710 离心式渣浆泵结构设计

摘 要

离心式渣浆泵广泛应用于煤炭、矿山、冶金、电力、水利、交通等 部门，主要进行静矿、尾矿、灰渣、泥沙等固体物料的水力输送，但其 过流部件的磨损相当严重，其主要破坏形式为过流部件洞穿和变形，过 流部件的严重磨损，恶化了泵内流动特性及外特性，缩短了泵的实际使 用寿命，使生产效率降低，加大耗能和设备的投资，进而影响生产的发 展。因此所设计的渣浆泵中采用多叶片数来减少单个叶片的磨损，适当 的增加过流部件的厚度并采用高硬度的耐磨材料来来减小磨损， 将叶轮 入口的后盖板设计为凸出的、由光滑圆弧组成的轮毂头。采用填料密封 来防止高压液体从泵中漏出和防止空气进入泵内并用背叶片来平衡轴 向力。本设计详细介绍了渣浆泵的总体结构，工作原理和结构设计。

关键词：叶轮 背叶片 填料密封

Abstract

The slurry pump is the extensive applying in the coal, mineral mountain, metallurgy, electrical, water conservancy, transportation and so on. It is main to proceed the water power of the static mineral, tail mineral, ash grain, sediment solid material transportation. But its very serious over the abrasion that flow the parts. Its main breakage form is over flow the parts penetrate with transformation. Over serious abrasion that flow the parts，it is worsening the pump inside flows characteristic and outside characteristics, shorting the actual service life of the pump and making production efficiency lower, enlarging consumes the investment of the equipments, and then affecting the development of the production. It adopt many leaf's number to reduce the single abrasion of leaf's slice for this designing slurry pump, also increased combines over the thickness that flow the parts the high degree of hardness in adoption bears to whet the material to come to let up the wear and tear, and empressed an entrance covers plank design as to bulge and smooth hubcap head . Adopted the filler which is sealed completely to prevent the high pressure liquid to leak from the pump with keep air from entering to pump the inside counteract to carry on the back leaf's slice to equilibrium stalk face dint. This design was detailed to introduce the total construction that slurry pump, the work principle designs with the construction.

Key words : impeller auxiliary impeller the filler seals

目 录

摘要 (Ⅰ)

Abstract (Ⅱ)

一般部分

第 1 章 概论 (1)

1.1 泵的定义及其用途 (1)

1.2 泵的分类 (1)

1.2.1 叶片式泵 (1)

1.2.2 容积式泵 (1)

1.2.3 特殊类型的泵 (2)

第 2 章 泵的结构设计与计算 (3)

2.1 泵基本参数的确定 (3)

2.1.1 泵吸入口和排除口的确定 (3)

2.1.2 轴径的初步计算 (3)

2.2 叶轮的水力设计 (5)

2.2.1 叶轮的主要参数的选择和计算 (5)

2.3 压水室的设计 (14)

第 3 章 径向力与轴向力的平衡 (20)

3.1 径向力及其平衡 (20)

3.2 轴向力及其分 (21)

3.3 轴向力的平衡 (23)

3.4 用背叶片平衡轴向力 (23)

第 4 章 离心泵主要零部件的强度计算 (25)

4.1 引言 (25)

4.2 叶轮的强度的 (25)

4.2.1 叶轮强度计算 (25)

4.2.2 叶片厚度的计算 (26)

4.2.3 轮毂强度的计算 (27)

4.3 泵体强度的计算 (28)

4.4 泵轴的校核 (29)

4.4.1 按扭转强度校核 (29)

4.4.2 按弯扭合成强度条件计算 (29)

4.4.3 校核轴的强度 (31)

4.4.4 按疲劳强度条件进行精确校核 (31)

4.4.5 按静强度条件进行校核 (35)

4.4.6 轴的刚度校核计算 (35)

4.5 键的校核 (35)

4.5.1 键的剪应力校核 (35)

4.5.2 键的挤压切应力的计算 (36)

第5章 渣浆泵零部件的选择 (37)

5.1 选用渣浆泵零部件的重要性 (37)

5.2 轴封结构的选择 (38)

5.2.1 常用的填料 (38)

5.2.2 填料函结构尺寸的确定 (38)

5.2.3 填料密封安装技术要求 (40)

5.3 轴承部件的选择 (40)

5.3.1 滚动轴承的润滑及轴承结 (41)

5.3.2 滚动轴承安装时的问题 (41)

第 6 章 渣浆泵装配及运转的注意事项 (42)

6.1 装配时的注意事项 (42)

6.2 运转时的注意事项 (42)

6.3 维护和保养 (43)

6.3.1 轴封的维护 (43)

6.3.2 叶轮的调节 (43)

6.3.3 轴承组件 (44)

第 7 章 经济分析 (45)

结论 (46)

参考文献 (47)

专题部分

固液两相流离心泵磨损机理和叶轮的设计 (49)

附录 1 外文翻译

1.1 外文翻译 (55)

1.2 外文原文 (68)