CN112039267A - Terminal box for conductive bar and high-voltage double-fed wind driven generator and installation method thereof - Google Patents
Terminal box for conductive bar and high-voltage double-fed wind driven generator and installation method thereof Download PDFInfo
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- CN112039267A CN112039267A CN202010804057.2A CN202010804057A CN112039267A CN 112039267 A CN112039267 A CN 112039267A CN 202010804057 A CN202010804057 A CN 202010804057A CN 112039267 A CN112039267 A CN 112039267A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R25/00—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits
- H01R25/16—Rails or bus-bars provided with a plurality of discrete connecting locations for counterparts
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/0056—Manufacturing winding connections
- H02K15/0062—Manufacturing the terminal arrangement per se; Connecting the terminals to an external circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
- H02K3/505—Fastening of winding heads, equalising connectors, or connections thereto for large machine windings, e.g. bar windings
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- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention belongs to the technical field of high-voltage double-fed wind driven generators, and relates to a terminal box for a conductive bar and a high-voltage double-fed wind driven generator and an installation method thereof. The conducting bar simultaneously meets the assembly requirements of the motor side and the user cable; the junction box is distributed by the positions of the three-phase conducting bars, the three-phase conducting bars are respectively positioned on the insulating column support, the distance between every two adjacent conducting bars is larger than or equal to 220mm, and the design between every two conducting bars is compact and the occupied space is small. When the junction box is installed, the stator outgoing line freely hangs in the stator junction box, so that the bending radius of the stator outgoing line is ensured, and the use reliability of a cable can be improved; on the other hand, the effective length of the cable can be lengthened, so that the insulation resistance of the surface of the cable is increased, and the insulation performance of the cable is enhanced.
Description
Technical Field
The invention belongs to the technical field of high-voltage double-fed wind driven generators, and relates to a junction box for a generator, in particular to a conductive bar, a junction box for a high-voltage double-fed wind driven generator and an installation method of the junction box.
Background
At present, the state vigorously develops a new energy utilization technology, thereby promoting continuous innovation and progress of a wind power generation technology and a wind power generator design and manufacture technology. The voltage class of a high-voltage power supply network in various places of China is mainly 10kV, if a 10.5kV high-voltage double-fed motor is installed, one boosting transformer can be installed in a small number, the capacity of the boosting transformer is the same as the power of a wind driven generator, the cost is high, the control is complex, and the reliability of the whole wind driven generator set is reduced.
Most of the existing doubly-fed wind generators are low-level, the voltage level is 690V, and therefore the requirements on creepage distance and electric clearance are low. The existing stator junction box structure takes two insulators as supports, a conductive copper bar is rectangular and long, the conductive copper bar is fixed on the insulators, a stator outgoing line is led out from the rear end of the copper bar, and U, V, W three phases are respectively arranged in a step shape. The stator junction box structure occupies a large space and is heavy, and cannot be applied to a junction box of a high-voltage doubly-fed generator.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a terminal box for a high-voltage double-fed wind driven generator and an installation method thereof, so as to solve the problems of large occupied space and heavy weight of the terminal box for the high-voltage double-fed wind driven generator.
In order to achieve the purpose, the invention provides the following technical scheme:
in a first aspect, the invention provides a conducting bar, which is applied to a junction box of a high-voltage double-fed wind driven generator, wherein the conducting bar comprises a conducting bar body, the conducting bar body comprises a first mounting hole, a second mounting hole and a third mounting hole, and connecting lines at the positions of the three mounting holes form a triangle; the first mounting hole is used for being connected with a high-voltage insulator in the junction box; the second mounting hole is used for being connected with a stator lead-out wire of the generator, and the stator lead-out wire penetrates through the junction box body and is connected with the stator coil; the third mounting hole is used for being connected with a user cable, and the user cable penetrates through the junction box body to be connected with a power grid.
Furthermore, the triangle is an isosceles triangle, and the vertex angles of the isosceles triangle are rounded off; the first mounting holes are located at the vertex angles of the isosceles triangle, and the positions of the second mounting holes and the third mounting holes are symmetrical about the center line of the bottom side of the isosceles triangle.
Furthermore, the triangle is a right-angle triangle, and the right angle is rounded;
the first mounting hole and the second mounting hole are positioned on one right-angle edge, and the third mounting hole is positioned on the other right-angle edge;
or the first mounting hole and the third mounting hole are positioned on one right-angle edge, and the second mounting hole is positioned on the other right-angle edge.
In a second aspect, the invention provides a junction box for a high-voltage doubly-fed wind generator, which comprises a junction box body, wherein the junction box body is fixed on the outer side of the side wall of a motor; the junction box body comprises an insulating device and the conductive bar partially or completely;
the insulation device comprises a support assembly positioned on the outer side of the side wall of the motor, the support assembly comprises at least two support columns, each support column is fixed on the side wall of the motor and used for mounting an insulation column support, and three high-voltage insulators are mounted on the insulation column supports;
each high-voltage insulator is connected with a conductive bar, the conductive bar comprises three mounting holes, and the first mounting hole is used for being connected with the high-voltage insulator; the second mounting hole is used for being connected with a stator lead-out wire, and the stator lead-out wire penetrates through a high-voltage insulation plate on the outer side of the side wall of the motor and is connected with a stator coil; the third mounting hole is used for being connected with a user cable, and the user cable penetrates through the bottom plate of the junction box body to be connected with a power grid.
Furthermore, the high-voltage insulation board is located above/below the insulation column support, a lead hole is formed in the high-voltage insulation board, and a nylon wire sheath is installed in the lead hole.
Furthermore, two ends of the high-voltage insulator are respectively provided with a double-bolt structure for preventing rotation.
Furthermore, the junction box body comprises a junction box shell fixedly connected with the side wall of the motor, a cover plate and a bottom plate, the cover plate is parallel to the side wall of the motor, the bottom plate is perpendicular to the side wall of the motor, and the cover plate and the bottom plate are fixed with the junction box shell through bolts respectively.
Furthermore, a bottom plate sealing gasket is arranged on the upper surface of the bottom plate, and the bottom plate sealing gasket is bonded with the bottom plate through an adhesive, so that the whole junction box is protected in a sealing mode.
Further, the inner surface of the cover plate is provided with a cover plate sealing gasket, and the cover plate sealing gasket is bonded with the cover plate through an adhesive to play a role in sealing and protecting the whole junction box.
In a third aspect, the invention provides an installation method of a junction box for a high-voltage doubly-fed wind generator, which comprises the following steps:
1) an insulating device is arranged on the outer side of the side wall of the motor;
2) installing conducting bars on the outer side of the side wall of the motor, wherein each conducting bar is connected with a high-voltage insulator of the insulating device in the step 1);
3) fixing the junction box shell and the side wall of the motor to ensure that the conducting bar and the insulating device are positioned at the inner side of the junction box shell;
5) a bottom plate sealing gasket is bonded on the upper surface of the bottom plate, and the bottom plate is fixed with the junction box shell;
6) and a cover plate sealing gasket is bonded on the inner surface of the cover plate to fix the cover plate and the junction box shell.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
on the first hand, through the design of the conductive bar structure, the connecting lines of the positions of the three mounting holes form a triangle; the first mounting hole is used for being connected with a high-voltage insulator in the junction box; the second mounting hole is used for being connected with the stator outgoing line of the generator, and the third mounting hole is used for being connected with a user cable, so that the conductive bar meets the assembly requirements of the motor side and the user cable.
In the second aspect, the three-phase conducting bars are respectively positioned on the insulating column support through the position layout among the three-phase conducting bars, and the design between every two conducting bars is compact and the occupied space is small.
Simultaneously, through set up the double-screw bolt structure that prevents rotatoryly respectively at high-voltage insulator's both ends, realize fixing high-voltage insulator through the combined action of insulating column support and conductive row, prevent that it from producing the structure inefficacy because rotatory in the course of the work.
In the third aspect, when the junction box for the high-voltage double-fed wind driven generator is installed, the stator outgoing line freely hangs in the stator junction box, so that the bending radius of the stator outgoing line is ensured, and the use reliability of a cable can be improved; on the other hand, the effective length of the cable can be lengthened, so that the insulation resistance of the surface of the cable is increased, and the insulation performance of the cable is enhanced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a conductive bar according to the present invention;
FIG. 2 is a schematic structural diagram of another conductive bar according to the present invention;
FIG. 3 is a side view of FIG. 2;
FIG. 4 is a schematic structural diagram of the junction box for a high-voltage doubly-fed wind generator provided by the invention with a cover plate removed;
FIG. 5 is a side view of the junction box for the high-voltage doubly-fed wind generator provided by the invention;
FIG. 6 is a front view of the junction box for a high-voltage doubly-fed wind generator provided by the invention;
fig. 7 is a cross-sectional view of a high voltage insulator provided by the present invention;
fig. 8 is a side view of fig. 7.
Wherein: 1. a motor side wall; 2. a first mounting hole; 3. a second mounting hole; 4. a third mounting hole; 5. a high-voltage insulator; 6. a stator lead-out wire; 7. a subscriber cable; 8. a junction box housing; 9. a support pillar; 10. an insulating column support; 11. a conductive bar; 12. a high voltage insulation plate; 13. a nylon wire sheath; 14. a double-bolt structure; 15. a cover plate; 16. a base plate; 17. a base plate gasket; 18. a cover plate gasket; 19. a handle.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and examples.
Example 1:
in a first aspect, referring to fig. 1, the invention provides a conducting bar, which is applied to a junction box of a high-voltage doubly-fed wind generator, wherein the conducting bar 11 comprises a conducting bar body, the conducting bar body comprises a first mounting hole, a second mounting hole and a third mounting hole, and connecting lines of positions of the three mounting holes form a triangle; the first mounting hole 2 is used for being connected with a high-voltage insulator 5 in the junction box; the second mounting hole 3 is used for being connected with a stator lead-out wire 6 of the generator, and the stator lead-out wire 6 penetrates through the junction box body to be connected with the stator coil; the third mounting hole 4 is used for connecting with a user cable 7, and the user cable 7 passes through the junction box body to be connected with a power grid.
Furthermore, connecting lines of the positions of the three mounting holes form an isosceles triangle, and vertex angles of the isosceles triangle are rounded; the first mounting hole 2 is positioned at the vertex angle of the isosceles triangle, and the positions of the second mounting hole 3 and the third mounting hole 4 are symmetrical about the central line of the bottom side of the isosceles triangle.
In a second aspect, referring to fig. 4 to 6, the invention further provides a junction box for a high-voltage doubly-fed wind generator, which includes a junction box body, wherein the junction box body is fixed on the outer side of the side wall 1 of the motor, and an insulating device and the above partial or all of the conducting bars 11 are arranged in the junction box body;
the insulation device comprises a support assembly positioned on the outer side of the side wall 1 of the motor, the support assembly comprises at least two support columns 9, each support column 9 is fixed on the side wall 1 of the motor and used for mounting an insulation column support 10, three high-voltage insulators 5 are mounted on the insulation column support 10, and the distance between every two adjacent high-voltage insulators 5 is larger than or equal to 220 mm;
each high-voltage insulator 5 is connected with a conductive bar 11, the conductive bar 11 comprises three mounting holes, and the first mounting hole 2 is used for being connected with the high-voltage insulator 5; the second mounting hole 2 is used for being connected with a stator lead-out wire 6, and the stator lead-out wire 6 penetrates through a high-voltage insulating plate 12 on the outer side of the side wall 1 of the motor to be connected with a stator coil; the third mounting hole 4 is used for connecting with a user cable 7, and the user cable 7 passes through the bottom plate 16 of the junction box body to be connected with a power grid.
Further, the high-voltage insulating plate 12 is located below the insulating column support 10, and a lead hole is formed in the high-voltage insulating plate 12 and is provided with a nylon wire sheath 13.
Further, as shown in fig. 7-8, two ends of the high-voltage insulator 5 are respectively provided with a double-bolt structure 14 for preventing rotation, and the high-voltage insulator 5 is fixed by the combined action of the insulating column bracket 10 and the conductive bar 11, so that structural failure caused by rotation in the working process is prevented.
As an optional or preferred embodiment, the junction box body is composed of a junction box housing 8, a bottom plate 16 and a cover plate 15, the motor side wall 1 serves as a junction box side plate, the side plate and the cover plate 15 are arranged in parallel, the bottom plate 16 and the side plate are arranged vertically, and the cover plate 15 and the bottom plate 16 are respectively fixed with the junction box housing 8 through bolts; the stator lead-out wire 6 passes through a high-voltage insulation plate 12 on the outer side of the motor side wall 1 to be connected with a stator coil, and the user cable 7 passes through a bottom plate 16 of the junction box body to be connected with a power grid. The junction box housing 8 may be formed by bending a steel plate, or may have a frame structure formed by angle steel and steel plate members.
Further, a bottom plate sealing gasket 17 is arranged on the upper surface of the bottom plate 16, the bottom plate sealing gasket 17 is bonded with the bottom plate 16 through an adhesive, and the bottom plate 16 is connected with the junction box shell 8 through bolts to play a role in sealing and protecting the whole junction box.
Further, a cover plate sealing gasket 18 is arranged on the inner surface of the cover plate 15, the cover plate sealing gasket 18 is bonded with the cover plate 15 through an adhesive, and the cover plate 15 is connected with the junction box shell 8 through a bolt to play a role in sealing and protecting the whole junction box.
Furthermore, two handles 19 are arranged in the middle of the outer surface of the cover plate 15, so that the cover plate is convenient for workers to disassemble and assemble.
In a third aspect, the invention provides an installation method of a junction box for a high-voltage doubly-fed wind generator. This terminal box includes the terminal box body, and the terminal box body comprises terminal box casing 8, bottom plate 16 and apron 15, and motor lateral wall 1 acts as the terminal box curb plate, curb plate and 15 parallel arrangement of apron, and bottom plate 16 sets up with the curb plate is perpendicular, and apron 15, bottom plate 16 are fixed through bolt and terminal box casing 8 respectively. The mounting method specifically comprises the following steps:
s1, installing at least two support columns 9 on the outer surface of a side wall 1 of a motor, fixing an insulating column support 10 and the support columns 9 through bolt groups, respectively installing three high-voltage insulators 5 on the insulating column support 10, wherein the distance between every two adjacent high-voltage insulators 5 is more than or equal to 220 mm;
s2, each high-voltage insulator 5 is connected with a conducting bar 11, and a first mounting hole 2 of each conducting bar 11 is connected with the high-voltage insulator 5;
s3, installing a high-voltage insulating plate 12 below the insulating column support 10 on the outer surface of the side wall 1 of the motor, connecting the high-voltage insulating plate 12 with the side wall 1 of the motor through a bolt group, and sleeving a nylon wire protecting sleeve 13 at a lead hole on the high-voltage insulating plate 12;
s4, the junction box shell 8 is fixed with the side wall 1 of the motor through bolts, and the conductive bar 11 and the insulating device are located on the inner side of the junction box shell 8;
s5, a bottom plate sealing gasket 17 is bonded on the upper surface of the bottom plate 16, and the bottom plate 16 is fixed with the junction box shell 8 through bolts;
s6, a cover plate sealing gasket 18 is bonded on the inner surface of the cover plate 15, and the cover plate 15 is fixed with the junction box shell 8 through bolts.
After the junction box for the high-voltage doubly-fed wind generator is installed, the use method is as follows:
1. completing the connection of the motor side lead: firstly, connecting a stator lead-out wire 6 with a second mounting hole 3, wherein the stator lead-out wire 6 freely hangs in a junction box; then, the stator lead-out wire 6 is connected with the stator coil by penetrating through a lead hole of the high-voltage insulating plate 12;
2. completing the connection of the user cable lead: first, the subscriber cable 7 is connected to the third mounting hole 4; the user cable 7 is then connected to the electrical network through the base 16 of the junction box body.
Example 2:
in a first aspect, the embodiment provides a conductive bar, where the conductive bar 11 includes a conductive bar body, the conductive bar body includes a first mounting hole, a second mounting hole, and a third mounting hole, and connection lines at positions of the three mounting holes form a triangle; the first mounting hole 2 is used for being connected with a high-voltage insulator 5 in the junction box; the second mounting hole 3 is used for being connected with a stator lead-out wire 6 of the generator, and the stator lead-out wire 6 penetrates through the junction box body to be connected with the stator coil; the third mounting hole 4 is used for connecting with a user cable 7, and the user cable 7 passes through the junction box body to be connected with a power grid.
As shown in fig. 2-3, the connecting lines of the positions of the three mounting holes form a right-angled triangle, and the right-angled position is rounded; the first mounting hole 2 and the second mounting hole 3 are positioned on one right-angle edge, and the third mounting hole 4 is positioned on the other right-angle edge; or the first mounting hole 2 and the third mounting hole 4 are positioned on one right-angle side, and the second mounting hole 3 is positioned on the other right-angle side.
In a second aspect, the present embodiment provides a junction box for a high-voltage doubly-fed wind turbine, including a junction box body, wherein the junction box body is fixed to the outer side of a side wall 1 of a motor; the junction box body comprises an insulating device and the conductive bar 11 which is partially or totally described above;
the insulation device comprises a support assembly positioned on the outer side of the side wall 1 of the motor, the support assembly comprises at least two support columns 9, each support column 9 is fixed on the side wall 1 of the motor and used for mounting an insulation column support 10, three high-voltage insulators 5 are mounted on the insulation column support 10, and the distance between every two adjacent high-voltage insulators 5 is larger than or equal to 220 mm;
each high-voltage insulator 5 is connected with a conductive bar 11, the conductive bar 11 comprises three mounting holes, and the first mounting hole 2 is used for being connected with the high-voltage insulator 5; the second mounting hole 3 is used for being connected with a stator lead-out wire 6, and the stator lead-out wire 6 penetrates through a high-voltage insulating plate 12 on the outer side of the side wall 1 of the motor to be connected with a stator coil; the third mounting hole 4 is used for connecting with a user cable 7, and the user cable 7 passes through the bottom plate 16 of the junction box body to be connected with a power grid.
Further, the high-voltage insulating plate 12 is located above the insulating column support 10, and a lead hole is formed in the high-voltage insulating plate 12 and provided with a nylon wire sheath 13.
Specifically, when the high-voltage insulating plate 12 is located above the insulating support 10, the stator lead-out wires 6 can hang freely in the junction box only by rotating the conductive bar 11 by 180 degrees (referring to the position of the conductive bar shown in fig. 4) when the conductive bar 11 is installed, and the user cables 7 are led out from the upper side of the junction box housing 8.
Further, as shown in fig. 7-8, two ends of the high-voltage insulator 5 are respectively provided with a double-bolt structure 14 for preventing rotation, and the high-voltage insulator 5 is fixed by the combined action of the insulating column bracket 10 and the conductive bar 11, so that structural failure caused by rotation in the working process is prevented.
As an optional or preferred embodiment, the junction box body is composed of a junction box housing 8, a bottom plate 16, side plates and a cover plate 15, wherein the side plates are arranged in parallel with the cover plate 15, the bottom plate 16 is arranged perpendicular to the side plates, and the cover plate 15, the bottom plate 16 and the side plates are respectively fixed with the junction box housing 8 through bolts; the stator lead-out wire 6 passes through the high-voltage insulating plate 12 of the side plate to be connected with the stator coil, and the user cable 7 passes through the bottom plate 16 to be connected with the power grid.
Further, a bottom plate sealing gasket 17 is arranged on the upper surface of the bottom plate 16, and the bottom plate sealing gasket 17 is bonded with the bottom plate 16 through an adhesive, so that the whole junction box is protected in a sealing mode.
Further, the inner surface of the cover plate 15 is provided with a cover plate sealing gasket 18, and the cover plate sealing gasket 18 is bonded with the cover plate 15 through an adhesive, so that the whole junction box is protected in a sealing manner.
In a third aspect, the invention provides an installation method of a junction box for a high-voltage doubly-fed wind generator. The junction box comprises a junction box body, wherein the junction box body is composed of a junction box shell 8, a bottom plate 16, side plates and a cover plate 15, the side plates are arranged in parallel with the cover plate 15, the bottom plate 16 is perpendicular to the side plates, and the cover plate 15, the bottom plate 16 and the side plates are fixed with the junction box shell 8 through bolts respectively. The mounting method specifically comprises the following steps:
s1, fixing a side plate of a junction box body with a motor side wall 1 through a bolt;
s2, installing at least two support columns 9 on the side plate, fixing the insulating column support 10 and the support columns 9 through bolt groups, respectively installing three high-voltage insulators 5 on the insulating column support 10, wherein the distance between every two adjacent high-voltage insulators 5 is more than or equal to 220 mm;
s3, each high-voltage insulator 5 is connected with a conducting bar 11, and a first mounting hole 2 of each conducting bar 11 is connected with the high-voltage insulator 5;
s4, installing a high-voltage insulating plate 12 below the insulating column support 10 on the outer surface of the side plate, connecting the high-voltage insulating plate 12 with the side wall 1 of the motor through a bolt group, and sleeving a nylon wire sheath 13 at a lead hole on the high-voltage insulating plate 12;
s5, the junction box shell 8 is fixed with the side wall 1 of the motor through bolts, and the conductive bar 11 and the insulating device are located on the inner side of the junction box shell 8;
s6, a bottom plate sealing gasket 17 is bonded on the upper surface of the bottom plate 16, and the bottom plate 16 is fixed with the junction box shell 8 through bolts;
s7, a cover plate sealing gasket 18 is bonded on the inner surface of the cover plate 15, and the cover plate 15 is fixed with the junction box shell 8 through bolts.
After the junction box for the high-voltage doubly-fed wind generator is installed, the using method of the junction box is the same as that of the junction box in the embodiment 1.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
It is to be understood that the present invention is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. The conductive bar is applied to a junction box of a high-voltage doubly-fed wind driven generator, and is characterized in that the conductive bar (11) comprises a conductive bar body, the conductive bar body comprises a first mounting hole, a second mounting hole and a third mounting hole, and connecting lines of the positions of the three mounting holes form a triangle; the first mounting hole (2) is used for being connected with a high-voltage insulator (5) in the junction box; the second mounting hole (3) is used for being connected with a stator lead wire (6) of the generator, and the stator lead wire (6) penetrates through the junction box body to be connected with the stator coil; the third mounting hole (4) is used for being connected with a user cable (7), and the user cable (7) penetrates through the junction box body to be connected with a power grid.
2. The conducting bar according to claim 1, wherein the triangles are isosceles triangles, and the top angles of the isosceles triangles are rounded; the first mounting holes (2) are located at the vertex angles of the isosceles triangle, and the positions of the second mounting holes (3) and the third mounting holes (4) are symmetrical about the center line of the bottom side of the isosceles triangle.
3. The conductive bar of claim 1 wherein the triangle is a right triangle and the right angle is rounded;
the first mounting hole (2) and the second mounting hole (3) are positioned on one right-angle edge, and the third mounting hole (4) is positioned on the other right-angle edge;
or the first mounting hole (2) and the third mounting hole (4) are positioned on one right-angle edge, and the second mounting hole (3) is positioned on the other right-angle edge.
4. The junction box for the high-voltage double-fed wind driven generator comprises a junction box body, wherein the junction box body is fixed on the outer side of a motor side wall (1); -characterized in that the terminal block body comprises insulating means and a conductive bar (11) according to any of claims 1 to 3;
the insulation device comprises a support assembly positioned on the outer side of the side wall (1) of the motor, the support assembly comprises at least two support columns (9), each support column (9) is fixed on the side wall (1) of the motor and used for mounting an insulation column support (10), and three high-voltage insulators (5) are mounted on the insulation column support (10);
each high-voltage insulator (5) is connected with a conductive bar (11), the conductive bar (11) comprises three mounting holes, and the first mounting hole (2) is used for being connected with the high-voltage insulator (5); the second mounting hole (3) is used for being connected with a stator lead-out wire (6), and the stator lead-out wire (6) penetrates through a high-voltage insulating plate (12) on the outer side of the motor side wall (1) to be connected with a stator coil; the third mounting hole (4) is used for being connected with a user cable (7), and the user cable (7) penetrates through a bottom plate (16) of the junction box body to be connected with a power grid.
5. The junction box for the high-voltage doubly-fed wind generator according to claim 4, wherein the high-voltage insulating plate (12) is positioned above/below the insulating column bracket (10), and a lead hole is formed in the high-voltage insulating plate (12), and a nylon wire sheath (13) is installed in the lead hole.
6. Terminal box according to claim 4, characterized in that the high-voltage insulator (5) is provided with double-bolt structures (14) for preventing rotation at both ends.
7. The junction box for the high-voltage doubly-fed wind generator according to claim 4, wherein the junction box body comprises a junction box shell (8) fixedly connected with the motor side wall (1), a cover plate (15) and a bottom plate (16), the cover plate (15) is arranged in parallel with the motor side wall (1), the bottom plate (16) is arranged perpendicular to the motor side wall (1), and the cover plate (15) and the bottom plate (16) are respectively fixed with the junction box shell (8) through bolts.
8. The junction box for the high-voltage doubly-fed wind generator as claimed in claim 7, wherein a bottom plate gasket (17) is arranged on the upper surface of the bottom plate (16), and the bottom plate gasket (17) is bonded with the bottom plate (16) through an adhesive.
9. The junction box for the high-voltage doubly-fed wind generator according to claim 7, characterized in that a cover plate sealing gasket (18) is arranged on the inner surface of the cover plate (15), and the cover plate sealing gasket (18) is bonded with the cover plate (15) through an adhesive.
10. The installation method of the junction box for the high-voltage doubly-fed wind generator is characterized by comprising the following steps of:
1) an insulating device is arranged on the outer side of the side wall (1) of the motor;
2) installing conducting bars (11) on the outer side of the side wall (1) of the motor, wherein each conducting bar (11) is connected with the high-voltage insulator (5) of the insulating device in the step 1);
3) fixing a junction box shell (8) and the side wall (1) of the motor, and ensuring that a conductive bar (11) and an insulating device are positioned on the inner side of the junction box shell (8);
5) a bottom plate sealing gasket (17) is bonded on the upper surface of the bottom plate (16) to fix the bottom plate (16) and the junction box shell (8);
6) a cover plate gasket (18) is bonded to the inner surface of the cover plate (15) to fix the cover plate (15) to the junction box case (8).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010804057.2A CN112039267A (en) | 2020-08-12 | 2020-08-12 | Terminal box for conductive bar and high-voltage double-fed wind driven generator and installation method thereof |
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| CN202010804057.2A CN112039267A (en) | 2020-08-12 | 2020-08-12 | Terminal box for conductive bar and high-voltage double-fed wind driven generator and installation method thereof |
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| CN112039267A true CN112039267A (en) | 2020-12-04 |
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