Understanding Hydraulic Piston Pump Noise: Causes and Solutions

Noise inherent in hydraulic piston pumps. 

This is caused by the plunger squeezing and releasing the oil during operation.

This noise is unavoidable, but can be reduced by some measures, such as improving the structural design of the pump, use of low-noise hydraulic fluid.

Cavitation noise. When air is mixed in the hydraulic oil, the gas will be sucked into the suction chamber of the pump along with the oil. 

Under High Pressure, the air bubbles will be compressed and rupture, emitting a sharp noise. 

This noise is usually more obvious on the suction side of the pump.

Mechanical noise. This is caused by worn, loose or damaged mechanical parts of the pump. 

This noise is usually related to the speed of the pump; the higher the speed, the louder the noise.

Specifically, hydraulic Piston Pump noises can be caused by the following reasons:

Loose pipes and fittings. If the pipes, fittings and other parts are not securely installed, they will vibrate under pressure and make noise.

Wear and tear of bearings. The bearing is an important part of the pump, if it is badly worn, it will make noise.

Plunger and plunger sleeve wear. The plunger and plunger sleeve are the core parts of the pump. If they are worn, they will leak and make noise.

Damage to the flow Control Valve. The flow control valve controls the direction of oil flow. Damage to the valve will affect the normal operation of the pump and cause noise.

Improper adjustment of the safety valve. The safety valve is used to prevent the pump pressure from becoming too high, and if it is not adjusted properly, it will make noise.

If the hydraulic piston pump makes a noise, you should find the cause and take measures to eliminate it. Otherwise, the pump may be damaged or even an accident may occur.

The following are some common ways to eliminate the noise of Hydraulic Piston Pumps:

Check whether the pipes and joints are loose and tighten the loose bolts.

Replace worn bearings.

Replace worn plunger and plunger sleeve.

Repair damaged flow distribution valves.

Adjust the safety valve.

If you cannot eliminate the noise by yourself, have it repaired by a professional.

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