Thermal analysis of the triple-phase asynchronous motor-reducer coupling system by thermal network method

2020 ◽  
Vol 234 (12) ◽  
pp. 2851-2861
Author(s):  
Mingzhang Chen ◽  
Wuhao Zhuang ◽  
Song Deng ◽  
Chengjie Zhu
Keyword(s):  
Asynchronous Motor ◽  
Experimental Result ◽  
Lubricating Oil ◽  
Power Coefficient ◽  
Element Analysis ◽  
Thermal Network ◽  
Coupling System ◽  
Network Method ◽  
Core Components ◽  
Thermal Network Method

As the core components of mechanical power system, triple-phase asynchronous motor and reducer are required strictly for temperature control. In this paper, the triple-phase asynchronous motor and the reducer are regarded as a coupling system, and thermal network method is used to predict the temperature field distribution of the coupling system. The predicted temperature of the thermal network method is consistent with the experimental result and the finite-element analysis. Furthermore, analysis shows that motor output power, coefficient of friction between teeth and lubricating oil parameters have a great effect on reducing the temperature of the coupling system.

Study on real-time thermal–mechanical–frictional coupling characteristics of ball bearings based on the inverse thermal network method

2021 ◽  
pp. 135065012199356
Author(s):  
Tie-Jun Li ◽  
Meng-Zhuo Wang ◽  
Chun-Yu Zhao
Keyword(s):  
Real Time ◽  
Thermal Contact Resistance ◽  
Thermal Contact ◽  
Time Varying ◽  
Ball Bearings ◽  
The Real ◽  
Thermal Network ◽  
Network Method ◽  
Thermal Network Method ◽  
Coupling Characteristics

The real-time thermal–mechanical–frictional coupling characteristics of bearings are critical to the accuracy, reliability, and life of entire machines. To obtain the real-time dynamic characteristics of ball bearings, a novel model to calculate point contact dynamic friction in mixed lubrication was firstly presented in this work. The model of time-varying thermal contact resistance under fit between the ring and the ball, between the ring and the housing, and between the ring and the shaft was established using the fractal theory and the heat transfer theory. Furthermore, an inverse thermal network method with time-varying thermal contact resistance was presented. Using these models, the real-time thermal–mechanical–frictional coupling characteristics of ball bearings were obtained. The effectiveness of the presented models was verified by experiment and comparison.

Practical Study of Application of Thermal Network Method to Thermal Design of Electronic Equipment: An Example for the Thermal Design of a Compact Self-Ballasted Fluorescent Lamp

2006 ◽  
Author(s):  
Masaru Ishizuka ◽  
Shinji Nakagawa ◽  
Katsuhiro Koizumi
Keyword(s):  
Network Model ◽  
Simulation Method ◽  
Thermal Design ◽  
Fluorescent Lamp ◽  
Simulated Model ◽  
Thermal Network ◽  
Fluorescent Lamps ◽  
Network Method ◽  
Thermal Network Method ◽  
Good Agreement

Thermal design is one of the most important issues in the development of compact self—ballasted fluorescent lamps as the demand for small yet powerful lamps is mounting. This paper proposes a simulation method that is based on a thermal network model for which a set of equations are developed. Some of the coefficients of the thermal network equations were determined experimentally using a simulated model lamp. The calculated temperatures are in good agreement with the measured temperatures. The work illustrates the usefulness of the proposed methodology in the design of compact self—ballasted fluorescent lamps.

Thermal behaviour analyses of gas-insulated switchgear compartment using thermal network method

2016 ◽  
Vol 10 (12) ◽  
pp. 2833-2841 ◽  
Author(s):  
Mariusz Stosur ◽  
Pawel Dawidowski ◽  
Marcin Szewczyk ◽  
Kacper Sowa ◽  
Przemyslaw Balcerek
Keyword(s):  
Thermal Behaviour ◽  
Thermal Network ◽  
Gas Insulated Switchgear ◽  
Network Method ◽  
Thermal Network Method

Temperature Field Analysis of Bearing

2011 ◽  
Vol 480-481 ◽  
pp. 974-979
Author(s):  
Yan Shuang Wang ◽  
Hai Feng Zhu
Keyword(s):  
Temperature Field ◽  
Temperature Distribution ◽  
Rotational Speed ◽  
Axial Load ◽  
Field Analysis ◽  
Effect Of Temperature ◽  
Radial Load ◽  
Thermal Network ◽  
Network Method ◽  
Thermal Network Method

Based on the quasi-static analysis and the power loss analysis, the temperature distribution is calculated by ANSYS.The different part temperatures of bearing are obtained. The influences of rotational speed, axial load and radial load on the temperature distribution are analyzed. The results reveal that axial load and rotational speed affect temperature distribution strongly. The effect of radial load is not signifcant,and the maxtemperature of bearing is at the point between balls and the inner ring. Bearings with shaft are widely used in gyro motors of aviation, aerospace, marine navigational systems. In a few applications, however, heat generated by friction can affects its performance, life and reliability, and consequently influences control precision and life of gyro motors[1]. So it’s important to evaluate heat generation of bearings with shaft for the design, manufacture and its application. A few researchers [2, 3] have analyzed the concentrated contact temperature. Their researches have been mainly focused on the temperature of contact surface. In addition, some researchers (Chinese and foreign) have calculated the temperature of bearing under the thermal network method [4, 5]. The above methods are easy to carry out, but only can the temperatures of some point be found. Compared with the thermal network method, the finite element model can get the temperature of the whole model. The temperature analysis has been pursued by some foreign and Chinese researchers under the method [6, 7]. The steady temperature field of bearing with shaft from a gyro motor is studied in the paper. The speed of ball and the temperature distribution are analyzed and studied by VC6.0++ and ANSYS. The temperature distribution under different axial load, speed of inner ring and radial load is calculated. Therefore the main effect of temperature distribution can be found.

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