Yawing collecting ring of semi-direct-drive wind turbine generator

Abstract

A waterproof wire inlet mechanism and a waterproof wire outlet mechanism are arranged on the upper end face and the lower end face of a current collection mechanism respectively, an air inlet mechanism and an air outlet mechanism are arranged on the left end face and the right end face of the current collection mechanism respectively, the current collection mechanism comprises a sealing shell, and the sealing shell comprises two ventilation openings formed in the left side and the right side. The air leakage amount of the multiple rotor bus wire inlets in the sealing shell is reduced by the isolation assembly and the multiple isolation sheaths of the water-air separation structure, and the air leakage amount of the multiple bus bar wire outlets is reduced by the sealing gasket, so that a circulation air channel in which air can only enter from the left ventilation opening and exit from the right ventilation opening and the air flow is uniform is formed in the sealing shell; therefore, the heat dissipation efficiency and the heat dissipation uniformity are improved, and the rapid over-temperature of the part at the position caused by the poor heat dissipation effect at the local position is avoided; in addition, the isolation assembly and the isolation sheath can also prevent water drops from permeating into the current collection mechanism along the cable when encountering the water drops, so that the insulation strength of the internal conductive part is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation, and in particular to a yaw collector ring of a semi-direct-drive wind turbine set. Background Art

[0002] The yaw collector ring is a key component in a wind turbine, mainly used to support the normal operation of the yaw system of the wind turbine; the yaw system is responsible for adjusting the direction of the wind turbine blades so that they always face the direction of the wind to maximize the power generation efficiency. Through the setting of the yaw collector ring, the cable entanglement can be avoided when the yaw system adjusts the direction of the wind turbine blades.

[0003] The yaw collector ring is a device for transmitting electric energy inside the semi-direct-drive wind turbine. Due to the high full power of the semi-direct-drive wind turbine, the equipment itself has a voltage drop and will generate a large amount of heat. Under this condition, the insulating parts and plastic parts inside the collector ring will age and fail. The mechanical properties of the conductive parts will decrease, especially when the heat dissipation inside the collector ring is uneven, the heat dissipation effect will be worse, and some conductive parts will overheat because their heat dissipation efficiency is lower than that of other parts, causing the entire collector ring to shut down or some conductive parts to burn out. In addition, due to the influence of the external environment, there are water droplets from top to bottom inside the wind turbine. When these water droplets fall on the collector ring's line feed mechanism and penetrate into the collector ring from the line feed mechanism, the insulation strength of the internal parts of the collector ring will be reduced due to condensation, causing the entire collector ring to face the risk of short circuit. Summary of the invention

[0004] The problem to be solved by the present invention is to provide a yaw collector ring of a semi-direct drive wind turbine set which has high internal heat dissipation efficiency, good heat dissipation uniformity and can prevent water from penetrating into the interior.

[0005] The technical solution adopted by the present invention to solve the above-mentioned problem is: a yaw collector ring of a semi-direct-drive wind turbine, comprising a collector mechanism, an air inlet mechanism and an air outlet mechanism respectively arranged on the left and right end surfaces of the collector mechanism, a waterproof inlet mechanism arranged on the upper end surface of the collector mechanism, and an outlet mechanism arranged on the front end surface of the collector mechanism; The waterproof inlet mechanism includes a water-gas separation structure, which includes an isolation component arranged on the upper end surface of the collector mechanism and a plurality of isolation sheaths arranged on the isolation component; the outlet mechanism includes a plurality of busbars and sealing pads arranged on the busbars; The power collection mechanism includes a sealed shell, a circulating air duct arranged in the sealed shell, and a stator structure and a rotor structure arranged in the circulating air duct; the sealed shell includes two vents arranged on the left and right sides; the air inlet mechanism and the air outlet mechanism are respectively arranged at the two vents; the rotor structure includes a plurality of rotor busbars; the plurality of rotor busbars enter the sealed shell through the isolation sheath; the plurality of busbars enter the sealed shell through the sealing gasket; When the waterproof inlet mechanism encounters water droplets, the water droplets are blocked by the isolation sheath; when the air outlet mechanism is working, wind is sucked in from the air inlet mechanism and blown out from the air outlet mechanism after passing through the circulating air duct.

[0006] Compared with the prior art, the present invention provides a waterproof inlet mechanism on the upper end face of the power collection mechanism, and a outlet mechanism on the front end face, so as to connect with the cable of the wind turbine set; an air inlet mechanism and an air outlet mechanism are provided on the left and right end faces of the power collection mechanism, so as to improve the heat dissipation efficiency inside the power collection mechanism; wherein the power collection mechanism includes a sealed shell, the sealed shell includes two vents provided on the left and right sides, and the air leakage of multiple rotor busbar inlet ports in the sealed shell is reduced by the isolation components of the water-gas separation structure and multiple isolation sheaths, and the air leakage of multiple converging outlet ports is reduced by the sealing pad, so that A circulating air duct is formed in the sealed shell, which can only take in air from the left vent and exhaust air from the right vent, so that the stator structure and the rotor structure in the circulating air duct are subject to uniform airflow, thereby improving the heat dissipation efficiency and heat dissipation uniformity, avoiding the burning of components at a local position due to poor heat dissipation effect and the shutdown of the entire collector ring due to overheating; in addition, the isolation component and the isolation sheath can also prevent water droplets from penetrating into the collector mechanism along the cable when encountering water droplets, so that the insulation strength of the conductive components in the collector mechanism is better, avoiding the risk of short circuit of the collector ring.

[0007] The present invention provides a yaw collector ring of a semi-direct-drive wind turbine, wherein the waterproof wire-inlet mechanism comprises a rotor turntable, a rotor wiring enclosure and a short flange barrel; the rotor turntable comprises a wire-inlet hole and a cable sheath arranged in the wire-inlet hole; the cable of the wind turbine enters the waterproof wire-inlet mechanism through the cable sheath; the upper end of the short flange barrel is connected to the rotor turntable, and the lower end is connected to the rotor structure; the rotor wiring enclosure is connected to the lower end surface of the rotor turntable.

[0008] The present invention provides a yaw collector ring of a semi-direct-drive wind turbine set, wherein the cable sheath comprises a turntable fitting portion, a turntable limiting portion and a cable fitting portion which are arranged in sequence from bottom to top; the turntable fitting portion comprises a cable loose-fitting hole arranged inside and a turntable sealing convex ring arranged on the outer wall; the turntable limiting portion matches with the upper end surface of the rotor turntable; the cable fitting portion comprises a cable tight-fitting hole arranged inside; the outer wall of the turntable fitting portion matches with the line inlet hole, and the inner wall of the cable tight-fitting hole matches with the cable of the wind turbine set.

[0009] A yaw collector ring of a semi-direct-drive wind turbine of the present invention, wherein the isolation assembly comprises a raised circular ring arranged on the upper end surface of the collector mechanism, and an isolation disk arranged on the short flange cylinder; the isolation disk has a plurality of busbar holes; the isolation sheath is arranged in the busbar hole; The isolation disk includes a first annular groove arranged on the edge of the lower end surface, and the upper edge of the raised ring is inserted into the first annular groove; the rotor wiring enclosure includes a first folded edge arranged at the lower end; the first folded edge is arranged below the first annular groove and located on the outside of the raised ring.

[0010] The present invention provides a yaw collector ring of a semi-direct-drive wind turbine, wherein the isolation sleeve comprises an isolation disk limiting portion and an isolation disk matching portion arranged below the isolation disk limiting portion; the isolation disk limiting portion is arranged on the upper end surface of the isolation disk; the isolation disk matching portion matches the busbar hole; the isolation sleeve has a busbar tight-fitting hole; the busbar tight-fitting hole matches the rotor busbar.

[0011] The present invention provides a yaw collector ring of a semi-direct-drive wind turbine, wherein the rotor wiring enclosure includes a second folded edge arranged at the upper end, and the rotor turntable includes a second annular groove arranged at the edge of the lower end surface; the second folded edge is embedded in the second annular groove.

[0012] The present invention provides a yaw collector ring of a semi-direct-drive wind turbine, wherein the sealing shell further includes a frame and two door panels arranged on the front and rear end surfaces of the frame; the air inlet mechanism and the air outlet mechanism are respectively arranged on the left and right end surfaces of the frame; the frame includes a plurality of frame angle plates and a first L-shaped folded edge arranged along the edge of the frame angle plate, and the door panel includes a door panel body, a second L-shaped folded edge arranged along the peripheral wall of the door panel body, and a sealing strip arranged along the peripheral wall of the door panel body; the first L-shaped folded edge cooperates with the sealing strip, and the second L-shaped folded edge cooperates with the frame angle plate.

[0013] A yaw collector ring of a semi-direct-drive wind turbine of the present invention, wherein the door plate on the front end surface of the frame has a plurality of busbar inlet holes; the sealing gasket is arranged in the busbar inlet holes; the busbar enters the collector mechanism through the sealing gasket.

[0014] The present invention provides a yaw collector ring for a semi-direct-drive wind turbine, wherein the rotor structure comprises a plurality of layers of slip ring assemblies arranged from top to bottom; the stator structure comprises a plurality of layers of arc-shaped row assemblies arranged from top to bottom, carbon brushes are arranged circumferentially on each layer of the arc-shaped row assemblies, and a transfer row is provided on each layer of the arc-shaped row assemblies; the carbon brushes are in contact with the slip ring assemblies so as to conduct the current on the slip ring assemblies to the arc-shaped row assemblies.

[0015] A yaw collector ring of a semi-direct-drive wind turbine of the present invention, wherein the air inlet mechanism comprises an air inlet hole and at least one filter plate arranged at the air inlet hole; the air inlet hole covers a multi-layer slip ring assembly, a multi-layer arc row assembly, a multi-layer carbon brush and a multi-layer adapter row arranged from top to bottom in the height direction; the air inlet hole covers the arc row assembly in the width direction; The air outlet mechanism includes an air outlet and a fan arranged in the air outlet; the air outlet covers a multi-layer slip ring assembly, a multi-layer arc row assembly, a multi-layer carbon brush and a multi-layer adapter row arranged from top to bottom in the height direction; the air outlet covers the arc row assembly in the width direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the present invention from a side viewing angle; Figure 2 It is a three-dimensional schematic diagram of the present invention from another side viewing angle; Figure 3 is an enlarged schematic diagram of the busbar and the sealing gasket; Figure 4 It is a three-dimensional schematic diagram of the internal structure of the present invention from another side viewing angle; Figure 5 It is a cross-sectional schematic diagram from one viewing angle of the present invention; Figure 6 It is an enlarged schematic diagram of the cooperation between the frame and the door panel; Figure 7 It is a cross-sectional schematic diagram from another viewing angle of the present invention; Figure 8 It is an enlarged schematic diagram of the water-gas separation structure; Fig. 9 is an enlarged schematic diagram of the cooperation between the second folded edge and the second annular groove; Fig.10 is a three-dimensional schematic diagram of a cable sheath; Fig.11 is a schematic cross-sectional view of a cable sheath; Fig.12 is a three-dimensional schematic diagram of an isolation sheath; Fig.13 Schematic diagram of fluid simulation of the present invention. DETAILED DESCRIPTION

[0017] Before describing in detail any embodiment of the present invention, it should be understood that the present invention is not limited in its application to the construction and arrangement details of the components described below or illustrated in the following figures. The present invention can have other embodiments and can be practiced or carried out in various ways. In addition, it should be understood that the words and terms used here are for descriptive purposes and should not be considered restrictive. The use of "including" or "having" and its variations herein is intended to cover the items and their equivalents and additional items displayed below. Unless otherwise specified or limited, the terms "install", "connect", "support" and "couple" and their variations are widely used and cover direct installation and indirect installation, connection, support and connection. In addition, "connect" and "couple" are not limited to physical or mechanical connections or connections.

[0018] Furthermore, on the first aspect, in the disclosure of the present invention, the orientation or positional relationship indicated by terms such as "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore the above terms cannot be understood as limitations on the present invention; on the second aspect, the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" cannot be understood as a limitation on the quantity.

[0019] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

[0020] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0021] See also Figure 1-13A yaw collector ring of a semi-direct-drive wind turbine shown in the figure comprises a collector mechanism 1, an air inlet mechanism 2 and an air outlet mechanism 3 respectively arranged on the left and right end surfaces of the collector mechanism 1, a waterproof inlet mechanism 4 arranged on the upper end surface of the collector mechanism 1, and an outlet mechanism 5 arranged on the front end surface of the collector mechanism 1; the waterproof inlet mechanism 4 comprises a water-gas separation structure 41, the water-gas separation structure 41 comprises an isolation component 411 arranged on the upper end surface of the collector mechanism 1 and a plurality of isolation sheaths 412 arranged on the isolation component 411; the outlet mechanism 5 comprises a plurality of busbars 51 and a sealing pad 52 arranged on the busbars 51; the collector mechanism 1 comprises a sealing shell 11, a sealing shell 11 arranged on the sealing shell 1 1 and a stator structure 13 and a rotor structure 14 arranged in the circulating air duct 12; the sealed shell 11 includes two vents 111 arranged on the left and right sides; the air inlet mechanism 2 and the air outlet mechanism 3 are respectively arranged at the two vents 111; the rotor structure 14 includes a plurality of rotor busbars 141; the plurality of rotor busbars 141 enter the sealed shell 11 through the isolation sleeve 412; a plurality of busbars 51 enter the sealed shell 11 through the sealing gasket 52; when the waterproof inlet mechanism 4 encounters water droplets, the water droplets are blocked by the isolation sleeve 412; when the air outlet mechanism 3 is working, the wind is sucked in from the air inlet mechanism 2, and blown out from the air outlet mechanism 3 after passing through the circulating air duct 12.

[0022] In actual use, the present invention sets an outlet mechanism 5 at the front end face of a waterproof inlet mechanism 4 on the upper end face of the power collection mechanism 1 to facilitate connection with the wind turbine cable; an air inlet mechanism 2 and an air outlet mechanism 3 are set on the left and right end faces of the power collection mechanism 1 to improve the heat dissipation efficiency inside the power collection mechanism 1; wherein the power collection mechanism 1 includes a sealed shell 11, the sealed shell 11 includes two vents 111 arranged on the left and right sides, and the air leakage at the inlet of multiple rotor busbars 141 in the sealed shell 11 is reduced by the isolation assembly 411 and multiple isolation sleeves 412 of the water-gas separation structure 41, and the air leakage at the outlet of multiple busbars 51 is reduced by the sealing gasket 52 is reduced, so that a circulating air duct 12 is formed in the sealed shell 11, which can only take in air from the left vent 111 and exhaust air from the right vent 111, so that the stator structure 13 and the rotor structure 14 located in the circulating air duct 12 are subjected to uniform airflow, thereby improving the heat dissipation efficiency and heat dissipation uniformity, avoiding the burning of components at a local position caused by poor heat dissipation effect and the shutdown failure of the entire collector ring due to overheating; in addition, the isolation component and the isolation sheath can also prevent water droplets from penetrating into the collector mechanism along the cable when encountering water droplets, so that the insulation strength of the conductive components in the collector mechanism is better, avoiding the collector ring from facing the risk of short circuit.

[0023] Please continue reading Figure 2 , Figure 4 , Figure 5 , Figure 7The waterproof inlet mechanism 4 includes a rotor turntable 42, a rotor wiring enclosure 43 and a short flange tube 44; the rotor turntable 42 includes an inlet hole 421 and a cable sheath 422 arranged in the inlet hole 421; the cable of the wind turbine enters the waterproof inlet mechanism 4 through the cable sheath 422; the upper end of the short flange tube 44 is connected to the rotor turntable 42, and the lower end is connected to the rotor structure 14; the rotor wiring enclosure 43 is connected to the lower end surface of the rotor turntable 42.

[0024] Specifically, the cable of the wind turbine generator set enters the waterproof inlet mechanism 4 from the rotor turntable 42 from top to bottom, and is electrically connected to the upper end of the rotor busbar 141 inside the waterproof inlet mechanism 4. Therefore, the rotor turntable 42 includes an inlet hole 421 for the wind turbine generator set cable to pass through, and a cable sheath 422 is provided in the inlet hole 421 to prevent water droplets from penetrating into the waterproof inlet mechanism 4 along the outer wall of the cable. Under this arrangement, the waterproofness of the internal parts of the waterproof inlet mechanism 4 is increased, and water droplets can be prevented from further penetrating into the collector mechanism 1 from the waterproof inlet mechanism 4; the short flange cylinder 44 is arranged to be waterproof The line feed mechanism 4 provides space in the height direction and provides a connection between the rotor turntable 42 and the rotor structure 14, so that the short flange cylinder 44, the rotor turntable 42 and the rotor structure 14 can rotate synchronously; the setting of the rotor wiring enclosure 43 can not only increase the ventilation effect inside the waterproof line feed mechanism 4 through the ventilation grooves provided on its side wall, but also prevent water droplets from the side from infiltrating or splashing into the waterproof line feed mechanism 4. In addition, since the rotor wiring enclosure 43 is connected to the lower end surface of the rotor turntable 42, the rotor wiring enclosure 43 can achieve the aforementioned effect while realizing synchronous rotation with the rotor turntable 42.

[0025] Please continue reading Figure 4 , Fig.10 , Fig.11 , wherein the cable sheath 422 includes a turntable matching portion 4221, a turntable limiting portion 4222 and a cable matching portion 4223 which are arranged in sequence from bottom to top; the turntable matching portion 4221 includes a cable loose fitting hole 42211 arranged inside and a turntable sealing convex ring 42212 arranged on the outer wall; the turntable limiting portion 4222 matches with the upper end surface of the rotor turntable 42; the cable matching portion 4223 includes a cable tight fitting hole 42231 arranged inside; the outer wall of the turntable matching portion 4221 matches with the line inlet hole 421, and the inner wall of the cable tight fitting hole 42231 matches with the cable of the wind turbine set.

[0026] Specifically, in order to prevent water from seeping into the gap between the cable of the wind turbine and the wire inlet hole 421, a cable sheath 422 is provided; wherein the cable sheath 422 comprises a turntable matching portion 4221, a turntable limiting portion 4222 and a cable matching portion 4223, the outer wall of the turntable matching portion 4221 is tightly matched with the wire inlet hole 421, so that the entire cable sheath 422 is fixed to the wire inlet hole 421, and water can be prevented from seeping into the waterproof wire inlet mechanism 4 from the gap between the turntable matching portion 4221 and the wire inlet hole 421; the turntable limiting portion 4222 is set to have a diameter larger than the turntable matching part 4221. When the turntable limiting part 4222 is set on the upper end surface of the rotor turntable 42, it can prevent the entire cable sheath 422 from sinking; the cable matching part 4223 is set above the turntable limiting part 4222 and outside the wire entry hole 421, so that the installation of the entire cable sheath 422 is more convenient. If the cable matching part 4223 is set in the wire entry hole 421, it will be difficult to assemble if the fit is too tight, and it will be easy to seep water if the fit is too loose.

[0027] In addition, please refer to Fig.11 , wherein the cable tight-fitting hole 42231 arranged outside the wire entry hole 421 is tightly matched with the outer wall of the cable, while the cable loose-fitting hole 42211 arranged inside the wire entry hole 421 is larger than the cable, and a gap is left between the two. Under this arrangement, during assembly, the turntable matching part 4221 can be squeezed to deform first, and then installed into the wire entry hole 421, thereby making the installation more convenient; and when the rotor turntable 42 rotates, a relative torque will appear between the wire entry hole 421 of the rotor turntable 42 and the cable. If the wire entry hole 421, the turntable matching part 4221 and the cable are tightly matched, under the action of the torque, a momentary gap may appear between the three to allow water to penetrate, and under long-term action, the turntable matching part 4221 and the cable therein are prone to aging and wear, resulting in poor sealing performance.

[0028] Please read further Fig.11 It can be understood that the outer wall of the cable matching part 4223 is set to be an inclined surface. When water drops fall on the cable matching part 4223, it will flow along the inclined surface to the turntable limit part 4222, and then flow from the turntable limit part 4222 to the upper end surface of the power collecting mechanism 1, and be discharged along the outer wall of the power collecting mechanism 1. By guiding the water, water is prevented from penetrating into the waterproof line inlet mechanism 4.

[0029] It can be understood that in other embodiments, a step that cooperates with the turntable limit portion 4222 can also be provided in the wire entry hole 421, so that the turntable limit portion 4222 can also be embedded in the wire entry hole 421. Under this setting, the turntable limit portion 4222 not only plays the role of upper and lower limit, but its side surface can also closely cooperate with the side surface of the step, so as to play the role of waterproofing and reinforcing the entire cable sheath 422.

[0030] Please continue reading Figure 4 , Figure 7 , Figure 8 , wherein the isolation assembly 411 includes a raised ring 4111 arranged on the upper end surface of the collector mechanism 1, and an isolation disk 4112 arranged on the short flange cylinder 44; the isolation disk 4112 has a plurality of busbar holes 41121; the isolation sleeve 412 is arranged in the busbar holes 41121; the isolation disk 4112 includes a first annular groove 41122 arranged on the edge of the lower end surface, and the upper edge of the raised ring 4111 is inserted into the first annular groove 41122; the rotor wiring enclosure 43 includes a first folded edge 431 arranged at the lower end; the first folded edge 431 is arranged below the first annular groove 41122 and is located on the outside of the raised ring 4111.

[0031] It should be noted that in actual use, the sealed shell 11 and stator structure 13 of the power collection mechanism 1 are installed and fixed in the wind turbine, while the rotor structure 14 and the waterproof line inlet mechanism 4 are to rotate with the movement of the wind turbine cable. Therefore, the water-gas separation structure 41 needs to take into account three issues: water seepage into the power collection mechanism 1 due to the passage of the rotor busbar 141 in the waterproof line inlet mechanism 4, the sealing of the power collection mechanism 1 and the rotation of the waterproof line inlet mechanism 4.

[0032] Furthermore, the isolation assembly 411 includes a lifting ring 4111 and an isolation disk 4112, wherein the lifting ring 4111 is fixedly connected to the upper end surface of the collector mechanism 1 and is fixed with the collector mechanism 1, and the isolation disk 4112 is fixedly connected to the short flange cylinder 44 and rotates synchronously with the short flange cylinder 44 and the rotor turntable 42, thereby solving the problem of the waterproof line inlet mechanism 4 rotating with the movement of the wind turbine cable.

[0033] Furthermore, the isolation disk 4112 has a plurality of busbar holes 41121 ; the isolation sleeve 412 is disposed in the busbar hole 41121 , and when the rotor busbar 141 enters the collector mechanism 1 through the isolation sleeve 412 , water seepage in the gap therein can be prevented.

[0034] For further information, see Figure 8 , the isolation disk 4112 includes a first annular groove 41122, the upper edge of the lifting ring 4111 is inserted into the first annular groove 41122, and the rotor wiring enclosure 43 includes a first folded edge 431, which is arranged below the first annular groove 41122 and located on the outside of the lifting ring 4111. Under this arrangement, the rotation of the isolation disk 4112 is ensured because the isolation disk 4112 and the first folded edge 431 of the lifting ring 4111 do not contact each other. Since the airflow needs to pass through the tortuous and narrow gap between the three to enter the interior of the isolation component 411, the relative sealing between the interior of the isolation component 411 and the collector mechanism 1 is ensured; Fig.13It can be seen from the fluid simulation analysis that under the aforementioned structure, the amount of air leakage in the isolation assembly 411 is small, thereby ensuring that the interior of the current collection mechanism 1 has good sealing performance.

[0035] Please continue reading Fig.12 , wherein the isolation sleeve 412 includes an isolation disk limiting portion 4121 and an isolation disk matching portion 4122 arranged below the isolation disk limiting portion 4121; the isolation disk limiting portion 4121 is arranged on the upper end surface of the isolation disk 4112; the isolation disk matching portion 4122 matches with the busbar hole 41121; the isolation sleeve 412 has a busbar tight-fitting hole 4123; the busbar tight-fitting hole 4123 matches with the rotor busbar 141.

[0036] Specifically, the isolation disk limiting portion 4121 can be arranged on the upper end surface of the isolation disk 4112 to prevent the isolation sheath 412 from sinking into the busbar hole 41121. The outer wall of the isolation disk matching portion 4122 cooperates with the busbar hole 41121 to fix the entire isolation sheath 412 and fill the gap between the rotor busbar 141 and the busbar hole 41121 to prevent water droplets that cannot be blocked by the cable sheath 422 or water droplets that naturally condense inside the waterproof inlet mechanism 4 due to temperature changes from penetrating into the interior of the collector mechanism 1 along the gap between the rotor busbar 141 and the busbar hole 41121.

[0037] Please continue reading Fig. 9 , wherein the rotor wiring enclosure 43 includes a second folded edge 432 arranged at the upper end, and the rotor turntable 42 includes a second annular groove 423 arranged at the edge of the lower end surface; the second folded edge 432 is embedded in the second annular groove 423.

[0038] Specifically, since the rotor wiring enclosure 43 is connected to the lower end surface of the rotor turntable 42, the connection between the two is also prone to water droplets or water droplets falling on the rotor turntable 42 to penetrate. When the rotor wiring enclosure 43 is provided with a second folded edge 432 near the upper end of the rotor turntable 42, and the second folded edge 432 is embedded in the second annular groove 423, it can effectively prevent water seepage at the connection between the two.

[0039] It can be understood that the entire waterproof line-in mechanism 4 has three waterproof structures from top to bottom, namely, the cable sheath 422, the second folded edge 432 and the second annular groove 423, and the isolation sheath 412. Under the protection of these three waterproof structures from top to bottom, the waterproof line-in mechanism 4 and the power collecting mechanism 1 can be effectively prevented from infiltrating water, thereby preventing the parts inside the power collecting mechanism 1 from condensation due to water ingress, resulting in reduced insulation strength.

[0040] Please continue reading Figure 3 , Figure 6, wherein the sealed shell 11 further includes a frame 112 and two door panels 113 arranged on the front and rear end surfaces of the frame 112; the air inlet mechanism 2 and the air outlet mechanism 3 are respectively arranged on the left and right end surfaces of the frame 112; the frame 112 includes a plurality of frame angle panels 1121 and a first L-shaped folded edge 1122 arranged along the edge of the frame angle panel 1121, and the door panel 113 includes a door panel body 1131, a second L-shaped folded edge 1132 arranged along the peripheral wall of the door panel body 1131, and a sealing strip 1133 arranged along the peripheral wall of the door panel body 1131; the first L-shaped folded edge 1122 cooperates with the sealing strip 1133, and the second L-shaped folded edge 1132 cooperates with the frame angle panel 1121.

[0041] Specifically, in order to ensure the sealing of the front and rear end surfaces of the sealing shell 11, the frame 112 includes a frame angle plate 1121 and a first L-shaped folded edge 1122, and the door panel 113 includes a door panel body 1131, a second L-shaped folded edge 1132 and a sealing strip 1133. When the frame 112 and the door panel 113 are connected by fasteners, the first L-shaped folded edge 1122 cooperates with the sealing strip 1133, and the second L-shaped folded edge 1132 cooperates with the frame angle plate 1121. Under the clamping structure at these two places, the sealing of the front and rear end surfaces of the sealing shell 11 is better.

[0042] It can be understood that the top plate and the bottom plate of the sealed shell 11 can be configured to be integrally formed with the frame 112, or the top plate and the bottom plate can be configured to be connected to the frame 112 with a door panel 113 structure. When the top plate and the bottom plate are also configured to be a door panel 113 structure, the aforementioned structure can also be used to increase the sealing between the sealed shell 11 and the top plate and the bottom plate.

[0043] Understandably, please continue to refer to Figure 5 , Figure 6 The connection part between the edge of the air inlet mechanism 2, the air outlet mechanism 3 and the frame 112 can also be set to have the aforementioned sealing structure connected to the door panel 113 and the frame 112. Under this setting, the air flow in the circulating air duct 12 can be reduced from being disturbed by the leakage air flow at the connection part between the edge of the air inlet mechanism 2, the air outlet mechanism 3 and the frame 112.

[0044] Please continue reading Figure 2 , Figure 3 , wherein the door plate 113 on the front end surface of the frame 112 has a plurality of bus inlet holes 1134 ; the sealing gasket 52 is arranged in the bus inlet holes 1134 ; the bus 51 enters the collector mechanism 1 through the sealing gasket 52 .

[0045] It should be taken into consideration that since the door panel 113 on the front end face of the frame 112 needs to allow the bus 51 to pass through, there is a gap between the bus inlet hole 1134 on the door panel 113 and the bus 51. When the gap is filled with the sealing gasket 52, the sealing performance of the sealing shell 11 is better.

[0046] Please continue reading Figure 4 , Figure 5 , Figure 7 , wherein the rotor structure 14 includes a multi-layer slip ring assembly 142 arranged from top to bottom; the stator structure 13 includes a multi-layer arc row assembly 131 arranged from top to bottom, a carbon brush 132 is circumferentially arranged on each layer of the arc row assembly 131, and a transfer row 133 is provided on each layer of the arc row assembly 131; the carbon brush 132 is in contact with the slip ring assembly 142 so as to conduct the current on the slip ring assembly 142 to the arc row assembly 131.

[0047] It can be understood that, in this embodiment, the cables of the wind turbine generator set are divided into a No. 1 winding cable and a No. 2 winding cable, wherein the No. 1 winding cable is divided into three phases of U1, V1, and W1, and the corresponding rotor structure 14 includes three slip ring assemblies 142, and the corresponding stator structure 13 includes three sets of arc row assemblies 131, three sets of carbon brushes 132, and three sets of transfer rows 133, and the corresponding busbars 51 are also provided with three sets; The No. 2 winding cable is divided into three phases: U1, V1, and W1. The corresponding rotor structure 14 includes three slip ring assemblies 142. The corresponding stator structure 13 includes three sets of arc row assemblies 131, three sets of carbon brushes 132, and three sets of transfer rows 133. The corresponding bus 51 also has three groups.

[0048] Please continue reading Figure 2 , Figure 4 , Figure 5 , wherein the air inlet mechanism 2 includes an air inlet hole 21 and at least one filter plate 22 arranged at the air inlet hole 21; the air inlet hole 21 covers the multi-layer slip ring assembly 142, the multi-layer arc row assembly 131, the multi-layer carbon brush 132 and the multi-layer adapter row 133 arranged from top to bottom in the height direction; the air inlet hole 21 covers the arc row assembly 131 in the width direction; the air outlet mechanism 3 includes an air outlet hole 31 and a fan 32 arranged at the air outlet hole 31; the air outlet hole 31 covers the multi-layer slip ring assembly 142, the multi-layer arc row assembly 131, the multi-layer carbon brush 132 and the multi-layer adapter row 133 arranged from top to bottom in the height direction; the air outlet hole 31 covers the arc row assembly 131 in the width direction.

[0049] Specifically, due to the above arrangement, the front and rear end surfaces of the sealed housing 11 are sealed, the inlet of the rotor busbar 141 on the upper end surface is sealed by the water-gas separation structure 41, and the inlet of the busbar 51 on the front end surface is sealed by the sealing gasket 52, so that the circulating air duct 12 in the sealed housing 11 can only take in air from the left vent 111 and exhaust air from the right vent 111. Under this premise, the air inlet 21 and the air outlet 31 cover the entire rotor structure 14 and the stator structure 13 in the height direction, as shown in FIG. Fig.13 As shown in the fluid analysis, this arrangement, when the fan 32 is working, can make the air flow rate around the multi-layer slip ring assembly 142 of the rotor structure 14, the multi-layer arc row assembly 131 of the entire stator structure 13, the multi-layer carbon brush 132 and the multi-layer adapter row 133 relatively uniform, thereby avoiding the situation where the air flow rate around the local conductive components is slow and the position is prone to overheating; if sealing components such as the water-gas separation structure 41 are not provided, resulting in air leakage at some positions in the circulating air duct 12, the leaking air flow at this position will cause the air flow to impact the air flow from the left vent 111 to the right vent 111, resulting in chaotic air flow, low flow rate and uneven flow inside the circulating air duct 12, thereby reducing the heat dissipation efficiency and causing local insufficient heat dissipation.

[0050] The above description is only for the best embodiment of the present invention, but it should not be understood as limiting the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to be changed. All changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.

Claims

1. A yaw collector ring of a semi-direct drive wind turbine, characterized in that: It comprises a power collection mechanism (1), an air inlet mechanism (2) and an air outlet mechanism (3) respectively arranged on the left and right end surfaces of the power collection mechanism (1), a waterproof line inlet mechanism (4) arranged on the upper end surface of the power collection mechanism (1), and a line outlet mechanism (5) arranged on the front end surface of the power collection mechanism (1); The waterproof inlet mechanism (4) comprises a water vapor separation structure (41), the water vapor separation structure (41) comprising an isolation component (411) arranged on the upper end surface of the current collecting mechanism (1) and a plurality of isolation sheaths (412) arranged on the isolation component (411); the outlet mechanism (5) comprises a plurality of busbars (51) and sealing pads (52) arranged on the busbars (51); The power collection mechanism (1) comprises a sealed housing (11), a circulating air duct (12) arranged in the sealed housing (11), and a stator structure (13) and a rotor structure (14) arranged in the circulating air duct (12); the sealed housing (11) comprises two ventilation openings (111) arranged on the left and right sides; the air inlet mechanism (2) and the air outlet mechanism (3) are respectively arranged at the two ventilation openings (111); the rotor structure (14) comprises a plurality of rotor busbars (141); the plurality of rotor busbars (141) enter the sealed housing (11) through the isolation sleeve (412); the plurality of busbars (51) enter the sealed housing (11) through the sealing gasket (52); When the waterproof inlet mechanism (4) encounters water droplets, the water droplets are blocked by the isolation sheath (412); when the air outlet mechanism (3) is in operation, wind is sucked in from the air inlet mechanism (2), passes through the circulating air duct (12), and is then blown out from the air outlet mechanism (3).

2. The yaw collector ring of a semi-direct drive wind turbine according to claim 1 is characterized in that: The waterproof cable inlet mechanism (4) comprises a rotor turntable (42), a rotor wiring enclosure (43) and a short flange barrel (44); the rotor turntable (42) comprises a cable inlet hole (421) and a cable sheath (422) arranged in the cable inlet hole (421); the cable of the wind turbine generator set enters the waterproof cable inlet mechanism (4) through the cable sheath (422); the upper end of the short flange barrel (44) is connected to the rotor turntable (42), and the lower end is connected to the rotor structure (14); the rotor wiring enclosure (43) is connected to the lower end surface of the rotor turntable (42).

3. The yaw collector ring of a semi-direct drive wind turbine according to claim 2 is characterized in that: The cable sheath (422) comprises a turntable matching portion (4221), a turntable limiting portion (4222) and a cable matching portion (4223) which are arranged in sequence from bottom to top; the turntable matching portion (4221) comprises a cable loose-fitting hole (42211) arranged inside and a turntable sealing convex ring (42212) arranged on an outer wall; the turntable limiting portion (4222) matches with an upper end surface of the rotor turntable (42); the cable matching portion (4223) comprises a cable tight-fitting hole (42231) arranged inside; the outer wall of the turntable matching portion (4221) matches with the cable inlet hole (421), and the inner wall of the cable tight-fitting hole (42231) matches with a cable of the wind turbine generator set.

4. The yaw collector ring of a semi-direct drive wind turbine according to claim 2 is characterized in that: The isolation assembly (411) comprises a raised ring (4111) arranged on the upper end surface of the current collecting mechanism (1), and an isolation disk (4112) arranged on the short flange cylinder (44); the isolation disk (4112) has a plurality of busbar holes (41121); the isolation sleeve (412) is arranged in the busbar holes (41121); The isolation disk (4112) includes a first annular groove (41122) arranged at the edge of the lower end surface, and the upper edge of the lifting ring (4111) is inserted into the first annular groove (41122); the rotor wiring enclosure (43) includes a first folded edge (431) arranged at the lower end; the first folded edge (431) is arranged below the first annular groove (41122) and is located on the outside of the lifting ring (4111).

5. The yaw collector ring of a semi-direct drive wind turbine according to claim 4 is characterized in that: The isolation sleeve (412) comprises an isolation disk limiting portion (4121) and an isolation disk matching portion (4122) arranged below the isolation disk limiting portion (4121); the isolation disk limiting portion (4121) is arranged on the upper end surface of the isolation disk (4112); the isolation disk matching portion (4122) matches with the busbar hole (41121); the isolation sleeve (412) has a busbar tight-fitting hole (4123); the busbar tight-fitting hole (4123) matches with the rotor busbar (141).

6. The yaw collector ring of a semi-direct drive wind turbine according to claim 2, characterized in that: The rotor connection enclosure (43) comprises a second folded edge (432) arranged at the upper end, and the rotor turntable (42) comprises a second annular groove (423) arranged at the edge of the lower end surface; the second folded edge (432) is embedded in the second annular groove (423).

7. The yaw collector ring of a semi-direct drive wind turbine according to claim 1, characterized in that: The sealed shell (11) further comprises a frame (112) and two door panels (113) arranged on the front and rear end surfaces of the frame (112); the air inlet mechanism (2) and the air outlet mechanism (3) are respectively arranged on the left and right end surfaces of the frame (112); the frame (112) comprises a plurality of frame angle plates (1121) and a first L-shaped folded edge (1122) arranged along the edge of the frame angle plate (1121); the door panel (113) comprises a door panel body (1131), a second L-shaped folded edge (1132) arranged along the peripheral wall of the door panel body (1131) and a sealing strip (1133) arranged along the peripheral wall of the door panel body (1131); the first L-shaped folded edge (1122) cooperates with the sealing strip (1133), and the second L-shaped folded edge (1132) cooperates with the frame angle plate (1121).

8. The yaw collector ring of a semi-direct drive wind turbine according to claim 7 is characterized in that: The door plate (113) on the front end surface of the frame (112) has a plurality of busbar inlet holes (1134); the sealing gasket (52) is arranged in the busbar inlet holes (1134); and the busbar (51) enters the current collecting mechanism (1) through the sealing gasket (52).

9. The yaw collector ring of a semi-direct drive wind turbine according to any one of claims 1 to 8, characterized in that: The rotor structure (14) comprises a plurality of layers of slip ring assemblies (142) arranged from top to bottom; the stator structure (13) comprises a plurality of layers of arc-shaped row assemblies (131) arranged from top to bottom, carbon brushes (132) being arranged circumferentially on each layer of the arc-shaped row assemblies (131), and a transfer row (133) being provided on each layer of the arc-shaped row assemblies (131); the carbon brushes (132) are in contact with the slip ring assemblies (142) so as to conduct current on the slip ring assemblies (142) to the arc-shaped row assemblies (131).

10. The yaw collector ring of a semi-direct drive wind turbine according to claim 9, characterized in that: The air inlet mechanism (2) comprises an air inlet hole (21), and at least one filter plate (22) arranged at the air inlet hole (21); the air inlet hole (21) covers a multi-layer slip ring assembly (142), a multi-layer arc-shaped row assembly (131), a multi-layer carbon brush (132), and a multi-layer adapter row (133) arranged from top to bottom in a height direction; and the air inlet hole (21) covers the arc-shaped row assembly (131) in a width direction; The air outlet mechanism (3) comprises an air outlet hole (31) and a fan (32) arranged at the air outlet hole (31); the air outlet hole (31) covers a multi-layer slip ring assembly (142), a multi-layer arc row assembly (131), a multi-layer carbon brush (132) and a multi-layer adapter row (133) arranged from top to bottom in a height direction; and the air outlet hole (31) covers the arc row assembly (131) in a width direction.

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