Turbofan engine electric heating anti-icing structure and turbofan engine electric heating anti-icing method

Abstract

The turbofan engine electric heating anti-icing structure comprises an electric heating anti-icing assembly used for generating electricity, heating and preventing icing, and the electric heating anti-icing assembly comprises a permanent magnet power generation component, a detection control system and a plurality of electric heating wires which are connected in sequence. The permanent magnet power generation components are arranged on the fan blade disc and the bearing seat, or the fan blade disc and the inner culvert rectifier, or the fan blade disc and the outer culvert rectifier so as to generate electric energy in the rotating process of the fan blade disc. And the plurality of electric heating wires are respectively arranged at anti-icing positions needing heating and anti-icing in the inner culvert rectifier, the outer culvert rectifier and the shunting casing. And the detection control system is used for detecting the temperature value of each anti-icing position and correspondingly distributing the electric energy generated by the permanent magnet power generation component to the corresponding electric heating wire according to the temperature value. According to the turbofan engine, the structural cost can be effectively reduced, the overall structural layout of the turbofan engine is simple and compact, targeted anti-icing can be achieved, and the energy-saving performance is better.

Description

Technical Field

[0001] The present invention relates to the technical field of turbofan engine anti-icing, and in particular, to an electric thermal anti-icing structure for a turbofan engine. In addition, the present invention also relates to an electric thermal anti-icing method for a turbofan engine using the electric thermal anti-icing structure for a turbofan engine. Background Art

[0002] For turbofan engines, the flow channel parts of the fan section (such as the attached Figure 1 As shown in the figure, it usually includes fan blade disk, intake cone, inner rectifier, outer rectifier, splitter casing, etc.) Because it faces the airflow directly and has a relatively low temperature, the rotor parts and stator parts with low tangential speed are prone to ice formation when the temperature is low, which can cause unstable rotor operation and reduced performance. The falling large ice cubes may damage the blade parts at the rear, which can seriously affect the reliability of engine operation. Therefore, it is necessary to take corresponding measures to prevent ice formation.

[0003] At present, the more mature technology is bleed air anti-icing, such as the following Figure 2 As shown, the main means is to add bleed air anti-icing valves and bleed air pipelines, temperature sensors, controllers and other accessories. When the temperature sensor senses the need for engine anti-icing, the controller sends an anti-icing valve signal to open the valve, inputs high-temperature gas from the high-temperature gas source position into the pipeline, and then passes through the splitter case (an integrated structure formed by the splitter case outer ring, the splitter case middle ring, and the splitter case inner ring connected through the outer duct support plate and the inner duct support plate), the inner rectifier (an integrated structure formed by the inner rectifier outer ring and the inner rectifier inner ring connected through the inner rectifier blades), the outer rectifier (an integrated structure formed by the outer rectifier outer ring and the outer rectifier inner ring connected through the outer rectifier blades) and other components corresponding to the bleed air anti-icing heating structure (usually a through hole passing through the inner and outer rings and blades), the hot gas is guided to the part that needs to be heated to achieve the anti-icing function. In order to ensure the efficiency and reliability of bleed air anti-icing, the air collecting cavity formed between the splitter casing, the outer rectifier and the inner rectifier needs to have a rubber ring sealing position; since a gas channel needs to be formed to ensure continuous heating, hot gas dissipation and losses along the way are difficult to avoid during bleed air anti-icing; the low-temperature end is usually made of aluminum alloy, and in order to meet the anti-icing requirements, the bleed air temperature is usually higher, so the thermal shock of the bleed air on the parts along the way has a certain impact on the strength of the parts themselves.

[0004] The disadvantages of the above-mentioned bleed air anti-icing technology are as follows: 1. The air bleed distance is long and the heat dissipation and loss along the way are large, resulting in low bleed air heating efficiency and a significant impact on the engine thermal efficiency; 2. When the bleed air is heated, different parts such as the shunt casing, inner rectifier, and outer rectifier are heated at the same time, and there are no targeted anti-icing heating measures; 3. In order to meet the anti-icing requirements, the bleed air temperature is usually higher, so the thermal shock of the bleed air on the parts along the way has a certain impact on the strength of the parts themselves; 4. It has high requirements on the sealing and patency of parts along the way, reliability of accessories, etc., and occupies more space resources and has high cost. Summary of the invention

[0005] The present invention provides an electric heating anti-icing structure and an electric heating anti-icing method for a turbofan engine, so as to solve the technical problems existing in the existing external bleed air anti-icing method, namely, low bleed air heating efficiency, great influence on engine thermal efficiency, no targeted anti-icing heating measures, impact on the strength of parts themselves, high requirements on the sealing and patency of parts along the way, reliability of accessories, etc., and large space resources are occupied and the cost is high.

[0006] The technical solution adopted by the present invention is as follows: A turbofan engine electric thermal anti-icing structure comprises a fan blade disk fixedly mounted on the outer circle of a core shaft, a bearing seat sleeved on the outer circle of the core shaft, an inner rectifier sleeved outside the bearing seat, an outer rectifier sleeved outside the inner rectifier and a shunt casing sleeved on the outer circle of the core shaft. The turbofan engine electric thermal anti-icing structure also comprises an electric thermal anti-icing assembly for generating electricity, heating and anti-icing. The electric thermal anti-icing assembly comprises a permanent magnet power generation component, a detection control system and a plurality of heating wires connected in sequence; the permanent magnet power generation component is separately arranged on the fan blade disk and the bearing seat, or is separately arranged on the fan blade disk and the inner rectifier, or is separately arranged on the fan blade disk and the outer rectifier, so as to generate electric energy during the rotation of the fan blade disk; the plurality of heating wires are separately arranged at the anti-icing positions in the inner rectifier, the outer rectifier and the shunt casing where heating and anti-icing are required; the detection control system is used to detect the temperature value of each anti-icing position, and distribute the electric energy generated by the permanent magnet power generation component to the corresponding heating wire according to the high and low temperature values.

[0007] Furthermore, the permanent magnet power generation component includes an annular permanent magnet ring and an annular power generation coil; the permanent magnet ring is connected to the rotor mounting interface of the fan blade disk; the power generation coil is connected to the inner ring mounting interface of the inner ring of the inner rectifier, or connected to the bearing seat mounting interface of the bearing seat, and the power generation coil is connected to the detection and control system, and the permanent magnet ring and the power generation coil are both located in the hollow cavity formed by the fan blade disk, the bearing seat and the inner ring of the inner rectifier.

[0008] Furthermore, the generating coil comprises a plurality of coil rings, each coil ring is provided with a control switch for controlling the on and off of the coil ring, and each control switch is respectively connected to the detection control system.

[0009] Furthermore, the detection control system includes a controller connected to the generator coil, a distributor connected to the controller, and several detectors for detecting the temperature of the anti-icing position; the several detectors are arranged at each anti-icing position and are respectively connected to the controller to feed back the temperature value of the corresponding anti-icing position to the controller; the distributor is respectively connected to several heating wires to distribute the corresponding electrical energy to the corresponding heating wires under the control of the controller.

[0010] Furthermore, the controller is located in the hollow cavity and connected to the bearing seat mounting interface or the inner ring mounting interface; the distributor is connected to the diverter cone formed between the outer rectifier and the inner ring rectifier.

[0011] Furthermore, the plurality of heating wires on the outer rectifier are buried one by one in the plurality of outer rectifier blades of the outer rectifier; the plurality of heating wires on the inner rectifier are buried one by one in the plurality of inner rectifier blades of the inner rectifier; the plurality of heating wires on the shunt casing are buried one by one in the plurality of inner channel support plates of the shunt casing, or are buried one by one in the plurality of inner channel support plates and the plurality of outer duct support plates of the shunt casing; and a plurality of heating wires are also buried in the shunt cone between the outer rectifier and the inner rectifier, which are spaced in sequence along the circumferential direction.

[0012] Furthermore, a plurality of detectors on the outer rectifier and a plurality of detectors on the inner rectifier are arranged evenly spaced along the circumferential direction; a plurality of detectors on the diverter casing are arranged evenly along the circumferential direction of the inner channel support plate of the diverter casing, or are arranged evenly along the circumferential direction of the inner channel support plate and the outer duct support plate of the diverter casing; a plurality of detectors are evenly spaced along the circumference of the diverter cone between the outer rectifier and the inner rectifier.

[0013] Furthermore, a detector is also provided at the inlet of the engine.

[0014] According to another aspect of the present invention, there is also provided a method for electric thermal anti-icing of a turbofan engine, which adopts an electric thermal anti-icing structure of a turbofan engine as any one of the above-mentioned items, and comprises the following steps: when the detection and control system detects that the temperature value of each anti-icing position is higher than the system set temperature value, the permanent magnet heating component remains disconnected; when the detection and control system detects that the temperature value of one or more anti-icing positions is lower than the system set temperature value, the permanent magnet heating component is turned on and started, and the detection and control system distributes the electric energy generated by the permanent magnet power generation component to the corresponding heating wire according to the temperature value of each anti-icing position; when the detection and control system detects that the temperature values ​​of all anti-icing positions are higher than the system set temperature value, the permanent magnet heating component is disconnected and the anti-icing ends.

[0015] Furthermore, in the step "When the detection and control system detects that the temperature value of one or more anti-icing positions is lower than the system set temperature value, the permanent magnet heating component is turned on and started, and the detection and control system distributes the electric energy generated by the permanent magnet power generation component to the corresponding heating wire according to the temperature value of each anti-icing position", if the detection and control system detects that the temperature value of some anti-icing positions is higher than the system set temperature value, the detection and control system controls the permanent magnet heating component to reduce the power generation power accordingly.

[0016] The present invention has the following beneficial effects: When the electric heating anti-icing structure of the present invention is used for anti-icing, since the permanent magnet power generation component, the detection control system and the electric heating wire are all reasonably built into the turbofan engine, compared with the existing external air bleed anti-icing method, the present invention does not need to add an air bleed pipeline and does not occupy the external space of the engine, thereby effectively reducing the structural cost, making the overall structural layout of the turbofan engine simple and compact, and having low requirements on the sealing and patency of the parts along the way and the reliability of the accessories; the present invention has a short electric energy transmission distance, so that the electric energy dissipation and the loss along the way are both small, and no thermal shock will be generated on the parts along the way, thereby not affecting the strength of the parts, and the electric energy heating efficiency is high, the anti-icing effect is good, and the thermal efficiency of the engine is not affected; the present invention generates electric energy for heating the electric heating wire through the rotation of the fan blade disk, so there is no need to bleed air from the outside of the engine, which does not affect the thermal efficiency of the engine, and at the same time, the rotation energy of the fan blade disk is recovered, and the resource utilization rate is high; the present invention also controls the intensity of heating at the anti-icing position through the setting of the detection control system, performs targeted anti-icing, has better energy saving, and can basically avoid local thermal shock to the parts, avoiding affecting the reliability of the parts.

[0017] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic diagram of the local structure of an existing turbofan engine; Figure 2 It is a schematic diagram of the existing turbofan engine internal bleed air anti-icing structure; Figure 3 Schematic diagram of the electric heating anti-icing structure of a turbofan engine according to a preferred embodiment of the present invention; Figure 4 It is a flow chart of the electric thermal anti-icing method for a turbofan engine according to a preferred embodiment of the present invention.

[0019] Legend: 1. Electric heating anti-icing assembly; 11. Electric heating wire; 12. Permanent magnetic ring; 13. Generator coil; 14. Controller; 15. Distributor; 16. Detector; 3. Mandrel; 4. Fan blade disc; 401. Rotor mounting interface; 5. Bearing seat; 501. Bearing seat installation interface; 61. inner ring of the internal rectifier; 610. inner ring mounting interface; 62. inner rectifier blades; 71. External rectifier blades; 81. Inner duct support plate; 82. Outer duct support plate; 9. Diverter cone. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0021] Reference Figure 3 The preferred embodiment of the present invention provides an electric heating anti-icing structure of a turbofan engine, comprising a fan blade disc 4 fixedly mounted on the outer circle of a core shaft 3, a bearing seat 5 sleeved on the outer circle of the core shaft 3, an inner rectifier sleeved outside the bearing seat 5, an outer rectifier sleeved outside the inner rectifier, and a shunt casing sleeved on the outer circle of the core shaft 3. The electric heating anti-icing structure of the turbofan engine also includes an electric heating anti-icing component 1 for power generation, heating and anti-icing. The electric heating anti-icing component 1 includes a permanent magnet power generation component, a detection control system and a plurality of electric heating wires 11 connected in sequence. The permanent magnet power generation component is separately arranged on the fan blade disc 4 and the bearing seat 5, or on the fan blade disc 4 and the inner rectifier, or on the fan blade disc 4 and the outer rectifier, so as to generate electric energy during the rotation of the fan blade disc 4. The plurality of electric heating wires 11 are separately arranged at the anti-icing positions in the inner rectifier, the outer rectifier and the shunt casing where heating and anti-icing are required. The detection control system is used to detect the temperature value of each anti-icing position, and distribute the electric energy generated by the permanent magnet power generation component to the corresponding heating wire 11 according to the temperature value.

[0022] When the electric heating anti-icing structure of the turbofan engine of the present invention is working, the detection and control system detects the temperature of each anti-icing position in real time. When the temperature of each anti-icing position is higher than the system set temperature, the detection and control system keeps the permanent magnet power generation component disconnected and does not generate electricity; when the detection and control system detects that the temperature value of one or more anti-icing positions is lower than the system set temperature value, the detection and control system controls the permanent magnet heating component to be turned on and started to generate electricity, and the detection and control system distributes the generated electricity to the corresponding heating wire 11 according to the temperature of each anti-icing position. If the temperature of the anti-icing position is much lower than the system set temperature, the detection and control system distributes more electricity to the corresponding anti-icing position according to the system setting method. If the temperature of the anti-icing position is only slightly lower than the system set temperature, the detection and control system distributes less electricity to the corresponding heating wire 11; when the detection and control system detects that the temperature values ​​of all anti-icing positions are higher than the system set temperature value, the detection and control system controls the permanent magnet heating component to be disconnected to end the anti-icing.

[0023] When the electric heating anti-icing structure of the present invention is used for anti-icing, since the permanent magnet power generation component, the detection control system and the electric heating wire 11 are all reasonably built-in in the turbofan engine, compared with the existing external bleed air anti-icing method, the present invention does not need to add bleed air pipelines and does not occupy the external space of the engine, thereby effectively reducing the structural cost, making the overall structural layout of the turbofan engine simple and compact, and having low requirements on the sealing and patency of the parts along the way and the reliability of the accessories; the present invention has a short power transmission distance, so that the power dissipation and loss along the way are small, and no thermal shock will be generated to the parts along the way, thereby It does not affect the strength of the parts, and the electric heating efficiency is high, the anti-icing effect is good, and it does not affect the thermal efficiency of the engine. The present invention generates electric energy for heating the heating wire 11 through the rotation of the fan blade disk 4, so there is no need to draw air from the outside of the engine, and it does not affect the thermal efficiency of the engine. At the same time, the rotation energy of the fan blade disk 4 is recovered, and the resource utilization rate is high. The present invention also controls the intensity of heating at the anti-icing position through the setting of the detection control system, performs targeted anti-icing, has better energy saving, and can basically avoid local thermal shock to the parts, thereby avoiding affecting the reliability of the parts.

[0024] Alternatively, if Figure 3As shown, the permanent magnet power generation component includes an annular permanent magnet ring 12 and an annular power generation coil 13. The permanent magnet ring 12 is connected to the rotor mounting interface 401 of the fan blade disk 4. The power generation coil 13 is connected to the inner ring mounting interface 610 of the inner rectifier inner ring 61 of the inner rectifier, or connected to the bearing seat mounting interface 501 of the bearing seat 5, and the power generation coil 13 is connected to the detection and control system, and the permanent magnet ring 12 and the power generation coil 13 are both located in the hollow cavity formed by the fan blade disk 4, the bearing seat 5 and the inner rectifier inner ring 61. In the electric heating anti-icing structure of the present invention, the permanent magnet ring 12 and the generator coil 13 are both located in the hollow cavity formed by the fan blade disk 4, the bearing seat 5 and the inner ring 61 of the inner rectifier, so that the hollow cavity can be effectively utilized, saving a large amount of space originally required for the installation of the bleed air anti-icing system, thereby not only effectively reducing the structural cost, but also making the overall structural layout of the turbofan engine simple and compact; and the installation position of the generator coil 13 is close to the inner channel anti-icing position, and at the same time, the heat dissipation and partial inner channel heating anti-icing work during the operation of the generator coil 13 can be solved, and because the generator coil 13 is close to the inner channel to the anti-icing position, the fan blade disk 4 is After machining the rotor mounting interface 401, machining the inner ring mounting interface 610 on the inner ring 61 of the internal rectifier, or machining the bearing seat mounting interface 501 on the bearing seat 5, quick installation can be achieved, and the original structure for drawing air from a distant high-temperature air source (including external air drawing pipelines, internal pipelines of parts, air collecting chambers, etc.) can be eliminated, thereby making the overall structural layout of the turbofan engine simple and compact, and at the same time, the electric energy transmission distance is short, and the electric energy dissipation and loss along the way are both small, so that no thermal shock will be generated on the parts along the way, thereby not affecting the strength of the parts, and the electric energy heating efficiency is high, the anti-icing effect is good, and it does not affect the thermal efficiency of the engine.

[0025] In this optional solution, the permanent magnet ring 12 can also be installed on other rotating rotor parts in the engine, and the power generation coil 13 can also be installed on other stationary stator parts in the engine. In a specific embodiment of the present invention, the permanent magnet ring 12 is installed on the rotor mounting interface 401 of the fan blade disk 4, and the power generation coil 13 is installed on the inner ring mounting interface 610 of the inner rectifier inner ring 61, so that the permanent magnet ring 12 and the power generation coil 13 are not only easy to install, but also have the shortest distance between them, and the power generation efficiency is higher, and the energy utilization rate is also higher.

[0026] Preferably, the generating coil 13 comprises a plurality of coil rings, each coil ring being provided with a control switch for controlling the on and off of the coil ring, and each control switch being respectively connected to the detection and control system, so that in actual operation, the detection and control system can open a plurality of coil rings simultaneously to increase power generation, or close one or more coil rings to reduce power generation according to the actual temperature of the anti-icing position detected, thereby saving energy to the greatest extent, and at the same time, the detection and control system can reasonably allocate energy.

[0027] Alternatively, if Figure 3 As shown, the detection control system includes a controller 14 connected to the power generation coil 13, a distributor 15 connected to the controller 14, and several detectors 16 for detecting the temperature of the anti-icing position. Several detectors 16 are arranged at each anti-icing position and are respectively connected to the controller 14, so as to feed back the temperature value of the corresponding anti-icing position to the controller 14. The distributor 15 is respectively connected to several heating wires 11, so as to distribute the corresponding electric energy to the corresponding heating wires 11 under the control of the controller 14. In this optional scheme, the controller 14 plays a master control role, which receives the temperature value of each anti-icing position detected by the detector 16, and controls the distributor 15 to distribute the corresponding electric energy to the corresponding heating wire 11 according to the temperature value, so as to control the height or intensity of the heating temperature of the anti-icing position accordingly, which is more energy-saving and can effectively avoid the situation where the local thermal shock to the parts affects the reliability of the parts.

[0028] In this option, if Figure 3 As shown, the controller 14 is located in the hollow cavity and is connected to the bearing seat mounting interface 501, or connected to the inner ring mounting interface 610. The distributor 15 is connected to the diverter cone 9 formed between the outer rectifier and the inner ring rectifier. In this optional solution, the controller 14 is located in the hollow cavity, which can effectively save a lot of space originally required for the installation of the bleed air anti-icing system; the distributor 15 is connected to the diverter cone 9 so as to be connected to each heating wire 11, and the connection distance is short, which is convenient for the layout inside the generator.

[0029] Preferably, the plurality of heating wires 11 on the outer rectifier are buried one by one in the plurality of outer rectifier blades 71 of the outer rectifier. The plurality of heating wires 11 on the inner rectifier are buried one by one in the plurality of inner rectifier blades 62 of the inner rectifier. The plurality of heating wires 11 on the shunt casing are buried one by one in the plurality of inner channel support plates 81 of the shunt casing, or buried one by one in the plurality of inner channel support plates 81 and the plurality of outer duct support plates 82 of the shunt casing. The shunt cone 9 between the outer rectifier and the inner rectifier is also buried with a plurality of heating wires 11 arranged in sequence along the circumferential direction. In this preferred embodiment, the heating wires 11 are embedded in the outer rectifier blades 71, the inner rectifier blades 62, the inner channel support plates 81, the outer duct support plates 82 (arranged as needed), and the shunt cone 9, so that less heat energy is dissipated, and energy consumption can be saved to the greatest extent.

[0030] Preferably, the detectors 16 on the outer rectifier and the detectors 16 on the inner rectifier are evenly spaced along the circumference. The detectors 16 on the splitter casing are evenly spaced along the circumference of the inner duct support plate 81 of the splitter casing, or are evenly spaced along the circumference of the inner duct support plate 81 and the outer duct support plate 82 of the splitter casing. The detectors 16 are evenly spaced along the circumference of the splitter cone 9 between the outer rectifier and the inner rectifier. The detectors 16 are evenly spaced along the circumference, which not only meets the temperature detection requirements, but also reduces the number of detectors 16 required, reduces costs, and simplifies the layout structure inside the engine.

[0031] Preferably, a detector 16 is also provided at the inlet of the engine, which is used to detect the temperature value of the engine inlet airflow and activate the controller so that when the inlet airflow temperature is low and may cause ice, the permanent magnet power generation component is connected in advance to prepare for power generation, so as to effectively avoid ice formation in the engine and quickly de-ice after ice formation.

[0032] Reference Figure 4 The preferred embodiment of the present invention further provides a turbofan engine electric thermal anti-icing method, which adopts any of the turbofan engine electric thermal anti-icing structures as described above, and comprises the following steps: When the detection control system detects that the temperature value of each anti-icing position is higher than the system set temperature value, the permanent magnetic heating component remains disconnected.

[0033] When the detection and control system detects that the temperature value of one or more anti-icing positions is lower than the system set temperature value, the permanent magnet heating component is turned on and started, and the detection and control system distributes the electric energy generated by the permanent magnet power generation component to the corresponding heating wire 11 according to the temperature value of each anti-icing position.

[0034] When the detection control system detects that the temperature values ​​of all anti-icing positions are higher than the system set temperature value, the permanent magnetic heating component is disconnected and the anti-icing ends.

[0035] When the electric thermal anti-icing method of the present invention is adopted, due to the setting of the electric thermal anti-icing structure, there is no need to add an air bleed pipeline and the external space of the engine is not occupied, which not only effectively reduces the structural cost, but also makes the overall structural layout of the turbofan engine simple and compact, and has low requirements on the sealing and patency of the parts along the way and the reliability of the accessories; the electric energy transmission distance is short, so that the electric energy dissipation and the loss along the way are small, and no thermal shock is generated on the parts along the way, thereby not affecting the strength of the parts, and the electric energy heating efficiency is high, the anti-icing effect is good, and it does not affect the thermal efficiency of the engine; there is no need to bleed air from the outside of the engine, which does not affect the thermal efficiency of the engine, and at the same time, the rotational energy of the fan blade disk 4 is recovered, and the resource utilization rate is high; the present invention also controls the intensity of heating at the anti-icing position through the setting of the detection control system, performs targeted anti-icing, has better energy saving, and can basically avoid local thermal shock to the parts, thereby avoiding affecting the reliability of the parts.

[0036] Preferably, in the step "When the detection and control system detects that the temperature value of one or more anti-icing positions is lower than the system set temperature value, the permanent magnet heating component is turned on and started, and the detection and control system distributes the electric energy generated by the permanent magnet power generation component to the corresponding electric heating wire 11 according to the temperature value of each anti-icing position", if the detection and control system detects that the temperature value of some anti-icing positions is higher than the system set temperature value, the detection and control system controls the permanent magnet heating component to reduce the power generation power accordingly. In actual operation, the detection and control system can simultaneously open multiple coil rings to increase the power generation of the permanent magnet power generation component, or close one or more coil rings to reduce the power generation of the permanent magnet power generation component according to the actual temperature of the detected anti-icing position, thereby saving energy to the greatest extent, and at the same time, the detection and control system can reasonably allocate energy.

[0037] The specific working process of the turbofan engine electric heating anti-icing method of the present invention is as follows: The engine start-up drives the fan blade disc 4 to rotate. When the detector 16 detects that the temperature values ​​of each anti-icing position are higher than the system set temperature value, the controller 14 does not receive the anti-icing signal, and the generator coil 13 remains disconnected. When the engine continues to work, when the detector 16 detects that the temperature value of one or more anti-icing positions is lower than the system set temperature value, the controller 14 receives the anti-icing signal, and the controller 14 closes the switch of the generator coil 13, and the generator coil 13 starts to generate electricity. At the same time, the distributor 15 reasonably distributes the electric energy to the heating wires 11 of all the anti-icing positions that need anti-icing, so that the heating wires 11 start to work. After a period of anti-icing, when the controller 14 does not receive a partial cancellation of anti-icing demand, the generator coil 13 maintains power and the distributor 15 maintains the original power distribution mode; when the controller 14 receives a partial cancellation of anti-icing demand, the power generation of the generator coil 13 is reduced, and the distributor 15 cancels the operation of the designated heating wire 11; after a period of anti-icing, when the controller 14 does not receive a full cancellation of anti-icing demand, the controller continues to determine whether it has received a partial cancellation of anti-icing demand and guides the corresponding operation. When the controller 14 receives a full cancellation of anti-icing operation, the generator coil 13 is controlled to be completely disconnected, and anti-icing is completed. The entire anti-icing control process has a high degree of automation and saves energy to the greatest extent.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electric heating anti-icing structure for a turbofan engine, comprising a fan blade disk (4) fixedly mounted on the outer circumference of a core shaft (3), a bearing seat (5) sleeved on the outer circumference of the core shaft (3), an inner rectifier sleeved outside the bearing seat (5), an outer rectifier sleeved outside the inner rectifier, and a flow divider casing sleeved on the outer circumference of the core shaft (3), characterized in that: The turbofan engine electric heating anti-icing structure also includes an electric heating anti-icing assembly (1) for generating electricity, heating and anti-icing, the electric heating anti-icing assembly (1) including a permanent magnet power generation component, a detection and control system and a plurality of electric heating wires (11) connected in sequence; The permanent magnet power generation component is separately arranged on the fan blade disc (4) and the bearing seat (5), or separately arranged on the fan blade disc (4) and the inner rectifier, or separately arranged on the fan blade disc (4) and the outer rectifier, so as to generate electric energy during the rotation of the fan blade disc (4); A plurality of electric heating wires (11) are arranged at anti-icing positions in the inner rectifier, the outer rectifier and the shunt casing where heating and anti-icing are required; The detection control system is used to detect the temperature value of each anti-icing position, and distribute the electric energy generated by the permanent magnet power generation component to the corresponding heating wire (11) according to the temperature value.

2. The turbofan engine electric heating anti-icing structure according to claim 1, characterized in that: The permanent magnet power generation component comprises an annular permanent magnet ring (12) and an annular power generation coil (13); The permanent magnet ring (12) is connected to the rotor mounting interface (401) of the fan blade disk (4); The generating coil (13) is connected to the inner ring mounting interface (610) of the inner rectifier inner ring (61) of the inner rectifier, or is connected to the bearing seat mounting interface (501) of the bearing seat (5), and the generating coil (13) is connected to the detection and control system, and the permanent magnet ring (12) and the generating coil (13) are both located in a hollow cavity formed by the fan blade disk (4), the bearing seat (5) and the inner rectifier inner ring (61).

3. The turbofan engine electric heating anti-icing structure according to claim 2, characterized in that: The generating coil (13) comprises a plurality of coil rings, each of which is provided with a control switch for controlling the on and off of the coil ring, and each control switch is respectively connected to a detection control system.

4. The turbofan engine electric heating anti-icing structure according to claim 2, characterized in that: The detection control system comprises a controller (14) connected to the power generation coil (13), a distributor (15) connected to the controller (14), and a plurality of detectors (16) for detecting the temperature of the anti-icing position; A plurality of detectors (16) are disposed at each anti-icing position and are respectively connected to the controller (14) so ​​as to feed back the temperature value of the corresponding anti-icing position to the controller (14); The distributor (15) is respectively connected to a plurality of heating wires (11) so as to distribute corresponding electric energy to corresponding heating wires (11) under the control of the controller (14).

5. The turbofan engine electric heating anti-icing structure according to claim 4, characterized in that: The controller (14) is located in the hollow cavity and is connected to the bearing seat mounting interface (501) or the inner ring mounting interface (610); The distributor (15) is connected to the flow dividing cone (9) formed between the outer rectifier and the inner ring rectifier.

6. The turbofan engine electric heating anti-icing structure according to claim 1, characterized in that: A plurality of electric heating wires (11) on the outer duct rectifier are embedded one by one in a plurality of outer duct rectifier blades (71) of the outer duct rectifier; A plurality of electric heating wires (11) on the internal rectifier are embedded one by one in a plurality of internal rectifier blades (62) of the internal rectifier; A plurality of electric heating wires (11) on the flow splitter casing are embedded one by one in a plurality of inner duct support plates (81) of the flow splitter casing, or are embedded one by one in a plurality of inner duct support plates (81) and a plurality of outer duct support plates (82) of the flow splitter casing; A plurality of electric heating wires (11) are also buried in the shunt cone (9) between the outer rectifier and the inner rectifier and are arranged in sequence and at intervals along the circumferential direction.

7. The turbofan engine electric heating anti-icing structure according to claim 4, characterized in that: The plurality of detectors (16) on the outer rectifier and the plurality of detectors (16) on the inner rectifier are arranged at even intervals along the circumferential direction; A plurality of detectors (16) on the flow splitter casing are evenly arranged along the circumference of the inner channel support plate (81) of the flow splitter casing for detection, or are evenly arranged along the circumference of the inner channel support plate (81) and the outer channel support plate (82) of the flow splitter casing for detection; A plurality of detectors (16) are evenly spaced in the circumferential direction of the flow splitting cone (9) between the outer rectifier and the inner rectifier.

8. The turbofan engine electric heating anti-icing structure according to claim 7, characterized in that: A detector (16) is also provided at the inlet of the engine.

9. A turbofan engine electric heating anti-icing method, characterized in that: The turbofan engine electric heating anti-icing structure according to any one of claims 1 to 8 comprises the following steps: When the detection control system detects that the temperature value of each anti-icing position is higher than the system set temperature value, the permanent magnetic heating component remains disconnected; When the detection and control system detects that the temperature value of one or more anti-icing positions is lower than the system set temperature value, the permanent magnet heating component is turned on and started, and the detection and control system distributes the electric energy generated by the permanent magnet power generation component to the corresponding electric heating wire (11) according to the temperature value of each anti-icing position; When the detection control system detects that the temperature values ​​of all anti-icing positions are higher than the system set temperature value, the permanent magnetic heating component is disconnected and the anti-icing ends.

10. The turbofan engine electric thermal anti-icing method according to claim 9, characterized in that: In the step "when the detection and control system detects that the temperature value of one or more anti-icing positions is lower than the system set temperature value, the permanent magnet heating component is turned on and started, and the detection and control system distributes the electric energy generated by the permanent magnet power generation component to the corresponding heating wire (11) according to the temperature value of each anti-icing position", if the detection and control system detects that the temperature value of some anti-icing positions is higher than the system set temperature value, the detection and control system controls the permanent magnet heating component to reduce the power generation accordingly.

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