DEVICE FOR CONTROLLING GAS STREAM, AFTER-TREATMENT SYSTEM OF EXHAUST GASES AND PROPULSION SYSTEM FOR MEANS OF TRANSPORT Russian patent published in 2017 - IPC F01D17/16 F02B47/08 F04D17/10 F04D27/00 

FIELD: transportation.

SUBSTANCE: control device of gas flow in a channel comprises a plurality of turning blades (27, 28). The rotation axes of the first and the second adjacent blades (27, 28) are spaced apart so that the rear edge (47) of the first blade (27) overlaps the front edge (48) of the second blade (28), when the first and the second adjacent blades (27, 28) are in the first mutual extreme position for substantial restriction of the gas flow in the channel. The second blade (28) has a recess (49) of such shape that the rear edge (47) of the first blade (27) at least partially enters the recess, when the first and the second adjacent blades (27, 28) are in the first mutual extreme position, so that the recess (49) in the second blade (28) and the rear edge (47) of the first blade (27) are made with the possibility to form a substantially constant gap between the opposed mutually facing surfaces in the blades (27, 28) position within tolerance, when the first and the second blades are in the first mutual extreme position.

EFFECT: providing the reliable operation of the device.

27 cl, 11 dwg