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1 蒸汽机车回动手把标示板上的刻度,应当能准确地反映实际遮断比。但是,由于确定这些刻度的方法尚有缺点,多数运用中的机车没有达到这个要求。譬如:机车厂在修理或制造机车时,根据统一的刻度样板进行刻划,由于回动装置的安装位置与原设计位置总有错移,刻度是难以与实际遮断比相符的;在段修机车时,是按传统的“测定遮断点”方法校对,由于该方法未能充分注意到主曲拐销与十字头的固有的运动关系,不能把前后汽口遮断比不同这一特性在标示板上反映出来。传统的“测定遮断点”方法,见人民铁道出版社1977年8月版《蒸汽机车》上册第137页,以下简称传统法。运用传统法
1 steam locomotive handle on the return sign on the scale, should be able to accurately reflect the actual cut off ratio. However, because of the shortcomings of the method of determining these scales, the majority of locomotives in operation did not meet this requirement. For example, when a locomotive depot repairs or manufactures a locomotive, it is scored according to a uniform scale model. Since the installation position of the returning device is always offset from the original design position, the scale is hard to match with the actual interception ratio. , Is based on the traditional “determination of the cut-off point” method of proofreading, due to the method fails to fully aware of the main crank and the crosshead of the inherent movement of the relationship between the front and rear port can not be cut off than this feature on the sign board Reflected. The traditional method of “measuring the point of obstruction” can be found in page 137 of the volume book of the September 1977 edition of People’s Railway Publishing House, “Steam Locomotive”, hereinafter referred to as the “Traditional Law”. Use traditional method