Permanent magnet electric starter outlet structure and method for gas turbine

Abstract

The application discloses a permanent magnet electric starter outlet structure and method for a gas turbine, which comprises a rear end cover wire clamp assembly, a junction box wire clamp assembly, a junction box and a welding point sealing cover shell; the rear end cover wire clamp assembly is fixedly installed on the rear end cover, a rear end cover wire clamp base is arranged in the rear end cover wire clamp assembly, a wire pressing groove is formed in the rear end cover wire clamp base, the junction box wire clamp assembly is arranged in the junction box, the junction box wire clamp base is fixedly installed with the junction box, a junction box wire clamp base is arranged in the junction box wire clamp assembly, a combined wire pressing groove for winding outgoing wires and a combined wire pressing hole for sensor outgoing wires are arranged on the junction box wire clamp base, the junction box socket in the junction box is installed perpendicularly to the ground, the winding outgoing wires and the sensor outgoing wires are parallelly welded with the junction post of the junction box socket, and the welding point sealing cover shell is arranged on the welding points between the junction box socket and the winding outgoing wires and the sensor outgoing wires. The application effectively improves the outlet reliability of the motor in a bad environment.

Description

Technical Field

[0001] This invention belongs to the field of motor technology, and in particular to a permanent magnet electric starter cable output structure and method for gas turbines. Background Technology

[0002] Permanent magnet starter motors (PMSMs) are characterized by high efficiency, high power density, and high precision. To adapt to the space optimization and power supply upgrade requirements of marine gas turbine systems, the use of PMSMs as the starting actuators has become a development trend. However, with the continuous optimization of ship space layout, the installation position of PMSMs is getting closer and closer to the combustion chamber of the gas turbine, leading to increasingly higher maximum operating temperatures for the motors. Since PMSMs stop working immediately after starting, the temperature drops sharply under water cooling and other forced cooling measures, causing condensation to form inside the motor. Over time, the accumulated temperature differences from start-stop cycles increase the amount of condensation. Traditional wiring methods lack effective protection against condensation at the solder joints caused by these temperature differences, severely affecting the insulation performance of the windings and even causing short circuits and burnout of the motor. Currently, marine gas turbines are demanding increasingly higher output power from motors while also facing stricter limitations on weight and size. To meet these requirements, the voltage and current of the motors are also increasing, placing more stringent demands on wiring design. Traditional wiring methods, with their large space requirements, are no longer sufficient. The operating environment for permanent magnet starter motors used in marine gas turbines is harsh, requiring them to withstand vibration, impact, humidity, heat, and fluid contamination. Existing wiring methods suffer from inadequate cable fixation, leading to high-frequency oscillations and contact with other components, causing insulation wear and severely impacting insulation performance. Furthermore, insufficient protection at the cable exit point allows water, turbine cleaning agents, and oil to enter, affecting insulation. Traditional lateral cable routing cannot meet the requirements of shipboard hull routing, requiring cable bending, which is prone to stress damage under vibration, and inconvenient wiring operations, significantly affecting cable reliability. Summary of the Invention

[0003] The purpose of this invention is to provide a permanent magnet electric starter cable outlet structure and method for gas turbines, which solves the problems in the prior art such as condensation caused by large and rapid temperature changes, ineffective insulation, large cable outlet space occupation, inability of the lead wire to withstand vibration, impact, damp heat, fluid pollution and other harsh ship environments, and insufficient protection level leading to unfavorable cable outlet direction in the bottom tank.

[0004] To achieve the above objectives, the present invention employs the following technical solution: A permanent magnet electric starter cable outlet structure for a gas turbine includes a rear end cover clamp assembly, a junction box clamp assembly, a junction box, and a weld joint sealing cover. The rear cover clamp assembly is fixedly installed on the rear cover of the permanent magnet starter. The rear cover clamp assembly has a rear cover clamp base with a wire pressing groove. The junction box clamp assembly is installed inside the junction box, and the junction box clamp base is fixedly installed to the junction box. The junction box clamp assembly has a junction box clamp base with a combined wire pressing groove for winding leads and a combined wire pressing hole for sensor leads. The junction box socket inside the junction box is installed perpendicular to the ground. The winding leads and sensor leads are welded parallel to the terminals of the junction box socket. The solder joint sealing cover is installed on the solder joint between the junction box socket and the winding leads and sensor leads.

[0005] Furthermore, a countersunk hole is provided on the rear cover cable clamp base, and the rear cover cable clamp base is fixed to the rear cover by screws through the countersunk hole.

[0006] Furthermore, the rear cover wire clamp assembly is also provided with a rear cover wire clamp cover, which has a countersunk hole. The rear cover wire clamp cover is fixed to the rear cover wire clamp base by screws through the countersunk hole.

[0007] Furthermore, the junction box socket includes a winding socket and a sensor socket, both of which are sealed aviation sockets.

[0008] Furthermore, the junction box clamp base has a countersunk hole, and the rear cover clamp base is fixed to the junction box with screws through the countersunk hole.

[0009] Furthermore, the junction box clamp assembly is also equipped with a junction box clamp cover, which has a countersunk hole. The junction box clamp cover is fixed to the junction box clamp base by screws through the countersunk hole.

[0010] Furthermore, the junction box is installed in a sealed manner with the junction box cover using an O-ring.

[0011] Furthermore, the solder joint sealing cover is fastened to the junction box with screws. The solder joint sealing cover includes a winding socket solder joint sealing cover and a sensor solder joint sealing cover. The bottom of both the winding socket solder joint sealing cover and the sensor solder joint sealing cover is provided with a mounting groove, and a square sealing gasket is installed in the mounting groove.

[0012] Furthermore, a heat shrink tubing is provided at the outlet of the rear cover, and the heat shrink tubing is sealed to the weld point sealing cover by curing with sealant.

[0013] A method for outputting a permanent magnet electric starter for a gas turbine with the aforementioned structure includes: Place the winding leads and sensor leads in the pressure groove of the rear cover wire clamp base to reliably secure the winding leads and sensor leads in the rear cover section. The winding lead wire passing through the rear cover clamp assembly is placed into the combined clamping groove for winding lead wires of the junction box clamp base, and the sensor lead wire is placed into the combined clamping hole for sensor lead wires of the junction box clamp base. The winding lead wire and the sensor lead wire are soldered parallel to the terminal of the junction box socket. The winding leads and sensor leads passing through the junction box clamp assembly are vertical. The solder joint sealing cover is inserted into the winding leads and sensor leads, and the winding leads and sensor leads are soldered to the junction box socket. The solder joint sealing cover is then installed on the solder joint between the junction box socket and the leads to seal the wire exit at the rear end cover.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a wiring structure and method for a permanent magnet electric starter for gas turbines. A rear end cover clamp assembly is fixedly installed on a rear end cover. The rear end cover clamp assembly includes a rear end cover clamp base with a wire-pressing groove. This reliably secures the winding leads and sensor leads to the rear end cover clamp base, preventing wear caused by contact between the wires and the rear end cover during vibration and impact. A junction box clamp assembly is placed inside a junction box, with the junction box clamp base fixedly installed to the junction box. The junction box clamp assembly includes a junction box clamp base with a combined wire-pressing groove for the winding leads and a combined wire-pressing hole for the sensor leads. This ensures the reliability of the leads in the junction box section under vibration and impact conditions, while also preventing the leads from rubbing against the junction box housing and causing damage. The junction box socket inside the junction box is installed perpendicular to the ground to accommodate shipboard cable routing requirements and reduce stress caused by vibration and impact on cables when cables are routed laterally. The winding leads and sensor leads are soldered parallel to the terminals of the junction box socket to prevent continuous stress on the terminals of the junction box socket due to positional deviation, which would affect service life and cable insertion / removal. A solder joint sealing cover is placed on the solder joint between the junction box socket and the winding leads and sensor leads to seal the solder joint between the junction box socket and the leads inside the junction box. This invention effectively improves the reliability of the motor's wiring in harsh environments by utilizing optimized wiring path design, multi-segment wiring fastening devices, junction box socket solder joint sealing devices, and vertical wiring junction boxes. It can effectively protect the wiring structure of permanent magnet starter motors used in marine gas turbines under harsh environments such as high temperature differences, strong vibration, strong impact, humidity, and fluid contamination. It can operate normally under an AC voltage of 1200V and a current of 350A, providing strong resistance to vibration and impact in the marine environment and ensuring reliable insulation under a maximum vibration and impact of 10g. Meanwhile, it can reliably output wires under large and rapid temperature changes from high temperature of 180℃ to low temperature of -20℃, meeting IP56 protection requirements, and ensuring reliable insulation at the motor output wires when contaminated by gas turbine cleaning agents, fuel oil, oily fluids, or when condensation occurs inside. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the output structure of the permanent magnet electric starter for gas turbines according to the present invention.

[0017] Figure 2 This is a cross-sectional view AA of the output structure of the permanent magnet electric starter for gas turbines according to the present invention.

[0018] Figure 3 This is a schematic diagram of the rear cover clamp assembly of the present invention.

[0019] Figure 4 is a schematic diagram of the rear cover wire clamp base of the present invention, wherein (a) is a right view of the rear cover wire clamp base and (b) is a cross-sectional view of the rear cover wire clamp base.

[0020] Figure 5 is a schematic diagram of the rear end cover clamp of the present invention, wherein (a) is a right view of the rear end cover clamp, (b) is a cross-sectional view of the rear end cover clamp, and (c) is a left view of the rear end cover clamp.

[0021] Figure 6 This is a schematic diagram of the junction box of the present invention.

[0022] Figure 7 is a schematic diagram of the junction box clamp base of the present invention, wherein (a) is a bottom view of the junction box clamp base, (b) is a cross-sectional view of the junction box clamp base, and (c) is a top view of the junction box clamp base.

[0023] Figure 8 is a schematic diagram of the junction box wire clamp cover of the present invention, wherein (a) is a top view of the junction box wire clamp cover and (b) is a cross-sectional view of the junction box wire clamp cover.

[0024] Figure 9 is a schematic diagram of the socket solder joint sealing cover of the present invention, wherein (a) is a left view of the socket solder joint sealing cover and (b) is a front view of the socket solder joint sealing cover.

[0025] Figure 10 is a schematic diagram of the sensor solder joint sealing cover of the present invention, wherein (a) is a left view of the sensor solder joint sealing cover and (b) is a front view of the sensor solder joint sealing cover.

[0026] Wherein: 1-Rear end cover clamp assembly, 11-Rear end cover clamp base, 12-Rear end cover clamp cover, 2-Junction box clamp assembly, 21-Junction box clamp base, 22-Junction box clamp cover, 3-Junction box, 31-Junction box cover, 32-O-ring seal, 4-Solder joint sealing cover, 41-Winding socket solder joint sealing cover, 42-Sensor solder joint sealing cover, 5-Lead wire, 6-Junction box socket, 61-Winding socket, 62-Sensor socket, 7-Square sealing gasket, 8-Heat shrink tubing. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0033] The present invention will now be described in further detail with reference to the accompanying drawings: See Figure 1 and Figure 2 This invention provides a wiring structure for a permanent magnet electric starter for gas turbines, including a rear end cover clamp assembly 1, a junction box clamp assembly 2, a junction box 3, a weld joint sealing cover 4, a square sealing gasket 7, and a heat shrink tubing 8. The lead wires 5 include winding lead wires and sensor lead wires.

[0034] like Figure 3 As shown, the rear cover wire clamp assembly 1 is fixedly installed on the rear cover of the permanent magnet starter, securing the winding leads and sensor leads of the permanent magnet starter in their designed positions to prevent wear caused by contact between the wires and the rear cover during vibration and impact. The rear cover wire clamp assembly 1 includes a rear cover wire clamp base 11 and a rear cover wire clamp cover 12, as shown in Figures 4 and 5. A rounded combined wire pressing groove is designed in the middle to ensure that the rear cover wire clamp cover 12 can reliably fix the winding leads and sensor leads to the rear cover wire clamp base 11. The rear cover wire clamp base 11 has a countersunk hole and is fixedly installed to the rear cover with screws. The rear cover wire clamp cover 12 also has a countersunk hole and is fixedly installed to the rear cover wire clamp base 11 with screws. The specific installation angle on the rear cover is determined based on the analysis results of the stress on the leads.

[0035] like Figure 6 As shown, the junction box 3 includes a junction box cover 31, an O-ring seal 32, and a junction box socket 6. The junction box socket 6 includes a winding socket 61 and a sensor socket 62. It is installed vertically to the ground and is a sealed aviation socket. The junction box cover 31 and the junction box 3 are sealed together by the O-ring seal 32, which can effectively prevent oil, cleaning agents, seawater and other fluids in the operating environment of the ship's gas turbine from entering the junction box.

[0036] The junction box clamp assembly 2 is housed in a highly protective junction box 3 to prevent various fluids from entering the gas turbine. It is designed for vertical cable exit to meet the requirements of ship cable layout and to reduce the stress caused by vibration impact on the cable when exiting laterally.

[0037] The junction box clamp assembly 2 secures the permanent magnet starter winding leads and sensor leads at their designed positions. The designed installation positions ensure that the leads do not rub against the junction box 3 housing during vibration and impact, while also ensuring bending strength and not affecting welding to the junction box socket 6. The junction box clamp assembly 2 includes a junction box clamp base 21 and a junction box clamp cover 22, as shown in Figures 7 and 8. The junction box clamp base 21 and the junction box clamp cover 22 are designed with rounded combined clamping grooves for the winding leads and combined clamping holes for the sensor leads, ensuring that the junction box clamp cover 22 can reliably fix the winding leads to the junction box clamp base 21. The height dimension design allows the leads to be welded parallel to the terminals of the junction box socket 6, preventing continuous stress on the terminals of the junction box socket 6 due to positional deviations, which could affect service life and cable insertion / removal. The junction box clamp base 21 has a countersunk hole and is fixed to the junction box 3 with screws. Its installation position is on one side of the mounting wall of the junction box socket 6, which is the point where the lead wire bends and the solder joint at the junction box socket 6 is subjected to the least stress. The junction box clamp cover 22 has a countersunk hole and is fixed to the junction box clamp base 21 with screws.

[0038] The solder joint sealing cover 4 is fastened to the junction box 3 with screws. The solder joint sealing cover 4 is installed on the lowest vertical surface of the junction box 3 to seal the solder joints between the junction box socket 6 and the lead wire inside the junction box 3. There are two types of solder joint sealing covers 41 and 42, as shown in Figures 9 and 10. Both the winding socket solder joint sealing cover 41 and the sensor solder joint sealing cover 42 have mounting grooves at their bottoms. Square sealing gaskets 7 are installed in the mounting grooves. When condensation occurs inside the junction box 3 of the permanent magnet starter due to high and low temperature switching, the condensation drips and collects at the solder joints. The solder joint sealing cover 4 prevents water from entering the solder joints, ensuring the insulation performance of the solder joints.

[0039] A heat shrinkable sleeve 8 is provided at the outlet of the rear cover. The heat shrinkable sleeve 8 and the weld sealing cover 4 are sealed by curing with sealant. After the sealant cures, the heat shrinkable sleeve 8 is heat-shrinkable. The length of the heat shrinkable sleeve 8 can cover the outlet of the rear cover, further enhancing the sealing effect and preventing fluid from entering the outlet of the rear cover.

[0040] The present invention also provides a method for outputting a permanent magnet electric starter for a gas turbine, comprising: Step 1: Place the winding lead wire and sensor lead wire of the permanent magnet starter into the combined wire pressing groove opened on the rear cover wire clamp base 11. Fix the rear cover wire clamp cover 12 on the rear cover wire clamp base 11 with screws to ensure that the winding lead wire and sensor lead wire can be reliably fixed on the rear cover wire clamp base 11 to prevent the wire from contacting the rear cover and causing wear during vibration and impact.

[0041] Step 2: Place the winding lead wires and sensor lead wires from the rear cover clamp assembly 1 into the combined crimping groove for the winding lead wires and the combined crimping hole for the sensor lead wires, respectively, located between the junction box clamp base 21 and the junction box clamp cover 22. The height-oriented dimension design allows the lead wires 5 to be welded parallel to the terminals of the junction box socket 6, preventing continuous stress on the terminals of the junction box socket 6 due to positional deviations, which could affect service life and cable insertion / removal. Secure the junction box clamp cover 22 to the junction box clamp base 21 with screws to ensure the reliability of the lead wires in section 3 of the junction box under a maximum vibration and impact environment of 10g. This also ensures that the lead wires do not rub against the housing of the junction box 3 and are not damaged during vibration and impact, and does not affect their welding to the junction box socket 6.

[0042] Step 3: Design the winding leads and sensor leads passing through the junction box clamp assembly 2 to be vertically exited in order to adapt to the ship's cable layout requirements and reduce the stress caused by vibration impact on the cable when exiting laterally.

[0043] Step 4: Insert the solder joint sealing cover 4, the square sealing gasket 7, and the heat shrink tubing 8 into the lead wire 5, and weld the lead wire 5 to the junction box socket 6. Insert the square sealing gasket 7 into the corresponding sealing groove of the solder joint sealing cover 4, and fasten the solder joint sealing cover 4 to the junction box 3 with screws. Pour sealant into the inside of the solder joint sealing cover 4. After the sealant has cured, heat shrink the heat shrink tubing 8 to completely seal the solder joint. Finally, install the junction box wire clamp cover 31.

[0044] Example 1: The rear cover wire clamp assembly 1 includes a rear cover wire clamp base 11 and a rear cover wire clamp cover 12. A combined wire pressing groove with a length of 17.5mm and a height of 9mm and a rounded radius of 2 is designed in the middle. This size can ensure that the rear cover wire clamp cover 12 can reliably fix the winding lead wire and the sensor lead wire on the rear cover wire clamp base 11. The specific installation angle on the rear cover is determined according to the analysis results of the force on the lead wire. This design can ensure the reliability of the lead wire of the rear cover section under a vibration and impact environment of up to 10g.

[0045] The junction box clamp assembly 2 includes a junction box clamp base 21 and a junction box clamp cover 22. Between the junction box clamp base 21 and the junction box clamp cover 22, there are three 19.5mm long and 9mm high, rounded R2 grooves for winding lead wires and one 9mm Φ9mm sensor lead wire hole. This size ensures that the junction box clamp cover 22 can reliably fix the winding lead wires to the junction box clamp base 21. The height dimension design allows the lead wires to be soldered parallel to the terminals of the junction box socket 6. The installation position of the junction box clamp base 21 is designed to be 65mm away from the mounting wall of the junction box socket 6. This distance minimizes the stress on the solder joints where the lead wires bend and connect to the junction box socket 6. This design ensures the reliability of the three lead wires in the junction box under a maximum vibration and shock environment of 10g.

[0046] The junction box clamp assembly 2 is housed within the highly protective junction box 3 and is designed for vertical cable exit. The junction box socket 6 is installed vertically to the ground and is a sealed aviation socket. The junction box cover 31 is sealed to the junction box 3 by an O-ring 32, achieving an IP56 protection rating.

[0047] The solder joint sealing cover 4 is fastened to the junction box 3 with screws. The solder joint sealing cover 4 is installed on the lowest vertical surface of the junction box 3 to ensure the insulation performance of the solder joint.

[0048] A heat shrink tubing 8 is provided at the outlet of the rear cover. The length of the heat shrink tubing 8 can cover the outlet of the rear cover. The heat shrink tubing 8 and the weld point sealing cover 4 are sealed by curing with sealant. After the sealant cures, the heat shrink tubing 8 is heat-shrinked to further enhance the sealing effect and prevent fluid from entering the outlet of the rear cover.

[0049] This invention can completely seal the solder joint. When the gas turbine is frequently started in the harsh marine environment of a ship, the temperature of the permanent magnet electric starter changes drastically and frequently, causing condensation inside. Over the years, water will accumulate at the lowest point of the junction box 3 with the vertical cable outlet design. This invention can isolate the water outside the solder joint, so that the insulation performance between the lead wire 5 and the junction box socket 6 is not affected.

[0050] Unless otherwise specified, the equipment components involved in the above embodiments are all conventional equipment components, and the structural settings, working methods or control methods involved are all conventional settings, working methods or control methods in the art unless otherwise specified.

[0051] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A cable output structure for a permanent magnet electric starter for a gas turbine, characterized in that, It includes a rear cover clamp assembly (1), a junction box clamp assembly (2), a junction box (3), and a solder joint sealing cover (4). The rear cover clamp assembly (1) is fixedly installed on the rear cover of the permanent magnet starter. The rear cover clamp assembly (1) is provided with a rear cover clamp base (11). The rear cover clamp base (11) is provided with a wire pressing groove. The junction box clamp assembly (2) is installed in the junction box (3). The junction box clamp base (21) is fixedly installed with the junction box (3). The junction box clamp assembly (2) is provided with a junction box clamp base (21). The junction box clamp base (21) is provided with a combined wire pressing groove for winding lead wires and a combined wire pressing hole for sensor lead wires. The junction box socket (6) in the junction box (3) is installed perpendicular to the ground. The winding lead wires and sensor lead wires are welded parallel to the terminals of the junction box socket (6). The solder joint sealing cover (4) is installed on the solder joint between the junction box socket (6) and the winding lead wires and sensor lead wires.

2. The output cable structure of a permanent magnet electric starter for a gas turbine according to claim 1, characterized in that, The rear cover clamp base (11) has a countersunk hole, and the rear cover clamp base (11) is fixed to the rear cover by screws through the countersunk hole.

3. The output cable structure of a permanent magnet electric starter for a gas turbine according to claim 1, characterized in that, The rear cover wire clamp assembly (1) is also provided with a rear cover wire clamp cover (12). The rear cover wire clamp cover (12) has a countersunk hole. The rear cover wire clamp cover (12) is fixed to the rear cover wire clamp base (11) by screws through the countersunk hole.

4. The output cable structure of a permanent magnet electric starter for a gas turbine according to claim 1, characterized in that, The junction box socket (6) includes a winding socket (61) and a sensor socket (62), both of which are sealed aviation sockets.

5. The output cable structure of a permanent magnet electric starter for a gas turbine according to claim 1, characterized in that, A countersunk hole is provided on the junction box clamp base (21), and the rear cover clamp base (11) is fixed to the junction box (3) by screws through the countersunk hole.

6. The output cable structure of a permanent magnet electric starter for a gas turbine according to claim 1, characterized in that, The junction box clamp assembly (2) is also provided with a junction box clamp cover (22). The junction box clamp cover (22) has a countersunk hole. The junction box clamp cover (22) is fixed to the junction box clamp base (21) by screws through the countersunk hole.

7. The output cable structure of a permanent magnet electric starter for a gas turbine according to claim 1, characterized in that, The junction box (3) is sealed to the junction box cover (31) by an O-ring (32).

8. The output cable structure of a permanent magnet electric starter for a gas turbine according to claim 1, characterized in that, The solder joint sealing cover (4) is fastened to the junction box (3) by screws. The solder joint sealing cover (4) includes the winding socket solder joint sealing cover (41) and the sensor solder joint sealing cover (42). The bottom of the winding socket solder joint sealing cover (41) and the sensor solder joint sealing cover (42) are provided with mounting grooves, and square sealing gaskets (7) are installed in the mounting grooves.

9. The output cable structure of a permanent magnet electric starter for a gas turbine according to claim 1, characterized in that, A heat shrink tubing (8) is provided at the outlet of the rear cover, and the heat shrink tubing (8) and the weld point sealing cover (4) are sealed by curing with sealant.

10. A method for outputting a permanent magnet electric starter for a gas turbine with the structure described in any one of claims 1 to 9, characterized in that, include: Place the winding lead wire and sensor lead wire in the pressure groove of the rear cover wire clamp base (11) to reliably secure the winding lead wire and sensor lead wire in the rear cover section. The winding lead wire passing through the rear cover clamp assembly (1) is placed into the winding lead wire combination pressure groove of the junction box clamp base (21), and the sensor lead wire is placed into the sensor lead wire combination pressure hole of the junction box clamp base (21). The winding lead wire and the sensor lead wire are soldered parallel to the terminal of the junction box socket (6). The winding lead and sensor lead passing through the junction box clamp assembly (2) are vertical leads. The solder joint sealing cover (4) is inserted into the winding lead and sensor lead. The winding lead and sensor lead are welded to the junction box socket (6). The solder joint sealing cover (4) is installed on the solder joint between the junction box socket (6) and the lead, so that the rear end cover leads are sealed.

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