Tensile test device for near-space environment simulation system

Abstract

The present invention discloses a tensile testing device for a near-space environment simulation system. A base is provided at the bottom of a test chamber, and at least two groups of outwardly protruding extension bases are provided on the base. The extension bases are distributed along the circumference of the base. A pulling mechanism is provided on each group of extension bases. The pulling mechanism includes a pulling cylinder, a cylinder shaft, a coupling mechanism, a shaft body, a guide component, and a clamping assembly connected in sequence. The shaft body passes through the side wall of the test chamber, the outer end of the shaft body is rotatably connected to the coupling mechanism, and the inner end is rotatably connected to the guide component. The rotation direction of the shaft body relative to the coupling mechanism and the rotation direction of the shaft body relative to the guide component are perpendicular in space. The guide component is supported in the test chamber by roller sliding. A sealing component is installed in the test chamber at the position where the shaft body passes. Beneficial effect: The tensile test of the product can be completed under the premise of ensuring the sealing performance of the test chamber.

Description

Technical Field

[0001] The present invention relates to a product stress tensile testing device, in particular to a tensile testing device for a near-space environment simulation system. Background Art

[0002] Near-space refers to the airspace 20 to 100 kilometers above Earth's surface. Research has shown that this airspace has extremely high application value. With the rapid development of aerospace and flight technology, more and more aircraft and related products are being sent into near-space environments.

[0003] To ensure the reliability of spacecraft and related products, various tests should be carried out in a simulated near-space environment before they are sent into near-space, including product tensile tests. However, since the near-space environment simulation test chamber has extremely strict sealing requirements for the test workspace, existing tensile testing equipment is difficult to meet the testing requirements. Summary of the Invention

[0004] In view of this, the present invention provides a tensile testing device for a near-space environment simulation system, which can complete the tensile test of the product while ensuring the sealing performance of the test box.

[0005] To achieve the above purpose, the technical solution of the present invention is as follows:

[0006] A tensile testing device for a near-space environment simulation system, the key of which is that it includes a test box, a base is provided at the bottom of the test box, and at least two groups of outwardly protruding extension bases are provided on the base, and each of the extension bases is distributed along the circumference of the base, and each group of the extension bases is provided with a pulling mechanism, and the pulling mechanism includes a pulling cylinder, a cylinder shaft, a coupling mechanism, a shaft body, a guide component and a clamping assembly connected in sequence, wherein the shaft body passes through the side wall of the test box, the outer end of the shaft body is rotatably connected to the coupling mechanism, and the inner end is rotatably connected to the guide component, the rotation direction of the shaft body relative to the coupling mechanism and the rotation direction of the shaft body relative to the guide component are perpendicular in space, and the guide component is supported in the test box by roller sliding; the test box is provided with a sealing component installed at the position where the shaft body passes through.

[0007] With the above structure, when the product is subjected to near-space environment testing inside the test chamber, the clamping components in all directions clamp the product, and then the pulling cylinder works to perform a tensile test on the product. During the tensile test, since the two ends of the shaft are installed on the coupling mechanism and the guide component in a mutually perpendicular rotation connection mode, combined with the sliding movement mode of the guide component itself, the straightness of the shaft movement can be guaranteed, thereby ensuring a reliable seal between the shaft and the sealing component, thereby completing the tensile test of the product while ensuring the sealing performance of the test chamber.

[0008] Preferably, the test box comprises an upper and lower working room connected by buckling, and the lower working room and the upper working room are enclosed to form a test workspace.

[0009] Preferably, a test tube is mounted on the sidewall of the lower working chamber, connecting the inner and outer sides thereof. The outer end of the test tube is provided with an annular end sleeve. The sealing component is an annular sheet structure that fits over the shaft and is secured to the outer side of the end sleeve by an annular pressing piece. The shaft extends through the test tube. This structure facilitates assembly and further enhances the sealing level.

[0010] Preferably, a guide seat is fixed to the inner bottom of the test chamber. The guide component is supported on the guide seat via roller rails. Upwardly extending side baffles are provided at each end of the guide seat. Ball bearings are mounted on both sides of the guide component, and the balls are supported by the corresponding side baffles. The clamping assembly is rotatably connected to the front end of the guide component. Mounting blocks are provided at each end of the coupling mechanism, and these mounting blocks are slidably mounted on the extended base via rail assemblies. These technical measures help ensure the linearity of the shaft movement and enhance the reliability of the tensile test.

[0011] Preferably, the number of the extension bases and the drawing mechanisms is four or eight groups.

[0012] Preferably, a heating wire is wound around the surface of the shaft. With the above structure, by heating the shaft, the shaft can be prevented from affecting the ambient temperature inside the test chamber, thereby ensuring the reliability and accuracy of the near-space environment simulation test.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] By using the tensile testing device for a near-space environment simulation system provided by the present invention, when a product is subjected to a near-space environment test inside a test chamber, the clamping components in all directions clamp the product, and then the pulling cylinder is operated to perform a tensile test on the product. During the tensile test, since the two ends of the shaft are installed on the coupling mechanism and the guide component in a mutually perpendicular rotational connection manner, combined with the sliding movement of the guide component itself, the straightness of the shaft movement can be guaranteed, thereby ensuring a reliable seal between the shaft and the sealing component, thereby achieving the completion of the product tensile test under the premise of ensuring the sealing performance of the test chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the near-space environment simulation system;

[0016] Figure 2 It is a structural diagram of a test box equipped with a tensile test device;

[0017] Figure 3 for Figure 2 Cross-sectional view of the test chamber;

[0018] Figure 4 for Figure 3 A partial enlarged view of point Ⅰ in the middle;

[0019] Figure 5 It is a structural diagram of the tensile test device;

[0020] Figure 6 This is a schematic diagram reflecting the layout of the winch unit above the upper studio. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0022] like Figure 1 As shown, a near-space environment simulation system, the system involves the following components: guide rail 1, frame 2, test box 3, hoist unit 5, temperature control unit 6, bracket 7, pulling mechanism 8. Figure 2 and 3 It can be seen that the test box 3 includes a lower working room 3a and an upper working room 3b covering the upper end of the lower working room 3a. The lower working room 3a and the upper working room 3b together form a test workspace.

[0023] Furthermore, a base 3c is provided at the bottom of the lower working room 3a, and at least two groups of outwardly protruding extension bases 3d are provided on the base 3c. In this embodiment, the number of extension bases 3d is four groups, and the four groups of extension bases 3d are distributed along the circumference of the base 3c. A pulling mechanism 8 is provided on each group of extension bases 3d, and the pulling mechanism 8 is a tensile testing device.

[0024] Combine Figure 3 and Figure 5 It can be seen that the drawing mechanism 8 includes a drawing cylinder 8a, a cylinder shaft 8a1, a coupling mechanism 8g, a shaft body 8b, a guide component 8d and a clamping assembly 8c connected in sequence from the outside to the inside, wherein the shaft body 8b passes through the side wall of the lower working chamber 3a, the outer end of the shaft body 8b is rotatably connected to the coupling mechanism 8g, and the inner end is rotatably connected to the guide component 8d, the rotation direction of the shaft body 8b relative to the coupling mechanism 8g and the rotation direction of the shaft body 8b relative to the guide component 8d are perpendicular in space, and the guide component 8d is slidably supported in the test box 3 by the roller 8e.

[0025] When the product is undergoing a near-space environment simulation test inside the test box 3, the clamping components 8c in four directions clamp the product, and then the pulling cylinder 8a works to perform a tensile test on the product, thereby realizing a stress tensile test on the product in the near-space environment.

[0026] Recombination Figure 4It can be seen that a sealing component 3f is installed on the side wall of the lower working chamber 3a at the position where the shaft 8b passes through. During the tensile test, since the two ends of the shaft 8b are installed on the coupling mechanism 8g and the guide component 8d in a mutually perpendicular rotational connection manner, and the guide component 8d itself is supported by the roller 8e, this design can make the movement of the shaft 8b have better straightness, ensuring a reliable seal between the shaft 8b and the sealing component 3f, thereby completing the tensile test of the product while ensuring the sealing performance of the test chamber.

[0027] To facilitate the assembly of the sealing component 3f and the shaft body 8b, a test tube 3e is installed on the side wall of the lower working room 3a to connect the inside and outside thereof. The outer end of the test tube 3e is provided with an end kit 3i with an annular structure. The sealing component 3f is an annular sheet structure. The sealing component 3f with an annular sheet structure is sleeved on the shaft body 8b and fixed to the outside of the end kit 3i by an annular pressing piece 3j. The shaft body 8b passes into the lower working room 3a through the test tube 3e.

[0028] Please refer to Figure 3 and 5 A guide seat 3g is fixed on the inner bottom of the lower working room 3a, and the guide component 8d is supported on the guide seat 3g through the roller 8e slide rail. Upward-extending side baffles 3h are provided at both ends of the guide seat 3g. Balls 8f are installed on both sides of the guide component 8d, and the ball 8f is rolled and supported on the corresponding side baffles 3h. The clamping assembly 8c is rotatably connected to the front end of the guide component 8d, and mounting blocks 8g1 are fixedly installed at both ends of the coupling mechanism 8g. The mounting block 8g1 is slidably installed on the extension base 3d through the slide rail assembly 8h. This design can further ensure the straightness of the movement of the shaft 8b, improve the reliability of the tensile test and the sealing of the test box.

[0029] A heating wire is wound around the surface of the shaft 8b. During the tensile test, the heating wire heats the shaft 8b, which can prevent the shaft 8b from affecting the ambient temperature inside the test box 3, thereby ensuring the reliability and accuracy of the near-space environment simulation test.

[0030] In this embodiment, the lower working room 3a and the upper working room 3b are both regular octagonal structures. The use of a test box with a regular octagonal structure can improve the convenience of circumferential arrangement of the drawing mechanism 8 in the lower working room 3a, and the design is more reasonable.

[0031] For example Figure 2 As shown, in order to ensure the sealing of the test workspace inside the lower studio 3a and the upper studio 3b, a sealing ring 3k is provided between the end faces of the upper studio 3b and the lower studio 3a. In order to facilitate the locking of the upper studio 3b to the upper end of the lower studio 3a, a locking tool 3m is provided between the sides of the upper studio 3b and the lower studio 3a.

[0032] In this embodiment, there are three guide rails 1, two of which are laid on both sides of the lower working room 3a, and the other is laid on the outside of the temperature control unit 6. The frame 2 extends upward and is slidably installed on the three guide rails 1. The winch unit 5 is fixed on the top of the frame 2. The winch unit 5 is used to lift the upper working room 3b. The bracket 7 is placed next to the lower working room 3a, and the bracket 7 is located in the sliding direction of the frame 2.

[0033] After the winch unit 5 lifts the upper studio 3b, it then moves along the guide rail 1 with the frame 2 toward the bracket 7 and places the upper studio 3b on the bracket 7. By doing so, the upper end of the lower studio 3a can be completely exposed, making it convenient to load and unload various types of products.

[0034] Please refer to Figure 6 In this embodiment, the hoist assembly 5 is equipped with four hoist ropes 5a. Each hoist rope 5a is vertically connected to the top of the upper working chamber 3b via a horizontal pulley 5b and a vertical pulley 5c. The vertical sections of the four hoist ropes 5a are symmetrically distributed across the top of the upper working chamber 3b. This design ensures symmetrical force distribution, ensuring both reliable and safe lifting and precise docking of the upper working chamber 3b with the upper end of the lower working chamber 3a.

[0035] For example Figure 1 and 2 As shown, the temperature control chamber inside the temperature control unit 6 is provided with an air outlet interface c and a return air interface d, and the upper working room 3b is provided with an air inlet interface a and a return air interface b. Hoses are connected between the air inlet interface a and the air outlet interface c, and between the return air interface b and the return air interface d. Through the two hoses, a circulating air path can be formed between the temperature control chamber of the temperature control unit 6 and the test workspace inside the test box 3. Arranging a circulating fan A on the circulating air path can make the air flow circulate between the temperature control unit 6 and the test box 3.

[0036] The temperature control unit 6 is equipped with a temperature control device, a humidifier and an ozone generator. The temperature control device can make the test box 3 simulate high and low temperature environments, the humidifier can make the test box 3 simulate different humidity environments, and the ozone generator can make the test box 3 simulate an ozone-containing environment.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention. Such changes fall within the scope of protection of the present invention.

Claims

1. A tensile testing device for a near-space environment simulation system, characterized by: The invention comprises a test box (3), wherein a base (3c) is provided at the bottom of the test box (3), and at least two groups of outwardly protruding extension bases (3d) are provided on the base (3c), and each of the extension bases (3d) is distributed along the circumference of the base (3c), and each group of the extension bases (3d) is provided with a drawing mechanism (8), and the drawing mechanism (8) comprises a drawing cylinder (8a), a cylinder shaft (8a1), a coupling mechanism (8g), a shaft body (8b), a guide component (8d) and a clamping assembly (8c) connected in sequence, wherein The shaft (8b) passes through the side wall of the test box (3), the outer end of the shaft (8b) is rotatably connected to the coupling mechanism (8g), and the inner end is rotatably connected to the guide component (8d), the rotation direction of the shaft (8b) relative to the coupling mechanism (8g) and the rotation direction of the shaft (8b) relative to the guide component (8d) are perpendicular in space, and the guide component (8d) is rollingly supported in the test box (3) by the roller (8e); a sealing component (3f) is installed in the test box (3) at a position corresponding to the position through which the shaft (8b) passes; The test box (3) includes a lower working room (3a) and an upper working room (3b) that is buckled on the upper end of the lower working room (3a); the lower working room (3a) and the upper working room (3b) are enclosed together to form a test workspace; a test tube (3e) is installed on the side wall of the lower working room (3a) to connect the inner and outer sides thereof; the outer end of the test tube (3e) is provided with an end kit (3i) with an annular structure; the sealing component (3f) is an annular sheet structure; the sealing component (3f) with an annular sheet structure is sleeved on the shaft (8b) and fixed to the outer side of the end kit (3i) by an annular pressing sheet (3j); the shaft (8b) passes through the test tube (3e) into the lower working room (3a); A guide seat (3g) is fixedly provided on the inner bottom of the lower working chamber (3a); the guide component (8d) is supported on the guide seat (3g) via a roller (8e) slide rail; side baffles (3h) extending upward are provided at both ends of the guide seat (3g); balls (8f) are installed on both sides of the guide component (8d); the balls (8f) are rollingly supported on the corresponding side baffles (3h); the clamping assembly (8c) is rotatably connected to the front end of the guide component (8d); mounting blocks (8g1) are fixedly installed at both ends of the coupling mechanism (8g); the mounting blocks (8g1) are slidably installed on the extension base (3d) via the slide rail assembly (8h); The lower working chamber (3a) and the upper working chamber (3b) both have regular octagonal structures.

2. The tensile testing device for a near-space environment simulation system according to claim 1, characterized in that: The number of the extension bases (3d) and the drawing mechanisms (8) is four or eight groups.

3. The tensile testing device for a near-space environment simulation system according to claim 1, characterized in that: A heating wire is wound around the surface of the shaft (8b).

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