic prop can guarantee normal work under the condition of rated working resistance.Only in the case of the failure of the three-purpose valve, the pressure in the piston cavity cannot be released after the rated value exceeds the limit caused by the hydraulic pressure. Deformation and damage caused by stress. According to the results of the research and analysis, for the product design, research and development, manufacturing, repair, and use management of the single hydraulic prop, measures are proposed to prevent the failure of the control components of the hydraulic system, avoid expansion of the cylinder, and enhance safety and reliability.
At the same time, the repair and utilization methods of deformation and wear of bores in the cylinder are briefly introduced. This paper has high reference value for improving the reliability of single hydraulic props, reducing consumption and efficiency, promoting the realization of safe production, and the design and development of single hydraulic props.
