Braided rope performance test structure and method thereof

Abstract

The invention particularly relates to a braided rope performance test structure and method, and the structure comprises an inflation block, a mounting block, a mounting piece, and a gland. The upper surface of the inflation block is provided with an inflation cavity, an air leakage notch and a mounting groove located between the inflation cavity and the air leakage notch. Ventilation notches are formed in the side walls of the two sides of the mounting groove, and the two ventilation notches communicate with the inflation cavity and the air leakage notch correspondingly; an inflation hole and an exhaust hole which are communicated with the inflation cavity are formed in the side wall of the inflation block; the mounting block is arranged in the mounting groove, the upper surface is provided with a test groove along the axial direction, the length of the test groove is not less than that of the ventilation notch, and the test groove is aligned with the ventilation notch; the two mounting pieces are detachably connected to the upper surface of the mounting block, the two ends of the braided rope are fixed to the two ends of the mounting block respectively and are flush with the upper surface of the inflation block, the braided rope is located in the test groove, and the upper portion of the braided rope protrudes out of the upper surface of the inflation block; and the gland is detachably connected to the upper surface of the inflatable block and is tightly pressed above the mounting piece and the braided rope.

Description

Technical Field

[0001] This application belongs to the technical field of braided rope performance testing, and specifically relates to a braided rope performance testing structure and method thereof. Background Art

[0002] The core concept of the thermal seal design of braided ropes is a spring plus high-temperature heat-insulating materials. The spring provides a resilient force to ensure good contact with the sealing surface and prevent hot air leakage, and the high-temperature heat-insulating materials block heat transfer.

[0003] The design form of the braided rope seal assembly is flexible and can well meet the sealing requirements of turbine engines and hypersonic engines. It is an important implementation form for the thermal seal requirements of future hypersonic aircraft.

[0004] The main problems of braided rope seals include two aspects: one is the compression performance of the braided rope, and the other is the airtight performance of the braided rope. How to evaluate the compression performance and airtight performance of the braided rope in a high-temperature environment is an urgent technical problem to be solved. In view of this, this application is proposed. Summary of the Invention

[0005] The purpose of this application is to provide a braided rope performance testing structure and method thereof, so as to accurately evaluate the compression performance and / or airtight performance of the braided rope in a high-temperature environment during ground tests.

[0006] The technical solution of this application is as follows:

[0007] On the one hand, a braided rope performance testing structure is provided, including an inflation block, a mounting block, a mounting plate, and a gland;

[0008] The upper surface of the inflation block has an inflation cavity, a leakage gap, and a mounting groove between the inflation cavity and the leakage gap; both side walls of the mounting groove have ventilation gaps, and the two ventilation gaps are respectively communicated with the inflation cavity and the leakage gap;

[0009] The side wall of the inflation block has an inflation hole and an exhaust hole communicated with the inflation cavity;

[0010] The mounting block is arranged in the mounting groove, and its upper surface has a test groove along its axis. The length of the test groove is not less than the length of the ventilation gap and is aligned with the ventilation gap;

[0011] A circumferential sealing ring and vertical sealing strips are arranged between the mounting block and the side wall of the mounting groove. Among them, the circumferential sealing ring surrounds the outer periphery of the mounting block. There are two groups of vertical sealing strips, which are distributed on both sides of the mounting block. And each group of vertical sealing strips has two, which are distributed at both ends of the mounting block. The ventilation gap is located between the two vertical sealing strips, and each vertical sealing strip is divided into two sections, which are distributed on the upper and lower sides of the circumferential sealing ring;

[0012] There are two mounting pieces, which are detachably connected to the upper surface of the mounting block. The two ends of the braided rope are respectively fixed to both ends of the mounting block, flush with the upper surface of the inflatable block. The braided rope is located in the test groove, and its upper part protrudes above the upper surface of the inflatable block.

[0013] The gland is detachably connected to the upper surface of the inflatable block and presses tightly above the mounting piece and the braided rope.

[0014] According to at least one embodiment of the present application, in the above-mentioned braided rope performance test structure, the inflatable block is rectangular, and the installation groove is runway-shaped;

[0015] The inflatable cavity and the air leakage notch are respectively distributed near the two side walls of the inflatable block;

[0016] The inflation hole is connected to an inflation pipe, the inflation pipe is communicated with a high-temperature gas source, and an inflation valve is arranged on the inflation pipe;

[0017] The exhaust hole is connected to an exhaust pipe, and an exhaust valve is arranged on the exhaust pipe;

[0018] There are two exhaust holes and their corresponding exhaust pipes, which are respectively located on the side walls at both ends of the exhaust pipe.

[0019] According to at least one embodiment of the present application, in the above-mentioned braided rope performance test structure, the circumferential sealing ring and the vertical sealing strip are installed in the sealing groove opened on the mounting block.

[0020] According to at least one embodiment of the present application, in the above-mentioned braided rope performance test structure, the mounting piece is connected to the upper surface of the mounting block by screws;

[0021] The fixing of the two ends of the braided rope by the mounting piece is specifically to press the two ends of the braided rope into the fixing grooves opened on the upper surfaces at both ends of the mounting block respectively.

[0022] According to at least one embodiment of the present application, in the above-mentioned braided rope performance test structure, the gland is connected to the upper surface of the inflatable block by screws;

[0023] A pressure gauge is arranged on the gland to monitor the pressure in the inflatable cavity.

[0024] According to at least one embodiment of the present application, in the above-mentioned braided rope performance test structure, a C-shaped sealing strip is arranged between the gland and the inflatable block and the mounting piece. The C-shaped sealing strip is arranged along the outer periphery of the inflatable cavity and covers the two mounting pieces, and encloses the part between the ventilation notch communicated with the inflatable cavity and the braided rope;

[0025] The C-shaped sealing strip can be installed in the sealing groove opened on the inflatable block and the mounting piece.

[0026] According to at least one embodiment of the present application, in the above-mentioned braided rope performance test structure, sealant is filled between the gland and the inflatable block and the mounting piece for sealing.

[0027] According to at least one embodiment of the present application, in the above-mentioned braided rope performance test structure, there are multiple test grooves on the upper surface of the mounting block and the corresponding braided ropes arranged side by side.

[0028] On the other hand, a method for testing the performance of a braided rope is provided, which is implemented based on the above-mentioned braided rope performance test structure, and includes:

[0029] Filling high-temperature gas into the inflation cavity to make the pressure in the inflation cavity reach the required pressure, observing the change of the pressure in the inflation cavity, and obtaining the airtightness of the braided rope.

[0030] According to at least one embodiment of the present application, in the above-mentioned method for testing the performance of a braided rope, a mounting block with test grooves of different depths is selected, high-temperature gas is filled into the inflation cavity to make the pressure in the inflation cavity reach the required pressure, observing the change of the pressure in the inflation cavity, and obtaining the airtightness of the braided rope under different pressing degrees. Description of the Drawings

[0031] Figure 1 is an overall schematic diagram of the braided rope performance test structure provided by the embodiment of the present application;

[0032] Figure 2 is a partial schematic diagram of the braided rope performance test structure provided by the embodiment of the present application;

[0033] Figure 3 is a schematic diagram of the mounting block being installed in the inflation block provided by the embodiment of the present application;

[0034] Wherein:

[0035] 1 - inflation block; 2 - mounting block; 3 - mounting piece; 4 - gland; 5 - inflation pipe; 6 - exhaust pipe; 7 - circumferential sealing ring; 8 - vertical sealing strip; 9 - C-shaped sealing strip; 10 - braided rope;

[0036] A - inflation cavity; B - air leakage notch.

[0037] For better illustrating this embodiment, some contents in the drawings are omitted, enlarged or reduced, and are only used for exemplary illustration and should not be construed as a limitation to the present application. Detailed Embodiments

[0038] To make the technical solutions of the present application and their advantages clearer, the technical solutions of the present application will be further described clearly and completely below with reference to the drawings. It can be understood that the specific embodiments described herein are only partial embodiments of the present application, which are only used to explain the present application and not to limit the present application. It should be noted that for the convenience of description, only the parts related to the present application are shown in the drawings, and other related parts can refer to the normal design.

[0039] In addition, unless otherwise defined, the technical terms or scientific terms used in the description of this application shall have the ordinary meanings understood by those of ordinary skill in the art to which this application pertains. The term "including" used in the description of this application indicates that the concept appearing before this term encompasses the concepts listed after this term and their equivalents, without excluding other related concepts.

[0040] In addition, the terms indicating directions used in the description of this application are only used to represent relative directions or positional relationships. When the absolute position of the object being described changes, its relative positional relationship may also change accordingly. It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed" and "connected" used in the description of this application should be understood in a broad sense. For example, "connected" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. Those skilled in the art can understand their specific meanings in this application according to the specific circumstances.

[0041] A performance test structure for a braided rope, as Figure 1-2 shown, includes an inflatable block 1, a mounting block 2, a mounting plate 3, and a gland 4.

[0042] The inflatable block 1 can be designed to be rectangular, with an inflatable chamber A, a leakage notch B, and a mounting groove located between the inflatable chamber A and the leakage notch B on its upper surface.

[0043] The inflatable chamber A and the leakage notch B are respectively distributed close to the two side walls of the inflatable block 1.

[0044] The mounting groove can be designed to be runway-shaped, with ventilation notches on both side walls, and the two ventilation notches are respectively communicated with the inflatable chamber A and the leakage notch B.

[0045] The side wall of the inflatable block 1 has an inflation hole communicated with the inflatable chamber A. The inflation hole is connected to an inflation pipe 5, and the inflation pipe 5 is communicated with a high-temperature gas source. An inflation valve can be provided on the inflation pipe 5 to control the introduction of high-temperature gas into the inflatable chamber A.

[0046] The side wall of the inflatable block 1 has an exhaust hole communicated with the inflatable chamber A. The exhaust hole is connected to an exhaust pipe 6, and an exhaust valve can be provided on the exhaust pipe 6 to control the discharge of high-temperature gas from the inflatable chamber A.

[0047] The exhaust hole and its corresponding exhaust pipe 6 can be designed to be two, and are respectively located on the two side walls at both ends of the exhaust pipe 6.

[0048] The mounting block 2 is arranged in the mounting groove, as Figure 3 shown, and has a test groove along its axis on its upper surface. The length of the test groove is not less than the length of the ventilation notch, and can be specifically designed to be equal to the length of the ventilation notch and aligned with the ventilation notch.

[0049] A circumferential sealing ring 7 and a vertical sealing strip 8 are arranged between the mounting block 2 and the side wall of the mounting groove. Among them, the circumferential sealing ring 7 surrounds the outer periphery of the mounting block 2. There are two groups of vertical sealing strips 8, which are distributed on both sides of the mounting block 2. And each group of vertical sealing strips 8 has two, which are distributed at both ends of the mounting block 2. The ventilation notch is between the two vertical sealing strips 8. And each vertical sealing strip 8 is divided into two sections, which are distributed on the upper and lower sides of the circumferential sealing ring 7, so as to ensure the airtightness between the mounting block 2 and the mounting groove, and avoid the high-temperature gas filled into the inflation cavity A from flowing out through the gap between the mounting block 2 and the mounting groove.

[0050] Sealing grooves for installing the circumferential sealing ring 7 and the vertical sealing strip 8 can be opened on the mounting block 2.

[0051] There are two mounting pieces 3, which are detachably connected to the upper surface of the mounting block 2. The two ends of the braided rope 10 are respectively fixed at both ends of the mounting block 2, flush with the upper surface of the inflation block 1. The braided rope 10 is located in the test groove, and its upper part protrudes above the upper surface of the inflation block 1.

[0052] The mounting piece 3 can be connected to the upper surface of the mounting block 2 by screws. For fixing the two ends of the braided rope 10, it can be specifically designed to press the two ends of the braided rope 10 into the fixing grooves opened on the upper surfaces at both ends of the mounting block 2. For the convenience of installation, clamping pieces can be arranged at both ends of the braided rope 10, and the two mounting pieces 3 press the clamping pieces at both ends of the braided rope 10 into the fixing grooves for fixation.

[0053] The gland 4 is detachably connected to the upper surface of the inflation block 1. Specifically, it can be connected to the upper surface of the inflation block 1 by screws and pressed on the upper sides of the mounting piece 3 and the braided rope 10.

[0054] A pressure gauge can be arranged on the gland 4 to monitor the pressure in the inflation cavity A.

[0055] In order to prevent the high-temperature gas filled into the inflation cavity A from leaking between the gland 4, the inflation block 1 and the mounting piece 3, a C-shaped sealing strip 9 can be arranged between the gland 4, the inflation block 1 and the mounting piece 3. The C-shaped sealing strip 9 is arranged along the outer periphery of the inflation cavity A and extends onto the two mounting pieces 3, covering the part between the ventilation notch communicating with the inflation cavity A and the braided rope 10. It can further fill sealant between the gland 4, the inflation block 1 and the mounting piece 3 for sealing.

[0056] Sealing grooves for installing the C-shaped sealing strip 9 can be opened on the inflation block 1 and the mounting piece 3.

[0057] For the performance test of the braided rope with the braided rope performance test structure disclosed in the above embodiments, the following method can be referred to:

[0058] Fill the inflation chamber A with high-temperature gas until the pressure inside the inflation chamber A reaches the required pressure, observe the change in the pressure inside the inflation chamber A, and obtain the airtightness of the braided rope 10.

[0059] When filling the inflation chamber A with high-temperature gas, the amount of high-temperature gas filled into the inflation chamber A through the inflation hole and the amount of high-temperature gas discharged from the inflation chamber A through the exhaust hole can be synergistically controlled to achieve precise regulation of the pressure inside the inflation chamber A. When the pressure inside the inflation chamber A is too high, a large amount of gas inside the inflation chamber A can be controlled to be discharged through the exhaust hole for emergency pressure relief to ensure the safety of the test.

[0060] In the braided rope performance test structure disclosed in the above embodiment, due to the sealing design, the high-temperature gas filled into the inflation chamber A can only be discharged along the ventilation gap communicating with the inflation chamber A, the part where the braided rope 10 is located, and the leakage gap B. If the airtight performance of the braided rope 10 is poor, the pressure inside the inflation chamber A will drop significantly in a short time. If the airtight performance of the braided rope 10 is good, the pressure inside the inflation chamber A will remain constant for a long time.

[0061] In the braided rope performance test structure disclosed in the above embodiment, multiple mounting blocks 2 can be designed, each having test grooves with different depths. By selecting mounting blocks 2 with test grooves of different depths, the protruding degree of the braided rope 10 above the upper surface of the inflation block 1 is different, and the pressing degree of the pressing cover 4 on the braided rope 10 is also different. In this way, the airtightness of the braided rope 10 under different pressing degrees can be evaluated, and the compression performance and airtight performance of the braided rope in a high-temperature environment can be obtained.

[0062] In addition, multiple test grooves can be arranged side by side on the upper surface of the mounting block 2, and multiple braided ropes 10 can be installed simultaneously to realize the setting of multiple braided ropes 10 and evaluate their compression performance and airtight performance in a high-temperature environment.

[0063] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings. Those skilled in the art should understand that the protection scope of the present application is obviously not limited to these specific embodiments. Without departing from the principle of the present application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present application.

Claims

1. A braided rope performance testing structure, characterized in that: It comprises an inflatable block (1), a mounting block (2), a mounting sheet (3), and a gland (4); The upper surface of the inflatable block (1) is provided with an inflatable cavity (A), an air leakage notch (B), and a mounting groove between the inflatable cavity (A) and the air leakage notch (B); the side walls of the mounting groove are provided with ventilation notches, and the two ventilation notches are respectively connected with the inflatable cavity (A) and the air leakage notch (B); The side wall of the inflatable block (1) has an inflating hole and an exhaust hole which are connected to the inflatable cavity (A); The mounting block (2) is arranged in the mounting groove, and has a test groove along its axial direction on its upper surface, the length of the test groove is not less than the length of the ventilation notch, and is aligned with the ventilation notch; A circumferential sealing ring (7) and a vertical sealing strip (8) are provided between the mounting block (2) and the side wall of the mounting groove, wherein the circumferential sealing ring (7) surrounds the outer circumference of the mounting block (2), and there are two groups of vertical sealing strips (8) distributed on both sides of the mounting block (2), and each group of vertical sealing strips (8) has two vertical sealing strips (8) distributed on both ends of the mounting block (2), the ventilation gap is located between the two vertical sealing strips (8), and each vertical sealing strip (8) is divided into two sections, which are distributed on the upper and lower sides of the circumferential sealing ring (7); There are two mounting plates (3) which are detachably connected to the upper surface of the mounting block (2), and the two ends of the braided rope (10) are respectively fixed to the two ends of the mounting block (2) and are flush with the upper surface of the inflatable block (1). The braided rope (10) is in the test groove, and its upper part protrudes from the upper surface of the inflatable block (1); The pressure cover (4) is detachably connected to the upper surface of the inflatable block (1) and is pressed tightly above the mounting plate (3) and the braided rope (10).

2. The braided rope performance testing structure according to claim 1, characterized in that: The inflatable block (1) is rectangular, and the mounting groove is in the shape of a racetrack; The inflation cavity (A) and the air leakage gap (B) are respectively distributed close to the side walls of the inflation block (1); The inflation hole is connected to an inflation pipe (5), the inflation pipe (5) is connected to a high-temperature gas source, and an inflation valve is provided on the inflation pipe (5); The exhaust hole is connected to an exhaust pipe (6), and an exhaust valve is arranged on the exhaust pipe (6); There are two exhaust holes and corresponding exhaust pipes (6), which are respectively located on the side walls at both ends of the exhaust pipe (6).

3. The braided rope performance testing structure according to claim 2, characterized in that: A sealing groove for installing the circumferential sealing ring (7) and the vertical sealing strip (8) is provided on the installation block (2).

4. The braided rope performance testing structure according to claim 3, characterized in that: The mounting plate (3) is connected to the upper surface of the mounting block (2) by means of screws; The mounting plate (3) fixes the two ends of the braided rope (10) by respectively pressing the two ends of the braided rope (10) into the fixing grooves provided on the upper surfaces of the two ends of the mounting block (2).

5. The braided rope performance testing structure according to claim 4, characterized in that: The gland (4) is connected to the upper surface of the inflatable block (1) by means of screws; A pressure gauge is provided on the gland (4) to monitor the pressure in the inflation cavity (A).

6. The braided rope performance testing structure according to claim 5, characterized in that: A C-shaped sealing strip (9) is arranged between the gland (4), the inflatable block (1) and the mounting plate (3); the C-shaped sealing strip (9) is arranged along the outer periphery of the inflatable cavity (A) and is placed on the two mounting plates (3) to enclose the portion between the ventilation notch communicating with the inflatable cavity (A) and the braided rope (10); The sealing groove for installing the C-shaped sealing strip (9) can be provided on the inflatable block (1) and the installation sheet (3).

7. The braided rope performance testing structure according to claim 6, characterized in that: Sealing glue is filled between the gland (4), the inflatable block (1) and the mounting plate (3) to achieve sealing.

8. The braided rope performance testing structure according to claim 7, characterized in that: A plurality of test grooves and corresponding braided ropes (10) are arranged side by side on the upper surface of the mounting block (2).

9. A braided rope performance testing method, implemented based on the braided rope performance testing structure of claim 8, characterized in that: include: High-temperature gas is charged into the inflation chamber (A) to make the pressure in the inflation chamber (A) reach a required pressure, and the change of the pressure in the inflation chamber (A) is observed to obtain the air tightness of the braided rope (10).

10. The braided rope performance testing method according to claim 9, characterized in that: Select mounting blocks (2) with test grooves of different depths, fill the inflation chamber (A) with high-temperature gas, make the pressure in the inflation chamber (A) reach the required pressure, observe the change of the pressure in the inflation chamber (A), and obtain the air tightness of the braided rope (10) under different compression degrees.

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