CN114872905A - A damper drive mechanism - Google Patents

Abstract

The invention belongs to the field of structural design of civil airliners, and relates to an air door driving mechanism. The invention can reduce the risk of air door clamping stagnation, prolong the structural life, realize the over-opening of the windproof door, ensure that the air door can be kept in an open or closed state when the actuator does not work, and the windproof door is opened or closed accidentally, and integrate the installation structure of the air door position detection equipment. The invention can reduce the manufacturing and installation difficulty, reduce the risk of air door clamping stagnation and prolong the service life of the structure. The air door can be prevented from being opened too much, and the protection of the air door and the wall plate and other structures near the opening of the air door can be realized. The invention can realize that the air door can be kept in an open or closed state when the actuator does not work, and is not only suitable for the field of structural design of civil passenger planes, but also suitable for similar air door structures in other mechanical design fields.

Description

A damper drive mechanism

technical field

The invention belongs to the field of civil passenger aircraft structure design, and relates to a damper driving mechanism.

Background technique

In the field of civil aircraft structure design, it is necessary to design the driving mechanism for the APU intake air valve and the exhaust air valve of the environmental control system, and use the extension and shortening of the actuator actuating rod to drive the rotation of the air door. The two supporting points of the actuator are usually used. One side of the drive joint, that is, the side of the actuator rod end, adopts a joint bearing, and the side of the actuator support joint does not adopt a fixed form of joint bearing. The manufacturing and installation precision of the actuator support, drive joint, damper rotating shaft support structure, etc. is high, and the damper is easy to get stuck; during the rotation of the damper, there is a gap between the actuator and the rotating shaft at the actuator support. dry friction phenomenon. When the actuator fails, the over-opening of the damper will damage the damper and the wall panels near the damper opening. During inspection and maintenance, the damper needs to be kept open or closed to facilitate the operator's work and protect the operator's safety. During the service of the aircraft, it is necessary for the pilot to confirm whether the throttle is open or closed.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a damper drive mechanism, which can not only reduce the difficulty of manufacture and installation, reduce the risk of damper sticking, and improve the structural life, but also can realize the over-opening of the damper, and ensure that the actuator can be used even when the actuator is not working. Keep the damper in the open or closed state, prevent the damper from being accidentally opened or closed, and integrate the installation structure of the damper position detection device.

The concrete technical scheme of the present invention is as follows:

A damper drive mechanism, comprising an actuator, an actuator support, a drive crank, a left section of a rotary shaft, a middle section of a rotary shaft, a right section of a rotary shaft, a left rotary shaft support beam, a right rotary shaft support beam, a damper, Left gooseneck support and right gooseneck support.

The actuator is supported on the actuator support and the drive crank. The left section of the rotating shaft, the middle section of the rotating shaft, and the right section of the rotating shaft are coaxial, the left section of the rotating shaft is supported on the left rotating shaft support beam, the right section of the rotating shaft is supported on the right rotating shaft support beam, and the middle section of the rotating shaft is installed on the The left section of the shaft and the middle of the right section of the rotating shaft. The left gooseneck support and the right gooseneck support are fixed on the damper. The left gooseneck support is arranged between the flange structures of the left section of the rotating shaft and the middle section of the rotating shaft. It is arranged between the flange structures of the middle section of the rotary shaft and the right section of the rotary shaft. Through the connection between the left gooseneck support and the left section of the rotating shaft and the middle section of the rotating shaft, and the connection between the right gooseneck support and the middle section of the rotating shaft and the right section of the rotating shaft, the left section of the rotating shaft, the middle section of the rotating shaft, the rotating shaft The right section of the shaft is fixedly connected to the rotary shaft of the damper and the damper and its rotary shaft. The drive crank and the left section of the rotary shaft are connected by splines. The actuator drives the drive crank, the drive crank drives the rotary shaft, and the rotary shaft drives the damper. , and finally realize the drive of the actuator to the damper.

The actuators are provided with joint bearings at two support points, and the connection between the actuator and the actuator support adopts the matching standard parts composed of bolts, countersunk washers, flat washers, nuts, split pins 16 and sliding. Bushing implementation.

The actuator support has a double lug structure at the connection with the actuator, one lug is mounted with a flange bushing A, the other lug is mounted with a flanged bushing B, and the flange of the flanged bushing A is located at the between the two lugs of the actuator mount. The sliding bushing is installed in the flange bushing B, the bolts pass through the countersunk washer, the flange bushing A, the upper joint bearing of the actuator, the sliding bushing, the flat washer and the nut in sequence, and the actuator passes along the direction of the rotation axis of the damper. Press the joint bearing on the actuator against the end face of the flange bushing A to achieve the limit. The actuator is designed with a cylindrical convex structure, and a nylon retaining ring is installed on the outer side of the flange of the flange bushing A. There is a designed gap between the cylindrical convex structure and the nylon retaining ring, which prevents the actuator from swinging under the premise that the nylon retaining ring will not limit the actuator along the direction of the damper rotation axis. The connection of the actuator and the drive crank is similar to the connection form of the actuator and the actuator support, the difference is that there is no cylindrical protrusion structure and nylon retaining ring. The joint bearings at the two supporting points of the actuator are self-lubricating bearings, and self-lubricating joint bearings are also installed at the two supporting points of the damper rotating shaft. During the rotation process of the damper, the two supporting points of the actuator and the two supporting points of the damper rotating shaft The inner ring of the self-lubricating spherical plain bearing rotates relative to the outer ring, which avoids the dry friction phenomenon of the damper during the rotation process; the inner and outer rings of the spherical plain bearing can be rotated relative to each other to reduce the manufacturing and installation accuracy and reduce the risk of damper jamming .

The drive crank is designed with a boss structure A, and the left rotating shaft support beam is designed with a boss structure B. When the damper is opened to a certain angle, the boss structure A and the boss structure B are fitted together to prevent the damper from overheating. Open damage to other structures.

A hole is designed on the boss structure B of the drive crank, and a bushing A is installed in the hole; two holes are designed on the left rotating shaft support beam, and the bushing B and the bushing are respectively installed in the two holes. C; When the damper is in the closed state, the inner holes of bushing A and bushing B are coaxial, and the damper can be prevented from accidentally opening by inserting positioning pins into the inner holes of bushing A and bushing B; when the damper is in the open state, bushing A , The inner holes of the bushing C are coaxial, and the damper can be prevented from accidentally closing by inserting a positioning pin into the inner holes of the bushing A and the bushing C.

The damper position detection device is installed on the support beam of the right rotary shaft at the right end of the rotary shaft. .

The beneficial effects of the present invention are as follows:

1) It can reduce the difficulty of manufacturing and installation, reduce the risk of damper sticking, and improve the life of the structure.

2) It can prevent the air door from over-opening, and realize the protection of the air door and the wall panels near the air door opening.

3) The damper can be kept open or closed even when the actuator is not working.

4) During the maintenance process, the damper can be prevented from being accidentally opened or closed.

5) The installation structure of the integrated air door position detection equipment.

6) Simple and compact structure and mature technology.

7) Wide application range. It is not only applicable to the field of civil passenger aircraft structure design, but also to similar damper structures in other mechanical design fields.

Description of drawings

Fig. 1 is the front view of the overall scheme of the present invention;

Fig. 2 is the left side view of the general scheme of the present invention (rotated by 90°);

Fig. 3 is a detailed view of the joint A of the actuator of Fig. 1 and the actuator support according to the present invention;

Fig. 4 is the B-B sectional view of the joint of the actuator of Fig. 3 and the actuator support of the present invention;

Fig. 5 is the schematic diagram of the over-opening of the air-proof door of the present invention (the air door is in the closed state);

FIG. 6 is a schematic diagram of the accidental opening/closing of the windproof door of the present invention (the damper is closed);

FIG. 7 is a C-C sectional view of the installation location of the damper detection device of FIG. 1 according to the present invention.

In the figure: 1 actuator; 2 actuator support; 3 drive crank; 4 left section of rotating shaft; 5 middle section of rotating shaft; 6 right section of rotating shaft; 7 supporting beam of left rotating shaft; 8 supporting beam of right rotating shaft beam; 9 damper; 10 left gooseneck support; 11 right gooseneck support; 12 bolt; 13 countersunk washer; 14 flat washer; 15 nut; 16 cotter pin; 17 sliding bushing; 18 flange bushing A ; 19 flange bushing B; 20 cylindrical raised structure; 21 nylon retaining ring; 22 boss structure A; 23 boss structure B; 24 bushing A; 25 bushing B; 26 bushing C; 27 damper position Detection equipment; 28 damper position probes.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings.

As shown in Figures 1 and 2, a damper driving mechanism includes an actuating structure, an actuator support structure, an over-opening structure for the damper, and a structure for accidentally opening/closing the damper;

The actuating structure includes an actuator 1, an actuator support 2, a drive crank 3, a left section of the rotating shaft 4, a middle section of the rotating shaft 5, a right section of the rotating shaft 6, a left rotating shaft support beam 7, and a right side of the rotating shaft. The rotating shaft supports the beam 8 , the damper 9 , the left gooseneck support 10 and the right gooseneck support 11 .

The actuator 1 is supported on the actuator support 2 and the drive crank 3 . The left section 4 of the rotating shaft, the middle section 5 of the rotating shaft, and the right section 6 of the rotating shaft are coaxial, the left section 4 of the rotating shaft is supported on the support beam 7 of the left rotating shaft, and the right section 6 of the rotating shaft is supported on the support beam 8 of the right rotating shaft , the middle section 5 of the rotating shaft is installed in the middle of the left section 4 of the rotating shaft and the right section 6 of the rotating shaft. The left gooseneck support 10 and the right gooseneck support 11 are fixedly connected to the damper 9. The left gooseneck support 10 is arranged between the flange structures of the left section 4 of the rotating shaft and the middle section 5 of the rotating shaft, and the right The side gooseneck support 11 is arranged between the flange structures of the middle section 5 of the rotating shaft and the right section 6 of the rotating shaft. Through the connection between the left gooseneck support 10 and the left section 4 of the rotating shaft and the middle section 5 of the rotating shaft, and the connection between the right gooseneck support 11 and the middle section 5 of the rotating shaft and the right section 6 of the rotating shaft, the left section of the rotating shaft is realized at the same time. 4. The middle section 5 of the rotating shaft and the right section 6 of the rotating shaft are fixedly connected to the rotating shaft of the damper 9 and the fixed connection of the damper 9 and its rotating shaft. The drive crank 3 and the left section 4 of the rotating shaft are connected by splines, and the actuator 1 The driving crank 3 is driven, the driving crank 3 drives the rotating shaft, and the rotating shaft drives the damper 9 , and finally the actuator 1 drives the damper 9 .

As shown in Figures 3 and 4, the actuator support structure is as follows: the actuator 1 is installed with joint bearings at both support points, and the connection between the actuator 1 and the actuator support 2 adopts It is realized by the matching standard parts composed of bolts 12 , countersunk washers 13 , flat washers 14 , nuts 15 and split pins 16 and sliding bushings 17 .

The actuator support 2 has a double lug structure at the connection point with the actuator 1. A flange bushing A18 is installed on one ear piece, and a flange bushing B19 is installed on the other ear piece. The flange bushing A18 is convex. The rim is located between the two tabs of the actuator mount 2 . The sliding bushing 17 is installed in the flange bushing B19, the bolts 12 pass through the countersunk washer 13, the flange bushing A18, the joint bearing on the actuator 1, the sliding bushing 17, the flat washer 14 and the nut 15 in sequence, and actuate The actuator 1 is limited along the rotation axis direction of the damper 9 by pressing the joint bearing on the actuator 1 against the end face of the flange bushing A18. A cylindrical protrusion structure 20 is designed on the actuator 1, and a nylon retaining ring 21 is installed on the outer side of the flange of the flange bushing A18. There is a designed gap between the cylindrical convex structure 20 and the nylon retaining ring 21, and on the premise that the nylon retaining ring 21 will not limit the actuator 1 along the rotation axis of the damper 9, it prevents the actuator 1 from swinging. . The connection of the actuator 1 and the drive crank 3 is similar to the connection form of the actuator 1 and the actuator support 2, except that there is no cylindrical protrusion structure and nylon retaining ring. The joint bearings at the two supporting points of the actuator 1 are self-lubricating bearings, and the two supporting points of the rotary shaft of the damper 9 are also installed with self-lubricating joint bearings. During the rotation process of the damper 9, the two supporting points of the actuator 1 and the damper 9 The inner ring of the self-lubricating spherical plain bearing rotates relative to the outer ring at the two supporting points of the rotating shaft, which avoids the dry friction phenomenon of the damper during the rotation process; the inner and outer rings of the spherical plain bearing can be rotated relative to each other to reduce the manufacturing and installation accuracy. Reduce risk of damper sticking.

As shown in FIG. 5 , the over-opening structure of the windproof door is as follows: a boss structure A22 is designed on the driving crank 3, and a boss structure B23 is designed on the left rotating shaft support beam 7. When the damper 9 is opened to a certain angle The boss structure A22 and the boss structure B23 are fitted together to prevent the damper 9 from being over-opened and damaging other structures.

As shown in FIG. 6 , the accidental opening/closing structure of the windproof door is as follows: a hole is designed on the boss structure B23 of the driving crank 3, and a bushing A24 is installed in the hole; There are two holes, the bushing B25 and the bushing C26 are respectively installed in the two holes; when the damper 9 is in the closed state, the inner holes of the bushing A24 and the bushing B25 are coaxial, and the inner holes of the bushing A24 and the bushing B25 can pass through the inner holes of the bushing A24 and the bushing B25. Insert a positioning pin in the middle to prevent the damper 9 from accidentally opening; when the damper 9 is in the open state, the inner holes of the bushing A24 and the bushing C26 are coaxial, you can prevent the damper 9 from accidentally closing by inserting a positioning pin into the inner holes of the bushing A24 and the bushing C26 .

As shown in FIG. 6 , the installation structure of the air door position detection device is as follows: the air door position detection device 27 is installed on the right rotating shaft support beam 8 at the right end of the right section 6 of the rotating shaft, and the air door position detection device 27 The probe 28 is an external spline structure, which cooperates with the internal spline structure at the axis of the right section 6 of the rotating shaft.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical scope disclosed by the present invention can easily think of changes or substitutions. All should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (8)

1. A damper drive mechanism, characterized in that it comprises an actuator (1), an actuator support (2), a drive crank (3), a left section of a rotary shaft (4), a middle section of a rotary shaft (5), The right section of the rotating shaft (6), the left rotating shaft support beam (7), the right rotating shaft support beam (8), the damper (9), the left gooseneck support (10) and the right gooseneck support ( 11); The actuator (1) is supported on the actuator support (2) and the drive crank (3); the left section (4) of the rotating shaft, the middle section (5) of the rotating shaft, and the right section (6) of the rotating shaft are the same The left section (4) of the rotating shaft is supported on the left rotating shaft support beam (7), the right section (6) of the rotating shaft is supported on the right rotating shaft supporting beam (8), and the middle section (5) of the rotating shaft is installed on the The middle of the left section (4) of the rotating shaft and the right section (6) of the rotating shaft; the damper (9) is fixedly connected with a left gooseneck support (10), a right gooseneck support (11), and a left gooseneck support The seat (10) is arranged between the flange structures of the left section (4) of the rotating shaft and the middle section (5) of the rotating shaft, and the right gooseneck support (11) is arranged between the middle section (5) of the rotating shaft and the right side of the rotating shaft. between the flange structures of the section (6); through the connection between the left gooseneck support (10) and the left section (4) of the rotating shaft, the middle section (5) of the rotating shaft, and the connection between the right gooseneck support (11) and the rotating shaft The connection between the middle section of the shaft (5) and the right section of the rotary shaft (6), and at the same time realize the rotation of the left section of the rotary shaft (4), the middle section of the rotary shaft (5), and the right section of the rotary shaft (6) as the damper (9). The shaft and the damper (9) are fixedly connected with its rotating shaft, the drive crank (3) and the left section (4) of the rotating shaft are connected by splines, the actuator (1) drives the drive crank (3), and the drive crank (3) ) drives the rotating shaft, the rotating shaft drives the damper (9), and finally realizes the drive of the actuator (1) to the damper (9); The actuator (1) is provided with joint bearings at both supporting points, and the actuator (1) is connected with the actuator support (2) by bolts (12), countersunk washers (13), The matching standard parts composed of flat washer (14), nut (15), split pin 16 and sliding bushing (17) are realized; The actuator support (2) has a double lug structure at the connection point with the actuator (1), a flange bushing A (18) is installed on one ear piece, and a flange bushing is installed on the other ear piece. Sleeve B (19), flange of flanged bushing A (18) is located between the two ears of the actuator mount (2); sliding bushing (17) is mounted on flanged bushing B (19) In the middle, the bolt (12) passes through the countersunk washer (13), the flange bushing A (18), the joint bearing on the actuator (1), the sliding bushing (17), the flat washer (14) and the nut (15) ), the actuator (1) is limited along the direction of the rotation axis of the damper (9) by pressing the joint bearing on the actuator (1) against the end face of the flange bushing A (18); the actuator (1) ) is designed with a cylindrical convex structure (20), a nylon retaining ring (21) is installed on the outside of the flange of the flange bushing A (18); the cylindrical convex structure (20) and the nylon retaining ring (21) are installed There is a design gap between them, so as to prevent the actuator (1) from swinging on the premise that the nylon retaining ring (21) will not limit the actuator (1) in the direction of the rotation axis of the damper (9). (1) The connection of the drive crank (3) is similar to the connection form of the actuator (1) and the actuator support (2), the difference is that there is no cylindrical protrusion structure and nylon retaining ring; the actuator (1) ) The joint bearings at the two support points are self-lubricating bearings, and the two support points of the rotary shaft of the damper (9) are also installed with self-lubricating joint bearings. 2. A damper drive mechanism as claimed in claim 1, characterized in that, a boss structure A (22) is designed on the drive crank (3), and a left rotating shaft support beam (7) is designed with a The boss structure B (23), when the damper (9) is opened to a certain angle, makes the boss structure A (22) and the boss structure B (23) fit together to prevent the damper (9) from being over-opened and damaging other structures. 3. A damper drive mechanism according to claim 1 or 2, characterized in that, a hole is designed on the boss structure B (23) of the drive crank (3), and a bushing is installed in the hole A(24). 4. A damper drive mechanism according to claim 1 or 2, characterized in that, two holes are designed on the said left side rotating shaft support beam (7), and bushings B ( 25), bushing C (26); when the damper (9) is in the closed state, the inner holes of bushing A (24) and bushing B (25) are coaxial, and can pass through bushing A (24), bushing B (25) Insert a positioning pin into the inner hole to prevent the damper (9) from being accidentally opened; when the damper (9) is in the open state, the inner holes of the bushing A (24) and the bushing C (26) are coaxial, and can pass through the bushing A (26). (24) Insert a positioning pin into the inner hole of the bushing C (26) to prevent the damper (9) from being accidentally closed. 5. A damper drive mechanism according to claim 3, characterized in that two holes are designed on the said left side rotating shaft support beam (7), and bushings B (25) are respectively installed in the two holes , bushing C (26); when the damper (9) is in the closed state, the inner holes of bushing A (24) and bushing B (25) are coaxial, and can pass through bushing A (24), bushing B (25) ) insert a positioning pin into the inner hole to prevent the damper (9) from being accidentally opened; when the damper (9) is in the open state, the inner holes of the bushing A (24) and the bushing C (26) are coaxial, and can pass through the bushing A (24). ), insert a positioning pin into the inner hole of the bushing C (26) to prevent the damper (9) from being accidentally closed. 6. A damper drive mechanism according to claim 1, 2 or 5, characterized in that, further comprising a damper position detection device (27), and the damper position detection device (27) is installed at the right end of the right section (6) of the rotating shaft On the right rotary shaft support beam (8) at the head, the damper position probe (28) on the damper position detection device (27) is an external spline structure, which is in line with the internal spline structure at the axis of the right section (6) of the rotary shaft Cooperate. 7. A damper drive mechanism as claimed in claim 3, characterized in that it further comprises a damper position detection device (27), and the damper position detection device (27) is installed on the right side at the right end of the right end of the right section (6) of the rotating shaft On the rotary shaft support beam (8), the damper position probe (28) on the damper position detection device (27) is an external spline structure, which cooperates with the internal spline structure at the axis of the right section (6) of the rotary shaft. 8. A damper drive mechanism as claimed in claim 4, characterized in that, further comprising a damper position detection device (27), and the damper position detection device (27) is installed on the right side at the right end of the right end of the right section (6) of the rotating shaft On the rotary shaft support beam (8), the damper position probe (28) on the damper position detection device (27) is an external spline structure, which cooperates with the internal spline structure at the axis of the right section (6) of the rotary shaft.

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