CN206832429U - A kind of balance resistance element structure of stress distribution optimization - Google Patents
A kind of balance resistance element structure of stress distribution optimization Download PDFInfo
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- CN206832429U CN206832429U CN201720652439.1U CN201720652439U CN206832429U CN 206832429 U CN206832429 U CN 206832429U CN 201720652439 U CN201720652439 U CN 201720652439U CN 206832429 U CN206832429 U CN 206832429U
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- segment
- resistance element
- branch bar
- mold segment
- stress distribution
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Abstract
The utility model discloses a kind of balance resistance element structure of stress distribution optimization, mold segment and branch bar segment including being L-shaped, the L-shaped of mold segment and the branch bar segment mutually agrees with the cylindrical structure to form an entirety, the mold segment is axially provided with M connected in stars, the branch bar segment is axially provided with V-arrangement tongue, the M connected in stars of the mold segment mutually agree with the V-arrangement tongue of branch bar segment, the mold segment and branch bar segment axially contact surface by being welded as a whole, the mold segment is formed and axially vertical groove with branch bar segment along being radially mutually not in contact with each other, axially the resistance element and dome array of iso-stress are symmetrically arranged with the mold segment in M connected in stars both sides；The utility model avoids balance structural stress concentration phenomenon, intensity and the fatigue life of balance are improved, improves the security of wind tunnel test, the utility model stress distribution homogenization, the bearing capacity and system stiffness of structure are improved, is advantageous to improve balance performance.
Description
Technical field
The invention belongs to Aero-Space dynamometer check aerodynamics force measurement technical field, especially multi -components, it is low impact, it is high-precision
When degree, big load drag measurement, using Optimal Structure Designing and technique for welding, improve balance resistance element and dome array
And the stress distribution on isolation channel, strength problem and fatigue problem that stress concentration is brought are avoided, improves strain balance in wind-tunnel
Overall performance in experiment.
Background technology
In force test in wind tunnel, the security of wind tunnel test, the overall performance of strain balance are always researcher pass
The problem of note.When especially low impact, high accuracy, big load drag measurement, balance measurement element particularly resistance element and bullet
Chip arrays and isolation channel easily produce larger stress concentration.Balance intensity deficiency or fatigue may be caused after lot of experiments is undergone
The problems such as failure.
Limited by design condition and processing method, general rod-type balance resistance element and dome array can not effectively be eliminated and answered
Power concentration phenomenon, isolation channel face skewed slot directly to be asymmetric, and skewed slot root easily produces larger stress, and serious structure is non-right
Title can cause larger stress gradient and thermograde, and the uncertainty of dynamometry signal is had adverse effect on, and is difficult to
Adopt an effective measure and be modified in the later stage works such as balance stickup, calibration.The dome array of some balances is each by changing
The thickness of group shell fragment can make the stress distribution of some component more uniform to a certain extent, but can not fundamentally solve multi -components
Serious Stress non-homogeneity problem caused by effect simultaneously.Especially surveyed in multi -components, low impact, high accuracy, big load resistance
During amount, this stress concentration phenomenon is particularly evident, and is difficult to eliminate.Not only increase balance design difficulty, and give wind-tunnel
Experiment brings huge potential safety hazard.
The content of the invention
The invention aims to the problem of stress concentration of strain balance resistance structure in wind tunnel test, there is provided Yi Zhongying
The balance resistance element structure and method of power distribution optimization, using Split type structure design optimization scheme, substep process and assemble, welding
The method of production of shaping, improve balance body stress distribution situation, improve balance safety and stability.
To achieve these goals, the technical solution adopted by the present invention is：
A kind of balance resistance element structure of stress distribution optimization, including be the mold segment and branch bar segment of L-shaped, the mould
The L-shaped of type section and branch bar segment mutually agrees with the cylindrical structure to form an entirety, and it is recessed that the mold segment is axially provided with M shapes
Groove, the branch bar segment are axially provided with V-arrangement tongue, the M connected in stars of the mold segment and the mutual contract of V-arrangement tongue of branch bar segment
Close, axially contact surface is by being welded as a whole with branch bar segment for the mold segment, and the mold segment is with branch bar segment along radially
Mutually be not in contact with each other form with axially vertical groove, being axially symmetrically arranged with M connected in stars both sides in the mold segment etc. should
The resistance element and dome array of power；
The method of balance resistance element distribution optimization, comprises the following steps：
The first step, according to specified load to balance resistance element structure carry out model end and strut ends split design with it is excellent
Change, by the streamlined design to sharp edge rounding and structure rounding off, reduce balance body stress gradient, design is suitable
Fixture；
Second step, processing model section, branch bar segment and fixture, wherein mold segment use finishing internal junction with branch bar segment respectively
Structure so that smooth including M connected in stars, V-arrangement tongue, each inner surface, mellow and full chamfering is realized smoothed between each face and face
Cross；
3rd step, assembling model section, branch bar segment and fixture, the connection of balance mold segment and branch bar segment is realized by welding；
4th step, finishing resistance element, dome array and positioned at the vertical of resistance element and dome array both ends
Groove.
In the above-mentioned technical solutions, the dome array takes out some continuous laminated structure structures by being drawn in mold segment
Into the resistance element is made up of the structure that taking-up is drawn in mold segment.
In the above-mentioned technical solutions, the dome array after digging is drawn in mold segment and resistance element is arranged in deep-slotted chip breaker,
Each described shell fragment is arcuate structure.
In the above-mentioned technical solutions, the spacing in several described laminated structures between two neighboring laminated structure, each
The size of individual laminated structure, thickness are unequal.
In the above-mentioned technical solutions, the resistance element is arranged in dome array, and the dome array is distributed in resistance
The both sides of element.
In the above-mentioned technical solutions, on two sides in the mold segment M connected in stars respectively along it is axially arranged have in
Groove, each inner groovy are adjacent with a dome array in mold segment.
In the above-mentioned technical solutions, a face of the inner groovy is arc.
In the above-mentioned technical solutions, both when the V-arrangement tongue of M connected in stars and branch bar segment mutually agrees with the mold segment it
Between be provided with space, space causes mold segment with not touched after branch bar segment deformation.
In the above-mentioned technical solutions, each edge of the M connected in stars and V-arrangement tongue is that arc structure avoids stress collection
In.
In the above-mentioned technical solutions, the cutting tip of described M ellbeams is located at mold segment, and length is less than mold segment overall length,
Section is not waited but seamlessly transitted, by setting fillet to avoid stress concentration.
In the above-mentioned technical solutions, the cutting tip of described V-beam is located at branch bar segment, and length is less than branch bar segment overall length,
Section is not waited but seamlessly transitted, by setting fillet to avoid stress concentration.
In the above-mentioned technical solutions, by least by two pieces of metal structures and at least two groups between mold segment and the branch bar segment
Turn into an entirety after solder side welding, described solder side is isometric rectangle plane.
The present invention operation principle be：It is excellent by structure uniform strength design based on the mechanics of materials, theory of elastic mechanics
Change the method that stress concentration is eliminated with rounding, reach the purpose of structure stress distribution optimization.Because described stress distribution is excellent
There is the isolation channel being mutually inserted in the balance resistance element inside configuration of change, it is difficult to overall processing, it is proposed that split is designed and welded
It is connected into the manufacturing process of type.In structure design, stress concentration is eliminated for the geometric catastrophe such as wedge angle, corner angle position rounding；
Round and smooth continuous variable cross section is used for the beam for bearing load so that structure stress distribution reaches unanimity, and is not in a certain portion
The excessive situation of position stress.The core concept of manufacturing process is that the internal insulation groove processing of complexity is decomposed into zero be easily worked
Part, accurate processing internal structure before welding, reprocesses external structure, the problem of avoiding welding deformation after welding.
In summary, by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
One is that of avoiding balance structural stress concentration phenomenon, improves intensity and the fatigue life of balance, improves wind-tunnel
The security of experiment.Second, balance structure stress distribution homogenizes, the bearing capacity and system stiffness of structure are improved, is advantageous to carry
High balance performance.Third, further increasing the flexibility of balance structure design by split design, be advantageous to performance and set
Meter advantage, reduces design difficulty.Fourth, the processing technology of welding fabrication solves balance resistance element processing problem, realize
The processing of complex internal structure.
Brief description of the drawings
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein：
Fig. 1 is the structure front view of the present invention；
Fig. 2 is Fig. 1 B-B sectional views；
Fig. 3 is Fig. 1 A-A sectional views；
Fig. 4 is the structural representation of the present invention；
Fig. 5 is the mold segment structural representation in the present invention；
Fig. 6 is Fig. 5 upward view；
Fig. 7 is the structural representation of the branch bar segment in the present invention；
Fig. 8 is Fig. 7 top view；
Fig. 9 is Fig. 7 left view
Figure 10 is the structural representation after clamping；
In figure：1. mold segment, 11.M ellbeams, 12. arc grooves, 13. outer arcuate grooves, 14. fillet A, 15. vertical channel A,
16. solder side A, 2. bar segments, 21.V ellbeams, 22. fillet B, 23. vertical channel B, 24. solder side B, 3. resistance elements, 4. bullets
Chip arrays, 41. oval grooves, 5. isolation channels, 6. fixtures.
Embodiment
All features disclosed in this specification, or disclosed all methods or during the step of, except mutually exclusive
Feature and/or step beyond, can combine in any way.
As shown in Figures 1 to 4, it is a kind of balance resistance element structural representation of stress distribution optimization of the invention；This
A kind of balance resistance element structure of the described stress distribution optimization of invention mainly includes mold segment 1, branch bar segment 2, resistance element
3, dome array 4 and isolation channel 5, described mold segment 1 only pass through described resistance element 3 and the phase of dome array 4 with branch bar segment 2
Even, inside configuration is provided with isolation channel 5；Described mold segment is provided with M ellbeams 11, arc groove 12, outer arcuate groove 13, institute
The branch bar segment stated is provided with V-beam 21；Described isolation channel 5 is formed by described M ellbeams 11 and the fusion of V-beam 21；It is described
Stress distribution optimization balance resistance element structure setting resistance element 3, dome array 4, M ellbeams 11, V-beam 21 and every
It is symmetrical on longitudinal center plane from groove 5.
Fig. 5, Fig. 6 are the mold segment schematic diagrames of the present invention, with reference to Fig. 1 to Fig. 4, the cutting tip position of described M ellbeams 11
In mold segment 1, section is in " M " shape, and length is less than the overall length of mold segment 1, and section is not waited but seamlessly transitted, by setting fillet A14
Avoid stress concentration；Described M ellbeams 11 are provided with arc groove 12, outer arcuate groove 13 and oval groove 41, should for formation etc.
The resistance element 3 and dome array 4 of power；End set vertical channel A15, for forming isolation channel 5；Two are provided with same water
The rectangular solder face A16 of plane.
Fig. 7, Fig. 8, Fig. 9 are the branch bar segment schematic diagrames of the present invention, with reference to Fig. 1 to Fig. 4, the cutting portion of described V-beam 21
Divide and be located at branch bar segment 2, section is in " V " shape, and length is less than the overall length of branch bar segment 2, and section is not waited but seamlessly transitted, by setting fillet
B22 avoids stress concentration；End set vertical channel B23, for forming isolation channel 5；It is provided with two squares in same level
Shape solder side B24.
Figure 10 is the assemble welding schematic diagram of the present invention.The described clip-model section 1 of fixture 6 and branch bar segment 2, for controlling
Welding deformation, and do not influence welding sequence.Described solder side B24 size is identical with solder side A16, same after assembling
Horizontal plane.
A kind of balance resistance element knot of stress distribution optimization of the present invention is further illustrated referring to Fig. 1-10
The embodiment of structure：
A kind of balance resistance element structure high strength elastic alloy steel material of described stress distribution optimization passes through certain
Step method design be process, by least by two pieces of metal structures and at least two bond pads faces welding after turn into one it is whole
Body.Described isolation channel 5 has a fixed gap, become under design load effect without sharp edge acute angle between M ellbeams 11 and V-beam 21
After shape mold segment will not be touched with branch bar segment.
Described fillet A14 and fillet B22 radius of curvature should be sufficiently large, otherwise can not effectively eliminate stress concentration.
Described fixture 6 is before being fixedly clamped, it is ensured that mold segment 1 and the mating surface of branch bar segment 2 are suitable, and especially its is same
The flatness of axle degree, contact surface, it is ensured that solder side A16 and solder side B24 contact reach more than 85%.To ensure to assemble matter
Amount, can also design other frocks and be aided in.
A kind of specific implementation step of the balance resistance element structural approach of the stress distribution optimization is：
The first step, according to specified load to balance resistance element structure carry out mold segment 1 and the split of branch bar segment 2 design with it is excellent
Change, by the streamlined design to sharp edge rounding and structure rounding off, make balance body stress gradient smaller, design is suitable
Fixture 6.When designing M ellbeams 11 and V-beam 21, the amplitude of changes of section vertically is determined according to balance design load.Typically
It is minimum in torque reference center section, and each section should be symmetrical with longitudinal center's platform and vertical center plane.M ellbeams 11 with
V-beam 21 may be designed as other multi-peaks structures, but its gap enough and should be mutually adapted, and must not be connect under any circumstance
Touch.
Second step, processing model section 1, branch bar segment 2 and fixture 3, wherein mold segment 1 finish inside with branch bar segment 2 respectively
Structure, including it is M ellbeams 11, arc groove 12, fillet A14, vertical channel A15, solder side A16, V-beam 21, fillet B22, vertical
Groove B23, solder side B24.Welding piece is processed by respective thickness, to adjust welding parameter.Preferentially, using electron-bombardment welding
Connect after equipment welded, structure can reach the weld strength of design requirement.
3rd step, assembling model section 1, branch bar segment 2 and fixture 3, by vacuum electron beam welding realize balance mold segment 1 with
The connection of branch bar segment 2.To ensure assembling quality, it is necessary to be detected to the axiality of mold segment in assembly 1 and branch bar segment 2,
Solder side A16 and solder side B24 flatness and contact area are detected.Need to carry out the hot place of structure progress after welding
Reason, welding stress is eliminated, and remove face of weld surplus.
4th step, finish resistance element 3, dome array 4, vertical channel A, vertical channel B and other external structures.Complete essence
Ageing Treatment is carried out to structure after processing, nondestructive inspection be carried out to welding position, it is ensured that welding quality.
Described vertical channel A15 and vertical channel B23 is process by second step and the 4th step respectively.
The internally positioned structure of described isolation channel 5 needs the accurate completion of processing before welding procedure is implemented, because welding
Internal structure can not be processed again after connecing.
The invention is not limited in foregoing embodiment.The present invention, which expands to, any in this manual to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (9)
1. a kind of balance resistance element structure of stress distribution optimization, including it is the mold segment and branch bar segment of L-shaped, the model
The L-shaped of section and branch bar segment mutually agrees with the structure to form an entirety, it is characterised in that：The mold segment is axially provided with
M connected in stars, the branch bar segment are axially provided with V-arrangement tongue, the M connected in stars of the mold segment and the V-arrangement tongue of branch bar segment
Mutually agree with, axially contact surface is by being welded as a whole with branch bar segment for the mold segment, the mold segment and branch bar segment edge
Radially mutually be not in contact with each other composition and axially vertical groove, is axially symmetrical arranged in the mold segment in M connected in stars both sides
There are the resistance element and dome array of iso-stress.
A kind of 2. balance resistance element structure of stress distribution optimization according to claim 1, it is characterised in that：The bullet
Chip arrays are formed by drawing some continuous laminated structures of taking-up in mold segment, and the resistance element in mold segment by drawing taking-up
Structure form, drawn in mold segment dig after dome array and resistance element be arranged in deep-slotted chip breaker, each described shell fragment
It is arcuate structure.
3. the balance resistance element structure of a kind of stress distribution optimization according to claim 2, it is characterised in that if described
Spacing, the size of each laminated structure in dry laminated structure between two neighboring laminated structure, thickness are unequal.
A kind of 4. balance resistance element structure of stress distribution optimization according to claim 2, it is characterised in that the resistance
Power element is arranged in dome array, and the dome array is distributed in the both sides of resistance element.
A kind of 5. balance resistance element structure of stress distribution optimization according to claim 1, it is characterised in that the mould
There is inner groovy respectively along axially arranged on two sides in type section M connected in stars, each inner groovy and one in mold segment
Individual dome array is adjacent.
6. the balance resistance element structure of a kind of stress distribution optimization according to claim 5, it is characterised in that in described
One face of groove is arc.
A kind of 7. balance resistance element structure of stress distribution optimization according to claim 1, it is characterised in that the mould
Space is provided with when M connected in stars and the V-arrangement tongue of branch bar segment mutually agree with type section between the two, space causes mold segment and branch
Do not touched after bar segment deformation.
A kind of 8. balance resistance element structure of stress distribution optimization according to claim 7, it is characterised in that the M shapes
Each edge of groove and V-arrangement tongue is that arc structure avoids stress concentration.
A kind of 9. balance resistance element structure of stress distribution optimization according to claim 1, it is characterised in that the mould
It is described by turning into an entirety after at least being welded by two pieces of metal structures and at least two bond pads faces between type Duan Yuzhi bar segments
Solder side is isometric rectangle plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720652439.1U CN206832429U (en) | 2017-06-07 | 2017-06-07 | A kind of balance resistance element structure of stress distribution optimization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720652439.1U CN206832429U (en) | 2017-06-07 | 2017-06-07 | A kind of balance resistance element structure of stress distribution optimization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206832429U true CN206832429U (en) | 2018-01-02 |
Family
ID=60774373
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720652439.1U Expired - Fee Related CN206832429U (en) | 2017-06-07 | 2017-06-07 | A kind of balance resistance element structure of stress distribution optimization |
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| Country | Link |
|---|---|
| CN (1) | CN206832429U (en) |
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2017
- 2017-06-07 CN CN201720652439.1U patent/CN206832429U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180102 |