Many customers have found that when using high pressure pump, the gear of high pressure pump often appears noise, how to produce and how to solve it.

The cause of noise is:

(1) the impact of the rotary blade on the cylinder, the residual volume of the high pressure gear and the sound of the pressure oil in the exhaust air gap;

(2) the impact of the exhaust valve on the seat and support;

(3) the echo of the body and the sound of bubble rupture;

(4) bearing noise;

(5) the noise caused by a large amount of gas, oil shock and oil baffle.

(6) others, such as noise caused by transmission, fan noise of high pressure pump of air cooled gear and so on.

(7) motor noise, which is a crucial factor.

The following are as follows:

1) rotary vane impact to the cylinder wall. If the design, manufacture or use of materials properly, causing poor sliding rotary vane, or die because of the exhaust gap caused by the incompressible oil rotary vane head does not always close to the cylinder operation, will cause the rotary vane to the cylinder wall impact sound. Therefore, should be separated into the exhaust structure in the garden. The arc exhaust diversion tank to eliminate dead gap. In the lane structure, should try to shorten the exhaust end point distance, for rotary gear high pressure pump below 70L/s, considering the actual thickness of the rotary vane, it is recommended to take 7 ~ lOmm, high pressure gear pump too large value. Recently, due to the presence of a groove and the rotary vane rotor vane is only a narrow head with contact, rotary vane position to cut once the sealing effect is not good, it will affect the pumping speed of the high-pressure pump and the limit pressure. This structure can not completely eliminate visible exhaust die gap, limiting the noise Level.

It is necessary to point out that the gap with rotary vane groove will reduce performance. Therefore, to ensure a reasonable tolerance and shape tolerance value, pay attention to the thermal expansion of the rotary vane, rotary vane slot and avoid napping, pay attention to the cold oil viscosity, design of the rotary vane spring force enough, in the circular arc surface when separated, additional eccentric rotor center value should not be too large. Otherwise, the vane through the two circle arc, will produce from the wall trend at the intersection, but caused little impact noise. The general high pressure pump is 0.20 ~ 0.25mm, high pressure pump can be increased properly.

The exhaust sound pressure oil pressure oil and dead volume in the residual gap. The high-pressure pump to the limit pressure, the two pressure oil in the vacuum chamber and connected to the vacuum chamber at high speed, the rotor and the cylinder impact sound. Two the size of the volume, location and noise.

2) the impact noise of the valve plate on the seat and support
The inhalation of the gas volume, the amount of circulating oil pressure pump, the valve noise is greater, valve vault, valve area, valve noise and large valve plate material also has certain effect. The noise rubber valve should be less than steel or laminates as well. Therefore, to control the oil inlet the amount, the valve is closed in a timely manner, to close attention. The selection and design of the valve.

3) the noise will increase when the echo volume and the air volume of bubble burst increase. Therefore, the noise will increase obviously when the gas is released or the air is released. If the amount of gas is adjustable, the amount of gas can be adjusted reasonably.

4) a large number of gas and oil discharge noise impact oil baffle plate and other parts of the parts. If the lack of rigidity, or fastening, vibration and impact, will make the noise increase. So the oil baffle plate should not only have enough stiffness and fastening, and in need with other parts (such as contact tank) when using the method of clamping the rubber can avoid collision noise caused by vibration, and improve the effect of the oil.

I hope this article will help you better understand and use the high pressure pump. If there is no understanding of the place, you can call and consult.