A hail impact test platform

Abstract

The application provides a hail impact test platform, which comprises a test table movable frame and a disc base, the disc base is rotatably fixed on the test table movable frame; a column support and a main base, the bottom of the column support and the main base are fixed on the disc base, and the column surface of the column support faces the hail impact direction; a liftable main support and a test piece fixing assembly, the liftable main support is fixed on the top of the main base, and the test piece fixing assembly is fixed with the liftable main support. The test piece fixing assembly comprises a flat plate test piece fixing assembly and a rotor test piece fixing assembly with a rotating shaft, the flat plate test piece is fixed on the impact test platform through the flat plate test piece fixing assembly, and the rotor test piece with the rotating shaft is fixed on the test platform through the rotor test piece fixing assembly with the rotating shaft. The test platform can be used for quickly assembling and debugging the test piece, part of the adapter element of the flat plate test piece is completely suitable for the rotor test piece with the rotating shaft, and good economy is achieved.

Description

Technical Field

[0001] This specification relates to the technical field of impact test platforms, and specifically to a hail impact test platform. Background Art

[0002] Hail impact tests are required for the development of aircraft engines. To ensure the smooth implementation of hail impact tests on the entire aircraft, hail impact tests on components are generally carried out before hail impact tests on the entire aircraft.

[0003] Because the test required front-to-back, left-to-right, and up-and-down position adjustment, as well as the need to alter the angle of hail during testing by adjusting the test piece's angle, there were no existing prototypes or similar products to draw upon. This necessitated a completely new design for a comprehensive test platform for component hail impact testing. Existing adapter structures for related tests met the strength and stiffness requirements for conducting the tests, but their adjustability, convenience, and cost-effectiveness were insufficiently considered. Summary of the Invention

[0004] In view of this, the embodiments of this specification provide a hail impact test platform to achieve the purpose of adjusting the position of the test piece while taking into account the compatibility of the test piece.

[0005] The embodiments of this specification provide the following technical solutions:

[0006] A hail impact test platform, comprising:

[0007] The test bench movable frame and the disc base, the disc base is rotatably fixed on the test bench movable frame;

[0008] The column support and the main base are fixed on the disc base, and the column surface of the column support is arranged toward the side impacted by hail.

[0009] The main support can be lifted and lowered, and the test piece fixing assembly can be lifted and lowered. The main support can be lifted and lowered, and the test piece fixing assembly can be fixed to the top of the main base.

[0010] Furthermore, the test piece fixing assembly includes a flat test piece fixing assembly and a rotor test piece fixing assembly with a rotating shaft. The flat test piece is fixed on the hail impact test platform through the flat test piece fixing assembly, and the rotor test piece with a rotating shaft is fixed on the hail impact test platform through the rotor test piece fixing assembly with a rotating shaft.

[0011] Furthermore, a plurality of mounting holes are arranged at intervals in the horizontal direction of the liftable main support, and the flat test piece fixing assembly and the rotor test piece fixing assembly with a rotating shaft are both fixed to the liftable main support through the mounting holes.

[0012] Furthermore, the flat plate test piece fixing assembly includes a first flat plate support and a second flat plate support, the first flat plate support and the second flat plate support are fixed at intervals on the top of the liftable main support, and the flat plate test piece is fixed between the first flat plate support and the second flat plate support.

[0013] Furthermore, the first flat plate support and the second flat plate support are both provided with long slot holes, which correspond one-to-one to the mounting holes of the liftable main support. The corresponding positions of the mounting holes can be adjusted within the horizontal range of the long slot holes. Bolts pass through the long slot holes and the mounting holes to fix the first flat plate support to the liftable main support and the second flat plate support to the liftable main support respectively.

[0014] Furthermore, the rotor test piece fixing assembly with a rotating shaft includes a main mounting seat, a liftable sub-support and a sub-base. The bottom of the main mounting seat is fixed on the liftable main support, the side of the main mounting seat facing the hail impact direction is fixed on the column support, and the bottom of the sub-base is fixed on the disc base. One end of the rotating shaft of the rotor test piece with a rotating shaft is connected to the main mounting seat, and the other end of the rotating shaft of the rotor test piece with a rotating shaft is connected to the sub-base through the liftable sub-support.

[0015] Furthermore, a long slot hole is provided on the main mounting seat, and the long slot hole corresponds one-to-one with the mounting hole of the liftable main support. The corresponding position of the mounting hole can be adjusted within the horizontal range of the long slot hole. The bolt passes through the long slot hole and the mounting hole to fix the main mounting seat to the liftable main support.

[0016] Furthermore, a first adjusting nut is provided between the liftable auxiliary support and the auxiliary base, and the liftable auxiliary support is adjusted in relative height to the auxiliary base through the first adjusting nut.

[0017] Furthermore, a plurality of mounting slots are provided at intervals in the height direction of the column support, and the flat test piece fixing assembly or the rotor test piece fixing assembly with a rotating shaft is fixed to the column support through the mounting slots on the side facing the hail impact.

[0018] Furthermore, the disc base is provided with a plurality of arc-shaped slots along the circumferential direction, and the test bench movable frame is provided with a plurality of test bench mounting holes. The positions of the test bench mounting holes and the arc-shaped slots correspond to each other, and the horizontal position of the test bench mounting holes can be adjusted within the range of the movable arc-shaped slots. Bolts pass through the arc-shaped slots and the test bench mounting holes to fix the disc base to the test bench movable frame.

[0019] Furthermore, a second adjusting nut is provided between the liftable main support and the main base, and the relative height of the liftable main support and the main base is adjusted by the second adjusting nut.

[0020] Compared with the prior art, the at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects:

[0021] The hail impact test platform of the embodiment of the present invention has good adjustability, which is conducive to the rapid assembly and debugging of the test piece; some adapter elements of the flat test piece are fully applicable to the rotor test piece with a rotating shaft, and have good economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 1 is a schematic structural diagram of a test platform for a hail impact test of a rotor test piece with a rotating shaft according to an embodiment of the present invention;

[0024] Figure 2 1 is a schematic structural diagram of a test platform for hail impact testing of a metal flat plate test piece according to an embodiment of the present invention;

[0025] Figure 3 is a top view of the test platform after the rotor blade test piece is installed at a certain test angle according to an embodiment of the present invention;

[0026] Figure 4 yes Figure 3 A top view of the rotor blade test piece after changing the angle.

[0027] Explanation of the accompanying reference numerals: 1. Disc base; 101. Arc-shaped slot; 2. Column support; 3. Main base; 4. Liftable main support; 5. First flat plate support; 6. Second flat plate support; 7. Main mounting seat; 8. Liftable auxiliary support; 9. Auxiliary base; 10. Rotor test piece with rotating shaft; 11. Test bench movable frame. DETAILED DESCRIPTION

[0028] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0029] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0030] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0031] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0032] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples. However, one skilled in the art will appreciate that the aspects described can be practiced without these specific details.

[0033] In hail impact tests, the following test equipment factors need to be considered in the design of the comprehensive test platform:

[0034] 1) Once the air cannon launch angle is adjusted, it will remain unchanged during the test. To achieve hail impact tests at different angles and locations, the angle and position of the test piece must be adjusted.

[0035] 2) The test bench base cannot achieve fine adjustment of the test piece position, which needs to be achieved through a transfer structure.

[0036] Therefore, in order to ensure the smooth progress of the test, the following points must be considered when designing the test platform:

[0037] 1) It should have the function of multi-degree-of-freedom adjustment;

[0038] 2) It should have sufficient strength and be able to ensure that the main body of the test piece does not loosen under the action of impact force;

[0039] 3) It should have a certain rigidity to ensure that the test platform does not deform during the test;

[0040] 4) The test platform must be usable and easy to disassemble and assemble;

[0041] 5) Since hail impact tests need to be carried out on a variety of components, the compatibility of different test pieces should be achieved as much as possible when designing the test platform to improve the economy of the test platform design.

[0042] In order to realize the purpose of using the test platform for various hail impact tests, the embodiment of the present invention designs test piece fixing assemblies with different structures as interfaces for installing test pieces with different structures.

[0043] The following describes the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0044] like Figure 1 and Figure 2 As shown, the hail impact test platform of the present embodiment includes: a test bench movable frame 11, a disc base 1, a column support 2, a main base 3, a liftable main support 4, and a test piece fixing assembly. The disc base 1 is rotatably fixed to the test bench movable frame 11. The bottoms of the column support 2 and the main base 3 are both fixed to the disc base 1, with the column surface of the column support 2 facing the side of the hail impact. The liftable main support 4 is fixed to the top of the main base 3, and the test piece fixing assembly is fixed to the liftable main support 4.

[0045] The test piece fixing assembly includes a flat test piece fixing assembly and a rotor test piece fixing assembly with a rotating shaft. The flat test piece fixing assembly is used to fix a flat test piece (metal flat plate, etc.), and the rotor test piece fixing assembly with a rotating shaft is used to fix a rotor test piece 10 with a rotating shaft.

[0046] The liftable main support 4 is provided with a plurality of mounting holes at intervals in the horizontal direction, and the flat test piece fixing assembly and the rotor test piece fixing assembly with a rotating shaft are both fixed to the liftable main support 4 through the mounting holes.

[0047] Specifically, the experimental platform used for the test piece is a rotor blade disk. Figure 1As shown, the test platform is used to mount rotor blisk test specimens. It comprises a disc base 1, a column support 2, a main base 3, a liftable main support 4, and a rotor test specimen mounting assembly with a rotating shaft. The rotor test specimen mounting assembly with a rotating shaft comprises a main mounting base 7, a liftable secondary support 8, and a secondary base 9. Assembly of the rotor blisk hail impact test specimen requires only the removal of the flat metal hail impact test specimen and its interface, followed by the installation of the rotor blisk hail impact test specimen and its interface.

[0048] The main mounting base 7 is designed with a horizontally adjustable slotted hole structure. The slotted hole corresponds to the mounting hole of the liftable main support, and the corresponding position of the mounting hole can be adjusted within the horizontal range of the slotted hole. Bolts pass through the slotted hole and the mounting hole to secure the main mounting base 7 to the liftable main support 4. The slotted hole allows for fine horizontal adjustment of the rotor test piece 10 with a rotating shaft. If the impact point of the hailstone shifts horizontally, the left and right position of this structure can be adjusted to better meet the target.

[0049] Specifically, the experimental platform used for the test piece is a metal flat plate. Figure 2 As shown, the test platform is used to mount a metal flat specimen. It comprises a disc base 1, a column support 2, a main base 3, a liftable main support 4, and a flat specimen mounting assembly. The assembly comprises a first flat support 5 and a second flat support 6. These are fixed to the top of the liftable main support 4 with a gap between them, with the flat specimen secured between them.

[0050] Both the first and second flat supports 5, 6 are designed with slotted holes in their horizontal direction. These slotted holes correspond to the mounting holes of the liftable main support 4, allowing for fine-tuning of the horizontal position of the metal flat test piece. If the impact point of hail shifts horizontally, the left and right positions of these structures can be adjusted to better meet the desired impact point.

[0051] The disc base 1, column support 2, main base 3, and liftable main support 4 in the two test platforms are common parts. The column support 2 is used to effectively resist the frontal impact of hail. As a common part, the column support 2 is provided with a plurality of mounting slots at intervals in the height direction. The flat test piece fixing assembly or the rotor test piece fixing assembly with a rotating shaft is fixed to the column support 2 through the mounting slots on the side facing the hail impact. When designing the position of the mounting slots, it is necessary to comprehensively consider the height difference of the assembly positions of different test pieces and the adjustable height of the rotor blade disk component test piece. The purpose of adjusting the height of the flat test piece fixing assembly or the rotor test piece fixing assembly with a rotating shaft is achieved by using mounting slots at different heights. A slot structure is provided at the bottom of the column support 2. The column support 2 is the last assembled part and needs to be fixed on the disc base 1. The slot structure at the bottom is used to facilitate the disassembly and assembly of parts.

[0052] The main liftable support 4 is connected to the main base 3 via a nut, and the height of the main liftable support 4 can be adjusted by adjusting the nut. The main liftable support 4 has multiple second adjustment nuts, which are located on the upper and lower sides of the upper end surface of the main base 3. After the second adjustment nuts are adjusted into place, they are tightened to achieve positioning. The auxiliary liftable support 8 is connected to the auxiliary base 9 via a first adjustment nut, and the height of the auxiliary liftable support 8 can be adjusted by adjusting the first adjustment nut. The auxiliary liftable support 8 has multiple adjustment nuts, which are located on the upper and lower sides of the upper end surface of the auxiliary base 9. After the first adjustment nuts are adjusted into place, they are tightened to achieve positioning. When designing the thread lengths of the main liftable support 4 and the auxiliary liftable support 8, the blade height of the rotor test piece 10 with a rotating shaft must be considered. Without replacing the adapter interface, the target point height requirement of the hail impact test of the rotor blade component can be achieved by simply adjusting the height of the liftable structure, that is, the lifting structure composed of the liftable main support 4 and the liftable auxiliary support 8 ensures that the target points of the hail are respectively located at the root, middle and tip of the rotor test blade 10 with a rotating axis.

[0053] The main function of the disc base 1 is to change the incident angle of hail. Figure 3 、 Figure 4As shown, the test piece has an angle change of 15 degrees relative to the test bench movable frame 11, and the value of the angle change should be determined according to the requirements of the specific test. The relative angle between the disc base 1 and the test bench movable frame 11 is changed by rotating the disc base 1 to achieve the change of the hail incident angle of the test piece. A movable arc slot 101 is provided on the disc base 1, and a test bench mounting hole is provided on the test bench movable frame 11. The corresponding position of the test bench mounting hole can be moved within the range of the movable arc slot 101. After determining the incident angle, the disc base 1 and the test bench movable frame 11 are fixed by installing bolts through the movable arc slot 101 and the test bench mounting hole. When designing the arc slot 101, it is necessary to avoid structural interference with the column support 2, the main base 3 and the auxiliary base 9. In order to ensure the connection stiffness of the disc base 1 and the test bench movable frame 11, a sufficient number of arc slots 101 should be ensured when designing the disc base 1, and the arc slots 101 should be evenly distributed on the circumference of the disc base 1 as much as possible. By rotating and adjusting the disc base 1, the requirement that the test piece needs to be tested at multiple incident angles during the hail impact test is met.

[0054] In order to improve the economic efficiency of the test platform, all threads in the hail impact test platform of the embodiment of the present invention preferably use ordinary thread structures, and the threaded connectors preferably use national standard parts that can be directly purchased.

[0055] During implementation, the hail impact test is generally performed in the order of first performing the hail impact test on the metal flat plate and then performing the hail impact test on the rotor blade disk.

[0056] In some embodiments, the assembly order of the flat plate test piece is as follows: first, fix the disc base 1 to the test bench movable frame 11 with bolts; fix the main base 3 to the disc base 1 with bolts; install the liftable main support 4 on the main base 3 with bolts; adjust the position of the nut to adjust the liftable main support 4 to the position required for the test; install the first flat plate support 5 and the second flat plate support 6 on the liftable main support 4 with bolts, fix the rear ends of the first flat plate support 5 and the second flat plate support 6 to the column support 2 with bolts, and fix the two ends of the metal flat plate test piece of the test object to the first flat plate support 5 and the second flat plate support 6 respectively with bolts.

[0057] In some embodiments, the installation steps for replacing the rotor blade disk hail impact test piece are as follows: first, remove the metal flat plate hail impact test piece and its corresponding flat plate test piece fixing assembly, and the removal order is: remove the connection between the column support 2 and the first flat plate support 5 and the second flat plate support 6, and remove the connection between the liftable main support 4 and the first flat plate support 5 and the second flat plate support 6; then, assemble the rotor blade disk hail impact test piece and its interface, and the assembly order is: fix the sub-base 9 to the disc base 1 by bolts, install the liftable sub-support 8 on the sub-base 9, adjust the liftable main support 4 and the liftable sub-support 8 to the height position required for the test, fix the main mounting seat 7 to the liftable main support 4 by bolts, assemble one end of the adapter shaft of the rotor test piece 10 with a rotating shaft on the main mounting seat 7, and place the other end of the rotor test piece 10 with a rotating shaft on the liftable sub-support 8, and fix the main mounting seat 7 to the column support 2 by bolts.

[0058] During implementation, the method for changing the installation angle of the hail impact test piece is: there is no need to disassemble the test piece fixing assembly and the test piece assembled above the disc base 1, only the mounting bolts on the hole groove of the disc base 1 need to be loosened, the disc base 1 is rotated, and the test piece fixing assembly and the test piece assembled above the disc base 1 are driven to the specified angle, and then the disc base 1 and the test bench movable frame 11 are fixed by bolts.

[0059] When designing the embodiment of the present invention, the structural characteristics of the test piece are combined with the economic efficiency of the test. While designing universal parts, it also ensures that the two test pieces can be reliably installed in their respective tests. The design scheme provided by the present invention not only saves manufacturing costs, but also saves the assembly time of parts, speeding up the progress of the test work. The hail impact test platform of the embodiment of the present invention can be used as a transition structure between the hail impact test piece and the existing installation interface of the laboratory, ensuring that the hail impact test piece is reliably installed on the laboratory interface, and ensuring the smooth implementation of hail impact tests on various types of components.

[0060] The beneficial effects of the embodiments of the present invention are as follows: the target point and the hail incident angle are both well adjustable, which is beneficial to the rapid assembly and debugging of the test piece; it has good economy, and some adapter parts of the metal flat plate test piece are fully applicable to the rotor test piece with a rotating shaft; it has strong impact resistance, and can ensure that the test piece does not fall off the test platform and the test platform does not deform under the impact of high-speed hail.

[0061] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences from other embodiments. In particular, the method embodiments described later are relatively simple to describe because they correspond to the system. For relevant parts, refer to the description of the system embodiments.

[0062] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A hail impact test platform, characterized in that: include: A test bench movable frame (11) and a disc base (1), wherein the disc base (1) is rotatably fixed on the test bench movable frame (11); The column support (2) and the main base (3) are fixed to the disc base (1) at their bottoms, and the column surface of the column support (2) is arranged toward the side impacted by hail. A liftable main support (4) and a test piece fixing assembly, wherein the liftable main support (4) is fixed on the top of the main base (3), and the test piece fixing assembly is fixed to the liftable main support (4); The test piece fixing assembly comprises a flat test piece fixing assembly and a rotor test piece fixing assembly with a rotating shaft, the flat test piece is fixed to the hail impact test platform via the flat test piece fixing assembly, and the rotor test piece (10) with a rotating shaft is fixed to the hail impact test platform via the rotor test piece fixing assembly with a rotating shaft; The liftable main support (4) is provided with a plurality of mounting holes at intervals in the horizontal direction, and the flat test piece fixing assembly and the rotor test piece fixing assembly with a rotating shaft are both fixed to the liftable main support (4) through the mounting holes; The rotor test piece fixing assembly with a rotating shaft comprises a main mounting seat (7), a liftable auxiliary support (8) and an auxiliary base (9), wherein the bottom of the main mounting seat (7) is fixed on the liftable main support (4), the side of the main mounting seat (7) facing the hail impact direction is fixed on the column support (2), the bottom of the auxiliary base (9) is fixed on the disc base (1), one end of the rotating shaft of the rotor test piece (10) with a rotating shaft is connected to the main mounting seat (7), and the other end of the rotating shaft of the rotor test piece (10) with a rotating shaft is connected to the auxiliary base (9) via the liftable auxiliary support (8); A long slotted hole is provided on the main mounting seat (7), and the long slotted hole corresponds one-to-one with the mounting hole of the liftable main support (4). The corresponding position of the mounting hole can be adjusted within the horizontal range of the long slotted hole. Bolts pass through the long slotted hole and the mounting hole to fix the main mounting seat (7) to the liftable main support (4).

2. The hail impact test platform according to claim 1, characterized in that: The flat plate test piece fixing assembly comprises a first flat plate support (5) and a second flat plate support (6), wherein the first flat plate support (5) and the second flat plate support (6) are fixed at intervals on the top of the liftable main support (4), and the flat plate test piece is fixed between the first flat plate support (5) and the second flat plate support (6).

3. The hail impact test platform according to claim 2, characterized in that: The first flat plate support (5) and the second flat plate support (6) are both provided with long slot holes in the horizontal direction. The long slot holes correspond one-to-one with the mounting holes of the liftable main support (4). The corresponding positions of the mounting holes can be adjusted within the horizontal range of the long slot holes. Bolts pass through the long slot holes and the mounting holes to fix the first flat plate support (5) to the liftable main support (4) and the second flat plate support (6) to the liftable main support (4).

4. The hail impact test platform according to claim 1, characterized in that: A first adjusting nut is provided between the liftable auxiliary support (8) and the auxiliary base (9), and the relative height of the liftable auxiliary support (8) and the auxiliary base (9) is adjusted by the first adjusting nut.

5. The hail impact test platform according to claim 1, characterized in that: A plurality of mounting slots are provided at intervals in the height direction of the column support (2); the side of the flat test piece fixing assembly or the rotor test piece fixing assembly with a rotating shaft facing the hail impact is fixed to the column support (2) through the mounting slots.

6. The hail impact test platform according to claim 1, characterized in that: The disc base (1) is provided with a plurality of arc-shaped slot holes (101) along the circumferential direction, and the test bench movable frame (11) is provided with a plurality of test bench mounting holes, the test bench mounting holes and the arc-shaped slot holes (101) correspond in position, and the horizontal position of the test bench mounting holes can be adjusted within the range of the movable arc-shaped slot holes (101), and bolts pass through the arc-shaped slot holes (101) and the test bench mounting holes to fix the disc base (1) and the test bench movable frame (11).

7. The hail impact test platform according to claim 1, characterized in that: A second adjustment nut is provided between the liftable main support (4) and the main base (3), and the liftable main support (4) is adjusted in relative height to the main base (3) via the second adjustment nut.

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