• 제목/요약/키워드: gearbox transmission

검색결과 52건 처리시간 0.021초

주파수 응답해석을 통한 풍력발전기용 기어박스의 동특성해석 (Vibration Analysis of wind turbine gearbox with frequency response analysis)

  • 박현용;박정훈
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2010년도 추계학술대회 초록집
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    • pp.178.2-178.2
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    • 2010
  • The wind turbine gearbox is important rotating part to transmit torque from turbine blade to generator. Generally, gear shaft which rotates causes vibration by influence of stiffness and mass with gear shaft. Root cause of this vibration source is well known to gear transmission error that is decided from gear tooth property. Transmission error excites a gear, and makes excitation force that is vibrated shaft. This vibration of shaft is transmitted to gearbox housing through gearbox bearing. If the resonance about which the natural frequency of the gearbox accords with shaft exciting frequency occurs, a wind turbine can lead to failure. The gearbox for wind turbine should be considered influence of vibration as well as the fatigue life and its performance by such reason. The cause to vibration should be closely examined to reduce influence of such vibration. In this paper, the cause of the vibration which occurs by a gearbox is closely examined and the method which can reduce the vibration which occurred is shown. It is compared with vibration test outcome of a 3MW gearbox for verification of the method shown by this paper.

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변속기 케이스에서 발생하는 방사소음 해석 및 저감 설계 (Analysis of the Sound Radiation of Transmission Gearbox Housing and Reduction Design)

  • 정성영;오하영;박준홍;박경진;이현아;최중선
    • 한국소음진동공학회논문집
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    • 제20권6호
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    • pp.521-527
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    • 2010
  • This article presents a method to calculate the sound radiation of transmission gearbox housing by using Helmholtz integral. Rayleigh integral is used to verify the method. Half-space radiation is considered because the actual gearbox housing is on hard place like concrete. For optimization, orthogonal array is used as a fractional factorial design method. Sound Radiation is calculated with simple source like plate and sphere shape, then actual gearbox BEM model is applied to the method.

2.5MW 풍력발전기 기어박스 치형수정 (Gear Teeth Modification for a 2.5MW Wind Turbine Gearbox)

  • 이형우;강동권
    • 한국생산제조학회지
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    • 제23권2호
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    • pp.109-117
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    • 2014
  • This paper reports a method to modify the gear tooth profile of a wind turbine gearbox to reduce the noise caused by the impact of the gear teeth. The major causes of tooth impact are the elastic deformation of the gear teeth, shafts, and case of the gearbox under loading, and the fabrication tolerances in gear manufacturing. In this study, the tooth profile was modified considering the elastic deformation of the gear tooth and the tooth lead modification to compensate for tooth interference in the lead direction as a result of shaft deformations. The method was applied to the gearbox of a 2.5MW wind turbine, and the transmission error was characterized before and after modifying the gear teeth. For the modified gear teeth, the transmission error (67.6%) was lower by 17.8%. Additionally, the gear contact stress was reduced by 6.3%, to 22.3%.

5속 수동 트랜스미션의 전달오차 예측에 관한 연구 (Study of the Transmission Error Prediction of a Five-speed Manual Transmission System)

  • 조상필;이동규;김래성;허철수;류성기
    • 한국기계가공학회지
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    • 제15권2호
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    • pp.66-71
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    • 2016
  • For the manual transmission gearbox used in the automotive industry, gear meshing transmission error is the main source of noise known as gear whine, and radiated gear whine noise plays an important role in the whole gearbox. Therefore, in order to keep competitive in the automotive market, the NVH performance of transmission gearboxes is increasingly important for automotive manufacturers when a new product is developed. In this paper, in order to achieve an optimized tooth contact pattern, gear tooth modification is applied to make up for the deformation of the teeth owing to load. A five-speed MT gearbox is firstly modeled in RomaxDesign software and the prediction of transmission error under the loaded torques is studied and compared. From the simulation, the transmission error and maximum contact stress are also simulated and compared after tooth modification of the loaded torques. Finally, the simulation results are used to optimize the whole gearbox design and the final gearbox prototype is testified to obtain NVH performance in a semi-anechoic room.

대차용 감속구동장치 시험ㆍ평가 기술개발 (Development of Test method and Evaluation technology of reduction gearbox for Korea High-speed Train)

  • 이동형;최경진;서정원;강부병;박순원
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2000년도 추계학술대회 논문집
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    • pp.258-264
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    • 2000
  • This study is to establish test method and evaluation technology of drive system appropriate to high speed train. The transmission system of high speed train serve in the severe condition compared with those of other trains, namely, they have to transmit high power to run with high speed and they have to make maximum use of the limited space. This paper reports the reviews and results for the test and evaluation method of reduction gearbox for high speed train and discusses various test items and methods about assembly and parts of gearbox transmission.

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헬리컬 기어의 치형최적화에 관한 연구 (A Study on Optimization of Tooth Micro-geometry for a Helical Gear Pair)

  • 장기;강재화;류성기
    • 한국기계가공학회지
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    • 제10권4호
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    • pp.70-75
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    • 2011
  • Nowadays, modern gearboxes are characterized by high torque load demands, low running noise and compact design. Also durability of gearbox is specially a major issue for the industry. For the gearbox which used in wind turbine, gear transmission error(T.E.) is the excitation that leads the tonal noise known as gear whine, and radiated gear whine is also the dominant source of noise in the whole gearbox. In this paper, tooth modification for the high speed stage is used to compensate for the deformation of the teeth due to load and to ensure a proper meshing to achieve an optimized tooth contact pattern. The gearbox is firstly modeled in Romax software, and then the various combination analysis of the tooth modification is presented by using Windows LDP software, and the prediction of transmission error under the loaded torque for the helical gear pair is investigated, the transmission error, contact stress, root stress and load distribution are also calculated and compared before and after tooth modification under one torque condition. The simulation result shows that the transmission error and stress under the loads can be minimized by the appropriate tooth modification.

Reliable Fault Diagnosis Method Based on An Optimized Deep Belief Network for Gearbox

  • Oybek Eraliev;Ozodbek Xakimov;Chul-Hee Lee
    • 드라이브 ㆍ 컨트롤
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    • 제20권4호
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    • pp.54-63
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    • 2023
  • High and intermittent loading cycles induce fatigue damage to transmission components, resulting in premature gearbox failure. To identify gearbox defects, numerous vibration-based diagnostics techniques, using several artificial intelligence (AI) algorithms, have recently been presented. In this paper, an optimized deep belief network (DBN) model for gearbox problem diagnosis was designed based on time-frequency visual pattern identification. To optimize the hyperparameters of the model, a particle swarm optimization (PSO) approach was integrated into the DBN. The proposed model was tested on two gearbox datasets: a wind turbine gearbox and an experimental gearbox. The optimized DBN model demonstrated strong and robust performance in classification accuracy. In addition, the accuracy of the generated datasets was compared using traditional ML and DL algorithms. Furthermore, the proposed model was evaluated on different partitions of the dataset. The results showed that, even with a small amount of sample data, the optimized DBN model achieved high accuracy in diagnosis.

구형 인볼루트 베벨기어에 대한 실험적 연구 (The Experimental Investigation of the Spherical Involute Bevel Gear)

  • 정동현;이형우;박노길
    • 한국정밀공학회지
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    • 제17권2호
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    • pp.105-113
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    • 2000
  • For exact spherical involute bevel gear, serveral researchers had developed the mathematical models. The solid models of straight bevel gears are obtained and inspected to avoid interference by computer graphics. Furthermore, A gearbox is assembled by spherical involute bevel gears, which are manufactured by CNC machine. The transmission errors in the tooth mesh are measured by Laser sensor, are compared with the AGMA standard. This gearbox is found to be ranked AGMA Q10(JIS 3)

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기어박스 시스템 형상 상쇄설계를 통한 로터크래프트 동력전달장치 경량화 연구 (Study on Weight Reduction of Rotorcraft Power Transmission System through Trade-off Design on Gearbox System Configuration)

  • 김수철;이근호;박영준;조승제;양계병;박경수
    • 한국추진공학회지
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    • 제21권6호
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    • pp.8-14
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    • 2017
  • 로터크래프트의 동력전달장치용 기어박스는 엔진에서 생성된 동력을 승하강 및 전진 비행을 위한 팬 및 푸셔로 전달하며, 사용목적에 따라 메인기어박스, 보조기어박스로 구분된다. 로터크래프트 동력전달장치용 기어박스의 주 설계 목표는 주어진 요구사항(전달동력, 장착공간 등)을 모두 만족시키는 범위에서 가능한 경량화 설계를 하는 것이다. 특히 기어박스는 같은 기능을 하더라도 시스템 구성에 따라 전체 중량이 크게 달라질 수 있기 때문에 경량화를 위해서는 초기 개념 설계가 매우 중요하다. 본 연구에서는 엔진의 장착 위치에 따른 기어박스의 다양한 개념 설계를 수행하였다. 또한 각 개념 설계에 따른 기어, 베어링 등의 요소부품 설계를 수행하여 시스템 구성에 따른 예상 중량을 비교 검토하였다.

고속 펌프용 증속기의 동특성에 관한 연구 (A Study on Dynamic Characteristics by Gearbox of High-speed Pump)

  • 이동환;이형우
    • 연구논문집
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    • 통권31호
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    • pp.65-75
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    • 2001
  • A dynamic model of pump having one step gearbox and two step gearbox is developed by the lumped parameter method. The model accounts for shafts, ball bearings and journal bearings flexibilities, gyroscopic effects and the force couplings among the transverse and torsion motions due to gearing. Excitation forces of pump having one step gearbox and two step gearbox are considered as the mass unbalance of the rotors and gear transmission error which comes from the modified tooth surface. A Campbell diagram, in which the excitation sources caused by the mass unbalance of the rotors and the transmitted errors of the gearing are considered, shows that there are no critical speeds at the operating speeds. One step and two step gearboxes are manufactured and are estimated for vibration/noise, lubrication and performance.

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