Where is the noise of the four-column hydraulic press motor?

The noise sources of the four-column hydraulic press motor mainly include the aerodynamic noise generated by the cooling fan, the unbalanced operation of the rotor, and the noise caused by electromagnetic vibration, commutator and various components and other vibrations.

In the four-column hydraulic press, various valve bodies rely on the action of springs, which are prone to vibration. When the reversing valve of the hydraulic press changes direction, the impact sound is instantaneous; and the high pressure generated by the spool when the relief valve is drained The frequency vibration is continuous. If the external interference frequency of the four-column hydraulic press is just the damping frequency formed under the state, it will cause resonance and increase the noise. In the hydraulic transmission pipeline system, due to the unstable flow of oil caused by some components or external interference, this state is only temporary, and shock waves will be generated inside the pipeline of the four-column hydraulic press. Under certain conditions, the pipeline and the pump or The combination of valves will produce continuous vibration of the oil in the pipeline system, and when the length of the pipeline is just equal to the isocratic degree of the pipeline where the resonance occurs, strong high-frequency noise will be generated.

During the working process of the hydraulic pump and hydraulic motor of the four-column hydraulic press, the periodic fluctuation of the oil pressure in each working chamber and the sharp periodic change of the working chamber in the oil pressure area make the parts shell generate vibration noise. The phenomenon of cavitation causes intense and irregular vibration; in another case, the energy pulsation of different degrees is converted into pressure pulsation when it encounters resistance, resulting in forced vibration of the container. At this time, the four-column hydraulic press produces liquid noise.

The four-column hydraulic oil tank is a device with a large radiation area, and it is also the main component for transmitting and amplifying noise. If the hydraulic pump motor is directly installed on the top cover of the oil tank, the vibration of the pump or motor will cause the vibration of the oil.

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