CN116398384A - Simulation device for nondestructive rapid deicing of fan blade - Google Patents
Simulation device for nondestructive rapid deicing of fan blade Download PDFInfo
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- CN116398384A CN116398384A CN202310430907.0A CN202310430907A CN116398384A CN 116398384 A CN116398384 A CN 116398384A CN 202310430907 A CN202310430907 A CN 202310430907A CN 116398384 A CN116398384 A CN 116398384A
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- 238000004088 simulation Methods 0.000 title claims abstract description 14
- 230000035939 shock Effects 0.000 claims abstract description 47
- 239000007921 spray Substances 0.000 claims abstract description 20
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 15
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 15
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 15
- 239000003990 capacitor Substances 0.000 claims description 95
- 238000004146 energy storage Methods 0.000 claims description 39
- 238000007599 discharging Methods 0.000 claims description 32
- 210000002381 plasma Anatomy 0.000 claims description 28
- 238000002347 injection Methods 0.000 claims description 14
- 239000007924 injection Substances 0.000 claims description 14
- 230000010354 integration Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 238000002679 ablation Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 229910001369 Brass Inorganic materials 0.000 claims description 3
- 239000010951 brass Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 238000007750 plasma spraying Methods 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000000576 coating method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/40—Ice detection; De-icing means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention relates to a simulation device for nondestructive rapid deicing of a fan blade, which comprises a self-controllable charge-discharge loop, a trigger-discharge loop and a jet array integrated device, wherein the jet array integrated device is formed by arranging a plurality of shock wave jet cavities in a dense array mode; the shock wave jet flow cavity is of a two-stage along surface continuous structure and consists of a primary cavity and a secondary cavity, wherein the primary cavity consists of a needle electrode, polytetrafluoroethylene and an intermediate electrode, and the secondary cavity consists of an intermediate electrode, polytetrafluoroethylene and a ground electrode. The invention adopts a deicing mode based on plasma spraying to crush the ice layer at the designated position. The shock wave jet cavity can repeatedly and continuously spray deicing in a short time, and the damage to the fan blade is avoided based on the heat transfer of plasma and the rapid deicing of the shock wave effect.
Description
Technical Field
The invention relates to the technical field of pulse power plasma application, in particular to a simulation device for nondestructive rapid deicing of a fan blade.
Background
Wind power generators are important power equipment for converting wind energy into mechanical energy and converting mechanical energy into electric energy, and are increasingly widely applied to the days of increasingly depleted energy sources. However, in winter every year, when the fan runs under the low-temperature condition, if the fan encounters rain, ice and snow and other weather, an ice layer is formed on the surface of the blade, and particularly the situation of icing from the middle part of the blade to the blade tip is more serious. The attached ice layer increases the blade load, affects its aerodynamic characteristics, and causes a decrease in its power generation efficiency, even when it is stopped. Therefore, there is a need for deicing fan blades.
The existing deicing technology mainly comprises a coating method, an electric heating method, a mechanical deicing method and the like, wherein the coating method is simple to operate, but generally resistant to Hou Xingcha, and has a weakened ice coating effect and cannot be recovered; the electric heating method has good deicing effect, but has high energy consumption and high running cost; traditional mechanical deicing needs to be carried out manually to knock the blade to remove ice, and the deicing effect is poor and the blade is easy to damage. Therefore, development of a deicing method for avoiding damage to fan blades and ensuring normal operation of a fan is urgently needed.
Disclosure of Invention
In order to solve the problems of damage to fan blades, poor deicing effect and the like in the traditional deicing mode, the invention aims to provide a simulation device for nondestructive rapid deicing of fan blades, which can avoid damage to the fan blades and has excellent deicing effect.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the simulation device comprises a self-controllable charging and discharging loop for controlling automatic charging and discharging of a capacitor, a trigger discharging loop for releasing energy to ablate polytetrafluoroethylene, and an injection array integrated device formed by arranging a plurality of shock wave jet cavities in a dense array mode, wherein a single shock wave jet cavity in the injection array integrated device is clamped by a self-adaptive screwing clamping device, and anti-buckling arm devices for moving along the fan blade are arranged around the injection array integrated device; the shock wave jet flow cavity is of a two-stage along surface continuous structure and consists of a primary cavity and a secondary cavity, wherein the primary cavity consists of a needle electrode, polytetrafluoroethylene and an intermediate electrode, and the secondary cavity consists of an intermediate electrode, polytetrafluoroethylene and a ground electrode.
The self-controllable charge-discharge loop comprises an energy storage capacitor C 1 Self-controllable charge-discharge loop and pulse capacitor C 2 A self-controllable charge-discharge circuit; wherein the energy storage capacitor C 1 Self-controllable charge-discharge loop of (C) is formed by an energy storage capacitor C 1 The power-on relay comprises a first power-on delay relay KT1, a first power-off delay relay KT2 and a first intermediate relay KM1, wherein one normally open contact of the first power-off delay relay KT2 is connected with a coil of the first power-on delay relay coil KT1 to form a control loop, and the other normally open contact of the first power-off delay relay KT2 is sequentially connected with a normally open contact K1 and an energy storage capacitor C of the first intermediate relay KM1 1 The anode of the capacitor is connected to form a capacitor charging loop, and the energy storage capacitor C 1 The other end of the first electrode is grounded; the normally closed contact of the first power-on delay relay KT1 is sequentially connected with the coil of the first intermediate relay KM1 and the coil of the first power-off delay relay KT2 to form a control loop;
the pulse capacitor C 2 Self-controllable charge-discharge loop route pulse capacitor C 2 The control circuit comprises a second power-on delay relay KT3, a second power-off delay relay KT4 and a second intermediate relay KM2, wherein one normally open contact of the second power-off delay relay KT4 is connected with a coil of the second power-on delay relay coil KT3 to form a control loop, and the other normally open contact of the second power-off delay relay KT4 is sequentially connected with a normally open contact K2 and a pulse capacitor C of the second intermediate relay KM2 2 The anode of the capacitor is connected to form a capacitor charging loop, and the pulse capacitor C 1 The other end of the first electrode is grounded; the normally closed contact of the second power-on delay relay KT3 is sequentially connected with the coil of the second intermediate relay KM2 and the coil of the second power-off delay relay KT4 to form a control loop;
energy storage capacitor C 1 Self-controllable charge-discharge loop and pulse capacitor C 2 The self-controllable charging and discharging loop of the (1) is connected with an electrifying button SB1 and an emergency stop button SB2, and is used for guaranteeing the safety of the charging and discharging process of the control loop; the control loop gives out an action signal to sequentially control the energy storage capacitor C 1 Pulse capacitor C 2 Discharging, energy storage capacitor C 1 Pulse capacitor C 2 The stored large amount of energy causes the polytetrafluoroethylene in the jet cavity of the shock wave to be dissociated to form plasma, and the plasma is accumulated in the jet cavity in a large amount and then is dischargedThe jet hole is sprayed out at high air pressure and high speed.
The trigger discharge circuit consists of a pulse circuit and a discharge circuit, and the pulse circuit consists of a pulse capacitor C 2 Pulse transformer T and thyristor SCR 2 Diode D and protection resistor R 2 Composition, pulse capacitor C 2 Is connected with the primary coil T of the pulse transformer T 1 A terminal of (C), pulse capacitor C 2 The other end of the diode D is grounded and connected with the primary coil T of the pulse transformer T 1 The anode of the diode D is grounded, and the thyristor SCR is connected with the terminal b of the diode D 2 The positive pole of the pulse transformer T is connected with the primary coil T of the pulse transformer T 1 B terminal of thyristor SCR 2 The cathode of the diode D is connected with the anode of the diode D and then grounded, and the resistor R is protected 2 A secondary coil T connected with the pulse transformer T at one end 2 B terminal of (2), protection resistor R 2 The other end of the pulse transformer T is grounded, and the secondary coil T of the pulse transformer T 2 The end a of the jet flow chamber is connected with a needle electrode of the shock wave jet flow chamber; the discharging loop is formed by an energy storage capacitor C 1 Thyristor SCR 1 Discharge resistor R 1 Composition, storage capacitor C 1 One end of (a) is connected with a thyristor SCR 1 Is the anode of the energy storage capacitor C 1 Is grounded at the other end of the thyristor SCR 1 The cathode of the (C) is respectively connected with the intermediate electrode and the discharge resistor R of the shock wave jet cavity 1 One end of (1) is connected with a discharge resistor R 1 The other end of the jet cavity is connected with a ground electrode of the shock wave jet cavity; the thyristor SCR 1 、SCR 2 Receiving trigger signal, thyristor SCR 2 After receiving the trigger signal, the pulse capacitor C is controlled 2 Discharging, namely generating high-voltage pulse through a pulse transformer T, applying the high-voltage pulse to a needle electrode of a shock wave jet cavity, and discharging into a primary cavity of the shock wave jet cavity to form a pre-ionization channel; thyristor SCR 1 After receiving the trigger signal, the energy storage capacitor C is controlled 1 Discharging, quickly ablating gas-generating material to generate plasma, accumulating a large amount of plasma in the injection cavity, and then spraying the plasma at high pressure and high speed at the injection hole.
The height of the surface of the primary cavity between the needle electrode and the middle electrode is 3mm, the inner diameter of the primary cavity is 2mm, the height of the surface of the secondary cavity between the middle electrode and the ground electrode is 6mm, the inner diameter of the secondary cavity is 2mm, the device is tightly pressed in a cylindrical sleeve shape to form a shock wave jet cavity, the needle electrode, the middle electrode and the ground electrode are all made of brass, and the center of the middle electrode and the center of the ground electrode are nozzles with the diameter of 2 mm.
The self-adaptive screwing clamping device is composed of a base, a self-adaptive screwing arm and a cavity clamp, the self-adaptive screwing arm is integrated on the base in a 120-degree equidistant distribution mode, the self-adaptive screwing arm comprises a first large arm, a first rotating shaft, a first rotating arm, a second rotating shaft and a second rotating arm, one end of the first large arm is fixedly arranged on the base, the other end of the first large arm is hinged to one end of the first rotating arm in an inclined mode through the first rotating shaft, the other end of the first rotating arm is hinged to one end of the second rotating arm in an upward mode through the second rotating shaft, the other end of the second rotating arm is fixedly arranged on the cavity clamp for clamping a single shock wave jet flow cavity, and the base is fixedly arranged at the bottom of the jet array integrating device.
The back-buckling arm device consists of four back-buckling arms which are symmetrically distributed on two sides of the spray array integrated device, the spray array integrated device is in a box body shape, the back-buckling arms consist of a second large arm, a telescopic arm, a third rotating shaft, a third rotating arm, a fourth rotating shaft, a fourth rotating arm, rollers and rollers, one end of the second large arm is welded on the box body of the spray array integrated device, the other end of the second large arm is provided with a telescopic arm which can stretch up and down upwards, the other end of the telescopic arm is hinged with one end of the third rotating arm upwards through the third rotating shaft, the other end of the third rotating arm is hinged with one end of the fourth rotating arm through the fourth rotating shaft, the other end of the fourth rotating arm is provided with rollers, and the two ends of the rollers are provided with rollers.
According to the technical scheme, the beneficial effects of the invention are as follows: firstly, the invention can realize the automatic injection control and single action time interval control of the shock wave jet cavity through the self-controllable charge-discharge loop formed by time sequence coordination of the time relay, the intermediate relay and the like; secondly, the invention is based on the technology of generating plasmas by discharge ablation in the field of pulse power, and the plasmas generated by discharge ablation are accumulated in a microcavity to form high-temperature and high-speed jet plasma jet, the deicing time continuously acts on the blade within a sub ms, the damage to the blade is avoided, and the single action time interval is within 20 seconds; thirdly, the spray array integrated device can perform single or multiple, annular or square concentrated spraying according to control requirements, and has excellent deicing effect.
Drawings
FIG. 1 is a circuit diagram of a self-controllable charge-discharge circuit according to the present invention;
FIG. 2 is a circuit diagram of a trigger discharge circuit according to the present invention;
FIG. 3 is a cross-sectional view of a shock wave jet cavity in accordance with the present invention;
FIG. 4 is a schematic structural view of an adaptive screw clamping device according to the present invention;
FIG. 5 is a schematic view of the structure of the back-latch arm device according to the present invention;
FIG. 6 is a schematic diagram of the spray array assembly and the back-latch arm assembly of the present invention;
fig. 7 is a schematic diagram of an installation simulation of the present invention.
Detailed Description
As shown in fig. 1, 2, 3, 6 and 7, a simulation device for nondestructive rapid deicing of fan blades comprises a self-controllable charging and discharging loop for controlling automatic charging and discharging of a capacitor, a trigger discharging loop for releasing energy ablation polytetrafluoroethylene 8 and a jet array integrated device 28 formed by arranging a plurality of shock wave jet cavities 10 in a dense array form, wherein a single shock wave jet cavity 10 in the jet array integrated device 28 is clamped by a self-adaptive screwing clamping device 18, and a back buckling arm device 27 for moving along the fan blades is arranged around the jet array integrated device 28; the shock wave jet flow cavity 10 is of a two-stage surface connection type structure and consists of a primary cavity 7 and a secondary cavity 5, wherein the primary cavity 7 consists of a needle electrode 9, polytetrafluoroethylene 8 and an intermediate electrode 6, and the secondary cavity 5 consists of the intermediate electrode 6, polytetrafluoroethylene 8 and a ground electrode 4.
As shown in fig. 1, the self-controllable charge-discharge loop includes an energy storage capacitor C 1 Self-controllable charge-discharge loop and pulse capacitor C 2 A self-controllable charge-discharge circuit; wherein the saidEnergy storage capacitor C 1 Self-controllable charge-discharge loop of (C) is formed by an energy storage capacitor C 1 The power-on relay comprises a first power-on delay relay KT1, a first power-off delay relay KT2 and a first intermediate relay KM1, wherein one normally open contact of the first power-off delay relay KT2 is connected with a coil of the first power-on delay relay coil KT1 to form a control loop, and the other normally open contact of the first power-off delay relay KT2 is sequentially connected with a normally open contact K1 and an energy storage capacitor C of the first intermediate relay KM1 1 The anode of the capacitor is connected to form a capacitor charging loop, and the energy storage capacitor C 1 The other end of the first electrode is grounded; the normally closed contact of the first power-on delay relay KT1 is sequentially connected with the coil of the first intermediate relay KM1 and the coil of the first power-off delay relay KT2 to form a control loop;
the pulse capacitor C 2 Self-controllable charge-discharge loop route pulse capacitor C 2 The control circuit comprises a second power-on delay relay KT3, a second power-off delay relay KT4 and a second intermediate relay KM2, wherein one normally open contact of the second power-off delay relay KT4 is connected with a coil of the second power-on delay relay coil KT3 to form a control loop, and the other normally open contact of the second power-off delay relay KT4 is sequentially connected with a normally open contact K2 and a pulse capacitor C of the second intermediate relay KM2 2 The anode of the capacitor is connected to form a capacitor charging loop, and the pulse capacitor C 1 The other end of the first electrode is grounded; the normally closed contact of the second power-on delay relay KT3 is sequentially connected with the coil of the second intermediate relay KM2 and the coil of the second power-off delay relay KT4 to form a control loop;
energy storage capacitor C 1 Self-controllable charge-discharge loop and pulse capacitor C 2 The self-controllable charging and discharging loop of the (1) is connected with an electrifying button SB1 and an emergency stop button SB2, and is used for guaranteeing the safety of the charging and discharging process of the control loop; the control loop gives out an action signal to sequentially control the energy storage capacitor C 1 Pulse capacitor C 2 Discharging, energy storage capacitor C 1 Pulse capacitor C 2 The stored large amount of energy causes the polytetrafluoroethylene 8 in the shock wave jet cavity 10 to be dissociated to form plasma, and the plasma is accumulated in the jet cavity in a large amount and then is ejected at high pressure and high speed at the jet hole.
As shown in FIG. 2, aThe trigger discharge loop consists of a pulse loop 1 and a discharge loop 2, wherein the pulse loop 1 consists of a pulse capacitor C 2 Pulse transformer T and thyristor SCR 2 Diode D and protection resistor R 2 Composition, pulse capacitor C 2 Is connected with the primary coil T of the pulse transformer T 1 A terminal of (C), pulse capacitor C 2 The other end of the diode D is grounded and connected with the primary coil T of the pulse transformer T 1 The anode of the diode D is grounded, and the thyristor SCR is connected with the terminal b of the diode D 2 The positive pole of the pulse transformer T is connected with the primary coil T of the pulse transformer T 1 B terminal of thyristor SCR 2 The cathode of the diode D is connected with the anode of the diode D and then grounded, and the resistor R is protected 2 A secondary coil T connected with the pulse transformer T at one end 2 B terminal of (2), protection resistor R 2 The other end of the pulse transformer T is grounded, and the secondary coil T of the pulse transformer T 2 The end a of the (a) is connected with a needle electrode 9 of a shock wave jet cavity 10; the discharging loop 2 is formed by an energy storage capacitor C 1 Thyristor SCR 1 Discharge resistor R 1 Composition, storage capacitor C 1 One end of (a) is connected with a thyristor SCR 1 Is the anode of the energy storage capacitor C 1 Is grounded at the other end of the thyristor SCR 1 The cathode of the (C) is respectively connected with the intermediate electrode 6 and the discharge resistor R of the shock wave jet cavity 10 1 One end of (1) is connected with a discharge resistor R 1 The other end of the (2) is connected with the ground electrode (4) of the shock wave jet cavity (10); the thyristor SCR 1 、SCR 2 Receiving trigger signal, thyristor SCR 2 After receiving the trigger signal, the pulse capacitor C is controlled 2 Discharging, namely generating high-voltage pulse through a pulse transformer T, applying the high-voltage pulse to a needle electrode 9 of a shock wave jet cavity 10, and discharging into a primary cavity 7 of the shock wave jet cavity 10 to form a pre-ionization channel; thyristor SCR 1 After receiving the trigger signal, the energy storage capacitor C is controlled 1 Discharging, quickly ablating gas-generating material to generate plasma, accumulating a large amount of plasma in the injection cavity, and then spraying the plasma at high pressure and high speed at the injection hole.
As shown in fig. 3, the height of the surface of the primary cavity 7 between the needle electrode 9 and the middle electrode 6 is 3mm, the inner diameter is 2mm, the height of the surface of the secondary cavity 5 between the middle electrode 6 and the ground electrode 4 is 6mm, the inner diameter is 2mm, the device is tightly pressed in a cylindrical sleeve shape to form a shock wave jet cavity 10, the needle electrode 9, the middle electrode 6 and the ground electrode 4 are all made of brass, and the center of the middle electrode 6 and the ground electrode 4 is provided with a nozzle 3 with the diameter of 2 mm.
As shown in fig. 4, the self-adaptive screwing and clamping device 18 is composed of a base 11, a self-adaptive screwing arm and a cavity clamp 17, the self-adaptive screwing arm is integrated on the base 11 in an equidistant distribution mode at 120 ° intervals, the self-adaptive screwing arm comprises a first big arm 12, a first rotating shaft 13, a first rotating arm 14, a second rotating shaft 15 and a second rotating arm 16, one end of the first big arm 12 is fixedly arranged on the base 11, the other end of the first big arm 12 is hinged with one end of the first rotating arm 14 through the first rotating shaft 13 in an inclined upward direction, the other end of the first rotating arm 14 is hinged with one end of the second rotating arm 16 through the second rotating shaft 15 in an upward direction, the other end of the second rotating arm 16 is fixedly arranged on the cavity clamp 17 for clamping a single shock wave jet flow cavity 10, and the base 11 is fixedly arranged at the bottom of the jet array integration device 28. The self-adaptive screwing arms are integrated on the base 11 at intervals of 120 DEG in an equidistant mode, and each self-adaptive screwing arm is provided with three rotating shafts so as to realize free expansion and contraction of the first rotating arm 14, the second rotating arm 16 and the cavity clamp 17, and the distances in the directions of all degrees of freedom can be independently adjusted.
As shown in fig. 5, the back-buckling arm device 27 is composed of four back-buckling arms symmetrically distributed on two sides of the spray array integration device 28, the spray array integration device 28 is in a box shape, the back-buckling arms are composed of a second big arm 19, a telescopic arm 20, a third rotating shaft 21, a third rotating arm 22, a fourth rotating shaft 23, a fourth rotating arm 24, a roller 26 and a roller 25, one end of the second big arm 19 is welded on the box of the spray array integration device 28, the telescopic arm 20 which can stretch up and down is arranged at the other end of the second big arm 19, the other end of the telescopic arm 20 is hinged with one end of the third rotating arm 22 through the third rotating shaft 21, the other end of the third rotating arm 22 is hinged with one end of the fourth rotating arm 24 through the fourth rotating shaft 23, the roller 25 is arranged at the other end of the fourth rotating arm 24, and the roller 26 is arranged at two ends of the roller 25. The telescopic arm 20 can be telescopic up and down, and is assisted by a rotating arm and a rotating shaft to adjust and adapt to different blade sizes, the front end of the telescopic arm is provided with a roller 25, and the two ends of the telescopic arm are provided with rollers 26 to roll along the blades to move the device.
The single shock wave jet cavity 10 is distributed in a space of 5 x 15 cm; the plurality of shock wave jet flow cavities 10 are sequentially arranged to form a dense array on a single surface; the single shock wave jet flow cavity 10 in the device is clamped by the self-adaptive screwing arm, the distance between the jet opening 3 and the ice surface can be independently adjusted under the action of the stepping motor, the six-direction freedom degree is adjustable up and down, left and right and front and back, the direction of the jet opening 3 can be adaptively adjusted to enable plasma jet flows to be converged, the same point is acted together, and the distance between the jet opening 3 and the impact surface can be independently adjusted; the spray array integration device 28 may be controlled for single or multiple, synchronous or asynchronous, centralized or decentralized spraying depending on the control requirements; the counter-buckling arm device 27 can be stretched up and down and left and right to adapt to different sizes of the blades, and the roller 26 can move along the blades while reducing abrasion to the blades.
The invention is further described below with reference to fig. 1 to 7.
By an energy-storage capacitor C 1 For example, the power-on button SB1 is pressed at the beginning: the coil of the first intermediate relay KM1 and the coil of the first power-off delay relay KT2 are powered on, the normally open contact K1 of the first intermediate relay KM1 is closed, the two normally open contacts of the first power-off delay relay KT2 are closed, and the energy storage capacitor C is powered on at the moment 1 Charging is started. After the coil of the first power-on delay relay KT1 is powered on, the coil is subjected to a preset delay t c1 After that, the normally closed contact of the first electrifying delay relay KT1 is opened and the normally open contact is closed, and at the moment, the energy storage capacitor C 1 Charging to a preset voltage. The coil of the first intermediate relay KM1 and the coil of the first power-off delay relay KT2 are powered off, the normally open contact K1 is reset, and the energy storage capacitor C 1 The charging circuit is disconnected and a preset delay T (from C 1 、C 2 The time required for charging to the preset voltage and the adjacent 2 times of action intervals are formed, 20s is set in the device), the control loop gives an action instruction, and the control loop sequentially controls C 2 、C 1 And (5) discharging.
Firstly, a control loop gives out an action signal to trigger a thyristor SCR 2 Pulse capacitor C 2 Discharge, viaSecondary winding T of over-pulse transformer T 2 A high voltage pulse is applied to the needle electrode 9 to cause the polytetrafluoroethylene 8 insulating material between the needle electrode 9 and the intermediate electrode 6 to flashover along the surface to form a pre-ionization channel. At this time, energy storage capacitor C 1 Preionization channel, needle electrode 9, secondary coil T of pulse transformer T through primary cavity 7 2 Resistance R 2 And (5) discharging. Because the pulse transformer outputs high-voltage pulse, the iron core is not saturated, which is equivalent to a large inductance, the value of the exciting inductance is larger, the energy release of the capacitance is slow, and the current coupled from the primary side to the secondary side of the pulse transformer is small. At this time, the amount of plasma generated by the surface pulse discharge is small, and is insufficient to move upward beyond the intermediate electrode into the secondary cavity, causing distortion of the electric field in the secondary cavity. With the action of the externally applied voltages at the two ends of the pulse, the pulse-to-volt-second product is increased to cause the iron core to be gradually saturated, the exciting inductance value is reduced to some extent, and the energy storage capacitor C 1 Part of the energy can be released quickly, but due to inductance and discharge resistance R 2 The discharge current is still small. At this stage, a small amount of plasma is generated by ablation, and under the action of electric field force and pneumatic force in the cavity, the surface between the middle electrode 6 and the ground electrode 4 is shorted along the triggering channel, so that a discharging channel penetrating through the triggering cavity is formed. At this time, energy storage capacitor C 1 The plasma in the intermediate electrode 6 and the secondary cavity 5 and the ground electrode 4 form a main discharge channel, and the peak value of the current reaches the kA level. Along with the injection of the triggering energy, the discharge channel rapidly expands, and high shock wave pressure is generated in the sealed micro discharge cavity; meanwhile, the secondary cavity 5 insulating gas-generating material is ablated violently along the surface arc, a large amount of plasmas can be formed within hundred mu s rapidly, so that the air pressure in the triggering cavity rises sharply, a high-temperature, high-air pressure and high-speed jet plasma jet can be formed at the nozzle 3 rapidly, the instantaneous temperature of the plasmas can reach 800-1000K, and the impact force at the nozzle 3 can reach MN grade. The plurality of shock wave jet cavities 10 are integrated and arranged in an array form to form a device, action signals are synchronously given, and a plurality of plasma jet flows are simultaneously sprayed in a short time and jointly act on the blade ice layer. The single shock wave jet cavity 10 in the device can also independently adjust the distance between the nozzle 3 and the ice surface to perform concentrated or divergent jet, for example, when ice is at a single pointWhen the layer is thicker, the angles of a plurality of surrounding shock wave jet cavities 10 can be adjusted, and a plurality of plasma jet flows are converged to one point together for centralized crushing. And the spray array can be controlled to spray one circle from inside to outside, and spray one circle of annular spray and spray square in a certain area. The back-buckling arm devices 27 around the spray array integration device 28 can freely stretch up and down and left and right to adapt to different positions of the blades, and the rollers 26 on the back-buckling arm devices 27 can be controlled to move the spray array integration device 28.
In summary, the deicing method based on plasma spraying is adopted, and the characteristic that plasma generated by the ablation capillary tube in hundreds of mu s rapidly has high-temperature and high-speed spraying is utilized to break the ice layer at the designated position. The shock wave jet cavity 10 can repeatedly and continuously spray ice removal in a short time, the duration of the spraying plasma is in the sub ms, and the ice removal is fast based on the heat transfer of the plasma and the shock wave action, so that the damage to the fan blade is avoided, and the invention can provide a new solution to the ice removal problem of the fan blade.
Claims (6)
1. A simulation device for nondestructive rapid deicing of fan blades is characterized in that: comprises an automatic controllable charging and discharging loop for controlling the automatic charging and discharging of a capacitor, a triggering and discharging loop for releasing energy to ablate polytetrafluoroethylene (8), and a jet array integrated device (28) formed by arranging a plurality of shock wave jet cavities (10) in a dense array form, a single shock wave jet flow cavity (10) in the jet array integrated device (28) is clamped by the self-adaptive screwing clamping device (18), and a back buckling arm device (27) for moving along the fan blade is arranged around the jet array integrated device (28); the shock wave jet flow cavity (10) is of a two-stage along-surface continuous structure and consists of a primary cavity (7) and a secondary cavity (5), wherein the primary cavity (7) consists of a needle electrode (9), polytetrafluoroethylene (8) and an intermediate electrode (6), and the secondary cavity (5) consists of the intermediate electrode (6), polytetrafluoroethylene (8) and a ground electrode (4).
2. The fan blade nondestructive rapid deicing simulation apparatus as set forth in claim 1, wherein: the self-cocoaThe charge-discharge control loop comprises an energy storage capacitor C 1 Self-controllable charge-discharge loop and pulse capacitor C 2 A self-controllable charge-discharge circuit; wherein the energy storage capacitor C 1 Self-controllable charge-discharge loop of (C) is formed by an energy storage capacitor C 1 The power-on relay comprises a first power-on delay relay KT1, a first power-off delay relay KT2 and a first intermediate relay KM1, wherein one normally open contact of the first power-off delay relay KT2 is connected with a coil of the first power-on delay relay coil KT1 to form a control loop, and the other normally open contact of the first power-off delay relay KT2 is sequentially connected with a normally open contact K1 and an energy storage capacitor C of the first intermediate relay KM1 1 The anode of the capacitor is connected to form a capacitor charging loop, and the energy storage capacitor C 1 The other end of the first electrode is grounded; the normally closed contact of the first power-on delay relay KT1 is sequentially connected with the coil of the first intermediate relay KM1 and the coil of the first power-off delay relay KT2 to form a control loop;
the pulse capacitor C 2 Self-controllable charge-discharge loop route pulse capacitor C 2 The control circuit comprises a second power-on delay relay KT3, a second power-off delay relay KT4 and a second intermediate relay KM2, wherein one normally open contact of the second power-off delay relay KT4 is connected with a coil of the second power-on delay relay coil KT3 to form a control loop, and the other normally open contact of the second power-off delay relay KT4 is sequentially connected with a normally open contact K2 and a pulse capacitor C of the second intermediate relay KM2 2 The anode of the capacitor is connected to form a capacitor charging loop, and the pulse capacitor C 1 The other end of the first electrode is grounded; the normally closed contact of the second power-on delay relay KT3 is sequentially connected with the coil of the second intermediate relay KM2 and the coil of the second power-off delay relay KT4 to form a control loop;
energy storage capacitor C 1 Self-controllable charge-discharge loop and pulse capacitor C 2 The self-controllable charging and discharging loop of the (1) is connected with an electrifying button SB1 and an emergency stop button SB2, and is used for guaranteeing the safety of the charging and discharging process of the control loop; the control loop gives out an action signal to sequentially control the energy storage capacitor C 1 Pulse capacitor C 2 Discharging, energy storage capacitor C 1 Pulse capacitor C 2 The stored large amount of energy causes the polytetrafluoroethylene (8) in the shock wave jet cavity (10) to dissociate to form plasmaThe plasma is accumulated in a large amount in the injection cavity and then is sprayed out at high pressure and high speed at the injection hole.
3. The fan blade nondestructive rapid deicing simulation apparatus as set forth in claim 1, wherein: the trigger discharge circuit consists of a pulse circuit (1) and a discharge circuit (2), wherein the pulse circuit (1) consists of a pulse capacitor C 2 Pulse transformer T and thyristor SCR 2 Diode D and protection resistor R 2 Composition, pulse capacitor C 2 Is connected with the primary coil T of the pulse transformer T 1 A terminal of (C), pulse capacitor C 2 The other end of the diode D is grounded and connected with the primary coil T of the pulse transformer T 1 The anode of the diode D is grounded, and the thyristor SCR is connected with the terminal b of the diode D 2 The positive pole of the pulse transformer T is connected with the primary coil T of the pulse transformer T 1 B terminal of thyristor SCR 2 The cathode of the diode D is connected with the anode of the diode D and then grounded, and the resistor R is protected 2 A secondary coil T connected with the pulse transformer T at one end 2 B terminal of (2), protection resistor R 2 The other end of the pulse transformer T is grounded, and the secondary coil T of the pulse transformer T 2 The end a of the jet cavity (10) is connected with a needle electrode (9); the discharging loop (2) is formed by an energy storage capacitor C 1 Thyristor SCR 1 Discharge resistor R 1 Composition, storage capacitor C 1 One end of (a) is connected with a thyristor SCR 1 Is the anode of the energy storage capacitor C 1 Is grounded at the other end of the thyristor SCR 1 The cathode of the (C) is respectively connected with the intermediate electrode (6) of the shock wave jet cavity (10) and the discharge resistor R 1 One end of (1) is connected with a discharge resistor R 1 The other end of the jet cavity (10) is connected with a ground electrode (4) of the shock wave jet cavity; the thyristor SCR 1 、SCR 2 Receiving trigger signal, thyristor SCR 2 After receiving the trigger signal, the pulse capacitor C is controlled 2 Discharging, namely generating high-voltage pulse through a pulse transformer T, applying the high-voltage pulse to a needle electrode (9) of a shock wave jet cavity (10), and discharging into a primary cavity (7) of the shock wave jet cavity (10) to form a pre-ionization channel; thyristor SCR 1 After receiving the trigger signal, the energy storage capacitor C is controlled 1 Discharge, rapid ablation of gas generating material generationAnd the plasmas are sprayed out at high pressure and high speed at the spray hole after accumulating in a large amount in the spray cavity.
4. The fan blade nondestructive rapid deicing simulation apparatus as set forth in claim 1, wherein: the device is characterized in that the height of the surface of a primary cavity (7) between the needle electrode (9) and the middle electrode (6) is 3mm, the inner diameter of the primary cavity is 2mm, the height of the surface of a secondary cavity (5) between the middle electrode (6) and the ground electrode (4) is 6mm, the inner diameter of the secondary cavity is 2mm, the device is tightly pressed in a cylindrical sleeve shape to form a shock wave jet cavity (10), the needle electrode (9), the middle electrode (6) and the ground electrode (4) are made of brass, and the center of the middle electrode (6) and the center of the ground electrode (4) is a spout (3) with the diameter of 2 mm.
5. The fan blade nondestructive rapid deicing simulation apparatus as set forth in claim 1, wherein: the self-adaptive screwing clamping device (18) is composed of a base (11), a self-adaptive screwing arm and a cavity clamp (17), the self-adaptive screwing arm is distributed and integrated on the base (11) at 120-degree intervals, the self-adaptive screwing arm comprises a first large arm (12), a first rotating shaft (13), a first rotating arm (14), a second rotating shaft (15) and a second rotating arm (16), one end of the first large arm (12) is fixedly arranged on the base (11), the other end of the first large arm (12) is hinged with one end of the first rotating arm (14) obliquely upwards through the first rotating shaft (13), the other end of the first rotating arm (14) is hinged with one end of the second rotating arm (16) upwards through the second rotating shaft (15), the other end of the second rotating arm (16) is fixedly arranged on the cavity clamp (17) for clamping a single shock wave jet flow cavity (10), and the base (11) is fixedly arranged at the bottom of the jet array integrating device (28).
6. The fan blade nondestructive rapid deicing simulation apparatus as set forth in claim 1, wherein: the anti-buckling arm device (27) is composed of four anti-buckling arms symmetrically distributed on two sides of the injection array integration device (28), the injection array integration device (28) is in a box shape, the anti-buckling arms are composed of a second big arm (19), a telescopic arm (20), a third rotating shaft (21), a third rotating arm (22), a fourth rotating shaft (23), a fourth rotating arm (24), rollers (26) and rollers (25), one end of the second big arm (19) is welded on the box of the injection array integration device (28), the telescopic arm (20) capable of stretching up and down is upwards arranged at the other end of the second big arm (19), the other end of the telescopic arm (20) is hinged with one end of the third rotating arm (22) upwards through the third rotating shaft (21), the other end of the third rotating arm (22) is hinged with one end of the fourth rotating arm (24) through the fourth rotating shaft (23), the other end of the fourth rotating arm (24) is provided with the rollers (25), and two ends of the rollers (25) are provided with the rollers (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310430907.0A CN116398384A (en) | 2023-04-21 | 2023-04-21 | Simulation device for nondestructive rapid deicing of fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310430907.0A CN116398384A (en) | 2023-04-21 | 2023-04-21 | Simulation device for nondestructive rapid deicing of fan blade |
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| CN116398384A true CN116398384A (en) | 2023-07-07 |
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| CN202310430907.0A Pending CN116398384A (en) | 2023-04-21 | 2023-04-21 | Simulation device for nondestructive rapid deicing of fan blade |
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| Country | Link |
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| CN (1) | CN116398384A (en) |
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- 2023-04-21 CN CN202310430907.0A patent/CN116398384A/en active Pending
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