蓄能式液控蝶阀液压系统的设计和计算

目录

内容提要II

Summary III

1绪论1

1.1液压传动的发展历史1

1.2我国液压传动发展情况2

1.3液压传动在机械行业中的应用3

1.4液压系统的基本组成4

1.5 液控蝶阀5

1.6设计方案简述7

2 液控蝶阀液压系统设计7

2.1 技术参数和设计要求7

2.2蝶阀安装方式选择8

2.3 工况分析8

2.4 负载循环图和速度循环图的绘制9

2.5液压系统原理图的拟定9

2.6 控制过程综述10

3 液压系统的计算和元件选型11

3.1液压缸主要尺寸的确定11

3.2液压泵的流量，压力的确定和泵规格的选择11 3.3液压泵匹配电动机的选定13

3.4 阀类元件及辅助元件的选择13

3.5 管道的确定15

4 液压缸的结构设计18

4.1 液压缸主要尺寸的确定18

4.2 液压缸的结构设计21

5 液压油箱的设计22

5.1 液压油箱有效容积的确定22

5.2 液压油箱的外形尺寸设计23

5.3 液压油箱的结构设计23

6 液压辅助元件的选择25

6.1 蓄能器的选择25

6.2 液位控制器的选择25

6.3 空气过滤器的选择25

6.4 温度计的选择26

6.5 压力表的选择26

6.6 回油过滤器的选择26

6.7 液压工作介质的选择26

7液压系统性能的验算26

7.1压力损失的验算26

7.2 系统温升的验算26

8 液压系统安装及调试27

8.1 液压系统安装27

8.2 调试运行27

8.3 液压系统污染的控制28

8.4 调试注意事项28

8.5 液压系统的维护及注意事项28

设计总结29

参考文献29

致谢30

内容提要

本设计是对蓄能式液控蝶阀液压系统的设计和计算，运用了许多液压知识和机械设计原理，液控蝶阀是国内应用比较多的一种自动控制阀，如水轮机的进水阀，以及一些管道的自动开关阀。

本液压系统为蓄能式全液方式，不需要锤，减少了能量的消耗与空间，两个蓄能器，保障了辅助能源，应急动力的充分供给，并且保障了足够的容积，而且若一个有损坏，也可便于拆卸更换与维修。

蓄能式液压系统结构紧凑，可置于阀门联接架上或置于阀门附近，若客户需要，

可用PLC进行自动控制，并可以与PC主机连接进行自动化远程控制。

本液控系统的工作顺序为：首先液压系统启动油泵，压力油经单向阀、换向阀进入油腔无杆腔，推动活塞运行，实现阀门开启，同时向蓄能器供油，蓄能器的油压由压力控制器确定。阀门的关闭是由蓄能器内的压力油经换向阀进入油缸有杆腔，使油缸退回，迅速关闭阀门。关闭时间及角度由油缸尾部控制部分控制。

关键词：液压系统液控蝶阀蓄能式自动化控制

Summary

The is a energy storage type hydraulic controlled butterfly valve hydraulic system design and calculation which using many hydraulic knowledge and mechanical design principle. The hydraulic controlled butterfly valve is a domestic application in many automatic control valves today in China, such as the turbine inlet valve, and some of the pipe ’s automatic switch valve.

The hydraulic system of energy storage with all the liquid waytype, don't need to hammer, what’s more ,reduce the energy consumption and space.With two accumulator to guarantee the auxiliary energy, emergency power supply full, and security enough volume, besides,and if one damaged, we can facilitate the removal replacement and maintenance.

Energy storage type hydraulic system structure is compact, may be placed on a shelf or in the valve valve connection near, if the customer need, can use PLC for automatic control, and can be connected to the PC host for automatic remote control.

The hydraulic controlled system work order: first hydraulic system startup oil pump, oil pressure by the check valve, reversing valve into oil chamber no stem cavity, drive the pistons operation, the realization of the valve open, and to provide the accumulator injection, accumulator of hydraulic pressure determined by the controller. The valve is closed by the pressure inside the accumulator oil in the reversing valves into the oil cylinder rod chamber, make the oil cylinder return, quickly close the valve. Closing time by the oil cylinder and Angle control part control.