| 摘要 |
FIELD: machine building. ^ SUBSTANCE: invention is related to the field of machine building and may be used in belt-block brakes of draw works. Method for control of specific loads consists in the fact that depending on diametre of brake wheel and wrapping angle of its working surface in specified friction units, ratio is defined between coefficients of mutual overlapping. Coefficients of mutual overlapping are characterised with areas of working surfaces overlapping in tight and slack strands of brake wheel working surface belt. Ratio of mutual overlapping coefficients is equal to ratio of specific loads developed in strand pads. Value of specific loads ratio is used to decide how many more pads should be there on tight strand of belt compared to the slack one. In order to determine permanent pitch between friction pads, on every strand of belt in its ends pad is installed, and in its middle part - pad, halves of which are related to the end of tight strand and beginning of belt slack strand. Afterwards equal wrapping arcs of strands are determined. Length of tight and slack strands pads are distracted from common length of wrapping arc and divided into number of gaps between strands. ^ EFFECT: improved performance parametres of friction units in belt-block brakes, and also increased resource of pads, by control of specific loads redistribution between strands of brake belt due to variation of interaction areas on them, ie number of pads that have different permanent gaps in every belt strand. ^ 2 cl, 7 dwg |
