CN-117284507-B - Pneumatic suspension test device for dynamic test of bearing and separating of weightless object

CN117284507BCN 117284507 BCN117284507 BCN 117284507BCN-117284507-B

Abstract

The invention discloses a pneumatic suspension test device for a weight loss object bearing and separating dynamic test, which mainly comprises a pneumatic suspension platform (1), a pneumatic suspension assembly (2), a ground fixing tool assembly (3), a bearing and separating assembly (4), a ground load loading assembly (5), an external detection assembly (6) and a pneumatic pin pulling unlocking assembly (7), wherein the tool mechanism can effectively simulate the dynamic environment of the object under the weightless environment and under the external load, provide a platform for carrying out the bearing and separating test for the object, monitor key parameters such as speed gesture, stress strain and the like, truly equivalent the dynamic effect of the object in a wind tunnel laboratory under the external load, greatly reduce the cost and improve the efficiency.

Inventors

ZHANG ZHEYUAN
TANG JIE
REN HAILIAO
PAN SICHEN
LI MAO
LIU TAO
KANG SHIPENG
ZHAO XUECHENG
JIANG TAO
ZOU HUAIWU
WANG LIYANG
ZHANG XIUKE

Assignees

上海宇航系统工程研究所

Dates

Publication Date: 20260508
Application Date: 20230922

Claims (6)

1. The pneumatic suspension test device for the weight-loss object bearing and separation dynamic test is characterized by comprising an air suspension platform (1), a pneumatic suspension assembly (2), a ground fixing tool assembly (3), a bearing and separation assembly (4), a ground load loading assembly (5), an external detection assembly (6) and a pneumatic pin pulling unlocking assembly (7); in the test, an object B is fixedly arranged on the ground fixing tool assembly (3), an object A is placed on the air suspension platform (1) through the pneumatic suspension assembly (2) and used for simulating a weightlessness environment, one end of the bearing separation assembly (4) is fixedly connected with the object B and provided with pre-pressure energy, and the other end of the bearing separation assembly is contacted with the object A, the object A and the object B are in locking connection through the pneumatic pin pulling unlocking assembly (7), the ground load loading assembly (5) applies loads in three directions to the object A, and the external detection assembly (6) is arranged outside the object A and the object B and is used for detecting speed postures and stress strain information of the object A and the object B; the pneumatic suspension assembly (2) comprises an air floatation pad (2-1), a connecting plate (2-2), an adjusting joint (2-3) and an adjusting spring (2-4), wherein the pneumatic suspension assembly (2) is in ventilation suspension on a marble platform (1-1) through the middle air floatation pad (2-1), and is connected with an object A through the adjusting joint (2-3), so that the gravity environment of the object A is eliminated, the bottom surface of the air floatation pad (2-1) is a plane and is provided with a plurality of air outlet small holes, the air floatation pad (2-1) is hollow and is ventilated at a flange vent hole of the air floatation pad (2-1) through an external air source, the ventilation pressure is calculated through the gravity of the object A so as to meet the air film requirement, and thus the gravity counteracting requirement is realized, the air floatation pad (2-1) is connected with the connecting plate (2-2) through 4 groups of adjusting springs, the connecting plate (2-2) is connected with the object A through the adjusting joint (2-3), and the whole flatness of the object A is realized through the adjusting joint (2-3), so that the leveling of the object A is ensured, and the air floatation assembly of the arbitrary number of the object A at the level at the moment is regulated according to the weight of the air floatation assembly (2) at any time; The bearing separation assembly (4) comprises a sleeve (4-1), a loop bar (4-2), separation springs (4-3) and separation springs (4-3), wherein the loop bar (4-2) is arranged on an object A, the separation springs (4-3) are arranged in the sleeve (4-1) and then are arranged on a fixed object B, and the sizes and the number of the sleeve (4-1), the loop bar (4-2) and the separation springs (4-3) are designed according to separation mechanisms on the object A, B, so that the strength of the bearing separation assembly is consistent with that of a real product; The ground load loading assembly (5) comprises a pulley (5-1), a steel cable (5-2), a spring wire (5-3) and a balancing weight (5-4), wherein the steel cable (5-2) penetrates through the pulley (5-1) to be connected with a load connection point on an object A, the pulley (5-1) is fixed with the ground fixing tool assembly (3), three-way applied load of the load connection point on the object A is achieved through the balancing weight (5-4), the length of the steel cable (5-2) is designed according to more than 10 times through the travel of an object A, B so as to meet the requirement of eliminating load errors caused by included angles, and the spring wire (5-3) is arranged on the steel cable (5-2) and is used for achieving load deviation influence caused by inertia in separation moment.
2. The pneumatic suspension test device for the weight-loss object bearing separation dynamics test according to claim 1, wherein the pneumatic suspension platform (1) comprises a plurality of marble platforms (1-1), a plurality of hydraulic supports (1-2) and a level meter (1-3), the marble platforms (1-1) are spliced into a shape meeting the placement requirement of an object a, the hydraulic supports (1-2) are used for realizing integral leveling, and the level meter (1-3) is used for measuring so as to ensure the flatness of the pneumatic suspension platform (1); The marble platform (1-1) is smooth in surface and free of pits, so that a travel air film of the pneumatic suspension assembly (2) is uniform when the bottom is blown, the advancing process is stable and free of friction influence, the hydraulic support (1-2) has enough supporting force to meet the gravity for bearing a plurality of marble platforms (1-1) and objects A, the level meter (1-3) is placed on the marble platform (1-1), and the level is measured in two directions, so that the flatness of the whole pneumatic suspension platform (1) is guaranteed.
3. The pneumatic suspension test device for the weightless object bearing and separation dynamics test according to claim 1 is characterized in that the ground fixing tool assembly (3) comprises a ground fixing support (3-1) and a 2-direction adjusting and mounting support (3-2), the ground fixing support (3-1) is a weight module obtained through load calculation, the balance load is achieved, the strength of the test process is guaranteed, the test device is reliably fixedly mounted on the ground, the 2-direction adjusting and mounting support (3-2) is fixedly connected with the ground fixing support (3-1), the installation of an object B and a load pulley is achieved, the horizontal and height direction positioning and connection of the object B and the load pulley are achieved through 2-direction adjustment, and the ground fixing tool assembly (3) is arranged at any position according to a field so as to meet the requirement of fixing the object B and meet the requirement of three-way mechanical load loading of the object A.
4. The pneumatic suspension test device for the weight-loss object bearing separation dynamic test according to claim 1, wherein the length of the steel cable (5-2) is L, the separation stroke is H, the tool assembly (3) is fixed on the ground in the separation process, L=10H can meet the requirements of arctan (H/L) =arctan (0.1) ≡5.71 degrees, the load deviation is Fsin (5.71 °) = 0.0995 F+≤10% F, the load application requirement is met, the spring wire (5-3) is arranged on the steel cable (5-2), the weight (5-4) does not bear the weight of the separation assembly (4) at the moment of separation due to gravity, and therefore the spring wire (5-3) is large enough to quickly respond to compensate for the load change caused by slow gravity response.
5. The pneumatic suspension test device for the weightless object bearing and separation dynamics test according to claim 1, wherein the external detection assembly (6) comprises a high-speed camera and a target (6-1) and a stress strain gauge and test system (6-2), wherein a visual target in the high-speed camera and the target (6-1) is arranged on an object B structural cylinder, the high-speed camera is fixed on the ground and opposite to the visual target, the speed in the separation process is measured, and the stress strain gauge in the stress strain gauge and test system (6-2) is adhered on an object B sleeve (4-1) and an object A sleeve rod (4-2) to realize the measurement of stress strain parameters in the separation process.
6. The pneumatic suspension test device for the weightless object bearing and separation dynamics test according to claim 1, wherein the pneumatic pin pulling unlocking assembly (7) comprises a ground lock hole device (7-1), a movable lock hook tool (7-2) and a pneumatic pin pulling device (7-3), the ground lock hole device (7-1) is installed on the ground fixing tool assembly (3), the movable lock hook tool (7-2) and the pneumatic pin pulling device (7-3) are fixedly connected into a whole and installed on a movable object A, initially, a column on the pneumatic pin pulling device (7-3) penetrates into a lock hole of the ground lock hole device (7-1) to achieve fixed connection of the object A and the object B, and the unlocking time can achieve shrinkage on the pneumatic pin pulling device (7-3) through ventilation of the pneumatic pin pulling device (7-3) to achieve unlocking.

Description

Pneumatic suspension test device for dynamic test of bearing and separating of weightless object Technical Field The invention relates to the technical field of design of space mechanisms, in particular to a pneumatic suspension test device for a weight loss object bearing and separating dynamic test. Background With the development of space science and technology, the number of spacecrafts at home and abroad is increasing, and the emitted orbit is also changed from a vacuum state of more than 100km to an adjacent space of 20-100 km. In this context, the environment that the spacecraft faces during launching and separation is not under the influence of vacuum but rather complex lean air, and the lean air acts between the spacecraft to generate load during separation. The design of a separation mechanism for separating between adjacent space spacecrafts of 20-100 km must take account of the effects of the separation mechanism and perform effective verification. At present, the main test method for researching the dynamic characteristics of the load-bearing separation of the weightless object in China is to carry out a separation test in a wind tunnel laboratory, and the method has high test cost and low verification efficiency, so that a new tooling mechanism with low cost and high efficiency is required to be designed so as to meet the dynamic effect of the separation of the object in the real equivalent wind tunnel laboratory under the external load in the weightless environment. Disclosure of Invention The invention aims to provide a pneumatic suspension test device for a weightless object bearing and separating dynamic test, which aims to solve the problems of high cost and low verification efficiency of the weightless object bearing and separating dynamic test in a traditional wind tunnel laboratory in the prior art. In order to solve the technical problems, the technical scheme of the invention is to provide a pneumatic suspension test device for a weight-loss object bearing and separating dynamic test, which comprises a pneumatic suspension platform 1, a pneumatic suspension assembly 2, a ground fixing tool assembly 3, a bearing and separating assembly 4, a ground load loading assembly 5, an external detection assembly 6 and a pneumatic pin pulling unlocking assembly 7; In the test, an object B is fixedly arranged on a ground fixing tool assembly 3, an object A is placed on an air suspension platform 1 through an air suspension assembly 2 and used for simulating a weightlessness environment, one end of a bearing separation assembly 4 is fixedly connected with the object B and provided with pre-pressure energy, the other end of the bearing separation assembly is in contact with the object A, the object A and the object B are in locking connection through an air pulling pin unlocking assembly 7, a ground load loading assembly 5 applies loads in three directions to the object A, and an external detection assembly 6 is arranged outside the object A and the object B and used for detecting speed posture and stress strain information of the object A and the object B. Further, the air suspension platform 1 comprises a plurality of marble Dan Pingtai-1, a plurality of hydraulic support columns 1-2 and a level meter 1-3, the marble platform 1-1 is spliced into a shape meeting the placing requirement of the object A, the whole leveling is realized through the hydraulic support columns 1-2, and the flatness of the air suspension platform 1 is ensured by measuring through the level meter 1-3; The marble platform 1-1 has smooth surface and no pit, so that a travel air film is uniform when the pneumatic suspension assembly 2 blows at the bottom, the advancing process is ensured to be stable and free from friction force influence, the hydraulic prop 1-2 has enough supporting force to meet the gravity for bearing a plurality of marbles Dan Pingtai-1 and objects A, the level meter 3 is arranged on the marble Dan Pingtai-1 and measures the level in two directions, and therefore the planeness of the whole pneumatic suspension platform 1 is ensured. The pneumatic suspension assembly 2 comprises an air cushion 2-1, a connecting plate 2-2, an adjusting joint 2-3 and an adjusting spring 2-4, wherein the air cushion 2 is ventilated and suspended on a marble platform 1-1 through the middle air cushion 2-1, and then is connected with an object A through the adjusting joint 2-3, so that the gravity environment of the object A is eliminated, the bottom surface of the air cushion 2-1 is a plane and is provided with a plurality of air outlet small holes, the air cushion 2-1 is hollow and is ventilated at a flange vent hole of the air cushion 2-1 through an external air source, the ventilation pressure is calculated through the gravity of the object A to meet the air film requirement, so that the gravity counteracting effect is realized, the air cushion 2-1 is connected with the connecting plate 2-2 through 4 groups of adjusting spr