• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
• /
• pp.132-137
• /
• 2011

철도차량의 고속화, 경량화와 함께 승객의 안전성을 보다 더 높이기 위한 많은 연구가 진행 되고 있다. 철도차량의 안전성을 높이기 위해서는 주행성능을 안정시키는 것이 무엇보다 중요하며, 드라이빙기어 내부의 윤활유량을 최적화하는 것은 주행성능 확보에 필수적이다. 본 연구에서는 전동차용 Driving Gear Unit의 회전 방향에 따라 저속 Gear 치면을 통해 Splash 되는 드라이빙기어 Casing내의 윤활유 유동 변화를 ANASYS CFD 프로그램과 전산유체해석 기법을 사용하여 구현 하였으며, 해석 내역을 토대로 유사 구동 조건에 대한 무부하 실증 시험을 실시하여 해석의 적합성 및 윤활유량 선정과 드라이빙기어의 안전성에 대해 고찰하였다.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2005년도 춘계학술대회 논문집
• /
• pp.225-230
• /
• 2005

This paper describes determination of optimal lubricant quantity for driving gear unit. The purpose of selecting optimal lubricant quantity is to evaluate durability of driving gear unit. Lubricant quantity of driving gear unit is important factor affecting durability. The determination methode of lubricant quantity evaluation is used calculation necessary lubricant quantity first, then selection of optimal oil quantity as a base for moving of oil temperature according to changing oil quantity.

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2012년도 추계학술대회 논문집
• /
• pp.965-966
• /
• 2012

• 한국기계가공학회지
• /
• 제18권6호
• /
• pp.91-97
• /
• 2019

Rotating machining unit is a revolutionary product that can process worm shaft or spiral shaft with fast and precise, a rotary type cutting tool, which is attached to automatic lathe and processes spiral groove on outer circumference of round bar. In this work, a study on micro tooth shape modification method of driving gear train in the rotating machining unit was presented. To observe the effect on power transmission characteristics of the driving gear pair, visualize the gear meshing condition and the load distribution on the gear teeth by using the professional gear train analysis program RomaxDesigner. By comparing the repeated analysis results, the effect of micro tooth shape modification on power transmission characteristics on driving gear can be summarized. The optimized gears were fabricated and measured by precision tester as a validation in this research.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2007년도 춘계학술대회 논문집
• /
• pp.13-19
• /
• 2007

This study is to establish design method and evaluation technology for drive system appropriate to articulated vehicles. The transmission system of articulated vehicles serves in the other condition compared with those of commercial vehicles, namely, they have to transmit high power to run and they have to make maximum use of the limited space. This paper reports the reviews and results of the design and evaluation method for driving gear unit of articulated vehicles and discusses various design items and methods about assembly and parts of driving gear unit.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2004년도 추계학술대회 논문집
• /
• pp.211-215
• /
• 2004

This paper describes the result of structure analysis and load test of torque arm for driving gear unit. The purpose of the analysis and test is to evaluate an safety which torque arm shall be considered fully sufficient rigidity so as to satisfy proper system function under maximum load. Driving gear unit consist of gearbox and torque arm. Both components, torque arm is significant component subjected to the vehicle and motor loads. The evaluation methode is used the FEM analysis, static and fatigue test. The test results have been very safety and stable for design load conditions.

• 한국정밀공학회지
• /
• 제30권7호
• /
• pp.673-678
• /
• 2013

Driving gear units can be affected by various problems, including those associated with external or internal defects in the bearing, problems with the lubricant oil, high-loading of the railway, and frequent impacts generated by rail joints. Temperature monitoring is a basic method in diagnosing abnormal conditions in the reduction gear and other components. This paper describes a new wireless monitoring system for the temperature diagnosis of abnormal conditions of the reduction gear. Integrated circuit (IC)-type temperature sensors were installed in the reduction gear box of a high-speed railway car. The temperature data from the reduction gear were acquired and analyzed in situ during high-speed rail operation. Analysis of these data was used to alert the driver and/or maintenance personnel when problems occurred.

• 한국소음진동공학회논문집
• /
• 제25권7호
• /
• pp.470-480
• /
• 2015

As the railway noise guideline of the Ministry of Environment after 2017 is strictly enforced, the noise level at stationary condition of urban railway is demanding the reduction about 2 dB(A). And the noise level at running condition is reduced by 6 dB(A) at 80 km/h. Therefore, the devices that causes noise shall arrange for the improvement plan of noise reduction for each device. In this paper, we carried out a technical review of the driving gear used to drive the vehicle from a variety of noise-induced equipment of a urban railway. Analyze the causes of the current noise levels and noise cause about the driving gear used in current urban railway and this study analyzes the noise level and noise cause the drive gear being used in the current urban railway. Finally, in this paper proposes a scheme for reducing the noise that can be designed to reduce the noise with considering the noise cause analysis.

• 한국가스학회지
• /
• 제26권2호
• /
• pp.9-13
• /
• 2022

벨트나 체인을 이용한 감속기는 간단한 장치이긴 하지만 공간을 많이 차지하여 공간상의 제약이 있기 때문에 전동휠체어 구동부에는 부적합하다. 하지만 유성기어형태의 감속기는 동일 축에서 감속이 이루어지기 때문에 부피를 작게 할 수 있어 공간의 제약이 벨트나 체인형태의 감속기보다 덜하다. 따라서 본 연구에서는 수·전동전환이 가능한 휠체어의 구동부에 대한 연구를 통하여 유성기어형태를 이용한 감속기로 큰 추진력을 얻을 수 있는 구동부를 개발하였다. 그에 따라 감속기에 적용되는 유성기어의 치형을 Kisssoft 프로그램을 이용하여 설계를 진행하였다. 또한 기존 휠체어 바퀴에 적용 가능하도록 구동부의 설계를 진행하였고, 구동부의 수·전동 전환원리 및 작동원리에 대한 메커니즘의 최적화를 진행하였다. 연구내용을 토대로 하나의 선기어와 2개의 유성기어, 하나의 링기어를 갖는 유성기어 형태의 휠체어 감속기 구동부의 최종 설계 및 제작을 진행하였다.

• 한국기계가공학회지
• /
• 제18권4호
• /
• pp.93-99
• /
• 2019

A cross drilling/milling Unit is an important mechanical part which is widely used in many kinds of machining tool, and various gear trains with good accuracy and reliability features are widely used in power transmission systems. A study on a novel power transmission optimization method for driving gear trains in cross drilling/milling units is presented in this paper. A commercial program for gear system simulation, Romax Designer, was used in this research to intuitively observe the gear meshing and the load distribution conditions on the gear teeth. We obtained the optimal modification value through comparing the results of repeated experiments. For validation, optimized gears were fabricated and then measured with a precision tester.