CN112461525B - Unmanned helicopter engine mounting bracket test device - Google Patents
Unmanned helicopter engine mounting bracket test device Download PDFInfo
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- CN112461525B CN112461525B CN202011307740.1A CN202011307740A CN112461525B CN 112461525 B CN112461525 B CN 112461525B CN 202011307740 A CN202011307740 A CN 202011307740A CN 112461525 B CN112461525 B CN 112461525B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/60—Testing or inspecting aircraft components or systems
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- Testing Of Engines (AREA)
Abstract
The invention belongs to the fatigue test technology of an unmanned helicopter engine mounting bracket, and discloses a test device of the unmanned helicopter engine mounting bracket, which comprises: the device comprises a mounting plate, a support mounting seat, an engine mounting support, a switching support plate, a torsion adding support rod, torsion adding double arms, a first loading joint, a second loading joint, a loading mounting seat, a vertical loading joint, a course loading joint, a lateral loading screw, a torsion-proof shaft, a cross, a torsion-proof shaft fixing joint and a torsion-proof support, wherein the engine mounting support is a test piece, and is required to apply vertical load, course load and lateral load to the engine mounting support in a whole machine coordinate system and apply torque to the engine mounting support in a local coordinate system.
Description
Technical Field
The invention belongs to the fatigue test technology of an unmanned helicopter engine mounting bracket, and relates to a test device of the unmanned helicopter engine mounting bracket.
Background
As a core component of the helicopter, the engine provides power for the helicopter. The engine mounting bracket is used as a connecting fulcrum for mounting the engine on the helicopter, the fatigue life of the engine mounting bracket directly influences the fixation of the engine on the helicopter, the vibration level of the helicopter is improved by light people, and the flight accident is caused by heavy people.
The mounting bracket of the engine of the unmanned helicopter is small in structure and can bear overload and reactive torque from the engine, wherein the overload load corresponding coordinate system is a full-machine coordinate system, the torque corresponding coordinate system is a local coordinate system of the engine, and the integral fatigue life of the engine is obtained in an integral loading mode. The existing engine mounting bracket of the helicopter is large in structure and generally comprises a plurality of support rods, connecting rods and supports, the scheme of carrying out fatigue test on the support rods, the connecting rods and the supports is to load the support rods, the connecting rods and the supports separately to obtain the fatigue life of the support rods, the loading mode is simple, and the support is generally in a two-force rod mode. Due to the unique loading and fatigue test requirements of the engine mounting bracket of the unmanned helicopter, the invention provides the engine mounting bracket test device of the unmanned helicopter, which simulates the real loading state of the engine mounting bracket on the helicopter, and realizes the application of overload load and engine counter torque transmitted by an engine on the engine mounting bracket so as to check the fatigue life of the engine mounting bracket.
The device provided by the invention has the advantages of coordinated structure, stable loading and high reliability of test data.
At present, china has no similar test device and can not carry out the loading. No foreign published literature was retrieved.
Disclosure of Invention
In view of the above situation in the prior art, the invention provides a test device for an engine mounting bracket of an unmanned helicopter, which is used for a fatigue test of the engine mounting bracket.
The technical scheme of the invention is as follows:
an unmanned helicopter engine mount bracket test device, includes: the device comprises a mounting plate, a support mounting seat, an engine mounting support, a switching support plate, a twisting unit, a loading mounting seat, a vertical loading joint, a course loading joint and a lateral loading screw rod;
the mounting plate is mounted on the ground rail through foundation bolts;
the lower end of the bracket mounting seat is connected with the mounting plate through a bolt, and the upper end of the bracket mounting seat is connected with the lower end of the engine bracket;
the switching support plate is an L-shaped aluminum plate and comprises a vertical plate and a transverse plate positioned above the vertical plate; the lower end of the vertical plate of the switching support plate is connected with the upper end of the engine support;
the torque adding unit is perpendicular to the vertical plate of the switching support plate and is used for applying torque to the switching support plate so as to drive the engine mounting bracket to rotate in a vertical plane;
the loading mounting seat is fixed on a transverse plate of the switching supporting plate; the vertical loading joint, the course loading joint and the lateral loading screw are all arranged on the loading mounting seat;
the vertical loading joint is connected with a vertical actuating mechanism and is used for applying a vertical load to the engine mounting bracket through the switching support plate; the course loading joint is connected with the course actuating mechanism and is used for applying course load to the engine mounting bracket through the switching support plate; the side loading screw is connected with a side actuating mechanism and used for applying side load to the engine mounting bracket through the switching support plate.
Further, the torque adding unit includes: the torsion adding support rod, the torsion adding double arms, the first loading joint and the second loading joint;
the torque-adding supporting rod is perpendicular to the vertical plate of the switching supporting plate, is a T-shaped round shaft rod and comprises a large shaft end and a small shaft end; the large shaft end is connected with a vertical plate of the switching support plate through a bolt; the end part of the small shaft end is symmetrically chamfered along the course, and a through hole is vertically arranged at the center of the chamfered section;
the torsion-adding double arms are of a symmetrical structure, and the middle parts of the torsion-adding double arms are connected with a small shaft end through hole of the torsion-adding support rod through a bolt;
the two ends of the torque-adding double arm are provided with double-fork ear structures which are grooved along the vertical direction, and the double-fork ear structures at the two ends are respectively connected with the first loading joint and the second loading joint; the first loading joint and the second loading joint are used for applying loads with equal magnitude and opposite directions to the torsion double arm.
Furthermore, the device also comprises an anti-twisting unit which is arranged on the other side opposite to the direction of the twisting unit in a way of being vertical to the switching support plate; the anti-twist unit is used for simulating a coupler at the output end of the engine.
Further, the torsion prevention unit includes: the anti-torsion device comprises an anti-torsion shaft, a cross, an anti-torsion shaft fixing joint and an anti-torsion support;
the anti-twisting support is fixed on the ground rail through a bolt; the anti-twisting support is provided with an installation plate vertical to the ground; the torsion-proof shaft fixing joint is arranged perpendicular to the mounting plate;
one end of the anti-torsion shaft is connected with the switching support plate, and the other end of the anti-torsion shaft is connected with the anti-torsion shaft fixed joint through a cross; the cross is used for forming hinged connection between the anti-torsion shaft and the anti-torsion shaft fixed joint.
Furthermore, the torsion-proof shaft and the torsion-adding support rod are concentrically arranged.
Furthermore, the loading mounting seat is of a first double-fork ear structure and is positioned on the outermost layer;
the course loading joint is a second double-fork lug structure and is positioned in the first double-fork lug structure of the loading mounting seat;
the vertical loading joint is a joint bearing with a handle; the second double-fork ear structure is positioned in the course loading joint;
the loading mounting seat, the course loading joint and the vertical loading joint are provided with concentric through holes; and the lateral loading screw rod connects and fixes the loading mounting seat, the course loading joint and the vertical loading joint through the concentric through hole.
Further, the center of the loading installation seat and the center of gravity of the engine are overlapped in the vertical direction.
Furthermore, the bracket mounting seat is of an I-shaped structure, and the upper end surface of the bracket mounting seat simulates a plane of a machine body connected with the engine mounting bracket; reinforcing ribs are arranged in the I-shaped structure.
The invention has the technical effects that: the invention can truly simulate the real loading state of the engine mounting bracket on the machine, and realize the application of the overload load and the engine counter torque transmitted by the engine to the engine mounting bracket so as to check the fatigue life of the engine mounting bracket.
The device provided by the invention has the advantages of coordinated structure, stable loading and high reliability of test data.
Drawings
FIG. 1 is a schematic view of a structural device of the present invention;
in the figure, 1-mounting plate, 2-support mounting seat, 3-engine mounting support, 4-switching support plate, 5-torsion adding support rod, 6-torsion adding double arm, 7-1 first loading joint, 7-2 second loading joint, 8-loading mounting seat, 9-vertical loading joint, 10-course loading joint, 11-lateral loading screw rod, 12-torsion-proof shaft, 13-cross, 14-torsion-proof shaft fixing joint and 15-torsion-proof support.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the invention provides a test device for an engine mounting bracket of an unmanned helicopter, which is used for a fatigue test of the engine mounting bracket and comprises: the device comprises a mounting plate 1, a support mounting seat 2, an engine mounting support 3, a switching support plate 4, a torsion adding support rod 5, a torsion adding double arm 6, a first loading joint 7-1, a second loading joint 7-2, a loading mounting seat 8, a vertical loading joint 9, a course loading joint 10, a lateral loading screw 11, a torsion preventing shaft 12, a cross 13, a torsion preventing shaft fixing joint 14 and a torsion preventing support 15, wherein the engine mounting support 3 is a test piece, and is required to apply vertical load, course load and lateral load to the engine mounting support 3 in a full-machine coordinate system and apply torque to the engine mounting support 3 in a local coordinate system.
In the unmanned helicopter engine mounting bracket testing device, a mounting plate 1 is connected with a ground rail of a test plant through foundation bolts, a simulation machine body of an upper end plane of a bracket mounting seat 2 is connected with an engine mounting bracket 3, and a lower end plane is fixedly connected with the mounting plate 1 through bolts; the lower end of the switching support plate 4 in the vertical direction simulates an engine and is connected with an engine mounting bracket 3, the upper end in the vertical direction is connected with a loading mounting seat 8, and the heading is connected with a torque-adding support rod 5 and a torque-proof shaft 12; the other end of the torque adding support rod 5 is connected with the center of the torque adding double arm 6 through a bolt, the first loading joint 7-1 and the second loading joint 7-2 are connected with the two ends of the torque adding double arm 6, and a torque load is applied to the first loading joint 7-1 and the second loading joint 7-2 through an executing mechanism to realize the torque adding function of the device in a local coordinate system; the loading mounting seat 8 is connected with the vertical loading joint 9 and the course loading joint 10 through the lateral loading screw rod 11, the lateral executing mechanism is connected with the lateral loading screw rod 11 to apply lateral load, the vertical executing mechanism is connected with the vertical loading joint 9 to apply vertical load, the course executing mechanism is connected with the course loading joint 10 to apply course load, and overload loading of the device in a full-machine coordinate system is achieved.
Unmanned helicopter engine mount support test device, its characterized in that: the support mounting seat 2 is of an I-shaped structure, the upper end plane simulates a machine body part connected with the engine mounting support 3, the lower end plane is thickened, and reinforcing ribs are arranged in I-shaped grooves.
Unmanned helicopter engine mount support test device, its characterized in that: the transfer support plate 4 is a 7-shaped aluminum plate and is divided into a vertical plate and a transverse plate, the lower end of the vertical plate simulates the connection between an engine and the engine mounting bracket 3, 8 through holes uniformly distributed on the circumference are formed in the vertical plate along a first center, and the first center is a loading point of local coordinate system torque; 8 through holes are uniformly distributed on the transverse plate along a second center, and the second center is a loading point of overload load of the whole machine coordinate system.
Unmanned helicopter engine mount support test device, its characterized in that: the torque-adding support rod 5 is a T-shaped round shaft rod and is divided into a large shaft end and a small shaft end, the large shaft end is provided with 8 through holes uniformly distributed on the circumference around the central line of a shaft, and the torque-adding support rod is matched with the 8 through holes uniformly distributed on the circumference and arranged in the second center; the end part of the small shaft is symmetrically chamfered along the course, and a through hole is vertically arranged at the center of the chamfered section and used for installing the torque-adding double arm 6.
Unmanned helicopter engine mount support test device, its characterized in that: the torque-adding double arms 6 are of a symmetrical structure, double fork lugs are symmetrically arranged at two ends of each torque-adding double arm, grooves are formed in the vertical direction, and the torque-adding double arms are respectively connected with a first loading joint 7-1 and a second loading joint 7-2 through bolts; the inner ring of the central section of the torque-adding double arm 6 is provided with a through groove along the course, and the outer ring is provided with symmetrical chamfered edges along the course and is used for connecting the torque-adding supporting rod 5.
Unmanned helicopter engine mount support test device, its characterized in that: during testing, the first loading joint 7-1 and the second loading joint 7-2 are respectively connected with an actuating mechanism, and the actuating mechanism applies loads with equal magnitude and opposite directions to the first loading joint 7-1 and the second loading joint 7-2.
Unmanned helicopter engine mount support test device, its characterized in that: the loading mounting seat 8 is of a double-fork ear structure and is arranged on the outermost layer; the course loading joint 10 is of a double-fork ear structure and is arranged in the middle layer; the vertical loading joint 9 is a joint bearing structure with a handle and is arranged at the innermost layer; a loading installation seat 8,
The loading joint 10 and the vertical loading joint 9 are provided with concentric through holes, and the lateral loading screw 11 connects and fixes the loading joint 10 and the vertical loading joint through the concentric through holes.
Unmanned helicopter engine mount support test device, its characterized in that: the torsion-proof shaft 12 simulates a power output shaft sleeve and is connected with a torsion-proof shaft fixed joint 14 through a cross 13 in a cross shape, so that the function of simulating a coupling at an output end is realized.
Claims (7)
1. The utility model provides an unmanned helicopter engine mount support test device which characterized in that: the device comprises: the device comprises a mounting plate, a support mounting seat, an engine mounting support, a switching support plate, a twisting unit, a loading mounting seat, a vertical loading joint, a course loading joint and a lateral loading screw rod;
the mounting plate is mounted on the ground rail through foundation bolts;
the lower end of the bracket mounting seat is connected with the mounting plate through a bolt, and the upper end of the bracket mounting seat is connected with the lower end of the engine bracket;
the switching support plate is an L-shaped aluminum plate and comprises a vertical plate and a transverse plate positioned above the vertical plate; the lower end of the vertical plate of the switching support plate is connected with the upper end of the engine support;
the torque adding unit is perpendicular to the vertical plate of the switching support plate and is used for applying torque to the switching support plate so as to drive the engine mounting bracket to rotate in a vertical plane; the torque adding unit includes: the torsion adding support rod, the torsion adding double arms, the first loading joint and the second loading joint; the torque-adding supporting rod is perpendicular to the vertical plate of the switching supporting plate, is a T-shaped round shaft rod and comprises a large shaft end and a small shaft end; the large shaft end is connected with a vertical plate of the switching support plate through a bolt; the end part of the small shaft end is symmetrically chamfered along the course, and a through hole is vertically arranged at the center of the chamfered section; the torsion-adding double arms are of a symmetrical structure, and the middle parts of the torsion-adding double arms are connected with the through holes of the small shaft ends of the torsion-adding support rods through bolts; two ends of the torque-adding double arm are of double-fork-lug structures which are grooved along the vertical direction and are respectively connected with the first loading joint and the second loading joint through the double-fork-lug structures at the two ends; the first loading joint and the second loading joint are used for applying loads with equal magnitude and opposite directions to the torsion double arms;
the loading mounting seat is fixed on a transverse plate of the switching supporting plate; the vertical loading joint, the course loading joint and the lateral loading screw are all arranged on the loading mounting seat;
the vertical loading joint is connected with a vertical actuating mechanism and is used for applying a vertical load to the engine mounting bracket through the switching support plate; the course loading joint is connected with the course executing mechanism and is used for applying course load to the engine mounting bracket through the switching support plate; the side loading screw is connected with a side actuating mechanism and used for applying side load to the engine mounting bracket through the switching support plate.
2. The unmanned helicopter engine mounting bracket test apparatus of claim 1, wherein: the device also comprises an anti-twisting unit which is arranged on the other side opposite to the direction of the twisting unit in a way of being vertical to the switching support plate; the anti-twist unit is used for simulating a coupler at the output end of the engine.
3. The unmanned helicopter engine mounting bracket test apparatus of claim 2, wherein: the torsion prevention unit includes: the anti-torsion device comprises an anti-torsion shaft, a cross, an anti-torsion shaft fixed joint and an anti-torsion support;
the anti-twisting support is fixed on the ground rail through a bolt; the anti-twisting support is provided with an installation plate vertical to the ground; the torsion-proof shaft fixing joint is arranged perpendicular to the mounting plate;
one end of the anti-torsion shaft is connected with the switching support plate, and the other end of the anti-torsion shaft is connected with the anti-torsion shaft fixed joint through a cross; the cross is used for forming hinged connection between the anti-torsion shaft and the anti-torsion shaft fixed joint.
4. The unmanned helicopter engine mounting bracket test apparatus of claim 3, wherein: the torsion-proof shaft and the torsion-adding support rod are arranged concentrically.
5. The unmanned helicopter engine mounting bracket test apparatus of claim 1, wherein: the loading mounting seat is of a first double-fork ear structure and is positioned on the outermost layer;
the course loading joint is a second double-fork ear structure and is positioned in the first double-fork ear structure of the loading mounting seat;
the vertical loading joint is a joint bearing with a handle; the second double-fork ear structure is positioned in the course loading joint;
the loading mounting seat, the course loading joint and the vertical loading joint are provided with concentric through holes; and the lateral loading screw rod connects and fixes the loading mounting seat, the course loading joint and the vertical loading joint through the concentric through hole.
6. The unmanned helicopter engine mounting bracket test apparatus of claim 1, wherein: the center of the loading mounting seat is overlapped with the center of gravity of the engine in the vertical direction.
7. The unmanned helicopter engine mounting bracket test apparatus of claim 1, wherein: the support mounting seat is of an I-shaped structure, and the upper end surface of the support mounting seat simulates a plane of a machine body connected with the engine mounting support; reinforcing ribs are arranged in the I-shaped structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011307740.1A CN112461525B (en) | 2020-11-20 | 2020-11-20 | Unmanned helicopter engine mounting bracket test device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011307740.1A CN112461525B (en) | 2020-11-20 | 2020-11-20 | Unmanned helicopter engine mounting bracket test device |
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| CN112461525B true CN112461525B (en) | 2022-11-04 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113335560B (en) * | 2021-06-04 | 2024-01-30 | 中国飞机强度研究所 | Complex load box section or barrel section test device and method |
| CN114056598B (en) * | 2021-11-19 | 2023-04-28 | 中国直升机设计研究所 | Helicopter fuselage upper platform test device |
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