摘要本文着重研究了绞车液压系统，利用负载敏感控制技术来设计了一种既能电控,又能手动控制,可全方位旋转的绞车液压系统。

绞车是一种用于提升和下放重物的动力设备，主要分为电动绞车和液压绞车两大类。液压绞车通过液压马达来带动绞车滚筒转动的一种新型提升机械。液压绞车装置功率密度大，并且结构较为紧凑，因此与电动绞车相比，具有更多的优点，它在传动领域所占的份额也越来越大。于此同时，液压技术与材料成形技术发展迅速，液压元器件已经向小型化高集成度发展，在相同的体积情况下，它们实现的功能越来越复杂。56695

 通过负载敏感技术的引入来简化绞车的液压系统，提供可靠简单的控制方式，同时从源头上减少多余压力油从溢流阀溢流的能耗。

本文采用负载敏感技术设计了液压绞车系统,它既可以通过plc实现电控，同时也可以手控，另外行了绞车部分总体布置设计，并计算了主要参数，完成了主要元器件的选型。

毕业论文关键词：液压绞车;PLC;比例多路阀;负载敏感技术

Abstract This paper focuses on the winch hydraulic system, using load sensing control technology to design a can control, and manual control, can be all round the winch hydraulic system.

Winch is used for power equipment of lifting and lowering heavy objects, mainly pided into electric winch and hydraulic winch two categories. Hydraulic winch through the hydraulic motor to drive a new hoisting winch drum rotation. Hydraulic winch device of high power density, and more compact structure, so compared with the electric winch, has more advantages in the field of transmission, its share is growing. At the same time, hydraulic technology and material forming technology is developing rapidly, hydraulic components to miniaturization of high integration development, in the case of the same size, and they achieve more complex.

To simplify the hydraulic winch through the introduction of load sensing technology, providing reliable and simple control mode, at the same time, from the source to reduce excess pressure relief valve of the oil from the energy consumption.

This paper adopts the hydraulic winch system design load sensitive technique, it can realize the control by PLC, but also can be controlled by hand, in addition the winch part of the overall layout design, main parameters and calculation, selection of main components of the completed.

Keywords: hydraulic winch;  PLC;  proportional valve;  load sensing technology;

目录

第一章  绪论 1

1.1  研究目的和意义 1

1.2 国内外的发展现状 1

1.3 主要研究内容 2

第二章 系统方案确定 4

2.1 绞车的概述 4

2.2系统传动方案确定 5

2.2.1 液压传动系统 5

2.2.2 电机传动系统 6

2.2.3 传动方案确定 7

2.3 系统控制方案的确定 7

2.3.1 继电器信号控制系统 8

2.3.2 PLC信号控制系统 8

2.3.3 控制方案确定 10

第三章  系统结构布局 11

3.1 液压绞车总体布置设计 11

3.2液压绞车机构布置设计