CN109506911B

CN109506911B - Loading test device

Info

Publication number: CN109506911B
Application number: CN201811334300.8A
Authority: CN
Inventors: 邓文; 包名; 吴宣
Original assignee: China Helicopter Research and Development Institute
Current assignee: China Helicopter Research and Development Institute
Priority date: 2018-11-09
Filing date: 2018-11-09
Publication date: 2020-10-23
Anticipated expiration: 2038-11-09
Also published as: CN109506911A

Abstract

The application provides a loading test device, including fixed subassembly and the loading subassembly of being connected with fixed subassembly, fixed subassembly and loading subassembly are used for with the first fixed test piece of angle of predetermineeing, and when the loading subassembly provided the loading force for the test piece for be the distance of predetermineeing between the center of test piece and the axis of loading subassembly.

Description

Loading test device

Technical Field

The application relates to the technical field of aviation, and particularly provides a loading test device.

Background

In the flight of a helicopter, a rotor hub support arm is an important stressed part, and is used for realizing connection transition between a blade and a spherical elastic bearing, transmitting all loads of the blade to a hub central part and realizing connection of a damper, a variable-pitch rocker arm, the spherical elastic bearing and other parts.

The hub support arm has many parts and complex structure, the blade pin is a key part for connecting the hub support arm and the blade, and the blade pin is subjected to alternating load when the rotor rotates at high speed, so that the blade pin is easy to wear and crack after long-time flight. Therefore, strength design needs to be carried out on the blade pin, so that the fatigue life of the blade pin is examined, and a basis is provided for use and maintenance of the blade pin on the helicopter.

In the past, the blade pin is not used as a separate test piece for examination, but is put together with the hub support arm for fatigue test of the hub support arm. At present, because some key processes seriously affect the fatigue performance of the blade pin, the service life of the blade pin needs to be evaluated again according to the quality consistency inspection requirement of the key processes.

Disclosure of Invention

In order to solve at least one of the above technical problems, the application provides a loading test device, including fixed subassembly and with the loading subassembly that fixed subassembly is connected, fixed subassembly with the loading subassembly is used for with the fixed test piece of first predetermined angle, the loading subassembly does when the test piece provides the loading force, make the center of test piece with be preset distance between the axis of loading subassembly.

According to at least one embodiment of the application, the fixing assembly comprises a fixing seat, a first through hole and a mounting groove are formed in the fixing seat, and the first through hole is communicated with the mounting groove, so that when the test piece penetrates through the first through hole, the part of the test piece penetrating through the fixing seat is located in the mounting groove; the loading assembly comprises a test piece joint, the test piece joint is suitable for being installed in the installation groove, and a second through hole is formed in the test piece joint; the axis of the first through hole and the axis of the second through hole deflect a second preset angle relative to the vertical direction, so that the test piece can be mounted on the fixed seat and the test piece joint at the first preset angle.

According to at least one embodiment of the application, the sum of the first preset angle and the second preset angle is 90 degrees.

According to at least one embodiment of this application, the loading subassembly still includes the adapter, the adapter with the testpieces articulate, and the axis of adapter with the axis coincidence of testpieces.

According to at least one embodiment of the application, seted up on the test piece with coaxial mounting hole, the adapter set up in the mounting hole.

According to at least one embodiment of this application, the loading subassembly still includes load loading mechanism, load loading mechanism with the adapter fixed connection and coaxial setting.

According to at least one embodiment of the present application, the fixing assembly further includes a transition plate, a fixing groove is formed in the fixing seat, and at least a portion of the transition plate is disposed in the fixing groove.

According to at least one embodiment of the present application, a third through hole is formed in a portion of the transition plate located in the fixing groove, a fourth through hole is formed in the fixing seat, and a bolt passes through the third through hole and the fourth through hole to fix the transition plate and the fixing seat.

According to at least one embodiment of the present application, a test piece support is fixedly connected to a portion of the transition plate located outside the fixing groove.

According to at least one embodiment of the application, the test piece support is fixedly connected with the load loading mechanism.

In the loading test device provided by the embodiment of the application, the mounting and fixing mode of the paddle pin on an airplane can be simulated through the fixing component and the loading component, so that the total test error can be controlled within 3% by carrying out the loading test.

Drawings

FIG. 1 is a schematic structural diagram of a loading test apparatus provided in an embodiment of the present application;

FIG. 2 is a side view of a load-test apparatus provided in an embodiment of the present application;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 4 is a schematic structural diagram of a test piece joint provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a fixing base provided in an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a transition plate provided in an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a test piece holder provided in an embodiment of the present application.

Wherein:

10. a fixing assembly; 11. a fixed seat; 111. a first through hole; 112. mounting grooves; 113. fixing grooves; 114. a fourth via hole; 12. a transition plate; 121. a third through hole; 122. a fifth through hole; 13. a test piece support; 20. loading the component; 21. a test piece joint; 211. a second through hole; 212. mounting holes; 22. an adapter; 23. a load loading mechanism; 30. a test piece; 40. and (4) fixing the platform.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the present application are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

It should be noted that the terms "first", "second", "third", "fourth" and "fifth" in the description of the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, it should be noted that, in the description of the present application, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "mounted" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those skilled in the art as the case may be.

Fig. 1 is a schematic structural diagram of a loading test apparatus provided in an embodiment of the present application, fig. 2 is a side view of the loading test apparatus provided in the embodiment of the present application, and fig. 3 is a sectional view in a direction a-a in fig. 1.

As shown in fig. 1, 2 and 3, the loading test apparatus includes a fixing assembly 10 and a loading assembly 20 connected to the fixing assembly 10, the fixing assembly 10 and the loading assembly 20 are configured to fix a test piece 30 at a first preset angle, and when the loading assembly 20 provides a loading force to the test piece 30, a preset distance is formed between the center of the test piece 30 and the axis of the loading assembly 20.

Mutually support between fixed subassembly 10 and the loading subassembly 20 for the testpieces 30 can be with first preset angle when receiving the loading force, and is preset the distance between the center of testpieces 30 and the axis of loading subassembly 20, thereby can simulate the installation boundary condition of testpieces on the aircraft, makes the test to press close to the true installation environment of testpieces as far as possible, and then reduces experimental error.

In some alternative embodiments, referring to fig. 4 and fig. 5, the fixing assembly 10 includes a fixing base 11, the fixing base 11 is provided with a first through hole 111 and a mounting groove 112, the first through hole 111 is communicated with the mounting groove 112, so that when the test piece 30 passes through the first through hole 111, a portion of the test piece 30 passing through the fixing base 11 is located in the mounting groove 112.

The loading assembly 20 comprises a test piece connector 21, the test piece connector 21 is suitable for being installed in the installation groove 112, and a second through hole 211 is formed in the test piece connector 21.

The axes of the first through hole 111 and the second through hole 211 are both deflected by a second preset angle with respect to the vertical direction, so that the test piece 30 can be mounted on the fixed seat 11 and the test piece joint 21 at the first preset angle α, and a preset angle d is formed between the center of the test piece 30 and the axis of the test piece joint 21.

In the present embodiment, the sum of the first preset angle and the second preset angle is 90 degrees.

It can be understood that different test pieces can be designed for different parts mounted on the aircraft, and the axial position of the test piece joint 21 is changed by adjusting the deflection angle of the axial lines of the first through hole 111 and the second through hole 211 and by adjusting the shape of the test piece joint 21, that is, the first preset angle α and the preset distance d are changed, so that tests are performed for different test pieces, the real mounting positions of different parts are simulated, and the test errors are reduced.

In some embodiments, with continued reference to fig. 3, the loading assembly 20 further includes an adapter 22, the adapter 22 being connected to the trial joint 21, and an axis of the adapter 22 being coincident with an axis of the trial joint 21. Optionally, a mounting hole 212 coaxial with the test piece connector 21 is formed in the test piece connector 21, and the adapter 22 is arranged in the mounting hole 212, so that the axis of the adapter 22 coincides with the axis of the test piece connector 21.

In some embodiments, the loading assembly 20 further includes a load loading mechanism 23, and the load loading mechanism 23 is fixedly connected to and coaxially disposed with the adapter 22. Optionally, a binaural support is arranged on the fixed platform 40, and the load loading mechanism 23 is connected to the binaural support through a pin.

In some embodiments, referring to fig. 5 and fig. 6, the fixing assembly 10 further includes a transition plate 12, the fixing base 11 is formed with a fixing groove 113, and the transition plate 12 is at least partially disposed in the fixing groove 113. Optionally, a third through hole 121 is formed in a portion of the transition plate 12 located in the fixing groove 113, a fourth through hole 114 is formed in the fixing base 11, and a bolt passes through the third through hole 121 and the fourth through hole 114 to fix the transition plate 12 and the fixing base 11.

In some embodiments, referring to fig. 6 and 7, the test piece holder 13 is fixedly connected to the portion of the transition plate 12 located outside the fixing groove 113. Optionally, a fifth through hole 122 is formed in a portion of the transition plate 12 located outside the fixing groove 113, a protrusion is formed on the test piece support 13, a threaded hole is formed in the protrusion, and the transition plate 12 is connected to the test piece support 13 by a bolt passing through the fifth through hole 122 and being connected to the threaded hole.

In some embodiments, the load applying mechanism 23 and the test piece holder 13 are both fixedly connected to the fixed platform 40.

So far, the technical solutions of the present application have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present application is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the present application, and the technical scheme after the changes or substitutions will fall into the protection scope of the present application.

Claims

1. A loading test device is characterized by comprising a fixing component (10) and a loading component (20) connected with the fixing component (10), wherein the fixing component (10) and the loading component (20) are used for fixing a test piece (30) at a first preset angle, and when the loading component (20) provides loading force for the test piece (30), a preset distance is formed between the center of the test piece (30) and the axis of the loading component (20);

the fixing component (10) comprises a fixing seat (11), a first through hole (111) and a mounting groove (112) are formed in the fixing seat (11), the first through hole (111) is communicated with the mounting groove (112), so that when the test piece (30) penetrates through the first through hole (111), the part, penetrating through the fixing seat (11), of the test piece (30) is located in the mounting groove (112);

the loading assembly (20) comprises a test piece joint (21), the test piece joint (21) is suitable for being installed in the installation groove (112), and a second through hole (211) is formed in the test piece joint (21);

the axis of the first through hole (111) and the axis of the second through hole (211) both deflect a second preset angle relative to the vertical direction, so that the test piece (30) can be mounted on the fixed seat (11) and the test piece joint (21) at the first preset angle.

2. The load testing device of claim 1, wherein the sum of said first predetermined angle and said second predetermined angle is 90 degrees.

3. A load testing device according to claim 1, wherein the loading assembly (20) further comprises an adapter (22), the adapter (22) being connected to the test piece joint (21) and the axis of the adapter (22) coinciding with the axis of the test piece joint (21).

4. The loading test device according to claim 3, wherein the test piece connector (21) is provided with a mounting hole (212) coaxial with the test piece connector, and the adapter (22) is arranged in the mounting hole (212).

5. The loading test device of claim 4, wherein the loading assembly (20) further comprises a load loading mechanism (23), the load loading mechanism (23) being fixedly connected to the adapter (22) and coaxially disposed.

6. The loading test device according to claim 5, wherein the fixing assembly (10) further comprises a transition plate (12), the fixing seat (11) is provided with a fixing groove (113), and the transition plate (12) is at least partially disposed in the fixing groove (113).

7. The loading test device according to claim 6, wherein a third through hole (121) is formed in a portion of the transition plate (12) located in the fixing groove (113), a fourth through hole (114) is formed in the fixing seat (11), and a bolt is inserted through the third through hole (121) and the fourth through hole (114) to fix the transition plate (12) and the fixing seat (11).

8. The loading test device according to claim 7, characterized in that a test piece holder (13) is fixedly connected to the portion of the transition plate (12) located outside the fixing groove (113).

9. The loading test device according to claim 8, further comprising a fixed platform (40), wherein the load loading mechanism (23) and the test piece holder (13) are both fixedly connected to the fixed platform (40).