| 摘要 |
<p>A warp resistant fuel feed door assembly (10) for use in injecting supplemental fuel into a high temperature combustion chamber such as a rotating cement kiln (16) without substantial loss of heat or combustion gases. The apparatus, which is positioned on the exterior side of a fuel passage (18) transecting the wall of a rotating kiln (16), opens to receive fuel and then seals during the balance of the rotation of the kiln. Warping, bearing fracture, shaft distortion and jamming due to exposure to extreme heat and cooling are minimized by the sectional construction of the doors (12a, 12b). The door includes a plate (22a, 22b) positioned over the mouth of the passage, a plurality of support arms (110, 112, 114, 116) attached to the plate and a hinge shaft attached to the arms. Stresses on the door structure from inconsistent expansion of the plate are reduced due to symmetrically space oblong and oversized bolt attachment bores in the support arms. Synchronous opening of the feed doors is achieved by levered rotation of the hinge shafts by an electric motor. Selective introduction of supplemental fuel into a rotating kiln can be controlled by electrical actuation of the feed doors.</p> |
