CN115156153B - Wind-electric field cooperative regulation and control spray cleaning device for aero-engine blades and working method thereof - Google Patents
Wind-electric field cooperative regulation and control spray cleaning device for aero-engine blades and working method thereof Download PDFInfo
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- CN115156153B CN115156153B CN202210824905.5A CN202210824905A CN115156153B CN 115156153 B CN115156153 B CN 115156153B CN 202210824905 A CN202210824905 A CN 202210824905A CN 115156153 B CN115156153 B CN 115156153B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
- B08B3/022—Cleaning travelling work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/14—Removing waste, e.g. labels, from cleaning liquid; Regenerating cleaning liquids
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Electrostatic Spraying Apparatus (AREA)
Abstract
The invention belongs to the technical field of aircraft engine blade cleaning, and particularly relates to a wind-electric field cooperative regulation and control spray cleaning device for an aircraft engine blade and a working method thereof; the device mainly comprises a wind-electric field coupled annular spraying electrostatic device, an annular electrode, a hydrophobic flow passage and a cleaning liquid recovery and circulation system; the device firstly attaches a part of cleaning liquid drops which are crushed by static electricity on the front surface of the blade through a wind field to clean the blade; then, the other part of charged cleaning liquid droplets are sent into the aeroengine by adjusting the spraying angle, and then the charged cleaning liquid droplets move directionally along with the electric field and are attached to the back of the fan blade of the engine, so that the effect of cleaning the back of the blade is realized. The device of the invention occupies smaller space and is convenient to operate; the cleaning agent can effectively save the consumption of the cleaning agent, and has the advantages of low cost, high cleaning efficiency and the like; and the cleaning liquid recycling system is used for recycling the cleaning waste liquid, and the waste liquid is reused by filtering.
Description
Technical Field
The invention belongs to the technical field of aircraft engine blade cleaning, and particularly relates to a wind-electric field cooperative regulation and control spray cleaning device for aircraft engine blades and a working method thereof.
The background technology is as follows:
after the aeroengine runs for a long time, residual carbon deposition, metal carbide, paint film and the like are left on the blades and the inner wall of the engine, the aeroengine is damaged due to long-term deposition, and meanwhile, potential safety hazards exist and periodic cleaning is needed. At present, a common cleaning mode is to spray and wash a fan blade disc of an aeroengine by a water gun with a certain water pressure, and to use the rotation of the engine to generate centrifugal force so as to throw out cleaning liquid and discharge the cleaning liquid from the tail of the aeroengine. Another common mode is to soak the engine in a cleaning tank, so as to achieve the purposes of descaling and removing carbon deposit under the condition of not corroding aircraft parts; however, the two methods require a large amount of cleaning liquid, the cost is high, and the cleaning efficiency of the water gun spraying method on the back of the blade is low.
Aiming at the problems, the invention discloses a wind-electric field cooperative regulation spraying technology, which enables charged liquid drops to be attached to the front surface of a blade under the coupling action of a specific electrostatic field and a wind field and simultaneously move to the back of the blade in a directional manner, thereby greatly improving the cleaning efficiency and saving the cost.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a wind-electric field cooperative regulation and control spray cleaning device for aero-engine blades, which can effectively solve the problem that a large amount of cleaning liquid is wasted in the cleaning process, and simultaneously can continuously utilize part of cleaning waste liquid through a cleaning liquid recovery and circulation system so as to meet the technical requirement of current sustainable development; the system arrangement with integration and high space utilization rate is adopted, so that the operation is more convenient.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the invention firstly provides a wind-electric field cooperative regulation spray cleaning device for aero-engine blades, which comprises a fan, a liquid storage tank, an annular electrostatic spraying device, an annular electrode, a drainage flow channel, a first fixing rod, a second fixing rod, blades, a super-drainage material coating, a cleaning liquid recovery pipeline, a cleaning liquid conveying pipeline, a main switch, a first circuit switch, a second circuit switch, a third circuit switch, a main circuit, a first circuit, a second circuit, a third circuit, a wind field, an aero-engine, a filter, a conveying pump, a filter electromagnetic valve and a conveying pump electromagnetic valve;
the fan is positioned in front of the aero-engine; the aeroengine comprises built-in blades; the annular electrostatic spraying device is positioned between the blades and the fan;
the position of the annular electrostatic spraying device is recorded as the front end of the blade; the rear end of the blade is provided with an annular electrode; the annular electrode is arranged at the periphery of the aero-engine and corresponds to the annular electrostatic spraying device;
the annular electrostatic spraying device and the annular electrode are fixed through a first fixing rod and a second fixing rod;
one end of the fan is connected with the second circuit and the first circuit through a third circuit; the second circuit is electrically connected with the annular electrostatic spraying device, and a third circuit switch is arranged on the third circuit; the second circuit is provided with a second circuit switch;
the inner wall of the aeroengine is coated with a super-hydrophobic material coating, and the width of the coating is larger than that of the blade, so that water drops centrifuged by the blade fall on the surface of the coating;
the lower part of the blade is butt-jointed with a hydrophobic flow channel so as to collect liquid sliding off from the surface of the super-hydrophobic material coating; the outlet end of the drainage flow passage is connected with the inlet end of the cleaning liquid recovery pipeline through a pipeline; the outlet end of the cleaning liquid recovery pipeline is connected with the inlet end of the filter through a pipeline, and the outlet end of the filter is connected with the inlet end of the liquid storage tank through a pipeline; a filter electromagnetic valve is arranged on the filter;
the outlet end of the liquid storage tank is connected with the inlet end of the conveying pump through a pipeline, and the outlet end of the conveying pump is connected with the inlet end of the cleaning liquid conveying pipeline through a pipeline; a delivery pump electromagnetic valve is arranged on the delivery pump;
the filter electromagnetic valve and the delivery pump electromagnetic valve are electrically connected with the first circuit, and a first circuit switch is arranged on the first circuit;
the annular electrostatic spraying device consists of a high-voltage electrostatic generator, a spray head switch, an induction electrode, a wire, a connecting pipeline built-in wire, a circular ring built-in circuit pipeline, a circular ring built-in conveying pipeline and a rotating shaft;
the cleaning liquid conveying pipeline is connected with a circular ring built-in conveying pipeline inside the circular ring, a plurality of connecting pipelines are arranged on the surface of the circular ring built-in conveying pipeline, the connecting pipelines are communicated with the spray head, and a rotating shaft is arranged at the connecting pipelines so as to enable the spray head to rotate at multiple angles;
the surface of the spray head is also provided with a spray head switch for controlling the opening and closing of the spray head; the spray head switch is electrically connected with the circular ring built-in circuit pipeline and the high-voltage electrostatic generator through the built-in lead of the connecting pipeline; the high-voltage electrostatic generator is electrically connected with the second circuit;
the front end of the spray head is also provided with an induction electrode, and the induction electrode is in a circular ring shape; the induction electrode is electrically connected with the spray head switch through a wire; one end of the lead is electrically connected with the spray head switch, and the other end of the lead is respectively electrically connected with the induction electrode and the conductive wire.
The front end of the spray head is also provided with a conductive wire, the other end of the conductive wire is communicated with the conductive wire, and the conductive wire is used for contacting and electrifying sprayed charged cleaning liquid drops to form charged liquid drops.
Preferably, the connecting pipelines are uniformly arranged at intervals on the surface of the annular built-in conveying pipeline and distributed in an array in the centripetal direction. Preferably, the fan is positioned right in front of the aero-engine, and the fan and the aero-engine are coaxially arranged; the vertical distance between the fan and the blade of the aero-engine is 50-60cm; the vertical distance between the annular electrostatic spraying device and the blade is 10-15cm; the vertical distance between the annular electrode and the blade is 20-30cm; the vertical distance between the induction electrode and the nozzle of the spray head is 3-5cm; the inner diameter of the induction electrode is consistent with the diameter of the spray head.
Preferably, the width of the super-hydrophobic material coating is 5-7cm larger than the width of the blade; the blade length is the radius length of the integral fan blade disc, namely the length of a single blade, and the blade width is the width of the single blade.
Preferably, the super-hydrophobic material coating is provided with V-shaped hydrophobic lines on the inner wall of the aeroengine, the V-shaped tips are all directed to the hydrophobic flow passage at the bottom of the inner wall of the aeroengine, and the V-shaped hydrophobic lines extend from the top of the inner wall to the bottom of the inner wall.
Preferably, the hydrophobic flow passage is positioned at the bottom of the inner wall of the aero-engine; the hydrophobic runner is designed in a 'flat-steep-flat' mode according to the appearance structure of the aeroengine, and the included angle between the 'steep' part and the horizontal plane is 10-25 degrees.
The invention also provides a working method of the wind-electric field cooperative regulation spray cleaning device for the aero-engine blade, which comprises the following specific steps:
s1, opening a main switch to enable a main circuit to be electrified; the first circuit switch and the second circuit switch are controlled to be closed;
opening a third circuit switch to control the fan to start to run so as to form a stable wind field; opening a first circuit switch, wherein the filter electromagnetic valve and the delivery pump electromagnetic valve are in an electrified state;
s2, opening a solenoid valve of the delivery pump, enabling cleaning liquid to enter the delivery pump from the liquid storage tank, enabling the cleaning liquid to enter a ring built-in delivery pipeline of the ring through the cleaning liquid delivery pipeline, storing the cleaning liquid in the ring built-in delivery pipeline of the ring, and closing the solenoid valve of the delivery pump;
s3, a second circuit switch is turned on, the high-voltage electrostatic generator is started, the spray head is controlled to be turned on through the spray head switch, cleaning liquid can be conveyed to the spray head from the annular built-in conveying pipeline through the connecting pipeline to be sprayed out, and sprayed liquid passes through the sensing electrode;
simultaneously, the sprayed liquid contacts with the conductive wire to electrify, so as to form electrified liquid drops; at the moment, the induction electrode groups distributed in the annular array can generate an electric field with the annular electrodes, so that charged liquid drops can directionally move in the electric field;
at the moment, the lead is negatively charged, the induction electrode is positively charged, the annular electrode is required to be provided with a grounding wire, and the aero-engine shell is required to be provided with the grounding wire;
s4, simultaneously, the charged cleaning liquid droplets sprayed out of the spray head are firstly adhered to the front surfaces of the blades under the action of the wind field; the angle of the spray head can be adjusted through the rotating shaft, so that the spray direction faces to the gaps among the blades, and under the action of a wind field, liquid can pass through the gaps to enter the aero-engine; the charged cleaning liquid drops entering the aeroengine can directionally move to the back of the blade under the action of the electric field; the cleaning liquid drops are attached to the front and back surfaces of the blade;
s5, after cleaning liquid is adhered to the front and the back of the blade, closing the third circuit switch and the second circuit switch, standing for a period of time, starting the aeroengine, opening a filter electromagnetic valve, starting rotation of the blade, throwing the cleaning liquid on the surface of the blade to a super-hydrophobic material coating by centrifugal force generated by rotation of the blade, enabling liquid drops to slide to a hydrophobic flow channel through V-shaped hydrophobic lines, enabling the liquid drops to flow to a cleaning liquid recovery pipeline through the hydrophobic flow channel, enabling the liquid to enter a filter, and conveying the liquid filtered by the filter to a liquid storage tank;
and S6, finally, closing the filter electromagnetic valve, closing the first circuit switch, closing the main switch, and ending the operation.
Preferably, the standing period in step S5 is 10-20min.
The invention has the beneficial effects that:
1. the device of the invention occupies smaller space, and compared with the complicated replacement of the cleaning tank for soaking, the integrated device can enable operators to operate the cleaning system more conveniently.
2. Compared with the traditional water gun cleaning mode, the device provided by the invention is more accurate, adopts a wind-electric field cooperative regulation and control spraying system, and the generated charged liquid drops have stronger adhesiveness to the blades, and can be attached to the blades for a long time to chemically dissolve carbon deposits, metal carbides and the like; secondly, the charged liquid drops can move directionally in the electric field generated by the induction electrode and the annular electrode, so that the effect that the blades can be attached by the charged liquid drops on the front and back surfaces is achieved.
3. The device has the characteristic of high utilization rate, firstly, the cleaning liquid is sprayed out in a spray mode, so that the consumption of the cleaning liquid needed by the device is greatly reduced, and the economic cost is reduced; the wind-electric field coupling system is used for regulation and control, so that most charged liquid drops are accurately attached to the blades, and compared with water gun cleaning, only a few charged liquid drops can be dispersed in the atmosphere; secondly, recycling the cleaning waste liquid by using a cleaning liquid recycling system, and reutilizing part of substances which can be reused by filtering; during recovery, the super-hydrophobic material coating of the inner wall of the blade part of the aeroengine and the V-shaped hydrophobic lines enable the recovery of the cleaning waste liquid to be more efficient.
Drawings
FIG. 1 is a general schematic of a wind-farm coordinated spray cleaning device for aircraft engine blades;
FIG. 2 is a top view of a super-hydrophobic composite flow channel design;
FIG. 3 is a front view of the annular electrostatic atomizer;
FIG. 4 is an enlarged view of the annular electrostatic atomizer spray head;
reference numerals: 1-high-voltage electrostatic generator, 2-blower, 3-liquid storage tank, 4-annular electrostatic spraying device, 5-annular electrode, 6-hydrophobic runner, 7-1-fixed rod one, 7-2-fixed rod two, 8-blade, 9-super-hydrophobic material coating, 10-cleaning liquid recovery pipeline, 11-cleaning liquid conveying pipeline, 12-main switch, 13-first circuit switch, 14-second circuit switch, 15-third circuit switch, 16-main circuit, 17-first circuit, 18-second circuit, 19-third circuit, 20-connecting pipeline, 21-shower nozzle, 22-rotating shaft, 23-wind field, 24-aeroengine, 25-filter, 26-conveying pump, 27-sensing electrode, 28-circular ring, 29-wire, 30-filter electromagnetic valve, 31-conveying pump electromagnetic valve, 32-circular ring built-in circuit pipeline, 33-circular ring built-in conveying pipeline, 34-shower nozzle switch, 35-connecting pipeline built-in wire.
Detailed description of the preferred embodiments
The invention is further illustrated by the following description in conjunction with the specific drawings and examples:
example 1:
as shown in fig. 1 to 4, the device comprises a fan 2, a liquid storage tank 3, an annular electrostatic spraying device 4, an annular electrode 5, a drainage flow channel 6, a first fixing rod 7-1, a second fixing rod 7-2, a blade 8, a super-hydrophobic material coating 9, a cleaning liquid recovery pipeline 10, a cleaning liquid conveying pipeline 11, a main switch 12, a first circuit switch 13, a second circuit switch 14, a third circuit switch 15, a main circuit 16, a first circuit 17, a second circuit 18, a third circuit 19, a wind field 23, an aeroengine 24, a filter 25, a conveying pump 26, a filter solenoid valve 30 and a conveying pump solenoid valve 31;
the fan 2 is positioned right in front of the aero-engine 24, and the fan and the aero-engine are coaxially arranged; the aero-engine 24 comprises built-in blades 8, and the vertical distance between the fan 2 and the blades 8 of the aero-engine 24 is 50cm; the annular electrostatic spraying device 4 is positioned between the blades 8 and the fan 2, and the vertical distance between the annular electrostatic spraying device 4 and the blades 8 of the aero-engine 24 is 12cm;
the position of the annular electrostatic spraying device 4 is marked as the front end of the blade 8; the rear end of the blade 8 is provided with an annular electrode 5, and the vertical distance between the annular electrode 5 and the blade 8 is 25cm; the annular electrode 5 is arranged at the periphery of the aero-engine 24 and corresponds to the annular electrostatic spraying device 4;
the inner diameter of the ring electrode 5 needs to be 4cm larger than the outer diameter of the aero-engine 24 compressor housing.
The annular electrostatic spraying device 4 and the annular electrode 5 are fixed through the first fixing rod 7-1 and the second fixing rod 7-2, and the number of the fixing rods can be increased;
one end of the fan 2 is connected with the second circuit 18 and the first circuit 17 through the third circuit 19; the second circuit 18 is electrically connected with the annular electrostatic spraying device 4, and the third circuit 19 is provided with a third circuit switch 15; the second circuit 18 is provided with a second circuit switch 14;
the inner wall of the aero-engine 24 is coated with a super-hydrophobic material coating 9, and the width of the coating is larger than that of the blades 8, so that water drops centrifuged out by the blades 8 fall on the surface of the coating; the width of the super-hydrophobic material coating 9 is 5cm larger than the width of the blade 8; wherein the blade 8 length is the radius length of the unitary fan blade disc, i.e., the length of a single blade 8, and the blade 8 width is the width of a single blade 8.
The lower part of the blade 8 is butt-jointed with a hydrophobic flow channel 6 so as to collect liquid sliding off from the surface of the super-hydrophobic material coating 9; wherein the hydrophobic flow passage 6 is positioned at the bottom of the inner wall of the aero-engine 24; the hydrophobic runner 6 is designed in a 'flat-steep-flat' mode according to the appearance structure of the aero-engine 24, the included angle between the 'steep' part and the horizontal plane is 15 degrees, and the included angle between the 'steep' part and the horizontal plane is different due to the different structures of different aero-engines; the outlet end of the drainage flow passage 6 is connected with the inlet end of the cleaning liquid recovery pipeline 10 in a pipeline manner; the outlet end of the cleaning liquid recovery pipeline 10 is connected with the pipeline at the inlet end of the filter 25, and the outlet end of the filter 25 is connected with the pipeline at the inlet end of the liquid storage tank 3; a filter electromagnetic valve 30 is arranged on the filter 25;
the super-hydrophobic material coating 9 is provided with V-shaped hydrophobic lines on the inner wall of the aeroengine 24, and extends from the top of the inner wall to the bottom hydrophobic flow passage 6, and the tips of the V-shaped are pointed at the bottom hydrophobic flow passage 6 of the inner wall of the aeroengine 24; the V-shaped hydrophobic lines can better enrich liquid and enable the liquid to accurately flow into the hydrophobic flow channel 6;
the outlet end of the liquid storage tank 3 is connected with the inlet end of the delivery pump 26 through a pipeline, and the outlet end of the delivery pump 26 is connected with the inlet end of the cleaning liquid delivery pipeline 11 through a pipeline; a delivery pump electromagnetic valve 31 is arranged on the delivery pump 26;
the filter solenoid valve 30 and the delivery pump solenoid valve 31 are electrically connected with a first circuit 17, a first circuit switch 13 is arranged on the first circuit 17,
the outlet end of the cleaning liquid conveying pipeline 11 is connected with the annular electrostatic spraying device 4 in a pipeline manner;
the annular electrostatic spraying device 4 consists of a high-voltage electrostatic generator 1, a spray head 21, a spray head switch 34, an induction electrode 27, a wire 29, a connecting pipeline 20, a connecting pipeline built-in wire 35, a circular ring 28, a circular ring built-in circuit pipeline 32, a circular ring built-in conveying pipeline 33 and a rotating shaft 22;
the cleaning liquid conveying pipeline 11 is connected with a circular ring built-in conveying pipeline 33 in the circular ring 28 in a pipeline manner, 8 uniformly distributed connecting pipelines 20 are arranged on the surface of the circular ring built-in conveying pipeline 33, and the connecting pipelines 20 are distributed in an array manner in a centripetal direction. 8 are just examples, and normally more than 16 are required; the connection pipe 20 communicates with the spray head 21, and a rotation shaft 22 is provided at the connection pipe 20 so as to allow the spray head 21 to rotate at multiple angles;
the surface of the spray head 21 is also provided with a spray head switch 34 for controlling the opening and closing of the spray head 21; the spray head switch 34 is electrically connected with the circular ring built-in circuit pipeline 32 and the high-voltage electrostatic generator 1 through a connecting pipeline built-in lead 35; the high-voltage electrostatic generator 1 is electrically connected with the second circuit 18;
the front end of the spray head 21 is also provided with an induction electrode 27, the vertical distance between the induction electrode 27 and the spray nozzle 21 is 3cm, the induction electrode 27 is in a ring shape, and the inner diameter of the induction electrode is consistent with the diameter of the spray head 21; the induction electrode 27 is electrically connected with the nozzle switch 34 through a lead 29; that is, one end of the wire 29 is electrically connected to the shower switch 34, and the other end is electrically connected to the sensing electrode 27 and the conductive wire, respectively.
Because the spray heads 21 are connected with the connecting pipeline 20, the spray heads 21 are also uniformly distributed in an annular array; wherein, the nozzle adopts a capillary nozzle, the inner diameter of the capillary is 0.3mm, the outer diameter of the capillary is 0.5mm, and the diameter of the nozzle is 10.0mm;
the length distance of the sprayed liquid of the spray head 21 is required to be larger than or equal to the length of the blades 8, and the maximum sprayed width is required to be larger than the sum of the maximum widths of each blade 8 and gaps among the blades, namely the effect of covering, spraying and cleaning the whole fan She Panquan by the cleaning liquid sprayed by the spray head 21 is ensured;
because the specifications of the aero-engine 24 blades 8 are different, the length of the aero-engine 24 blades is between 20mm and 800mm, and specific regulation and control are well known by professionals and are not repeated here;
the front end of the spray head 21 is also provided with a conductive wire, the other end of the conductive wire is communicated with a conducting wire 29, and the conductive wire is used for contacting and electrifying sprayed charged cleaning liquid drops.
A working method of a wind-electric field cooperative regulation spray cleaning device comprises the following specific steps:
s1, opening a main switch 12 to electrify a main circuit 16; the first circuit switch 13 and the second circuit switch 14 at this time; the third circuit switch 15 is turned on to control the fan 2 to start to operate, so that a stable wind field 23 is formed; the first circuit switch 13 is turned on, and the filter solenoid valve 30 and the transfer pump solenoid valve 31 are in an energized state;
the fan 2 can be of a conventional common model, and the power of the fan can be changed according to the change of different environments during off-site operation so as to ensure that sprayed charged cleaning liquid drops cannot be greatly dissipated into the atmosphere through the wind field 23;
s2, opening a conveying pump electromagnetic valve 31, enabling cleaning liquid to enter the conveying pump 26 from the liquid storage tank 3, enabling the cleaning liquid to enter a ring built-in conveying pipeline 33 of the ring 28 through the cleaning liquid conveying pipeline 11, storing the cleaning liquid in the ring built-in conveying pipeline 33 of the ring 28, and closing the conveying pump electromagnetic valve 31;
s3, the second circuit switch 14 is turned on, the high-voltage electrostatic generator 1 is started, the spray head 21 is controlled to be turned on through the spray head switch 34, cleaning liquid can be conveyed to the spray head 21 from the annular built-in conveying pipeline 33 through the connecting pipeline 20 to be sprayed, and sprayed liquid passes through the sensing electrode 27; meanwhile, the sprayed liquid is electrified by contacting with the conductive wire, so that the liquid is electrified, an electric field can be generated between the sensing electrode 27 groups distributed in an annular array and the annular electrode 5, and electrified liquid drops can directionally move in the electric field;
the high voltage electrostatic generator 1 may generate a voltage of 0-20kV, where the high voltage electrostatic generator 1 generates a voltage of 15kV to the sensing electrode 27 and the wire 29.
At this time, the lead 29 is negatively charged, the induction electrode 27 is positively charged, the annular electrode 5 needs to be provided with a grounding wire, and the housing of the aero-engine 24 needs to be provided with the grounding wire;
because the induction electrode 21 and the lead 29 are electrically connected with the high-voltage electrostatic generator 1, high voltage is generated in the working state, the spray head 21 needs to be sleeved with an insulating shell so as to avoid damage of the high voltage to the spray head 21 and other elements;
the insulating shell used for the spray head 21 can be made of Teflon, and can be a ceramic shell, and the annular electrode 5 can be a copper electrode;
s4, under the action of the wind field 23, the sprayed charged cleaning liquid drops are firstly attached to the front surfaces of the blades 8; the angle of the spray head 21 can be adjusted through the rotating shaft 22, so that the spray direction faces to the gaps among the blades 8, and liquid can pass through the gaps to enter the aero-engine 24 under the action of the wind field 23; due to the action of the electric field, charged cleaning liquid drops entering the aero-engine 24 can directionally move to the back of the blade 8, and after 15min, the cleaning liquid drops can be attached to the front and back of the blade 8;
s5, after cleaning liquid is adhered to the front and back surfaces of the blades 8, the third circuit switch 15 and the second circuit switch 14 are closed, and after the blades are stood for 20 minutes, the cleaning liquid is adhered to the back of the blisk of the fan to chemically dissolve substances such as carbon deposition, metal carbide and the like; starting the aeroengine 24, opening the filter electromagnetic valve 30, starting to rotate by the blades 8, throwing the cleaning waste liquid on the surface of the blade to the super-hydrophobic material coating 9 by the centrifugal force generated by rotation of the blade, enabling the liquid drops to slide to the hydrophobic flow channel 6 through the V-shaped hydrophobic lines, enabling the liquid drops to flow to the cleaning liquid recovery pipeline 10 through the hydrophobic flow channel 6, enabling the liquid drops to enter the filter 25, and conveying the liquid filtered by the filter 25 to the liquid storage tank 3;
such as 15min, 20min, this time length may vary depending on the situation at the site, an example time length is given here, the time required for the charged cleaning liquid droplets to move directionally to the back of the blade 8 is also different, because of the different environment at the site and the specifications of the aeroengine 24;
when the droplets of the cleaning liquid adhere, since the cleaning liquid which does not react with the stains is small, the mixed liquid state of the cleaning liquid and the cleaning waste liquid is hereinafter collectively referred to as the cleaning waste liquid;
after the cleaning waste liquid enters the filter 25 from the hydrophobic flow channel 6, the filter 25 filters and recovers the cleaning waste liquid, filters the cleaning waste liquid substances which cannot be reused, and conveys the reusable cleaning liquid substances into the liquid storage tank 3;
the cleaning liquid in the liquid storage tank 3 can flow into the delivery pump 26, and the delivery pump 26 delivers the cleaning liquid to the annular built-in delivery pipeline 33 of the annular electrostatic spraying device 4 again;
wherein, the filter element in the filter 25 contains a filter screen capable of filtering insoluble sediment generated after chemical reaction and metal carbide, sediment and paint film, and contains a filtering material capable of filtering oily substances, toxic soluble chemical substances and the like, which is an existing material, and is a cleaning filter element purchased from the market, and specific components are well known by professionals and are not repeated herein (of course, the cleaning material can be independently developed and replaced);
wherein the non-recyclable cleaning solution components include, but are not limited to: can react with the cleaning waste liquid to generate sediment, or generate undegraded and toxic substances, etc.;
the filtered waste liquid substance needs to be removed from the filter element of the filter 25 for treatment or is led out by using a conduit with negative pressure;
and S6, finally, closing the filter electromagnetic valve 30, closing the first circuit switch 13, closing the main switch 12, and ending the operation.
Description: the above embodiments are only for illustrating the present invention and not for limiting the technical solution described in the present invention; thus, while the invention has been described in detail with reference to the various embodiments described above, it will be understood by those skilled in the art that the invention may be modified or equivalents; all technical solutions and modifications thereof that do not depart from the spirit and scope of the present invention are intended to be included in the scope of the appended claims.
Claims (10)
1. The wind-electric field cooperative regulation and control spray cleaning device for the aero-engine blades is characterized by comprising a fan (2), a liquid storage tank (3), an annular electrostatic spraying device (4), an annular electrode (5), a drainage flow channel (6), a first fixing rod (7-1), a second fixing rod (7-2), a blade (8), a super-hydrophobic material coating (9), a cleaning liquid recovery pipeline (10), a cleaning liquid conveying pipeline (11), a main switch (12), a first circuit switch (13), a second circuit switch (14), a third circuit switch (15), a main circuit (16), a first circuit (17), a second circuit (18), a third circuit (19), a wind field (23), an aero-engine (24), a filter (25), a conveying pump (26), a filter electromagnetic valve (30) and a conveying pump electromagnetic valve (31);
the fan (2) is positioned in front of the aero-engine (24); the aeroengine (24) comprises built-in blades (8); the annular electrostatic spraying device (4) is positioned between the blades (8) and the fan (2);
the position of the annular electrostatic spraying device (4) is recorded as the front end of the blade (8); the rear end of the blade (8) is provided with an annular electrode (5); the annular electrode (5) is arranged at the periphery of the aero-engine (24) and corresponds to the annular electrostatic spraying device (4);
the annular electrostatic spraying device (4) and the annular electrode (5) are fixed through a first fixing rod (7-1) and a second fixing rod (7-2);
one end of the fan (2) is connected with the second circuit (18) and the first circuit (17) through a third circuit (19); the second circuit (18) is electrically connected with the annular electrostatic spraying device (4), and a third circuit switch (15) is arranged on the third circuit (19); a second circuit switch (14) is arranged on the second circuit (18);
the inner wall of the aero-engine (24) is coated with a super-hydrophobic material coating (9), and the width of the coating is larger than that of the blade (8), so that water drops centrifuged by the blade (8) fall on the surface of the coating;
a hydrophobic flow passage (6) is butted below the blade (8) so as to collect liquid sliding off from the surface of the super-hydrophobic material coating (9); the outlet end of the drainage flow passage (6) is connected with the inlet end of the cleaning liquid recovery pipeline (10) through a pipeline; the outlet end of the cleaning liquid recovery pipeline (10) is connected with the inlet end of the filter (25) through a pipeline, and the outlet end of the filter (25) is connected with the inlet end of the liquid storage tank (3) through a pipeline; a filter electromagnetic valve (30) is arranged on the filter (25);
the outlet end of the liquid storage tank (3) is connected with the inlet end of the delivery pump (26) through a pipeline, and the outlet end of the delivery pump (26) is connected with the inlet end of the cleaning liquid delivery pipeline (11) through a pipeline; a delivery pump electromagnetic valve (31) is arranged on the delivery pump (26);
the filter electromagnetic valve (30) and the delivery pump electromagnetic valve (31) are electrically connected with the first circuit (17), and a first circuit switch (13) is arranged on the first circuit (17);
the annular electrostatic spraying device (4) consists of a high-voltage electrostatic generator (1), a spray head (21), a spray head switch (34), an induction electrode (27), a wire (29), a connecting pipeline (20), a connecting pipeline built-in wire (35), a circular ring (28), a circular ring built-in circuit pipeline (32), a circular ring built-in conveying pipeline (33) and a rotating shaft (22);
the cleaning liquid conveying pipeline (11) is connected with a circular ring built-in conveying pipeline (33) inside the circular ring (28), a plurality of connecting pipelines (20) are arranged on the surface of the circular ring built-in conveying pipeline (33), the connecting pipelines (20) are communicated with the spray heads (21), and rotating shafts (22) are arranged at the connecting pipelines (20) so as to enable the spray heads (21) to rotate at multiple angles;
the surface of the spray head (21) is also provided with a spray head switch (34) for controlling the opening and closing of the spray head (21); the spray head switch (34) is electrically connected with the circular ring built-in circuit pipeline (32) and the high-voltage electrostatic generator (1) through a connecting pipeline built-in lead (35); the high-voltage electrostatic generator (1) is electrically connected with the second circuit (18);
the front end of the spray head (21) is also provided with an induction electrode (27), and the induction electrode (27) is in a circular ring shape; the induction electrode (27) is electrically connected with the nozzle switch (34) through a lead (29); one end of the lead (29) is electrically connected with the spray head switch (34), and the other end of the lead is respectively electrically connected with the induction electrode (27) and the conductive wire;
the front end of the spray head (21) is also provided with a conductive wire, the other end of the conductive wire is communicated with the conductive wire (29), and the conductive wire is used for contacting and electrifying sprayed charged cleaning liquid drops to form charged liquid drops.
2. The wind-electric field cooperative control spray cleaning device for the aero-engine blades according to claim 1, wherein the connecting pipelines (20) are uniformly arranged at intervals on the surface of the annular built-in conveying pipeline (33) and distributed in an array in a centripetal direction.
3. A wind-farm coordinated regulation spray cleaning device for aero-engine blades according to claim 1, wherein the fan (2) is located directly in front of the aero-engine (24), both coaxially arranged; the vertical distance between the fan (2) and the blade (8) of the aeroengine (24) is 50-60cm.
4. A wind-farm coordinated control spray cleaning device for aero-engine blades according to claim 1, wherein the vertical distance of the annular electrostatic spraying device (4) from the blades (8) is 10-15cm; the vertical distance between the annular electrode (5) and the blade (8) is 20-30cm.
5. A wind-farm coordinated control spray cleaning device for aero-engine blades according to claim 1, wherein the vertical distance between the induction electrode (27) and the nozzle of the nozzle (21) is 3-5cm; the inner diameter of the induction electrode (27) is consistent with the diameter of the spray head (21).
6. A wind-farm coordinated control spray cleaning device for aero-engine blades according to claim 1, wherein the super-hydrophobic material coating (9) has a width which is 5-7cm greater than the width of the blade (8); the length of the blade (8) is the radius length of the integral fan blade disc, namely the length of a single blade (8), and the width of the blade (8) is the width of the single blade (8).
7. The wind-electric field cooperative regulation spray cleaning device for the aero-engine blades according to claim 1, wherein the super-hydrophobic material coating (9) is formed with V-shaped hydrophobic lines on the inner wall of the aero-engine (24) and extends from the top of the inner wall to the bottom hydrophobic flow passage (6); the V-shaped tips are all directed to a hydrophobic runner (6) at the bottom of the inner wall of the aeroengine (24).
8. A wind-farm coordinated control spray cleaning device for aero-engine blades according to claim 1, wherein the hydrophobic flow channel (6) is located at the bottom of the inner wall of the aero-engine (24); the hydrophobic flow passage (6) is designed in a flat-steep-flat manner according to the outline structure of the aeroengine (24), wherein the included angle between the steep part and the horizontal plane is 10-25 degrees.
9. The working method of the wind-electric field cooperative regulation spray cleaning device for the aero-engine blades is characterized by comprising the following specific steps of:
s1, opening a main switch (12) to electrify a main circuit (16); the first circuit switch (13) and the second circuit switch (14) are controlled to be closed;
the third circuit switch (15) is turned on to control the fan (2) to start to operate, so that a stable wind field (23) is formed; opening a first circuit switch (13), wherein the filter electromagnetic valve (30) and the delivery pump electromagnetic valve (31) are in an electrified state;
s2, opening a conveying pump electromagnetic valve (31), enabling cleaning liquid to enter a conveying pump (26) from a liquid storage tank (3), enabling the cleaning liquid to enter a ring built-in conveying pipeline (33) of a ring (28) through a cleaning liquid conveying pipeline (11), storing the cleaning liquid in the ring built-in conveying pipeline (33) of the ring (28), and closing the conveying pump electromagnetic valve (31);
s3, a second circuit switch (14) is turned on, the high-voltage electrostatic generator (1) is started, the spray head (21) is controlled to be turned on through a spray head switch (34), cleaning liquid can be conveyed to the spray head (21) from a circular ring built-in conveying pipeline (33) through a connecting pipeline (20) to be sprayed, and sprayed liquid passes through the sensing electrode (27);
meanwhile, the sprayed liquid is electrified by contacting with the conductive wire, so that the liquid is electrified, and an electric field can be generated between the sensing electrode (27) groups distributed in an annular array and the annular electrode (5) at the moment, so that electrified liquid drops can directionally move in the electric field;
at the moment, the lead (29) is negatively charged, the induction electrode (27) is positively charged, the annular electrode (5) is required to be provided with a grounding wire, and the housing of the aero-engine (24) is required to be provided with the grounding wire;
s4, simultaneously, because of the action of the wind field (23), charged cleaning liquid drops sprayed out of the spray head (21) are firstly attached to the front surface of the blade (8); the angle of the spray head (21) can be adjusted through the rotating shaft (22) so that the spray direction faces to the gaps among the blades (8), and liquid can pass through the gaps to enter the aero-engine (24) under the action of the wind field (23); the charged cleaning liquid drops entering the aero-engine (24) can directionally move to the back of the blade (8) under the action of the electric field; the cleaning liquid drops are attached to the front and back surfaces of the blade (8);
s5, after cleaning liquid is attached to the front surface and the back surface of each blade (8), closing a third circuit switch (15) and a second circuit switch (14), after standing for a period of time, starting an aeroengine (24), opening a filter electromagnetic valve (30), enabling the blades (8) to start rotating, enabling the cleaning liquid on the surfaces of the blades to be thrown to a super-hydrophobic material coating (9) by centrifugal force generated by rotation of the blades, enabling liquid drops to slide down to a hydrophobic flow channel (6) through V-shaped hydrophobic lines, enabling the liquid drops to flow to a cleaning liquid recovery pipeline (10) through the hydrophobic flow channel (6), enabling the liquid to enter a filter (25), and conveying the liquid filtered by the filter (25) to a liquid storage tank (3);
s6, finally, closing the filter electromagnetic valve (30), closing the first circuit switch (13), closing the main switch (12), and ending the operation.
10. The method of claim 9, wherein the standing period in step S5 is 10-20min.
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