Swing test device and system for flexible joint

Abstract

The invention discloses a swing test device and system of a flexible joint, and relates to the technical field of flexible joint testing, the swing test device of the flexible joint comprises a cylinder body, a fixing assembly, a swing assembly and a driving assembly, the fixing assembly is arranged on the cylinder body, and the swing assembly is arranged on the cylinder body. The bottom end of the fixing assembly is connected with a flexible connector arranged above the cylinder body, the swing assembly is arranged above the cylinder body, the bottom of the swing assembly is connected with the flexible connector, and a closed cavity is formed among the swing assembly, the flexible connector, the fixing assembly and the cylinder body. The driving assembly is arranged on one side of the cylinder body, is connected with the swinging assembly, is used for driving the swinging assembly to swing on the flexible joint, and can pressurize a closed cavity formed among the swinging assembly, the flexible joint, the fixing assembly and the cylinder body to simulate a high-pressure environment so as to test the stability, the bearing performance and the swinging performance of the flexible joint; the test precision is ensured, and the test difficulty and the test cost are low.

Description

Technical Field

[0001] The present invention relates to the technical field of flexible joint testing, and in particular to a swing test device and system for a flexible joint. Background Art

[0002] The flexible swinging nozzle of a solid rocket engine is a form of thrust vector control mechanism. It has the characteristics of low thrust loss, self-sealing, and the ability to swing on all axes. It has been used in a variety of missile weapons and launch vehicles. The flexible joint is a key component of the flexible swinging nozzle. It determines important performance such as the swing torque characteristics, load-bearing capacity, and control accuracy. Therefore, various tests on the flexible joint are required.

[0003] However, it is difficult for the test device in the prior art to simulate a high-pressure environment to test the stability, load-bearing and swing performance of the flexible joint. Summary of the Invention

[0004] The embodiments of the present invention provide a swing test device and system for a flexible joint to solve the technical problem in the related art that existing test devices are difficult to simulate high-pressure environments to test the stability, load-bearing and swing performance of flexible joints.

[0005] In a first aspect, a swing test device for a flexible joint is provided, comprising: Cylinder body; A fixing assembly, the fixing assembly being arranged on the cylinder body, wherein the bottom end of the fixing assembly is connected to a flexible joint arranged above the cylinder body; A swing assembly is provided above the cylinder body, the bottom of the swing assembly is connected to the flexible joint, and a closed cavity is formed between the swing assembly, the flexible joint, the fixed assembly, and the cylinder body; A driving assembly is provided on one side of the cylinder body and connected to the swing assembly, and is used to drive the swing assembly to swing on the flexible joint.

[0006] In some embodiments, the swing assembly includes: A connecting shell, the connecting shell being vertically arranged above the cylinder base, the bottom end of the connecting shell being connected to the flexible joint; A connecting column, which is vertically arranged above the connecting shell and connected to the top of the connecting shell; A push-pull beam is horizontally arranged at the top of the connecting column. One side of the push-pull beam is connected to the driving assembly. The driving assembly drives the push-pull beam, the connecting column, and the connecting shell to swing on the flexible joint.

[0007] In some embodiments, the swing assembly further comprises: A partition is provided between the connecting shell and the connecting column along a horizontal direction, and the partition forms a partition structure between the connecting shell and the connecting column.

[0008] In some embodiments, the thickness of the partition is smaller than the thickness of the connecting shell and the cylinder body.

[0009] In some embodiments, the connecting column is a cone structure with a hollow center.

[0010] In some embodiments, the push-pull beam is a hollow inverted trapezoidal structure, and a side of the push-pull beam connected to the driving assembly extends toward the outside of the cylinder body to increase the swing arm.

[0011] In some embodiments, the swing test device for the flexible joint further comprises: A fixing lug is provided on one side of the cylinder body and connected to the fixing assembly. The fixing lug is also connected to the bottom end of the driving assembly for fixing the driving assembly.

[0012] In some embodiments, the driving assembly is a servo hydraulic cylinder, the top end of the servo hydraulic cylinder is connected to the push-pull beam, the bottom end of the servo hydraulic cylinder is connected to the fixed support ear, and the servo hydraulic cylinder is telescopic along its length to push and pull the push-pull beam.

[0013] In some embodiments, the fixing assembly is a flange inverted cone structure, the top end of the flange inverted cone is connected to the cylinder body, and the bottom end of the flange inverted cone is connected to the flexible joint.

[0014] In a second aspect, a swing test system for a flexible joint is provided, comprising the aforementioned swing test device for a flexible joint.

[0015] The beneficial effects brought about by the technical solution provided by the present invention include: An embodiment of the present invention provides a swing test device and system for a flexible joint, wherein the swing test device for the flexible joint includes: a cylinder body, a fixed component, a swing component and a driving component, wherein the fixed component is arranged on the cylinder body, and the bottom end of the fixed component is connected to the flexible joint arranged above the cylinder body, the swing component is arranged above the cylinder body, and the bottom of the swing component is connected to the flexible joint, and a closed cavity is formed between the swing component and the flexible joint, the fixed component and the cylinder body, and the driving component is arranged on one side of the cylinder body and connected to the swing component, and is used to drive the swing component to swing on the flexible joint, and can apply pressurization to the closed cavity formed between the swing component and the flexible joint, the fixed component and the cylinder body to simulate a high-pressure environment to test the stability, load-bearing and swing performance of the flexible joint, thereby ensuring test accuracy and low test difficulty and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic structural diagram of a swing test device for a flexible joint provided in an embodiment of the present invention; Reference numerals: 1. Cylinder body; 2. Fix the components; 3. Flexible joint; 4. Swing assembly; 41. Connecting shell; 42. Connecting column; 43. Push-pull beam; 44. Partition; 5. Drive components; 6. Fix the lugs. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0019] An embodiment of the present invention provides a swing test device for a flexible joint, which can solve the technical problem in the related art that existing test devices are difficult to simulate high-pressure environments to test the stability, load-bearing and swing performance of flexible joints.

[0020] Figure 1 An embodiment of the present invention provides a swing test device for a flexible joint, comprising: a cylinder body 1, a fixed component 2, a swing component 4 and a drive component 5, wherein the fixed component 2 is arranged on the cylinder body 1, and the bottom end of the fixed component 2 is connected to the flexible joint 3 arranged above the cylinder body 1, the swing component 4 is arranged above the cylinder body 1, and the bottom of the swing component 4 is connected to the flexible joint 3, and a closed cavity is formed between the swing component 4 and the flexible joint 3, the fixed component 2 and the cylinder body 1, and the drive component 5 is arranged on one side of the cylinder body 1 and connected to the swing component 4, for driving the swing component 4 to swing on the flexible joint 3.

[0021] An embodiment of the present invention provides a swing test device for a flexible joint, which includes a cylinder, a fixing assembly, a swing assembly, and a driving assembly. The fixing assembly is provided on the cylinder, and the bottom end of the fixing assembly is connected to the flexible joint provided above the cylinder. The cylinder is a high-pressure cylinder. The fixing assembly is used to fix the flexible joint. The swing assembly is provided above the cylinder, and the bottom end of the swing assembly is connected to the flexible joint. A closed cavity is formed between the swing assembly, the flexible joint, the fixing assembly, and the cylinder. The driving assembly is provided on one side of the cylinder and connected to the swing assembly, and is used to drive the swing assembly to swing on the flexible joint. A high-pressure test environment is formed by pressurizing a medium in the closed cavity formed between the swing assembly, the flexible joint, the fixing assembly, and the cylinder. Under high-pressure conditions, a push-pull force is applied to the swing assembly by the driving assembly, causing the swing assembly to swing on the flexible joint. The stability, load-bearing capacity, swing performance, and static zero length of the flexible joint are tested. The high-pressure environment can be simulated at any time to test the stability, load-bearing capacity, and swing performance of the flexible joint, thereby ensuring test accuracy and reducing test difficulty and cost.

[0022] As an optional implementation, in one embodiment of the invention, see Figure 1As shown, the swing assembly 4 includes: a connecting shell 41, a connecting column 42, and a push-pull beam 43. The connecting shell 41 is arranged above the cylinder body 1 in the vertical direction. The bottom end of the connecting shell 41 is connected to the flexible joint 3. The connecting column 42 is arranged above the connecting shell 41 in the vertical direction and is connected to the top of the connecting shell 41. The push-pull beam 43 is arranged at the top of the connecting column 42 in the horizontal direction. One side of the push-pull beam 43 is connected to the driving assembly 5. The driving assembly 5 drives the push-pull beam 43, the connecting column 42, and the connecting shell 41 to swing on the flexible joint 3. The connecting shell 41 is a diffusion section shell. By using the diffusion section shell and the The flexible joint 3 connects and replaces the existing tooling, which can better test the deformation of the structural rigidity of the connecting shell 41 under push-pull and pressure states, as well as test the sealing performance of the connecting shell 41 during the swinging process, and more accurately evaluate the swing interference of the flexible joint 3 under high pressure; the connecting column 42 and the push-pull beam 43 are both connecting structures between the flexible joint 3, the connecting shell 41 and the driving component 5. When the driving component 5 pushes and pulls the push-pull beam 43, the push-pull beam 43 drives the connecting column 42 and the connecting shell 41 to swing left and right on the flexible joint 3, thereby testing the stability, load-bearing capacity, swing performance and static zero length of the flexible joint 3.

[0023] As an optional implementation, in one embodiment of the invention, see Figure 1 As shown, the swing component 4 also includes: a partition 44, which is arranged between the connecting shell 41 and the connecting column 42 in the horizontal direction, and the partition 44 forms a partition structure between the connecting shell 41 and the connecting column 42. The circumferential size of the partition 44 is consistent with the circumferential size of the top of the connecting shell 41 and the bottom of the connecting column 42, so that a closed cavity is formed between the partition 44 and the flexible joint 3, the fixed component 2, and the cylinder body 1, which is convenient for pressurizing the medium in the cylinder body 1 to simulate a high-pressure environment. In addition, the partition structure formed by the partition 44 can also form a structure specifically for releasing pressure. The partition 44 can also deform alone under pressure to prevent the connecting shell 41, the fixed component 2, and the cylinder body 1 from deformation, and the deformation of the partition 44 does not affect the swing performance of the swing component 4 and the stability of the flexible joint 3, thereby ensuring the test accuracy.

[0024] As an optional implementation, in one embodiment of the invention, see Figure 1As shown, the thickness of the partition 44 is smaller than the thickness of the connecting shell 41 and the cylinder body 1. The thinner thickness of the partition 44 makes it easier to deform under pressure, taking the main deformation and pressure impact, and avoiding deformation of the connecting shell 41 and the cylinder body 1.

[0025] As an optional implementation, in one embodiment of the invention, see Figure 1 As shown, the connecting column 42 is a cone structure with a hollow center. The hollow cone structure in the center ensures the rigidity and stability of the swing component 4 under large servo force, and the hollow cavity space in the center can release the deformation of the partition 44 under high pressure, that is, when the medium is pressurized in the closed cavity formed between the swing component 4 and the flexible joint 3, the fixed component 2, and the cylinder 1 to form a high-pressure test environment, the deformation of the partition 44 under high pressure is released through the hollow cavity in the center of the connecting column 42, so that the partition 44 bulges and deforms toward the hollow cavity in the center of the connecting column 42 under pressure, thereby avoiding the deformation of the connecting shell 41 affecting the stability, load-bearing and swing performance of the flexible joint 3; the connecting column 42 can also be a hollow cylindrical structure in the center or a hollow square column structure in the center.

[0026] As an optional implementation, in one embodiment of the invention, see Figure 1 As shown, the push-pull beam 43 is a hollow inverted trapezoidal structure, and the side of the push-pull beam 43 connected to the drive component 5 extends to the outside of the cylinder body 1 to increase the swing force arm. The side of the push-pull beam 43 connected to the drive component 5 extends to the outside of the cylinder body 1, which can move the connection point between it and the drive component 5 outward, increase the vertical distance from the line of action of the force to the rotation axis, and effectively increase the operating force arm of the connecting shell 41, the connecting column 42, and the push-pull beam 43, thereby reducing the demand for the force of the drive component 5.

[0027] As an optional implementation, in one embodiment of the invention, see Figure 1As shown, the swing test device of the flexible joint also includes: a fixed lug 6, which is provided on one side of the cylinder body 1 and connected to the fixed component 2, and the fixed lug 6 is also connected to the bottom end of the drive component 5 for fixing the drive component 5. The fixed lug 6 is used to fix the bottom end of the drive component 5 to the fixed component 2 to ensure that the drive component 5 does not move or shake during operation, and also plays a guiding role, so that the drive component 5 can extend and retract along its fixed direction and generate push and pull forces; in addition, the fixed lug 6 usually takes into account maintenance and replacement needs and adopts a detachable connection method, such as bolt connection, etc. When maintenance or replacement of parts is required, it is only necessary to remove the bolts on the fixed lug 6 to achieve disassembly and replacement, which is convenient and quick.

[0028] As an optional implementation, in one embodiment of the invention, see Figure 1 As shown, the driving component 5 is a servo hydraulic cylinder, the top end of the servo hydraulic cylinder is connected to the push-pull beam 43, and the bottom end of the servo hydraulic cylinder is connected to the fixed support ear 6. The servo hydraulic cylinder extends and contracts along its length direction to push and pull the push-pull beam 43. The control accuracy of the servo hydraulic cylinder is high and it can achieve small motion adjustments. By applying a controllable push and pull force to the push-pull beam 43, the connecting shell 41 and the connecting column 42 are made to swing left and right on the flexible joint 3. The servo hydraulic cylinder also has the advantages of fast response speed, high reliability, large hydraulic stiffness, and can allow a larger open-loop gain factor as well as high precision and high response.

[0029] As an optional implementation, in one embodiment of the invention, see Figure 1 As shown, the fixing component 2 is a flange inverted cone structure, the top end of the flange inverted cone is connected to the cylinder body 1, and the bottom end of the flange inverted cone is connected to the flexible joint 3. The flange inverted cone has higher structural strength and rigidity, and can be used in high pressure and high temperature occasions. It can evenly disperse stress, reduce the risk of local deformation, ensure the stability of the overall structure, enhance sealing performance and optimize stress distribution, and avoid structural failure due to stress concentration.

[0030] An embodiment of the present invention also provides a swing test system for a flexible joint, including the aforementioned swing test device for a flexible joint, wherein the swing test device for a flexible joint includes: a cylinder body 1, a fixed component 2, a swing component 4 and a drive component 5, wherein the fixed component 2 is arranged on the cylinder body 1, and the bottom end of the fixed component 2 is connected to the flexible joint 3 arranged above the cylinder body 1, the swing component 4 is arranged above the cylinder body 1, and the bottom of the swing component 4 is connected to the flexible joint 3, and a closed cavity is formed between the swing component 4 and the flexible joint 3, the fixed component 2 and the cylinder body 1, and the drive component 5 is arranged on one side of the cylinder body 1 and connected to the swing component 4, for driving the swing component 4 to swing on the flexible joint 3.

[0031] An embodiment of the present invention provides a swing test system for a flexible joint. The swing test device of the flexible joint includes a cylinder, a fixing assembly, a swing assembly, and a driving assembly. The fixing assembly is disposed on the cylinder, and the bottom end of the fixing assembly is connected to the flexible joint disposed above the cylinder. The fixing assembly is used to fix the flexible joint. The swing assembly is disposed above the cylinder, and the bottom end of the swing assembly is connected to the flexible joint. A closed cavity is formed between the swing assembly, the flexible joint, the fixing assembly, and the cylinder. The driving assembly is disposed on one side of the cylinder and connected to the swing assembly, and is used to drive the swing assembly to swing on the flexible joint. A high-pressure test environment is created by pressurizing a medium in the closed cavity formed between the swing assembly, the flexible joint, the fixing assembly, and the cylinder. Under high-pressure conditions, a push-pull force is applied to the swing assembly by the driving assembly, causing the swing assembly to swing on the flexible joint. The stability, load-bearing capacity, swing performance, and static zero length of the flexible joint are tested. The high-pressure environment can be simulated at any time to test the stability, load-bearing capacity, and swing performance of the flexible joint, thereby ensuring test accuracy and reducing test difficulty and cost.

[0032] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0033] It should be noted that, in the present invention, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0034] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is to be construed in the widest possible manner consistent with the principles and novel features of the present invention.

Claims

1. A swing test device for a flexible joint, characterized in that: include: Cylinder (1); A fixing assembly (2), the fixing assembly (2) being arranged on the cylinder body (1), and the bottom end of the fixing assembly (2) being connected to a flexible joint (3) arranged above the cylinder body (1); A swing assembly (4), the swing assembly (4) being arranged above the cylinder (1), the bottom of the swing assembly (4) being connected to the flexible joint (3), and a closed cavity being formed between the swing assembly (4), the flexible joint (3), the fixed assembly (2), and the cylinder (1); A driving assembly (5) is provided on one side of the cylinder body (1) and is connected to the swing assembly (4), and is used to drive the swing assembly (4) to swing on the flexible joint (3).

2. The swing test device for a flexible joint according to claim 1, characterized in that: The swing assembly (4) comprises: A connecting shell (41), the connecting shell (41) being arranged above the cylinder body (1) in a vertical direction, and the bottom end of the connecting shell (41) being connected to the flexible joint (3); a connecting column (42), the connecting column (42) being arranged above the connecting shell (41) in a vertical direction and connected to the top end of the connecting shell (41); A push-pull beam (43) is provided at the top of the connecting column (42) in the horizontal direction. One side of the push-pull beam (43) is connected to the driving assembly (5). The driving assembly (5) drives the push-pull beam (43), the connecting column (42), and the connecting shell (41) to swing on the flexible joint (3).

3. The swing test device for a flexible joint according to claim 2, characterized in that: The swing assembly (4) further comprises: A partition (44) is provided between the connecting shell (41) and the connecting column (42) in a horizontal direction, and the partition (44) forms a partition structure between the connecting shell (41) and the connecting column (42).

4. The swing test device for a flexible joint according to claim 3, characterized in that: The thickness of the partition plate (44) is smaller than the thickness of the connecting shell (41) and the cylinder body (1).

5. The swing test device for a flexible joint according to claim 2, characterized in that: The connecting column (42) is a cone structure with a hollow center.

6. The swing test device for a flexible joint according to claim 2, characterized in that: The push-pull beam (43) is a hollow inverted trapezoidal structure, and the side of the push-pull beam (43) connected to the drive assembly (5) extends toward the outside of the cylinder body (1) to increase the swing arm.

7. The swing test device for a flexible joint according to claim 2, characterized in that: Also includes: A fixing lug (6) is provided on one side of the cylinder body (1) and is connected to the fixing assembly (2). The fixing lug (6) is also connected to the bottom end of the driving assembly (5) and is used to fix the driving assembly (5).

8. The swing test device for a flexible joint according to claim 7, characterized in that: The driving component (5) is a servo hydraulic cylinder, the top end of which is connected to the push-pull beam (43), and the bottom end of which is connected to the fixed lug (6). The servo hydraulic cylinder is telescopically extended along its length to push and pull the push-pull beam (43).

9. The swing test device for a flexible joint according to claim 1, characterized in that: The fixing assembly (2) is a flange inverted cone structure, the top end of the flange inverted cone is connected to the cylinder body (1), and the bottom end of the flange inverted cone is connected to the flexible joint (3).

10. A swing test system for a flexible joint, characterized in that: A swing test device comprising the flexible joint according to any one of claims 1 to 9.

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