摘要
针对大型铁路工程机械两输入两输出走行系统存在最大轮周起动牵引力、牵引功率不足及最高牵引走行速度较低的问题,研究设计新型闭式液压驱动六输入两输出走行系统,即6个液压马达作为动力输入点驱动走行齿轮箱,经走行齿轮箱变换后形成2个动力输出点,用来驱动车轴和车轮。通过建立该系统的牵引特性理论计算分析模型,计算分析其最大轮周起动牵引力、轮周牵引功率和最高牵引走行速度;并在1台轨道除雪车上安装了2套该系统进行测试。结果表明：这种新型走行系统的最大轮周起动牵引力实测值为116kN,较理论计算值仅低2.6%;轮周牵引功率实测值在380~410kW范围内波动,平均值约为390kW,较理论计算值仅低2.0%;最高牵引走行速度实测值为132km·h-1,较理论计算值略高;该新型走行系统不但能够向多个作业装置提供充足的作业动力,还能够输出较高的牵引走行速度和较大的轮周牵引力,且走行较为平稳。
Since there are some problems in the two-input and two-output running system of the major rail- way engineering machinery, such as insufficient maximum starting tractive force at wheel rim, traction power and lower maximum traction running speed, a new six-input and two-output running system driven by closed hydraulic system has been studied and designed. It has six hydraulic motors as a power input to drive running gearbox and then converted into two power outputs for driving axles and wheels. By establishing the theoretical calculation and analysis model of traction characteristics, its maximum starting tractive force at wheel rim, traction power and traction running speed have been calculated and analyzed. Two sets of this system are installed and tested on a track snow cleaning car. Results show that the measured value of the maximum starting tractive force at the wheel rim of the new running system is 116 kN, which is only 2. 6% lower than theoretical calculation value. The traction power at wheel rim is fluc- tuant in the range from 380 to 410 kW and the average is about 390 kW, which is only 2.0% lower than theoretical calculation value. The measured value of the maximum traction running speed is 132 km. h-1 , which is slightly higher than theoretical calculation value. The new running system not only can provide sufficient operation power for numbers of operation devices but also can output higher traction running speed, greater tractive force at wheel rim and more stable running.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2015年第6期97-103,共7页
China Railway Science
基金
铁道部科技研究开发计划重点项目(2011G017-E)
关键词
铁路工程机械
走行系统
牵引特性
液压系统
理论计算
测试
Railway engineering machinery
Running system
Traction characteristics
Hydraulic system Theoretical calculation
Test
