武汉科技大学高职生毕业设计
摘 要
此次设计的飞机维修升降平台液压系统，设计过程中系统的分析了系统的工作状况，以及在该工作状况下所系统所要达到的工作要求。设计中针对系统中的液压泵，电机，液压缸等主要元件的选型进行了详细的计算与校核。
在泵站的设计中，核心部分是泵，油箱以及蓄能器的设计计算与选型，三者的关系是相互影响的，同时，液压系统也受外在因素的诸如工作环境和工作温度的影响，这些影响对系统的影响是非常大的，这个因素考虑的不全面直接影响到系统的工作性能。
在系统的各个参数计算中，根据设计内容所给出的额定流量、最大流量、额定压力、最大压力等条件，得出系统所需的最大流量，然后根据所需的流量和压力来选择泵、电机、油箱、管道等液压元件。各种液压辅件（过滤器、冷却器、加热器等）就按测试系统的要求来具体选定。在计算过程的最后，再计算液压系统的压力损失等进行校核。
设计中的大部分元件都是通过相关参数的计算，根据产品的样本经行选型，以达到系统的要求。
关键词： 减压回路；系统设计； 升降台
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武汉科技大学高职生毕业设计
Abstract
The design of the hydraulic system of aircraft maintenance lift platform, the system requirement is able to finish all kinds of proportion, including
performance test valve related flow characteristic and Laplace domain response characteristics. The design process of system analysis and the working condition of the system in the working condition and under what you are trying to achieve work system requirements. In the design of hydraulic pump and motor for system, hydraulic cylinder main components such as the line of the selection of the detailed calculation and checking.
In the design of the pump, the core part is the pump, oil tank, and the design calculation and selection of accumulator, the relationship between is mutual influence, meanwhile, hydraulic system also affected by external factors such as work environment and working temperature, the influence of the influence of system's influence is very big, the factors considered not comprehensive directly affect system performance.
In the system of each parameter calculation, of the given according to the design content rated flow, maximum flow rate, pressure rated, maximum pressure, it is concluded that the condition such as required by the system, then according to the maximum flow for flow and pressure to choose the pump motor, oil tank,
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武汉科技大学高职生毕业设计
pipeline etc hydraulic components. The various hydraulic auxiliary parts (filters, cooler, heater, etc) as test system requirements to specific selected. In the last, the calculating process of calculating hydraulic system again test pressure loss, etc.
Most of the components are designed by related parameters calculation according to product samples, the line selection, in order to achieve system requirements.
Key words: Pressure-relief loop; System design; Lift platform
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武汉科技大学高职生毕业设计
目 录
1. 绪论 ................................................................................................................ 1 1.1 背景及工艺 ............................................................................................ 1 1.2 设计任务 ................................................................................................ 1 1.3 设计方案 ............................................................................................. 1 2 设计计算 ......................................................................................................... 3 2.1 液压缸设计计算 ................................................................................... 3 2.1.1 液压缸的设计原则 ..................................................................... 3 2.1.2 液压缸的选型 ............................................................................. 3 2.1.3 工作压力的确定 ......................................................................... 4 2.1.4 液压缸的参数计算 ..................................................................... 4 2.2 泵的选择计算 ..................................................................................... 5 2.2.1 泵的选择计算原则 ..................................................................... 5 2.2.2 液压泵的选型 ......................................................................... 6 2.3 电动机的选择 ....................................................................................... 7 2.4 管道的设计计算 ................................................................................... 8 2.4.1 管路 ............................................................................................. 8 2.4.1.1 吸油管 ........................................................................................... 8 2.4.1.2 压油管 ........................................................................................... 9 2.4.1.3 回油管 ........................................................................................... 9 2.5 油箱的设计计算 ................................................................................. 10
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武汉科技大学高职生毕业设计
2.5.1 基本功能 ................................................................................... 10 2.5.2 基本机构 ................................................................................... 11 2.5.3 吸、回、压油管的设置 ........................................................... 11 2.5.4 隔板的设置 ............................................................................... 11 2.5.5 空气滤清器与液位计的设置 ................................................... 11 2.5.6 放油口的设置 ........................................................................... 11 2.5.7 密封装置 ................................................................................... 11 2.5.8 油箱参数设计计算 ................................................................... 12 2.6 元件选型 ............................................................................................. 12 2.6.1 滤油器 ....................................................................................... 12 2.6.2 单向阀 ....................................................................................... 12 2.6.3 双单向节流阀 ........................................................................... 13 2.6.4 电磁溢流阀 ............................................................................... 13 2.6.5 压力表 ....................................................................................... 13 2.6.6 减压阀 ....................................................................................... 13 2.6.7 电磁换向阀 ............................................................................... 13 2.6.8 液压锁 ....................................................................................... 13 2.6.9 系统元件选型明细 ................................................................... 14 3. 总结 .............................................................................................................. 16 参考文献 ............................................................................................................. 17 致 谢 ................................................................................................................. 18
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