| 摘要 |
<p>An apparatus for and a method of controlling the temperature differential between different surfaces or walls of a structural member such as a hollow box beam, and a structural member whose temperature differential is so controlled. The invention has important utility in the combination in which it controls the temperature differential between the opposite walls of the box beam which conventionally supports the horizontal stripper member used for stripping hot ore pellets or the like from the surface of a grate conveyor or the like since one of the walls of the box beam which supports the horizontal stripper is normally subjected to much higher temperatures than the opposite wall thereof, causing undesirable deflection of the beam. In accordance with an embodiment of the invention, a partition is provided inside the hollow box beam at a predetermined spacing from the hotter wall, whereby to define a cooling chamber for the hotter wall, and cooling air is circulated through the cooling chamber at a predetermined velocity and pressure, whereby to reduce the temperature of the hotter wall and thereby reduce the temperature differential between the two opposite walls of the box beam. Means may be provided for sensing the temperature differential between the opposite walls of the beam and for controlling a variable or variables such as the velocity and pressure of air passing through the cooling chamber as a function of the sensed temperature differential whereby to maintain the temperature differential between the opposite walls at an acceptable value.</p> |
