How to reduce fire pump noise? - just three steps
First, reduce the impact of the fire pump rotor on the cylinder wall, control the noise
At the beginning of fire pump design and production, reasonable calculation of tolerance tolerance and form and position tolerance value, pay attention to reduce the thermal expansion of the rotary vane, avoid the rotation of the rotary vane and the groove galling, pay attention to the viscosity of the cold oil, then, When using line separation structure, minimize the distance from the exhaust end point to the tangent point, It can effectively control the impact of the fire pump rotor on the cylinder wall, thus reducing noise.
Second, reduce the impact of the fire pump valve plate on the valve seat and the support member, control the noise
Generally speaking, during the use of the fire pump, if the amount of gas to be inhaled is large, the amount of circulating oil of the fire pump is large, the valve noise will be large, the valve jumps high, the valve area and the valve piece noise are also large. Among them, in the case of noise, there is inevitably a influence of the valve material. For example, the noise of rubber valve should be better than steel or laminate. Therefore, in order to reduce the impact of the fire pump valve plate on the valve seat and the support member, and control the noise, it is possible to select a reasonable valve material, and in addition, pay attention to the control of the oil intake, and also control the noise.
Third, reduce the impact of gas and oil on the oil baffle and other components, control noise
In the case of a fire pump, the rigidity of the part is insufficient or not tightened, and vibration and collision occur, which increases the noise. In order to reduce the noise, the corresponding design improvement can be made where the parts are in contact, such as the use of the rubber to avoid the collision noise caused by the vibration.
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