CN110849631A - Engine spindle rotation damping testing device - Google Patents

Engine spindle rotation damping testing device Download PDF

Info

Publication number
CN110849631A
CN110849631A CN201911140078.2A CN201911140078A CN110849631A CN 110849631 A CN110849631 A CN 110849631A CN 201911140078 A CN201911140078 A CN 201911140078A CN 110849631 A CN110849631 A CN 110849631A
Authority
CN
China
Prior art keywords
engine
damping
rotating speed
sensor
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911140078.2A
Other languages
Chinese (zh)
Inventor
王鹏
张应�
许韫韬
吕志刚
李晓艳
黄宝洋
李良杰
张炜尧
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xian Technological University
Original Assignee
Xian Technological University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xian Technological University filed Critical Xian Technological University
Priority to CN201911140078.2A priority Critical patent/CN110849631A/en
Publication of CN110849631A publication Critical patent/CN110849631A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00Testing of engines
    • G01M15/14Testing gas-turbine engines or jet-propulsion engines
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/0028Force sensors associated with force applying means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00Testing of engines
    • G01M15/02Details or accessories of testing apparatus

Abstract

The invention relates to the technical field of intelligent manufacturing and detection of an aviation turbojet engine, in particular to a device for testing the rotational damping of a main shaft of an engine. The device tests the rotational damping of the engine to evaluate the damping characteristic of the rotor system in the engine, ensures the safety of the engine test run, and provides a guidance basis for binding the working condition parameters of the engine. The technical scheme of the invention is as follows: the STM32 series is adopted as a main control chip, and the main control chip mainly comprises a motor driving module, a current collecting module, a rotating speed detecting module, a display module and other functional modules, and provides guarantee for the subsequent flying test research and development of the engine through the rotation damping test of the main shaft of the engine.

Description

Engine spindle rotation damping testing device
Technical Field
The invention relates to the technical field of intelligent manufacturing and detection of an aviation turbojet engine, in particular to a device for testing the rotational damping of a main shaft of an engine.
Background
The safety detection of the rotor system of the micro turbojet engine is an indispensable part in the aspect of engine safety detection, because the operation state of the rotor system directly influences the operation state and the service life of the engine as a core component of the micro turbojet engine.
In reality, due to the influence of factors such as manufacturing errors and assembly errors, the rotor is unbalanced, and the rotation damping of the main shaft is generated, so that the rotor is an important index for detecting whether the rotation state of an engine rotor system is good or not, and is also a performance index influencing the whole test run process of engine starting-normal operation-stopping.
At the present stage, the damping test in China also depends on manual experience judgment, and because the quality of the damping of the main shaft rotor system of the engine is completely determined by the manufacturing and the process of parts, the process difference of the parts in China is large, the assembly workers have uneven skills, and the starting is late and the foreign technology is blocked, the performance index of the micro turbojet engine in China is low, so that the measurement of the rotary damping is necessary to ensure the normal operation of the rotor system.
Disclosure of Invention
In view of this, the present invention provides a device for testing rotational damping of a main shaft of an engine. The static and dynamic damping values of the engine are calculated by detecting the rotating speed and the current value of the engine by utilizing technologies such as an intelligent detection sensor, an intelligent damping algorithm, big data and the like, and the proper rotational damping of the main shaft in a cold state (after the engine is assembled off line and before a hot vehicle ignition test is carried out) is ensured, so that the working state of a turbojet engine rotor system is ensured to be good, and accidents are avoided during test run.
In order to solve the problems in the prior art, the technical scheme of the invention is as follows: the utility model provides an engine main shaft rotational damping testing arrangement which characterized in that: the intelligent control system comprises a microcontroller, wherein a UCOSII real-time operating system is arranged in the microcontroller and used as a main control platform for controlling a sensor assembly, a motor driving module and a display module;
the sensor assembly comprises a current sensor and a rotating speed sensor;
the current sensor is a Hall bipolar current sensor and is used for collecting the current value for starting the engine, calculating the static and dynamic damping values of the rotating shaft of the engine by using a damping test algorithm, calculating the damping parameter value of the engine by a damping calculation formula according to the obtained static and dynamic damping values, and displaying the damping parameter value on an LCD display screen by a display module;
the rotating speed sensor is a linear Hall sensor, the collected rotating speed signal is processed through the signal conditioning circuit to obtain the actual rotating speed value of the motor, and the actual rotating speed value is displayed on the LCD display screen through the display module;
the motor driving module adopts an H-bridge type direct current motor driving chip as a driving circuit of the starting motor, the starting, stopping and speed regulation of the motor are controlled by the motor driving module through the main control platform, the starting motor is started to rotate, a main shaft of the engine is driven to operate, and the operating parameters of the engine are monitored in real time by adopting corresponding sensor components in the operation process.
Further, the microcontroller is model number STM32F 407.
Further, the display is a display carried by the microcontroller.
Compared with the prior art, the invention has the following advantages:
1. on the basis of the existing engine cold running detection technology, the collected working condition information of the engine is comprehensively processed and intelligently identified by using technologies such as an intelligent detection sensor, an algorithm, big data and the like, the rotational damping of the engine is calculated to evaluate the damping characteristic of a rotor system in the engine, the test run safety of the engine is ensured, and a guide basis is provided for binding working condition parameters of the engine;
2. the invention can visually display the rotation damping characteristic of the engine: the damping value of the engine is calculated by collecting the current of the starting motor engine in unit time and the rotating speed of the main shaft of the engine, and the damping parameters of the engine are visually displayed through an LCD.
3. The device is simple to operate, and the cost of the engine in the cold vehicle test stage is reduced; the engine rotor system damping can be directly tested at the stage before the ignition and starting of the engine by directly mounting the engine on the engine, and field technicians can conveniently judge the internal friction of the engine through the display of an LCD (liquid crystal display);
4. the invention enables the modules to achieve high-efficiency coordination work through a reasonable system architecture, and the cost is reduced through circuit design.
Description of the drawings:
FIG. 1 is a schematic mechanical diagram of the apparatus of the present invention;
FIG. 2 is a block diagram of an overall implementation of the apparatus of the present invention;
FIG. 3 is a functional block diagram of the general module of an engine damping test routine;
FIG. 4 is a block diagram of an engine damping measurement flow;
description of the labeling: 1: a coupling; 2: a motor; 3: a rigid support structure; 4: a bearing; 5: an engine main shaft; 6: a Hall linear sensor assembly; 7: a small magnet; 8: a slider; 9: a track base.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention tests the engine rotation damping through the device to evaluate the damping characteristic of the rotor system in the engine, ensures the safety of the engine test run, and provides a guiding basis for binding the working condition parameters of the engine.
The invention provides an engine spindle rotation damping testing device which comprises a microcontroller, wherein a UCOSII real-time operating system is arranged in the microcontroller as a main control platform, the microcontroller is an STM32F407 in an STM32F4xx series, and the microcontroller is respectively connected with a sensor assembly, a motor driving module and a display module;
the sensor assembly comprises a current sensor and a rotating speed sensor;
the current sensor adopts a Hall bipolar current sensor as a current acquisition chip in the running process of the engine, and calculates static and dynamic damping values of a rotating shaft of the engine by using a damping test algorithm according to the acquired current value for starting the engine, so as to obtain a static friction value of the engine and evaluate the rotating damping parameter state of the engine; the rotating speed sensor adopts a linear Hall sensor, and then the collected rotating speed signal is processed by a signal conditioning circuit to obtain the actual rotating speed value of the motor;
the motor driving module adopts an H-bridge type direct current motor driving chip as a driving circuit of the starting motor, the motor driving module is controlled by a master controller according to requirements, the starting motor is started to drive the main shaft of the engine to start, and in the process, the corresponding sensor assembly is used for monitoring the running parameters of the engine in real time.
The display module adopts a liquid crystal display screen of the main control STM32F4, the main control chip carries out data processing on the rotating speed value and the running current value of the engine acquired by the sensor, the damping parameter value of the engine is calculated through a damping calculation formula according to the tested static and dynamic damping values, and the damping parameter value is displayed on the LCD display screen.
The mechanical structure diagram of the invention is shown in figure 1, the system supports a simulation engine main shaft 5 and a motor 2 through a rigid supporting structure 3, and simultaneously fixes the engine main shaft 5 on a sliding block 8 by using a bearing 4, so that the engine is ensured to deviate from the position due to reverse thrust during the cranking.
In the system operation stage, the coupler 1 is driven through the starting motor 2 to rotate, so that the main shaft 5 of the simulated engine is driven to rotate, the change of a magnetic field is detected through a plurality of groups of small magnets 7 loaded on the engine, so that the operation parameter value of the engine is obtained, and the damping coefficient of the rotor in the engine is obtained through the change of the parameter and a damping conversion formula.
As shown in figure 2, the invention adopts STM32F407 microcontroller as control core, by transplanting UCOSII real-time operating system on the system, the drive circuit constructed by TB6612FNG drive module is combined with key system to drive and control start-stop and speed regulation of the starting motor, the rotating speed and current value of the engine in unit time are collected by current sensor ACS712 and Hall rotating speed sensor, the maximum value of static damping is equivalent to the maximum static friction force according to the damping characteristic, and then according to the energy conservation law, as long as the electromagnetic force of the starting motor at the moment of starting is measured, the maximum static damping can be obtained. After the rotating speed of the simulation object is gradually increased under the driving of the starting motor, the rotating speed of the simulation object can be measured by the Hall element amplifying circuit. The rotating speed of the simulation object is stabilized at a rated starting rotating speed (5000 r/min) through a PID control module, namely the simulation object enters a self-sustaining running state. The main control stops starting the motor through the driving circuit, calculates the damping coefficient and the dynamic damping mean value according to the quality factor method and the viscous damping model, displays the damping value through an LCD in real time, and field technicians judge the running performance of the engine through the internal damping value of the engine and provide a guide basis for binding working condition parameters of the engine.
As shown in fig. 3, the engine damping test program has a functional block diagram of an overall module, and the start, stop and speed change of the motor are controlled by combining motor drive and a key; AD conversion of current analog data and calculation of static damping, and displaying the data on an LCD display screen; counting the pulses of the Hall speed measurement module, converting the pulses into rotating speed and dynamic damping, and displaying data on a display screen; the rotating speed of a motor of the PID control module is constant at 5000 rpm; and finally, integrating the modules by using the UCOSII system transplanted on the STM32F407, and then completing the scheduling and distribution of the whole system.
As shown in fig. 4, after the system is initialized, the driving module drives the starter motor to start and drive the main shaft of the engine to rotate, the hall rotation speed sensor detects the magnetic pole of the engine and obtains the rotation speed value of the engine in unit time through AD conversion, so as to judge whether the main shaft of the engine normally starts, the current sensor detects the current value of the engine at the moment, the static damping value of the engine is obtained through the damping characteristic and the damping conversion formula, the main control chip starts the engine to stop rotating through the driving circuit, the rotation speed sensor detects whether the rotation speed of the main shaft of the engine reaches 5000rpm and maintains the rotation speed, and the desired dynamic damping value is obtained through the average value of the rotation speed in unit time.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and it should be noted that those skilled in the art should make modifications and variations without departing from the principle of the present invention.

Claims (3)

1. The utility model provides an engine main shaft rotational damping testing arrangement which characterized in that: the intelligent control system comprises a microcontroller, wherein a UCOSII real-time operating system is arranged in the microcontroller and used as a main control platform for controlling a sensor assembly, a motor driving module and a display module;
the sensor assembly comprises a current sensor and a rotating speed sensor;
the current sensor is a Hall bipolar current sensor and is used for collecting the current value for starting the engine, calculating the static and dynamic damping values of the rotating shaft of the engine by using a damping test algorithm, calculating the damping parameter value of the engine by a damping calculation formula according to the obtained static and dynamic damping values, and displaying the damping parameter value on an LCD display screen by a display module;
the rotating speed sensor is a linear Hall sensor, the collected rotating speed signal is processed through the signal conditioning circuit to obtain the actual rotating speed value of the motor, and the actual rotating speed value is displayed on the LCD display screen through the display module;
the motor driving module adopts an H-bridge type direct current motor driving chip as a driving circuit of the starting motor, the starting, stopping and speed regulation of the motor are controlled by the motor driving module through the main control platform, the starting motor is started to rotate, a main shaft of the engine is driven to operate, and the operating parameters of the engine are monitored in real time by adopting corresponding sensor components in the operation process.
2. The engine spindle rotational damping test device of claim 1, wherein: the type of the microcontroller is STM32F 407.
3. The engine spindle rotational damping test device of claim 1 or 2, wherein: the display is a display carried by the microcontroller.
CN201911140078.2A 2019-11-20 2019-11-20 Engine spindle rotation damping testing device Pending CN110849631A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911140078.2A CN110849631A (en) 2019-11-20 2019-11-20 Engine spindle rotation damping testing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911140078.2A CN110849631A (en) 2019-11-20 2019-11-20 Engine spindle rotation damping testing device

Publications (1)

Publication Number Publication Date
CN110849631A true CN110849631A (en) 2020-02-28

Family

ID=69603027

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911140078.2A Pending CN110849631A (en) 2019-11-20 2019-11-20 Engine spindle rotation damping testing device

Country Status (1)

Country Link
CN (1) CN110849631A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201285334Y (en) * 2008-10-30 2009-08-05 洛阳轴研科技股份有限公司 Measurement instrument for detecting dynamic friction torque of bearing
CN101907557A (en) * 2010-07-30 2010-12-08 北京宇航系统工程研究所 System for accurately testing friction damping
CN106342205B (en) * 2010-08-31 2013-12-11 中国兵器工业集团第七○研究所 Engine start moment of resistance method of testing
CN103674363A (en) * 2012-09-18 2014-03-26 重庆长安汽车股份有限公司 Test system for low-temperature starting resisting moment of engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201285334Y (en) * 2008-10-30 2009-08-05 洛阳轴研科技股份有限公司 Measurement instrument for detecting dynamic friction torque of bearing
CN101907557A (en) * 2010-07-30 2010-12-08 北京宇航系统工程研究所 System for accurately testing friction damping
CN106342205B (en) * 2010-08-31 2013-12-11 中国兵器工业集团第七○研究所 Engine start moment of resistance method of testing
CN103674363A (en) * 2012-09-18 2014-03-26 重庆长安汽车股份有限公司 Test system for low-temperature starting resisting moment of engine

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
曹志义 等: "基于模型的发动机起动阻力矩测试", 《车用发动机》 *
王忠 等: "柴油机冷起动阻力矩试验研究", 《车用发动机》 *

Similar Documents

Publication Publication Date Title
CN102129035B (en) Comprehensive test device and test method for automobile starter
CN105403832B (en) A kind of stepper motor comprehensive performance testing system
CN202339399U (en) Motor testing system
CN101930054B (en) Portable motor parameter-detecting device
CN109470470A (en) One kind carrying out gearbox mechanical efficiency test macro and test method on vehicle
CN1940519A (en) Endurance performance testing method for starter
CN110849631A (en) Engine spindle rotation damping testing device
CN103512844A (en) Nonsmooth surface fluid friction resistance testing device and nonsmooth surface anti-drag effect evaluating method
CN204758298U (en) Engine test bed
CN202794484U (en) Magnetic flux detection device of stator
CN207976563U (en) A kind of AC servo motor opening machine system test device of turntable switching load
CN2760571Y (en) Magnetor stator testing device
CN105372537A (en) Labview/PDA-based frequency converter intelligent test platform
CN205301352U (en) Speed meter for hall sensor
CN112254626B (en) Angular velocity fluctuation self-checking method for door machine motor rotor position sensor
CN105334031B (en) A kind of test method of dual drive electro spindle
CN104792535A (en) Comprehensive performance testing system based on engine power testing
CN102353902B (en) Equivalent test device and method for motor
CN104236901B (en) A kind of wheel hub motor assembly durability test method based on EMT
CN202757778U (en) Testing device for starting drive time of engine
CN203479258U (en) End surface round run-out testing device for automobile air-conditioner clutch
CN202956477U (en) Testing device of motor automatic turntable
CN105137345A (en) UK oil pressure protection relay test stand
CN110568356A (en) Automobile starter endurance test device and method
CN106404404B (en) Device for testing rotating speed and its test method under a kind of aero-engine operating status

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20200228

WD01 Invention patent application deemed withdrawn after publication