滑移装载机液压系统热平衡分析

发布时间：2018-02-20 18:52

本文关键词： 滑移转向装载机液压系统热平衡仿真实验改进　出处：《吉林大学》2012年硕士论文　论文类型：学位论文

【摘要】：滑移装载机是一种多功能的工程机械，有着良好的工作性能和机动性能。虽然目前滑移装载机在国内的用户还很少，但是它的优势会令越来越多的人接受它。滑移装载机的生产厂家也越来越多，竞争将会更加激烈。各生产厂家都在设法提高整机性能，来应对市场的挑战。一直以来，油温过高都是工程机械行业研究的重要课题。滑移装载机的一体化结构使得这个问题更加突出。本文以某款滑移装载机为例，通过理论分析找到油温较高的原因，再进行试验加以验证，并提出改进方法，最终使得整机的热平衡性能有了明显的提高，具体过程如下：第1章：本文对滑移装载机做了简要概述，介绍了滑移的优势和热平衡的问题，分析滑移装载机行走液压系统和工作液压系统热平衡性能的优缺点，，介绍了热平衡的研究现状。第2章：本章进行了液压系统发热源的理论分析。油温升高的原因在于功率损失，而功率损失来源于管路和阀的压力损失，泵和执行元件的效率损失等等。本文经过了初步分析，找到各部分的功率损失对油温的影响程度，为实验做好准备。第3章：本章进行了液压系统的散热分析。流体的散热是导热，对流，辐射三种方式的综合过程。在对流和辐射的散热方式中，流体的运动状态对散热量有着很大的影响，本章综合考虑了这些影响，对液压系统的三种散热形式进行了分析。第4章：本章在理论分析的基础上进行了一些实验，实际测量了各工况下液压系统各部分的压力损失，以及各工况下油液的温升，对理论分析进行验证。第5章：本章首先进行了液压系统发热分析和散热分析，分析了油温过高的原因，然后根据实验结果从减少发热和增加散热两个方面提出改进措施，实验表明改进措施取得了一定的效果。
[Abstract]:Skid loader is a multi-functional engineering machinery, has a good working performance and maneuverability. Although the skid loader in the domestic users is also very small, but its advantage will make more and more people accept it. The skid loader manufacturers more and more, the competition will be more intense. Manufacturers are trying to improve the performance of the whole machine, to meet the challenges of the market.
Since the high temperature is an important research subject in the engineering machinery industry. The integrated structure of skid loader makes this problem more prominent. Taking a skid loader as an example, analysis of the reasons to find the oil temperature is higher by theory, then tests, and put forward the improvement methods, finally makes the performance of the heat balance has been significantly improved, the specific process is as follows:
The first chapter: This paper gives a brief overview of the skid loader, introduces the advantages of sliding and the problem of heat balance, analyzes the advantages and disadvantages of the heat balance performance of the sliding loader's running hydraulic system and the working hydraulic system, and introduces the research status of the heat balance.
The second chapter analyzes the hydraulic system heat source theory. The temperature is due to power loss and power loss in the pipeline and the valve pressure loss, pump and actuator efficiency loss and so on. After a preliminary analysis, find the power loss of each part of the lost influence on the oil temperature, do in preparation for the experiment.
The third chapter analyzes the hydraulic system of the cooling fluid. The heat is the heat conduction, convection, radiation process in three ways. In the cooling mode of convection and radiation, the motion state of the fluid has great influence on the heat dissipation, this chapter considers these effects of three kinds of form of heat dissipation. The hydraulic system is analyzed.
The fourth chapter: Based on theoretical analysis, some experiments were carried out in this chapter, and the pressure loss of each part of the hydraulic system under different working conditions was measured, and the temperature rise of the oil under different working conditions was verified, which is verified by theoretical analysis.
The fifth chapter: this chapter first analyzes the heating and heat dissipation of the hydraulic system, analyzes the reasons for the high oil temperature, and then according to the experimental results, puts forward the improvement measures from two aspects of reducing the heat and increasing the heat dissipation. The experiment shows that the improvement measures have achieved certain results.

【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH243

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