Investigation on Vibration Characteristics in a Centrifugal Pump with Special Slope Volute

Abstract

Vibration is one of the main problems which should be considered seriously in designing and operating a centrifugal pump. In this paper, a special slope volute was proposed to reduce vibration level of centrifugal pump. The goal of this paper was to analyze vibration characteristics of slope volute pump and provide a new method to reduce vibration energy in centrifugal pump. Experiments were carried out to obtain vibration signals at different flow rates of slope volute pump, which were compared with conventional spiral volute pump. Results show that vibration level is closely related to flow structure interior pump. At low flow rates, especially, vibration energy increases rapidly with the onset of rotating stall. Rotor-stator interaction mechanism changes when adopting slope volute. In slope volute pump, the peaks in power spectra correspond to different harmonics of BPF at three measuring directions; however, in spiral volute pump, the predominant components always correspond to 2 BPF . From comparison of vibration level in different frequency bands, it is found that vibration level of slope volute pump is smaller than conventional spiral volute pump. So vibration energy of centrifugal pump can be reduced effectively using slope volute.

Investigation on vibration of Centrifugal Pump by Bearing supported position

“…Studies have been carried out on vibration of pumps in terms of structure by scholars. Zhang et al [1] proposed a special slope volute to reduce vibration level of pump and vibration characteristics of model pump were measured, which were compared with conventional spiral volute pump. And result was presented that vibration energy of conventional spiral volute pump is much large than slope pump at different working conditions in their works.…”

Analysis of vibration signals produced by the cavitation in centrifugal pumps using the Power Spectrum and Continuous Wavelet Transform

“…In this system, the classification fuzzy rules and membership functions were created using the statistical parameters extracted from vibration signals. Zhang et al (2014) have investigated the vibration characteristics of centrifugal pumps by the measuring of the signals with several accelerometers placed on the pump. Hence, they analyzed the vibration signals in three directions by means of the Root Mean Square Method or vibration energy due to the pump cavitation.…”

Investigation of effect of pump rotational speed on performance and detection of cavitation within a centrifugal pump using vibration analysis

“…These studies are by Zhang et al. [19] which studied the vibration features in centrifugal pump that has a special slope in the volute. In their work, they have proposed and analysed vibration characteristics in the pump with a special slope volute to decrease the vibration and offer a new technique to decrease vibration level in the pump.…”