High-speed motor rotor lead and fixing structure thereof

Abstract

The invention belongs to the technical field of wind driven generators, particularly relates to a high-speed motor rotor lead and a fixing structure thereof, and aims to solve the problems of limitation of the space size of a hollow shaft end of a high-power motor and connection of two ends of a rotor winding lead-out wire in the background technology. The leading-out wire internally comprises a cable, a first copper bar and a second copper bar which are distributed adjacently. The mode that the cable and the copper bar are connected together is adopted, due to the fact that the conductive density of the copper bar is large, the requirement for large output current can be met through the copper bar with the small section, and therefore the problems that the diameter of a lead-out wire is required to be large, and the hole diameter of the hollow shaft end cannot be increased due to limitation are solved, the lead-out wire can be connected with a fastener, and the service life of the lead-out wire is prolonged. And the rotor winding connecting piece adopts the in-hole supporting piece and the end part fixing seat with special structures, and the three-phase copper bar is led out to the fastening piece, so that the assembly function is considered, and the reliable connection of the slip ring and the rotor outgoing line is realized.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generators, and in particular to a high-speed motor rotor lead and a fixing structure thereof. Background Art

[0002] After the rotor winding lead wire of the doubly-fed asynchronous wind turbine is led out, it must be connected to the slip ring at the motor shaft end. In the early days, the shaft end surface cable lead structure was generally used, and then the shaft end center hole cable lead structure appeared.

[0003] With the development of high-power doubly-fed asynchronous wind turbines, the rotor current has increased, and the cross-sectional area of ​​the lead wire has also increased accordingly. The early shaft end surface lead wire structure and the center hole lead wire structure could not meet the requirements in terms of structure and space. Later, the traditional cable was changed to a copper busbar. Although it met the requirements of large output current and the problem that the shaft hole diameter at the outlet could not be increased, a new problem emerged: one end of the copper busbar was connected to the slip ring terminal and the other end was connected to the winding connector. The "hard" connection at both ends was difficult to ensure at the same time, and assembly was more difficult. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a high-speed motor rotor lead and a fixing structure thereof, which overcomes the deficiencies in the prior art and effectively solves the problem of limitation of the spatial size of the hollow shaft end of a high-power motor, connection of both ends of the rotor winding lead, and how to reliably fix the lead.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A high-speed motor rotor lead includes a lead-out line, wherein the lead-out line includes a cable, a first copper bar and a second copper bar which are adjacently distributed, the cable is arranged between the first copper bar and the second copper bar, and a butt sleeve is connected to the connection between the cable and the first copper bar and the connection between the cable and the second copper bar.

[0007] A fixing structure for a high-speed motor rotor lead comprises a hollow shaft end, a slip ring is arranged on the outer wall of one end of the hollow shaft end, and a rotor winding connector is fixedly connected to the inner wall of the other end of the hollow shaft end, the rotor winding connector comprises a first end fixing seat, a second end fixing seat and an in-hole support member, and the in-hole support member is fixedly connected between the first end fixing seat and the second end fixing seat, and fasteners distributed equidistantly are fixedly connected to the outer wall of one side of the slip ring.

[0008] Preferably, the outer walls of the first end fixing seat and the second end fixing seat are both provided with embedding grooves, and the outer walls of the first end fixing seat and the second end fixing seat are provided with glue-filling grooves distributed at equal distances on one side of the embedding grooves.

[0009] Preferably, one end of the outer wall of the hollow shaft end is provided with cable entry holes which are distributed at equal distances.

[0010] Preferably, a positioning hole is opened at the center of the outer wall of one side of the slip ring, and the hollow shaft end is arranged and connected to the inner wall of the positioning hole.

[0011] Preferably, an end connecting bar is riveted to the outer wall of one end of the second copper bar.

[0012] The beneficial effects of the present invention are:

[0013] 1. The high-speed motor rotor lead wire and its fixing structure of the present invention adopt the method of connecting the cable and the copper bar together. Since the conductive density of the copper bar is relatively large, the copper bar with a smaller cross-section can meet the requirement of large output current, thereby solving the problem that the lead wire requires a large diameter, but the hollow shaft end is limited, resulting in the inability to increase its aperture, and the lead wire can simultaneously meet the connection between the winding end and the slip ring end;

[0014] 2. The high-speed motor rotor lead and its fixing structure of the present invention, the rotor winding connector is fixed to the hollow shaft end, and after being connected to the cable and copper busbar in the center hole of the hollow shaft end, the lead wire can be connected to the fastener, and the rotor winding connector adopts a special structure of the hole support and the end fixing seat to lead the three-phase copper busbar to the fastener, taking into account the assembly function, and realizing the reliable connection of the slip ring and the rotor lead wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a high-speed motor rotor lead and its fixing structure proposed by the present invention;

[0016] Figure 2 A schematic diagram of the lead-out wire connection structure of a high-speed motor rotor lead and its fixing structure proposed by the present invention;

[0017] Figure 3 A schematic diagram of the lead wire structure of a high-speed motor rotor lead wire and its fixing structure proposed by the present invention;

[0018] Figure 4 This is a schematic diagram of the structure of a rotor winding connector of a high-speed motor rotor lead and its fixing structure proposed by the present invention.

[0019] In the figure: 1. lead wire; 2. cable; 3. first copper bar; 4. second copper bar; 5. docking sleeve; 6. hollow shaft end; 7. slip ring; 8. rotor winding connector; 9. first end fixing seat; 10. second end fixing seat; 11. in-hole support; 12. fastener; 13. embedded groove; 14. cable entry hole; 15. end connection row; 16. positioning hole. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Embodiment 1, refer to Figure 3 A high-speed motor rotor lead and its fixing structure include a lead wire 1, wherein the lead wire 1 includes a cable 2, a first copper bar 3 and a second copper bar 4 which are adjacently distributed, the cable 2 is arranged between the first copper bar 3 and the second copper bar 4, and the connection between the cable 2 and the first copper bar 3 and the connection between the cable 2 and the second copper bar 4 are both connected with a docking sleeve 5.

[0022] In this embodiment, the cable 2 and the copper busbar are connected together. Since the copper busbar has a large conductive density, a copper busbar with a smaller cross-section can meet the requirement of a large output current, thereby solving the problem that the lead wire 1 requires a large diameter, but the hollow shaft end 6 is limited and its aperture cannot be increased. In addition, the lead wire 1 can also meet the connection between the winding end and the slip ring 7 end.

[0023] Example 2, refer to Figures 1 to 4 A high-speed motor rotor lead and its fixing structure include a hollow shaft end 6, a slip ring 7 is arranged on the outer wall of one end of the hollow shaft end 6, and a rotor winding connector 8 is fixedly connected to the inner wall of the other end of the hollow shaft end 6, the rotor winding connector 8 includes a first end fixing seat 9, a second end fixing seat 10 and an in-hole support member 11, and the in-hole support member 11 is fixedly connected between the first end fixing seat 9 and the second end fixing seat 10, and the outer wall of one side of the slip ring 7 is fixedly connected with fasteners 12 distributed at equal distances.

[0024] In this embodiment, the rotor winding connector 8 is fixed to the hollow shaft end 6. After being connected to the cable 2 and the copper busbar in the center hole of the hollow shaft end 6, the lead wire 1 can be connected to the fastener 12. In addition, the rotor winding connector 8 adopts a special structure of the hole support 11 and the end fixing seat to lead the three-phase copper busbar to the fastener 12, taking into account the assembly function and realizing the reliable connection between the slip ring 7 and the rotor lead wire 1.

[0025] Reference Figure 4 The outer walls of the first end fixing seat 9 and the second end fixing seat 10 are both provided with an embedding groove 13, and the outer walls of the first end fixing seat 9 and the second end fixing seat 10 are provided with glue pouring grooves distributed at equal distances on one side of the embedding groove 13.

[0026] Reference Figure 1 One end of the outer wall of the hollow shaft end 6 is provided with cable entry holes 14 which are distributed at equal distances.

[0027] Reference Figure 2A positioning hole 16 is opened at the center of the outer wall of one side of the slip ring 7, and the hollow shaft end 6 is arranged and connected to the inner wall of the positioning hole 16.

[0028] Reference Figure 1 An end connecting row 15 is riveted to the outer wall of one end of the second copper row 4.

[0029] Working principle: The method for fixing the lead wire 1 of the rotor winding of a high-power wind turbine generator is carried out through the following steps:

[0030] In the first step, the end connecting bar 15 is manufactured and inserted into the shaft hole of the hollow shaft end 6 after being riveted and welded with the second copper bar 4 .

[0031] In the second step, according to the hole diameter of the hollow shaft end 6, a rotor winding connector 8 is made to be embedded in the hole. The first end fixing seat 9, the second end fixing seat 10 and the support member 11 in the hole inside the rotor winding connector 8 are connected as a whole and inserted into the shaft hole and adjusted in the circumferential direction to ensure that the end connection row 15 is embedded in the groove 13 and is in phase with the corresponding slip ring 7.

[0032] The third step is to insert a fixing piece into the embedding groove 13 of the end fixing seat, so that the first end fixing seat 9, the second end fixing seat 10, the in-hole support piece 11 and the end connecting row 15 are completely fixed.

[0033] The fourth step is to adjust the length of the lead wire 1 to ensure simultaneous connection with the fastener 12 and both ends of the rotor winding connector 8, and rivet and weld the lead wire 1 to the rotor winding connector 8.

[0034] The fifth step is to pour insulating glue into the shaft hole of the hollow shaft end 6. The insulating glue is poured into the gap in the shaft hole of the hollow shaft end 6 through the glue pouring groove to firmly combine the end connecting row 15 and the lead wire 1 with the hollow shaft end 6. After pouring the insulating glue, the motor should be sent to the oven for baking to firmly combine the insulating glue with each component.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-speed motor rotor lead wire, comprising a lead wire (1), characterized in that: The lead-out line (1) comprises a cable (2), a first copper bar (3) and a second copper bar (4) which are arranged adjacent to each other; the cable (2) is arranged between the first copper bar (3) and the second copper bar (4); and a butt joint (5) is connected to the connection between the cable (2) and the first copper bar (3) and the connection between the cable (2) and the second copper bar (4).

2. A fixing structure for high-speed motor rotor leads according to claim 1, characterized in that: The invention comprises a hollow shaft end (6), wherein a slip ring (7) is arranged on the outer wall of one end of the hollow shaft end (6), and a rotor winding connecting piece (8) is fixedly connected to the inner wall of the other end of the hollow shaft end (6), wherein the rotor winding connecting piece (8) comprises a first end fixing seat (9), a second end fixing seat (10) and an in-hole support piece (11), and the in-hole support piece (11) is fixedly connected between the first end fixing seat (9) and the second end fixing seat (10), and the outer wall of one side of the slip ring (7) is fixedly connected to fasteners (12) distributed at equal distances.

3. A fixing structure for high-speed motor rotor leads according to claim 2, characterized in that: The outer walls of the first end fixing seat (9) and the second end fixing seat (10) are both provided with embedding grooves (13), and the outer walls of the first end fixing seat (9) and the second end fixing seat (10) are provided with glue-filling grooves distributed at equal distances on one side of the embedding grooves (13).

4. A fixing structure for high-speed motor rotor leads according to claim 2, characterized in that: One end of the outer wall of the hollow shaft end (6) is provided with cable entry holes (14) distributed at equal distances.

5. The fixing structure of the high-speed motor rotor lead according to claim 2, characterized in that: A positioning hole (16) is provided at the center of the outer wall of one side of the slip ring (7), and the hollow shaft end (6) is arranged and connected to the inner wall of the positioning hole (16).

6. A fixing structure for high-speed motor rotor leads according to claim 1, characterized in that: An end connection bar (15) is riveted to the outer wall of one end of the second copper bar (4).

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