Mechanics Applied to EngineeringLongmans, Green and Company, 1904 - 770 страници |
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Страница 55
... is the arrangement of an ordinary lever safety - valve , where P is the pressure on the valve . The weight of the levers may be taken into account by the method already shown . Allowing for weight of lever . Bell - crank levers Moments .
... is the arrangement of an ordinary lever safety - valve , where P is the pressure on the valve . The weight of the levers may be taken into account by the method already shown . Allowing for weight of lever . Bell - crank levers Moments .
Страница 56
John Goodman. Allowing for weight of lever . Bell - crank levers . Neglecting weight of lever . a FIG . 67 . w2 W3 w3l ; = w1l ; + Wala R a 至 w , FIG . 68 . a W2ly + w3l3 = W11 + w1 ? WI + w12ly = w1h W FIG . 69 . FIG . 70 . W3 = FIG ...
John Goodman. Allowing for weight of lever . Bell - crank levers . Neglecting weight of lever . a FIG . 67 . w2 W3 w3l ; = w1l ; + Wala R a 至 w , FIG . 68 . a W2ly + w3l3 = W11 + w1 ? WI + w12ly = w1h W FIG . 69 . FIG . 70 . W3 = FIG ...
Страница 57
... crank lever be fitted with a knife- edge , and the weights travel along , as in some types of testing - machines , the resultant does not always pass fairly through the knife - edge , thus- which tends to make the knife - edge slide ...
... crank lever be fitted with a knife- edge , and the weights travel along , as in some types of testing - machines , the resultant does not always pass fairly through the knife - edge , thus- which tends to make the knife - edge slide ...
Страница 119
... crank which revolves about a , and let the force be in the direc- FIG . 141 . d C Then , if b tion of the connecting ... crank in order to prevent it following the dotted line . This force acting along the crank is readily found by ...
... crank which revolves about a , and let the force be in the direc- FIG . 141 . d C Then , if b tion of the connecting ... crank in order to prevent it following the dotted line . This force acting along the crank is readily found by ...
Страница 120
... crank , viz . de , which in this instance is a compression . Hence the path of is determined by the force acting along the connecting - rod and the force acting along the crank . The constraining forces always have to be supplied by the ...
... crank , viz . de , which in this instance is a compression . Hence the path of is determined by the force acting along the connecting - rod and the force acting along the crank . The constraining forces always have to be supplied by the ...
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acceleration angle angular velocity balance weight balls beam bearing bending bending moment bending-moment diagram body Calculate cent centre of gravity centrifugal circle coefficient compression connecting-rod constant crank Crown 8vo curve cylinder deflection diameter direction distance efficiency elastic limit ELEMENTARY energy engine equal feet per second Find flange flywheel force acting given governor hence horizontal Illustrations increase inertia length load material maximum mechanism metal method moment of inertia neutral axis orifice parallel pipe piston plane plate polygon pressure pulley pump R₁ radius of gyration ratio revolutions per minute rivets rotation shaft shear shear stress shown in Fig side speed square inch strain stress stroke strut surface tangent tensile tensile stress tension tons per square triangle turbine V₁ valve vanes varies vertical virtual centre W₁ Watt governor wheel Young's modulus
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