The advantages of mechanized construction are becoming more and more obvious. Now 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 increasing, which plays a very obvious role in improving underground work efficiency.

井下裝載機(jī)的應(yīng)用環(huán)境比較特殊，不僅對其機(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。為使卷筒與電動機(jī)間的電纜在卷筒轉(zhuǎn)動過程中不出現(xiàn)相對運動，在卷筒內(nèi)設(shè)計電刷和滑環(huán)，這一裝置在一定情況下可能會產(chǎn)生火花，當(dāng)空氣中含有一定濃度的瓦 斯時，就會燃燒或爆 炸，所以卷筒要具有耐爆性和不傳爆性的。

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 drum rotation, 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，應(yīng)使其不發(fā)生變形和損壞，不能出現(xiàn)火焰直接點燃礦井中的瓦 斯混合物情況，從而達(dá)到耐爆的要求，它是由外殼的材質(zhì)和機(jī)械結(jié)構(gòu)強(qiáng)度來保證的。

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

根據(jù)材料力學(xué)及實驗的結(jié)果，對于鋼板外殼，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)部發(fā)生爆 炸時，火花不會傳到殼體的外部，因而也就不會引起殼外可燃?xì)怏w的爆 炸，這一點可通過外殼裝配接合面的寬度L、臨界間隙dkp和加工表面精度來做好保證。

According to the results of material mechanics and experiment, 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 guaranteed by the width l of the shell assembly joint surface, the critical gap DKP and the machining surface accuracy.

機(jī)械設(shè)備的結(jié)構(gòu)特點及材質(zhì)選擇應(yīng)該符合實際應(yīng)用場所的環(huán)境特點，更要結(jié)合工作要求來保障設(shè)備使用的有效性。

The structural characteristics and material selection of mechanical equipment should conform to the environmental characteristics of the actual application site, and should be combined with the work requirements to ensure the effectiveness of equipment use.