Motor-driven chimney draft system and an impeller for use in the system

摘要

Impeller for a motor-driven chimney draft system, comprising a flue gas impeller (10) for creating, in a flue gas passage, a draft in a flue gas downstream direction. A flue gas deflector disk (20) is situated downstream relative to the flue gas impeller (10) and connected to the flue gas impeller (10); and a hub for connecting the impeller to an end portion of a driving shaft of a motor (100), wherein the hub and the end portion of the driving shaft, when connected, are both situated downstream relative to the flue gas deflector disk (20), the hub indirectly connected to the flue gas deflector disk (20) by means of intermediate members. Advantageously the intermediate members are impeller blades (40) connected to the downstream side of the flue gas deflector disk (20) and to a venting disk (30) with venting holes (31, 32) so as to form a turbine.

主权项

1. An impeller for a motor-driven chimney draft system, the impeller comprising:
a flue gas impeller for creating, in a flue gas passage, a draft in a flue gas downstream direction, a flue gas deflector disk for deflecting the flue gas, the flue gas deflector disk situated downstream relative to the flue gas impeller and connected to the flue gas impeller, a venting disk with venting holes therein and arranged at the downstream side of the flue gas deflector disk and at a distance therefrom so as to define a space between the flue gas deflector disk and the venting disk, impeller blades being arranged in the space between the flue gas deflector disk and the venting disk, the impeller blades directly connecting the flue gas deflector disk and the venting disk so as to establish a sole interconnection between the flue gas deflector disk and the venting disk, and a hub for connecting the impeller to an end portion of a driving shaft of a motor, the hub being connected to the venting disk, wherein the hub and the end portion of the driving shaft, when connected, are both situated downstream relative to the flue gas deflector disk, wherein the impeller, when rotating, draws flue gas downstream towards the flue gas deflector disk where it is deflected outwards in a radial direction and through openings in the sides of the system, thereby preventing the flue gases from contacting the driving shaft.