CN206208453U - A kind of double knife edges lever center mass measuring device - Google Patents
A kind of double knife edges lever center mass measuring device Download PDFInfo
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- CN206208453U CN206208453U CN201621337196.4U CN201621337196U CN206208453U CN 206208453 U CN206208453 U CN 206208453U CN 201621337196 U CN201621337196 U CN 201621337196U CN 206208453 U CN206208453 U CN 206208453U
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- crossbeam
- measuring device
- mask
- knife edges
- mass measuring
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Abstract
The utility model provides a kind of double knife edges lever center mass measuring device, including mask and the centroid measurement instrument being arranged in mask, the centroid measurement instrument includes crossbeam, bearing edge, working edge, pillar, joist and clamping device, the pillar and joist are successively set on below the crossbeam, the upper end of the bearing edge is connected with crossbeam, and positioned at pillar and the middle part of joist, the lower end of the bearing edge is connected by projection screen with the bottom of mask, and pointer is provided with below bearing edge, the working edge and clamping device are separately mounted to crossbeam two ends, the lower end of the working edge is hung with the scale pan by hanger, the projection screen is also associated with electronic scale with scale pan opposite side.The utility model can accurately measure testee where face, barycenter concentric co-axial had not only been ensured in an installation but also the balance of quality had been reached according to quality test, solve traceability, be capable of achieving be compared to each other between different manufacturers, different batches.
Description
Technical field
The utility model belongs to experiment and technical field of measurement and test, is specifically related to a kind of double knife edges lever centroid measurement dress
Put.
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 necks
The important parameter of accurate measure is needed in domain, for the object of high speed rotation, barycenter is coaxially extremely important, therefore compels to be essential
Want a kind of instrument of the measure mass center position of object of high-accuracy general.The center mass measuring device for using on the market at present generally has
Specific application scenario, when specific measurement request is run into, the range that can usually 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.
To overcome the shortcomings of that existing centroid measurement institute instrument is present, the Chinese patent of Publication No. CN204142424U is disclosed
A kind of barycenter surveys scape instrument, including balancing pole, and the central lower of balancing pole is provided with bearing edge block, and mesh is identical with bearing edge block
Being respectively provided on two sides with for distance measures edge of a knife block, and bearing edge block and measurement edge of a knife block have point of a knife, the center of balancing pole respectively
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
The eccentric torque for producing of barycenter of object under test is obtained, the gravity further according to principle of moments by torque divided by object under test is treated
Survey the barycenter eccentric distance of object.But the object and actual barycenter that are inclined matter, are measurement is assembled of technical scheme measurement
Deviation distance, face where the specific barycenter of object can not be measured, therefore, how to realize for barycenter all at one
The object that runs at high speed on axial plane carries out centroid measurement, is current technical field of measurement and test technical problem urgently to be resolved hurrily.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of double knife edges lever center mass measuring device.
The utility model is achieved by the following technical programs.
A kind of double knife edges lever center mass measuring device that the utility model is provided, including mask and be arranged in mask
Centroid measurement instrument；The centroid measurement instrument includes crossbeam, bearing edge, working edge, pillar, joist and clamping device, described
Pillar and joist are successively set on below the crossbeam, and the upper end of the bearing edge is connected with crossbeam, and positioned at pillar and joist
Middle part, the lower end of the bearing edge is connected by projection screen with the bottom of mask, and pointer is provided with below bearing edge,
The working edge and clamping device are separately mounted to crossbeam two ends, and the lower end of the working edge is hung with scale by hanger
Disk, the projection screen is also associated with electronic scale with scale pan opposite side.
The clamping device includes clamping fixture seat, fixing port, movable plate and rotating handles, wherein, fixing port is fixed on fixture
Be located at fixing port both sides on the end face of seat, on clamping fixture seat and be respectively arranged with baffle plate, two baffle plates of the movable plate on clamping fixture seat it
Between, and realize that movable plate is moved on clamping fixture seat by rotating rotating handles.
The mask bottom is located at projection screen lower section and is provided with button, and tune screen bar is provided with button.
The mask bottom is provided with spiral pin positioned at button both sides, and is connected with feet in spiral underfooting side.
The scale pan top is provided with damper, and bottom is provided with pan arrest.
The clamping device is fixed on crossbeam by fixture fixing screws.
Working edge side is provided with balance screw on the crossbeam, and counterweight is provided with below balance screw
Hook.
The mask bottom is additionally provided with the transformer powered for projection screen.
A kind of method that object mass center is measured using above-mentioned double knife edges lever center mass measuring device, the measuring method is profit
With lever balance theory, accurate measurement is carried out to face where irregular object barycenter by selection standard block, so as to be conducive to hair
The installation of motivation blade, specific measuring method step is as follows：
(1) leveling measuring instrument：Start lever when unloaded after installing clamping device on measuring instrument, and by balance screw and
Increase allotment weight and be balanced regulation；
(2) measured object is weighed：Using electronic scale weighing and record measured object；
(3) regulation loads lever balance after measured object：Measured object is loaded into clamping device, box will be weighed and be placed on pan of a steelyard
On, and lead button is added in box to weighing, start lever right side and reach balance；
(4) measurement weighs the weight of box and lead button and records；
(5) by equalising torque formula calculation and measurement result.
The beneficial effects of the utility model are：
Compared with prior art, the utility model can realize the object of rotation at a high speed, and barycenter is all in an axial plane
On object mass center measure, such that it is able to reduce centrifugal force, reduce the difference of vibration frequency, strengthen properties of product, extension
Product service life, has great importance in improve product quality, the particularly installation of engine rotor blade shown.Using this
Centroid measurement instrument described in utility model not only can be with the barycenter of measurement rules object, it is also possible to measure the barycenter of irregularly shaped object
(Density inhomogeneity), the principle for utilizing is the principle of equalising torque, is marked with the barycenter of standard rule object using principle of moments
Quasi- zero point, the barycenter of testee is all compared with standardized centroid, and then measures testee offset criteria barycenter
Distance.Face where testee can accurately being measured；Barycenter concentric co-axial was not only ensured in an installation but also according to quality test
Reach the balance of quality.The utility model solves traceability, you can ratio property, you can different manufacturers are realized, between different batches
It is compared to each other.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation of clamping device in the utility model；
Fig. 3 is the structural representation of weighing box in the utility model；
Fig. 4 is the structural representation of the utility model Plays block A；
Fig. 5 is the structural representation of the utility model Plays block B；
Fig. 6 is the structural representation of the utility model Plays block C.
In figure：1- crossbeams, 2- balance screws, 3- hangers, 4- pointers, 5- bearing edges, 6- masks, 7- working edges, 8-
Pillar, 9- joists, 10- dampers, 11- projection screens, the 12- scales pan, 13- pan arrests, 14- spiral pin, 15- feets, 16- buttons, 17-
Screen bar, 18- clamping devices, 19- counterweights hook, 20- fixture fixing screws, 21- electronic scales, 22- transformers, 23- is adjusted to weigh box
Son, 24- lead buttons, 25- calibrated bolcks A, 26- calibrated bolck B, 27- calibrated bolck C, 181- clamping fixture seat, 182- fixing ports, 183- baffle plates,
184- movable plates, 185- rotating handleses.
Specific embodiment
Be described further below the technical solution of the utility model, but claimed scope be not limited to it is described.
As shown in Figure 1 and Figure 2, a kind of double knife edges lever center mass measuring device, including mask 6 and it is arranged in mask 6
Centroid measurement instrument；The centroid measurement instrument includes crossbeam 1, bearing edge 5, working edge 7, pillar 8, joist 9 and clamping device
18, the pillar 8 and joist 9 are successively set on the lower section of crossbeam 1, and the upper end of the bearing edge 5 is connected with crossbeam 1, and is located at
The middle part of pillar 8 and joist 9, the lower end of the bearing edge 5 is connected by projection screen 11 with the bottom of mask 6, and in support
The lower section of the edge of a knife 5 is provided with pointer 4, and the working edge 7 and clamping device 18 are separately mounted to the two ends of crossbeam 1, the work knife
The lower end of mouth 7 is hung with the scale pan 12 by hanger 3, and the projection screen 11 is also associated with electronic scale 21 with the opposite side of the scale pan 12.
The 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, baffle plate 183 be respectively arranged with positioned at the both sides of fixing port 182 on clamping fixture seat 181,
Movable plate 184 is located between two baffle plates 183 on clamping fixture seat 181, and realizes that movable plate 184 exists by rotating rotating handles 185
Moved on clamping fixture seat 181.Using the technical program, when in use, fixing port 182 is sleeved on the end of crossbeam 1 of measuring instrument, and
Tightened using fixture fixing screws 20, testee is then clipped in the baffle plate 183 and movable plate away from the one end of rotating handles 185
Between 184, testee is fixed by rotating handles 185.In actual applications, the quality of clamping device 18 will be required
As small as possible, the technical program is made clamping device 18 using titanium alloy or aluminium.
The bottom of the mask 6 is located at the lower section of projection screen 11 and is provided with button 16, and tune screen bar 17 is provided with button 16.
Projection screen 11 is adjusted by adjusting screen bar 17.
The bottom of the mask 6 is provided with spiral pin 14 positioned at the both sides of button 16, and is connected with feet below spiral pin 14
15.Mask 6 is supported by feet 15, due to being provided with spiral pin 14, the height of mask 6 can be adjusted, and energy
Ensure the degree of balance of mask 6.
The top of the scale pan 12 is provided with damper 10, and bottom is provided with pan arrest 13.
The 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 is dismantled.
The side of working edge 7 is provided with balance screw 2 on the crossbeam 1, and is provided with the lower section of balance screw 2
Counterweight hook 19.Using the technical program, the balance of crossbeam 1 can be adjusted by balancing screw 2,19 are linked up with by counterweight
Increase balancing weight to be tested, different size of balancing weight is selected according to different requirements.
The bottom of the mask 6 is additionally provided with the transformer 22 for the power supply of projection screen 11.
As shown in Figure 1, Figure 3, the utility model is the measuring instrument of double knife edges lever.The edge of a knife in the middle of wherein is support knife
Mouth 5, right side is working edge 7, and left side is the clamping device 18 for fixing measured object, is supported the use in the clamping device 18 design,
Clamping device 18 selects titanium alloy material, can be changed according to testee size.The right side scale pan 12 is measured to measured object
During place weigh box 23, be keep lever balance addition lead button 24, after lever balance use the weighing box of electronic balance 21
Son 23 and lead button 24 are weighed.Supported the use in the weighing box 23 design, can be selected according to testee quality size
Select.
As described in Fig. 1 to Fig. 6, a kind of side that object mass center is measured using above-mentioned double knife edges lever center mass measuring device
Method, the measuring method is to utilize lever balance theory, and face where irregular object barycenter is carried out accurately by selection standard block
Measurement, so as to be conducive to the installation of engine blade, specific measuring method step is as follows：
(1) leveling measuring instrument：Start lever when installing unloaded after clamping device 18 on measuring instrument, and by balancing screw
2 are balanced regulation with allotment weight is increased；
(2) measured object is weighed：Using electronic scale weighing and record measured object；
(3) regulation loads lever balance after measured object：Measured object is loaded into clamping device 18, box 23 will be weighed and be placed on
On pan of a steelyard 12, and lead button 24 is added in box 23 to weighing, start lever right side and reach balance；
(4) measurement weighs the weight of box 23 and lead button 24 and records；
(5) by 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 for being detected object is poor with standardized centroid constant, shows error concealment for standardized centroid.Standard rule object
Barycenter is easily measured, 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 using calibrated bolck to measuring instrument before measuring, to reach 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, three various sizes of calibrated bolcks be respectively calibrated bolck A25, calibrated bolck B26 and
Calibrated bolck C27, wherein calibrated bolck A25 are that length is 5cm, and width and height are the cuboid of 2cm；Calibrated bolck B26 is for length
10cm, width and height are the cuboid of 2cm；Calibrated bolck C27 is that length is 15cm, 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, it is preferential to make calibrated bolck from stainless steel material in the technical program.
The utility model centroid measurement instrument principle is as follows：
(1) unloaded trim is according to principle of moment balance：
Regulation lever balance, the principle according to equalising torque is obtained：
La×mLever is left=Lb×mLever is right；
(2) testee is placed on clamping device 18, when lever is balanced again, according to principle of moments phase Tongfang
To power produce torque 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：LbBe 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
Usual distance be in 11cm or so, can be L in designbAccurate to be calculated after being easy in 10cm, lever left end is provided with regulation
Screw, right-hand member does not set set screw, and m is the quality of addition, and M is the measured object quality being put into 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；
It is as follows to the survey calculation step of object mass center using the above method：
(1) normative reference 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 subtracted with the result of (2nd) step；That is (XQuilt+La)-(XMark+La)=XQuilt-XMark, it is possible to
To the barycenter of tested object mass center offset criteria object.In this continuous mode, X marks are definite values, and M is definite value, LbIt is set to
Might have minor variations during 10cm, adjustment, but the change of the value of L can influence the m counterweights of m counterweights, addition to be
mLb, because the result of measurement is the tested difference with standard, then when standardized centroid away from be definite value when, tested barycenter and mark
Quasi- barycenter difference is constant, error concealment.And during measuring instrument is adjusted, it is mutually authenticated using two calibrated bolcks, can be with
The variable quantity of L is calculated, when the change of L brings regulating error to measurement or variable quantity is brought into calculating, the change band of L can be eliminated
Error, it is proposed that the two standard block check measuring instruments close with testee length are used, with nearest with testee length
Calibrated bolck does survey mass.
The barycenter of standard rule object M is easily measured, (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 instruments) barycenter with testee
Away from difference value, you can obtain accurate barycenter.
Claims (8)
1. a kind of double knife edges lever center mass measuring device, including mask (6) and the centroid measurement instrument being arranged in mask (6),
It is characterized in that：The centroid measurement instrument includes crossbeam (1), bearing edge (5), working edge (7), pillar (8), joist (9)
With clamping device (18), the pillar (8) and joist (9) are successively set on crossbeam (1) lower section, the bearing edge (5) it is upper
End is connected with crossbeam (1), and positioned at pillar (8) and the middle part of joist (9), the lower end of the bearing edge (5) passes through projection screen
(11) bottom with mask (6) is connected, and bearing edge (5) lower section is provided with pointer (4), the working edge (7) and dress
Folder fixture (18) is separately mounted to crossbeam (1) two ends, and the lower end of the working edge (7) is hung with the scale pan by hanger (3)
(12), the projection screen (11) is also associated with electronic scale (21) with the scale pan (12) opposite side.
2. double knife edges lever center mass measuring device as claimed in claim 1, it is characterised in that：Clamping device (18) bag
Clamping fixture seat (181), fixing port (182), movable plate (184) and rotating handles (185) are included, wherein, fixing port (182) is fixed on folder
On the end face of tool seat (181), baffle plate (183), movable plate are respectively arranged with positioned at fixing port (182) both sides on clamping fixture seat (181)
(184) between two baffle plates (183) on clamping fixture seat (181), and movable plate is realized by rotating rotating handles (185)
(184) moved on clamping fixture seat (181).
3. double knife edges lever center mass measuring device as claimed in claim 1, it is characterised in that：Mask (6) the bottom position
Projection screen (11) lower section is provided with button (16), and tune screen bar (17) is installed on button (16).
4. double knife edges lever center mass measuring device as claimed in claim 1, it is characterised in that：Mask (6) the bottom position
Button (16) both sides are provided with spiral pin (14), and feet (15) is connected with spiral pin (14) lower section.
5. double knife edges lever center mass measuring device as claimed in claim 1, it is characterised in that：The scale pan (12) top sets
Damper (10) is equipped with, bottom is provided with pan arrest (13).
6. double knife edges lever center mass measuring device as claimed in claim 1, it is characterised in that：The clamping device (18) is led to
Fixture fixing screws (20) are crossed to be fixed on crossbeam (1).
7. double knife edges lever center mass measuring device as claimed in claim 1, it is characterised in that：It is located on the crossbeam (1)
Working edge (7) side is provided with balance screw (2), and counterweight hook (19) is provided with below balance screw (2).
8. double knife edges lever center mass measuring device as claimed in claim 1, it is characterised in that：Mask (6) bottom is also
It is provided with the transformer (22) for projection screen (11) power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621337196.4U CN206208453U (en) | 2016-12-07 | 2016-12-07 | A kind of double knife edges lever center mass measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621337196.4U CN206208453U (en) | 2016-12-07 | 2016-12-07 | A kind of double knife edges lever center mass measuring device |
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| Publication Number | Publication Date |
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| CN206208453U true CN206208453U (en) | 2017-05-31 |
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ID=58754276
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| CN201621337196.4U Active CN206208453U (en) | 2016-12-07 | 2016-12-07 | A kind of double knife edges lever center mass measuring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441708A (en) * | 2016-12-07 | 2017-02-22 | 贵州黎阳航空动力有限公司 | Double-blade lever type barycenter measuring device and measuring method thereof |
| CN109612634A (en) * | 2018-12-10 | 2019-04-12 | 河北汉光重工有限责任公司 | A kind of Symmetric Composite weight heart measuring device and measuring method |
-
2016
- 2016-12-07 CN CN201621337196.4U patent/CN206208453U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441708A (en) * | 2016-12-07 | 2017-02-22 | 贵州黎阳航空动力有限公司 | Double-blade lever type barycenter measuring device and measuring method thereof |
| CN109612634A (en) * | 2018-12-10 | 2019-04-12 | 河北汉光重工有限责任公司 | A kind of Symmetric Composite weight heart measuring device and measuring method |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 550014 No. 1111 Liyang Road, Baiyun District, Guiyang City, Guizhou Province Patentee after: Chinese Hangfa Guizhou Liyang aero Power Co. Ltd. Address before: 561102 Baiyun Town, Pingba County, Anshun City, Guizhou Province Patentee before: Guizhou Liyang Aerospace Power Co., Ltd. |
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| CP03 | Change of name, title or address |