Analysis on the Effects of Cooling Water Velocity on Temperature Rise of Motorized Spindle

2014 ◽  
Vol 543-547 ◽  
pp. 68-71 ◽  
Author(s):  
Nan Chen ◽  
Ke Zhang ◽  
Li Xiu Zhang ◽  
Yu Hou Wu
Keyword(s):  
Simulation Analysis ◽  
Cooling System ◽  
Cooling Water ◽  
Water Velocity ◽  
Cooling Effect ◽  
Motorized Spindle ◽  
Theoretical Derivation ◽  
Ansys Cfx ◽  
The Difference ◽  
Water Cooling System

In order to obtain the optimal cooling water velocity, the relationship between motor spindle temperature and cooling water velocity was derived by using the heat transfer and fluid mechanics. When the cooling water velocity was relatively small, its change has significantly influence on cooling effect; But when the cooling water velocity was relative large, the difference in cooling effect was inappreciable. Motor spindles water cooling system based on the software of ANSYS CFX was established. The cooling water velocity and temperature distribution in circular channel was analyzed. Motor spindle temperature of theory and simulation was compared under different cooling water velocity; Experiments were conducted according to the results of the simulation, Experimental temperature is consistent with simulation results, which verify the validity of motorized spindle simulation analysis and theoretical derivation. The study in this paper provides a reference for the motorized spindle selecting the rational velocity of cooling water.

Simulation and Analysis for Cooling System of High-Speed Motorized Spindle

2014 ◽  
Vol 945-949 ◽  
pp. 1677-1680
Author(s):  
Chun Li Lei ◽  
Zhi Yuan Rui ◽  
Yin Cheng Zhou
Keyword(s):  
High Speed ◽  
Cooling System ◽  
Water Channel ◽  
Cooling Effect ◽  
Water Cooling ◽  
Motorized Spindle ◽  
Heat Transfer Theory ◽  
Nc Machine ◽  
Manufacturing Accuracy ◽  
Water Cooling System

In order to improve the manufacturing accuracy of NC machine tool, it is crucial to reducing the temperature rise of high-speed motorized spindle. The cooling effect and temperature distribution of water-cooling system are simulated and analyzed based on thermodynamics, heat transfer theory and computational fluid dynamics in this paper. The results show that the cooling system has fine cooling effect; the temperature of cooling liquid is changed from low to high and then to decrease, the highest temperature is at the roundabout of helical water channel and the reason for this phenomenon is found out. The results provide the theory basis for the structure optimization for water-cooling system.

scholarly journals Some Considerations for EM Cooling Systems

1997 ◽  
Vol 5 (6) ◽  
pp. 18-21
Author(s):  
Allan Mitchell
Keyword(s):  
Electron Microscope ◽  
Water Temperature ◽  
Cooling System ◽  
Cooling Water ◽  
Chloride Concentration ◽  
Closed Circuit ◽  
Water Cooling ◽  
High Chloride Concentration ◽  
Local Water ◽  
Water Cooling System

For numerous reasons a closed-circuit water cooling system is the preferred option for providing cooling water to the electron microscope. Cooling water is required by the electron microscope to cool the diffusion pumps and to keep the electronics' and coiumn temperature stable.A closed-circuit water cooling system is essential if the local water supply has a high chloride concentration, has floating particles, is acidic, has a water temperature that fluctuates and is uncontrollable. This potentially leads to specimen drift problems in the TEW, and/or has a water temperature that is very cold. This potentially leads to condensation problems or diffusion pumps not functioning properly in the TEM.

Casing Distortion of GE Frame 3 Gas Turbines

2003 ◽  
Author(s):  
Ryan D. Mitchell ◽  
Henry L. Bernstein ◽  
Peggy L. Talley
Keyword(s):  
Gas Turbines ◽  
Oil And Gas ◽  
Cooling System ◽  
Cooling Water ◽  
Oil And Gas Industry ◽  
Water Systems ◽  
Water Cooling ◽  
Gas Industry ◽  
Turbine Casing ◽  
Water Cooling System

A study of casing distortion in General Electric MS3002 gas turbines used in the oil and gas industry revealed significant distortion for MS3002 Models C through G. The primary distortion problem was ovalization of the turbine casing, which could occur in either the horizontal or vertical directions. Malfunctioning of the water cooling system, or improper disassembly and assembly procedures can cause casing distortion. The MS3002 Models A-G gas turbines have water cooled turbine casings, and malfunctioning of their cooling water systems, regardless of distortion, is also a significant problem.

Numerical Simulation Analysis on the Flow Mechanism of Passive Containment Cooling System

2013 ◽  
Author(s):  
Yang Song ◽  
Wei-Hua Li ◽  
Sheng-Qiang Li
Keyword(s):  
Numerical Simulation ◽  
Stokes Equations ◽  
Simulation Analysis ◽  
Cooling System ◽  
Early Stage ◽  
Three Dimensional ◽  
Cooling Water ◽  
Navier Stokes ◽  
Flow Mechanism ◽  
Three Dimensional Model

In the third generation PWR, passive containment cooling system was one of the key security parts. If accident happened, the blasting valves in the containment would automatically open and the steam would be injected into the containment. When the pressure reached a certain value, the tank on the top of containment would automatically spray. Driven by gravity, the cooling water would flow along outer surface of containment. Steam inside the containment would condense on inner wall and the pressure in the containment would decrease. A numerical simulation of steam jet in the passive containment cooling system was carried out using computational fluid dynamics methods. Flow mechanism in the process was studied. A simplified three-dimensional model of the passive containment cooling system was built. The hexahedral structured mesh was made. The RNG k-epsilon turbulence model was used in solving the transient Reynolds Navier-Stokes equations by the Fluent. The distributions of velocity in containment at different time were acquired. Reference would be provided for understanding of flow mechanism of gas jet-flow in containment during the early stage of accident.

scholarly journals Numerical simulation of thermal diamond filter for working station 1-5 of synchrotron “SKIF“

2021 ◽  
Vol 2119 (1) ◽  
pp. 012130
Author(s):  
V A Vinokurov ◽  
V V Vinokurov ◽  
O A Kabov
Keyword(s):  
Cooling System ◽  
Cooling Water ◽  
Maximum Temperature ◽  
Water Cooling ◽  
System Configuration ◽  
Total Heat Release ◽  
Radiation Heat ◽  
Mini Channels ◽  
Radiation Heat Exchange ◽  
Water Cooling System

Abstract Numerical 3D-simulations of thermal loads of thermal diamond filter for the working station 1-5 of synchrotron “SKIF” has been performed. An efficient version of a water-cooling system of a CVD diamond by means of mini-channels in copper flanges with a total heat release power of 1290 W is presented. The influence of various configurations of the cooling system, different boundary conditions (thermal insulation, radiation heat exchange), water supply pressure on the maximum temperature in diamond wafer has been investigated. The influence of the temperature dependence of the properties of diamond glass has been studied. The maximum temperature on the diamond wafer is found to be 317.6 °C absorbing 1290 W of power correspond to the safe mode for some specific cooling system configuration. The corresponding flow rate of 7 °C cooling water was 13.1 l/min.

scholarly journals Thermoelectric-based cooling system for high-speed motorized spindle I: Design and control mechanism

2021 ◽  
Author(s):  
Fan Kai-Guo ◽  
Jianying Xiao ◽  
Ruoda Wang ◽  
Rui Gao
Keyword(s):  
Heat Conduction ◽  
Heat Generation ◽  
High Speed ◽  
Cooling System ◽  
Cooling Capacity ◽  
Motorized Spindle ◽  
Thermoelectric Refrigeration ◽  
Electric Current Passing ◽  
And Control ◽  
Water Cooling System

Abstract With the increase of spindle speed, heat generation becomes the crucial problem of high-speed motorized spindle. A new cooling system for motorized spindle is proposed based on the principles of thermoelectric refrigeration and fast heat conduction. The main strategy of the proposed ThermoElectric-based Cooling System (TECS) is using the ThermoElectric Cooler (TEC) to cool the spindle through a Heat Conduction Sleeve (HCS). The TEC is designed according to the heat generation of motorized spindle. The cooling capacity generated by the TEC is controlled by electric current passing through the TEC according to the temperature rise of HCS. The HCS is designed to distribute the cold quickly and is installed around the spindle sleeve working as cooling medium. The simulation results show that the cooling effect of the proposed TECS is better than water water-cooling system. It is meaningful to improve the accuracy of motorized spindle.

Design and analysis of a water-cooling system in a new YASA in-wheel motor for electric vehicles

2021 ◽  
pp. 1-12
Author(s):  
Liang Luo ◽  
Jiujian Chang ◽  
Jinglai Wu ◽  
Bo Zhu ◽  
Minyi Zheng ◽  
...  
Keyword(s):  
Cooling System ◽  
Low Cost ◽  
Cooling Effect ◽  
Water Cooling ◽  
Driving System ◽  
Water Path ◽  
Impact Performance ◽  
Fluid Resistance ◽  
Fluid Flow Velocity ◽  
Water Cooling System

Abstract An in-wheel motor, as a key part of an in-wheel driving system, needs to satisfy strict restriction on thermal balance for increasingly high-power density in limited space and weight. Therefore, a new in-wheel motor with an innovative water-cooling system for one newly developed electric vehicle was developed. Based on mechanical structure of the motor, all potential water-cooling layouts were firstly designed with consideration of mechanical strength and manufacturability. A thermal conjugate simulation model of the developed in-wheel motor was then built and its thermally fluid-solid interactions were investigated in this study. All potential water-path layouts of the motor were compared regarding cooling effect and fluid resistance, which impact performance of the motor. Fluid flow velocity and fluid state, determined by the water-path layout, significantly impact cooling effect of the motor. The well-designed water-cooling system significantly reduces motor's temperature at a low cost on required coolant driven pressure which benefits the efficiency of the developed motor. A prototype of the developed motor with the optimal water-path layout was built and tested on the test rig. The developed motor provides outstanding thermal performance.

Precise simulation analysis of the thermal field in mass concrete with a pipe water cooling system

2015 ◽  
Vol 78 ◽  
pp. 449-459 ◽  
Author(s):  
Xinghong Liu ◽  
Chao Zhang ◽  
Xiaolin Chang ◽  
Wei Zhou ◽  
Yonggang Cheng ◽  
...  
Keyword(s):  
Thermal Field ◽  
Simulation Analysis ◽  
Cooling System ◽  
Mass Concrete ◽  
Water Cooling ◽  
Pipe Water ◽  
Precise Simulation ◽  
Water Cooling System

Cooling efficiency and cooling intensity of cooling staves in blast furnace hearth

2019 ◽  
Vol 116 (4) ◽  
pp. 414
Author(s):  
Ke-Xin Jiao ◽  
Jian-Liang Zhang ◽  
Zheng-Jian Liu ◽  
Hai-Bin Jiang
Keyword(s):  
Blast Furnace ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Cooling System ◽  
Cooling Water ◽  
Water Velocity ◽  
Cooling Efficiency ◽  
Furnace Hearth ◽  
Cooling Intensity

The main function of the cooling system is to help preserve the refractory lining for as long as possible, but the evaluation indicators of blast furnace cooling system have not been studied in detail. In the study, the blast furnace cooling system was analyzed in-depth from the perspective of cooling essence and heat transfer principle based on the investigation of many blast furnaces. The concept of cooling efficiency and cooling intensity of the blast furnace hearth cooling system were proposed with quantitative characterization. The results show that the cooling efficiency is 88–99% and the cooling intensity is 70–95% generally. The effect of the cooling water velocity and specific surface area on cooling efficiency and cooling intensity are analyzed from a view of optimizing the design. Improving the specific surface area of cooling system and increasing the cooling water velocity can increase the cooling efficiency and cooling intensity. The specific surface area can be designed to be more than 1.1 and the water velocity should be greater than 1.5 m/s. Finally, the blast furnace operation strategy taken in the actual production process and the methods for improving the cooling intensity and cooling efficiency are assessed.

Experiments of Electronic Water Cooling System on Different Inlet Type and with/without Vortex Fin inside

2014 ◽  
Vol 1051 ◽  
pp. 881-885
Author(s):  
Feng Chin Tsai ◽  
Jen Ching Huang
Keyword(s):  
Heat Generation ◽  
High Power ◽  
Heat Dissipation ◽  
Cooling System ◽  
Cooling Water ◽  
Water Cooling ◽  
Water Cooling System

This study mainly investigates the influence of electronic water cooling system on high power heat generation device at different cooling water inlets with vortex fins or not, hence, heat dissipation experiments are going to carried out on the conditions of three cooling cases: hollow case I, hollow case II and vortex-fin case. From this experiment, it can be seen that the heat dissipation efficiency of hollow case I is reduced by 10% as compared to that of hollow case II, and the heat dissipation efficiency of vortex-fin case is also reduced by 10% as compared to that of hollow case I, that is, water cooling system with vortex-fin has very excellent effect on heat dissipation.

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