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摘 要
國(guó)內(nèi)薄煤層開(kāi)采在許多礦井中都面臨著很多的問(wèn)題，而朔里礦區(qū)也是如此。隨著礦井可采儲(chǔ)量的日益枯竭，薄煤層的開(kāi)采問(wèn)題已越來(lái)越突出。 由于開(kāi)采設(shè)備原因，對(duì)于1.3～1.5m的較薄煤層開(kāi)采，機(jī)械化程度普遍不高，其生產(chǎn)效率也比較低。薄煤層開(kāi)采制約了下序其它煤層的開(kāi)采速度，直接影響著 礦井高產(chǎn)高效生產(chǎn)。較薄煤層使用大架型機(jī)械設(shè)備進(jìn)行開(kāi)采，不僅開(kāi)采成本增高，而且頂板常會(huì)被切割，導(dǎo)致煤炭灰分增高，甚至資源不能得到回收。
目前國(guó)內(nèi)的薄 煤層綜采技術(shù)，尤其是綜采機(jī)械化裝備配套技術(shù)還很不成熟，正處于探索階段。對(duì)于大傾角較薄煤層綜采方面的現(xiàn)場(chǎng)技術(shù)實(shí)踐就更少了， 其理論研究工作也相對(duì)薄弱。根據(jù)我們朔里礦業(yè)的自然資源情況，有些就屬于大傾角薄煤層。因此，積極探索機(jī)械化開(kāi)采途徑就很有必要。
本課題分析的在機(jī)械式采煤機(jī)基礎(chǔ)上改成液壓式的采煤機(jī)。主要進(jìn)行了液壓式俯采采煤機(jī)總體方案設(shè)計(jì)，液壓式俯采采煤機(jī)截煤部結(jié)構(gòu)設(shè)計(jì)，液壓式俯采采煤機(jī)牽引部結(jié)構(gòu)設(shè)計(jì)及計(jì)算。
關(guān)鍵詞：煤層；開(kāi)采；機(jī)械式；液壓式
ABSTRACT
The thin coal seam mining are facing a lot of problems in many mines, and Shuoli kaolin and so. With the increasing depletion of the mine recoverable reserves, mining of thin coal seam has been more and more prominent. Because of mining equipment, for 1.3 ~ 1.5m of thin seam mining, the degree of mechanization is generally not high, the production efficiency is low. Thin coal seam mining restricts the speed of order other coal mining, directly affects the high production and high efficient mine. The thin coal seam with large mechanical equipment for mining, not only the mining cost increased, and the roof is often cut, resulting in coal ash content increased, and even the resources can not be recovered. Thin seam mining technology in China at present, especially the fully mechanized mining equipment technology is not very mature, is in the stage of exploration. For the practical field large inclination of thin seam mining area is less, the theoretical research is relatively weak. According to the mining of natural resources of our moon, some belong to the thin coal seam with large inclined angle. Therefore, it is necessary to explore the positive mechanized mining method.
Analysis on the mechanical coal mining machine based on the change of the coal mining machine hydraulic. Mainly to the overall scheme design of hydraulic shearer underhand, shearer cutting structure design of hydraulic bent mining, hydraulic down coal shearer structure design and calculation.
Keywords: coal seam; mining machinery; hydraulic;
目 錄
第1章 緒 論 - 1 -
1.1 采煤機(jī)國(guó)內(nèi)外研究現(xiàn)狀 - 1 -
1.2大傾角薄煤層開(kāi)采技術(shù)及設(shè)備概述 - 2 -
1.2.1 概述 - 2 -
1.2.2 選擇合適的綜采配套設(shè)備 - 2 -
1.2.3 回采技術(shù)工藝 - 3 -
1.2.4 支架和運(yùn)輸機(jī)防倒滑措施 - 3 -
第2章 液壓式俯采采煤機(jī)總體方案設(shè)計(jì) - 5 -
2.1 采煤機(jī)牽引部液壓系統(tǒng)得特點(diǎn) - 5 -
2.2 設(shè)計(jì)參數(shù) - 5 -
2.3 主油路系統(tǒng) - 5 -
2.4 調(diào)速及換向回路 - 7 -
2.5 保護(hù)系統(tǒng) - 8 -
2.5.1 電動(dòng)機(jī)功率過(guò)載保護(hù) - 8 -
2.5.2 高壓保護(hù) - 8 -
2.5.3 低壓欠壓保護(hù) - 8 -
2.5.4 停機(jī)油泵自動(dòng)回零保護(hù) - 8 -
2.5.5 閉式系統(tǒng)充油排氣 - 9 -
第3章 液壓式俯采采煤機(jī)截割部結(jié)構(gòu)設(shè)計(jì) - 10 -
3.1 截割部概述 - 10 -
3.2 截割部特點(diǎn) - 10 -
3.3 齒輪傳動(dòng)的設(shè)計(jì)計(jì)算 - 10 -
3.3.1 第一傳動(dòng)組齒輪設(shè)計(jì)計(jì)算 - 10 -
3.3.2 第二傳動(dòng)組齒輪設(shè)計(jì)計(jì)算 - 20 -
3.3.3 第三傳動(dòng)組齒輪設(shè)計(jì)計(jì)算 - 27 -
3.4 截一軸及其軸承壽命驗(yàn)算 - 35 -
3.4.1 求軸上的載荷 - 35 -
3.4.2 校核該軸的強(qiáng)度 - 37 -
3.5 截二軸的詳細(xì)校核 - 37 -
3.5.1 求軸上的載荷 - 37 -
3.5.2 校核該軸的強(qiáng)度 - 39 -
3.6 截三軸的詳細(xì)校核 - 39 -
3.6.1 求軸上的載荷 - 39 -
3.6.2 校核該軸的強(qiáng)度 - 41 -
3.6.3 軸承壽命的驗(yàn)算 - 42 -
第4章 液壓式俯采采煤機(jī)牽引部結(jié)構(gòu)設(shè)計(jì) - 43 -
4.1 牽引部傳動(dòng)系統(tǒng)的分析 - 43 -
4.2 各級(jí)齒輪的傳動(dòng)比的確定 - 43 -
4.3 主油泵和馬達(dá)的計(jì)算 - 43 -
4.4 回路泵的選擇 - 47 -
4.5 采煤機(jī)牽引部液壓控制元件的選擇 - 48 -
4.6 牽引部液壓系統(tǒng)的壓力損失驗(yàn)算 - 50 -
4.7 牽引部液壓系統(tǒng)得溫升驗(yàn)算 - 51 -
4.8 牽引部輔助裝置液壓傳動(dòng)系統(tǒng) - 52 -
總 結(jié) - 54 -
參 考 文 獻(xiàn) - 55 -
致 謝 - 56 -
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