CN108362613A - A kind of float element formula swimming cloths measuring device and its processing technology - Google Patents
A kind of float element formula swimming cloths measuring device and its processing technology Download PDFInfo
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- CN108362613A CN108362613A CN201810156709.9A CN201810156709A CN108362613A CN 108362613 A CN108362613 A CN 108362613A CN 201810156709 A CN201810156709 A CN 201810156709A CN 108362613 A CN108362613 A CN 108362613A
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- China
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- float element
- lower housing
- upper shell
- measuring device
- camber beam
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
Abstract
The present invention relates to a kind of float element formula swimming cloths measuring device and its processing technologys, including lower housing, the top of the lower housing connects upper shell by screw-thread fit, the upper shell is matched with lower housing is combined into T-shaped structure, and it is formed with cavity inside upper shell and lower housing, float element, the top of the float element and the either flush of upper shell are installed, the lower weld of the float element is in the bottom of lower housing in the cavity.Structure of the invention is compact, reasonable, easy to operate, by designing unique measuring device, can accurately install float element, ensures the precision measured, greatly improve functional reliability.
Description
Technical field
The present invention relates to technical field of manufacturing process, especially a kind of float element formula swimming cloths measuring device and its add
Work technique.
Background technology
Swimming cloths (wall shear stress) are one of the basic parameters for studying boundary layer flow, can be used for calculating friction resistance
Power judges to turn to twist, boundary layer separation and generation position etc. attached again.The accurate measurement of swimming cloths can be to be navigated by water in air and water
The profile optimization and reducing noise and drag of device provide important evidence, have important application value in aviation and navigation engineering.
Common swimming cloths measurement method has float element (friction balance) method, hot line/Thermomembrane method, general in engineering at present
Lin Sidun tube method, Stanton tube method and bottom baffle method etc..Wherein, float element method has the floating of certain elasticity by measuring
Sensing is realized in mechanically deform of the component structure under swimming cloths effect；Hot line/Thermomembrane method is based on swimming cloths and near-wall region
Relationship between forced-convection heat transfer realizes sensing by hot line/Hot-film measurements forced convertion heat dispersal situations；It manages Princeton
The relationship of method, Stanton tube method and bottom baffle method based on swimming cloths Yu region of interest pressure difference realizes sense by measuring pressure difference
It surveys.Compared to other measurement methods, float element method is a kind of direct measuring method, does not need prior stream field and does any vacation
If there is higher measurement accuracy for Complex Flows.
Float element formula swimming cloths measuring device is usually by measuring device ontology 4, float element ontology 5, measuring cell 6
Three parts are constituted, as shown in figure 3, wherein measuring device ontology 4 play fixed supporting role to float element ontology 5, Floating RMB
Part ontology 5 has certain elasticity, flexible deformation can occur under the action of swimming cloths, measuring cell 6 then measures float element
The flexible deformation of ontology 5, and then realize the measurement to swimming cloths.
Although float element formula swimming cloths measuring device, which measures Complex Flows, has some superiority, processing, system
Make and use but to have higher requirements.First, float element need to be aligned with surface to be measured, flushly mount with.Swimming cloths relative to around
Resistance is a small amount of caused by stream, if failing to realize alignment, flushly mounting with, swimming cloths signal will be streamed resistance signal and be flooded
Not yet, correct measurement is can not achieve, referring to attached drawing 4.Secondly as under swimming cloths effect elasticity can occur for float element ontology
Deformation, thus between float element ontology and surface to be measured need to there are gaps, and in order not to stream field generate larger interference, the gap
Usual very little.The minim gap is easy the obstructions such as the impurity, the molecule that are contained in fluid, needs frequent cleaning and dredging.
Float element formula swimming cloths measuring device in the prior art is typically integral type, i.e., main body, float element,
Measuring cell is fabricated to an inseparable entity, and float element can not be realized with surface to be measured by adjusting during follow-up use
Alignment.And when the minim gap between float element and surface to be measured is blocked by the impurity in fluid, it can not effective cleaning and dredging.
Invention content
The applicant is directed to the disadvantage in above-mentioned existing production technology, provides kind of a float element formula swimming cloths measuring device
Processing technology improve working efficiency to greatly improve process reliability, ensure yield rate.
The technical solution adopted in the present invention is as follows：
A kind of float element formula swimming cloths measuring device, including lower housing, the top of the lower housing are matched by screw thread
Connection upper shell is closed, the upper shell is matched with lower housing is combined into T-shaped structure, and is formed inside upper shell and lower housing
There is cavity, float element, the top of the float element and the either flush of upper shell, the Floating RMB are installed in the cavity
The lower weld of part is in the bottom of lower housing.
Its further technical solution is：
The structure of the float element is：Including circular end plate, the bottom of the end plate is welded with camber beam.
Upper shell is provided with counterbore at T-shaped structure at the top of it, and bottom is extended with boss, is set at the boss
It is equipped with external screw thread.
For lower housing at concave structure, upper inside wall face is provided with internal thread, and installation is provided among the bottom of lower housing
The both sides in hole, the mounting hole have cable hole.
A kind of processing technology of float element formula swimming cloths measuring device, including following operating procedure：
The first step：End plate and camber beam are processed respectively；
Second step：The end plate processed and camber beam are welded to connect, float element is formed；
Third walks：Process upper shell, and with lower housing junction threading；
5th step：The bottom of camber beam is welded in the mounting hole of lower housing；
6th step：On camber beam and foil gauge is pasted in the inside of lower housing, and is connected by conducting wire；
7th step：By upper shell and lower housing assembly connection, the position of float element is adjusted by accurate thread, makes floating
Element is concordant with the flange surface at the top of upper shell；
8th step：After the completion of assembly, using sealing glue by lower housing lower part cable hole, upper shell and lower housing junction
Seal.
Beneficial effects of the present invention are as follows：
Structure of the invention is compact, reasonable, easy to operate, can be by float element essence by designing unique measuring device
It really installs, ensures the precision measured, greatly improve functional reliability.
Measuring device of the present invention is integrally made of multiple independent parts, can be adjusted and be realized by accurate thread
The alignment of float element and surface to be measured；
The repeatable assembly of the parts of measuring device of the present invention, is readily disassembled cleaning and dredging in turn；
The present invention makes parts using accurate, ultraprecise mechanical processing technique, simple for process, high at flat rate.
Description of the drawings
Fig. 1 is the structural schematic diagram that float element formula mantle friction of the present invention hinders measuring device.
Fig. 2 is the full sectional view along Section A-A in Fig. 1.
Fig. 3 is the fundamental diagram of float element formula mantle friction device in the prior art.
Fig. 4 is the measuring device schematic diagram of float element misalignment state in the prior art.
Fig. 5 is the front view of float element of the present invention.
Fig. 6 is the side view of Fig. 5.
Fig. 7 is the vertical view of Fig. 5.
Fig. 8 is the structural schematic diagram of upper shell of the present invention.
Fig. 9 is the structural schematic diagram of lower housing of the present invention.
Figure 10 is the fundamental diagram that float element formula mantle friction of the present invention hinders measuring device.
Wherein：1, upper shell；2, float element；3, lower housing；301, mounting hole；302, cable hole；4, measuring device sheet
Body；5, float element ontology；6, measuring cell；7, end plate；8, camber beam；9, external screw thread；10, internal thread；11, foil gauge；12, it leads
Line.
Specific implementation mode
Below in conjunction with the accompanying drawings, illustrate the specific implementation mode of the present invention.
As shown in Fig. 1-Figure 10, the float element formula swimming cloths measuring device of the present embodiment, including lower housing 3, lower casing
The top of body 3 connects upper shell 1 by screw-thread fit, and upper shell 1 is matched with lower housing 3 is combined into T-shaped structure, and in upper casing
It is formed with cavity inside body 1 and lower housing 3, float element 2, the top surface at the top and upper shell 1 of float element 2 are installed in cavity
Concordantly, the lower weld of float element 2 is in the bottom of lower housing 3.
The structure of float element 2 is：Including circular end plate 7, the bottom of end plate 7 is welded with camber beam 8.
Upper shell 1 is provided with counterbore at T-shaped structure at the top of it, and bottom is extended with boss, is provided at boss
External screw thread 9.
For lower housing 3 at concave structure, upper inside wall face is provided with internal thread 10, is provided among the bottom of lower housing 3
The both sides of mounting hole 301, mounting hole 301 have cable hole 302.
The processing technology of the float element formula swimming cloths measuring device of the present embodiment, including following operating procedure：
The first step：End plate 7 and camber beam 8 are processed respectively；
Second step：The end plate 7 processed and camber beam 8 are welded to connect, float element 2 is formed；
Third walks：Process upper shell 1, and with 3 junction threading 9 of lower housing；
5th step：The bottom of camber beam 8 is welded in the mounting hole 301 of lower housing 3；
6th step：On camber beam 8 and foil gauge 11 is pasted in the inside of lower housing 3, and is connected by conducting wire 12；
7th step：By upper shell 1 and 3 assembly connection of lower housing, the position of float element 2 is adjusted by accurate thread, is made
Float element 2 is concordant with the flange surface at 1 top of upper shell；
8th step：After the completion of assembly, using sealing glue by 3 lower part cable hole 302 of lower housing, upper shell 1 and lower housing 3
Junction seals.
Float element of the present invention is made of end plate and camber beam two parts, referring to attached drawing 5, Fig. 6 and Fig. 7.
End carriage 7 is a circular sheet, diameter 9mm, thickness 0.2mm；
Camber beam 8 is a rectangular thin plate, long 34.8mm, wide 6mm, thick 0.2mm.
1 structure of upper shell is referring to attached drawing 8, internal diameter 8mm, outer diameter 12mm, flange outer diameter 20mm, high 25mm, thread away from
0.5mm, depth 0.5mm.
3 structure of lower housing is referring to attached drawing 9, and internal diameter 8mm, outer diameter 12mm, high 13mm, thread is away from 0.5mm, depth 0.5mm.
The material of upper shell 1, lower housing 3 and float element 2 is 316L stainless steels.
The specific production method and technological requirement of the present invention is as follows：
Step 1：End plate and camber beam are processed, and the two is connected using welding manner, forms float element.Desired size
Error is less than 1 μm, and angular error is less than 0.1 °；Position error is less than ± 1 μm；Any surface finish, impulse- free robustness.
Step 2：Upper shell is processed, and screw thread is being processed with lower housing junction, thread is away from 0.5mm, depth 0.5mm.
Desired size error is less than 1 μm, and angular error is less than 0.1 °；Position error is less than ± 1 μm；Any surface finish, impulse- free robustness.
Step 3：Lower housing is processed, and screw thread is being processed with upper shell junction, thread is away from 0.5mm, depth 0.5mm.
Desired size error is less than 1 μm, and angular error is less than 0.1 °；Position error is less than ± 1 μm；Any surface finish, impulse- free robustness.
Step 4：Camber beam is connect with lower housing by the way of welding.Desired size error is less than 1 μm, angular error
Less than 0.1 °；Position error is less than ± 1 μm；Any surface finish, impulse- free robustness.
Step 5：Foil gauge is pasted on camber beam and shell, is respectively used to the strain measurement and temperature-compensating of camber beam.It is required that
Scale error is less than 1 μm, and angular error is less than 0.1 °；Position error is less than ± 1 μm；Any surface finish.
Step 6：By upper shell and lower housing assembly connection, float element position is adjusted by accurate thread, makes Floating RMB
Part is concordant with upper shell flange surface.
Step 7：Lower housing lower part cable hole, upper-lower casing junction are sealed using sealing glue after the completion of assembly.
The float element formula swimming cloths measuring device to complete by above-mentioned steps needs first to carry out before actual use
Calibration, i.e., first (wall shear stress is it is known that such as flattened channel stream) carries out measurement in regular flow field, obtains output signal and wall surface
Relationship between shear stress --- calibration formula.In actual use, further according to calibration formula and actual measurement output signal, calculating obtains
Obtain wall shear stress measured value.
Swimming cloths measuring device integrated level of the present invention is high, can integrally be used as a construction module.In calibration or in fact
Border in wall surface corresponding position to be measured in use, need to only make and the matched stepped hole of module, you can pass through splicing or close-fitting
Mode complete to install.Since float element easily can be dismounted and be aligned by the accurate thread between upper and lower casing, both ensured
Installation and the precision measured, and greatly improve work efficiency the reliability with device.
The following problem of effective solution of the present invention：
One, the problem of float element is difficult to be aligned and then realizes correct measurement with surface to be measured；
Two, the easily minute impurities present in flow field of the minim gap between float element and surface to be measured are blocked, and are not easy clear
The problem of washing dredging；
Three, the problem that float element formula swimming cloths measuring device processing technology is complicated, yield rate is low.
Above description is explanation of the invention, is not the restriction to invention, limited range of the present invention is referring to right
It is required that within protection scope of the present invention, any type of modification can be made.
Claims (5)
1. a kind of float element formula swimming cloths measuring device, it is characterised in that：Including lower housing (3), the lower housing (3)
Top connects upper shell (1) by screw-thread fit, and the upper shell (1) is matched with lower housing (3) is combined into T-shaped structure, and
It is formed with cavity inside upper shell (1) and lower housing (3), float element (2), the float element are installed in the cavity
(2) either flush at top and upper shell (1), the bottom of the lower weld of the float element (2) in lower housing (3).
2. a kind of float element formula swimming cloths measuring device as described in claim 1, it is characterised in that：The float element
(2) structure is：Including circular end plate (7), the bottom of the end plate (7) is welded with camber beam (8).
3. a kind of float element formula swimming cloths measuring device as described in claim 1, it is characterised in that：Upper shell (1) at
T-shaped structure, and counterbore is provided at the top of it, bottom is extended with boss, and external screw thread (9) is provided at the boss.
4. a kind of float element formula swimming cloths measuring device as described in claim 1, it is characterised in that：Lower housing (3) at
Concave structure, upper inside wall face are provided with internal thread (10), mounting hole (301), institute are provided among the bottom of lower housing (3)
The both sides for stating mounting hole (301) have cable hole (302).
5. a kind of processing technology using float element formula swimming cloths measuring device described in claim 1, it is characterised in that：
Including following operating procedure：
The first step：Processing end plate (7) and camber beam (8) respectively；
Second step：The end plate processed (7) and camber beam (8) are welded to connect, composition float element (2)；
Third walks：Process upper shell (1), and with lower housing (3) junction threading (9)；
5th step：The bottom of camber beam (8) is welded in the mounting hole (301) of lower housing (3)；
6th step：On camber beam (8) and foil gauge (11) is pasted in the inside of lower housing (3), and is connected by conducting wire (12)；
7th step：By upper shell (1) and lower housing (3) assembly connection, the position of float element (2) is adjusted by accurate thread,
Keep float element (2) concordant with the flange surface at the top of upper shell (1)；
8th step：After the completion of assembly, using sealing glue by lower housing (3) lower part cable hole (302), upper shell (1) and lower casing
Body (3) junction seals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810156709.9A CN108362613A (en) | 2018-02-24 | 2018-02-24 | A kind of float element formula swimming cloths measuring device and its processing technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810156709.9A CN108362613A (en) | 2018-02-24 | 2018-02-24 | A kind of float element formula swimming cloths measuring device and its processing technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108362613A true CN108362613A (en) | 2018-08-03 |
Family
ID=63002418
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810156709.9A Pending CN108362613A (en) | 2018-02-24 | 2018-02-24 | A kind of float element formula swimming cloths measuring device and its processing technology |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2336018Y (en) * | 1998-10-14 | 1999-09-01 | 李纲 | Floor drain position adjusting device |
| US20100326200A1 (en) * | 2007-11-27 | 2010-12-30 | Sheverev Valery A | Shear Stress Measurement Apparatus |
| CN105784222A (en) * | 2016-05-06 | 2016-07-20 | 中国工程物理研究院电子工程研究所 | Bulk acoustic wave wall shear stress sensor |
| US20170146439A1 (en) * | 2015-11-20 | 2017-05-25 | The Regents Of The University Of California | Low profile shear-sensing unit |
| CN107202746A (en) * | 2017-06-29 | 2017-09-26 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of model surface frictional resistance measurement apparatus |
-
2018
- 2018-02-24 CN CN201810156709.9A patent/CN108362613A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2336018Y (en) * | 1998-10-14 | 1999-09-01 | 李纲 | Floor drain position adjusting device |
| US20100326200A1 (en) * | 2007-11-27 | 2010-12-30 | Sheverev Valery A | Shear Stress Measurement Apparatus |
| US20170146439A1 (en) * | 2015-11-20 | 2017-05-25 | The Regents Of The University Of California | Low profile shear-sensing unit |
| CN105784222A (en) * | 2016-05-06 | 2016-07-20 | 中国工程物理研究院电子工程研究所 | Bulk acoustic wave wall shear stress sensor |
| CN107202746A (en) * | 2017-06-29 | 2017-09-26 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of model surface frictional resistance measurement apparatus |
Non-Patent Citations (1)
| Title |
|---|
| 雷强 等: "MEMS壁面剪切应力传感器研究进展", 《中国测试》 * |
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Application publication date: 20180803 |
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