120L风冷式（独立油路）静压供油系统设计
摘要
本文采取液体（独立油路）静压支承来平衡轴向力的方法。改善矿山排水装置平衡盘受力状况，解决离心水泵轴向力引起磨损严重的问题。延长水泵使用寿命，提高效率，降低矿井排水装置的维修费用。液体（独立油路）静压支承是借助于输入支承工作面间的液体（独立油路）静压力来支承载荷的滑动支承。它处于纯液体润滑条件下工作。液体（独立油路）静压支承具有速度范围宽、支承能力大、运动精度高、抗振性能好和使用寿命长等优点。但液体（独立油路）静压支承需要一套液压供油系统，润滑油的过滤精度要求较高。本文以150D309型泵轴向力的液体（独立油路）静压支承平衡为例。并且适合在各种型号的矿用的水泵的改装，起到代替平衡盘的作用。因为盘之间的较小间隙处容易堵塞，另一方面，固体颗粒会加快平衡盘的磨损，造成平衡盘与平衡环之间的间隙增大，达不到原有的平衡作用。所以矿用水泵可广泛采用液体（独立油路）静压支承来平衡轴向力。
关健词：多级离心泵；液体（独立油路）静压支承；轴向力；平衡盘
Abstract
In this paper, the method of balancing the axial force with the hydrostatic support of liquid (independent oil way) is adopted. It improves the stress condition of the balance plate of the drainage device and solves the serious wear problem caused by the axial force of the centrifugal pump. The service life of the pump is prolonged, the efficiency is increased, and the maintenance cost of the mine drainage device is reduced. Liquid (independent oil way) hydrostatic bearing is a sliding support supported by the static pressure of the liquid between the working faces of the input support and the independent oil path. It works under the condition of pure liquid lubrication. Liquid (independent oil way) hydrostatic bearing has the advantages of wide speed range, large supporting capacity, high motion accuracy, good anti vibration performance and long service life. But the liquid (independent oil way) hydrostatic bearing needs a set of hydraulic oil supply system, and the filtering accuracy of the lubricating oil is relatively high. This paper takes the balance of hydrostatic bearing of liquid pump (independent oil circuit) of 150D309 pump as an example. And it is suitable for the modification of various types of mining pumps, instead of balancing disc. Because the smaller gap between the plates is easy to block, on the other hand, the solid particles will speed up the wear of the balance plate and cause the gap between the balance plate and the balance ring to increase, which can not reach the original balance effect. Therefore, the static pressure support of liquid (independent oil way) can be widely used to balance the axial force of mine pumps.
Guan Jian's words: multistage centrifugal pump; liquid (independent oil way) hydrostatic bearing; axial force; balance disc.
目录
前言………………………………………………………………………………1
1在矿山中水泵的应用…………………………………………………………3
1.1矿山对排水设备的要求………………………………………………………3
1.2常用主排水泵结构……………………………………………………………3
1.3平衡盘工作原理………………………………………………………………4
1.4产生轴向推力的主要原因……………………………………………………4
2液体（独立油路）静压支承原理……………………………………………8
2.1流体静压技术的简述…………………………………………………………8
2.2油腔的流量及有效面积的计算推导…………………………………………8
2.2.1基本矩形油腔的流量计算…………………………………………………8
2.2.2环行油腔推力轴承的流量计算原理………………………………………9
2.3节流器的流量计算…………………………………………………………12
2.3.1小孔节流器………………………………………………………………12
2.3.2节流比和液阻比………………………………………………………13
2.4液体（独立油路）静压支承的承载能力计算………………………………13
2.4.1单油腔静压支承…………………………………………………………13
2.4.2对称等面积对置油腔静压支承…………………………………………14
2.5液体（独立油路）静压支承的油膜刚度计算………………………15
2.5.1油膜刚度的概念…………………………………………………………15
2.5.2单油腔静压支承油膜刚度计算…………………………………………16
3总体设计方案…………………………………………………………………18
3.1水泵的轴向推力计算………………………………………………………20
3.2平衡装置结构设计计算……………………………………………………20
3.2.1止推板尺寸计算…………………………………………………………20
3.2.2油泵供油压力计算………………………………………………………20
3.2.3节流器选择………………………………………………………………21
3.2.4油垫中油膜刚度及最大位移的计算……………………………………22
3.2.5油膜的流量及功率………………………………………………………23
4液压控制系统设计……………………………………………………………25
4.1选择液压泵…………………………………………………………………25
4.2选择电机……………………………………………………………………26
4.3阀类元件及辅助元件………………………………………………………27
4.4液压系统的性能验算………………………………………………………36
4.4.1系统压力损失的验算……………………………………………………36
4.4.2油液发热温生计算………………………………………………………38
4.5设计及使用时的注意事项…………………………………………………39
5经济性评估……………………………………………………………………40
6结论……………………………………………………………………………41
致谢………………………………………………………………………………42
参考文献…………………………………………………………………………43
参考文献
[1]丁振乾.流体静压支承设计[M].上海科学技术出版社，1986.
[2]陕西煤矿学校.矿山流体机械[M].河南省煤矿学校，1983.
[3]隗金文，王慧.液压传动[M].东北大学出版社，2001.
[4]赫尔姆特 舒尔茨.泵 原理 计算与结构[M].机械工业出版社，1985.
[5]白铭声，矿井排水装置运行与选择设计[M].煤炭工业出版社，1990.
[6]郑连宏，郭仁宁，仇宝志，静压支承技术在多级离心泵上的应用研究[J].辽宁工程技术大学学报.2002. 373~375.
[7]陈燕生.液体（独立油路）静压支承原理和设计[M].北京：国防工业出版社。1980.
[8]丁振乾. 液体（独立油路）静压支承设计[M].上海：上海科学技术出版社，1991.
[9]白铭声，陈祖苏.流体机械[M].北京；煤炭工业出版社，1986.
[11]杨天觉，杨尔庄，李寿刚.新编液压工程手册[M].北京理工大学出版社，1998.
[12] Baiden, G. “Multiple LHD Teleoperation and Guidance at Inco Limited”, [M].Proceedings of the International Mining Conference, 1993.
