CN109060392A - A kind of gas pressure loads pilot system of controllable temperature - Google Patents
A kind of gas pressure loads pilot system of controllable temperature Download PDFInfo
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- CN109060392A CN109060392A CN201810819440.8A CN201810819440A CN109060392A CN 109060392 A CN109060392 A CN 109060392A CN 201810819440 A CN201810819440 A CN 201810819440A CN 109060392 A CN109060392 A CN 109060392A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/007—Subject matter not provided for in other groups of this subclass by applying a load, e.g. for resistance or wear testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
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Abstract
The invention discloses a kind of gas pressure loads pilot systems of controllable temperature, including the experimental cabin mounting bracket (13) being disposed vertically；The front upper of the experimental cabin mounting bracket (13) is equipped with hollow gas pressure test cabin (10)；The inside of the gas pressure test cabin (10) is fixedly installed the testpieces in need tested and is fixedly connected；Front the right and left of the gas pressure test cabin (10) is open respectively is equipped with a grid heat exchanger (9)；Back side the right and left of the gas pressure test cabin (10) is separately installed with a load piston (18)；The grid heat exchanger (9) and the gas outlet (100) for loading piston (18) front end are just being correspondingly arranged.The present invention reliably can apply gas pressure loads and temperature loading to equipment windward, meet and the environmental load test demand of equipment windward is conducive to extensive production application, is of great practical significance to reliably examine the performance of equipment windward.
Description
Technical field
The present invention relates to mechanical test technical fields, more particularly to a kind of gas pressure loads pilot system of controllable temperature.
Background technique
Currently, to be examined to product, becoming inspection by the product practical service environment in laboratory simulation and producing
Moral character energy effectively has section, and how correctly effectively to simulate the environmental load being subject in product actual use becomes environmental test
Key point.
For the large area such as building doors and windows, train covering, door and window and aircraft skin equipment windward, they are being used
The environmental load that period mainly faces is the gas pressure loads and temperature loading for directly acting on its outer surface.
But there is presently no a kind of technologies, it can be reliably to building doors and windows, train covering, door and window and aircraft
Equipment applies gas pressure loads and temperature loading to covering etc. windward, meets and tests demand to the environmental load of equipment windward, so as to
The performance of equipment windward is examined by ground.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of gas pressure loads pilot system of controllable temperature, it can be reliably
To building doors and windows, train covering, door and window and aircraft skin etc., equipment applies gas pressure loads and temperature loading windward, meets to meeting
The environmental load test demand of wind devices is conducive to extensive production application to reliably examine the performance of equipment windward, has
There is great production practices meaning.
For this purpose, the present invention provides a kind of gas pressure loads pilot system of controllable temperature, including the experimental cabin peace being disposed vertically
Fill bracket；
The front upper of the experimental cabin mounting bracket is equipped with hollow gas pressure test cabin；
The inside in the gas pressure test cabin is fixedly installed the testpieces in need tested and is fixedly connected；
The front the right and left in the gas pressure test cabin is open respectively is equipped with a grid heat exchanger；
The back side the right and left in the gas pressure test cabin is sealed and installed with a load piston respectively；
The gas outlet of the grid heat exchanger and load piston nose is just correspondingly arranged.
Wherein, the front in the gas pressure test cabin is provided with a pressure sensor；
Temperature sensor is pasted on the testpieces.
Wherein, the front the right and left in the gas pressure test cabin also has a pressurization mouth and pressure-reduction outlet, described to add
Pressure mouth and pressure-reduction outlet are connected with the inflating port of pressure compensator and air entry respectively；
The grid heat exchanger is connected with a temperature controller by hollow pipeline.
Wherein, each load piston includes hollow load piston shell；
The load piston shell front opening forms gas outlet；
The load piston shell front end is connect with the sealing backside in the gas pressure test cabin；
The load piston shell inner front side is provided with hollow out valve plate, and the rear side of the hollow out valve plate has cross direction profiles
, hollow valve stem spacing cylinder；
It is extended transversely through in the valve stem spacing cylinder and is provided with a threaded stem；
The front end of the threaded stem protrudes from the front side of hollow out valve plate and is fixedly connected with a sealing valve plate, the screw thread
The rear end of valve rod protrudes from the rear side of valve stem spacing cylinder and is threadedly coupled a locking nut；
The sealing valve plate and the load piston shell are tightly connected, and it is closed to form hollow piston between the two
Gas chamber；
The rear end of the threaded stem is connected by a piston connecting shaft with a servo electric jar.
Wherein, the pressure compensator includes air compressor, vacuum pump, pressure-air storage tank, negative pressure air storage tank, adds
Pressure electromagnetic valve and vacuum solenoid valve；
Wherein, the air-out of air compressor is connected with the air-in of pressure-air storage tank, pressure-air
The air-out of storage tank is connected by pressurization solenoid valve with pressurization mouth；
The air-out of vacuum pump is connected with the air-in of negative pressure air storage tank, the air of negative pressure air storage tank
Delivery outlet is connected by vacuum solenoid valve with pressure-reduction outlet；
The temperature controller includes hot oil temperature controller, heating fuel tank (inside setting resistive heater), circulating pump, entrance
Solenoid directional control valve, outlet solenoid directional control valve, low-temperature solenoid valve, liquid nitrogen container and nitrogen gas generator；
Wherein, hot oil temperature controller is connected with heating fuel tank, for controlling the resistive heater pair in heating fuel tank
The hydraulic oil stored in heating fuel tank is heated；
Heating fuel tank is connected with entrance solenoid directional control valve and circulating pump respectively, the circulating pump and outlet electromagnetic switch
First import of valve is connected；
The liquid nitrogen container passes sequentially through low-temperature solenoid valve, nitrogen gas generator is connected with the second import of outlet solenoid directional control valve
It is logical；
The outlet of outlet solenoid directional control valve is connected with the import of grid heat exchanger；
The outlet of grid heat exchanger is connected with entrance solenoid directional control valve.
Wherein, the back side the right and left in the gas pressure test cabin is fixedly installed the electric cylinder peace an of genesis analysis respectively
Fill bracket；
The rear end of the electric cylinder mounting bracket is fixedly installed electric cylinder pinboard；
Servo electric jar is fixedly installed on the electric cylinder pinboard；
Displacement sensor is provided in the servo electric jar.
Wherein, the close of annular is provided between the edge of the hollow out valve plate and the inner wall of the load piston shell
Block ring；
Piston shell inner wall two sides above and below the front end of the seal stopper ring are further fixedly arranged on two baffle ring screws.
Wherein, the edge of the hollow out valve plate is also cased with the first close of annular in the position being located on rear side of seal stopper ring
Seal necklace；
The valve stem spacing drum outer wall is cased with the second sealing of annular in the position close to inner wall on the right side of the piston shell
Necklace；
More clamping screws are provided between inner wall on the right side of the right side of the hollow out valve plate and the piston shell；
Multiple tapped through holes are provided on the load piston shell right side wall；
The right end of the tapped through hole and clamping screw is correspondingly arranged, and is located along the same line.
Wherein, multiple piston stomatas are provided on the load piston shell right side wall, the pressure compensator passes through gas
Pipe is connected to piston stomata.
Wherein, further includes: integrated controller, the integrated controller respectively with pressure sensor, temperature sensor, displacement
Sensor, pressure compensator, temperature controller, servo electric jar are connected by signal wire, for receiving the pressure sensing
Barometric information in the gas pressure test cabin of device feedback, the temperature data in the gas pressure test cabin of temperature sensor feedback and displacement
The displacement data of the servo electric jar of sensor feedback, and by send control signal, to pressure compensator, temperature controller and
The working condition of servo electric jar is controlled.
By the above technical solution provided by the invention as it can be seen that compared with prior art, the invention proposes a kind of controllable
The gas pressure loads pilot system of temperature, can reliably set building doors and windows, train covering, door and window and aircraft skin etc. windward
It is standby to apply gas pressure loads and temperature loading, meet and demand is tested to the environmental load of equipment windward, to reliably examine windward
The performance of equipment is conducive to extensive production application, is of great practical significance.
Detailed description of the invention
Fig. 1 is a kind of schematic perspective view of the gas pressure loads pilot system of controllable temperature provided by the invention；
Fig. 2 is stereochemical structure when a kind of gas pressure loads pilot system of controllable temperature provided by the invention is observed from back to front
Schematic diagram；
Fig. 3 is the cross-section structure signal of piston of jumping a queue in a kind of gas pressure loads pilot system of controllable temperature provided by the invention
Figure；
Fig. 4 is the piston of jumping a queue that piston has of jumping a queue in a kind of gas pressure loads pilot system of controllable temperature provided by the invention
The schematic perspective view of shell；
Fig. 5 is the hollow out valve plate that piston has of jumping a queue in a kind of gas pressure loads pilot system of controllable temperature provided by the invention
Schematic perspective view；
Fig. 6 is the sealing valve plate that piston has of jumping a queue in a kind of gas pressure loads pilot system of controllable temperature provided by the invention
Schematic perspective view；
Fig. 7 is pressure compensator and integrated controller in a kind of gas pressure loads pilot system of controllable temperature provided by the invention
With the attachment structure schematic diagram of pressurization mouth, the mouth that pressurizes in air pressure experimental cabin；
Fig. 8 is temperature controller and integrated controller in a kind of gas pressure loads pilot system of controllable temperature provided by the invention
With the attachment structure schematic diagram of the grid heat exchanger in air pressure experimental cabin；
In figure, 4 be pressure compensator, and 5 be pressure sensor, and 6 be temperature controller, and 9 be grid heat exchanger, and 10 be air pressure
Experimental cabin, 11 be pressurization mouth, and 12 be pressure-reduction outlet, and 13 be experimental cabin mounting bracket, and 14 be servo electric jar；
15 be electric cylinder pinboard, and 16 be electric cylinder mounting rack, and 17 be piston connecting shaft, and 18 be load piston, and 19 be to add
Piston shell is carried, 20 be hollow out valve plate, and 21 be sealing valve plate, and 221 be the first sealing necklace, and 222 be the second sealing necklace, and 22 are
Tapped through hole, 24 be threaded stem；
25 be locking nut, and 26 be clamping screw, and 27 be piston sealed gas chamber, and 28 be seal stopper ring, and 29 be baffle ring screw,
30 be piston stomata；
100 be gas outlet, and 200 be valve stem spacing cylinder.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, with reference to the accompanying drawing with embodiment to this
Invention is described in further detail.
Referring to Fig. 1, a kind of gas pressure loads pilot system of controllable temperature provided by the invention is mainly used for building door
Equipment applies gas pressure loads and temperature loading windward for window, train covering, door and window and aircraft skin etc., specifically includes and is disposed vertically
Experimental cabin mounting bracket 13；
The front upper of the experimental cabin mounting bracket 13 is equipped with hollow gas pressure test cabin 10；
The inside in the gas pressure test cabin 10 is fixedly installed that the testpieces in need tested is fixedly connected (specifically can be with
For the equipment windward such as building doors and windows, train covering, door and window and aircraft skin)；
The front the right and left in the gas pressure test cabin 10 is open respectively is equipped with a grid heat exchanger 9；
The back side the right and left in the gas pressure test cabin 10 is sealed and installed with a load piston 18 respectively；
The gas outlet 100 of the grid heat exchanger 9 and load 18 front end of piston is just correspondingly arranged.
In the present invention, in specific implementation, the front in the gas pressure test cabin 10 is provided with a pressure sensor 5.
In the present invention, in specific implementation, inside the gas pressure test cabin 10 by mounting flange with tested
Testpieces be fixedly connected.
In the present invention, in specific implementation, the front the right and left in the gas pressure test cabin 10 also has one and adds
Press mouth 11 and pressure-reduction outlet 12, the pressurization mouth 11 and pressure-reduction outlet 12 inflating port and air entry with a pressure compensator 4 respectively
It is connected (by hollow pipeline).
In the present invention, in specific implementation, the grid heat exchanger 9 and a temperature controller 6 pass through hollow pipeline
(specially heatproof pipeline) is connected.
In the present invention, in specific implementation, it is pasted with temperature sensor on the testpieces, for acquiring gas pressure test cabin
Temperature information inside 10.
In the present invention, each load piston 18 includes hollow load piston shell 19；
19 front opening of load piston shell forms gas outlet 100；
Load 19 front end of piston shell is connect with the sealing backside in the gas pressure test cabin 10；
19 inner front side of load piston shell is provided with hollow out valve plate 20, and the rear side of the hollow out valve plate 20 has cross
To distribution, hollow valve stem spacing cylinder 200；
It is extended transversely through in the valve stem spacing cylinder 200 and is provided with a threaded stem 24；
The front end of the threaded stem 24 protrudes from the front side of hollow out valve plate 20 and is fixedly connected with a sealing valve plate 21, institute
The rear end for stating threaded stem 24 protrudes from the rear side of valve stem spacing cylinder 200 and is threadedly coupled a locking nut 25；
The sealing valve plate 21 is tightly connected with the load piston shell 19 (specifically in the edge of sealing valve plate 21
It is cased with sealing necklace, which omits), and hollow piston sealed gas chamber 27 is formed between the two.
In specific implementation, the rear end of the threaded stem 24 passes through a piston connecting shaft 17 and a servo electric jar 14
It is connected.
In specific implementation, the back side the right and left in the gas pressure test cabin 10 is fixedly installed a genesis analysis respectively
Electric cylinder mounting bracket 13；
The rear end of the electric cylinder mounting bracket 13 is fixedly installed electric cylinder pinboard 15；
Servo electric jar 14 is fixedly installed on the electric cylinder pinboard 15；
Displacement sensor is provided in the servo electric jar 14.
In specific implementation, it is arranged between the edge of the hollow out valve plate 20 and the inner wall of the load piston shell 19
There is the seal stopper ring 28 of annular.
In specific implementation, 19 inner wall of piston shell is also fixedly installed two sides above and below the front end of the seal stopper ring 28
There are two baffle ring screws 29.
In specific implementation, the edge of the hollow out valve plate 20 is also cased with ring in the position for being located at 28 rear side of seal stopper ring
First sealing necklace 221 of shape；
200 outer wall of valve stem spacing cylinder is cased with the second of annular in the position close to the 19 right side inner wall of piston shell
Seal necklace 222.
In specific implementation, more are provided between the 19 right side inner wall of right side and the piston shell of the hollow out valve plate 20
Clamping screw 26；
Multiple tapped through holes 23 are provided on 19 right side wall of load piston shell；
The right end of the tapped through hole 23 and clamping screw 26 is correspondingly arranged, and is located along the same line.
In specific implementation, multiple piston stomatas 30 are provided on 19 right side wall of load piston shell, the pressure is mended
It repays device 4 and piston stomata 30 is connected to by tracheae.
In the present invention, for pilot system provided by the invention, further includes: integrated controller, the integrated controller
It is logical with pressure sensor, temperature sensor, displacement sensor, pressure compensator 4, temperature controller 6, servo electric jar 14 respectively
It crosses signal wire to be connected, the barometric information in gas pressure test cabin 10 for receiving the pressure sensor feedback, temperature sensing
The displacement data of the servo electric jar 14 of temperature data and displacement sensor feedback in the gas pressure test cabin 10 of device feedback, and
Signal is controlled by sending, the working condition of pressure compensator 4, temperature controller 6 and servo electric jar 14 is controlled, example
Such as include: control pressure compensator 4 respectively by pressurization mouth 11 and pressure-reduction outlet 12, exports positive pressure or negative pressure to gas pressure test
Cabin；Control temperature controller 6 exports the hot oil of default high temperature or the ammonia of default low temperature to grid heat exchanger 9；And control
The stretching motion of servo electric jar 14.
It should be noted that main test object is door and window or stressed-skin construction, testpieces structure type for the present invention
It is planar structure, testpieces is fixed on inside gas pressure test cabin 10 by mounting flange, the pressure in control pressure experimental cabin 10
Power and temperature achieve the purpose that test testpieces.
For the present invention, the production principle of air pressure waveform is gas Boyle's law, by the volume for changing sealing gas
Or change and seal intracorporal gas flow, to change air pressure.
In the present invention, air pressure waveform is realized by two bigbore load pistons 18, loads piston by sealing valve plate 21
Two parts are divided into, a part is piston sealed gas chamber 27, and another part is connect with gas pressure test cabin 10, piston sealed gas chamber
Adjustable sealing state can bear the gas pressure of ± 0.6MPA when being fully sealed.The actuating length of sealing valve plate 21, can be with
The entire load internal piston of covering, while sealing valve plate 21 can stretch out, to realize piston sealed gas chamber 27 and gas pressure test
Connection between cabin 10.
It should be noted that test actuating system is made of two servo electric jars 14, servo electric jar for the present invention
14 are connect by electric cylinder mounting bracket 16 with the back side in gas pressure test cabin 10, can by servo controller and integrated controller into
Row control, servo electric jar drive load piston 18 to generate linear reciprocating motion；The actuation control of servo electric jar is controlled by comprehensive
Device processed, displacement sensor, servo electric jar composition.
It should be noted that for this valve, for pressure compensator therein, when carrying out pressure fatigue test, pressure
Compensator can compensate the pressure zero bias as caused by temperature change and system sealing in pressure chamber.Carrying out pressure punching
When hitting test, pressure compensator can be pressurizeed or be taken out pressure to piston sealed gas chamber 27.
In specific implementation, the pressure compensator includes air compressor, vacuum pump, pressure gauge and solenoid valve, described
Air compressor, vacuum pump, pressure gauge and solenoid valve pass sequentially through hollow pipeline and are connected, and steady positive/negative-pressure may be implemented
Power output and switch control.
In specific implementation, the pressure testing and controlling of pilot system of the invention is by integrated controller, pressure sensor, pressure compensation
Device composition.
For the present invention, the temperature loading of pilot system of the invention is applied by the mode of gas heat exchange, mainly by
Two grid heat exchangers being located at load piston outlet are realized.When hot test, it is passed through in heat exchanger and is produced by temperature controller
Raw constant temperature high temperature oil, by two groups of load pistons respectively with amplitude same frequency counteragent, so that gas flows in sealed compartment,
Air-flow passes through grid heat exchanger, completes heat exchange, quickly completes testpieces heating.When low-temperature test, it is passed through in grid heat exchanger
To seal with amplitude same frequency counteragent respectively by two groups of load pistons by the low temperature nitrogen that temperature controller generates
Gas flows in cabin, and air-flow passes through grid heat exchanger and completes heat exchange, quickly completes testpieces cooling.
In specific implementation, temperature controller is made of high-temperature hot oil output system and low temperature liquid nitrogen output system.High temperature carries
Lotus is controlled by changing hot oil temperature, low temperature load is controlled by changing low temperature nitrogen make-and-break time.
In specific implementation, the measurement and control of temperature of pilot system of the invention is controlled by integrated controller, temperature sensor, temperature
Device composition.
In specific implementation, the integrated controller is programmable controller PLC, central processor CPU, Digital Signal Processing
Device DSP or single-chip microprocessor MCU.
Shown in Figure 7, for the present invention, the pressure compensator 4 includes air compressor, vacuum pump, pressure-air
Storage tank, negative pressure air storage tank, pressurization solenoid valve and vacuum solenoid valve；
Wherein, the air-out of air compressor is connected with the air-in of pressure-air storage tank, pressure-air
The air-out of storage tank is connected by pressurization solenoid valve with pressurization mouth 11；
The air-out of vacuum pump is connected with the air-in of negative pressure air storage tank, the air of negative pressure air storage tank
Delivery outlet is connected by vacuum solenoid valve with pressure-reduction outlet 12；
Wherein, the integrated controller is connected with pressurization solenoid valve and vacuum solenoid valve respectively, adds for specifically controlling
The opening and closing of pressure electromagnetic valve and vacuum solenoid valve, so that the on-off control of gas circuit is carried out, so that high pressure gas is realized at air compressor end
The on-off of body, and the gas on-off for making vacuum pump end realize negative pressure.
It should be noted that for the present invention, by integrated controller to the air compressor and vacuum in pressure compensator 4
Pump carries out pressure setting, controls air compressor and vacuum pump and reaches the air pressure in two air reservoirs of high pressure and negative pressure
Target value controls pressurization solenoid valve and vacuum solenoid valve by integrated controller when needing to carry out pressure or decompression compensation, so that
Pressure-air storage tank and negative pressure air storage tank are respectively connected with logical, progress with pressurization mouth 11, the pressure-reduction outlet 12 in gas pressure test cabin 10
Pressurization or decompression compensation.
Shown in Figure 8, for the present invention, the temperature controller 6 is (interior including hot oil temperature controller, heating fuel tank
If resistive heater), circulating pump, entrance solenoid directional control valve, outlet solenoid directional control valve, low-temperature solenoid valve, liquid nitrogen container and nitrogen hair
Raw device；
Wherein, hot oil temperature controller is connected with heating fuel tank, for controlling the resistive heater pair in heating fuel tank
The hydraulic oil stored in heating fuel tank is heated, and is specifically as follows: sending switch control signal, control is located at resistive heater
Relay switch between external power supply is turned on or off, and realizes that control is turned on or off resistive heater；
Heating fuel tank is connected with entrance solenoid directional control valve and circulating pump respectively, the circulating pump and outlet electromagnetic switch
First import of valve is connected；
The liquid nitrogen container passes sequentially through low-temperature solenoid valve, nitrogen gas generator is connected with the second import of outlet solenoid directional control valve
It is logical；
The outlet of outlet solenoid directional control valve is connected with the import of grid heat exchanger 9；
The outlet of grid heat exchanger 9 is connected with entrance solenoid directional control valve.
It should be noted that temperature controller mainly has heating and refrigeration two parts, and heating part is by adding for the present invention
Hot oil case, hot oil temperature controller, resistive heater, circulating pump, solenoid valve are constituted, by integrated controller, to control heating
Fuel tank carries out heating heating according to set temperature, by outlet solenoid directional control valve and circulating pump, hot oil can be input to grid
Heat exchanger 9.Liquid nitrogen container is full of liquid nitrogen, liquid nitrogen container passes through in test by liquid nitrogen container, low-temperature solenoid valve composition by refrigerating part
Nitrogen gas generator can rely on environment temperature, and liquid nitrogen is gasificated as rapidly low temperature nitrogen.In low temperature load, controlled by comprehensive
Device processed, control open outlet solenoid directional control valve, liquid nitrogen container are connected with grid heat exchanger 9, realizes the entrance of cryogenic gas.
The hot oil temperature controller is specifically as follows programmable controller PLC, central processor CPU, at digital signal
Manage device DSP or single-chip microprocessor MCU.
In order to export the hot oil of default high temperature to grid heat exchanger 9, to be internally heated to gas pressure test cabin 10.Tool
Body realizes process are as follows: carries out target temperature setting, hot oil to the hot oil temperature controller in temperature controller by integrated controller
Temperature controller controls heating fuel tank, is heated by resistance wire to the hydraulic oil in heating fuel tank, at this time by circulating pump one
Straight row oil circulation, when outlet solenoid directional control valve is not acted, circulating pump follows the hydraulic oil inside heating fuel tank
Ring, integrated controller control outlet solenoid directional control valve realize the filling of hot oil so that circulating pump is connected with grid heat exchanger 9,
Integrated controller controls entrance solenoid directional control valve and forms being recycled back to for hot oil so that grid heat exchanger 9 is connected with heating fuel tank
Road.
In order to export the hot oil of default low temperature to grid heat exchanger 9, thus to freezing inside gas pressure test cabin 10.Tool
Body realizes process are as follows: it is opened by integrated controller control low-temperature solenoid valve, so that the liquid nitrogen in liquid nitrogen container flows into nitrogen gas generator,
Nitrogen gas generator is as heat exchange generator, and liquid nitrogen flows into the heat exchanger plates in nitrogen gas generator, by environment temperature transient evaporation
Generate a large amount of low temperature nitrogen.Integrated controller control control outlet solenoid directional control valve, so that grid heat exchanger 9 and nitrogen occur
Device is connected, and is passed through the nitrogen of low temperature, and integrated controller controls entrance solenoid directional control valve, so that the nitrogen of low temperature is discharged into air,
Form the nitrogen access of low temperature.
For the present invention, three kinds of different control methods can be taken for test battery equipment, can met simultaneously
Air pressure fatigue, there are also the applications of high-speed pneumatic shock environment for low speed air pressure impact.It is described as follows:
1, when carrying out air pressure fatigue test and low speed air pressure impact (the air pressure change time is more than or equal to 50ms), by loading
Piston 18 is connected to gas pressure test cabin 10, and load piston 18 moves in a straight line, to change the volume of internal gas, wants to generate
The gas pressure asked.
2, when carrying out high-speed pneumatic impact test (the air pressure change time is less than 50ms), due to needing to generate instantaneous gas
Body pressure change, simple generates the requirement that volume change is not able to satisfy action time by piston motion, pressure punching at this time
Hitting is that the sealed gas chamber for loading pistons to two by pressure compensator is inflated and air-breathing (by piston stomata 30) respectively,
A load piston 18 is set to generate larger positive pressure, another load piston 18 generates larger negative pressure, when on-test, comprehensive control
Device processed is by carrying out displacement commands control to servo electric jar 14, so that the sealing valve plate 21 that one loads piston 18 be pushed away rapidly
Enter in gas pressure test cabin 10, so that gas pressure test cabin 10 is connected with piston sealed gas chamber 27, by Boyle's law it is found that at this time
Pressure can change rapidly in sealed compartment, and when air pressure change to peak value, integrated controller issues control instruction, another is loaded
Push-in sealed compartment, the pressure loaded in piston 18 due to two are positive and negative on the contrary, two loads work rapidly for the sealing valve plate 21 of piston
After plug 18 is connected to simultaneously, the pressure in gas pressure test cabin 10 is restored rapidly, to achieve the effect that compression shock.
3, when carrying out low speed air pressure impact (air pressure working time of collision is more than or equal to 50ms) test, pressure control is
PID closed-loop control, since pressure change is directly proportional to change in displacement, integrated controller is first with constant displacement to servo electric jar
14 displacement is controlled, and System self-test is completed, and System self-test can effectively check system mechanics failure and system acquisition event
The problems such as barrier, and the pid parameter of corresponding pressure control can be calculated by pressure value and controller output valve.Applying pressure
Pid control parameter carries out pressure closed loop Control experiment, realizes the application of different wave, reaches air pressure impact test effect.
4, when carrying out air pressure fatigue test, since temperature change and system sealing cause stress zero bias, when closed-loop control
Servo electric jar can be made displacement zero bias occur for compensation pressure zero bias, long-play can make servo electric jar displacement transfinite
There is locking situation.In order to avoid locking situation exports the displacement period fortune of constant amplitude by carrying out PI control to displacement
It is dynamic, since pressure is directly proportional to displacement, then necessarily obtain the pressure waveform of mechanical periodicity.Adjusting output displacement amplitude and frequency makes
The frequency of corrugating of bringing about the desired sensation and peak peak pressure difference reach test requirements document.Pressure in sealed compartment is compensated by pressure compensating system
To adjust the equilbrium position of air pressure waveform, so that air pressure waveform reaches test requirements document.
In addition, when carrying out high-speed pneumatic impact test (the air pressure change time is less than 50ms), the control of integrated controller
Using open loop policy.Testpieces is replaced to be debugged with sealing steel plate before test, by adjusting sealed gas chamber in load piston
Gas pressure adjusts the pressure peak of air pressure impact.By adjusting the movement velocity of servo electric jar, the buck of waveform is adjusted
Time.It is poor by the actuation time for adjusting two valve plates, adjust the surge pressure retention time.It is required when test surge waveform reaches
Afterwards, adjustment parameter is recorded, replacement testpieces is tested.
Therefore, the present invention is based on Boyle's laws realizes the sum of gas pressure loads using servo electric jar and load piston
The accurate application of temperature loading.The servo electric jar that the present invention uses has structure simple, and low in cost, reliability height etc. is excellent
Point, a whole set of testing equipment cost control are preferable.
For the gas pressure loads pilot system of controllable temperature provided by the invention, specific assembling process is as follows:
Firstly, grid heat exchanger 9, pressure sensor 5 to be fixed to the inner wall in gas pressure test cabin 10；
Then, gas pressure test cabin 10 is fixed in experimental cabin mounting bracket 13；
Then, sealing valve plate 21 is packed into hollow out valve plate 20, in threaded stem 24 and screws lock for 25 sets of locking nut
Tightly, so that sealing valve plate 21 and hollow out valve plate 20 are fitted close；
Then, two pieces of valve plates after combination are fitted into load piston shell 19, by baffle ring screw 29 by seal stopper ring
28 are limited in piston sealed gas chamber 27；
Then, fine adjustments fit-up gap and filling lubricant grease guarantee the first sealing necklace 221 and the second sealing necklace
222 sealings and lubrication are good.
Then, rear portion of the installation of piston 18 to gas pressure test cabin 10 will be loaded, so that load piston 18 and gas pressure test cabin
10 inner space is connected；
Then, servo electric jar 14 is fixed on electric cylinder pinboard 15, and is installed by electric cylinder mounting bracket 13
To the back side in gas pressure test cabin 10；
Then, servo electric jar 14 is connect by piston connecting shaft 17 with the threaded stem 24 loaded on piston 18；
Then, grid heat exchanger 9 is connected with temperature controller 6 by heatproof pipeline；
Then, it will be pressurizeed mouth (11) by gas piping, pressure-reduction outlet (12) is connect with pressure compensator (4)；
Finally, passing through shielded cable for servo electric jar 14, displacement sensor, pressure compensator 4, pressure sensor 5, temperature
Degree controller, temperature sensor are connected to integrated controller, carry out operation control to these components by integrated controller.
In order to which the present invention is more clearly understood, below just working method of the invention be illustrated:
One, the working method for carrying out air pressure fatigue test is as follows:
1, testpieces is fixed on gas pressure test cabin 10 by mounting flange；
2, temperature sensor is affixed on testpieces；
3, integrated controller sends control signal, controls two servo electric jars 14 and carries out periodic motion in the same direction, servo
Displacement sensor 3 built in electric cylinder 14 feeds back displacement information to integrated controller, and integrated controller carries out PID control to displacement
System；
4, according to Boyle's law, servo electric jar 14 drives load piston 18 to work, so that producing in gas pressure test cabin 10
Raw is in the gas pressure of mechanical periodicity；
5, pressure sensor 5 is by collected pressure value, Real-time Feedback to integrated controller, and two, integrated controller section
The motion amplitude and frequency of servo electric jar 14, so that the waveform of the test pressure in gas pressure test cabin 10, frequency, peak difference arrive
Up to goal-selling requirement；
If causing gas pressure test cabin 10 to generate pressure zero bias 6, due to temperature change and system sealing,
7, collected pressure value is fed back to integrated controller 1 by pressure sensor 5, and integrated controller 1 calculates zero
Biasing force, integrated controller 1 export control signal to pressure compensator 4, control pressure compensator 4 and export positive pressure or negative pressure extremely
10 the inside of gas pressure test cabin, so that the pressure zero curve position in gas pressure test cabin 10 reaches requirement, finally reaches pressure waveform
To target call.
8, after pressure waveform reaches target call, integrated controller issues temperature controller 6 and instructs, it is made to export constant temperature
Hot oil or low temperature nitrogen are to grid heat exchanger 9；
9, temperature controller 6 collects temperature change, temperature value is fed back to integrated controller, integrated controller is according to temperature
Collection value is spent, to control the hot oil temperature of the output of temperature controller 6 or the on-off of low temperature nitrogen, formation temperature closed-loop control.
Two, working method when carrying out low speed air pressure impact test is as follows:
1, testpieces is fixed on gas pressure test cabin 10 by mounting flange；
2, temperature sensor is affixed on testpieces；
3, integrated controller controls two servo electric jars 14 and is moved, so that two servo electric jars 14 carry out reversely
Equal peak motions, servo electric jar 14 drives load piston 18, so that gas pressure test cabin, 10 inside generate the air-flow of circulation, gas
Stream blows over grid heat exchanger 9, so that testpieces surface uniformly heats up or cools down, integrated controller is controlled according to temperature collection value
The on-off of hot oil temperature or low temperature nitrogen, formation temperature closed-loop control；
4, after testpieces arrival requires temperature, self-test is carried out to pilot system, integrated controller controls two servo-electrics
Cylinder 14 is moved in the same direction, and the closed-loop control of moving displacement, output are carried out by the displacement sensor built in servo electric jar 14
The waveform of thin tail sheep passes through pressure so that generating smaller pressure (less than 30 the percent of goal pressure) in gas pressure test cabin 10
5 feedback pressure force value of force snesor is to integrated controller, thus PID gain needed for calculating pressure closed loop control.
5, after the completion of self-test, restore servo electric jar 14 to equilbrium position, restore pressure in gas pressure test cabin 10 to zero
Pressure.
6, servo electric jar 14 is controlled by integrated controller and generates movement, with the pressure that pressure sensor 5 is fed back, passed through
PID gain values obtained in process of self-test carry out the PID control of air pressure, so that test waveform reaches preset requirement.
Three, working method when carrying out high-speed pneumatic impact test is as follows:
1, testpieces is replaced with one block of closed steel plate, then carries out impact debugging；
2, by sealing valve plate 21, the two valve plates are combined with hollow out valve plate 20, are pushed at seal stopper ring 28, and compression spiral shell is used
Bar 26 passes through tapped through hole 23, and hollow out valve plate 20 is compressed.
3, locking nut 25 is unclamped, so that sealing valve plate 21 and hollow out valve plate 20 can produce relative displacement.
4, by integrated controller, control servo electric jar 14 pulls sealing valve plate 21, makes the sealing in sealing valve plate 21
Necklace compression, reaches sealing effect.
5, pressure compensator 4 is connected to piston stomata 30 by tracheae, by pressure compensator 4 toward piston sealed gas chamber
Pressure or decompression in 27.
6, it according to test pressure, pressurizes to two load one, piston, one is depressurized, and by the closed gas of piston
Pressure remained steady in room 27.
7, by integrated controller, two servo electric jars 14 is controlled and successively push sealing valve plate 21.
8, when system actuation, a sealing valve plate 21 is momentarily pushed into inside gas pressure test cabin 10, so that piston sealed gas chamber
Air pressure abrupt release in 27, pressure moment generates variation in gas pressure test cabin 10, and pressure is kept after a certain period of time, another is close
It seals valve plate 21 to be pushed into inside gas pressure test cabin 10, since pressure value is positive and negative on the contrary, two pistons in two piston sealed gas chambers 27
After sealed gas chamber 27 is interconnected by the hollow realization of gas pressure test cabin 10, pressure is zeroed in gas pressure test cabin 10, thus complete
At air pressure by zero to maximum value, rezeroed air pressure impact process.
9, by adjusting the action time and speed of action of two servo electric jars 14, so that the test buck time reaches
It is required that.
10, the pressure value in two piston sealed gas chambers 27 is adjusted, so that pressure peak when test reaches target and wants
It asks.
11, the 9th, step 10 are repeated, until test spectrum shape reaches requirement, it is formal that closed steel plate is replaced with testpieces progress
Test.
Based on above technical scheme it is found that for the present invention, it is suitable for simulation varying environment at a temperature of mesolow power (≤
Complicated air pressure environment 0.6MPa) examines the equipment windward of such as door and window, covering large area, in such as shock wave, periodical gas
Structural behaviour in the environment such as pressure fluctuation.System of the invention can be impacted with simulated implementation positive pressure, negative pressure is impacted, positive/negative-pressure circulation
Deng the load of complicated air pressure environment.The present invention can be realized precisely applies complicated gas pressure loads under different temperatures environment, realizes
Such as air pressure impact, air pressure fatigue test objective.
It is the innovative application servo electric jar of loading system, load piston, grid type heat exchanger, comprehensive for the present invention
Hop controller, pressure compensator, temperature controller, to realize the closed-loop control of pilot system temperature and pressure.
The air pressure Impulsive load of minimum 10ms may be implemented by changing the control strategy of pilot system for the present invention
With the air pressure fatigue loading of 0.1~10Hz.Pass through grid type heat exchanger, temperature controller, temperature sensor, integrated controller
Realize the temperature control function of pilot system, can with make testpieces temperature controllable within the scope of -40 DEG C~+70 DEG C, thus
A variety of air pressure-loading waveforms such as sine wave, trapezoidal wave, triangular wave at a temperature of may be implemented -40 DEG C to+70 DEG C.The present invention provides
Pilot system, overall structure stablizes, and high reliablity can be widely applied to the air pressure in the fields such as building, automobile, high-speed rail, aircraft
Impact or air pressure fatigue test.
In conclusion compared with prior art, a kind of gas pressure loads pilot system of controllable temperature provided by the invention,
It can reliably to building doors and windows, train covering, door and window and aircraft skin etc., equipment applies gas pressure loads and temperature and carries windward
Lotus meets and tests demand to the environmental load of equipment windward, to reliably examine the performance of equipment windward, is conducive to extensive
Production application is of great practical significance.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of gas pressure loads pilot system of controllable temperature, which is characterized in that including the experimental cabin mounting bracket being disposed vertically
(13)；
The front upper of the experimental cabin mounting bracket (13) is equipped with hollow gas pressure test cabin (10)；
The inside of the gas pressure test cabin (10) is fixedly installed the testpieces in need tested and is fixedly connected；
Front the right and left of the gas pressure test cabin (10) is open respectively is equipped with a grid heat exchanger (9)；
Back side the right and left of the gas pressure test cabin (10) is sealed and installed with a load piston (18) respectively；
The grid heat exchanger (9) and the gas outlet (100) for loading piston (18) front end are just being correspondingly arranged.
2. gas pressure loads pilot system as described in claim 1, which is characterized in that the front of the gas pressure test cabin (10) is set
It is equipped with a pressure sensor (5)；
Temperature sensor is pasted on the testpieces.
3. gas pressure loads pilot system as claimed in claim 2, which is characterized in that the front of the gas pressure test cabin (10) is left
Right both sides also have a pressurization mouth (11) and a pressure-reduction outlet (12), and the pressurization mouth (11) and pressure-reduction outlet (12) are respectively with one
The inflating port of a pressure compensator (4) is connected with air entry；
The grid heat exchanger (9) is connected with a temperature controller (6) by hollow pipeline.
4. gas pressure loads pilot system as claimed in claim 3, which is characterized in that each load piston (18) includes hollow
It loads piston shell (19)；
Load piston shell (19) front opening forms gas outlet (100)；
Load piston shell (19) front end is connect with the sealing backside of the gas pressure test cabin (100)；
Load piston shell (19) inner front side is provided with hollow out valve plate (20), and the rear side of the hollow out valve plate (20) has
Cross direction profiles, hollow valve stem spacing cylinder (200)；
It is extended transversely through in the valve stem spacing cylinder (200) and is provided with a threaded stem (24)；
The front end of the threaded stem (24) protrudes from the front side of hollow out valve plate (20) and is fixedly connected with a sealing valve plate (21),
The rear end of the threaded stem (24) protrudes from the rear side of valve stem spacing cylinder (200) and is threadedly coupled a locking nut (25)；
The sealing valve plate (21) and the load piston shell (19) are tightly connected, and form hollow piston between the two
Sealed gas chamber (27)；
The rear end of the threaded stem (24) is connected by a piston connecting shaft (17) with a servo electric jar (14).
5. gas pressure loads pilot system as claimed in claim 4, which is characterized in that the pressure compensator (4) includes air
Compressor, vacuum pump, pressure-air storage tank, negative pressure air storage tank, pressurization solenoid valve and vacuum solenoid valve；
Wherein, the air-out of air compressor is connected with the air-in of pressure-air storage tank, pressure-air storage tank
Air-out by pressurization solenoid valve with pressurize mouth (11) be connected；
The air-out of vacuum pump is connected with the air-in of negative pressure air storage tank, the air output of negative pressure air storage tank
Mouth is connected by vacuum solenoid valve with pressure-reduction outlet (12)；
The temperature controller (6) includes hot oil temperature controller, heating fuel tank (inside setting resistive heater), circulating pump, entrance
Solenoid directional control valve, outlet solenoid directional control valve, low-temperature solenoid valve, liquid nitrogen container and nitrogen gas generator；
Wherein, hot oil temperature controller is connected with heating fuel tank, for controlling the resistive heater in heating fuel tank to heating
The hydraulic oil stored in fuel tank is heated；
Heating fuel tank is connected with entrance solenoid directional control valve and circulating pump respectively, the circulating pump and outlet solenoid directional control valve
First import is connected；
The liquid nitrogen container passes sequentially through low-temperature solenoid valve, nitrogen gas generator is connected with the second import of outlet solenoid directional control valve；
The outlet of outlet solenoid directional control valve is connected with the import of grid heat exchanger (9)；
The outlet of grid heat exchanger (9) is connected with entrance solenoid directional control valve.
6. gas pressure loads pilot system as claimed in claim 4, which is characterized in that the back side of the gas pressure test cabin (10) is left
Right both sides are fixedly installed the electric cylinder mounting bracket (13) an of genesis analysis respectively；
The rear end of the electric cylinder mounting bracket (13) is fixedly installed electric cylinder pinboard (15)；
Servo electric jar (14) are fixedly installed on the electric cylinder pinboard (15)；
Displacement sensor is provided in the servo electric jar (14).
7. gas pressure loads pilot system as claimed in claim 4, which is characterized in that the edge of the hollow out valve plate (20)
The seal stopper ring (28) of annular is provided between the inner wall of load piston shell (19)；
Piston shell (19) inner wall is further fixedly arranged on two baffle rings in two sides up and down in the front end of the seal stopper ring (28)
Screw (29).
8. gas pressure loads pilot system as claimed in claim 4, which is characterized in that the edge of the hollow out valve plate (20)
The first sealing necklace (221) of annular is also cased in the position being located on rear side of seal stopper ring (28)；
Valve stem spacing cylinder (200) outer wall is cased with the second of annular in the position close to inner wall on the right side of the piston shell (19)
It seals necklace (222)；
More clamping screws are provided between inner wall on the right side of the right side of the hollow out valve plate (20) and the piston shell (19)
(26)；
Multiple tapped through holes (23) are provided on load piston shell (19) right side wall；
The tapped through hole (23) and the right end of clamping screw (26) are correspondingly arranged, and are located along the same line.
9. gas pressure loads pilot system as claimed in claim 4, which is characterized in that load piston shell (19) right side wall
On be provided with multiple piston stomatas (30), the pressure compensator (4) is connected to piston stomata (30) by tracheae.
10. the gas pressure loads pilot system as described in any one of claim 6 to 9, which is characterized in that further include: comprehensive control
Device processed, the integrated controller respectively with pressure sensor, temperature sensor, displacement sensor, pressure compensator (4), temperature
Controller (6), servo electric jar (14) are connected by signal wire, for receiving the gas pressure test of the pressure sensor feedback
Barometric information in cabin (10), the temperature data in the gas pressure test cabin (10) of temperature sensor feedback and displacement sensor are anti-
The displacement data of the servo electric jar (14) of feedback, and by sending control signal, to pressure compensator (4), temperature controller (6)
It is controlled with the working condition of servo electric jar (14).
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|---|---|---|---|
| CN201810819440.8A CN109060392B (en) | 2018-07-24 | 2018-07-24 | Temperature-controllable pneumatic load test system |
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|---|---|---|---|
| CN201810819440.8A CN109060392B (en) | 2018-07-24 | 2018-07-24 | Temperature-controllable pneumatic load test system |
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| CN109724788A (en) * | 2019-01-16 | 2019-05-07 | 中铁第四勘察设计院集团有限公司 | A kind of pressure decay test platform of tunnel protection door and pressure decay test device comprising it |
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| CN111811760A (en) * | 2020-08-12 | 2020-10-23 | 中国人民解放军海军工程大学 | Plate frame model strength/rigidity test system |
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