Artículos relacionados a Text Book on Motor Car Engineering Volume 2
Sinopsis
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 Excerpt: ...and these carried only as far as is necessary to give a clear passageway for the oil. Oil-throwers, for preventing the oil from travelling along the shaft at the rear end and giving a dirty appearance to the engine, may be provided either by cutting a vee groove round an enlarged portion of the shaft, or by forming a ring upon the surface of the shaft immediately after the end-bearing and within the crankcase (see Fig. 4). At the front end of the shaft the timing pinion will be fitted as well as the dogs for starting up the engine. Two arrangements are shown in Figs. 4 and 9. The construction adopted at the rear end of the shaft will depend largely upon the method of attachment of fly-wheel and the form of clutch employed. These receive attention later. 105. General Design of Crankshafts.--Crankshafts are subjected 22.--Stress Diagram for Shafts under Torsional Stress. in working to both bending and tension--bending due to the load upon the piston and torsion from the torque transmitted--so that before the methods of design are proceeded with it would be well to examine the conditions which exist in a shaft subject to such straining actions, in order that the basis upon which various formulae used by engineers in the design of crankshafts are founded may be better understood. When a shaft is loaded by a single load the fibres are stretched on one side of the beam and compressed on the opposite side, inducing tensile and compressive stresses (normal stresses) in the material on either side of the neutral axis. In addition there are shear stresses induced in the material in a plane at right angles to the neutral axis but which are zero at the point of application of the load, that is, where the tensile and compressive stresses are a maximum, so need not be co...
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Reseña del editor
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 Excerpt: ...and these carried only as far as is necessary to give a clear passageway for the oil. Oil-throwers, for preventing the oil from travelling along the shaft at the rear end and giving a dirty appearance to the engine, may be provided either by cutting a vee groove round an enlarged portion of the shaft, or by forming a ring upon the surface of the shaft immediately after the end-bearing and within the crankcase (see Fig. 4). At the front end of the shaft the timing pinion will be fitted as well as the dogs for starting up the engine. Two arrangements are shown in Figs. 4 and 9. The construction adopted at the rear end of the shaft will depend largely upon the method of attachment of fly-wheel and the form of clutch employed. These receive attention later. 105. General Design of Crankshafts.--Crankshafts are subjected 22.--Stress Diagram for Shafts under Torsional Stress. in working to both bending and tension--bending due to the load upon the piston and torsion from the torque transmitted--so that before the methods of design are proceeded with it would be well to examine the conditions which exist in a shaft subject to such straining actions, in order that the basis upon which various formulae used by engineers in the design of crankshafts are founded may be better understood. When a shaft is loaded by a single load the fibres are stretched on one side of the beam and compressed on the opposite side, inducing tensile and compressive stresses (normal stresses) in the material on either side of the neutral axis. In addition there are shear stresses induced in the material in a plane at right angles to the neutral axis but which are zero at the point of application of the load, that is, where the tensile and compressive stresses are a maximum, so need not be co...
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