Wind driven generator end cover with good insulating property

Abstract

The utility model relates to the technical field of generator end covers, and discloses a wind driven generator end cover with good insulation performance, which comprises a generator casing, an end cover is arranged at the top of the generator casing, an installation groove is arranged in the end cover, an insulation ring is fixedly connected in the installation groove through a spin lock mechanism, and the insulation ring is fixedly connected with the top of the generator casing. The spin lock mechanism comprises fixed plates mounted on the two sides of the insulating ring and movable grooves formed in the inner walls of the two sides of the mounting groove, so that current circulation between a bearing on the wind driven generator and an upper end cover of the wind driven generator can be blocked to a certain extent through the insulating performance of the insulating assembly, and the end cover can be effectively prevented from generating current; the insulation effect of the end cover is greatly improved, and the insulation ring can be quickly fixed and installed through the spin lock mechanism, so that the installation and disassembly of the insulation ring by an operator are greatly facilitated, and the replacement and maintenance efficiency of the insulation ring by a maintainer is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of generator end covers, in particular to a wind generator end cover with good insulation performance. Background Art

[0002] A wind turbine is an electrical device that converts wind energy into mechanical work, which drives the rotor to rotate and ultimately outputs alternating current. A wind turbine generally consists of a rotor, generator (including its components), stabiliser (tail), tower, speed limiter, and energy storage device. During operation, the rotating shaft cuts through the magnetic field, generating shaft voltage and current. When this current accumulates to a certain level, it can be transferred through the bearings to the wind turbine's end caps, causing electrical leakage between the end caps and the wind turbine casing, impacting operation and safety. The current solution primarily involves the use of insulated bearings to prevent this current from being transferred to the end caps.

[0003] For example, the Chinese patent application number 201921503490.1 is an improved insulating end cover of a wind turbine. This patent sets an insulating spacer ring to at least a certain extent block the current flow between the upper bearing of the wind turbine and its upper end cover, so that the wind turbine has better insulation performance, reduces safety hazards, reduces dependence on insulating bearings, and sets insulating fasteners to make the retaining ring less likely to loosen, while further improving the insulation performance of the end cover.

[0004] However, the above patent requires the use of bolts to fix the insulating ring when installing it, which results in a lot of installation and disassembly time, thus seriously affecting the efficiency of the operator in replacing and inspecting the insulating ring. Utility Model Content

[0005] The purpose of the utility model is to provide a wind turbine end cover with good insulation performance, which solves the problems raised in the background technology.

[0006] An embodiment of the present application provides a wind turbine end cover with good insulation performance, including a generator casing, an end cover is installed on the top of the generator casing, an installation groove is opened inside the end cover, and an insulating ring is fixedly connected to the inside of the installation groove through a rotating lock mechanism.

[0007] By adopting the above technical solution, the end cover of the device has stronger insulation performance when in use, thereby greatly improving the practicality of the device.

[0008] Optionally, the rotating lock mechanism includes a fixed plate installed on both sides of the insulating ring and a movable groove opened on the inner wall on both sides of the installation groove, the two ends of the movable groove are respectively provided with a U-shaped opening and a positioning hole, and an elastic positioning rod is installed inside the fixed plate.

[0009] By adopting the above technical solution, the device can quickly fix the insulating ring through the rotating lock mechanism, thereby greatly facilitating the installation and removal of the insulating ring by the operator, and greatly improving the replacement and maintenance efficiency of the insulating ring by the maintenance personnel.

[0010] Optionally, the elastic positioning rod includes a fixing tube, the bottom of the inner cavity of the fixing tube is fixedly connected to a locking spring, and the top of the locking spring is fixedly connected to the positioning rod.

[0011] By adopting the above technical solution and utilizing the elastic effect of the locking spring, the locking effect of the device is improved.

[0012] Optionally, the interior of the insulating ring and the end cover are both provided with an axial hole adapted to the rotating shaft, and the inner wall of the axial hole is provided with an insulating sleeve.

[0013] By adopting the above technical solution, the insulation performance of the device can be further improved by utilizing the insulation effect of the insulation sleeve.

[0014] Optionally, a plurality of heat dissipation holes are provided at the bottom of the inner cavity of the mounting slot.

[0015] By adopting the above technical solution, the heat dissipation efficiency of the device can be accelerated by utilizing the heat dissipation holes.

[0016] Optionally, the interior of the insulating ring is filled with insulating dry gas.

[0017] By adopting the above technical solution, the insulating performance of the insulating ring can be further improved by utilizing insulating dry gas.

[0018] Optionally, the insulating dry gas is a mixture of nitrogen and carbon dioxide.

[0019] By adopting the above technical solution, the cost of the insulating dry gas of the device is lowered, thereby greatly improving the practicality of the device.

[0020] Optionally, the insulating sleeve is made of rubber material.

[0021] By adopting the above technical solution and utilizing the high insulation property of the rubber material, the insulation property of the insulating sleeve is improved.

[0022] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0023] 1. The technical solution of this application provides an insulating sleeve and an insulating ring, so that the device can block the current flow between the upper bearing of the wind turbine and its upper end cover to a certain extent through the insulation performance of the insulating component, thereby effectively preventing the end cover from generating current, thereby greatly improving the insulation effect of the end cover.

[0024] 2. The technical solution of the present application provides an end cover, an installation groove, an insulating ring, a fixing plate, a movable groove, a U-shaped opening, a positioning hole, an elastic positioning rod, a fixing cylinder, a positioning rod and a locking spring, so that the device can quickly fix and install the insulating ring through a rotating lock mechanism, thereby greatly facilitating the operator's installation and removal of the insulating ring, and thus greatly improving the maintenance personnel's efficiency in replacing and repairing the insulating ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0026] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a wind turbine end cover with good insulation performance according to the present invention;

[0027] Figure 2 This is a schematic diagram of the three-dimensional structure of the interior of a fixed shaft of a wind turbine end cover with good insulation performance according to the utility model;

[0028] Figure 3 This is a three-dimensional structural diagram of the connection part between the driving gear and the sliding tooth plate of a wind turbine end cover with good insulation performance according to the utility model;

[0029] Figure 4 This utility model is a wind turbine end cover with good insulation performance Figure 1 Enlarged view of point A in the middle.

[0030] In the figure: 1. Generator casing; 2. End cover; 3. Insulating ring; 4. Fixing plate; 5. Movable groove; 6. U-shaped opening; 7. Positioning hole; 8. Elastic positioning rod; 801. Fixing cylinder; 802. Locking spring; 803. Positioning rod; 9. Mounting groove; 10. Heat dissipation hole; 11. Insulating sleeve; 12. Shaft hole. DETAILED DESCRIPTION

[0031] See also Figure 1-4 The utility model provides a technical solution: an end cover of a wind turbine with good insulation performance, comprising a generator casing 1, an end cover 2 is installed on the top of the generator casing 1, an installation groove 9 is opened inside the end cover 2, and an insulating ring 3 is fixedly connected to the inside of the installation groove 9 through a rotating lock mechanism.

[0032] By adopting the above technical solution, the end cover 2 of the device has a strong insulation performance when in use, thereby greatly improving the practicality of the device.

[0033] In the embodiments of the present application, Figure 2-3As shown, the rotating lock mechanism includes a fixed plate 4 installed on both sides of the insulating ring 3 and a movable groove 5 opened on the inner wall of both sides of the installation groove 9. The two ends of the movable groove 5 are respectively provided with a U-shaped opening 6 and a positioning hole 7, and an elastic positioning rod 8 is installed inside the fixed plate 4.

[0034] By adopting the above technical solution, the device can quickly fix the insulating ring 3 through the rotating lock mechanism, thereby greatly facilitating the installation and removal of the insulating ring 3 by the operator, and greatly improving the replacement and maintenance efficiency of the insulating ring 3 by the maintenance personnel.

[0035] In the embodiments of the present application, Figure 4 As shown, the elastic positioning rod 8 includes a fixing tube 801 , a locking spring 802 is fixedly connected to the bottom of the inner cavity of the fixing tube 801 , and a positioning rod 803 is fixedly connected to the top of the locking spring 802 .

[0036] By adopting the above technical solution and utilizing the elastic effect of the locking spring 802, the locking effect of the device is improved.

[0037] In the embodiments of the present application, Figure 1-2 As shown, both the insulating ring 3 and the end cover 2 are provided with an axial hole 12 adapted to the rotating shaft, and an insulating sleeve 11 is provided on the inner wall of the axial hole 12 .

[0038] By adopting the above technical solution, the insulation performance of the device can be further improved by utilizing the insulation effect of the insulation sleeve 11.

[0039] In the embodiments of the present application, Figure 2 As shown, a plurality of heat dissipation holes 10 are provided at the bottom of the inner cavity of the mounting slot 9 .

[0040] By adopting the above technical solution, the heat dissipation efficiency of the device can be accelerated by utilizing the heat dissipation holes 10 .

[0041] In the embodiments of the present application, Figure 3 As shown, the interior of the insulating ring 3 is filled with insulating dry gas.

[0042] By adopting the above technical solution, the insulating performance of the insulating ring 3 can be further improved by utilizing the insulating dry gas.

[0043] In an embodiment of the present application, the insulating dry gas is a mixture of nitrogen and carbon dioxide.

[0044] By adopting the above technical solution, the cost of the insulating dry gas of the device is lowered, thereby greatly improving the practicality of the device.

[0045] In the embodiments of the present application, Figure 1 As shown, the insulating sleeve 11 is made of rubber material.

[0046] By adopting the above technical solution and utilizing the high insulation property of the rubber material, the insulation property of the insulating sleeve 11 is improved.

[0047] During use, the operator can first press the positioning rod 803 to retract it into the fixed cylinder 801 by compressing the locking spring 802, and then insert the fixing plate 4 into the U-shaped opening 6. When the fixing plate 4 is inserted to the lowest end, rotate the insulating ring 3 so that the fixing plate 4 can slide along the movable groove 5. When the fixing plate 4 drives the fixing cylinder 801 to move to the position of the positioning hole 7, the positioning rod 803 will pop out quickly under the elastic action of the locking spring 802, so that the insulating ring 3 can be quickly fixed to the end cover 2, which greatly facilitates the operator to install and disassemble the insulating ring 3, and thus greatly improves the maintenance personnel's replacement and maintenance efficiency of the insulating ring 3. When the rotating shaft is working, the insulating properties of the insulating ring 3 and the insulating sleeve 11 can prevent the generation of current between the rotating shaft and the end cover 2 to a certain extent, thereby greatly improving the insulation effect of the end cover.

Claims

1. A wind turbine generator end cover with good insulation performance, comprising a generator housing (1), characterized in that: An end cover (2) is installed on the top of the generator casing (1), a mounting groove (9) is provided inside the end cover (2), and an insulating ring (3) is fixedly connected inside the mounting groove (9) via a rotating lock mechanism.

2. The wind turbine generator end cover with good insulation performance according to claim 1, characterized in that: The rotating lock mechanism comprises a fixed plate (4) mounted on both sides of the insulating ring (3) and a movable groove (5) provided on the inner walls of both sides of the mounting groove (9), wherein a U-shaped opening (6) and a positioning hole (7) are respectively provided at both ends of the movable groove (5), and an elastic positioning rod (8) is installed inside the fixed plate (4).

3. The wind turbine generator end cover with good insulation performance according to claim 2, characterized in that: The elastic positioning rod (8) comprises a fixing cylinder (801), the bottom of the inner cavity of the fixing cylinder (801) is fixedly connected to a locking spring (802), and the top of the locking spring (802) is fixedly connected to a positioning rod (803).

4. The wind turbine generator end cover with good insulation performance according to claim 1, characterized in that: The interiors of the insulating ring (3) and the end cover (2) are both provided with shaft holes (12) adapted to the rotating shaft, and the inner wall of the shaft hole (12) is provided with an insulating sleeve (11).

5. The wind turbine generator end cover with good insulation performance according to claim 1, characterized in that: The bottom of the inner cavity of the installation groove (9) is provided with a plurality of heat dissipation holes (10).

6. The wind turbine generator end cover with good insulation performance according to claim 1, characterized in that: The interior of the insulating ring (3) is filled with insulating dry gas.

7. The wind turbine generator end cover with good insulation performance according to claim 6, characterized in that: The insulating dry gas is a mixture of nitrogen and carbon dioxide.

8. The wind turbine generator end cover with good insulation performance according to claim 4, characterized in that: The insulating sleeve (11) is made of rubber material.

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