CN210509989U - Wind power main shaft system with permanent magnetic suspension bearing - Google Patents
Wind power main shaft system with permanent magnetic suspension bearing Download PDFInfo
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- CN210509989U CN210509989U CN201921190032.7U CN201921190032U CN210509989U CN 210509989 U CN210509989 U CN 210509989U CN 201921190032 U CN201921190032 U CN 201921190032U CN 210509989 U CN210509989 U CN 210509989U
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Abstract
The utility model relates to a wind-powered electricity generation main shaft system with permanent magnetism suspension bearing, including the fan main shaft, main shaft bearing, its characterized in that, this system still includes permanent magnetism suspension bearing, permanent magnetism suspension bearing sets up the periphery at the fan main shaft. The system improves the problems that the whole shaft system slightly moves due to the fact that the axial force transmitted by wind power is transmitted to the main shaft bearing by means of the magnetic force of the permanent magnetic suspension bearing, the reliability of the bearing is reduced, the design life cannot be prolonged, the main shaft system is damaged, and the like.
Description
Technical Field
The utility model relates to a wind-powered electricity generation main shaft field, especially a wind-powered electricity generation main shaft system with permanent magnetism suspension bearing.
Background
At present, wind turbine generators at home and abroad mainly develop two mainstream forms of a horizontal shaft type fan and a vertical shaft type fan, and a horizontal shaft type wind driven generator is mainly adopted at home. Wind turbine generators work in the field all the year round, and have severe working conditions, large temperature and humidity changes and complex loading conditions, so that wind turbine bearings are required to have good impact resistance, sealing and lubricating properties, long service life and high reliability. The wind power bearing is an important supporting component of the wind turbine generator and plays an important role in the service life, performance and reliability of the whole generator. The bearing of the wind generating set mainly comprises a transmission system bearing, a yaw system bearing and a pitch system bearing, wherein the transmission system bearing comprises a main shaft bearing, a generator bearing and a gearbox bearing.
The special bearing for the wind turbine generator is used as an important component in the wind turbine generator, and the main shaft bearing has non-variable functions. Besides precision and sealing, factors influencing the service life of the main shaft bearing also are main failure modes of pitting corrosion and abrasion of the inner ring and the outer ring of the bearing. The bearing is a moving connecting piece and a load supporting piece in machinery, changes sliding friction between a fixed body and a movable body which rotate mutually into rolling friction, has small friction loss and is a precise mechanical element.
The gearbox input shaft acts as a floating end bearing for a two point support design, with the shaft offset being a determining factor in the choice of bearing type. The self-aligning roller bearing has two rows of rollers, and the bearing can bear large radial load force and also can bear heavy load and impact load. And because of the self-aligning performance, the bearing can bear axial loads in two directions to some extent. The outer ring raceway of the self-aligning roller bearing is spherical, so that the self-aligning roller bearing has good self-aligning performance and can compensate the coaxiality error. The drum-shaped roller of the self-aligning roller bearing is arranged between the inner ring with two raceways and the spherical outer ring raceway. The curvature center of the outer ring raceway surface is coincident with the bearing center, so that the self-aligning ball bearing has the same self-aligning function as the self-aligning ball bearing. The shaft can be automatically adjusted when the shaft is bent, and the bearing load is not increased. It is also more important to ensure the correct distance between the fixed end bearing position and the floating end bearing position when installed. However, most of the bearing damage in this configuration is due to reduced reliability of the bearing due to excessive axial force being transmitted to the bearing, thereby damaging the operation of the main shaft system and causing the fan to stop.
SUMMERY OF THE UTILITY MODEL
The invention of the utility model aims to: aiming at the defects in the prior art, the wind power main shaft system applying the permanent magnetic suspension bearing is provided to solve the problem that the reliability of the main shaft bearing is reduced and the main shaft system is damaged due to the fact that the whole shaft system slightly moves because the axial force transmitted by wind power is transmitted to the main shaft bearing.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a wind-powered electricity generation main shaft system with permanent magnetism suspension bearing, including fan main shaft, main shaft bearing, its characterized in that, this system still include permanent magnetism suspension bearing, and this permanent magnetism suspension bearing increases on the characteristics basis that does not change current main shaft and rack construction. The permanent magnetic suspension bearing is arranged on the periphery of the fan main shaft.
Preferably, a plurality of permanent magnetic suspension bearings connected in parallel can be arranged on the periphery of the main shaft of the fan, namely
And a plurality of groups of permanent magnetic suspension bearings are used in parallel.
The permanent magnetic suspension bearing comprises a permanent magnetic suspension bearing outer ring, a permanent magnet of the permanent magnetic suspension bearing and a permanent magnetic suspension bearing inner ring.
Preferably, a shaft sleeve is arranged between the permanent magnetic suspension bearing and the fan main shaft, the shaft sleeve is fixed on the wind power main shaft, the shaft sleeve is made of magnetic materials or magnetic induction materials, a gap is kept between the lower surface of the permanent magnetic suspension bearing and the upper surface of the shaft sleeve, and the permanent magnetic suspension bearing and the shaft sleeve generate magnetic attraction.
Preferably, the permanent magnet is formed by axially combining a plurality of permanent magnet rings, and a reluctance slot is arranged between every two adjacent permanent magnet shape pieces.
The permanent magnet is a 90-degree annular neodymium iron (boron) permanent magnet.
Based on adopt above-mentioned technical scheme, the beneficial effects of the utility model are that: by means of the magnetic force mode of the permanent magnetic suspension bearing, the problems that the whole shaft system slightly moves due to the fact that the axial force transmitted by wind power is transmitted to the main shaft bearing, the reliability of the bearing is reduced, the design life cannot be prolonged, the main shaft system is damaged, and the like are solved.
Drawings
Fig. 1 is a schematic structural diagram of a wind power main shaft system with a permanent magnetic suspension bearing according to the present invention;
fig. 2 is a schematic structural diagram of the permanent magnetic suspension bearing of the present invention;
FIG. 3 is a schematic sectional view of the permanent magnet of the present invention in the A direction;
FIG. 4 is a view showing the direction A of the permanent magnet of the present invention
In the figure, 1-a fan main shaft, 2-a first main shaft baffle cover, 3-a main shaft outer sleeve, 4-a main shaft bearing, 5-a second main shaft baffle cover, 6-a first magnetic suspension bearing baffle cover, 8-a second magnetic suspension bearing baffle cover, 9-a coupler,
7-permanent magnetic suspension bearing, 71-permanent magnetic suspension bearing outer ring, 72-permanent magnetic suspension bearing permanent magnet,
73-permanent magnetic suspension bearing inner race
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Referring to fig. 1, the utility model provides a pair of wind-powered electricity generation main shaft system with permanent magnetism suspension bearing, including fan main shaft 1, the middle part of fan main shaft 1 is provided with main shaft bearing 4, and main shaft bearing 4 is located first main shaft and keeps off between lid 2 and the second main shaft fender lid 5, and the outside is equipped with main shaft overcoat 3. The system also comprises a permanent magnetic suspension bearing 7, wherein the permanent magnetic suspension bearing 7 is arranged on the periphery of the fan main shaft on the basis of not changing the characteristics of the existing main shaft 1 and the frame structure. In this embodiment, four groups of permanent magnetic suspension bearings 7 are arranged and used in parallel.
In the wind power main shaft system with the permanent magnetic suspension bearing of the present embodiment, a shaft sleeve (not shown in the figure) is disposed between the permanent magnetic suspension bearing 7 and the fan main shaft 1, the shaft sleeve is fixed on the fan main shaft 1, the shaft sleeve is made of a magnetic material or a magnetic induction material, and a gap is maintained between the lower surface of the permanent magnetic suspension bearing 7 and the upper surface of the shaft sleeve.
Referring to fig. 2, in the wind power main shaft system with the permanent magnetic suspension bearing, the permanent magnetic suspension bearing 7 includes an outer permanent magnetic suspension bearing ring 71, a permanent magnetic suspension bearing permanent magnet 72 and an inner permanent magnetic suspension bearing ring 72.
Referring to fig. 3 and 4, the permanent magnet 72 is formed by axially combining a plurality of permanent magnet rings, and a reluctance slot is arranged between two adjacent permanent magnet ring pieces. In this embodiment, the permanent magnet 72 is a 90 ° ring-shaped neodymium iron (boron) permanent magnet.
The permanent magnetic suspension shaft suspends the rotor in the air by utilizing the magnetic force action, so that the rotor is not in mechanical contact with the stator. The principle is that the magnetic induction lines are vertical to the magnetic suspension lines, the shaft core is parallel to the magnetic suspension lines, so that the weight of the rotor is fixed on a running track, and the shaft core almost without load is propped against the direction of the magnetic suspension lines to form that the whole rotor is suspended in the air and is on the fixed running track.
In this embodiment, the stator is connected to the fan spindle 1, and the rotor is connected to the shaft housing or to a dedicated shaft sleeve.
When the main shaft 1 is running, the force of wind and the force borne by the whole fan system are transmitted to the main shaft bearing 4, and the force borne is decomposed, so that the axial force borne by the main shaft bearing 4 is too large, and the whole main shaft system slightly moves. When the shafting system moves, due to the existence of the permanent magnetic suspension bearing 7, the rotor of the magnetic suspension bearing 7 rotates along with the main shaft system when the shafting rotates, and the magnetic suspension bearing plays a role, such as a thrust role played by the magnetic suspension bearing in the main shaft system.
When the magnetic suspension bearing 7 works, the magnetic suspension bearing is adopted, so the magnetic suspension bearing has the characteristics of small mechanical wear, low energy consumption, small noise, long service life, no need of lubrication, no oil pollution and the like. When the shafting moves, the shafting shifts because of the magnetic suspension bearing, so that the generated shift shafting generates a magnetic force for preventing the shafting from moving under the action of the magnetic suspension bearing, and when the magnetic force of the magnetic suspension bearing 7 is enough and the position is proper, the thrust action can be generated on the main shaft shafting. And because of the thrust action generated by the magnetic suspension bearing, the stress of the main shaft bearing 4 is uniform, so that the service life of the main shaft bearing 4 can be prolonged greatly, and the operation of the whole fan system is facilitated.
Through the calculation of the main shaft data, various forces borne by the main shaft bearing 4 in the whole when the wind power is the maximum can be obtained, and then the borne forces are decomposed into the directions of axial force, radial force and the like, so that the position of the magnetic suspension bearing 7 in a main shaft system and the force which the magnetic suspension bearing 7 should bear are deduced.
According to the above conclusion, it is known that when the magnetic force of a group of permanent magnetic bearings, the various forces on the shafting and the stress positions of the various forces on the shafting are adopted, when the three groups of magnetic suspension bearings 7 are selected for parallel use, the magnetic force generated by the magnetic suspension bearings when the three groups of magnetic suspension bearings are selected can be obtained, the magnitude and the direction of the various forces acting on the main shaft by the whole system can be obtained by decomposing the force on the wind power main shaft, the moment generated by the axial force when the wind power main shaft moves can be calculated by taking the center of the system as a starting point, in order to stop the wind power main shaft moving, the moment generated by the magnetic suspension bearings is not less than the moment generated when the wind power main shaft moves, the directions are opposite, and therefore the optimal position from the fan main shaft bearing 4 when the three groups. When the calculated result exceeds the effective length of the main shaft of the fan, the number of the magnetic bearings 7 connected in parallel can be increased appropriately so as to meet the requirement of the fan. In the embodiment, four groups of magnetic suspension bearings are selected to be connected in parallel for use, so that the thrust action of the wind power main shaft can be met, and meanwhile, the use position of the permanent magnetic suspension bearing 7 is also calculated.
To sum up, the utility model provides a permanent magnetism suspension bearing's application design's in wind-powered electricity generation main shaft simple structure, light in weight easily installs, has the characteristics that do not change current main shaft and rack construction.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The wind power main shaft system with the permanent magnetic suspension bearing comprises a fan main shaft (1) and a main shaft bearing (4), and is characterized by further comprising a permanent magnetic suspension bearing (7) arranged on the periphery of the fan main shaft (1).
2. Wind power spindle system with permanent magnetic suspension bearings according to claim 1, characterized in that a number of parallel permanent magnetic suspension bearings (7) are arranged on the outer circumference of the fan spindle (1).
3. The wind power main shaft system with the permanent magnetic suspension bearing is characterized in that a shaft sleeve is arranged between the permanent magnetic suspension bearing (7) and the fan main shaft (1), the shaft sleeve is fixed on the fan main shaft (1), the shaft sleeve is made of a magnetic material or a magnetic induction material, and a gap is kept between the lower surface of the permanent magnetic suspension bearing (7) and the upper surface of the shaft sleeve.
4. Wind power spindle system with permanent magnet suspension bearing according to claim 1, characterized in that the permanent magnet suspension bearing (7) comprises an outer ring (71), permanent magnets (72) and an inner ring (73).
5. The wind power main shaft system with the permanent magnetic suspension bearing according to claim 4, characterized in that the permanent magnet (72) is formed by axially combining a plurality of permanent magnet rings, and a reluctance slot is arranged between two adjacent permanent magnet ring-shaped sheets.
6. Wind power spindle system with permanent magnet magnetic suspension bearing according to claim 4, characterized in that the permanent magnet (72) is a 90 ° ring neodymium iron boron permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921190032.7U CN210509989U (en) | 2019-07-26 | 2019-07-26 | Wind power main shaft system with permanent magnetic suspension bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921190032.7U CN210509989U (en) | 2019-07-26 | 2019-07-26 | Wind power main shaft system with permanent magnetic suspension bearing |
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| Publication Number | Publication Date |
|---|---|
| CN210509989U true CN210509989U (en) | 2020-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921190032.7U Active CN210509989U (en) | 2019-07-26 | 2019-07-26 | Wind power main shaft system with permanent magnetic suspension bearing |
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| CN (1) | CN210509989U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458694A (en) * | 2022-02-14 | 2022-05-10 | 迈格钠磁动力股份有限公司 | Main shaft system for wind power generation |
-
2019
- 2019-07-26 CN CN201921190032.7U patent/CN210509989U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114458694A (en) * | 2022-02-14 | 2022-05-10 | 迈格钠磁动力股份有限公司 | Main shaft system for wind power generation |
| CN114458694B (en) * | 2022-02-14 | 2022-10-11 | 迈格钠磁动力股份有限公司 | Main shaft system for wind power generation |
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