scholarly journals Vibration Test and Shock Absorption of Coal Crusher Chambers in Thermal Power Plants (I): Field Test and Assessment

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Lihua Zhu ◽  
Hanquan Yuan ◽  
Haoyi Zhou ◽  
Dong Jiang ◽  
Baoquan Liu ◽  
...  
Keyword(s):  
Power Plants ◽  
Vibration Isolation ◽  
Thermal Power ◽  
Vibration Test ◽  
Thermal Power Plants ◽  
Test Results ◽  
Vibration Displacement ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Vibration Performance

A field vibration test was conducted on the coal crusher chamber of a thermal power plant to evaluate its vibration performance. The vibration displacements and velocities of the structure, coal crusher body, and vibration-isolation platform were tested. The vibration safety of the coal crusher chamber and the vibration-isolation efficiency of the spring vibration-isolation system were evaluated based on the test results, and the reason the vibration exceeded the limit was analyzed. This study showed that the vibration displacement of a coal crusher with a spring vibration-isolation system met the code requirements, but the equipment had greater vibration displacements, which were related to the connection between the equipment and the platform. Compared to a steel platform, the vibration displacement of a concrete platform was smaller, and the vibration-isolation efficiency was greater. The vibration displacements of the coal crusher body could be reduced by controlling the vibration displacements of the platform.

Vibration Test and Analysis on Medium-Speed Mill-Foundation Coupled System

2012 ◽  
Vol 166-169 ◽  
pp. 530-533
Author(s):  
Bin Xu ◽  
Zhi Feng Peng ◽  
Fang Liu ◽  
Yi Liang Peng ◽  
Feng Jian Zhang
Keyword(s):  
Power Plants ◽  
Thermal Power ◽  
Coupled System ◽  
Vibration Test ◽  
Thermal Power Plants ◽  
Test Results ◽  
Vibration Displacement ◽  
Medium Speed ◽  
Vibration Performance

To evaluate the vibration performance of medium-speed mill-foundation coupled system, eight mills in five thermal power plants were tested in site. The vibration displacement and acceleration of upper and lower bedplates of foundations and equipment bodies were measured. According to the test results, the vibration safety of mills is evaluated. The study shows that the vibration displacement of medium-speed mill with spring vibration-isolated foundation meets the code requirements, but the vibration displacement of equipment body is larger. The vibration displacement of equipment body should be controlled by limiting the vibration displacement of foundation platform in design.

Simulation on Vibration Isolation System for Vibratory-Drum Test Stand

2013 ◽  
Vol 365-366 ◽  
pp. 351-355 ◽  
Author(s):  
Zhi Feng Zhang ◽  
Hui Gan Xu ◽  
Xian Ning Kong ◽  
Yun Shi Yao
Keyword(s):  
Vibration Isolation ◽  
Performance Test ◽  
Simulation Analysis ◽  
Test Stand ◽  
Test Field ◽  
Test Results ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Rubber Tire ◽  
Vibration Performance

the reliability and vibration performance test of vibratory rollers have been done in the test field to ensure that the vibratory roller meet the quality requirement. At present, the indoor test stand for vibratory roller has not yet been studied at home and abroad. This paper designs the indoor test stand for vibratory roller and makes simulation analysis by the numerical model of vibration-drum and test stand. The vibration isolation system of test stand is determined as a function of the test stand mass (m2), the stiffness of rubber tire (k1) and the stiffness of the vibration isolation block (k2). The test results showed that the vibration drum-test stand model can account for the vibration isolation system.

scholarly journals Vibration Test and Shock Absorption of Coal Crusher Chambers in Thermal Power Plants (II): Numerical Analysis

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Hanquan Yuan ◽  
Lihua Zhu ◽  
Haoyi Zhou ◽  
Dong Jiang ◽  
Baoquan Liu ◽  
...  
Keyword(s):  
Power Plants ◽  
Vibration Isolation ◽  
Design Method ◽  
Thermal Power ◽  
Element Model ◽  
Dynamic Coefficient ◽  
Test Results ◽  
Vibration Isolator ◽  
Shock Absorption ◽  
Vibration Displacement

The coal crusher generates large vibrations when crushing coal blocks, which can affect the equipment itself, as well as the safety of the structure. In order to study the dynamic characteristics of coal crusher, a finite element model of the coal crusher chamber in the Shangluo power plant was built by using ABAQUS. Firstly, modal and harmonic response analyses were conducted, and the comparison shows that the numerical results are basically in accordance with the test results. Then, shock absorption research was performed using a parametric analysis that included the stiffness and position of the spring vibration isolator, the mass, and material of the vibration-isolation platform. Finally, the dynamic coefficient of a coal crusher was discussed. The results showed that, compared with the stiffness of the spring vibration isolator, the mass of the vibration-isolation platform had more influence on the vibration displacement of the coal crusher. To achieve better vibration isolation, the concrete platform is suggested, and the eccentricity of the spring vibration isolator should not exceed 5%. When static design method is adopted to calculate the bearing capacity of the supporting structure subjected to the dynamic load of the coal crusher, the dynamic coefficient of a coal crusher is suggested as 1.5.

Dynamic Research and Design on SINS Damping System in Vehicle

2011 ◽  
Vol 328-330 ◽  
pp. 1679-1683
Author(s):  
Jie Li ◽  
Rui Ping Tao ◽  
Jun Liu ◽  
Wei Chen
Keyword(s):  
Vibration Isolation ◽  
Inertial Navigation ◽  
Vibration Damping ◽  
Test Results ◽  
Characteristic Analysis ◽  
Isolation System ◽  
Vibration Isolation System ◽  
System Vibration ◽  
Research And Design ◽  
Damping Model

For the vibration noise problem of strap-down inertial navigation system in the vehicle, a better vibration damping system was designed. Based on the vibration characters of the vehicle environment, a vibration damping model fitted the SINS in the vehicle was presented; and then the mechanism of vibration damping system was designed especially; and then the design of vibration damping system was verified by using of the dynamic characteristic analysis, On the basis of the above analysis, the overall structure of actual vibration isolation system was built, and then the test for the vibration isolation system was made, the results show that the micro-isolation system for the SINS system vibration and noise has a better inhibition effect, and the applicability and the dependability of the vibration damping system is verified by the test results, which provides reference basis for the design of the strap-down inertial navigation damping system in the land vehicle and provides techniques for the better application of SINS in other fields.

STUDY OF THE VIBRATION ISOLATION SYSTEM OF MARINE POWER PLANTS WITH A 5AL 25/30 DIESEL DRIVE

Akustika ◽  
2021 ◽  
pp. 112
Author(s):  
Minas Minasyan ◽  
Armen Minasyan ◽  
Kyaw Thet Naing
Keyword(s):  
Experimental Study ◽  
Diesel Engine ◽  
Power Plants ◽  
Vibration Isolation ◽  
Field Studies ◽  
Absorption System ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Vibration Isolators ◽  
The Impact

The article is devoted to the study of the support and side stop vibration isolation system of two marine power plants DGA- 500 with a 5AL 25/30 drive diesel engine, in which a hypothesis is put forward about the imperfection of the shock absorption system. The purpose of the research is to substantiate the imperfection of the support and side stop vibration isolation system of marine power plants with a 5 AL 25/30 drive diesel engine. The confirmation of this hypothesis and the achievement of this goal is justified on the basis of presentation of the results of field studies on the project’s courts B437/11 and the personal presence during the preparation of DGA-500 to repair at the shipyard. For the use of unbalanced engines as a drive for ship power plants, the authors, on the basis of a full-scale experimental study and analysis of known works, recommend initially assessing the possibility and purpose of depreciation of the unit according to the Katz unbalance criterion [1]. The objective of fixing the unit with diesel 5AL 25/30 on the criterion of imbalance Katz is soundproof, and the calculation of depreciation should be based on the impact of side stop vibration isolators. A significant improvement is recommended to the support 36-40 and side stop 41-52 vibration isolation system, elastic pipe fittings 8, support frame 2 and turbocharger bracket 4 (Fig. 1).

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