CN114034488A - Test system and method for reliability of engine telemetering instrument - Google Patents

Test system and method for reliability of engine telemetering instrument Download PDF

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Publication number
CN114034488A
CN114034488A CN202111273154.4A CN202111273154A CN114034488A CN 114034488 A CN114034488 A CN 114034488A CN 202111273154 A CN202111273154 A CN 202111273154A CN 114034488 A CN114034488 A CN 114034488A
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China
Prior art keywords
temperature
test
rotor assembly
reliability
main shaft
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CN202111273154.4A
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Chinese (zh)
Inventor
刘海荣
孙照莹
李明华
范毅
张小鹏
杨振宇
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XI'AN XIANGXUN TECHNOLOGY CO LTD
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XI'AN XIANGXUN TECHNOLOGY CO LTD
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Priority to CN202111273154.4A priority Critical patent/CN114034488A/en
Publication of CN114034488A publication Critical patent/CN114034488A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00—Testing of engines
    • G01M15/14—Testing gas-turbine engines or jet-propulsion engines
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • G01M99/002—Thermal testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Testing Of Engines (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

The invention provides a system and a method for testing the reliability of an engine telemetering instrument, which solve the problem that a device for verifying and testing the reliability of a plurality of elements of the telemetering instrument does not exist in the prior art. The system comprises a fixed platform, a main shaft, a measuring sensor, a reference sensor, a calibrator, a standard source, a rotating mechanism, a lifting platform, a heating module and a computer; the main shaft is positioned above the fixed platform, and the upper end of the main shaft is provided with a slip ring; the measuring sensor and the reference sensor are adjacently arranged on the main shaft, and the measuring sensor is used for being connected with the signal input of the rotor assembly; the calibrator is connected with the reference sensor through a slip ring; the standard source is connected with the electric signal input of the rotor assembly through the slip ring; the rotating mechanism is used for driving the main shaft to rotate; the lifting platform is used for driving the main shaft to move up and down; the heating module is arranged on the periphery of the lower parts of the rotor assembly and the main shaft, the measuring sensor and the reference sensor are both positioned in the heating module, and the lower end of the rotor assembly extends out of the heating module; the computer is used for being connected with the stator assembly.

Description

Test system and method for reliability of engine telemetering instrument
Technical Field
The invention belongs to the technical field of engine running state monitoring equipment, relates to a remote measuring instrument testing technology, and particularly relates to a testing system and a testing method for performing a reliability test on a remote measuring instrument of a rotating part of an engine.
Background
The test technology is one of three support technologies of the aero-engine parallel to design and material technology, and is an effective way for examining new materials, new technologies, new structures and new technologies of the engine. The measurement aiming at the moving parts of the engine under the high-temperature and high-rotation environment such as a turbine, a wheel disc and a wheel shaft is the necessary test content for the design verification of the engine. In the test, the sensor needs to be arranged on the surface of a moving part and rotates at a high speed along with the rotor, and signals are difficult to be directly led out to ground equipment for analysis and processing. In this regard, wireless telemetry instruments have been developed that can be mounted on the shaft ends of the rotor for transmitting sensor signal acquisition to surface equipment.
Because the aeroengine test facilities and equipment are complex, the test technology is complex and difficult, the test items are multiple, the period is long, the cost is high and the risk is high, the requirements on the precision and the reliability of instruments used in the test process are high. The engine rotating part remote measuring instrument is an important component of an engine complete machine and a part testing facility, and the reliability of the engine rotating part remote measuring instrument plays an important role in the effectiveness of an engine test.
Different from common ground test equipment, the engine rotating part remote measuring instrument is arranged in the engine, the working environment has the characteristics of high temperature, high rotation and high vibration, and the working environment is extremely severe. The aero-engine is a heat engine, the internal working temperature of the aero-engine can reach 2000 ℃, the turbine shaft temperature can still reach 300 ℃ despite the adoption of thermal barrier coating, airflow heat dissipation, heat insulation and heat dissipation and other modes, and the internal working temperature of the aero-engine is far higher than the reliable working temperature of electronic components. The rotor speed of an aeroengine is generally more than 10000RPM, the rotating speed of some small-sized turboshaft engines can reach 60000RPM, a telemetering instrument needs to bear extremely large centrifugal load, and flexible vibration formed by high-speed rotation has large influence on the telemetering instrument. Therefore, the telemetry equipment must be verified through sufficient tests before being put into use to ensure its operational reliability.
At present, no effective testing device exists, and multi-factor reliability verification can be performed on a telemetering instrument. Before the device is put into use, basic functional performance tests can be carried out only in a laboratory environment, and the difference from a real working environment is large; the real working environment is contacted only when the test platform is delivered and used, a large amount of joint debugging and troubleshooting work needs to be carried out on the site, and the actual test process is greatly influenced. And because the full test verification can not be carried out before delivery, the reliability of the product is uncertain, and once a problem occurs in the long-time working process, the test data can be lost and even the test fails.
Disclosure of Invention
The invention provides a system and a method for testing the reliability of an engine telemetering instrument, aiming at solving the technical problems that the existing testing device for multi-element reliability verification of the telemetering instrument does not exist, only basic function performance testing can be carried out, and sufficient test verification cannot be carried out, so that the reliability is uncertain, and test data loss and even test failure are caused in the working process.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a test system for reliability of an engine telemetering instrument, the telemetering instrument comprises a stator assembly and a rotor assembly matched with the stator assembly, and is characterized in that: the device comprises a fixed platform, a main shaft, a measuring sensor, a reference sensor, a calibrator, a standard source, a rotating mechanism, a lifting platform, a heating module and a computer;
the fixed platform is used for mounting a stator assembly of the telemetering instrument;
the main shaft is positioned above the fixed platform, the lower end of the main shaft is used for mounting a rotor assembly of a telemetering instrument, and the upper end of the main shaft is provided with a slip ring;
the measuring sensor and the reference sensor are adjacently arranged on the main shaft, and the measuring sensor is used for being connected with the electric signal input of the rotor assembly;
the calibrator is connected with the reference sensor through a slip ring;
the standard source is connected with the electric signal input of the rotor assembly through a slip ring;
the rotating mechanism is used for driving the main shaft to rotate;
the lifting platform is used for driving the main shaft to move up and down, so that the distance between the stator assembly and the rotor assembly meets the test requirement; the stator component receives data of the rotor component through photoelectric communication;
the heating module is arranged on the periphery of the lower parts of the rotor assembly and the main shaft, the measuring sensor and the reference sensor are both positioned in the heating module, and the lower end of the rotor assembly extends out of the heating module;
the computer is used for being connected with the stator assembly.
Further, a calibration sensor for verifying the measurement sensor and the reference sensor is included.
Further, the main shaft is of a hollow structure;
the heating module is a heater.
Further, the lower end of the main shaft is provided with an adaptive flange used for connecting the rotor assembly.
Furthermore, the rotating mechanism is a high-speed motor installed on the lifting platform, and the output of the rotating mechanism is connected with the main shaft.
Meanwhile, the invention provides a test method for the reliability of the engine telemeter, which is characterized in that the test system for the reliability of the engine telemeter comprises the following steps:
1) mounting of
1.1) connecting a measuring sensor to the electric signal input of a rotor assembly, and connecting a reference sensor with a calibrator through a slip ring;
1.2) mounting a stator assembly of a measured telemetering instrument on a fixed platform, mounting a rotor assembly at the lower end of a main shaft, coaxially arranging the stator assembly and the rotor assembly, and connecting a standard source to the electric signal input of the rotor assembly;
1.3) adjusting the main shaft to move up and down through the lifting platform, so that the distance between the stator assembly and the rotor assembly meets the test requirement;
2) test of
The test comprises a static normal temperature test a, a static high temperature test b, a low rotating speed high temperature test c and a high rotating speed high temperature test d;
the static normal temperature test a specifically comprises the following steps:
a.1) functional testing
a.1.1) one output temperature A given standard Source0A standard source inputs a corresponding thermoelectric potential signal to the rotor assembly through a slip ring;
a.1.2) electrifying the telemetered instrument to be detected, amplifying the thermoelectric potential signal in the step a.1.1) by a circuit in the rotor assembly and performing AD conversion to generate a digitized thermoelectric potential value E1, transmitting the value to the stator assembly, acquiring the thermoelectric potential value E2 output by the stator assembly by the computer, and obtaining the corresponding temperature A1C, comparative temperature A0DEG C and temperature A1If the difference value of the two is within the error allowable range, executing the step a.2); if not, the reliability of the remote measuring instrument is unqualified at the static normal temperature, and the static normal temperature test a is finished;
a.2) Performance testing
a.2.1) temperature B of the reference sensor read by the calibrator0℃；
Meanwhile, the temperature measured by the measuring sensor is transmitted to the stator assembly through the rotor assembly, and the computer reads the temperature B of the stator assembly1℃；
a.2.2) comparison of the temperatures B0DEG C and B1If the difference value of the temperature and the temperature is within the error allowable range, the reliability of the telemetering instrument is qualified under the static normal temperature; if not, the product is not qualified;
the static high-temperature test b specifically comprises the following steps:
b.1) construction of test conditions
Starting the heating module to enable the temperature of the rotor assembly in the heating module to reach the test set high temperature;
b.2) functional testing
b.2.1) one output temperature C of the given standard source0A standard source inputs a corresponding thermoelectric potential signal to the rotor assembly through a slip ring;
b.2.2) electrifying the tested telemeter, amplifying the thermoelectric potential signal in the step b.2.1) by a circuit in the rotor component and performing AD conversion to generate a digitized thermoelectric potential value E3, transmitting the value to the stator component, collecting the thermoelectric potential value E4 output by the stator component by the computer, and obtaining the corresponding temperature C1C, comparative temperature C0DEG C and temperature C1C, if the difference value of the two is within the error allowable range, executing the step b.3); if not, the reliability of the remote measuring instrument is unqualified under the static high temperature, and the static high temperature test b is finished;
b.3) Performance testing
b.3.1) temperature D of the reference sensor read by the calibrator0℃；
Meanwhile, the temperature measured by the measuring sensor is transmitted to the stator assembly through the rotor assembly, and the computer reads the temperature D of the stator assembly1℃；
b.3.2) comparison of the temperatures D0DEG C and D1If the difference value of the temperature and the temperature is within the error allowable range, the reliability of the telemetering instrument is qualified under the static high temperature; if not, the product is not qualified;
the low-rotation-speed high-temperature test c specifically comprises the following steps:
c.1) construction of test conditions
Starting a rotating mechanism to enable the rotating speed of the main shaft to reach a set low rotating speed;
starting the heating module to enable the temperature of the rotor assembly in the heating module to reach the test set high temperature;
c.2) functional testing
c.2.1) given a standard source an output temperature F0A standard source inputs a corresponding thermoelectric potential signal to the rotor assembly through a slip ring;
c.2.2) electrifying the telemetered instrument to be detected, amplifying the thermoelectric potential signal in the step c.2.1) by a circuit in the rotor assembly and performing AD conversion to generate a digitized thermoelectric potential value E5, transmitting the value E5 to the stator assembly, and acquiring the thermoelectric potential value E6 output by the stator assembly by the computerAnd obtaining a corresponding temperature F1DEG C, comparative temperature F0DEG C and temperature F1C.3), if the difference value of the two is within the error allowable range, executing the step c.3); if not, the reliability of the telemetering instrument is unqualified at low rotating speed and high temperature, and the low rotating speed and high temperature test c is finished;
c.3) testing of the Properties
c.3.1) temperature G of the reference sensor read by the calibrator0℃；
Meanwhile, the temperature measured by the measuring sensor is transmitted to the stator assembly through the rotor assembly, and the computer reads the temperature G of the stator assembly1℃；
c.3.2) comparison of the temperatures G0DEG C and G1If the difference value of the temperature and the temperature is within the error allowable range, the reliability of the telemetering instrument is qualified at low rotating speed and high temperature; if not, the product is not qualified;
the high-rotating-speed high-temperature test d specifically comprises the following steps:
d.1) construction of test conditions
Starting a rotating mechanism to enable the rotating speed of the main shaft to reach a set high rotating speed;
starting the heating module to enable the temperature of the rotor assembly in the heating module to reach the test set high temperature;
d.2) functional testing
d.2.1) one output temperature H for a given standard source0A standard source inputs a corresponding thermoelectric potential signal to the rotor assembly through a slip ring;
d.2.2) electrifying the telemetered instrument to be detected, amplifying the thermoelectric potential signal in the step d.2.1) by a circuit in the rotor assembly and performing AD conversion to generate a digitized thermoelectric potential value E7, transmitting the value to the stator assembly, collecting the thermoelectric potential value E8 output by the stator assembly by the computer, and obtaining the corresponding temperature H1DEG C, comparative temperature H0DEG C and temperature H1C, if the difference value of the two is within the error allowable range, executing the step d.3); if not, the reliability of the remote measuring instrument is unqualified at high rotating speed and high temperature, and the high rotating speed and high temperature test d is finished;
d.3) Performance testing
d.3.1) temperature I of the reading reference sensor of the calibrator0℃；
Meanwhile, the temperature measured by the measuring sensor is transmitted to the stator assembly through the rotor assembly, and the computer reads the temperature I of the stator assembly1℃；
c.3.2) comparison of the temperatures I0DEG C and I1If the difference value of the temperature and the temperature is within the error allowable range, the reliability of the telemetering instrument is qualified under the conditions of high rotating speed and high temperature; if not, the product is not qualified;
3) telemetry instrument reliability determination
And when the reliability of the telemetering instrument is qualified at the static normal temperature, the static high temperature, the low rotating speed high temperature and the high rotating speed high temperature, the reliability of the tested telemetering instrument is qualified.
Further, step 1.1) is preceded by a step of verifying the measurement sensor and the reference sensor:
the standard heat source gives a temperature to the main shaft, and the calibration sensor measures the temperature M of the main shaft0Simultaneously, the calibrator respectively obtains the temperatures M of the measuring sensors1DEG C and temperature M of the reference sensor2DEG C, comparative temperature M1℃、M2DEG C and M0If the temperature is consistent with the temperature, executing the step 1.1), if not, replacing the temperature with M0A measuring sensor and a reference sensor with inconsistent temperature.
Meanwhile, the invention also provides another test method for the reliability of the engine telemeter, which is characterized in that the test system for the reliability of the engine telemeter comprises the following steps:
1) mounting of
1.1) connecting a measuring sensor to the electric signal input of a rotor assembly, and connecting a reference sensor with a calibrator through a slip ring;
1.2) mounting a stator assembly of a measured telemetering instrument on a fixed platform, mounting a rotor assembly at the lower end of a main shaft, coaxially arranging the stator assembly and the rotor assembly, and connecting a standard source to the electric signal input of the rotor assembly;
1.3) adjusting the main shaft to move up and down through the lifting platform, so that the distance between the stator assembly and the rotor assembly meets the test requirement;
2) test of
The test comprises a static normal temperature test a, a static high temperature test b, a low rotating speed high temperature test c and a high rotating speed high temperature test d;
the static normal temperature test a specifically comprises the following steps:
a.1) one output temperature A given standard source0A standard source inputs a corresponding thermoelectric potential signal to the rotor assembly through a slip ring;
at the same time, the calibrator reads the temperature B of the reference sensor0℃；
a.2) powering on a tested telemetering instrument;
a.3) the circuit in the rotor component amplifies the thermoelectric potential signal in the step a.1) and performs AD conversion to generate a digitized thermoelectric potential value E1 which is transmitted to the stator component, and the computer acquires the thermoelectric potential value E2 output by the stator component and obtains the corresponding temperature A1℃；
Meanwhile, the temperature measured by the measuring sensor is transmitted to the stator assembly through the rotor assembly, and the computer reads the temperature B of the stator assembly1℃；
a.4) comparison of temperatures A0DEG C and A1DEG C, and a temperature B0DEG C and B1DEG C, if A0DEG C and A1Difference of degree C, B0DEG C and B1If the difference values of the temperature are within the error allowable range, the reliability of the telemetering instrument is qualified under the static normal temperature; if not, the product is not qualified;
the static high-temperature test b specifically comprises the following steps:
b.1) construction of test conditions
Starting the heating module to enable the temperature of the rotor assembly in the heating module to reach the test set high temperature;
b.2) one output temperature C given for the standard source0A standard source inputs a corresponding thermoelectric potential signal to the rotor assembly through a slip ring;
at the same time, the calibrator reads the temperature D of the reference sensor0℃；
b.3) powering on the tested telemetering instrument;
b.4) rotor AssemblyThe circuit in the step b.2) amplifies the thermoelectric potential signal and performs AD conversion to generate a digitized thermoelectric potential value E3 which is transmitted to the stator component, and the computer acquires the thermoelectric potential value E4 output by the stator component and obtains the corresponding temperature C1℃；
Meanwhile, the temperature measured by the measuring sensor is transmitted to the stator assembly through the rotor assembly, and the computer reads the temperature D of the stator assembly1℃；
b.5) comparison of the temperatures C0DEG C and temperature C1DEG C, and a temperature D0DEG C and D1C, if C0DEG C and C1Difference of degree C, D0DEG C and D1If the difference values of the temperature are within the error allowable range, the reliability of the telemetering instrument is qualified under the static high temperature; if not, the product is not qualified;
the low-rotation-speed high-temperature test c specifically comprises the following steps:
c.1) construction of test conditions
Starting a rotating mechanism to enable the rotating speed of the main shaft to reach a set low rotating speed;
starting the heating module to enable the temperature of the rotor assembly in the heating module to reach the test set high temperature;
c.2) giving an output temperature F of the reference source0A standard source inputs a corresponding thermoelectric potential signal to the rotor assembly through a slip ring;
at the same time, the calibrator reads the temperature G of the reference sensor0℃；
c.3) powering on the tested telemetering instrument;
c.4) amplifying the thermoelectric potential signal in the step c.2) by a circuit in the rotor assembly and performing AD conversion to generate a digitized thermoelectric potential value E5, transmitting the digitized thermoelectric potential value E5 to the stator assembly, acquiring the thermoelectric potential value E6 output by the stator assembly by the computer, and obtaining the corresponding temperature F61℃；
Meanwhile, the temperature measured by the measuring sensor is transmitted to the stator assembly through the rotor assembly, and the computer reads the temperature G of the stator assembly1℃；
c.5) comparison of the temperatures F0DEG C and temperature F1DEG C, and a comparative temperature G0DEG C and G1DEG C, if F0DEG C and F1Difference of degree C, G0DEG C and G1If the difference values of the temperature are within the error allowable range, the reliability of the telemetering instrument is qualified at low rotating speed and high temperature; if not, the product is not qualified;
the high-rotating-speed high-temperature test d specifically comprises the following steps:
d.1) construction of test conditions
Starting a rotating mechanism to enable the rotating speed of the main shaft to reach a set high rotating speed;
starting the heating module to enable the temperature of the rotor assembly in the heating module to reach the test set high temperature;
d.2) one output temperature H for a given standard source0A standard source inputs a corresponding thermoelectric potential signal to the rotor assembly through a slip ring;
at the same time, the calibrator reads the temperature I of the reference sensor0℃；
d.3) powering on the tested telemetering instrument;
d.4) amplifying the thermoelectric potential signal in the step d.2) by a circuit in the rotor assembly and performing AD conversion to generate a digitized thermoelectric potential value E7, transmitting the digitized thermoelectric potential value E7 to the stator assembly, acquiring the thermoelectric potential value E8 output by the stator assembly by the computer, and obtaining the corresponding temperature H1℃；
Meanwhile, the temperature measured by the measuring sensor is transmitted to the stator assembly through the rotor assembly, and the computer reads the temperature I of the stator assembly1℃；
d.5) comparison of the temperatures H0DEG C and temperature H1DEG C, and temperature I0DEG C and I1DEG C, if H0DEG C and H1Difference of DEG C, I0DEG C and I1If the difference values of the DEG C are within the error allowable range, the reliability of the telemetering instrument is qualified under the conditions of high rotating speed and high temperature; if not, the product is not qualified;
3) telemetry instrument reliability determination
And when the reliability of the telemetering instrument is qualified at the static normal temperature, the static high temperature, the low rotating speed high temperature and the high rotating speed high temperature, the reliability of the tested telemetering instrument is qualified.
Further, step 1.1) is preceded by a step of verifying the measurement sensor and the reference sensor:
the standard heat source gives a temperature to the main shaft, and the calibration sensor measures the temperature M of the main shaft0Simultaneously, the calibrator respectively obtains the temperatures M of the measuring sensors1DEG C and temperature M of the reference sensor2DEG C, comparative temperature M1℃、M2DEG C and M0If the temperature is consistent with the temperature, executing the step 1.1), if not, replacing the temperature with M0A measuring sensor and a reference sensor with inconsistent temperature.
Compared with the prior art, the invention has the advantages that:
1. the test system can simulate a high-temperature high-rotation-speed running environment which is nearly the same as the actual working environment of the measured telemetering instrument, realizes multi-element reliability verification of the telemetering instrument, and performs more sufficient test verification on the telemetering instrument at lower cost before the telemetering instrument is put into use, so that the product quality is ensured, the test efficiency of a user is improved, and the validity of test data of the user is ensured.
2. The invention can realize the calibration of the measuring sensor and the reference sensor by calibrating the sensor, thereby improving the reliability of the test.
3. The invention can be connected with the tested telemeters with different specifications through the adaptive flange, realizes the test of the telemeters under high-speed rotation and high-temperature environments, has wide application range and improves the reliability of products.
4. The test method comprises the steps of static normal temperature test, static high temperature test, low rotating speed high temperature test and high rotating speed high temperature test of the remote measuring instrument, the simulation of the real working environment of the remote measuring instrument, the full reliability test verification and the determination of the accuracy of the reliability test of the remote measuring instrument.
Drawings
FIG. 1 is a schematic diagram of a test system for engine telemetry instrument reliability according to the present invention;
wherein the reference numbers are as follows:
1-fixed platform, 2-main shaft, 3-measuring sensor, 4-reference sensor, 5-calibrator, 6-standard source, 7-rotating mechanism, 8-lifting platform, 81-frame, 82-moving table, 9-heating module, 10-computer, 11-stator module, 12-rotor module, 13-slip ring, 14-calibration sensor and 15-adapting flange.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
The tested piece is a telemetering instrument applied to testing of the rotary part of the aero-engine. The tested piece comprises a rotor assembly 12 and a stator assembly 11. In actual operation, the rotor assembly 12 is installed at one end of a turbine shaft of an engine and is connected to a sensor (such as a thermocouple, a strain gauge and the like) on a blade, a wheel disc or a wheel shaft through a lead wire so as to collect and process a sensor signal; the stator assembly 11 and the rotor assembly 12 are mounted relatively coaxially without contact. The stator assembly 11 powers the rotor assembly 12 through inductive powering and receives sensor data collected by the rotor assembly 12 through optoelectronic communication.
Because the rotor assembly 12 is installed at the shaft end of the turbine of the engine in actual operation, the rotor assembly 12 rotates at high speed along with the turbine shaft, bears large centrifugal load and vibration, is influenced by high-temperature radiation and shaft heat conduction, has high working temperature, and has high requirements on the reliability of an internal electronic circuit and a sensor lead interface of the rotor assembly. The reliability of the telemetering instrument plays an important role in the effectiveness of the engine test, so that the invention can carry out a multi-element reliability test on the telemetering instrument, and can carry out more sufficient test verification on the telemetering instrument at lower cost before the telemetering instrument is put into use, thereby ensuring the quality of the telemetering instrument and improving the test efficiency.
As shown in FIG. 1, the test system for the reliability of the engine telemetering instrument comprises a fixed platform 1, a main shaft 2, a measuring sensor 3, a reference sensor 4, a slip ring 13, a calibrator 5, a standard source 6, a rotating mechanism 7, a lifting platform 8, a heating module 9 and a computer 10.
The upper surface of the fixed platform 1 is used for mounting a stator assembly 11 of a telemetering instrument;
the main shaft 2 is positioned above the fixed platform 1, the main shaft 2 is machined by a stainless steel machine, a through hole is machined in the axis position and used for arranging lead wires, and a sensor arrangement point is reserved in the middle of the main shaft 2 and used for mounting a measurement sensor 3 and a reference sensor 4; the lower end of the main shaft 2 is coaxially connected with an adaptive flange 15, the adaptive flange 15 is used for connecting a rotor assembly 12 of a measured telemetering instrument, the upper end of the main shaft 2 is provided with a slip ring 13, and the slip ring 13 adopts a plurality of paths of high-speed slip rings;
the measuring sensor 3 and the reference sensor 4 are adjacently arranged on the main shaft 2, and the measuring sensor 3 is a K-type thermocouple; the measurement sensor 3 is connected to the electrical signal input of the rotor assembly 12 for providing a sensor signal input to a measured telemetry instrument;
the calibrator 5 is connected with the reference sensor 4 through a slip ring 13; the standard source 6 is connected to the electrical signal input of the rotor assembly 12 via a slip ring 13;
the rotating mechanism 7 is used for driving the main shaft 2 to rotate, the rotating mechanism 7 of the embodiment uses an alternating current synchronous high-speed motor, the output of the high-speed motor is coaxially connected with the main shaft 2, and the rotating speed of the main shaft 2 can be adjusted according to test requirements. In other embodiments, the high-speed motor may have two output shafts, and the slip ring 13 at the upper end of the main shaft 2 is connected to one of the output shafts, and the other output shaft is coaxially connected to the main shaft 2.
This embodiment lift platform 8 includes frame 81 and installs motion platform 82 on frame 81 through linear slide, and high speed motor installs in the middle part of motion platform 82, and motion platform 82 drives high speed motor and main shaft 2 whole and reciprocates, adjusts the position of rotor subassembly 12, makes the interval of stator module 11 and rotor subassembly 12 satisfy experimental requirement. The frame 81 is assembled by welding aluminum alloy sections for supporting the whole structure.
The heating module 9 of the present embodiment is a heater provided at the periphery of the lower portion of the rotor assembly 12 and the main shaft 2 for heating and simulating a high temperature working environment, and the measuring sensor 3 and the reference sensor 4 are located in the heater, preferably at the upper portion of the heater, and the lower end of the rotor assembly 12 extends out of the heater. The heater adopts stainless steel ceramic heating ring, and the heater surrounds measuring transducer 3, reference sensor 4 and rotor subassembly 12, provides high temperature environment through radiant heating, and the heater temperature is set up by the temperature controller.
The computer 10 is used for connecting with the stator assembly 11 and collecting data output by the stator assembly 11.
The test system of the embodiment further comprises a non-contact calibration sensor 14 for providing a calibration signal for the test system for verifying the measurement sensor 3 and the reference sensor 4; the calibration sensor 14 adopts an infrared temperature sensor, the output is a serial port signal, and the temperature measuring point of the calibration sensor 14 is the same as the temperature measuring point of the measuring sensor 3. The test system of the embodiment simulates a high-temperature high-rotation running environment which is close to the actual working environment of the tested piece; providing a redundant channel to access a standard source and leading out a sensing signal; using a calibration sensor to perform synchronous monitoring comparison on test data; and the device also can be designed in multiple heating modes and multiple temperature zones, and can provide different temperature curves for the sensor and the tested piece.
The test process of the test system for the reliability of the engine telemetering instrument specifically comprises the following steps:
1) mounting of
1.1) connecting the measuring sensor 3 to the electrical signal input of the rotor assembly 12, the reference sensor 4 is connected with the calibrator 5 through a slip ring 13;
1.2) a rotor assembly 12 of the tested telemetering instrument is arranged on an adaptive flange 15 at the lower end of the main shaft 2, and a standard source 6 is connected to an electric signal input of the rotor assembly 12; the stator assembly 11 is arranged on the fixed platform 1, connected with a power supply and a computer 10 through a signal wire, and the stator assembly 11 is adjusted to align the axes of the stator assembly 11 and the rotor assembly 12;
1.3) adjusting the main shaft 2 to move up and down through the lifting platform 8, so that the distance between the stator assembly 11 and the rotor assembly 12 meets the test requirement;
2) test of
The test comprises a static normal temperature test a, a static high temperature test b, a low rotating speed high temperature test c and a high rotating speed high temperature test d;
the measuring sensor 3 and the reference sensor 4 both adopt a contact type to measure the temperature of the main shaft 2. Since the mounting locations are substantially the same, the output temperature values should be close. The reference sensor 4 is output through the check meter 5, and the output result is credible. The measuring sensor 3 outputs through the telemetering instrument, so that the output of the telemetering instrument can be compared with the output of the reference sensor 4 to judge whether the telemetering instrument works normally.
The static normal temperature test a specifically comprises the following steps:
a.1) functional testing
a.1.1) given an output temperature A of the reference source 60The standard source 6 inputs a corresponding thermoelectric potential signal to the rotor assembly 12 through the slip ring 13;
a.1.2) electrifying the telemetered instrument to be detected, amplifying the thermoelectric potential signal in the step a.1.1) by a circuit in the rotor assembly 12 and performing AD conversion to generate a digitized thermoelectric potential value E1, transmitting the digitized thermoelectric potential value E1 to the stator assembly 11, acquiring the thermoelectric potential value E2 output by the stator assembly 11 by the computer 10, and obtaining the corresponding temperature A1C, comparative temperature A0DEG C and temperature A1If the difference value of the two is within the error allowable range, executing the step a.2); if not, the reliability of the remote measuring instrument is unqualified at the static normal temperature, and the static normal temperature test a is finished;
a.2) Performance testing
a.2.1) the calibrator 5 reads the temperature B of the reference sensor 40℃；
Meanwhile, the temperature measured by the measuring sensor 3 is transmitted to the stator assembly 11 through the rotor assembly 12, and the computer 10 reads the temperature B of the stator assembly 111℃；
a.2.2) comparison of the temperatures B0DEG C and B1If the difference value of the temperature and the temperature is within the error allowable range, the reliability of the telemetering instrument is qualified under the static normal temperature; if not, the product is not qualified;
the static high-temperature test b specifically comprises the following steps:
b.1) construction of test conditions
Starting the heating module 9 to enable the temperature of the rotor assembly 12 in the heating module 9 to reach the test set high temperature;
b.2) functional testing
b.2.1) one output temperature C of the reference source 60The standard source 6 inputs a corresponding thermoelectric potential signal to the rotor assembly 12 through the slip ring 13;
b.2.2) electrifying the tested telemetering instrument, and generating numbers after the circuit in the rotor component 12 amplifies the thermoelectric force signals in the step b.2.1) and performs AD conversionThe digitalized thermoelectric potential value E3 is transmitted to the stator assembly 11, the computer 10 collects the thermoelectric potential value E4 output by the stator assembly 11 and obtains the corresponding temperature C1C, comparative temperature C0DEG C and temperature C1C, if the difference value of the two is within the error allowable range, executing the step b.3); if not, the reliability of the remote measuring instrument is unqualified under the static high temperature, and the static high temperature test b is finished;
b.3) Performance testing
b.3.1) the calibrator 5 reads the temperature D of the reference sensor 40℃；
Meanwhile, the temperature measured by the measuring sensor 3 is transmitted to the stator assembly 11 through the rotor assembly 12, and the computer 10 reads the temperature D of the stator assembly 111℃；
b.3.2) comparison of the temperatures D0DEG C and D1If the difference value of the temperature and the temperature is within the error allowable range, the reliability of the telemetering instrument is qualified under the static high temperature; if not, the product is not qualified;
the low-rotation-speed high-temperature test c specifically comprises the following steps:
c.1) construction of test conditions
Starting the rotating mechanism 7 to enable the rotating speed of the main shaft 2 to reach the set low rotating speed;
starting the heating module 9 to enable the temperature of the rotor assembly 12 in the heating module 9 to reach the test set high temperature;
c.2) functional testing
c.2.1) given an output temperature F of the reference source 60The standard source 6 inputs a corresponding thermoelectric potential signal to the rotor assembly 12 through the slip ring 13;
c.2.2) electrifying the tested telemeter, amplifying the thermoelectric potential signal in the step c.2.1) by a circuit in the rotor component 12 and performing AD conversion to generate a digitized thermoelectric potential value E5, transmitting the value to the stator component 11, acquiring the thermoelectric potential value E6 output by the stator component 11 by the computer 10, and obtaining the corresponding temperature F1DEG C, comparative temperature F0DEG C and temperature F1C.3), if the difference value of the two is within the error allowable range, executing the step c.3); if not, the reliability of the telemetering instrument is unqualified at low rotating speed and high temperature, and the low rotating speed and high temperature test c is finished;
c.3) testing of the Properties
c.3.1) the calibrator 5 reads the temperature G of the reference sensor 40℃；
Meanwhile, the temperature measured by the measuring sensor 3 is transmitted to the stator assembly 11 through the rotor assembly 12, and the computer 10 reads the temperature G of the stator assembly 111℃；
c.3.2) comparison of the temperatures G0DEG C and G1If the difference value of the temperature and the temperature is within the error allowable range, the reliability of the telemetering instrument is qualified at low rotating speed and high temperature; if not, the product is not qualified;
the high-speed high-temperature test d specifically comprises the following steps:
d.1) construction of test conditions
Starting the rotating mechanism 7 to enable the rotating speed of the main shaft 2 to reach the set high rotating speed;
starting the heating module 9 to enable the temperature of the rotor assembly 12 in the heating module 9 to reach the test set high temperature;
d.2) functional testing
d.2.1) given an output temperature H of the reference source 60The standard source 6 inputs a corresponding thermoelectric potential signal to the rotor assembly 12 through the slip ring 13;
d.2.2) electrifying the telemetered instrument to be detected, amplifying the thermoelectric potential signal in the step d.2.1) by a circuit in the rotor assembly 12 and performing AD conversion to generate a digitized thermoelectric potential value E7, transmitting the digitized thermoelectric potential value E7 to the stator assembly 11, acquiring the thermoelectric potential value E8 output by the stator assembly 11 by the computer 10, and obtaining the corresponding temperature H1DEG C, comparative temperature H0DEG C and temperature H1C, if the difference value of the two is within the error allowable range, executing the step d.3); if not, the reliability of the remote measuring instrument is unqualified at high rotating speed and high temperature, and the high rotating speed and high temperature test d is finished;
d.3) Performance testing
d.3.1) temperature I of reference sensor 4 is read by calibrator 50℃；
Meanwhile, the temperature measured by the measuring sensor 3 is transmitted to the stator assembly 11 through the rotor assembly 12, and the computer 10 reads the temperature I of the stator assembly 111℃；
c.3.2) comparative temperatureDegree I0DEG C and I1If the difference value of the temperature and the temperature is within the error allowable range, the reliability of the telemetering instrument is qualified under the conditions of high rotating speed and high temperature; if not, the product is not qualified;
3) telemetry instrument reliability determination
And when the reliability of the telemetering instrument is qualified at the static normal temperature, the static high temperature, the low rotating speed high temperature and the high rotating speed high temperature, the reliability of the tested telemetering instrument is qualified.
In order to improve the accuracy of the test, step 1.0) is further performed before step 1.1) to verify the measurement sensor 3 and the reference sensor 4, specifically as follows:
the measuring sensor 3 and the reference sensor 4 are respectively connected with the calibrator 5 through a slip ring 13; a standard heat source (not shown) gives the spindle 2 a temperature, and the temperature M of the spindle 2 is measured by a calibration sensor 140While the calibrator 5 obtains the temperature M DEG C of the measuring sensor 3 respectively1DEG C and the temperature M of the reference sensor 42DEG C, comparative temperature M1℃、M2DEG C and M0Whether the temperature is consistent or not, if so, executing the next step, namely step 1.1), and if not, replacing an unqualified sensor which is the temperature M0A measuring sensor 3 and a reference sensor 4 with inconsistent DEG C.
The signal input into the rotor assembly 12 of the telemetering instrument is amplified and AD-converted, and then the digitized thermoelectric potential value is sent to the stator assembly 11, and the stator assembly 11 sends data to the computer 10 through the network for display and storage. The rotor assembly 12 can be connected with a plurality of sensors, in the embodiment, the sensor signals accessed by the rotor assembly 12 are divided into two types, one type is a measuring sensor 3 (thermocouple) arranged on the main shaft 2, the actual temperature of the main shaft 2 is collected, and the actual temperature is output through a telemetering instrument; the other type is thermoelectric voltage output by the standard source 6 and used for simulating a thermocouple, and the specific temperature can be set through a program and the corresponding thermoelectric voltage is output, so that the test accuracy is improved. In addition, the standard source 6 can output a transient signal or a specific waveform to check the response time and linearity of the telemetric instrument in addition to a specific temperature value.
Example two
The difference from the first embodiment is that: the test process of the test system for the reliability of the engine telemeter comprises the following steps:
1) mounting of
1.1) connecting the measuring sensor 3 to the electrical signal input of the rotor assembly 12, the reference sensor 4 is connected with the calibrator 5 through a slip ring 13;
1.2) a rotor assembly 12 of the tested telemetering instrument is arranged on an adaptive flange 15 at the lower end of the main shaft 2, and a standard source 6 is connected to an electric signal input of the rotor assembly 12; the stator assembly 11 is arranged on the fixed platform 1, connected with a power supply and a computer 10 through a signal wire, and the stator assembly 11 is adjusted to align the axes of the stator assembly 11 and the rotor assembly 12;
1.3) adjusting the main shaft 2 to move up and down through the lifting platform 8, so that the distance between the stator assembly 11 and the rotor assembly 12 meets the test requirement;
2) test of
The test comprises a static normal temperature test a, a static high temperature test b, a low rotating speed high temperature test c and a high rotating speed high temperature test d;
the measuring sensor 3 and the reference sensor 4 both adopt a contact type to measure the temperature of the main shaft 2. Since the mounting locations are substantially the same, the output temperature values should be close. The reference sensor 4 is output through the check meter 5, and the output result is credible. The measuring sensor 3 outputs through the telemetering instrument, so that the output of the telemetering instrument can be compared with the output of the reference sensor 4 to judge whether the telemetering instrument works normally.
The static normal temperature test a specifically comprises the following steps:
a.1) one output temperature A given the standard source 60The standard source 6 inputs a corresponding thermoelectric potential signal to the rotor assembly 12 through the slip ring 13;
at the same time, the calibrator 5 reads the temperature B of the reference sensor 40℃；
a.2) powering on a tested telemetering instrument;
a.3) the circuit in the rotor component 12 amplifies the thermoelectric potential signal in the step a.1) and performs AD conversion to generate a digitized thermoelectric potential value E1 which is transmitted to the stator component 11, and the computer 10 adoptsThe thermoelectric potential value E2 output by the stator assembly 11 is collected, and the corresponding temperature A is obtained1℃；
Meanwhile, the temperature measured by the measuring sensor 3 is transmitted to the stator assembly 11 through the rotor assembly 12, and the computer 10 reads the temperature B of the stator assembly 111℃；
a.4) comparison of temperatures A0DEG C and A1DEG C, and a temperature B0DEG C and B1DEG C, if A0DEG C and A1Difference of degree C, B0DEG C and B1If the difference values of the temperature are within the error allowable range, the reliability of the telemetering instrument is qualified under the static normal temperature; if not, the product is not qualified;
the static high-temperature test b specifically comprises the following steps:
b.1) construction of test conditions
Starting the heating module 9 to enable the temperature of the rotor assembly 12 in the heating module 9 to reach the test set high temperature;
b.2) one output temperature C for a given reference source 60The standard source 6 inputs a corresponding thermoelectric potential signal to the rotor assembly 12 through the slip ring 13;
at the same time, the calibrator 5 reads the temperature D of the reference sensor 40℃；
b.3) powering on the tested telemetering instrument;
b.4) the circuit in the rotor component 12 amplifies the thermoelectric potential signal in the step b.2) and performs AD conversion to generate a digitized thermoelectric potential value E3 which is transmitted to the stator component 11, and the computer 10 acquires the thermoelectric potential value E4 output by the stator component 11 and obtains the corresponding temperature C1℃；
Meanwhile, the temperature measured by the measuring sensor 3 is transmitted to the stator assembly 11 through the rotor assembly 12, and the computer 10 reads the temperature D of the stator assembly 111℃；
b.5) comparison of the temperatures C0DEG C and temperature C1DEG C, and a temperature D0DEG C and D1C, if C0DEG C and C1Difference of degree C, D0DEG C and D1If the difference values of the temperature are within the error allowable range, the reliability of the telemetering instrument is qualified under the static high temperature; if not, the product is not qualified;
the low-rotation-speed high-temperature test c specifically comprises the following steps:
c.1) construction of test conditions
Starting the rotating mechanism 7 to enable the rotating speed of the main shaft 2 to reach the set low rotating speed;
starting the heating module 9 to enable the temperature of the rotor assembly 12 in the heating module 9 to reach the test set high temperature;
c.2) giving an output temperature F of the reference source 60The standard source 6 inputs a corresponding thermoelectric potential signal to the rotor assembly 12 through the slip ring 13;
at the same time, the calibrator 5 reads the temperature G of the reference sensor 40℃；
c.3) powering on the tested telemetering instrument;
c.4) amplifying the thermoelectric potential signal in the step c.2) by a circuit in the rotor assembly 12 and performing AD conversion to generate a digitized thermoelectric potential value E5, transmitting the digitized thermoelectric potential value E5 to the stator assembly 11, acquiring the thermoelectric potential value E6 output by the stator assembly 11 by the computer 10, and obtaining the corresponding temperature F1℃；
Meanwhile, the temperature measured by the measuring sensor 3 is transmitted to the stator assembly 11 through the rotor assembly 12, and the computer 10 reads the temperature G of the stator assembly 111℃；
c.5) comparison of the temperatures F0DEG C and temperature F1DEG C, and a comparative temperature G0DEG C and G1DEG C, if F0DEG C and F1Difference of degree C, G0DEG C and G1If the difference values of the temperature are within the error allowable range, the reliability of the telemetering instrument is qualified at low rotating speed and high temperature; if not, the product is not qualified;
the high-speed high-temperature test d specifically comprises the following steps:
d.1) construction of test conditions
Starting the rotating mechanism 7 to enable the rotating speed of the main shaft 2 to reach the set high rotating speed;
starting the heating module 9 to enable the temperature of the rotor assembly 12 in the heating module 9 to reach the test set high temperature;
d.2) giving the standard source 6 an output temperature H0Standard source 6 inputs a phase degree centigrade to rotor assembly 12 through slip ring 13A corresponding thermoelectric potential signal;
at the same time, the calibrator 5 reads the temperature I of the reference sensor 40℃；
d.3) powering on the tested telemetering instrument;
d.4) the circuit in the rotor assembly 12 amplifies the thermoelectric potential signal in the step d.2) and performs AD conversion to generate a digitized thermoelectric potential value E7, the digitized thermoelectric potential value E7 is transmitted to the stator assembly 11, the computer 10 acquires the thermoelectric potential value E8 output by the stator assembly 11, and the corresponding temperature H is obtained1℃；
Meanwhile, the temperature measured by the measuring sensor 3 is transmitted to the stator assembly 11 through the rotor assembly 12, and the computer 10 reads the temperature I of the stator assembly 111℃；
d.5) comparison of the temperatures H0DEG C and temperature H1DEG C, and temperature I0DEG C and I1DEG C, if H0DEG C and H1Difference of DEG C, I0DEG C and I1If the difference values of the DEG C are within the error allowable range, the reliability of the telemetering instrument is qualified under the conditions of high rotating speed and high temperature; if not, the product is not qualified;
3) telemetry instrument reliability determination
And when the reliability of the telemetering instrument is qualified at the static normal temperature, the static high temperature, the low rotating speed high temperature and the high rotating speed high temperature, the reliability of the tested telemetering instrument is qualified.
In order to improve the accuracy of the test, step 1.0) is further performed before step 1.1) to verify the measurement sensor 3 and the reference sensor 4, specifically as follows:
the measuring sensor 3 and the reference sensor 4 are respectively connected with the calibrator 5 through a slip ring 13; the standard heat source gives a temperature to the main shaft 2, and the temperature M of the main shaft 2 is measured by a calibration sensor0While the calibrator 5 obtains the temperature M DEG C of the measuring sensor 3 respectively1DEG C and the temperature M of the reference sensor 42DEG C, comparative temperature M1℃、M2DEG C and M0Whether the temperature is consistent or not, if so, executing the next step, namely step 1.1), and if not, replacing an unqualified sensor which is the temperature M0A measuring sensor 3 and a reference sensor 4 with inconsistent DEG C.
The above description is only for the preferred embodiment of the present invention and does not limit the technical solution of the present invention, and any modifications made by those skilled in the art based on the main technical idea of the present invention belong to the technical scope of the present invention.

Claims (9)

1. A test system for reliability of an engine telemetry instrument, comprising: the device comprises a fixed platform (1), a main shaft (2), a measuring sensor (3), a reference sensor (4), a calibrator (5), a standard source (6), a rotating mechanism (7), a lifting platform (8), a heating module (9) and a computer (10);
the fixed platform (1) is used for mounting a stator assembly (11) of a telemetric instrument;
the main shaft (2) is positioned above the fixed platform (1), the lower end of the main shaft is used for mounting a rotor assembly (12) of a telemetering instrument, and the upper end of the main shaft is provided with a slip ring (13);
the measuring sensor (3) and the reference sensor (4) are adjacently arranged on the main shaft (2), and the measuring sensor (3) is used for being connected with the electric signal input of the rotor assembly (12);
the calibrator (5) is connected with the reference sensor (4) through a slip ring (13);
the standard source (6) is connected with the electric signal input of the rotor assembly (12) through a slip ring (13);
the rotating mechanism (7) is used for driving the main shaft (2) to rotate;
the lifting platform (8) is used for driving the main shaft (2) to move up and down, so that the distance between the stator assembly (11) and the rotor assembly (12) meets the test requirement;
the heating module (9) is arranged on the periphery of the lower part of the rotor assembly (12) and the main shaft (2), the measuring sensor (3) and the reference sensor (4) are both positioned in the heating module (9), and the lower end of the rotor assembly (12) extends out of the heating module (9);
the computer (10) is used for being connected with the stator assembly (11).
2. The test system for reliability of an engine telemetry instrument as set forth in claim 1, wherein: a calibration sensor (14) is also provided for calibrating the measurement sensor (3) and the reference sensor (4).
3. A test system for reliability of an engine telemetry instrument according to claim 2, wherein: the main shaft (2) is of a hollow structure;
the heating module (9) is a heater.
4. A test system for testing the reliability of an engine telemetry instrument according to any one of claims 1 to 3, wherein: the lower end of the main shaft (2) is provided with an adaptive flange (15) used for connecting the rotor assembly (12).
5. The test system for reliability of an engine telemetry instrument of claim 4, wherein: the rotating mechanism (7) is a high-speed motor arranged on the lifting platform (8), and the output of the rotating mechanism is connected with the main shaft (2).
6. A method for testing reliability of an engine telemeter, characterized in that the system for testing reliability of an engine telemeter according to claim 1 is used, comprising the steps of:
1) mounting of
1.1) connecting a measuring sensor (3) to an electric signal input of a rotor assembly (12), and connecting a reference sensor (4) with a calibrator (5) through a slip ring (13);
1.2) a stator assembly (11) of a measured telemetering instrument is arranged on a fixed platform (1), a rotor assembly (12) is arranged at the lower end of a main shaft (2), the stator assembly (11) and the rotor assembly (12) are coaxially arranged, and a standard source (6) is connected to the electric signal input of the rotor assembly (12);
1.3) adjusting the main shaft (2) to move up and down through the lifting platform (8) so that the distance between the stator assembly (11) and the rotor assembly (12) meets the test requirement;
2) test of
The test comprises a static normal temperature test a, a static high temperature test b, a low rotating speed high temperature test c and a high rotating speed high temperature test d;
the static normal temperature test a specifically comprises the following steps:
a.1) functional testing
a.1.1) given a standard source (6) an output temperature A0The standard source (6) inputs a corresponding thermoelectric potential signal to the rotor assembly (12) through the slip ring (13);
a.1.2) the tested telemeter is electrified, a circuit in the rotor component (12) amplifies the thermoelectric potential signal in the step a.1.1) and performs AD conversion to generate a digitized thermoelectric potential value E1 which is transmitted to the stator component (11), and the computer (10) acquires the thermoelectric potential value E2 output by the stator component (11) and obtains the corresponding temperature A1C, comparative temperature A0DEG C and temperature A1If the difference value of the two is within the error allowable range, executing the step a.2); if not, finishing the static normal-temperature test a;
a.2) Performance testing
a.2.1) the calibrator (5) reads the temperature B of the reference sensor (4)0℃；
Meanwhile, the temperature measured by the measuring sensor (3) is transmitted to the stator component (11) through the rotor component (12), and the computer (10) reads the temperature B of the stator component (11)1℃；
a.2.2) comparison of the temperatures B0DEG C and B1If the difference value of the temperature and the temperature is within the error allowable range, the reliability of the telemetering instrument is qualified under the static normal temperature; if not, the product is not qualified;
the static high-temperature test b specifically comprises the following steps:
b.1) construction of test conditions
Starting the heating module (9) to enable the temperature of a rotor assembly (12) in the heating module (9) to reach the test set high temperature;
b.2) functional testing
b.2.1) given an output temperature C of the reference source (6)0The standard source (6) inputs a corresponding thermoelectric potential signal to the rotor assembly (12) through the slip ring (13);
b.2.2) the tested telemetering instrument is electrified, a circuit in the rotor component (12) generates a digital thermoelectric potential value E3 after amplifying and AD converting the thermoelectric potential signal in the step b.2.1), and transmits the value to the stator component (11), and the computer (10) collects the output of the stator component (11)And obtaining the corresponding temperature C1C, comparative temperature C0DEG C and temperature C1C, if the difference value of the two is within the error allowable range, executing the step b.3); if not, finishing the static high-temperature test b;
b.3) Performance testing
b.3.1) the temperature D of the reference sensor (4) is read by the calibrator (5)0℃；
Meanwhile, the temperature measured by the measuring sensor (3) is transmitted to the stator component (11) through the rotor component (12), and the computer (10) reads the temperature D of the stator component (11)1℃；
b.3.2) comparison of the temperatures D0DEG C and D1If the difference value of the temperature and the temperature is within the error allowable range, the reliability of the telemetering instrument is qualified under the static high temperature; if not, the product is not qualified;
the low-rotation-speed high-temperature test c specifically comprises the following steps:
c.1) construction of test conditions
Starting a rotating mechanism (7) to enable the rotating speed of the main shaft (2) to reach a set low rotating speed;
starting the heating module (9) to enable the temperature of a rotor assembly (12) in the heating module (9) to reach the test set high temperature;
c.2) functional testing
c.2.1) giving an output temperature F of the reference source (6)0The standard source (6) inputs a corresponding thermoelectric potential signal to the rotor assembly (12) through the slip ring (13);
c.2.2) electrifying the tested telemeter, amplifying the thermoelectric potential signal in the step c.2.1) by a circuit in the rotor component (12) and performing AD conversion to generate a digital thermoelectric potential value E5, transmitting the digital thermoelectric potential value E5 to the stator component (11), collecting the thermoelectric potential value E6 output by the stator component (11) by the computer (10), and obtaining the corresponding temperature F61DEG C, comparative temperature F0DEG C and temperature F1C.3), if the difference value of the two is within the error allowable range, executing the step c.3); if not, ending the low-rotation-speed high-temperature test c;
c.3) testing of the Properties
c.3.1) the temperature G of the reference sensor (4) is read by the calibrator (5)0℃；
Meanwhile, the temperature measured by the measuring sensor (3) is transmitted to the stator component (11) through the rotor component (12), and the computer (10) reads the temperature G of the stator component (11)1℃；
c.3.2) comparison of the temperatures G0DEG C and G1If the difference value of the temperature and the temperature is within the error allowable range, the reliability of the telemetering instrument is qualified at low rotating speed and high temperature; if not, the product is not qualified;
the high-rotating-speed high-temperature test d specifically comprises the following steps:
d.1) construction of test conditions
Starting a rotating mechanism (7) to enable the rotating speed of the main shaft (2) to reach a set high rotating speed;
starting the heating module (9) to enable the temperature of a rotor assembly (12) in the heating module (9) to reach the test set high temperature;
d.2) functional testing
d.2.1) setting an output temperature H of the reference source (6)0The standard source (6) inputs a corresponding thermoelectric potential signal to the rotor assembly (12) through the slip ring (13);
d.2.2) electrifying the tested telemeter, amplifying the thermoelectric potential signal in the step d.2.1) by a circuit in the rotor component (12) and performing AD conversion to generate a digital thermoelectric potential value E7, transmitting the digital thermoelectric potential value E7 to the stator component (11), collecting the thermoelectric potential value E8 output by the stator component (11) by the computer (10), and obtaining the corresponding temperature H1DEG C, comparative temperature H0DEG C and temperature H1C, if the difference value of the two is within the error allowable range, executing the step d.3); if not, finishing the high-rotation-speed high-temperature test d;
d.3) Performance testing
d.3.1) the temperature I of the reference sensor (4) is read by the calibrator (5)0℃；
Meanwhile, the temperature measured by the measuring sensor (3) is transmitted to the stator component (11) through the rotor component (12), and the computer (10) reads the temperature I of the stator component (11)1℃；
c.3.2) comparison of the temperatures I0DEG C and I1If the difference value of the temperature and the temperature is within the error allowable range, the reliability of the telemetering instrument is qualified under the conditions of high rotating speed and high temperature; if not, the product is not qualified;
3) telemetry instrument reliability determination
And the reliability of the telemetering instrument is qualified at a static normal temperature, a static high temperature, a low rotating speed high temperature and a high rotating speed high temperature, and the reliability of the telemetering instrument to be tested is qualified.
7. The test method for the reliability of engine telemetry instrumentation according to claim 6, characterized in that step 1.1) is preceded by a further step of verification of the measurement sensor (3) and the reference sensor (4):
the standard heat source gives a temperature to the main shaft (2), and the calibration sensor (14) measures the temperature M of the main shaft (2)0Simultaneously, the calibrator (5) respectively obtains the temperature G of the measuring sensor (3)1The temperature M of the reference sensor (4) and the DEG C2DEG C, comparative temperature M1℃、M2DEG C and M0If the temperature is consistent with the temperature, executing the step 1.1), if not, replacing the temperature with M0A measuring sensor (3) and a reference sensor (4) which are inconsistent at the temperature.
8. A method for testing reliability of an engine telemeter, characterized in that the system for testing reliability of an engine telemeter according to claim 1 is used, comprising the steps of:
1) mounting of
1.1) connecting a measuring sensor (3) to an electric signal input of a rotor assembly (12), and connecting a reference sensor (4) with a calibrator (5) through a slip ring (13);
1.2) a stator assembly (11) of a measured telemetering instrument is arranged on a fixed platform (1), a rotor assembly (12) is arranged at the lower end of a main shaft (2), the stator assembly (11) and the rotor assembly (12) are coaxially arranged, and a standard source (6) is connected to the electric signal input of the rotor assembly (12);
1.3) adjusting the main shaft (2) to move up and down through the lifting platform (8) so that the distance between the stator assembly (11) and the rotor assembly (12) meets the test requirement;
2) test of
The test comprises a static normal temperature test a, a static high temperature test b, a low rotating speed high temperature test c and a high rotating speed high temperature test d;
the static normal temperature test a specifically comprises the following steps:
a.1) giving an output temperature A of the reference source (6)0The standard source (6) inputs a corresponding thermoelectric potential signal to the rotor assembly (12) through the slip ring (13);
at the same time, the calibrator (5) reads the temperature B of the reference sensor (4)0℃；
a.2) powering on a tested telemetering instrument;
a.3) a circuit in the rotor component (12) amplifies the thermoelectric potential signal in the step a.1) and performs AD conversion to generate a digitized thermoelectric potential value E1 which is transmitted to the stator component (11), and the computer (10) acquires the thermoelectric potential value E2 output by the stator component (11) and obtains the corresponding temperature A1℃；
Meanwhile, the temperature measured by the measuring sensor (3) is transmitted to the stator component (11) through the rotor component (12), and the computer (10) reads the temperature B of the stator component (11)1℃；
a.4) comparison of temperatures A0DEG C and A1DEG C, and a temperature B0DEG C and B1DEG C, if A0DEG C and A1Difference of degree C, B0DEG C and B1If the difference values of the temperature are within the error allowable range, the reliability of the telemetering instrument is qualified under the static normal temperature; if not, the product is not qualified;
the static high-temperature test b specifically comprises the following steps:
b.1) construction of test conditions
Starting the heating module (9) to enable the temperature of a rotor assembly (12) in the heating module (9) to reach the test set high temperature;
b.2) giving an output temperature C of the reference source (6)0The standard source (6) inputs a corresponding thermoelectric potential signal to the rotor assembly (12) through the slip ring (13);
at the same time, the calibrator (5) reads the temperature D of the reference sensor (4)0℃；
b.3) powering on the tested telemetering instrument;
b.4) the circuit in the rotor component (12) amplifies the thermoelectric potential signal in the step b.2) and performs AD conversion to generate a digitized thermoelectric potential value E3, and the digitized thermoelectric potential value E3 is transmitted to the stator component (11) and is countedThe computer (10) collects the thermoelectric potential value E4 output by the stator assembly (11) and obtains the corresponding temperature C1℃；
Meanwhile, the temperature measured by the measuring sensor (3) is transmitted to the stator component (11) through the rotor component (12), and the computer (10) reads the temperature D of the stator component (11)1℃；
b.5) comparison of the temperatures C0DEG C and temperature C1DEG C, and a temperature D0DEG C and D1C, if C0DEG C and C1Difference of degree C, D0DEG C and D1If the difference values of the temperature are within the error allowable range, the reliability of the telemetering instrument is qualified under the static high temperature; if not, the product is not qualified;
the low-rotation-speed high-temperature test c specifically comprises the following steps:
c.1) construction of test conditions
Starting a rotating mechanism (7) to enable the rotating speed of the main shaft (2) to reach a set low rotating speed;
starting the heating module (9) to enable the temperature of a rotor assembly (12) in the heating module (9) to reach the test set high temperature;
c.2) giving an output temperature F of the reference source (6)0The standard source (6) inputs a corresponding thermoelectric potential signal to the rotor assembly (12) through the slip ring (13);
at the same time, the calibrator (5) reads the temperature G of the reference sensor (4)0℃；
c.3) powering on the tested telemetering instrument;
c.4) amplifying the thermoelectric potential signal in the step c.2) by a circuit in the rotor component (12) and performing AD conversion, generating a digitized thermoelectric potential value E5 and transmitting the value to the stator component (11), and acquiring the thermoelectric potential value E6 output by the stator component (11) by the computer (10) and obtaining the corresponding temperature F1℃；
Meanwhile, the temperature measured by the measuring sensor (3) is transmitted to the stator component (11) through the rotor component (12), and the computer (10) reads the temperature G of the stator component (11)1℃；
c.5) comparison of the temperatures F0DEG C and temperature F1DEG C, and a comparative temperature G0DEG C and G1DEG C, if F0DEG C and F1A difference of DEG C,G0DEG C and G1If the difference values of the temperature are within the error allowable range, the reliability of the telemetering instrument is qualified at low rotating speed and high temperature; if not, the product is not qualified;
the high-rotating-speed high-temperature test d specifically comprises the following steps:
d.1) construction of test conditions
Starting a rotating mechanism (7) to enable the rotating speed of the main shaft (2) to reach a set high rotating speed;
starting the heating module (9) to enable the temperature of a rotor assembly (12) in the heating module (9) to reach the test set high temperature;
d.2) setting an output temperature H of the reference source (6)0The standard source (6) inputs a corresponding thermoelectric potential signal to the rotor assembly (12) through the slip ring (13);
at the same time, the calibrator (5) reads the temperature I of the reference sensor (4)0℃；
d.3) powering on the tested telemetering instrument;
d.4) amplifying the thermoelectric potential signal in the step d.2) by a circuit in the rotor component (12) and performing AD conversion, generating a digitized thermoelectric potential value E7 and transmitting the value to the stator component (11), and acquiring the thermoelectric potential value E8 output by the stator component (11) by the computer (10) and obtaining the corresponding temperature H1℃；
Meanwhile, the temperature measured by the measuring sensor (3) is transmitted to the stator component (11) through the rotor component (12), and the computer (10) reads the temperature I of the stator component (11)1℃；
d.5) comparison of the temperatures H0DEG C and temperature H1DEG C, and temperature I0DEG C and I1DEG C, if H0DEG C and H1Difference of DEG C, I0DEG C and I1If the difference values of the DEG C are within the error allowable range, the reliability of the telemetering instrument is qualified under the conditions of high rotating speed and high temperature; if not, the product is not qualified;
3) telemetry instrument reliability determination
And the reliability of the telemetering instrument is qualified at a static normal temperature, a static high temperature, a low rotating speed high temperature and a high rotating speed high temperature, and the reliability of the telemetering instrument to be tested is qualified.
9. The test method for the reliability of engine telemetry instrumentation according to claim 8, characterized in that step 1.1) is preceded by a further step of verification of the measurement sensor (3) and the reference sensor (4):
the standard heat source gives a temperature to the main shaft (2), and the calibration sensor (14) measures the temperature M of the main shaft (2)0Simultaneously, the calibrator (5) respectively obtains the temperature M of the measuring sensor (3)1The temperature M of the reference sensor (4) and the DEG C2DEG C, comparative temperature M1℃、M2DEG C and M0If the temperature is consistent with the temperature, executing the step 1.1), if not, replacing the temperature with M0A measuring sensor (3) and a reference sensor (4) which are inconsistent at the temperature.
CN202111273154.4A 2021-10-29 2021-10-29 Test system and method for reliability of engine telemetering instrument Pending CN114034488A (en)

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CN202111273154.4A CN114034488A (en) 2021-10-29 2021-10-29 Test system and method for reliability of engine telemetering instrument

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