CN114322387B - Snowfall control system and control method for airplane test - Google Patents
Snowfall control system and control method for airplane test Download PDFInfo
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- CN114322387B CN114322387B CN202210034288.9A CN202210034288A CN114322387B CN 114322387 B CN114322387 B CN 114322387B CN 202210034288 A CN202210034288 A CN 202210034288A CN 114322387 B CN114322387 B CN 114322387B
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
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Abstract
The invention discloses a snowfall control system and a control method for aircraft testing, which comprises a snow making machine, a filter, a control box and a water supply pipeline, wherein a wind barrel of the snow making machine is internally provided with a first snow making ring, a second snow making ring, a third snow making ring, a fourth snow making ring and a fifth snow making ring in sequence, the first snow making ring is connected with an air compressor through a one-way valve and a pipeline, the first snow making ring is connected with the filter through a pressure reducing valve and the water supply pipeline, and the second snow making ring, the third snow making ring, the fourth snow making ring and the fifth snow making ring are sequentially and correspondingly connected with the filter through a first electric valve, a second electric valve, a third electric valve, a fourth electric valve, a ball valve and the water supply pipeline respectively; and the programmable PLC in the control box is used for controlling the first, second, third and fourth electric valves to realize the regulation of the water supply flow. According to the invention, the first, second, third and fourth electric valves are controlled by the programmable PLC controller so as to control the snow making amount, so that the convenience of controlling the snow making amount is improved.
Description
Technical Field
The invention relates to the technical field of airplane testing, in particular to a snowfall control system and a snowfall control method for airplane testing.
Background
The climate environment laboratory is used for carrying out environment simulation tests on various climate conditions such as snowfall, rainfall, wind blowing snow, solar irradiation and the like on the airplane, and during the airplane test process, the climate environment test is usually carried out on the airplane to determine the climate environment adaptability of the airplane.
The airplane snowfall test is one of climate environment tests, and the main indexes of a test system are as follows: ambient temperature, effective snowing area, snowing intensity, snow density, snowing duration and the like, wherein the snowing intensity, namely the snowing amount is the most important index and is generally measured in mm/h or L/h.
In order to simulate different snowfall conditions from a middle latitude area to a polar region in a climate laboratory, the set range of the snowfall amount of the climate environment laboratory is 10 mm/h-75 mm/h; in order to enable the snowfall amount to be switched between the set ranges smoothly, the outdoor snowfall state can be simulated really under the indoor condition.
Therefore, a snowfall control system and a snowfall control method for aircraft testing are needed to simulate a relatively real outdoor snowfall state so as to improve the accuracy of testing the weather environmental adaptability of the aircraft.
Disclosure of Invention
In order to solve the technical problem, the invention provides a snowfall control system and a snowfall control method for aircraft testing.
The technical scheme of the invention is as follows: a snowing control system for airplane testing comprises a control box, a snow making machine, a filter and a water supply pipeline, wherein five groups of snow making rings are arranged in an air duct of the snow making machine and respectively comprise a first snow making ring, a second snow making ring, a third snow making ring, a fourth snow making ring and a fifth snow making ring,
the first snow making ring is connected with the air compressor through a one-way valve and an air supply pipeline, and is connected with the filter through a pressure reducing valve and a water supply pipeline,
the second snow making ring, the third snow making ring, the fourth snow making ring and the fifth snow making ring are all connected with the filter through water supply pipelines, ball valves are arranged on the water supply pipelines, a first electric valve is arranged on the water supply pipeline between the second snow making ring and the filter, a second electric valve is arranged on the water supply pipeline between the third snow making ring and the filter, a third electric valve is arranged on the water supply pipeline between the fourth snow making ring and the filter, and a fourth electric valve is arranged on the water supply pipeline between the fifth snow making ring and the filter;
a water temperature sensor and a water pressure sensor are arranged in the filter, and a programmable PLC (programmable logic controller) in the control box is used for controlling the work of the first electric valve, the second electric valve, the third electric valve and the fourth electric valve so as to realize the regulation of the water supply flow of each water supply pipeline;
the snowing control system for the aircraft test converts the control of the snowmaking quantity into the control of the first to fourth electric valves by using the programmable PLC, thereby reducing the complexity of the snowmaking quantity control, having large adjustable range of the snowmaking quantity and meeting the requirement of simulating snowing in multiple areas in the aircraft test.
Furthermore, a diaphragm pump controlled by frequency conversion is arranged on the filter, and the rotating speed of the diaphragm pump is regulated in real time through a PID controller according to the water pressure detected by the water pressure sensor collected by the programmable PLC controller; the pressure feedback is utilized to control the pressure of water for making snow, so that the snow making quality is effectively ensured, and the stability and the authenticity of the airplane during the simulation of snowfall in multiple areas are met.
Furthermore, the first snow making ring, the second snow making ring, the third snow making ring, the fourth snow making ring and the fifth snow making ring are respectively and correspondingly arranged on a first ring surface, a second ring surface, a third ring surface, a fourth ring surface and a fifth ring surface at the air outlet of an air duct of the snow making machine;
the first snow making ring is formed by combining an outer circle of nucleon nozzles and an inner circle of mist outlet nozzles, the nucleon nozzles and the mist outlet nozzles are all provided with a plurality of groups and are distributed on a first annular surface in an annular manner, the second snow making ring, the third snow making ring, the fourth snow making ring and the fifth snow making ring are formed by mist outlet combined modules, each mist outlet combined module comprises a fixed arc-shaped pipe fixed on the inner side wall of the adjacent annular surface of the fixed arc-shaped pipe and a movable arc-shaped pipe arranged on the corresponding annular surface, the fixed arc-shaped pipe is positioned above the movable arc-shaped pipe, the lower bottom surface of the fixed arc-shaped pipe is provided with brush hairs used for cleaning the movable arc-shaped pipe, the movable arc-shaped pipe is provided with guide blocks on the side surface corresponding to the adjacent annular surface of the movable arc-shaped pipe, and the movable arc-shaped pipe is in sliding connection with inclined sliding chutes arranged on the adjacent annular surface of the guide blocks,
the second snow making ring, the third snow making ring, the fourth snow making ring and the fifth snow making ring are respectively provided with a first liquid guide ring and a second liquid guide ring correspondingly, and liquid guide control tubes are connected below the first liquid guide ring and the second liquid guide ring,
a plurality of groups of fog outlet nozzles are arranged on the fixed arc-shaped pipe and the movable arc-shaped pipe at equal intervals, the fog outlet nozzles of the first snow making ring and the fixed arc-shaped pipe are respectively connected with the corresponding first liquid guide rings through pipelines, the movable arc-shaped pipe is respectively connected with the branch pipe arranged on the second liquid guide ring in a sliding and sealing way through a piston pipe,
the first liquid guide ring and the second liquid guide ring which correspond to the second snow making ring, the third snow making ring, the fourth snow making ring and the fifth snow making ring are respectively connected with the two liquid outlet pipes of the liquid guide control pipe through pipelines, the first liquid guide ring and the second liquid guide ring are embedded in the air duct, and arc-shaped grooves which correspond to the branch pipes and are used for the branch pipes to move are arranged on the second ring surface, the third ring surface, the fourth ring surface and the fifth ring surface;
the snow maker and each component adopt an integrated design, the economic benefit is high, the operation is simple and convenient, the difficulty of snow making quantity control is effectively reduced, the fog outlet nozzle of the movable arc-shaped pipe is controlled to be triggered or not to be triggered by utilizing the matching arrangement of the fog outlet combined module and the liquid guide control pipe, and the liquid guide control pipe can control whether the liquid guide control pipe is communicated with the liquid outlet pipe communicated with the second liquid guide ring according to different pressures of injected water, and when the liquid guide control pipe is communicated with the liquid outlet pipe communicated with the second liquid guide ring, the liquid guide control pipe moves under the matching of the piston pipe, the guide block and the inclined sliding groove and extends out of the lower part of the fixed arc-shaped pipe, and the fog outlet nozzle of the movable arc-shaped pipe is cleaned by utilizing the bristles, so that the problem that the fog outlet nozzle of the snow maker is blocked is avoided.
As an alternative of the invention, the liquid guide control tube is controlled by adopting spring expansion, two liquid outlet tubes of the liquid guide control tube are respectively arranged in the middle of the top surface and the rear end of the top surface of the liquid guide control tube, the front end of the bottom surface of the liquid guide control tube is provided with a liquid inlet tube for connecting with a filter, a piston plate connected with the liquid guide control tube in a sliding and sealing manner is arranged in the liquid guide control tube, the piston plate is connected with an auxiliary piston plate through a spring arranged on the side surface of one side of the rear end of the liquid guide control tube, and the outer end of the auxiliary piston plate is connected with a screw knob penetrating through the rear side surface of the liquid guide control tube and connected with the liquid guide control tube in a threaded manner; the liquid guide control pipe is controlled by the spring in a telescopic way, the control on the motion resistance of the piston plate can be realized without an electric control element, the operation is simple, the use is convenient, and the failure rate is low.
As another alternative of the invention, the liquid guiding control tube adopts magnetic pole repulsion control, two liquid outlet tubes of the liquid guiding control tube are respectively arranged in the middle of the top surface and the rear end of the top surface of the liquid guiding control tube, the front end of the bottom surface of the liquid guiding control tube is provided with a liquid inlet tube for connecting with a filter, a piston plate connected with the liquid guiding control tube in a sliding and sealing manner is arranged in the liquid guiding control tube, one side of the piston plate, which faces the rear end of the liquid guiding control tube, is provided with a permanent magnet sheet, the rear end surface of the liquid guiding control tube is provided with an electromagnetic sheet, the permanent magnet sheet and the magnetic pole of the electromagnetic sheet are mutually exclusive, and the rear side surface of the liquid guiding control tube is also provided with a control receiver for controlling the magnetic size of the electromagnetic sheet; the liquid guide control pipe is controlled by magnetic poles in a repulsion mode, operation is simple, and control precision of motion resistance of the piston plate is high, so that the liquid guide control pipe can more accurately control whether the liquid inlet pipe is communicated with the liquid outlet pipe in butt joint with the second liquid guide ring.
Furthermore, a fan is arranged at an air inlet of an air duct of the snow making machine, the snow making machine is provided with a support for carrying a filter and a control box, the air duct is connected with a rotating motor arranged on the filter through a connecting piece, liquid inlet pipes of liquid guide control pipes of the second snow making ring, the third snow making ring, the fourth snow making ring and the fifth snow making ring are respectively connected with a water outlet of the filter through a corresponding first electric valve, a corresponding second electric valve, a corresponding third electric valve and a corresponding fourth electric valve, and a corresponding first liquid guide ring of a mist outlet nozzle of the first snow making ring is connected with a water outlet of the filter through a pressure reducing valve and a water supply pipeline.
The invention also provides a control method of the snowfall control system for the aircraft test, which comprises the following steps:
s101, when a small amount of snow is needed, controlling the first electric valve, the second electric valve, the third electric valve and the fourth electric valve to be closed through a programmable PLC controller;
s102, collecting water supply pressure detected by a water pressure sensor through a programmable PLC controller, and adjusting the rotating speed of a diaphragm pump in real time through a PID controller to ensure the snow making quality in the case of small snow making quantity;
s103, when a large amount of snow is needed, opening one or more of a first electric valve, a second electric valve, a third electric valve and a fourth electric valve through a programmable PLC (programmable logic controller) according to the corresponding relation between the amount of snow and the number of snow making rings needed to be opened, and adjusting the water supply flow;
s104, collecting water supply pressure detected by the water pressure sensor through the programmable PLC, and adjusting the rotating speed of the diaphragm pump in real time through the PID controller to ensure the snow making quality in the case of large snow making quantity.
The invention has the beneficial effects that:
(1) according to the snowing control system and the snowing control method for the airplane test, the first electric valve, the second electric valve, the third electric valve and the fourth electric valve are controlled through the programmable PLC controller so as to control the snowing amount, and therefore convenience in controlling the snowing amount is improved.
(2) The snowing control system and the snowing control method for the airplane test control the pressure of the water for making snow by using pressure feedback, effectively ensure the snow making quality, have large adjustable range of the snow making quantity and can meet the requirement of simulating snowing in multiple areas in the airplane test.
(3) According to the snowing control system for the airplane test, the snowmaking machine and each component are integrally designed, so that the economic benefit is high, the control is simple and convenient, and the difficulty of snow making control is effectively reduced.
(4) According to the snowfall control system for aircraft testing, the snow maker can control the fog outlet nozzles of the second liquid guide ring and the movable arc-shaped pipe to be triggered or not to be triggered according to different pressures of injected water through the matching arrangement of the fog outlet combined module and the liquid guide control pipe, and the fog outlet nozzles of the movable arc-shaped pipe can be cleaned in the mode switching process, so that the problem that the fog outlet nozzles of the snow maker are blocked is solved.
Drawings
Fig. 1 is a multi-ring connection diagram of a snow ring of the snowfall control system for aircraft testing according to the present invention.
FIG. 2 is a graph of the number of snowmaking rings and the amount of snowmaking for the snowfall control system for aircraft testing of the present invention.
Fig. 3 is a schematic view of the structure of the snow making machine of the present invention.
Fig. 4 is a schematic view of a mode-one structure of the snow making machine of the present invention.
Fig. 5 is a partial enlarged view of I of fig. 4 according to the present invention.
Fig. 6 is a schematic view of a mode two structure of the snow making machine of the present invention.
FIG. 7 is an enlarged partial view of FIG. 6 according to the present invention at II.
Fig. 8 is a schematic structural view of an air duct of the snow making machine.
Fig. 9 is a partially enlarged view of fig. 8 III according to the present invention.
Fig. 10 is a schematic view showing the connection relationship between the fixed arc tube and the first liquid guide ring according to the present invention.
Fig. 11 is a schematic view of the connection of the sliding arced tube and the second liquid conducting ring of the present invention.
Fig. 12 is a partial cross-sectional view of the sliding arced tube of the present invention attached to a second fluid conducting ring.
Fig. 13 is a partial sectional view of a catheter in accordance with embodiment 2 of the present invention.
Fig. 14 is a partial sectional view of a catheter in accordance with example 3 of the present invention.
FIG. 15 is a flow chart of a method for controlling aircraft test snowfall intensity in accordance with the present invention.
Wherein, 1-a snow making machine, 11-an air duct, 111-a first ring surface, 112-a second ring surface, 113-a third ring surface, 114-a fourth ring surface, 115-a fifth ring surface, 116-an oblique sliding chute, 117-an arc chute, 12-a nucleon spray nozzle, 13-a fog outlet nozzle, 14-a fixed arc tube, 141-brush hair, 15-a movable arc tube, 151-a guide block, 152-a piston tube, 16-a first liquid guide ring, 17-a second liquid guide ring, 171-a branch tube, 18-a liquid guide control tube, 181-a liquid outlet tube, 182-a liquid inlet tube, 183-a piston plate, 184-a spring, 185-a piston auxiliary plate, 186-a screw knob, 187-a permanent magnet sheet, 188-an electromagnetic sheet, 189-a control receiver and 19-a bracket,
2-filter, 21-water temperature sensor, 22-water pressure sensor, 23-diaphragm pump,
3-controlling the box to be controlled,
4-water supply pipeline, 41-first electric valve, 42-second electric valve, 43-third electric valve, 44-fourth electric valve, 45-pressure reducing valve and 46-ball valve,
5-an air compressor, wherein the air compressor is connected with a water pump,
6-gas supply line.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments thereof for better understanding the advantages of the invention.
Example 1
As shown in fig. 1, a snowfall control system for aircraft testing comprises a control box 3, a snow making machine 1, a filter 2 and a water supply pipeline 4, wherein five groups of snow making rings are arranged in an air duct 11 of the snow making machine 1, namely a first snow making ring, a second snow making ring, a third snow making ring, a fourth snow making ring and a fifth snow making ring,
the first snow-making ring is connected with an air compressor 5 through a one-way valve and an air supply pipeline 6, and is connected with a filter through a pressure reducing valve 45 and a water supply pipeline 4,
the second snow making ring, the third snow making ring, the fourth snow making ring and the fifth snow making ring are all connected with the filter 2 through a water supply pipeline 4, the water supply pipeline 4 is provided with a ball valve 46, the water supply pipeline 4 between the second snow making ring and the filter 2 is provided with a first electric valve 41, the water supply pipeline 4 between the third snow making ring and the filter 2 is provided with a second electric valve 42, the water supply pipeline 4 between the fourth snow making ring and the filter 2 is provided with a third electric valve 43, and the water supply pipeline 4 between the fifth snow making ring and the filter 2 is provided with a fourth electric valve 44;
a water temperature sensor 21 and a water pressure sensor 22 are arranged in the filter 2, a programmable PLC controller in the control box 3 is used for controlling the work of a first electric valve 41, a second electric valve 42, a third electric valve 43 and a fourth electric valve 44 so as to realize the adjustment of the water supply flow of each water supply pipeline 4, and the programmable PLC controller is a loose AFPXHC60T programmable PLC controller;
a diaphragm pump 23 controlled by frequency conversion is arranged on the filter 2, and the rotating speed of the diaphragm pump 23 is adjusted in real time through a PID controller according to the water pressure detected by the water pressure sensor 22 collected by the programmable PLC controller; the pressure feedback is utilized to control the pressure of water for making snow, so that the snow making quality is effectively ensured, and the stability and the authenticity of the airplane during the simulation of snowfall in multiple areas are met;
the snowing control system for the aircraft test converts the control of the snowmaking quantity into the control of the first to fourth electric valves by using the programmable PLC, thereby reducing the complexity of the snowmaking quantity control, having large adjustable range of the snowmaking quantity and meeting the requirement of simulating snowing in multiple areas in the aircraft test.
As shown in fig. 15, the control method of the snowfall control system for aircraft testing includes the following steps:
s101, when a small amount of snow is needed, the programmable PLC controls the first electric valve 41, the second electric valve 42, the third electric valve 43 and the fourth electric valve 44 to be closed;
s102, collecting water supply pressure detected by a water pressure sensor 22 through a programmable PLC controller, and adjusting the rotating speed of a diaphragm pump 23 in real time through a PID controller to ensure the snow making quality in the case of small snow making quantity;
s103, when a large amount of snow is needed, opening one or more of the first electric valve 41, the second electric valve 42, the third electric valve 43 and the fourth electric valve 44 through a programmable PLC (programmable logic controller) according to the corresponding relation between the amount of snow and the number of snow making rings needed to be opened, and adjusting the water supply flow;
s104, collecting the water supply pressure detected by the water pressure sensor 22 through the programmable PLC controller, and adjusting the rotating speed of the diaphragm pump 23 in real time through the PID controller to ensure the snow making quality in the case of large snow making quantity.
Example 2
The present embodiment is substantially the same as embodiment 1, except that, as shown in fig. 4 to 9, the first snow making ring, the second snow making ring, the third snow making ring, the fourth snow making ring and the fifth snow making ring are respectively and correspondingly arranged on a first ring surface 111, a second ring surface 112, a third ring surface 113, a fourth ring surface 114 and a fifth ring surface 115 at an air outlet of an air duct 11 of a snow making machine;
as shown in fig. 5, 7 and 9, the first snow making ring is formed by combining a circle of outer nucleon nozzles 12 and a circle of inner mist outlet nozzles 13, the nucleon nozzles 12 and the mist outlet nozzles 13 are respectively provided with a plurality of groups and are distributed on the first ring surface 111 in an annular manner, the second snow making ring, the third snow making ring, the fourth snow making ring and the fifth snow making ring are respectively formed by mist outlet combined modules, as shown in fig. 5, 10 and 11, each mist outlet combined module comprises twelve groups of fixed arc-shaped tubes 14 fixed on the inner side wall of the ring surface adjacent to the fixed arc-shaped tube 14 and twelve groups of movable arc-shaped tubes 15 arranged on the corresponding ring surface, the fixed arc-shaped tubes 14 are positioned above the movable arc-shaped tubes 15, the lower bottom surfaces of the fixed arc-shaped tubes 14 are provided with brush hairs 141 for cleaning the movable arc-shaped tubes 15, the side surfaces of the movable arc-shaped tubes 15 corresponding to the adjacent ring surface are provided with guide blocks 151, and the movable arc-shaped pipe 15 is connected with the inclined sliding chute 116 arranged on the adjacent ring surface in a sliding way through the guide block 151,
as shown in fig. 6, 10 and 11, the second snow making ring, the third snow making ring, the fourth snow making ring and the fifth snow making ring are respectively provided with a first liquid guide ring 16 and a second liquid guide ring 17, a liquid guide control pipe 18 is connected below the first liquid guide ring 16 and the second liquid guide ring 17,
as shown in fig. 10 and 11, three sets of mist outlet nozzles 13 are arranged on the fixed arc-shaped pipe 14 at equal intervals, two sets of mist outlet nozzles 13 are arranged on the movable arc-shaped pipe 15 at equal intervals, the mist outlet nozzles 13 of the first snow making ring and the fixed arc-shaped pipe 14 are both connected with the corresponding first liquid guide ring 16 through pipelines, as shown in fig. 12, the movable arc-shaped pipe 15 is both connected with the branch pipe 171 arranged on the second liquid guide ring 17 through a piston pipe 152 in a sliding sealing manner, the piston pipe 152 is in a structure that an annular piston plate is arranged at the bottom of the pipe body,
as shown in fig. 4, 6, and 13, the first liquid guide ring 16 and the second liquid guide ring 17 corresponding to the second snow making ring, the third snow making ring, the fourth snow making ring, and the fifth snow making ring are respectively connected to the two liquid outlet pipes 181 of the liquid guide control pipe 18 through pipes, the first liquid guide ring 16 and the second liquid guide ring 17 are embedded in the wind tunnel 11, and the second annular surface 112, the third annular surface 113, the fourth annular surface 114, and the fifth annular surface 115 are provided with arc-shaped grooves 117 corresponding to the branch pipes 171 and used for movement of the branch pipes 171;
as shown in fig. 13, the liquid guiding control tube 18 is controlled by a spring, two liquid outlet tubes 181 of the liquid guiding control tube 18 are respectively arranged in the middle of the top surface and the rear end of the top surface of the liquid guiding control tube 18, a liquid inlet tube 182 for connecting with the filter 2 is arranged at the right end of the bottom surface of the liquid guiding control tube 18, a piston plate 183 connected with the liquid guiding control tube 18 in a sliding and sealing manner is arranged in the liquid guiding control tube 18, the piston plate 183 is connected with an auxiliary piston plate 185 through a spring 184 arranged on the rear end surface of the liquid guiding control tube 18, and the outer end of the auxiliary piston plate 185 is connected with a screw knob 186 which penetrates through the rear side surface of the liquid guiding control tube 18 and is in threaded connection with the liquid guiding control tube 18; the liquid guide control pipe 18 is controlled by the spring to stretch and contract, the control on the motion resistance of the piston plate 183 can be realized without an electric control element, the operation is simple, the use is convenient, and the failure rate is low;
as shown in fig. 3 and 4, a fan is arranged at an air inlet of an air duct 11 of the snow making machine 1, the snow making machine 1 is provided with a bracket 19 for carrying a filter 2 and a control box 3, the air duct 11 is connected with a rotating motor arranged on the filter 2 through a connecting piece, liquid inlet pipes 182 of liquid guide control pipes 18 of the second snow making ring, the third snow making ring, the fourth snow making ring and the fifth snow making ring are respectively connected with a water outlet of the filter 2 through corresponding first electric valves 41, second electric valves 42, third electric valves 43 and fourth electric valves 44, and a first liquid guide ring 16 corresponding to a fog outlet nozzle 13 of the first snow making ring is connected with a water outlet of the filter 2 through a pressure reducing valve 45 and a water supply pipeline 4;
the snow making machine and each component adopt an integrated design, the economic benefit is high, the operation is simple and convenient, the difficulty of snow making quantity control is effectively reduced, the fog outlet combined module and the liquid guide control tube 18 are matched, the liquid guide control tube 18 can control whether the liquid guide control tube 18 is communicated with the liquid outlet tube 181 communicated with the second liquid guide ring 17 according to different pressures of injected water, so that the fog outlet nozzle of the movable arc-shaped tube 15 is controlled to be triggered or not, and when the liquid guide control tube 18 is communicated with the liquid outlet tube 181 communicated with the second liquid guide ring 17, the liquid guide control tube moves under the matching of the piston tube 152, the guide block 151 and the inclined chute 116, extends out from the lower part of the fixed arc-shaped tube 14, and the fog outlet nozzle 13 of the movable arc-shaped tube 15 is cleaned by using the brush bristles 141, so that the problem of blockage of the fog outlet nozzle 13 of the snow making machine is avoided;
the working method of the snow making machine comprises the following steps:
the minimum pressure of triggering the liquid guide control tube 18 to be communicated with the liquid outlet tube 181 communicated with the second liquid guide ring 17 is input and recorded through the liquid guide control tube 18 controlled by the telescopic spring and the cooperation of a programmable PLC controller,
when a smaller amount of snow is needed, the liquid guide control tubes 18 of the second, third, fourth and fifth snow making rings do not connect the liquid outlet tube 181 communicated with the second liquid guide ring 17, the water supply flow is adjusted only by using the mist outlet nozzles 13 of the fixed arc-shaped tubes 14,
when a larger snow making amount is needed, the liquid guide control tubes 18 of the second, third, fourth and fifth snow making rings are communicated with the liquid outlet tube 181 communicated with the second liquid guide ring 17, so that the water enters the second liquid-guiding ring 17 under pressure, and passes through the cooperation of the respective branch pipes 171 with the movable arc-shaped pipes 15, the movable arc tube 15 is moved upward against its own weight by the annular piston plate of the piston tube 152 and the pressure of water, and at the same time, under the action of the guide block 151 and the oblique sliding chute 116, the upward movement of the movable arc-shaped pipe 15 is converted into the upward oblique movement, so that the mist outlet nozzle 13 of the movable arc tube 15 extends out from the lower part of the fixed arc tube 14, during which the branch tube 171 of the second liquid guide ring 17 rotates the second liquid guide ring 17 along with the movement of the movable arc tube 15 by the action of the arc groove 117, the mist outlet nozzle 13 of the movable arc-shaped pipe 15 can be cleaned through the brush bristles 141; when the pressure of water in the liquid guide control tube 18 is not enough to trigger the liquid guide control tube 18 to be communicated with the liquid outlet tube 181 communicated with the second liquid guide ring 17, the movable arc-shaped tube 15 falls to return to the original position under the action of the self gravity of the movable arc-shaped tube 15;
after water in the filter 2 enters the liquid guide control pipe 18, the piston plate 183 is pushed to move towards the left end of the liquid guide control pipe 18 under the action of water pressure, the spring 184 is continuously extruded, and when the water pressure meets the requirement of pushing the piston plate 183 to move towards the left end of the liquid guide control pipe 18 and pass through the second liquid guide ring 17, the liquid guide control pipe 18 is triggered to be communicated with the liquid outlet pipe 181 communicated with the second liquid guide ring 17.
Example 3
The present embodiment is substantially the same as embodiment 2, and is different from the embodiment in that, as shown in fig. 14, the liquid guiding control tube 18 adopts magnetic pole repulsion control, two liquid outlet pipes 181 of the liquid guiding control tube 18 are respectively arranged at the middle of the top surface and the rear end of the top surface of the liquid guiding control tube 18, a liquid inlet pipe 182 for connecting with the filter 2 is arranged at the right end of the bottom surface of the liquid guiding control tube 18, a piston plate 183 connected with the liquid guiding control tube 18 in a sliding and sealing manner is arranged in the liquid guiding control tube 18, a permanent magnet 187 is arranged on one side of the piston plate 183 facing the rear end of the liquid guiding control tube 18, an electromagnetic plate 188 is arranged on the rear end surface of the liquid guiding control tube 18, the permanent magnet 187 is mutually exclusive with the magnetic pole of the electromagnetic plate 188, and a control receiver 189 for controlling the magnetic size of the electromagnetic plate 188 is further arranged on the rear side surface of the liquid guiding control tube 18; the liquid guide control tube 18 is controlled by magnetic poles in a repulsion mode, the operation is simple, and the control precision of the motion resistance of the piston plate 183 is high, so that the liquid guide control tube 18 can more accurately control whether the liquid inlet tube 182 is communicated with the liquid outlet tube 181 butted with the second liquid guide ring 17;
the working method of the liquid guide control tube 18 comprises the following steps: after water in the filter 2 enters the liquid guiding control tube 18, under the action of water pressure, the piston plate 183 is pushed to move towards the left end of the liquid guiding control tube 18 to overcome the magnetic repulsion force generated by the electromagnetic sheet 188 and the permanent magnetic sheet 187, and when the water pressure meets the requirement of pushing the piston plate 183 to move towards the left end of the liquid guiding control tube 18 and pass through the second liquid guiding ring 17, the liquid guiding control tube 18 is triggered to be communicated with the liquid outlet tube 181 communicated with the second liquid guiding ring 17.
Application example
The airplane test is simulated to fall snow in the embodiment 1, the water temperature sensor 21 is a commercially available water temperature sensor of-30 ℃ to-50 ℃, the water pressure sensor 22 is a commercially available water pressure sensor of 0KG to 45KG, the air compressor 5 is a commercially available air compressor of 4KW and 380W, the diaphragm pump 23 is a commercially available diaphragm pump of 11KW, and the fan is a commercially available fan of 18.5KW and 380V;
the relation between the number of open rings of the snow making machine and the snow making amount is shown in figure 2, when a smaller snow making amount is needed, the programmable PLC controller controls the first, second, third and fourth electric valves to be closed, the programmable PLC controller controls the ball valve 46 to cut off water supply, only the first snow making ring is in a working state, the water supply amount is smaller, the rotating speed of the diaphragm pump 23 is adjusted in real time through the PID controller corresponding to the smaller snow making amount, so that the water pressure is maintained to be stable, and the snow making quality of the snow making machine is ensured;
when the demand of the snowmaking quantity is increased, according to the corresponding relation between the snowmaking quantity and the quantity of the snowmaking rings required to be opened, as shown in figure 2, one or more of the first, second, third and fourth electric valves are opened to adjust the water supply quantity, meanwhile, the programmable PLC controller utilizes the water pressure feedback value acquired by the water pressure sensor 22 to adjust the rotating speed of the diaphragm pump 23 in real time by utilizing the PID controller, so that the water pressure is maintained to be stable, the snowmaking quality in the case of large water supply quantity is ensured, the control of 10 mm/h-75 mm/h snowfall in the climate laboratory is realized, and the simulation demand of the climate laboratory on airplane test snowfall is met.
Claims (6)
1. A snowing control system for aircraft testing is characterized by comprising a control box (3), a snow making machine (1), a filter (2) and a water supply pipeline (4), wherein five groups of snow making rings are arranged in an air duct (11) of the snow making machine (1), and are respectively a first snow making ring, a second snow making ring, a third snow making ring, a fourth snow making ring and a fifth snow making ring,
the first snow making ring is connected with an air compressor (5) through a one-way valve and an air supply pipeline (6), and is connected with a filter through a pressure reducing valve (45) and a water supply pipeline (4),
the second snow making ring, the third snow making ring, the fourth snow making ring and the fifth snow making ring are connected with the filter (2) through water supply pipelines (4), the water supply pipelines (4) are respectively provided with a ball valve (46), the water supply pipelines (4) between the second snow making ring and the filter (2) are respectively provided with a first electric valve (41), the water supply pipelines (4) between the third snow making ring and the filter (2) are respectively provided with a second electric valve (42), the water supply pipelines (4) between the fourth snow making ring and the filter (2) are respectively provided with a third electric valve (43), and the water supply pipelines (4) between the fifth snow making ring and the filter (2) are respectively provided with a fourth electric valve (44);
a water temperature sensor (21) and a water pressure sensor (22) are arranged in the filter (2), and a programmable PLC (programmable logic controller) in the control box (3) is used for controlling the work of a first electric valve (41), a second electric valve (42), a third electric valve (43) and a fourth electric valve (44) so as to realize the regulation of the water supply flow of each water supply pipeline (4);
the first snow making ring, the second snow making ring, the third snow making ring, the fourth snow making ring and the fifth snow making ring are respectively and correspondingly arranged on a first ring surface (111), a second ring surface (112), a third ring surface (113), a fourth ring surface (114) and a fifth ring surface (115) at the air outlet of an air duct (11) of the snow making machine;
the first snow-making ring is formed by combining an outer circle of nucleus device nozzles (12) and an inner circle of mist outlet nozzles (13), the nucleus device nozzles (12) and the mist outlet nozzles (13) are all provided with a plurality of groups and are distributed on a first ring surface (111) in an annular mode, the second snow-making ring, the third snow-making ring, the fourth snow-making ring and the fifth snow-making ring are all formed by mist outlet combined modules, each mist outlet combined module comprises a fixed arc-shaped pipe (14) fixed on the inner side wall of an adjacent ring surface of the fixed arc-shaped pipe and a movable arc-shaped pipe (15) arranged on the corresponding ring surface, the fixed arc-shaped pipe (14) is positioned above the movable arc-shaped pipe (15), brush hairs (141) used for cleaning the movable arc-shaped pipe (15) are arranged on the lower bottom surface of the fixed arc-shaped pipe (14), and guide blocks (151) are arranged on the side surface of the movable arc-shaped pipe (15) corresponding to the adjacent ring surface of the movable arc-shaped pipe, and the movable arc-shaped pipe (15) is connected with an inclined sliding chute (116) arranged on the adjacent ring surface in a sliding way through a guide block (151),
the second snow making ring, the third snow making ring, the fourth snow making ring and the fifth snow making ring are respectively provided with a first liquid guide ring (16) and a second liquid guide ring (17) correspondingly, a liquid guide control pipe (18) is connected below the first liquid guide ring (16) and the second liquid guide ring (17),
a plurality of groups of fog outlet nozzles (13) are arranged on the fixed arc-shaped pipe (14) and the movable arc-shaped pipe (15) at equal intervals, the fog outlet nozzles (13) and the fixed arc-shaped pipes (14) of the first snow making ring are respectively connected with the corresponding first liquid guide rings (16) through pipelines, the movable arc-shaped pipe (15) is respectively connected with the branch pipe (171) arranged on the second liquid guide ring (17) in a sliding and sealing way through a piston pipe (152),
the first liquid guide ring (16) and the second liquid guide ring (17) which correspond to the second snow making ring, the third snow making ring, the fourth snow making ring and the fifth snow making ring respectively are connected with two liquid outlet pipes (181) of the liquid guide control pipe (18) through pipelines, the first liquid guide ring (16) and the second liquid guide ring (17) are embedded in the air duct (11), and arc-shaped grooves (117) which correspond to the branch pipes (171) and are used for moving the branch pipes (171) are arranged on the second annular surface (112), the third annular surface (113), the fourth annular surface (114) and the fifth annular surface (115).
2. The snowfall control system for aircraft testing according to claim 1, wherein the filter (2) is provided with a diaphragm pump (23) adopting frequency conversion control, and the rotating speed of the diaphragm pump (23) is adjusted in real time through a PID controller according to the water pressure detected by the water pressure sensor (22) collected by the programmable PLC controller.
3. A snowfall control system for aircraft testing according to claim 1, the liquid guide control tube (18) is controlled by adopting the spring to stretch, two liquid outlet tubes (181) of the liquid guide control tube (18) are respectively arranged in the middle of the top surface and the rear end of the top surface of the liquid guide control tube (18), the front end of the bottom surface of the liquid guide control tube (18) is provided with a liquid inlet tube (182) used for being connected with the filter (2), a piston plate (183) which is connected with the liquid guide control tube (18) in a sliding and sealing way is arranged in the liquid guide control tube (18), the piston plate (183) is connected with a piston auxiliary plate (185) through a spring (184) arranged on the rear end surface of the liquid guide control tube (18), the outer end of the auxiliary piston plate (185) is connected with a screw knob (186) which penetrates through the rear side surface of the liquid guide control tube (18) and is in threaded connection with the liquid guide control tube (18).
4. A snowfall control system for aircraft testing according to claim 1, the liquid guide control tube (18) adopts magnetic pole repulsion control, two liquid outlet tubes (181) of the liquid guide control tube (18) are respectively arranged in the middle of the top surface and the rear end of the top surface of the liquid guide control tube (18), the front end of the bottom surface of the liquid guide control tube (18) is provided with a liquid inlet tube (182) used for being connected with the filter (2), a piston plate (183) connected with the liquid guide control tube (18) in a sliding and sealing way is arranged in the liquid guide control tube (18), a permanent magnet sheet (187) is arranged on one side of the piston plate (183) facing the rear end of the liquid guide control tube (18), and the back end face of the liquid guide control tube (18) is provided with an electromagnetic sheet (188), the permanent magnetic sheet (187) and the magnetic pole of the electromagnetic sheet (188) are mutually exclusive, and the back side face of the liquid guide control tube (18) is also provided with a control receiver (189) for controlling the magnetic size of the electromagnetic sheet (188).
5. A snowfall control system for aircraft testing according to claim 3 or 4, characterized in that a fan is arranged at the air inlet of the air duct (11) of the snowmaking machine (1), the snowmaking machine (1) is provided with a bracket (19) used for carrying the filter (2) and the control box (3), the air duct (11) is connected with a rotating motor arranged on the filter (2) through a connecting piece, and the liquid inlet pipe (182) of the liquid guide control pipe (18) of the second snow making ring, the third snow making ring, the fourth snow making ring and the fifth snow making ring is respectively connected with the water outlet of the filter (2) through the corresponding first electric valve (41), the second electric valve (42), the third electric valve (43) and the fourth electric valve (44), and the first liquid guide ring (16) corresponding to the fog outlet nozzle (13) of the first snow making ring is connected with the water outlet of the filter (2) through the pressure reducing valve (45) and the water supply pipeline (4).
6. A control method for a snowfall control system for aircraft testing according to claim 5, comprising the steps of:
s101, when a small amount of snow is needed, the programmable PLC controller controls the first electric valve (41), the second electric valve (42), the third electric valve (43) and the fourth electric valve (44) to be closed;
s102, collecting water supply pressure detected by a water pressure sensor (22) through a programmable PLC controller, and adjusting the rotating speed of a diaphragm pump (23) in real time through a PID controller to ensure snow making quality in a small snow making amount;
s103, when a large amount of snow is needed, opening one or more of a first electric valve (41), a second electric valve (42), a third electric valve (43) and a fourth electric valve (44) through a programmable PLC according to the corresponding relation between the amount of snow and the number of snow making rings needed to be opened, and adjusting the water supply flow rate;
s104, collecting water supply pressure detected by the water pressure sensor (22) through the programmable PLC, and adjusting the rotating speed of the diaphragm pump (23) in real time through the PID controller to ensure the snow making quality in the case of large snow making quantity.
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| CN102853605B (en) * | 2012-10-18 | 2014-09-10 | 牡丹江雪城机械制造有限责任公司 | Snow making machine with adjustable quantity of nozzles of nucleon device |
| CN107543347A (en) * | 2017-10-24 | 2018-01-05 | 北京宾度明德滑雪设备有限公司 | Snowmaker |
| CN208817782U (en) * | 2018-09-19 | 2019-05-03 | 河南智辰智能科技有限公司 | The snow making apparatus of snowmaker |
| CN113028695B (en) * | 2020-12-16 | 2022-11-22 | 长沙中联重科环境产业有限公司 | Water supply and air supply control system of vehicle-mounted snow making machine and vehicle-mounted snow making machine adopting same |
| CN112781292B (en) * | 2021-02-01 | 2021-11-09 | 西安交通大学 | Snow making machine and control method thereof |
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