CN216241111U

CN216241111U - Remote monitoring system for icing thickness of fan blade

Info

Publication number: CN216241111U
Application number: CN202123122054.XU
Authority: CN
Inventors: 郑皓成; 周勃; 张雪岩; 李慧
Original assignee: Shenyang University of Technology
Current assignee: Shenyang University of Technology
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2022-04-08
Anticipated expiration: 2031-12-14

Abstract

The utility model relates to deicing of wind power blades, in particular to a remote monitoring system for the icing thickness of a fan blade. The method provides the condition of ice thickness monitoring for the current ubiquitous system for deicing by using the thermal energy, more accurately reduces unnecessary energy waste and reasonably utilizes energy. Comprises a wind power generator blade; the S surface and the P surface of each blade of the wind driven generator are sequentially provided with a maximum chord length groove, a blade spanwise central groove and a blade tip groove from a hub to a tip; and icing sensors are respectively arranged in the maximum chord length groove, the blade spanwise central groove and the blade tip groove.

Description

Remote monitoring system for icing thickness of fan blade

Technical Field

The utility model relates to deicing of wind power blades, in particular to a remote monitoring system for the icing thickness of a fan blade.

Background

The current wind power industry is generally faced with the problem of icing of wind turbine blades caused by weather. Icing changes the geometry of the blade air motion and creates a counter torque that reduces energy production resulting in energy losses and fatigue damage due to additional resonance that reduces the useful life of the blade. In addition to the above main aspects, there are potential hazards such as failure of the monitoring system, anemometer, vane and sensor due to ice coating, and safety problems caused by ice falling off due to centrifugal action of the blades. At present, the method generally adopted for coping with the icing phenomenon is to completely melt an ice layer attached to the outer surface of the blade into water by utilizing a system heating mode. Under the actual operating condition, the ice layer can be completely eliminated only by eliminating the proper thickness of the ice layer under the action of centrifugation.

Therefore, there is a general need in the market today for a system that can accurately monitor the thickness of ice on a wind turbine blade remotely. The development condition of the ice layer on the outer surface of the blade, which is in the beginning of icing, can be specifically monitored, and the change of the thickness of the ice layer can be accurately monitored when the gas-heated deicing system is processed, so that whether the designed deicing thickness is reached or not is judged, the time point of controlling the on-off of the deicing system designed in a heat energy utilization mode can be fed back according to the monitoring information, and the purpose of reasonably utilizing energy is finally achieved.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides a remote monitoring system for the icing thickness of a fan blade.

In order to achieve the purpose, the utility model adopts the following technical scheme, which is characterized by comprising a wind driven generator blade; the S surface and the P surface of each blade of the wind driven generator are sequentially provided with a maximum chord length groove, a blade spanwise central groove and a blade tip groove from a hub to a tip; and icing sensors are respectively arranged in the maximum chord length groove, the blade spanwise central groove and the blade tip groove.

Further, the maximum chord length groove is positioned at the maximum chord length position of the S surface or the P surface of the wind driven generator blade; the blade spanwise central groove is positioned in the blade spanwise central part of the S surface or the P surface of the wind driven generator blade; the blade tip recess is located at the blade tip.

Further, the icing sensor is connected to an icing control system arranged at the inner surface of the blade root by means of wires. The icing control system adopts 2G-4G compatible communication and is in wireless connection with the cloud platform.

Furthermore, an electric push rod is arranged in the groove (namely on the main beam of the blade), and the end part of a rod body of the electric push rod is connected with the icing sensor.

Furthermore, the airfoil girder is provided with holes leading to two webs inside the blade, electric wires are fixed on an inner skin of the girder, and the electric wires lead to the root of the blade through the holes.

Compared with the prior art, the utility model has the beneficial effects.

The utility model relates to a fan blade icing thickness remote monitoring system, which comprises: the icing sensor is located at the positions, such as the maximum site of the blade, the small electric push rod is located inside the blade groove, the working state of the icing sensor is convenient to adjust according to the actual external environment condition, the electric wire located in the middle space of the two webs of the blade transmits acquired signals to the icing control system located at the root part of the blade, and finally the icing information is uploaded to the cloud platform to achieve the purpose of monitoring the remote icing thickness. The utility model provides the condition of ice thickness monitoring for the current ubiquitous system for deicing by using the thermal energy, and provides information for the time when the system is switched on and off, thereby more accurately reducing unnecessary energy waste and reasonably utilizing energy.

Drawings

The utility model is further described with reference to the following figures and detailed description. The scope of the utility model is not limited to the following expressions.

FIG. 1 is a schematic illustration of an apparatus system for remote monitoring of an icing thickness of a wind turbine blade according to an exemplary embodiment.

FIG. 2 is a schematic illustration of an icing sensor arrangement for an airfoil section according to an exemplary embodiment.

FIG. 3 is a schematic illustration of a particular embodiment of an ice sensor and main beam mounting arrangement.

In the figure, 1 hub, 2 wind driven generator blades, 3 icing control systems, 4 maximum chord length grooves, 5 blade spanwise central grooves, 6 blade tip grooves, 7 electric wires, 8 main beams, 9 web plates, 10 main beam inner skins, 11 arc-shaped top covers, 12 small electric push rods, 13 ices, 14 main beam holes and 15 icing sensors are arranged.

Detailed Description

The P-side (windward side) and the S-side (leeward side) of the blade 2.

As shown in FIGS. 1-3, the icing sensors 15 of the present invention are disposed at the blade maximum chord length, at the blade span-wise midpoint, and at the blade tip notch. The icing sensor 15 can monitor the thickness of icing on the outer surface of the blade 2 when being exposed to the environment completely and icing occurs together, and transmits signals to the icing control system 3 arranged on the inner surface of the root part of the blade 2 through the electric wire 7. The small electric putter 12, i.e. the putter base, is attached to the blade 2 in the form of a bolt and the groove is located just inside the blade 2 completely when the small electric putter 12 is fully retracted. When the outside generates an icing environment, the small electric push rod 12 can completely send the icing sensor 15 to the outer surface of the blade 2. The icing control system 3 can support 2G-4G compatible communication, and data can be transmitted to the cloud platform in real time to output ice layer thickness information. A hole 14 leading to a closed space formed by two webs 9 in the blade 2 is formed in the main wing beam 8, and an electric wire 7 is fixed on an inner skin 10 of the main beam and leads to the root of the blade 2 to transmit electric signals.

Specifically, a wind turbine blade 2 at a hub portion of the wind turbine is fixed to the wind turbine hub 1. The icing control system 3 is arranged at the inner surface of the blade root and receives the icing signal transmitted by the icing sensor 15. The icing sensor 15 is respectively arranged at the maximum chord length position of the S surface and the P surface of the wind driven generator blade, the spanwise center position of the blade and the tip end position of the blade. The positions of the icing sensors and the airfoil main beam 8 of the blade are required to be cut into holes so that the icing sensors 15 can be completely retracted into the blade. The icing sensor 15 adopts a mode of directly connecting wired ports, and transmits icing information to the icing control system 3 by using the wire 7. The grooves are all arranged at the position of a main beam 8 of the wind driven generator blade 2, and the icing sensors 3 are arranged on the S surface and the P surface of the blade. The wires 7 are led into the closed space formed by the two webs 9 through the girder holes 14, and are fixed on the inner surface skin 10 of the blade girder, and the wires 7 are led to the root of the blade. The icing control system 3 can support 2G-4G compatible communication, ensures that data can be transmitted to a cloud platform in real time to output ice layer thickness information, and achieves the purpose of remote monitoring.

In the first preferred scheme, the arc-shaped top cover 11 on the upper surface of the icing sensor protects the icing sensor from being impacted and damaged by external sundries.

In the second preferred scheme, when the temperature of the external environment is lower than 0 ℃, the small electric push rod 12 sends the icing sensor out of the groove to enable the icing sensor to be completely exposed in the icing environment, and the icing phenomenon is generated together with the outside.

As shown in FIG. 3, the specific installation of the wind turbine blade icing sensor is as follows. The upper portion of the icing sensor 3 is provided with the arc-shaped top cover 11 for protecting the icing sensor 3 from being damaged by foreign matters, the icing environment time is less than 1/4 all the year round, and the small electric push rod 12 can be adopted to shrink the icing sensor 3 into the groove when the icing information does not need to be collected. The base of the small electric push rod 12 is connected with the blade in a bolt mode. When the external environment is lower than 0 ℃, the small electric push rod 12 is operated to push the icing sensor 3 out of the groove, so that the icing sensor is completely exposed in the external icing environment to be iced synchronously with the blade, and the thickness of the ice 13 is monitored. The electric wires 7 extend to the inside of the blade through the main beam holes 14 to transmit electric signals.

It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the utility model.

Claims

1. A remote monitoring system for icing thickness of a fan blade comprises a wind driven generator blade; the method is characterized in that: the S surface and the P surface of each blade of the wind driven generator are sequentially provided with a maximum chord length groove, a blade spanwise central groove and a blade tip groove from a hub to a tip; and icing sensors are respectively arranged in the maximum chord length groove, the blade spanwise central groove and the blade tip groove.

2. The system of claim 1, wherein the system is configured to remotely monitor icing thickness of a wind turbine blade, and further comprises: the maximum chord length groove is positioned at the maximum chord length part of the S surface or the P surface of the wind driven generator blade; the blade spanwise central groove is positioned in the blade spanwise central part of the S surface or the P surface of the wind driven generator blade; the blade tip recess is located at the blade tip.

3. The system of claim 1, wherein the system is configured to remotely monitor icing thickness of a wind turbine blade, and further comprises: the icing sensor is connected with an icing control system arranged at the inner surface of the root of the blade through an electric wire; the icing control system adopts 2G-4G compatible communication and is in wireless connection with the cloud platform.

4. The system of claim 1, wherein the system is configured to remotely monitor icing thickness of a wind turbine blade, and further comprises: an electric push rod is installed in the groove, and the end part of a rod body of the electric push rod is connected with the icing sensor.

5. The system of claim 1, wherein the system is configured to remotely monitor icing thickness of a wind turbine blade, and further comprises: the airfoil girder is provided with holes leading to two webs inside the blade, electric wires are fixed on an inner skin of the girder, and the electric wires lead to the root of the blade through the holes.