Hydraulic brick press oil pump

 

1、 Coupling unbalance

 

In the hydraulic system, the motor drives the oil pump through the coupling. It is difficult to achieve complete dynamic balance when the coupling works. If the unbalanced force is too large, the rotating shaft will produce large bending vibration and noise during rotation.

 

Solution: select the coupling with qualified quality, and replace the coupling after use for a period of time. Long time wear will cause unstable operation of the coupling.

 

2、 Improper installation

 

During the installation of the hydraulic system, if the center line of the oil pump and the motor does not coincide, vibration will occur during operation.

 

Solution: reinstall the oil pump and motor, and measure whether their center lines are consistent. If not, adjust them.

 

3、 Periodic changes of oil pump pressure and flow

 

In the process of oil suction and pressurization, the gear, blade and plunger of the oil pump make the corresponding work produce periodic flow and pressure, and make the corresponding working chamber produce periodic flow and pressure changes, so as to cause the flow and pressure pulsation of the pump and the vibration of each component of the hydraulic pump. The vibration of each component causes the vibration of the air in contact with it and generates the sound pressure wave propagation of noise.

 

Solution: check whether the oil pump is damaged and check regularly to avoid hydraulic pulse.

 

4、 Cavitation of oil pump

 

When the oil pump works, the resistance of the oil suction pipe is too large, and the hydraulic oil will not fill the oil suction chamber of the pump, resulting in partial vacuum in the oil suction chamber and negative pressure. If the pressure just reaches the air separation pressure of the oil, a large amount of air dissolved in the oil will be released to form a free state of bubbles. With the rotation of the pump, the oil with bubbles will enter the high-pressure area, Bubbles shrink, break and disappear due to high pressure, forming local high-frequency pressure impact.

 

Solution: check the reason for the high resistance of the oil suction pipe, whether it is the blockage of the oil pipe, and clean it to solve the vibration of the oil pump.

 

5、 Pipe vibration

 

The vibration caused by the interaction of hydraulic components such as oil pump and valve in the pipeline will produce strong high-frequency vibration when the pipeline length is exactly equal to an integral multiple of half of the vibration pressure wavelength. The external source may also cause the resonance of the pipeline. When the cross-sectional area of the pipeline changes suddenly, the liquid flow in the pipeline will change, which is easy to produce turbulence and vibration, resulting in the vibration of the oil pump.

 

Solution: fix the pipeline. Do not connect the metal oil pipe directly to the hydraulic pump station. The middle can be connected through soft oil pipe to avoid vibration.

 

6、 Air in hydraulic system

 

When the hydraulic oil in the oil tank is lower than that under the oil suction pipe, the oil pump cannot absorb enough oil during operation, and part of the air is sucked into the oil pump, resulting in oil pump vibration.

 

Solution: regularly check the amount of hydraulic oil. If the oil is lower than the oil suction pipe, fill it.

 

The above is the various causes and corresponding solutions for the vibration of the oil pump of the full-automatic hydraulic brick press summarized by Bona for you. The oil pump vibration is caused by the equipment quality, installation method and the later maintenance of the customer. The manufacturer and the customer should cooperate closely to ensure the normal operation of the hydraulic brick press.

 

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