Field Dynamic Balancing for Rigid Rotor-AMB System in a Magnetically Suspended Flywheel

2016 ◽  
Vol 21 (2) ◽  
pp. 1140-1150 ◽  
Author(s):  
Chao Liu ◽  
Gang Liu
Keyword(s):  
Rigid Rotor ◽  
Dynamic Balancing ◽  
Field Dynamic ◽  
Amb System ◽  
Field Dynamic Balancing

scholarly journals Research on the Field Dynamic Balance Technologies for Large Diesel Engine Crankshaft System

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Shihai Zhang ◽  
Zimiao Zhang
Keyword(s):  
Diesel Engine ◽  
Field Experiments ◽  
Vibration Signal ◽  
Least Square Method ◽  
Least Square ◽  
Influence Coefficient ◽  
Dynamic Balancing ◽  
Field Dynamic ◽  
Engine Crankshaft ◽  
Field Dynamic Balancing

In order to reduce the unbalancing mass and the accompanying unbalancing vibration of diesel engine crankshaft system, the field dynamic balancing method and its key technologies are presented in the paper. In order to separate the unbalancing vibration signal from the total vibration signal of crankshaft system, the fundamental frequency signal fitting principle based on the least square method was introduced firstly, and then wavelet noise reduction method was applied to improve the signal fitting precision of least square method. Based on the unbalancing vibration signal analysis and assessment of crankshaft system, the influence coefficient method was applied to calculate the value and phase of the equivalent unbalancing mass in flywheel. To easily correct the unbalancing condition of crankshaft system, the unbalancing adjustment equipment was designed based on the flywheel structure. The balancing effect of field dynamic balancing system designed for the large diesel engine has been verified by field experiments.

Research on the Field Dynamic Balancing Technology and Instrument for a High Speed Cantilever Rotor

2014 ◽  
Vol 633-634 ◽  
pp. 1220-1228
Author(s):  
Zhi Xin Zhang ◽  
Yu Long Fu ◽  
Shi Zheng He ◽  
Ji Yong Kuang
Keyword(s):  
High Speed ◽  
Experimental Results ◽  
Dynamic Balancing ◽  
Signal Process ◽  
Low Speed ◽  
Full Speed ◽  
Field Dynamic ◽  
Field Dynamic Balancing

The principle of balancing a high speed cantilever rotor at full speed has been put forward by low-speed and high-speed balancing. The portable field dynamic balancing instrument based on the microcontroller is discussed from the hardware, the software and the signal process in detail. With the developed instrument, the whole-machine balancing experiment was conducted on a saucer-separating centrifuge RJ-460. The vibration of the saucer-separating centrifuge decreased from 3.8mm/s to 0.3mm/s at 1200r/min and decreased from 9.8mm/s to 0.6mm/s at 7200r/min. The experimental results indicated that the principle of balance is correct and the designed instrument is reliable and promising.

Dynamic Characteristics of Scraper-Discharge Material Centrifuge

1991 ◽  
Author(s):  
Hong Weirong ◽  
Zhou Baotang ◽  
Hu Shizheng ◽  
V. Kamala ◽  
T. S. Sankar
Keyword(s):  
Differential Equation ◽  
Dynamic Characteristics ◽  
Critical Speed ◽  
Center Of Gravity ◽  
Rotor System ◽  
Experimental Results ◽  
Analysis Method ◽  
Dynamic Balancing ◽  
Plane Field ◽  
Field Dynamic

Abstract This paper deals with the dynamic characteristics of scraper-discharge material centrifuge. The bowl center of gravity and the critical speed of rotor system have been calculated. Both One- and Two-plane field dynamic balancing methods suitable for this type of centrifuge are nalyzing. The design of isolator used with this type of centrifuge is also discussed since severe vibrations have developed during the operation. In traditional isolator design, transmissibility is obtained by extracting root of the differential equation for the multi-degree freedom system which is an elaborate method. In this paper, the transmissibility is obtained by the impedeance analysis method. The calculations are simple and agree well with the experimental results.

Rigid Rotor Dynamic Balancing by Two-Plane Correction with the Influence Coefficient Method

2013 ◽  
Vol 365-366 ◽  
pp. 211-215 ◽  
Author(s):  
Xiang Xu ◽  
Ping Ping Fan
Keyword(s):  
Dynamic Balance ◽  
Balance Model ◽  
Inertia Force ◽  
Influence Coefficient ◽  
Rigid Rotor ◽  
Dynamic Balancing ◽  
Balance Test ◽  
Influence Coefficient Method ◽  
Rotor Dynamic ◽  
Coefficient Method

A rigid rotor dynamic balance model was established to analyze the vibration form of a rigid rotor under unbalance inertia force. The principle of two-plane correction with the influence coefficient method had been conducted, and the principle of the cross-correlation method calculating amplitude and phase of unbalance vibration signal was introduced. The method was found to be effective and practical. A dynamic balance test program was performed on a rigid rotor vibration simulation instrument and a dynamic balancing analyzer based on LabVIEW, which showed that rigid rotor dynamic balancing by two-plane correction with the influence coefficient method could satisfy the performance and required precision.

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