Integrated semi-direct-drive wind driven generator stator
Through the design of the integrated semi-direct drive wind turbine stator, the problem of poor adaptability of the wind turbine stator and gearbox is solved, modular manufacturing and efficient maintenance are achieved, and production efficiency and heat dissipation performance are improved.
Patent Information
- Application Number
- CN202422079526.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-08-27
AI Technical Summary
The existing wind turbine stator structure is difficult to adapt to different models of gearboxes, resulting in difficulties in generator cost reduction optimization and modular applications.
The integrated semi-direct drive wind turbine stator is designed, including the base, core structure and a variety of interface designs. It supports the connection of different air coolers and water coolers. It has modular functions to facilitate batch manufacturing and maintenance, and automatically discharge of condensate through conductive ring support structure and check valve.
It improves the adaptability and production efficiency of the generator, reduces the cost of stator punching and mold opening, simplifies the maintenance process, ensures timely discharge of condensate water, and enhances the heat dissipation effect and structural stability.
Smart Images
Figure CN223141682U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of wind power generation, and particularly relates to an integrated semi-direct drive wind turbine generator stator. Background Art
[0002] Wind energy, as an environmentally friendly and renewable clean energy, is widely used. In recent years, wind turbines have developed rapidly, towards larger power ratings and more compact structures. Facing increasingly fierce market competition and cost pressure, the integration of generators and gearboxes has become a trend. In order to make the generator better adapt to different models of gearboxes, it is necessary to continuously optimize the cost reduction of the engine and design and optimize the structure of the engine to meet market demands. Therefore, there is an urgent need to optimize the structure of existing generators, design an integrated semi-direct drive wind turbine generator stator, make it have modular functions, facilitate batch application manufacturing, maintenance, and component replacement, so as to adapt to 10 - 20 MW wind turbines.
[0003] In view of this, the present utility model is specifically proposed. Content of the Utility Model
[0004] The purpose of the present utility model is to overcome the above-mentioned drawbacks of the prior art and provide an integrated semi-direct drive wind turbine generator stator.
[0005] To achieve the above purpose, the present utility model provides the following technical solutions:
[0006] An integrated semi-direct drive wind turbine generator stator, comprising a machine base and an iron core structure fixedly arranged inside the machine base;
[0007] An air inlet and an air outlet adapted to different air coolers, as well as a water inlet and a water outlet of a water cooler, are arranged at the top of the machine base. A main power connection box for accessing high-voltage electricity and an auxiliary power connection box for accessing low-voltage electricity are arranged on the side wall. A condensate drain pipe for automatically discharging condensate water and multiple drain pipes for passively discharging the circulating water in the water cooler are arranged at the bottom. A first stop is arranged at the non-wiring end of the machine base for cooperating with the gearbox, and a second stop is arranged at the wiring end for cooperating with the rear end cover. The air inlet can be designed as an air inlet at the drive end or the non-drive end, that is, the air path circulation can be designed as clockwise or counterclockwise according to user requirements;
[0008] Due to the 6° inclination of the generator, condensate water will be generated at the non-wiring end due to the start-up and shutdown cycles. Therefore, a condensate drain pipe is designed at the 12 o'clock position of the machine base. A check valve is designed at the outlet of the condensate drain pipe. When the condensate water accumulates to a certain volume, the check valve is opened under the action of gravity, and the condensate water is automatically discharged. The volume of the accumulated condensate water is realized by selecting a spring with a suitable Hooke's coefficient to automatically open the check valve, ensuring that the liquid level of the condensate water is discharged in time when it is below the stator coil.
[0009] Specifically, the iron core structure includes an iron core that is in interference fit with the machine base. The iron core includes stator laminations stacked layer by layer from the non-wiring end to the wiring end. After stacking, a plurality of stator tie plates for enhancing the integrity of the iron core structure are evenly welded on the outer circumference of the iron core. Tooth pressure plates for fixing the stator laminations are provided at both ends of the iron core. A non-wiring end plate is provided on the tooth pressure plate near the non-wiring end, and a wiring end plate is provided on the tooth pressure plate near the wiring end; a conducting ring is also provided at the wiring end of the iron core. The phase rings of each set of windings are arranged axially, and a wiring terminal is welded to each phase ring for the purpose of connecting with the lead copper bar to output the electric energy generated by the generator. The conducting ring is supported by a conducting ring support rod and a spacer block, and is tied together by a polyester rope. After the conducting ring is assembled, it is cured by impregnating varnish.
[0010] The conducting ring has a cantilever fixed structure on the wiring end plate. During the operation of the generator, vibrations will occur. Therefore, an insulating conducting ring support plate is designed on the inner wall of the machine base. The conducting ring support plate is supported on the inner wall of the machine base by stud bolts. Both ends of the stud bolts adopt a double-nut structure to achieve anti-loosening. This design structure is evenly distributed at several circumferential positions on the inner wall of the machine base to prevent excessive vibration of the conducting ring and prevent damage to the insulating structure of the conducting ring.
[0011] Specifically, one side of the machine base near the non-wiring end plate is welded and fixed to the non-wiring end plate. A plurality of first threaded holes are provided on the side of the wiring end plate away from the iron core. A plurality of second threaded holes corresponding to the first threaded holes are provided on the side of the machine base near the wiring end plate. The machine base and the wiring end plate are bolted and fixed by a plurality of connecting plates. The plurality of connecting plates are evenly distributed in the circumferential direction of the machine base. Through holes adapted to the first threaded holes and the second threaded holes are provided on the connecting plates.
[0012] Specifically, air guide plates for guiding cold air to the air gap of the generator are provided on the inner sides of the air inlet and the air outlet near the iron core, which structurally strengthens the structural strength of the air inlet and the air outlet.
[0013] Specifically, standardized SAE flanges for facilitating detachable connection with the water cooler are provided at both the water inlet and the water outlet. A standard sealing groove and a sealing ring are provided on the connection surface of each flange. The water inlet and the water outlet are arranged on the same side or on different sides; the cooling circulation piping in the generator compartment can be adjusted as required.
[0014] Specifically, a plurality of drain pipes for discharging the circulating water in the water cooler are provided at the bottom of the machine base. A drain pipe plug is provided at the outlet of each drain pipe. The drain pipes are fixed to the machine base by fixing bolts to fix the foamed rubber strip and the guard plate to restrain them, preventing excessive vibration of the drain pipes during operation.
[0015] Specifically, a base observation hole for facilitating the observation of the operating state at the connection between the generator and the gearbox is also provided on the side arm of the base, and a transparent observation hole cover plate is provided on the base observation hole.
[0016] Specifically, lifting lugs for facilitating lifting are provided on both the connection end flange and the non-connection end flange of the base.
[0017] Specifically, the main power connection box includes a main wiring box frame fixed at one end to the side of the base, and a main wiring box cover plate detachably connected at the other end. The top of the main wiring box frame is an outlet board, and a plurality of through holes for facilitating the upward outlet of the phase cable are provided on the outlet board. A first gland for sealing and fastening the upward outlet of the phase cable is provided in the through hole;
[0018] The cable of the generator exits from both sides of the base, and the exiting method is related to the cable routing of the user in the engine room; usually, the power transmission cables in the generator room are routed on the top of the engine room. Therefore, it is necessary for the generator to exit upward. Openings are designed at the 12 o'clock and 6 o'clock positions of the base, and a frame-type main power connection box is welded on the side wall of the base. The frame of the main power connection box is welded with angle steel, and a wiring box cover plate is provided on each side. The wiring box cover plate is bolted to the wiring box frame, and each wiring box cover plate can be opened. On the one hand, it is convenient for the user to connect the cable with the lead copper row, meeting the operating space for long bolts. On the other hand, the detachable wiring box cover plate makes the daily maintenance operation more convenient.
[0019] The electric energy generated by the generator is led out through the terminal of the slip ring, and then connected to the main wiring box through the lead copper row. The user's cable is led out from above the main wiring box. A first gland adapted to the cable is designed on the outlet board of the main wiring box for fastening the cable and playing a role in sealing and waterproofing; among them, the terminal is integrally welded with the slip ring, and the lead copper row and the terminal are designed with a suitable overlapping area according to the current density and are connected into one body through standard-sized connecting bolts; during the operation of the motor, there is often a certain degree of vibration. To better fasten the terminal, an insulating copper row clamping plate is designed on the side wall of the generator base for fixation, and a silicone rubber self-adhesive tape is wound at the fixed position of the lead copper row to fill the gap of the slot of the copper row clamping plate.
[0020] Specifically, the auxiliary junction box of the generator is designed on the side wall of the machine base, close to the main junction box. The weak current system usually integrates the wiring of various sensors of the generator, such as the power supply line of the fan of the air-water cooler, the heating tape line of the air-cooler fan, and other alarm signal lines. Through layout and wiring, they are uniformly summarized and enter the interior of the auxiliary junction box, which is convenient for users to wire. Inside the connection between the auxiliary junction box and the machine base, an opening is designed on the side of the machine base to lead out the sensor line of the inner winding of the motor. The interior of the auxiliary junction box is equipped with standard terminal blocks. According to the thickness of the wire type, the appropriate terminal models ZDU and ZDK are selected; the motor side has an upper incoming line, and the user side has a lower outgoing line. All signal lines are connected in the form of bellows + second gland (or quick hose joint), which are all standard parts, easy to replace and maintain. And a leech nail for wiring is designed under the auxiliary junction box to facilitate wiring.
[0021] Specifically, insulating plates are provided between the main junction box, the auxiliary junction box and the machine base to facilitate the machine base to form a closed space, prevent air leakage from affecting heat dissipation, and prevent foreign objects from falling into the generator.
[0022] Compared with the prior art, the technical solution provided by the present utility model has the following beneficial effects:
[0023] In the integrated semi-direct drive wind turbine generator stator of the present utility model, by setting the opening of the air-cooler as a general interface, the width of the air inlet and outlet of the air-cooler is finely designed, and the angle of the air deflector can also be adjusted, which is more suitable for the flow direction of the cold air. Therefore, the selection and design of the air-cooler are more convenient; by designing the water inlet pipe and the water outlet pipe to be on the same side or on different sides for inlet and outlet, the adaptability to the layout of the cooling pipelines inside the nacelle is stronger and the layout is more reasonable; by setting the outlet board at the top of the main junction box, it is adapted to the layout form of the cable line being pushed out from the top in the nacelle, or the outlet board of the cable line can also be designed at the bottom of the junction box to realize the wiring form of the cable line going out from the bottom.
[0024] Furthermore, the cable outlet on the machine base can also be adjusted according to the actual situation. In the present utility model, the cable outlets are located at the 3 o'clock and 9 o'clock positions of the machine base. The cable outlets of the machine base can also be designed to be opened at the 5 o'clock and 7 o'clock positions. Only need to rotate the welding position of the terminal of the slip ring to the 5 o'clock and 7 o'clock positions, and then weld the junction box frame at the 5 o'clock and 7 o'clock positions, and the cable line can realize the outlet from the lowest point of the generator;
[0025] Furthermore, the auxiliary junction box is located at the 3 o'clock position of the machine base. Similarly, according to the wiring of the weak current inside the nacelle, the interface position of the auxiliary junction box on the machine base can be adjusted. The opening of the auxiliary junction box on the machine base can be rotated along the outer wall of the machine base to adapt to the outlet position of the user;
[0026] Furthermore, through the modular design of the iron core components, the connection end plates, non-connection end plates, tooth pressure plates, and stator punching sheets can be made universal in generators of different power ratings, resulting in higher production efficiency during mass manufacturing. At the same time, the high cost of die opening for stator punching sheets is reduced. The difference between generators of different power ratings is that the iron core length is laminated to different lengths to meet their power ratings.
[0027] Furthermore, an observation hole cover plate is designed on the machine base to observe the operating status of the connection position between the motor and the gearbox, facilitating daily maintenance and repair; conductive ring support rods are evenly distributed on the outer side of the slip ring to effectively fix the slip ring and avoid vibration during operation; a check valve is designed at the bottom of the machine base to automatically discharge condensate; 6 drain pipes are designed at the bottom of the machine base, and a plug structure is designed at the end of each drain pipe, and they are constrained by foam rubber strips and the guard plate to prevent the drain pipes from vibrating. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The accompanying drawings here are incorporated into the specification and form a part of this specification, and are used together with the specification to explain the principles of the present utility model.
[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0030] Figure 1 is the three-dimensional structure schematic diagram of the present utility model;
[0031] Figure 2 is the schematic diagram of the air duct on the rotor side of the present utility model;
[0032] Figure 3 is the schematic diagram of the distribution of the water inlet and the water outlet on different sides of the present utility model;
[0033] Figure 4 is the schematic diagram of the distribution of the water inlet and the water outlet on the same side of the present utility model;
[0034] Figure 5 is the installation schematic diagram of the air guide plate of the present utility model;
[0035] Figure 6 is the distribution schematic diagram of the main terminal box on the machine base of the present utility model;
[0036] Figure 7 is Figure 6 the partial enlarged schematic view in the A direction in
[0037] Figure 8 is the structure schematic diagram of the main terminal box of the present utility model;
[0038] Figure 9 is Figure 8 a sectional view taken along the B-B direction in
[0039] Figure 10 is Figure 8 a sectional view taken along the C-C direction in
[0040] Figure 11 a schematic diagram of the auxiliary junction box of the present utility model;
[0041] Figure 12 is Figure 11 a sectional view taken along the D-D direction in
[0042] Figure 13 the front view of the generator stator of the present utility model;
[0043] Figure 14 is Figure 13 a sectional view taken along the M-M direction in
[0044] Figure 15 is Figure 13 a sectional view taken along the N-N direction in
[0045] Figure 16 a three-dimensional schematic diagram of the iron core structure of the present utility model;
[0046] Figure 17 a sectional view of the iron core structure of the present utility model;
[0047] Figure 18 a schematic diagram of the assembly of the frame and the iron core structure of the present utility model;
[0048] Figure 19 is Figure 18 a partially enlarged schematic diagram taken along the E direction in
[0049] Figure 20 a schematic diagram of the distribution of the lifting lugs on the frame of the present utility model;
[0050] Figure 21 is Figure 20 a sectional view taken along the F-F direction in
[0051] Figure 22 a schematic diagram of the distribution of the insulating plate and the observation hole cover plate of the present utility model;
[0052] Figure 23 a schematic diagram of the distribution of the condensed water and the drain pipe inside the frame of the present utility model;
[0053] Figure 24 is Figure 23 a partially enlarged schematic diagram taken along the I direction in
[0054] Figure 25as Figure 23 A sectional view taken along the G-G direction in the figure.
[0055] Wherein: 1 is the machine base; 2 is the air inlet; 3 is the air outlet; 4 is the water inlet; 5 is the water outlet; 6 is the main junction box; 61 is the cover plate of the main junction box; 62 is the wire outlet plate; 63 is the first gland; 64 is the long bolt; 65 is the copper busbar clamp; 66 is the silicone rubber self-adhesive tape; 67 is the lead copper busbar; 68 is the insulating plate; 96 is the terminal; 7 is the lifting lug; 8 is the observation hole cover plate; 9 is the leech nail; 10 is the drain pipe; 101 is the drain pipe plug; 102 is the fixing bolt; 103 is the foaming rubber strip; 104 is the protection plate; 11 is the air cooler; 12 is the air guide plate; 13 is the auxiliary junction box; 131 is the second gland; 132 is the opening on the side of the machine base; 14 is the upward outlet of the phase cable; 15 is the downward outlet of the grounding cable; 16 is the iron core structure; 160 is the iron core; 161 is the lead terminal; 162 is the slip ring; 163 is the connecting bolt; 164 is the stator pull plate; 165 is the slip ring support rod; 166 is the spacer; 167 is the tooth pressure plate; 168 is the connection end plate; 169 is the non-connection end plate; 17 is the gear box; 170 is the connecting plate; 171 is the polyester rope; 172 is the slip ring support plate; 173 is the stud; 174 is the double nut; 175 is the condensate; 18 is the rear end cover; 19 is the condensate drain pipe; 191 is the check valve; 192 is the spring. Detailed implementation manners
[0056] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present invention. On the contrary, they are only examples consistent with some aspects of the present invention detailed in the appended claims.
[0057] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the drawings and embodiments.
[0058] Embodiment
[0059] This embodiment provides an integrated semi-direct-drive wind turbine stator, including a machine base 1 and an iron core structure 16 fixedly arranged in the machine base 1;
[0060] At the top of the machine base 1, there are an air inlet 2 and an air outlet 3 adapted to different air coolers 11, as well as a water inlet 4 and a water outlet 5 for the water cooler. On the side wall, there is a main power connection box 6 for accessing strong electricity and an auxiliary power connection box 13 for accessing weak electricity. At the bottom, there is a condensate drain pipe 19 for automatically discharging condensate 175, and multiple drain pipes 10 for passively discharging the circulating water in the water cooler. At the non-wiring end of the machine base 1, there is a first stop for mating with the gearbox 17, and at the wiring end, there is a second stop for mating with the rear end cover 18. See Figure 1 , 13 -15. The air inlet 2 can be designed for inlet air at the drive end or non-drive end, that is, the air path circulation can be designed in a clockwise or counterclockwise form according to the user's requirements. See Figure 2 .
[0061] Due to the 6° inclination of the generator, condensate 175 will be generated at the non-wiring end due to the cycle of starting and stopping the machine. Therefore, a condensate drain pipe 19 is designed at the 6 o'clock position of the machine base 1. A check valve 191 is designed at the outlet of the condensate drain pipe 19. When the condensate 175 accumulates to a certain volume, the check valve 191 is opened under the action of gravity, and the condensate 175 is automatically discharged. The volume of the accumulated condensate 175 is adjusted by selecting a spring 192 with an appropriate Hooke's coefficient to automatically open the check valve 191, ensuring that the condensate 175 is discharged in time when the liquid level is below the stator coil. See Figure 23 , 24 .
[0062] Specifically, the iron core structure 16 includes an iron core 160 that is interference-fitted with the machine base 1. The iron core 160 includes stator laminations stacked layer by layer from the non-wiring end to the wiring end. After stacking, a plurality of stator tie plates 164 for enhancing the integrity of the iron core structure are evenly welded on the outer circumference of the iron core 160. At both ends of the iron core 160, there are tooth pressure plates 167 for fixing the stator laminations. A non-wiring end plate 169 is provided on the tooth pressure plate 167 near the non-wiring end, and a wiring end plate 168 is provided on the tooth pressure plate 167 near the wiring end. A slip ring 162 is also provided at the wiring end of the iron core 160. The phase rings of each set of windings are arranged axially, and each phase ring is welded with a wiring terminal 69 for the purpose of connecting with the lead copper bar 67 to output the electric energy generated by the generator. The slip ring 162 is supported by a slip ring support rod 165 and a spacer 166, and is tied together by a polyester rope 171. After the slip ring 162 is assembled, it is cured by dipping in paint. See Figure 16 , 17 .
[0063] The conductive ring 162 is of a cantilever fixed structure on the connection end plate 168. During the operation of the generator, vibrations will occur. Therefore, an insulating conductive ring support plate 172 is designed on the inner wall of the machine base 1. The conductive ring support plate 172 is supported on the inner wall of the machine base 1 by stud bolts 173. Both ends of the stud bolts 173 are provided with double nuts 174 to prevent loosening. This structure is evenly distributed at several locations in the circumferential direction of the inner wall of the machine base 1 to prevent excessive vibration of the conductive ring 162 and damage the insulation structure of the conductive ring 162. See Figure 21 as shown.
[0064] Specifically, one side of the machine base 1 close to the non-connection end plate 169 is welded and fixed to the non-connection end plate 169. A plurality of first threaded holes are provided on the side of the connection end plate 168 away from the iron core 160. A plurality of second threaded holes corresponding to the first threaded holes are provided on the side of the machine base 1 close to the connection end plate 168. The machine base 1 and the connection end plate 168 are screwed and fixed through a plurality of connecting plates 170. The plurality of connecting plates 170 are evenly distributed in the circumferential direction of the machine base 1. The connecting plates 170 are provided with through holes adapted to the first threaded holes and the second threaded holes; see Figure 18 and 19 as shown.
[0065] Specifically, air guide plates 12 for guiding cold air into the air gap of the generator are provided on the inner sides of the air inlet 2 and the air outlet 3 close to the iron core 160, strengthening the structural strength of the air inlet 2 and the air outlet 3 in terms of structure. See Figure 5 as shown.
[0066] Specifically, the water inlet 4 and the water outlet 5 are both provided with standardized SAE flanges facilitating detachable connection with the water cooler. The connection surface of each flange is provided with standard sealing grooves and sealing rings. The water inlet 4 and the water outlet 5 are arranged on the same side or different sides. See Figure 3 and 4 as shown; the cooling circulation piping in the generator compartment can be adjusted as required.
[0067] Specifically, a plurality of drain pipes 10 for discharging the circulating water in the water cooler are arranged at the bottom of the machine base 1. A drain pipe plug 101 is provided at the outlet of each drain pipe 10. The drain pipes 10 are fixed to the machine base 1 through fixing bolts 102 to fix the foamed rubber strips 103 and the guard plates 104 to restrict them, preventing excessive vibration of the drain pipes 10 during operation; see Figure 23 and 25 as shown.
[0068] Specifically, a machine base observation hole for facilitating observation of the operating state at the connection 17 between the generator and the gearbox is further provided on the side arm of the machine base 1. A transparent observation hole cover plate 8 is provided on the machine base observation hole; see Figure 22 as shown.
[0069] Specifically, lifting lugs 7 for easy hoisting are provided on both the connection end flange and the non-connection end flange of the machine base 1. Refer to Figure 20 as shown.
[0070] Specifically, the main power connection box 6 includes a main wiring box frame fixed at one end to the side of the machine base 1, and a main wiring box cover plate 61 detachably connected at the other end. The top of the main wiring box frame is an outlet board 62, and a plurality of through holes for facilitating the upward outlet 14 of the phase cable are provided on the outlet board 62. A through hole for the downward outlet 15 of the grounding cable is provided at the bottom of the main power connection box 6. Each through hole is provided with a first gland 63 for sealing and fastening the cable.
[0071] The cable of the generator is led out through both sides of the machine base 1, and the outlet method is related to the cable routing of the user in the engine room; usually, the power transmission cables in the generator room are routed at the top of the engine room. Therefore, it is necessary for the generator to lead out upward. Openings are designed at the 3 o'clock and 9 o'clock positions of the machine base 1, and a frame-type main power connection box 6 is welded on the side wall of the machine base 1. The frame of the main power connection box 6 is welded with angle steel, and a wiring box cover plate 61 is provided on each side. The wiring box cover plate 61 is connected to the wiring box frame by bolts, and each wiring box cover plate 61 can be opened. On the one hand, it is convenient for the user to connect the cable to the lead copper bar 67 and meet the operating space of the long bolt 64. On the other hand, the detachable wiring box cover plate 61 makes the daily maintenance operation more convenient. Refer to Figure 6 、 7 、8, and 9 as shown.
[0072] The electric energy generated by the generator is led out through the terminal 69 of the slip ring 162, and then connected to the main wiring box 6 through the lead copper bar 67. The user's cable is led out from above the main wiring box. A first gland 63 suitable for the cable is designed on the outlet board 62 of the main wiring box 6 to fasten the cable and play a role in sealing and waterproofing. Among them, the terminal 69 and the slip ring 162 are integrally formed by welding, and the overlapping area of the lead copper bar 67 and the terminal 69 is designed according to the current density and connected into one body by standard specification connection bolts 163. During the operation of the motor, there is often a certain degree of vibration. To better fasten the terminal 69, an insulating copper bar clamp 65 is designed on the side wall of the machine base 1 of the generator for fixation, and a silicone rubber self-adhesive tape 66 is wound around the fixed position of the lead copper bar 67 to fill the gap of the notch of the copper bar clamp 65. Refer to Figure 9 、 10 as shown.
[0073] Specifically, the auxiliary junction box 13 of the generator is designed on the side wall of the machine base 1, near the main junction box 6. The weak current system usually aggregates the wiring of various sensors of the generator, such as the power supply line of the fan of the air-water cooler, the heating tape line of the air-cooler fan, and other alarm signal lines. Through layout and wiring, they are uniformly summarized and enter the interior of the auxiliary junction box 13, facilitating the user to wire. Inside the connection between the auxiliary junction box 13 and the machine base 1, a hole 132 is designed on the side of the machine base to lead out the sensor line of the inner winding of the motor. The interior of the auxiliary junction box 13 is a standard terminal block. Select the appropriate terminal models ZDU and ZDK according to the thickness of the wire type; the motor side has an upper incoming line, and the user side has a lower outgoing line. All signal lines are connected in the form of bellows and the second gland 131 (or quick hose connector), which are all standard parts and are easy to replace and maintain. And a leech nail 9 for wiring is designed below the auxiliary junction box 13 to facilitate wiring. See Figure 11 、 12 shown.
[0074] Specifically, insulating plates 68 are provided between the main junction box 6, the auxiliary junction box 13 and the machine base 1 to facilitate the machine base 1 to form a closed space, preventing air leakage from affecting heat dissipation and preventing foreign objects from falling into the generator. See Figure 22 shown.
[0075] This embodiment also provides an assembly method for the stator of an integrated semi-direct drive wind turbine generator, which is as follows:
[0076] The first step: Assembly of the iron core
[0077] The iron core 160 is stacked from the non-connected end to the connected end. The primary stacking sequence is: non-connected end plate 169, tooth pressure plate 167, stator punching sheet, tooth pressure plate 167, connected end plate 168. After stacking, the stator stay plate 164 is welded around the outer circle of the iron core 160 to make the iron core 160 a whole. The coil is assembled inside the inner circle of the iron core 160. The conductive ring support rod 165 and the conductive ring 162 are installed on the connected end plate 168 to complete the connection of the entire winding part.
[0078] The second step: Stator assembly
[0079] The machine base 1 is heated to a certain temperature and kept warm to make the whole machine base 1 expand uniformly. After the temperature is constant, the machine base 1 is taken out of the oven, and then the iron core 160 is thermally sleeved so that the connected end plate 168 fits with the second stop of the machine base 1. After the stator cools down to a constant temperature, uniformly distributed connecting plates 170 are installed on the connected end plate 168, and the non-connected end plate 169 of the iron core 160 is welded to the machine base 1 at the non-connected end.
[0080] The third step: Machine base assembly
[0081] Design an interface for the air cooler 11 at the top of the machine base 1. Connect the machine base 1 and the air cooler 11 together using standard specification bolts. On the side wall of the machine base 1, there are a strong power system and a weak power system. The strong power system is arranged in the main junction box 6. First, install the lead copper busbar 67 and fix it on the side wall of the machine base 1 with the copper busbar clamp 65. At the same time, install the insulating board 68 at the opening position of the machine base 1 to make the machine base 1 a closed space. Then, wind the silicone rubber self-adhesive tape 66 at the fixed gap position of the lead copper busbar 67 for sealing. The auxiliary junction box 13 is arranged on the side wall of the machine base 1, and there is an opening 132 on the side wall of the machine base 1. Route the signal lines such as the cooling fan power line, motor heating tape line, and winding temperature sensor line of the air cooler 11 in a unified manner and gather them in the auxiliary junction box 13 to achieve weak power integration and facilitate the user to wire.
[0082] Step 4: Assembly of General Accessories
[0083] Install the observation hole cover plate 8 on the non-wiring end side of the machine base 1. The observation hole cover plate 8 is connected to the machine base 1 using standard bolts. Install the slip ring support plate 172 on the wiring end side and fix it on the inner wall of the machine base 1 with the stud 173. The two ends of the stud 173 are locked by the form of double nuts 174. Arrange the condensate drain pipe 19 at the bottom of the machine base 1. The condensate drain pipe 19 uses a standard check valve 191 to automatically drain the condensate 175. Design 6 drain pipes 10 at the bottom of the machine base 1. Design a drain pipe plug 101 at the end of each drain pipe 10, and restrain it with the foam rubber strip 103 and the guard plate 104.
[0084] The above are only the specific implementation manners of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.
[0085] It should be understood that the present invention is not limited to the content already described above and can be modified and changed without departing from its scope. The scope of the present invention is only limited by the appended claims.
Claims
1. An integrated semi-direct drive wind turbine stator, characterized in that, It includes a frame (1), and a core structure (16) fixedly arranged inside the frame (1); On the top of the frame (1), there are an air inlet (2) and an air outlet (3) adapted to different air coolers (11), as well as a water inlet (4) and a water outlet (5) of a water cooler. On the side wall, there is a main power connection box (6) for accessing high - voltage electricity and an auxiliary power connection box (13) for accessing low - voltage electricity. At the bottom, there is a condensate drain pipe (19) for automatically discharging condensate water (175), and multiple drain pipes (10) for passively discharging the circulating water in the water cooler.
2. The integrated semi-direct-drive wind turbine stator according to claim 1, wherein The core structure (16) includes a core (160) in interference fit with the frame (1). The core (160) includes stator laminations stacked layer by layer from the non - connection end to the connection end. At both ends of the core (160), there are tooth pressure plates (167) for fixing the stator laminations. On the tooth pressure plate (167) near the non - connection end, there is a non - connection end plate (169), and on the tooth pressure plate (167) near the connection end, there is a connection end plate (168).
3. The integrated semi-direct drive wind turbine stator according to claim 2, wherein One side of the frame (1) close to the non - connection end plate (169) is welded and fixed to the non - connection end plate (169). On the side of the connection end plate (168) away from the core (160), there are multiple first threaded holes. On the side of the frame (1) close to the connection end plate (168), there are multiple second threaded holes corresponding to the first threaded holes. The frame (1) and the connection end plate (168) are screwed and fixed through multiple connecting plates (170). The multiple connecting plates (170) are evenly distributed in the circumferential direction of the frame (1). The connecting plates (170) are provided with through holes adapted to the first threaded holes and the second threaded holes.
4. The integrated semi-direct drive wind turbine stator according to claim 1, characterized in that, Inside the air inlet (2) and the air outlet (3) close to the core (160), there are air guide plates (12) facilitating the diversion of cold air into the generator air gap.
5. The integrated semi-direct drive wind turbine stator according to claim 1, wherein Both the water inlet (4) and the water outlet (5) are provided with flanges facilitating detachable connection with the water cooler. The connection surface of each flange is provided with a sealing ring.
6. The stator of the integrated semi-direct drive wind turbine according to claim 1, wherein At the outlet of each drain pipe (10), there is a drain pipe plug (101).
7. The stator of the integrated semi-direct drive wind turbine according to claim 1, characterized in that On the side arm of the frame (1), there is also a frame observation hole facilitating the observation of the operating state at the connection between the generator and the gearbox (17). The frame observation hole is provided with a transparent observation hole cover plate (8).
8. The integrated semi-direct drive wind turbine stator according to claim 1, characterized in that Both the connection end flange and the non - connection end flange of the frame (1) are provided with lifting lugs (7) facilitating hoisting.
9. The integrated semi-direct drive wind turbine stator according to claim 1, characterized in that, The main power connection box (6) includes a main wiring box frame fixed at one end to the side of the frame (1), and at the other end, there is a detachable main wiring box cover plate (61). The top of the main wiring box frame is an outgoing line board (62). The outgoing line board (62) is provided with multiple through holes facilitating the upward outgoing of phase cable wires (14). The through holes are provided with first gland heads (63) for sealing and fastening the upward outgoing of phase cable wires (14).
10. The stator of the integrated semi-direct drive wind turbine according to claim 1, characterized in that Between the main power connection box (6), the auxiliary power connection box (13) and the frame (1), there are insulating plates (68) facilitating the frame (1) to form a closed space.