大马力推土机整机性能匹配研究

发布时间：2018-09-19 17:08

【摘要】：随着我国经济的飞速发展,大型的工程项目越来越多,大马力推土机开始有了巨大的市场需求。目前国内市场上大马力推土机产品不多,此类产品大多需要依靠进口。大马力推土机整机性能匹配工作是开发大马力推土机的基础。本文通过对大马力推土机动力传递系统的研究,开发出一款适合大功率发动机的液力传动系统匹配软件,为大马力推土机整机性能匹配工作提供帮助。避免整机开发过程中不必要的人力财力损失,大大缩短产品研发周期。由此可见,对大马力推土机整机性能的匹配研究具有极其重要的意义。本文将主要做以下工作：(1)大马力发动机性能特性研究；对比大马力发动机外特性曲线与中小马力发动机外特性曲线不同之处,并给出大马力发动机特性数值计算公式。(2)研究与大马力发动机相匹配的液力变矩器性能特性并建立相关数学模型。(3)研究大马力发动机与液力变矩器匹配理论；建立动力传递系统各种数学模型；通过对整车牵引特性数据分析评价匹配优劣。(4)用VB编程语言开发出针对大功率发动机与液力变矩器匹配计算的软件；软件中在牵引特性部分参数计算中加入实际产品开发中用到的液力变矩器闭锁计算,使得该软件更加贴近实际应用；用某型号的大功率柴油发动机和某型号的液力变矩器参数来进行软件的调试和验证,以此为企业解决实际的问题。
[Abstract]:With the rapid development of economy in our country, there are more and more large engineering projects, and large-horsepower bulldozers begin to have huge market demand. At present, there are few large-power bulldozer products in the domestic market, most of which need to be imported. The performance matching of large-horsepower bulldozer is the basis of developing high-horsepower bulldozer. Through the research on the power transfer system of large horsepower bulldozer, a matching software of hydraulic transmission system suitable for high power engine is developed in this paper, which can help the whole performance matching of large horsepower bulldozer. Avoid unnecessary loss of human and financial resources in the whole machine development process, greatly shorten the product R & D cycle. Therefore, it is of great significance to study the performance matching of large horsepower bulldozer. The main work of this paper is as follows: (1) the research on the performance characteristics of the high-horsepower engine, the difference between the outer characteristic curve of the high-horsepower engine and that of the medium and small horsepower engine. The numerical calculation formula of the characteristics of the high-horsepower engine is given. (2) the performance characteristics of the hydraulic torque converter matched with the high-horsepower engine are studied and the relevant mathematical models are established. (3) the matching theory between the high-horsepower engine and the hydraulic torque converter is studied. All kinds of mathematical models of power transfer system are established, and the matching quality is evaluated by analyzing and evaluating the traction characteristic data of the whole vehicle. (4) the software for the matching calculation between the high-power engine and the hydraulic torque converter is developed with VB programming language. The hydraulic torque converter latching calculation used in the actual product development is added to the calculation of some parameters of the traction characteristics, which makes the software more close to the practical application. The software is debugged and verified with the parameters of a certain type of high power diesel engine and a certain type of hydraulic torque converter, so as to solve the practical problems for enterprises.
【学位授予单位】：山东理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU623.5

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