CN216588935U - Structure for increasing braking torque of fan blade - Google Patents
Structure for increasing braking torque of fan blade Download PDFInfo
- Publication number
- CN216588935U CN216588935U CN202123301669.9U CN202123301669U CN216588935U CN 216588935 U CN216588935 U CN 216588935U CN 202123301669 U CN202123301669 U CN 202123301669U CN 216588935 U CN216588935 U CN 216588935U
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- fan
- brake
- gear
- motor
- band
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Control Of Positive-Displacement Air Blowers (AREA)
- Wind Motors (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses a structure for increasing fan paddle braking moment of torsion all has the bearing gear at every paddle root of fan, and this bearing gear becomes the drive gear drive of the oar motor that corresponds with it specially in the oar system by the fan, and its improvement part lies in: and a brake gear meshed with the fan blade bearing gear is also arranged, and an independent band-type brake is arranged for the brake gear. The structure disclosed by the utility model can avoid the brake torque limitation caused by the motor installation size limitation of the band-type brake, and expand the output range of the brake torque of the paddle band-type brake; after the independent band-type brake is adopted, the size of the motor is reduced, the convenience of mechanical layout in the fan hub is improved, the space requirement of the hub is reduced, and the cost of the hub is reduced conveniently.
Description
Technical Field
The utility model relates to an electronic pitch system field that becomes of aerogenerator, specific structure for increasing fan paddle braking moment of torsion in specific saying so relates to this field.
Background
For a long time, a pitch control system of a wind turbine (abbreviated as a fan) is rotated by a driving gear connected to a motor when operating, and as shown in fig. 1, the driving gear 1 is engaged with a blade bearing gear to perform transmission, thereby adjusting the pitch angle of a blade. After the machine is stopped, the band-type brake of the variable pitch motor is released, and the torque of the band-type brake is transmitted to the blade bearing through the motor shaft, so that the position of the blade is fixed.
As the power of the fan is increased, the diameter of the wind wheel, namely the length of the blade, is increased. The driving torque of a variable pitch motor and the braking torque of a motor band-type brake required by design are increased more and more. In order to meet the typhoon resistance requirement of the fan in the typhoon frequent area, the requirement of the fan on the brake braking torque of the variable pitch motor is far higher than the requirement on the maximum driving torque of the motor during rotation. According to the traditional pitch-variable motor driving mode, the size of a band-type brake of a pitch-variable motor is limited by the installation position of the pitch-variable motor and cannot be infinitely increased, and the improvement of braking torque is limited. Or the cost of the band-type brake is greatly increased in order to achieve the required braking torque, and the reliability of the band-type brake is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a structure that can make things convenient for practicality to increase fan paddle braking moment of torsion is provided.
In order to solve the technical problem, the utility model discloses a following technical scheme:
the utility model provides a structure for increasing fan paddle braking moment of torsion, every paddle root of fan all has the bearing gear, and this bearing gear is become the drive gear drive of the oar motor that corresponds with it specially in the fan becomes the oar system, its improvement lies in: and a brake gear meshed with the fan blade bearing gear is also arranged, and an independent band-type brake is arranged for the brake gear.
The utility model has the advantages that:
the structure disclosed by the utility model can avoid the brake torque limitation caused by the motor installation size limitation of the band-type brake, and expand the output range of the brake torque of the paddle band-type brake; after the independent band-type brake is adopted, the size of the motor is reduced, the convenience of mechanical layout in the fan hub is improved, the space requirement of the hub is reduced, and the cost of the hub is reduced conveniently. The band-type brake is a great heating source, reduces the motor temperature rise after being separated from the variable pitch motor, and improves the service life and reliability of the encoder, the sensor and other devices attached to the motor.
Drawings
FIG. 1 is a schematic view of a prior art blade drive configuration;
fig. 2 is a schematic diagram of the structure disclosed in embodiment 1 of the present invention.
Detailed Description
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 merely illustrative of the invention and are not intended to limit the invention.
Embodiment 1, as shown in fig. 2, this embodiment discloses a structure for increasing the braking torque of a fan blade, where a bearing gear 1 is arranged at the root of each blade of a fan, the bearing gear is driven by a driving gear 2 of a pitch motor, which is specially corresponding to the bearing gear, in a pitch system of the fan, and a braking gear 3 engaged with the bearing gear of the fan blade is further provided, the braking gear is parallel to the driving gear of the pitch motor, and an independent contracting brake is provided for the braking gear, which is specially used for braking when the fan is stopped.
When the variable pitch motor operates, the independent band-type brake is opened, and the variable pitch motor drives the blades to adjust the pitch. After the system is shut down, the independent band-type brake is locked, so that the braking torque required by the fan is provided, and the safety of the fan is ensured. The action logic of the independent band-type brake is consistent with the logic of the band-type brake attached to the motor.
The structure for increasing the braking torque of the fan blade disclosed by the embodiment solves the problem that the braking torque cannot be simply and conveniently increased due to the limitation of the installation size of the motor on the contracting brake of the variable-pitch motor, and realizes the random increase of the braking torque.
Claims (1)
1. The utility model provides a structure for increasing fan paddle braking moment of torsion, every paddle root at the fan all has the bearing gear, and this bearing gear is become the driving gear drive of the oar motor that corresponds with it specially in the fan becomes the oar system, its characterized in that: and a brake gear meshed with the fan blade bearing gear is also arranged, and an independent band-type brake is arranged for the brake gear.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122874207 | 2021-11-22 | ||
| CN202122874207X | 2021-11-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216588935U true CN216588935U (en) | 2022-05-24 |
Family
ID=81616462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123301669.9U Active CN216588935U (en) | 2021-11-22 | 2021-12-25 | Structure for increasing braking torque of fan blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216588935U (en) |
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2021
- 2021-12-25 CN CN202123301669.9U patent/CN216588935U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |