Main lead device for hydroelectric generator

Abstract

The utility model provides a device for water turbine generator main lead-out line, including stator, ring wall and a plurality of closed bus, stator periphery is equipped with stator base, is equipped with a plurality of copper ring on stator base, ring wall inside is equipped with a plurality of connecting device, is equipped with soft connection between connecting device and copper ring, is equipped with arc frame on ring wall, and closed bus penetrates on arc frame. Soft connection both ends are connected with copper ring and connecting device respectively, and the connection and disconnection are quick, and it is convenient for staff operation, saves overhaul time, and can disconnect closed bus and copper ring during overhauling, to reduce hoisting difficulty. Soft connection simple and reliable structure, enough better adaptation unit long -term operation vibration, avoid the fracture of the stress fatigue of soft connection. Arc frame can shield main lead-out line area large current strong magnetic field, avoid the adverse effects, such as overheat, of foundation reinforcement and carbon steel metal parts on machine pit ring wall due to induction.

Description

Technical Field

[0001] This utility model relates to the field of hydro-generators, and in particular to a device for the main lead-out line of a hydro-generator. Background Technology

[0002] The main lead-out device of a hydro-generator is a core component for connecting the hydro-generator to the power grid. One end of it is connected to the stator winding (copper ring), and the other end is connected to the enclosed busbar. The main lead-out device of a hydro-generator mainly includes lead-out wires, clamps, and terminals.

[0003] However, the existing generator main lead wires are soldered to the copper ring and cannot be disassembled. This makes stator lifting more difficult during major generator overhauls, and also restricts the maintenance and lifting of the air cooler below. During the lifting process, extra consideration must be given to avoid damage such as pulling and collisions, which increases the complexity and difficulty of the lifting operation. It also requires a larger lifting space and more precise lifting control.

[0004] The unit uses a traditional multi-layer copper sheet connection. During long-term operation, this type of connection suffers from copper sheet fatigue, leading to breakage and potential grounding or phase-to-phase short circuits, posing a safety hazard. Furthermore, the main lead-out area is a high-current, strong magnetic field region. The foundation steel reinforcement and carbon steel components near the main lead-out openings on the pit wall will experience induced overheating during operation, accelerating aging and damage to the metal components and increasing the risk of fire. Utility Model Content

[0005] This utility model provides a device for the main lead wire of a hydro generator, which solves the problems of the lead wire being silver-welded to the copper ring as a whole, making it impossible to disassemble, which would increase the difficulty of hoisting the stator during the overhaul of the unit and restrict the maintenance and hoisting of the air cooler below; the multi-layer copper sheet connection is prone to breakage during operation, posing a safety hazard; and the induced overheating near the opening of the lead wire increases the risk of fire.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a main lead-out device for a hydro-generator, including a stator, an annular wall and multiple enclosed busbars. A stator base is provided around the stator, and multiple copper rings are provided on the stator base. Multiple connecting devices are provided inside the annular wall, and a flexible connection is provided between the connecting devices and the copper rings. An arc-shaped frame is provided on the annular wall, and the enclosed busbars pass through the arc-shaped frame.

[0007] In the preferred embodiment, the stator base is provided with copper ring supports, and multiple copper rings are installed on the copper ring supports.

[0008] In a preferred embodiment, the flexible connection includes a busbar, with terminals at both ends of the busbar. A stop block is provided at the bottom of the terminal, and multiple through holes are provided on the terminal. Multiple third through holes are provided on the stop block, and positioning bolts are provided on the through holes.

[0009] In the preferred embodiment, one end of the copper ring is provided with a connector, which abuts against the terminal block at one end of the busbar and the stop block, and the top of the terminal block is provided with a stop washer.

[0010] In a preferred embodiment, the wiring device includes a support frame, on which a hollow rectangular frame is provided, and the rectangular frame is provided with multiple second through holes, and the terminal block at one end of the flexible connector is connected to the rectangular frame.

[0011] In the preferred embodiment, a second positioning bolt is provided on the second through hole, and the support frame is installed on the inner side of the ring wall.

[0012] In a preferred embodiment, the ring wall is provided with multiple through slots, and the arc frame is installed on the through slots. The arc frame includes two opposing side plates, and two arc plates are provided between the two side plates. The two arc plates and the two side plates abut against the through slots.

[0013] In the preferred embodiment, the arc-shaped frame includes two side frames with mounting holes on them, through which the closed busbar passes.

[0014] The beneficial effects of this utility model are as follows: When overhauling the lower air cooler, the two ends of the flexible connection are disassembled in advance to disconnect the copper ring and the connecting device, and to disconnect the enclosed busbar and the copper ring. The two ends of the flexible connection are respectively connected to the copper ring and the connecting device. The connection and disassembly are quick, which is convenient for the staff to operate and saves maintenance time. During maintenance, the enclosed busbar and the copper ring can be disconnected to reduce the difficulty of lifting and avoid damage such as pulling and collision during the lifting process. The complexity of the lifting operation is reduced, and the lifting space is greatly saved and the lifting difficulty is reduced.

[0015] The flexible connection has a simple and reliable structure. The busbar is made of tin-plated copper braided wire, and terminals are provided at both ends of the busbar to enable the flexible connection to adapt well to the vibration of the unit during long-term operation and avoid the flexible connection from breaking due to stress fatigue.

[0016] The arc-shaped frame is made of aluminum, and the enclosed busbar is installed inside the arc-shaped frame. The arc-shaped frame can shield the large current and strong magnetic field in the main lead area, and avoid adverse effects such as overheating of the foundation steel bars and carbon steel metal parts on the pit ring wall due to induction. It ensures the operating environment and performance of the equipment and has great promotional value. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a top view of the overall structure of this utility model; Figure 2 This is a utility model Figure 1 Sectional view of AA; Figure 3This is a side view of the copper ring and flexible connector of this utility model; Figure 4 This is a top view of the copper ring and flexible connector of this utility model; Figure 5 This is a utility model Figure 2 Sectional view of DD; Figure 6 This is an axonometric view of the arc-shaped frame of this utility model; In the diagram: 1. Stator; 2. Stator base; 3. Copper ring support; 4. Copper ring; 5. Connector; 6. Flexible connection; 601. Busbar; 602. Terminal block; 603. Through hole; 604. Stop washer; 605. Positioning bolt; 606. Connection device; 7. Support frame; 701. Rectangular frame; 702. Second through hole; 703. Enclosed busbar; 9. Arc frame; 901. Side plate; 902. Arc plate; 903. Side frame; 904. Mounting hole; 10. Ring wall. Detailed Implementation

[0018] Example 1: like Figure 1-6 The main lead-out device for a hydro-generator includes a stator 1, an annular wall 10, and multiple enclosed busbars 8. A stator base 2 surrounds the stator 1, and multiple copper rings 4 are mounted on the stator base 2. Multiple connecting devices 7 are located inside the annular wall 10, with flexible connections 6 between the connecting devices 7 and the copper rings 4. An arc-shaped frame 9 is mounted on the annular wall 10, and the enclosed busbars 8 pass through the arc-shaped frame 9. With this structure, when overhauling the lower air cooler, both ends of the flexible connection 6 are pre-disconnected to break the connection between the copper rings 4 and the connecting devices 7, and to break the connection between the enclosed busbars 8 and the copper rings 4. The two ends of the flexible connection 6 are then connected to the copper rings 4 and the connecting devices 7 respectively. This allows for quick connection and disassembly, facilitating operation and saving maintenance time. During maintenance, the enclosed busbars 8 and copper rings 4 can be disconnected, reducing lifting difficulty and preventing damage from pulling or collisions during lifting. This reduces the complexity of lifting operations and also significantly saves lifting space and eases lifting difficulty.

[0019] The flexible connection 6 has a simple and reliable structure. The busbar 601 is made of tin-plated copper braided wire, and the two ends of the busbar 601 are equipped with terminals 602 so that the flexible connection 6 can better adapt to the vibration of the unit during long-term operation and avoid the flexible connection from breaking due to stress fatigue.

[0020] The arc-shaped frame 9 is made of aluminum, and the enclosed busbar 8 is installed inside the arc-shaped frame 9. The arc-shaped frame 9 can shield the large current and strong magnetic field in the main lead area, and avoid adverse effects such as overheating of the foundation steel bars and carbon steel metal parts on the pit ring wall 10 due to induction, thus ensuring the operating environment and performance of the equipment.

[0021] In the preferred embodiment, a copper ring support 3 is provided on the stator base 2, and multiple copper rings 4 are installed on the copper ring support 3. With this structure, the copper ring support 3 includes a clamp, a support structure, and insulating material. The copper rings 4 are connected to one end of the flexible connector 6, allowing for convenient assembly and disassembly during the lifting of the air cooler or the entire stator, eliminating the limitations imposed by the main lead-out device on lifting. The busbar 601 of the flexible connector 6 is made of tin-plated copper braided wire, and the terminal block 602 is made of copper and is silver-plated on both sides.

[0022] In a preferred embodiment, the flexible connector 6 includes a busbar 601, with terminals 602 at both ends. Each terminal 602 has a stop block 603 at its bottom, multiple through holes 604 on its surface, and multiple third through holes on its stop block 603. Positioning bolts 606 are mounted on the through holes 604. With this structure, the busbar 601 of the flexible connector 6 is made of tin-plated copper braided wire, and the terminals 602 are made of copper and are silver-plated on both sides.

[0023] The flexible connection 6 has a simple and reliable structure. The busbar 601 is made of tin-plated copper braided wire, and the two ends of the busbar 601 are equipped with terminals 602 so that the flexible connection 6 can better adapt to the vibration of the unit during long-term operation and avoid the flexible connection from breaking due to stress fatigue.

[0024] In the preferred embodiment, one end of the copper ring 4 is provided with a connector 5, which abuts against the terminal 602 and the stop block 603 at one end of the busbar 601. The terminal 602 is provided with a stop washer 605 on its top. In this structure, the connector 5 is made of copper, and the connector 5 is connected to the flexible connection 6 by a positioning bolt 606. The copper ring 4 and the connector 5 are connected by soldering.

[0025] In a preferred embodiment, the wiring device 7 includes a support frame 701, on which a hollow rectangular frame 702 is provided. The rectangular frame 702 has multiple second through holes 703. The terminal 602 at one end of the flexible connector 6 is connected to the rectangular frame 702. With this structure, the support frame 701 is installed on the inner wall of the annular wall 10, and the rectangular frame 702 is installed on top of the support frame 701. The rectangular frame 702 includes four rectangular blocks connected end-to-end. Each rectangular block has multiple second through holes 703. The positioning bolt 606 at one end of the flexible connector 6 abuts against the second through hole 703, and the terminal 602 at one end of the flexible connector 6 abuts against the rectangular block, thereby connecting one end of the flexible connector 6 to the rectangular frame 702 and thus connecting one end of the flexible connector 6 to the wiring device 7.

[0026] In the preferred embodiment, a second positioning bolt is provided on the second through hole 703, and the support frame 701 is installed on the inner side of the ring wall 10.

[0027] In a preferred embodiment, the annular wall 10 has multiple through slots, and the arc-shaped frame 9 is mounted on the through slots. The arc-shaped frame 9 includes two opposing side plates 901, and two arc-shaped plates 902 are disposed between the two side plates 901. All two arc-shaped plates 902 and the two side plates 901 abut against the through slots. With this structure, the two arc-shaped plates 902 and the two side plates 901 abut against the through slots, and the closed busbar 8 passes through the arc-shaped frame 9. The arc-shaped frame 9 is made of aluminum plate and serves as a shield. It is pre-fabricated and then welded together on-site. The arc-shaped frame 9 shields the main lead-out line area from high current and strong magnetic fields, preventing overheating of the foundation steel bars and carbon steel metal parts on the pit ring wall 10 due to induction, thus ensuring the equipment's operating environment and performance.

[0028] In a preferred embodiment, the arc-shaped frame 9 includes two side frames 903, each with a mounting hole 904 through which the enclosed busbar 8 passes. With this structure, one side frame 903 abuts against the inner wall of the annular wall 10, and the other side frame 903 abuts against the outer wall of the annular wall 10. The enclosed busbar 8 includes a copper rod and an enclosed busbar connector; one end of the copper rod is connected to a rectangular frame 702, which is made of copper.

[0029] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A device for the main lead-out line of a hydroelectric generator, characterized in that: It includes a stator (1), an annular wall (10) and multiple enclosed busbars (8). The stator (1) is surrounded by a stator base (2), and multiple copper rings (4) are provided on the stator base (2). Multiple connecting devices (7) are provided on the inner side of the annular wall (10). A flexible connection (6) is provided between the connecting device (7) and the copper ring (4). An arc-shaped frame (9) is provided on the annular wall (10), and the enclosed busbars (8) pass through the arc-shaped frame (9).

2. The device for the main lead-out line of a hydro-generator according to claim 1, characterized in that: A copper ring support (3) is provided on the stator base (2), and multiple copper rings (4) are installed on the copper ring support (3).

3. The device for the main lead-out line of a hydro-generator according to claim 1, characterized in that: The flexible connection (6) includes a busbar (601), both ends of the busbar (601) are provided with terminals (602), the bottom of the terminals (602) is provided with a stop block (603), the terminals (602) are provided with multiple through holes (604), the stop block (603) is provided with multiple third through holes, and the through holes (604) are provided with positioning bolts (606).

4. The device for the main lead-out line of a hydro-generator according to claim 3, characterized in that: The copper ring (4) has a connector (5) at one end. The connector (5) abuts against the terminal (602) and the stop block (603) at one end of the busbar (601). The terminal (602) has a stop washer (605) on top.

5. The device for the main lead-out line of a hydro-generator according to claim 1, characterized in that: The wiring device (7) includes a support frame (701), on which a hollow rectangular frame (702) is provided. The rectangular frame (702) is provided with multiple second through holes (703). The terminal block (602) at one end of the flexible connector (6) is connected to the rectangular frame (702).

6. The device for the main lead-out line of a hydro-generator according to claim 5, characterized in that: The second through hole (703) is provided with a second positioning bolt, and the support frame (701) is installed on the inner side of the ring wall (10).

7. The device for the main lead-out line of a hydro-generator according to claim 1, characterized in that: The ring wall (10) is provided with multiple through slots, and the arc frame (9) is installed on the through slots. The arc frame (9) includes two opposite side plates (901), and two arc plates (902) are provided between the two side plates (901). The two arc plates (902) and the two side plates (901) all abut against the through slots.

8. The device for the main lead-out line of a hydro-generator according to claim 1, characterized in that: The arc frame (9) includes two side frames (903), and the side frames (903) are provided with mounting holes (904), through which the enclosed busbar (8) passes.

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