CN112049760B - Integrated structure of gear box and generator of wind generating set and method for assembling and disassembling on tower - Google Patents

Integrated structure of gear box and generator of wind generating set and method for assembling and disassembling on tower Download PDF

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Publication number
CN112049760B
CN112049760B CN202010947998.1A CN202010947998A CN112049760B CN 112049760 B CN112049760 B CN 112049760B CN 202010947998 A CN202010947998 A CN 202010947998A CN 112049760 B CN112049760 B CN 112049760B
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CN
China
Prior art keywords
generator
gear box
shell
generating set
integrated structure
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Application number
CN202010947998.1A
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Chinese (zh)
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CN112049760A (en
Inventor
余民姚
周祖田
韩花丽
仵文松
母芝验
曾昌勇
陈薛梅
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CSIC Haizhuang Windpower Co Ltd
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CSIC Haizhuang Windpower Co Ltd
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Priority to CN202010947998.1A priority Critical patent/CN112049760B/en
Publication of CN112049760A publication Critical patent/CN112049760A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D15/00Transmission of mechanical power
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D13/00Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/10Assembly of wind motors; Arrangements for erecting wind motors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D80/00Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/50Maintenance or repair
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D80/00Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/70Bearing or lubricating arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D80/00Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/80Arrangement of components within nacelles or towers
    • F03D80/82Arrangement of components within nacelles or towers of electrical components
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D80/00Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/80Arrangement of components within nacelles or towers
    • F03D80/88Arrangement of components within nacelles or towers of mechanical components
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D9/00Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20Wind motors characterised by the driven apparatus
    • F03D9/25Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K7/00Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction

Abstract

The invention discloses an integrated structure of a gear box and a generator of a wind generating set, wherein the gear box and the generator are both arranged in a cabin, a shell of the gear box is detachably and fixedly connected with a shell of the generator, and boss spigot positioning and pin hole positioning are also arranged; the gear box is characterized by also comprising a planetary gear train, a gear box output shaft, a coupler, a generator shaft, a hollow pipe and labyrinth seals; the invention also discloses a tower mounting and dismounting method of the integrated structure of the gear box and the generator of the wind generating set, which is convenient for separating the gear box from the generator without scratching the tooth surface of the sun gear, greatly reduces the maintenance cost, saves the maintenance time and improves the maintenance efficiency. The technical scheme has the advantages of compact structure, good centering and extremely high transmission reliability, so that the transmission chain is well balanced in three most important aspects of structure compactness, transmission reliability and good maintainability.

Description

Integrated structure of gear box and generator of wind generating set and method for assembling and disassembling on tower
Technical Field
The invention relates to the technical field of wind power generation, in particular to an integrated structure of a gear box and a generator of a wind generating set and a method for disassembling and assembling on a tower.
Background
Wind power generation refers to converting kinetic energy of wind into electric energy. Wind energy is a clean and pollution-free renewable energy source, and is used by people for a long time, mainly by pumping water, grinding surfaces and the like through windmills, and people are interested in how to use wind to generate electricity. The wind power generation is very environment-friendly, and the wind energy is huge, so that the wind power generation is increasingly paid attention by various countries in the world. Wind power is inexhaustible. The wind power generation device is very suitable for and can be used for generating electricity by utilizing wind power according to local conditions in coastal islands, grassland pasturing areas, mountain areas and plateau areas with water shortage, fuel shortage and inconvenient traffic. The wind generating set is a device for capturing wind energy and converting the wind energy into electric energy by blades, and mainly comprises a tower, a cabin and a wind wheel system.
The connection mode of the gearbox and the generator in the existing speed-up type wind generating set transmission chain is that the gearbox and the generator are respectively completely independent, the gearbox and the generator are respectively supported by the independent support and are connected by a coupler, the connection structure is not compact enough, the transmission chain is long, the output shaft of the gearbox and the generator shaft are difficult to be in a centering state due to the fact that the torque of the gearbox is continuously changed due to the change of the wind speed, and the gearbox and the generator continuously bear the changed additional load, so that the reliability of the transmission chain is influenced; the other type is that the gearbox and the generator are completely fused into a component, and the connection mode is very compact, the reliability required by the mode is very high, the quality control difficulty is high, the maintainability is poor, once a fault occurs, the gearbox and the generator of the transmission chain must be integrally taken down to the tower for treatment, and meanwhile, the wind wheel must be taken down to the tower, so that a great risk exists.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an integrated structure of a gear box and a generator of a wind generating set and a method for disassembling and assembling a tower, which aim to solve the problems in the background art that: the gearbox and the generator are respectively and completely and independently connected, the connection structure is not compact enough, the transmission chain is long, the output shaft of the gearbox and the generator shaft are difficult to be in a centering state, and the gearbox and the generator continuously bear variable additional loads, so that the reliability of the transmission chain is influenced; secondly, the gearbox and the generator are completely fused into one part, the quality control difficulty is high, the maintainability is poor, once the fault occurs, the gearbox and the generator of the transmission chain must be integrally placed on the tower for treatment, and meanwhile, the wind wheel must be placed on the tower, so that the problem of great risk exists. The invention aims to provide a connecting technology of a gearbox and a generator, which has compact structure, improves the reliability of a transmission chain, has good maintainability, and ensures that the transmission chain is well balanced in three most important aspects of the compact structure, the transmission reliability and the good maintainability.
In order to solve the technical problem, the technical scheme adopted by the invention is as follows:
an integrated structure of a gear box and a generator of a wind generating set is characterized in that the gear box and the generator are both arranged in a cabin, a shell of the gear box is detachably and fixedly connected with a shell of the generator, and boss spigot positioning and pin hole positioning are arranged between the shell of the gear box and the shell of the generator;
the gear box is characterized by also comprising a planetary gear train, a gear box output shaft, a coupler, a generator shaft, a hollow pipe and labyrinth seals;
the planetary gear train is arranged in the gear box;
one end of the output shaft of the gear box is coaxially fixed with the sun gear of the planetary gear train, the other end of the output shaft of the gear box is provided with a first tooth, and the output shaft of the gear box is provided with a first through hole along the axis;
the coupler is provided with second teeth, the coupler is connected with the output shaft of the gear box through the meshed coaxial key teeth of the first teeth and the second teeth, and the coupler is provided with second through holes along the axis;
the generator shaft is fixedly connected with the coupler, and a third through hole is formed in the generator shaft along the axis;
one end of the hollow pipe is fixedly connected with an input shaft of the gear box, and the other end of the hollow pipe penetrates through the first through hole, the second through hole and the third through hole and extends out of the generator shaft;
labyrinth seals includes seal receptacle, bearing, sealed lid and sealing washer, the seal receptacle is with the shell fixed connection of generator, the seal receptacle cover is located on the hollow tube and pass through the bearing with the hollow tube rotates to be connected, the inner circle of bearing with hollow tube fixed connection, the labyrinth groove has been seted up to the internal surface of seal receptacle, sealed lid with fixed connection can be dismantled to the seal receptacle, sealed lid cover is located on the hollow tube, the sealing washer set firmly in sealed cover just the cover is located on the hollow tube, the inner circle of sealing washer with the hollow tube rotates the butt.
The gearbox shell and the generator shell are detachably and fixedly connected, so that the gearbox and the generator are separated conveniently by disassembling, boss spigot positioning and pin hole positioning are arranged between the gearbox shell and the generator shell, the gearbox and the generator both use a rotation center as a reference to ensure the requirement of position degree, and ensure the concentricity of the gearbox output shaft and the generator shaft, so that the gearbox output shaft and the generator shaft are well aligned, and the gearbox output shaft and the generator shaft only bear pure torque for generating electricity without additional load which causes the reduction of the reliability of a transmission chain; the gear box is driven by a planetary gear train structure, and because the sun gear and the planetary gear are in floating engagement, the output shaft of the gear box is convenient for self-adaptation and the centering and positioning of the generator shaft, so that the adaptability to the deviation of the coaxiality is further improved; the hollow pipe is fixedly connected with an input shaft of the gear box and penetrates through the gear box and the generator, and when the generator is separated from the gear box, the hollow pipe is kept still, namely a cable in the hollow pipe is kept connected; adopt the bridge type that hollow tube both ends supported to support and set up labyrinth seal, effectively solve lubricating oil leakage problem, fixed connection can be dismantled with the seal receptacle to sealed lid, conveniently pulls down sealed lid and sealed, then just conveniently pulls down the bearing. The technical scheme has the advantages of compact structure, good centering and high transmission reliability, the generator and the gear box can be disassembled and maintained in the engine room, the gear box and the generator are not required to be integrally lowered to the tower for processing, the wind wheel is not required to be lowered to the tower, and the three most important aspects of the compactness of the structure, the transmission reliability and the good maintainability of the transmission chain are well balanced.
Furthermore, an oil discharge hole communicated with the labyrinth groove in the radial direction is formed in the labyrinth groove, and a plugging head is connected to the inner thread of the oil discharge hole in a threaded manner. The oil discharging hole and the blocking head are convenient for draining accumulated oil.
Further, the coupler adopts an insulation spline coupler, and the first teeth and the second teeth are spline teeth. The insulating function of the coupler prevents the support bearing of the gear box and the engaging tooth surface of the planetary gear train from being damaged by electric corrosion.
Furthermore, the integrated structure of the gear box and the generator of the wind generating set further comprises an oil nozzle, the oil nozzle is fixedly arranged on the gear box and faces the coupler, and lubricating oil is provided for the meshing of the first teeth and the second teeth through the oil nozzle. The lubricating oil enables the meshing abrasion of the first tooth and the second tooth to be small, and the service life of the first tooth and the second tooth is prolonged.
Furthermore, a radial oil throwing hole is formed in the coupler. The radial oil throwing hole is favorable for taking away metal particles, further reduces the abrasion of the first tooth and the second tooth, and improves the connection reliability.
Furthermore, a guide rail extending along the axial direction of the generator is connected to a foot of the generator. The generator can be controlled to move forwards or backwards along the guide rail, and the generator and the gearbox are separated in the cabin to be repaired, maintained and accurately reset.
Furthermore, a maintenance window is formed in the middle cavity part where the gear box is connected with the generator. In order to prevent the generator from pulling the tooth surface of the sun gear in the process of separating from the gear box, the sun gear needs to be positioned and guided by a tool, so that the sun gear is separated from contacting with the planet gear, and the maintenance window is used for feeding the tool into and taking the tool out of a middle cavity connected with the gear box and the generator and is also used for enabling workers to enter and exit the middle cavity connected with the gear box and the generator to install the tool.
A method for disassembling and assembling a tower of an integrated structure of a gear box and a generator of a wind generating set adopts the integrated structure of the gear box and the generator of the wind generating set, and comprises the following steps:
taking down the plugging head in the oil discharge hole, discharging the thin oil in the labyrinth groove from the oil discharge hole, and then installing the plugging head;
disassembling the sealing cover and the first sealing ring, and then disassembling the bearing;
opening a maintenance window, and feeding a tool for assisting in dismounting from the maintenance window, wherein the tool is a plurality of fan-shaped annular plates; the fan-shaped ring plates can be spliced into a disassembly auxiliary whole ring plate; an auxiliary support plate is arranged in the gear box, an auxiliary support hole is formed in the auxiliary support plate, the disassembly auxiliary whole ring plate is fixedly arranged in the auxiliary support hole, and the disassembly auxiliary whole ring plate is slidably sleeved on the output shaft of the gear box;
disconnecting the shell of the gear box from the shell of the generator;
dragging the generator along a guide rail on a bottom foot of the generator to a direction far away from the gear box, so that the generator is separated from the gear box, and simultaneously, a sun wheel of the planetary gear train is separated from a planetary wheel of the planetary gear train;
after maintenance is finished, the generator is pushed to the direction close to the gear box along the guide rail on the bottom foot of the generator, so that the sun wheel is meshed with the planet wheel, and boss spigot positioning and pin hole positioning between the shell of the gear box and the shell of the generator are aligned and pushed to the place;
connecting the shell of the gear box with the shell of the generator;
disassembling the auxiliary fan-shaped ring plate and taking out the auxiliary fan-shaped ring plate from the maintenance window;
closing the maintenance window;
mounting a bearing, and then mounting a sealing cover and a first sealing ring;
the disassembly and assembly of the integrated structure of the gear box and the generator of the wind generating set are completed through the steps.
Furthermore, dismantle supplementary whole circumferential surface of board and be equipped with protruding edge, be equipped with on the protruding edge and be the unthreaded hole that the even interval of circumference was arranged, be equipped with on the auxiliary supporting board with the threaded hole one-to-one of unthreaded hole, dismantle supplementary whole circumferential surface of board pass the unthreaded hole and threaded hole threaded connection through the screw, thereby with auxiliary supporting board fixed connection.
By adopting the technical scheme, compared with the prior art, the invention has the beneficial effects that:
1. the gear box shell is detachably and fixedly connected with the generator shell, so that the structure is compact; boss spigot positioning and pin hole positioning are arranged between the shell of the gear box and the shell of the generator, and centering is good; the planetary gear train structure is adopted for transmission, and the gear box output shaft connected with the sun gear is self-adaptively centered, so that the deviation adaptability of the coaxiality of the gear box output shaft and the generator shaft is further improved; when the generator is separated from the gear box, the hollow pipe is kept still, and the cable in the hollow pipe does not need to be detached; the labyrinth seal not only solves the problem of oil seal, but also is convenient to disassemble; the wind wheel transmission chain has the advantages of compact structure, good centering and high transmission reliability, the generator and the gear box can be disassembled and maintained in the engine room, the gear box and the generator are not required to be integrally lowered to the tower for processing, the wind wheel is not required to be lowered to the tower, and the transmission chain is well balanced in three most important aspects of compactness of structure, transmission reliability and good maintainability.
2. By adopting the insulating spline coupler, the supporting bearing of the gear box and the engaging tooth surface of the planetary gear train are prevented from being damaged by electric corrosion.
3. Through the oil nozzle and the oil throwing hole, the abrasion of the first tooth and the second tooth is reduced, the service life of the oil nozzle is prolonged, and the connection reliability of the oil nozzle is improved.
4. The guide rail is arranged on the bottom foot of the generator, so that the generator can move forwards or backwards along the guide rail, and the generator is convenient to disassemble and reset accurately.
5. A maintenance window is arranged on the middle cavity part of the gear box connected with the generator, so that the tool is convenient to feed in and take out, and a worker can conveniently enter and exit the middle cavity part of the gear box connected with the generator to install the tool.
6. The mechanism is compact and flexible, the transmission is reliable, and the applicability is strong.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings, which are required to be used in the embodiments, will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.
FIG. 1 is a front view of the structure of the present invention;
FIG. 2 is a view of the connection between the gear box housing and the generator housing according to the present invention;
FIG. 3 is an enlarged view A of FIG. 1;
FIG. 4 is an enlarged view B of FIG. 1;
fig. 5 is a structural view of a disassembly aid annular plate of the present invention.
Reference numerals:
1-a gear box, 11-a boss, 12-a pin shaft and 13-an auxiliary supporting plate;
2-generator, 21-spigot, 22-guide rail;
3-planetary gear train, 31-sun gear;
4-gearbox output shaft, 41-first tooth;
5-a coupler, 5 a-an oil slinger hole, 51-a second tooth, 52-a baffle plate, 53-an oil nozzle;
6-a generator shaft;
7-hollow pipe;
8-labyrinth seal, 81-seal seat, 81 a-labyrinth groove, 81 b-oil unloading hole, 82-bearing, 83-seal cover, 84-seal ring, 85-end face seal ring and 86-seal head;
9-maintenance window;
10-disassembly auxiliary whole ring plate, 10 a-unthreaded hole, 101-fan-shaped ring plate and 102-convex edge.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
Referring to fig. 1, in the integrated structure of the gear box and the generator of the wind turbine generator system provided by this embodiment, the gear box 1 and the generator 2 are both disposed in the nacelle, the housing of the gear box 1 and the housing of the generator 2 are detachably and fixedly connected, and boss spigot positioning and pin hole positioning are disposed between the housing of the gear box 1 and the housing of the generator 2. The integrated structure of the gear box and the generator of the wind generating set provided by the embodiment further comprises a planetary gear train 3, a gear box output shaft 4, a coupler 5, a generator shaft 6, a hollow pipe 7 and a labyrinth seal 8.
Specifically, please refer to fig. 2 together, the housing of the gear box 1 is detachably and fixedly connected with the housing of the generator 2 through bolts, an end surface of the housing of the gear box 1, which is close to the generator 2, is provided with an annular boss 11 based on a rotation center, an end surface of the housing of the generator 2, which is close to the gear box 1, is provided with a circular spigot 21 based on the rotation center, the boss 11 is in insertion fit with the spigot 21, so as to ensure that the output shaft 4 of the gear box is well aligned with the generator shaft 6, and the boss spigot positioning limits the axial and radial degrees of freedom between the output shaft 4 of the gear box and the generator shaft 6; holes are formed between the shell of the gear box 1 and the shell of the generator 2 by taking the rotation center as a reference, and a pin shaft 12 penetrates through the holes to position the circumferential direction between the gear box output shaft 4 and the generator shaft 6.
Referring to fig. 3, the planetary gear train 3 is disposed in the gear box 1, the planet carrier of the planetary gear train 3 is fixed in the gear box 1, and the planet gear of the planetary gear train 3 is rotatably disposed in the gear box 1.
One end of the output shaft 4 of the gear box is coaxially fixed with the sun gear 31 of the planetary gear train 3, the other end of the output shaft is provided with a first tooth 41, and the output shaft 4 of the gear box is provided with a first through hole along the axis. In this embodiment, the output shaft 4 of the gear box and the sun gear 31 are integrally formed. The first teeth 41 are external spline teeth.
The coupler 5 is provided with a second tooth 51, the coupler 5 is connected with the gear box output shaft 4 through the meshing coaxial key teeth of the first tooth 41 and the second tooth 51, and the coupler 5 is provided with a second through hole along the axis. In the present embodiment, the second teeth 51 are internally splined teeth. Specifically, to prevent the axial displacement of the first tooth 41 and the second tooth 51 from being separated, a baffle 52 is fixedly arranged on the end surface where the first tooth 41 and the second tooth 51 are engaged. As a further optimization scheme, the coupler 5 adopts an insulated spline coupler, and the insulation function of the coupler 5 prevents a support bearing of the gear box 1 and the engaging tooth surface of the planetary gear train 3 from being damaged by electric corrosion. In this embodiment, the sun gear 31, the first teeth 41 and the second teeth 51 on the coupling 5 are subjected to drum trimming to compensate for manufacturing and assembling errors and bearing deformation, so as to meet the floating requirement of the sun gear 31.
Of course, an oil nozzle 53 may be further provided, the oil nozzle 53 being fixedly arranged on the generator 2 and facing the coupling 5, and lubricating oil is supplied to the engagement of the first teeth 41 and the second teeth 51 through the oil nozzle 53. The lubricating oil makes the meshing wear of the first teeth 41 and the second teeth 51 small, and prolongs the service life of the teeth. As a further optimized scheme, the coupler 5 is provided with a radial oil throwing hole 5 a. The radial oil slinging holes 5a are beneficial to taking away metal particles, further reduce the abrasion of the first teeth 41 and the second teeth 51 and improve the connection reliability.
The generator shaft 6 is fixedly connected with the coupler 5, and a third through hole is formed in the generator shaft 6 along the axis. Specifically, the generator shaft 6 extends through the generator 2 and is fixedly connected to the stator inside the generator 2.
One end of the hollow pipe 7 is fixedly connected with the input shaft of the gear box 1, and the other end of the hollow pipe passes through the first through hole, the second through hole and the third through hole and extends out of the generator shaft 6. Specifically, one end of the hollow pipe 7 is fixedly connected with an input shaft of the gear box 1, the hollow pipe 7 penetrates through the gear box 1 and the generator 2, the hollow pipe 7 is used for providing a channel for a cable, the cable is a power cable and a signal cable of the offset system, and when the generator 2 is separated from the gear box 1, the hollow pipe 7 is kept still, namely the cable in the hollow pipe 7 is kept connected; the hollow tube 7 rotates along with the input shaft of the gear box 1, the cable in the hollow tube 7 rotates along with the hollow tube 7, the cable in the hollow tube 7 is connected with an external cable through a slip ring, and the hollow tube 7 and the output shaft 4 of the gear box rotate relatively.
Referring to fig. 4, the labyrinth seal 8 includes a sealing seat 81, a bearing 82, a sealing cover 83 and a sealing ring 84, the sealing seat 81 is fixedly connected to the housing of the generator 2, the sealing seat 81 is sleeved on the hollow tube 7 and rotatably connected to the hollow tube 7 through the bearing 82, an inner ring of the bearing 82 is fixedly connected to the hollow tube 7, the bearing 82 is fixed to the hollow tube through a lock nut and a locking washer, a labyrinth groove 81a is formed in an inner surface of the sealing seat 81, the labyrinth groove 81a is annular, the sealing cover 83 is detachably and fixedly connected to the sealing seat 81, the sealing cover 83 is sleeved on the hollow tube 7, the sealing ring 84 is fixedly disposed in the sealing cover 83 and sleeved on the hollow tube 7, and the inner ring of the sealing ring 84 is rotatably abutted to the hollow tube 7. Specifically, the labyrinth seal 8 further includes an end face seal ring 85, and the end face seal ring 85 is disposed on a connecting surface of the seal cover 83 and the seal seat 81. In this embodiment, a sealing groove is formed in the sealing end surface of the sealing seat 81, the end-face sealing ring 85 is disposed in the sealing groove, and the sealing end surface of the sealing cover 83 compresses the end-face sealing ring 85 and is attached to the sealing end surface of the sealing seat 81, so as to achieve the purpose of end-face sealing. As a further optimized scheme, an oil discharge hole 81b which is communicated with the labyrinth groove 81a in the radial direction is formed in the labyrinth groove 81a, the oil discharge hole 81b is formed in the bottom, and a blocking head 86 is connected to the oil discharge hole 81b in a threaded mode. The oil discharge hole 81b and the blocking head 86 facilitate the drainage of accumulated oil.
Of course, a guide rail 22 extending in the axial direction of the generator 2 may also be connected to the foot of the generator 2. The generator 2 can be controlled to advance or retreat along the guide rail 22 through the guide rail 22, and the generator 2 is separated from the gearbox 1 in the engine room for maintenance, maintenance and accurate resetting.
Referring to fig. 5, a maintenance window 9 is opened in the middle cavity portion where the gearbox 1 is connected to the generator 2. In order to prevent the tooth surface of the sun gear 31 from being scratched when the generator 2 is separated from the gearbox 1, the sun gear 31 needs to be positioned and guided by a tool, so that the sun gear 31 is separated from being in contact with the planet wheel, and the maintenance window 9 is used for feeding the tool into and taking the tool out of an intermediate cavity formed by connecting the gearbox 1 and the generator 2 and is also used for allowing a worker to enter and exit the intermediate cavity formed by connecting the gearbox 1 and the generator 2 to install the tool.
The invention also provides a method for disassembling and assembling the tower of the integrated structure of the gear box and the generator of the wind generating set, which comprises the following steps:
the blocking head 86 in the oil discharge hole 81b is taken down, the thin oil in the labyrinth groove 81a is discharged from the oil discharge hole 81b, and then the blocking head 86 is mounted;
specifically, the thin oil is discharged and collected in a concentrated manner so as to prevent the thin oil from dripping everywhere and polluting the environment when the generator 2 is moved out.
The seal cover 83 and the first seal ring 84 are removed, and then the bearing 82 is removed;
specifically, the bearing 82 and the hollow tube 7 are in small interference fit, the bearing 82 and the bearing 82 seat are in clearance fit, the locking nut and the locking gasket are firstly detached during detachment, and then the bearing 82 can be detached after the bearing 82 is heated by the induction heater.
Opening a maintenance window 9, and feeding a tool for assisting in dismounting from the maintenance window 9, wherein the tool is a plurality of fan-shaped annular plates 101; the fan-shaped ring plates 101 can be spliced into the disassembly auxiliary whole ring plate 10; an auxiliary support plate 13 is arranged in the gear box 1, an auxiliary support hole is formed in the auxiliary support plate 13, the disassembly auxiliary whole ring plate 10 is fixedly arranged in the auxiliary support hole, and the disassembly auxiliary whole ring plate 10 is slidably sleeved on the output shaft 4 of the gear box;
specifically, the circumferential surface of the disassembly assisting whole ring plate 10 is provided with a convex edge 102, the convex edge 102 is provided with unthreaded holes 10a which are circumferentially and uniformly arranged at intervals, the assisting support plate is provided with threaded holes which correspond to the unthreaded holes 10a one to one, and the disassembly assisting whole ring plate 10 penetrates through the unthreaded holes 10a through screws to be in threaded connection with the threaded holes, so that the disassembly assisting whole ring plate is fixedly connected with the assisting support plate. In this embodiment, there are two fan-shaped ring plates 101, and the two fan-shaped ring plates 101 can be spliced to form the disassembly-assisting whole ring plate 10. The maintenance window 9 is opened, the two fan-shaped ring plates 101 are fed from the maintenance window 9, the fan-shaped ring plates 101 are inserted into the auxiliary supporting holes, the unthreaded holes 10a are aligned with the threaded holes, and screws are screwed in, at the moment, the fan-shaped ring plates 101 support the output shaft 4 of the gearbox, so that gaps are reserved between the teeth of the sun wheel 31 and the teeth of the planet wheels, and the tooth surfaces of the sun wheel 31 and the planet wheels are prevented from being scratched by the generator 2 in the withdrawing process.
The connection between the shell of the gear box 1 and the shell of the generator 2 is disassembled;
specifically, the pin 12 is removed first, and then the bolt is removed.
Dragging the generator 2 along the guide rail 22 on the foot of the generator 2 in the direction far away from the gear box 1, so that the generator 2 is separated from the gear box 1, and simultaneously, the sun gear 31 of the planetary gear train 3 is separated from the planetary gears of the planetary gear train 3, and in the process, the disassembly auxiliary whole ring plate 10 is not disassembled;
specifically, when the generator 2 is dragged, the hollow pipe 7 is fixedly connected with the input shaft of the gear box 1, and the cable in the hollow pipe 7 is connected.
After maintenance is finished, the generator 2 is pushed to the direction close to the gear box 1 along the guide rails 22 on the feet of the generator 2, so that the sun wheel 31 is meshed with the planet wheels, and boss spigot positioning and pin hole positioning between the shell of the gear box 1 and the shell of the generator 2 are aligned and pushed to the position;
specifically, the pin 12 is first installed on the housing of the gear box 1, and then the spigot 21 on the housing of the generator 2 is pushed into the boss 11 of the gear box 1.
Connecting the housing of the gearbox 1 with the housing of the generator 2;
specifically, the bolted connection is installed and tightened in a diagonal tightening manner.
The auxiliary fan-shaped ring plate 101 is disassembled and taken out from the maintenance window 9;
specifically, the fixing bolts are detached first, and then the sector ring plate 101 is removed.
Closing the maintenance window 9;
mounting the bearing 82, and then mounting a sealing cover 83 and a first sealing ring 84;
specifically, after the bearing 82 is heated by the induction heater, the bearing 82 can be easily installed, and then the locking washer and the locking nut are installed.
The disassembly and assembly of the integrated structure of the gear box and the generator of the wind generating set are completed through the steps.
According to the integrated structure of the gear box and the generator of the wind generating set, the shell of the gear box 1 is detachably and fixedly connected with the shell of the generator 2, boss spigot positioning and pin hole positioning are arranged, the planetary gear train 3 is adopted for transmission, the hollow pipe 7 is fixedly connected with the input shaft of the gear box 1, and the labyrinth seal 8 is adopted, so that the structure is compact, the centering is good, the transmission reliability is extremely high, the generator 2 and the gear box 1 can be detached and maintained in the engine room, the integral tower descending treatment of the gear box 1 and the generator 2 is not needed, and the wind wheel does not need to descend the tower, so that the three most important aspects of the structure compactness, the transmission reliability and the good maintainability are well balanced; by adopting the insulating spline coupler 5, the supporting bearing of the gear box 1 and the engaging tooth surface of the planetary gear train 3 are prevented from being damaged by electric corrosion; through the oil nozzle 53 and the oil throwing hole 5a, the abrasion of the first tooth 41 and the second tooth 51 is reduced, the service life of the oil nozzle is prolonged, and the connection reliability of the oil nozzle is improved; the guide rail 22 is arranged on the bottom foot of the generator 2, so that the generator 2 can move forwards or backwards along the guide rail 22, and the generator 2 is convenient to disassemble and accurately reset; a maintenance window 9 is arranged at the middle cavity part of the gear box 1 connected with the generator 2, so that the tool is convenient to send in and take out, and a worker can conveniently enter and exit the middle cavity part of the gear box 1 connected with the generator 2 to install the tool; the integrated structure of the gear box and the generator of the wind generating set can realize the maintenance of the gear box 1 and the generator 2 in the engine room on the tower, thereby greatly reducing the maintenance cost, saving the maintenance time and improving the maintenance efficiency; the mechanism is compact and flexible, the transmission is reliable, and the applicability is strong.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims (9)

1. An integrated structure of a gear box and a generator of a wind generating set, the gear box and the generator are both arranged in a cabin, which is characterized in that,
the shell of the gear box is detachably and fixedly connected with the shell of the generator, and boss spigot positioning and pin hole positioning are arranged between the shell of the gear box and the shell of the generator;
the gear box is characterized by also comprising a planetary gear train, a gear box output shaft, a coupler, a generator shaft, a hollow pipe and labyrinth seals;
the planetary gear train is arranged in the gear box;
one end of the output shaft of the gear box is coaxially fixed with the sun gear of the planetary gear train, the other end of the output shaft of the gear box is provided with a first tooth, and the output shaft of the gear box is provided with a first through hole along the axis;
the coupler is provided with second teeth, the coupler is connected with the output shaft of the gear box through the meshed coaxial key teeth of the first teeth and the second teeth, and the coupler is provided with second through holes along the axis;
the generator shaft is fixedly connected with the coupler, and a third through hole is formed in the generator shaft along the axis;
one end of the hollow pipe is fixedly connected with an input shaft of the gear box, and the other end of the hollow pipe penetrates through the first through hole, the second through hole and the third through hole and extends out of the generator shaft;
labyrinth seals includes seal receptacle, bearing, sealed lid and sealing washer, the seal receptacle is with the shell fixed connection of generator, the seal receptacle cover is located on the hollow tube and pass through the bearing with the hollow tube rotates to be connected, the inner circle of bearing with hollow tube fixed connection, the labyrinth groove has been seted up to the internal surface of seal receptacle, sealed lid with fixed connection can be dismantled to the seal receptacle, sealed lid cover is located on the hollow tube, the sealing washer set firmly in sealed cover just the cover is located on the hollow tube, the inner circle of sealing washer with the hollow tube rotates the butt.
2. The integrated structure of the gear box and the generator of the wind generating set according to claim 1, wherein the labyrinth groove is provided with an oil discharge hole which is radially communicated with the labyrinth groove, and a plugging head is connected in the oil discharge hole in a threaded manner.
3. The integrated structure of the gearbox and the generator of the wind generating set according to claim 1, wherein the coupling is an insulated spline coupling, and the first tooth and the second tooth are spline teeth.
4. The integrated structure of the gearbox and the generator of the wind generating set according to claim 1, further comprising an oil nozzle, wherein the oil nozzle is fixedly arranged on the gearbox and faces the coupler, and lubricating oil is provided for the meshing of the first teeth and the second teeth through the oil nozzle.
5. The integrated structure of the gearbox and the generator of the wind generating set according to claim 4, wherein the coupling is provided with a radial oil slinging hole.
6. The integrated structure of the gearbox and the generator of the wind generating set according to claim 1, wherein the generator has a guide rail connected to a foot thereof, the guide rail extending along the axial direction of the generator.
7. The integrated structure of the gearbox and the generator of the wind generating set according to claim 1, wherein a maintenance window is formed in a middle cavity portion where the gearbox and the generator are connected.
8. A method for assembling and disassembling a gear box and a generator integrated structure of a wind generating set on a tower adopts the gear box and generator integrated structure of the wind generating set according to any one of claims 1 to 7, wherein an oil discharge hole which is radially communicated with the labyrinth groove is formed in the labyrinth groove, and a plugging head is connected in the oil discharge hole in a threaded manner; the bottom foot of the generator is connected with a guide rail extending along the axial direction of the generator; a maintenance window is arranged on the middle cavity part of the gear box connected with the generator; the method is characterized by comprising the following steps:
taking down the plugging head in the oil discharge hole, discharging the thin oil in the labyrinth groove from the oil discharge hole, and then installing the plugging head;
disassembling the sealing cover and the first sealing ring, and then disassembling the bearing;
opening a maintenance window, and feeding a tool for assisting in dismounting from the maintenance window, wherein the tool is a plurality of fan-shaped annular plates; the fan-shaped ring plates can be spliced into a disassembly auxiliary whole ring plate; an auxiliary support plate is arranged in the gear box, an auxiliary support hole is formed in the auxiliary support plate, the disassembly auxiliary whole ring plate is fixedly arranged in the auxiliary support hole, and the disassembly auxiliary whole ring plate is slidably sleeved on the output shaft of the gear box;
disconnecting the shell of the gear box from the shell of the generator;
dragging the generator along a guide rail on a bottom foot of the generator to a direction far away from the gear box, so that the generator is separated from the gear box, and simultaneously, a sun wheel of the planetary gear train is separated from a planetary wheel of the planetary gear train;
after maintenance is finished, the generator is pushed to the direction close to the gear box along the guide rail on the bottom foot of the generator, so that the sun wheel is meshed with the planet wheel, and boss spigot positioning and pin hole positioning between the shell of the gear box and the shell of the generator are aligned and pushed to the place;
connecting the shell of the gear box with the shell of the generator;
disassembling the auxiliary fan-shaped ring plate and taking out the auxiliary fan-shaped ring plate from the maintenance window;
closing the maintenance window;
mounting a bearing, and then mounting a sealing cover and a first sealing ring;
the disassembly and assembly of the integrated structure of the gear box and the generator of the wind generating set on the tower are completed through the steps.
9. The method for disassembling and assembling the tower of the integrated structure of the gearbox and the generator of the wind generating set according to claim 8, wherein the peripheral surface of the disassembly assisting integral ring plate is provided with a convex edge, the convex edge is provided with unthreaded holes which are circumferentially and uniformly arranged at intervals, the auxiliary support plate is provided with threaded holes which correspond to the unthreaded holes one by one, and the disassembly assisting integral ring plate passes through the unthreaded holes through screws to be in threaded connection with the threaded holes, so that the disassembly assisting integral ring plate is fixedly connected with the auxiliary support plate.
CN202010947998.1A 2020-09-10 2020-09-10 Integrated structure of gear box and generator of wind generating set and method for assembling and disassembling on tower Active CN112049760B (en)

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CN114654182A (en) * 2022-02-28 2022-06-24 明阳智慧能源集团股份公司 Method for replacing bearing tower of semi-direct-drive permanent magnet wind power generator

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