Spatial pipeline low-temperature vibration test clamp

Abstract

The invention provides a low-temperature vibration test fixture for a space pipeline. The low-temperature vibration test fixture comprises a spherical base, a spherical base connecting oblong hole, a spherical base threaded hole, a spherical upper cover and spherical base connecting through hole, a spherical upper cover, a spherical pipeline, a trapezoidal base upper connecting panel oblong hole, a trapezoidal base and a trapezoidal base lower connecting panel oblong hole, the spherical pipeline is arranged in the spherical groove of the spherical base, and the spherical pipeline can rotate, pitch and yaw in the spherical groove of the spherical base so as to be in butt joint with a space pipeline test piece, and conversion of the test piece from the space angle to the orthogonal direction is achieved. The space pipeline vibration test fixture is adaptive to a vibration table mounting hole site, has a space angle adjusting function, is simple in structure, simple and convenient to mount and reusable, shortens the time of a vibration test part in a development test period, and saves development and production cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical environment testing, and particularly relates to a low-temperature vibration test fixture for a space pipeline. Background Art

[0002] As a pipeline of the pressurization and delivery system of a launch vehicle using liquid fuel as a propellant, it connects the fuel tank and the engine. Its spatial shape in the rocket body is complex and changeable, and there are various types of support boundaries. It undertakes the transportation of liquid fuel, the pressurization of the fuel tank and pre-cooling work, and bears the vibration excitation caused by the operation of the engine and aerodynamic noise, the temperature and internal pressure environment transmitted by the liquid fuel, and the static load generated by installation offset and linear expansion. The reliability of the pipeline under the mechanical environment is related to the reliability of the engine operation and even the reliability of the entire rocket.

[0003] The loading directions of the vibration test are usually along the three orthogonal directions of the coordinate system of the test article. Correspondingly, the mounting holes of the vibration table are convenient for the test article to be mounted along the three orthogonal directions. To meet the requirements of the use function, the interfaces of the pipeline system are not always along the coordinate axes of the launch vehicle. Generally, the space pipeline needs to be positioned along the three coordinate axes after two angle conversions. The design of the previous pipeline vibration test fixtures is generally divided into two ideas. One is to design a special fixture for the test article of each test, and the other is to design a fixture with a single angle adjustment function. The former is easy to install but cannot be reused; the latter can be reused but is time-consuming to install. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art, improve the installation convenience and versatility of the space pipeline vibration test fixture, and provide a low-temperature vibration test fixture for a space pipeline, which realizes the conversion of the space pipeline from the space angle to the orthogonal direction. The test pipeline with angles to all three orthogonal coordinate axes is fixed to the mounting interfaces distributed along the coordinate axes. The relative distances in three directions between the test pipeline and the vibration table are adjustable. The installation process is simple, the tooling fixture can be reused, and it has a certain versatility.

[0005] The space pipeline vibration test fixture of the present invention is adapted to the mounting holes of the vibration table, has a space angle adjustment function, is simple in structure, easy to install, can be reused, shortens the time of the vibration test part in the research and development test cycle, and saves the research and development production cost.

[0006] The present invention provides a low-temperature vibration test fixture for a space pipeline, which is composed of a spherical base, a long circular hole connecting the spherical base, a threaded hole on the spherical base, a through hole connecting the spherical upper cover and the spherical base, a spherical upper cover, a spherical pipeline, a long circular hole on the connecting panel on the upper trapezoidal base, a trapezoidal base, and a long circular hole on the connecting panel on the lower trapezoidal base.

[0007] The trapezoidal base is connected to the shaker through the oblong holes on the lower connecting surface of the trapezoidal base. Bolts pass through the oblong holes on the connecting surface of the spherical base and the oblong holes on the upper connecting surface of the trapezoidal base to fix the spherical base and the trapezoidal base. The spherical pipeline is placed in the spherical groove of the spherical base. One end of the spherical pipeline is connected to the liquid nitrogen filling system. Adjust the angle of the spherical pipeline so that the other end is connected to the space pipeline test piece. Bolts pass through the connection through holes of the spherical upper cover and the spherical base and are screwed into the threaded holes of the spherical base. The spherical upper cover and the spherical base clamp the spherical pipeline to realize the fixed installation of the space pipeline test piece.

[0008] The functions of the oblong holes on the lower connecting surface of the trapezoidal base, the oblong holes on the upper connecting surface of the trapezoidal base, and the oblong holes on the connecting surface of the spherical base are to realize the free adjustment of the space pipeline test piece in two orthogonal horizontal directions relative to the shaker. The spherical pipeline can rotate, pitch, and yaw in the spherical groove of the spherical base to dock with the space pipeline test piece, realizing the conversion of the test piece from the space angle to the orthogonal direction. The spherical upper cover is connected to the spherical base through the connection through holes of the spherical upper cover and the spherical base and the threaded holes of the spherical base, clamping the spherical pipeline, and realizing the fixed installation of the space pipeline test piece.

[0009] The beneficial effects of the present invention are as follows:

[0010] 1. The spherical contact surface of the present invention can be adjusted in pitch and yaw relative to the tooling base, reducing the installation process and improving the test efficiency;

[0011] 2. The tooling base of the present invention can be reused and is suitable for connecting pipeline interfaces of a series of sizes; it can reduce repeated design and lower the R & D and test costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention:

[0013] Figure 1 is a low-temperature vibration test fixture for a space pipeline according to an embodiment of the present invention.

[0014] Among them: 1 - spherical base, 2 is the oblong hole on the connecting surface of the spherical base, 3 is the threaded hole on the spherical base, 4 is the connection through hole between the spherical upper cover and the spherical base, 5 is the spherical upper cover, 6 is the spherical pipeline, 7 is the oblong hole on the upper connecting panel of the trapezoidal base, 8 is the trapezoidal base, 9 is the oblong hole on the lower connecting panel of the trapezoidal base DETAILED DESCRIPTION OF THE INVENTION

[0015] To enable those skilled in the art to better understand the solution of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0016] This embodiment provides a low-temperature vibration test fixture for a space pipeline, and its composition schematic diagram is as Figure 1 shown. The system is composed of a spherical base 1, a long circular hole for connecting the spherical base 2, a threaded hole of the spherical base 3, a through hole for connecting the spherical upper cover and the spherical base 4, a spherical upper cover 5, a spherical pipeline 6, a long circular hole on the connecting panel of the trapezoidal base 7, a trapezoidal base 8, and a long circular hole on the lower connecting panel of the trapezoidal base 9.

[0017] The trapezoidal base 8 is connected to the vibration table through the long circular hole 9 on the lower connecting surface of the trapezoidal base. Bolts pass through the long circular hole 2 for connecting the spherical base and the long circular hole 7 on the upper connecting surface of the trapezoidal base to fix the spherical base 1 and the trapezoidal base 8. The spherical pipeline 6 is placed in the spherical groove of the spherical base 1. One end of the spherical pipeline 6 is connected to the liquid nitrogen filling system. The angle of the spherical pipeline 6 is adjusted so that the other end is connected to the space pipeline test piece. Bolts pass through the through hole 4 for connecting the spherical upper cover and the spherical base and are screwed into the threaded hole 3 of the spherical base. The spherical upper cover 5 and the spherical base 1 clamp the spherical pipeline 6 to realize the fixed installation of the space pipeline test piece.

[0018] The functions of the long circular hole 9 on the lower connecting surface of the trapezoidal base, the long circular hole 7 on the upper connecting surface of the trapezoidal base, and the long circular hole 2 for connecting the spherical base are to realize the free adjustment of the space pipeline test piece in two orthogonal horizontal directions relative to the vibration table. The spherical pipeline 6 can rotate, pitch, and yaw in the spherical groove of the spherical base 1 to dock with the space pipeline test piece, realizing the conversion of the test piece from the space angle to the orthogonal direction. The spherical upper cover 5 is connected to the spherical base 1 through the through hole 4 for connecting the spherical upper cover and the spherical base and the threaded hole 3 of the spherical base, and clamps the spherical pipeline 6 to realize the fixed installation of the space pipeline test piece.

[0019] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments are obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A space pipeline low temperature vibration test fixture, characterized in that: include: Spherical base, spherical base connecting oblong hole, spherical base threaded hole, spherical cover and spherical base connecting through hole, spherical cover, spherical pipeline, trapezoidal base upper connecting panel oblong hole, trapezoidal base, trapezoidal base lower connecting panel oblong hole; The spherical pipeline is placed in the spherical groove of the spherical base; the spherical upper cover and the spherical base clamp the spherical pipeline to achieve fixed installation of the space pipeline test piece.

2. A space pipeline low temperature vibration test fixture according to claim 1, characterized in that: One end of the spherical pipeline is connected to the liquid nitrogen filling system, the angle of the spherical pipeline is adjusted, and the other end is connected to the space pipeline test piece.

3. A space pipeline low temperature vibration test fixture according to claim 2, characterized in that: The spherical pipeline can perform three actions of rotation, pitch and yaw in the spherical groove of the spherical base to dock with the spatial pipeline test piece and realize the conversion of the test piece from a spatial angle to an orthogonal direction.

4. A space pipeline low temperature vibration test fixture according to claim 3, characterized in that: The trapezoidal base is connected to the vibration table through an oblong hole on the lower connecting surface of the trapezoidal base.

5. A space pipeline low temperature vibration test fixture according to claim 4, characterized in that: The functions of the oblong hole on the lower connecting surface of the trapezoidal base, the oblong hole on the upper connecting surface of the trapezoidal base and the oblong hole on the spherical base are to realize the free adjustment of the spatial pipeline test piece in two horizontal orthogonal directions relative to the vibration table.

6. A space pipeline low temperature vibration test fixture according to claim 1, characterized in that: The spherical upper cover is connected to the spherical base through the spherical upper cover and spherical base connecting through holes and the spherical base threaded holes to clamp the spherical pipeline.

7. A space pipeline low temperature vibration test fixture according to claim 1, characterized in that: The bolt passes through the connecting oblong hole of the spherical base and the connecting surface oblong hole of the trapezoidal base to fix the spherical base and the trapezoidal base.

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