A tension relief device

Abstract

The application discloses a tension force slow-release device, characterized in that the device comprises a tension force slow-release joint (1), a tension force slow-release column (2), a piston nut (3), a phase change block (4), a sleeve nut (5) and a sealing ring (6). The device utilizes the low melting point of the phase change block to realize the switching from a bearing state to an unloading state, and has the advantages of simple principle, high reliability, compact structure, light weight and low cost.

Description

Technical Field

[0001] This invention relates to a force-relieving device, and more particularly to a tension-relieving device. Background Technology

[0002] The connection and release of payloads and launch vehicles are widespread, such as between stages of multi-stage rockets, between satellites and launch vehicles, between satellites and spacecraft, between solar panels and spacecraft, and between deployable antennas and spacecraft. There are already modular stacked clamping and release device designs in China, such as CN202222057212.6. Such devices are generally equipped with clamping rods. When unlocking, the elastic potential energy of the clamping rods and stacking columns is released instantaneously, which can have a great impact on payloads such as satellites. This invention addresses this problem by developing a tension relief device. Summary of the Invention

[0003] The purpose of this invention is to provide a tension relief device that slowly releases the elastic potential energy in the clamping rod before unlocking, thereby reducing the unlocking impact of the stacked clamping release device.

[0004] A tension release device, characterized in that it includes a tension release connector, a tension release column, a piston nut, a phase change block, a sleeve nut, and a sealing ring; The tension relief connector is a cylindrical component with a semi-threaded countersunk hole at the bottom; The tension-relieving column is a columnar component with a stud at the top; The piston nut is a block-shaped part with a threaded hole at the bottom. The piston nut and the countersunk hole at the bottom of the tension relief connector are clearance fit. The phase change block is a ring-shaped component with a melting point between 40 and 200°C. The sleeve nut is a ring-shaped part with an external thread at the bottom and a through hole in the center. The inner wall of the through hole has an annular groove. The sealing ring is a sealing ring; The sealing ring is placed in the annular groove of the sleeve nut, with the sleeve nut at the bottom and the phase change block at the top, and is then placed on the tension relief column in sequence. The stud at the top of the tension relief column is screwed into the threaded hole of the piston nut. The piston nut and the phase change block are placed in the countersunk hole at the bottom of the tension relief connector, and the sleeve nut is screwed into the threaded hole at the bottom of the tension relief connector. When the phase change block is heated and melted, it can flow into the top of the piston nut through the gap between the tension relief connector and the piston nut; The tension release column and piston nut can be combined into a single part. The axial cross-section of the combined part is a "T" shaped structure. The top is provided with a cap-shaped protrusion that has the same function as the original piston nut, which is clearance-fitted with the countersunk hole of the tension release connector. The bottom is provided with a stud that has the same function as the original tension release column. The tension relief connector has a connection hole at the top, a stud at the bottom of the tension relief column, and a groove at the bottom of the sleeve nut for applying torque.

[0005] The advantages of this invention are: The tension relief device of the present invention has a simple working principle and high reliability. The tension-relieving device of the present invention is compact, lightweight, and low-cost. Attached Figure Description

[0006] Figure 1 An appearance diagram of a tension relief device; Figure 2 A cross-sectional view of a tension release device before tension release; Figure 3 A cross-sectional view of a tension release device after tension release. Detailed Implementation

[0007] like Figures 1-3 As shown, a tension relief device is characterized by comprising a tension relief connector 1, a tension relief column 2, a piston nut 3, a phase change block 4, a sleeve nut 5, and a sealing ring 6. The tension relief connector 1 is a cylindrical component with a semi-threaded countersunk hole at the bottom; The tension-relieving column 2 is a columnar component with a stud at the top; The piston nut 3 is a block-shaped part with a threaded hole at the bottom. The piston nut 3 and the countersunk hole at the bottom of the tension relief connector 1 are in clearance fit. The phase change block 4 is a ring-shaped component with a melting point between 40 and 200°C. The sleeve nut 5 is a ring-shaped part with an external thread at the bottom and a through hole in the center. The inner wall of the through hole has an annular groove. The sealing ring 6 is a sealing ring; The sealing ring 6 is placed in the annular groove of the sleeve nut 5, with the sleeve nut 5 at the bottom and the phase change block 4 at the top, and is sequentially fitted onto the tension relief column 2. The stud at the top of the tension relief column 2 is screwed into the threaded hole of the piston nut 3. The piston nut 3 and the phase change block 4 are placed into the countersunk hole at the bottom of the tension relief connector 1. The sleeve nut 5 is screwed into the threaded hole at the bottom of the tension relief connector 1. When the phase change block 4 is heated and melted, it can flow into the top of the piston nut 3 through the gap between the tension release connector 1 and the piston nut 3. The tension release column 2 and the piston nut 3 can be combined into a single part. The axial cross section of the combined part is a "T" shaped structure. The top is provided with a cap-shaped protrusion that has the same function as the original piston nut 3, which is clearance-fitted with the countersunk hole of the tension release connector 1. The bottom is provided with a stud that has the same function as the original tension release column 2. The tension release connector 1 has a connection hole at the top, the tension release column 2 has a stud at the bottom, and the sleeve nut 5 has a groove at the bottom for applying torque.

[0008] Work process

[0009] like Figures 1-3 As shown, before the tension is released, the tension release device is subjected to axial preload, the release joint 1 is subjected to upward tension, the tension release column 2 is subjected to downward tension, the phase change block 4 is an annular part located below the piston nut 3, and the piston nut 3 is supported by the phase change block 4 and the sleeve nut 5. Since the piston nut 3 is fixedly connected to the tension release column 2, the tension release device can withstand the tension without slipping before the tension is released. When the phase change block is heated and melted by external heating, it can flow to the top of the piston nut 3 through the gap between the piston nut 3 and the slow-release connector 1. The piston nut 3 moves downward under the action of pre-tightening force until it contacts the sleeve nut 5. The length of the tension slow-release device increases, thereby achieving the effect of releasing the pre-tightening force.

Claims

1. A tension-relieving device, characterized in that, Includes tension release connector (1), tension release column (2), piston nut (3), phase change block (4), sleeve nut (5), and sealing ring (6); The tension relief connector (1) is a columnar component with a semi-threaded countersunk hole at the bottom; The tension-relieving column (2) is a columnar component with a stud at the top; The piston nut (3) is a block-shaped part with a threaded hole at the bottom. The piston nut (3) and the bottom countersunk hole of the tension relief connector (1) are in clearance fit. The phase change block (4) is a ring-shaped component with a melting point between 40 and 200°C; The sleeve nut (5) is an annular part with an external thread at the bottom and a through hole at the center. The inner wall of the through hole has an annular groove. The sealing ring (6) is a sealing ring; The sealing ring (6) is placed in the annular groove of the sleeve nut (5), with the sleeve nut (5) at the bottom and the phase change block (4) at the top, and is successively fitted onto the tension relief column (2). The stud at the top of the tension relief column (2) is screwed into the threaded hole of the piston nut (3). The piston nut (3) and the phase change block (4) are placed into the countersunk hole at the bottom of the tension relief connector (1). The sleeve nut (5) is screwed into the threaded hole at the bottom of the tension relief connector (1). When the phase change block (4) is heated and melted, it can flow into the top of the piston nut (3) through the gap between the tension release connector (1) and the piston nut (3).

2. The tension-relieving device according to claim 1, characterized in that, The tension release column (2) and the piston nut (3) can be combined into a single part. The axial section of the combined part is a "T" shaped structure. The top is provided with a cap-shaped protrusion that has the same function as the original piston nut (3) and is clearance-fitted with the countersunk hole of the tension release connector (1). The bottom is provided with a stud that has the same function as the original tension release column (2).

3. The tension-relieving device according to claim 1, characterized in that, The tension release connector (1) has a connection hole at the top, the tension release post (2) has a stud at the bottom, and the sleeve nut (5) has a groove at the bottom for applying torque.

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