CN106837703B - semi-direct-drive wind driven generator - Google Patents
semi-direct-drive wind driven generator Download PDFInfo
- Publication number
- CN106837703B CN106837703B CN201710240751.4A CN201710240751A CN106837703B CN 106837703 B CN106837703 B CN 106837703B CN 201710240751 A CN201710240751 A CN 201710240751A CN 106837703 B CN106837703 B CN 106837703B
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- China
- Prior art keywords
- groove type
- end cover
- type front
- carbon brush
- gear box
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/50—Kinematic linkage, i.e. transmission of position
- F05B2260/503—Kinematic linkage, i.e. transmission of position using gears
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
A semi-direct-drive wind driven generator comprises a primary gear box, a secondary gear box, a groove type front end cover and a generator, wherein a connecting flange connected with the groove type front end cover is arranged on the primary gear box; the secondary gearbox is mounted on the primary gearbox; one end of the primary gear box, which is provided with the secondary gear box, is connected with the groove type front end cover through the connecting flange, so that the secondary gear box is embedded into the groove type front end cover, and the groove type front end cover is connected with the driving end of the generator to form an integral structure. The invention can enable the whole gravity center of the semi-direct-drive wind driven generator to be in a more reasonable position, thereby enabling the semi-direct-drive wind driven generator to have compact structure, good mechanical property and long service life.
Description
Technical Field
the invention relates to a wind driven generator, in particular to a semi-direct-drive wind driven generator.
Background
In a semi-direct-drive wind driven generator, the generator is an energy conversion device, the gear box is a transmission device, and the connection mode of the generator and the gear box directly influences the safety and reliability of the whole unit. Fig. 1 is a schematic structural diagram of a half-direct-drive wind driven generator in the prior art, and as shown in fig. 1, the half-direct-drive wind driven generator in the prior art is connected with a motor through a connecting flange arranged on a secondary gearbox to form a generator whole. The whole body is arranged in a cabin of the wind generating set through a torque arm of the gear box, the gear box and the generator belong to a cantilever structure, the secondary gear box is used as a main body for bearing the gravity and the torque of the motor, the load borne by the secondary gear box is very large, the secondary gear box is a relatively weak link of the whole gear box, and the service life of the secondary gear box is difficult to guarantee under the condition of long-term operation.
therefore, there is a need for an improved half direct drive wind generator.
Disclosure of Invention
The invention aims to provide a semi-direct-drive wind driven generator which is compact in structure, good in stress performance and reasonable in overall gravity center position.
The invention provides a semi-direct-drive wind driven generator which comprises a primary gear box, a secondary gear box, a groove type front end cover and a generator, wherein a connecting flange connected with the groove type front end cover is arranged on the primary gear box; the secondary gearbox is mounted on the primary gearbox; one end of the secondary gear box is mounted in the primary gear box and is connected with the groove type front end cover through the connecting flange, so that the secondary gear box is embedded into the groove type front end cover, and the groove type front end cover is connected with the driving end of the generator to form an integral structure;
The semi-direct-drive wind driven generator is internally provided with a grounding carbon brush which is arranged in a groove type front end cover of the wind driven generator and used for leading out and grounding current on a transmission shaft of the generator; the top of the groove type front end cover is provided with a bearing seat hole which is coaxial with the groove type front end cover and is used for installing a bearing unit; the bearing unit comprises a grounding ring, the grounding ring is located on the inner side of the groove type front end cover and is in contact with the bearing, the grounding ring is fixed on the transmission shaft through threads and is fixed through a bearing outer cover of the bearing unit, and a side wall through hole for the grounding carbon brush to pass through is formed in the side wall of the bearing outer cover, so that the grounding carbon brush is in contact with the grounding ring to lead out current on the transmission shaft.
Preferably, the groove type front end cover comprises a cylindrical part and a conical part connected with the cylindrical part, a bearing seat hole is formed in the top of the conical part, and a transmission shaft of the generator penetrates through the bearing seat hole;
As a preferable mode, a rib plate is arranged on the outer side of the groove type front end cover and used for increasing the strength of the groove type front end cover.
preferably, the groove type front end cover comprises a first flange and a second flange;
The first flange is arranged at the free end of the cylindrical part of the groove type front end cover and is used for being connected with the primary gear box; the second flange is arranged at the joint of the cylindrical part and the conical part of the groove type front end cover and is used for fixing the groove type front end cover on the shell of the generator.
Preferably, the secondary gearbox is mounted on the primary gearbox, embedded in the groove of the groove type front end cover, and has a gap with the side wall of the groove type front end cover.
Preferably, a liquid cooling pipeline is arranged on the periphery of the bearing seat hole and is positioned on the inner side of the groove type front end cover; and the liquid cooling pipeline is provided with a pipeline cover plate for sealing the liquid cooling pipeline.
Preferably, the liquid cooling pipeline is an unclosed annular structure with a rectangular cross section.
Preferably, an inner grease injection pipeline leading to the bearing seat hole is arranged at the top of the conical part of the groove type front end cover, an outer grease injection pipeline is welded at the inlet end of the inner grease injection pipeline, the outer grease injection pipeline is tightly attached to the inner wall of the groove type front end cover and fixed through a fixing clamp, and the front end cover extends out of the through hole arranged at the cylindrical part of the inner wall of the groove type front end cover.
As the preferred mode, annotate the part that the entry liquid cooling pipeline of fat inner tube way does not pass through, the exit end sets up on the lateral wall of bearing housing hole to can guarantee that lubricating grease can flow into bearing unit and lubricate the bearing.
Preferably, the grounded carbon brush comprises a carbon brush installed in a carbon brush conduit, a scale, a hold-down spring, a first propulsion device, and a second propulsion device, wherein,
The carbon brush comprises a brush head and a braid closely connected with the brush head, the diameter of the brush head is larger than that of the braid, and the length of the braid is large enough to extend out of the groove type front end cover;
One end of the brush braid is fixedly connected with the brush head, and the other end of the brush braid sequentially penetrates through the first propelling device and the second propelling device which are arranged in the carbon brush guide pipe and the scale sleeved with the compression spring and extends out of the tail end of the carbon brush guide pipe, so that the brush head is abutted against the first propelling device;
The tail end of the carbon brush guide pipe is provided with a plug screw with a through hole at the center, the compression spring is compressed and sealed inside the carbon brush guide pipe, so that the free end of the brush head can extend out of the head end of the carbon brush guide pipe to be contacted with the grounding ring, the current on the transmission shaft can be led out, and the carbon brush is grounded through the brush braid.
Preferably, a torsion arm is arranged at one end of the primary gearbox, which is connected with the groove type front end cover, and is used for bearing the whole transmission structure.
the invention is characterized in that the front end cover of the driving end of the generator adopts a groove type structure, the connecting flange of the gear box is designed on the primary gear box, the secondary gear box is embedded in the groove type front end cover, the bearing of the whole transmission structure is mainly concentrated on the torque arm of the gear box, so that the whole gravity center is positioned at a more reasonable position, the stress performance of the generator set is improved, the service life of the generator set is prolonged, and the whole integrated unit structure is more compact.
In addition, a liquid cooling pipeline is added, so that the cooling effect is improved; the grease injection pipeline is arranged on the groove type front end cover, and the outlet is led out of the gear box through the welding grease injection outer pipeline, so that the service life of the grease injection pipeline is prolonged, and the later maintenance cost can be reduced; and the design of the grounding carbon brush can not only eliminate the influence of shaft current on the shaft, but also facilitate the replacement of the carbon brush and prolong the service life of the generator.
Drawings
The drawings used in the present application will be briefly described below, and it should be apparent that they are merely illustrative of the concepts of the present invention.
Fig. 1 is a schematic structural diagram of a semi-direct-drive wind driven generator in the prior art.
fig. 2 is a schematic cross-sectional view of the whole structure of a semi-direct-drive wind driven generator according to an embodiment of the invention.
FIG. 3 is a schematic axial sectional view of a front end cover of a groove type of a half-direct-drive wind turbine according to an embodiment of the present invention.
FIG. 4 is a left side view of a recessed front end cap of a semi-direct drive wind turbine according to an embodiment of the present invention.
FIG. 5 is a schematic axial cross-sectional view of a recessed front end cover of a semi-direct drive wind turbine according to another embodiment of the present invention.
Fig. 6 is a schematic cross-sectional view of a first structure of a grounded carbon brush of a half-direct-drive wind turbine according to an embodiment of the invention.
Fig. 7 is a schematic cross-sectional view of a second structure of a grounded carbon brush of a half-direct-drive wind turbine according to an embodiment of the invention.
Detailed Description
Hereinafter, embodiments of the semi-direct drive wind power generator of the present invention will be described with reference to the accompanying drawings.
the examples described herein are specific embodiments of the present invention, are intended to be illustrative and exemplary in nature, and are not to be construed as limiting the scope of the invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include any obvious replacement or modification of the embodiments described herein.
The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of respective portions and their mutual relationships. It is noted that the drawings are not necessarily to the same scale so as to clearly illustrate the structure of portions of embodiments of the present invention. The same or similar reference numerals are used to denote the same or similar parts.
Referring to fig. 1, a semi-direct drive wind driven generator in the prior art is connected with a motor 5 through a connecting flange arranged on a secondary gearbox 2 to form a generator whole. The whole body is arranged in a cabin of the wind generating set through a torque arm of the gear box, the gear box and the generator belong to a cantilever structure, the secondary gear box 2 is used as a main body for bearing the gravity and the torque of the motor, the load borne by the secondary gear box is very large, the secondary gear box 2 is a relatively weak link of the whole gear box, and the service life of the secondary gear box is difficult to guarantee under the condition of long-term operation.
referring to fig. 2, the semi-direct drive wind driven generator according to the embodiment of the invention comprises a primary gear box 1, a secondary gear box 2, a groove type front end cover 3, a generator 5 and the like, wherein the primary gear box 1 and the generator 5 are connected into an integral structure through the groove type front end cover 3, the secondary gear box 2 is mounted on the primary gear box 1 and embedded in the groove type front end cover 3, and a certain gap is formed between the secondary gear box 2 and the side wall of the groove type front end cover 3 to prevent mutual interference during operation.
Compared with the semi-direct-drive wind driven generator shown in fig. 1, the front end cover of the driving end of the generator of the embodiment adopts a groove type structure, the connecting flange 11 of the gear box is designed on the primary gear box 1, and the secondary gear box 2 is embedded in the groove type front end cover 3, so that the bearing of the whole transmission structure is mainly concentrated on the torsion arm of the gear box, the whole gravity center is in a more reasonable position, the stress performance of the unit is improved, and the whole integrated unit structure is more compact.
Referring to fig. 3, the front end cap 3 includes a cylindrical portion 38 and a conical portion 39 connected to the cylindrical portion, a bearing seat hole 33 is formed at the top of the conical portion 39 and is coaxial with the front end cap for mounting a bearing and allowing a transmission shaft to pass through, and a rib 36 is formed outside the front end cap 3 to increase the strength of the front end cap 3. A first flange 31 is arranged at the free end of the cylindrical part 38 of the groove type front end cover 3 and is used for being connected with the primary gear box 1; a second flange 32 is provided at the intersection of the cylindrical portion 38 and the conical portion 39 of the front housing 3 for securing the front housing 3 to the housing of the motor 5.
referring to fig. 3 and 4, a liquid cooling pipe 34 is disposed at the periphery of the bearing seat hole 33 at the inner side of the groove of the recessed front end cover 3, a space for installing the bearing outer cover 72 is reserved between the liquid cooling pipe 34 and the bearing seat hole 33, a pipe cover plate 341 for sealing is installed on the liquid cooling pipe 34, and a liquid inlet 342 and a liquid outlet 343 are disposed at two ends of the pipe cover plate 341 to ensure that cooling liquid flows along the liquid cooling pipe 34 for one circle after entering the liquid cooling pipe 34 from the liquid inlet 342, so as to take away heat generated by the bearing in operation and discharge the heat through the liquid outlet 343.
as can be seen from fig. 3 and 4, the liquid cooling pipe 34 of the present embodiment is an unclosed annular structure with a rectangular cross section, and a counter bore is provided at the position where the pipe cover 341 is installed, so that the pipe cover 341 is not higher than the inner surface of the groove-structured groove-type front end cover 3 after being installed on the liquid cooling pipe 34, so as to avoid obstructing the installation of the bearing outer cover 72; a liquid inlet pipe 344 and a liquid outlet pipe 345 are welded on the liquid inlet 342 and the liquid outlet 343 of the pipeline cover plate 341; the liquid inlet pipe 344 and the liquid outlet pipe 345 are fixed by a fixing clip, closely attached to the inner wall of the recessed front end cover 3, and extend out of the recessed front end cover 3 at the cylindrical part 38 of the recessed front end cover 3. The liquid inlet pipe 344 and the liquid outlet pipe 345 are arranged on the liquid inlet 342 and the liquid outlet 343 of the pipeline cover plate 341, so that the cooling liquid can smoothly enter the liquid cooling pipeline 34 from the outside of the gear box, and the cooling liquid carrying the heat of the bearing can be discharged out of the gear box, thereby not only improving the cooling effect, but also recycling the cooling liquid and saving resources.
preferably, the inner diameter of the liquid cooling pipe 34 is 620 mm-650 mm, the depth and width are 10 mm-30 mm, and the liquid inlet pipe 344 and the liquid outlet pipe 345 are stainless steel seamless steel pipes.
It should be understood that the size of the liquid cooling pipe 34 is not limited to the above-described size, but is specifically set according to different situations; the cross section of the liquid cooling pipe 34 is not limited to a rectangle, and may be in other shapes as long as the function is satisfied, such as a semicircle, a trapezoid, etc.; the material of the liquid inlet pipe 344 and the liquid outlet pipe 345 is not necessarily stainless steel seamless steel pipe, and can also be other corrosion-resistant materials; the connection of the inlet pipe 344 and the outlet pipe 345 to the inlet 342 and the outlet 343 is not limited to welding, and may be a connection such as a screw connection.
As shown in fig. 3 and 4, an inner grease injecting pipe 35 is disposed on the recessed front end cap 3, the inner grease injecting pipe 35 is a through hole leading from the inner side of the recessed front end cap 3 to the bearing seat hole 33, an inlet end of the through hole is located between the liquid inlet 342 and the liquid outlet 343 of the liquid cooling pipe 34 (a portion where the liquid cooling pipe 34 does not pass), and the other end is disposed on the side wall of the bearing seat hole 33, so as to ensure that grease can flow into the bearing unit 7 and lubricate the bearing.
referring to fig. 5, an outer grease injection pipeline 351 is welded to the inlet end of the inner grease injection pipeline 35, and the outer grease injection pipeline 351 is fixed by a fixing clip, clings to the inner wall of the recessed front end cover 3, and extends out of the recessed front end cover 3 from the cylindrical portion 38 of the inner wall of the recessed front end cover 3. Annotate outer pipeline 351 of fat through the welding and will annotate the fat entry and draw forth to the 3 outsides of slot type front end housing, guaranteed promptly annotate the reliability that interior pipeline 35 of fat, the outer pipeline 351 of annotating fat are connected, improved the convenience of later maintenance again to annotate that outer pipeline 351 of fat hugs closely 3 inner walls of slot type front end housing, avoid interfering with the second grade gear box.
A grease discharge port 721 for discharging grease is provided in the bearing outer cover 72, and a grease discharge pipe 722 extending out of the recessed front end cap 3 is welded to the grease discharge port 721 so as to discharge waste grease out of the bearing chamber when the grease needs to be replaced. The grease injection pipeline 351 and the grease discharge pipeline 722 are corrosion-resistant pipes, such as stainless steel seamless steel pipes.
The cylindrical part 38 of the groove type front end cover 3 is provided with holes for inserting the grounding carbon brush 6, the liquid inlet pipe 344, the liquid outlet pipe 345, the grease injection pipeline 351 and the grease discharge pipeline 722.
Referring to fig. 5, the bearing unit 7 further includes a grounding ring 73, the grounding ring 73 is located inside the recessed front cover 3 and contacts with the bearing, and is fixed on the transmission shaft through a screw thread, and the grounding ring 73 is fixed through a bearing outer cover 72, wherein the grounding ring 73 can rotate with the transmission shaft and also has the function of axially fixing the bearing; a sidewall through hole 723 through which the ground carbon brush 6 passes is provided in the sidewall of the bearing outer cover 72. The grounded carbon brush 6 can be mounted on the recessed front cover 3 through the sidewall through hole 723 of the bearing outer cover 72 and is in contact with the ground ring 73, thereby drawing out the shaft current.
Fig. 6 is a schematic cross-sectional view of a first structure of a grounded carbon brush 6 of a half-direct-drive wind turbine according to an embodiment of the present invention, where the grounded carbon brush 6 includes a carbon brush 62 installed in a carbon brush guide 61, a scale 66, a compression spring 65, a first propulsion device 63, and a second propulsion device 64. The carbon brush 62 comprises a brush head 621 and a braid 622, the brush head 621 and the braid 622 are both of cylindrical structures, and the diameter of the brush head 621 is larger than that of the braid 622; the length of the braid 622 is far longer than that of the brush head 621 enough to extend out of the groove type front end cover 3; one end of the brush braid 622 is fixedly connected with the brush head 621, and the other end of the brush braid passes through the first propulsion device 63 and the second propulsion device 64 which are arranged in the carbon brush guide pipe 61 and the scale 66 which is sleeved with the compression spring 65 in sequence and extends out of the tail end 613 of the carbon brush guide pipe, so that the brush head 621 abuts against the first propulsion device 63; the free end of the brush head 621 extends out of the head end of the carbon brush conduit 61, and the free end of the brush braid 622 extends out of the tail end 613 of the carbon brush conduit; a central screw 67 with a through hole is mounted at the carbon brush guide end 613 for sealing the compression spring 65.
It should be noted that the head end of the carbon brush guide 61 is the end connected to the ground ring 73, the tail end 613 of the carbon brush guide is the end penetrating through the recessed front cover 3, and the outer diameters of the carbon brush 62, the scale 66, the compression spring 65, the first propulsion unit 63, and the second propulsion unit 64 are smaller than the inner diameter of the carbon brush guide 61.
specifically, the carbon brush guide tube 61 is of a bent tube structure, a throat with the same radial and uniform reduction and the same axial inner diameter is arranged in the head end, a threaded interface is arranged at the tail end, the carbon brush guide tube can be just tightly attached to the inner wall of the groove type front end cover 3 during installation so as to avoid interference with the secondary gear box 2 during work, the length of the brush head 621 is larger than that of the throat 612, the length of the throat 612 is larger than that of the first propulsion device 63, the brush head 621 is located in the throat 612 at the head end of the carbon brush guide tube, a gap is reserved between the brush head 621 and the throat 612 at the head end of the carbon brush guide tube, so that the brush head 621 can move longitudinally in the carbon brush guide tube 61, the tail end 613 of the carbon brush guide tube is sealed by the screw plug 67 with.
The scale 66 comprises a scale body 661 with a handle 663 and an end cap 662 connected with the scale body, a through hole for the brush braid 622 to pass through is arranged in the center of the whole scale 66, a scale is marked at one end of the scale body 661 close to the handle 663, the length of the scale is equal to that of the first propelling device 63, and the scale is used for monitoring the propelling size of the carbon brush 62 so as to know whether the carbon brush 62 needs to be replaced. When installed, the body 661 of the scale 66 passes through the hold down spring 65 and traps the hold down spring 65 between the end cap 662 and the handle 663, and the shunt 622 is then passed through the through hole in the centre of the scale 66 to allow the scale 66 to enter the carbon brush conduit 61.
Further, a travel switch 69 matched with the scale 66 is arranged at the end 613 of the carbon brush guide pipe, a trigger switch is arranged on the travel switch 69, and when the handle 663 reaches the end 613 of the carbon brush guide pipe and contacts with the travel switch 69, the trigger switch is closed to send out an alarm signal to remind a worker to replace the carbon brush 62.
moreover, the first propulsion unit 63 is a plurality of corrosion-resistant cylinders with through holes in the centers, and the outer diameter of the corrosion-resistant cylinders is the same as that of the brush head 621 and can enter the necking 612 at the head end of the carbon brush conduit; the second propulsion device 64 is a plurality of corrosion-resistant balls with the diameter larger than that of the necking 612 at the head end of the carbon brush guide pipe, is arranged between the compression spring 65 and the first propulsion device 63, and is used for transmitting the pressure of the compression spring 65 to the first propulsion device 63.
When the grounding carbon brush 6 is assembled, the carbon brush guide pipe 61 sequentially passes through the grounding carbon brush through hole 37 on the groove type front end cover 3 for the carbon brush guide pipe 61 to pass through and the side wall through hole 723 of the bearing outer cover 72, and the carbon brush guide pipe 61 is fixed; then inserting the carbon brush 62 into the carbon brush guide 61, wherein the brush head 621 is located at the head end of the carbon brush guide 61; then, the first propelling device 63, the second propelling device 64 and the scale 66 of the plug screw 67 sleeved with the compression spring 65 and the plug screw 67 sequentially penetrate through the free end of the shunt 622 and enter the carbon brush guide pipe 61; finally, the compression spring 65 is compressed and packaged in the carbon brush guide pipe 61 through the screw plug 67.
It should be noted that the total length of the first propulsion device 63, the second propulsion device 64 and the compression spring 65 is larger than that of the carbon brush guide 61, so that the compression spring 65 is compressed when the screw plug 67 is installed, the compression degree of the compression spring 65 can be changed by changing the length of the second propulsion device 64, and the compression length of the compression spring 65 is larger than that of the first propulsion device 63, so that the first propulsion device 63 can be pushed into the carbon brush guide head end reducing opening 612 completely.
Thus, when the brush head 621 is worn, the compression spring 65 in the compressed state is expanded, so that a pressure is applied to the second propelling device 64 which is in contact with the brush head 621, and the second propelling device 64 transmits the pressure to the first propelling device 63, so that the first propelling device 63 carries the brush head 621 into the head end necking 612 of the carbon brush conduit; because the diameter of the second propulsion device 64 is larger than the head end necking 612 of the carbon brush conduit, when the first propulsion device 63 completely enters the head end necking 612 of the carbon brush conduit, the second propulsion device 64 can be clamped at the inlet of the head end necking 612 of the carbon brush conduit, so that the brush head 621 can be ensured to be in contact with the grounding ring 73 of the generator, the brush head 621 can be prevented from being excessively worn and being incapable of being replaced, and in addition, the cylinder of the first propulsion device 63 can be prevented from being clamped in the head end necking 612 of the carbon brush conduit.
The grounding carbon brush 6 is of an integrated structure, but the structure is too long and is not easy to install, so that the carbon brush guide pipe 61 of the grounding carbon brush 6 can be cut off and led out to the outer side of the groove type front end cover 3 through a straight external connecting pipe 68.
Referring to fig. 7, the external connection pipe 68 is detachably mounted to the end 613 of the carbon brush guide by a screw thread, so as to reduce the length of the carbon brush guide 61 and facilitate the mounting. The inner diameter of the external connecting pipe 68 is the same as that of the carbon brush guide pipe 61, and the carbon brushes 62, the scale 66, the compression spring 65, the first propelling device 63 and the second propelling device 64 can penetrate through the external connecting pipe; the two ends of the external connecting pipe 68 are provided with threads, the head end is used for connecting with the carbon brush guide pipe 61, and the tail end is used for connecting with the screw plug 67; and a stroke switch 69 is mounted on the end of the outer joint tube 68.
When the grounding carbon brush 6 is assembled, the carbon brush guide pipe 61 penetrates through the side wall through hole 723 of the bearing outer cover 72, and then the external connection pipe 68 penetrates through the grounding carbon brush through hole 37, through which the carbon brush guide pipe 61 penetrates, on the groove type front end cover 3 and is connected with the carbon brush guide pipe 61, so that the whole grounding carbon brush 6 is fixed in the groove type front end cover 3; inserting the carbon brush 62 into the carbon brush guide tube 61 from the external connection tube 68, wherein the brush head 621 is located at the head end of the carbon brush guide tube 61; sequentially enabling the first propelling device 63, the second propelling device 64 and the scale 66 sleeved with the compression spring 65 and the screw plug 67 to penetrate through the free end of the shunt 622 and enter a combined guide pipe formed by connecting the external connecting pipe 68 and the carbon brush guide pipe 61; finally, the compression spring 65 is compressed and packaged in the external connecting pipe 68 through the screw plug 67.
The external connecting pipe 68 is convenient to install, and the cost of later maintenance can be reduced.
It should be noted that the zero scale of the scale 66 is just at the end of the carbon brush guide 61 or the external connection pipe 68 before the two types of grounded carbon brushes 6 are put into operation, so as to ensure that the scale 66 can play a role in monitoring the wear condition of the carbon brush 62.
In addition, the shunt 622 in this embodiment is a copper wire, and it should be understood that the shunt 622 may be made of other materials as long as it is a deformable conductor with certain strength; the carbon brush guide 61 and the external connection pipe 68 in this embodiment are stainless seamless steel pipe corrosion-resistant pipes, and they may be made of other corrosion-resistant materials.
The invention adopts the groove type front end cover 3 structure, so that the secondary gear box 2 is embedded in the groove type front end cover 3, the gravity center of the semi-direct-drive wind driven generator can be positioned at a more reasonable position under the condition of not changing a torsion arm compared with the prior art, the stress performance of the generator set is improved, the service life of the generator set is prolonged, and the whole integrated unit structure is more compact; the liquid cooling pipeline 34 is added, so that the cooling effect is improved; in addition, the grease injection pipeline is arranged on the groove type front end cover 3, and the outlet is led out of the gear box through the welding pipeline, so that the service life of the grease injection pipeline is prolonged, and the later maintenance cost can be reduced; and the design of the grounding carbon brush 6 can not only eliminate the influence of shaft current on the shaft, but also facilitate the replacement of the carbon brush 62 and prolong the service life of the generator.
The embodiments of the semi-direct drive wind turbine of the present invention have been described above. The specific features such as shape, size and location for the semi-direct drive wind turbine of the present invention can be specifically designed according to the role of the above disclosed features, and such designs can be realized by those skilled in the art. Moreover, the technical features disclosed above are not limited to the combinations with other features disclosed, and other combinations between the technical features can be performed by those skilled in the art according to the purpose of the present invention, so as to achieve the purpose of the present invention.
Claims (5)
1. A semi-direct-drive wind driven generator comprises a primary gear box, a secondary gear box, a groove type front end cover and a generator, wherein,
A connecting flange connected with the groove type front end cover is arranged on the primary gear box;
The secondary gearbox is mounted on the primary gearbox;
One end of the secondary gear box is mounted in the primary gear box and is connected with the groove type front end cover through the connecting flange, so that the secondary gear box is embedded into the groove type front end cover, and the groove type front end cover is connected with the driving end of the generator to form an integral structure;
The semi-direct-drive wind driven generator is internally provided with a grounding carbon brush which is arranged in a groove type front end cover of the wind driven generator and used for leading out and grounding current on a transmission shaft of the generator;
The grounding carbon brush comprises a carbon brush arranged in a carbon brush guide pipe, a scale, a compression spring, a first propelling device and a second propelling device,
The carbon brush comprises a brush head and a braid closely connected with the brush head, the diameter of the brush head is larger than that of the braid, and the length of the braid is large enough to extend out of the groove type front end cover;
One end of the brush braid is fixedly connected with the brush head, and the other end of the brush braid sequentially penetrates through the first propelling device and the second propelling device which are arranged in the carbon brush guide pipe and the scale sleeved with the compression spring and extends out of the tail end of the carbon brush guide pipe, so that the brush head is abutted against the first propelling device;
A screw plug with a through hole in the center is installed at the tail end of the carbon brush guide pipe, the compression spring is compressed and sealed inside the carbon brush guide pipe, so that the free end of the brush head can extend out of the head end of the carbon brush guide pipe to be in contact with the grounding ring, current on the transmission shaft can be led out, and the brush braid is grounded;
The top of the groove type front end cover is provided with a bearing seat hole which is coaxial with the groove type front end cover and is used for installing a bearing unit;
The bearing unit comprises a grounding ring, the grounding ring is positioned on the inner side of the groove type front end cover and is in contact with the bearing, the grounding ring is fixed on the transmission shaft through threads and is fixed through a bearing outer cover of the bearing unit, and a side wall through hole for the grounding carbon brush to pass through is formed in the side wall of the bearing outer cover, so that the grounding carbon brush is in contact with the grounding ring to lead out the current on the transmission shaft;
The groove type front end cover comprises a cylindrical part and a conical part connected with the cylindrical part, the bearing seat hole is positioned at the top of the conical part, and a transmission shaft of the generator penetrates through the bearing seat hole;
the outer side of the groove type front end cover is provided with a rib plate for increasing the strength of the groove type front end cover; a liquid cooling pipeline is arranged at the periphery of the bearing seat hole and is positioned at the inner side of the groove type front end cover;
The liquid cooling pipeline is provided with a pipeline cover plate for sealing the liquid cooling pipeline;
A liquid inlet and a liquid outlet are arranged at two ends of the pipeline cover plate, and a liquid inlet pipe and a liquid outlet pipe are welded on the liquid inlet and the liquid outlet of the pipeline cover plate; the liquid inlet pipe and the liquid outlet pipe are tightly attached to the inner wall of the groove type front end cover, the cylindrical part of the groove type front end cover extends out of the outer side of the groove type front end cover, and the liquid cooling pipeline is of an unclosed annular structure with a rectangular cross section;
The top of the conical part of the groove type front end cover is provided with an inner grease injection pipeline leading to the bearing seat hole, the inlet end of the inner grease injection pipeline is welded with an outer grease injection pipeline, the outer grease injection pipeline is tightly attached to the inner wall of the groove type front end cover and is fixed through a fixing clamp, and the front end cover extends out of the through hole arranged at the cylindrical part of the inner wall of the groove type front end cover.
2. the semi-direct drive wind turbine of claim 1, wherein the recessed front end cap comprises a first flange and a second flange;
The first flange is arranged at the free end of the cylindrical part of the groove type front end cover and is used for being connected with the primary gear box;
The second flange is arranged at the joint of the cylindrical part and the conical part of the groove type front end cover and is used for fixing the groove type front end cover on the shell of the generator.
3. The half-direct drive wind turbine of claim 1, wherein the secondary gearbox is mounted on the primary gearbox and embedded in a groove of the squealer cap with clearance from side walls of the squealer cap.
4. The wind driven generator according to claim 1, wherein the inlet end of the grease-filled internal pipe is located at a portion where the liquid-cooled pipe does not pass through, and the outlet end is disposed on a sidewall of the bearing housing hole, thereby ensuring that grease can flow into the bearing unit and lubricate the bearing.
5. The wind driven generator as recited in claim 1, wherein a torsion arm is provided at an end of the primary gearbox connected to the front cover for carrying the entire transmission structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710240751.4A CN106837703B (en) | 2017-04-13 | 2017-04-13 | semi-direct-drive wind driven generator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710240751.4A CN106837703B (en) | 2017-04-13 | 2017-04-13 | semi-direct-drive wind driven generator |
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| CN106837703B true CN106837703B (en) | 2019-12-10 |
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| CN109038149A (en) * | 2018-08-16 | 2018-12-18 | 沧州华海风电设备科技技术开发有限公司 | Service life scale brush |
| CN109899231A (en) * | 2019-02-26 | 2019-06-18 | 泗阳高传电机制造有限公司 | A kind of paddle change system of wind turbines |
| CN109931224B (en) * | 2019-04-17 | 2021-05-07 | 上海电气风电集团股份有限公司 | Outer rotor type direct-drive wind generating set |
| CN114183307A (en) * | 2021-12-31 | 2022-03-15 | 南京高速齿轮制造有限公司 | Semi-direct-drive wind generating set |
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| CN106837703A (en) | 2017-06-13 |
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Effective date of registration: 20170630 Address after: 211113 Tao Dong Road, Jiangning economic and Technological Development Zone, Nanjing, Jiangsu Applicant after: Nanjing High Accurate Drive Electromechanical Automation Equipment Co., Ltd. Applicant after: Siyang high pass Motor Manufacturing Co., Ltd. Address before: 223799 the Yellow River, Siyang Province Economic Development Zone, Suqian Road, the north side of the road on the west side of Jiangsu Applicant before: Siyang high pass Motor Manufacturing Co., Ltd. |
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