A kind of hot rotatory test temperature measuring equipment of engine rotor part and temp measuring methodTechnical field
The invention belongs to Aero Engine Testing fields, and in particular to a kind of hot rotation test survey of engine rotor partWarm device and temp measuring method.
Background technique
Rotor (or wheel disc) is one of main parts size of gas-turbine unit, is commonly determined as the key of engineComponents often work under high temperature, high-speed state, and environment is harsh, and stress level is higher, usually surpass to rotorTurn, the method for overtemperature and burst test examines its static strength, examine engine rotor structural intergrity, low follow carried out to rotorIts predetermined safe life is verified in ring fatigue test, and guaranteeing that rotor safely and reliably works for engine is all to Guan ChongIt wants.With a large amount of new material and New technical use, the operating temperature that rotor is born is higher and higher, engine rotor part heatState rotation test not only wants the stress of simulation test piece, also to carry out temperature field simulation.Engine rotor is along disk diameters at different levelsIt is all different to the temperature with rotor axial, there is temperature gradient.The simulation in temperature field, examination are carried out in the limited space of exerciserTesting part again is tested in the environment of high temperature, high speed, and the accurate measurement of temperature is the hot rotation test of disk-like accessoryA great problem, domestic major laboratory all strive to find, attempts it is new, be more convenient, accurate thermometry.
Summary of the invention
The purpose of the present invention is to provide a kind of hot rotatory test temperature measuring equipment of engine rotor part and temp measuring method,With overcome the deficiencies in the prior art.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
A kind of hot rotatory test temperature measuring equipment of engine rotor part, including experimental box body, upper end is set in experimental box bodyThere is the rotating shaft device for installing test specimen to be measured, experimental box body inner wall is equipped with insulating layer, and experimental box body bottom is equipped with heatingDevice assembly, experimental box body inner sidewall are fixed near point thermocouple and flexible thermocouple, and flexible thermocouple is fixed by telescopic deviceIn in experimental box body, near point thermocouple is fixedly installed in right above test specimen to be measured position to be measured；Heater assembly is located at test and testsImmediately below part position rotating path to be measured.
Further, it surveys testpieces position rotating path to be measured and is arranged right below multiple heater assemblies, heater assemblyHaving heaters power cabinet is connected by multi way temperature adjuster.
Further, heater assembly uses resistance heater, including bar magnet and the resistance wire for being wrapped in bar magnet, bar magnetOne end is equipped with power connection, and the bar magnet other end is equipped with anchor tip, and bar magnet of the anchor tip for that will have resistance wire is integrally solidDingan County is in experimental box body.
Further, the thermocouple that stretches can be contacted by telescopic device with test specimen to be measured surface of position to be measured.
Further, telescopic device using Telescopic-cylinder structure or uses crank connecting link telescoping mechanism, experimental box body side wallEquipped with through-hole, the telescopic arm of telescopic device passes through experimental box body lateral through aperture and is placed in experimental box body, and flexible thermocouple is fixed onOn the telescopic arm of telescopic device.
Further, near point thermocouple is connected with thermograph display by conducting wire, and flexible thermocouple is connected with temperatureRecorder.
Further, near point thermocouple is not more than 20mm right above test specimen to be measured position to be measured.
A kind of hot rotation test temp measuring method of engine rotor part, comprising the following steps:
Test specimen to be measured is fixed on the rotating shaft device in temperature measuring equipment by step 1)；
Step 2) will be treated test block under 10%~20% revolving speed of the rotating shaft device under maximum test speed and be addedHeat, heating maximum temperature are no more than test requirements document temperature field temperature；
Step 3) treats test block detected part progress thermometric record using near point thermocouple, when near point thermocouple measuresWhen test specimen survey spot temperature to be measured reaches test requirements document temperature field temperature 80%, it is simultaneously stopped test specimen rotation to be measured and to heaterComponent heating, after test specimen revolving speed to be measured drops to zero, treats test block detected part surface contact thermography using flexible thermocoupleAnd record flexible electric thermo-couple temperature change curve；
Test specimen detected part to be measured stops the actual temperature T at heating momentIt is realAre as follows:
TIt is real=tA+△t
In formula: tA--- the temperature that flexible thermocouple is contacted with test specimen detected part to be measured；△ t --- temperature corrected value；
△ t=a* △ s, △ s is that heater assembly stops the heating moment to flexible thermocouple and test specimen detected part to be measuredTime of contact interval, a are test specimen detected part rate of temperature fall to be measured:
A=(tA-tA-t)/t；
T is the interval moment after flexible thermocouple is contacted with test specimen detected part to be measured, tA-tFor flexible thermocouple with it is to be measuredThe temperature value of moment t moment is spaced after the contact of test specimen detected part；
6 temperature of near point thermocouple is T when step 4), stopping test specimen to be measured are rotated and heated to heater assemblyStop, near point heatGalvanic couple temperature-compensating △ tr=TIt is real-TStop；It therefore can be in the hope of 6 measured temperature T of near point thermocoupleStop=TIt is real-△tr, according to temperatureCompensate △ tr, actual temperature T when test specimen to be measured stops operating when acquiring Pass Test temperatureIt is realThe default near point heat for needing to meetGalvanic couple temperature TStop, that is, complete the hot rotation test thermometric of test specimen to be measured.
Further, test specimen to be measured is installed on the intracorporal rotating shaft device of experimental box, bottom is set in experimental box bodyHeater assembly is set, heater assembly, which is located at, to be surveyed immediately below testpieces position rotating path to be measured, and near point thermocouple is fixed onIt surveys right above testpieces position to be measured no more than at 20mm.
Further, test specimen detected part to be measured surface actual temperature is measured according to step 3), when test specimen measurement to be measured is repairedAfter actual temperature after just reaches the temperature field of test requirements document, the temperature of near point thermocouple 6 when stopping heating according to heating componentTemperature field is maintained, is kept the temperature according to the size of testpieces and structure, 4 heat penetration of test specimen to be measured, guarantee test part temperature field symbol are madeTest temperature requirement is closed, the hot rotation test thermometric of engine rotor part can be completed, treat test block and start formally to carry outHot test.
Compared with prior art, the invention has the following beneficial technical effects:
A kind of hot rotatory test temperature measuring equipment of engine rotor part of the present invention, by experimental box body upper end be equipped withFor installing the rotating shaft device of test specimen to be measured, experimental box body inner wall is equipped with insulating layer, and having heaters is installed in experimental box body bottomComponent, experimental box body inner sidewall are fixed near point thermocouple and flexible thermocouple, and flexible thermocouple is fixed on by telescopic deviceIn experimental box body, near point thermocouple is fixedly installed in right above test specimen to be measured position to be measured；Heater assembly, which is located at, surveys testpiecesImmediately below position rotating path to be measured, while test block is treated using near point thermocouple and flexible thermocouple and carries out thermometric, it canTemperature change at real-time monitoring near point thermocouple, while part surface temperature to be tested can be obtained, to guarantee accurate measurement examinationPart temperature is tested, present apparatus structure is simple, it is ensured that the reliable realization of test result engine rotor part rotates hot testThe measurement in temperature field.
A kind of hot rotation test temp measuring method of engine rotor part of the present invention treats test block and carries out gradually heating prisonIt surveys, when test specimen detected part temperature to be measured reaches test requirements document temperature field temperature 80%, stops test specimen rotation to be measured, close and addHot device assembly after test specimen revolving speed to be measured ensures to drop to zero, is treated the contact of test block detected part surface using flexible thermocouple and is surveyedTemperature simultaneously records test specimen detected part rotor actual temperature to be measured, while being recorded using near point thermocouple close at corresponding detected partPoint thermocouple measuring temperature value recording curve, repairs recording curve according to the rotor actual temperature under the conditions of rotary heatingJust, actual temperature of rotor under the conditions of rotary heating is obtained, by revised temperature value and corresponding near point thermocouple measurementTemperature value is compared, and obtains the relationship between near point electric thermo-couple temperature measured value and actual tests part temperature, solve due toThe problem of measurement causes temperature change and can not correct；Then according near point electric thermo-couple temperature measured value and actual tests part temperatureBetween relationship, make the temperature field value of the intracorporal practical heating temperature field test requirements document of experimental box, then stop to be testedPart heating and rotation；After test specimen to be measured, which measures revised actual temperature, reaches the temperature field of test requirements document, it can remember simultaneouslyThe temperature of near point thermocouple maintains temperature field to be made to be measured according to the size of testpieces and structural thermal insulation enough time when record is shut downTest specimen heat penetration, guarantee test part temperature field Pass Test temperature requirement, can be completed the hot rotation test of engine rotor partThermometric treats test block and starts formally to carry out hot test, and this method measurement accuracy is high, adaptable, may be mounted at temperatureAny position of field, meets the problem of Complex Temperature field measurement.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention.
Fig. 2 is heater assembly structural schematic diagram of the present invention.
Wherein, 1, heater assembly；2, multi way temperature adjuster；3, heater power cabinet；4, testpieces is surveyed；5, experimental boxBody；6, near point thermocouple；7, thermograph display；8, stretch thermocouple；9, telescopic device；10, moisture recorder；11, magneticStick；12, resistance wire；13, power connection.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing:
As shown in Figure 1 and Figure 2, the hot rotatory test temperature measuring equipment of a kind of engine rotor part, including experimental box body 5, it is realUpper end is equipped with the rotating shaft device for installing test specimen 4 to be measured in tryoff body 5, and 5 inner wall of experimental box body is equipped with insulating layer, for tryingChamber inside holding during testing prevents temperature change too fast, and 5 bottom of experimental box body is equipped with heater assembly 1, experimental box body5 inner sidewalls are fixed near point thermocouple 6 and flexible thermocouple 8, and flexible thermocouple 8 is fixed on experimental box body 5 by telescopic device 9Interior, near point thermocouple 6 is fixedly installed in right above test specimen 4 to be measured position to be measured；It is to be measured that heater assembly 1 is located at survey testpieces 4Immediately below the rotating path of position；
It surveys the position rotating path to be measured of testpieces 4 and is arranged right below multiple heater assemblies 1, heater assembly 1 passes through moreRoad thermoregulator 2 connects having heaters power cabinet 3, and heater power cabinet 3 is used as battery main switch, multi way temperature adjuster 2For adjusting multiple 1 rates of heat addition of heater assembly and heating temperature；
Heater assembly 1 uses resistance heater, including bar magnet 11 and the resistance wire 12 being wrapped on bar magnet 11, bar magnet 11One end be equipped with power connection 13,11 other end of bar magnet be equipped with anchor tip, anchor tip for will have resistance wire 12 magneticStick 11 is whole to be fixedly mounted in experimental box body 5, and 11 other end of bar magnet is fixedly mounted in experimental box body 5 by fixed bracket.
Flexible thermocouple 8 can be contacted by telescopic device 9 with test specimen 4 to be measured surface of position to be measured；
Telescopic device 9 is using Telescopic-cylinder structure or uses crank connecting link telescoping mechanism, and 5 side wall of experimental box body is equipped with logicalHole, the telescopic arm of telescopic device 9 pass through 5 lateral through aperture of experimental box body and are placed in experimental box body 5, and flexible thermocouple 8, which is fixed on, to be stretchedOn the telescopic arm of compression apparatus 9；Flexible thermocouple 8 is connected with moisture recorder 10；
Near point thermocouple 6 is connected with thermograph display 7 by conducting wire, and thermograph display 7 for recording in real timeNear point thermocouple 6 measures obtained temperature value and displays temperature；
Near point thermocouple 6 is not more than 20mm right above test specimen 4 to be measured position to be measured；
A kind of hot rotation test temp measuring method of engine rotor part, comprising the following steps:
Test specimen 4 and temperature measuring equipment to be measured: rotation test specimen 4 to be measured being installed in experimental box body 5 is fixedly mounted in step 1)On shaft device, heater assembly is arranged in bottom in experimental box body 5, and heater assembly 1, which is located at, surveys the rotation of the position to be measured of testpieces 4Immediately below path, near point thermocouple 6 is fixed on and is surveyed right above the position to be measured of testpieces 4 no more than at 20mm；
The number and power of heater assembly are determined according to four testpieces structure, thickness, quality and maximum temperature factorsSize；The principle of hot component arrangement is: the high position heater assembly of temperature arranges that closeer or power is larger；Reference thermocoupleIt is arranged near testpieces temperature profile position, arranges near point thermocouple in 4 top of test specimen to be measured, lower part and outer rim, revolve manuallyTurn testpieces, guarantees that near point thermocouple and testpieces do not touch mill；Fixed flexible thermocouple mechanism, it is to be measured in test specimen 4 to be measuredFlexible thermocouple is arranged at position, corresponding with the position of near point thermocouple, adjusts telescoping mechanism, checks telescoping mechanism in closureWhether flexible thermocouple is in close contact with testpieces, and when telescoping mechanism is opened, whether flexible thermocouple and testpieces are completeTotal detachment；
Step 2) will be treated test block 4 under 10%~20% revolving speed of the rotating shaft device under maximum test speed and be carried outHeating, heating maximum temperature are no more than test requirements document temperature field temperature；
It is heated specifically, rotating shaft device to be treated to test block 4 under 1000rpm-2000rpm revolving speed；
In heating process, interval thermometric record is carried out using near point thermocouple 6, by the temperature of all temperature values and test requirements documentDegree field is compared, if local temperature rises very fast heater assembly output power at the very fast local temperature of reduction heating；If local temperature rises slower heater assembly output power at the very fast local temperature of increase heating, the rate of heat addition is controlledIn the range of test requirements document；
Step 3) treats test block detected part progress thermometric record using near point thermocouple, when near point thermocouple measuresWhen 4 detected part temperature of test specimen to be measured reaches test requirements document temperature field temperature 80%, it is simultaneously stopped test specimen 4 to be measured rotation and to addingHot device assembly heating, after 4 revolving speed of test specimen to be measured drops to zero, treats 4 detected part surface of test block using flexible thermocouple 8 and connectsTouching thermometric simultaneously records 4 detected part rotor actual temperature of test specimen to be measured, while recording the near point thermocouple 6 at corresponding detected partMeasure temperature value, and at the same time record flexible thermocouple 8 move closer to 4 detected part of test specimen to be measured and contact measured test specimen 4 to8 temperature variation curve of flexible thermocouple after surveying position；
After 4 revolving speed of test specimen to be measured is zero, thermocouple 8 is stretched during 4 detected part of test specimen to be measured, and stretch thermoelectricityEven 8 temperature are in rising trend, the temperature that flexible thermocouple 8 measures when flexible thermocouple 8 touches 4 detected part of test specimen to be measuredIt is worth highest, as the flexible 4 detected part time of 8 contact measured test specimen of thermocouple extends, flexible thermocouple 8 measures temperature and gradually dropsIt is low；So it is inflection point time S that flexible thermocouple 8, which touches the 4 detected part moment of test specimen to be measured,j, temperature at this time is inflection point temperatureSpend tA；
4 detected part of test specimen to be measured stops the actual temperature T at heating momentIt is realAre as follows:
TIt is real=tA+△t
In formula: tA--- the temperature that flexible thermocouple is contacted with test specimen detected part to be measured, i.e. inflection temperature；△t——Temperature corrected value；
△ t=a* △ s, △ s is that heater assembly stops the heating moment to flexible thermocouple and test specimen detected part to be measuredTime of contact interval,
A is test specimen detected part rate of temperature fall to be measured, a=(tA-tA-t)/t；
T is the interval moment after flexible thermocouple is contacted with test specimen detected part to be measured, tA-tFor flexible thermocouple with it is to be measuredThe temperature value of moment t moment is spaced after the contact of test specimen detected part；
6 temperature of near point thermocouple is T when step 4), stopping test specimen to be measured are rotated and heated to heater assemblyStop, near point heat6 temperature-compensating △ t of galvanic coupler=TIt is real-TStop；It therefore can be in the hope of 6 measured temperature T of near point thermocoupleStop=TIt is real-△tr, according to temperatureCompensate △ tr, actual temperature T when test specimen to be measured stops operating when acquiring Pass Test temperatureIt is realThe default near point heat for needing to meet6 temperature T of galvanic coupleStop, that is, complete the hot rotation test thermometric of test specimen to be measured.
Test specimen detected part to be measured surface actual temperature is measured according to step 3), when test specimen to be measured measures revised realityAfter temperature reaches the temperature field of test requirements document, the temperature of near point thermocouple 6 maintains temperature field when stopping heating according to heating component,It is kept the temperature according to the size of testpieces and structure, makes 4 heat penetration of test specimen to be measured, guarantee test part temperature field Pass Test temperature is wantedIt asks, the hot rotation test thermometric of engine rotor part can be completed, treat test block and start formally to carry out hot test.