QUY100履带起重机动力匹配研究

发布时间：2018-05-02 21:37

本文选题：履带起重机 + 动力匹配　；参考：《吉林大学》2011年硕士论文

【摘要】：履带起重机在国内可以算作新兴产业,最近五年发展极为迅速,不但产量以每年超过50%以上的增长率增长,而且吨位也在跨越式的提高,到2010年,国内最大履带起重机达到2000吨,可以与世界最高水平相媲美。但缺乏专门的动力匹配研究,应用水平还处于一个较低的水平,由于履带起重机需要匹配大功率发动机,能耗巨大,因此研究履带起重机动力匹配具有十分重要的意义。本文以QUY100吨履带起重机作为研究对象,针对某公司的QUY100吨履带起重机在将力士乐的恒功率变量泵系统更换为林德的LS负载敏感系统后,出现行走时发动机容易熄火的问题,利用AMESim液压仿真软件及数据采集仪等设备,对QUY100吨履带起重机的两种动力系统进行了全面分析,并对行走液压系统和卷扬系统进行了系统性测试评估,通过分析、测试了解到熄火原因是林德的LS负载敏感系统在发动机低转速工况时所需功率超出发动机所能提供的范围,造成发动机动力不足。然后,根据熄火问题原因提出了降低LS泵上的流量控制阀压差△P、限制控制阀位移、引入发动机转速信号、改变LS阀反馈特性等四种有效的解决方法,并进行了简单的改进方案验证。更好地实现发动机与液压泵的合理匹配,达到提高作业效率及环保、节能的目的。文中提出的控制方案具有良好的节能效果,为后续的产品开发提供了一定的理论基础。
[Abstract]:Crawler cranes can be regarded as a new industry in China. In the past five years, the development of crawler cranes has been extremely rapid. Not only has the output increased at an annual rate of more than 50%, but also the tonnage has been increased by leaps and bounds. By 2010, The largest crawler crane in China reaches 2000 tons, comparable to the highest level in the world. However, due to the lack of special research on dynamic matching and the low level of application, it is very important to study the dynamic matching of crawler cranes because the crawler cranes need to match high power engines and consume a lot of energy. This paper takes the QUY100 ton crawler crane as the research object, aiming at the QUY100 ton crawler crane of a certain company. After replacing Rexroth's constant power variable pump system with Linde's LS load sensitive system, the engine flameout easily occurs while walking. Two kinds of power systems of QUY100 ton crawler crane are comprehensively analyzed by using AMESim hydraulic simulation software and data acquisition equipment, and systematic test and evaluation of walking hydraulic system and hoisting system are carried out. The test results show that the reason of flameout is that Lind's LS load sensitive system needs more power than the engine can provide under low speed condition, which results in insufficient engine power. Then, according to the reason of flameout problem, four effective solutions are put forward, such as reducing the pressure difference of flow control valve on LS pump, limiting the displacement of control valve, introducing engine speed signal and changing the feedback characteristic of LS valve. A simple improved scheme is verified. The reasonable matching of engine and hydraulic pump is realized, and the purpose of improving working efficiency, environmental protection and energy saving is achieved. The proposed control scheme has good energy-saving effect and provides a theoretical basis for subsequent product development.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH213.7

【参考文献】