CN210068379U

CN210068379U - Wind power equipment with circumferential fixing structure

Info

Publication number: CN210068379U
Application number: CN201920470035.XU
Authority: CN
Inventors: 刘一峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-09
Filing date: 2019-04-09
Publication date: 2020-02-14
Anticipated expiration: 2029-04-09

Abstract

The utility model relates to a wind power equipment with circumference fixed knot constructs, including the pylon, the pylon top is installed at wind generating set, and wind generating set is associative with main shaft power including the impeller, and the main shaft then is associative with generator power, wherein is provided with the bearing at the front and back both ends of main shaft, and the bearing comprises inner circle, roller, holder and outer lane, and the inner circle inboard is provided with the circumference fixed knot structure who corresponds with the main shaft and makes both keep fixed, avoids appearing the phenomenon of race circle. The condition that the bearing is not hard up is avoided through the circumference of bearing is fixed to improve the durability of equipment, improve the economic benefits of enterprise.

Description

Wind power equipment with circumferential fixing structure

Technical Field

The utility model belongs to the technical field of wind power equipment, a wind power equipment with circumference fixed knot constructs is related to.

Background

Wind power equipment is in the state of not profitable always, the main problem lies in its installation, maintenance cost is too high, because wind power equipment is in the higher place installation of relief, holistic service environment is also comparatively poor, consequently can often lead to the bearing to appear not hard up scheduling problem because equipment low frequency torsional vibration, the bearing generally can adopt interference fit, red cover is fixed or high pressure is pushed in, but still can become flexible under the long-term low frequency torsional vibration, and the bearing replacement cost on the wind power equipment is very high, need use the loop wheel machine to lift by crane, it all need consume a large amount of manpower financial resources to lift by crane at every turn, the benefit that wind power equipment produced all has been put into installation and cost of maintenance in these years.

Another report also illustrates the current status of the wind power plant.

The source is as follows: wind energy committee Yaoxiaoqin

In recent years, the rolling bearings of wind generating sets at home and abroad are failed, and in 2016, a certain well-known wind generator manufacturer in Europe pays 6.2 hundred million Euros for the failure of the rolling bearings of the main shafts of a plurality of direct drive sets. According to statistics of penmen in the last two years, a plurality of domestic wind generating set manufacturers have failure of a plurality of main shaft rolling bearings of direct drive units; the double-fed machine set also has thousands of various rolling bearings or gear teeth failure. It was investigated shortly before that 20 foreign wind turbines of a certain brand name of wind farm in fujiangpu field were replaced by 6 speed-up gearboxes in 2015 to 2016, and the rest were replaced in 2017. And a certain 60-ten-thousand-watt wind power plant in Gua state is replaced with a speed-up gear box of 17 wind power units in the past. In 2017, in the first half of the year, a writer goes to a plurality of home to investigate the wind power plants, passes through Hebei Fengning, and investigates that the speed-up gear box on a wind turbine of a certain Fengning wind power plant has a fault. The above problems have been introduced when wind turbine technology is introduced on a large scale in the year, but we have not all digested and identified.

In the review of the text of planetary gear transmission failure research 12 years ago, 4500 wind power speed-up gear boxes supplied by a certain German wind power gear box manufacturer from 2001 to 2004 all over the world have faults, so that nine European wind power generator set manufacturers break production at that time, and hundreds of wind power generator sets in China are also involved (the speed-up gear boxes are replaced by the domestic C gear box manufacturer). According to the statistics of a certain well-known insurance company in europe at that time, the wind-power gearbox with 4500 faults is represented by 30% of bearings (about 1350), 39% of gear teeth (about 175), and 31% of shaft, pump, coupling, box body, sealing piece and the like. Since then, wind power gear box manufacturers and bearing manufacturers all make a great deal of improvement from the aspects of optimizing gear box or bearing structure design, manufacturing process, manufacturing precision, manufacturing materials, surface treatment, lubricating mode, lubricating materials, optimizing circumferential load of a rolling bearing, optimizing radial clearance of the rolling bearing, optimizing roller contact angle, optimizing waviness of the roller, optimizing roller modification of the rolling bearing, optimizing gear tooth modification, optimizing planetary transmission structure, optimizing load balancing coefficient, mounting process, test verification and the like.

The effective measures of the marine gearbox or other industrial gearboxes which are usually suitable for constant-speed operation can only be taken as temporary solution and cannot be taken as permanent solution when the marine gearbox or other industrial gearboxes are used on wind turbines or wind power gearboxes. The expected effect cannot be achieved, as long as the wind turbine runs for a certain period of time, the main rolling bearing of the wind turbine, the rolling bearing of the wind power gear box and the gear teeth break down as usual, and the failure frequency and the failure surface are continuously intensified. This gives rise to our thoughts | the occurrence of these faults can only be cured or reduced if the true cause of the fault is found.

The root of the method lies in the randomness, the fluctuation and the intermittence of the energy, namely wind, received by the wind turbine.

A wind turbine transmission shafting-main shaft-rolling bearing-gear-generator rotor system is a typical representative of frequent sudden change of working conditions of wind randomness, wind fluctuation and wind intermittence. Therefore, the system frequently undergoes transient processes such as starting, stopping, working condition change, rotating speed change, load change and the like when in operation.

Low-frequency torsional vibration as the primary cause of main drive chain failure

The first reason for various faults of the main drive chain components of the wind turbine is considered theoretically: low frequency torsional vibrations. One of the important reasons for e.g. running rings or gear teeth damage of rolling bearings is that the wind turbine design stage is unaware of the low frequency torsional vibrations of the main drive train of the wind turbine.

The wind generating set is a power machine using wind as an energy source, and has the problems of no low-frequency torsional vibration and serious low-frequency torsional vibration. Unfortunately, the concept has not been mentioned in foreign technical data introduced so far, and is not used in wind energy.

The problem is also found in 2011 by a certain foreign wind turbine manufacturing company, and the low-frequency torsional vibration of the main transmission shaft system of the wind turbine generator set is researched by the wind turbine generator manufacturing company, another company and a certain foreign known university. The theory conclusion of the wind turbine is drawn in 2012, and experiments and verifications are carried out on a prototype in 2013-2014, and a certain foreign wind turbine manufacturing company installs damping devices with different types, low frequencies and nonlinear torsional vibration on the newly manufactured models from 2015. This also confirms the pen holder's view.

In addition to torsional vibrations that may result from uneven power output of the power machine, torsional vibrations may also occur in work machines that do not uniformly absorb torque.

The low-frequency torsional vibration condition of the wind turbine is related to the condition that the time-varying property of wind causes uneven absorption and output power of a wind turbine impeller, and when the vibration characteristic of a system is not changed, the larger the fluctuation of the absorption and output power is, the larger the amplitude of the torsional vibration is.

In all industrial machines, accidents due to torsional vibrations have occurred.

If the system has low-frequency torsional vibration, the wind turbine transmission shaft system generates low-frequency torsional vibration stress caused by the low-frequency torsional vibration, the stress is the additional stress of the low-frequency torsional vibration except the stress which is born by the wind turbine device, so that the load of the main transmission chain part of the wind turbine is increased, and when the stress exceeds the allowable limit, the main transmission chain part of the wind turbine shaft system generates fatigue damage.

When the shafting of the wind turbine generates low-frequency torsional vibration, the following phenomena occur:

1. torsional fatigue fracture of a shafting main shaft occurs;

2. connecting parts in the shaft system, such as connecting bolts of the shaft system and the like, are damaged so as to break;

3. various accessories in a shaft system, such as connecting shafts of an oil pump and the like, generate multiple torsional fatigue fracture;

4. the connection threaded fasteners of the hub and the main shaft of the impeller are worn, worn or broken;

5. local shaft in the shaft system is overheated;

6. the gear teeth are broken due to the disconnection-impact of a transmission gear of the speed-up gear box or the pitting corrosion and noise of a gear transmission part;

7. causing the separation of the rolling bearing rollers and the balls from the retainer and the impact to damage the rolling bearing rollers and the balls;

8. various interference fit or shrinkage fit parts in the shaft system are seriously loosened.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above shortcoming of prior art, the utility model provides a wind power equipment with circumference fixed knot constructs, its circumference through the bearing is fixed avoids the not hard up condition of bearing to improve equipment's durability, the economic benefits who improves the enterprise.

The utility model provides a technical scheme that its technical problem adopted is: a wind power device with a circumferential fixing structure comprises a tower frame, wherein the top of the tower frame is arranged on a wind power generator set, the wind power generator set comprises an impeller, the impeller is connected with power of a main shaft, the main shaft is connected with power of a generator, bearings are arranged at the front end and the rear end of the main shaft, each bearing comprises an inner ring, a roller, a retainer and an outer ring, the outer ring of each bearing is matched with a bearing chamber, the inner ring of each bearing is matched with the main shaft, and at least one circumferential fixing structure is arranged between the inner ring of each bearing and the main shaft or between the outer ring of each bearing and the.

Furthermore, the outer ring is provided with a circumferential fixing structure corresponding to the bearing chamber, so that the outer ring and the bearing chamber are connected to avoid rotation, and the phenomenon of outer ring running is avoided.

Furthermore, a circumferential fixing structure is arranged between the inner ring and the main shaft, so that the inner ring and the main shaft are connected to avoid rotation, and the phenomenon of inner ring running is avoided.

Furthermore, the first implementation manner of the circumferential fixing structure is that at least one of the inner ring and the outer ring of the bearing is circumferentially provided with a convex key or a groove, the main shaft and the bearing chamber are correspondingly provided with a groove or a convex key, the convex key and the groove are matched so as to enable the inner ring and the main shaft to be relatively fastened, and the outer ring and the bearing chamber to be relatively fastened.

Furthermore, at least one pair of the convex key and the groove is arranged; the key and the groove can be any shape matching each other.

Furthermore, another mode of the circumferential fixing structure is that concave positions are respectively arranged at the positions, corresponding to the main shaft and/or the bearing outer ring, of the bearing inner ring and/or the bearing outer ring, and a fixed object is placed between the two concave positions and is used for clamping the two concave positions so as to realize circumferential fixing.

Furthermore, a third implementation manner of the circumferential fixing structure is to form holes at corresponding positions of the inner ring and the main shaft, and the outer ring and the bearing chamber and to provide pins penetrating through the two holes, and the two corresponding holes are connected by the pins to avoid relative rotation.

Further, according to the difference of wind power equipment, a gearbox can be optionally arranged between the main shaft and the generator.

Furthermore, transmission shafts are arranged in the gear box, bearings are arranged on the transmission shafts, and circumferential fixing structures are correspondingly arranged on at least one group of the bearing outer ring and the bearing chamber and the bearing inner ring and the transmission shafts, so that the bearing outer ring and the bearing chamber and the bearing inner ring and the transmission shafts are kept connected to avoid relative rotation.

The utility model has the advantages that: through bearing inner race or outer lane respectively through circumference fixed knot construct realize fixed, avoid the bearing to appear race, not hard up scheduling problem, improve the life of bearing, finally reach extension wind power equipment life, have convenient to use, improve economic benefits, increase characteristics such as wind power equipment durability.

Drawings

FIG. 1 is a schematic structural diagram of a wind power plant;

FIG. 2 is a schematic view of a structure with an inner ring circumferentially fixed between a main shaft and a bearing inner ring;

FIG. 3 shows a bearing outer race and a bearing chamberBetweenThe structure is provided with an outer ring circumferential fixing structure schematic diagram;

FIG. 4 is a schematic view of a structure with circumferential fixing of the inner and outer races between the main shaft and the inner race and between the outer race and the bearing chamber;

FIG. 5 is a schematic view of a gearbox configuration;

FIG. 6 is an enlarged view B of FIG. 5 showing a circumferential fixing structure between the transmission shaft and the bearing inner race;

FIG. 7 is a schematic view of another embodiment of FIG. 6 with a circumferential securing arrangement between the bearing cup and the bearing chamber;

FIG. 8 is a schematic view of another alternative embodiment of FIG. 6 with circumferential fixing structures between the shaft and the inner race and between the outer race and the bearing chamber;

fig. 9 is an enlarged view of a in fig. 5.

In the figure: 1-tower, 2-impeller, 3-main shaft, 4-generator, 5-bearing, 6-inner ring, 7-outer ring, 8-circumferential fixed structure, 9-gear box, 10-transmission shaft and 11-bearing chamber.

Detailed Description

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are based on the orientations and positional relationships illustrated in the drawings and are used merely for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention unless otherwise specified.

The present invention will be further explained with reference to the drawings and examples.

Referring to the schematic diagram, the wind power equipment with the circumferential fixing structure 8 comprises a tower frame 1, wherein the top of the tower frame 1 is installed on a wind power generator 4 group, the wind power generator 4 group comprises an impeller 2, the impeller 2 is in power connection with a main shaft 3, the main shaft 3 is in power connection with the generator 4, bearings 5 are arranged at the front end and the rear end of the main shaft 3, each bearing 5 comprises an inner ring 6, a roller and an outer ring 7, the circumferential fixing structure 8 corresponding to the main shaft 3 is arranged on the inner side of each inner ring 6, so that the inner rings and the outer rings are fixed, and the phenomenon of ring runout.

Besides the circumferential fixation of the inner ring 6 and the main shaft 3, a circumferential fixation structure 8 is correspondingly arranged between the outer ring 7 and the outer bearing chamber 11 to keep the outer ring 7 and the outer bearing chamber 11 fixed, or the inner ring 7 and the outer ring 7 are respectively fixed in the circumferential direction, so that the phenomenon of ring runout is avoided.

The first implementation manner of the circumferential fixing structure 8 is that a convex key or a groove is circumferentially arranged on at least one of the inner ring 6 and the outer ring 7 of the bearing 5, a groove or a convex key is correspondingly arranged on the main shaft 3 and the bearing chamber 11, the inner ring 6 and the main shaft 3 are kept relatively fastened by matching the convex key and the groove, and the outer ring 7 and the bearing chamber 11 are kept relatively fastened.

At least one pair of the convex key and the groove is arranged; the key and the groove can be any shape matching each other.

The other mode of the circumferential fixing structure 8 is that concave positions are respectively arranged at the positions corresponding to the inner ring 6 of the bearing 5 and the corresponding main shaft 3 and/or the outer ring 7 of the bearing 5 and the bearing chamber 11, a fixed object is placed between the two concave positions, and the two concave positions are clamped by the fixed object so as to realize circumferential fixing.

The third implementation manner of the circumferential fixing structure 8 is to open holes at the corresponding positions of the inner ring 6 and the main shaft 3, and the outer ring 7 and the bearing chamber 11 and to provide pins penetrating into the two holes, and the two corresponding holes are connected by the pins to avoid relative rotation.

Depending on the differences in the wind power plant, a gearbox 9 may optionally be provided between the main shaft 3 and the generator 4.

The gearbox is characterized in that transmission shafts 10 are arranged in the gearbox 9, bearings 5 are arranged on the transmission shafts 10, bearing chambers 11 are arranged outside the bearings 5, and circumferential fixing structures 8 are respectively arranged between the bearings 5 and the transmission shafts 10 and between the bearings 5 and the bearing chambers 11, so that the inner rings 6 of the bearings 5 and the transmission shafts 10 are prevented from rotating relatively, and the outer rings 7 and the bearing chambers 11 are fastened to prevent rotating relatively.

Example 1

Referring to fig. 2-4, a (direct drive type) gearless box wind power equipment comprises a main shaft 3, wherein a bearing 5 is arranged on the main shaft 3, an outer ring 7 of the bearing 5 is circumferentially fixed with a bearing chamber, an inner ring 6 of the bearing 5 is circumferentially fixed with the main shaft 3, at least one of the outer ring 7 and the inner ring 6 is circumferentially fixed, and therefore the phenomenon that the bearing 5 runs due to vibration is avoided.

Example 2

Referring to fig. 5-8, a wind power plant with a gear box 9 comprises the gear box 9, a transmission shaft 10 and a bearing 5 in the gear box 9, and a circumferential fixing structure 8 is arranged between the bearing 5 and a bearing chamber 11 outside the bearing 5.

Example 3

Referring to fig. 5-8, a wind power plant with a gear box 9 comprises the gear box 9, two transmission shafts 10 and a bearing 5 in the gear box 9, and at least one circumferential fixing structure 8 is arranged between the bearing 5 and a bearing chamber 11 outside the bearing 5.

Example 4

Referring to fig. 5-8, a wind power plant with a gear box 9 comprises the gear box 9, three transmission shafts 10 and a bearing 5 in the gear box 9, and a circumferential fixing structure 8 is arranged between the bearing 5 and a bearing chamber 11 outside the bearing 5.

Example 5

Referring to fig. 5-8, a wind power plant with a gear box 9 comprises the gear box 9, four transmission shafts 10 and bearings 5 in the gear box 9, and a circumferential fixing structure 8 is arranged between at least one of the bearings 5 and a bearing chamber 11 outside the bearing 5.

Example 6

Referring to the schematic diagram, the wind power equipment with the gear box 9 comprises the gear box 9, wherein a transmission shaft 10 in the gear box 9 is provided with a circumferential fixing structure 8, and the circumferential fixing structure 8 is arranged between the transmission shaft 10 and an inner ring 6 of a bearing 5, so that the transmission shaft 10 and the inner ring 6 of the bearing 5 are tightly fixed.

Example 7

Referring to the schematic diagram, the wind power equipment with the gear box 9 comprises the gear box 9, a transmission shaft 10 is arranged in the gear box 9, a bearing 5 is arranged on the transmission shaft 10, and a circumferential fixing structure 8 is arranged between an outer ring 7 of the bearing 5 and a bearing chamber 11 outside the bearing 5, so that the bearing 5 and the bearing chamber 11 are tightly fixed.

Example 8

Referring to fig. 2 to 8, a wind power plant with a gear box 9 comprises a main shaft 3 and the gear box 9, wherein a circumferential fixing structure 8 is arranged on the main shaft 3 and the gear box 9, the circumferential fixing structure 8 is a correspondingly arranged convex key or groove, and the convex key or groove is respectively arranged on a shaft and a bearing 5, and the bearing 5 and a bearing chamber 11.

Example 9

Referring to fig. 9, a wind power plant with a gear box 9 includes a main shaft 3 and a gear box 9, a circumferential fixing structure 8 is provided on the main shaft 3 and the gear box 9, the circumferential fixing structure 8 is a pin and an opening, openings are provided at any corresponding positions of a shaft and a bearing 5, the bearing 5 and a bearing chamber 11, the corresponding shaft and the bearing 5 are inserted by a pin, and the bearing 5 and the bearing chamber 11 are tightly fixed.

The present invention is not limited to the above-described embodiments, and various modifications and variations of the present invention are intended to be included within the scope of the claims and the equivalent technology of the present invention if they do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a wind power equipment with circumference fixed knot constructs which characterized in that: the wind power generator comprises a tower frame, wherein the top of the tower frame is arranged on a wind power generator set, the wind power generator set comprises an impeller, the impeller is in power connection with a main shaft, the main shaft is in power connection with a generator, bearings are arranged at the front end and the rear end of the main shaft, each bearing comprises an inner ring, a roller, a retainer and an outer ring, the outer ring of each bearing is matched with a bearing chamber, the inner ring of each bearing is matched with the main shaft, and at least one circumferential fixing structure is arranged between the inner ring of each bearing and the main shaft or between the outer ring.

2. The wind power plant with a circumferential fixing structure as set forth in claim 1, wherein: the outer ring is provided with a circumferential fixing structure corresponding to the bearing chamber, so that the outer ring and the bearing chamber are connected to avoid rotation, and the phenomenon of outer ring running is avoided.

3. The wind power plant with a circumferential fixing structure as set forth in claim 1, wherein: a circumferential fixing structure is arranged between the inner ring and the main shaft, so that the inner ring and the main shaft are connected to avoid rotation, and the phenomenon of inner ring running is avoided.

4. A wind power plant with a circumferential fixing structure according to claim 2 or 3, characterized in that: the first implementation manner of the circumferential fixing structure is that at least one of the inner ring and the outer ring of the bearing is circumferentially provided with a convex key or a groove, the main shaft and the bearing chamber are correspondingly provided with a groove or a convex key, the convex key and the groove are matched so that the inner ring and the main shaft are kept relatively fastened, and the outer ring and the bearing chamber are kept relatively fastened.

5. Wind power installation with a circumferential fixing structure according to claim 4, characterised in that: at least one pair of the convex key and the groove is arranged; the key and the groove can be any shape matching each other.

6. A wind power plant with a circumferential fixing structure according to claim 2 or 3, characterized in that: the other mode of the circumferential fixing structure is that concave positions are respectively arranged at the positions, corresponding to the main shaft and/or the bearing outer ring, of the bearing inner ring and/or the bearing outer ring, corresponding to the bearing chamber, fixed objects are placed between the two concave positions, and the two concave positions are clamped by the fixed objects so as to realize circumferential fixing.

7. A wind power plant with a circumferential fixing structure according to claim 2 or 3, characterized in that: the third realization mode of the circumferential fixing structure is to open holes at the corresponding positions of the inner ring and the main shaft as well as the outer ring and the bearing chamber and to be provided with pins penetrating in the two open holes, and the two corresponding open holes are connected by the pins to avoid relative rotation.

8. The wind power plant with a circumferential fixing structure as set forth in claim 1, wherein: according to the difference of wind power equipment, a gearbox can be optionally arranged between the main shaft and the generator.

9. The wind power plant with a circumferential fixing structure as set forth in claim 8, wherein: the transmission shaft is arranged in the gear box, the bearings are arranged on the transmission shafts, and the circumferential fixing structures are correspondingly arranged on at least one group of the bearing outer ring and the bearing chamber and the bearing inner ring and the transmission shaft, so that the bearing outer ring and the bearing chamber and the bearing inner ring and the transmission shaft are kept connected, and relative rotation is avoided.