| 摘要 |
A gas sealing system in a rotary heat exchanger comprising a matrix 10 rotating in a housing 14 and having at least two sets of entry and exit ducts 22, 22', 24, 24' facing opposite ends of the matrix 10, the gas sealing system comprising a controlled end clearance 50 between an end face of the rotating matrix 10 to prevent leakage of fluid between end faces of the matrix 10, the end clearance 50 being controlled by a bearing assembly comprising a bearing 52 sandwiched between a first flange 54 fixed to an end of the matrix 10 and a second flange 56 that is urged towards the first flange 54 by a spring 62 and permits the bearing 52 and flanges 54, 56 to move axially as an integral unit due to progressive movement of the matrix 10 (thermal expansion) or dynamic shaking (vibrations) of the matrix 10 under resonance conditions to maintain the end clearance constant while being subjected to pulsating pressures. Bearing 52 may be balls, tapered or tapered plain bearing (53, fig 5). Second flange 56 may form part of the housing 14 (fig 3) provided with tension springs (64) constructed as bellows holding the bearing assembly together. The matrix 10 may be rotated by pulleys (72, 74, fig 4) and a belt (76) wrapped around the matrix 10 or a ring gear mounted on the perimeter of the matrix 10. Inlet and outlets 22 - 24' may be connected to flexible telescopic pipes. |
