CN-117515170-B - Plate valve type exhaust valve and method for ram air inlet

CN117515170BCN 117515170 BCN117515170 BCN 117515170BCN-117515170-B

Abstract

The invention discloses a plate valve type exhaust valve for a ram air inlet and a method. The valve comprises a valve shell, wherein a large plate, a small plate and an auxiliary plate are respectively arranged at an air vent of the valve shell, the large plate is hinged with the valve shell through a large plate rotating shaft, the small plate is hinged with the valve shell through a small plate rotating shaft, the auxiliary plate is positioned above the large plate and is hinged with the large plate through an auxiliary plate rotating shaft, large plate protruding blocks and auxiliary plate protruding blocks which are mutually abutted are respectively arranged at the positions of the large plate and the auxiliary plate, a tension spring is arranged between the large plate and the auxiliary plate, the valve shell is hinged with a first connecting rod, the first connecting rod is hinged with a second connecting rod through a first connecting rod output rotating shaft, the second connecting rod is hinged with the small plate through a second connecting rod output rotating shaft, the small plate is hinged with a third connecting rod through a small plate output rotating shaft, and the third connecting rod is hinged with the large plate through a third connecting rod output rotating shaft. The invention has various functions and low cost.

Inventors

ZHANG JIANWEI
LIU YINGLONG
SONG ZHAOJIE
LIU YUNGE
LI SHUAITAO
REN SHIHAO
WANG CONG
Cui Benqing
CHEN KANG

Assignees

新乡航空工业(集团)有限公司

Dates

Publication Date: 20260512
Application Date: 20231017

Claims (8)

1. A plate valve type exhaust valve for a ram air inlet is characterized by comprising a valve shell (1), wherein a large plate (13), a small plate (6) and an auxiliary plate (14) are respectively arranged at an air vent of the valve shell (1), the large plate (13) is hinged with the valve shell (1) through a large plate rotating shaft (10), the small plate (6) is hinged with the valve shell (1) through a small plate rotating shaft (7), the auxiliary plate (14) is arranged above the large plate (13) and is hinged with the large plate through an auxiliary plate rotating shaft (12), the large plate (13) and the auxiliary plate (14) are further provided with a large plate lug (13 a) and an auxiliary plate lug (14 a) which are mutually abutted, a tension spring (15) is further arranged between the large plate (13) and the auxiliary plate (14), the valve shell (1) is hinged with a first connecting rod (2), the first connecting rod (2) is hinged with a second connecting rod (4) through a first connecting rod output rotating shaft (3), the second connecting rod (4) is hinged with the small plate (6) through a second connecting rod (5), the small plate (6) is hinged with the large plate through a third connecting rod (9) and the small plate (9) is hinged with the third connecting rod (9) through a third connecting rod (9).
2. Plate valve type exhaust valve for ram air inlet according to claim 1, characterized in that the vent side wall of the valve housing (1) is provided with a changeover pin (16), the side edge of the bottom surface of the auxiliary plate (14) is provided with a guide groove (14 c), and the guide groove (14 c) is brought into abutment with the changeover pin (16) when the auxiliary plate (14) is rotated 90 ° around the large plate rotation shaft (10).
3. The plate valve exhaust valve for ram air inlet according to claim 1, characterized in that the torque generated by the tension spring (15) on the auxiliary plate (14) in the initial state is opposite to the torque generated by the tension spring (15) on the auxiliary plate (14) when the switching pin (16) is located at the bottom of the guide groove (14 c).
4. Plate valve type exhaust valve for ram air inlet according to claim 1, characterized in that the large plate (13) is provided with large plate side walls (13 c) on both sides of its bottom surface.
5. A method of using a plate valve type exhaust valve according to any one of claims 1 to 4, wherein in a normal state, the vent hole of the valve housing (1) is used as an exhaust passage, the large and small plates rotate around the rotation axes of the large and small plates in opposite directions respectively under the linkage of the first, second and third connecting rods, and simultaneously the large plate projection (13 a) and the auxiliary plate projection (14 a) are always engaged under the action of the tension spring (15) so that the auxiliary plate (14) rotates synchronously with the large plate (13).
6. The use according to claim 5, characterized in that the rotation angle of the large plate (13) is 0 ° to 90 ° when the vent of the shutter housing (1) is used as the vent channel.
7. The method according to claim 5, characterized in that the vent opening of the flap housing (1) is used as a bleed air channel in the event of a malfunction of the engine or bleed air system, in which case the rotation angle of the large plate (13) about the large plate rotation axis (10) is greater than 90 °, the spade-like structure formed by the large plate (13) and the large plate side wall (13 c) guides the air flow into the cabin along the vent opening located in front of the large plate (13), in that the large plate projection (13 a) and the auxiliary plate projection (14 a) are disengaged under the action of the guide groove (14 c) and the switching pin (16), and in that the auxiliary plate (14) rotates about the auxiliary plate rotation axis (12) to close the vent opening located behind the large plate (13).
8. Use according to claim 7, characterized in that the maximum rotation angle of the large plate (13) around the large plate rotation axis (10) is 120 ° when the vent opening of the shutter housing (1) is used as a bleed air channel.

Description

Plate valve type exhaust valve and method for ram air inlet Technical Field The invention belongs to the technical field of aircraft cabin pressure control, and particularly relates to a plate valve type exhaust valve for a ram air inlet and a method. Background The exhaust valve is a main actuating mechanism of the cabin pressure control system, the air entraining system continuously supplies air to the cabin, and the exhaust flow is regulated by driving the opening of the exhaust valve, so that the cabin pressure is controlled, and passengers are in a comfortable pressure environment. When the aircraft is at high-altitude cruising, the failure of the engine or the bleed air system can lead to the lack of sufficient fresh air to enter the passenger cabin, the oxygen content of the passenger cabin is reduced, the discomfort and even life-threatening of passengers can be caused, and at present, the fresh air can enter the passenger cabin only when the external atmospheric pressure is greater than or equal to the cabin pressure, but the pressure reduction can be caused by the decompression of the passenger cabin in high altitude, so that the exhaust valve which can be used as a ram air inlet when the engine or the bleed air system is in failure is needed, and the exhaust valve can enter the passenger cabin when the external atmospheric pressure is smaller than the cabin pressure. At present, the exhaust valve is divided into a butterfly valve type and a plate valve type, wherein the butterfly valve is generally arranged in a cabin and cannot be used as a ram air inlet, the plate valve is arranged on an aircraft skin and is an interface between a cabin and the atmosphere, but the maximum opening degree of the valve plate is 90 degrees at present, and external air flow cannot be introduced into the cabin. Disclosure of Invention The invention aims to provide a plate valve type exhaust valve for a ram air inlet and a method. The invention has various functions and low cost. The plate valve type exhaust valve for the ram air inlet comprises a valve shell, wherein a large plate, a small plate and an auxiliary plate are respectively arranged at an air vent of the valve shell, the large plate is hinged with the valve shell through a large plate rotating shaft, the small plate is hinged with the valve shell through a small plate rotating shaft, the auxiliary plate is positioned above the large plate and is hinged with the large plate through an auxiliary plate rotating shaft, large plate lugs and auxiliary plate lugs which are mutually abutted are respectively arranged at the positions of the auxiliary plate rotating shaft, a tension spring is further arranged between the large plate and the auxiliary plate, the valve shell is hinged with a first connecting rod, the first connecting rod is hinged with a second connecting rod through a first connecting rod output rotating shaft, the second connecting rod is hinged with the small plate through a second connecting rod output rotating shaft, the small plate is hinged with a third connecting rod through a third connecting rod output rotating shaft, and the third connecting rod is hinged with the large plate. In the plate valve type exhaust valve for the ram air inlet, the side wall of the vent hole of the valve shell is provided with the conversion pin, the side edge of the bottom surface of the auxiliary plate is provided with the guide groove, and when the auxiliary plate rotates 90 degrees around the rotating shaft of the large plate, the guide groove is in butt joint with the conversion pin. In the plate valve type exhaust valve for the ram air inlet, the torque generated by the tension spring on the auxiliary plate in the initial state is opposite to the torque generated by the tension spring on the auxiliary plate when the conversion pin is positioned at the bottom of the guide groove. In the plate valve type exhaust valve for the ram air inlet, the side walls of the large plate are arranged on the two side edges of the bottom surface of the large plate. A method for using the plate valve type air exhausting valve includes such steps as using the air vent of valve casing as air exhausting channel, linking the first, second and third connecting rods, rotating the big and small plates around their axle, and synchronously rotating the auxiliary plate. In the use method, when the vent of the valve shell is used as the exhaust channel, the rotation angle of the large plate is 0-90 degrees. In the using method, when the engine or the air entraining system fails, the air vent of the valve shell is used as an air entraining channel, the rotation angle of the large plate around the large plate rotating shaft is larger than 90 degrees, the shovel-shaped structure formed by the large plate and the side wall of the large plate guides air flow into the cabin along the air vent positioned in front of the large plate, the large plate protruding block and the auxiliary plate protru