采煤机液压系统毕业设计

摘 要

采煤机的液压系统，由牵引液压系统、截煤滚筒调高系统和破碎滚筒调高系统三部分组成。其牵引液压系统包括主油路系统、操作系统和保护系统。

采煤机的调高系统由截煤调高系统和破碎调高系统组成。

液压传动系统的设计是整机设计的一部分，它除了应符合主机动作循环和静动态性能等方面的要求外，还应当满足结构简单，工作安全可靠、效率高、寿命长、经济性好、使用维护方便等条件。 关键词：牵引液压系统；调高系统；系统设计

Abstract

The liquid which adopt coal machine press system, from lead a liquid to press the system, piece coal roller to key up system and broken up roller to key up system three part constitute.It lead a liquid to press system to include the lord oil road system, operate system and protection system.

Adopt key up of coal machine system is keyed up system by the piece coal with broken up key up system to constitute.

The liquid press to spread to move system of design is the whole machine design of a part, it in addition to should match a host action circulation with quiet dynamic state function etc. of request, return should satisfy structure simple, work safety credibility, efficiency Gao, life span long, economy good, usage maintenance convenience etc. condition.

Keyword:Lead the liquid press system;Key up system;System design

目录

摘 要 ................................................................................................... 1 Abstract .................................................................................................. 2 第 一 章 牵引液压系统 ..................................................................... 5 1.1 主油路系统 ................................................................................. 5 1.2 操作系统...................................................................................... 6

1.2.1 手动操作 .................................................................................................. 6 1.2.2 电气操作 .................................................................................................. 7 1.2.3 液压操作 .................................................................................................. 8

1.3 保护系统...................................................................................... 9

1.3.1 电动机功率超载保护系统 ...................................................................... 9 1.3.2 恒压调速系统 ........................................................................................ 10 1.3.3 高压保护系统 ........................................................................................ 11 1.3.4 低压欠压保护系统 ................................................................................ 12 1.3.5 停机主泵自动回零保护 ........................................................................ 13 1.3.6 超速和差速防滑保护 ............................................................................ 13 1.3.7 过零保护 ................................................................................................ 14

第 二 章 调高系统 ...........................................................................15 2.1 电器操作....................................................................................15 2.2 液压操作....................................................................................17

2.2.1 调高锁紧回路 ........................................................................................ 17 2.2.2 滚筒调高 ................................................................................................ 18 2.2.3 调高油路 ................................................................................................ 20

2.3 卸载回路....................................................................................20 2.4 调高油缸位置锁定 ...................................................................20 第 三 章 液压系统计算 ...................................................................22 3.1 液压缸的选择 ...........................................................................22 3.2 液压泵与马达的选择 ...............................................................23

3.2.1 液压马达的选择 .................................................................................... 24 3.2.2 液压泵的选择 ........................................................................................ 25

3.2.3 辅助泵的选择 ........................................................................................ 26 3.2.4 调高泵的选择 ........................................................................................ 27

3.3 液压阀的选择 ...........................................................................27

3.3.1 主要性能指标 ........................................................................................ 28 3.3.2 主油路系统阀的选择 ............................................................................ 29 3.3.3 滤油器的选择 ........................................................................................ 33 3.3.4 电动机的选择 ........................................................................................ 34 3.3.5 主要元件一览表 .................................................................................... 35

致谢 .....................................................................................................38 参考文献 .............................................................................................39