METHOD FOR DETERMINING THE NOISE CHARACTERISTIC OF AN ELECTRIC PUMP Russian patent published in 2021 - IPC F04B51/00 

FIELD: pumps.

SUBSTANCE: invention relates to pump building, in particular, to methods for determining the noise characteristic of an electric pump. A method for determining the noise characteristic of an electric pump by installation and testing thereof on a water-filled stand containing a sealed tank, suction and injection pipelines with throttle valves, connected with the tank, instrumentation and control equipment used for setting the operation mode of the pump whereon the sound pressure level is measured directly in the pump. Additionally, the levels of sound pressure are measured in the tank both by the overall level and in the octave frequency range, wherein, if the value of the overall level of sound pressure in the tank L_t in dB is more than the overall level of sound pressure in the pump L_p in dB, similar tests should be conducted at different levels of water in the tank: upper H_up=4/5 H₀, nominal H_nom=3/5 H₀, lower H_low=2/5 H₀ and minimum H_min=1/5 H₀, wherein H₀ is the distance from the upper edge of the suction pipeline in the tank to the top of the tank, maintaining the pressure at the inlet of the pump constant, wherein such operation mode of the pump, wherein L_t<L_p and L_p is the minimum of all possible levels of water in the tank, will be considered optimal.

EFFECT: claimed invention is aimed at reducing the noise characteristic of the tank and the influence thereof on the noise characteristic of the electric pump and determining the noise characteristic of the electric pump, close to the objective characteristic, when testing said pump on a stand.

3 cl, 1 dwg