CN101281075A - Large-sized power plant mass inertia characteristic parameters measuring and taking synthetic experimental bench - Google Patents
Large-sized power plant mass inertia characteristic parameters measuring and taking synthetic experimental bench Download PDFInfo
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- CN101281075A CN101281075A CNA200810053278XA CN200810053278A CN101281075A CN 101281075 A CN101281075 A CN 101281075A CN A200810053278X A CNA200810053278X A CN A200810053278XA CN 200810053278 A CN200810053278 A CN 200810053278A CN 101281075 A CN101281075 A CN 101281075A
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Abstract
The present invention discloses a test bed used for measuring the mass inertia characteristic parameter of large power equipment. The bracket is lifted together with the level rotary table through three wire ropes; three level trimmers and three tension sensors are respectively fixed on the three wire ropes. The small open at the outer edge of the rotary table is installed with photoelectric sensor; the three tension sensors and the output signal end of the photoelectric sensor are both connected with the computer through the interface plate. The rotary table level is adjusted and the centroid of the object to be tested is aligned by using the three tension sensors; the period of the level rotary table for swinging is measured by the photoelectric sensor. The object to be tested is placed on the level rotary table; the testing plane is three-dimensional coordinate plane of the object to be tested. The present invention uses pivot reaction method and moment balance theory to quickly obtain the centroid of complicated object, uses three-wire swinging method to measure the torsion vibration period to obtain rotary rotational inertia. The quality parameter and inertial parameter are once finished on the same bench; the operation is convenient. The measurement of all the large engines and power assemblies for vehicle in the domestic is basically finished.
Description
Technical field
The basic parameter that the invention belongs to power-equipment vibration control field measures device.
Background technology
Along with the speed of automobile develops to the lightweight direction to the weight of high speed, vehicle body, the vibration noise problem becomes increasingly conspicuous, and people are to the also more and more strictness of requirement of vibration and noise.The ride comfort of running car, riding comfort more and more are subjected to people's attention.It is particularly important that the vibration damping of power assembly and vibration isolation seem, the appropriate design power assembly suspension system, not only can improve the comfortableness that automobile is taken, can also prolong the serviceable life of engine and other parts, be to solve the most effectively way of internal combustion engine complete machine oscillation.Power assembly mass parameter and inertial parameter are all significant for power assembly suspension system dynamic analysis and the vibration isolation that suspends design thereof.Be that reasonable Arrangement engine mounting pattern is to reduce the important evidence parameter of engine to the vibration input of car body.The method precision that measures about " quality---inertial properties " parameter is lower at present; And be difficult to penetration and promotion, especially bigger for quality, the large-sized power plant of complex contour is difficult to operation.For this reason, the present invention has designed quality---inertial properties parametric synthesis experiment table, this experiment table can realize that measuring simultaneously of mass parameter and inertial parameter finish, for quality above 500 kilograms, physical dimension surpasses 1.5 meters large-sized power plant, shows advantage more.
Summary of the invention
The purpose of this invention is to provide a kind of comprehensive experiment table that is applicable to large-sized power plant " quality---inertia " characteristic parameters measuring and taking.
Below in conjunction with accompanying drawing 1-2 structural principle of the present invention is described.Large-sized power plant mass inertia characterisitic parameter comprehensive experiment table has support 1, wire rope 2, WidFin device 3, rotating disk 4, pulling force sensor 5, photoelectric sensor 6, interface board 7, computing machine 8 etc.Forming structure and concrete connected mode is: support 1 is lifted on by three wire rope 2 with horizontal rotating disc 4, three WidFin devices 3 and three pulling force sensors 5 are individually fixed on three wire rope, rotating disk 4 outward flanges have been cut osculum, and photoelectric sensor 6 is installed at the osculum place.The output signal end of three pulling force sensors 5 and photoelectric sensor 6 all links to each other with computing machine 8 by interface board 7.Interface board comprises A/D converter, filter amplifier etc.With the pulling force of three pulling force sensors 5 as the standard of adjusting rotating disk 4 levels and aiming at the barycenter of determinand 9; Measure the cycle that horizontal rotating disc rocks by photoelectric sensor 6.Object under test 9 places on the horizontal rotating disc 4, and test surfaces is the three-dimensional coordinate face of object under test.
In conjunction with the accompanying drawings 3 and 4 pairs of test philosophies of the present invention of accompanying drawing describe, at first adjust the level of rotating disks by WidFin device 3, be standard with three pulling force sensor 5 readings when identical.On rotating disk 4, set up coordinate system as Fig. 3, true origin is positioned at circle centre position.Because the testee complex contour, be fixed in the regular rectangular shape frame, do as a wholely, the testee level is placed on the rotating disk, the lower surface geometric center overlaps with true origin, and geometric center lines is alignd with coordinate axis.At this moment, gather the reading of pulling force sensor 5.According to the position of its reading and three suspension centres, just can obtain quality and barycenter two projection coordinates in this plane by calculating.After finishing this plane center-of-mass coordinate measurement, to move object its barycenter projection is overlapped with true origin, standard is that three pulling force sensor 5 readings are identical.Reverse low-angle of rotating disk then, allow rotating disk 4 freely rock vibration, measure by photoelectric sensor 6 and rock period T, just can calculate its moment of inertia Iz with respect to the Z axle.After finishing the measurement of this face, successively object is turned in two planes vertical with existing plane, repeats said process, like this, three coordinate figures of barycenter all have been repeated once, take the mean.Walking around the moment of inertia of three coordinate axis of barycenter also all tries to achieve.Calculate the flow chart of data processing such as the accompanying drawing 5 of barycenter and moment of inertia.
Description of drawings
Accompanying drawing 1 is system architecture sketch of the present invention.
Accompanying drawing 2 is the installation sketch of photoelectric sensor of the present invention and rotating disk.
Determinand was put synoptic diagram when accompanying drawing 3 was tested for the present invention.
Accompanying drawing 4 measures the principle key diagram for barycenter of the present invention.
F1, F2, F3 are respectively the pulling force that three pulling force sensors bear among the figure; L1 and L3 are the distances of three suspension centres and coordinate system x axle, L2 be wherein two suspension centres apart from the distance of coordinate system y axle.
Accompanying drawing 5 is the data processing calculation flow chart.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing and by specific embodiment.This experiment table comprises that stand, acquisition system and computer data computing three parts constitute.Present embodiment: support 1 is high 4.5 meters, 2 tons of load-bearing of design, and at its top, it is on 1.8 meters the circle that three short strutbeams become 120 ° of even circumscribed diameters that are distributed in.1.8 meters of rotating disk 4 diameters.By three wire rope three WidFin devices, three pulling force sensors and support are connected together.And the wiring of pressing installation photoelectric sensor 6 shown in Figure 1, interface board 7 and computing machine 8.
Before testing, at first adjust the rotating disk level, be all standard mutually with three pulling force sensor readings; Then testee is lain in (as Fig. 3) on the rotating disk, lay at present the surface geometry center and align with initial point, geometric center lines is alignd with coordinate axis.Gather the reading of three pulling force sensors this moment, according to the position of value of thrust and three point of suspension of rotating disk, just can obtain two coordinates of quality and barycenter by calculation procedure.After obtaining two center-of-mass coordinates on this plane, adjust determinand, its barycenter projection is overlapped with center of turntable, be all standard mutually with the pulling force sensor reading equally; Then rotating disk is reversed a minute angle and make its torsional oscillation, measure it by photoelectric sensor and rock the cycle.Experiment table pendulum rope length and disk diameter all are definite value, and after obtaining these data, calculation procedure just can calculate object about walking around the moment of inertia of barycenter Z-axis.Then object is turned in two other orthogonal plane, repeats said process, three coordinate figures of barycenter have all obtained twice, get its mean value.Three moment of inertia walking around the center-of-mass coordinate axle also all record.Remove fixing composition then, just obtained quality---the inertial properties parameter of complicated shape power-equipment with the regular rectangular shape frame.
The beneficial effect of this test macro is: utilize reaction of supports method and principle of moment balance to obtain rapidly complex object matter The heart utilizes the three-line pendulum method to measure the torsional oscillation cycle and obtains rotary inertia. Mass parameter and inertial parameter on same stand once Finish, easy to operate. Utilize pulling force sensor adjustment level and aim at barycenter, utilize photoelectric sensor measure the cycle of rocking, Utilize software for calculation result of calculation, improved certainty of measurement, simplified measuring process. The experimental bench design capacity is big, and is basic Can finish the measurement of domestic all large-scale vehicular engines and power assembly.
Claims (2)
1. large-sized power plant mass inertia characterisitic parameter comprehensive experiment table, has support, wire rope, the WidFin device, rotating disk, pulling force sensor, photoelectric sensor, interface board, computing machine, it is characterized in that support (1) is lifted on by three wire rope (2) with horizontal rotating disc (4), three WidFin devices (3) and three pulling force sensors (5) are individually fixed on three wire rope, rotating disk (4) outward flange has been cut osculum, at the osculum place photoelectric sensor (6) is installed, the output signal end of three pulling force sensors (5) and photoelectric sensor (6) all links to each other with computing machine (8) by interface board (7).
2. according to the described large-sized power plant mass inertia characterisitic parameter of claim 1 comprehensive experiment table, it is characterized in that pulling force with described three pulling force sensors (5) is as the standard of adjusting rotating disk (4) level and aiming at the barycenter of determinand (9); Measure the cycle that horizontal rotating disc rocks by described photoelectric sensor (6); Object under test (9) places on the horizontal rotating disc (4), and test surfaces is the three-dimensional coordinate face of object under test.
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| CNA200810053278XA CN101281075A (en) | 2008-05-28 | 2008-05-28 | Large-sized power plant mass inertia characteristic parameters measuring and taking synthetic experimental bench |
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| CNA200810053278XA CN101281075A (en) | 2008-05-28 | 2008-05-28 | Large-sized power plant mass inertia characteristic parameters measuring and taking synthetic experimental bench |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915638A (en) * | 2010-07-26 | 2010-12-15 | 重庆大学 | Measuring device and method of all-inertial parameter of rigid body |
| CN102393277A (en) * | 2011-11-22 | 2012-03-28 | 天津大学 | Measuring apparatus of rotational inertia of object and method thereof |
| CN102494845A (en) * | 2011-11-22 | 2012-06-13 | 天津大学 | Device and method for measuring inertia product of object |
| CN102507091A (en) * | 2011-11-22 | 2012-06-20 | 天津大学 | Object mass center measuring device and method |
| CN103162903A (en) * | 2013-02-25 | 2013-06-19 | 北京科技大学 | Initiative balanced three-wire torsional pendulum principle rigid body dynamics parameter testing platform |
| CN103969002A (en) * | 2013-02-06 | 2014-08-06 | 广州汽车集团股份有限公司 | Object centroid testing method |
| CN105092153A (en) * | 2014-05-13 | 2015-11-25 | 天津航天瑞莱科技有限公司 | High-precision large-scale structural component centroid measurement system and method |
| CN104296924B (en) * | 2014-11-04 | 2017-10-10 | 广西大学 | Power assembly inertial parameter method of testing |
| CN110174206A (en) * | 2019-04-26 | 2019-08-27 | 交通运输部天津水运工程科学研究所 | A kind of three-dimensional total power measuring device and measuring method of experiment |
| CN110530572A (en) * | 2018-05-24 | 2019-12-03 | 上汽通用五菱汽车股份有限公司 | A kind of arrangements for automotive doors center mass measuring device |
| CN110702310A (en) * | 2019-11-13 | 2020-01-17 | 中国第一汽车股份有限公司 | Device and method for measuring inertial parameters of automobile parts |
| CN112815900A (en) * | 2021-02-03 | 2021-05-18 | 十堰风神汽车橡塑制品有限公司 | Coordinate system establishing method and rigid body centroid and inertia parameter testing method |
| CN113483706A (en) * | 2021-06-23 | 2021-10-08 | 东风汽车股份有限公司 | Inertial parameter measuring method for countless-mode power assembly |
| CN113588166A (en) * | 2021-06-17 | 2021-11-02 | 江西江铃集团新能源汽车有限公司 | Power assembly rotational inertia measuring method and device, medium and electronic equipment |
| CN113624399A (en) * | 2021-08-20 | 2021-11-09 | 哈尔滨工业大学 | Object rotational inertia measuring method applied to large-space rope driving system |
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2008
- 2008-05-28 CN CNA200810053278XA patent/CN101281075A/en active Pending
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915638A (en) * | 2010-07-26 | 2010-12-15 | 重庆大学 | Measuring device and method of all-inertial parameter of rigid body |
| CN102393277A (en) * | 2011-11-22 | 2012-03-28 | 天津大学 | Measuring apparatus of rotational inertia of object and method thereof |
| CN102494845A (en) * | 2011-11-22 | 2012-06-13 | 天津大学 | Device and method for measuring inertia product of object |
| CN102507091A (en) * | 2011-11-22 | 2012-06-20 | 天津大学 | Object mass center measuring device and method |
| CN102507091B (en) * | 2011-11-22 | 2014-01-15 | 天津大学 | Object mass center measuring device and method |
| CN103969002B (en) * | 2013-02-06 | 2016-01-20 | 广州汽车集团股份有限公司 | A kind of object mass center method of testing |
| CN103969002A (en) * | 2013-02-06 | 2014-08-06 | 广州汽车集团股份有限公司 | Object centroid testing method |
| CN103162903A (en) * | 2013-02-25 | 2013-06-19 | 北京科技大学 | Initiative balanced three-wire torsional pendulum principle rigid body dynamics parameter testing platform |
| CN105092153B (en) * | 2014-05-13 | 2018-06-26 | 天津航天瑞莱科技有限公司 | A kind of high-precision large-sized structural parts centroid measurement system and method |
| CN105092153A (en) * | 2014-05-13 | 2015-11-25 | 天津航天瑞莱科技有限公司 | High-precision large-scale structural component centroid measurement system and method |
| CN104296924B (en) * | 2014-11-04 | 2017-10-10 | 广西大学 | Power assembly inertial parameter method of testing |
| CN110530572A (en) * | 2018-05-24 | 2019-12-03 | 上汽通用五菱汽车股份有限公司 | A kind of arrangements for automotive doors center mass measuring device |
| CN110174206A (en) * | 2019-04-26 | 2019-08-27 | 交通运输部天津水运工程科学研究所 | A kind of three-dimensional total power measuring device and measuring method of experiment |
| CN110174206B (en) * | 2019-04-26 | 2024-02-02 | 交通运输部天津水运工程科学研究所 | Device and method for measuring three-dimensional total force for experiment |
| CN110702310A (en) * | 2019-11-13 | 2020-01-17 | 中国第一汽车股份有限公司 | Device and method for measuring inertial parameters of automobile parts |
| CN112815900A (en) * | 2021-02-03 | 2021-05-18 | 十堰风神汽车橡塑制品有限公司 | Coordinate system establishing method and rigid body centroid and inertia parameter testing method |
| CN113588166A (en) * | 2021-06-17 | 2021-11-02 | 江西江铃集团新能源汽车有限公司 | Power assembly rotational inertia measuring method and device, medium and electronic equipment |
| CN113483706A (en) * | 2021-06-23 | 2021-10-08 | 东风汽车股份有限公司 | Inertial parameter measuring method for countless-mode power assembly |
| CN113483706B (en) * | 2021-06-23 | 2022-03-18 | 东风汽车股份有限公司 | Inertial parameter measuring method for countless-mode power assembly |
| CN113624399A (en) * | 2021-08-20 | 2021-11-09 | 哈尔滨工业大学 | Object rotational inertia measuring method applied to large-space rope driving system |
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Open date: 20081008 |