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煤田地质勘探钻机的卷筒由于制动鼓的早期失效而不得不将整个卷简报废,即使工地进行修复,其寿命依然很短,并不能从根本上解决问题。那么,卷筒制动鼓早期失效的原因是什么呢?本文想结合石家庄煤矿机械厂生产的TXB—1000A钻机之卷筒制动鼓的失效进行计算分析。卷筒制动鼓在工作过程中受有机械应力,热应力及磨损。一、机械应力计算公式 1.弯曲应力的计算将制动鼓沿直径AB截开,并作如下假设:(1)当制动时,制动鼓所
Drilling drums for coalfield geological exploration rigs have had to scrap the entire volume due to the early failure of the brake drum. Even if the site is repaired, its life span is still short and it can not fundamentally solve the problem. So, what is the reason of the early failure of drum brake drum? This article intends to combine with the failure of drum brake drum of TXB-1000A drill produced by Shijiazhuang Coal Mine Machinery Factory. Drum drum in the course of the work by mechanical stress, thermal stress and wear. First, the mechanical stress formula 1. Bending stress calculation The brake drum along the diameter AB cut-off, and made the following assumptions: (1) When braking, the brake drum