AReason Analysis: Any Centrifugal pump has an optimal working range, reflected in the performance curve of the pump. The vibration of the Centrifugal pump varies with the flow rate, and usually its value is minimum near the optimal efficiency point, and increases with the increase or decrease of the flow rate. The variation of vibration with flow rate depends on the energy density, specific speed and cavitation specific speed of the pump. In general, the variation of vibration increases with the increase of energy density, specific speed and cavitation specific speed. In addition to the Centrifugal pump in the performance curve marked on the minimum continuous flow, there is a minimum continuous heat flow. When the pump runs under the condition of small flow rate, the energy of some liquid is changed into heat energy, which makes the temperature of liquid at the inlet rise. Underneath the regular waft charge, the pump’s own computerized balancing disk can balance the axial pressure of the rotor nicely. however, whilst the glide fee is simply too low, due to the growth of the axial pressure, the automated balancing disk can't balance the axial pressure of the rotor, so that the rotor is subjected to an axial force pointing to the path of the impeller population, inflicting the rotor to transport ahead, rotor, stability disc and different components of significant wear. the big deviation among the attitude of incidence of axial medium and the installation attitude of rotor blade may also motive strong vibration. For single-level double-suction pump, while the actual drift price is much less than the designed flow rate, the go-segment location of the volute within the pump frame seems to be too big, in order that the float velocity of the fluid decreases, the absolute pace of the impeller outlet will increase and the direction modifications. in this way, while the liquid inside the volute meets the liquid at the hole of the impeller, the liquid stress within the volute increases because of the impact resulting from the one of a kind pace and path, consequently destroying the axial symmetry of the liquid go with the flow strain in the volute. further, because of the choppy strain distribution in the volute, the fluid in the volute has unique blockading impact on the fluid flowing out of the impeller, which makes the fluid across the impeller exert extraordinary force and route on the impeller and cause polarization. The Solution: Pump operation should be in the priority working area. This work area is in the range of 70%-120% of the flow at the optimum efficiency point of the impeller provided. The rated flow point shall be within the range of 80% ~ 110% of the flow at the optimum efficiency point of the impeller provided. If small go with the flow operation cannot be prevented, a minimal go back line may be drawn from the pump outlet to the pump populace of the container. if it's far saturated liquid, it ought to be cited that the return line can not be directly connected to the pump population, in order not to overheat the export medium heating inlet medium, inflicting cavitation. but, the return of the medium pump to do vain work, increasing the tool energy consumption.Can also be maintained in the case of the identical volute, through converting the impeller parameters to alternate the pump output go with the flow. with the aid of modifying the inlet and outlet angles of the impeller, the radial pressure appearing on the impeller may be decreased and the vibration may be reduced.