胶带煤流采样机设计 - 图文

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摘 要

煤炭质量是煤炭交易和加工应用的最主要的指标,获得可靠的测试结果必然依赖于规范的检测过程,在采、制、化三个环节中,采样过程中可能导致的偏差是最严重的,采用机械化采样设备是最有效的手段之一。

胶带煤流采样机是以电机为动力,通过减速器及带轮传递驱动力,利用大带轮上的挡杆使偏心轮重心上移的传动系统。采样机采样间隔时间通过时间继电器来调节。采样机机架设置在带式输送机机架两侧,整个传动装置均设在采样机机架上。该机器机构紧凑,制造成本低,采样准确可靠,自动化程度高,是替代人工采样的理想工具,具有广泛的推广应用价值。

关键词：采样 ；采样机 ；输送机 ；自动取样

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ABSTRACT

Coal quality is the most important indication of commercial and processing or application. And obtaining credible testing result should depend on conventional testing processing. Among the 3 processing of sampling, making and test, sampling may cause the most serious errors, therefore, using the sampling machine should be one of the most effective means.

The machine is the transmission system with motor as power that transmits drive through gear reducer, sprockets, and uses the rod on big sprockets that makes the focus of partial ship moving upwardly. Sampling time - interval is adjusted through time relay. Install the frame of sampling machine that coincides with the frame of belt conveyor. Entire drive device is set up on frame of sampling machine. This machine, organization is compact, manufacturing costs are low, sampling coal is accurate and reliable, and automation level is high.So it is an ideal tool of replacing artificial sampling and has extensive popularize application value.

Key words: sampling; sampling machine; belt conveyor; auto - sampling

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目 录

1 绪论 ···················································································································· 1

1.1煤样的采取与制备 ·················································································· 1

1.1.1概述 ······························································································· 1 1.1.2煤的不均匀性 ··············································································· 1 1.1.3采样 ······························································································· 2 1.2商品煤样的采取 ······················································································ 2

1.2.1采样工具 ······················································································· 2 1.2.2采样基本原则 ··············································································· 3 1.2.3煤流中采样 ··················································································· 4 1.2.4商品煤样自动采取 ······································································· 5 1.3选煤厂生产检查煤样的采取 ·································································· 5

1.3.1生产检查主要项目和采样一般原则 ··········································· 5 1.3.2采样间隔时间和子样质量 ··························································· 6 1.3.3采样点及采样方法 ······································································· 6 1.3.4采样精密度 ··················································································· 7 1.3.5自动采样机 ··················································································· 7

2 样机设计方案的确定 ······················································································ 10

2.1刮臂式(回运动式)样机结构原理 ························································· 10

2.1.1刮臂式采样机结构 ····································································· 10 2.1.2刮臂式采样机工作原理 ······························································11 2.1.3刮臂式采样机方案说明 ······························································11 2.2采样机整机方案示意图 ·········································································11 3采样机的初步设计计算 ··················································································· 12

3.1铲斗的设计 ···························································································· 12 3.2接斗的设计 ···························································································· 12 4偏心块的设计 ··································································································· 13

4.1选择偏心块的材料 ················································································ 15 4.2计算每次采集煤样重量 ········································································ 15 4.3计算每次采集所需做的功 ···································································· 16

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4.4计算偏心块的尺寸 ················································································ 16 4.5验算 ········································································································ 17 5减速器的设计计算 ··························································································· 18

5.1方案的确定 ···························································································· 18 5.2计算传动装置的运动和动力参数 ························································ 19

5.2.1电动机选型 ················································································· 19 5.2.2动力参数计算 ············································································· 19 5.2.3高速级齿轮参数计算 ································································· 20 5.2.4低速级齿轮参数计算 ································································· 29 5.3轴的设计计算 ························································································ 38

5.3.1高速轴（齿轮轴） ····································································· 38 5.3.2低速轴 ························································································· 42 5.4滚动轴承的选择计算 ············································································ 43 5.5键联接的选择及校核计算 ···································································· 43 5.6减速器的润滑和密封形式 ···································································· 44 5.7减速器箱体设计 ···················································································· 45 6链传动设计 ······································································································· 47

6.1滚子链的结构 ························································································ 47 6.2链轮材料 ································································································ 48 6.3滚子链传动的设计计算 ········································································ 48 6.4滚子链链轮尺寸计算 ············································································ 50

6.4.1滚子链链轮的基本参数和主要尺寸 ········································· 50 6.4.2三圆弧一直线槽形状尺寸计算 ················································· 52 6.4.3轴向齿廓尺寸 ············································································· 54 6.4.4整体式钢制小链轮主要结构尺寸 ············································· 54 6.4.5腹板式、单排铸造大链轮主要结构尺寸 ································· 54 6.4.6滚子链链轮的量柱测量距MR ··················································· 55 6.4.7各项公差的确定 ········································································· 55 6.4.8绘制大小链轮图基本数据 ························································· 56

7主轴的设计与校核 ··························································································· 57

7.1选择轴的材料 ························································································ 57