CN216483953U - Test system for reliability of engine telemetering instrument - Google Patents
Test system for reliability of engine telemetering instrument Download PDFInfo
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- CN216483953U CN216483953U CN202122639770.9U CN202122639770U CN216483953U CN 216483953 U CN216483953 U CN 216483953U CN 202122639770 U CN202122639770 U CN 202122639770U CN 216483953 U CN216483953 U CN 216483953U
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Abstract
The utility model provides a test system for the reliability of an engine telemeter, which solves the problem that a device for verifying and testing the reliability of a telemeter with multiple elements 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 part of the rotor assembly and the spindle, 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
Technical Field
The utility model 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 moving parts of an engine turbine, a wheel disc, a wheel shaft and the like under high-temperature and high-rotation environments is necessary test content for engine design verification. 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 working temperature in the aero-engine can reach 2000 ℃, although thermal barrier coating, airflow heat dissipation, heat insulation and heat dissipation and other modes are adopted, the temperature of a turbine shaft can still reach 300 ℃, and the temperature far exceeds 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.
SUMMERY OF THE UTILITY MODEL
The utility model provides a test system for the reliability of an engine telemetering instrument, which aims to solve the technical problems that the existing test system for multi-element reliability verification of the telemetering instrument does not exist, only basic function performance test 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 utility model 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.
Compared with the prior art, the utility model 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 utility model 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 utility model 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 utility model 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 mounted at one end of a turbine shaft of an engine and is connected to a sensor (such as a thermocouple, a strain gauge, etc.) 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 utility model 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; installing a stator assembly 11 on a fixed platform 1, connecting a power supply and a computer 10 through a signal wire, and adjusting the stator assembly 11 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 voltage signal to the rotor assembly 12 through a slip ring 13;
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 12 and performing AD conversion to generate a digital thermoelectric potential value E3, transmitting the value to the stator component 11, acquiring the thermoelectric potential value E4 output by the stator component 11 by the computer 10, 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) 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 two is within the allowable error range, the telemetering instrument can be used at a static high temperatureThe reliability is qualified; 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) powering on the telemetering 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 digital thermoelectric potential value E7, transmitting the value to the stator assembly 11, collecting 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) 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.
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 140The calibrator 5 obtains measurement sensors at the same timeTemperature M of vessel 31DEG 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 a 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.
The test system can also adopt the following steps in the test process of the reliability of the engine telemeter, and 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) 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;
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 assembly 12 amplifies the thermoelectric potential signal in the step a.1) and performs AD conversion to generate a digitized thermoelectric potential value E1, the digitized thermoelectric potential value E1 is transmitted to the stator assembly 11, the computer 10 acquires the thermoelectric potential value E2 output by the stator assembly 11, 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) given standard Source 6 oneAn output temperature C0The 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 measured 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 value to the stator assembly 11, and acquiring the thermoelectric power output by the stator assembly 11 by the computer 10Potential value E6 and 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 H0The 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 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 I1The difference of the DEG C is within the allowable error range, thenThe reliability of the remote measuring instrument is qualified under 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 M0If the temperature is consistent with the temperature M, executing the next step, namely step 1.1), if not, replacing an unqualified sensor which is the same as 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 (5)
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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122639770.9U CN216483953U (en) | 2021-10-29 | 2021-10-29 | Test system for reliability of engine telemetering instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122639770.9U CN216483953U (en) | 2021-10-29 | 2021-10-29 | Test system for reliability of engine telemetering instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216483953U true CN216483953U (en) | 2022-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122639770.9U Active CN216483953U (en) | 2021-10-29 | 2021-10-29 | Test system for reliability of engine telemetering instrument |
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| Country | Link |
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| CN (1) | CN216483953U (en) |
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2021
- 2021-10-29 CN CN202122639770.9U patent/CN216483953U/en active Active
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