Million-kilowatt quadrupole nuclear turbine generator rotor lead and wiring method

Abstract

The invention relates to the field of motor manufacturing, and discloses a rotor lead wiring method for a million-kilowatt nuclear power turbonator, the million-kilowatt nuclear power turbonator adopts a quadrupole design, and comprises a conducting rod connecting module, an auxiliary connecting module, a rotating shaft body module, an inter-pole connecting module and a rotor outgoing line which are connected with one another. And a complete rotor outgoing line wiring is completed. Complicated connection among four magnetic poles can be solved, maximum-area electric connection is achieved, centrifugal force is overcome by means of axial pressure, and compared with a conventional motor wiring method, the motor wiring method is convenient in overall installation and better in heat dissipation effect.

Description

Technical Field

[0001] The invention relates to the field of generator rotors, and in particular to a million-kilowatt-class four-pole nuclear power steam turbine generator rotor lead and a wiring method. Background Art

[0002] Nuclear power steam turbine generators have the advantages of high energy density, low overall cost, clean and efficient, and pollution-free. They are an important component of the national energy strategic deployment. In recent years, orders for million-kilowatt nuclear power steam turbine generators have surged, and domestic and foreign demand has increased. In order to meet market demand and adapt to the needs of new power systems, we have independently developed and designed a million-kilowatt nuclear power steam turbine generator with better performance.

[0003] In the manufacture of generators, the fixing and wiring method of the rotor lead is very important. It is necessary to ensure the reliable operation of the motor and to meet the convenience of process installation. At the same time, its stress condition must also be considered. The generator rotor lead is used to connect the rotor excitation winding and the lead screw. Conventional thermal power steam turbine generator motors mostly adopt a two-pole design with two magnetic poles. The two magnetic poles are connected by an inter-pole connecting wire. The two-pole rotor inter-pole connecting wire can be directly connected to the rotor coil copper bar. The air intake of the steam turbine of the million-kilowatt nuclear power project exceeds that of the conventional unit, and the blade diameter is large. Due to strength restrictions, the speed needs to be reduced. In order to input 50Hz AC power to the steam turbine generator set, the steam turbine adopts a half-speed design, and the corresponding generator adopts a four-pole design, which has four magnetic poles and a relatively complex inter-pole connection structure. Due to its limited spatial position, the inter-pole connecting wire cannot be directly connected to the rotor coil copper bar. Therefore, a new rotor lead wiring method suitable for million-kilowatt four-pole nuclear power steam turbine generator is urgently needed. Summary of the invention

[0004] The purpose of the present invention is to disclose a million-kilowatt-class four-pole nuclear power steam turbine generator rotor lead and wiring method to solve the problems of complex inter-pole connection structure, limited spatial position, and the inability of the inter-pole connection wire to be directly connected to the rotor coil copper bar in the above background.

[0005] The technical solution of the present invention is: a rotor lead of a million-kilowatt nuclear power steam turbine generator, which is composed of a conductive rod connection module, an auxiliary connection module, a rotating shaft body module, an inter-pole connection module and a rotor lead. The conductive rod connection module is arranged in a straight line with the rotating shaft at a 180° direction. The conductive rod connection module is based on the conductive rod. The conductive rod connection module is composed of a conductive rod and a lead screw. The conductive rod is radially connected to the lead screw, and the lead screw is threadedly connected to the rotor lead to complete the connection of the conductive rod connection module.

[0006] In the above-mentioned million-kilowatt nuclear power steam turbine generator rotor lead, the auxiliary connection module is composed of an insulating pad, a lead pressure plate and a fixed clamp. The rotor lead is provided with an insulating pad from bottom to top, and the insulating pad is connected to the lead pressure plate from bottom to top. The insulating pad and the right side of the lead pressure plate are connected to the fixed clamp to complete the connection of the auxiliary connection module.

[0007] In the above-mentioned million-kilowatt nuclear power steam turbine generator rotor lead, the shaft body module is composed of a rotor lead slot wedge and a shaft. The rotor lead wire is in the rotor lead slot wedge, and the insulating pad, lead pressure plate and fixing clamp of the auxiliary connection module form a 360° overall wrap around the fixed rotor lead wire to complete the shaft body module connection.

[0008] In the above-mentioned million-kilowatt nuclear power steam turbine generator rotor lead, the inter-pole connection module is composed of magnetic pole A, magnetic pole B, magnetic pole C, magnetic pole D, inter-pole connecting wires, coil-side inter-pole connecting wires and lead-side inter-pole connecting wires. Magnetic pole A and magnetic pole B, magnetic pole C and magnetic pole D are circumferentially connected through the coil-side inter-pole connecting wires, and magnetic pole B and magnetic pole C, magnetic pole D and magnetic pole A are circumferentially connected through the lead-side inter-pole connecting wires.

[0009] Since the inter-pole connection wire cannot be directly connected to the rotor coil copper bar, the rotor lead wire is led out to the end of the shaft body and then rotated 45° around the shaft to realize the series connection of the magnetic poles of the inter-pole connection module and complete the connection between the rotor lead wire and the inter-pole connection module.

[0010] A method for connecting rotor leads of a million-kilowatt nuclear power steam turbine generator is implemented by the following steps:

[0011] Step 1: Use cleaning tools to ensure that the surfaces of the conductive rod connection module, auxiliary connection module, shaft body module and inter-electrode connection module are clean, flat, smooth and free of foreign matter and protrusions;

[0012] Step 2: Connect the conductive rod to the lead screw from bottom to top. The rotor lead wire is used to connect the rotor excitation winding and the lead screw. Connect one end of the rotor lead wire to the rotor excitation winding and the other end to the lead screw by threading to complete the connection of the conductive rod connection module.

[0013] Step 3, after the rotor lead wire is threadedly connected with the lead screw, the rotor lead wire is placed in the rotor lead slot wedge, the rotor lead wire is provided with an insulating pad from bottom to top, the insulating pad is connected to the lead pressing plate from bottom to top, the insulating pad and the right side of the lead pressing plate are connected to the fixed clamping plate, and the connection of the auxiliary connection module is completed;

[0014] Step 4: After the auxiliary connection module is completed, the rotor lead wire is wrapped 360° as a whole with the rotor lead wire slot wedge, the shaft body and the insulating pad of the auxiliary connection module, the lead wire pressing plate and the fixing clamping plate, the rotor lead wire is fixed, and the connection of the shaft body module is completed;

[0015] Step 5: After the connection between the rotor lead wire and the shaft body module is completed, one end of the rotor lead wire is connected to the rotor excitation winding, and the rotor lead wire is connected to the rotor excitation winding through four sets of inter-pole connecting wires;

[0016] Step 6: Circumferentially connect the magnetic poles A and B, and the magnetic poles C and D of the rotor excitation winding through the inter-pole connecting wire on the coil side, and circumferentially connect the magnetic poles B and C, and the magnetic poles D and A through the inter-pole connecting wire on the lead side, thereby completing the connection of the inter-pole connection module;

[0017] Step 7. When the rotor lead wire is connected to the inter-pole connecting wire, due to the space limitation of the four-pole rotor, the inter-pole connecting wire cannot be directly connected to the rotor coil copper bar. Usually, the coil is first led out to the end of the shaft body, and then the rotor lead wire is rotated 45° around the shaft to achieve complete wiring of the rotor lead wire.

[0018] The beneficial effects of the present invention are:

[0019] 1. The million-kilowatt-class four-pole nuclear steam turbine generator rotor lead and wiring method of the present invention can realize the complex connection of four-pole magnetic poles. The coil is usually led out to the end of the rotating shaft, and then the lead-side inter-pole connecting wire is rotated 45° around the rotating shaft and connected in series with the coil magnetic poles, which can realize the maximum area electrical connection and solve the problem of complex connection of four-pole magnetic pole coils.

[0020] 2. In the million-kilowatt-class four-pole nuclear power steam turbine generator rotor lead wire and wiring method of the present invention, the rotor lead wire is arranged in the rotor lead wire slot wedge, and the rotor lead wire is reliably fixed by insulating pads, lead wire pressure plates and fixed clamps. At the same time, the centrifugal force is overcome by axial pressure, which can ensure the reliable fixation of the rotor lead wire.

[0021] 3. The rotor lead wire and wiring method of the million-kilowatt-class four-pole nuclear steam turbine generator in the present invention are located in the rotor lead wire slot wedge, and its installation only requires pushing the lead wire into the slot wedge, which is easy to install. At the same time, the rotor lead wire is led to the end of the shaft to complete the connection between the poles, which can solve the problem of limited spatial position. Compared with the conventional motor wiring method, the rotor lead wire wiring method is easy to install as a whole and has better heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a diagram of the rotor winding arrangement of a million-kilowatt-class four-pole nuclear power steam turbine generator;

[0023] Figure 2 This is a layout diagram of the inter-pole connection modules of a million-kilowatt-class four-pole nuclear power steam turbine generator;

[0024] Figure 3 This is an assembly diagram of the rotor lead wire and wiring method of a million-kilowatt-class four-pole nuclear power steam turbine generator;

[0025] Figure 4 This is an assembly diagram of an auxiliary connection module for a million-kilowatt quadrupole nuclear power steam turbine generator;

[0026] Figure 5 A schematic diagram of a rotor lead wire and wiring method of a million-kilowatt-class four-pole nuclear power steam turbine generator;

[0027] Figure 6 A schematic diagram of the inter-pole connection line of a rotor of a million-kilowatt-class four-pole nuclear power steam turbine generator;

[0028] Description of component numbers in the accompanying drawings:

[0029] 100. Conductive rod connection module; 200. Auxiliary connection module; 300. Rotating shaft body module; 400. Inter-pole connection module; 500. Rotor lead wire; 1. Pole A; 2. Pole B; 3. Pole C; 4. Pole D; 6. Inter-pole connection wire; 6-1. Inter-pole connection wire on the coil side; 6-2. Inter-pole connection wire on the lead side; 7. Rotor lead slot wedge; 8. Rotating shaft; 9. Conductive rod; 10. Lead screw; 11. Insulating spacer; 12. Lead pressure plate; 13. Fixing splint. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solution of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Specific implementation plan 1: Figure 1 , 2As shown in Figures 3, 4 and 5, a method for connecting rotor leads of a million-kilowatt nuclear steam turbine generator is provided, which comprises a conductive rod connection module 100, an auxiliary connection module 200, a shaft body module 300, an inter-pole connection module 400 and a rotor lead-out wire 500. The conductive rod connection module 100 is arranged in a straight line with the shaft 8 at a direction of 180°. The conductive rod module 100 is radially connected to the rotor lead-out wire 500. The rotor lead-out wire 500 is fixed to the shaft 8 body by the auxiliary connection module 200. The shaft body module 300 is integrally wrapped and connected with the rotor lead-out wire 500. The inter-pole connection wire 6 cannot be directly connected to the rotor coil copper bar. The rotor lead-out wire 500 is led out to the end of the shaft 8 body, and then rotated 45° around the shaft 8 in the circumferential direction to realize the magnetic pole series connection of the inter-pole connection module 300, and complete the connection between the rotor lead-out wire 500 and the inter-pole connection module 300.

[0032] Specific implementation scheme 2: This implementation scheme further defines the conductive rod connection module 100 described in specific implementation scheme 1. Figure 5 As shown, in this embodiment, the conductive rod connection module 100 is composed of a conductive rod 9 and a lead screw 10. The conductive rod connection module 100 takes the conductive rod 9 as the main body. The conductive rod 9 is radially connected to the lead screw 10, and the lead screw 10 is threadedly connected to the rotor lead wire 500 to complete the connection of the conductive rod connection module 100.

[0033] Specific implementation scheme three: This implementation scheme further defines the auxiliary connection module 200 described in specific implementation scheme one. Figure 3 , 4 As shown, in this embodiment, the auxiliary connection module 200 is composed of an insulating spacer 11, a lead pressure plate 12 and a fixed clamp 13. The rotor lead wire 500 is provided with an insulating spacer 11 from bottom to top. The insulating spacer 11 is connected to the lead pressure plate 12 from bottom to top. The insulating spacer 11 and the right side of the lead pressure plate 12 are connected to the fixed clamp 13 to complete the connection of the auxiliary connection module 200.

[0034] Specific implementation scheme 4: This implementation scheme further defines the shaft body module 300 described in specific implementation scheme 1. Figure 3 , 4 As shown, in this embodiment, the shaft body module 300 is composed of a rotor lead slot wedge 7 and a shaft 8. The rotor lead wire 500 is in the rotor lead slot wedge 7, and the auxiliary connection module 200 has an insulating pad 11, a lead pressure plate 12 and a fixing clamp 13, which surround and fix the rotor lead wire 500 as a whole at 360°, thereby completing the connection of the shaft body module 300.

[0035] Specific implementation scheme 5: This implementation scheme further defines the inter-electrode connection module 400 described in specific implementation scheme 1. Figure 1 , 2As shown in Figure 6, in this embodiment, the inter-pole connection module 400 is composed of a magnetic pole A1, a magnetic pole B2, a magnetic pole C3, a magnetic pole D4, an inter-pole connecting wire 6, a coil side inter-pole connecting wire 6-1 and a lead side inter-pole connecting wire 6-2. The magnetic pole A1 is circumferentially connected to the magnetic pole B2 through the coil side inter-pole connecting wire 6-1, the magnetic pole B2 is circumferentially connected to the magnetic pole C3 through the lead side inter-pole connecting wire 6-2, the magnetic pole C3 is circumferentially connected to the magnetic pole D4 through the coil side inter-pole connecting wire 6-1, and the magnetic pole D4 is circumferentially connected to the magnetic pole A1 through the lead side inter-pole connecting wire 6-2.

[0036] Specific implementation scheme 5: This implementation scheme is a step description of a method for connecting rotor leads of a million-kilowatt nuclear power steam turbine generator in specific implementation scheme 1. In this implementation scheme:

[0037] Step 1: Use a cleaning tool to ensure that the surfaces of the conductive rod connection module 100, the auxiliary connection module 200, the shaft body module 300 and the inter-electrode connection module 400 are clean, flat, smooth and free of foreign matter and protrusions;

[0038] Step 2, connect the conductive rod 9 with the lead screw 10 from bottom to top, the rotor lead wire 500 is used to connect the rotor excitation winding and the lead screw 10, connect one end of the rotor lead wire 500 with the rotor excitation winding and the other end with the lead screw 10 by threading, and complete the connection of the conductive rod connection module 100;

[0039] Step 3, after the rotor lead wire 500 is threadedly connected with the lead screw 10, the rotor lead wire 500 is placed in the rotor lead slot wedge 7, and the rotor lead wire 500 is provided with an insulating pad 11 from bottom to top, and the insulating pad 11 is connected to the lead pressing plate 12 from bottom to top, and the right side of the insulating pad 11 and the lead pressing plate 12 is connected to the fixing clamp 13, and the connection of the auxiliary connection module 200 is completed;

[0040] Step 4: After the auxiliary connection module 200 is completed, the rotor lead wire 500 is wrapped 360° by the rotor lead wire slot wedge 7, the shaft 8 body and the insulating pad 11, the lead wire pressing plate 12 and the fixing clamping plate 13 of the auxiliary connection module 200, the rotor lead wire 500 is fixed, the centrifugal force is overcome by shaft pressure, and the connection of the shaft body module 300 is completed;

[0041] Step 5: After the rotor lead wire 500 is connected to the shaft body module 300, one end of the rotor lead wire 500 is connected to the rotor excitation winding. The rotor lead wire 500 is connected to the rotor excitation winding through four sets of inter-pole connecting wires 6;

[0042] Step 6: Circumferentially connect the magnetic poles A1 and B2, and the magnetic poles C3 and D4 of the rotor excitation winding through the coil-side inter-pole connecting wire 6-1, and circumferentially connect the magnetic poles B2 and C3, and the magnetic poles D4 and A1 through the lead-side inter-pole connecting wire 6-2, to complete the connection of the inter-pole connection module 400, which can solve the problem of complex connection of the four-pole magnetic poles and the problem of limited space of the four-pole rotor;

[0043] Step 7, when the rotor lead wire 500 is connected to the inter-pole connecting wire 6, due to the space limitation of the four-pole rotor, the inter-pole connecting wire 6 cannot be directly connected to the rotor coil copper bar. Usually, the coil is first led out to the end of the rotating shaft 8, and then the rotor lead wire 500 is rotated 45° around the rotating shaft 8 to achieve complete wiring of the rotor lead wire 500.

[0044] Finally, the protection scope of the present invention is not limited to the above-mentioned embodiments. Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the scope and spirit of the present invention. If these changes and modifications fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these changes and modifications.

Claims

1. A rotor lead wire for a million-kilowatt nuclear power steam turbine generator, characterized in that: The invention comprises a conductive rod connection module (100), an auxiliary connection module (200), a rotating shaft body module (300), an inter-pole connection module (400), and a rotor lead wire (500). The conductive rod connection module (100) is arranged in a straight line with the rotating shaft (8) at a direction of 180°. The conductive rod module (100) is radially connected to the rotor lead wire (500). The rotor lead wire (500) is fixed to the rotating shaft (8) body by means of the auxiliary connection module (200). The rotating shaft body module (300) and the rotor lead wire (500) are integrally wrapped and connected. The inter-pole connection wire (6) leads the rotor lead wire (500) to the end of the rotating shaft (8) body, and then rotates 45° around the rotating shaft (8) to realize the magnetic pole series connection of the inter-pole connection module (300).

2. A million-kilowatt nuclear power steam turbine generator rotor lead according to claim 1, characterized in that: The conductive rod connection module (100) is composed of a conductive rod (9) and a lead screw (10). The conductive rod connection module (100) takes the conductive rod (9) as a main body, the conductive rod (9) is radially connected to the lead screw (10), and the lead screw (10) is threadedly connected to the rotor lead wire (500).

3. A million-kilowatt nuclear power steam turbine generator rotor lead according to claim 1, characterized in that: The auxiliary connection module (200) is composed of an insulating pad (11), a lead pressing plate (12) and a fixed clamping plate (13); the rotor lead wire (500) is provided with an insulating pad (11) from bottom to top; the insulating pad (11) is connected to the lead pressing plate (12) from bottom to top; and the right sides of the insulating pad (11) and the lead pressing plate (12) are connected to the fixed clamping plate (13).

4. A million-kilowatt nuclear power steam turbine generator rotor lead according to claim 1, characterized in that: The shaft body module (300) is composed of a rotor lead slot wedge (7) and a shaft (8); the rotor lead wire (500) is in the rotor lead slot wedge (7) and is integrally surrounded and fixed by an insulating pad (11), a lead pressing plate (12) and a fixing clamp (13) of the auxiliary connection module (200) at 360°.

5. The rotor lead wire of a million-kilowatt nuclear power steam turbine generator according to claim 1, characterized in that: The inter-pole connection module (400) is composed of a magnetic pole A (1), a magnetic pole B (2), a magnetic pole C (3), a magnetic pole D (4), an inter-pole connection line (6), a coil-side inter-pole connection line (6-1) and a lead-side inter-pole connection line (6-2); the magnetic pole A (1) is circumferentially connected to the magnetic pole B (2) via the coil-side inter-pole connection line (6-1); the magnetic pole B (2) is circumferentially connected to the magnetic pole C (3) via the lead-side inter-pole connection line (6-2); the magnetic pole C (3) is circumferentially connected to the magnetic pole D (4) via the coil-side inter-pole connection line (6-1); and the magnetic pole D (4) is circumferentially connected to the magnetic pole A (1) via the lead-side inter-pole connection line (6-2).

6. A method for connecting rotor leads of a million-kilowatt nuclear power steam turbine generator as claimed in any one of claims 1 to 5, characterized in that: The usage process is as follows: Step 1: Use a cleaning tool to ensure that the surfaces of the conductive rod connection module (100), the auxiliary connection module (200), the shaft body module (300), the inter-pole connection module (400) and the rotor lead wire (500) are clean, flat, smooth and free of foreign matter and protrusions; Step 2: Connect the conductive rod (9) and the lead screw (10) from bottom to top. The rotor lead wire (500) is used to connect the rotor excitation winding and the lead screw (10). One end of the rotor lead wire (500) is connected to the rotor excitation winding and the other end is threadedly connected to the lead screw (10), thereby completing the connection of the conductive rod connection module (100); Step 3, after the rotor lead wire (500) is threadedly connected to the lead screw (10), the rotor lead wire (500) is placed in the rotor lead slot wedge (7), and the rotor lead wire (500) is provided with an insulating pad (11) from bottom to top, and the insulating pad (11) is connected to the lead pressing plate (12) from bottom to top, and the right side of the insulating pad (11) and the lead pressing plate (12) is connected to the fixing clamp (13), thereby completing the connection of the auxiliary connection module (200); Step 4: After the auxiliary connection module (200) is completed, the rotor lead wire (500) is wrapped 360° as a whole with the rotor lead wire slot wedge (7), the shaft (8) body and the insulating pad (11), the lead wire pressing plate (12) and the fixing clamp (13) of the auxiliary connection module (200), the rotor lead wire (500) is fixed, and the connection of the shaft body module (300) is completed; Step 5: After the rotor lead wire (500) is connected to the shaft body module (300), one end of the rotor lead wire (500) is connected to the rotor excitation winding. The rotor lead wire (500) is connected to the rotor excitation winding through four sets of inter-pole connecting wires (6); Step 6, the magnetic poles A (1) and B (2), and the magnetic poles C (3) and D (4) of the rotor excitation winding are circumferentially connected via the coil-side inter-pole connecting wire (6-1), and the magnetic poles B (2) and C (3), and the magnetic poles D (4) and A (1) are circumferentially connected via the lead-side inter-pole connecting wire (6-2), thereby completing the connection of the inter-pole connection module (400); Step 7: When the rotor lead wire (500) is connected to the inter-pole connecting wire (6), due to the space limitation of the four-pole rotor, the inter-pole connecting wire (6) cannot be directly connected to the rotor coil copper bar. Usually, the coil is first led out to the end of the rotating shaft (8), and then the rotor lead wire (500) is rotated 45° around the rotating shaft (8) to achieve complete wiring of the rotor lead wire (500).

Images