FIELD: manufacture of fans; designing roof fans working in hot gases; fire- fighting technique. SUBSTANCE: fan with impeller, blade system, inlet manifold and electric drive with protective casing is provided with heat shield mounted between electric drive and impeller; it is also provided with additional impeller projecting radially beyond clearance limits of electric drive; additional impeller is secured on shaft of electric drive on side opposite to main impeller. Additional impeller embraces cylindrical guide branch pipe mounted inside protective casing of electric drive. EFFECT: increased service life of fan. 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| ROOF VENTILATOR FOR SMOKE REMOVING | 1999 |
|
RU2160392C2 |
| CENTRIFUGAL ROOF FAN | 1999 |
|
RU2160393C2 |
| SMOKE REMOVING AXIAL FLOW FAN | 2000 |
|
RU2186254C2 |
| HOT GASES TRANSFERRING CENTRIFUGAL FAN | 1998 |
|
RU2157470C2 |
| SMOKE EVACUATING FAN | 1998 |
|
RU2157471C2 |
| CEILING CENTRIFUGAL FAN | 1998 |
|
RU2157469C2 |
| THERMAL FAN | 1998 |
|
RU2124168C1 |
| CENTRIFUGAL FAN | 1998 |
|
RU2124651C1 |
| RADIAL-FLOW FAN | 1998 |
|
RU2124144C1 |
| CENTRIFUGAL FAN | 1998 |
|
RU2124652C1 |
