Installation requirements for hydraulic cylinders and pumps of four-column hydraulic presses

Installation requirements for hydraulic cylinders and pumps of four-column hydraulic presses

The hydraulic cylinder for installing the four-column hydraulic press should be reliable, the piping connection should be appropriate and there should be no looseness, and the installation surface of the hydraulic cylinder and the sliding surface of the piston should maintain sufficient parallelism and verticality.

For the four-column hydraulic machine foot-fixed mobile cylinder, its central axis should be concentric with the axis of the load force, so as not to cause side force, which can easily accelerate the wear of seals and damage to the piston. Install the hydraulic cylinder on moving objects to make the cylinder Keep parallel to the moving direction of the moving object on the guide rail surface, and tighten the sealing gland screw of the hydraulic cylinder to ensure that the piston can move flexibly on the full stroke, without blocking and uneven weight. It will increase the resistance and accelerate the wear, and if it is too loose, it will cause external leakage of the hydraulic machine. In the case of large stroke and high working oil temperature, one end of the hydraulic cylinder of the four-column hydraulic machine must be kept floating to prevent the influence of thermal expansion.

Generally, the hydraulic pump of the hydraulic press is arranged on a separate oil tank. There are two ways: horizontal and vertical. The vertical installation pipeline and pump are all inside the oil tank, which is convenient for collecting oil leakage. The shape is neat, while the horizontal installation pipeline is exposed outside. Maintenance is more convenient; the hydraulic pump of the four-column hydraulic press is generally not allowed to bear radial load, so the commonly used motor is directly driven by the elastic coupling, and the shaft of the motor and the hydraulic pump should have a high concentricity during installation, and the deviation should be within 0.1 Below mm, the inclination angle should not be greater than 1°, so as not to increase the extra load of the pump shaft and cause noise.

When the hydraulic pump must be driven by a belt or a gear, the hydraulic pump should be relieved of radial and axial loads. The hydraulic motor is similar to the pump. Some motors are allowed to bear a certain radial or axial load, but should not exceed the specified allowable value. ; And some pumps allow a higher oil suction height, some pumps require that the oil suction port must be lower than the oil level, and individual pumps without self-priming ability need to be provided with an auxiliary pump to supply oil. WORLD Press Machine official website www.pressmachine-world.com, please indicate the source for reprinting!

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