Home Journals Articles Updates About
CN
image
收藏切换
The investigation of flow characteristics in Roots vacuum pump with internal return cavity
收藏切换
Jianting LIU1, 2, Yang LI1, 2, Xiaopei LI1, 2, Haiqiang LI1, 2
Fluid Machinery | 2025, 53(1) : 25 - 32
Less
收藏切换
Fluid Machinery | 2025, 53(1): 25-32
The investigation of flow characteristics in Roots vacuum pump with internal return cavity
Full
Jianting LIU1, 2, Yang LI1, 2, Xiaopei LI1, 2, Haiqiang LI1, 2
Affiliations
  • 1Jiangsu XCMG Construction Machinery Research Institute Co., Ltd., Xuzhou 221001, China
  • 2State Key Laboratory of Intelligent Manufacturing of Advanced Construction Machinery, Xuzhou 221001, China
Published: 2025-01-30 doi: 10.3969/j.issn.1005-0329.2025.01.004
Outline
收藏切换

In order to solve gas dynamic noise of Roots vacuum pump due to gas pulsation, return cavity models of four different structures, such as constant rectangular, expanding rectangular, constant depth arc and expanding arc cavities, were designed. The effects of return cavity structure on exhaust pressure, flow rate and internal flow field were analyzed by using the RNG k- εturbulence model and dynamic mesh method, and were verified by experiment. The research results show that the return cavity can increase the pressure of primitives volume in the pump chamber, which effectively suppresses high-pressure gas backflow and improve pressure and flow fluctuation at the outlet. Meanwhile, it can cause lower volumetric flow at inlet. When the inlet pressure is 30~76 kPa, compared with other three return cavities, the fluctuation amplitude of exhaust pressure and flow rate are the lowest at the outlet of constant depth rectangular return cavity (1.31~6.97 kPa and 0.39~1.48 m3/s, respectively). The research results can provide a theoretical basis for noise reduction and structural optimization of the Roots vacuum pump.

Roots vacuum pump  /  return cavity  /  pressure  /  flow rate  /  fluctuation amplitude
刘建停, 李杨, 李晓配, 李海强. 内设回流槽的罗茨真空泵流动特性研究. 流体机械, 2025 , 53 (1) : 25 -32 . DOI: 10.3969/j.issn.1005-0329.2025.01.004
Jianting LIU, Yang LI, Xiaopei LI, Haiqiang LI. The investigation of flow characteristics in Roots vacuum pump with internal return cavity[J]. Fluid Machinery, 2025 , 53 (1) : 25 -32 . DOI: 10.3969/j.issn.1005-0329.2025.01.004
Appendix
Less
Year 2025 volume 53 Issue 1
89
22
Cite this Article
BibTeX
Article Info
doi: 10.3969/j.issn.1005-0329.2025.01.004
  • Receive Date：2024-01-10
  • Online Date：2026-10-15
  • Published：2025-01-30
Article Data
Affiliations
History
  • Received：2024-01-10
  • Revised：2024-05-07
Affiliations
    1Jiangsu XCMG Construction Machinery Research Institute Co., Ltd., Xuzhou 221001, China
    2State Key Laboratory of Intelligent Manufacturing of Advanced Construction Machinery, Xuzhou 221001, China
References
Share
https://castjournals.cast.org.cn/joweb/ltjx/EN/10.3969/j.issn.1005-0329.2025.01.004
Share to
QR

Scan QR to access full text

Cite this article
BibTeX
Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
关闭全屏
  • BibTeX
  • EndNote
  • RefWorks
  • TxT
Links
Articles
Latest Articles
Most Read
Collections
Updates
Events
News
Multimedia
About
About Us
Contact
No. 86 Xueyuan South Road, Haidian District, Beijing
100081
010-62662699(Operation and Technical Support)
qkjq@cast.org.cn

Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House