With the gradual emergence of the advantages of mechanized construction, more and more industries pursue higher efficiency and safer operation, which puts forward higher requirements for the industrial equipment production industry. Underground operation is also gradually developing towards mechanization, and the types of mechanical equipment matching it are gradually increasing, which plays a very important role in improving underground work efficiency.

井下裝載機(jī)的應(yīng)用環(huán)境特殊，不僅對(duì)其機(jī)械結(jié)構(gòu)組件有大大的挑戰(zhàn)性，在電纜敷設(shè)上更有著多重考量。為使卷筒與電動(dòng)機(jī)間的電纜在卷筒轉(zhuǎn)動(dòng)過(guò)程中不出現(xiàn)相對(duì)運(yùn)動(dòng)，在卷筒內(nèi)設(shè)計(jì)了電刷和滑環(huán)，這一裝置在一定情況下可能產(chǎn)生火花，當(dāng)空氣中含有一定濃度的瓦斯時(shí)，就會(huì)燃燒或爆炸，所以卷筒要具有耐爆性和不傳爆性。

The application environment of underground loader is special, which not only challenges its mechanical structure components, but also has multiple considerations in cable laying. In order to prevent the cable between the drum and the motor from relative movement during the rotation of the drum, brushes and slip rings are designed in the drum. This device may produce sparks under certain circumstances. When the air contains a certain concentration of gas, it will burn or explode. Therefore, the drum must have explosion resistance and non explosion transmission.

耐爆性是指卷筒外殼的強(qiáng)度，當(dāng)卷筒內(nèi)部發(fā)生爆炸時(shí)，應(yīng)使其不發(fā)生變形和損壞，不致使爆炸火焰直接點(diǎn)燃礦井中的瓦斯混合物，從而達(dá)到耐爆要求，它是由外殼的材質(zhì)和機(jī)械結(jié)構(gòu)強(qiáng)度來(lái)保證的。

Explosion resistance refers to the strength of the drum shell. In case of explosion inside the drum, it shall not be deformed and damaged, so as not to cause the explosion flame to directly ignite the gas mixture in the mine, so as to meet the explosion resistance requirements. It is guaranteed by the material and mechanical structure strength of the shell.

根據(jù)材料力學(xué)及實(shí)驗(yàn)結(jié)果，對(duì)于鋼板外殼，理論上厚度為3～4mm，鑄鐵為6mm。不傳爆性是指甲烷與空氣混合物在內(nèi)部爆炸時(shí)，火花不會(huì)傳到殼體外部，因而也就不會(huì)引起殼外可燃?xì)怏w的爆炸，這一點(diǎn)可通過(guò)外殼裝配接合面的寬度L、臨界間隙dkp和加工表面精度來(lái)保證。

According to the material mechanics and experimental results, the theoretical thickness of steel plate shell is 3 ~ 4mm and cast iron is 6mm. Non explosive property means that when the mixture of methane and air explodes inside, the spark will not be transmitted to the outside of the shell, so it will not cause the explosion of combustible gas outside the shell. This can be ensured by the width l of the shell assembly joint surface, the critical gap DKP and the machining surface accuracy.