한국생산제조학회 학술지 영문 홈페이지

Current Issue

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 29 , No. 4

[ Papers ]
Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 29, No. 4, pp.296-304
Abbreviation: J. Korean Soc. Manuf. Technol. Eng.
ISSN: 2508-5107 (Online)
Print publication date 15 Aug 2020
Received 11 Jun 2020 Revised 29 Jun 2020 Accepted 06 Jul 2020
DOI: https://doi.org/10.7735/ksmte.2020.29.4.296

압축 공기를 사용한 소형 이젝트의 진공 흡입 성능 평가 요인에 관한 연구
김준현a ; 배현우b ; 성재용c, *

Factors Affecting Vacuum Suction Performance of a Compact Ejector Using Compressed Air
Joon Hyun Kima ; Hyunwoo Baeb ; Jaeyong Sungc, *
aNDT Research Center, Seoul National University of Science & Technology
bGraduate School, Department of Mechanical Engineering, Seoul National University of Science & Technology
cDepartment of Mechanical and Automotive Engineering, Seoul National University of Science & Technology
Correspondence to : *Tel.: +82-2-970-6398 E-mail address: jysung@seoultech.ac.kr (Jaeyong Sung).

Funding Information ▼

Abstract

This study analyzed the internal flow structure of a small ejector and the major design factors that affect suction force. The ejector had a limited total length of 45 mm, and the primary nozzle had a diameter of 1 mm. This study investigated the effect of the main parameters on optimum nozzle opening ratio based on injection flow as well as the influence of the mixing chamber design on vacuum suction performance. The second nozzle had a significant effect when the diameter was 18 mm. Other parameter values were studied to identify design elements that determine the shape of the mixing chamber. The effect of the pad opening gap and the change in ambient pressure on the control state of the inflow ratio and the possibility of non-contact gripping were also examined.


Keywords: Contact gripper, Ejector, Venturi nozzle, Suction, Vacuum chamber

Acknowledgments

이 연구는 서울과학기술대학교 교내연구비의 지원으로 수행되었습니다.


References
1. El-Zahaby, A. M., Hamed, M. H., Omara, Z. M., Eldesoukey, A. M., 2017, Study of the Configuration and Performance of Air-Air Ejectors Based on CFD Simulation, Journal of Aeronautics & Aerospace Engineering, 6:4 1-9.
2. Allouche, Y., Bouden, C., Varga, S., 2014, A CFD Analysis of the Flow Structure Inside a Steam Ejector to Identify the Suitable Experimental Operating Conditions for a Solar-Driven Refrigeration System, International Journal of Refrigeration, 39 186-195.
3. Wang, X-J., Tang, L., Jiang, J., 2014, Numerical Simulation of Venturi Ejector in Yellow Phosphorus Purification System, Nuclear Engineering and Design, 264 18-23.
4. SMC, n.d., viewed 14 Nov. 2019, Web catalogue, <http://www.smckorea.co.kr/>.
5. Kim, J. H., Lee, S-J., 2015, Configuration of Noncontact Grip System for Carrying Large Flat Sheets Using Vacuum Air Heads, Journal of Tribology, 137:4 041103.
6. Kim, J. H., Sung, J., 2019, Influence of Air Head Shape on Lifting Force and Stability of Swirl Flow in a Vortex-Type Non-Contact Gripper, Journal of the Korean Society of Manufacturing Technology Engineers, 28:4 224-231.
7. Savkiv, V., Mykhailyshyn, R., Duchon, F., Fendo, O., 2017, Justification of Design and Parameters of Bernoulli-Vacuum Gripping Device, International Journal of Advanced Robotic systems, 1-10.
8. Schaller, J., Vopat, R. B., 2014, Venturi Assisted Gripper, US Patent: 8.777.284 B2.
9. Shin, D., Yu, I., Shin, M., Oh, J., Ko, Y., Kim, S., 2019, A Numerical Analysis on Performance of Parallel Type Ejector for High Altitude Simulation, Journal of the Korean Society of Propulsion Engineering, 23:1 52-60.
10. Tashtoush, B. M., Al-Nimr, M. A., Khasawneh, M. A., 2019, A Comprehensive Review of Ejector Design, Performance, and Applications, Applied Energy, 240:15 138-172.
11. Myotoku Ltd, n.d., viewed 3 Oct.2019, Convum, <http://convum.co.jp/>.
12. Shah, A., Chughtai, I. R., HameedInayat, M., 2014, Experimental and Numerical Investigation of the Ejector of Mixing Section Length on Direct-Contact Condensation in Steam Jet Pump, International Journal of Heat and Mass Transfer, 72 430-439.

Joon Hyun Kim

Research Professor in NDT Research Center, Seoul National University of Science and Technology.His research interest is Tribology.

E-mail: joonk61@seoultech.ac.kr

Hyunwoo Bae

Ph.D. candidate in the Department of Mechanical Engineering, Seoul National University of Science and Technology.His research interest is Fluid Mechanics.

E-mail: bhw0369@naver.com

Jaeyong Sung

Professor in the Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology.His research interest is Flow Visualization.

E-mail: jysung@seoultech.ac.kr