CN101561335A - Measuring mechanism for achieving mass, three-dimensional centroid and three-dimensional rotational inertia - Google Patents

Measuring mechanism for achieving mass, three-dimensional centroid and three-dimensional rotational inertia Download PDF

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Publication number
CN101561335A
CN101561335A CNA2009100650386A CN200910065038A CN101561335A CN 101561335 A CN101561335 A CN 101561335A CN A2009100650386 A CNA2009100650386 A CN A2009100650386A CN 200910065038 A CN200910065038 A CN 200910065038A CN 101561335 A CN101561335 A CN 101561335A
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CN
China
Prior art keywords
support
measuring
supporting plate
gear
shaft
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Application number
CNA2009100650386A
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Chinese (zh)
Inventor
卢志辉
孙志扬
薄悦
费星如
游广飞
张磊乐
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郑州机械研究所
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Priority to CNA2009100650386A priority Critical patent/CN101561335A/en
Publication of CN101561335A publication Critical patent/CN101561335A/en

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Abstract

The invention relates to a measuring mechanism for achieving mass, three-dimensional centroid and three-dimensional rotational inertia, which is characterized by comprising a machine base (1) provided with a rotating vertical shaft (14) in the center, a supporting plate (13) arranged at the upper end of the rotating vertical shaft, three sets of weighting sensors (2) arranged along the circumference on the bottom surface of the supporting plate, and an L bracket (4) arranged on the supporting plate through a connecting piece, wherein a vertical beam of the L bracket is provided with a rotary cross shaft (20) which is driven by a driving and gear-shifting mechanism (6) consisting of worm and gears, and a driven shaft (8) arranged in parallel with the rotary cross shaft; the rotary cross shaft is provided with a duplicate gear which consists of a sector gear A (19) and a full-gear gear B (5) and is meshed with a driven gear (18) on the driven shaft (8), and the duplicate gear can slide freely on the rotary cross shaft through a shifting fork (23); and the shaft end of the driven shaft (8) is provided with a connecting tool (9) for mounting a testing product, while the other end is provided with a torsion bar mechanism (7).

Description

Be used to realize the measuring mechanism of quality, three-dimensional barycenter and three-dimensional rotational inertia
Technical field
The present invention relates to a kind of measuring equipment, relate to a kind of measuring mechanism that is used for Measuring Object quality, three-dimensional barycenter and three-dimensional rotational inertia specifically.
Background technology
The measurement of the quality of object, three-dimensional barycenter and three-dimensional rotational inertia is used for the mass property parameter measurement of all kinds of flyers more, these parameters accurately be measured as object flight attitude simulation and Theoretical Calculation provides important underlying parameter, these parameters of while also are the important evaluatings of many parts in field such as Aero-Space, armament systems, engineering machinery and product.
At present, the measurement of object quality adopts the LOAD CELLS more than three directly to measure more, gets all sensor reading sums and gets final product.The metering system of barycenter is according to profile, the measuring accuracy requirement of measurand, and the metering system of employing is widely different, and that agent structure partly comprises is vertical, horizontal, sensor is directly measured, edge of a knife structure, rotation sensor structure or the like.Close with structure of the present invention horizontal type structure, its horizontal barycenter y of belonging to cAnd z cMeasurement drive product by roller rotation and rotate and carry out kinetic measurement a week and obtain, axial barycenter x cMeasurement directly calculate by LOAD CELLS reading and physical dimension.
The measurement of current three-dimensional rotational inertia be by horizontal frock and vertically frock change test product and realize with respect to the attitude of measuring equipment, generally need 2-3 cover frock to finish jointly, overlap horizontal frock by 1-2 respectively and measure Jy and Jz, vertically frock is measured Jx.
Horizontal type structure can carry out three-dimensional barycenter and three-dimensional rotational inertia measurement by said method for the test product of cylindrical shape, needs 2-3 cover frock and product repeatedly to lift during just for rotation inerttia, the cost height, and efficient is low.For profile is not under the cylindrical situation, owing to can't be driven by roller, its barycenter is measured also needs 2 cover frocks and 2 liftings, will realize that once lifting is installed this moment to finish whole three-dimensional measurements, must adopt the L support, drive product by the rotating shaft on the L support and rotate around horizontal rotating shaft.But this structure can only realize the barycenter three-dimensional measurement, can't realize measuring moment of inertia around the circle swing of transverse axis.
The major obstacle that realizes three-dimensional measurement is to solve when measuring barycenter must to carry out the circle swing around transverse axis under torsion bar drives when measuring moment of inertia around one week of horizontal rotational shaft.
In sum, at present by once lifting the measurement that can realize three-dimensional barycenter and one dimension moment of inertia, if but will carry out the measurement of three-dimensional barycenter and three-dimensional rotational inertia, at least want two cover frocks just can finish, and need carry out the lifting conversion of frock, product reappose location, so not only complex operation but also time-consuming taking a lot of work.
Summary of the invention
Purpose of the present invention provides a kind of measuring mechanism that is used for Measuring Object quality, three-dimensional barycenter and three-dimensional rotational inertia at existing weak point in the above-mentioned prior art just.
Purpose of the present invention can adopt following technique measures to realize:
The present invention is used to realize that the measuring mechanism of quality, three-dimensional barycenter and three-dimensional rotational inertia is included in the support that its centre is provided with vertical rotation shaft, be installed in the support supporting plate of vertical rotation shaft upper end, around supporting three groups of LOAD CELLS that the supporting plate bottom periphery is provided with, be installed in the L support that supports on the supporting plate by web member; The rotation transverse axis that on the upright beam of L support, drives and to parallel the driven shaft of setting with the rotation transverse axis by the driving formed by worm and gear and shifter, in rotation the duplicate gear that the follower gear with on the driven shaft is made up of sector gear and full-depth tooth gear is meshed is installed on the transverse axis, this duplicate gear can be free to slide rotating on the transverse axis by shift fork; Being useful on the connection frock that installs and measures product and the other end at the axle head of driven shaft is useful on and makes it produce the torsion bar mechanism of swing.
Be equipped with on the upright beam described in the present invention and be used to measure the secondary period measurement mechanism that driven shaft is done circumferential swing; Be provided with hydraulicefficiency elevation structure that is used for the lifting of L support and the backing plate that is used to realize that barycenter and inertia state switch mutually between the horizontal gird of described L support and the support end face.
The present invention is provided with between support supporting plate and support end face and is used to drive the inertia shifting component that supports the supporting plate swing and is used to measure the support supporting plate dominant period measurement mechanism of hunting period; Be provided with the torsion bar and the quick clamping device that can make the L support on the support supporting plate, carry out periodic oscillations by vertical rotation shaft in the vertical rotation shaft lower end; On the horizontal gird of L support, be provided with supplemental support and counterweight.
The present invention is based on support, L support, by being installed in three groups of LOAD CELLS assemblies, hydraulicefficiency elevation structure and backing plates on the frame surface, rotation inerttia state and barycenter measurement state are switched mutually, the L support need carry out rotation inerttia state (fan-shaped swing state) barycenter measurement state (state rotates a circle) according to measurement and switch mutually by duplicate gear simultaneously.Under barycenter measurement state,, can directly calculate axial barycenter x according to three groups of LOAD CELLS readings and physical dimension c, and horizontal barycenter y cAnd z cMeasurement be by drive with shifter on the full-depth tooth gear B drive the driven shaft drive product that rotates in a circumferential direction and rotate a circle and carry out one group of data of dynamic acquisition, and adopt special mathematics manipulation means to try to achieve.The quality of product can directly be obtained according to three groups of LOAD CELLS readings.Under the rotation inerttia state, at first the circle swing by vertical rotation shaft carries out two-dimentional rotation inerttia, finishes one-dimensional measurement when transverse axis is in the Y phase place, revolves to carry out Z phase rotated inertia after turning 90 degrees and measure.Then horizontal rotating shaft is switched to swing state, by the circle swing measured X phase rotated inertia of horizontal rotating shaft.So far just finished the measurement of quality, three-dimensional barycenter and three-dimensional rotational inertia.
Beneficial effect of the present invention is as follows:
Because three-dimensional barycenter is measured in the present invention and three-dimensional rotational inertia is measured, take the L supporting structure in design, and on the L supporting structure, designed the throw-over gear that to carry out week rotation and fan-shaped circle swing, thereby realize once lifting the purpose of the measurement content of finishing all items.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the vertical view that removes behind the L support.
Fig. 4 is partial view on the upright beam of L support.
Fig. 5 is for driving and the shifter view.
Fig. 6 is the D-D cut-open view of Fig. 5.
Fig. 7 is the C-C cut-open view of Fig. 5.
Sequence number among the figure: 1 support, 2 three LOAD CELLS that are used to measure barycenter, 3 hydraulicefficiency elevation structures, 4L support, 5 full-depth tooth gear B, 6 drive and shifter 7 torsion bars, 8 driven shafts, 9 connect frock, 10 supplemental support, 11 counterweights, 12 backing plates, 13 support supporting plate, 14 vertical rotation shafts, 15 supporting seats, 16 torsion bars and quick clamping device, 17 inertia shifting component, 18 follower gears, 19 sector gear A, 20 rotation transverse axis, 21 dominant period measurement mechanisms, 22 secondary period measurement mechanisms, 23 shift forks, 24 weigh top.
Embodiment
The present invention is further described below with reference to embodiment (accompanying drawing):
As shown in Figure 1 and Figure 2, the present invention is used to realize that the measuring mechanism of quality, three-dimensional barycenter and three-dimensional rotational inertia is included in the support 1 that its centre is provided with vertical rotation shaft 14, be installed in the support supporting plate 13 of vertical rotation shaft upper end, around supporting three groups of LOAD CELLS 2 that the supporting plate bottom periphery is provided with, be installed in the L support 4 that supports on the supporting plate by web member; The rotation transverse axis 20 that on the upright beam of L support, drives and to parallel the driven shaft 8 of setting with the rotation transverse axis by the driving formed by worm and gear and shifter 6, on rotation transverse axis 20 duplicate gear (referring to Fig. 5 Fig. 6, Fig. 7) that is meshed by sector gear A19 and full-depth tooth gear B 5 follower gears 18 that form and on the driven shaft 8 is installed, this duplicate gear can be free to slide on rotation transverse axis 20 by shift fork 23; Being useful on the connection frock 9 that installs and measures product and the other end at the axle head of driven shaft 8 is useful on and makes it produce the torsion bar mechanism 7 of swing; Be equipped with on the described upright beam and be used to measure the secondary period measurement mechanism 22 (referring to Fig. 4) that driven shaft 8 is done circumferential swing.
As Fig. 1, Fig. 2, shown in Figure 3, be provided with the hydraulicefficiency elevation structure 3 that is used for 4 liftings of L support between the horizontal gird of the support of L described in the present invention 4 and support 1 end face and be used to realize that the backing plate 12 that barycenter and inertia state switch mutually (passes through hydraulicefficiency elevation structure 3 jack-up L supports 4 when being the inertia measurement, supporting the backing plate 12 of packing on the supporting plate 13, hydraulicefficiency elevation structure 3 then lands, the L support is dropped on the backing plate 12 that supports supporting plate 13 fully, just measuring mechanism has been switched to inertia by the barycenter state and measured state; Barycenter then is by hydraulicefficiency elevation structure 3 jack-up L supports 4 when measuring, and removes backing plate 12, then by hydraulicefficiency elevation structure 3 L support 4 is dropped on fully and just can carry out the barycenter measurement on three groups of LOAD CELLS 2); Between support supporting plate 13 and support 1 end face, be provided with and be used to drive the inertia shifting component 17 that supports supporting plate 13 swings and be used to measure the support supporting plate dominant period measurement mechanism 21 of hunting period; Be provided with the torsion bar and the quick clamping device 16 that can make L support 4 on support supporting plate 13, carry out periodic oscillations by vertical rotation shaft 14 in vertical rotation shaft 14 lower ends; On the horizontal gird of L support 4, be provided with supplemental support 10 and counterweight 11.
Principle of work of the present invention is as follows:
Mass measurement: product is lifted on the connection frock 9, by be distributed in three LOAD CELLS 2 that are used to measure barycenter on the support (1) with certain geometrical shape, directly measure the weight G of product, G=w1+w2+w3, w1, w2, w3 are respectively the actual read number of three groups of LOAD CELLS 2 in the formula.By physical equation m=G/g, m-product quality in the formula, the G-product weight, the g-constant is taken as 9.8N/kg.
Barycenter is measured: comprise horizontal barycenter y c, z cWith axial barycenter x cMeasurement, by hydraulicefficiency elevation structure 3 with remove backing plate 12 and L support 4 is switched to barycenter measure state, that is: the L support is placed on three groups of LOAD CELLS 2 that distribute with certain geometrical shape, and all throws off with other parts beyond the L support.According to three groups of LOAD CELLS 2 readings and physical dimension, can directly calculate axial barycenter x c, and horizontal barycenter y cAnd z cMeasurement be by drive and shifter 6 on full-depth tooth gear B 5 drive the driven shafts 8 drive product that rotates in a circumferential direction and rotate a circle and dynamically gather one group of data, the special mathematics manipulation means of this The data are tried to achieve.
Rotation inerttia: comprise the measurement of transverse moment of inertia Jy, Jz and axial rotation inertia J x,, supporting the backing plate 12 of packing on the supporting plate 13 by hydraulicefficiency elevation structure 3 jack-up L supports 4; The hydraulicefficiency elevation structure 3 that then lands drops on the backing plate 12 that supports supporting plate 13 the L support fully, just measuring mechanism has been switched to inertia by the barycenter state and has measured state.Driving support supporting plate 13 by inertia shifting component 17 swings, support supporting plate 13 and be connected in vertical rotation shaft 14, vertical rotation shaft 14 acts in the supporting seat 15, supporting seat 15 and support 1 are connected by bolt, vertical rotation shaft 14 lower ends are connected with torsion bar and quick clamping device 16, torsion bar and quick clamping device 16 can make L support 4 carry out periodic oscillations by vertical rotation shaft 14 on support supporting plate 13, the cycle of its swing can have dominant period measurement mechanism 21 to record, under the interaction of vertical rotation shaft 14 and rotation transverse axis 20, can obtain two-dimentional moment of inertia Jy and Jz (that is: when horizontal driven shaft 8 is in the Y phase place by the relation of existing mature technology cycle and moment of inertia, the cycle that can pass through to be surveyed is tried to achieve one dimension moment of inertia Jy, then make horizontal driven shaft 8 rotate to the Z phase place place of 90 degree, just can try to achieve moment of inertia Jz) with same measuring method.Product is connected on the L support 4 upright beams by connecting frock 9, if the length of product is long or weight is heavier, consider safety factor, on the crossbeam of L support 4, be provided with supplemental support 10 and counterweight 11, supplemental support 10 can be carried out suitable adjusting according to the size of product, counterweight 11 can be matched according to the weight of product, so that L support two ends balance.The measurement of moment of inertia Jx is to finish on the upright beam of L support 4, by driving and 20 rotations of forming by worm and gear of shifter 6 driven rotary transverse axis, acting on the duplicate gear of being made up of sector gear A 19 and full-depth tooth gear B 5 on rotation transverse axis 20, duplicate gear can be free to slide on rotation transverse axis 20 by shift fork 23.When full-depth tooth gear B 5 meshed with follower gear 18, driven shaft 8 drove connection frocks 9 and products thereof and rotates in a circumferential direction together, as horizontal barycenter y cAnd z cMeasurement be exactly (and this moment, torsion bar 7 was in disengaged position with driven shaft 8) of realizing by this operation.When sector gear A19 and follower gear 18 engagements, sector gear A 19 stirs driven shaft 8 backs and its disengaging and makes driven shaft 8 do circumferentially swing, can be measured hunting period by the secondary period measurement mechanism 22 on the L support 4 upright beams, just (this moment, torsion bar 7 was in connection status with driven shaft 8, can make driven shaft 8 do compound motion can to draw moment of inertia Jx according to the relation of hunting period and moment of inertia; And this moment, L support 4 broke away from support supporting plate 13 by hydraulicefficiency elevation structure 3, made on its LOAD CELLS that acts on support 1 2).Sector gear A 19 angle of stirring can reasonably design according to the product of measuring and choose in addition.
So far, when product was connected on the L support 4 by connecting frock 9, the measurement of its quality, three-dimensional barycenter and three-dimensional rotational inertia just can realize once lifting the measurement of finishing all items according to the aforesaid operations method.

Claims (6)

1, a kind of measuring mechanism that is used to realize quality, three-dimensional barycenter and three-dimensional rotational inertia, it is characterized in that: described measuring mechanism is included in the support (1) that its centre is provided with vertical rotation shaft (14), be installed in the support supporting plate (13) of vertical rotation shaft upper end, around supporting three groups of LOAD CELLS (2) that the supporting plate bottom periphery is provided with, be installed in the L support (4) that supports on the supporting plate by web member; The rotation transverse axis (20) that on the upright beam of L support (4), drives and to parallel the driven shaft (8) of setting with the rotation transverse axis by the driving formed by worm and gear and shifter (6), the duplicate gear that the follower gear (18) with on the driven shaft (8) be made up of sector gear A (19) and full-depth tooth gear B (5) is meshed is installed in rotation transverse axis (20), and this duplicate gear can be free to slide rotating on the transverse axis (20) by shift fork (23); Axle head at driven shaft (8) is useful on the connection frock (9) that installs and measures product; The other end is equipped with torsion bar mechanism (7).
2, measuring mechanism according to claim 1 is characterized in that: the secondary period measurement mechanism (22) that is used to measure the circumferential swing of driven shaft (8) do is installed at Li Liangshang.
3, measuring mechanism according to claim 1 is characterized in that: be provided with the hydraulicefficiency elevation structure (3) that is used for L support (4) lifting between the horizontal gird of described L support (4) and support (1) end face and be used to the backing plate (12) of realizing that barycenter and inertia state switch mutually.
4, measuring mechanism according to claim 1 is characterized in that: be provided with the inertia shifting component (17) that is used for driving support supporting plate (13) swing and be used to measure the support supporting plate dominant period measurement mechanism (21) of hunting period between support supporting plate (13) and support (1) end face.
5, measuring mechanism according to claim 1 is characterized in that: be provided with the torsion bar and the quick clamping device (16) that can make L support (4) upward carry out periodic oscillations by vertical rotation shaft (14) at support supporting plate (13) in vertical rotation shaft (14) lower end.
6, measuring mechanism according to claim 1 is characterized in that: be provided with supplemental support (10) and counterweight (11) on the horizontal gird of L support (4).
CNA2009100650386A 2009-05-27 2009-05-27 Measuring mechanism for achieving mass, three-dimensional centroid and three-dimensional rotational inertia CN101561335A (en)

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CN101846542A (en) * 2010-06-02 2010-09-29 郑州机械研究所 Split type measuring mechanism for measuring quality and three-dimensional centroid of objects
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