CN105606327A - Thermal fatigue testing machine for metal corrugated pipe of automobile exhaust system - Google Patents
Thermal fatigue testing machine for metal corrugated pipe of automobile exhaust system Download PDFInfo
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- CN105606327A CN105606327A CN201510951360.4A CN201510951360A CN105606327A CN 105606327 A CN105606327 A CN 105606327A CN 201510951360 A CN201510951360 A CN 201510951360A CN 105606327 A CN105606327 A CN 105606327A
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- bellows
- thermal fatigue
- testing machine
- observing
- electric
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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
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/06—Multidirectional test stands
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- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a thermal fatigue testing machine for a metal corrugated pipe of an automobile exhaust system and belongs to the automobile part performance testing field. The testing machine is composed of two major modules, namely, a mechanical structure module and an electric control system module, wherein the mechanical structure module includes a driving part, a transmission mechanism and a clamping mechanism, and the electric control system module includes a measurement and control interface, an industrial personal computer and an electric motor controller. When the testing machine works, a user can set the movement direction and frequency of the corrugated pipe through the measurement and control interface; the industrial personal computer outputs a control command to the driving system, so that the thermal fatigue testing machine can be controlled to perform a thermal fatigue test according to an operating condition set by the measurement and control interface; the industrial personal computer acquires actual movement state parameters of the thermal fatigue test; and the actual movement state parameters are displayed on the measurement and control interface. With the thermal fatigue testing machine of the invention adopted, the radial and axial independent and combined movement of the metal corrugated pipe of the automobile exhaust system can be realized, and the real automobile operating state of the corrugated pipe can be simulated.
Description
Technical field
The present invention relates to a kind of thermal fatigue tester that is applied to automobile exhaust system metal bellows, more particularly, it relate to a kind of realize automobile exhaust system metal bellows radially, axial independence and the thermal fatigue tester of aggregate motion.
Background technology
Metal bellows connects the cold and hot two ends of automobile exhaust system, gas extraction system be can effectively reduce and the vibration and the impact that cause or transmit from engine, vehicle body and ground etc. are subject to, reduce engine and the gas extraction system of gas extraction system relative displacement initiation and even the vibration of car load, in automobile exhaust system vibration damping, noise reduction, play an important role. Automobile is the object moving under severe a, changeable environment and load, automobile exhaust system is in especially a high temperature, high humidity, strong vibration, has burn into be subject in the exceedingly odious environment of air blast impact, metal bellows, in the time that this uses, also seems particularly important its service life.
In vehicle traveling process, bellows is subject to the impact of pavement behavior, engine luggine, automobile acceleration and deceleration etc., and its direction of vibration exists radial and axial independence and aggregate motion, and frequency and the amplitude of vibration also change. Mostly the vibration frequency of existing bellows thermal fatigue test mechanism and amplitude are to fix, can not truly reflect the motion conditions of bellows in car running process, need to redesign cam or eccentric shaft mechanism if change bellows motion amplitude, increase design cost and test period. Therefore,, in order to simulate the real vehicle motion conditions of bellows, need to design a kind of thermal fatigue test mechanism that can regulate easily bellows vibration frequency and amplitude.
Summary of the invention
In the problem existing for prior art, the invention provides a kind of amplitude, frequency is adjustable, can realize the testing machine of automobile exhaust system metal bellows two-freedom heat fatigue test, the real vehicle operating condition of real simulation bellows.
For solving the problems of the technologies described above, the present invention adopts following organization plan to be achieved: a kind of thermal fatigue tester for automobile exhaust system metal bellows, frequency and the amplitude that can conveniently regulate bellows to vibrate, real simulation bellows real vehicle vibration operating mode. This testing machine is made up of frame for movement and the large module of electric-control system two, and wherein, frame for movement module comprises drive part, transmission mechanism and three parts of clamp mechanism. Electric-control system module comprises observing and controlling interface, industrial computer, electric machine controller. When testing machine work, user is by the direction of motion and the frequency of observing and controlling interface setting bellows, and export control command to drive system by industrial computer, control thermal fatigue tester and carry out thermal fatigue test according to the operating condition of observing and controlling interface setting, industrial computer gathers the actual motion state parameter of bellows thermal fatigue test, and shows at observing and controlling interface. This testing machine can realize automobile exhaust system metal bellows radially, axial independence and aggregate motion, the real vehicle operating condition of real simulation bellows.
The invention has the beneficial effects as follows:
The present invention is realizing automobile exhaust system metal bellows radially or in axially-movable, can also realize the aggregate motion of both direction. The present invention, by regulating the position of support, realizes the thermal fatigue test to different size bellows. The present invention passes through to control the rotating speed of motor, adjustable bellows vibration frequency range 0 ~ 20Hz, and the present invention is by regulating the centre-to-centre spacing of crank circle pin and crankwheel, adjustable movement amplitude range 0 ~ 30mm.
Brief description of the drawings
Fig. 1 is positive two survey views of the present invention.
Fig. 2 is top view of the present invention.
Fig. 3 is stiff end clamp mechanism schematic diagram of the present invention.
Fig. 4 is vibrating device structural representation of the present invention.
Fig. 5 is electric-control system schematic diagram.
Fig. 6 is workflow diagram of the present invention.
Detailed description of the invention
This testing machine is made up of frame for movement and the large module of electric-control system two, and wherein, frame for movement module comprises drive part, transmission mechanism and three parts of clamp mechanism. Electric-control system module comprises observing and controlling interface, industrial computer, electric machine controller. When testing machine work, user is by the direction of motion and the frequency of observing and controlling interface setting bellows, and export control command to drive system by industrial computer, control thermal fatigue tester and carry out thermal fatigue test according to the operating condition of observing and controlling interface setting, industrial computer gathers the actual motion state parameter of bellows thermal fatigue test, and shows at observing and controlling interface. This testing machine can realize automobile exhaust system metal bellows radially, axial independence and aggregate motion, the real vehicle operating condition of real simulation bellows.
Below in conjunction with accompanying drawing, the present invention is explained in detail:
Consult Fig. 1, the present invention adopts following scheme to realize: the frame for movement module of this device comprises drive part, transmission mechanism and three parts of clamp mechanism, wherein, drive part is realized by two motors, by the motion of two radial and axial both directions of Electric Machine Control metal bellows. this mechanism is realizing metal bellows radially or axially in self-movement, can also realize the aggregate motion of radial and axial both direction. overall structure connects: the clamp mechanism for one end (18) (19) (20) (22) of metal bellows is completely fixed, and clamp mechanism for the other end (14) (16) is fixed on vibrating mechanism. drive motors (2) (4) is fixed on below testing stand, drive respectively eccentric rotary mechanism (7) and (28) by shaft coupling, wherein, eccentric rotary mechanism (7) drives chute connecting rod (12) (15), support (13), clamp mechanism (14) (16) is done lengthwise movement under the constraint of polished rod (11) (24), realize the axially-movable of metal bellows tache motorice, eccentric rotary mechanism (28) drives chute connecting rod (26) polish rod support (10) (11) (24) to do transverse movement under the constraint of sliding support (5) (9), realize the radial motion of metal bellows (13) tache motorice.
Described clamp mechanism is to adopt V-block fixture, when bellows is installed, can automatically carry out centralized positioning, bellows is installed more reliable and more stable.
Described drive part is realized by two drive motors, by controlling the rotating speed of drive motors, realizes the adjusting to bellows one end vibration frequency.
Described eccentric rotary mechanism is the crankwheel that straight pin is housed, wherein crankwheel (7) (28) is provided with T-shaped groove, straight pin (8) (27) is to be fixed on the T-shaped groove of crankwheel (7) (28) with flange nut, by regulating the centre-to-centre spacing of crank circle pin (8) (27) and crankwheel (7) (28), realize the adjusting of and amplitude of radial vibration axial to bellows tache motorice.
Consult Fig. 2 and Fig. 3, the support (21) of bellows stiff end is fixed on testing stand (3) with fastening bolt, wherein testing stand (3) is provided with T-shaped groove, the position of described support (21) can be along the T-slot left and right adjusting of testing stand (3), the position, left and right while being convenient to regulate bellows to install. Support (23) is fixed on support (21) with fastening bolt, its medium-height trestle (21) is provided with rectangular channel, the position of described support (23) can be along the rectangular channel up-down adjustment on support (21), be convenient to regulate the upper-lower position of bellows, described support (23) is L-type, and is provided with rectangular channel. It is upper that V-block (22) is fixed on support (23) with fastening bolt, and its medium-height trestle (23) is provided with rectangular channel, and the position of V-block (22) can regulate before and after the rectangular channel on support (23), realizes the thermal fatigue test to different length bellows.
Consult Fig. 4, polished rod (10) (11) (24) (25) is fixedly connected with chute connecting rod (26), composition transverse movement support, and crank circle pin moves in the chute of chute connecting rod (26), realizes the transverse movement of metal bellows. Chute connecting rod (12) (15) is enclosed within on polished rod (11) (24), and can do lengthwise movement along polished rod, and crank circle pin moves in the chute of chute connecting rod (12), realizes the lengthwise movement of metal bellows.
Consult Fig. 5, electric-control system module comprises observing and controlling interface, industrial computer, electric machine controller, jointly forms bellows heat fatigue test platform with frame for movement module.
Observing and controlling interface is to carry out mutual medium between user and bellows thermal fatigue tester, be connected with industrial computer by Ethernet interface, user can be by the test parameters of observing and controlling interface setting automobile exhaust system metal bellows thermal fatigue test, be sent to industrial computer based on ICP/IP protocol, the sensor information of collection is uploaded to observing and controlling interface by industrial computer, shows in real time the thermal fatigue test state of bellows.
Industrial computer in bellows heat fatigue test platform adopts industrial computer, for setting up system control strategy, collecting sensor signal and processing supervisor. It provides abundant I/O device driver, real-time kernel, real-time monitor-interface, parameter testing and data recording function. Mainly comprise A/D interface, digital input interface, memory, xPCTarget real-time kernel, D/A interface, digital output interface and Ethernet interface. In order to improve the real-time simulation ability of system, industrial computer adopts Ethernet interface to realize and the communicating by letter of observing and controlling interface by ICP/IP protocol. Gather axial direction electric machine and the rotating speed of radial motor and the motion amplitude of bellows by A/D acquisition module, and the test parameters of the thermal fatigue test of inputting in conjunction with observing and controlling interface, control command exported to electric machine controller by D/A module and digital output interface.
Electric machine controller is connected with D/A interface and the digital output interface of industrial computer, according to the analog signal of industrial computer output and the duty of Digital Signals motor.
Consult Fig. 6, the working mechanism of this testing machine is: user inputs the test parameters of thermal fatigue test by observing and controlling interface, and is sent to industrial computer by Ethernet. The control command that industrial computer sends based on observing and controlling interface, by the rotating speed of target of D/A module outputting radial and axial drive motors, by the enable signal of digital output module outputting radial and axial drive motors. Electric machine controller according to industrial computer output radially, axially rotating speed of target and the enable signal of drive motors, regulating shaft is to rotating speed and the rotation direction of drive motors, radial drive motor, control bellows vertically and the radially motion of both direction, realize the real-time control to bellows motion state. The signals of rotational speed sensor of the radial and axial drive motors of testing machine, bellows radially and shaft position sensor signal, after pre-process circuit hardware filtering, be input to the A/D interface of industrial computer, real-time kernel in industrial computer converts analog signal to data signal, and then actual motion amplitude and the frequency of definite bellows, and the actual motion state of bellows is sent to observing and controlling interface, facilitate the thermal fatigue test state of user's real-time monitored automobile exhaust system metal bellows.
Claims (4)
1. the thermal fatigue tester for automobile exhaust system metal bellows, this testing machine is made up of frame for movement and the large module of electric-control system two, wherein, frame for movement module comprises drive part, transmission mechanism and clamp mechanism, electric-control system module comprises observing and controlling interface, industrial computer, electric machine controller, it is characterized in that: this testing machine can realize automobile exhaust system metal bellows radially, axial independence and aggregate motion, the real vehicle operating condition of real simulation bellows.
2. according to frame for movement module claimed in claim 1, it is characterized in that: the position of support (21) can be along the T-slot left and right adjusting of testing stand (3), the position of support (23) can be along the rectangular channel up-down adjustment on support (21), the position of clamp mechanism (18) (19) (20) (22) can regulate before and after the rectangular channel on support (23), realize the thermal fatigue test to different size bellows, electric machine controller is by controlling the rotating speed of drive motors, realize the adjusting to bellows tache motorice vibration frequency, by regulating the centre-to-centre spacing of crank circle pin and crankwheel, realize bellows tache motorice axially and the change of amplitude of radial vibration.
3. according to electric-control system module claimed in claim 1, it is characterized in that: electric-control system module comprises observing and controlling interface, industrial computer, electric machine controller, wherein observing and controlling interface is for input of control commands, and show the motion state of bellows, industrial computer is for gathering the actual motion state parameter of bellows thermal fatigue test, and show at observing and controlling interface, electric machine controller is for controlling the motion state of motor.
4. according to testing machine claimed in claim 1, it is characterized in that: industrial computer is the control command in the input of observing and controlling interface according to user, output control signal is to electric machine controller, regulating shaft is to rotating speed and the rotation direction of drive motors and radial drive motor, control bellows vertically and the radially motion of both direction, realize the real-time control to bellows motion state, industrial computer collection is also processed each sensor signal, send to observing and controlling interface to show, facilitate the thermal fatigue test state of user's real-time monitored bellows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510951360.4A CN105606327A (en) | 2015-12-17 | 2015-12-17 | Thermal fatigue testing machine for metal corrugated pipe of automobile exhaust system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510951360.4A CN105606327A (en) | 2015-12-17 | 2015-12-17 | Thermal fatigue testing machine for metal corrugated pipe of automobile exhaust system |
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| CN105606327A true CN105606327A (en) | 2016-05-25 |
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| CN201510951360.4A Pending CN105606327A (en) | 2015-12-17 | 2015-12-17 | Thermal fatigue testing machine for metal corrugated pipe of automobile exhaust system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2704037Y (en) * | 2004-06-09 | 2005-06-08 | 中国第一汽车集团公司 | Corrugated pipe and expansion joint axial and radical detection test bed |
| CN201083618Y (en) * | 2007-10-12 | 2008-07-09 | 沈阳仪表科学研究院 | Metal corrugated pipe swinging test device |
| CN102156030A (en) * | 2011-01-20 | 2011-08-17 | 航天晨光股份有限公司 | External-pressure fatigue test equipment for corrugated pipe |
| CN202631245U (en) * | 2012-06-28 | 2012-12-26 | 山东力诺新材料有限公司 | Corrugated pipe fatigue-testing machine testing device |
-
2015
- 2015-12-17 CN CN201510951360.4A patent/CN105606327A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2704037Y (en) * | 2004-06-09 | 2005-06-08 | 中国第一汽车集团公司 | Corrugated pipe and expansion joint axial and radical detection test bed |
| CN201083618Y (en) * | 2007-10-12 | 2008-07-09 | 沈阳仪表科学研究院 | Metal corrugated pipe swinging test device |
| CN102156030A (en) * | 2011-01-20 | 2011-08-17 | 航天晨光股份有限公司 | External-pressure fatigue test equipment for corrugated pipe |
| CN202631245U (en) * | 2012-06-28 | 2012-12-26 | 山东力诺新材料有限公司 | Corrugated pipe fatigue-testing machine testing device |
Non-Patent Citations (1)
| Title |
|---|
| 党瑞宁: "汽车排气系统振动特性测试研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
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Application publication date: 20160525 |