Piston compressor crosshead hydraulic connection tightening device

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Principle: By connecting the piston rod to the crosshead through a fastening device, a manual ultra-high pressure oil pump is used to inject oil at a pressure of approximately 150 Mpa into the pressure chamber designated as number 7 in the fastening device. Utilizing the incompressibility of liquids, this pressure pushes the piston designated as number 5, causing elastic stretching deformation at the end of the piston rod. After locking in the nut designated as number 4, the pressure in the system is released, thereby achieving the preload required for the connection. During the connection and pressure testing process, it should be noted that the oil pump pressure must not exceed 150 Mpa. The tightening process must be carried out three times, with a 1-hour interval between each iteration, and the same tightening method must be used each time.