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对《煤矿安全》1978年第5期刊登的“关于立井防坠器脱钩试验中抓捕过程的分析”一文,有如下两点需商榷。一、可以认为当抓捕器已可靠的抓握制动绳后,制动力基本不变。该文中“一、脱钩试验中抓捕过程各阶段的分析”一段中的图1(见《煤矿安全》1978,№ 5,31页),作者准备用它来说明脱钩试验抓捕工作的特性,但有如下不当之处:如在 F≥Q 的变速制动阶段中(该文图1误写成 F≤Q 变速制动阶段),即 t_3的后阶段中,该文作者认为,“当动能消耗在制动绳伸长及缓冲绳拉伸之后,制动力逐渐减小,直至与下坠荷重相等、平
The “Coal Mine Safety” No. 5 of 1978 published “on the shaft anti-dropping device detachment test analysis of the arrest process,” a text, the following two points to be discussed. First, you can think that when the arrest has been a reliable grip brake line, the braking force is basically unchanged. The article “Analysis of each stage of the arrest process in the decoupling test” is shown in Figure 1 (see “Coal Mine Safety” 1978, № 5, page 31). The author intends to use it to illustrate the characteristics of the detachment test, However, there are some defects as follows: In the variable-speed braking stage with F≥Q (Fig. 1 falsely written as F≤Qshifting braking stage), that is, the latter stage of t_3, the author believes that "when kinetic energy is consumed After the brake cable is extended and the buffer cable is stretched, the brake force is gradually reduced until equal to the load on the brake pedal