• Title/Summary/Keyword: 피스톤 관성력

Search Result 3, Processing Time 0.022 seconds

Use of dynamic absorber for reduction of shaft vibration in diesel engines of ship (축계진동 저감을 위한 동흡진기의 제안)

  • Park, Sok-Chu;Park, Kyung-Il;Kim, Jeong-Ryul
    • Journal of Advanced Marine Engineering and Technology
    • /
    • v.40 no.9
    • /
    • pp.743-748
    • /
    • 2016
  • Ship's diesel engines have intrinsic problem to make vibrations caused by cylinder explosion and unbalanced rotating mass. These vibrations might induce noises, are transferred to hull and neighboring structures and cause secondary vibrations. This paper suggests the use of an additional dynamic absorber with a sub-vibration system to reduce the aforementioned vibrations. This dynamic absorber is designed based on an analysis of the free vibration of the engine shafting system and the forced vibrations.

Dynamic Analysis Design of Balance Shaft for Reducing Engine Inertia Force and Pitching Moment (엔진 관성력과 피칭모멘트 저감을 위한 밸런스샤프트의 동역학 설계)

  • Kim, Byeong Jun;Boo, Kwang Suk;Kim, Heung Seob
    • Journal of the Korea Convergence Society
    • /
    • v.13 no.4
    • /
    • pp.307-313
    • /
    • 2022
  • The importance of engine vibration reduction is increasing as the vehicle interior noise becomes more serious due to higher output and lighten weight trends. Recently, the balance shaft attachment has been proposed as a representative method for the engine vibration reduction. The balance shaft is a device that cancels the vibrations generated in the reciprocating motion of the piston and the conrod by using an arbitrary eccentric mass, and can improve fuel efficiency and ride comfort at the same time. This paper proposes the unbalance amount and shape of the balance shaft to induce and offset the inertia force generated by the engine structure. The proposed two-shaped balance shaft was implemented as an ADAMS multi-body dynamics model, and the reduction of the inertial force in the actual behavior was confirmed through dynamic simulation.

A Study on the Swash Plate Behavior of Variable Displacement Compressor for Automotive Air Conditioning System (차량용 가변용량 압축기의 사판 거동에 관한 연구)

  • Lee, Tae-Jin;Lee, Geon-Ho
    • Proceedings of the KSME Conference
    • /
    • 2004.11a
    • /
    • pp.1335-1340
    • /
    • 2004
  • Due to the distinct advantages of comfort, drive ability and fuel economy standard, the variable displacement swash plate type compressor which can control the compressor displacement by increasing or reducing the swash plate angle has been developed for automotive air-conditioning system. That can be obtained constant temperature of car room on the variation cooling capacities or engine speeds. This paper was carried out the analysis of swash plate behavior to obtain the forces and moments applied to the swash plate and to get the variable controlability on the variation of compressor speeds and swash plate chamber pressures. The results of simuation agree very well with the experimental data.

  • PDF