ZL50轮式装载机液压系统节能技术与应用研究

发布时间：2018-06-18 12:59

本文选题：装载机 + 负载敏感　；参考：《山东大学》2011年硕士论文

【摘要】：随着工业技术的发展,能源短缺的问题将日趋严重。工程机械作为能源消耗的一部分,对于节能技术有新的要求。装载机是工程机械中主要的铲土运输机械,保有量大,应用广泛。ZL50装载机作为装载机的典型产品,对其进行节能技术研究不仅具有重要的理论指导意义而且还具有重要的工程应用价值。本文首先介绍了国内外轮式装载机的发展现状,特别是信息技术,微电子技术,人机工程学等技术在装载机上的应用,并对国内外装载机节能技术的研究现状进行了详细阐述。其次,对ZL50装载机现行液压系统,包括装置液压系统,转向液压系统进行了详细介绍。对转向液压系统匹配进行了分析研究,由负荷敏感柱塞泵和负荷传感转向器组成的负荷敏感转向系统,能够自动将负载需要的流量,压力信号反馈到泵的变量机构,在保证转向器流量优先的情况下使变量泵的输出流量压力与负载需要的流量压力相匹配；动态信号负荷传感转向器是实现节能的有效手段。然后以提高负荷传感转向器的容积效率,降低局部压力损失,降低压力冲击为目的,在设计和工艺方面采取了如下措施。主要内容包括阀体功能阀一体化设计,阀体热能去毛刺工艺,降低阀体的阀套和阀芯摩擦副间隙,降低表面粗糙度等措施,及转子卸荷槽加工最后,提出了对ZL50型装载机液压系统的节能改进方案。
[Abstract]:With the development of industrial technology, the problem of energy shortage will become more and more serious. As a part of energy consumption, construction machinery has new requirements for energy saving technology. Loader is one of the main shoveling and transportation machinery in construction machinery. It has a large quantity and is widely used as a typical product of loaders. The research on energy saving technology not only has important theoretical significance but also has important engineering application value. This paper first introduces the development status of wheel loader at home and abroad, especially the application of information technology, microelectronics technology, ergonomics and so on, and describes the research status of energy saving technology of loader at home and abroad in detail. Secondly, the current hydraulic system of ZL50 loader, including hydraulic system and steering hydraulic system, is introduced in detail. The matching of steering hydraulic system is analyzed. The load sensitive steering system, which consists of load sensitive piston pump and load sensing steering gear, can automatically feed the load needed flow rate and pressure signal to the variable mechanism of the pump. The output flow pressure of the variable pump is matched with the flow pressure required by the load under the condition of ensuring the flow priority of the steering gear, and the dynamic signal load sensing steering gear is an effective means to realize energy saving. Then, in order to improve the volumetric efficiency of load sensing steering gear, reduce local pressure loss and reduce pressure shock, the following measures are taken in design and process. The main contents include the integrated design of the valve body function valve, the body thermal deburring process, the reduction of valve sleeve and valve core friction pair clearance, the reduction of surface roughness, and the final processing of the rotor unload groove. The energy saving improvement scheme of ZL 50 loader hydraulic system is put forward.
【学位授予单位】：山东大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH243

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