CN112179787B - Torsion test device for main paddle central part and support arm limited lock - Google Patents
Torsion test device for main paddle central part and support arm limited lock Download PDFInfo
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- CN112179787B CN112179787B CN202011021218.7A CN202011021218A CN112179787B CN 112179787 B CN112179787 B CN 112179787B CN 202011021218 A CN202011021218 A CN 202011021218A CN 112179787 B CN112179787 B CN 112179787B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/22—Investigating strength properties of solid materials by application of mechanical stress by applying steady torsional forces
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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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- 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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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Abstract
The invention belongs to the technical field of fatigue tests of main-rotor central parts of helicopters, and discloses a torsion test device for a main-rotor central part and a support arm limit lock. The device provided by the invention has the advantages of coordinated structure, stable loading and high reliability of test data.
Description
Technical Field
The invention belongs to the technical field of fatigue tests of main-rotor central parts of helicopters, and particularly relates to a torsion test device for a main-rotor central part and a support arm limit lock.
Background
The requirement of an electric folding system is added in a main-rotor central part of a certain novel helicopter, the available design space of a propeller hub is limited, a connecting vertical plate of a support arm limiting lock is arranged on the central part, and the support arm limiting lock is fixedly connected with the central part vertical plate through a bolt. The central part and the support arm limiting lock can lock and unlock the shimmy motion of the waving support arm component in the rotor folding operation process, and in the process, the central part and the support arm limiting lock bear the torque transmitted by the waving support arm component. The prior central part fatigue test design does not relate to the folding operation of a rotor wing, and the fatigue test scheme of the central part only loads the centrifugal force, the shimmy force and the waving force on the central part body. Because of the unique load working condition of the central part and the support arm limit lock rotor wing during folding operation, the invention provides a central part and support arm limit lock torsion test device, which simulates the stress state of the central part and the support arm limit lock during folding operation of the rotor wing, and applies torque to the central part and the support arm limit lock so as to check the fatigue life of the folding of the central part and the support arm limit lock rotor wing. 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
Aiming at the problems, the invention provides a torsion test device for a main paddle central part and a support arm limit lock, which truly simulates the stress state of the central part and the support arm limit lock during the folding operation of a rotor wing, realizes the application of torque to the central part and the support arm limit lock and examines the fatigue life of the folding of the rotor wing of the central part and the support arm limit lock. The device provided by the invention has the advantages of coordinated structure, stable loading and high reliability of test data.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme.
A main oar central part and support arm limit lock add turn round test device for the central part fatigue test includes: the device comprises a ground rail bottom plate 1, a mounting plate 2, an anchor bolt assembly 3, a rotor wing simulation shaft 4, a central part and support arm limiting lock assembly 5, a nut assembly 6, a loading fork lug 7, a vertical plate 8, a bearing seat 9, a torque-adding support arm 10 and a loading joint 11;
the central part and the support arm limiting lock assembly 5 are test pieces, the mounting plate 2 is sequentially connected and fixed on the ground rail bottom plate 1 through the foundation bolt assembly 3 from bottom to top along the axial direction of the central part and the support arm limiting lock assembly 5, the rotor wing simulation shaft 4 is connected and fixed on the mounting plate 2 through a bolt, and the central part and the support arm limiting lock assembly 5 are installed on the rotor wing simulation shaft 4 through spline fit and are fixed through the nut assembly 6; along the radial of central part and support arm stopper lock subassembly 5, from left to right in proper order with loading fork ear 7 through bolted connection on central part and support arm stopper lock subassembly 5, the rod end installation bearing frame 9 of loading fork ear 7 and add the turn round support arm 10, installation bearing frame 9 passes through the bolt fastening on riser 8, add the turn round support arm 10 and pass through bolted connection load joint 11, give load joint 11 loading through actuating mechanism and realize the experimental function of adding the turn round of whole device.
The technical scheme of the invention has the characteristics and further improvements that:
(1) a T-shaped groove is formed in the ground rail base plate 1 at a distance of 0.5 meter from the support arm limiting lock assembly 5 in the radial direction along the central part and is used for installing T-shaped nuts of the foundation bolt assemblies 3, the width of a T-shaped groove width area on the ground rail base plate 1 is not smaller than that of a T-shaped nut width area of the foundation bolt assemblies 3, and the height of a T-shaped groove bottom width area on the ground rail base plate 1 is not lower than that of the T-shaped nut width area of the foundation bolt assemblies 3.
(2) The mounting plate 2 is a 7-shaped thick steel plate, the left end of the mounting plate is a wide area, the right end of the mounting plate is a narrow area, and 8 threaded through holes are uniformly distributed on one circumference of the center of the wide area and used for mounting the rotor wing simulation shaft 4; 2 threaded through holes are respectively formed in the left side of the narrow area and the right side of the wide area and used for installing a vertical plate 8; 2 wide district left sides in mounting panel set up 3 unthreaded holes, and the narrow district right side sets up 2 unthreaded holes, and the radial distance at left side and right side unthreaded hole center is 0.5 meters for installation rag bolt subassembly 3.
(3) A large disc is arranged at the bottom of the rotor wing simulation shaft 4, 8 through holes are uniformly distributed on the large disc, and the rotor wing simulation shaft 4 is connected with the mounting plate 2 through the through holes by bolts; the upper end of the rotor wing simulation shaft 4 is provided with a spline, the size and tolerance requirements of the spline strictly follow the size of an installation interface, and the spline is provided with a tooth-lacking anti-error design for positioning the installation of the central part and the support arm limiting lock assembly 5; the topmost end is provided with a thread which cooperates with the nut component 6.
(4) The nut assembly 6 comprises a nut and a compression bolt 10, and the nut is screwed into the rotor wing simulation shaft 4 and then compresses the central part and the upper end of the support arm stop lock assembly 5; 10 evenly distributed threaded through holes are formed in the nut, and 10 compression bolts are screwed into the threaded through holes and then abut against the upper end of the central part and the upper end of the support arm limiting lock assembly 5 to prevent the nut from loosening.
(5) The left end of the loading fork lug 7 is a double fork lug, and an inner groove of the double fork lug is in transition fit with the central part and the support arm limiting lock assembly 5; a right-end polish rod, the middle section of which is a round rod, is penetrated into a hole of a rod end mounting bearing block 9 in a transition fit manner; the right end of the polish rod is provided with grooves along two sides of the plane direction of the double-fork lug on the round rod, and the groove section is provided with two through holes for installing the torque-adding support arm 10.
(6) A first through hole is formed in one end of the rod end mounting bearing block 9 in the axial direction of a polish rod at the right end of the loading fork lug 7, and a needle bearing is mounted in the through hole; the other end is provided with two second through holes which are symmetrical to the center of the first through hole along the horizontal direction, and the rod end mounting bearing seat 9 is fixed on the vertical plate 8 through the second through holes by bolts.
(7) One end of the torque-adding support arm 10 is provided with a first double-fork lug vertical to the horizontal plane, and the first double-fork lug is provided with two symmetrical through holes; the other end is provided with a second double-fork ear parallel to the horizontal plane, and a through hole is arranged in the center of the second double-fork ear.
(8) One end of the loading joint 11 is provided with a joint bearing, and a bearing hole is connected with a second double-fork lug of the torque-adding support arm 10 through a bolt; the other end is a round bar-shaped rod end, and a threaded hole is arranged in the center of the rod end and used for connecting with an actuating mechanism.
The invention provides a torsion test device for a main paddle central part and a support arm limiting lock, which can truly simulate the stress state of the central part and the support arm limiting lock during the folding operation of a rotor wing, realize the application of torque to the central part and the support arm limiting lock and check the fatigue life of the folding rotor wing of the central part and the support arm limiting lock. 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 structural diagram of a main paddle center piece and support arm limited lock torsion test apparatus according to an embodiment of the present invention.
Detailed Description
The technical solution of the present invention is explained in detail below.
As shown in figure 1, the invention provides a torsion test device for a main paddle central part and support arm limited lock, which is used for a fatigue test of the central part. The device comprises a ground rail bottom plate (1), a mounting plate (2), a foundation bolt assembly (3), a rotor wing simulation shaft (4), a central part and support arm limiting lock assembly (5), a nut assembly (6), a loading fork lug (7), a vertical plate (8), a bearing seat (9), a torque-adding support arm (10) and a loading joint (11), wherein the central part and the support arm limiting lock assembly (5) are test pieces.
Main oar central part and support arm limit lock add and turn round test device, its characterized in that: the mounting plate (2) is sequentially connected and fixed on the ground rail bottom plate (1) through the foundation bolt assembly (3) from bottom to top along the axial direction of the central piece and the support arm limiting lock assembly (5), the rotor wing simulation shaft (4) is connected and fixed on the mounting plate (2) through a bolt, and the central piece and the support arm limiting lock assembly (5) are installed on the rotor wing simulation shaft (4) through spline fit and are fixed through the nut assembly (6); along the radial of central part and support arm retained lock subassembly (5), from left to right in proper order with loading fork ear (7) through bolted connection on central part and support arm retained lock subassembly (5), rod end installation bearing frame (9) and the support arm (10) of twisting of loading fork ear (7), installation bearing frame (9) are through the bolt fastening on riser (8), it connects load joint (11) through bolted connection to add the support arm (10) of twisting, through actuating mechanism for load joint (11) loading and realize the experimental function of twisting that adds of whole device.
Main oar central part and support arm limit lock add and turn round test device, its characterized in that: a T-shaped groove is formed in the ground rail base plate (1) at intervals of 0.5 meter along the radial direction of the central part and the support arm limiting lock assembly (5) and used for installing a T-shaped nut of the foundation bolt assembly (3), the width of a T-shaped groove width area on the ground rail base plate (1) is not smaller than that of a T-shaped nut width area of the foundation bolt assembly (3), and the height of the T-shaped groove bottom width area on the ground rail base plate (1) is not lower than that of the T-shaped nut width area of the foundation bolt assembly (3).
Main oar central part and support arm limit lock add and turn round test device, its characterized in that: the mounting plate (2) is a 7-shaped thick steel plate, the left end of the mounting plate is a wide area, the right end of the mounting plate is a narrow area, and 8 threaded through holes are uniformly distributed on the circumference of the center of the wide area along the center of the mounting plate and used for mounting a rotor wing simulation shaft (4); 2 threaded through holes are respectively formed in the left side of the narrow area and the right side of the wide area and used for installing a vertical plate (8); mounting panel (2) wide region left side sets up 3 unthreaded holes, and the narrow region right side sets up 2 unthreaded holes, and the radial distance at left side and right side unthreaded hole center is 0.5 meters for installation rag bolt subassembly (3).
Main oar central part and support arm limit lock add and turn round test device, its characterized in that: a large disc is arranged at the bottom of the rotor wing simulation shaft (4), 8 through holes are uniformly distributed on the large disc, and the rotor wing simulation shaft (4) is connected with the mounting plate (2) through the through holes by bolts; the upper end of the rotor wing simulation shaft (4) is provided with a spline, the size and tolerance requirements of the spline strictly follow the size of an installation interface, and the spline is provided with a missing tooth for positioning the installation of the central part and the support arm stop lock assembly (5); the topmost end is provided with a thread which is matched with the nut component (6).
Main oar central part and support arm limit lock add and turn round test device, its characterized in that: the nut assembly (6) comprises a nut and a compression bolt 10, and the nut is screwed into the rotor wing simulation shaft (4) and then compresses the central part and the upper end of the support arm limiting lock assembly (5); 10 evenly distributed thread through holes are formed in the nut, and 10 compression bolts are screwed into the thread through holes and then prop against the upper ends of the central part and the support arm limiting lock assembly (5) to prevent the nut from loosening.
Main oar central part and support arm limit lock add and turn round test device, its characterized in that: the left end of the loading fork lug (7) is a double fork lug, and an inner groove of the double fork lug is in transition fit with the central part and the support arm limiting lock assembly (5); a polish rod at the right end, wherein the middle section of the polish rod is a round rod and penetrates into a hole of a rod end mounting bearing seat (9) in a transition fit manner; the right end of the polish rod is provided with a groove on the round rod along two sides of the plane direction of the double-fork lug, and the groove section is provided with two through holes for installing the torque-adding support arm (10).
Main oar central part and support arm limit lock add and turn round test device, its characterized in that: one end of a rod end mounting bearing seat (9) is provided with a first through hole along the axial direction of a polish rod at the right end of the loading fork lug (7), and a needle bearing is mounted in the through hole; the other end is provided with two second through holes symmetrical to the center of the first through hole along the horizontal direction, and the rod end mounting bearing seat (9) is fixed on the vertical plate (8) through the second through holes by bolts.
Main oar central part and support arm limit lock add and turn round test device, its characterized in that: one end of the torque-adding support arm (10) is provided with a first double-fork lug vertical to the horizontal plane, and the first double-fork lug is provided with two symmetrical through holes; the other end is provided with a second double-fork ear parallel to the horizontal plane, and a through hole is arranged in the center of the second double-fork ear.
Main oar central part and support arm limit lock add and turn round test device, its characterized in that: one end of the loading joint (11) is provided with a joint bearing, and a bearing hole is connected with a second double-fork lug of the torque-adding support arm (10) through a bolt; the other end is a rod end of a round rod shape, and a threaded hole is arranged in the center of the rod end and used for being connected with an actuating mechanism.
The invention provides a torsion test device for a main paddle central part and a support arm limiting lock, which truly simulates the stress state of the central part and the support arm limiting lock during the folding operation of a rotor wing, realizes the application of torque to the central part and the support arm limiting lock and examines the fatigue life of the folding of the rotor wing of the central part and the support arm limiting lock. The device provided by the invention has the advantages of coordinated structure, stable loading and high reliability of test data.
Claims (8)
1. The utility model provides a main oar central part and support arm limit lock add turn round test device for central part fatigue test, its characterized in that includes: the device comprises a ground rail bottom plate (1), a mounting plate (2), a foundation bolt assembly (3), a rotor wing simulation shaft (4), a central part and support arm limiting lock assembly (5), a nut assembly (6), a loading fork lug (7), a vertical plate (8), a bearing seat (9), a torque-adding support arm (10) and a loading joint (11);
the central part and the support arm limiting lock assembly (5) are test pieces, the mounting plate (2) is sequentially connected and fixed on the ground rail bottom plate (1) through the foundation bolt assembly (3) from bottom to top along the axial direction of the central part and the support arm limiting lock assembly (5), the rotor wing simulation shaft (4) is connected and fixed on the mounting plate (2) through a bolt, and the central part and the support arm limiting lock assembly (5) are installed on the rotor wing simulation shaft (4) through spline fit and are fixed through the nut assembly (6); the loading fork lugs (7) are sequentially connected to the central part and the support arm limiting lock assembly (5) through bolts from left to right along the radial direction of the central part and the support arm limiting lock assembly (5), the rod ends of the loading fork lugs (7) are provided with bearing seats (9) and twisting support arms (10), the bearing seats (9) are fixed on a vertical plate (8) through bolts, the twisting support arms (10) are connected with a loading joint (11) through bolts, and an execution mechanism loads the loading joint (11) to realize the twisting test function of the whole device;
the left end of the loading fork lug (7) is a double fork lug, and an inner groove of the double fork lug is in transition fit with the central part and the support arm limiting lock assembly (5); a right-end polish rod, the middle section of which is a round rod, is penetrated into the hole of the bearing block (9) in a transition fit manner; the right end of the polish rod is provided with a groove on the round rod along two sides of the plane direction of the double-fork lug, and the groove section is provided with two through holes for installing the torque-adding support arm (10).
2. The main-paddle central part and support arm limit lock torque-up test device according to claim 1, wherein a T-shaped groove is formed in the ground rail base plate (1) at intervals of 0.5 meter along the radial direction of the central part and support arm limit lock assembly (5) and used for installing a T-shaped nut of the foundation bolt assembly (3), the width of a T-shaped groove wide area in the ground rail base plate (1) is not smaller than the width of a T-shaped nut wide area of the foundation bolt assembly (3), and the height of a T-shaped groove bottom wide area in the ground rail base plate (1) is not lower than the height of a T-shaped nut wide area in the foundation bolt assembly (3).
3. The main paddle central part and support arm limited lock torque test device according to claim 1, wherein the mounting plate (2) is a 7-shaped thick steel plate, the left end is a wide area, and the right end is a narrow area, wherein 8 threaded through holes are uniformly distributed on the wide area along a circumference of the center for mounting the rotor simulation shaft (4); 2 threaded through holes are respectively formed in the left side of the narrow area and the right side of the wide area and used for installing a vertical plate (8); the left side of the wide area of the mounting plate (2) is provided with 3 unthreaded holes, the right side of the narrow area is provided with 2 unthreaded holes, and the radial distance between the centers of the left side unthreaded holes and the right side unthreaded holes is 0.5 m for mounting the foundation bolt assembly (3).
4. The main-rotor central part and support arm limited locking torsion test device is characterized in that a large disc is arranged at the bottom of a rotor simulation shaft (4), 8 through holes are uniformly distributed in the large disc, and the rotor simulation shaft (4) is connected with a mounting plate (2) through the through holes by bolts; the upper end of the rotor wing simulation shaft (4) is provided with a spline, the size and tolerance requirements of the spline strictly follow the size of an installation interface, and the spline is provided with a missing tooth for positioning the installation of the central part and the support arm stop lock assembly (5); the topmost end is provided with a thread which is matched with the nut component (6).
5. The main paddle center piece and support arm limited lock torque test device according to claim 1, wherein the nut assembly (6) comprises a nut and 10 compression bolts, and the nut is screwed into the rotor simulation shaft (4) to compress the center piece and the upper end of the support arm limited lock assembly (5); 10 evenly distributed threaded through holes are formed in the nut, and 10 compression bolts are screwed into the threaded through holes and then abut against the upper end of the central part and the upper end of the support arm limiting lock assembly (5) to prevent the nut from loosening.
6. The main paddle center piece and support arm limited lock torque test device as claimed in claim 1, wherein one end of the bearing seat (9) is provided with a first through hole along the axial direction of a polish rod at the right end of the loading fork ear (7), and a needle bearing is installed in the through hole; the other end is provided with two second through holes symmetrical to the center of the first through hole along the horizontal direction, and a bearing seat (9) installed at the rod end is fixed on a vertical plate (8) through the second through holes by bolts.
7. The main paddle central part and support arm limited lock torque test device as claimed in claim 1, wherein one end of the torque support arm (10) is provided with a first double-fork ear vertical to the horizontal plane, and two symmetrical through holes are arranged on the first double-fork ear; the other end is provided with a second double-fork ear parallel to the horizontal plane, and a through hole is arranged in the center of the second double-fork ear.
8. The main paddle center piece and support arm limited lock torque test device as claimed in claim 7, wherein a joint bearing is installed at one end of the loading joint (11), and a bearing hole is connected with the second double-fork lug of the torque support arm (10) through a bolt; the other end is a rod end of a round rod shape, and a threaded hole is arranged in the center of the rod end and used for being connected with an actuating mechanism.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011021218.7A CN112179787B (en) | 2020-09-25 | 2020-09-25 | Torsion test device for main paddle central part and support arm limited lock |
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| CN202011021218.7A CN112179787B (en) | 2020-09-25 | 2020-09-25 | Torsion test device for main paddle central part and support arm limited lock |
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| CN112179787B true CN112179787B (en) | 2022-09-30 |
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| CN201974279U (en) * | 2010-12-31 | 2011-09-14 | 中国直升机设计研究所 | Excitation head limiting device for fatigue test of helicopter blades |
| CN103900801A (en) * | 2012-12-25 | 2014-07-02 | 中国直升机设计研究所 | Y-piece fatigue test device |
| CN105841948A (en) * | 2016-05-16 | 2016-08-10 | 宁波星箭航天机械有限公司 | Helicopter rotor hub bridle test board and test method therefor |
| CN110979658A (en) * | 2019-12-11 | 2020-04-10 | 北京中航智科技有限公司 | Folding rotor wing of coaxial unmanned helicopter |
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| CN112179787A (en) | 2021-01-05 |
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