CN103698073A - Device and method for testing fastening pressure of shape memory alloy pipe joint - Google Patents
Device and method for testing fastening pressure of shape memory alloy pipe joint Download PDFInfo
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- CN103698073A CN103698073A CN201310733618.4A CN201310733618A CN103698073A CN 103698073 A CN103698073 A CN 103698073A CN 201310733618 A CN201310733618 A CN 201310733618A CN 103698073 A CN103698073 A CN 103698073A
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- pipe joint
- fastening pressure
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- pressure
- loading blocks
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- 238000012360 testing method Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 13
- 229910001285 shape-memory alloy Inorganic materials 0.000 title abstract 3
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 26
- 239000010959 steel Substances 0.000 claims abstract description 26
- 239000011888 foil Substances 0.000 claims description 29
- 238000005259 measurement Methods 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 7
- 238000010998 test method Methods 0.000 claims description 7
- 230000003716 rejuvenation Effects 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract 1
- 238000011156 evaluation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a device and a method for testing thee fastening pressure of a shape memory alloy pipe joint. Two strain gauges are symmetrically adhered to the inner wall of a connected pipe and are connected with a dynamic strain tester. Four steel wire ropes penetrate through a groove of a loading block and fixed pulleys respectively, and weights are loaded at the tail ends of the steel wire ropes. Different pressures pi can be applied to the outer wall of the connected pipe by changing the weight of the loaded weights, and the strains epsilon i which are generated by the strain gauges adhered to the inner wall of the connected pipe under the action of the different pressures are tested through the dynamic strain tester, so that a curve of a calibration relation between the pressure p of the outer wall of the connected pipe and the strain epsilon of the inner wall is obtained. According to the calibration relation, the fastening pressure applied to the connected pipe by the shape memory alloy pipe joint in a heating recovery process can be conveniently tested.
Description
Technical field
The present invention relates to the test of marmem pipe joint fastening pressure, relate in particular to a kind of proving installation and method of testing thereof of marmem pipe joint fastening pressure.
Background technology
Airplane hydraulic pressure, traditional method of attachment pneumatic, fuel system are mainly enlarging connected mode, and this is extensive and the most ripe a kind of type of attachment.Yet this connected mode quality is heavy, complex structure, while being particularly connected with important load-carrying construction, larger to structural static strength and Fatigue Strength Effect, complex process, reliability is relative with security poor.At present, world's Advanced Aircraft is manufactured country and is extensively adopted marmem pipe joint without enlarging connected mode, and the fields such as China's Aeronautics and Astronautics, nuclear power have also started to adopt marmem pipe joint without enlarging connected mode.The pipeline connecting mode of this superior performance, the feature such as have not easy to leak, lightweight, installing space is little, replaces now widely used flared type to connect with it, can obviously strengthen reliability and the security of aircraft system.But fastening pressure how directly to measure marmem pipe joint it is not yet seen report, at present main by laboratory facilities such as " force of explosions " and " pulling-out force " indirectly, the fastening pressure of non-quantitationization ground estimation marmem pipe joint.This evaluation method operating cost is high, reliability is low, practicality is not strong.For the reliability of accurate evaluation marmem pipe joint without enlarging connected mode, engineering application is in the urgent need to a kind of apparatus and method that can directly measure marmem pipe joint fastening pressure.
Summary of the invention
A kind of proving installation and method of testing thereof of marmem pipe joint fastening pressure have been the object of the present invention is to provide.It can realize the direct measurement of the fastening pressure that marmem pipe joint pipeline connecting parts is produced in heating rejuvenation simply and easily.
The present invention is achieved like this: first by fastening pressure caliberating device, set up the outer wall pressure p of being taken over and the demarcation relation between inwall strain stress; Then utilize this demarcation relation, by fastening pressure proving installation, test the fastening pressure that marmem pipe joint produces in intensification rejuvenation.
Fastening pressure caliberating device comprises foil gauge, by adapter, arc steel plate, loading blocks, wire rope, pulley, bracing frame, add loads, dynamic strain measuring instrument and computing machine, it is characterized in that, by nozzle inner wall symmetry, posted foil gauge; Four arc steel plate equal altitudes, be close to and taken over outside surface equably, between adjacent arc steel plate, be provided with equidistant gap; Arc steel plate and loading blocks connect by being weldingly connected, and arc steel plate acts on equably and taken over outside surface for the power that loading blocks is passed over, and control position and the active area thereof of being taken over outside surface pressure; Loading blocks, for being transformed into the acting force to arc steel plate by adding loads, is applied a series of known pressure thereby realize to taking over outside surface; Each loading blocks is provided with the groove of four axles concentricity with it, is provided with the gap corresponding with arc steel plate interstitial site between loading blocks; Four wire rope are respectively through the groove of loading blocks, and every wire rope, respectively through after a pair of pulley, connects and adds loads at its end, and wherein the every pair of pulley symmetry is connected to the top of bracing frame.
Fastening pressure actual measurement device comprises by adapter, tested marmem pipe joint, foil gauge, dynamic strain measuring instrument and computing machine, it is characterized in that, by nozzle inner wall symmetry, posted foil gauge, the method for attaching of foil gauge is identical with the method for attaching in caliberating device.
The method of testing of described marmem pipe joint fastening pressure, is characterized in that, described method of testing comprises the following steps:
(1) taken over the foundation of demarcating relation between outer wall pressure p and inwall strain stress
A) according to structure described in claim 1, assemble caliberating device;
B) utilize caliberating device to be applied a series of known pressure pi to taking over;
C) test under different pressures effect by the corresponding strain stress of nozzle inner wall
i;
D) draw the demarcation relation curve of being taken between outer wall pressure p and inwall strain stress;
E) curve is carried out to matching, set up the functional relation p=f (ε) being taken between outer wall pressure p and inwall strain stress;
(2) test of marmem pipe joint fastening pressure
A) marmem pipe joint is enclosed within and is taken over by engineering matching requirements;
B) according to structure described in claim 1, assemble actual measurement device;
C) marmem pipe joint pipeline connecting parts being put into heated oven heats up;
D) test in temperature-rise period by nozzle inner wall strain stress
c, and be transferred to computing machine;
E) according to ε
c, by computing machine, utilize the funtcional relationship of p=f (ε) to calculate and demonstrate the fastening pressure that marmem pipe joint produces in intensification rejuvenation.
Technique effect of the present invention is: proving installation of the present invention is small and exquisite, easy to operate, and test data is reliably directly perceived, has realized the direct measurement to marmem pipe joint fastening pressure, has solved the difficult problem that cannot directly measure it at present.
Accompanying drawing explanation
Fig. 1 is fastening pressure caliberating device structural representation of the present invention.
Fig. 2 is by the structure vertical view of adapter, arc steel plate and loading blocks in Fig. 1.
Fig. 3 is the section of structure of B-B in Fig. 2.
Fig. 4 is the section of structure of A-A in Fig. 2.
Fig. 5 is taken over outer wall in caliberating device to be subject to inwall strain testing figure under known pressure p effect.
Fig. 6 is taken over the demarcation relation curve between outer wall pressure p and inwall strain stress.
Fig. 7 is fastening pressure actual measurement device schematic diagram.
In the drawings, 1, taken over 2, arc steel plate 3, loading blocks 4, wire rope 5, added loads 6, bracing frame 7, pulley 8, foil gauge 9, wire 10, dynamic strain measuring instrument 11, computing machine 12, marmem pipe joint.
Embodiment
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4 and Fig. 5, the demarcation relation of the fastening pressure the present invention relates to is set up and is achieved like this, it comprises is taken over 1, arc steel plate 2, loading blocks 3, wire rope 4, is added loads 5, bracing frame 6, pulley 7 and foil gauge 8.Taken over 1 inwall symmetry and posted foil gauge 8; Four arc steel plate 2 equal altitudes, be close to and taken over 1 periphery equably, between adjacent arc steel plate 2, be provided with equidistant gap; The periphery welding loading blocks 3 of arc steel plate 2, loading blocks, for being transformed into the acting force to arc steel plate by adding loads, is applied a series of known pressure thereby realize to taking over outside surface; Each loading blocks 3 is provided with the groove of four axles concentricity with it, is provided with the gap corresponding with arc steel plate 2 interstitial sites between loading blocks 3; Four wire rope 4 pass respectively the groove of loading blocks; Every wire rope 4, respectively through after a pair of pulley 7, connects and adds loads 5 at its end; Every pair of pulley 7 symmetries are connected to the top of bracing frame 6.Described bracing frame 6 is four; Described foil gauge 8 is two, and they are along being taken over 1 inwall equal altitudes, arranging equably; Described foil gauge 8 connects dynamic strain measuring instrument 10 by wire 9.
As shown in Figure 6, the actual measurement of the fastening pressure the present invention relates to is achieved like this, and it comprises by adapter 1, tested marmem pipe joint 12, foil gauge 8, dynamic strain measuring instrument 10 and computing machine 11.By nozzle inner wall symmetry, posted foil gauge 8, the method for attaching of foil gauge is identical with the method for attaching in caliberating device; Dynamic strain measuring instrument 10 connects computing machine 11.
1) by design processing and manufacturing as shown in Figure 1, Figure 2, Figure 3 and Figure 4, go out fastening pressure caliberating device, and assemble;
2) will be placed in caliberating device by adapter, be pasted two foil gauges by nozzle inner wall is symmetrical, foil gauge be connected with dynamic strain measuring instrument (seeing accompanying drawing 5);
3) four wire rope are passed after the groove and fixed block of loading blocks respectively, at its end, add loads (seeing accompanying drawing 1), the weight that adds loads by change realizes being applied different pressure p i by adapter outer wall;
4) utilize the test of dynamic strain measuring instrument to stick on by the strain stress that foil gauge produced of nozzle inner wall under different pressures effect
i;
5) by (p
i～ε
i) test data draws the demarcation relation curve (seeing accompanying drawing 6) of being taken between outer wall pressure p and inwall strain stress, and curve is carried out to matching, obtain by the functional relation p=f (ε) between adapter outer wall pressure p and inwall strain stress;
6) marmem pipe joint is enclosed within and is taken over by engineering matching requirements, by two foil gauges of the symmetrical stickup of nozzle inner wall, foil gauge is connected with dynamic strain measuring instrument, dynamic strain measuring instrument is connected with computing machine (seeing accompanying drawing 7), strain gauge adhesion mode and all identical with accompanying drawing 5 with dynamic strain measuring instrument connected mode;
7) marmem pipe joint pipeline connecting parts is put into heated oven and heat up, in temperature-rise period, by dynamic strain measuring instrument real-time testing, go out the strain stress being produced by nozzle inner wall foil gauge
cand be transferred to computing machine, by computing machine according to p=f (ε) funtcional relationship calculate and demonstrate marmem pipe joint in heating rejuvenation to being taken over the fastening pressure being produced.
Key of the present invention is to set up the demarcation relation of being taken between outer wall pressure p and inwall strain stress, and its technical scheme adopting is: will be placed in pressure applying means, as shown in Figure 1, Figure 2 and Figure 4 by adapter; Pasted two foil gauges by nozzle inner wall is symmetrical, the foil gauge (see figure 5) that is connected with dynamic strain measuring instrument; Four wire rope, respectively through after the groove and fixed block of loading blocks, add loads at its end, and the weight that adds loads by change realizes being applied different pressure p i by adapter outer wall; Utilize the test of dynamic strain measuring instrument to stick on by the strain stress that foil gauge produced of nozzle inner wall under different pressures effect
ithereby, obtain the demarcation relation curve (seeing accompanying drawing 6) of being taken between outer wall pressure p and inwall strain stress.Utilize this demarcation relation, can test out easily marmem pipe joint in heating rejuvenation to being taken over the fastening pressure (see figure 7) produced.
Claims (6)
1. marmem pipe joint fastening pressure proving installation and a method of testing thereof, it comprises fastening pressure caliberating device and fastening pressure actual measurement device.Fastening pressure caliberating device comprises foil gauge, by adapter, arc steel plate, loading blocks, wire rope, pulley, bracing frame, add loads, dynamic strain measuring instrument and computing machine, it is characterized in that, by nozzle inner wall symmetry, posted foil gauge; Four arc steel plate equal altitudes, be close to and taken over outside surface equably, between adjacent arc steel plate, be provided with equidistant gap; Arc steel plate and loading blocks connect by being weldingly connected, and arc steel plate acts on equably and taken over outside surface for the power that loading blocks is passed over, and control position and the active area thereof of being taken over outside surface pressure; Loading blocks, for being transformed into the acting force to arc steel plate by adding loads, is applied a series of known pressure thereby realize to taking over outside surface; Each loading blocks is provided with the groove of four axles concentricity with it, is provided with the gap corresponding with arc steel plate interstitial site between loading blocks; Four wire rope are respectively through the groove of loading blocks, and every wire rope, respectively through after a pair of pulley, connects and adds loads at its end, and wherein the every pair of pulley symmetry is connected to the top of bracing frame.Fastening pressure actual measurement device comprises by adapter, tested marmem pipe joint, foil gauge, dynamic strain measuring instrument and computing machine, it is characterized in that, by nozzle inner wall symmetry, posted foil gauge, the method for attaching of foil gauge is identical with the method for attaching in caliberating device.
2. the caliberating device of a kind of marmem pipe joint fastening pressure as claimed in claim 1, is characterized in that, described loading blocks and bracing frame are four, and in each loading blocks, all has four grooves.
3. the caliberating device of a kind of marmem pipe joint fastening pressure as claimed in claim 1, is characterized in that, described foil gauge is two, they along by nozzle inner wall circumference to all arranging.
4. the proving installation of a kind of marmem pipe joint fastening pressure as described in claim 1 or 3 (comprise caliberating device and actual measurement device), it is characterized in that, described foil gauge connects dynamic strain measuring instrument by wire, and dynamic strain measuring instrument connects computing machine.
5. the caliberating device of a kind of marmem pipe joint fastening pressure as claimed in claim 1, it is characterized in that, loading blocks is for being transformed into the acting force to arc steel plate by adding loads, and arc steel plate acts on equably and taken over outside surface for the power that loading blocks is passed over.
6. the method for testing of marmem pipe joint fastening pressure proving installation as claimed in claim 1, is characterized in that, described method of testing comprises the following steps:
(1) taken over the foundation of demarcating relation between outer wall pressure p and inwall strain stress
A) according to structure described in claim 1, assemble caliberating device;
B) utilize caliberating device to be applied a series of known pressure pi to taking over;
C) test under different pressures effect by the corresponding strain stress of nozzle inner wall
i;
D) draw the demarcation relation curve of being taken between outer wall pressure p and inwall strain stress;
E) curve is carried out to matching, set up the functional relation p=f (ε) being taken between outer wall pressure p and inwall strain stress;
(2) test of marmem pipe joint fastening pressure
A) marmem pipe joint is enclosed within and is taken over by engineering matching requirements;
B) according to structure described in claim 1, assemble actual measurement device;
C) marmem pipe joint pipeline connecting parts being put into heated oven heats up;
D) test in temperature-rise period by nozzle inner wall strain stress
c, and be transferred to computing machine;
E) according to ε
c, by computing machine, utilize the funtcional relationship of p=f (ε) to calculate and demonstrate the fastening pressure that marmem pipe joint produces in intensification rejuvenation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310733618.4A CN103698073B (en) | 2013-12-27 | 2013-12-27 | A kind of marmem pipe joint fastening pressure test device and method of testing thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310733618.4A CN103698073B (en) | 2013-12-27 | 2013-12-27 | A kind of marmem pipe joint fastening pressure test device and method of testing thereof |
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| Publication Number | Publication Date |
|---|---|
| CN103698073A true CN103698073A (en) | 2014-04-02 |
| CN103698073B CN103698073B (en) | 2016-07-27 |
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|---|---|---|---|
| CN201310733618.4A Expired - Fee Related CN103698073B (en) | 2013-12-27 | 2013-12-27 | A kind of marmem pipe joint fastening pressure test device and method of testing thereof |
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| CN (1) | CN103698073B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067251A (en) * | 2015-08-19 | 2015-11-18 | 中国航空工业集团公司西安飞机设计研究所 | Low-temperature failure detector for titanium-nickel-iron memory alloy joint |
| CN105628268A (en) * | 2015-12-22 | 2016-06-01 | 福建联迪商用设备有限公司 | System and method of testing POS equipment safety contact pressure |
| CN110426146A (en) * | 2019-07-16 | 2019-11-08 | 西安建筑科技大学 | A kind of heating device for marmem constraint restoring force test |
| CN110631816A (en) * | 2019-10-08 | 2019-12-31 | 重庆凰圆汽车饰件有限公司 | Be used for car bumper intensity check out test set |
| CN113375848A (en) * | 2021-06-08 | 2021-09-10 | 哈尔滨工业大学 | Soil pressure gauge based on shape memory polymer supports |
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2013
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067251A (en) * | 2015-08-19 | 2015-11-18 | 中国航空工业集团公司西安飞机设计研究所 | Low-temperature failure detector for titanium-nickel-iron memory alloy joint |
| CN105628268A (en) * | 2015-12-22 | 2016-06-01 | 福建联迪商用设备有限公司 | System and method of testing POS equipment safety contact pressure |
| CN105628268B (en) * | 2015-12-22 | 2018-08-14 | 福建联迪商用设备有限公司 | POS machine safety contact pressure testing system and test method |
| CN110426146A (en) * | 2019-07-16 | 2019-11-08 | 西安建筑科技大学 | A kind of heating device for marmem constraint restoring force test |
| CN110631816A (en) * | 2019-10-08 | 2019-12-31 | 重庆凰圆汽车饰件有限公司 | Be used for car bumper intensity check out test set |
| CN113375848A (en) * | 2021-06-08 | 2021-09-10 | 哈尔滨工业大学 | Soil pressure gauge based on shape memory polymer supports |
| CN113375848B (en) * | 2021-06-08 | 2023-03-21 | 哈尔滨工业大学 | Soil pressure gauge based on shape memory polymer supports |
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| Publication number | Publication date |
|---|---|
| CN103698073B (en) | 2016-07-27 |
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