Abrégé

A bellmouth that enhances the effective longitudinal thrust of a jet fan, by deflecting the flow on the discharge side, minimising flow separation on the inlet side, and reducing or eliminating the underhang of the bellmouth beneath the thickness of the 5 silencer The bellmouth comprises a curve with a variable radius at the distal end of the fan; a curve that is flat or nearly flat; a curve with a variable radius that blends smoothly with the rest of the bellmouth; a straight curve, which is used to deflect the flow on the discharge side in order to reduce the Coanda effect; and a radiused curve which smoothly turns the inlet flow towards the lower part of the silencer.

Classes IPC  ?

• F04D 19/00 - Pompes à flux axial spécialement adaptées aux fluides compressibles
• E21F 1/00 - Ventilation des mines ou tunnelsDistribution des courants de ventilation
• E21F 1/08 - Dispositifs de ventilation relatifs aux conduits d'air, p. ex. agencements de montage des ventilateurs
• F04D 29/54 - Moyens de guidage du fluide, p. ex. diffuseurs
• F04D 29/66 - Lutte contre la cavitation, les tourbillons, le bruit, les vibrations ou phénomènes analoguesÉquilibrage

Abrégé

An aerodynamic spoiler (4) attached to a fraction of the circumference of a bellmouth (3) in order to eliminate separation of the inlet flow in fan assemblies used in ventilating tunnels and other internal spaces.

Classes IPC  ?

• E21F 1/00 - Ventilation des mines ou tunnelsDistribution des courants de ventilation
• F04D 29/54 - Moyens de guidage du fluide, p. ex. diffuseurs
• F04D 25/08 - Ensembles comprenant des pompes et leurs moyens d'entraînement le fluide énergétique étant l'air, p. ex. pour la ventilation

Abrégé

A ventilation device that enhances the effective longitudinal thrust of a fan assembly installed within a tunnel, by arranging vortex generators (2) on the internal surface of a nozzle (1), in order to delay the flow separation from the lower side of a bellmouth (3).

Classes IPC  ?

• F04D 29/44 - Moyens de guidage du fluide, p. ex. diffuseurs
• F04D 29/54 - Moyens de guidage du fluide, p. ex. diffuseurs
• F04D 19/00 - Pompes à flux axial spécialement adaptées aux fluides compressibles

Abrégé

A ventilation device that enhances the effective longitudinal thrust of a fan assembly installed within a tunnel or other internal space. The nozzle trailing edge (6) is tilted so that it forms an angle (13) with respect to the fan centreline (7), with the surface of the nozzle throughbore being non-cylindrical in shape. The discharged flow (5) is turned away from the surrounding surfaces by a convergent-divergent bellmouth (1).

Classes IPC  ?

• F04D 25/08 - Ensembles comprenant des pompes et leurs moyens d'entraînement le fluide énergétique étant l'air, p. ex. pour la ventilation
• E21F 1/00 - Ventilation des mines ou tunnelsDistribution des courants de ventilation
• F04D 29/44 - Moyens de guidage du fluide, p. ex. diffuseurs
• F04D 29/54 - Moyens de guidage du fluide, p. ex. diffuseurs
• F04D 29/60 - MontageAssemblageDémontage

Abrégé

A ventilation device that enhances the effective longitudinal thrust of a fan assembly installed within a tunnel or other internal space. The nozzle trailing edge (6) is tilted so that it forms an angle (13) with respect to the fan centreline (7), with the surface of the nozzle throughbore being non-cylindrical in shape. The discharged flow (5) is turned away from the surrounding surfaces by a convergent-divergent bellmouth (1).

Classes IPC  ?

• E21F 1/00 - Ventilation des mines ou tunnelsDistribution des courants de ventilation
• E21F 1/08 - Dispositifs de ventilation relatifs aux conduits d'air, p. ex. agencements de montage des ventilateurs
• F04D 25/08 - Ensembles comprenant des pompes et leurs moyens d'entraînement le fluide énergétique étant l'air, p. ex. pour la ventilation
• F04D 29/44 - Moyens de guidage du fluide, p. ex. diffuseurs
• F04D 29/54 - Moyens de guidage du fluide, p. ex. diffuseurs
• F04D 29/60 - MontageAssemblageDémontage

Abrégé

A ventilation device that enhances the effective longitudinal thrust of a fan assembly installed within a tunnel or other internal space. The nozzle trailing edge (6) is tilted so that it forms an angle (13) with respect to the fan centreline (7), with the surface of the nozzle throughbore being non-cylindrical in shape. The discharged flow (5) is turned away from the surrounding surfaces by a convergent-divergent bellmouth (1).

Classes IPC  ?

• F04D 29/44 - Moyens de guidage du fluide, p. ex. diffuseurs
• E21F 1/00 - Ventilation des mines ou tunnelsDistribution des courants de ventilation
• E21F 1/08 - Dispositifs de ventilation relatifs aux conduits d'air, p. ex. agencements de montage des ventilateurs
• F04D 29/54 - Moyens de guidage du fluide, p. ex. diffuseurs
• F04D 25/08 - Ensembles comprenant des pompes et leurs moyens d'entraînement le fluide énergétique étant l'air, p. ex. pour la ventilation
• F04D 29/60 - MontageAssemblageDémontage

Produits et services

Industrial ventilation apparatus.

Abrégé

A ventilation device that enhances the effective longitudinal thrust of a fan assembly installed within a tunnel, by turning the discharged flow away from the surrounding tunnel surfaces and tilting the nozzle trailing edge (6) so that it forms an angle (16) to the nozzle centreline (8).

Classes IPC  ?

• F04D 29/54 - Moyens de guidage du fluide, p. ex. diffuseurs
• E21F 1/00 - Ventilation des mines ou tunnelsDistribution des courants de ventilation

Abrégé

A ventilation device that enhances the longitudinal thrust of a fan (2) installed within a tunnel, by the introduction of a convergent nozzle (7) to accelerate the outlet flow (8). An angled transition piece (6) can turn the flow by a specific angle (36). Multiple fans can be connected to common inlet and outlet plenums, supplying one or more convergent nozzles. Bi-directional flow can be achieved by fitting convergent nozzles to both sides of a fan, with bypass dampers optionally installed between the fan and the two nozzles. The nozzle trailing edge can be shaped with multiple lobes, chevrons or tongues, and the fan centrebody can be shaped with multiple lobes. A fire suppression agent such as water mist can be supplied into the ductwork between the fan and the nozzle trailing edge. Acoustic silencing can be achieved using absorbent material on the nozzle and fan centrebody.

Classes IPC  ?

• F04D 29/44 - Moyens de guidage du fluide, p. ex. diffuseurs
• F04D 29/54 - Moyens de guidage du fluide, p. ex. diffuseurs
• E21F 1/00 - Ventilation des mines ou tunnelsDistribution des courants de ventilation