CN103162903A - Initiative balanced three-wire torsional pendulum principle rigid body dynamics parameter testing platform - Google Patents
Initiative balanced three-wire torsional pendulum principle rigid body dynamics parameter testing platform Download PDFInfo
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- CN103162903A CN103162903A CN2013100586456A CN201310058645A CN103162903A CN 103162903 A CN103162903 A CN 103162903A CN 2013100586456 A CN2013100586456 A CN 2013100586456A CN 201310058645 A CN201310058645 A CN 201310058645A CN 103162903 A CN103162903 A CN 103162903A
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Abstract
The invention provides a three-wire torsional pendulum principle rigid body dynamics parameter testing platform. The testing platform comprises a testing platform top disc (11), three cycloids (6) and a tray (4). The three-wire torsional pendulum principle rigid body dynamics parameter testing platform is characterized in that the testing platform further comprises three force sensors (10), a balancing weight block (5) and a tray reference identification (14); the three force sensors (10) are respectively located at the upper ends of the three cycloids (6) and rigidly fixed on three suspension points of the top disc (11), wherein the three suspension points are evenly distributive in a circle. The tray reference identification (14) is a position identification which is located on the upper surface of the tray (4). The testing platform can be used for ensuring centering demands for three-wire pendulum measurement through the corresponding of the balancing weight block (5) and the tray reference identification (14) and measuring accuracy can be guaranteed; rotational inertia of a added balancing weight block can be rapidly obtained, wherein the rotational inertia of the added balancing weight block corresponds to the a torsional pendulum axis. Only one time measurement can be needed to obtain the fixed-axis rotational inertia of a measured object.
Description
Technical field
Employing three lines that the present invention relates to physical parameter test board, particularly a kind of active balancing rock the test board that theory of oscillation is carried out the rigid dynamics parameter testing.
Background technology
Moment of inertia is an important kinetic parameter, the measurement that utilizes three line Inertia Based on Torsion Pendulum Methods to carry out moment of inertia has two kinds of situations: a kind of is the dead in line of rocking of the barycenter of testee and three-line pendulum, this situation is present in the object under test of regular shape usually, can satisfy requirement to the heart by simple positioning instant.The second situation be testee barycenter not with the dead in line of rocking of three-line pendulum, as the parts in the manufacturing industry such as auto parts, volume is large, quality is large, is not easy the heart.This moment three cycloid unbalance stress, do not satisfy rock to heart requirement.For this reason, carry out as the case may be counterweight, make three cycloids stressed evenly by applying the counterweight counterweight.Measure total moment of inertia of device, then deduct the moment of inertia of pallet and counterweight counterweight, obtain the moment of inertia of determinand.In the second situation, in order to draw the moment of inertia of counterweight, after mating the counterweight counterweight at every turn, all need testee is removed, then place identical counterweight in the symmetric position of counterweight counterweight, again measure the moment of inertia of these counterweights, afterwards with the moment of inertia of this moment of inertia divided by 2 acquisition counterweight counterweights.Yet for the testee of large volume, large quality, the placement on the test board pallet and removing has not only brought loaded down with trivial details testing process, and the out of true that the symmetric position of coupling counterweight is placed has also reduced the degree of accuracy of measuring.
Summary of the invention
The present invention is intended to solve at least one of above-mentioned technological deficiency and proposes a kind of three line Inertia Based on Torsion Pendulum Method rigid dynamics parameter test boards.
Described test board comprises that test board takes over a business (11), three cycloids (6) and pallet (4), it is characterized in that, described test board further comprises three power sensors (10), balancing weight (5) and pallet reference identification (14);
Described three power sensors (10) lay respectively at the upper end of three cycloids (6), and are rigidly secured on three upper suspension points that are circularly and evenly distributed of (11);
Described pallet reference identification (14) is the station location marker that is positioned at tray upper surface.
Preferably, described balancing weight (5) is that known quality reaches the mass around the moment of inertia of its barycenter vertical axis.
Preferably, described balancing weight (5) is disc, truncated cone-shaped or cube shaped.
Preferably, a vertical through hole can be offered in described balancing weight (5) center.
Preferably, described pallet reference identification take at the pallet center as the polar coordinate system (141) of initial point, and described polar coordinate system (141) is the annulus of a plurality of different radiis of identifying take the pallet center as initial point.
Preferably, described pallet reference identification be take the pallet center as the center of circle, different radii circumference on equally distributed a plurality of shrinkage pools (142).
Preferably, described three upper suspension point place diameter of a circles are 200-5000mm.
In the present invention, by the cooperation of balancing weight 5 and pallet reference identification, guarantee that three-line pendulum measures to heart requirement, guaranteed measuring accuracy; Can obtain rapidly add balancing weight with respect to the moment of inertia that rocks axis, only need one-shot measurement just can know the fixed-axis rotation inertia of testee.
Description of drawings
Fig. 1 is the complicated rigid dynamics parameter test boards of three line Inertia Based on Torsion Pendulum Methods in the embodiment of the present invention.
Fig. 2 is the support of the complicated rigid dynamics parameter test board of three line Inertia Based on Torsion Pendulum Methods in the embodiment of the present invention.
Fig. 3 is the runout system of the complicated rigid dynamics parameter test board of three line Inertia Based on Torsion Pendulum Methods in the embodiment of the present invention.
Fig. 4 is the balanced system of the complicated rigid dynamics parameter test board of three line Inertia Based on Torsion Pendulum Methods in the embodiment of the present invention.
Fig. 5 is the pallet schematic diagram of the complicated rigid dynamics parameter test board of three line Inertia Based on Torsion Pendulum Methods in the embodiment of the present invention.
Fig. 6 is pallet lifting and the centring means of the complicated rigid dynamics parameter test board of three line Inertia Based on Torsion Pendulum Methods in the embodiment of the present invention.
1 upright post reinforcing plate; 2 chassis; 3 pallet reinforcements; 4 pallets; 5 balancing weights; 6 cycloids; 7 draw-beam stiffening plates; 8 columns; 9 draw-beams; 10 sensors; 11 take over a business; 12 jacking gears; 13 centring means; 14 pallet reference identification; 15 pallet manholes.
Embodiment
The below describes embodiments of the invention in detail, and the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.
The three complicated rigid dynamics parameter test boards of line Inertia Based on Torsion Pendulum Methods in the present invention mainly comprise four parts: support, runout system, active balancing system, pallet lifting and centring means.
The support of one: three complicated rigid dynamics parameter test board of line Inertia Based on Torsion Pendulum Method
The support of the complicated rigid dynamics parameter test board of three line Inertia Based on Torsion Pendulum Methods comprises chassis 2, column 8, draw-beam 9 and takes over a business 11.
In the present invention, the support chassis 2 of the three complicated rigid dynamics parameter test boards of line Inertia Based on Torsion Pendulum Methods is radial, and chassis structure is centered by an equilateral triangle, and the same side, every edge of equilateral triangle extends the prolongation limit of equal length.
Support take over a business 11 with chassis 2 similar, be equally radial, take over a business structure equally centered by an equilateral triangle, the same side, every edge of equilateral triangle extends the prolongation limit of equal length, in order to reserve installing space for pallet lift device 12, take over a business to extend the limit and extend with respect to the chassis opposition side that the limit is positioned at Center-triangle.For example, center chassis triangle each limit is to extend along the left side of each length of side, and taking over a business Center-triangle each limit is to extend along the right side of each length of side, as shown in Figure 2.
For stablizing of reinforced support, the chassis 2 center equilateral triangle length of sides are more than or equal to the center equilateral triangle length of side of taking over a business 11, and the chassis circumradius is more than or equal to taking over a business circumradius.
Support comprises three root posts 8, and column can utilize section bar, steel pipe or weldless steel tube to process through blocking.Every root post 8 two ends one of connecting base plate Center-triangle respectively extend the top, limit and take over a business one of Center-triangle and extend the top, limit, every root post lower end is connected in one of chassis 2 Center-triangle and extends the top, limit, and the upper end is connected in 11 Center-triangles correspondences and extends the top, limit; The column two ends can connect upright post reinforcing plate 1 by welding, riveted joint or bolt mode, and the stiffening plate 1 at column two ends and chassis 2, taking over a business 11 connected mode can be with bolts, to facilitate installation, dismounting and loose mail transportation; The chassis circumradius is more than or equal to taking over a business circumradius, three root posts are all put or vertically upward all to carriage center line (being chassis or the axis of taking over a business) inclination certain angle, with guarantee test board support of the present invention as the lifting tested rigid body support the time stability, be convenient to lift by crane tested rigid body, also need not foot bolt and fix.
In order to be adapted to large volume, the measurement of the complicated rigid body of quality greatly, column 8 length ranges can be arranged between 1000 ~ 15000 mm; Column to the inclination angle scope of carriage center line between 0 ~ 30 °.
Support comprises crane boom, and crane boom is the equilateral triangle structure that draw-beam 9 two ends by three equal length are connected and consist of in twos, and as shown in Figure 1, wherein connected mode can be welding, riveted joint or bolt etc. in twos; Three draw-beams lay respectively at three root posts between any two, can utilize section bar (as: square steel, joist steel etc.) to cut off forms, each summit on the equilateral triangle crane boom is welded with a draw-beam stiffening plate 7, be bolted with the draw-beam stiffening plate 7 that is welded in column middle part, to facilitate installation, dismounting and loose mail transportation; Crane boom is on the chassis 2 and take over a business between 11, and is parallel to take over a business and takes over a business, and is used for hanging hoisting device such as chain block or electric block (can adopt the bridge-type electric block), in order to tested rigid body is hung on pallet 4 or hangs pallet 4.
By means of this support, three-line pendulum runout system can be installed, jacking gear 12 that can tray 4 can be installed tested rigid body boom hoisting, and this support can stably be positioned over the level ground and need not foot bolt and fix simultaneously.
The runout system of two: three complicated rigid dynamics parameter test boards of line Inertia Based on Torsion Pendulum Method
As shown in Figure 3, the runout system of the three complicated rigid dynamics parameter test boards of line Inertia Based on Torsion Pendulum Methods comprises three cycloids 6, pallet 4, pallet reinforcement 3.
The radius of the suspension point place circumference of pallet reinforcement 3 is equal to or greater than the exradius of pallet 4, thereby the extend testing platform can be tested the feature dimension upper limit of rigid body, need not increase again simultaneously quality and the moment of inertia thereof of pallet, and then the extend testing platform can be tested the quality lower limit of rigid body.
Three cycloids 6 are equal in length; The cycloid upper end hangs on taking over a business on three upper suspension points that are circularly and evenly distributed of 11 of three-line pendulum test board by power sensor 10, and the cycloid lower end hangs on three lower suspension points that are circularly and evenly distributed of pallet 4 or pallet reinforcement 3; The upper suspension point place radius of a circle of three cycloids equates with lower suspension point place radius of a circle.
When on three cycloids, suspension point place radius of circle equated with lower suspension point place radius of circle, compared to the situation that upper and lower suspension point radius does not wait, the moment of inertia computing formula was simple, and measurement parameter is few, thereby measuring accuracy is high.
In the present invention, can dig some manhole 15(as shown in Figure 3 on pallet), through hole is evenly to distribute on the circumference take the pallet central point as the center of circle, so that in the situation that pallet rigidity meets the demands, alleviate the pallet own wt, thereby the extend testing platform can be tested the quality lower limit of rigid body.
The active balancing system of three: three complicated rigid dynamics parameter test boards of line Inertia Based on Torsion Pendulum Method
The active balancing system comprises power sensor 10, balancing weight 5 and pallet reference identification 14.
As shown in Figure 4, totally three of the power sensors 10 in the active balancing system lay respectively at the upper end of three cycloids, and cycloid 6 is rigidly secured to by power sensor 10 on three upper suspension points that are circularly and evenly distributed of 11.Can utilize the quality of force sensor measuring testee.in addition, due to when carrying out the measurement of moment of inertia, need to satisfy the requirement to the heart, and then guarantee that pallet barycenter in the process of rocking only moves up and down, the power sensor can be when being used for the testee mass measurement, be used for also judging whether three cycloid pulling force equate, when three force sensor measuring numerical value are consistent, show that three cycloid pulling force are identical, satisfied the requirement to the heart, and when three force sensor measuring numerical value are inconsistent, show that three cycloid pulling force are different, the pallet discontinuity equalization, do not satisfy heart requirement, at this moment, can carry out the position of testee, the adjustment of the position of balancing weight or size.Wherein, three upper suspension points or lower suspension point place diameter of a circle are 200-5000mm.
The active balancing system comprises some balancing weights 5, be used for tested rigid body on pallet 4 because of biasing, when causing tested rigid body not to the heart (three cycloid 6 pulling force are unequal), suitable balancing weight 5 is positioned on pallet 4, adjust its position, until three cycloid 6 pulling force equate, thereby make the barycenter and the common pedal line in pallet center of tested rigid body+balancing weight 5, satisfy the three-line pendulum test board to heart requirement.The centroid position of the balancing weight 5 of wherein, placing on pallet 4 will be determined by the reference identification point of pallet 4 upper surfaces.
Described balancing weight 5 is known quality and around the mass of the arbitrary shape of the moment of inertia of its barycenter vertical axis, disc mass for example, and because of its body rule, its barycenter is its center.Moment of inertia around its barycenter vertical axis can directly calculate based on theoretical formula, and accurately, precision is high, thereby guarantees the measuring accuracy of three-line pendulum.
A through hole (such as diameter 20 mm) can be offered in disc balancing weight 5 centers, in order to observe and use the subpoint of its barycenter of marking pen mark on pallet; The outside diameter of disc mass and thickness thereby quality can Set arbitrarilies, for example, outside diameter 250 mm, thickness is the 20 kg masses of 60 mm approximately, outside diameter 250 mm, thickness is the 10 kg masses of 30 mm approximately, outside diameter 145 mm, thickness is the 5 kg masses of 40 mm approximately, and outside diameter 95 mm, thickness is the 2 kg masses of 40 mm approximately; The shape of mass is not limited only to the disc mass, can also be truncated cone-shaped, cube shaped etc.
Pallet reference identification 14 is the station location markers that are positioned at tray surface.
As shown in Fig. 5 a, the pallet reference identification can be labeled in tray surface take at the pallet center as the polar coordinate system 141 of initial point, identify the annulus of a plurality of different radiis as initial point take the pallet center, based on this, can determine the positional information of any point on pallet, thereby determine the placement location of balancing weight 5.
Replacedly, the pallet reference identification also can be take the pallet center as the center of circle, different radii circumference on equally distributed several gauge points 142, as shown in Fig. 5 b, gauge point is the taper hole of diameter 1mm, dark 1mm, gauge point evenly distributes on the circumference of different radii, and it is four, eight, ten second-class that the gauge point number point that distributes on each circumference is respectively.
The quality of the balancing weight 5 of placing on pallet 4 and will rock the quality of system's (being the tested rigid body+balancing weight 5 of pallet reinforcement 3+ pallet 4+) and deduct around the moment of inertia that rocks axis from whole around the moment of inertia that rocks axis.
Because the quality of pallet reinforcement 3+ pallet 4 reaches and can obtain in advance around the moment of inertia that rocks axis, in addition, the mass M a of balancing weight 5 and known around the moment of inertia Ja of its barycenter vertical axis, balancing weight 5 can be by the determined balancing weight barycenter of pallet reference sign subpoint calculating apart from r to the pallet center: Ja+Ma*r around the moment of inertia that rocks axis
2Thereby only need once test can obtain tested rigid body around the moment of inertia Jb that rocks axis, (the whole system of rocking that is about to record deducts pallet reinforcement, pallet, balancing weight around the moment of inertia that rocks axis around the moment of inertia that rocks axis), again measure specially the moment of inertia of balancing weight after need not to unload tested rigid body, to improve testing efficiency, shorten the test duration, reduce the error link, improve measuring accuracy.
The complicated rigid dynamics parameter test board pallet lifting of line Inertia Based on Torsion Pendulum Method in four: three and centring means
As shown in Figure 6, lifting and centring means comprise jacking gear 12, centring means 13.
Centring means 13 comprises a lifting jack, and jack piston upper end installation one centration axis can rise or descend with piston.There is the 5x5 chamfering centration axis upper end, works the center pit that before putting, centration axis is passed pallet 4 with the piston rising pallet is located, so that pallet plays pendulum; Rise fall after pendulum centration axis with eliminate its with pallet 4 center hole walls between friction, reduce to rock the damping of vibration, raising period measurement precision.Wherein, centring means can be manual or electronic hydraulic jack;
Correspondingly, a through hole is established at the center of the pallet 4 in three-line pendulum test board runout system, in order to penetrate above-mentioned centration axis, guarantees that pallet only does the pure vibration of rocking around center vertical axis, and mixed pendulum or conical motion can not occur, guarantees the period measurement precision.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is by claims and be equal to and limit.
Claims (7)
1. line Inertia Based on Torsion Pendulum Method rigid dynamics parameter test board, described test board comprises that test board takes over a business (11), three cycloids (6) and pallet (4), it is characterized in that, described test board further comprises three power sensors (10), balancing weight (5) and pallet reference identification (14);
Described three power sensors (10) lay respectively at the upper end of three cycloids (6), and are rigidly secured on three upper suspension points that are circularly and evenly distributed of (11);
Described pallet reference identification (14) is the station location marker that is positioned at tray upper surface.
2. three line Inertia Based on Torsion Pendulum Method rigid dynamics parameter test boards as claimed in claim 1, is characterized in that, described balancing weight (5) is that known quality reaches the mass around the moment of inertia of its barycenter vertical axis.
3. three line Inertia Based on Torsion Pendulum Method rigid dynamics parameter test boards as claimed in claim 2, is characterized in that, described balancing weight (5) is disc, truncated cone-shaped or cube shaped.
4. three line Inertia Based on Torsion Pendulum Method rigid dynamics parameter test boards as claimed in claim 3, is characterized in that, a vertical through hole can be offered in described balancing weight (5) center.
5. three line Inertia Based on Torsion Pendulum Method rigid dynamics parameter test boards as claimed in claim 1, it is characterized in that, described pallet reference identification take at the pallet center as the polar coordinate system (141) of initial point, and described polar coordinate system (141) is the annulus of a plurality of different radiis of identifying take the pallet center as initial point.
6. three line Inertia Based on Torsion Pendulum Method rigid dynamics parameter test boards as claimed in claim 1, is characterized in that, described pallet reference identification be take the pallet center as the center of circle, different radii circumference on equally distributed a plurality of shrinkage pools (142).
7. three line Inertia Based on Torsion Pendulum Method rigid dynamics parameter test boards as claimed in claim 1, is characterized in that, described three upper suspension point place diameter of a circles are 200-5000mm.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111982401A (en) * | 2019-05-21 | 2020-11-24 | 南京工业大学 | Method for measuring object mass |
| CN115060419A (en) * | 2022-05-25 | 2022-09-16 | 华电电力科学研究院有限公司 | Method for positioning dynamic balance weight angle of rotary machine |
| CN115060419B (en) * | 2022-05-25 | 2024-10-22 | 华电电力科学研究院有限公司 | Positioning method for dynamic balance weight angle of rotary machine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030046628A (en) * | 2001-12-06 | 2003-06-18 | 현대자동차주식회사 | An apparatus for testing moment of inertia |
| WO2003102528A1 (en) * | 2002-05-31 | 2003-12-11 | Politecnico Di Milano | Device for measuring the inertia tensor of a rigid body |
| CN101281075A (en) * | 2008-05-28 | 2008-10-08 | 天津大学 | Large-sized power plant mass inertia characteristic parameters measuring and taking synthetic experimental bench |
| CN202002773U (en) * | 2011-03-24 | 2011-10-05 | 十堰东森汽车密封件有限公司 | Inertial parameter measuring integrated test table for motive power assembly |
| CN202093708U (en) * | 2011-06-10 | 2011-12-28 | 内蒙古科技大学 | Three-line pendulum rotational inertia experimental instrument |
| CN203116912U (en) * | 2013-02-25 | 2013-08-07 | 北京科技大学 | Actively balanced rigid-body kinetic parameter testboard by means of three-wire pendulum |
-
2013
- 2013-02-25 CN CN2013100586456A patent/CN103162903A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030046628A (en) * | 2001-12-06 | 2003-06-18 | 현대자동차주식회사 | An apparatus for testing moment of inertia |
| WO2003102528A1 (en) * | 2002-05-31 | 2003-12-11 | Politecnico Di Milano | Device for measuring the inertia tensor of a rigid body |
| CN101281075A (en) * | 2008-05-28 | 2008-10-08 | 天津大学 | Large-sized power plant mass inertia characteristic parameters measuring and taking synthetic experimental bench |
| CN202002773U (en) * | 2011-03-24 | 2011-10-05 | 十堰东森汽车密封件有限公司 | Inertial parameter measuring integrated test table for motive power assembly |
| CN202093708U (en) * | 2011-06-10 | 2011-12-28 | 内蒙古科技大学 | Three-line pendulum rotational inertia experimental instrument |
| CN203116912U (en) * | 2013-02-25 | 2013-08-07 | 北京科技大学 | Actively balanced rigid-body kinetic parameter testboard by means of three-wire pendulum |
Non-Patent Citations (2)
| Title |
|---|
| 李刚常等: "用三线摆测定物体对非质心轴的转动惯量", 《力学与实践》 * |
| 苏成谦等: "大型刚体惯性参数识别的三线扭摆系统实验方法改进研究", 《工程力学》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111982401A (en) * | 2019-05-21 | 2020-11-24 | 南京工业大学 | Method for measuring object mass |
| CN111982401B (en) * | 2019-05-21 | 2022-04-08 | 南京工业大学 | Method for measuring object mass |
| CN115060419A (en) * | 2022-05-25 | 2022-09-16 | 华电电力科学研究院有限公司 | Method for positioning dynamic balance weight angle of rotary machine |
| CN115060419B (en) * | 2022-05-25 | 2024-10-22 | 华电电力科学研究院有限公司 | Positioning method for dynamic balance weight angle of rotary machine |
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Application publication date: 20130619 |