Permanent magnet direct-drive wind driven generator and assembly method thereof
阅读说明：本技术 永磁直驱风力发电机及其装配方法 (Permanent magnet direct-drive wind driven generator and assembly method thereof ) 是由 朱昺 孙永岗 卢江跃 陈健 王海洋 马成斌 于 2019-09-16 设计创作，主要内容包括：本发明公开了一种永磁直驱风力发电机及其装配方法,永磁直驱风力发电机包括转子、定子、转轴和定轴,转轴上设有转轴法兰,定子上设置有定子法兰,定轴上设有定轴法兰和前机架法兰,定子法兰和定轴法兰的朝向前机架法兰的端面相连接且定轴法兰和定子法兰的直径均大于前机架法兰的直径,或定子法兰和定轴法兰的朝向转轴法兰的端面相连接且定轴法兰和定子法兰的直径均大于转轴法兰的直径。通过改变定轴法兰的结构,使得在装配时前机架法兰或者转轴法兰不会干涉定子,以实现对装配顺序的优化,实现先将定轴和转轴组装以后,再装配转子和定子,减少对大型起重机的占用时间,以利于大型永磁直驱风力发电机的批量化装配。(The invention discloses a permanent-magnet direct-drive wind driven generator and an assembly method thereof, the permanent-magnet direct-drive wind driven generator comprises a rotor, a stator, a rotating shaft and a fixed shaft, wherein the rotating shaft is provided with a rotating shaft flange, the stator is provided with a stator flange, the fixed shaft is provided with a fixed shaft flange and a front frame flange, the end surfaces of the stator flange and the fixed shaft flange, which face the front frame flange, are connected, and the diameters of the fixed shaft flange and the stator flange are both larger than the diameter of the front frame flange, or the end surfaces of the stator flange and the fixed shaft flange, which face the rotating shaft flange, are connected, and the diameters of the fixed shaft flange and the. Through the structure that changes the dead axle flange for front frame flange or pivot flange can not interfere the stator when the assembly, in order to realize the optimization to the assembly order, realize earlier after dead axle and pivot equipment, reassembling rotor and stator reduces the occupation time to large crane, in order to do benefit to large-scale permanent magnetism and directly drive aerogenerator's batched assembly.)
1. A permanent magnet direct-drive wind driven generator comprises a rotor, a stator, a rotating shaft and a fixed shaft, and is characterized in that a rotating shaft flange is arranged on the rotating shaft, a stator flange is arranged on the stator, a fixed shaft flange and a front frame flange are arranged on the fixed shaft, the front frame flange is positioned at one end of the fixed shaft, the rotating shaft is sleeved at the other end of the fixed shaft, the fixed shaft flange is positioned between the front frame flange and the rotating shaft flange in the axial direction of the fixed shaft, and the rotor is connected with the rotating shaft flange; the stator flange and the dead axle flange face the end face of the front frame flange and are connected, and the diameters of the dead axle flange and the stator flange are larger than the diameter of the front frame flange, or the stator flange and the dead axle flange face the end face of the rotating shaft flange and are connected, and the diameters of the dead axle flange and the stator flange are larger than the diameter of the rotating shaft flange.
2. The permanent magnet direct drive wind power generator as claimed in claim 1, wherein a bearing is connected between said rotating shaft and said dead axle.
3. The permanent magnet direct drive wind generator as set forth in claim 2 wherein said bearing comprises a first bearing and a second bearing, said first bearing being proximate said stator flange and said second bearing being distal from said stator flange.
4. The permanent magnet direct drive wind power generator as set forth in claim 1, wherein said rotor is bolted to said shaft flange and said stator flange is bolted to said dead axle flange.
5. The permanent magnet direct-drive wind power generator as claimed in claim 1, wherein a rotor flange is arranged on the rotor, a plurality of first through holes are arranged on the rotor flange, a plurality of first threaded holes are arranged on the rotating shaft flange, and the first through holes and the first threaded holes are in one-to-one correspondence.
6. The permanent magnet direct-drive wind driven generator according to claim 1, wherein a plurality of second through holes are formed in the stator flange, a plurality of second threaded holes are formed in the dead axle flange, and the second through holes correspond to the second threaded holes one to one.
7. The permanent magnet direct drive wind power generator as set forth in claim 1, wherein said rotor comprises a rotor body and a rotor cover plate, said rotor cover plate being connected to said rotor body, said rotor cover plate being spaced from said stator on a side thereof adjacent to said front frame flange, said rotor body being connected to said spindle flange, said rotor body and said rotor cover plate simultaneously rotating around said stator and said spindle.
8. The permanent magnet direct drive wind power generator as claimed in claim 7, wherein said rotor cover plate is circular ring shaped, and said rotor cover plate is bolted to said rotor body.
9. An assembly method for assembling a permanent magnet direct drive wind generator according to any of claims 1-8, characterized in that the assembly method comprises the steps of:
s1: connecting the rotating shaft with the fixed shaft through a bearing;
s2: if the diameters of the fixed shaft flange and the stator flange are both larger than the diameter of the front frame flange, the step S2.1 is performed, if the diameters of the fixed shaft flange and the stator flange are both larger than the diameter of the rotating shaft flange, the step S2.2 is performed,
s2.1, integrally hoisting the connected rotating shaft and the fixed shaft to be sleeved into the rotor body, connecting the rotor flange with the rotating shaft flange, and then sleeving the stator on the fixed shaft from one side of the front rack flange and connecting the stator with the fixed shaft flange;
s2.2: hoisting the stator, sleeving the connected whole of the rotating shaft and the fixed shaft from one end of the rotating shaft, connecting the stator with the fixed shaft flange, hoisting the rotor body and sleeving the rotor body into the rotating shaft and connecting the rotor body with the rotating shaft flange,
after completion of step S2.1 or step S2.2, the flow proceeds to step S3,
s3: connecting the rotor cover plate with the rotor body.
Technical Field
The invention relates to the field of wind power generation, in particular to a permanent magnet direct-drive wind driven generator and an assembly method thereof.
Background
The direct-drive permanent magnet wind driven generator adopts a permanent magnet generator, and a wind wheel is directly coupled with a motor, so that a heavy speed-up gear box is omitted, and the direct-drive permanent magnet wind driven generator has the advantages of high efficiency, low noise, long service life, reduced unit volume, reduced operation and maintenance cost and the like.
The direct-drive wind driven generator mainly comprises a stator and a rotor, wherein the stator is connected with a fixed shaft through a flange, the rotor is connected with a rotating shaft through a flange, and the fixed shaft is connected with a rotating shaft bearing so as to realize the relative rotation of the rotor and the stator. In the prior art, due to the structure of the fixed shaft and the rotating shaft, during assembly, the stator and the fixed shaft are connected, the rotor and the rotating shaft are connected, and then the fixed shaft and the rotating shaft are assembled, namely the fixed shaft and the rotating shaft are assembled together with the rotor and the stator. Along with the direct-drive wind driven generator is larger and larger in size and heavier, the hoisting requirement is higher and higher, a large crane is occupied according to the assembling sequence, and the mass production is not facilitated.
Disclosure of Invention
The invention aims to overcome the defects that a large crane is occupied and mass production is not facilitated due to the fact that a rotor and a stator need to be assembled together when a fixed shaft and a rotating shaft are assembled due to the structure of the rotating shaft and the fixed shaft in the prior art, and the permanent magnet direct-drive wind driven generator and the assembling method thereof are provided.
The invention solves the technical problems through the following technical scheme:
a permanent-magnet direct-drive wind-driven generator comprises a rotor, a stator, a rotating shaft and a fixed shaft, a rotating shaft flange is arranged on the rotating shaft, a stator flange is arranged on the stator, a fixed shaft flange and a front frame flange are arranged on the fixed shaft, the front frame flange is positioned at one end of the dead axle, the rotating axle is sleeved at the other end of the dead axle, the dead axle flange is positioned between the front frame flange and the rotating shaft flange in the axial direction of the dead axle, the rotor is connected with the rotating shaft flange, wherein the end surfaces of the stator flange and the dead axle flange facing the front frame flange are connected and the diameters of the dead axle flange and the stator flange are both larger than the diameter of the front frame flange, or the stator flange and the dead axle flange are connected towards the end face of the rotating shaft flange, and the diameters of the dead axle flange and the stator flange are larger than that of the rotating shaft flange.
In this scheme, through the structure that changes dead axle flange and preceding frame flange, perhaps, change the structure of dead axle flange and pivot flange for preceding frame flange or pivot flange can not interfere the stator when the assembly, thereby realize the optimization to the assembly order, realize earlier with dead axle and pivot after the equipment, last reassembling rotor and stator reduce the occupation time to large-scale assembly hoist, in order to do benefit to large-scale permanent magnetism and directly drive aerogenerator's batched installation.
Preferably, a bearing is connected between the rotating shaft and the fixed shaft.
In the scheme, a bearing is connected between the rotating shaft and the fixed shaft to realize the rotation of the rotating shaft relative to the fixed shaft.
Preferably, the bearing comprises a first bearing proximate the stator flange and a second bearing distal from the stator flange.
In this scheme, all set up the bearing at the both ends of pivot, do benefit to and improve the pivot for the stationary shaft pivoted stationarity, that is to say rotor for stationary shaft and stator pivoted stationarity.
Preferably, the rotor is bolted to the rotating shaft flange, and the stator flange is bolted to the fixed shaft flange.
In this scheme, bolted connection convenient to detach, easy maintenance.
Preferably, a rotor flange is arranged on the rotor, a plurality of first through holes are formed in the rotor flange, a plurality of first threaded holes are formed in the rotating shaft flange, and the first through holes correspond to the first threaded holes one to one.
Preferably, a plurality of second through holes are formed in the stator flange, a plurality of second threaded holes are formed in the dead axle flange, and the second through holes correspond to the second threaded holes one to one.
In this scheme, set up the through-hole on stator flange and rotor flange, the bolt of being convenient for passes, set up the fixed of screw hole bolt of being convenient for on dead axle flange and pivot flange.
Preferably, the rotor includes a rotor body and a rotor cover plate, the rotor cover plate is connected to the rotor body, the rotor cover plate is spaced from the stator on a side close to the front frame flange, the rotor body is connected to the rotating shaft flange, and the rotor body and the rotor cover plate rotate around the stator and the fixed shaft simultaneously.
In this scheme, the rotor is provided in two parts, so as to facilitate the assembly of the rotor and the stator, in order to avoid the problem that the rotor and the stator cannot be assembled due to interference when the rotor and the stator are assembled.
Preferably, the rotor cover plate is circular, and the rotor cover plate is connected with the rotor body through bolts.
In this scheme, the rotor apron sets up to the ring form, and the rotor apron of being convenient for on the one hand is connected with rotor body, and on the other hand is favorable to improving the rotor apron along with the stationarity of pivot when rotating, and the processing of also being convenient for moreover. The rotor cover plate is connected with the rotor body through bolts, and installation and disassembly are facilitated.
An assembly method for assembling a permanent magnet direct drive wind generator as described above, characterized in that the assembly method comprises the steps of:
s1: connecting the rotating shaft with the fixed shaft through a bearing;
s2: if the diameters of the fixed shaft flange and the stator flange are both larger than the diameter of the front frame flange, the step S2.1 is performed, if the diameters of the fixed shaft flange and the stator flange are both larger than the diameter of the rotating shaft flange, the step S2.2 is performed,
s2.1, integrally hoisting the connected rotating shaft and the fixed shaft to be sleeved into the rotor body, connecting the rotor flange with the rotating shaft flange, and then sleeving the stator on the fixed shaft from one side of the front rack flange and connecting the stator with the fixed shaft flange;
s2.2: hoisting the stator, sleeving the connected whole of the rotating shaft and the fixed shaft from one end of the rotating shaft, connecting the stator with the fixed shaft flange, hoisting the rotor body and sleeving the rotor body into the rotating shaft and connecting the rotor body with the rotating shaft flange,
after completion of step S2.1 or step S2.2,
s3: connecting the rotor cover plate with the rotor body.
In this scheme, assemble into a little assembly body with dead axle and pivot with small crane earlier, then according to the structural feature of dead axle flange, accomplish the equipment of rotor and stator, whole process greatly reduced large crane's use amount. The number of the small-tonnage cranes in the production workshop is far more than that of the large-tonnage cranes, so that the assembly sequence can be used for assembling a plurality of generators simultaneously, and the mass production is facilitated.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows: according to the invention, the structure of the dead axle flange of the permanent magnet direct-drive wind driven generator is improved, so that during assembly, the rotating shaft and the dead axle can be assembled into a small assembly body, and then the stator and the rotor body are installed according to the structural characteristics of the dead axle flange. The assembly sequence greatly reduces the use amount of the large crane, is beneficial to simultaneously carrying out the assembly of a plurality of generators and is beneficial to batch production.
Drawings
Fig. 1 is a schematic structural diagram of a permanent magnet direct-drive wind power generator according to embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of a fixed shaft in the permanent magnet direct-drive wind turbine according to embodiment 1 of the present invention.
Fig. 3 is a schematic structural diagram of the permanent magnet direct-drive wind turbine according to embodiment 1 of the present invention, in which the first bearing is installed in the fixed shaft.
Fig. 4 is a schematic structural view of a permanent magnet direct-drive wind turbine generator according to embodiment 1 of the present invention, in which a rotating shaft is sleeved in a first bearing.
Fig. 5 is a schematic structural view of the permanent magnet direct-drive wind turbine according to embodiment 1 of the present invention after the second bearing is installed between the rotating shaft and the fixed shaft.
Fig. 6 is a schematic structural view of the permanent magnet direct-drive wind turbine according to embodiment 1 of the present invention after the rotor body is flange-connected to the rotating shaft.
Fig. 7 is a schematic structural view of the permanent magnet direct-drive wind turbine according to embodiment 1 of the present invention after the stator is connected to the dead axle flange.
Fig. 8 is a schematic structural view of a rotor cover plate and a rotor body in a permanent magnet direct-drive wind turbine according to embodiment 1 of the present invention after being connected.
Fig. 9 is a schematic assembly flow diagram of the permanent magnet direct-drive wind turbine according to embodiment 1 of the present invention.
Fig. 10 is a schematic structural diagram of a permanent magnet direct-drive wind power generator according to embodiment 2 of the present invention.
Fig. 11 is a schematic structural view of the permanent magnet direct-drive wind turbine according to embodiment 2 of the present invention after the stator is connected to the dead axle flange.
Fig. 12 is a schematic structural view of a rotor body and a rotating shaft flange in a permanent magnet direct-drive wind turbine according to embodiment 2 of the present invention.
Fig. 13 is a schematic structural view of a rotor cover plate and a rotor body in a permanent magnet direct-drive wind turbine according to embodiment 2 of the present invention after being connected.
Fig. 14 is a schematic assembly flow diagram of a permanent magnet direct-drive wind turbine according to embodiment 2 of the present invention.
Description of reference numerals:
S1-S3
Detailed Description
The present invention will be more clearly and completely described below by way of examples and with reference to the accompanying drawings, but the present invention is not limited thereto.
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