汽车起重机起升系统分析与仿真
发布时间：2019-06-11 15:54
【摘要】：汽车起重机是一种应用非常广泛的行走式起重设备,其起升系统动态性能的好坏对于产品的整机性能至关重要。当前国内汽车起重机液压系统的设计和各个元器件的选择是按系统的静态性能进行理论计算以及凭设计人员的经验,所设计的系统需要等到产品成型之后经过测试才能够清楚其动态使用性能的好坏。如果系统设计不合理,动态性能不够理想,就必须进行重新设计,这将延长产品的设计周期并增加研发成本。在系统设计完成以后,采用计算机仿真技术对其进行分析,对系统的动态性能作出评估,当发现有不足之处时改进系统的结构或者修正系统的参数,可使结果满足要求。 本文以某型汽车起重机的起升系统作为研究对象,利用AMESIM仿真软件深入分析了起升系统的动态特性。 (1)分析了起升机构及液压系统的原理,然后对整个起升系统的设计过程进行了反推计算,确定了起升系统大部分参数,为后续的仿真工作打下了基础。 (2)利用AMESIM仿真软件对起升系统下降工况的关键元件平衡阀进行了仿真建模,并初步确定了模型的正确性。 (3)对整个起升系统进行了仿真建模,将其分为起升和下降两个典型的工况进行分析,同时对起升系统经常出现的二次下滑现象进行了仿真研究,找出了影响其幅度的主要因素,并提出了相应的解决方案。 (4)分析了起升系统下降工况的液压泵的能耗,阐明了负载敏感平衡阀较之于传统平衡阀更为节能的原因,同时指出,起升工况中根据负载的大小适当调节变量泵的排量有利于降低柴油发动机的油耗率,减少能量损耗。 本文利用AMESIM软件建立了起升系统的模型,对各个变量的仿真结果进行了分析和研究,为汽车起重机起升系统的设计和改进提供了相关的理论依据,同时将AMESIM仿真软件应用到了汽车起重机起升系统的研究当中,具有现实意义。
[Abstract]:Truck crane is a kind of walking lifting equipment which is widely used. The dynamic performance of its lifting system is very important to the performance of the whole product. At present, the design of hydraulic system of truck crane in China and the selection of each component are calculated theoretically according to the static performance of the system and with the experience of designers, the designed system needs to wait until the product is formed and tested before it can know the dynamic performance of the system. If the design of the system is unreasonable and the dynamic performance is not ideal, it must be redesigned, which will prolong the design cycle of the product and increase the cost of research and development. After the design of the system is completed, the computer simulation technology is used to analyze it, and the dynamic performance of the system is evaluated. When the shortcomings are found, the structure of the system can be improved or the parameters of the system can be modified, so that the results can meet the requirements. In this paper, the lifting system of a certain truck crane is taken as the research object, and the dynamic characteristics of the lifting system are deeply analyzed by using AMESIM simulation software. The main contents are as follows: (1) the principle of lifting mechanism and hydraulic system is analyzed, and then the design process of the whole lifting system is calculated back, and most of the parameters of the lifting system are determined, which lays a foundation for the subsequent simulation work. (2) the AMESIM simulation software is used to simulate the balance valve of the key components in the descending condition of the lifting system, and the correctness of the model is preliminarily determined. (3) the whole lifting system is simulated and modeled, which is divided into two typical working conditions: lifting and falling. At the same time, the secondary decline phenomenon of lifting system is simulated, the main factors affecting its amplitude are found out, and the corresponding solutions are put forward. (4) the energy consumption of the hydraulic pump under the falling condition of the lifting system is analyzed, and the reason why the load sensitive balance valve is more energy-saving than the traditional balance valve is expounded. At the same time, it is pointed out that properly adjusting the displacement of the variable pump according to the size of the load in the lifting condition is beneficial to reduce the fuel consumption rate and energy loss of the diesel engine. In this paper, the model of lifting system is established by using AMESIM software, and the simulation results of each variable are analyzed and studied, which provides the relevant theoretical basis for the design and improvement of truck crane hoisting system. At the same time, the AMESIM simulation software is applied to the research of truck crane hoisting system, which is of practical significance.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH213.6
本文编号：2497310
[Abstract]:Truck crane is a kind of walking lifting equipment which is widely used. The dynamic performance of its lifting system is very important to the performance of the whole product. At present, the design of hydraulic system of truck crane in China and the selection of each component are calculated theoretically according to the static performance of the system and with the experience of designers, the designed system needs to wait until the product is formed and tested before it can know the dynamic performance of the system. If the design of the system is unreasonable and the dynamic performance is not ideal, it must be redesigned, which will prolong the design cycle of the product and increase the cost of research and development. After the design of the system is completed, the computer simulation technology is used to analyze it, and the dynamic performance of the system is evaluated. When the shortcomings are found, the structure of the system can be improved or the parameters of the system can be modified, so that the results can meet the requirements. In this paper, the lifting system of a certain truck crane is taken as the research object, and the dynamic characteristics of the lifting system are deeply analyzed by using AMESIM simulation software. The main contents are as follows: (1) the principle of lifting mechanism and hydraulic system is analyzed, and then the design process of the whole lifting system is calculated back, and most of the parameters of the lifting system are determined, which lays a foundation for the subsequent simulation work. (2) the AMESIM simulation software is used to simulate the balance valve of the key components in the descending condition of the lifting system, and the correctness of the model is preliminarily determined. (3) the whole lifting system is simulated and modeled, which is divided into two typical working conditions: lifting and falling. At the same time, the secondary decline phenomenon of lifting system is simulated, the main factors affecting its amplitude are found out, and the corresponding solutions are put forward. (4) the energy consumption of the hydraulic pump under the falling condition of the lifting system is analyzed, and the reason why the load sensitive balance valve is more energy-saving than the traditional balance valve is expounded. At the same time, it is pointed out that properly adjusting the displacement of the variable pump according to the size of the load in the lifting condition is beneficial to reduce the fuel consumption rate and energy loss of the diesel engine. In this paper, the model of lifting system is established by using AMESIM software, and the simulation results of each variable are analyzed and studied, which provides the relevant theoretical basis for the design and improvement of truck crane hoisting system. At the same time, the AMESIM simulation software is applied to the research of truck crane hoisting system, which is of practical significance.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH213.6
【引证文献】
相关期刊论文 前1条
1 雷兆虹;徐丽;游小平;李思思;汪宗应;;起重机二次起升下滑方案研究及仿真分析[J];公路与汽运;2013年03期
相关硕士学位论文 前1条
1 徐丽;起重机液压起升机构二次起升下滑仿真及其改进研究[D];长沙理工大学;2013年
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