According to some China Borehole Pumps Manufacturers, when the value is one-tenth of the outer diameter of the impeller, the pulsating pressure is the smallest; the outlet edge of the blade is inclined (for example, 20. 2. Increase the number of support bearings of the drive shaft, reduce the support spacing, reduce the shaft length within an appropriate range, appropriately increase the diameter of the shaft, and increase the stiffness of the shaft; when the speed of the pump shaft gradually increases and is close to or an integer multiple of the inherent pump rotorAt the vibration frequency, the pump will vibrate violently. Gap and wearing parts.10 The asymmetric pressure field generated when the impeller rotates due to the factors of the pump itself; the vortex of the suction pool and the inlet pipe; the occurrence and disappearance of the vortex inside the impeller and the volute and the guide vane; the vibration caused by the vortex caused by the half-open valve; due to the impeller blades Uneven outlet pressure distribution caused by a limited number; outflow in the impeller; surge; fluctuating pressure in the flow channel; cavitation; water flowing in the pump body will have friction and impact on the pump body, such as water flow hitting the diaphragm and The leading edge of the guide vane causes vibration; the boiler feed water pump that transports high temperature water is prone to cavitation vibration; the pressure in the pump body is mainly caused by the pump impeller sealing ring, and the gap of the pump body sealing ring is too large, causing large leakage losses in the pump body , The backflow is serious, which will cause the imbalance of the rotor axial force and pressure pulsation, which will increase the vibration. ,The performance will definitely be optimized day by day, and the dynamic performance will be more stable day by day. The frequency is close to or equal to the frequency of an external factor, which will increase the amplitude of the pump. 3. After zui, in order to prevent the pump's amplitude from being too large, measurement and analysis of vibration conditions can also be used to determine the best working parameters of the pump. ②According to some China Borehole Pumps Manufacturers, when the value is one-tenth of the outer diameter of the impeller, the pulsating pressure is the smallest; the outlet edge of the blade is inclined (for example, 20. 2. Increase the number of support bearings of the drive shaft, reduce the support spacing, reduce the shaft length within an appropriate range, appropriately increase the diameter of the shaft, and increase the stiffness of the shaft; when the speed of the pump shaft gradually increases and is close to or an integer multiple of the inherent pump rotorAt the vibration frequency, the pump will vibrate violently. Gap and wearing parts.10 The asymmetric pressure field generated when the impeller rotates due to the factors of the pump itself; the vortex of the suction pool and the inlet pipe; the occurrence and disappearance of the vortex inside the impeller and the volute and the guide vane; the vibration caused by the vortex caused by the half-open valve; due to the impeller blades Uneven outlet pressure distribution caused by a limited number; outflow in the impeller; surge; fluctuating pressure in the flow channel; cavitation; water flowing in the pump body will have friction and impact on the pump body, such as water flow hitting the diaphragm and The leading edge of the guide vane causes vibration; the boiler feed water pump that transports high temperature water is prone to cavitation vibration; the pressure in the pump body is mainly caused by the pump impeller sealing ring, and the gap of the pump body sealing ring is too large, causing large leakage losses in the pump body , The backflow is serious, which will cause the imbalance of the rotor axial force and pressure pulsation, which will increase the vibration. ,The performance will definitely be optimized day by day, and the dynamic performance will be more stable day by day. The frequency is close to or equal to the frequency of an external factor, which will increase the amplitude of the pump. 3. After zui, in order to prevent the pump's amplitude from being too large, measurement and analysis of vibration conditions can also be used to determine the best working parameters of the pump. ②
