Research on Unsteady Radial Force of Multi-stage Deep-sea Electric Pump

doi:10.3901/JME.2021.22.406

Abstract

Abstract: Aiming at the fault types of unbalanced vibration, an unbalanced fault simulation test bed based on electromagnetic driven automatic balancer is built. The principle and design method of self-locking and driving of balanced weight block with electromagnetic driven automatic balance device are studied. The influencing factors of control limit are analyzed according to the design conditions. The maximum balance capacity, minimum balance capacity and balance precision of the automatic balance system are calculated. A set of stable driven automatic balancing device is designed. The rotor diagnosis model of unbalanced vibration fault is established. The mechanism of unbalanced vibration is analyzed theoretically. The method of axis trajectory reconstruction is proposed to identify unbalanced vibration. The vibration vector of horizontal direction, vertical direction and ellipse long axis are used as the input signals of automatic balance control, and the results are verified on the automatic balance test bench. The results demonstrate that under the same conditions, vibration can be reduced by the electromagnetic driven self-balancing device with three signal inputs. Compared with the traditional single-channel horizontal and vertical control input, the control effect of the elliptic long-axis vector proposed by the reconstruction method is better, with a decrease of 74.84%, which is about 5% more than the other two methods.

Key words: deep-sea electric pump, unsteady radial force, numerical simulation, hydraulic performance test

CLC Number:

TH311

KANG Yajuan, LIU Shaojun, JIANG Yongming. Research on Unsteady Radial Force of Multi-stage Deep-sea Electric Pump[J]. Journal of Mechanical Engineering, 2021, 57(22): 406-415.

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