CN201777393U - Multi-parameter composite environmental test device - Google Patents

Abstract

A multi-parameter composite environmental test device comprises a centrifuge and an environmental chamber, wherein the centrifuge simulates a linear acceleration environment, and the environmental chamber mounted on an arm of the centrifuge simulates a vibrating acceleration environment, a noise environment, a temperature environment and an air pressure environment. Besides, a noise generating mechanism, a temperature control mechanism, a vibration generating mechanism, an air inlet and an exhaust hole are arranged inside the environmental chamber, the vibration generating mechanism comprises a test platform, a platform pusher rod fixed to the test platform, a deviation rectifying pusher rod, a supporting spring plate and a sensor, the wall of a composite cavity is connected with the pusher rods hermetically, the platform pusher rod is connected with a moving coil of a vibrating table, and the deviation rectifying pusher rod is connected with a deviation rectifying mechanism capable of preventing the vibration generating mechanism and the moving coil of the vibrating table from deviating excessively. The multi-parameter composite environmental test device has the advantages of capability of simulating operation environments of devices comprehensively, fine test effect and high precision.

Description

Multi-parameter compound environmental tester

Technical field

The utility model relates to a kind of multi-parameter compound environmental tester.

Technical background

Flourish along with the aerospace cause, increasing aerospace equipment puts into operation, and the components and parts on the equipment are also proposed higher reliability requirement.The working environment of these components and parts is very complicated, can be subjected to compound influence such as environmental factors such as linear acceleration, vibration acceleration, noise, temperature, air pressure as aircraft when taking off.In order to guarantee that aerospace vehicle can fly safely and reliably in this complex environment, need carry out reliability test to components and parts wherein, it is long to test not only cost height, cycle under the real condition that flies, and potential safety hazard is arranged, and test results is difficult to analysis.So the multi-parameter compound environmental when being necessary to simulate real flying on the ground carries out low cost, the controlled accelerated test of environmental factor.

External minority developed country has just proposed the essentiality of multi-parameter compound environmental tester in nineteen fifties, up to the present researched and developed and relate to the isoparametric combinational environment of linear acceleration, vibration, temperature, noise and air pressure, but it is compound to relate to four parameters at most.Domestic composite test device is carried out starts from the 1980s, and present compound environmental tester only is confined to the compound environmental test of maximum linear acceleration-Re-vibration.In order more in depth to carry out the research of multi-parameter compound environmental, be necessary to develop the more compound environment test device of multi-parameter.

The utility model content

Can only simulate the single environment parameter for overcoming existing experimental engine, working environment that can't the comprehensive simulated device, the shortcoming that test effect is poor, precision is low, the utility model provides a kind of working environment of energy comprehensive simulated device, the multi-parameter compound environmental tester that test effect is good, precision is high.

Multi-parameter compound environmental tester is characterized in that: comprise the centrifuge of simulated line acceleration environment and be installed on the horn of centrifuge the environmental chamber in analog vibration acceleration environment, noise circumstance, temperature environment and gas-pressure ring border;

Described environmental chamber comprises the fully enclosed casing, a described casing and a case lid are tightly connected, described casing and case lid include and be made of metal, with guarantee the outer of gear housing rigidity and by non-metal make, keeping the heat-insulation layer of Compound Cavity internal temperature, the inner chamber of described casing forms the environment Compound Cavity independently with the external world;

Described Compound Cavity inside is provided with from top to bottom successively: be fixed in the temperature control device on the chamber wall of the noise generating mechanism on top of Compound Cavity and Compound Cavity, be positioned at Compound Cavity inside and with the vibration generating mechanism of the jigging platform moving coil in external world interlock, with the inside that is connected, gas is introduced described Compound Cavity with air pump with the air intake of formation field of pressure and the exhausr port that is tightly connected with vacuum generator;

Described vibration generating mechanism comprises the test platform that carries test specimen, be individually fixed in the two ends of described test platform and stretch out the platform push rod and the correction push rod of Compound Cavity, connect described test platform and described Compound Cavity inwall supporting spring and be fixed on the test platform, detect the sensor of vibration acceleration;

The chamber wall of described Compound Cavity is provided with the through hole that allows described push rod to run through, and is gapped between the surface of described push rod and the through-hole wall, forms step between the revealed section of described push rod and the section of including; Socket one ring seal film on the described revealed section, the inner ring of diaphragm seal and the revealed section of push rod is adaptive and be pressed in described step by the inner ring set collar, the outer ring of diaphragm seal is pressed in described environmental chamber outer wall by the outer ring set collar;

Described platform push rod is connected with described jigging platform moving coil, and described correction push rod and can stop the deviation correction mechanism of vibration generating mechanism and jigging platform moving coil over-deflection to be connected;

Peripheral being provided with stops moving-coil to take place circumferentially to reverse or the supporting mechanism of radial displacement on the aluminium frame of described jigging platform moving coil;

Described supporting mechanism comprises and frame leaf support affixed, that be hollow form, is installed on radially reed and axial reed on the leaf support, and connects radially reed and axially reed link span reed, that be the T type;

In socket of described aluminium frame and the described leaf support, gapped between the outer wall of the inwall of described leaf support and described aluminium frame;

The outside face of described leaf support is evenly distributed with fin, and the two ends of described axial reed are set up in respectively on the adjacent fin, and axially reed and described fin are affixed;

The montant portion of described reed link span is axially fixed at the middle part of described axial reed along moving-coil, and the cross bar portion of described reed link span and described radially reed are affixed;

The other end of described radially reed and described aluminium frame are affixed;

Left and right symmetrically is provided with two supporting mechanisms between the described adjacent fin;

The two ends of described test platform are equipped with supporting spring, and described environmental chamber inwall is fixed with platform support, and described supporting spring middle part is fixed on the otic placode of convex that described test platform, two ends be fixed in described platform support.

Further, described leaf support is regular prism shape, and the prismatic surface of described leaf support stretches out and forms described fin;

The outside face of described aluminium frame is provided with and described radially reed bonded assembly first boss, and described first boss is the regular prism adaptive with described leaf support; The right and left of described aluminium frame is respectively equipped with first boss.

Further, described centrifuge comprises support, be fixed in the drive motor on the described support, the horn of carrying complex parameter test device, with with the transmission of power of described drive motor transmission device to described horn, be fixed on the static balance mass on the horn and be installed on the described horn, realize the dynamically balanced dynamic balance execution mechanism of self adaptation;

Described horn is disc, is provided with web on the described horn equably, and described environmental chamber is installed on the described web;

Described transmission device comprise with the output shaft bonded assembly tape handler of described drive motor and with described horn bonded assembly gear mechanism; Described gear mechanism comprises and coaxial miniature gears of driven pulley and the big gear wheel affixed with described horn;

The underrun Bolt Connection of the upper surface of described big gear wheel and described horn, the lower surface of described big gear wheel is provided with and holds a circular groove that the thrust ball bearing of axial support can be provided for big gear wheel, described big gear wheel is connected with described support by described thrust ball bearing, and is gapped between the lower surface of described big gear wheel and the described support;

The center of described big gear wheel is provided with manhole, the bottom of described through hole extends internally and forms a circle and be used to install a step of angular contact ball bearing that can limit the radially degree of freedom of described big gear wheel, and that the top of described angular contact ball bearing is provided with is affixed with described support, to compress the cover plate of described angular contact ball bearing;

Described drive motor and transmission device are installed on described base inner;

The upper surface of described big gear wheel is provided with the location annular boss, and the bottom of described horn is provided with the annular groove adaptive with described boss.

Further, be fixed with on the described support with described horn and be connected, enter the seal cover cap in the transmission device, be connected for rotating labyrinth seal between described seal cover cap and the described horn to prevent dust;

The outer rim of described horn is fixed with the back up ring that the device that prevents to be installed on horn flies out, and is distributed with the floor that guarantees its rigidity on the inner periphery of described back up ring equably; Described floor and described horn are affixed.

Further, be provided with in the through hole of described big gear wheel to environmental chamber air feed and gas piping and can follow the rotation gas supply mechanism that horn rotates, described rotation gas supply mechanism comprises conducting slip ring that is hollow form and the swivel joint that is communicated with gas piping and air pump, and described swivel joint is positioned at described conducting slip ring inside;

The Ding Quan of described conducting slip ring and a mount pad are affixed, and described mount pad is fixed on the described support, the moving-coil of described conducting slip ring and the interlock of described big gear wheel; The moving-coil of described conducting slip ring and a rotary flange are affixed, and described rotary flange and described big gear wheel are affixed;

Described swivel joint decide circle and described mount pad is affixed, the moving-coil of described swivel joint is connected with described gas piping;

Described mount pad is positioned at described angular contact ball bearing, and cooperates with described angular contact ball bearing inner ring, and described cover plate and described mount pad are affixed.

Further, described dynamic balance execution mechanism comprises two dynamic balance execution unit that are fixed on the described horn and the implementation controller of controlling dynamic balance execution unit, and the adjusting direction of two dynamic balance execution unit is vertical; Described dynamic balance execution unit comprises the base that is fixed on the described horn, be fixed on the guide rail on the described base, with the slide block of described guide rail sliding block joint with promote described slide block along the reciprocating kinetic balance transmission device of described guide rail, on the affixed and described slide block of described kinetic balance mass;

Described kinetic balance transmission device comprises stepping motor and screw mechanism, and leading screw is connected with the output shaft of described stepping motor, and feed screw nut and described mass are affixed; The both sides of described leading screw are provided with the limit switch of restriction slide block moving range respectively, the two ends of described leading screw are connected with base by supporting base respectively, be provided with bearing between described supporting base and the described screw mandrel, described supporting base is fixed in described base; Described stepping motor is controlled by described implementation controller;

Described horn is provided with the harvester of the periodic vibration response of the horn that collection causes by amount of unbalance outward, the amplitude that described harvester and can obtain the vibratory response that different aequums causes and phase place and original unbalance and the moving direction of each slide block and the treater of miles of relative movement of calculating horn according to described amplitude and phase indicator are connected, and described treater is by wireless communication apparatus and described implementation controller communication.

Further, described harvester comprises the photoelectric encoder that is arranged in the miniature gears rotating shaft, the rotating speed of miniature gears can be converted to pulse sequence signal, with described photoelectric encoder bonded assembly data collecting card, with described data acquisition card connection and respond to the trigger mechanism whether horn vibrates and obtain the vibration sensor of vibration signal and trigger described data collecting card, make it begin to sample;

With the pulse sequence signal of described photoelectric encoder output external clock signal as data collecting card, with the vibration signal of described vibration sensor output incoming signal as data collecting card, the sampled signal that will obtain after will sampling to described vibration signal according to described external clock signal is as the output signal of described data collecting card, and described sampled signal is imported in the described treater; Described vibration sensor is an edd current transducer;

Described trigger mechanism comprise on the back up ring of being fixed in described horn magnet steel and with described data collecting card bonded assembly Hall switch; described horn is whenever goed around; described Hall switch and described magnet steel meet once, the described data collecting card of trigger action that described Hall switch and described magnet steel send when meeting.

Further, the impulse singla input one of described photoelectric encoder output detects in the frequency converter of horn rotating speed, is preset with the standard revolving speed of horn in the described frequency converter, and described drive motor is controlled by described frequency converter.

Further, described noise generating mechanism comprises the noise generation plate on the top that is fixed on described Compound Cavity, be fixed on the sound pollution source on the described noise generation plate and detect the audio sensor of the decibel value of noise in the Compound Cavity, and control described sound pollution source the generation decibel place the outer controller of casing; The output signal of described audio sensor inputs in the described controller;

Described temperature control device comprises the solid-state chip of the outer wall that is fixed on described Compound Cavity, the heat abstractor of being close to the outside face of described solid-state chip, be close to heat on the inwall of Compound Cavity and be passed to thermofin in the Compound Cavity, the temperature sensor of actual temperature in the compound cavity internal monitoring chamber the inside face of solid-state chip; Described temperature sensor is connected with described controller, and described solid-state chip is controlled by described controller;

Be provided with the baroceptor of its internal gas pressure of induction in the described Compound Cavity, described baroceptor is connected with described controller.

Further, described casing is spliced by epimere and hypomere, and the top of epimere heat-insulation layer extends internally and forms first bulge loop of the described noise generation of circle energy holding plate, and the top of hypomere heat-insulation layer extends internally and forms second bulge loop;

Be provided with between described first bulge loop and second bulge loop by heat conductor make, so that the internal layer of solid-state chip to be installed, described internal layer is set up in described second bulge loop, epimere heat-insulation layer and epimere skin are equipped with the opening that allows described heat abstractor to expose; Described internal layer and described epimere heat-insulation layer and hypomere heat-insulation layer are tightly connected, and are tightly connected between hypomere heat-insulation layer and the hypomere skin;

Be placed with cutoff board in the described Compound Cavity, the outer wall of described cutoff board is close to the inwall of described second bulge loop; Hypomere heat-insulation layer, second bulge loop and cutoff board are enclosed the buffering air flue that is communicated with air intake, exhausr port, and the bottom of described cutoff board is provided with and is communicated with described buffering air flue and Compound Cavity in-to-in air extractor vent;

Described cutoff board is provided with the 3rd bulge loop of convex, described the 3rd bulge loop is divided into the stirrer chamber of bottom and the sub-chamber of test on top with Compound Cavity, described stirrer chamber and test and be provided with the fan that air-flow is driven from bottom to top between the sub-chamber, described air extractor vent is positioned at the below of described the 3rd bulge loop, and described vibration generating mechanism is positioned on the 3rd bulge loop; Described vibration generating mechanism is arranged at the casing hypomere.

Further, described internal layer is provided with the backflow air flue that is communicated with sub-chamber of described test and cushion gas road, and described cutoff board is provided with described backflow air flue bonded assembly and is communicated with air flue, and described connection air flue is communicated with described buffering air flue; Described connection air flue is positioned on described the 3rd bulge loop; Described air intake, buffering air flue, air extractor vent, stirrer chamber, fan, the sub-chamber of test and backflow air flue and connection air flue, exhausr port constitute the gas channel of permission gas in the Compound Cavity inner loop.

Further, described heat abstractor comprises heat-pipe radiator, is fixed on the described inner layer outer wall, with the mount pad of the evaporator section of the described heat pipe of clamping be fixed in the adapter plate of described skin with the condensation segment of locating described heat pipe;

Described mount pad comprises the pedestal of the outside face of being close to described solid-state chip, with the clamping piece that holds out against described pedestal, heat-pipe radiator and described solid-state chip outside face are fully contacted; Described pedestal is formed the holding part that can clamp heat pipe by upper recess and lower concave part; Described holding part ovalize;

Two holding parts are arranged on each mount pad, and each holding part is fixed a heat pipe, the corresponding a slice solid-state chip of each mount pad.

Further, described epimere skin be provided with sealing aviation socket, to realize being electrically connected inside and outside the casing.Sealing aviation socket can transmit the acquired signal of sensors such as casing temperature inside, air pressure, vibration, noise to the casing controller outside; Meanwhile, controller send to the control signal of noise source also by the transmission of sealing aviation socket.

Further, described deviation correction mechanism comprises: the dividing plate affixed with described correction push rod, lay respectively at the fully enclosed hyperbaric chamber on both sides of described dividing plate and the hypobaric chamber that is communicated with atmosphere, be positioned at hyperbaric chamber and over against described dividing plate with the displacement pickup of the displacement of monitoring correction push rod and the bearing of described hyperbaric chamber of holding and hypobaric chamber; Described bearing is fixed on the web of horn, and the output signal of described displacement pickup inputs in the controller;

Described hyperbaric chamber is provided with air intake that is communicated with high-pressure pump by the inflation electromagnetic valve and the air extractor duct that is communicated with atmosphere by pressure-releasing electromagnetic valve, and described inflation electromagnetic valve and pressure-releasing electromagnetic valve are controlled by described controller;

Described hyperbaric chamber and hypobaric chamber are affixed, and the high pressure chest of hyperbaric chamber and the low-pressure cavity of hypobaric chamber are by described dividing plate mutual action; Described dividing plate and described hyperbaric chamber are tightly connected by second diaphragm seal.

The outer ring of described second diaphragm seal compresses by the outer ring set collar and is fixed on the hypobaric chamber, and the inner ring of described diaphragm seal compresses by the inner ring set collar and is fixed on the described dividing plate.

Further, the center of described hyperbaric chamber is provided with the tapped through hole that described displacement pickup is installed, and the inwall of described through hole extends to form a circle annulated column shape second boss to the dividing plate direction, and described displacement pickup and described second boss are tightly connected; Described displacement pickup and described second boss are connected and sealed by screw thread; Described correction push rod and described dividing plate are one-body molded.

Technical conceive of the present utility model is: use disc shaped horn, increased the capacity of horn, make centrifugal function that more, heavier test device is installed.Web is set on horn, to guarantee the rigidity of horn.

Directly driving horn by big gear wheel rotates, and pass through at the inner installed thrust ball-bearing casing of big gear wheel, make gear drive not only provide torque for horn, and limited the degree of freedom of big gear wheel at vertical direction, and provide the bearing force that makes progress for big gear wheel and horn, increase the load capacity of horn, make that more test device is installed becomes possibility.Stagger angle contact ball bearing in big gear wheel, and compress the inner ring of angular contact ball bearing by cover plate, limited the radially degree of freedom of big gear wheel and degree of freedom straight up, be completely fixed the position of big gear wheel, guarantee that the centre of gration of horn is fixed.The lower surface of big gear wheel is set to round table-like, bigger installing space to be provided in big gear wheel inside and to reduce the quality and the rotor inertia of big gear wheel.Offer through hole uniformly at the big gear wheel middle part, with quality and the rotor inertia that alleviates big gear wheel.

The utility model by casing airtight, insulation form one with external environment environment Compound Cavity independently mutually.A plurality of environmental factors such as NF, temperature factor, vibration factor and air pressure factor are compound in the same cavity working environment of energy comprehensive simulated device by noise generating mechanism, temperature control device, vibration generating mechanism and gas channel.

Gas in the air pump enters in the buffering air flue through air intake, again in air extractor vent enters the stirrer chamber, gas in the stirrer chamber is upwards driven to the sub-chamber of test by fan, gas is formed heat (or cold) air by solid-state chip heating (or refrigeration) in the sub-chamber of test, the gas in the sub-chamber of final trial converges to cushioning in the air flue through backflow air flue, connection upper airway flow.When the air pressure in the Compound Cavity reaches preset value, close air pump, then gas constantly circulates through gas channel.When need be with the gas removal in the Compound Cavity, only need to open vacuum generator, gas is in the exhausr port exhaust to atmosphere.To the environmental chamber air feed, vacuum generator then is fixed on the horn air pump by rotation gas joint.

The utility model not only forms field of pressure by gas channel is set, and heated by solid-state chip or refrigeration after air constantly in Compound Cavity, circulate, temperature in the Compound Cavity is slowly raise or descends, and the temperature of each point is even in the chamber, has a narrow range of temperature.

The utility model is by being provided with the buffering air flue, and with air intake and exhausr port and test sub-chamber isolation, the moment of having avoided dashing venting exerts an influence to the air pressure of testing in the sub-chamber, and the warranty test ambient pressure is stable, the test accuracy height.

Vibration generating mechanism of the present utility model is that the joggling table that case is outer links with the platform push rod, thus with transfer of vibration to test platform.Test platform is installed on the platform support by supporting spring.Use elastomeric material to come the manufacturing platform support, when push rod vibrates, platform support generation elastic deformation, and supporting spring plays the lever amplification, thus realize back and forth following of vibrating, and all the other degree of freedom of restriction test platform.

Adopt the diaphragm seal sealing between push rod and the hypomere skin, the production-release design of O RunddichtringO is pressed in the inner ring of diaphragm seal and outer ring, is the rubber diaphragm of indent between the inside and outside circle.During installation, the inner ring of diaphragm seal and outer ring compress with inner ring set collar and outer ring set collar respectively.This sealing means is being realized leak free simultaneously, and is therefore little to the motion effects of push rod because rubber diaphragm is an elastic component, guarantees transmission of vibration.

In the utility model by axial reed and radially reed constitute the supporting mechanism of jigging platform moving coil, make only double vibrations vertically of jigging platform moving coil, radial vibration then is subjected to the restriction of supporting mechanism, anti-stopper ring is along circumferentially rotating or reversing.

Supporting mechanism on two planes respectively four positions to the skew of moving-coil, lateral vibration such as reverse and retrain.When mounted, guaranteeing to strain the radially reed of each support unit under the coaxial prerequisite of moving-coil and air-gap field, relying on the torsional deflection of axial reed, radially the lever amplification of reed is realized following the moving-coil double vibrations.This supporting mechanism has the advantages that axial stiffness is little, radial rigidity is big, under the prerequisite of finishing the support of jigging platform moving coil, reduces the influence to movable parts axial vibration.

End at test platform is provided with deviation correction mechanism, by in the dividing plate both sides are provided with, pressing different hyperbaric chamber and hypobaric chamber, as correcting joggling table out-of-position correction power, make movable parts get back to initial rest position with the difference of pressure on dividing plate both sides, guarantee the joggling table normal operation.Correction power is by correction push rod, and platform, platform push rod are passed to jigging platform moving coil after tested, with balance vibration platform moving-coil and the suffered centnifugal force of correction force transmission member self.By the difference of pressure of control hyperbaric chamber and hypobaric chamber, can adjust the size of correction power.

Boss is set on hyperbaric chamber, not only can realizes being tightly connected of displacement pickup and hyperbaric chamber, and boss also can limit the maximum offset of jigging platform moving coil, to guarantee safety.

The actual shifts displacement of the correction push rod of sensing when displacement pickup is greater than default when allowing maximum displacement, controller makes that the inflation electromagnetic valve is opened, pressure-releasing electromagnetic valve closes, in hyperbaric chamber, charge into high pressure gas, improve correction power, in correction push rod advances to setting range.

The actual shifts displacement of the correction push rod of sensing when displacement pickup is less than default when allowing the least displacement amount, controller is opened inflation closed electromagnetic valve, pressure-releasing electromagnetic valve, portion gas is to reduce pressure reduction in the removal hyperbaric chamber, reduce correction power, until the correction push rod rollback to setting range.

The correction medium that the utility model uses is air, and air is not only with low cost, and density is little, and the action of centrifugal force of experiencing certainly is little, and control is simple, and is effective.

The utility model is by being provided with conducting slip ring and swivel joint, when having realized to the rotation power supply of centrifuge in-to-in environmental chamber and rotation air feed, air pump and and connection lead, connection pipe need not rotation, guarantee the centrifuge reliable operation.

In the impulse singla input converter with photoelectric encoder output,,, then make the faster rotational speed of drive motor as if actual speed overgauge rotating speed so that relatively with standard revolving speed default in actual speed and the frequency converter; If actual speed overgauge rotating speed then makes the rotating speed of drive motor slack-off.Like this, just can guarantee that the linear acceleration that centrifuge produces is in stabilized conditions all the time.

By dynamic balance execution mechanism is installed on horn, obtain the adjustment data of dynamic balance execution unit by the vibratory response that causes by amount of unbalance of analyzing horn, make horn reach kinetic balance.When the rotating speed of horn and mass distribution changed, the vibratory response of horn also changed accordingly, and treater will reanalyse, calculate vibratory response, re-move the slide block of dynamic balance execution mechanism, make horn reach kinetic balance again.

The utlity model has following advantage: 1, linear acceleration, vibration, temperature, noise, the pressure work environment of energy comprehensive simulated device, test effect is good, precision is high.

2, the centrifuge body takes up room for a short time, and the horn capacity is big, can carry environmental chamber and various attendant equipment, and can realize the self adaptation kinetic balance of horn.

3, the joggling table movement parts can effectively overcome action of centrifugal force, guarantees joggling table normal operation under the effect of centrifugal acceleration.

4, adopt sensor and actuation element distributed arrangement scheme, make and under Centrifugal Environment, to realize temperature, noise and gas-pressure ring border.

Description of drawings

Fig. 1 is a scheme drawing of the present utility model.

Fig. 2 is a cutaway view of the present utility model.

Fig. 3 is the front elevation of environmental chamber.

Fig. 3-the 1st, the A-A of Fig. 3 is to cutaway view.

Fig. 4 is the scheme drawing of epimere casing.

Fig. 4-the 1st, the birds-eye view of epimere casing.

Fig. 4-the 2nd, the B-B of Fig. 4-1 is to cutaway view.

Fig. 5 is the scheme drawing of hypomere casing.

Fig. 5-the 1st, the cutaway view of hypomere casing.

Fig. 6 is the scheme of installation of push rod and diaphragm seal.

Fig. 7 is the scheme drawing of epimere casing internal layer.

Fig. 8 is the outer field scheme drawing of epimere casing.

Fig. 9 is the scheme drawing of epimere cabinet insulation layer.

Figure 10 is the scheme drawing of diaphragm seal.

Figure 11-1 is the scheme drawing of seeing from the top down of the big gear wheel of centrifuge.

Figure 11-2 is the scheme drawing of seeing from bottom to top of the big gear wheel of centrifuge.

Figure 11-3 is the cutaway view of the big gear wheel of centrifuge.

Figure 12-1 is the scheme drawing of seeing from the top down of the horn of centrifuge.

Figure 12-2 is the scheme drawing of seeing from bottom to top of the horn of centrifuge.

Figure 12-3 is the cutaway view of the horn of centrifuge.

Figure 13 is the I portion enlarged drawing of Fig. 2.

Figure 14 is the cutaway view of dynamic balance execution unit.

Figure 15 is the control flow chart of dynamic balance execution mechanism.

Figure 16 is the scheme drawing that is connected with the test platform of jigging platform moving coil and deviation correction mechanism.

Figure 17 is the cutaway view that is connected with the test platform of jigging platform moving coil and deviation correction mechanism.

Figure 18 is the scheme drawing of jigging platform moving coil and test desk.

Figure 19 is radially reed and axially reed bonded assembly scheme drawing.

Figure 20 is the scheme drawing of leaf support.

Figure 21 is the scheme drawing of aluminium frame.

Figure 22 is leaf support and aluminium frame bonded assembly cutaway view.

Figure 23 is the scheme drawing of deviation correction mechanism.

The specific embodiment

Embodiment one

With reference to Fig. 1,2,3,16,18,19,20,21,22

Multi-parameter compound environmental tester, comprise the centrifuge 1 of simulation environment linear acceleration and be installed on the horn 11 of centrifuge 1, the environmental chamber 2 of the vibration acceleration in the simulation environment, environmental noise, ambient temperature and air pressure;

Described environmental chamber 2 comprises the fully enclosed casing, a described casing and a case lid 22 are tightly connected, described casing and case lid 22 include and be made of metal, with guarantee the outer of gear housing rigidity and by non-metal make, keeping the heat-insulation layer of Compound Cavity internal temperature, the inner chamber of described casing forms the environment Compound Cavity independently with the external world;

Described Compound Cavity inside is provided with from top to bottom successively: be fixed in the temperature control device on the chamber wall of the noise generating mechanism 23 on top of Compound Cavity and Compound Cavity, be positioned at Compound Cavity inside and with the vibration generating mechanism 24 of jigging platform moving coil 3 interlock in the external world, with the inside that is connected, gas is introduced described Compound Cavity with air pump with the air intake A of formation field of pressure and the exhausr port that is tightly connected with vacuum generator;

Described vibration generating mechanism 24 comprises the test platform 241 that carries test specimen, be individually fixed in the two ends of described test platform 241 and stretch out Compound Cavity platform push rod 242 and correction push rod 243, connect the supporting spring 244 of described test platform 241 and the inwall of described Compound Cavity and be fixed on test platform 241, detect the sensor of vibration acceleration;

The chamber wall of described Compound Cavity is provided with the through hole that allows described push rod 242,243 to run through, and is gapped between the surface of described push rod 242,243 and the through-hole wall, forms step between the revealed section 2411 of described push rod 241 and the section of including 2412; Socket one ring seal film 245 on the described revealed section 2411, the inner ring 2452 of diaphragm seal 245 is adaptive and be pressed in described step by inner ring set collar 262 with the revealed section of push rod, and the outer ring 2451 of diaphragm seal 245 is pressed in described environmental chamber outer wall by outer ring set collar 261;

Described platform push rod 242 is connected with described jigging platform moving coil 3, and described correction push rod 243 and can stop the deviation correction mechanism 4 of vibration generating mechanism and jigging platform moving coil over-deflection to be connected;

Peripheral being provided with stops moving-coil 3 to take place circumferentially to reverse or the supporting mechanism 32 of radial displacement on the aluminium frame 31 of described jigging platform moving coil 3.

Described supporting mechanism 32 comprises and frame leaf support 324 affixed, that be hollow form, be installed on radially reed 322 and axial reed 321 on the leaf support 324, and connect radially reed 322 and axially reed link span 323 reed 321, that be the T type;

In described aluminium frame 31 sockets and the described leaf support 324, gapped between the outer wall of the inwall of described leaf support 324 and described aluminium frame 31;

The outside face of described leaf support 324 is evenly distributed with fin 3241, and the two ends of described axial reed 321 are set up in respectively on the adjacent fin 3241, and axially reed 321 and described fin 3241 are affixed;

The montant portion 3231 of described reed link span 323 is axially fixed at the middle part of described axial reed 321 along moving-coil, and the cross bar portion 3232 of described reed link span 323 is affixed with described radially reed 322;

The other end of described radially reed 322 and described aluminium frame 31 are affixed;

Left and right symmetrically is provided with two supporting mechanisms 32 between the adjacent fin 3241;

The two ends of described test platform 241 are equipped with supporting spring 244, be fixed with platform support 246 on the described environmental cabinet inwall, described supporting spring 244 1 ends are fixed on the otic placode of convex that described test platform 241, the other end be fixed in described platform support 246.

Described leaf support 324 is regular prism shape, and the prismatic surface of described leaf support 324 stretches out and forms described fin 3241.

The outside face of described aluminium frame 31 is provided with and described radially reed 322 bonded assemblys first boss 311, and described first boss 311 is the regular prism adaptive with described leaf support 324; The right and left of described aluminium frame 311 is respectively equipped with first boss 311.

Described moving-coil aluminium frame 31 is provided with former and later two fins 311, each fin can about, about 4 supporting mechanisms 32 are installed, corresponding with fin on the leaf support respectively.Moving-coil 3 vibrates in the hole of leaf support under the support of 8 supporting constructions 32.

The technical conceive of present embodiment is: vibration generating mechanism 24 of the present utility model is that the joggling table that case is outer links with platform push rod 242, thus with transfer of vibration to test platform 241.

Adopt diaphragm seal 245 sealings between push rod and the hypomere skin, the production-release design of O RunddichtringO is pressed in the inner ring 2452 of diaphragm seal 245 and outer ring 2451, is the rubber diaphragm 2453 of indent between the inside and outside circle 2452,2451.During installation, the inner ring of diaphragm seal 245 and outer ring compress with inner ring set collar 262 and outer ring set collar 261 respectively.This sealing means is being realized leak free simultaneously, and is therefore little to the motion effects of push rod because rubber diaphragm 2453 is an elastic component, guarantees transmission of vibration.

In the utility model by axial reed 321 and radially reed 322 constitute the supporting mechanism of jigging platform moving coil 3, make only double vibrations vertically of jigging platform moving coil 3, radial vibration then is subjected to the restriction of supporting mechanism, anti-stopper ring 3 is along circumferentially rotating or reversing.

Supporting mechanism on two planes respectively four positions to the skew of moving-coil, lateral vibration such as reverse and retrain.When mounted, guaranteeing to strain the radially reed of each support unit under the coaxial prerequisite of moving-coil and air-gap field, relying on the torsional deflection of axial reed, radially the lever amplification of reed is realized following the moving-coil double vibrations.This supporting mechanism has the advantages that axial stiffness is little, radial rigidity is big, under the prerequisite of finishing the support of jigging platform moving coil, reduces the influence to movable parts axial vibration.

Test platform 241 is installed on the platform support 246 by supporting spring 244.Use elastomeric material to come manufacturing platform support 246, when push rod vibrated, elastic deformation took place in platform support 246, and supporting spring 244 plays the lever amplification, thereby realized back and forth following of vibrating, and all the other degree of freedom of restriction test platform 241.

Embodiment two

With reference to Figure 19

The difference part of present embodiment and embodiment one is: described deviation correction mechanism 4 comprises: the dividing plate 41 affixed with described correction push rod, lay respectively at the fully enclosed hyperbaric chamber 42 on both sides of described dividing plate 41 and the hypobaric chamber 43 that is communicated with atmosphere, be positioned at hyperbaric chamber 42 and over against described dividing plate 41 with the displacement pickup 44 of the displacement of monitoring correction push rod 243 and the bearing of described hyperbaric chamber 42 of holding and hypobaric chamber 43; Described bearing is fixed on the web 111 of horn 11, and the output signal of described displacement pickup 44 inputs in the controller;

Described hyperbaric chamber 42 is provided with air intake that is communicated with high-pressure pump by the inflation electromagnetic valve and the air extractor duct that is communicated with atmosphere by pressure-releasing electromagnetic valve, and described inflation electromagnetic valve and pressure-releasing electromagnetic valve are controlled by described controller;

Described hyperbaric chamber 42 and hypobaric chamber 43 are affixed, and the high pressure chest 421 of hyperbaric chamber 42 passes through described dividing plate 41 mutual actions with the low-pressure cavity of hypobaric chamber 43 431; Described dividing plate 41 is tightly connected by second diaphragm seal 45 with described hyperbaric chamber 42.

The outer ring of described second diaphragm seal 45 compresses by the outer ring set collar and is fixed on the hypobaric chamber, and the inner ring of described diaphragm seal compresses by the inner ring set collar and is fixed on the described dividing plate.

The center of described hyperbaric chamber 42 is provided with the tapped through hole that described displacement pickup 44 is installed, second boss that the inwall of described through hole extends to form a circle annulated column shape to the dividing plate direction, and described displacement pickup and described second boss are tightly connected; Described displacement pickup 44 is connected and sealed by screw thread with described second boss; Described correction push rod 243 and described dividing plate 41 are one-body molded.

The technical conceive of present embodiment is: the end at test platform is provided with deviation correction mechanism, by in the dividing plate both sides are provided with, pressing different hyperbaric chamber and hypobaric chamber, with the difference of pressure on dividing plate both sides as correcting joggling table out-of-position correction power, make movable parts get back to initial rest position, guarantee the joggling table normal operation.Correction power is by correction push rod, and platform, platform push rod are passed to jigging platform moving coil after tested, with balance vibration platform moving-coil and the suffered centnifugal force of correction force transmission member self.By the difference of pressure of control hyperbaric chamber and hypobaric chamber, can adjust the size of correction power.

Second boss is set on hyperbaric chamber, not only can realizes being tightly connected of displacement pickup and hyperbaric chamber, and second boss also can limit the maximum offset of jigging platform moving coil, to guarantee safety.

The actual shifts displacement of the correction push rod of sensing when displacement pickup is less than default when allowing the least displacement amount, controller is opened inflation closed electromagnetic valve, pressure-releasing electromagnetic valve, portion gas is to reduce pressure reduction in the removal hyperbaric chamber, reduce correction power, until the correction push rod rollback to setting range.

The actual shifts displacement of the correction push rod of sensing when displacement pickup is greater than default when allowing maximum displacement, controller makes that the inflation electromagnetic valve is opened, pressure-releasing electromagnetic valve closes, in hyperbaric chamber, charge into high pressure gas, improve correction power, in correction push rod advances to setting range.

The correction medium that the utility model uses is air, and air is not only with low cost, and density is little, and the action of centrifugal force of experiencing certainly is little, and control is simple, and is effective.

Embodiment three

With reference to Figure 11-1 ~ 15

The difference part of present embodiment and embodiment two is: described centrifuge 1 comprises support 12, be fixed in the drive motor 13 on the described support 12, the horn 11 of carrying complex parameter test device, with with the transmission of power of described drive motor 13 transmission device to described horn 11, be fixed on the static balance mass 14 on the horn and be installed on the described horn 11, realize the dynamically balanced dynamic balance execution mechanism of self adaptation;

Described horn 11 is disc, is provided with web 111 equably on the described horn 11, and described environmental chamber 2 is installed on the described web 111;

Described transmission device comprise with the output shaft bonded assembly tape handler 16 of described drive motor and with described horn 11 bonded assembly gear mechanisms 17; Described gear mechanism 17 comprises and coaxial miniature gears 171 of driven pulley and the big gear wheel 172 affixed with described horn 11;

The underrun Bolt Connection of the upper surface of described big gear wheel 172 and described horn 11, the lower surface of described big gear wheel 172 is provided with and holds a circular groove 1721 that the thrust ball bearing 6 of axial support can be provided for big gear wheel, described big gear wheel 172 is connected with described support 12 by described thrust ball bearing 6, and is gapped between the lower surface of described big gear wheel 172 and the described support;

The center of described big gear wheel 172 is provided with manhole 1722, the bottom of described through hole 1722 extends internally and forms a circle and be used to install a step 1723 of angular contact ball bearing 7 that can limit the radially degree of freedom of described big gear wheel, the top of described angular contact ball bearing 7 is provided with cover plate 71 12 affixed with described support, to compress described angular contact ball bearing 7;

Described drive motor 13 and transmission device are installed on described support 1 inside;

The upper surface of described big gear wheel 172 is provided with location annular boss 1724, and the bottom of described horn 11 is provided with the annular groove 113 adaptive with described boss 1724.

Be fixed with on the described support 12 with described horn 11 and be connected, enter the seal cover cap 18 in the transmission device, be connected for rotating labyrinth seal between described seal cover cap 18 and the described horn 11 to prevent dust;

The outer rim of described horn 11 is fixed with the back up ring 112 that the device that prevents to be installed on horn 11 flies out, and is distributed with the floor 1121 that guarantees its rigidity on the inner periphery of described back up ring 112 equably; Described floor 1121 and described horn 11 are affixed.

Be provided with in the through hole of described big gear wheel 172 to environmental chamber air feed and gas piping and can follow the rotation gas supply mechanism that described horn 11 rotates, described rotation gas supply mechanism comprises conducting slip ring 181 that is hollow form and the swivel joint 182 that is communicated with gas piping and air pump, and described swivel joint 182 is positioned at described conducting slip ring 181 inside;

The Ding Quan of described conducting slip ring 181 and a mount pad 183 are affixed, and described mount pad 183 is fixed in described support 12, the moving-coil of described conducting slip ring 181 and 172 interlocks of described big gear wheel; The moving-coil of described conducting slip ring 181 and a rotary flange 184 are affixed, and described rotary flange 184 and described big gear wheel 172 are affixed;

Described swivel joint 182 decide circle and described mount pad 183 is affixed, the moving-coil of described swivel joint 182 is connected with described gas piping;

Described mount pad 183 is positioned at described angular contact ball bearing 7, and described cover plate 71 and described mount pad 183 are affixed;

Described dynamic balance execution mechanism comprises that the adjusting direction of two dynamic balance execution unit 15 that are fixed on the described horn 11 and 19, two dynamic balance execution unit 15 of implementation controller of controlling dynamic balance execution unit is vertical; Described dynamic balance execution unit 15 comprises the base 151 that is fixed on the described horn 11, be fixed on the guide rail 152 on the described base 151, with the slide block 153 of described guide rail 152 sliding block joints with promote described slide block 153 along described guide rail 152 reciprocating kinetic balance transmission devices, on described kinetic balance the mass 154 affixed and described slide blocks 153; Described dynamic balance execution unit is controlled by described implementation controller 19;

Described kinetic balance transmission device comprises stepping motor 1551 and screw mechanism, and leading screw 1552 is connected with the output shaft of described stepping motor 1551, and feed screw nut 1553 and described mass 154 are affixed; The both sides of described leading screw 1552 are provided with the limit switch 1554 of restriction slide block moving range respectively, the two ends of described leading screw 1552 are connected with base 151 by supporting base 1555 respectively, be provided with bearing 1556 between described supporting base 1555 and the described screw mandrel 1552, described supporting base 1555 is fixed in described base 151;

Described horn 11 is outer to be provided with the harvester of the periodic vibration response of the horn 11 that collection causes by amount of unbalance, the amplitude that described harvester and can obtain the vibratory response that different aequums causes and phase place and original unbalance and the moving direction of each slide block and the treater 54 of miles of relative movement of calculating horn according to described amplitude and phase indicator are connected, and described treater 54 is by wireless communication apparatus 56 and 19 communications of described implementation controller.

Described harvester comprises the photoelectric encoder 51 that is arranged in miniature gears 171 rotating shafts, the rotating speed of miniature gears can be converted to pulse sequence signal, with described photoelectric encoder 51 bonded assembly data collecting cards 52, be connected with described data collecting card 52 and respond to the trigger mechanism whether horn 11 vibrates and obtain the vibration sensor 53 of vibration signal and trigger described data collecting card 52, make it begin to sample;

With the pulse sequence signal of described photoelectric encoder 51 outputs external clock signal as data collecting card 52, with the vibration signal of described vibration sensor 53 outputs incoming signal as data collecting card 52, the sampled signal that will obtain after will sampling to described vibration signal according to described external clock signal is as the output signal of described data collecting card 52, and described sampled signal is imported in the described treater 54; Described vibration sensor 53 is an edd current transducer;

Described trigger mechanism comprise on the back up ring of being fixed in described horn 11 magnet steel 114 and with described data collecting card 52 bonded assembly Hall switch 55; described horn 11 is whenever goed around; described Hall switch 55 meets once with described magnet steel 114, and the described data collecting card 52 of trigger action that described Hall switch 55 sends when meeting with described magnet steel 114 begins to sample.

The impulse singla input one of described photoelectric encoder 51 outputs detects in the frequency converter 57 of horn 11 rotating speeds, is preset with the standard revolving speed of horn 11 in the described frequency converter 57, and described drive motor 13 is controlled by described frequency converter 57.

The technical conceive of present embodiment is; Use disc shaped horn, increased the capacity of horn, make centrifugal function that more, heavier test device is installed.Web is set on horn, to guarantee the rigidity of horn.

Directly driving horn by big gear wheel rotates, and pass through at the inner installed thrust ball-bearing casing of big gear wheel, make gear drive not only provide torque for horn, and limited the degree of freedom of big gear wheel at vertical direction, and provide the bearing force that makes progress for big gear wheel and horn, increase the load capacity of horn, make that more test device is installed becomes possibility.Stagger angle contact ball bearing in big gear wheel, and compress the inner ring of angular contact ball bearing by cover plate, limited the radially degree of freedom of big gear wheel and degree of freedom straight up, be completely fixed the position of big gear wheel, guarantee that the centre of gration of horn is fixed.The lower surface of big gear wheel is set to round table-like, bigger installing space to be provided in big gear wheel inside and to reduce the quality and the rotor inertia of big gear wheel.Can also offer through hole uniformly in big gear wheel, with quality and the rotor inertia that alleviates big gear wheel.

The utility model is by being provided with conducting slip ring and swivel joint, when having realized to the rotation power supply of centrifuge in-to-in environmental chamber and rotation air feed, air pump and and connection lead, connection pipe need not rotation, guarantee the centrifuge reliable operation.

In the impulse singla input converter with photoelectric encoder output,,, then make the faster rotational speed of drive motor as if actual speed overgauge rotating speed so that relatively with standard revolving speed default in actual speed and the frequency converter; If actual speed overgauge rotating speed then makes the rotating speed of drive motor slack-off.Like this, just can guarantee that the linear acceleration that centrifuge produces is in stabilized conditions all the time.

By dynamic balance execution mechanism is installed on horn, obtain the adjustment data of dynamic balance execution unit by the vibratory response that causes by amount of unbalance of analyzing horn, make horn reach kinetic balance.When the rotating speed of horn and mass distribution changed, the vibratory response of horn also changed accordingly, and treater will reanalyse, calculate vibratory response, re-move the slide block of dynamic balance execution mechanism, make horn reach kinetic balance again.

The treatment step of the treater in the present embodiment is:

(1), photoelectric encoder converts the current rotating speed of miniature gears rotating shaft to pulse sequence signal, guarantees that horn whenever goes around, no matter horn rotating speed height, the pulse count in the pulse train is the same, the described pulse sequence signal of real time recording;

(2), with magnet steel as the mark on the horn, magnet steel and Hall switch send an impulse singla when meeting, the trigger data acquisition card is started working; Regulation is an initial point with the center of gyration of horn, and the line of magnet steel and initial point is Axle, the direction from described initial point to described mark is

To, and find according to right-hand rule The axle and

To;

(3), centrifuge before place in operation, need obtain the Mismachining tolerance curve of horn, and described Mismachining tolerance curve is preserved as systematic error; Horn is changeed under extremely low rotating speed

Change, make the size of the vibration that unbalancing value causes be almost 0, with the external clock signal of current pulse sequence signal as data collecting card, the impulse singla that sends with mark is as the energizing signal of data collecting card, described horn Mismachining tolerance curve is carried out integer-period sampled, the revolution that the sampling horn rotates is

, rotor is whenever goed around, and data collecting card is integer-period sampled

Individual, acquisition causes the Mismachining tolerance curve of horn

(

), write down described Mismachining tolerance curve;

(4), make centrifuge treating in normal working, obtain first vibration signal that the amount of unbalance of horn causes, with the external clock signal of current pulse sequence signal as data collecting card, the pulse of sending with mark is as the energizing signal of data collecting card, to described first vibration signal sampling, the same in the revolution that the sampling horn rotates and the sampling number of revolution and the step (3), be respectively

With

, obtain first vibration response curve

(

); Remove the Mismachining tolerance in first vibration response curve

( ),

Amplitude and the phase place utilizing automatic tracking correlation filtering inference elimination signal and obtain first vibration response curve are respectively:

(5), move respectively

,

The slide block of the dynamic balance execution unit axially, and write down the displacement that two axial top shoes move and be respectively

,

If wherein displacement moves to positive dirction for just representing, for negative indication moves to negative direction;

Obtain second vibration signal that the current amount of unbalance of horn causes, with the external clock signal of current pulse sequence signal as data collecting card, described second vibration signal is sampled as the energizing signal of data collecting card with the pulse that mark sends, the same in the revolution that the sampling horn rotates and the sampling number of revolution and the step (3), be respectively

With

, obtain second vibration response curve

( ); Remove the Mismachining tolerance in second vibration response curve

(

), amplitude and the phase place utilizing automatic tracking correlation filtering inference elimination signal and obtain second vibration response curve are respectively:

(6), the amplitude and the phase place of first, second vibration response curve of drawing according to step (4) and step (5), and the moving direction of each slide block and displacement, use influence coefficient method to calculate the original unbalance of horn:

According to described original unbalance, and get its being projected as on two slide block moving directions respectively

,

, promptly

, being derived as direction and distance that the slide block that makes centrifuge reach kinetic balance, each dynamic balance execution mechanism need move, computing formula is as follows:

，

Wherein

For just represent to Direction moves, for negative indication to

Direction moves, For just represent to

Direction moves, for negative indication to Direction moves; x, yBe two displacements that slide block moves in the step (6); mBe the movable part quality, movable part comprises slide block, feed screw nut, kinetic balance mass and connects the bolt and nut of usefulness;

(7), make the slide block of each dynamic balance execution mechanism move to the position of requirement; Obtain the current vibratory response of centrifuge, judge whether current vibration is in the vibration allowed band, if, the position that then keeps each slide block; If not, then return step (4).

In the step (7), before moving slider, judge whether slide block can be moved to outside the guide rail earlier: if then send warning, and prompting can't be finished kinetic balance; If not, moving slider then.

Embodiment four

With reference to Fig. 3-10

The difference part of present embodiment and embodiment three is: described noise generating mechanism 23 comprises the noise generation plate on the top that is fixed on described Compound Cavity, be fixed on the sound pollution source on the described noise generation plate and detect the audio sensor of the decibel value of noise in the Compound Cavity, and control described sound pollution source the generation decibel place the outer controller of casing; The output signal of described audio sensor inputs in the described controller;

Described temperature control device 25 comprises the solid-state chip of the outer wall that is fixed on described Compound Cavity, the heat abstractor of being close to the outside face of described solid-state chip, be close to Compound Cavity inwall, the temperature of solid-state chip is passed to the thermofin 251 in the Compound Cavity and the temperature sensor of the actual temperature in the monitoring Compound Cavity; Described temperature sensor is connected with described controller, and described solid-state chip is controlled by described controller;

Be provided with the baroceptor of its internal gas pressure of induction in the described Compound Cavity, described baroceptor is connected with described controller.

Described casing is spliced by epimere 211 and hypomere 212, and the top of epimere heat-insulation layer 2112 extends internally and forms first bulge loop 21121 of the described noise generation of circle energy holding plate, and the top of hypomere heat-insulation layer extends internally and forms second bulge loop 21221;

Be provided with between described first bulge loop 21121 and second bulge loop 21221 by heat conductor make, so that the internal layer 213 of solid-state chip to be installed, described internal layer 213 is set up in described second bulge loop 21221, and epimere heat-insulation layer 2112 and epimere skin 2111 are equipped with the opening that allows described heat abstractor to expose; Described internal layer 213 is tightly connected with described epimere heat-insulation layer 2112 and hypomere heat-insulation layer 2122, is tightly connected between hypomere heat-insulation layer 2122 and the hypomere skin 2121;

Be placed with cutoff board 26 in the described Compound Cavity, the outer wall of described cutoff board 26 is close to the inwall of described second bulge loop 21221; Hypomere heat-insulation layer 2122, second bulge loop 21221 and cutoff board 26 are enclosed the buffering air flue B that is communicated with air intake A, exhausr port, and the bottom of described cutoff board 26 is provided with and is communicated with described buffering air flue B and Compound Cavity in-to-in air extractor vent C;

Described cutoff board 26 is provided with the 3rd bulge loop 261 of convex, described the 3rd bulge loop 261 is divided into the stirrer chamber E of bottom and the sub-chamber F of test on top with Compound Cavity, described stirrer chamber E and test between the sub-chamber F and be provided with the fan that air-flow is driven from bottom to top, described air extractor vent C is positioned at the below of described the 3rd bulge loop 261, and described vibration generating mechanism 24 is positioned on the 3rd bulge loop 261; Described vibration generating mechanism 24 is arranged at the casing hypomere.

Described internal layer 213 is provided with the backflow air flue G that is communicated with sub-chamber F of described test and cushion gas road B, and described cutoff board 26 is provided with described backflow air flue G bonded assembly and is communicated with air flue D, and described connection air flue D is communicated with described buffering air flue B; Described connection air flue D is positioned on described the 3rd bulge loop 261; Described air intake A, buffering air flue B, air extractor vent C, stirrer chamber E, fan, the sub-chamber F of test and backflow air flue G and connection air flue D, exhausr port constitute the gas channel of permission gas in the Compound Cavity inner loop.

Described heat abstractor comprises heat-pipe radiator, is fixed on described internal layer 213 outer walls, with the mount pad 252 of the evaporator section of the described heat pipe of clamping be fixed in the adapter plate 253 of described skin with the condensation segment of locating described heat pipe;

Described mount pad 252 comprises the pedestal 2521 of the outside face of being close to described solid-state chip, with the clamping piece 2522 that holds out against described pedestal 2521, heat-pipe radiator and described solid-state chip outside face are fully contacted; The male part of the inner fovea part of described pedestal 2521 and clamping piece 2522 is enclosed the holding part 2523 that can clamp heat pipe; Described holding part 2523 ovalizes;

Two holding parts 2523 are arranged on each mount pad 252, and each holding part 2523 is fixed a heat pipe, the corresponding a slice solid-state chip of each mount pad.

Described epimere skin 2111 is provided with sealing aviation socket, to realize being electrically connected inside and outside the casing.Sealing aviation socket can transmit the acquired signal of sensors such as casing temperature inside, air pressure, vibration, noise to the casing controller outside; Meanwhile, the control signal that sends of controller to noise source.

The technical conceive of present embodiment is: the utility model by casing airtight, insulation form one with external environment environment Compound Cavity independently mutually.A plurality of environmental factors such as NF, temperature factor, vibration factor and air pressure factor are compound in the same cavity working environment of energy comprehensive simulated device by noise generating mechanism, temperature control device, vibration generating mechanism and gas channel.

Gas in the air pump enters in the buffering air flue through air intake, again in air extractor vent enters the stirrer chamber, gas in the stirrer chamber is upwards driven to the sub-chamber of test by fan, gas is formed heat (or cold) air by solid-state chip heating (or refrigeration) in the sub-chamber of test, the gas in the sub-chamber of final trial converges to cushioning in the air flue through backflow air flue, connection upper airway flow.When the air pressure in the Compound Cavity reaches preset value, close air pump, then gas constantly circulates through gas channel.When need be with the gas removal in the Compound Cavity, only need to open vacuum generator, gas is in the exhausr port exhaust to atmosphere.To the environmental chamber air feed, vacuum generator then is fixed on the horn air pump by rotation gas joint.

The utility model not only forms field of pressure by gas channel is set, and heated by solid-state chip or refrigeration after air constantly in Compound Cavity, circulate, temperature in the Compound Cavity is slowly raise or descends, and the temperature of each point is even in the chamber, has a narrow range of temperature.

The utility model is by being provided with the buffering air flue, and with air intake and exhausr port and test sub-chamber isolation, the moment of having avoided dashing venting exerts an influence to the air pressure of testing in the sub-chamber, and the warranty test ambient pressure is stable, the test accuracy height.

The described content of this specification sheets embodiment only is enumerating the way of realization of utility model design; protection domain of the present utility model should not be regarded as only limiting to the concrete form that embodiment states, protection domain of the present utility model also reach in those skilled in the art according to the utility model design the equivalent technologies means that can expect.

Claims (10)

1. multi-parameter compound environmental tester is characterized in that: comprise the centrifuge of simulated line acceleration environment and be installed on the horn of centrifuge, the environmental chamber in analog vibration acceleration environment, noise circumstance, temperature environment and gas-pressure ring border;

Described environmental chamber comprises the fully enclosed casing, a described casing and a case lid are tightly connected, described casing and case lid include and be made of metal, with guarantee the outer of gear housing rigidity and by non-metal make, keeping the heat-insulation layer of Compound Cavity internal temperature, the inner chamber of described casing forms the environment Compound Cavity independently with the external world;

Described Compound Cavity inside is provided with from top to bottom successively: be fixed in the temperature control device on the chamber wall of the noise generating mechanism on top of Compound Cavity and Compound Cavity, be positioned at Compound Cavity inside and with the vibration generating mechanism of the jigging platform moving coil in external world interlock, with the inside that is connected, gas is introduced described Compound Cavity with air pump with the air intake of formation field of pressure and the exhausr port that is tightly connected with vacuum generator;

Described vibration generating mechanism comprises the test platform that carries test specimen, be individually fixed in the two ends of described test platform and stretch out the platform push rod and the correction push rod of Compound Cavity, connect described test platform and described Compound Cavity inwall supporting spring and be fixed on the test platform, detect the sensor of vibration acceleration;

The chamber wall of described Compound Cavity is provided with the through hole that allows described push rod to run through, and is gapped between the surface of described push rod and the through-hole wall, forms step between the revealed section of described push rod and the section of including; Socket one ring seal film on the described revealed section, the inner ring of diaphragm seal and the revealed section of push rod is adaptive and be pressed in described step by the inner ring set collar, the outer ring of diaphragm seal is pressed in described environmental chamber outer wall by the outer ring set collar;

Described platform push rod is connected with described jigging platform moving coil, and described correction push rod and can stop the deviation correction mechanism of vibration generating mechanism and jigging platform moving coil over-deflection to be connected;

Peripheral being provided with stops moving-coil to take place circumferentially to reverse or the supporting mechanism of radial displacement on the aluminium frame of described jigging platform moving coil;

Described supporting mechanism comprises and frame leaf support affixed, that be hollow form, is installed on radially reed and axial reed on the leaf support, and connects radially reed and axially reed link span reed, that be the T type;

In socket of described aluminium frame and the described leaf support, gapped between the outer wall of the inwall of described leaf support and described aluminium frame;

The outside face of described leaf support is evenly distributed with fin, and the two ends of described axial reed are set up in respectively on the adjacent fin, and axially reed and described fin are affixed;

The montant portion of described reed link span is axially fixed at the middle part of described axial reed along moving-coil, and the cross bar portion of described reed link span and described radially reed are affixed;

The other end of described radially reed and described aluminium frame are affixed;

Left and right symmetrically is provided with two supporting mechanisms between the adjacent fin;

The two ends of described test platform are equipped with supporting spring, and described environmental chamber inwall is fixed with platform support, and described supporting spring middle part is fixed on the otic placode of convex that described test platform, two ends be fixed in described platform support.

2. multi-parameter compound environmental tester as claimed in claim 1 is characterized in that: described leaf support is regular prism shape, and the prismatic surface of described leaf support stretches out and forms described fin;

The outside face of described aluminium frame is provided with and described radially reed bonded assembly first boss, and described first boss is the regular prism adaptive with described leaf support; The right and left of described aluminium frame is respectively equipped with first boss.

3. multi-parameter compound environmental tester as claimed in claim 2, it is characterized in that: described centrifuge comprises support, be fixed in the drive motor on the described support, the horn of carrying complex parameter test device, with with the transmission of power of described drive motor transmission device to described horn, be fixed on the static balance mass on the horn and be installed on the described horn, realize the dynamically balanced dynamic balance execution mechanism of self adaptation;

Described horn is disc, is provided with web on the described horn equably, and described environmental chamber is installed on the described web;

Described transmission device comprise with the output shaft bonded assembly tape handler of described drive motor and with described horn bonded assembly gear mechanism; Described gear mechanism comprises and coaxial miniature gears of driven pulley and the big gear wheel affixed with described horn;

The underrun Bolt Connection of the upper surface of described big gear wheel and described horn, the lower surface of described big gear wheel is provided with and holds a circular groove that the thrust ball bearing of axial support can be provided for big gear wheel, described big gear wheel is connected with described support by described thrust ball bearing, and is gapped between the lower surface of described big gear wheel and the described support;

The center of described big gear wheel is provided with manhole, the bottom of described through hole extends internally and forms a circle and be used to install a step of angular contact ball bearing that can limit the radially degree of freedom of described big gear wheel, and that the top of described angular contact ball bearing is provided with is affixed with described support, to compress the cover plate of described angular contact ball bearing;

Described drive motor and transmission device are installed on described base inner;

The upper surface of described big gear wheel is provided with the location annular boss, and the bottom of described horn is provided with the annular groove adaptive with described boss.

4. multi-parameter compound environmental tester as claimed in claim 3, it is characterized in that: be provided with in the through hole of described big gear wheel to environmental chamber air feed and gas piping and can follow the rotation gas supply mechanism that horn rotates, described rotation gas supply mechanism comprises conducting slip ring that is hollow form and the swivel joint that is communicated with gas piping and air pump, and described swivel joint is positioned at described conducting slip ring inside;

The Ding Quan of described conducting slip ring and a mount pad are affixed, and described mount pad is fixed on the described support, the moving-coil of described conducting slip ring and the interlock of described big gear wheel; The moving-coil of described conducting slip ring and a rotary flange are affixed, and described rotary flange and described big gear wheel are affixed;

Described swivel joint decide circle and described mount pad is affixed, the moving-coil of described swivel joint is connected with described gas piping;

Described mount pad is positioned at described angular contact ball bearing, and cooperates with described angular contact ball bearing inner ring, and described cover plate and described mount pad are affixed.

5. multi-parameter compound environmental tester as claimed in claim 4, it is characterized in that: described dynamic balance execution mechanism comprises two dynamic balance execution unit that are fixed on the described horn and the implementation controller of controlling dynamic balance execution unit, and the adjusting direction of two dynamic balance execution unit is vertical; Described dynamic balance execution unit comprises the base that is fixed on the described horn, be fixed on the guide rail on the described base, with the slide block of described guide rail sliding block joint with promote described slide block along the reciprocating kinetic balance transmission device of described guide rail, on the affixed and described slide block of described kinetic balance mass;

Described kinetic balance transmission device comprises stepping motor and screw mechanism, and leading screw is connected with the output shaft of described stepping motor, and feed screw nut and described mass are affixed; The both sides of described leading screw are provided with the limit switch of restriction slide block moving range respectively, the two ends of described leading screw are connected with base by supporting base respectively, be provided with bearing between described supporting base and the described screw mandrel, described supporting base is fixed in described base; Described stepping motor is controlled by described implementation controller;

Described horn is provided with the harvester of the periodic vibration response of the horn that collection causes by amount of unbalance outward, the amplitude that described harvester and can obtain the vibratory response that different aequums causes and phase place and original unbalance and the moving direction of each slide block and the treater of miles of relative movement of calculating horn according to described amplitude and phase indicator are connected, and described treater is by wireless communication apparatus and described implementation controller communication.

6. multi-parameter compound environmental tester as claimed in claim 5, it is characterized in that: described harvester comprises the photoelectric encoder that is arranged in the miniature gears rotating shaft, the rotating speed of miniature gears can be converted to pulse sequence signal, with described photoelectric encoder bonded assembly data collecting card, with described data acquisition card connection and respond to the trigger mechanism whether horn vibrates and obtain the vibration sensor of vibration signal and trigger described data collecting card, make it begin to sample;

With the pulse sequence signal of described photoelectric encoder output external clock signal as data collecting card, with the vibration signal of described vibration sensor output incoming signal as data collecting card, the sampled signal that will obtain after will sampling to described vibration signal according to described external clock signal is as the output signal of described data collecting card, and described sampled signal is imported in the described treater; Described vibration sensor is an edd current transducer;

Described trigger mechanism comprise on the back up ring of being fixed in described horn magnet steel and with described data collecting card bonded assembly Hall switch; described horn is whenever goed around; described Hall switch and described magnet steel meet once, the described data collecting card of trigger action that described Hall switch and described magnet steel send when meeting.

7. as the described multi-parameter compound environmental tester of one of claim 1-6, it is characterized in that: described noise generating mechanism comprises the noise generation plate on the top that is fixed on described Compound Cavity, be fixed on the sound pollution source on the described noise generation plate and detect the audio sensor of the decibel value of noise in the Compound Cavity, and control described sound pollution source the generation decibel place the outer controller of casing; The output signal of described audio sensor inputs in the described controller;

Described temperature control device comprises the solid-state chip of the outer wall that is fixed on described Compound Cavity, the heat abstractor of being close to the outside face of described solid-state chip, be close to heat on the inwall of Compound Cavity and be passed to thermofin in the Compound Cavity, the temperature sensor of actual temperature in the compound cavity internal monitoring chamber the solid-state chip inside face; Described temperature sensor is connected with described controller, and described solid-state chip is controlled by described controller;

Be provided with the baroceptor of its internal gas pressure of induction in the described Compound Cavity, described baroceptor is connected with described controller.

8. multi-parameter compound environmental tester as claimed in claim 7, it is characterized in that: described casing is spliced by epimere and hypomere, the top of epimere heat-insulation layer extends internally and forms first bulge loop of the described noise generation of circle energy holding plate, and the top of hypomere heat-insulation layer extends internally and forms second bulge loop;

Be provided with between described first bulge loop and second bulge loop by heat conductor make, so that the internal layer of solid-state chip to be installed, described internal layer is set up in described second bulge loop, epimere heat-insulation layer and epimere skin are equipped with the opening that allows described heat abstractor to expose; Described internal layer and described epimere heat-insulation layer and hypomere heat-insulation layer are tightly connected, and are tightly connected between hypomere heat-insulation layer and the hypomere skin;

Be placed with cutoff board in the described Compound Cavity, the outer wall of described cutoff board is close to the inwall of described second bulge loop; Hypomere heat-insulation layer, second bulge loop and cutoff board are enclosed the buffering air flue that is communicated with air intake, exhausr port, and the bottom of described cutoff board is provided with and is communicated with described buffering air flue and Compound Cavity in-to-in air extractor vent;

Described cutoff board is provided with the 3rd bulge loop of convex, described the 3rd bulge loop is divided into the stirrer chamber of bottom and the sub-chamber of test on top with Compound Cavity, described stirrer chamber and test and be provided with the fan that air-flow is driven from bottom to top between the sub-chamber, described air extractor vent is positioned at the below of described the 3rd bulge loop, and described vibration generating mechanism is positioned on the 3rd bulge loop; Described vibration generating mechanism is arranged at the casing hypomere;

Described internal layer is provided with the backflow air flue that is communicated with sub-chamber of described test and cushion gas road, and described cutoff board is provided with described backflow air flue bonded assembly and is communicated with air flue, and described connection air flue is communicated with described buffering air flue; Described connection air flue is positioned on described the 3rd bulge loop; Described air intake, buffering air flue, air extractor vent, stirrer chamber, fan, the sub-chamber of test and backflow air flue and connection air flue, exhausr port constitute the gas channel of permission gas in the Compound Cavity inner loop.

9. multi-parameter compound environmental tester as claimed in claim 1, it is characterized in that described deviation correction mechanism comprises: the dividing plate affixed with described correction push rod, lay respectively at the fully enclosed hyperbaric chamber on both sides of described dividing plate and the hypobaric chamber that is communicated with atmosphere, be positioned at hyperbaric chamber and over against described dividing plate with the displacement pickup of the displacement of monitoring correction push rod and the bearing of described hyperbaric chamber of holding and hypobaric chamber; Described bearing is fixed on the web of horn, and the output signal of described displacement pickup inputs in the controller;

Described hyperbaric chamber is provided with air intake that is communicated with high-pressure pump by the inflation electromagnetic valve and the air extractor duct that is communicated with atmosphere by pressure-releasing electromagnetic valve, and described inflation electromagnetic valve and pressure-releasing electromagnetic valve are controlled by described controller;

Described hyperbaric chamber and hypobaric chamber are affixed, and the high pressure chest of hyperbaric chamber and the low-pressure cavity of hypobaric chamber are by described dividing plate mutual action; Described dividing plate and described hyperbaric chamber are tightly connected by second diaphragm seal.

The outer ring of described second diaphragm seal compresses by the outer ring set collar and is fixed on the hypobaric chamber, and the inner ring of described diaphragm seal compresses by the inner ring set collar and is fixed on the described dividing plate.

10. multi-parameter compound environmental tester as claimed in claim 9, it is characterized in that: the center of described hyperbaric chamber is provided with the tapped through hole that described displacement pickup is installed, the inwall of described through hole extends to form a circle annulated column shape second boss to the dividing plate direction, and described displacement pickup and described second boss are tightly connected; Described displacement pickup and described second boss are connected and sealed by screw thread; Described correction push rod and described dividing plate are one-body molded.

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