Modularized split type journal sticking generator junction box

Abstract

The utility model relates to the technical field of generator junction boxes, in particular to a modular split type journal sticking generator junction box which comprises at least two module generator junction boxes arranged side by side in the first direction, and each module generator junction box comprises a first split junction box and a second split junction box. Four circuit breakers are arranged in the first split junction box, and two circuit breakers are arranged in the second split junction box. And a first threading pipe and a second threading pipe are arranged between the first split junction box and the second split junction box and are respectively communicated with the first split junction box and the second split junction box. The first circuit breaker copper bar is connected with each circuit breaker through a fixed copper bar, and the star point circuit breaker copper bar is connected with the star point connecting copper bar and the star point circuit breaker. The wiring modes of the two junction boxes on each module generator are the same, and only U, V, W and star points exist externally. By using the modularized split type generator junction box, the capacity increase and the capacity reduction of a journal sticking module generator can be more convenient, and a fault module can be rapidly tested and cut off.

Description

Technical Field

[0001] The present invention relates to the technical field of generator junction boxes, and more particularly to a modular split-flap shaft-enclosed generator junction box. Background Art

[0002] The traditional modular split-type generator junction box has cumbersome wiring and is prone to wiring errors, and also brings inconvenience to the fault measurement of a single unit generator during use. Summary of the Invention

[0003] In order to simplify the on-site wiring of a modular split-type shaft-holding generator, realize the rapid separation of unit connections during a fault process, and find the faulty unit generator, the present invention provides a modular split-type shaft-holding generator terminal box.

[0004] To achieve the above-mentioned object, the present invention provides a modular split-flap shaft-enclosed generator terminal box, comprising at least two modular generator terminal boxes arranged side by side along a first direction, each modular generator terminal box including a first split-flap terminal box and a second split-flap terminal box; the second split-flap terminal box and the first split-flap terminal box are arranged side by side in a second direction, the second direction being perpendicular to the first direction; a first wire threading tube is configured to connect the first split-flap terminal box and the second split-flap terminal box; a second wire threading tube is configured to connect the first split-flap terminal box and the second split-flap terminal box, and is arranged side by side with the first wire threading tube in the first direction;

[0005] The first split junction box includes a first circuit breaker, a second circuit breaker, a fixed copper busbar, a third circuit breaker, and a fourth circuit breaker arranged in a quadrilateral; the first circuit breaker and the third circuit breaker are arranged side by side with the second wire conduit in the second direction, and the second circuit breaker and the fourth circuit breaker are arranged side by side with the first wire conduit in the second direction;

[0006] The second split junction box includes a fifth circuit breaker, a sixth circuit breaker, and a star point circuit breaker distributed in a triangular shape; the fifth circuit breaker and the second wire threading tube are arranged side by side in the second direction, and the sixth circuit breaker and the first wire threading tube are arranged side by side in the second direction;

[0007] The third circuit breaker, the fourth circuit breaker, the fifth circuit breaker, and the sixth circuit breaker are respectively arranged on a side close to the first wire threading tube; the first circuit breaker, the third circuit breaker, and the fifth circuit breaker are each independently connected to a first circuit breaker copper busbar on a side away from the first wire threading tube, and each of the first circuit breaker copper busbars is independently connected to a fixed copper busbar on a side away from the first wire threading tube; the star-point circuit breaker is connected to a star-point circuit breaker copper busbar on a side away from the first wire threading tube, and the star-point circuit breaker copper busbar is connected to a star-point connecting copper busbar on a side away from the first wire threading tube;

[0008] At least two of the modular generator junction boxes have the same internal structure, and four busbar bushings are arranged between two adjacent modular generator junction boxes. The four busbar bushings are arranged side by side in the second direction, wherein two of the busbar bushings are respectively connected to the two adjacent first-petal junction boxes, and the other two busbar bushings are respectively connected to the two adjacent second-petal junction boxes; connecting busbars are respectively passed through the four busbar bushings, and the two fixed copper buses arranged side by side in the first direction in the two adjacent modular generator junction boxes are configured to be connected to the two ends of the same connecting busbar, and the two star-point connecting copper buses arranged side by side in the first direction in the two adjacent modular generator junction boxes are configured to be connected to the two ends of the same connecting busbar.

[0009] In a preferred embodiment, the four busbar bushings are made of insulating material.

[0010] In a preferred embodiment, the first wire threading tube has an inlet channel and two outlet channels.

[0011] In a preferred embodiment, the second wire threading tube has two wire inlet channels and one wire outlet channel.

[0012] In a preferred embodiment, the fixed copper busbar has a mounting hole for outlet wires.

[0013] In a preferred embodiment, 2 to 3 module generator junction boxes are arranged in parallel along the first direction.

[0014] In a preferred embodiment, a lead wire is provided in the first threading tube for connecting the first petal junction box to the second petal junction box, and a lead wire is provided in the second threading tube for connecting the second petal junction box to the first petal junction box.

[0015] In a preferred embodiment, the first circuit breaker, the second circuit breaker, the fixed copper busbar, the third circuit breaker, the fourth circuit breaker, the fifth circuit breaker, the sixth circuit breaker and the star point circuit breaker are each independently provided with at least one output terminal and at least one input terminal.

[0016] The number of output terminals and input terminals installed on each circuit breaker can be determined based on the current in the circuit. For circuit breakers with circuit breaker busbars installed on the input / output terminals, corresponding input terminals / output terminals will be installed on the fixed busbars indirectly connected to the corresponding circuit breaker.

[0017] The modular split-flap generator junction box provided by the present invention uses the same wiring method as the modular generator it connects to. The modular generator consists of two flaps and has four different wiring methods: the first is to connect the modular generators in series, with the internal windings connected in a Y-connection; the second is to connect the modular generators in series, with the internal windings connected in a delta-connection; the third is to connect the modular generators in parallel, with the internal windings connected in a Y-connection; and the fourth is to connect the modular generators in parallel, with the internal windings connected in a delta-connection.

[0018] Beneficial effects of the present invention

[0019] 1. The junction box provided by the present invention facilitates the capacity increase and decrease of the shaft-holding module generator;

[0020] 2. By using the junction box provided by the present invention, when a generator fails, the faulty module can be quickly tested and the faulty module can be quickly disconnected. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of a single-module generator junction box of the present invention;

[0022] Figure 2 This is a schematic diagram of the connection of the junction box of the dual-module generator of the present invention;

[0023] Figure 3 This is a schematic diagram of the connection of the three-module generator junction box of the present invention;

[0024] Figure 4 This is the Y-connection diagram of the windings of the module generator after series connection;

[0025] Figure 5 This is a schematic diagram of the △ connection of the windings after the module generator is connected in series;

[0026] Figure 6 This is the Y-connection diagram of the windings of the module generators after parallel connection;

[0027] Figure 7 This is a schematic diagram of the winding △ connection after the module generator is connected in parallel;

[0028] Figure 8 This is a schematic diagram of the Y-connection of the single-module generator junction boxes connected in series;

[0029] Figure 9 This is a schematic diagram of the Y-connection of the dual-module generator junction boxes connected in series.

[0030] In the figure, 1-first petal junction box; 2-first circuit breaker copper busbar; 3-first circuit breaker (U1); 4-second circuit breaker (U2); 5-fixed copper busbar; 6-third circuit breaker (V1); 7-fourth circuit breaker (V2); 8-first wire conduit; 9-second wire conduit; 10-fifth circuit breaker (W1); 11-sixth circuit breaker (W2); 12-second petal junction box; 13-star point circuit breaker; 14-star point circuit breaker copper busbar; 15-star point connection copper busbar; 16-first module generator junction box; 17-second module generator junction box; 18-connecting busbar; 19-busbar bushing; 20-third module generator junction box; 21, first petal winding; second petal winding. DETAILED DESCRIPTION

[0031] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0032] The weight and volume of shaft-clamped generators are affected by factors such as the space on board and the weight of the hoist. Therefore, modular products with low weight, small volume, and easy installation have become the future development direction. Due to the need to meet the shaft-clamped installation form, the generator needs to be divided into petals, and each modular generator has at least two petals. A shaft-clamped generator needs to be used in parallel by two or more module groups. The modular split-petal shaft-clamped generator junction box provided by the present invention is mainly aimed at modular and split-petal generator structures. Because the generator is modular, that is, a generator is composed of multiple modular generator blocks, each module is split into petals. In order to ensure the wiring specifications and facilitate wiring, wiring errors can be avoided. In the event of a motor failure, the module wiring can be quickly separated, and single module measurement can be achieved, making it convenient to analyze the problem.

[0033] like Figure 1 As shown, a modular generator consists of two petals, and each petal generator has a junction box, namely the first petal junction box 1 and the second petal junction box 12. The outgoing line in the first petal junction box 1 is U 1+ 、U 1- 、V 1+ 、V 1- 、W 1+ 、W 1- , the outgoing line in the second split junction box 12 is U 2+ 、U 2- 、V 2+ 、V 2- 、W 2+ 、W 2-. There are four circuit breakers in the first flap junction box 1, namely the first circuit breaker 3 (U1), the second circuit breaker 4 (U2), the third circuit breaker 6 (V1), and the fourth circuit breaker 7 (V2). There are two circuit breakers in the second flap junction box 12, namely the fifth circuit breaker 10 (W1) and the sixth circuit breaker 11 (W2). The first circuit breaker copper bus 2 is used to connect the fixed copper bus 5 and the 6 circuit breakers, and the fixed copper bus 5 has mounting holes for the outlet wires. The first wire conduit 8 is a 1-in-2 wire conduit, which is used to connect the wires from the first flap junction box 1 to the second flap junction box 12. The second wire conduit 9 is a 2-in-1 wire conduit, which is used to connect the wires from the second flap junction box 12 to the first flap junction box 1. The star point circuit breaker copper bus 14 connects the star point circuit breaker 13 and the star point connection copper bus 15.

[0034] There are four ways to connect a two-petal generator. The first is to connect the two-petal generator windings in series and then connect them in a "Y" shape. The second is to connect the two-petal generator windings in series and then connect them in a "△" shape. The third is to connect the two-petal generator windings in parallel and then connect them in a "Y" shape. The fourth is to connect the two-petal generator windings in parallel and then connect them in a "△" shape.

[0035] like Figure 4 As shown, the two-lobed generator windings are connected in series and then connected in a "Y" manner: U 1+ Connected to the first circuit breaker 3 (U1), V 1+ Connected to the third circuit breaker 6 (V1), W 1+ Connected to the fifth circuit breaker 10 (W1), U 1- 、U 2+ are connected to the input and output terminals of the second circuit breaker 4 (U2), V 1- 、V 2+ are connected to the input and output terminals of the fourth circuit breaker 7 (V2), W 1- 、W 2+ are connected to the input and output terminals of the sixth circuit breaker 11 (W2), U 2- 、V 2- 、W 2- Connect them to the star point copper bus 15 respectively.

[0036] like Figure 5 As shown, the two-lobed generator windings are connected in series and then connected in a "△" shape. 1+ and W 2- Connected to the first circuit breaker 3 (U1), V 1+ and U 2- Connected to the third circuit breaker 6 (V1), W 1+ and V 2- Connected to the fifth circuit breaker 10 (W1), U 1- 、U 2+ are connected to the input and output terminals of the second circuit breaker 4 (U2), V 1- 、V2+ are connected to the input and output terminals of the fourth circuit breaker 7 (V2), W 1- 、W 2+ They are respectively connected to the input and output terminals of the sixth circuit breaker 11 (W2), and the star point connection copper bus 15 is not connected.

[0037] The two-lobed generator winding is connected in parallel and then connected in a Y-shaped manner: U 1+ and U 2+ Connected to the first circuit breaker 3 (U1), V 1+ and V 2+ Connected to the third circuit breaker 6 (V1), W 1+ and W 2+ Connected to the fifth circuit breaker 10 (W1), U 1- 、V 1- 、W 1- 、U 2- 、V 2- 、W 2- They are respectively connected to the star point connection copper bus 15, and the second circuit breaker 4 (U2), the fourth circuit breaker 7 (V2), and the sixth circuit breaker 11 (W2) are not connected.

[0038] like Figure 6 As shown, the two-lobed generator windings are connected in parallel and then connected in a "△" shape: U 1+ 、U 2+ and W 1- 、W 2- Connected to the first circuit breaker 3 (U1), V 1+ 、V 2+ and U 1- 、U 2- Connected to the third circuit breaker 6 (V1), W 1+ 、W 2+ and V 1- , V2 are connected to the fifth circuit breaker 10 (W1), and the star point is connected to the copper bus 15. The second circuit breaker 4 (U2), the fourth circuit breaker 7 (V2), and the sixth circuit breaker 11 (W2) are not connected.

[0039] The modular split-type generator junction box provided by the present invention adopts the same wiring method as the modular generator it is connected to. Taking the first wiring method as an example, Figure 8 and 9 They are respectively intended to be Y-connected after the single-module and double-module generator terminal boxes of the present invention are connected in series. Their wiring method is the same as the wiring method of the first two-petal generator. When the modular generator adopts the wiring method of "Y" connection after the two-petal generator windings are connected in series, the modular generator terminal box of the present invention also adopts the wiring method of "Y" connection after series connection.

[0040] like Figure 7As shown, before use, connect the wires as required and the circuit breaker is in the open circuit state. After the wiring is completed, the relevant circuit breakers need to be closed to complete the wiring. The fixed copper bus 5 of each phase is connected to the U, V, W and star points of the generator, and the first circuit breaker 3 (U1), the third circuit breaker 6 (V1), and the fifth circuit breaker 10 (W1) are closed or opened.

[0041] The wiring method of the two-piece junction box on each module generator is the same, and there are only U, V, W and star point to the outside.

[0042] like Figure 2 As shown, the first split junction box 1 and the second split junction box 12 constitute a first module generator junction box 16 , and the second module generator junction box 17 and the first module generator junction box 16 have the same components.

[0043] The U, V, W, and star point parallel connections of the first module generator junction box 16 and the second module generator junction box 17 are connected using a connecting busbar 18. The connecting busbar 18 connects the fixed copper busbars 5 of the two junction boxes. The busbar sleeve 19 is made of insulating material to ensure the creepage distance between the connecting busbar 18 and the junction boxes when passing through the two junction boxes.

[0044] like Figure 3 As shown, each time a generator module is added, a module junction box is added, such as the third module generator junction box 20 , and the parallel wiring of each module junction box uses the connecting busbar 18 .

[0045] When the capacity-increasing current becomes larger, the busbar 18 can be connected in parallel to increase the busbar's operating current and ensure the busbar's safe use.

[0046] If a generator with a stuck shaft fails, disconnect any phase on each generator module individually to test whether it is faulty. After the faulty module is identified, disconnect the first circuit breaker 3 (U1), the third circuit breaker 6 (V1), the fifth circuit breaker 10 (W1), and the star point circuit breaker 13 on the faulty module to remove the faulty module. Close the motor-related circuit breakers on the remaining generator modules, and use the generator with a reduced capacity.

[0047] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A modular split-flap shaft-enclosed generator junction box, characterized in that: The invention comprises at least two module generator junction boxes arranged side by side along a first direction (y), wherein each module generator junction box comprises a first split junction box (1) and a second split junction box (12); the second split junction box (12) and the first split junction box (1) are arranged side by side in a second direction (x), and the second direction (x) and the first direction (y) are perpendicular to each other; a first threading tube (8) is configured to connect the first split junction box (1) and the second split junction box (12); a second threading tube (9) is configured to connect the first split junction box (1) and the second split junction box (12), and is arranged side by side with the first threading tube (8) in the first direction (y); The first split junction box (1) comprises a first circuit breaker (3), a second circuit breaker (4), a fixed copper busbar (5), a third circuit breaker (6), and a fourth circuit breaker (7) distributed in a quadrilateral; the first circuit breaker (3) and the third circuit breaker (6) are arranged in parallel with the second threading tube (9) in the second direction (x); the second circuit breaker (4) and the fourth circuit breaker (7) are arranged in parallel with the first threading tube (8) in the second direction (x); The second split junction box (12) includes a fifth circuit breaker (10), a sixth circuit breaker (11), and a star point circuit breaker (13) distributed in a triangular shape; the fifth circuit breaker (10) and the second threading tube (9) are arranged side by side in the second direction (x), and the sixth circuit breaker (11) and the first threading tube (8) are arranged side by side in the second direction (x); The third circuit breaker (6), the fourth circuit breaker (7), the fifth circuit breaker (10) and the sixth circuit breaker (11) are respectively arranged on a side close to the first threading tube (8); the first circuit breaker (3), the third circuit breaker (6) and the fifth circuit breaker (10) are each independently connected to a first circuit breaker copper busbar (2) on a side away from the first threading tube (8), and each of the first circuit breaker copper busbars (2) is each independently connected to a fixed copper busbar (5) on a side away from the first threading tube (8); the star point circuit breaker (13) is connected to a star point circuit breaker copper busbar (14) on a side away from the first threading tube (8), and the star point circuit breaker copper busbar (14) is connected to a star point connection copper busbar (15) on a side away from the first threading tube (8); At least two of the module generator junction boxes have the same internal structure, and four busbar bushings (19) are arranged between two adjacent module generator junction boxes. The four busbar bushings (19) are arranged in parallel in the second direction (x), wherein two of the busbar bushings (19) are respectively connected to the two adjacent first-flap junction boxes (1), and the other two busbar bushings (19) are respectively connected to the two adjacent second-flap junction boxes (12); a connecting busbar (18) is respectively passed through the four busbar bushings (19), and the two fixed copper bars (5) arranged in parallel in the first direction (y) in the two adjacent module generator junction boxes are configured to be connected to the two ends of the same connecting busbar (18), and the two star-point connecting copper bars (15) arranged in parallel in the first direction (y) in the two adjacent module generator junction boxes are configured to be connected to the two ends of the same connecting busbar (18).

2. The modular split-flap shaft-enclosed generator junction box according to claim 1 is characterized in that: The four busbar bushings (19) are made of insulating material.

3. The modular split-flap shaft-enclosed generator junction box according to claim 1 is characterized in that: The first threading tube (8) is provided with an inlet channel and two outlet channels.

4. The modular split-flap shaft-enclosed generator junction box according to claim 1 is characterized in that: The second threading tube (9) is provided with two inlet channels and one outlet channel.

5. The modular split-flap shaft-enclosed generator junction box according to claim 1 is characterized in that: The fixed copper busbar (5) is provided with a mounting hole for outlet wires.

6. The modular split-flap shaft-enclosed generator junction box according to claim 1, characterized in that: Two to three module generator junction boxes are arranged in parallel along the first direction (y).

7. The modular split-flap shaft-enclosed generator junction box according to claim 1 is characterized in that: The first threading tube (8) is provided with a lead wire for connecting the first split junction box (1) to the second split junction box (12), and the second threading tube (9) is provided with a lead wire for connecting the second split junction box (12) to the first split junction box (1).

8. The modular split-flap shaft-enclosed generator junction box according to claim 1 is characterized in that: The first circuit breaker (3), the second circuit breaker (4), the fixed copper busbar (5), the third circuit breaker (6), the fourth circuit breaker (7), the fifth circuit breaker (10), the sixth circuit breaker (11) and the star point circuit breaker (13) are each independently provided with at least one output terminal and at least one input terminal.

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