A magnetic pulse connection device, method and eddy current damper for double-layer circular tubes

A connecting device and magnetic pulse technology, applied in auxiliary devices, applications, welding equipment, etc., can solve the problems of large stress gradient of intermetallic compounds, poor formability of aluminum alloys, failure of aluminum alloys, etc., to achieve good promotion prospects and improve processing flexibility. , the effect of no condensation

Active Publication Date: 2022-02-08
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the internal aluminum tube and the external steel tube are mechanically crimped, due to the poor formability of the aluminum alloy at room temperature, it is easy to cause the aluminum alloy to fail during connection; when non-mechanical welding is used, the thermal physical properties of steel and aluminum are significantly different. Traditional welding The method is prone to very brittle intermetallic compounds on the connection interface, resulting in a large stress gradient and affecting the quality

Method used

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  • A magnetic pulse connection device, method and eddy current damper for double-layer circular tubes
  • A magnetic pulse connection device, method and eddy current damper for double-layer circular tubes
  • A magnetic pulse connection device, method and eddy current damper for double-layer circular tubes

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Experimental program
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Effect test

Embodiment 1

[0091] see Figure 1-3 The magnetic pulse connecting device for double-layer circular tubes provided in this embodiment is a magnetic pulse welding device for aluminum inner tubes and steel outer tubes in a double-layer circular tube axial force eddy current damper with a coil as an inductor, Including: charging switch 1, step-up transformer 2, high-voltage rectifier 3, current limiting resistor 4, capacitor 5, discharge switch 6, inner tube support 7, outer tube support 8, protective sleeve 9, inner tube 10, outer tube 11, Limit support 12, inner pressure plate 13, outer pressure plate 14, screw rod 15, flange 16, core cover 17, turn wire 18, insulating bolt 19, mandrel 20, coil inductor 21.

[0092] Specifically, such as figure 1 , close the charging switch 1, the transformer 2 will raise the AC voltage from the power grid to several thousand volts, the high-voltage rectifier 3 will convert the AC into DC, and charge the capacitor 5 after reducing the loop current through t...

Embodiment 2

[0113] see Figure 25, the technical solution provided by this embodiment is basically the same as that of Embodiment 1, the difference is that the diameter of the outer tube 11 is changed, and an annular groove 111 is opened on the inner wall of the overlapping position of the outer tube 11, and the first stage of the outer tube support 8 is changed. The inner diameter of the stepped hole changes the discharge energy.

[0114] Specifically, the inner tube 10 is made of 6063 aluminum alloy, with an outer diameter of 116 mm, a wall thickness of 1 mm, and a height of 150 mm. The material of the outer tube 11 is Q235 steel, with an outer diameter of 126 mm, a wall thickness of 5 mm, and a height of 150 mm. A ring groove with a width of 4mm and a depth of 1mm is set at 48mm. The length of the overlapping area of ​​the inner and outer tubes is 100mm. The inner and outer tubes are in contact. Number 3, the outer diameter of the coil is 110mm, the axial length of the effective worki...

Embodiment 3

[0117] see Figure 26-28 , the technical solution provided by this embodiment is basically the same as that of Embodiment 1, the difference is that an insulating bakelite layer 23 and a magnetic collector 25 are set on the turn wire 18, and the insulating bolts 19 pass through the flange 16, Core cover 17, insulating bakelite layer 23, magnetic collector 25 are connected to mandrel 20;

[0118] Specifically, the inner tube 10 is made of 6063 aluminum alloy with an outer diameter of 116 mm, a wall thickness of 1 mm, and a height of 150 mm. The outer tube 11 is made of Q235 steel with an outer diameter of 128 mm, a wall thickness of 5 mm, and a height of 150 mm. 100mm, the gap between the inner and outer tubes is 1mm, and the inner diameter of the first step hole supported by the outer tube is 128mm.

[0119] Specifically, see Figure 28-38 , the magnetic collector-coil composite inductor 27 winds the turn wire 18 on the mandrel 20 made of insulating material, presses it tight...

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Abstract

The invention provides a magnetic pulse connection device for a double-layered circular tube, comprising an inner tube support and an outer tube support coaxially arranged, and one end of the inner tube support is provided with a first passage for passing a wire of a coil inductor The other end is provided with an annular positioning groove adapted to the outer tube, the outer tube support is connected with the top end of the inner tube support, the protective sleeve provides radial constraints to the inner tube support and the outer tube support at the same time, and the top end of the outer tube support is connected There is an inner pressure plate for pressing the outer tube, the inner pressure plate is connected with a flange that can slide in the axial direction in the inner tube support, the flange is connected with a coil inductor, and the coil inductor includes a core cover, a core shaft and The wire turns, the insulating bolts are connected through the flange, the core cover and the mandrel in turn, the turns are wound on the mandrel and pressed by the core cover; the magnetic pulse connection device for the double-layer circular tube provided by the present invention is safe and efficient, It can improve the forming limit of the material, is green and low-carbon, does not produce very brittle metal compounds on the welding interface, and can ensure the connection strength.

Description

technical field [0001] The invention belongs to the technical field of connecting metal pipe fittings, and in particular relates to a device and method for connecting double-layer round pipes in an eddy current damper using magnetic pulse forming technology and the eddy current damper. Background technique [0002] A damper is a device that dissipates motion energy by outputting resistance. Widely used in aviation, aerospace, military industry, automobile, civil engineering and other industries. The eddy current damper is one of them. It has the advantages of simple structure, convenient maintenance and long working life, and has a wide application prospect. The basic principle of the eddy current damping shock absorber is: the conductor cuts the magnetic force line, and the eddy current generated in the conductor achieves the purpose of dissipating the vibration energy through the resistance thermal effect; at the same time, the eddy current will also generate a new magnet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/06B23K20/26B23K37/053E04B1/98E04H9/02
CPCB23K20/06B23K20/26B23K37/053E04B1/98E04H9/02B23K2101/06F16F15/035
Inventor 蒋浩蔡达崔俊佳李光耀
Owner HUNAN UNIV
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