모노레일용으로 사용되는 120 kW급 전기모터에 적합한 고효율의 유성기어 감속기를 제작하기 위하여
유성기어 감속기의 구조 및 제원을 설정하고, 태양기어와 유성기어의 치형을 일반적인 치형과 개선 치형으로 비교하여 분석한다.
유성기어 감속기에서 기어의 치형수정만으로 소음과 발열효과를 개선 할 수 있다면 구조의 간단화 및 원가절감, 에너지 효율 개선에도 도움이 된다.
또한 감속기에서 기어가 차지하는 중요도를 다시한번 확인 할 수 있고, 치형수정이 얼마나 중요한지를 본 연구를 통해서 알아 볼 수 있다.
모노레일용으로 사용되는 120 kW급 전기모터에 적합한 고효율의 유성기어 감속기를 제작하기 위하여
유성기어 감속기의 구조 및 제원을 설정하고, 태양기어와 유성기어의 치형을 일반적인 치형과 개선 치형으로 비교하여 분석한다.
유성기어 감속기에서 기어의 치형수정만으로 소음과 발열효과를 개선 할 수 있다면 구조의 간단화 및 원가절감, 에너지 효율 개선에도 도움이 된다.
또한 감속기에서 기어가 차지하는 중요도를 다시한번 확인 할 수 있고, 치형수정이 얼마나 중요한지를 본 연구를 통해서 알아 볼 수 있다.
Planetary gearing is a gear system consisting of one or more outer gears, or planet gears, revolving about a central, or sun gear. Typically, the planet gears are mounted on a movable arm or carrier which itself may rotate relative to the sun gear.
Advantages of planetary gears over parallel axi...
Planetary gearing is a gear system consisting of one or more outer gears, or planet gears, revolving about a central, or sun gear. Typically, the planet gears are mounted on a movable arm or carrier which itself may rotate relative to the sun gear.
Advantages of planetary gears over parallel axis gears include high power density, large reduction in a small volume, multiple kinematic combinations, pure torsional reactions, and coaxial shafting.
The motor in the electric vehicles outputs high speed/low torque power, and the vehicle need low speed/high torque input power. In order to achieve the purpose, the planetary gears are used in power transmission system in the electric vehicles.
In this study, parameters and requirements of an 120kw class monorail planetary gearbox was analysed and the adaptive planetary gearbox design was selected.
The specification of the sun gear, planetary gear and carrier was set and the profile & lead was optimized. The mechanical efficiency of the optimized one and the original one was observed.
Dynamo-tester system was used to observe the mechanical efficiency of the planetary gearbox. A dynamo unit was connected with the planetary gearbox which straightened through the motor by a coupling.
The standard tooth shape planetary gearbox and modified tooth shape planetary gearbox were used as test pieces and the rotation speed was set from 600 rpm to 6000 rpm with 600 rpm/2.5 min one step.
In this study, in order to check the mechanical efficiency of the planetary gearbox, the tests were done as follows. 1)The power loss between driving motor and dynamo tester. 2)Temperature variation by different rotation speeds. 3)Noise variation by different rotation speeds.
The test results were shown as follows.
1. The right correction of the modified tooth was 10 族? on the sun gear and planetary gear.
2. The error of 10 族? correction on the modified tooth shape was satisfied the KS-B(ISO 1328-1) 5 level Profile Error-FF.
3. The noise performance was improved 3db by gear tooth modification.
4. The temperature rising performance was improved 3db by gear tooth modification without any cooling system.
5. The power loss of the standard tooth shape planetary gearbox was 12.4 kW and in the modified tooth shape planetary gearbox case, the power loss was 10 kW which produced 24% mechanical efficiency improvement by tooth shape modification.
6. The load from gear pair engages is the primary cause of temperature rising and noise. Through the research in this paper, the temperature rising and noise performance improvement was expected by tooth shape modification.
Planetary gearing is a gear system consisting of one or more outer gears, or planet gears, revolving about a central, or sun gear. Typically, the planet gears are mounted on a movable arm or carrier which itself may rotate relative to the sun gear.
Advantages of planetary gears over parallel axis gears include high power density, large reduction in a small volume, multiple kinematic combinations, pure torsional reactions, and coaxial shafting.
The motor in the electric vehicles outputs high speed/low torque power, and the vehicle need low speed/high torque input power. In order to achieve the purpose, the planetary gears are used in power transmission system in the electric vehicles.
In this study, parameters and requirements of an 120kw class monorail planetary gearbox was analysed and the adaptive planetary gearbox design was selected.
The specification of the sun gear, planetary gear and carrier was set and the profile & lead was optimized. The mechanical efficiency of the optimized one and the original one was observed.
Dynamo-tester system was used to observe the mechanical efficiency of the planetary gearbox. A dynamo unit was connected with the planetary gearbox which straightened through the motor by a coupling.
The standard tooth shape planetary gearbox and modified tooth shape planetary gearbox were used as test pieces and the rotation speed was set from 600 rpm to 6000 rpm with 600 rpm/2.5 min one step.
In this study, in order to check the mechanical efficiency of the planetary gearbox, the tests were done as follows. 1)The power loss between driving motor and dynamo tester. 2)Temperature variation by different rotation speeds. 3)Noise variation by different rotation speeds.
The test results were shown as follows.
1. The right correction of the modified tooth was 10 族? on the sun gear and planetary gear.
2. The error of 10 族? correction on the modified tooth shape was satisfied the KS-B(ISO 1328-1) 5 level Profile Error-FF.
3. The noise performance was improved 3db by gear tooth modification.
4. The temperature rising performance was improved 3db by gear tooth modification without any cooling system.
5. The power loss of the standard tooth shape planetary gearbox was 12.4 kW and in the modified tooth shape planetary gearbox case, the power loss was 10 kW which produced 24% mechanical efficiency improvement by tooth shape modification.
6. The load from gear pair engages is the primary cause of temperature rising and noise. Through the research in this paper, the temperature rising and noise performance improvement was expected by tooth shape modification.
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