上一讲详细讨论了不可修设备可靠性的主要数量指标——F(t)、R(t)与θ。这一讲在介绍可修设备的情形后,对煤矿机电设备可靠性的数量指标作一总结。一、故障间隔时间分布与可靠度图1为某采煤机运行记录。图中x_1,x_2,…,x_(57)为其故障间隔时间(即无故障工作时间),括号中数字为实测值。Y_1,Y_2,…,Y_(?)为采煤机的修理时间,各记录57次。统计57个x(?)的值落入表1各组的频数M_i,计 The previous talk discussed in detail the main quantitative indicators of unreliable equipment reliability - F (t), R (t) and θ. After introducing repairable equipment, this talk summarizes the quantitative indicators of the reliability of coal mine electromechanical equipment. First, the breakdown interval time distribution and reliability Figure 1 for a shearer operation record. In the figure, x_1, x_2, ..., x_ (57) is the time between failures (that is, the working hours before failure). The numbers in parentheses are the measured values. Y_1, Y_2, ..., Y_ (?) Are the repair times of shearer, each record 57 times. Statistics 57 x (?) Values ​​fall into the frequency of each group in Table 1 M_i, total