Diesel Engine Design

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1919 edition. Excerpt: ...where the cylinders are secured to the crank-case by a studded flange the staybolts if fitted at all may be made considerably lighter, according to judgment or the results of experiment. Other points to be considered in designing a crank-case are:--(1) The provision of oil-tight access doors of ample size for overhauling the bottom ends. (2) End casings provided with oil flingers, stuffing boxes, or other means of preventing the escape of oil. (3) Facings, and other necessary accommodation for valve gear. (4) Bosses to carry lubrication oil connections to the main bearings. (5) Facings for platform brackets. (6) A vent pipe or valve of large area, to relieve pressure in the event of an explosion in the crank-case without loss of lubricating oil during normal working. (7) Steady pins to each section of the case, to fix correct location. Machining the Framework generally.--In designing all parts of an engine the designer will keep in mind the capabilities and limitations of the manufacturing plant and the operatives. This is especially necessary in the case of the framework, on account of the relatively large size of the parts. Where the most modern type of face milling plant is available the element of size offers no difficulties, and bedplates of 60 feet in length may be faced in one operation. Where planing must be resorted to the capacity of the machines must be studied in the early stages of the design. Machined faces should be arranged in as few different planes as possible, and ribs or flanges projecting beyond those planes are to be avoided as much for convenience in machining as for the sake of appearances. The simpler forms of girder or box-girder construction are to be preferred to those designs in which alternate perforation by...