CN102288481A - Vacuumizing loading equipment and test method thereof - Google Patents
Vacuumizing loading equipment and test method thereof Download PDFInfo
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- CN102288481A CN102288481A CN2011101942092A CN201110194209A CN102288481A CN 102288481 A CN102288481 A CN 102288481A CN 2011101942092 A CN2011101942092 A CN 2011101942092A CN 201110194209 A CN201110194209 A CN 201110194209A CN 102288481 A CN102288481 A CN 102288481A
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Abstract
The invention belongs to an airtight loading technology and relates to airtight load test loading equipment and an airtight load test loading method for a reinforced wall plate of an airplane. Vacuumizing loading equipment comprises a rubber block, a sealing block, a supporting box and a sealing box, wherein the rubber block is adhered to a skin edge on one surface of a long girder of the wall plate and flushed with bosses at two ends of the wall plate; the sealing block is adhered to the rubber block and a floor beam; the supporting box is adhered to the inside of the rubber block; a fixing bolt which is used for fixing the supporting box is arranged at the top of the supporting box; the sealing box is in adhered connection with the rubber block and sleeve outside the supporting box; and a hole and an opening, which correspond to the supporting box, are reserved in the sealing box. The invention has the advantages that: during test of the supporting box, the skin of the wall plate cannot be deformed through isolation of the rubber block; because the own rigidity of the rubber block is quite low, requirements of only application of an airtight load without change of boundary conditions of the wall plate can be met; and the reliability and stability of loading test and the accuracy of a test result are guaranteed.
Description
Technical field
The invention belongs to airtight load loading technique, relate to a kind of airtight load test loading equipemtn and loading method thereof of aircraft reinforcement wallboard.
Background technology
Aircraft load load test is an important topic of strength of aircraft test, when detecting aircraft central wing intensity, must carry out the load load test especially.See also Fig. 1, it is the synoptic diagram of prior art central wing wainscot structure and load thereof.The central wing wainscot 100 of certain type civil aircraft comprises covering 101, long purlin 102, boss 103 and joist 104.Wherein, covering 101 is arranged on the long purlin 102, becomes wall panel structure, bears the supercharging load 106 in compressive load 105 and main cabin, and it is provided with boss 103 and joist 104 respectively in both sides up and down.Wherein, boss 103 guarantees that axial compression load 105 is applied on the centre of form of wallboard, and all the other areas except that boss 103 are subjected to supercharging load 106.
The wing reinforcement wallboard of considering supercharging load compresses the actual stand under load that stability test can be simulated the central wing wainscot more realistically.But supercharging load applies with the inflation mode, and the interference because of the test of joist overhanging end place is supported makes the inflation mode to implement.
In order to address this problem, must there be the one side of long purlin to adopt the mode that vacuumizes at wallboard, realize that supercharging load loads.Requirement to vacuum box is: can not influence the loading of compressive load at the two ends of wallboard; Can not hinder the side direction Free Transform of wallboard in the centre of wallboard; Can not produce the normal direction support of covering at the side of wallboard; The acting force that produces around the vacuum box can not be passed to wallboard.
Carry out the NASA of an example of airtight load load test with vacuum box in the U.S..R.G.Pettit etc. have introduced the test that fuselage reinforcement wallboard is loaded airtight load with vacuum box in being numbered the document of NASA/CR-2000-209342 " Validated Feasibility Study of Integrally Stiffened Metallic Fuselage Panels for Reducing Manufacturing Costs ".Vacuum box contacts with fuselage wallboard covering in this test, when vacuumizing, vacuum box is subjected to the external pressure that the inner and outer air pressure difference produces, this pressure by around the vacuum box with the contact action of wallboard covering to covering, thereby fuselage wallboard covering produced acting force; Vacuum box provides the normal direction support to border around the fuselage wallboard covering simultaneously, thereby has changed the boundary condition of wallboard.The technology of this test is because vacuum box to the reason that the wallboard border provides normal direction support and vacuum box acting force to be passed to wallboard all around, can't satisfy the requirement of central wing wainscot compression stability test.
Summary of the invention
Purpose of the present invention: the invention provides a kind of reliable and stable, to wallboard influence little vacuumize loading equipemtn.
In addition, the present invention also provides a kind of load test method that vacuumizes.
Technical scheme of the present invention is: a kind of loading equipemtn that vacuumizes, it comprises block rubber, sealing block, supporting case, seal box, described block rubber sticks on the covering edge of the long purlin of wallboard one side, its boss with the wallboard two ends is concordant, described sealing gasket is bonded on block rubber and the joist, described supporting case is pasting the inboard of block rubber and is placing, and the supporting case top is provided with to be used for fixing supports horizontal set bolt, seal box and block rubber are bonding, and be enclosed within the supporting case outside, and leave on the seal box and corresponding perforate of supporting case and opening.
Described supporting case opening is disposed with rubber ring, steel trim ring and poly (methyl methacrylate) plate from inside to outside and fixes by set bolt.
There are two transversal reinforcements and two vertical reinforcements in supporting case inside.
The length of supporting case is than the little 10mm of inner length of seal box, prevents wallboard pressurized shorten back supporting case and wallboard interference.
Supporting case is a steel design, is supported by four contour cushion blocks.
A kind of load test method that vacuumizes, it comprises the steps:
Step 1: the steel supporting case is placed into the block rubber inboard, supports that with cushion block itself and wallboard covering are kept at a distance, block rubber is sticked with glue the covering edge that agent bonds to the long purlin of reinforcement wallboard one side, make block rubber concordant with boss;
Step 2: sealing gasket is bonded on block rubber and the boss;
Step 3: seal box is enclosed within on the steel supporting case, then the rubber box is bonded on the sealing gasket;
Step 4: the foil gauge slotted line of the long purlin of wallboard one side is sealed through line outlet is drawn after inside and outside the line outlet, again bleed interface, intake interface and sensor interface of installation;
Step 5: successively rubber ring, poly (methyl methacrylate) plate, rubber ring and steel trim ring are installed to the opening part on the seal box,, seal this opening, nut is installed on the set bolt perforate of sealing and fixing bolt with the fastening steel trim ring of nut;
Step 6: the testpieces after sealing finished is cured, after curing is finished, on the interface of bleeding, connect exhaust tube, at venting interface mounting ball valve, and close this valve, at sensor interface setting pressure sensor, in the face of being evacuated down to maximum airtight load, testpieces carries out airtight test on ground, airtight inspection is slowly opened ball valve and is exitted to testpieces after finishing, and closes ball valve again after finishing venting.
Step 7: with vertical together being installed on the compression test of part of testpieces and above-mentioned steps installation, be connected to supporting case on the column that is fixed in ground through set bolt, swivel nut, screw rod again, open rectangular aperture then and take out four cushion blocks, reinstall rubber ring, poly (methyl methacrylate) plate, rubber ring and steel trim ring, finish sealing, at last the foil gauge slotted line is connected with measuring equipment rectangular aperture;
Step 8: during test, earlier wallboard is applied airtight load, be evacuated down to peak suction, keep air pressure constant, then wallboard is applied compressive load, up to the wallboard unstable failure, in the process of the test, the strain measurement value of recording compressed load, airtight load and structure.
Beneficial effect of the present invention: steel supporting case of the present invention at the trial, because the isolation of block rubber, leave 40 millimeters of wallboards, therefore do not influence the distortion of wallboard, and the rigidity of block rubber own is very little, does not increase the rigidity of wallboard, thereby can satisfy the requirement that only adds airtight load and do not change the boundary condition of wallboard, the pressure that vacuum box is subjected to when especially not having to vacuumize is passed to wallboard by around the box again, thereby has guaranteed the reliability and stability of load test and the precision of test findings.
Description of drawings
Fig. 1 is the synoptic diagram of prior art central wing wainscot structure and load thereof;
Fig. 2 is the front view that the present invention vacuumizes loading equipemtn one better embodiment;
Fig. 3 is the A-A cut-open view among Fig. 2;
Fig. 4 is the vertical view of Fig. 2;
Status of support synoptic diagram when Fig. 5 is the vacuum box test,
Wherein, 100-central wing wainscot, 101-covering, the long purlin of 102-, the 103-boss, 104-joist, 105-compressive load, the airtight load of 106-, the 201-block rubber, 202-rubber gasket, 300-supporting case, 301-set bolt, 302 M10 bolts, 303-transversal reinforcement, the vertical reinforcement of 304-, 305-cushion block, 400-seal box, 501-sensor interface, 502-line outlet, the 503-interface of bleeding, the 504-interface of exitting, 505-rubber ring, 506-poly (methyl methacrylate) plate, 507-steel trim ring.
Embodiment
The present invention is described in further detail below by embodiment:
Please consult Fig. 2, Fig. 3 and Fig. 4 simultaneously, wherein, Fig. 2 is the structural representation that the present invention vacuumizes loading equipemtn one better embodiment, and Fig. 3 is the A-A cut-open view of Fig. 2, and Fig. 4 is the vertical view of Fig. 2.This vacuumizes loading equipemtn and is mainly the vacuum box that is assemblied on the central wing wainscot, and it comprises block rubber 201, sealing gasket 202, supporting case 300, seal box 400, cushion block 305, rubber ring 505, poly (methyl methacrylate) plate 506, steel trim ring 507, sensor interface 501, line outlet 502, bleed interface 503 and intake interface 504.
Wherein, (40mm * 47.5mm) stick on covering 101 edges simultaneously, the long purlin of wallboard is the vital part of vacuum load equipment to two rectangular rubber pieces 201.Described block rubber 201 is concordant with the boss 103 at wallboard two ends, and the thick rubber gasket 202 of 2mm is bonded on block rubber 201 and the joist 104, is convenient to sealing, and is air tight to guarantee the sealing between seal box 400 and the central wing wainscot 100.Described block rubber 201 does not increase the rigidity on wallboard border, therefore can not increase the axial load carrying capacity 105 of central wing wainscot 100.In addition, the bonding area that has reduced airtight load 106 of block rubber 201, but this result is an acceptable on the engineering.Simultaneously, block rubber 201 can avoid the rubber box directly to be bonded on the covering, and its lateral pressure that is subjected to is by steel supporting case sidewall balance, thereby covering is not produced bending load.
Supporting case 300 is a steel design, and place the inboard that nestles up two block rubbers 201, supports with four contour cushion blocks 305 during installation.Rectangular aperture through supporting case 300 middle parts before test takes out four cushion blocks 305, and the Free Transform during with assurance wallboard pressurized is not subjected to the influence of supporting case 300.
There are two transversal reinforcements 303 and two vertical reinforcements 304 in supporting case 300 inside, to strengthen the rigidity of supporting case; 4 perforates are left in both sides, are used for outlet and sensor installation interface 501, bleed interface 503 and intake interface 504.The height of supporting case is 100mm, is convenient to install each interface, and supporting case 300 above be provided with two set bolts 301 that are used to be connected and fixed supporting case, be the M36 bolt in the present embodiment.Be disposed with rubber ring 505, steel trim ring 507 and poly (methyl methacrylate) plate 506 from inside to outside around the rectangular aperture of supporting case 300, and 12 M10 bolts 302 that are used to mount and dismount above-mentioned rubber ring 505, steel trim ring 507 and poly (methyl methacrylate) plate 506.
Be bonded with seal box 400 on the block rubber 201, in the present embodiment, the sealing box is the thick rubber box of 10mm that rubber slab is made, and is used to keep vacuum state.Seal box 400 is enclosed within supporting case 300 outsides, and supporting case 300 supports seal boxes 400, prevents that it from being inhaled flat when vacuumizing.The length of supporting case 300 is than the little 10mm of inner length of seal box 400, prevents that the wallboard pressurized back supporting case 300 that shortens from interfering with wallboard.And leave on the seal box 400 and supporting case 300 corresponding perforate and openings.
After seal box 400 bonding the finishing, the foil gauge slotted line of the long purlin of wallboard one side through drawing after, line outlet 502 is sealed inside and outside the line outlet 502, again bleed interface 503, intake interface 504 and sensor interface 501 of installation.
See also Fig. 5, status of support synoptic diagram when it is the vacuum box test.During real work, wallboard and vacuum box thereof be installed to compression test after, supporting case 300 is connected on the column 603 that is fixed in ground through two M36 bolts, swivel nut 601, screw rod 602.Take out four cushion blocks 305 then, poly (methyl methacrylate) plate 506, rubber ring 505 and steel trim ring 507 are installed are again finished sealing supporting case.
Provide the detailed process that the present invention vacuumizes the load test method, its step is as follows,
Step 1: steel supporting case 300 is placed into design attitude, supports the distance that makes itself and wallboard covering keep 40mm with cushion block 305, with guarantee block rubber 201 bonding after not with the both sides interference of supporting case 300 and the Free Transform on covering 101 borders.Block rubber 201 is sticked with glue covering 101 edges that agent bonds to reinforcement wallboard 100 long purlin one sides, make block rubber 201 concordant, as shown in Figure 3 with boss 103.
Step 2: rubber gasket 202 is bonded on block rubber 201 and the boss 103.
Step 3: seal box 400 is enclosed within on the steel supporting case 300, then the rubber box is bonded on the rubber gasket 202.The bonding plane that should guarantee seal box 400 when bonding is open and flat, to guarantee the sealing of bonding plane.
Step 4: the foil gauge slotted line of the long purlin of wallboard one side is sealed through line outlet 502 is drawn after inside and outside the line outlet 502, again bleed interface 503, intake interface 504 and sensor interface 501 of installation.
Step 5: successively rubber ring 505, poly (methyl methacrylate) plate 506, rubber ring 505 and steel trim ring 507 are installed to the rectangular aperture place on the seal box 400,, seal this rectangular aperture with the fastening steel trim ring 507 of nut.Nut is installed on two M36 bolts the perforate of sealing and fixing bolt 301.Testpieces after sealing finished is placed on room temperature environment and carried out normal temperature cure in 72 hours.
Step 6: after curing is finished, on the interface 503 of bleeding, connect exhaust tube,, and close this valve at venting interface 504 mounting ball valves, at sensor interface setting pressure sensor, in the face of being evacuated down to maximum airtight load-0.88MPa, testpieces carries out airtight test on ground.As find gas leakage, and outside leak stopping sealing is carried out with fluid sealant in the gas leakage position, reach air tight state until testpieces.Airtight inspection is slowly opened ball valve and is exitted to testpieces after finishing, and closes ball valve again after finishing venting.
Step 7: with vertical together being installed on the compression test of all parts of testpieces 100 and above-mentioned steps installation, state as shown in Figure 5.Again supporting case 300 is connected on the column 603 that is fixed in ground through two M36 bolts, swivel nut 601, screw rod 602.Open rectangular aperture then and take out four cushion blocks 305, reinstall rubber ring 505, poly (methyl methacrylate) plate 506, rubber ring 505 and steel trim ring 507, finish sealing rectangular aperture.At last the foil gauge slotted line is connected with measuring equipment.
Step 8: during test, earlier wallboard is applied airtight load 106, be evacuated down to peak suction-0.88MPa, keep air pressure constant, then wallboard is applied compressive load 106, up to the wallboard unstable failure.In the process of the test, the strain measurement value of the automatic recording compressed load of computing machine, airtight load and structure.
It mainly is by block rubber 201, supporting case 300 that the present invention satisfies the requirement only add airtight load and not change the boundary condition of wallboard, and seal box 400 is realized.And cushion block 305, venting interface 503, rubber ring 505, poly (methyl methacrylate) plate 506, steel trim ring 507 be install to need subsidiary.Particularly wherein, block rubber 201, this part have 3 each and every one functions: 1 level up the boss height that covering arrives, and is convenient to sealing; 2 itself do not increase the rigidity of covering, thereby do not increase the load-bearing capacity of wallboard; 3 its lateral pressures that are subjected to are by steel supporting case sidewall balance, thereby covering are not produced bending load.
In the stability test of the present invention under certain aircraft central wing reinforcement wallboard axial compression and airtight load, be evacuated down to-keep-up pressure behind the 0.88MPa constant, load axial compression load, up to the wallboard unstable failure.The test pressure test result shows, the sealing method testpieces that can keep-up pressure destroys just and leaks gas, and sealing effectiveness is reliable and stable.Because the steel supporting case leaves 40 millimeters of wallboards (isolation of block rubber) at the trial, therefore do not influence the distortion of wallboard, the rigidity of block rubber own is very little, do not increase the rigidity of wallboard, thereby can satisfy the requirement that only adds airtight load and do not change the boundary condition of wallboard, the pressure that vacuum box is subjected to when especially not having to vacuumize is passed to wallboard by around the box again, has guaranteed the reliability and stability of test findings.
Claims (6)
1. one kind vacuumizes loading equipemtn, it is characterized in that: comprise block rubber [201], sealing block [202], supporting case [300], seal box [400], described block rubber [201] sticks on the covering edge of the long purlin of wallboard one side, its boss [103] with the wallboard two ends is concordant, described sealing gasket [202] is bonded on block rubber [201] and the joist [104], described supporting case [300] is pasting the inboard of block rubber [201] and is placing, and the supporting case top is provided with to be used for fixing supports horizontal set bolt, seal box [400] is bonding with block rubber [201], and be enclosed within supporting case [300] outside, and leave on the seal box [400] and corresponding perforate of supporting case [300] and opening.
2. the loading equipemtn that vacuumizes according to claim 1 is characterized in that: described supporting case [300] opening is disposed with rubber ring [505], steel trim ring [507] and poly (methyl methacrylate) plate [506] from inside to outside and fixes by set bolt.
3. the loading equipemtn that vacuumizes according to claim 2 is characterized in that: there are two transversal reinforcements [303] and two vertical reinforcements [304] in supporting case [300] inside.
4. the loading equipemtn that vacuumizes according to claim 3 is characterized in that: the length of supporting case [300] is than the little 10mm of inner length of seal box [400], prevents that the wallboard pressurized back supporting case [300] that shortens from interfering with wallboard.
5. the loading equipemtn that vacuumizes according to claim 4 is characterized in that: supporting case [300] is a steel design, is supported by four contour cushion blocks [305].
6. one kind vacuumizes the load test method, it is characterized in that, comprises the steps:
Step 1: steel supporting case [300] is placed into the block rubber inboard, with cushion block [305] support itself and wallboard covering are kept at a distance, block rubber [201] is sticked with glue covering [101] edge that agent bonds to the long purlin of reinforcement wallboard [100] one side, make block rubber [201] concordant with boss [103];
Step 2: sealing gasket [202] is bonded on block rubber [201] and the boss [103];
Step 3: seal box [400] is enclosed within on the steel supporting case [300], the rubber box is bonded on the sealing gasket [202] then;
Step 4: [502 draw inside and outside the back sealing line outlet [502], again bleed interface [503], intake interface [504] and sensor interface [501] of installation through line outlet with the foil gauge slotted line of the long purlin of wallboard one side;
Step 5: successively rubber ring [505], poly (methyl methacrylate) plate [506], rubber ring [505] and steel trim ring [507] are installed to the opening part on the seal box [400], with the fastening steel trim ring of nut [507], seal this opening, nut is installed on the set bolt, the perforate of sealing and fixing bolt [301];
Step 6: the testpieces after sealing finished is cured, after curing is finished, go up the connection exhaust tube at the interface of bleeding [503], at venting interface [504] mounting ball valve, and close this valve, at sensor interface setting pressure sensor, in the face of being evacuated down to maximum airtight load, testpieces carries out airtight test on ground, airtight inspection is slowly opened ball valve and is exitted to testpieces after finishing, and closes ball valve again after finishing venting.
Step 7: with vertical together being installed on the compression test of part of testpieces [100] and above-mentioned steps installation, be connected to supporting case [300] on the column [603] that is fixed in ground through set bolt, swivel nut [601], screw rod [602] again, open rectangular aperture then and take out four cushion blocks [305], reinstall rubber ring [505], poly (methyl methacrylate) plate [506], rubber ring [505] and steel trim ring [507], finish sealing, at last the foil gauge slotted line is connected with measuring equipment rectangular aperture;
Step 8: during test, earlier wallboard is applied airtight load [106], be evacuated down to peak suction, keep air pressure constant, then wallboard is applied compressive load [106], up to the wallboard unstable failure, in the process of the test, the strain measurement value of recording compressed load, airtight load and structure.
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| CN201110194209.2A CN102288481B (en) | 2011-07-08 | 2011-07-08 | Vacuumizing loading equipment and test method thereof |
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| CN201110194209.2A CN102288481B (en) | 2011-07-08 | 2011-07-08 | Vacuumizing loading equipment and test method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104807703A (en) * | 2015-05-12 | 2015-07-29 | 中国飞机强度研究所 | Airtight and compression loading test device of bent plate |
| CN106018113A (en) * | 2016-07-27 | 2016-10-12 | 晶科能源有限公司 | Device for measuring mechanical intensity of silicon chip by air pressure method |
| CN106018112A (en) * | 2016-07-27 | 2016-10-12 | 晶科能源有限公司 | Device for measuring mechanical strength of silicon slice through hydraulic pressure method |
| CN104696513B (en) * | 2013-12-06 | 2017-10-31 | 中国飞机强度研究所 | A kind of fuselage wallboard encapsulating method |
| CN107842609A (en) * | 2017-11-30 | 2018-03-27 | 中国航空工业集团公司西安飞机设计研究所 | A kind of system frame installs pressure-tight box structure |
| CN107907413A (en) * | 2017-11-15 | 2018-04-13 | 中国矿业大学 | A kind of magnetic intends moonscape gravitational field vacuum environment experimental rig and test method |
| CN113702197A (en) * | 2021-08-23 | 2021-11-26 | 中国飞机强度研究所 | Vacuumizing negative pressure test system and method for airtight structure |
| CN114739821A (en) * | 2022-06-14 | 2022-07-12 | 中国飞机强度研究所 | Aerospace plane wall plate structure load simulation test device and method |
| CN114735237A (en) * | 2022-06-14 | 2022-07-12 | 中国飞机强度研究所 | Structure and method for applying out-of-plane static force in impact test surface of airplane structural component |
| CN115060587A (en) * | 2022-07-27 | 2022-09-16 | 江苏沐阳智骅能源科技有限公司 | Compressive strength test equipment for manufacturing polycrystalline silicon solar cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106018112A (en) * | 2016-07-27 | 2016-10-12 | 晶科能源有限公司 | Device for measuring mechanical strength of silicon slice through hydraulic pressure method |
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| CN113702197A (en) * | 2021-08-23 | 2021-11-26 | 中国飞机强度研究所 | Vacuumizing negative pressure test system and method for airtight structure |
| CN114739821A (en) * | 2022-06-14 | 2022-07-12 | 中国飞机强度研究所 | Aerospace plane wall plate structure load simulation test device and method |
| CN114735237A (en) * | 2022-06-14 | 2022-07-12 | 中国飞机强度研究所 | Structure and method for applying out-of-plane static force in impact test surface of airplane structural component |
| CN115060587A (en) * | 2022-07-27 | 2022-09-16 | 江苏沐阳智骅能源科技有限公司 | Compressive strength test equipment for manufacturing polycrystalline silicon solar cell |
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|---|---|
| CN102288481B (en) | 2014-03-19 |
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