A ground test bench capable of repeatedly simulating the high-overload separation of rocket fairings

Abstract

The present invention discloses a ground test bench capable of repeatedly simulating the high overload separation of a rocket fairing, comprising a base, a column, a plurality of linear guides, a disc support and a driving mechanism; the column is vertically mounted on the base, and a limit plate is arranged at the top of the column; a plurality of linear guides are vertically fixedly mounted on the column along the length direction of the column; a support is also included, and the support is arranged on the vertical surface of the linear guide; the disc support passes through the column and is placed on the support; a plurality of linear guides are provided with sliding blocks cooperating therewith, and can slide along the length direction of the linear guide; a driving mechanism drives the disc support to move vertically upward. It can provide an initial velocity and a high overload environment for a fairing separation ground test, and improve the reliability of the fairing separation test; a cylinder and a pipeline are used to provide a power source for the fairing separation test, and the initial velocity and overload value of the whole fairing can be designed by simply adjusting the air source pressure, and the structure is simple and practical.

Description

Technical Field

[0001] The invention belongs to the technical field of aerospace rockets, and in particular relates to a ground test bench capable of repeatedly simulating high-overload separation of a rocket fairing. Background Art

[0002] The fairing is an important part of the launch vehicle. When the rocket flies to a certain altitude, the fairing must be separated and discarded in time to allow the payload on the vehicle to work normally and reduce the subsequent mass of the vehicle. Whether the fairing separation is successful directly affects the success or failure of the flight mission.

[0003] However, the separation of the rocket fairing is a complex and precise process, and the slightest error will result in a failure to separate. In order to reduce the risk of error in the separation of the rocket fairing, verify the rationality of the fairing separation design, and the feasibility and reliability of the fairing separation process, it is necessary to simulate the fairing separation process in the ground environment. However, during the actual flight of the rocket, the rocket has a large initial velocity and high overload when the fairing is separated. How to simulate the speed and overload environment of the launch vehicle when the fairing is actually separated is the key issue of the current fairing separation test. Summary of the invention

[0004] In view of the above problems, it is necessary to design a high-overload ground separation test bench, which can provide the initial speed and overload environment for the fairing. At the same time, the test bench can be reused many times. By adjusting the air source pressure and movement stroke, different initial speeds and overload values ​​can be designed to verify the reliability of fairing separation.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A ground test bench capable of repeatedly simulating the high-overload separation of a rocket fairing, comprising a base, a column, a plurality of linear guide rails, a disc support and a drive mechanism;

[0007] The column is vertically mounted on the base, and a limit plate is provided on the top of the column;

[0008] A plurality of linear guide rails are vertically fixedly installed on the column along the length direction of the column;

[0009] It also includes a support member, which is arranged on a vertical surface of the linear guide rail;

[0010] The disc support passes through the column and is placed on the support member;

[0011] Several linear guide rails are provided with matching sliders, and the sliders are connected to the disc support through a supporting back block and can slide along the length direction of the linear guide rails;

[0012] The driving mechanism drives the disc support to move vertically upward.

[0013] Preferably, it further includes a limit component and a positioning flat plate. The limit component is installed on the positioning flat plate, and the positioning flat plate is arranged on the column.

[0014] Preferably, there are two of the plurality of linear guide rails, which are arranged in parallel on one side of the column, and the positioning flat plate is arranged between the two linear guide rails.

[0015] Preferably, the limit component is a spring limit pin, which includes an outer frame, a spring and a pressing tongue. The spring and the pressing tongue are abutted and installed in the outer frame. When the spring is in its original state, a part of the pressing tongue extends out of the outer frame. The pressing tongue includes a horizontal plane and an inclined plane. During installation, the horizontal plane is parallel to the base, and the inclined plane faces the base. When the disc support passes through from one side of the inclined plane, the pressing tongue retracts to allow the disc support to pass through. When the disc support passes through from one side of the horizontal plane, the pressing tongue limits the disc support.

[0016] Preferably, the driving mechanism is a plurality of cylinders, and the cylinders are communicated with an external air source through pipelines.

[0017] Preferably, there are two of the plurality of cylinders, which are symmetrically arranged below the disc support, and the two cylinders are connected through pipelines.

[0018] Preferably, the base, the column and the disc support are all provided with lifting holes or lifting rings for lifting each component.

[0019] Preferably, an elastic member is bonded to the surface of the limit plate connecting one side of the column for buffering the impact of the disc support assembly on the limit plate.

[0020] Preferably, the base is a "field" structure welded by I-beams.

[0021] Preferably, it further includes a sensor, and the sensor is arranged on the disc support.

[0022] Generally speaking, the above technical solutions conceived by the present invention can achieve the following beneficial effects:

[0023] 1. It can provide an initial velocity and a high-overload environment for the fairing separation ground test, and improve the reliability of the fairing separation test;

[0024] 2. The spring limit pin adopted has a one-way passage restriction, only allowing the disc support to move upward, and can achieve a limiting effect when the disc support moves downward;

[0025] 3. The cylinder and pipeline are used to provide the power source for the fairing separation test. The initial velocity and overload value of the whole fairing can be designed by simply adjusting the air source pressure;

[0026] 4. The length of the guide rail used is greater than the maximum extension of the cylinder, ensuring the upward movement trajectory of the fairing;

[0027] 5. This test bench has a simple structure, reasonable design, strong practicality, and can be reused many times, effectively saving test costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of a ground test bench capable of repeatedly simulating high-overload separation of a rocket fairing provided in one embodiment of the present invention;

[0029] Figure 2 It is another structural schematic diagram of a ground test bench capable of repeatedly simulating high-overload separation of a rocket fairing provided in one embodiment of the present invention;

[0030] Figure 3 is a schematic diagram of a driving structure provided in an embodiment of the present invention;

[0031] Figure 4 It is a schematic structural diagram of a spring limiting pin provided in one embodiment of the present invention.

[0032] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0033] 1-base, 2-column, 3-disc support, 4-linear guide, 5-driving mechanism, 501-cylinder rod, 6-spring limit pin, 601-outer frame, 602-spring, 603-tongue pressure, 604-horizontal plane, 605-inclined plane, 7-support back block, 8-lifting ring, 9-limiting plate, 10-slider, 11-support, 12-positioning plate, 13-pipeline. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It 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. Therefore, it should not be construed as a limitation to the present invention; in addition, in the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0036] As Figures 1 to 3 shown, a ground test bench for repeatedly simulating the high-overload separation of a rocket fairing provided by the present invention includes a base, a column, a plurality of linear guide rails, a disc support and a driving mechanism. Among them, the base, the column, and the disc support are all provided with lifting holes or lifting rings for lifting each component. In this embodiment, they are all set as lifting rings, and the lifting rings are installed on each component through bolts and nuts.

[0037] The column is vertically installed in the center of the base welded by "field"-shaped I-beams and is fixedly connected by screws. A limiting plate is provided at the top of the column for limiting the upward movement of the disc support to the maximum displacement. An elastic member is adhesively bonded to the surface of one side of the column connected to the limiting plate for buffering the impact on the limiting plate when the disc support moves upward; a plurality of linear guide rails are vertically fixedly installed on the column along the length direction of the column. In this embodiment, there are 2 linear guide rails, which are respectively arranged in parallel on the two edges on one side of the column. The bottom surface of the guide rail of the linear guide rail is fitted and installed with the column by screws or welding to provide a track for the up and down movement of the disc support.

[0038] It further includes a support member, which can be a flat plate or a ring structure for supporting the disc support. In this embodiment, the support member is a support flat plate. The center of the support flat plate passes through the column and is fixedly installed on the column by screws. The support flat plate is parallel to the horizontal plane. The middle part of the disc support is a hollow structure and is placed on the support flat plate through the column.

[0039] Sliders matching with the linear guide rails are arranged in the linear guide rails. In this embodiment, each linear guide rail corresponds to a slider, and each slider is connected to the disc support through a support back block and can slide along the length direction of the linear guide rail. The support back block is a trapezoidal structure. The bottom of the support back block is connected to the disc support by screws, and the side is connected to the slider of the linear guide rail by screws.

[0040] The driving mechanism can be arranged below the disc support or above the disc support to drive the disc support to move vertically upward. In the present embodiment, the driving mechanism is a plurality of cylinders arranged below the disc support. Preferably, there are two cylinders symmetrically arranged below the disc support and vertically mounted on the base. The two cylinders are connected to an external air source via pipelines. After the pipelines are ventilated, the cylinder rods of the cylinders move upward, thereby pushing the disc support to move upward. At the same time, in order to measure the acceleration of the disc support during the test, an acceleration sensor can be installed on the disc support. In order to prevent the disc support from colliding with the cylinder during the falling process and damaging the disc support or the cylinder, a limit position assembly is also provided on the column, above the support member, such as Figure 4 As shown, in this embodiment, the limit assembly is a spring limit pin, which is welded on a positioning plate, and the positioning plate is fixed horizontally on a column between two linear guide rails by screws. The spring limit pin includes an outer frame, a spring and a pressure tongue, and the spring and the pressure tongue are installed in contact with each other in the outer frame. When the spring is in the original state, a part of the pressure tongue extends out of the outer frame, and the pressure tongue includes a horizontal surface and an inclined surface. When installed, the horizontal surface is parallel to the base, and the inclined surface faces the base. When the disc support passes from one side of the inclined surface, the disc support can just touch the inclined surface of the pressure tongue, so that the pressure tongue retracts to allow the disc support to pass. When the disc support passes from one side of the horizontal surface, that is, after rising, it is rebounded by the limit plate at the top of the column to move downward, and the disc support is just blocked by the horizontal surface of the extended part of the pressure tongue, and the pressure tongue cannot retract, thereby realizing the limitation of the disc support, and the disc support no longer descends, which can avoid the collision between the disc support and the cylinder rod extended by the cylinder, and play a role in protecting the disc support and the cylinder rod.

[0041] The installation steps of this separation test bench are: connect the column to the center of the base with screws, connect the linear guide rail to the column with screws, and then place the disc support above the middle support of the column, connect the support back block to the slider and the disc support with screws respectively, place the slider in the linear guide rail, install the spring limit pin on the column, and then vertically install the cylinder on the base, directly below the disc support, and ensure that it is in contact with the disc support, and finally connect the pipeline system to the air source and the cylinder.

[0042] The method for using the structural device of a repeatable high-overload ground separation test bench proposed in the present invention is as follows: the air source pressure is set according to the overload to be simulated. After the air source is turned on, the cylinder rod of the cylinder is pushed by the pressure to move the disc support upward until it rises to the top of the column assembly and reaches the maximum stroke. At this time, the disc support begins to move downward due to the reaction force given by the limit plate until it falls above the spring limit pin, thereby completing the entire movement.

[0043] The present invention is not limited to the above-mentioned embodiments. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A ground test bench capable of repeatedly simulating the high-overload separation of a rocket fairing, characterized in that: It includes a base, a column, several linear guide rails, a disc support and a driving mechanism; The column is vertically installed on the base, and a limit plate is provided at the top of the column; Several of the linear guide rails are vertically and fixedly installed on the column along the length direction of the column; It further includes a support member, and the support member is arranged in the vertical plane of the linear guide rail; The disc support passes through the column and is placed on the support member; Sliders are arranged in several of the linear guide rails and are matched with the linear guide rails. A plurality of the sliders are connected to the disc support through support back blocks and can slide along the length direction of the linear guide rails; The driving mechanism drives the disc support to move vertically upward; It further includes a limit component and a positioning flat plate. The limit component is installed on the positioning flat plate, and the positioning flat plate is arranged on the column; The limit component is a spring limit pin, which includes an outer frame, a spring and a pressing tongue. The spring and the pressing tongue are abutted and installed in the outer frame. When the spring is in its original state, a part of the pressing tongue extends out of the outer frame. The pressing tongue includes a horizontal plane and an inclined plane. During installation, the horizontal plane is parallel to the base, and the inclined plane faces the base. When the disc support passes through from one side of the inclined plane, the pressing tongue retracts to allow the disc support to pass through. When the disc support passes through from one side of the horizontal plane, the pressing tongue limits the disc support; 2. The ground test bench capable of repeatedly simulating high-overload separation of rocket fairing according to claim 1 is characterized in that: Several of the linear guide rails are two, and are arranged in parallel on one side of the column. The positioning flat plate is arranged between the two linear guide rails; 3. The ground test bench capable of repeatedly simulating high-overload separation of rocket fairing according to claim 1 is characterized in that: The driving mechanism is several cylinders, and the cylinders are communicated with an external air source through pipelines; 4. The ground test bench capable of repeatedly simulating high-overload separation of rocket fairing according to claim 3 is characterized in that: Several of the cylinders are two, and are symmetrically arranged below the disc support. The two cylinders are connected through pipelines; 5. The ground test bench capable of repeatedly simulating high-overload separation of rocket fairing according to claim 1 is characterized in that: Lifting holes or lifting rings are provided on the base, the column and the disc support for lifting each component; 6. The ground test bench capable of repeatedly simulating high-overload separation of rocket fairing according to claim 1 is characterized in that: An elastic member is bonded to the surface of the limit plate connecting one side of the column, for buffering the impact of the disc support assembly on the limit plate; 7. The ground test bench capable of repeatedly simulating high-overload separation of rocket fairing according to claim 1 is characterized in that: The base is a "field" structure welded by I-beams; 8. The ground test bench capable of repeatedly simulating high-overload separation of rocket fairing according to claim 1 is characterized in that: It further includes a sensor, and the sensor is arranged on the disc support.

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