CN118270241A - Rotor blade deicing system and method - Google Patents
Rotor blade deicing system and method Download PDFInfo
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Abstract
The invention relates to a rotor blade deicing system and a rotor blade deicing method, belongs to the technical field of rotor deicing, and solves the technical problem that when an existing electrothermal deicing system is used for heating and deicing, unbalance of a blade rotation angle is easy to cause severe vibration of the blade. The system of the invention comprises: the ice detector, the ice removing control device and the heating elements send an ice signal when the ice detector detects ice; each blade of the rotor wing is divided into a plurality of heating areas along the spreading direction, each heating area is provided with a heating element, the heating elements at the corresponding positions of the rotation direction of each blade rotor wing are in a group, and the deicing control device controls the heating elements to periodically execute heating deicing operation when receiving icing signals; the heating deicing operation is to heat the corresponding heating areas sequentially according to a preset sequence by each group of heating elements. According to the invention, when the rotor blade is heated and deicing is carried out, the phenomenon that the blade severely vibrates due to unbalanced rotation angle of the blade can be avoided.
Description
Technical Field
The invention relates to the technical field of rotor deicing, in particular to a rotor blade deicing system and a rotor blade deicing method.
Background
Due to the complex diversity of flight environments, aircraft rotors (or propellers) can freeze in many cases. Rotor icing is mainly affected in three ways: 1) Causing rotor instability, resulting in severe vibration and control difficulties; 2) The aerodynamic performance of the wing profile of the rotor is greatly deteriorated, the resistance is increased, the lift coefficient is reduced, and the lift-drag ratio is reduced; 3) During icing, power is increased to maintain rotor speed, thereby increasing the aircraft's overhead. Therefore, in order to ensure normal flight performance of an aircraft, anti-icing or deicing of the rotor is required.
At present, a relatively mature and practical rotor anti-icing (deicing) technology adopts an electrothermal deicing system to heat rotor blades, so that ice can be thrown out under the action of centrifugal force generated by rotation of the rotor, and the aim of deicing is fulfilled. The existing electrothermal deicing system has an integral heating mode and a partition heating mode, when the partition heating mode is adopted to deicing the blade, heating elements are respectively arranged at different positions of the blade in a partition mode, the regions are usually the most easily frozen positions, but the mode easily causes severe vibration of the blade in the deicing process, so that the flying safety risk is caused.
In addition, the cables of the existing rotor wing electrothermal deicing system are more, and the assembly of the cables is very difficult.
Disclosure of Invention
In view of the above analysis, the embodiments of the present invention are directed to a rotor blade deicing system and a rotor blade deicing method, so as to solve the technical problem that when the existing electrothermal deicing system is used for heating and deicing, the rotation angle of the blade is easily unbalanced, and the blade is caused to vibrate severely.
In one aspect, embodiments of the present invention provide a blade deicing system for a tiltrotor aircraft, the system comprising: an icing detector, a de-icing control assembly and a plurality of heating elements,
The icing detector sends an icing signal when icing is detected;
each blade of the rotor wing is divided into a plurality of heating areas along the spreading direction of the blade, the number and the positions of the heating areas divided by each blade are consistent, each heating area is provided with one heating element, and the heating elements at the corresponding positions of the rotation direction of each blade rotor wing are in a group;
the deicing control device controls the heating element to periodically perform heating deicing operation when receiving the icing signal;
And the heating deicing operation is to heat the corresponding heating areas of each group of heating elements according to a preset sequence.
Based on a further improvement of the above system, the system further comprises: and each rotor wing is respectively provided with a power distribution device, the power distribution device is connected with a power supply device,
The power distribution device is provided with a plurality of power distribution channels, and each group of heating elements is respectively connected with one power distribution channel of the power distribution device;
And when receiving an icing signal, the deicing control device sends a deicing instruction to the power distribution device to control the on-off of the power distribution channel, so that each group of heating elements are controlled to sequentially perform periodic heating deicing operation on the heating area.
Based on a further development of the above system, the power distribution device is arranged at the hub of the rotor,
The power supply device is connected with the power distribution device through a slip ring, the slip ring is arranged at the end part of the rotor shaft of the rotor, one end of the slip ring is connected with the power supply device, and the other end of the slip ring is connected with the power distribution device.
Based on a further improvement of the above system, the power distribution device comprises: a main control board and a solid-state power controller,
The solid-state power controller is connected with the power supply device and is provided with a plurality of power distribution channels;
The main control board is connected with the deicing control unit to receive deicing instructions sent by the deicing control unit; the main control board is connected with the solid-state power controller, and the main control board controls the on-off of the power distribution channel of the solid-state power controller according to the received deicing instruction.
Based on a further improvement of the above system, the system further comprises a temperature sensor that detects an ambient temperature and sends the acquired ambient temperature to the de-icing control means;
When the icing detector detects icing, calculating the liquid water content of the atmosphere, and sending the obtained liquid water content of the atmosphere to the deicing control device;
When the deicing control device receives a deicing signal, a period of heating deicing operation, heating time of each heating element in each period and system heat-insulating time of intervals between two adjacent periods are calculated according to the ambient temperature and the atmospheric liquid water content.
Based on a further improvement of the above system, the icing signal comprises a light icing signal and a heavy icing signal,
The icing detector sends a light icing signal when detecting light icing, the icing detector sends a heavy icing signal when detecting heavy icing,
Wherein the period duration of the heating deicing operation at the time of slight icing and the heating time of each heating element in each period are respectively smaller than the period duration of the heating deicing operation at the time of severe icing and the heating time of each heating element;
the system heat-insulating time is longer when slightly icing than when severely icing.
Based on a further improvement of the above system, the preset sequence is: and the blade is arranged along the spreading direction of the blade from one end of the blade close to the rotor shaft to the other end of the blade far away from the rotor shaft.
Based on a further development of the above system, the areas of the heating zones are all equal and the heating time of each set of heating elements in each cycle of the heating deicing operation is the same.
Based on a further development of the above system, the heating element is a heating plate, a heating mesh or a heating mat,
The heating element is applied to a blade leading edge of the blade and extends from an upper airfoil surface of the blade leading edge to a lower airfoil surface of the blade leading edge.
In another aspect, the present invention provides a method of rotor blade deicing, implemented based on a system as described above, the method comprising:
Each blade of the rotor wing is divided into a plurality of heating areas along the spreading direction of the blade, the number and the positions of the heating areas divided by each blade are consistent, and the heating areas at the positions corresponding to the rotating direction of each blade rotor wing are set as a group;
When icing is detected, periodically heating and deicing the blades of the rotor wing;
Wherein the heating deicing operation is: and heating the heating areas of each group in turn according to a preset sequence.
Advantageous effects
1. According to the invention, the number and the positions of the heating areas divided by each blade are consistent, and the heating elements at the positions corresponding to the rotation directions of the rotor wings of each blade are set as a group to heat the corresponding heating areas at the same time when heating deicing operation is carried out, so that the heating areas at the same positions of all the blades of the rotor wings can be heated at each moment, ice layer falling has certain consistency, and severe vibration of the blades caused by unbalanced rotation angles of the blades is avoided, and further flying accidents are caused.
2. In the invention, the power distribution device with a plurality of power distribution channels is arranged, and each power distribution channel is respectively connected with one group of heating elements, so that the power supply device can supply power to the group of heating elements at the same time, the control is simple, the heating power of each heating element of the group is uniform, and the uniformity of ice layer falling is ensured. Meanwhile, by arranging the power distribution device, the connecting cables of each group of heating assemblies can be concentrated together, so that the number of cables of the system is simplified, the assembly difficulty of the cables is reduced, the internal resistance consumption of the cables is reduced, and the weight of the system is reduced.
In the invention, the technical schemes can be mutually combined to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, like reference numerals being used to refer to like parts throughout the several views.
FIG. 1 is a schematic diagram of a blade heating control system according to an embodiment of the present invention;
FIG. 2 is a schematic view of a blade partition structure according to an embodiment of the present invention;
FIG. 3 is a timing diagram of blade heating control during light icing in an embodiment of the present invention;
FIG. 4 is a timing diagram of blade heating control during severe icing in accordance with an embodiment of the present invention;
FIG. 5 is a schematic view of a tiltrotor aircraft according to embodiments of the present invention;
fig. 6 is a flowchart of a blade heating control method according to an embodiment of the present invention.
Reference numerals:
1-a paddle; A. b, C, D, E, F heating zones; 2-rotor; 3-slip rings; 4-power distribution device.
Detailed Description
The following detailed description of preferred embodiments of the application is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the application, are used to explain the principles of the application and are not intended to limit the scope of the application.
In one embodiment of the present invention, a rotor blade deicing system is disclosed, as shown in FIG. 1. The system comprises: an icing detector, a de-icing control assembly and a plurality of heating elements. The icing detector sends an icing signal when icing is detected; each blade 1 of the rotor wing 2 is divided into a plurality of heating areas along the spreading direction, the number and the positions of the heating areas divided by each blade 1 are consistent, each heating area is provided with one heating element, and the heating elements at the corresponding positions of the rotor wing rotation directions of the blades are in a group; the deicing control device controls the heating element to periodically perform heating deicing operation when receiving the icing signal; and the heating deicing operation is to heat the corresponding heating areas of each group of heating elements according to a preset sequence.
The condition that heating positions on each blade of a rotor are inconsistent in the same time easily occurs in the existing blade partition heating mode, so that the ice layer of the rotor blade falls off inconsistently, unbalanced blade rotation angles are caused, and severe vibration of the blade is caused.
Compared with the prior art, in the embodiment of the invention, the number and the positions of the heating areas divided by each blade 1 are consistent, and meanwhile, when the heating deicing operation is carried out, the heating elements at the corresponding positions of the rotation directions of the rotor wings of each blade are set as a group to heat the corresponding heating areas at the same time, so that the heating areas at the same positions of all the blades 1 of the rotor wings 2 can be heated at each moment, the ice layer falling has certain consistency, and the severe vibration of the blades 1 caused by unbalanced rotation angles of the blades 1 is avoided, thereby causing flight accidents.
In implementation, the aircraft is allowed to generate a small amount of thin ice with the thickness of not more than 2.5mm in high-altitude flight, and deicing is carried out by adopting a heating mode, so that the aerodynamic performance is not affected significantly. After heating the heating area of the blade 1, the ice layer melts from the bottom, and then the residual ice is thrown out by the centrifugal force generated by the rotation of the rotor wing 2, so that the mode has the advantages of quick effect, no time and region limitation and the like.
In addition, in the invention, the blades 1 of the rotor wing 2 are periodically heated and deiced in a partition mode, so that instantaneous heating power is reduced, and in addition, the influence of ice overflow can be reduced in a periodic working mode, and the method is suitable for a rotor wing aircraft limited by the electric power of an on-board generator, such as a tilting rotor wing aircraft.
In one embodiment of the invention, the system further comprises: and the power distribution device 4 is respectively configured on each rotor wing 2, and the power distribution device 4 is connected with a power supply device. The power distribution device 4 is provided with a plurality of power distribution channels, and each group of heating elements is respectively connected with one power distribution channel of the power distribution device 4; and when receiving an icing signal, the deicing control device sends a deicing instruction to the power distribution device 4 to control the on-off of the power distribution channel, so that each group of heating elements are controlled to sequentially perform periodic heating deicing operation on the heating area. Specifically, the power supply device is a generator or a power distribution unit.
The existing paddle partition heating mode is also easy to generate the condition that the heating power of each heating area on the paddle is inconsistent, and the ice layer of the rotor paddle is inconsistent in falling off.
Compared with the prior art, in the embodiment of the invention, the power distribution device 4 with a plurality of power distribution channels is arranged, and each power distribution channel is respectively connected with one group of heating elements, so that the power supply device can supply power to the group of heating elements at the same time, the control is simple, the heating power of each heating element of the group is the same, the consistency of ice layer falling is ensured, and the consistency of ice layer falling is ensured.
It should be noted that the heating elements of each group in the embodiments of the present invention are the same heating elements. Wherein the heating power of the heating element is determined by the current flowing through the heating element and the resistance of the heating element itself. In the embodiment of the invention, each group of heating elements is connected with the same distribution channel of the distribution device 4, and the power supply device supplies the same power supply current or voltage to each heating element of the group, so that the heating power of each heating element of the group is uniform.
The mode that adopts the subregion to add heats removes ice, can make heating element's quantity and the quantity of cable more generally, and the difficulty of cable assembly is great. In the embodiment of the invention, the distribution device 4 is arranged, so that the connection cables of each group of heating assemblies can be concentrated together, the number of cables of the system is simplified, the difficulty in assembling the cables is reduced, the technical problem of high difficulty in the cable assembling technology in the prior art is solved, the internal resistance consumption of the cables is reduced, and the weight of the system is reduced.
Specifically, the power distribution device 4 is arranged at the hub of the rotor 2, the power supply device is connected with the power distribution device 4 through the slip ring 3, the slip ring 3 is arranged at the end part of the rotor shaft of the rotor 2, one end of the slip ring 3 is connected with the power supply device, and the other end is connected with the power distribution device 4.
In the embodiment of the invention, by providing the slip ring 3, the energizing of the heating elements provided on the blades 1 of the rotor 2 is achieved.
Further specifically, one end of the slip ring 3 is connected to the power distribution device 4 via a bus bar. Wherein the number of cables can be further simplified by providing the bus bars.
Specifically, the power distribution device 4 includes: a main control board and a solid state power controller. The solid-state power controller is connected with the power supply device and is provided with a plurality of power distribution channels; the main control board is connected with the deicing control unit to receive deicing instructions sent by the deicing control unit; the main control board is connected with the solid-state power controller, and the main control board controls the on-off of the power distribution channel of the solid-state power controller according to the received deicing instruction.
Further specifically, the main control board is connected with the deicing control device through an RS-422 bus.
The solid-state power controller is intelligent switch equipment, has the advantages of no contact, no arc, no noise, quick response, small electromagnetic interference, long service life, high reliability, convenience for remote control and the like, and is suitable for a power supply and distribution system of an airplane.
For example, as shown in fig. 1, the rotor 2 has 3 blades 1, namely a first blade, a second blade and a third blade, each blade 1 is divided into 6 heating zones along the spanwise direction thereof, and the heating elements on the 6 heating zones are sequentially numbered A, B, C, D, E, F, and correspondingly, the heating elements on the 6 heating zones are sequentially numbered A, B, C, D, E, F; six outputs of the solid power controller are SSPC1, SSPC2, SSPC3, SSPC4, SSPC5 and SSPC6 respectively. The output end SSPC1 is connected to the heating elements corresponding to the heating elements a on the three paddles 1, so that when the input end of the solid power controller is conducted with the output end SSPC1, the heating elements a on the three paddles start to heat at the same time. Likewise, the connection between the other output terminals of the solid state power controller and the heating element is the same as that of the output terminal SSPC1, and will not be described here again.
In general, when the heating zone is divided on the blade 1, the heating zone may be divided in the spanwise direction or in the chordwise direction. In the embodiment of the invention, the heating area is divided on the blade along the spanwise direction in consideration of the fact that the power required by the chordwise division is larger, so that the instantaneous heating power is lower. Specifically, the number of the heating areas divided by each paddle 1 in the spanwise direction thereof is 4 to 8, preferably 6. Too many partitions per blade 1 would complicate the system's wiring and increase the system weight; the number of the subareas is too small, the instantaneous heating power is larger, and the power supply and distribution power requirements on the electrical system are large.
Specifically, the preset sequence in the heating deicing operation is: along the span of the blade 1 from the end of the blade 1 close to the rotor shaft to the other end of the blade away from the rotor shaft.
Wherein, because the linear velocity of the end of the blade 1 far away from the rotor shaft is larger, water or just coagulated ice is thrown out relatively easily, thereby icing is relatively difficult to occur, and the linear velocity of the end of the blade 1 close to the rotor shaft is smaller, thereby icing is more easy to occur. In view of the above, in the embodiment of the present invention, when icing of the rotor wing 2 is detected, first, a heating deicing operation is performed from the root of the blade 1, so that the ice layer on the blade 1 is sequentially dropped out from the root of the blade 1.
As shown in fig. 2, in the embodiment of the present invention, each blade 1 is divided into 6 heating areas along the spanwise direction thereof, and the number of each heating area is A, B, C, D, E, F from one end of the blade 1 close to the rotor shaft to the other end of the blade far from the rotor shaft. When icing is detected, each blade 1 of rotor 2 is simultaneously subjected to a periodic heating deicing operation, i.e. heating zone A, B, C, D, E, F of each blade 1 in turn.
In one embodiment, the system further comprises a temperature sensor that detects an ambient temperature and sends the acquired ambient temperature to the de-icing control means. And when the icing detector detects icing, calculating the liquid water content of the atmosphere, and sending the obtained liquid water content of the atmosphere to the deicing control device. When the deicing control device receives a deicing signal, a period of heating deicing operation, heating time of each heating element in each period and system heat-insulating time of intervals between two adjacent periods are calculated according to the ambient temperature and the atmospheric liquid water content.
Considering that the ambient temperature and the atmospheric liquid water content can influence weather icing conditions, the heating time of each heating element in each period and the system heat-insulating time of the interval between two adjacent periods are calculated according to the ambient temperature and the atmospheric liquid water content in the embodiment of the invention. Specifically, the icing signals include a light icing signal and a heavy icing signal, the icing detector sends the light icing signal when detecting light icing, and the icing detector sends the heavy icing signal when detecting heavy icing. Wherein the period duration of the heating deicing operation at the time of slight icing and the heating time of each heating element in each period are respectively smaller than the period duration of the heating deicing operation at the time of severe icing and the heating time of each heating element; the system heat-insulating time is longer when slightly icing than when severely icing.
In the embodiment of the invention, in order to further reduce the power supply requirement and ensure the deicing effect, the deicing device is divided into two conditions of slight icing and severe icing according to the icing degree, and the period duration of heating deicing operation under the two conditions, the heating time (single-section heating time) of each heating element in each period and the system heat-insulating time are calculated respectively.
In particular, a shorter cycle length and shorter single-stage heating time, and longer system shut-down time are employed to save energy consumption when lightly icing, as compared to heavily icing conditions.
Wherein the icing level can be detected by an icing detector.
Specifically, the areas of the heating zones are equal, and the heating time of each group of heating elements in each period of heating deicing operation is the same. The areas of the heating areas divided by the paddle 1 are equal, so that the stability of instantaneous heating power is guaranteed; the heating time of each group of heating elements is the same, which is beneficial to ensuring the consistency of deicing effect and has simple control.
It should be noted that, due to the structural characteristics of the paddles, it is difficult to divide each paddle into a plurality of heating areas with completely equal areas, so that the areas of the heating areas are guaranteed to be substantially equal during implementation.
For example, when slightly icing, according to continuous maximum icing weather conditions, the water drop content LWC in the air is 0.8g/m 3, the ambient temperature T is-10 ℃, the heating time T 1 of each group of heating elements in each period when slightly icing is calculated to be 7s, the period duration T of the heating deicing operation is 42s, and the system heat-insulating time T 2 between two adjacent periods is 33s. Specifically, blade 1 heating control timing at the time of slight icing is shown in fig. 3.
For example, when severe icing occurs, according to the intermittent maximum icing meteorological conditions, the value of the ambient temperature T is-15 ℃, the heating time T 1 of each group of heating elements in each period when severe icing occurs is calculated to be 10s, the period duration T of the heating deicing operation is 60s, and the system heat-insulating time T 2 between two adjacent periods is 0s. That is, when severe ice formation occurs, the heating deicing operation is continuously performed for a plurality of cycles. Specifically, blade 1 heating control timing at the time of severe icing is shown in fig. 4.
It should be noted that the heating time of each set of heating elements should not be too long, so as to avoid the ice layer in the heating area from being melted into water and then flowing to other heating areas for re-icing. In addition, in the embodiment of the invention, when the heating deicing operation is performed, high heat flow input needs to be applied to the heating element in a short time so as to reduce heat transfer loss.
In addition, when icing is not detected and the external environment does not have icing conditions, for example, the environment temperature exceeds 20 ℃, the blade deicing system is automatically closed, so that energy consumption is saved.
In one embodiment, the heating element is a heating plate, a heating mesh or a heating mat, which is applied to the blade front edge of the blade 1 and which extends from the upper airfoil surface of the blade front edge to the lower airfoil surface of the blade front edge.
Specifically, the heating sheet can be a metal heating sheet prepared by etching, such as a stainless steel heating sheet; the heating net can be a metal heating net prepared by etching, such as a stainless steel heating net; the heating pad may be a heating pad woven from resistive wires.
Also, in the present embodiment, the heating element is laid down at this position, considering that the rotor 2 icing is mainly concentrated at the blade front edge of the blade 1.
Preferably, the upper airfoil surface of the heating element at the leading edge of the blade has a larger coverage area than the lower airfoil surface in the chord-wise direction of the blade 1, taking into account the influence of the lower airfoil surface return ice. For example, in the chordwise direction, the heating element covers 12% of the upper airfoil surface and 22% of the lower airfoil surface.
Preferably, in the span-wise direction of the blade 1, the heating element covers 20% to 92% of the span length of the blade 1.
As shown in fig. 6, the embodiment of the present invention further provides a blade deicing method for a tiltrotor aircraft, which is implemented based on the system described above. The method comprises the following steps:
step 1, dividing each blade 1 of a rotor wing 2 into a plurality of heating areas with the same quantity along the spreading direction, and setting the heating areas at the corresponding positions of the rotation direction of each blade as a group;
step 2, when icing is detected, periodically heating and deicing the blades 1 of the rotor wing 2; wherein the heating deicing operation is: and heating the heating areas of each group in turn according to a preset sequence.
In practice, as shown in fig. 5, a tiltrotor aircraft has two such rotors 2 arranged symmetrically. When icing of the rotor wing 2 is detected, periodic heating deicing operation is started on each blade 1 of the two symmetrically arranged rotor wings 2, so that the two symmetrically arranged rotor wings 2 are balanced, and instability of the aircraft is avoided.
Furthermore, it should be noted that the system and method of the present invention may also be applied to components of the rotor's cap, fairing, shimmy damper, etc. that require de-icing.
Those skilled in the art will appreciate that all or part of the flow of the methods of the embodiments described above may be accomplished by way of a computer program to instruct associated hardware, where the program may be stored on a computer readable storage medium. Wherein the computer readable storage medium is a magnetic disk, an optical disk, a read-only memory or a random access memory, etc.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. A rotor blade deicing system, said system comprising: an icing detector, a de-icing control assembly and a plurality of heating elements,
The icing detector sends an icing signal when icing is detected;
Each blade of the rotor wing is divided into a plurality of heating areas along the spreading direction of the blade, the number and the positions of the heating areas divided by each blade are consistent, each heating area is provided with one heating element, and the heating elements at the corresponding positions of the rotation direction of each blade rotor wing are in a group;
the deicing control device controls the heating element to periodically perform heating deicing operation when receiving the icing signal;
And the heating deicing operation is to heat the corresponding heating areas of each group of heating elements according to a preset sequence.
2. The system of claim 1, wherein the system further comprises: and each rotor wing is respectively provided with a power distribution device, the power distribution device is connected with a power supply device,
The power distribution device is provided with a plurality of power distribution channels, and each group of heating elements is respectively connected with one power distribution channel of the power distribution device;
And when receiving the icing signal, the deicing control device sends a deicing instruction to the power distribution device to control the on-off of the power distribution channel, so that each group of heating elements are controlled to sequentially perform periodic heating deicing operation on the heating area.
3. The system of claim 2, wherein the power distribution device is disposed at a hub of the rotor,
The power supply device is connected with the power distribution device through a slip ring, the slip ring is arranged at the end part of the rotor shaft of the rotor, one end of the slip ring is connected with the power supply device, and the other end of the slip ring is connected with the power distribution device.
4. The system of claim 2, wherein the power distribution device comprises: a main control board and a solid-state power controller,
The solid-state power controller is connected with the power supply device and is provided with a plurality of power distribution channels;
The main control board is connected with the deicing control device to receive deicing instructions sent by the deicing control device; the main control board is connected with the solid-state power controller, and the main control board controls the on-off of the power distribution channel of the solid-state power controller according to the received deicing instruction.
5. The system according to any one of claims 1-4, further comprising a temperature sensor that detects an ambient temperature and sends the acquired ambient temperature to the de-icing control means;
When the icing detector detects icing, calculating the liquid water content of the atmosphere, and sending the obtained liquid water content of the atmosphere to the deicing control device;
When the deicing control device receives a deicing signal, a period of heating deicing operation, heating time of each heating element in each period and system heat-insulating time of intervals between two adjacent periods are calculated according to the ambient temperature and the atmospheric liquid water content.
6. The system of claim 5, wherein the icing signal comprises a light icing signal and a heavy icing signal,
The icing detector sends a light icing signal when detecting light icing, the icing detector sends a heavy icing signal when detecting heavy icing,
Wherein the period duration of the heating deicing operation at the time of slight icing and the heating time of each heating element in each period are respectively smaller than the period duration of the heating deicing operation at the time of severe icing and the heating time of each heating element;
the system heat-insulating time is longer when slightly icing than when severely icing.
7. The system of any one of claims 1-4, wherein the predetermined sequence is: and the blade is arranged along the spreading direction of the blade from one end of the blade close to the rotor shaft to the other end of the blade far away from the rotor shaft.
8. The system of any one of claims 1-4, wherein the heating zones are all equal in area and the heating time for each set of heating elements in each cycle of heating deicing operation is the same.
9. The system of any one of claims 1-4, wherein the heating element is a heat patch, a heat mesh, or a heat pad,
The heating element is applied to a blade leading edge of the blade and extends from an upper airfoil surface of the blade leading edge to a lower airfoil surface of the blade leading edge.
10. A method of deicing rotor blades, implemented on the basis of the system as recited in any one of claims 1-9, the method comprising:
Each blade of the rotor wing is divided into a plurality of heating areas along the spreading direction of the blade, the number and the positions of the heating areas divided by each blade are consistent, and the heating areas at the positions corresponding to the rotating direction of each blade rotor wing are set as a group;
When icing is detected, periodically heating and deicing the blades of the rotor wing;
Wherein the heating deicing operation is: and heating the heating areas of each group in turn according to a preset sequence.
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| CN202410458072.4A CN118270241A (en) | 2024-04-16 | 2024-04-16 | Rotor blade deicing system and method |
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| CN202410458072.4A CN118270241A (en) | 2024-04-16 | 2024-04-16 | Rotor blade deicing system and method |
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| CN118270241A true CN118270241A (en) | 2024-07-02 |
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| Country | Link |
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