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VACUUM ›› 2022, Vol. 59 ›› Issue (5): 63-68.doi: 10.13385/j.cnki.vacuum.2022.05.11

• Vacuum Metallurgy and Thermal Engineering • Previous Articles     Next Articles

Study on Influence of the Change of Inlet and Outlet Angle of Impeller Blade of Vacuum Heat Treatment Furnace on Cooling Efficiency

WANG Gui-peng1, HUANG Yu-xing1, QU Shao-fen2, GAO Guang-wei2, XIE Yuan-hua1, LIU Kun1, BA De-chun1   

  1. 1. School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China;
    2. Shenyang Hengjin Vacuum Technology Co., Ltd., Shenyang 110168, China
  • Received:2021-11-30 Online:2022-09-25 Published:2022-09-28

Abstract: In order to realize the efficient operation of the vacuum heat treatment furnace, this paper takes a certain type of vacuum heat treatment furnace fan as the object, and studies the influence of the inlet and outlet angles of the fan impeller blades on the cooling efficiency. The SST k-ω turbulence model is used to simulate the fan fluid domain. The pressure distribution and velocity vector change in the impeller, the wind speed and wind speed uniformity at the outlet of the fan are analyzed, and the optimized blade entry angle and exit angle parameters are obtained. The impeller before and after optimization are tested to explore the changes of cooling efficiency and energy saving and consumption reduction of vacuum heat treatment furnace. The results show that when the blade inlet angle is 36° and the outlet angle is 54°, the wind speed and wind speed uniformity at the outlet of the fan volute are better, which meet the technological requirements of the vacuum heat treatment furnace. By optimizing the inlet and outlet angles of the fan impeller blades, the performance of the air cooling system of the vacuum heat treatment furnace is significantly improved. The cooling efficiency of the whole machine is increased by 15.6%, and the energy consumption of the whole machine is reduced by 14.3%. For vacuum heat treatment furnaces with a double-side air outlet structure, there will be a local high pressure area in the volute on the side where the outlet is closed, and the impact of the high pressure area on the impeller outlet should be minimized as much as possible.

Key words: vacuum heat treatment furnace, centrifugal fan, blade inlet angle, blade outlet angle, cooling efficiency, numerical simulation

CLC Number: 

  • TG155.16
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