CN106441708A - Double-blade lever type barycenter measuring device and measuring method thereof - Google Patents
Double-blade lever type barycenter measuring device and measuring method thereof Download PDFInfo
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- CN106441708A CN106441708A CN201611118687.4A CN201611118687A CN106441708A CN 106441708 A CN106441708 A CN 106441708A CN 201611118687 A CN201611118687 A CN 201611118687A CN 106441708 A CN106441708 A CN 106441708A
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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
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/12—Static balancing; Determining position of centre of gravity
- G01M1/122—Determining position of centre of gravity
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Abstract
The invention provides a double-blade lever type barycenter measuring device and a measuring method thereof. The measuring device comprises a frame cover and a barycenter measuring instrument arranged in the frame cover, wherein the barycenter measuring instrument comprises a cross beam, a support blade, a working blade, a support pillar, a support beam and an assembling clamp, wherein the support pillar and the support beam are successively arranged under the cross beam; the upper end of the support blade is connected with the cross beam; the support blade is located on the middle parts of the support pillar and the support beam; the lower end of the support blade is connected with the bottom of the frame cover through a projection screen; a pointer is arranged under the support blade; the working blade and the assembling clamp are respectively arranged at the two ends of the cross beam; a scale is hung at the lower end of the working blade through a lifting lug; an electronic balance is jointed on the side of the projection screen, opposite to the scale. According to the measuring method, on the basis of a lever balancing principle, a standard block is selected for accurately measuring the plane of the barycenter of an irregular object, so that the mounting of the engine blade is benefited.
Description
Technical field
The invention belongs to test and technical field of measurement and test, be specifically related to a kind of double knife edges lever center mass measuring device and
Its measuring method.
Background technology
Barycenter is the mass centre of object, is also the center of suffered gravity when gravitational field is uniform, and it is numerous engineering neck
Need the important parameter accurately measuring in domain, for the object of high-speed rotation, barycenter is coaxially extremely important, therefore compel to be essential
Want a kind of instrument of the mensure mass center position of object of high-accuracy general.The center mass measuring device adopting on the market at present generally has
Specific application scenario, when running into specific measurement requirement, the range that usually can there is measurement is excessive, or certainty of measurement is not
Enough the problems such as, and gauge systems structure is more complicated；And current centroid measurement does not have traceability not comparable.
For overcoming the shortcomings of the instrument presence of existing centroid measurement institute, the Chinese patent of Publication No. CN204142424U discloses
A kind of barycenter surveys scape instrument, and including the gimbal lever, the central lower of the gimbal lever is provided with bearing edge block, and mesh is identical with bearing edge block
Being respectively provided on two sides with of distance measures edge of a knife block, and bearing edge block and measurement edge of a knife block are respectively provided with point of a knife, the center of the gimbal lever
Upper support object under test；Edge of a knife seat, the point of a knife of edge of a knife seat supports bearing edge block；And two electronic scales support measurement respectively
The point of a knife of edge of a knife block, when the barycenter of object under test is eccentric, two electronic scales have the difference of registration, and center mass measuring device is in balance
When bar reaches predetermined horizontality, the differential force of two electronic scale registrations is multiplied by the distance of measurement edge of a knife block and bearing edge block
Obtain the eccentric moment producing of barycenter of object under test, further according to principle of moments, moment is treated divided by the gravity acquisition of object under test
Survey the barycenter eccentric distance of object.But the object and actual barycenter that are that matter is inclined, are measurement assembles of the measurement of this technical scheme
Deviation distance, Measuring Object specific barycenter place face can not be measured, therefore, how to realize for barycenter all at one
The object that runs up on axial plane carries out centroid measurement, is current technical field of measurement and test technical problem urgently to be resolved hurrily.
Content of the invention
For solving above-mentioned technical problem, the invention provides a kind of double knife edges lever center mass measuring device.
The present invention is achieved by the following technical programs.
A kind of double knife edges lever center mass measuring device that the present invention provides, including mask and be arranged on the barycenter in mask
Measuring instrument；Described centroid measurement instrument includes crossbeam, bearing edge, working edge, pillar, joist and clamping device, described pillar
It is successively set on below the crossbeam with joist, the upper end of described bearing edge is connected with crossbeam, and be located at the middle part of pillar and joist,
The lower end of described bearing edge is connected with the bottom of mask by projection screen, and is provided with pointer below bearing edge, described
Working edge and clamping device are separately mounted to crossbeam two ends, and the lower end of described working edge is hung with the scale pan by hanger, institute
State projection screen and be also associated with electronic scale with scale pan opposite side.
Described clamping device includes clamping fixture seat, fixing port, movable plate and rotating handles, and wherein, fixing port is fixed on fixture
On the end face of seat, clamping fixture seat is respectively arranged with baffle plate positioned at fixing port both sides, two baffle plates on the clamping fixture seat for the movable plate it
Between, and realize movable plate and move on clamping fixture seat by rotating rotating handles.
Described mask bottom is located at and is provided with button below projection screen, and is provided with tune screen bar on button.
Described mask bottom is provided with spiral foot positioned at button both sides, and is connected with feet in spiral underfooting side.
Described scale pan top is provided with antivibrator, and bottom is provided with pan arrest.
Described clamping device is fixed on crossbeam by fixture fixing screws.
On described crossbeam, working edge side is provided with balance screw, and the lower section of balance screw is provided with counterweight
Hook.
Described mask bottom is additionally provided with the transformator powered for projection screen.
A kind of method using above-mentioned double knife edges lever center mass measuring device Measuring Object barycenter, this measuring method is profit
With lever balance theory, accurate measurement is carried out to irregular object barycenter place face by selection standard block, thus being conducive to sending out
The installation of motivation blade, concrete measuring method step is as follows：
(1) leveling measuring instrument：After installing clamping device on measuring instrument unloaded when start lever, and by balance screw and
Increase allotment weight to be balanced adjusting；
(2) weigh measured object：Using electronic scale weighing and record measured object；
(3) adjust and load lever balance after measured object：Measured object is loaded clamping device, is placed on pan of a steelyard by weighing box
On, and add lead button to weighing in box, start and reach balance on the right side of lever；
(4) measurement weighs the weight of box and lead button and records；
(5) press equalising torque formula calculation and measurement result.
The beneficial effects of the present invention is：
Compared with prior art, the present invention is capable of the object of high-speed rotation, and barycenter is all on an axial plane
Object mass center measures, and such that it is able to reduce centrifugal force, reduces the difference of frequency of vibration, strengthens properties of product, extends product
Service life, has great importance in improve product quality, the particularly installation of electromotor rotor blade shown.Using the present invention
Described centroid measurement instrument not only can measurement rules object barycenter it is also possible to measurement irregularly shaped object barycenter (density is not
Uniformly), using principle be equalising torque principle, using principle of moments, normal zero is made with the barycenter of standard rule object,
The barycenter of testee all with being compared of standardized centroid, and then measure the distance of testee offset criteria barycenter.Can
The face being located with accurate measurement testee；Not only ensured barycenter concentric co-axial in an installation but also quality had been reached according to quality test
Balance.The present invention solves traceability, you can ratio property, you can realize different manufacturers, be compared to each other between different batches.
Brief description
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of clamping device in the present invention；
Fig. 3 is the structural representation weighing box in the present invention；
Fig. 4 is the structural representation of Plays block A of the present invention；
Fig. 5 is the structural representation of Plays block B of the present invention；
Fig. 6 is the structural representation of Plays block C of the present invention.
In figure：1- crossbeam, 2- balances screw, 3- hanger, 4- pointer, 5- bearing edge, 6- mask, 7- working edge, 8-
Pillar, 9- joist, 10- antivibrator, 11- projection screen, the 12- scale pan, 13- pan arrest, 14- spiral foot, 15- feet, 16- button, 17-
Adjust screen bar, 18- clamping device, 19- counterweight is linked up with, 20- fixture fixing screws, 21- electronic scale, 22- transformator, 23- weighs box
Son, 24- lead button, 25- calibrated bolck A, 26- calibrated bolck B, 27- calibrated bolck C, 181- clamping fixture seat, 182- fixing port, 183- baffle plate,
184- movable plate, 185- rotating handles.
Specific embodiment
Technical scheme be described further below, but claimed scope be not limited to described.
As shown in Figure 1 and Figure 2, a kind of double knife edges lever center mass measuring device, including mask 6 and be arranged in mask 6
Centroid measurement instrument；Described centroid measurement instrument includes crossbeam 1, bearing edge 5, working edge 7, pillar 8, joist 9 and clamping device
18, described pillar 8 and joist 9 are successively set on below crossbeam 1, and the upper end of described bearing edge 5 is connected with crossbeam 1, and is located at
Pillar 8 and the middle part of joist 9, the lower end of described bearing edge 5 is connected with the bottom of mask 6 by projection screen 11, and is supporting
It is provided with pointer 4, described working edge 7 and clamping device 18 are separately mounted to crossbeam 1 two ends, described work knife below the edge of a knife 5
The lower end of mouth 7 is hung with the scale pan 12 by hanger 3, and described projection screen 11 is also associated with electronic scale 21 with the scale pan 12 opposite side.
Described clamping device 18 includes clamping fixture seat 181, fixing port 182, movable plate 184 and rotating handles 185, wherein, Gu
Determine mouth 182 to be fixed on the end face of clamping fixture seat 181, clamping fixture seat 181 be respectively arranged with baffle plate 183 positioned at fixing port 182 both sides,
Movable plate 184 is located between two baffle plates 183 on clamping fixture seat 181, and realizes movable plate 184 and exist by rotating rotating handles 185
Move on clamping fixture seat 181.Using the technical program, when using, fixing port 182 is sleeved on crossbeam 1 end of measuring instrument, and
Tightened using fixture fixing screws 20, then testee is clipped in baffle plate 183 and the movable plate away from rotating handles 185 one end
Between 184, by rotating handles 185, testee is fixed.In actual applications, the quality of clamping device 18 will require
As little as possible, the technical program makes clamping device 18 using titanium alloy or aluminum.
Described mask 6 bottom is located at and is provided with button 16 below projection screen 11, and is provided with tune screen bar 17 on button 16.
By adjusting screen bar 17, projection screen 11 is adjusted.
Described mask 6 bottom is provided with spiral foot 14 positioned at button 16 both sides, and is connected with feet below spiral foot 14
15.By feet 15, mask 6 is supported, due to being provided with spiral foot 14, the height of mask 6 can be adjusted, and energy
Ensure the degree of balance of mask 6.
The described scale pan 12 top is provided with antivibrator 10, and bottom is provided with pan arrest 13.
Described clamping device 18 is fixed on crossbeam 1 by fixture fixing screws 20.To be filled by fixture fixing screws 20
Folder fixture 18 is fixed on crossbeam 1, is easily installed and dismantles.
On described crossbeam 1, working edge 7 side is provided with balance screw 2, and is provided with the lower section of balance screw 2
Counterweight hook 19.Using the technical program, by balancing screw 2, the balance of crossbeam 1 can be adjusted, link up with 19 by counterweight
Increase balancing weight to be tested, different size of balancing weight is selected according to different requirements.
Described mask 6 bottom is additionally provided with the transformator 22 for projection screen 11 power supply.
As shown in Figure 1, Figure 3, the present invention is the measuring instrument of double knife edges lever.The edge of a knife in the middle of wherein is bearing edge 5,
Right side is working edge 7, and left side is the clamping device 18 of fixing measured object, supports the use, clamping in the design of this clamping device 18
Fixture 18 selects titanium alloy material, can be changed according to testee size.The right side scale pan 12 is to measured object measurement process
Middle placement weighs box 23, for keeping lever balance to add lead button 24, uses electronic balance 21 weighing box 23 after lever balance
And lead button 24 is weighed.Support the use in the design of this weighing box 23, can be selected according to testee quality size.
As described in Fig. 1 to Fig. 6, a kind of side using above-mentioned double knife edges lever center mass measuring device Measuring Object barycenter
Method, this measuring method is to utilize lever balance theory, by selection standard block, irregular object barycenter place face is carried out accurately
Measurement, thus being conducive to the installation of engine blade, concrete measuring method step is as follows：
(1) leveling measuring instrument：Start lever after clamping device 18 is installed on measuring instrument during zero load, and by balancing screw
2 are balanced adjusting with increasing allotment weight；
(2) weigh measured object：Using electronic scale weighing and record measured object；
(3) adjust and load lever balance after measured object：Measured object is loaded clamping device 18, is placed on weighing box 23
On pan of a steelyard 12, and add lead button 24 to weighing in box 23, start and reach balance on the right side of lever；
(4) measurement weighs the weight of box 23 and lead button 24 and records；
(5) press equalising torque formula calculation and measurement result.The result of measurement is the difference of object to be detected and calibrated bolck, when
, away from when being definite value, the barycenter of tested object is poor with standardized centroid constant, shows error concealment for standardized centroid.Standard rule object
Barycenter easily measures, and the geometry barycenter of the regular object of even density is exactly the actual barycenter of object, by three coordinates or other
Fine measuring instrument just can be with accurate measurement, with the barycenter of testee away from difference value, you can obtain accurate barycenter.
Instrument is first adjusted to measuring instrument using calibrated bolck before measuring, for reaching the purpose of accurate measurement, calibrated bolck
Mutually examined from three various sizes of regular objects.
As shown in Fig. 3, Fig. 4, Fig. 5, described three various sizes of calibrated bolcks be respectively calibrated bolck A25, calibrated bolck B26 and
Calibrated bolck C27, wherein calibrated bolck A25 are 5cm for length, and width and height are the cuboid of 2cm；Calibrated bolck B26 for length is
10cm, width and height are the cuboid of 2cm；Calibrated bolck C27 is 15cm for length, and width and height are the cuboid of 2cm.Mark
Quasi- block of material requirement is homogeneous, and shape need rule adjusts measuring instrument with the standard of measurement testee, and its quality will be use up
May be big, so it is easy to reduce error, in the technical program, preferentially select stainless steel material to make calibrated bolck.
Centroid measurement instrument principle of the present invention is as follows：
(1) unloaded trim is according to principle of moment balance：
Adjust lever balance, obtained according to the principle of equalising torque：
La×mLever is left=Lb×mLever is right；
(2) testee is placed on clamping device 18, when lever balances again, according to principle of moments phase Tongfang
To power produce moment can be superimposed, equation of equilibrium now is：
(mLever is right+m)×Lb=mLever is left×La+M×(X+La)
Because：La×mLever is left=Lb×mLever is right
So simplified formula is：mLb=M (X+La)
In above formula：LbFor the distance in the middle of two edges of a knife, i.e. the distance of bearing edge 5 and working edge 7, in mechanical balance
Generally distance is in 11cm, in design can be LbAccurately in 10cm, calculate after being easy to, lever left end is provided with regulation
Screw, right-hand member does not set set screw, and m is the quality adding, and M is the measured object quality put in fixture, is surveyed with electronic balance
The testee mass M of amount.
X is the centroid distance of testee, is a definite value；
X+La=(M/mCounterweight)Lb；
As follows to the survey calculation step of object mass center using said method：
(1) reference standard is measured, by result of calculation；Draw XMark+LaValue；
(2) tested object is measured, result of calculation；Draw XQuilt+LaValue；
(3) result of (1st) step is deducted with the result of (2nd) step；I.e. (XQuilt+La)-(XMark+La)=XQuilt-XMarkIt is possible to
Barycenter to tested object mass center offset criteria object.In this continuous mode, X mark is definite value, and M is definite value, LbIt is set to
10cm, might have minor variations during adjustment, but the change of the value of L can affect m counterweight, and the m counterweight of addition is
mLb, because the result of measurement is tested with standard difference, then when standardized centroid away from be definite value when, tested barycenter and mark
Quasi- barycenter difference is constant, error concealment.And during adjustment measuring instrument, it is mutually authenticated using two calibrated bolcks, permissible
Calculate the variable quantity of L, when the change of L brings regulating error to measurement or variable quantity brought into calculating, the change band of L can be eliminated
Error it is proposed that using two standard block check measuring instruments close with testee length, with nearest with testee length
Calibrated bolck does survey mass.
The barycenter of standard rule object M easily measures, (the geometry barycenter of the regular object of even density in gravitational field just
Be the actual barycenter of object, just can be with accurate measurement by three coordinates or other fine measuring instrument) and testee barycenter
Away from difference value, you can obtain accurate barycenter.
Claims (9)
1. a kind of double knife edges lever center mass measuring device, including mask (6) and be arranged on centroid measurement instrument in mask (6),
It is characterized in that：Described centroid measurement instrument includes crossbeam (1), bearing edge (5), working edge (7), pillar (8), joist (9)
With clamping device (18), described pillar (8) and joist (9) are successively set on below crossbeam (1), described bearing edge (5) upper
End is connected with crossbeam (1), and is located at the middle part of pillar (8) and joist (9), and projection screen is passed through in the lower end of described bearing edge (5)
(11) be connected with the bottom of mask (6), and be provided with pointer (4) below bearing edge (5), described working edge (7) and dress
Folder fixture (18) is separately mounted to crossbeam (1) two ends, and the lower end of described working edge (7) is hung with the scale pan by hanger (3)
(12), described projection screen (11) and the scale pan (12) opposite side are also associated with electronic scale (21).
2. double knife edges lever center mass measuring device as claimed in claim 1 and its measuring method it is characterised in that：Described dress
Folder fixture (18) includes clamping fixture seat (181), fixing port (182), movable plate (184) and rotating handles (185), wherein, fixing port
(182) it is fixed on the end face of clamping fixture seat (181), clamping fixture seat (181) is upper to be respectively arranged with baffle plate positioned at fixing port (182) both sides
(183), movable plate (184) is located between two baffle plates (183) on clamping fixture seat (181), and real by rotating rotating handles (185)
Existing movable plate (184) is in the upper movement of clamping fixture seat (181).
3. double knife edges lever center mass measuring device as claimed in claim 1 and its measuring method it is characterised in that：Described frame
Cover (6) bottom is located at and is provided with button (16) below projection screen (11), and is provided with tune screen bar (17) on button (16).
4. double knife edges lever center mass measuring device as claimed in claim 1 and its measuring method it is characterised in that：Described frame
Cover (6) bottom is provided with spiral foot (14) positioned at button (16) both sides, and is connected with feet (15) below spiral foot (14).
5. double knife edges lever center mass measuring device as claimed in claim 1 and its measuring method it is characterised in that：Described scale
Disk (12) top is provided with antivibrator (10), and bottom is provided with pan arrest (13).
6. double knife edges lever center mass measuring device as claimed in claim 1 and its measuring method it is characterised in that：Described dress
Folder fixture (18) is fixed on crossbeam (1) by fixture fixing screws (20).
7. double knife edges lever center mass measuring device as claimed in claim 1 and its measuring method it is characterised in that：Described horizontal stroke
Beam (1) is upper to be provided with balance screw (2) positioned at working edge (7) side, and the lower section of balance screw (2) is provided with counterweight extension
Hook (19).
8. double knife edges lever center mass measuring device as claimed in claim 1 and its measuring method it is characterised in that：Described frame
Cover (6) bottom is additionally provided with the transformator (22) powered for projection screen (11).
9. one kind is using double knife edges lever center mass measuring device Measuring Object barycenter as described in claim 1 to 8 any one
Method it is characterised in that：This measuring method is to utilize lever balance theory, by selection standard block to irregular object barycenter
Place face carries out accurate measurement, thus being conducive to the installation of engine blade, concrete measuring method step is as follows：
(1) leveling measuring instrument：Measuring instrument installs clamping device (18) unloaded afterwards when start lever, and by balancing screw
(2) allocate weight and be balanced adjusting with increase；
(2) weigh measured object：Using electronic scale weighing and record measured object；
(3) adjust and load lever balance after measured object：Measured object is loaded clamping device (18), box (23) will be weighed and be placed on
On pan of a steelyard (12), and add lead button (24) to weighing in box (23), start and reach balance on the right side of lever；
(4) measurement weighs the weight of box (23) and lead button (24) and records；
(5) press equalising torque formula calculation and measurement result.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611118687.4A CN106441708A (en) | 2016-12-07 | 2016-12-07 | Double-blade lever type barycenter measuring device and measuring method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611118687.4A CN106441708A (en) | 2016-12-07 | 2016-12-07 | Double-blade lever type barycenter measuring device and measuring method thereof |
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| CN201611118687.4A Pending CN106441708A (en) | 2016-12-07 | 2016-12-07 | Double-blade lever type barycenter measuring device and measuring method thereof |
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| CN108362439A (en) * | 2017-11-09 | 2018-08-03 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of standardized centroid exemplar centroid position two-dimentional measuring device and measurement method |
| CN108692697A (en) * | 2018-03-09 | 2018-10-23 | 深圳市信维通信股份有限公司 | A kind of flatness checking device and method |
| CN108801188A (en) * | 2018-06-26 | 2018-11-13 | 上海航天电子通讯设备研究所 | The measurement tooling and measurement method of telemetering module centroid position on bullet |
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| CN109596195A (en) * | 2018-11-15 | 2019-04-09 | 北京航天计量测试技术研究所 | A kind of mass measuring method and device based on principle of moment balance |
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Cited By (11)
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| CN108692697A (en) * | 2018-03-09 | 2018-10-23 | 深圳市信维通信股份有限公司 | A kind of flatness checking device and method |
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| CN109540385A (en) * | 2018-11-15 | 2019-03-29 | 北京航天计量测试技术研究所 | A kind of one-dimensional center mass measuring device and method based on principle of moment balance |
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| CN109596195A (en) * | 2018-11-15 | 2019-04-09 | 北京航天计量测试技术研究所 | A kind of mass measuring method and device based on principle of moment balance |
| CN109596195B (en) * | 2018-11-15 | 2020-10-23 | 北京航天计量测试技术研究所 | Mass measurement method and device based on moment balance principle |
| CN109540385B (en) * | 2018-11-15 | 2020-12-15 | 北京航天计量测试技术研究所 | One-dimensional centroid measuring device and method based on moment balance principle |
| CN109540384B (en) * | 2018-11-15 | 2021-01-05 | 北京航天计量测试技术研究所 | Two-dimensional centroid measuring device and method based on moment balance principle |
| CN115615615A (en) * | 2022-11-21 | 2023-01-17 | 武汉地震计量检定与测量工程研究院有限公司 | Device and method for measuring axial centroid position of lens |
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Address after: 550014 No. 1111 Liyang Road, Baiyun District, Guiyang City, Guizhou Province Applicant after: Chinese Hangfa Guizhou Liyang aero Power Co. Ltd. Address before: 561102 Baiyun Town, Pingba County, Anshun City, Guizhou Province Applicant before: Guizhou Liyang Aerospace Power Co., Ltd. |
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