CN111458126B - Uniform load follow-up loading device - Google Patents
Uniform load follow-up loading device Download PDFInfo
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- CN111458126B CN111458126B CN202010306632.6A CN202010306632A CN111458126B CN 111458126 B CN111458126 B CN 111458126B CN 202010306632 A CN202010306632 A CN 202010306632A CN 111458126 B CN111458126 B CN 111458126B
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- test piece
- opening
- follow
- plate
- loading device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/60—Testing or inspecting aircraft components or systems
Abstract
The application belongs to the technical field of airplane strength test design, and particularly relates to a uniformly distributed load follow-up loading device which comprises a fixing plate, a capsule shell, a punching capsule and a follow-up baffle, wherein the fixing plate is used for fixing a test piece; the capsule shell is fixed on the fixing plate and forms an accommodating cavity together with the fixing plate, a compression testing part of the test piece is positioned in the accommodating cavity, the other end of the capsule shell is provided with an opening, the test piece extends out of the accommodating cavity from the opening, and the capsule shell is provided with a sliding surface arranged along the radial direction at the opening; the punching bag is arranged in the accommodating cavity and is used for applying load to a pressed test part of the test piece during punching expansion; the follow-up baffle is an annular plate with a through hole, the through hole is sleeved on the test piece in an adaptive mode, and the annular plate is arranged on the sliding surface in a sliding mode. This application sets up follow-up baffle at the opening part of punching press bag installation space, has both guaranteed to reserve the opening space that the test piece warp at this opening part, has guaranteed again that the punching press bag can not extrude from this opening space.
Description
Technical Field
The application belongs to the technical field of aircraft strength tests, and particularly relates to an evenly distributed load follow-up loading device.
Background
As shown in figure 1, in a static strength test of a circular truncated cone cabin of an aircraft, uniform load needs to be applied to a test piece. And (3) applying uniform load, designing a pressurizing bag and a bag shell, wherein the pressurizing bag is positioned between the shell and the test piece. For the test piece with higher rigidity, the deformation of the test piece is smaller in the test process, the gap between the capsule shell and the test piece is always smaller, and the pressurizing capsule in the cavity cannot be damaged due to extrusion from the gap after bearing pressure. For a large-deformation test piece, the test piece bears a large concentrated load in a static test, and the test piece generates large deformation towards the loading direction. By using the traditional uniform load loading method, if the clearance between the capsule shell and the test piece is small, the test piece is in contact with the capsule shell due to large deformation, the capsule shell adds extra load to the test piece to limit the deformation of the test piece, and meanwhile, the contact part of the test piece and the capsule shell has damage risk; if the clearance between the capsule shell and the test piece is large, the pressurizing capsule is extruded from the clearance after bearing pressure in the test, and the pressurizing capsule is damaged.
Disclosure of Invention
In order to solve at least one of the above technical problems, the present application provides an evenly distributed load follow-up loading device, including:
the fixing plate is arranged at the bottom end of the test piece and used for fixing the test piece;
the test piece comprises a fixing plate, a capsule shell, a pressure testing part and a test piece, wherein one end of the capsule shell is fixed on the fixing plate and forms an accommodating cavity together with the fixing plate, the pressure testing part of the test piece is positioned in the accommodating cavity, the other end of the capsule shell is provided with an opening, the test piece extends out of the accommodating cavity from the opening, the size of the opening is larger than the outer diameter of the part, positioned at the opening, of the test piece so as to reserve a space required by radial deformation of the test piece, and the capsule shell is provided with a sliding surface arranged in the radial direction at the opening;
the punching bag is arranged in the accommodating cavity and is used for applying load to a pressed test part of the test piece when the punching bag is punched and expanded;
the follow-up baffle is an annular plate with a through hole, the through hole is sleeved on the test piece in a matched mode, and the annular plate is arranged on the sliding surface in a sliding mode.
Preferably, the capsule shell comprises a vertical cylinder and a cover plate positioned at one end of the vertical cylinder, the other end of the vertical cylinder is fixed on the fixing plate, the plate surface of the cover plate is perpendicular to the axial direction of the vertical cylinder, and the opening is formed in the middle of the cover plate.
Preferably, the vertical cylinder is fixed on the fixing plate through an L-shaped pressing plate.
Preferably, the apron includes two-layer face from top to bottom, has the hole between two-layer face, and at the orientation of apron open-ended medial surface is uncovered, follow-up baffle is from the opening end stretches into in the hole.
Preferably, the follow-up baffle is arranged below the cover plate and is pressed against the bottom surface of the cover plate through the punching bag.
Preferably, the punching capsule is fixed to an inner wall of the capsule housing.
Preferably, the capsule shell is made of steel material, and the punching capsule is made of rubber material.
Preferably, the end of the follower flap in contact with the punching capsule is provided with a beveled transition.
Preferably, the end of the follow-up baffle, which is in contact with the punching capsule, is provided with a rounded corner.
Preferably, a flexible gasket is arranged between the follow-up baffle and the test piece.
This application sets up follow-up baffle at the opening part of punching press bag installation space, has both guaranteed to reserve the opening space that the test piece warp at this opening part, has guaranteed again that the punching press bag can not extrude from this opening space, has protected equipment safety, implements simply, maintains the convenience.
Drawings
FIG. 1 is a schematic diagram of a static strength test of a circular truncated cone cabin of an aircraft in the prior art.
Fig. 2 is a schematic structural diagram of the uniform load distribution follow-up loading device.
Fig. 3 is a schematic structural diagram of the follower baffle of the embodiment shown in fig. 2 of the present application.
FIG. 4 is a schematic view of section A-A of the follower flapper of FIG. 3 of the present application.
The test device comprises a test piece 1, a follow-up baffle 2, a punching bag 3, a bag shell 4 and a fixing plate 5, wherein P/Q/F is a load, A is the moving direction of the follow-up baffle, and B is the moving direction of the test piece.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all embodiments of the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application, and should not be construed as limiting the present application. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application. Embodiments of the present application will be described in detail below with reference to the drawings.
This application equipartition load follow-up loading device, as shown in fig. 2, mainly include:
the fixing plate 5 is arranged at the bottom end of the test piece 1 and used for fixing the test piece 1;
the capsule shell 4 is fixed on the fixing plate 5 at one end and forms an accommodating cavity together with the fixing plate 5, a pressure test part of the test piece 1 is positioned in the accommodating cavity, an opening is formed in the other end of the capsule shell 4, the test piece 1 extends out of the accommodating cavity from the opening, the size of the opening is larger than the outer diameter of the part, positioned at the opening, of the test piece to reserve a space required by radial deformation of the test piece 1, and a sliding surface arranged in the radial direction is arranged at the opening of the capsule shell 4;
the punching bag 3 is arranged in the accommodating cavity and is used for applying load to a pressed test part of the test piece 1 when the punching bag is punched and expanded;
the follow-up baffle 2 is an annular plate with a through hole, the through hole is sleeved on the test piece in a matching mode, and the annular plate is arranged on the sliding surface in a sliding mode.
This application is at first produced the fixed plate and is supported the restraint admittedly with the test piece, and the pressurization bag that design and test piece appearance structure match is used for applying the equipartition load, and the pressurization bag is fixed on the bag shell. The upper end of the capsule shell is reserved with a space required by deformation of a test piece, a follow-up baffle is designed, the follow-up baffle is positioned on the inner side of the upper end of the capsule shell, and the upper end of the inner side of the capsule shell can freely slide in the radial direction. The cavity that the clearance is less is formed between bag shell, testpieces, follow-up baffle and the fixed plate, and the pressurization bag is located inside the cavity, and the testpieces takes place big deformation, and the follow-up baffle removes along the testpieces deformation direction, and the clearance is filled by the follow-up baffle all the time between testpieces and the bag shell, and the pressurization bag can not be destroyed because the clearance grow is extruded, applys equipartition load to the testpieces follow-up simultaneously.
In some alternative embodiments, the capsule housing 4 comprises a vertical cylinder and a cover plate at one end of the vertical cylinder, the other end of the vertical cylinder is fixed on the fixing plate 5, the plate surface of the cover plate is perpendicular to the axial direction of the vertical cylinder, and the opening is arranged in the middle of the cover plate.
In some alternative embodiments, the vertical cylinder is fixed to the fixing plate 5 by an L-shaped pressing plate.
Referring to fig. 2, the test piece 1 is deformed by the pressing bag 3 and may move along the direction B, the opening at the upper end of the bag housing 4 has a large size, so that the test piece 1 is not constrained by the bag housing 4 when moving along the direction B, but because the reserved opening has a large size, the pressing bag 3 is easily extruded from the opening under the action of the pressing force, for this purpose, the following baffle 2 is slidably disposed at the opening, and the structure of the following baffle 2 is as shown in fig. 3 and 4, which is essentially a ring-shaped plate with a through hole, and the main body of the ring-shaped plate is just filled in the opening, so that the pressing bag 3 can be prevented from being extruded from the opening, and meanwhile, the following baffle 2 is slidably disposed at the opening without affecting the movement of the test piece 1 along the direction B.
The sliding arrangement of the follower baffle 2 at the opening can be implemented in various ways, for example, in the embodiment shown in fig. 2, the follower baffle 2 is arranged below the cover plate and is pressed against the bottom surface of the cover plate by the punching bag 3, so that the outer annular part of the follower baffle 2 is located between the punching bag 3 and the upper cover plate of the bag shell 4, the follower baffle 2 is in sliding contact with the punching bag 3, and the follower baffle 2 is also in sliding contact with the upper cover plate of the bag shell 4, thereby realizing the sliding arrangement problem of the follower baffle 2.
In alternative embodiments, the sliding arrangement problem of the follow-up baffle 2 may also be realized in a sandwich manner, specifically including: the apron has the hole including upper and lower two-layer face between the two-layer face, and at the orientation of apron open-ended medial surface is uncovered, follow-up baffle 2 certainly the open-ended end stretches into in the hole.
In some alternative embodiments, the bladder housing is made of a steel material and the stamped bladder is made of a rubber material.
The thickness of the follow-up baffle is determined according to the uniform distribution pressure exerted by the pressurizing bag, the size of a bag structure reserved space and the material parameters of the follow-up baffle, a transition area and a fillet are arranged in the contact area of the follow-up baffle and the pressurizing bag, the pressurizing bag is prevented from being damaged in the moving process of the follow-up baffle, and meanwhile, the flexible material is lined in the contact area of the follow-up baffle and the test piece, so that the surface of the test piece is prevented from being damaged in the moving process of the follow-up baffle.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides an equipartition load follow-up loading device which characterized in that includes:
the fixing plate (5) is arranged at the bottom end of the test piece (1) and used for fixing the test piece (1);
the capsule shell (4) is fixed on the fixing plate (5) at one end and forms a containing cavity together with the fixing plate (5), the compression testing part of the test piece (1) is positioned in the containing cavity, the other end of the capsule shell (4) is provided with an opening, the test piece (1) extends out of the containing cavity from the opening, the size of the opening is larger than the outer diameter of the part, positioned at the opening, of the test piece so as to reserve a space required by radial deformation of the test piece (1), and the capsule shell (4) is provided with a sliding surface arranged in the radial direction at the opening;
the punching bag (3) is arranged in the accommodating cavity and is used for applying load to a pressed test part of the test piece (1) when the punching bag is punched and expanded;
the follow-up baffle (2) is an annular plate with a through hole, the through hole is sleeved on the test piece in a matching mode, and the annular plate is arranged on the sliding surface in a sliding mode.
2. A uniformly distributed load follow-up loading device according to claim 1, wherein the capsule housing (4) comprises a vertical cylinder and a cover plate at one end of the vertical cylinder, the other end of the vertical cylinder is fixed on the fixing plate (5), the plate surface of the cover plate is perpendicular to the axial direction of the vertical cylinder, and the opening is arranged in the middle of the cover plate.
3. A uniform load distributing servo loading device as claimed in claim 2, wherein said vertical cylinder is fixed to said fixed plate (5) by means of an L-shaped pressure plate.
4. A uniformly distributed load follow-up loading device according to claim 2, wherein said cover plate comprises an upper plate surface and a lower plate surface, a hole is formed between the two plate surfaces, the inner side surface of the cover plate facing said opening is open, and said follow-up baffle (2) extends into said hole from said open end.
5. A uniform load follow-up loading device according to claim 2, characterised in that the follow-up baffle (2) is arranged below the cover plate and is pressed against the bottom surface of the cover plate by a pressing bladder (3).
6. A uniform load distributing servo loading device as claimed in claim 1, wherein said punching capsule (3) is fixed to the inner wall of said capsule housing (4).
7. A uniform load distributing servo loading device as in claim 1 wherein said bladder housing is formed of a steel material and said ram bladder is formed of a rubber material.
8. A uniform load distributing servo loading device as claimed in claim 1, wherein the end of the servo dam (2) in contact with the stamping capsule (3) is provided with a bevelled transition.
9. A uniform load distributing servo loading device as in claim 1, wherein the end of the servo dam (2) in contact with the punching capsule (3) is provided with a rounded corner.
10. A uniform load distributing servo loading device according to claim 1, wherein a flexible gasket is arranged between the servo damper (2) and the test piece (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010306632.6A CN111458126B (en) | 2020-04-17 | 2020-04-17 | Uniform load follow-up loading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010306632.6A CN111458126B (en) | 2020-04-17 | 2020-04-17 | Uniform load follow-up loading device |
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| Publication Number | Publication Date |
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| CN111458126A CN111458126A (en) | 2020-07-28 |
| CN111458126B true CN111458126B (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010306632.6A Active CN111458126B (en) | 2020-04-17 | 2020-04-17 | Uniform load follow-up loading device |
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Citations (8)
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| US6629445B2 (en) * | 2000-07-05 | 2003-10-07 | Denso Corporation | Method of calibrating sensitivity of pressure sensing cells of vehicle passenger seat |
| CN103674580A (en) * | 2013-11-27 | 2014-03-26 | 南车青岛四方机车车辆股份有限公司 | Vehicle body side wall loading device and method |
| CN104316409A (en) * | 2014-11-03 | 2015-01-28 | 北京强度环境研究所 | Form-fitting partial high-uniform-distribution external pressure following applying and loading device |
| CN204165743U (en) * | 2014-09-22 | 2015-02-18 | 上海航天精密机械研究所 | Bulb wimble structure external pressure charger |
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| CN107505205A (en) * | 2017-08-10 | 2017-12-22 | 山东建筑大学 | Simulate the flexible loading device and method of cylinder anchorage model surface uniform stress |
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| JPS5912335A (en) * | 1982-07-13 | 1984-01-23 | Mitsui Eng & Shipbuild Co Ltd | Strength testing method |
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2020
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| US6629445B2 (en) * | 2000-07-05 | 2003-10-07 | Denso Corporation | Method of calibrating sensitivity of pressure sensing cells of vehicle passenger seat |
| JP5912335B2 (en) * | 2011-08-18 | 2016-04-27 | Ｄｏｗａエレクトロニクス株式会社 | Hexagonal ferrite magnetic powder and magnetic recording medium using the same |
| CN103674580A (en) * | 2013-11-27 | 2014-03-26 | 南车青岛四方机车车辆股份有限公司 | Vehicle body side wall loading device and method |
| CN104697762A (en) * | 2013-12-06 | 2015-06-10 | 中国飞机强度研究所 | Airplane vertical tail dynamic load following loading test device |
| CN204165743U (en) * | 2014-09-22 | 2015-02-18 | 上海航天精密机械研究所 | Bulb wimble structure external pressure charger |
| CN104316409A (en) * | 2014-11-03 | 2015-01-28 | 北京强度环境研究所 | Form-fitting partial high-uniform-distribution external pressure following applying and loading device |
| CN107505205A (en) * | 2017-08-10 | 2017-12-22 | 山东建筑大学 | Simulate the flexible loading device and method of cylinder anchorage model surface uniform stress |
| CN108061689A (en) * | 2017-11-29 | 2018-05-22 | 中国航空工业集团公司济南特种结构研究所 | A kind of basic load loading method of deep camber radome |
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| CN111458126A (en) | 2020-07-28 |
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