A yaw collector ring rotor structure

Abstract

The present invention discloses a yaw collector ring rotor structure, including a center tube and a plurality of slip rings; the center tube is rotatably arranged between the top plate and the bottom plate of the collector ring, and a communication cable through hole is provided in the middle of the center tube; the slip rings are arranged at intervals along the axis direction of the center tube, and the slip rings can rotate synchronously with the center tube coaxially. The yaw collector ring rotor structure disclosed by the present invention adopts sliding bearings for positioning at the bottom and three smaller-sized bearings for positioning at the top, which occupies a small space, increases the size of the center tube, and increases the space for laying communication cables. In addition, the center tube rotates together with the slip rings, and the slip rings are all in contact with the insulating sleeves, which ensures the stability of the rotation and improves the coaxiality between the slip rings. The terminal and the slip ring are riveted, and the structure is simple and easy, and the connection is firm and reliable.

Description

Technical Field

[0001] The invention relates to the field of yaw collector rings, and in particular to a yaw collector ring rotor structure. Background Art

[0002] With the continuous development of wind power generation systems in my country, the wind power industry has higher requirements for the reliability and power generation efficiency of wind turbines. In order to solve the problem of severe twisting and wear of power cables caused by cabin yaw, yaw collector rings have gradually been favored by users.

[0003] The Chinese invention patent (CN109737018A) discloses a yaw collector ring in the slip ring assembly and wind turbine generator set. The center tube is fixed between the top plate and the bottom plate of the collector ring. The collector ring rotor rotates relative to the center tube. The collector ring is positioned by two large upper and lower bearings. A communication cable through hole is set in the center tube. However, due to the large number of communication cables and the large size of the plugs on the communication cables, the inner diameter of the center tube needs to be increased to meet the needs of laying communication cables. This will inevitably lead to the increase of the upper and lower bearings, and further increase the upper and lower bearing chambers, which is difficult to arrange in a limited space. Summary of the invention

[0004] The present invention provides a yaw collector ring rotor structure, which solves the problem that large-sized communication cables are difficult to lay.

[0005] A yaw collector ring rotor structure comprises a central tube and a plurality of slip rings;

[0006] The central tube is rotatably arranged between the top plate and the bottom plate of the collector ring, and a communication cable passage hole is arranged in the middle of the central tube;

[0007] The slip rings are coaxially arranged along the axis direction of the central tube, the slip rings do not contact each other, and the slip rings can rotate synchronously with the central tube coaxially.

[0008] Furthermore, a circular bearing seat is provided at one end of the center tube close to the top plate, and at least three fixing rods are provided between the top plate and the bottom plate. The fixing rods are provided with locating bearings, and the locating bearings are abutted against the bearing seat. The center of the circle where the locating bearing and the bearing seat contact point are located falls on the axis of the center tube.

[0009] Furthermore, a sliding bearing is provided between the central tube and the bottom plate.

[0010] Furthermore, it also includes an insulating pull rod, a tray perpendicular to the axis of the central tube is provided on the central tube, a mounting hole is provided on the inner circumference of the slip ring, the insulating pull rod passes through the mounting hole and is installed between the bearing seat and the tray, an insulator is provided between the top plate and the slip ring, insulators are provided between the slip rings, and an insulator is provided between the bottom plate and the slip ring.

[0011] Furthermore, a groove is provided on the outer periphery of the central tube, the tray is annular, a block is provided on the inner periphery of the tray, the block is inserted into the groove, a ring is provided on the central tube, the ring is interference fit with the central tube, and the ring is connected to the tray by bolts.

[0012] Furthermore, a cylindrical surface on which the collar is mounted is provided on the central tube, and a diameter of the cylindrical surface is smaller than an outer diameter of the central tube.

[0013] Furthermore, it also includes an insulating sleeve, which is sleeved outside the central tube, the inner periphery of the insulating sleeve is connected to the outer periphery of the sleeve ring, and the inner periphery of the slip ring is provided with three connecting parts, each of which is provided with a positioning surface, and the positioning surfaces are all in contact with the insulating sleeve.

[0014] Furthermore, a connecting portion is provided on the inner periphery of the slip ring, an assembly hole is provided on the connecting portion, and one end of the terminal is installed in the assembly hole with an interference fit.

[0015] Furthermore, the bottom end of the assembly hole is conical, the terminal is inserted into the assembly hole and extends out of the assembly hole, and the protruding portion of the terminal is riveted flat in the assembly hole.

[0016] Furthermore, a groove is provided on the outer circumference of the slip ring, and the groove is not perpendicular to the rotation plane of the slip ring.

[0017] The invention discloses a yaw collector ring rotor structure, which optimizes the structure of the center tube and the slip ring, increases the size of the center tube, and increases the space for laying communication cables. In addition, the center tube and the slip ring rotate together, and the slip rings are all in contact with the insulating sleeve, which ensures the stability of rotation and improves the coaxiality between the slip rings. The terminal and the slip ring are riveted, which has a simple and easy structure and a firm and reliable connection. The rotor is positioned by a sliding bearing at the bottom and a small bearing at the top, which occupies a small space and is highly economical. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the yaw collector ring rotor structure according to an embodiment of the present invention;

[0020] Figure 2 A cross-sectional view of the yaw collector ring rotor structure according to an embodiment of the present invention;

[0021] Figure 3 It is a schematic cross-sectional view of a center tube of a yaw collector ring rotor structure according to an embodiment of the present invention;

[0022] Figure 4 A top view of a central tube of a yaw collector ring rotor structure according to an embodiment of the present invention;

[0023] Figure 5 It is an axonometric view of the center tube of the yaw collector ring rotor structure according to an embodiment of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the clamping groove on the center tube of the yaw collector ring rotor structure according to an embodiment of the present invention;

[0025] Figure 7 A schematic diagram of a tray of a yaw collector ring rotor structure according to an embodiment of the present invention;

[0026] Figure 8 It is a horizontal cross-sectional schematic diagram of the yaw collector ring rotor structure according to an embodiment of the present invention;

[0027] Fig. 9 A schematic diagram of a slip ring of a yaw collector ring rotor structure according to an embodiment of the present invention;

[0028] Fig.10 A schematic diagram of the connection between the slip ring and the terminal of the yaw collector ring rotor structure according to an embodiment of the present invention;

[0029] Fig.11 for Fig.10 Enlarged view of part A.

[0030] In the figure: 1. center tube; 2. slip ring; 3. top plate; 4. bottom plate; 5. bearing seat; 6. fixing rod; 7. positioning bearing; 8. sliding bearing; 9. insulating pull rod; 10. tray; 11. insulator; 12. sleeve ring; 13. insulating sleeve; 14. terminal; 15. bearing seat positioning stop; 16. sliding bearing mounting surface; 101. slot; 102. block; 201. mounting hole; 202. slot. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0032] like Figure 1 , Figure 2 As shown, a yaw collector ring rotor structure includes a center tube 1 and multiple slip rings 2; the center tube 1 is rotatably arranged between a top plate 3 and a bottom plate 4 of the collector ring, a communication cable through hole is provided in the middle of the center tube 1, and a communication cable is arranged in the hole; the slip rings 2 are arranged at intervals along the axial direction of the center tube 1, and the slip rings 2 can rotate coaxially and synchronously with the center tube 1.

[0033] The signal line connector HARTING has a large outline size and needs to pass through the center tube during assembly. Generally, the use environment limits the size of the collector ring, and the collector ring cannot be enlarged to increase the inner diameter of the center tube. In addition to the limiting factors of the use environment, the overall enlargement of the collector ring will greatly increase the cost. Enlarging the collector ring as a whole just to improve the passability of the communication cable is not worth the loss.

[0034] There is no bearing between the slip ring and the center tube, so that the center tube and the slip ring rotate together. The space saved after removing the bearing is used to enlarge the size of the center tube, increase the inner diameter of the center tube, and enhance the ability to accommodate cables.

[0035] A circular bearing seat 5 is provided at one end of the center tube 1 close to the top plate 3. Three fixing rods 6 are provided between the top plate 3 and the bottom plate 4. Positioning bearings 7 are provided on the fixing rods 6. The positioning bearings 7 are in contact with the bearing seat 5. The center of the circle where the contact point between the positioning bearing 7 and the bearing seat 5 is located falls on the axis of the center tube 1. A sliding bearing 8 is provided between the center tube 1 and the bottom plate 4. Both the positioning bearing 7 and the sliding bearing 8 are maintenance-free sliding bearings. The positioning bearings 7 are sleeved on the fixing rod 6 and are three small-sized sliding bearings. The outer surface of the positioning bearing 7 is in contact with the bearing seat 5. The bearing seat 5 rotates with the center tube 1. The three positioning bearings 7 ensure the coaxiality of the rotation.

[0036] After the center tube rotates together with the slip ring, three positioning bearings 7 are provided to ensure the stability of the rotation of the center tube and the slip ring. The three positioning bearings 7 cooperate with the sliding bearing 8 to make the rotation of the center tube and the slip ring more stable.

[0037] Furthermore, it also includes an insulating pull rod 9, such as Figure 3-5 As shown, a tray 10 perpendicular to the axis of the central tube 1 is provided on the central tube 1. Fig. 9 As shown, a mounting hole 201 is provided on the inner periphery of the slip ring 2 , the insulating pull rod 9 passes through the mounting hole 201 and is installed between the bearing seat 5 and the tray 10 , and insulators 11 are provided between the top plate 3 , the bottom plate 4 and the slip ring 2 .

[0038] like Figure 6 , Figure 7 As shown, a groove 101 is provided on the outer periphery of the central tube 1, the tray 10 is annular, a clamping block 102 is provided on the inner periphery of the tray 10, the clamping block 102 is inserted into the groove 101, a collar 12 is provided on the central tube 1, the collar 12 is interference fit with the central tube 1, and the collar 12 is connected to the tray 10 by bolts.

[0039] The center tube 1 is provided with a cylindrical surface 103 for mounting the collar 12, and the diameter of the cylindrical surface 103 is smaller than the outer diameter of the center tube 1. The collar 12 is mounted on the cylindrical surface 103 to fix the radial position of the collar, thereby making the connection between the tray 10 and the center tube 1 more stable.

[0040] In this embodiment, the collar 12 is first heated and installed on the cylindrical surface 103 of the central tube 1, and then the tray 10 is clamped on the central tube 1 through the cooperation of the clamping block 102 and the clamping groove 101, and finally the collar 12 is fixedly connected to the tray 10 by bolts. The clamping and the bolts 101 cooperate to prevent the tray from relative displacement in the radial and axial directions relative to the central tube, so as to achieve the purpose of anti-slip fastening.

[0041] Furthermore, if Figure 8 As shown, it also includes an insulating sleeve 13, which is sleeved outside the central tube 1, and the inner periphery of the insulating sleeve 13 is connected to the outer periphery of the sleeve ring 12, as shown in FIG. Fig. 9 As shown, three connecting parts 202 are provided on the inner circumference of the slip ring 2 , and positioning surfaces 203 are provided on the connecting parts 202 . The positioning surfaces 203 are in contact with the insulating sleeve 13 .

[0042] The performance of the collector ring rotor directly affects the safety of the entire generator set and the power generation efficiency. The rotor includes multiple independent slip rings, each of which corresponds to one phase of the wind turbine set, so the slip rings must have reliable insulation performance and corresponding precision coaxiality. The inner circumference of the slip ring 2 is in contact with the insulating sleeve 13 through the positioning surface 203 to ensure the coaxiality of each slip ring to the greatest extent.

[0043] The outer circumference of the slip ring 2 is provided with a slot 202, which is not perpendicular to the rotation plane of the slip ring 2. The slot 202 is an oblique slot, which can increase the heat dissipation area of ​​the slip ring on the one hand, and improve the carbon removal capacity of the slip ring on the other hand.

[0044] The connecting portion 202 is provided with an assembly hole, and one end of the terminal 14 is installed in the assembly hole with an interference fit. Fig.10 , Fig.11 As shown, the bottom end of the assembly hole is tapered, the terminal 14 is inserted into the assembly hole and extends out of the assembly hole, and the extended portion of the terminal 14 is riveted flat in the assembly hole. In the figure, b is the cone height, d is the diameter of the terminal installation end, D is the major diameter of the tapered hole of the slip ring, and S is the minimum length of the terminal extending out of the assembly hole.

[0045] In this embodiment, the installation process of the terminal is as follows: first, the terminal is cold-installed into the slip ring, and then the part of the terminal that extends out of the slip ring S is riveted flat. The terminal is compressed and expanded to fill the space between the conical surface of the slip ring and the terminal, so as to achieve the purpose of close contact and fixation. Before installation, the minimum length of the terminal extending out of the assembly hole needs to be designed and calculated, and S needs to meet the following conditions:

[0046]

[0047] The terminal 14 is installed in the assembly hole with an interference fit and is installed by riveting, which can avoid the gap between the terminal and the slip ring to the greatest extent and is not easy to loosen.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A yaw collector ring rotor structure, characterized in that: It comprises a central tube (1) and a plurality of slip rings (2); The central tube (1) is rotatably arranged between the top plate (3) and the bottom plate (4) of the collector ring, and a communication cable passage hole is provided in the middle of the central tube (1); The slip ring (2) is coaxially arranged along the axis direction of the central tube (1), the slip rings (2) do not contact each other, and the slip ring (2) can rotate synchronously with the central tube (1) coaxially; A circular bearing seat (5) is provided at one end of the center tube (1) close to the top plate (3); at least three fixing rods (6) are provided between the top plate (3) and the bottom plate (4); each of the fixing rods (6) is provided with a locating bearing (7); each of the locating bearings (7) is in contact with the bearing seat (5); and the center of a circle where the locating bearing (7) and the bearing seat (5) are in contact is located on the axis of the center tube (1); It also includes an insulating pull rod (9), a tray (10) perpendicular to the axis of the central tube (1) is provided on the central tube (1), a mounting hole (201) is provided on the inner circumference of the slip ring (2), the insulating pull rod (9) passes through the mounting hole (201) and is installed between the bearing seat (5) and the tray (10), an insulator (11) is provided between the top plate (3) and the slip ring (2), an insulator (11) is provided between the slip rings (2), and an insulator (11) is provided between the bottom plate (4) and the slip ring (2); The outer circumference of the central tube (1) is provided with a slot (101); the tray (10) is annular; the inner circumference of the tray (10) is provided with a block (102); the block (102) is inserted into the slot (101); the central tube (1) is provided with a collar (12); the collar (12) and the central tube (1) are interference fit; the collar (12) and the tray (10) are connected by bolts; It also comprises an insulating sleeve (13), the insulating sleeve (13) being sleeved outside the central tube (1), the inner periphery of the insulating sleeve (13) being connected to the outer periphery of the sleeve ring (12), the inner periphery of the slip ring (2) being provided with three connecting parts (202), the connecting parts (202) being provided with positioning surfaces (203), the positioning surfaces (203) being in contact with the insulating sleeve (13); The connecting portion (202) is provided with an assembly hole, and one end of the terminal (14) is installed in the assembly hole with an interference fit; The bottom end of the assembly hole is conical, the terminal (14) is inserted into the assembly hole and extends out of the assembly hole, and the protruding portion of the terminal (14) is riveted flat in the assembly hole; The outer circumference of the slip ring (2) is provided with a groove, and the groove is not perpendicular to the rotation plane of the slip ring (2).

2. A yaw collector ring rotor structure according to claim 1, characterized in that: A sliding bearing (8) is provided between the central tube (1) and the bottom plate (4).

3. The yaw collector ring rotor structure according to claim 1, characterized in that: The center tube (1) is provided with a cylindrical surface (103) on which the collar (12) is mounted, and the diameter of the cylindrical surface (103) is smaller than the outer diameter of the center tube (1).

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