Factors causing severe vibration in acid-alkali resistant self-priming pumps! ~

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Due to the special design of the pump casing in acid- and alkali-resistant self-priming pumps, their sealing performance is much higher than that of ordinary centrifugal pumps. Importantly, the water inside the pump casing does not drain automatically when the motor stops operating. As the motor drives the turbine to rotate at high speed, a negative pressure (vacuum) is quickly created inside the pump, allowing atmospheric pressure to push water into the pump casing; this, in turn, contributes to the pumping capacity of the pump. Therefore, after a single filling, the self-priming pump does not need to be refilled every time like ordinary centrifugal pumps, **which reduces the labor intensity and makes it more convenient to use. Reasons for severe vibration in acid- and alkali-resistant self-priming pumps: 1. Hydraulic factors – Uneven inlet flow velocity and pressure distribution in acid- and alkali-resistant self-priming pumps, pressure fluctuations of the working fluid at the pump’s inlet and outlet, fluid bypassing, deviation from the normal flow path, and fluid separation from the pump surface. Operating conditions that are not within the specified parameters, as well as cavitation in the pump caused by various factors, are all common causes of vibration in such pumps. Dynamic transition processes such as the start-up and shutdown of water pumps, the opening and closing of valves, changes in operating conditions, and emergency shutdowns in case of accidents, which cause sudden pressure changes in the water conveyance pipes and water hammer effects, often also lead to vibration in the pump house and the pumping units. 2. Electrically, the acid- and alkali-resistant self-priming pump motor is the main component of the unit; electrical imbalances within the motor and defects in other electrical systems often cause vibration and noise. For example, in an asynchronous motor during operation, the radial alternating electric tension between the stator and rotor generated by the interaction of the harmonic magnetic fluxes of the stator and rotor teeth, or in a large synchronous motor during operation, situations such as misalignment of the magnetic centers of the stator and rotor or air-gap differences in various directions exceeding the allowable limits, can all cause periodic vibration of the motor and the generation of noise. Check whether the three phases are balanced while the motor is running, and verify whether the power frequency is stable. The common faults and troubleshooting methods for acid-alkali resistant self-priming pumps generally include the following aspects: 1. The performance of the acid-alkali resistant self-priming pump does not meet the requirements. 2. Parts are damaged or there are foreign objects inside the water pump. 3. The installation and use of the acid-alkali resistant self-priming pump are incorrect. 4. Poor water intake conditions for acid-alkali resistant self-priming pumps