CN113928594A - Aircraft test full fresh air temperature control system and control method - Google Patents
Aircraft test full fresh air temperature control system and control method Download PDFInfo
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- CN113928594A CN113928594A CN202111545609.3A CN202111545609A CN113928594A CN 113928594 A CN113928594 A CN 113928594A CN 202111545609 A CN202111545609 A CN 202111545609A CN 113928594 A CN113928594 A CN 113928594A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/60—Testing or inspecting aircraft components or systems
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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Abstract
The invention discloses a full fresh air temperature control system for aircraft testing and a control method thereof, wherein the control system comprises an air supply section, a rotating wheel dehumidification section, a cold coil section and a control module, the air supply section comprises an air inlet pipe, a primary filter and an air feeder, the rotating wheel dehumidification section comprises two groups of first and second dehumidification rotating wheels which are in relative sliding connection, a rotating shaft positioned at the center of the inner parts of a first annular steel sleeve and a second annular steel sleeve, a plurality of connecting rods arranged at equal intervals between the first annular steel sleeve and the second annular steel sleeve and a plurality of dehumidification blades positioned inside the first annular steel sleeve and the second annular steel sleeve and enclosing into a circle, and the cold coil section comprises a rear surface cold coil, a deep cold coil and a middle efficiency filter. The control method can provide dry fresh air for a large-volume closed aircraft laboratory, ensures the realization of basic environments of various climatic environments, and provides large air volume.
Description
Technical Field
The invention relates to the technical field of airplane testing, in particular to a full fresh air temperature control system and a full fresh air temperature control method for airplane testing.
Background
Aircraft climate adaptability, which refers to the ability of an aircraft to perform all its intended functions, performance and not be destroyed under the effects of the various climatic conditions that the aircraft is expected to encounter during its life, is one of the important quality characteristics of an aircraft. The quality characteristics of an aircraft are a comprehensive concept, which includes safety, environmental suitability, reliability, testability, maintainability, supportability, and the like, and the climate environmental suitability of the aircraft is an important factor in the quality characteristics of the aircraft. Since climate adaptability is a quality characteristic of an aircraft, it must be incorporated into the aircraft by design and manufacture, and ensured by testing and management.
The airplane climate adaptability test is a short name of airplane climate environmental adaptability test, is one kind of airplane test, and refers to that under indoor simulation or outdoor natural climate environmental conditions (including typical climate environments such as high temperature, low temperature, damp heat, rain, fog, snow, freezing rain/ice accumulation, solar irradiation and the like), an airplane is subjected to the effect of climate environmental stress, so that the weather environment limit capacity information of the airplane and ground guarantee equipment thereof is obtained, and the weather environmental adaptability of the airplane is comprehensively evaluated according to development requirements, failure criteria and test data, so that the degree of the weather environmental adaptability meeting the requirements is determined. The airplane climate test is an important means for ensuring the adaptability of the airplane climate environment, is an evaluation method for confirming whether the adaptability of the airplane climate environment meets the requirements through tests, and is the basis of the quality acceptance of the airplane. The airplane climate test is a climate environment adaptability test without long-term effects of airplane structure corrosion, aging and the like, belongs to a non-destructive test, and can be normally used after the test is finished.
Various climatic laboratories with different sizes and different climatic types are established in various industries of China to carry out climatic tests on materials, components or equipment and the like, and the experimental facilities have small volumes and relatively single functions. China is blank in the design and construction of climate environment simulation facilities suitable for large-scale equipment such as airplanes and the like. In the climate environment test of such large-scale equipment, only the outfield natural climate test can be performed, and there are cases where it is difficult to capture the climate conditions, and there are also problems such as long test period, difficulty in organization coordination, and large resource consumption.
Climate laboratories have stringent requirements for laboratory air when used. When various experiments are carried out, strict requirements are imposed on the temperature and the humidity of air in a laboratory; the experiment can consume the laboratory air, if not in time mend new air will make the laboratory be in the negative pressure and the not up to standard condition of air quality, can have serious influence to laboratory building structure and experimental effect to, the new trend is still being undertaken for the task of circulated air system heat exchanger defrosting, and air humidity and temperature are not up to standard then can't reach the dehumidification effect of ideal, influence aircraft test effect.
Disclosure of Invention
Aiming at the problems, the invention provides a full fresh air temperature control system and a control method for airplane test.
The technical scheme of the invention is as follows:
the air supply section, the rotating wheel dehumidification section and the cold coil section are all electrically connected with the control module, a PLC (programmable logic controller) is arranged in the control module, and a PID (proportion integration differentiation) module is arranged in the PLC;
the air supply section comprises a first shell, an air inlet pipe positioned at the foremost end in the first shell, a primary filter positioned behind the air inlet pipe, and an air feeder positioned behind the primary filter;
the rotating wheel dehumidification section comprises a second shell, a dehumidification rotating wheel set positioned in the second shell and a drying fan positioned at the upper part of the outer side wall of the second shell;
the dehumidifying rotating wheel set comprises a first dehumidifying rotating wheel and a second dehumidifying rotating wheel which are arranged side by side from front to back, the first dehumidifying rotating wheel and the second dehumidifying rotating wheel are identical in structure arrangement and respectively comprise a first annular steel sleeve and a second annular steel sleeve which are arranged in parallel from front to back, a rotating shaft which is positioned in the centers of the first annular steel sleeve and the second annular steel sleeve, a plurality of connecting rods which are arranged at equal intervals between the first annular steel sleeve and the second annular steel sleeve, and a plurality of dehumidifying blades which are positioned in the first annular steel sleeve and the second annular steel sleeve and enclose into a circle;
the connecting rod is fixedly connected with the first annular steel sleeve and the second annular steel sleeve, one end of the dehumidifying blade is fixedly connected with the rotating shaft, the other end of the dehumidifying blade is fixedly connected with the inner wall of the first annular steel sleeve or the second annular steel sleeve, driving components for driving the dehumidifying blade to rotate are arranged at the tops of the first dehumidifying rotating wheel and the second dehumidifying rotating wheel, a group of supporting components are arranged on two sides of the bottom of each of the first dehumidifying rotating wheel and the second dehumidifying rotating wheel, and the rotating shafts of the first dehumidifying rotating wheel and the second dehumidifying rotating wheel are in telescopic connection through a group of electric telescopic rods;
the cold coil section includes the third casing, is located the inside back table cold coil of foremost of third casing is located the degree of depth cold coil at back table cold coil rear, and is located the well effect filter at degree of depth cold coil rear.
Furthermore, the dehumidification blade is made of paper materials, a plurality of honeycomb-shaped small holes are formed in the dehumidification blade, the thickness of the dehumidification blade is larger than that of the first annular steel sleeve and that of the second annular steel sleeve, and the dry specific gravity of the dehumidification blade is 240kg/m3The dehumidifying blade can resist high temperature, high humidity and extreme dryness and has strong adaptability.
Further, drying fan is two and is located respectively both ends around the second casing, the inside drying coil pipe that is equipped with of drying fan, one of them drying fan is located first casing top, another drying fan is located third casing top, second casing correspond two drying fan position departments and all are equipped with the opening, can provide dry air for the runner group that dehumidifies.
Further, the driving assembly comprises a driving motor, a driving rotating wheel connected with the output end of the driving motor, a first fixing rod fixedly connected with the top of the driving motor, and a second fixing rod rotatably connected with the driving rotating wheel;
the drive runner periphery is equipped with a plurality of lugs along circumference equidistant, the lug is adjacent two sets of space between the connecting rod corresponds the cooperation and is connected, driving motor is located drive runner front end center department, drive runner rear end center department through a set of dwang with second dead lever lower part rotates the connection, first dead lever and second dead lever top all with the interior top surface fixed connection of second casing can drive the dehumidification runner group through the setting of drive runner steadily and rotate and can not influence air supply and dry process again simultaneously.
Furthermore, the supporting component include with the same supplementary runner of drive runner structure, be located the base of supplementary runner below, be located the set-square of base both sides, be located the recess that is used for holding supplementary runner between two set-squares of base top, the base below of two sets of supporting components of second dehumidification runner all is equipped with a pulley, and this supporting component can make the dehumidification runner group more stable at the rotation in-process, produces the potential safety hazard when preventing that wind-force is stronger.
Preferably, a water outlet hose is arranged between the auxiliary rotating wheel and the groove, a nozzle is arranged at one end of the water outlet hose corresponding to the inner side of the dehumidifying rotating wheel set, one end of the water outlet hose corresponding to the outer side of the dehumidifying rotating wheel set is connected with a water supply pipe, two groups of water outlet hoses which are positioned at the same side of the first dehumidifying rotating wheel and the second dehumidifying rotating wheel are connected with the same water supply pipe, the auxiliary rotating wheel can also intermittently extrude the water outlet hose while providing support, the purpose of enhancing water outlet pressure is achieved, and the cleaning effect is improved.
Further, electric telescopic handle include canned paragraph, flexible section and with canned paragraph middle part fixed connection's connecting rod, the canned paragraph is connected with the pivot of first dehumidification runner, flexible section is connected with the pivot of second dehumidification runner, the connecting rod upper end with the interior top surface fixed connection of second casing, connecting rod lower part cover are equipped with the guide plate, the guide plate includes the lagging and is located the lagging inside and with lagging sliding connection's inner panel, the inner panel with the back end of flexible section is through a branch fixed connection, and the position department that the inner panel center department corresponds the connecting rod is equipped with the fluting, can shunt the humid air that dry air and forced draught blower input that dry fan blown out through the setting of guide plate, has further improved dehumidification effect and drying effect, has avoided two processes to produce the conflict.
Furthermore, the second shell is provided with a first sealing door at the joint of the first shell, the second shell is provided with a second sealing door at the joint of the third shell, a first pressure gauge is arranged in the first shell, and a second pressure gauge and a thermometer are arranged in the third shell, so that the pressure and the temperature in the system can be monitored in time, the air volume of the system can be adjusted in time, and the stability of the operation of the system is improved.
The control method of the aircraft testing full fresh air temperature control system comprises the following steps:
s1, air volume control: the blower is started through the control module, the internal pressure of the first shell and the internal pressure of the third shell are monitored, the internal pressure difference between the third shell and the first shell can be synchronously reduced or increased along with the increase/reduction of the air volume, the pressure difference feedback signal is subjected to PID (proportion integration differentiation) control through the PLC (programmable logic controller) of the control module and then outputs a control signal, and the air volume of the blower is controlled to be increased or reduced so as to change the air volume, so that the requirement of the experimental bin on the air volume change is met;
s2, dehumidification by a rotating wheel: the air blown out by the air blower is dehumidified by the two sets of first dehumidifying rotating wheels and the second dehumidifying rotating wheels which rotate reversely and synchronously, when external air passes through the dry dehumidifying rotating wheels, moisture can be left on dehumidifying blades of the dehumidifying rotating wheels, the dehumidifying rotating wheels rotate at the rotating speed of 8-12r/h to enable the wet dehumidifying blades to be rotated to an air duct of an upper drying fan from the lower part of a rotating wheel dehumidifying section, a drying coil of the drying fan reduces the dew point temperature of the air in front of the drying fan, the drying fan blows low-dew point dry air into a wet dehumidifying rotating wheel set to take away the moisture in the dehumidifying blades, the dry dehumidifying rotating wheel set continuously rotates to contact with the external air for drying, the drying purpose is achieved, and meanwhile, the air volume of the drying fan is synchronously adjusted by the control module and the air volume of the control signal control air blower in the step S1;
s3, temperature adjustment: monitoring the temperature of the supplied air through a thermometer, comparing the temperature with a set temperature value, performing PID (proportion integration differentiation) control through a PLC (programmable logic controller) of a control module, adjusting the cold water flow rate through a water valve of a surface cooling coil pipe to adjust the temperature of the supplied air, wherein the deep cooling coil pipe has dew point anti-freezing protection, and when the dew point temperature is lower than or equal to the set temperature of minus 15 ℃ to minus 10 ℃, the PLC of the control module performs PID control on the water valve of the deep cooling coil pipe to adjust the cold water flow rate to perform deep cooling;
s4, cleaning a dehumidification rotating wheel set: and (5) after the air supply in the steps S1-S3 is finished, closing the sealing doors at two sides of the second shell, installing a water outlet hose into the base, supplying water into the water supply hose through the water pump, intermittently pressurizing the water outlet hose through the auxiliary rotating wheel, and cleaning dust attached to the dehumidifying rotating wheel set through the nozzle.
The invention has the beneficial effects that:
(1) the aircraft testing full fresh air temperature control system can provide dry fresh air for a large-volume closed aircraft laboratory, ensures the realization of basic environments of various climatic environments, has a clear system design interface, is closely related among all parts of components, and has high system stability and large air volume.
(2) The aircraft testing full fresh air temperature control system can further improve the dehumidification effect through the two sets of dehumidification rotating wheels which can slide relatively, enables the dehumidification effect to be better through the two sets of dehumidification blades which are superposed in front and back, can resist high temperature, high humidity and extreme drying, has stronger adaptability, can shunt dry air blown out by a drying fan and moist air input by a blower through the arrangement of the guide plate, further improves the dehumidification effect and the drying effect, and avoids conflict between the two processes.
(3) According to the aircraft testing full fresh air temperature control system, the water outlet hose is additionally arranged in the base, so that the auxiliary rotating wheel can intermittently extrude the water outlet hose while providing support, the purpose of enhancing the water outlet pressure is achieved, and the cleaning effect is improved.
(4) According to the airplane test fresh air temperature control method, multiple control modes of a fresh air system are established, and different control modes correspond to different test environment requirements, so that the environmental laboratory environment simulation method has good expandability.
Drawings
FIG. 1 is a schematic diagram of the external structure of a fresh air temperature control system for testing an aircraft according to the present invention;
FIG. 2 is a schematic diagram of the internal structure of the aircraft test fresh air temperature control system of the present invention;
FIG. 3 is a schematic diagram of a front structure of a dehumidifying rotor of the fresh air temperature control system for aircraft testing according to the present invention;
FIG. 4 is a schematic diagram of a back structure of a dehumidifying rotor of the fresh air temperature control system for aircraft testing according to the present invention;
FIG. 5 is a front view of the aircraft test full fresh air temperature control system of the present invention;
FIG. 6 is a schematic structural view of a support assembly of the aircraft testing full fresh air temperature control system of the present invention;
FIG. 7 is a schematic view of a deflector structure of the aircraft test full fresh air temperature control system of the present invention;
FIG. 8 is a schematic structural diagram of a driving assembly of the aircraft testing full fresh air temperature control system of the present invention;
FIG. 9 is a front view of the drive assembly of the aircraft test full fresh air temperature control system of the present invention.
Wherein, 1-a blowing section, 11-a first shell, 12-an air inlet pipe, 13-a primary filter, 14-a blower, 15-a first pressure meter, 2-a rotating wheel dehumidification section, 21-a second shell, 22-a drying fan, 23-a drying coil, 24-an opening, 25-a first sealing door, 26-a second sealing door, 3-a cold coil section, 31-a third shell, 32-a rear surface cooling coil, 33-a deep cooling coil, 34-a middle filter, 35-a second pressure meter, 36-a thermometer, 4-a control module, 5-a dehumidification rotating wheel group, 51-a first dehumidification rotating wheel, 52-a second dehumidification rotating wheel, 53-a first annular steel sleeve, 54-a second annular steel sleeve, 55-a rotating shaft and 56-a connecting rod, 57-a dehumidifying blade, 58-an electric telescopic rod, 581-a fixed section, 582-a telescopic section, 583-a connecting rod, 59-a guide plate, 591-a sleeve plate, 592-an inner plate, 593-a supporting rod, 594-a slot, 6-a driving component, 61-a driving motor, 62-a driving rotating wheel, 621-a lug, 622-a rotating rod, 63-a first fixing rod, 64-a second fixing rod, 7-a supporting component, 71-an auxiliary rotating wheel, 72-a base, 73-a groove, 74-a triangular plate, 75-a pulley, 76-a water outlet hose, 77-a nozzle and 78-a water supply pipe.
Detailed Description
Example 1
As shown in fig. 1 and 2, the aircraft testing full fresh air temperature control system comprises an air supply section 1, a rotating wheel dehumidification section 2, a cold coil section 3 and a control module 4, wherein the air supply section 1, the rotating wheel dehumidification section 2 and the cold coil section 3 are arranged from front to back, the control module 4 is electrically connected with the air supply section 1, the rotating wheel dehumidification section 2 and the cold coil section 3, a PLC controller is arranged in the control module 4, and a PID module is arranged in the PLC controller;
as shown in fig. 2, the blowing section 1 includes a first casing 11, an air inlet duct 12 located at the foremost end inside the first casing 11, a primary filter 13 located behind the air inlet duct 12, and a blower 14 located behind the primary filter 13;
as shown in fig. 2-4, the rotor dehumidification section 2 includes a second housing 21, a dehumidification rotor set 5 inside the second housing 21, and two drying fans 22 which are commercially available and are respectively arranged at the front end and the rear end of the second shell 21, a drying coil 23 is arranged in the drying fans 22, one drying fan 22 is located above the first shell 11, the other drying fan 22 is located above the third shell 31, openings 24 are formed in positions, corresponding to the two drying fans 22, of the second shell 21, a first sealing door 25 is arranged at the joint of the second shell 21 and the first shell 11, a second sealing door 26 is arranged at the joint of the second shell 21 and the third shell 31, a first pressure gauge 15 is arranged inside the first shell 11, and a second pressure gauge 35 and a temperature gauge 36 are arranged inside the third shell 31;
the dehumidifying rotating wheel set 5 comprises a first dehumidifying rotating wheel 51 and a second dehumidifying rotating wheel 52 which are arranged side by side front and back, the first dehumidifying rotating wheel 51 and the second dehumidifying rotating wheel 52 are same in structure arrangement, and comprise a first annular steel sleeve 53 and a second annular steel sleeve 54 which are arranged in parallel front and back, a rotating shaft 55 which is positioned at the center of the inner parts of the first annular steel sleeve 53 and the second annular steel sleeve 54, a plurality of connecting rods 56 which are arranged at equal intervals between the first annular steel sleeve 53 and the second annular steel sleeve 54, and a first annular steel sleeve 53 and a second annular steel sleeve 54 are positioned inside to enclose into a wholeA plurality of circular dehumidifying blades 57, the dehumidifying blades 57 are made of commercially available paper materials, a plurality of honeycomb-shaped small holes are arranged on the dehumidifying blades 57, the thickness of the dehumidifying blades 57 is greater than that of the first annular steel sleeve 53 and the second annular steel sleeve 54, and the dry specific gravity of the dehumidifying blades 57 is 240kg/m3；
The connecting rod 56 is fixedly connected with the first annular steel sleeve 53 and the second annular steel sleeve 54, one end of the dehumidifying blade 57 is fixedly connected with the rotating shaft 55, the other end of the dehumidifying blade 57 is fixedly connected with the inner wall of the first annular steel sleeve 53 or the second annular steel sleeve 54, the tops of the first dehumidifying rotating wheel 51 and the second dehumidifying rotating wheel 52 are respectively provided with a driving assembly 6 for driving the dehumidifying rotating wheel to rotate, two sides of the bottoms of the first dehumidifying rotating wheel 51 and the second dehumidifying rotating wheel 52 are respectively provided with a group of supporting assemblies 7, and the rotating shafts 55 of the first dehumidifying rotating wheel 51 and the second dehumidifying rotating wheel 52 are in telescopic connection through a group of electric telescopic rods 58;
as shown in fig. 2 and 7, the electric telescopic rod 58 includes a fixed section 581, a telescopic section 582 and a connecting rod 583 fixedly connected to the middle of the fixed section 581, the electric telescopic rod 58 is a commercially available electric hydraulic push rod, the fixed section 581 is connected to a rotating shaft 55 of the first dehumidifying rotor 51, the telescopic section 582 is connected to a rotating shaft 55 of the second dehumidifying rotor 52, the upper end of the connecting rod 583 is fixedly connected to the inner top surface of the second housing 21, a flow guide plate 59 is sleeved on the lower portion of the connecting rod 583, the flow guide plate 59 includes a sleeve plate 591 and an inner plate 592 located inside the sleeve plate 591 and slidably connected to the sleeve plate 591, the inner plate 592 is fixedly connected to the rear end of the telescopic section 582 via a support bar 593, and a slot 594 is formed in the center of the inner plate 592 corresponding to the position of the connecting rod 583;
as shown in fig. 5, 8 and 9, the driving assembly 6 includes a driving motor 61, a driving wheel 62 connected to an output end of the driving motor 61, a first fixing rod 63 fixedly connected to a top of the driving motor 61, and a second fixing rod 64 rotatably connected to the driving wheel 62; the driving motor 61 is a commercially available gear reduction motor, a plurality of bumps 621 are arranged on the periphery of the driving rotating wheel 62 at equal intervals along the circumferential direction, the bumps 621 are correspondingly matched and connected with gaps between two adjacent groups of connecting rods 56, the driving motor 61 is positioned at the center of the front end of the driving rotating wheel 62, the center of the rear end of the driving rotating wheel 62 is rotatably connected with the lower part of the second fixing rod 64 through a group of rotating rods 622, and the top ends of the first fixing rod 63 and the second fixing rod 64 are fixedly connected with the inner top surface of the second shell 21;
as shown in fig. 6, the supporting assembly 7 includes an auxiliary wheel 71 having the same structure as the driving wheel 62, a base 72 located below the auxiliary wheel 71, triangular plates 74 located at both sides of the base 72, and a groove 73 located between the two triangular plates 74 above the base 72 and used for accommodating the auxiliary wheel 71, a pulley 75 is disposed below the base 72 of each of the two groups of supporting assemblies 7 of the second desiccant wheel 52, a water outlet hose 76 is disposed between the auxiliary wheel 71 and the groove 73, a nozzle 77 is disposed at one end of the water outlet hose 76 corresponding to the inner side of the desiccant wheel group 5, one end of the water outlet hose 76 corresponding to the outer side of the desiccant wheel group 5 is connected to a water supply pipe 78, and the two groups of water outlet hoses 76 located at the same side of the first desiccant wheel 51 and the second desiccant wheel 52 are connected to the same water supply pipe 78;
as shown in fig. 2, the cooling coil section 3 includes a third shell 31, a rear surface cooling coil 32 located at the foremost end inside the third shell 31, a deep cooling coil 33 located behind the rear surface cooling coil 32, and a middle-effect filter 34 located behind the deep cooling coil 33.
The control method of the aircraft testing full fresh air temperature control system comprises the following steps:
s1, air volume control: the blower 14 is started through the control module 4, the internal pressure of the first shell 11 and the third shell 31 is monitored, the internal pressure difference between the third shell 31 and the first shell 11 is synchronously reduced/increased along with the increase/reduction of the air volume, the pressure difference feedback signal is subjected to PID control through the PLC controller of the control module 4 and then outputs a control signal, and the air volume of the blower 14 is controlled to be increased or reduced so as to change the air volume, so that the requirement of the experimental bin on the air volume change is met;
s2, dehumidification by a rotating wheel: the air blown out by the blower 14 is dehumidified by two sets of first dehumidifying rotating wheels 51 and second dehumidifying rotating wheels 52 rotating synchronously in opposite directions, when the outside air passes through the dry dehumidifying rotating wheel set 5, moisture is remained on dehumidifying blades 57 of the dehumidifying rotating wheel set 5, the dehumidifying rotating wheel set 5 rotates at a rotating speed of 10r/h to rotate the wet dehumidifying blades 54 from the lower part of the rotating wheel dehumidifying section 2 to the air channel of the upper drying fan 22, the drying coil 23 of the drying fan 22 reduces the dew point temperature of the air in front of the drying fan 22, the drying fan 22 blows the low dew point dry air into the wet dehumidifying rotating wheel set 5 to take away the moisture in the dehumidifying blades 57, the dry rotating wheel set 5 continuously rotates and contacts the outside air for drying, and the purpose of drying is achieved, meanwhile, the air volume of the drying fan 22 is synchronously adjusted through the control module 4 and the control signal in the step S1;
s3, temperature adjustment: the temperature of the supplied air is monitored through the thermometer 36 and compared with a set temperature value, then PID control is carried out through a PLC (programmable logic controller) of the control module 4, the water valve of the surface cooling coil 32 adjusts the cold water flow so as to adjust the temperature of the supplied air, the deep cooling coil 33 has dew point anti-freezing protection, and when the dew point temperature is lower than or equal to the set temperature of minus 12 ℃, the PLC of the control module 4 carries out PID control on the water valve of the deep cooling coil 33 to adjust the cold water flow so as to carry out deep cooling;
s4, washing the dehumidifying wheel 5: after the air supply in steps S1-S3 is completed, the first sealing door 25 and the second sealing door 26 on both sides of the second housing 21 are closed, the water outlet hose 76 is installed in the base 72, water is supplied into the water supply pipe 78 by the water pump, the water outlet hose 76 is intermittently pressurized by the auxiliary runner 71, and the dust attached to the dehumidifying runner set 5 is cleaned by the nozzle 77.
Example 2
The present embodiment is different from embodiment 1 in that: the rotation speed of the desiccant rotor 5 in step S2 is different.
S2, dehumidification by a rotating wheel: the dehumidifying rotary wheel set 5 rotates at a rotating speed of 8r/h to transfer the wet dehumidifying blades 57 from the lower part of the rotary wheel dehumidifying section 2 to the air duct of the upper drying fan 22.
Example 3
The present embodiment is different from embodiment 1 in that: the rotation speed of the desiccant rotor 5 in step S2 is different.
S2, dehumidification by a rotating wheel: the dehumidifying rotor set 5 rotates at a rotation speed of 12r/h to rotate the wet dehumidifying blades 57 from the lower part of the rotor dehumidifying section 2 to the wind channel of the upper drying fan 22.
Example 4
The present embodiment is different from embodiment 1 in that: the dew point freeze protection temperature is different in step S3.
S3, temperature adjustment: the temperature of the supplied air is monitored through the thermometer 36 and compared with a set temperature value, then PID control is carried out through a PLC (programmable logic controller) of the control module 4, the water valve of the surface cooling coil 32 adjusts the cold water flow so as to adjust the temperature of the supplied air, the deep cooling coil 33 has dew point anti-freezing protection, and when the dew point temperature is lower than or equal to the set temperature of minus 15 ℃, the PLC of the control module 4 carries out PID control on the water valve of the deep cooling coil 33 to adjust the cold water flow so as to carry out deep cooling.
Example 5
The present embodiment is different from embodiment 1 in that: the dew point freeze protection temperature is different in step S3.
S3, temperature adjustment: the temperature of the supplied air is monitored through the thermometer 36 and compared with a set temperature value, then PID control is carried out through a PLC (programmable logic controller) of the control module 4, the water valve of the surface cooling coil 32 adjusts the cold water flow so as to adjust the supplied air temperature, the deep cooling coil 33 has dew point anti-freezing protection, and when the dew point temperature is lower than or equal to the set temperature of minus 10 ℃, the PLC of the control module controls the water valve of the deep cooling coil 33 to adjust the cold water flow through PID control so as to carry out deep cooling.
The working principle is as follows: the working principle of the dehumidifying rotor 5 will be described below with reference to the control method of the aircraft testing full fresh air temperature control system of the present invention.
When the method is used, when the step S2 is performed, the two sets of driving motors 61 are turned on to drive the two sets of driving wheels 62 to synchronously rotate in opposite directions, and the bumps 621 of the driving wheels 62 are connected with the gaps between the two adjacent sets of connecting rods 56 in a matching manner, so that the purpose of driving the dehumidifying wheel set 5 to rotate is achieved;
in the rotating process of the dehumidifying rotor set 5, the telescopic section 582 of the electric telescopic rod 58 continuously performs reciprocating motion of extending and retracting, so that the second dehumidifying rotor 52 performs reciprocating motion under the action of the pulley 75, the dehumidifying effect on air is improved by the way, meanwhile, the inner plate 592 of the guide plate 59 is driven to continuously perform reciprocating motion of extending and retracting, when the inner plate 592 slides, the connecting rod 583 completes relative sliding in the groove 594, mutual interference of two processes of dehumidifying and drying is avoided, the drying effect on the dehumidifying blades 57 is improved, in the rotating process of the dehumidifying rotor set 5, the auxiliary rotor 71 is also matched and connected with gaps between two adjacent groups of connecting rods 56, and the stability of the dehumidifying rotor set 5 is improved;
when the step S4 is reached, the electric telescopic rod 58 is closed, the maximum distance between the two sets of dehumidifying wheels 5 is kept unchanged, a water outlet hose 76 is additionally arranged in the groove 73 at the bottom of the auxiliary rotating wheel 71, water is supplied into a water supply pipe 78 through a water pump, the water is sprayed out from a nozzle 77 after passing through the water outlet hose 76, simultaneously, the two sets of driving motors 61 are turned on to make the first desiccant rotor 51 and the second desiccant rotor 52 rotate synchronously, the auxiliary rotating wheel 71 is driven to rotate in the rotating process, the water outlet hose 76 is intermittently extruded through the auxiliary rotating wheel 71, thereby realizing the purpose of enhancing the water outlet pressure, simultaneously cleaning the dehumidifying blades 57 and the guide plate 59 by the high-pressure water column sprayed by the nozzle 77 in the rotating process of the dehumidifying rotor set 5, removing the dust attached on the surfaces of the dehumidifying blades 57 and the guide plate 59, stopping supplying water to the water supply pipe 78 after the cleaning is finished, and the two sets of drying fans 22 are turned on to dry the first desiccant wheel 51 and the second desiccant wheel 52.
Claims (9)
1. The aircraft testing full fresh air temperature control system is characterized by comprising an air supply section (1), a rotating wheel dehumidification section (2), a cold coil section (3) and a control module (4), wherein the air supply section (1), the rotating wheel dehumidification section (2) and the cold coil section (3) are arranged from front to back, the control module (4) is electrically connected with the air supply section, a PLC (programmable logic controller) is arranged in the control module (4), and a PID (proportion integration differentiation) module is arranged in the PLC;
the air supply section (1) comprises a first shell (11), an air inlet pipe (12) positioned at the foremost end in the first shell (11), a primary filter (13) positioned behind the air inlet pipe (12), and an air feeder (14) positioned behind the primary filter (13);
the runner dehumidification section (2) comprises a second shell (21), a dehumidification runner set (5) positioned inside the second shell (21), and a drying fan (22) positioned on the upper part of the outer side wall of the second shell (21);
the dehumidifying rotating wheel set (5) is a first dehumidifying rotating wheel (51) and a second dehumidifying rotating wheel (52) which are arranged side by side front and back, the first dehumidifying rotating wheel (51) and the second dehumidifying rotating wheel (52) are identical in structure arrangement and respectively comprise a first annular steel sleeve (53) and a second annular steel sleeve (54) which are arranged in parallel front and back, a rotating shaft (55) which is positioned at the center of the inner parts of the first annular steel sleeve (53) and the second annular steel sleeve (54), a plurality of connecting rods (56) which are arranged at equal intervals between the first annular steel sleeve (53) and the second annular steel sleeve (54), and a plurality of dehumidifying blades (57) which are positioned inside the first annular steel sleeve (53) and the second annular steel sleeve (54) and enclose into a round shape;
the connecting rod (56) is fixedly connected with a first annular steel sleeve (53) and a second annular steel sleeve (54), one end of a dehumidifying blade (57) is fixedly connected with the rotating shaft (55), the other end of the dehumidifying blade (57) is fixedly connected with the inner wall of the first annular steel sleeve (53) or the inner wall of the second annular steel sleeve (54), the tops of a first dehumidifying rotating wheel (51) and a second dehumidifying rotating wheel (52) are respectively provided with a driving component (6) for driving the dehumidifying rotating wheel to rotate, two sides of the bottoms of the first dehumidifying rotating wheel (51) and the second dehumidifying rotating wheel (52) are respectively provided with a group of supporting components (7), and the rotating shafts (55) of the first dehumidifying rotating wheel (51) and the second dehumidifying rotating wheel (52) are in telescopic connection through a group of electric telescopic rods (58);
the cold coil section (3) comprises a third shell (31), a rear surface cold coil (32) arranged at the foremost end in the third shell (31), a deep cold coil (33) arranged behind the rear surface cold coil (32), and a middle-effect filter (34) arranged behind the deep cold coil (33).
2. The aircraft testing fresh air temperature control system according to claim 1, wherein the dehumidifying blade (57) is made of paper material, a plurality of honeycomb-shaped small holes are formed in the dehumidifying blade (57), the thickness of the dehumidifying blade (57) is larger than that of the first annular steel sleeve (53) and that of the second annular steel sleeve (54), and the dry specific gravity of the dehumidifying blade (57) is 240kg/m3。
3. The aircraft testing full fresh air temperature control system according to claim 1, wherein the number of the drying fans (22) is two, the two drying fans are respectively located at the front end and the rear end of the second shell (21), drying coils (23) are arranged inside the drying fans (22), one drying fan (22) is located above the first shell (11), the other drying fan (22) is located above the third shell (31), and openings (24) are arranged at positions of the second shell (21) corresponding to the two drying fans (22).
4. The aircraft testing full fresh air temperature control system according to claim 1, wherein the driving assembly (6) comprises a driving motor (61), a driving wheel (62) connected with the output end of the driving motor (61), a first fixing rod (63) fixedly connected with the top of the driving motor (61), and a second fixing rod (64) rotatably connected with the driving wheel (62);
drive runner (62) periphery is equipped with a plurality of lugs (621) along circumference equidistant, lug (621) and adjacent two sets of space between connecting rod (56) corresponds the cooperation and connects, driving motor (61) are located drive runner (62) front end center department, drive runner (62) rear end center department through a set of dwang (622) with second dead lever (64) lower part rotates and connects, first dead lever (63) and second dead lever (64) top all with the interior top surface fixed connection of second casing (21).
5. The aircraft testing fresh air temperature control system according to claim 4, wherein the support assemblies (7) comprise an auxiliary rotating wheel (71) with the same structure as the driving rotating wheel (62), a base (72) located below the auxiliary rotating wheel (71), triangular plates (74) located on two sides of the base (72), and a groove (73) located above the base (72) and used for accommodating the auxiliary rotating wheel (71), and a pulley (75) is arranged below the bases (72) of the two groups of support assemblies (7) of the second dehumidifying rotating wheel (52).
6. The fresh air temperature control system for aircraft testing according to claim 5, wherein a water outlet hose (76) is provided between the auxiliary runner (71) and the groove (73), a nozzle (77) is provided at one end of the water outlet hose (76) corresponding to the inner side of the dehumidifying runner set (5), a water supply pipe (78) is connected to one end of the water outlet hose (76) corresponding to the outer side of the dehumidifying runner set (5), and two water outlet hoses (76) located at the same side of the first dehumidifying runner (51) and the second dehumidifying runner (52) are connected to the same water supply pipe (78).
7. The aircraft testing fresh air temperature control system according to claim 1, wherein the electric telescopic rod (58) comprises a fixed section (581), a telescopic section (582) and a connecting rod (583) fixedly connected with the middle of the fixed section (581), the fixed section (581) is connected with a rotating shaft (55) of a first dehumidifying rotating wheel (51), the telescopic section (582) is connected with a rotating shaft (55) of a second dehumidifying rotating wheel (52), the upper end of the connecting rod (583) is fixedly connected with the inner top surface of the second shell (21), a guide plate (59) is sleeved on the lower portion of the connecting rod (583), the guide plate (59) comprises a sleeve plate (591) and an inner plate (592) which is positioned inside the sleeve plate (591) and is slidably connected with the sleeve plate (591), the inner plate (592) is fixedly connected with the rear section of the telescopic section (582) through a supporting rod (593), the position of the center of the inner plate (592) corresponding to the connecting rod (583) is provided with a slot (594).
8. The aircraft testing fresh air temperature control system according to claim 1, wherein a first sealing door (25) is arranged at the joint of the second shell (21) and the first shell (11), a second sealing door (26) is arranged at the joint of the second shell (21) and the third shell (31), a first pressure gauge (15) is arranged inside the first shell (11), and a second pressure gauge (35) and a temperature gauge (36) are arranged inside the third shell (31).
9. The control method of the aircraft testing full fresh air temperature control system according to any one of claims 1 to 8, characterized by comprising the following steps:
s1, air volume control: the blower (14) is started through the control module (4), the internal pressure of the first shell (11) and the third shell (31) is monitored, the differential pressure is calculated, a differential pressure feedback signal is input into the control module (4), a PLC (programmable logic controller) of the control module (4) outputs a control signal after PID (proportion integration differentiation) control is carried out, and the control signal controls the increase or decrease of the air volume of the blower (14) so as to change the air volume;
s2, dehumidification by a rotating wheel: the air blown out by the blower (14) is dehumidified through the first dehumidifying rotating wheel (51) and the second dehumidifying rotating wheel (52) which rotate synchronously in opposite directions, the dehumidifying rotating wheel set (5) rotates at the rotating speed of 8-12r/h to enable the dehumidifying blades (57) to rotate to an air channel of an upper drying fan (22) from the lower part of the rotating wheel dehumidifying section (2), the drying fan (22) blows dry air into the dehumidifying rotating wheel set (5), the dehumidifying rotating wheel set (5) continuously rotates to contact with the outside air for drying, and meanwhile the air volume of the drying fan (22) is synchronously adjusted through the control module (4) and the control signal in the step S1;
s3, temperature adjustment: monitoring the temperature of air supplied inside the third shell (31) through a thermometer (36), comparing the temperature with a set temperature value, performing PID (proportion integration differentiation) control through a PLC (programmable logic controller) of the control module (4), then adjusting the cold water flow through a water valve of the surface cooling coil (32) to adjust the air supply temperature, and performing PID control on the water valve of the deep cooling coil (33) to adjust the cold water flow to perform deep cooling when the dew point temperature is lower than or equal to the set temperature of minus 15 ℃ to minus 10 ℃;
s4, cleaning the dehumidifying rotating wheel set (5): after the air supply in the steps S1-S3 is finished, the first sealing door (25) and the second sealing door (26) are closed, the water outlet hose (76) is installed in the base (72), water is supplied into the water supply pipe (78) through the water pump, the water outlet hose (76) is intermittently pressurized through the auxiliary runner (71), and the dust attached to the dehumidifying runner set (5) is cleaned through the nozzle (77).
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