High-temperature collecting ring structure

Abstract

The invention discloses a high-temperature collecting ring structure. The high-temperature collecting ring structure is characterized by comprising a junction box and a high-temperature wire connected with the junction box, a shielding insulation net protection layer is arranged outside the high-temperature wire, and a wiring terminal is arranged at the end part of the high-temperature wire; the high-temperature wire comprises a conductor wire core, and a combined insulating layer, a shielding layer and a sheath are arranged outside the conductor wire core. The junction box comprises a box body, a box body cover plate is arranged above the box body, pipe joints are arranged on two opposite sides, and a socket is arranged on the other side; the wiring terminal comprises a wiring ring sheet, a front welding sheet and a rear crimping sheet. The high-temperature-resistant temperature compensation wire is small in wire diameter, light in weight, easy to bend and particularly suitable for being laid on an engine in a bent mode, and the problems that an existing high-temperature-resistant temperature compensation wire which is resistant to the temperature of 300 DEG C or above in engineering application is large in wire diameter, large in weight, not prone to bending and not capable of meeting the requirement of a bent feeder line of a collecting ring cable are effectively solved.

Description

Technical Field

[0001] The invention belongs to the technical field of collector rings for aircraft engines, and specifically relates to a high-temperature collector ring structure used for connecting thermocouples under ultra-high temperature conditions and outputting thermoelectric potential signals of the thermocouples in parallel to an engine electronic controller. Background Art

[0002] The engine collector ring is mainly used to connect thermocouples and output the thermoelectric potential signal of the thermocouple in parallel to the engine electronic controller, which determines the engine working status based on the output of the collector ring. At present, with the development of various new engines, the temperature resistance level of the engine is gradually increasing. The maximum temperature resistance level of conventional collector rings of 260°C cannot meet the high temperature requirements of new engines, and they also need to achieve high integration, high reliability, and convenient installation.

[0003] The present invention provides a structure for improving the temperature resistance level of the collector ring. On the basis of improving the temperature resistance level of the collector ring, it also has the characteristics of high softness and lightness, and solves the problems of limited temperature resistance of the collector ring and inability to weld and transfer at high temperature. Summary of the invention

[0004] The object of the present invention is to provide a high temperature collector ring structure to solve the problems in the prior art.

[0005] The present invention is realized by the following technical scheme: a high-temperature collector ring structure, characterized in that: it includes a junction box and a high-temperature wire connected to the junction box; a shielding insulation net protective layer is arranged on the outside of the high-temperature wire, and a wiring terminal is arranged at the end of the high-temperature wire; the high-temperature wire includes a conductor core, and a combined insulation layer and a shielding layer and a sheath are arranged on the outside of the conductor core; the junction box includes a box body, a box body cover is arranged above the box body, pipe joints are arranged on two opposite sides, and a socket is arranged on the remaining side; the wiring terminal includes a wiring ring piece, a front welding piece and a rear crimping piece.

[0006] Furthermore: the high-temperature wire includes two or more conductor cores, a combined insulation layer is arranged on the outside of each core, and a shielding layer and a sheath are arranged on the outside of all the cores.

[0007] Furthermore: the box cover and the socket are fixed to the box body by screws respectively.

[0008] Furthermore: the box cover, pipe joint, socket and box body are all made of titanium alloy; the screws are made of stainless steel.

[0009] Furthermore: the shielding insulation net protective layer is formed by mixing and weaving basalt wires and metal nickel wires.

[0010] Further: a plurality of measuring points are arranged on the high temperature wire, and the measuring points include the high temperature wire and the wiring terminals connected thereto.

[0011] The advantages of the present invention are: the scheme adopts a new type of high temperature resistant temperature compensation wire, the temperature resistance grade reaches 300℃, the nickel-chromium-nickel-silicon core conductor is used, and multiple composite insulation materials are used for insulation, which has excellent electrical properties and high and low temperature resistance, and has the properties of resistance to liquid pollution, wear resistance, cracking resistance, and cutting resistance. The scheme has small wire diameter, light weight, and easy bending, which is particularly suitable for bending and laying on the engine, and effectively overcomes the problem that the high temperature resistant temperature compensation wire with a resistance of more than 300℃ in existing engineering applications has large wire diameter, heavy weight, and is not easy to bend, and does not meet the requirements of the bending feeder of the collector ring cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the collector ring of the present invention; Figure 2 A schematic diagram of the structure of the high temperature resistant wire of the present invention; Figure 3 It is a schematic diagram of the structure of the invented junction box; Figure 4 It is a schematic diagram of the weaving of the protective layer of the shielding net.

[0013] Explanation of the serial numbers in the figure: 1. high-temperature wire; 2. shielding insulation net protective layer; 3. junction box; 4. terminal; 101. conductor core; 102. combined insulation layer; 103. shielding layer; 104. sheath; 301. box cover; 302. pipe joint; 303. socket; 304. screw; 305. box body; 401. wiring ring piece; 402. front welding piece; 403. rear crimping piece. DETAILED DESCRIPTION

[0014] Reference Figure 1-4 The present invention discloses a high-temperature collector ring structure, which includes a junction box 3 and a high-temperature wire 1 connected to the junction box 3; a shielding insulation net protection layer 2 is arranged on the outside of the high-temperature wire 1, and a terminal 4 is arranged at the end of the high-temperature wire 1; the high-temperature wire 1 includes a conductor core 101, and a combined insulation layer 102, a shielding layer 103 and a sheath 104 are arranged on the outside of the conductor core 101; the junction box 3 includes a box body 305, a box body cover 301 is arranged above the box body 305, pipe joints 302 are arranged on two opposite sides, and a socket 303 is arranged on the remaining side; the terminal 4 includes a wiring ring piece 401, a front welding piece 402 and a rear crimping piece 403.

[0015] Preferably, the high-temperature wire 1 comprises two or more conductor cores 101 , a combined insulating layer 102 is arranged on the outside of each core 101 , and a shielding layer 103 and a sheath 104 are arranged on the outside of all the cores 101 .

[0016] Preferably, the box cover 301 and the socket 303 are fixed to the box body 305 by screws 304 respectively.

[0017] Preferably, the box cover 301, the pipe joint 302, the socket 303 and the box body 305 are all made of titanium alloy; and the screws 304 are made of stainless steel.

[0018] Preferably, the shielding insulation mesh protective layer 2 is formed by mixing and weaving basalt wires and metal nickel wires.

[0019] Preferably, a plurality of measuring points are arranged on the high-temperature wire 1 , and the measuring points include the high-temperature wire 1 passing through the shielding insulation net protective layer and the connecting terminal 4 connected to the high-temperature wire 1 .

[0020] Embodiment: A high-temperature collector ring structure is composed of a high-temperature resistant wire + a shielded insulation net protection layer + a junction box + a terminal.

[0021] Among them, the high temperature resistant wire includes a silver-plated copper conductor core, a high temperature resistant composite insulation layer, a metal shielding layer, and a polyimide insulation sheath. A single wire core is composed of 19 strands of 0.20mm silver-plated copper wire; the composite insulation layer is wrapped with polyimide and other high temperature resistant composite materials; the shielding layer is woven with nickel-plated copper wire, and the weaving density is not less than 85%; the sheath is made of polyimide wrapping. The wire has strong anti-electromagnetic interference ability and can work reliably for a long time in an environment of -65℃ to 350℃.

[0022] Among them, the shielding insulation net protective layer is a braided sheath of high-temperature resistant metal composite basalt fiber wire for aerospace use. It is woven together with high-temperature resistant metal composite basalt fiber wire for aerospace use made of basalt and nickel wire. According to the thickness of the wire harness diameter, 24 to 48 strands are used, and each strand is woven with 7 to 16 mixed wires. It is tightly wrapped around the outside of the wire harness, and the shielding coverage rate reaches more than 97%, which effectively prevents external interference signals from entering the internal conductor and protects the wire harness. It is resistant to high temperature, flame retardant, salt spray resistant, mildew resistant, moisture-proof, and resistant to fluid pollution.

[0023] The junction box is an electrical integrated component. The socket on the box body adopts a new type of high-temperature resistant connector with a temperature resistance of 350°C. The junction box cover is made of titanium alloy, the upper box body, the box body and the lower box body are made of titanium alloy, the gasket and the pipe joint are made of titanium alloy, and the screws used to fix the junction box are all made of stainless steel. The upper box body, the lower box body and the box body, as well as the box body and the pipe joint of the junction box are welded by argon arc welding.

[0024] The terminal block is used to connect the engine terminal post to transmit the temperature signal. The terminal block consists of positive and negative terminal blocks, which are made of nickel-chromium-nickel-silicon materials. To ensure the reliability of the connection with the wire, it is designed as a double-clamp terminal block. The structure is divided into three parts, namely the terminal ring block, the front welding block, and the rear crimping block.

[0025] This solution overcomes the problem that the existing high-temperature resistant temperature compensation conductors with a resistance of more than 300°C in engineering applications have large wire diameters, heavy weights, and are difficult to bend, which do not meet the requirements of the curved feeder of the collector ring cable. A new type of high-temperature resistant temperature compensation conductor is used, with a temperature resistance of 300°C, a nickel-chromium-nickel-silicon core conductor, and multiple composite insulation materials. It has excellent electrical properties and high and low temperature resistance, and has the properties of resistance to liquid pollution, wear resistance, cracking resistance, and cutting resistance. It has a small wire diameter, light weight, and is easy to bend, which is particularly suitable for bending and laying on the engine.

[0026] The high temperature resistant metal composite basalt fiber wire braided sheath is used as the shielding insulation net protective layer. It is made of basalt and nickel wire and is braided by a braiding machine on the outside of the bundled wire bundle. One end is tightly connected to the outlet of the junction box, and the other end is fixed to the terminal to achieve 360-degree connection of the shielding layer.

[0027] The circuit integration of the collector ring adopts a junction box design. The junction box is integrated to realize the integration of 8 thermocouple electrical signal paths and 2 electrical signal outputs in the junction box. The junction box is intended to be installed in the engine compartment box, and the size of the box needs to be controlled to ensure installation.

[0028] The terminal block adopts a positive and negative combination, and the positive and negative terminal lugs are made of nickel-chromium-nickel silicon material respectively. In order to ensure the reliability of the connection with the wire, it is designed as a double-clamp terminal lug. The structure is divided into three parts, namely the terminal ring lug, the front welding lug, and the rear crimping lug. At the same time, in order to prevent wrong insertion, the design is divided into two structures: bent and straight. The front terminal ring lug is strictly customized according to the size of the terminal post to adapt to the installation size of the terminal post. Different wire diameters, straight and bent lugs are used to prevent errors. That is, the lug terminated with the KA terminal bolt of the positive terminal of the terminal uses a bent nickel-chromium lug with an inner diameter of Φ4.3, and the negative terminal uses a straight nickel-silicon lug with an inner diameter of Φ5.3; similarly, the KB end uses a straight nickel-chromium lug with an inner diameter of Φ4.3 and a bent nickel-silicon lug with an inner diameter of Φ5.3.

[0029] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A high temperature collector ring structure, characterized in that: It comprises a junction box (3) and a high-temperature wire (1) connected to the junction box (3); a shielding insulation net protection layer (2) is arranged outside the high-temperature wire (1), and a wiring terminal (4) is arranged at the end of the high-temperature wire (1); The high-temperature wire (1) comprises a conductor core (101), and a combined insulation layer (102), a shielding layer (103) and a sheath (104) are arranged outside the conductor core (101); The junction box (3) comprises a box body (305), a box body cover plate (301) is arranged above the box body (305), pipe joints (302) are arranged on two opposite sides, and a socket (303) is arranged on the remaining side; The connection terminal (4) comprises a connection ring piece (401), a front welding piece (402) and a rear crimping piece (403).

2. A high temperature collector ring structure according to claim 1, characterized in that: The high-temperature wire (1) comprises two or more conductor cores (101), a combined insulating layer (102) is arranged on the outside of each core (101), and a shielding layer (103) and a sheath (104) are arranged on the outside of all the cores (101).

3. A high temperature collector ring structure according to claim 1, characterized in that: The box cover (301) and the socket (303) are fixed to the box body (305) by screws (304) respectively.

4. A high temperature collector ring structure according to claim 1, characterized in that: The box cover (301), the pipe joint (302), the socket (303), and the box body (305) are all made of titanium alloy; and the screws (304) are made of stainless steel.

5. A high temperature collector ring structure according to claim 1, characterized in that: The shielding insulation net protective layer (2) is formed by mixing and weaving basalt wires and metal nickel wires.

6. A high temperature collector ring structure according to claim 1, characterized in that: A plurality of measuring points are arranged on the high-temperature wire (1), wherein the measuring points include the high-temperature wire (1) and a connecting terminal (4) connected thereto.

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