The steam engine indicator by Low F. R. (Frederick Rollins) 1860-

Author:Low, F. R. (Frederick Rollins), 1860-
Language: eng
Format: epub, pdf
Tags: Indicators for steam-engines
Publisher: New York : McGraw-Hill Book Co.
Published: 1910-03-25T05:00:00+00:00

thump, and it is only by changing, the pressure gradually from one side to the other that we can make it run smoothly. When the piston is at the point in the stroke indicated at al, there is behind it the pressure /c, and no pressure but that of the atmosphere in front of it. As it moves along, the pressure behind it decreases while at d the pressure in front .of ,it begins to increase, and at e the pressures on both sides are equal. After this the pressure in front exceeds that behind the piston, but the change is gradual, the direction of thrust is changed under a slight difference of pressure, and when the steam is admitted the bearings and journals are already firmly pressed against the surfaces upon which they are to bear. In addition to the steam pressure moving the piston forward there is the momentum of the moving parts to be reckoned with.

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