大型矿用自卸车静液压传动系统设计
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摘要
大型矿用自卸车是现代矿山企业重要的运输工具之一，目前普遍使用的是大型电动轮自卸车，已暴露出其体积庞大、重量大、故障率高等缺点。由于静液压传动具有工作平稳、冲击小、重量轻、无级调速及调速范围大、易于实现自动化、在恶劣工作条件下相对电传动性能更可靠等优点，近年来发展迅速，已受到车辆传动领域的广泛重视。在分析了矿用电动轮自卸车电动轮传动型式、工作条件及负载变化后，参考由湘潭电机集团有限公司生产的108t电动轮自卸车，结合静液压传动的优点，设计了大型矿用自卸车的静液压传动系统，驱动是由四个液压马达输出扭矩驱动车辆的四轮驱动型式，采用双泵供油的闭式变量系统；鉴于转向和举倾不同时发生，在设计中采用举倾时双泵合流的供油方式，从而充分利用了发动机功率，减少了能量损耗；同时还对大型矿用自卸车的制动性能进行了分析，能够满足其制动要求。
Keywords: dump truck; electric wheel dump truck; hydrostatic transmission
目录
摘要Ⅰ
AbstractⅡ
第1章绪论1
1．1大型矿用电动轮自卸车的现状及发展1
1．2现代液压技术的发展2
1．3大型矿用自卸车用静液压驱动的可行性与优越性3
3统传动方案12
3．5液压传动系统的设计计算12
3.5.1确定液压系统的工作压力13
3.5.2液压传动参数及性能的计算13
3.5.3辅助装置21
3．6拟定驱动液压系统工作原理图23
3．7液压元件的选择和设计25
第4章液压转向系统的设计27
4．1转向系统的基本要求27
第5章液压举倾系统的设计35
5．1概述35
5．2举倾系统的限速措施35
5．3液压举倾系统的设计计算36
5.3.1倾卸油缸行程及内径的计算37
5.3.2倾卸油缸容积及油泵的计算39
5．4拟定液压举倾系统工作原理图39
4．2转向方式及转向随动系统方框图27
4.2.1轮式车辆转向方式27
4.2.2转向随动系统方框图28
4．3液压转向系统方案的选择28
4．4液压转向系统设计计算29
4.4.1转向阻力矩的计算29
4.4.2转向油缸参数的确定30
4.4.3转向器参数的确定32
4.4.4油泵参数的确定33
4．5拟定液压转向系统工作原理图33
1．4本设计的任务和目标4
第2章主要技术参数及对液压系统的要求5
2．1主要技术参数5
2．2主机对液压系统的要求5
第3章静液压驱动系统的设计6
3．1车辆行走机构对液压传动系统的要求6
3．2液压驱动系统的型式6
3.2.1容积调速系统6
3.2.2功率分流液压调速系统7
3．3行走驱动系统性能的主要参数7
3．4静液压驱动系统方案的确定8
关键词：矿用自卸车；电动轮自卸车；静液压传动
Abstract
Large mining dump truck is one of the modern mining enterprises an important means of transportation, the popular use of large electric wheel dump truck, has exposed its huge size, heavy weight, high rate of breakdown. Because of the hydrostatic transmission with stable, the impact of small, light weight, stepless speed regulation and wide range of speed regulation, easy to realize automation, relative in the harsh working conditions of electric transmission more reliable performance and other advantages, the rapid development in recent years, has received wide attention in the field of automobile transmission. In the analysis of the electric wheel dump truck electric wheel drive type, working conditions and load changes, reference produced by Xiangtan Electric Group Co., Ltd. 108t electric wheel dump truck, combining the advantages of the design of the hydrostatic transmission, large mining dump truck hydrostatic transmission system, drive four wheel drive type consists of four hydraulic motor output torque to drive the vehicle, using closed variable system with double pump oil; in view of steering and lift does not occur at the same time, the supply mode of lift double pump confluence in the design, so as to make full use of the engine power, reduce energy loss; also the braking performance for large dump truck is analyzed, can meet the braking requirements.
大型矿用自卸车是现代矿山企业重要的运输工具之一，目前普遍使用的是大型电动轮自卸车，已暴露出其体积庞大、重量大、故障率高等缺点。由于静液压传动具有工作平稳、冲击小、重量轻、无级调速及调速范围大、易于实现自动化、在恶劣工作条件下相对电传动性能更可靠等优点，近年来发展迅速，已受到车辆传动领域的广泛重视。在分析了矿用电动轮自卸车电动轮传动型式、工作条件及负载变化后，参考由湘潭电机集团有限公司生产的108t电动轮自卸车，结合静液压传动的优点，设计了大型矿用自卸车的静液压传动系统，驱动是由四个液压马达输出扭矩驱动车辆的四轮驱动型式，采用双泵供油的闭式变量系统；鉴于转向和举倾不同时发生，在设计中采用举倾时双泵合流的供油方式，从而充分利用了发动机功率，减少了能量损耗；同时还对大型矿用自卸车的制动性能进行了分析，能够满足其制动要求。
Keywords: dump truck; electric wheel dump truck; hydrostatic transmission
目录
摘要Ⅰ
AbstractⅡ
第1章绪论1
1．1大型矿用电动轮自卸车的现状及发展1
1．2现代液压技术的发展2
1．3大型矿用自卸车用静液压驱动的可行性与优越性3
3统传动方案12
3．5液压传动系统的设计计算12
3.5.1确定液压系统的工作压力13
3.5.2液压传动参数及性能的计算13
3.5.3辅助装置21
3．6拟定驱动液压系统工作原理图23
3．7液压元件的选择和设计25
第4章液压转向系统的设计27
4．1转向系统的基本要求27
第5章液压举倾系统的设计35
5．1概述35
5．2举倾系统的限速措施35
5．3液压举倾系统的设计计算36
5.3.1倾卸油缸行程及内径的计算37
5.3.2倾卸油缸容积及油泵的计算39
5．4拟定液压举倾系统工作原理图39
4．2转向方式及转向随动系统方框图27
4.2.1轮式车辆转向方式27
4.2.2转向随动系统方框图28
4．3液压转向系统方案的选择28
4．4液压转向系统设计计算29
4.4.1转向阻力矩的计算29
4.4.2转向油缸参数的确定30
4.4.3转向器参数的确定32
4.4.4油泵参数的确定33
4．5拟定液压转向系统工作原理图33
1．4本设计的任务和目标4
第2章主要技术参数及对液压系统的要求5
2．1主要技术参数5
2．2主机对液压系统的要求5
第3章静液压驱动系统的设计6
3．1车辆行走机构对液压传动系统的要求6
3．2液压驱动系统的型式6
3.2.1容积调速系统6
3.2.2功率分流液压调速系统7
3．3行走驱动系统性能的主要参数7
3．4静液压驱动系统方案的确定8
关键词：矿用自卸车；电动轮自卸车；静液压传动
Abstract
Large mining dump truck is one of the modern mining enterprises an important means of transportation, the popular use of large electric wheel dump truck, has exposed its huge size, heavy weight, high rate of breakdown. Because of the hydrostatic transmission with stable, the impact of small, light weight, stepless speed regulation and wide range of speed regulation, easy to realize automation, relative in the harsh working conditions of electric transmission more reliable performance and other advantages, the rapid development in recent years, has received wide attention in the field of automobile transmission. In the analysis of the electric wheel dump truck electric wheel drive type, working conditions and load changes, reference produced by Xiangtan Electric Group Co., Ltd. 108t electric wheel dump truck, combining the advantages of the design of the hydrostatic transmission, large mining dump truck hydrostatic transmission system, drive four wheel drive type consists of four hydraulic motor output torque to drive the vehicle, using closed variable system with double pump oil; in view of steering and lift does not occur at the same time, the supply mode of lift double pump confluence in the design, so as to make full use of the engine power, reduce energy loss; also the braking performance for large dump truck is analyzed, can meet the braking requirements.