A stage separation test system simulating weightlessness in vertical direction

Abstract

The utility model provides a kind of simulation vertical direction weightlessness state's interstage separation test system, comprising: product system, suspension system and buffer recovery system;Product system includes second rocket substage mass trimmer, interstage separation mechanism and first rocket substage mass trimmer;First rocket substage mass trimmer includes interstage section;Second rocket substage mass trimmer and interstage section are placed vertically;Interstage separation mechanism is set between second rocket substage mass trimmer and interstage section;Suspension system includes at least one fixedly arranged fixed pulley and rope;Fixed pulley is set above second rocket substage mass trimmer;Buffer recovery system includes counterweight;The upper end of second rocket substage mass trimmer is connected to one end of rope, and the other end of rope is connected with counterweight by passing through fixed pulley and being suspendedly arranged.The test system can better simulate the weightlessness state after rocket substage separation in vertical direction.

Description

Technical Field

[0001] This utility model relates to the field of ground-based interstage separation tests for launch vehicles, specifically to an interstage separation test system that simulates a state of weightlessness in the vertical direction. Background Technology

[0002] To verify the performance and control timing of the new interstage unlocking and separation device for launch vehicles on the ground, interstage separation tests need to be conducted. Existing ground-based interstage separation tests typically employ two methods: the first involves lifting the second-stage boundary components and the interstage section assembly, and after the unlocking device is activated, using the weight of the interstage section to achieve separation; the second involves laterally lifting the second-stage mass trim components and the first-stage mass trim components separately through two or more lifting points. During separation, the two components can slide opposite each other along an upper rail, and after separation, the product is safely decelerated and recovered via a deceleration mechanism on the suspension point rail.

[0003] The first method can only assess the performance of the interstage unlocking device, but cannot simulate the weightlessness in the separation direction, nor can it assess the interstage separation mechanism. The second method, while capable of simulating weightlessness in the horizontal separation direction, requires mass balancing of both the second and first stages, and necessitates multi-point suspension in the lateral direction. This restricts the movement of the module specimens (limiting axial rotational freedom), making it difficult to accurately simulate the dynamic separation process in three-dimensional space. Furthermore, the design of the lateral guide rails and deceleration recovery mechanism is complex and costly.

[0004] To better realize the weightlessness state of interstage separation, it is particularly important to design an interstage separation test system that simulates the weightlessness state in the vertical direction. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an interstage separation test system that simulates a state of weightlessness in the vertical direction.

[0006] This utility model provides an interstage separation test system for simulating vertical weightlessness, comprising: a product system, a suspension system, and a buffer recovery system; the product system includes a second rocket stage mass trim component, an interstage separation mechanism, and a first rocket stage mass trim component; the first rocket stage mass trim component includes an interstage section; the second rocket stage mass trim component and the interstage section are placed vertically, with the lower end of the second rocket stage mass trim component connected to the upper end of the interstage section; the interstage separation mechanism is disposed between the second rocket stage mass trim component and the interstage section; the suspension system includes at least one fixed pulley and a rope; the fixed pulley... The wheel is positioned above the second rocket stage mass trim component; the buffer recovery system includes a counterweight; one end of the rope is connected to the upper end of the second rocket stage mass trim component, and the other end of the rope passes around the fixed pulley and connects to the suspended counterweight; during the test, the interstage separation mechanism applies an upward force to the second rocket stage mass trim component and an opposite force to the interstage section, causing the second rocket stage mass trim component and the interstage section to separate. The second rocket stage mass trim component moves upward, and the counterweight moves downward synchronously to simulate the separation of the second rocket stage mass trim component and the interstage section in a weightless state.

[0007] According to one embodiment of the present invention, the product system further includes a lifting device; the lifting device is fixedly disposed on the upper end of the second rocket stage mass trimming component, and one end of the rope is connected to the upper end of the second rocket stage mass trimming component through the lifting device.

[0008] According to one embodiment of the present invention, the mass of the counterweight is equal to the sum of the mass of the second rocket stage mass balancing component and the mass of the lifting device.

[0009] According to one embodiment of the present invention, a plurality of lifting points are uniformly arranged at the upper end of the second rocket substage mass trim component along its circumferential direction; the lifting device is fixedly connected to the second rocket substage mass trim component through the plurality of lifting points.

[0010] According to one embodiment of the present invention, the suspension system includes two fixed pulleys arranged side by side; the other end of the rope passes over the top of the two fixed pulleys in sequence and is connected to the counterweight.

[0011] According to one embodiment of the present invention, the product system further includes an inter-stage unlocking device; the inter-stage unlocking device is disposed at the connection between the second rocket sub-stage mass trim component and the inter-stage section; the inter-stage unlocking device is used to fix or unlock the connection between the second rocket sub-stage mass trim component and the inter-stage section.

[0012] According to one embodiment of the present invention, the buffer recovery system further includes a buffer component; the buffer component is placed below the counterweight and is used to buffer the counterweight.

[0013] According to one embodiment of the present invention, the inter-level unlocking device is a point-type unlocking device.

[0014] According to one embodiment of the present invention, the suspension system further includes a suspension steel frame; the fixed pulley is fixedly disposed on the suspension steel frame.

[0015] According to one embodiment of the present invention, the rope is a steel wire rope.

[0016] The interstage separation test system for simulating vertical weightlessness according to this utility model can better simulate the weightlessness state after rocket stage separation in the vertical direction and achieve safe recovery of trim components.

[0017] It should be understood that the above general description and the following specific embodiments are merely exemplary and illustrative, and do not limit the scope of the present invention. Attached Figure Description

[0018] The accompanying drawings are part of the specification of this utility model and illustrate exemplary embodiments of the utility model. The drawings, together with the description in the specification, are used to illustrate the principles of the utility model.

[0019] Figure 1 This is a schematic diagram of the interstage separation test system for simulating vertical weightlessness according to an embodiment of the present invention before testing; Figure 2 This is a schematic diagram of the separation process of the interstage separation test system simulating vertical weightlessness according to another embodiment of the present invention. Figure 3 This is a schematic diagram of a buffer component according to an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures: 1-Second rocket stage mass balancing component; 2-Interstage unlocking device; 3-Interstage section; 4-Fixed pulley; 5-Rope; 6-Counterweight; 7-Lifting device; 8-Buffer assembly. Detailed Implementation

[0021] The features and exemplary embodiments of various aspects of this utility model will be described in detail below. To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this utility model and to exemplarily illustrate the principles of this utility model, and are not configured to limit this utility model. In addition, the structural components in the drawings are not necessarily drawn to scale. For example, the dimensions of some structural components or regions in the drawings may be enlarged for other structural components or regions to aid in the understanding of the embodiments of this utility model.

[0022] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the embodiments of this utility model. In the description of this utility model, it should be noted that, unless otherwise stated, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] Furthermore, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a structure or component that includes a list of elements includes not only those elements but also other structural elements that are not expressly listed or inherent to the structure or component. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the article or apparatus that includes the element.

[0024] Spatial relation terms such as "below," "under," "under," "low," "above," "on," and "high" are used for descriptive convenience to explain the positioning of one element relative to a second element, indicating that these terms are intended to cover different orientations of the device, in addition to those different from those shown in the figure. Furthermore, phrases such as "one element on / below another element" can indicate that two elements are in direct contact, or that there are other elements between the two elements. In addition, terms such as "first" and "second" are also used to describe individual elements, areas, parts, etc., without specifically indicating order or sequence, and should not be considered restrictive. Similar terms are used throughout the description to represent similar elements.

[0025] In the following description of this utility model, the terms "rocket," "launch vehicle," "spacecraft," "space launch vehicle," or "missile" may be used in certain scenarios for ease of description only, and their connotations are not limited to the specific terms used. Generally, the rockets of this utility model include space launch vehicles used to carry satellites, spacecraft, or other probes, as well as various missiles, rockets, and other weapons used to carry payloads, and similar products capable of sending payloads into the air. Those skilled in the art, when interpreting the above specific terms, should not limit the rocket to only one of launch vehicles or missiles based on the specific terms used in the description, thereby narrowing the scope of protection of this utility model.

[0026] For those skilled in the art, this invention can be implemented without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples.

[0027] Figure 1 This is a schematic diagram of the interstage separation test system for simulating vertical weightlessness according to an embodiment of the present invention before testing; Figure 2 This is a schematic diagram of the separation process of the interstage separation test system simulating vertical weightlessness according to another embodiment of the present invention. Figure 3 This is a schematic diagram of a buffer component according to an embodiment of the present invention.

[0028] like Figure 1 As shown, this utility model provides an interstage separation test system simulating vertical weightlessness, comprising: a product system, a suspension system, and a buffer recovery system. The product system includes a second rocket stage mass trimmer 1, an interstage separation mechanism, and a first rocket stage mass trimmer. The first rocket stage mass trimmer includes an interstage section 3. The second rocket stage mass trimmer 1 and the interstage section 3 are placed vertically, with the lower end of the second rocket stage mass trimmer 1 connected to the upper end of the interstage section 3. The interstage separation mechanism is located between the second rocket stage mass trimmer 1 and the interstage section 3. The suspension system includes at least one fixed pulley 4 and a rope 5. The fixed pulley 4 is positioned above the second rocket stage mass trimmer 1. The buffer recovery system includes a counterweight 6. One end of the rope 5 is connected to the upper end of the second rocket stage mass trimmer 1, and the other end of the rope 5 passes over the fixed pulley 4 and connects to the suspended counterweight 6. During the test, the interstage separation mechanism applies an upward force to the second rocket stage mass trimmer 1 and an opposite force to the interstage section 3, causing the second rocket stage mass trimmer 1 and the interstage section 3 to separate. The second rocket stage mass trimmer 1 moves upward, and the counterweight 6 moves downward synchronously to simulate the separation of the second rocket stage mass trimmer 1 and the interstage section 3 in a weightless state.

[0029] In this embodiment, in the initial state, the interstage section 3 and the second rocket stage mass trimmer 1 are placed vertically on the ground. One end of the rope 5 is connected to the upper end of the second rocket stage mass trimmer 1, and the other end of the rope 5 passes over the fixed pulley 4 and is connected to the counterweight 6. At this time, due to the tension of the interstage section 3 and the second rocket stage mass trimmer 1 on the counterweight 6 through the rope 5, the counterweight 6 is in a suspended and stationary state. Those skilled in the art will understand that, Figure 1 As shown in the state setting, the total weight of the components on the left side of the fixed pulley 4 (i.e., the total weight of the second rocket stage mass trimmer 1, the interstage separation mechanism and the interstage section 3) is greater than the weight of the components on the right side of the fixed pulley 4 (i.e., the weight of the counterweight 6).

[0030] like Figure 2 As shown, during the ground-based interstage separation test, the interstage separation mechanism imparts an initial upward velocity to the second rocket stage mass trim component 1. The second rocket stage mass trim component 1 moves upward, while the counterweight 6 moves downward simultaneously, resulting in a state of weightlessness for the second rocket stage mass trim component 1. This test system, through the fixed pulley 4 and the counterweight 6, simulates the weightlessness of the second rocket stage mass trim component 1 in the vertical direction.

[0031] Through the above experiments, the test system can simulate the weightlessness state after rocket stage separation in the vertical direction. Compared with the lateral suspension method, this test system can reduce the restriction on the degrees of freedom (e.g., rotational degrees of freedom) of the second rocket stage mass trim component 1 by the suspension, better simulate the weightlessness state of the first rocket stage trim component 1, and better conduct ground testing of the interstage separation mechanism and technology. This test system can also assess the safety of rocket stage (e.g., second stage) engine separation and whether the separated energy can achieve the set separation speed of the rocket stage. Furthermore, after the second rocket stage mass trim component 1 and the interstage section 3 separate, the second rocket stage mass trim component 1 can maintain a vertical state due to the pull of the counterweight 6 through the rope 5. After the counterweight 6 touches the ground, since the counterweight 6 no longer pulls on the second rocket stage mass trim component 1 through the rope 5, the second rocket stage mass trim component 1 gradually decelerates under gravity until its speed reaches 0, achieving safe recovery of the second rocket stage mass trim component 1. This experimental system is simple, has low setup costs, can save on experimental expenses, can be reused for experiments, and is highly safe.

[0032] For example, the second rocket stage mass trimmer 1 can be a trimmer for either the second or third stage, and correspondingly, the interstage section 3 can be an interstage section between the second and first stages, or between the third and second stages, etc. For example, the first rocket stage mass trimmer can include only the interstage section, or it can include the interstage section and mass trimmers for other rocket stages. The second rocket stage mass trimmer 1 is for the second stage of the rocket, and the first rocket stage mass trimmer includes the interstage section and the first stage. For example, the rope 5 can be a steel wire rope.

[0033] For example, the fixed pulley 4 can be fixedly installed on a structure such as a ceiling (e.g., a heavy-duty ceiling), a reaction wall, or a suspended steel frame.

[0034] According to one embodiment of the present invention, in addition to the second rocket stage mass trimmer 1, the interstage separation mechanism, and the interstage section 3, the product system also includes a lifting device 7. The lifting device 7 is fixedly installed at the upper end of the second rocket stage mass trimmer 1, and one end of the rope 5 is connected to the upper end of the second rocket stage mass trimmer 1 through the lifting device 7.

[0035] According to one embodiment of the present invention, the mass of the counterweight 6 is equal to the sum of the mass of the second rocket stage mass balance component 1 and the mass of the lifting device 7.

[0036] In this embodiment, counterweight 6 is used to counteract the gravity of the second rocket stage mass trim component. During the interstage separation test on the ground, under ideal conditions, the second rocket stage mass trim component 1 moves upward at a constant speed, and counterweight 6 moves downward at a constant speed synchronously.

[0037] According to one embodiment of the present invention, a plurality of lifting points are evenly arranged along the circumferential direction at the upper end of the second rocket stage mass trimmer 1. The lifting device 7 is fixedly connected to the second rocket stage mass trimmer 1 through the plurality of lifting points.

[0038] like Figure 1 and 2 As shown, according to one embodiment of the present invention, the suspension system includes two fixed pulleys 4 arranged side by side. The other end of the rope 5 passes over the top of the two fixed pulleys 4 in sequence and is connected to the counterweight 6.

[0039] In this embodiment, the height and spacing of the two fixed pulleys 4, as well as the material of the rope 5, can be set according to the actual test conditions (e.g., the size of the second rocket stage mass trimmer 1).

[0040] According to one embodiment of the present invention, in addition to the second rocket stage mass trimmer 1, the interstage separation mechanism, and the interstage section 3, the product system also includes an interstage unlocking device 2. The interstage unlocking device 2 is disposed at the connection between the second rocket stage mass trimmer 1 and the interstage section 3, and is used to fix or unlock the connection between the second rocket stage mass trimmer 1 and the interstage section 3.

[0041] In this embodiment, during the interstage separation test on the ground, the interstage unlocking device 2 unlocks the connection between the second rocket stage mass trim component 1 and the interstage section 3. The interstage separation mechanism applies opposing forces to the second rocket stage mass trim component 1 and the interstage section 3, causing them to separate. The second rocket stage mass trim component 1 moves upward, and the counterweight 6 moves downward simultaneously. This system can simultaneously test the interstage separation mechanism and the interstage unlocking device 2.

[0042] According to one embodiment of the present invention, in addition to the counterweight 6, the buffer recovery system further includes a buffer assembly 8. The buffer assembly 8 is placed below the counterweight 6 and is used to buffer the counterweight 6.

[0043] In this embodiment, during the separation test, the counterweight 6 begins to decelerate after contacting the buffer assembly 8 located below it, until its speed reaches zero. During deceleration, the tension of the counterweight 6 on the second rocket stage mass trimmer 1 via the rope 5 gradually decreases, causing the second rocket stage mass trimmer 1 to gradually decelerate and eventually stop its vertical movement. At this point, the second rocket stage mass trimmer 1 (e.g., the second-stage engine) is a certain distance from the interstage section 3. Those skilled in the art will understand that this distance can be designed using the initial spacing between the counterweight 6 and the buffer assembly 8, as well as the buffer deceleration distance of the buffer assembly on the counterweight 6, to assess the performance of the separation of the second rocket stage mass trimmer 1 from the interstage section and the interstage unlocking device 2 while ensuring test safety. This test system can utilize the buffer assembly 8 to achieve the safe recovery of the test component (e.g., the second rocket stage mass trimmer 1) through the controllable deceleration and recovery of the counterweight 6.

[0044] like Figure 3 As shown, for example, the buffer component 8 can be made of honeycomb aluminum. After testing and verification before the experiment, honeycomb aluminum sheets of different types and thicknesses can be stacked to adapt to counterweight deceleration and recovery of different weights and speeds.

[0045] According to one embodiment of the present invention, the inter-level unlocking device 2 is a point-type unlocking device.

[0046] In this embodiment, multiple interstage unlocking devices 2 can be provided along the circumferential direction of the second rocket stage mass trimmer 1.

[0047] According to one embodiment of the present invention, in addition to the fixed pulley 4 and the rope 5, the suspension system also includes a suspension steel frame. The fixed pulley 4 is fixedly mounted on the suspension steel frame.

[0048] According to one embodiment of the present invention, the rope 5 is a steel wire rope.

[0049] For example, the specific steps for installing the test system and conducting ground-based interstage separation tests are as follows: S01: Install two fixed pulleys at appropriate height and spacing on the heavy-duty ceiling, reaction wall, or suspended steel frame, and lay out the ropes (e.g., steel wire rope). S02: On one side below the pulley ( Figure 1 and Figure 2 Install the interstage section 3, the second rocket stage mass trim 1 (e.g., the second stage mass trim 1), the interstage unlocking device, the interstage separation mechanism, and the lifting gear on the left side of the middle section, and connect the second rocket stage mass trim 1 with one end of the rope 5; S03: On the other side below the pulley ( Figure 1 and Figure 2 On the right side of the middle), place the buffer assembly and suspend the counterweight, connecting it to the other end of the rope 5 that passes over the fixed pulley 4; after the rope 5 is taut and strained, since the left and right sides are in a state of mass balance, the interstage separation surface is theoretically only subjected to the clamping force of the unlocking device (e.g., a point unlocking device), which is similar to the launch state. S04: The unlock and separation command is issued. The second rocket stage mass trimmer 1 is subjected to an upward separation force under the action of the interstage separation mechanism. Since it is in a trimmed state with the counterweight on the right, the second rocket stage mass trimmer 1 will leave the separation surface between it and the interstage section 3 with a certain acceleration. If the acceleration is less than 1g, the counterweight will move downward with the same magnitude of acceleration. S05: After the interstage separation mechanism has finished its power operation, without considering pulley friction, the second rocket stage mass balancing component 1 and the counterweight will move upward and downward at uniform speeds respectively due to the mass balancing state. S06: The counterweight contacts the buffer assembly below, and the buffer assembly plays its role in buffering the counterweight. The counterweight decelerates to zero at a controllable deceleration rate, while the second rocket stage mass trimmer 1 on the left decelerates to zero at a relatively stable deceleration rate. S07: During this process, real-time relevant data can be obtained through various types of sensors on the product and counterweight, thus achieving the testing objectives of the experiment.

[0050] In this embodiment, since the second rocket stage mass balancing component 1, the lifting device 7, and the counterweight are in a mass balancing state, they can be reset to the separation surface without much force, so that the system can be restored to the test state.

[0051] The above embodiments of this utility model can be combined with each other and have corresponding technical effects.

[0052] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A stage separation test system for simulating vertical weightlessness, characterized in that, include: Product system, suspension system, and buffer recovery system; The product system includes a second rocket stage mass trim component, an interstage separation mechanism, and a first rocket stage mass trim component; the first rocket stage mass trim component includes an interstage section; the second rocket stage mass trim component and the interstage section are placed vertically, with the lower end of the second rocket stage mass trim component connected to the upper end of the interstage section; the interstage separation mechanism is disposed between the second rocket stage mass trim component and the interstage section; The suspension system includes at least one fixed pulley and a rope; the fixed pulley is positioned above the second rocket stage mass trimmer; the buffer recovery system includes a counterweight; one end of the rope is connected to the upper end of the second rocket stage mass trimmer, and the other end of the rope passes around the fixed pulley and is connected to the suspended counterweight; During the test, the interstage separation mechanism applies an upward force to the second rocket stage mass trimmer and a downward force to the interstage section, causing the second rocket stage mass trimmer and the interstage section to separate. The second rocket stage mass trimmer moves upward, and the counterweight moves downward synchronously to simulate the separation of the second rocket stage mass trimmer and the interstage section under weightlessness.

2. The testing system according to claim 1, characterized in that, The product system also includes a lifting device; the lifting device is fixedly installed on the upper end of the second rocket stage mass trim component, and one end of the rope is connected to the upper end of the second rocket stage mass trim component through the lifting device.

3. The testing system according to claim 2, characterized in that, The mass of the counterweight is equal to the sum of the mass of the second rocket stage mass balancing component and the mass of the lifting device.

4. The testing system according to claim 2, characterized in that, The upper end of the second rocket stage mass trim component has multiple lifting points evenly arranged along its circumferential direction; the lifting device is fixedly connected to the second rocket stage mass trim component through the multiple lifting points.

5. The testing system according to claim 1, characterized in that, The suspension system includes two fixed pulleys arranged side by side; the other end of the rope passes over the top of the two fixed pulleys in sequence and is connected to the counterweight.

6. The testing system according to claim 1, characterized in that, The product system also includes an inter-stage unlocking device; the inter-stage unlocking device is disposed at the connection between the second rocket sub-stage mass trim component and the inter-stage section; the inter-stage unlocking device is used to fix or unlock the connection between the second rocket sub-stage mass trim component and the inter-stage section.

7. The testing system according to claim 1, characterized in that, The buffer recovery system further includes a buffer component; the buffer component is placed below the counterweight and is used to buffer the counterweight.

8. The testing system according to claim 6, characterized in that, The inter-level unlocking device is a point-type unlocking device.

9. The testing system according to claim 1, characterized in that, The suspension system also includes a suspension steel frame; the fixed pulley is fixedly mounted on the suspension steel frame.

10. The testing system according to claim 1, characterized in that, The rope is a steel wire rope.

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