| 摘要 |
<p>An environmental control system, includes an air cycle machine, 100, for conditioning an interior space with cooling air, the air cycle machine including a fan coupled to a shaft, 125, that rotates about a shaft axis, 300, the fan being located at a distal end of the air cycle machine; a speed sensor module, 105, having a speed sensor, 135, for sensing a rotational speed of the shaft; wherein the speed sensor module, 105, includes an outer portion, 305, having a first bore, 308, aligned on the shaft axis, an intermediate portion, 310, having a second bore, 313, aligned on the shaft axis, and an inner portion, 315, aligned on the shaft axis; and a diffuser assembly, 110, including a cylindrical assembly for ducting a first portion of the cooling air to an inlet side of the fan and for communicating a second portion of the cooling air directly to a discharge side of the fan without passing the inlet side.</p> |
