• Title/Summary/Keyword: Drive-shaft

Search Result 242, Processing Time 0.026 seconds

A Study on the Design of Propeller Shaft for Reduction of Torsional Vibration (비틀림짙동 저감을 위한 추진축 설계에 관한 연구)

  • 최은오;안병민;홍동표;정태진
    • Transactions of the Korean Society of Automotive Engineers
    • /
    • v.7 no.7
    • /
    • pp.221-228
    • /
    • 1999
  • A full-time four wheel drive vehicle is driven literally full time by the front and the rear wheels. Front and rear drive shafts are rotated rapidly in the extremely torsional state, which can cause various vibration and noise problems. The purpose of this study is to reduce the vibration and the noise of the full -time four wheel drive vehicle. In this paper, both the causes and the methods for reduction of torsional vibration are suggested. For this study, the characteristics of the torsional vibration are analyzed by free and forced torsional vibration simulation. And this paper described the influence upon the torsional vibration with emphasis shafting system. The validity of simulation models is checked by the field test. The forced vibration simulation with the variations of shaft design factors are performed by the checked models. According to the simulation , the resonance region shifts and the torque fluctuation varies in the system,. Finally, the methods and the effects for the torsional vibration reduction in driveline are proposed.

  • PDF

Strain measurement method for moving parts using IoT sensors (사물인터넷 센서를 이용한 동적 부품의 스트레인 측정 방법)

  • Ba Da Kim;Young Chul An;Jung Hyun Park;Yeong Jun Yu;Chul Hee Lee;Daeyup Lee
    • Journal of Drive and Control
    • /
    • v.20 no.1
    • /
    • pp.41-47
    • /
    • 2023
  • The aim of this study was to develop a method for installing strain gauges on moving, lubricating oil-filled, and sealed parts, such as drive shafts of equipment, including construction machinery. A measuring device was constructed using an embedded CPU and an IoT sensor to measure the strain of the strain gauge, which allowed for the measurement of axial torque and axial force, and subsequent analysis. To verify the performance of the developed device, the axial torque and axial force of the forklift were measured during operation using a strain gauge attached to the inside of the drive shaft. This study confirmed the possibility of measuring and analyzing the strain of a moving part, such as the inside of a drive shaft, which is sealed and filled with hydraulic oil.

Mechatronic Control Model of the Wind Turbine with Transmission to Split Power

  • Zhang Tong;Li Wenyong;Du Yu
    • International Journal of Control, Automation, and Systems
    • /
    • v.3 no.4
    • /
    • pp.533-541
    • /
    • 2005
  • In this paper, a wind turbine with power splitting transmission, which is realized through a novel three-shaft planetary, is presented. The input shaft of the transmission is driven by the rotor of the wind turbine, the output shaft is connected to the grid via the main generator (asynchronous generator), and the third shaft is driven by a control motor with variable speed. The dynamic models of the sub systems of this wind turbine, e.g. the rotor aerodynamics, the drive train dynamics and the power generation unit dynamics, were given and linearized at an operating point. These sub models were integrated in a multidisciplinary dynamic model, which is suitable for control syntheses to optimize the utilization of wind energy and to reduce the excessive dynamic loads. The important dynamic behaviours were investigated and a wind turbine with a soft main shaft was recommend.

Study on Flow Characteristics for Eccentric Shaft in the Butterfly Valve System (축편심 버터플라이 밸브의 유동특성에 관한 연구)

  • Park, S.M.;Choi, H.K.;Yoo, G.J.
    • 한국전산유체공학회:학술대회논문집
    • /
    • 2011.05a
    • /
    • pp.587-591
    • /
    • 2011
  • To improve the performance of the control butterfly valve seals are used to eccentric shaft. In this case, vertical opening gas of the butterfly valve is non-symmetrical, which will change the flow pattern around the valve. In this study, the eccentric drive shaft of the butterfly valve to change flow characteristics are performed numerically. Flow pattern and pressure drop are investigated as the valve opening angle increases for a given mass flow rate. The valve flow coefficient is compared to the without eccentric shaft.

  • PDF

A study on the Design on the Tubular Drive Shaft (중공 드라이브 샤프트의 설계에 관한 연구)

  • Kim, Woo-Kang;Go, Jun-Bin;Kim, Hong-Bae
    • Journal of the Korean Society of Manufacturing Process Engineers
    • /
    • v.8 no.3
    • /
    • pp.7-12
    • /
    • 2009
  • This study aims to find the friction welding and induction harden conditions, which are obtained by welding conditions, and the friction welding characteristics and induction harden conditions of tubular shaft were investigated with respect to low load test, high load test. Friction welding and induction harden machine have been widely used in manufacturing reflects of metal. The material of solid and tubular shaft selected that is used for parts of automobile steel. Such as steel are easy to be machined because of their proper material. As a result I obtained the data of friction welding conditions makes good and the condition of friction and get the tubular condition. The purpose of this study is to find fatigue test condition and induction harden characteristics design for tubular shaft.

  • PDF

Shaft resistance of bored cast-in-place concrete piles in oil sand - Case study

  • Barr, L.;Wong, R.C.K.
    • Geomechanics and Engineering
    • /
    • v.5 no.2
    • /
    • pp.119-142
    • /
    • 2013
  • Pile load tests using Osterberg cells (O-cell) were conducted on cast-in-place concrete piles founded in oil sand fill and in situ oil sand at an industrial plant site in Fort McMurray, Alberta, Canada. Interpreted pile test results show that very high pile shaft resistance (with the Bjerrum-Burland or Beta coefficient of 2.5-4.5) against oil sand could be mobilized at small relative displacements of 2-3% of shaft diameter. Finite element simulations based on linear elastic and elasto-plastic models for oil sand materials were used to analyze the pile load test measurements. Two constitutive models yield comparable top-down load versus pile head displacement curves, but very different behaviour in mobilization of pile shaft and end bearing resistances. The elasto-plastic model produces more consistent matching in both pile shaft and end bearing resistances whereas the linear elastic under- and over-predicts the shaft and end bearing resistances, respectively. The mobilization of high shaft resistance in oil sand under pile load is attributed to the very dense and interlocked structure of oil sand which results in high matrix stiffness, high friction angle, and high shear dilation.

Speed Control Of The Magnet Gear-Based Speed Reducer For Non-contact Power Transmission (비접촉 동력 전달을 위한 마그네트 기어 기반 감속기의 속도 제어에 관한 연구)

  • Jung, Kwang Suk
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.17 no.7
    • /
    • pp.380-388
    • /
    • 2016
  • Using the magnet gear, it is possible to transmit power without mechanical contact. As the drive shaft in a magnet gear-based speed reducer system is isolated from the drive shaft, the system is a two-inertia resonance system that should cope with an external load with the limited air-gap stiffness. On the other hand, the drive shaft or low-speed side is controlled only by the torque of the drive shaft through an air-gap, and the excessive oscillation or the slip can then be generated because of an abrupt disturbance that is different from the general mechanical gear system. Therefore, the disturbance loaded at the low speed side should be measured or estimated, and considered in the control of the driving shaft. This paper proposes a novel full-state feedback controller with a reduced-order observer for the speed reducer system using a magnet gear with a unified harmonic modulator. The control method was verified by simulation and experiment. To estimate the load at the low speed side, a novel observer was designed, in which the new state variable is introduced and the new state equation is formulated. Using a full-state feedback controller including the observer, the test result against disturbance was compared with two D.O.F PI speed controllers. The pole slip was compensated within relatively a short time, and the simulation result about the estimated variable shows a similar tendency to the test result. The test results showed that the magnet gear-based reducer can be applied to an accurate servo system.

A Study on Characteristics of Feed Drive System using High Speed Ballscrew (고속볼스크류를 사용한 이송계 특성에 관한 연구)

  • 박성호
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
    • /
    • 2000.04a
    • /
    • pp.279-284
    • /
    • 2000
  • It can be acquired the high effective productivity through of high speed, precision of machine tools, and then, machine tools will be got a competitive power. Industrially advanced countries already developed that the high speed feed is 60m/min using the high speed ball screw. Also, a lot of problems have happened the feed drive system. It is necessary to study about the character of positioning accuracy, heat generation and high speed control for feed drive system of high speed. in this study, we make use of the feed drive system with a high lead ball screw. We'll develop the feed drive system at the speed of 60m/min. Using the design of the mechanical element and the high speed control, the basic design concept can be established. After manufacturing one-shaft feed drive system and then conducting the performance test, It'll be analyzed properties of the high speed feed drive system.

  • PDF

Design of high speed feed drive system in machine tools (고속화를 위한 공작기계 이송계의 설계)

  • 고해주;박성호;정윤교
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
    • /
    • 1999.05a
    • /
    • pp.39-44
    • /
    • 1999
  • It can be acquired the high effective productivity through of high speed, precision of machine tools, and then, machine tools will be got a competitive power. Industrially advanced countries already developed that the high speed feed is 60m/min using the high speed ball screw. Also, a lot of problems have happened the feed drive system. It is necessary to study about the character of positioning accuracy, heat generation and high speed control for feed drive system of high speed. In this study, we make use of the feed drive system with a ball screw of large-scale-lead. We'll develop the feed drive system at the speed of 60m/min. Using the design of the mechanical element and the high speed control, the basic design concept can be established. After manufacturing one-shaft feed drive system and conducting the performance test, it'll be analyzed properties of the high speed feed drive system.

  • PDF

Design of Adhesive Joints for Composite Propeller Shafts (복합재료 동력전달축의 접착조인트 설계)

  • 김진국;이대길
    • Proceedings of the Korean Society For Composite Materials Conference
    • /
    • 2000.04a
    • /
    • pp.149-153
    • /
    • 2000
  • Substituting composite structures for conventional metallic structures has many advantages because of higher specific stiffness and specific strength of composite materials. In this work, one-piece propeller shafts composed of carbonfepoxy and glass/epoxy composites were designed and manufactured for a rear wheel drive automobile satisfying three design specifications, such as static torque transmission capability, torsional buckling and the fundamental natural bending frequency. Single lap adhesively bonded joint was employed to join the composite shaft and the aluminum yoke. For the optimal adhesive joining of the composite propeller shaft to the aluminum yoke, the torque transmission capability of the adhesively bonded composite shaft was calculated with respect to bonding length and yoke thickness by finite element method and compared with the experimental result. Then an optimal design method was proposed based on the failure model which incorporated the nonlinear mechanical behavior of aluminum yoke and epoxy adhesive. From the experiments and FEM analyses, it was found that the static torque transmission capability of composite propeller shaft was maximum at the critical yoke thickness, and it saturated beyond the critical length. Also, it was found that the one-piece composite propeller shaft had 40% weight saving effect compared with a two-piece steel propeller shaft.

  • PDF