A Textbook on Marine Engineering ...: Steam and Steam Boilers, Steam Engines, the Machinery of Western River Steamboats, Recent Developments in Marine EngineeringInternational textbook Company, 1900 |
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Σελίδα 171
... driven . The revolutions of any two pulleys over which a belt is run vary in an inverse proportion to their diameters ; con- sequently , if a pulley of 20 inches in diameter is driven by one of 10 inches in diameter , the 20 - inch ...
... driven . The revolutions of any two pulleys over which a belt is run vary in an inverse proportion to their diameters ; con- sequently , if a pulley of 20 inches in diameter is driven by one of 10 inches in diameter , the 20 - inch ...
Σελίδα 172
... driven ; N = number of revolutions of the driver ; n = number of revolutions of the driven . The words revolutions per minute are frequently abbrevi- ated to R. P. M. 496. To find the diameter of the driving pulley when the diameter of ...
... driven ; N = number of revolutions of the driver ; n = number of revolutions of the driven . The words revolutions per minute are frequently abbrevi- ated to R. P. M. 496. To find the diameter of the driving pulley when the diameter of ...
Σελίδα 173
... driven pulley equals the product of the diameter and the number of revolu tions of the driver divided by the diameter of the driven pulley . That is , EXAMPLE . n = DN d The driver is 13 inches in diameter , and makes 100 revolutions ...
... driven pulley equals the product of the diameter and the number of revolu tions of the driver divided by the diameter of the driven pulley . That is , EXAMPLE . n = DN d The driver is 13 inches in diameter , and makes 100 revolutions ...
Σελίδα 174
... driven wheels , and d ,, da , d ,, etc. , the diameters of the different drivers , we have the following : Rule 85. - The continued product of the power and the radii of the driven wheels equals the continued product of the weight , the ...
... driven wheels , and d ,, da , d ,, etc. , the diameters of the different drivers , we have the following : Rule 85. - The continued product of the power and the radii of the driven wheels equals the continued product of the weight , the ...
Σελίδα 180
... driven ; T number of teeth in the driver ; t = number of teeth in the driven . Rule 89. — The number of teeth in the driver equals the product of the number of teeth and number of revolutions of the driven divided by the number of ...
... driven ; T number of teeth in the driver ; t = number of teeth in the driven . Rule 89. — The number of teeth in the driver equals the product of the number of teeth and number of revolutions of the driven divided by the number of ...
Συχνά εμφανιζόμενοι όροι και φράσεις
angle ash pit base belt body carbon cast iron center of gravity cipher circle circumference cock column combustion cube cubic foot cubic inches cylinder decimal places denominator distance divided dividend divisor driven engine equal evaporated EXAMPLE.-What EXAMPLES FOR PRACTICE feed-water feet figure fire flue force fraction frustum furnace gauge given grate Hence horsepower hotwell hydrogen inches in diameter iron kinetic energy lap joint length lever load minuend multiplied number of revolutions number of teeth oxygen piston pitch plate pounds of water pounds per square pressure allowed pulley pump quantity quotient ratio revolutions per minute rivets rope rule safety valve shaft shell shown in Fig side smokestack SOLUTION SOLUTION.-Applying square inch square root stay staybolts steam pipe steam pressure steel stop-valve subtract temperature tensile strength thickness tubes velocity vessel volume water-tube boilers weight whole number wrought-iron
Δημοφιλή αποσπάσματα
Σελίδα 139 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center.
Σελίδα 151 - Newton's Three Laws of Motion," and are as follows: I. All bodies continue in a state of rest, or of uniform motion in a straight line, unless acted upon by some external force that compels a change.
Σελίδα 476 - The conditions of the boiler and furnace in all respects should be, as nearly as possible, the same at the end as at the beginning of the test. The steam pressure should be the same, the water level the same, the fire upon the grates should be the same in quantity and condition, and the walls, flues, etc., should be of the same temperature.
Σελίδα 95 - The terms of a ratio are the two numbers to be compared ; thus, in the above ratio, 20 and 4 are the terms. When both terms are considered together, they are called a couplet ; when considered separately, the first term is called the antecedent, and the second term the consequent. Thus, in the ratio 20 : 4, 20 and 4 form a couplet, and 20 is the antecedent, and 4 the consequent.
Σελίδα 121 - If a straight line be drawn through two sides of a triangle, parallel to the third side, a second triangle will be formed whose sides will be proportional to the corresponding sides of the first triangle.
Σελίδα 99 - The first and fourth terms of a proportion are called the extremes, and the second and third terms, the means. Thus, in the foregoing proportion, 8 and 3 are the extremes and 4 and 6 are the means.
Σελίδα 12 - The number thus added to itself, or the number to be multiplied, is called the multiplicand. The number which shows how many times the multiplicand is to be taken, or the number by which we multiply, is called the multiplier.
Σελίδα 478 - The boiler should be run continuously, without stopping for meal times or for rise or fall of pressure of steam due to change of demand for steam. The draught being adjusted to the rate of evaporation or combustion desired before the test is begun, it should be retained constant during the test by means of the damper. If the boiler is not connected to the same steam pipe with other boilers, an extra outlet for steam with valve in same should...
Σελίδα 154 - In a moving body, the line described by its center of gravity is always taken as the path of the body. In finding the distance that a body has moved, the distance that the center of gravity has moved is taken.
Σελίδα 475 - ... calculation of the results of the test corrected accordingly. Wherever possible, the test should be made with standard coal of a known quality. For that portion of the country east of the Alleghany Mountains, good anthracite egg coal or Cumberland semibituminous coal may be taken as the standard for making tests. West of the Alleghany Mountains and east of the Missouri River, Pittsburg lump coal may be used.