CN116558968A - Test fixture and test method for strength of sheath - Google Patents
Test fixture and test method for strength of sheath Download PDFInfo
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- CN116558968A CN116558968A CN202310847185.9A CN202310847185A CN116558968A CN 116558968 A CN116558968 A CN 116558968A CN 202310847185 A CN202310847185 A CN 202310847185A CN 116558968 A CN116558968 A CN 116558968A
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- 238000012360 testing method Methods 0.000 title claims abstract description 53
- 238000010998 test method Methods 0.000 title claims abstract description 8
- 230000002093 peripheral effect Effects 0.000 claims abstract description 31
- 238000004804 winding Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 230000002452 interceptive effect Effects 0.000 claims description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 11
- 239000004917 carbon fiber Substances 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 10
- 238000004088 simulation Methods 0.000 description 4
- 230000005389 magnetism Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a test fixture and a test method for the strength of a sheath, wherein the test fixture is used for providing an annular winding surface for the sheath and comprises the following components: the first ejector block comprises a first outer conical surface, a second ejector block comprises a second outer conical surface, a plurality of surrounding plates, two hoops and a plurality of winding plates, wherein the surrounding plates are used for surrounding the periphery of the first ejector block and the periphery of the second ejector block which are coaxially arranged, the surrounding plates are arranged in a circumferential direction in a separated mode, the outer peripheral surfaces of the surrounding plates form winding surfaces, the inner peripheral surface of each surrounding plate comprises a first inner conical surface and a second inner conical surface, the first inner conical surface and the first outer conical surface are in shape locking, the second inner conical surface and the second outer conical surface are in shape locking, and the two hoops are used for being sleeved at two ends of the surrounding surfaces formed by the surrounding plates to temporarily fix the surrounding plates. The test tool provided by the invention has the advantages of simple structure and low operation cost. The test method according to the present application is simple to operate and can provide a means for simulating the centrifugal forces to which a real sheath is subjected.
Description
Technical Field
The invention relates to the field of fiber jackets, in particular to a jacket strength testing tool and a jacket strength testing method.
Background
Taking a driving motor of a new energy automobile as an example, a rotor of the motor needs to bear very large centrifugal force at high rotation speed, and high requirements are put on the mechanical strength of a rotor core.
Patent application WO2021225902A1 discloses an electric motor rotor using carbon fiber winding. By winding carbon fibers around the outer periphery of the motor rotor to form a carbon fiber sheath, the rotor core is pre-pressed against the centrifugal force, and the mechanical strength of the rotor can be increased.
For the above-mentioned scheme, how to ensure that the carbon fiber sheath has enough or proper strength to ensure that the carbon fiber sheath can resist the centrifugal force applied to the rotor core is a difficulty in the sheath design process.
An overspeed testing machine is provided in the prior art to verify the strength of the carbon fiber jacket. This solution requires placing the carbon fiber sheath together with the rotor in a testing machine that provides a high rotational speed, rotating the rotor at a high speed (e.g. over 10000 rpm) for a period of time, after which the testing machine is opened to see if the carbon fiber sheath breaks. This solution simulates the centrifugal forces to which the rotor is subjected by rotating it, and the manufacturing and operating costs of the test equipment are very high.
Disclosure of Invention
The invention aims to overcome or at least alleviate the defects in the prior art, and provides a test tool and a test method for testing the strength of a sheath, which have simple structures and low cost.
According to a first aspect of the present invention, there is provided a test fixture for a strength of a sheath, the test fixture for providing an annular winding surface to the sheath and providing a force to the sheath to spread in a peripheral direction of the winding surface, the test fixture comprising:
a first top piece comprising a first outer conical surface which is a part of a conical surface,
a second top piece comprising a second outer conical surface, which is a part of the conical surface, which can be arranged coaxially with the first top piece,
a plurality of surrounding sheets for surrounding the outer circumferences of the first and second top blocks coaxially arranged, the plurality of surrounding sheets being separately arranged in the circumferential direction, the outer circumferences of the plurality of surrounding sheets forming the winding surface, the inner circumference of each surrounding sheet including a first inner tapered surface and a second inner tapered surface, the first inner tapered surface and the first outer tapered surface being in form-locking, the second inner tapered surface and the second outer tapered surface being in form-locking,
and two hoops are used for being sleeved at two ends of a surrounding surface formed by a plurality of surrounding sheets so as to temporarily fix the surrounding sheets.
In at least one embodiment, the test fixture further comprises a connector for connecting the first and second top blocks together with the smaller outer diameter ends thereof facing each other,
the connection allows the first and second top blocks to move axially closer to each other.
In at least one embodiment, the connector is a bolt,
one of the first top block and the second top block is provided with a light hole for the bolt to pass through, and the other one of the first top block and the second top block is provided with a threaded hole capable of being screwed with the bolt.
In at least one embodiment, the outer circumference of the first top block further comprises a first cylindrical surface connected to the first outer conical surface at the end with smaller outer diameter, and/or
The periphery of the second top block further comprises a second cylindrical surface, and the second cylindrical surface and the second outer conical surface are connected to one end of the second outer conical surface, which is smaller in outer diameter.
In at least one embodiment, the inner circumferential surface of the surrounding sheet further includes an inner cylindrical surface located axially between the first inner conical surface and the second inner conical surface.
In at least one embodiment, the hoop comprises an end wall for abutting against an end of the surrounding sheet and a peripheral wall for surrounding the periphery of the surrounding sheet.
In at least one embodiment, the end wall is formed with a plurality of screw holes.
In at least one embodiment, an inner positioning member is formed on the inner peripheral surface of the surrounding sheet, at least one of the first and second top blocks is provided with an outer positioning member,
the inner and outer positioning members can be mated with each other to form a positioning structure.
In at least one embodiment, one of the inner and outer positioning members is a male portion and the other is a female portion,
in the process of testing the test fixture, the convex part can axially move in the concave part without interfering with each other.
According to a second aspect of the present invention, there is provided a method of testing the strength of a sheath, the method comprising:
providing a plurality of surrounding sheets, wherein the surrounding sheets can be arranged around a central shaft in a surrounding way to form a columnar surrounding surface at the periphery;
winding fibers around the periphery of the surrounding surface to form a sheath;
and providing a force in the circumferential direction to the plurality of surrounding sheets, wherein the force is gradually increased to a set maximum value or the sheath is ruptured.
In at least one embodiment, the method uses a test fixture provided according to the first aspect of the present application.
The test tool provided by the invention has the advantages of simple structure and low operation cost. The test method according to the present application is simple to operate and can provide a means for simulating the centrifugal forces to which the sheath is subjected.
Drawings
FIG. 1 is a schematic illustration of a test fixture in section during a test operation according to one embodiment of the present application.
Fig. 2 is an assembly schematic of a test fixture prior to winding a fiber jacket according to one embodiment of the present application.
FIG. 3 is an exploded schematic view of a test fixture according to one embodiment of the present application.
Fig. 4 is a schematic view of a test fixture according to one embodiment of the present application when the sheath is ready to be deployed (with the hoop removed).
Fig. 5 is a schematic diagram of a position change of a test tool during a test according to an embodiment of the present application (the upper and lower dashed lines in the figure are reference lines for comparison, which are used to compare the position change of the surrounding sheet in the radial direction).
Fig. 6 is a cross-sectional view of a real rotor simulated by one possible test fixture.
Reference numerals illustrate:
s, testing a tool; 10. a first top block; 11. a first positioning groove; 12. a first outer conical surface; 13. a first cylindrical surface; 14. a first outer cylindrical surface; 15. bolt holes;
20. a second top block; 21. a second positioning groove; 22. a second outer conical surface; 23. a second cylindrical surface; 24. a second outer cylindrical surface; 25. a light hole; 26. a guide hole;
30. a surrounding sheet; 31. positioning convex strips; 301. a first internal conical surface; 302. a second internal conical surface; 303. an inner cylindrical surface;
40. a hoop; 41. an end wall; 42. a peripheral wall; 401. a screw hole;
50. a bolt;
a P pressure head; c, a sheath; c0 A real sheath; m1, a middle iron core; m2 peripheral iron core; g magnetic isolation intervals; a1 A first span; a2 A second span.
Detailed Description
Exemplary embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that these specific illustrations are for the purpose of illustrating how one skilled in the art may practice the invention, and are not intended to be exhaustive of all of the possible ways of practicing the invention, nor to limit the scope of the invention.
Referring to fig. 1 to 5, a carbon fiber sheath applied to a driving motor of a new energy automobile is taken as an example, and a tool for testing the strength of the sheath according to an embodiment of the present application is described.
The test fixture can simulate the centrifugal force born by the rotor inside the sheath under the condition that high rotating speed is not provided, and apply force towards the radial outer side to the sheath. The simulated rotor is for example with reference to fig. 6. The iron core of this rotor includes middle part iron core M1 and around a plurality of periphery iron cores M2 at middle part iron core M1 periphery, is equipped with the magnet steel between middle part iron core M1 and the periphery iron core M2, and true sheath C0 encircles the periphery at the iron core.
The test fixture S includes a first top block 10, a second top block 20, a plurality (6 in this embodiment) of surrounding pieces 30, two hoops 40, and bolts 50.
The first and second top blocks 10 and 20 have a substantially cylindrical shape. The bolts 50 can coaxially connect the first and second top blocks 10 and 20 together.
Specifically, a bolt hole 15 is formed in the middle of the first top block 10. The middle part of the second ejector block 20 is provided with a stepped hole, the part of the stepped hole facing the bolt hole 15 is a light hole 25, and the part of the stepped hole facing away from the bolt hole 15 is a guide hole 26.
The bolt hole 15 has internal threads that can be screwed with external threads of the bolt 50. The stepped bore is unthreaded, wherein the inside diameter of the unthreaded bore 25 is slightly larger than the outside diameter of the threaded portion of the bolt 50, and the pilot bore 26 is slightly larger than the outside diameter of the head of the bolt 50. The bolts 50 pass through the stepped holes and are then screwed into the bolt holes 15, so that the first and second top blocks 10 and 20 can be coaxially coupled together.
It should be appreciated that since the stepped bore is not threaded, the first and second top blocks 10, 20 may be axially adjacent to one another without the bolt 50 tightened, or otherwise with an axial gap between the first and second top blocks 10, 20. This freedom of movement will be more readily understood when working the tooling is described below.
The outer diameter dimensions of the first and second top blocks 10 and 20 are not identical in the axial direction.
The first top block 10 includes a first cylindrical surface 13, a first outer conical surface 12, and a first outer cylindrical surface 14, which are sequentially connected in the axial direction. The diameter of the first cylindrical surface 13 is smaller than the diameter of the first outer cylindrical surface 14. The first outer conical surface 12 is a part of a conical surface, or a rounded mesa. The end of the first cylindrical surface 13 is hereinafter referred to as the small end of the first top block 10, and the end of the first outer cylindrical surface 14 is hereinafter referred to as the large end of the first top block 10.
The second top block 20 includes a second cylindrical surface 23, a second outer conical surface 22, and a second outer cylindrical surface 24, which are sequentially connected in the axial direction. The diameter of the second cylindrical surface 23 is smaller than the diameter of the second outer cylindrical surface 24. The second outer conical surface 22 is a portion of a conical surface, or a rounded mesa. The end of the second cylindrical surface 23 is hereinafter referred to as the small end of the second top block 20, and the end of the second outer cylindrical surface 24 is hereinafter referred to as the large end of the second top block 20.
The first top block 10 and the second top block 20 are connected in such a manner that the small ends thereof are disposed opposite to each other. The outer diameter of the first cylindrical surface 13 is the same as the outer diameter of the second cylindrical surface 23. The whole of the first top block 10, the second top block 20, and the bolt 50 will be hereinafter referred to as a "middle adjuster".
A plurality of circumferential tabs 30 are disposed against the outer periphery of the central adjustment body. Each surrounding piece 30 has a tile shape, the outer peripheral surface of which is formed as a part of a cylindrical surface, and the inner peripheral surface of which can be fitted to the outer peripheral surface of the middle adjusting body.
Specifically, the inner peripheral surface of the surrounding sheet 30 includes a first inner conical surface 301, a second inner conical surface 302, and an inner cylindrical surface 303. The first inner conical surface 301 is in form-locking with the first outer conical surface 12, the second inner conical surface 302 is in form-locking with the second outer conical surface 22, and the inner cylindrical surface 303 is in form-locking with the first cylindrical surface 13 and the second cylindrical surface 23.
In the case where the plurality of surrounding pieces 30 are provided around the central adjusting body, the plurality of surrounding pieces 30 function as a simulated rotor core.
Referring to fig. 6 (fig. 6 is cited from fig. 4 of patent publication WO2021225902 A1), a magnetic separation gap G is formed between the outer peripheral core M2 and the middle core M1 at a circumferential interval. It should be appreciated that in other possible embodiments, the peripheral core M2 and the middle core M1 may also be circumferentially connected to form a very narrow magnetic barrier bridge.
In the case of high-speed rotation of the rotor, the outer peripheral portion of the core (including the outer peripheral portion of the outer peripheral core M2 and the middle core M1), particularly the outer peripheral core M2, tends to fly away in the outer peripheral direction due to centrifugal force. Accordingly, three simulation methods are presented.
Hereinafter, the dimension of the outer peripheral core M2 in the circumferential direction is referred to as a first span A1, the dimension of the outermost peripheral portion of the middle core M1 in the circumferential direction is referred to as a second span A2, and the dimension of the interval between the outer peripheral core M2 and the middle core M1 in the circumferential direction is referred to as a magnetism separation interval G.
The first simulation method:
each of the surrounding pieces 30 is used to simulate one of the outer circumferential cores M2, and then the circumferential dimension of each of the surrounding pieces 30 is equal to the first span A1; the interval between adjacent surrounding sheets 30 is equal to the second span a2+2×the magnetism separation interval G.
The second simulation method:
a part of the surrounding sheet 30 is used to simulate the outer peripheral core M2, and such a surrounding sheet 30 will be hereinafter referred to as a first type of surrounding sheet; a part of the surrounding sheet 30 is used to simulate the middle core M1, and such a surrounding sheet 30 will hereinafter be referred to as a second type of surrounding sheet.
The circumferential dimension of the first type surrounding sheet is equal to the first span A1, the circumferential dimension of the second type surrounding sheet is equal to the second span A2, and the circumferential dimension between the adjacent first type surrounding sheet and second type surrounding sheet is equal to the magnetism isolating interval G.
Third simulation method:
the entire core is taken as a whole, and the middle core M1 and the outer peripheral core M2 are not particularly distinguished. In this case, there is no space between adjacent surrounding sheets 30.
It should be understood that the absence of a space between adjacent surrounding sheets 30 does not indicate that they are secured together, and that they are still referred to as being separated. Adjacent surrounding sheets 30 are immediately adjacent to each other, and when subjected to a spreading force toward the outer periphery, the adjacent surrounding sheets 30 are spaced apart.
Referring to fig. 3, in order to facilitate positioning of the surrounding sheet 30 in the circumferential direction with respect to the central adjusting body, the inner peripheral surface of the surrounding sheet 30 is partially protruded in the inner circumferential direction to form a positioning rib 31 extending in the axial direction.
In cooperation with the positioning convex strips 31, a plurality of first positioning grooves 11 are formed in the portion of the first top block 10 near the small head, and a plurality of second positioning grooves 21 are formed in the portion of the second top block 20 near the small head.
The positioning convex strips 31 of the surrounding sheet 30 can extend into the first positioning groove 11 and the second positioning groove 21, so that the surrounding sheet 30 is positioned relative to the middle adjusting body in the circumferential direction.
It will be appreciated that once the axial distance between the first and second top blocks 10, 20 is determined, the outer diameter of the cylindrical surface on which the outer circumferential surfaces of the surrounding pieces 30, which abut the outer circumferences of the first and second top blocks 10, 20, are located, may also be determined.
Optionally, the axial distance between the first top piece 10 and the second top piece 20 is defined by tooling, for example, before the surrounding piece 30 is assembled. For another example, scale marks may be provided on the first and second top blocks 10 and 20, and the surrounding sheet 30 may be used as a scale, with both end portions of the surrounding sheet 30 being aligned with the scales on the first and second top blocks 10 and 20, respectively, to determine initial mounting positions of the first and second top blocks 10 and 20 and the surrounding sheet 30 with respect to each other in the axial direction.
The hoop 40 is used to fix the positions of the plurality of surrounding sheets 30 temporarily by being respectively fitted over both ends of the cylindrical surface formed by the plurality of surrounding sheets 30 after the positions of the first top block 10, the second top block 20, and the surrounding sheets 30 are substantially fixed.
The hoop 40 includes an end wall 41 and a peripheral wall 42. The end wall 41 is adapted to abut against an axial end face of the surrounding sheet 30, and the peripheral wall 42 is adapted to surround an outer periphery of the surrounding sheet 30.
The end wall 41 is also formed with a plurality of screw holes 401. Screw holes 401 are used in conjunction with screws to effect the removal of hoop 40 as described below.
After the hoop 40 secures the hoop around the sheet 30, carbon fiber may be wrapped around the circumference of the sheet 30 to form a sheath C to simulate a real sheath C0.
After the wrapping of the sheath C is completed, the surrounding sheet 30 is fixed, and thus the hoop 40 temporarily fixing the surrounding sheet 30 can be removed.
In the present embodiment, the following manner is provided: with the screw having a length greater than the thickness of the end wall 41, the screw is screwed into the screw hole 401 until the screw abuts against the end face of the surrounding sheet 30, the screw continues to be screwed in the screwing direction, and the pressing force between the threads causes the band 40 to move away from the surrounding sheet 30 in the axial direction until it falls off.
Thus, the false rotor which can simulate the real carbon fiber rotor can be obtained. Then, a pressure force is applied to the first top block 10 and the second top block 20 so that the two blocks are close to each other, and the component force of the pressure force applied to the surrounding sheet 30 can push the surrounding sheet 30 to generate a tiny displacement to the radial outside, so that the sheath C is further spread, and the sheath C is spread similarly to the centrifugal force of the iron core when the rotor rotates at a high speed.
Specifically, for example, the second top block 20 is abutted against the reference plane, and the pressure head P is used to apply pressure to the first top block 10. When the radial component force acting on the surrounding piece 30 due to the pressure exceeds the pre-tightening force of the jacket C, the jacket C is slightly deformed, the surrounding piece 30 is slightly displaced radially outward, and the first and second top pieces 10 and 20 are brought close to each other, as shown with reference to fig. 5, for example.
The pressure profile was recorded until the jacket C was propped open. The point at which the pressure curve breaks corresponds to the critical pressure at which the sheath C is stretched. The centrifugal force corresponding to the critical pressure can be converted from the inclination angle of the first outer cone 12 and the second outer cone 22.
Of course, the pressure may be increased gradually during the test, but not necessarily until the sheath C is ruptured, but rather a set maximum value of the pressure is provided. If the sheath C is not broken under the pressure of the set maximum value, the strength of the sheath C can reach the set requirement.
The present invention has at least one of the following advantages:
(i) The tool provided by the invention can simulate the rotor, and the tool can simulate centrifugal force by moving the driving part to the peripheral direction under the condition of no rotation. The test fixture is simple in structure and low in cost.
(ii) Through the first ejector block 10 and the second ejector block 20 with conical surfaces, the simulated centrifugal force can be provided by the pressure acting along the straight line, and the tooling is simple to operate and low in running cost.
(iii) Under the condition of ensuring that the test fixture is installed in place, the hoop can be flexibly detached, so that the fixture is convenient to use.
Of course, the present invention is not limited to the above-described embodiments, and various modifications may be made to the above-described embodiments of the present invention by those skilled in the art in light of the present teachings without departing from the scope of the present invention. For example:
(i) The bolts 50 may be replaced with other connectors that provide centering of the first and second top pieces 10, 20. For example, the bolt 50 may be replaced with an unthreaded connection post. It will be appreciated that in this case, it is necessary to apply a certain pre-compression force to the first and second top blocks 10 and 20 to bring them close to each other when assembling the test fixture S.
(ii) Bolts 50 or similar connectors may also be eliminated, while ensuring that the first and second top pieces 10, 20 remain coaxial during assembly. It will be appreciated that in this case, it is necessary to apply a certain pre-compression force to the first and second top blocks 10 and 20 to bring them close to each other when assembling the test fixture S.
(iii) Only one of the first and second positioning grooves 11 and 21 may be reserved. It should be appreciated that in this case, the axial distance of the positioning ribs 31 should be adapted so that the positioning ribs 31 do not interfere with the first top block 10 or the second top block 20 during the process of approaching the first top block 10 and the second top block 20 to each other.
(iv) The setting positions of the positioning convex strips and the positioning grooves can be exchanged, for example, the positioning convex strips are arranged on the first top block and the second top block, and the positioning grooves are arranged on the surrounding sheets.
(v) The collar 40 may also be removed by other structures or tools without the screw holes 401 for engagement with screws.
(vi) The first outer cylindrical surface 14 and the second outer cylindrical surface 24 are not necessary and may be omitted.
Claims (11)
1. A test fixture for jacket strength, the test fixture being for providing an annular winding surface for a jacket (C) and for providing the jacket (C) with a force to the circumferential direction of the winding surface, characterized in that the test fixture comprises:
a first top piece (10) comprising a first outer conical surface (12), said first outer conical surface (12) being part of a conical surface,
a second top piece (20) comprising a second outer conical surface (22), said second outer conical surface (22) being part of a conical surface, said second top piece (20) being coaxially arranged with said first top piece (10),
a plurality of surrounding sheets (30) for surrounding the outer circumferences of the first top block (10) and the second top block (20) coaxially arranged, a plurality of the surrounding sheets (30) being arranged separately in the circumferential direction, the outer circumferential surfaces of the plurality of the surrounding sheets (30) forming the winding surface, the inner circumferential surface of each of the surrounding sheets (30) including a first inner tapered surface (301) and a second inner tapered surface (302), the first inner tapered surface (301) and the first outer tapered surface (12) being in form-locking, the second inner tapered surface (302) and the second outer tapered surface (22) being in form-locking,
and two hoops (40) for being fitted over both ends of a surrounding surface formed by the plurality of surrounding sheets (30) to temporarily fix the surrounding sheets (30).
2. The tool for testing the strength of a sheath according to claim 1, further comprising a connecting member for connecting the small end of the first top block (10) and the small end of the second top block (20) opposite to each other,
the first top piece (10) and the second top piece (20) can move close to each other in the axial direction.
3. The tool for testing the strength of a sheath according to claim 2, wherein the connecting piece is a bolt (50),
one of the first top block (10) and the second top block (20) is provided with a light hole for the bolt (50) to pass through, and the other of the first top block (10) and the second top block (20) is provided with a threaded hole capable of being screwed with the bolt (50).
4. The tool for testing the strength of a sheath according to claim 1, wherein the outer circumference of the first top block (10) further comprises a first cylindrical surface (13), the first cylindrical surface (13) and the first outer conical surface (12) are connected to the small end of the first outer conical surface (12), and/or
The periphery of the second top block (20) further comprises a second cylindrical surface (23), and the second cylindrical surface (23) and the second outer conical surface (22) are connected to the small end of the second outer conical surface (22).
5. The tool for testing the strength of a sheath according to claim 4, wherein the inner circumferential surface of the surrounding sheet (30) further comprises an inner cylindrical surface (303), and the inner cylindrical surface (303) is axially located between the first inner conical surface (301) and the second inner conical surface (302).
6. The tool for testing the strength of a sheath according to claim 1, wherein the hoop (40) comprises an end wall (41) and a peripheral wall (42), the end wall (41) being adapted to abut against an end of the surrounding sheet (30), the peripheral wall (42) being adapted to surround an outer periphery of the surrounding sheet (30).
7. A tool for testing the strength of a sheath according to claim 6, wherein the end wall (41) is formed with a plurality of screw holes (401).
8. The tool for testing the strength of a sheath according to claim 1, wherein an inner positioning member is formed on the inner peripheral surface of the surrounding sheet (30), at least one of the first top block (10) and the second top block (20) is provided with an outer positioning member,
the inner and outer positioning members can be mated with each other to form a positioning structure.
9. The tool for testing the strength of a sheath according to claim 8, wherein one of the inner positioning member and the outer positioning member is a convex portion and the other is a concave portion,
in the process of testing the test fixture, the convex part can axially move in the concave part without interfering with each other.
10. A method of testing the strength of a sheath, the method comprising:
providing a plurality of surrounding sheets (30), wherein the surrounding sheets (30) can be arranged around a central shaft in a surrounding way to form a columnar surrounding surface at the periphery;
winding fibers around the periphery of the surrounding surface to form a sheath;
providing a force to the plurality of surrounding sheets (30) in the peripheral direction, and gradually increasing the magnitude of the force to a set maximum value or until the sheath is ruptured.
11. The method for testing the strength of a sheath of claim 10, wherein: the method uses the test fixture according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310847185.9A CN116558968B (en) | 2023-07-12 | 2023-07-12 | Test fixture and test method for strength of sheath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310847185.9A CN116558968B (en) | 2023-07-12 | 2023-07-12 | Test fixture and test method for strength of sheath |
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| Publication Number | Publication Date |
|---|---|
| CN116558968A true CN116558968A (en) | 2023-08-08 |
| CN116558968B CN116558968B (en) | 2023-09-22 |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4628746A (en) * | 1984-02-02 | 1986-12-16 | Varicar B. V. | Device for determining the torque transmitted between a set of conical disks of a continuously variable transmission and the shaft thereof |
| CN104215501A (en) * | 2013-05-30 | 2014-12-17 | 深圳市海洋王照明工程有限公司 | Intensity testing apparatus of cable conductor insulation sheath |
| DE102015102841A1 (en) * | 2015-02-27 | 2016-09-01 | Terex MHPS IP Management GmbH | test load |
| US20180120283A1 (en) * | 2017-03-07 | 2018-05-03 | Ramesh Chandra Gupta | Expandable Jacket for Triaxial, Unconfined and Uniaxial Compression Tests and Test Device for Three-Dimensional Consolidation and Settlement Tests |
| CN209624212U (en) * | 2019-01-21 | 2019-11-12 | 浙江飞旋科技有限公司 | A kind of carbon fiber sheath performance test machine hypervelocity device |
| CN110849738A (en) * | 2019-12-09 | 2020-02-28 | 湖南崇德工业科技有限公司 | Fiber reinforced composite material winding mandrel, winding tool and stretching tool |
| CN212254858U (en) * | 2020-05-21 | 2020-12-29 | 天津飞旋科技有限公司 | Sheath mechanical properties detection device |
| CN114965067A (en) * | 2021-12-31 | 2022-08-30 | 中国石油天然气集团有限公司 | Bridge plug anchoring and bearing test device and test method |
| CN218823616U (en) * | 2022-11-22 | 2023-04-07 | 南京华脉汽车部件制造有限公司 | Tensile detection device is used in production of car blet pipe fitting |
| US20230179045A1 (en) * | 2020-05-04 | 2023-06-08 | Tesla, Inc. | Permanent magnet motor with wrapping |
-
2023
- 2023-07-12 CN CN202310847185.9A patent/CN116558968B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4628746A (en) * | 1984-02-02 | 1986-12-16 | Varicar B. V. | Device for determining the torque transmitted between a set of conical disks of a continuously variable transmission and the shaft thereof |
| CN104215501A (en) * | 2013-05-30 | 2014-12-17 | 深圳市海洋王照明工程有限公司 | Intensity testing apparatus of cable conductor insulation sheath |
| DE102015102841A1 (en) * | 2015-02-27 | 2016-09-01 | Terex MHPS IP Management GmbH | test load |
| US20180120283A1 (en) * | 2017-03-07 | 2018-05-03 | Ramesh Chandra Gupta | Expandable Jacket for Triaxial, Unconfined and Uniaxial Compression Tests and Test Device for Three-Dimensional Consolidation and Settlement Tests |
| CN209624212U (en) * | 2019-01-21 | 2019-11-12 | 浙江飞旋科技有限公司 | A kind of carbon fiber sheath performance test machine hypervelocity device |
| CN110849738A (en) * | 2019-12-09 | 2020-02-28 | 湖南崇德工业科技有限公司 | Fiber reinforced composite material winding mandrel, winding tool and stretching tool |
| US20230179045A1 (en) * | 2020-05-04 | 2023-06-08 | Tesla, Inc. | Permanent magnet motor with wrapping |
| CN212254858U (en) * | 2020-05-21 | 2020-12-29 | 天津飞旋科技有限公司 | Sheath mechanical properties detection device |
| CN114965067A (en) * | 2021-12-31 | 2022-08-30 | 中国石油天然气集团有限公司 | Bridge plug anchoring and bearing test device and test method |
| CN218823616U (en) * | 2022-11-22 | 2023-04-07 | 南京华脉汽车部件制造有限公司 | Tensile detection device is used in production of car blet pipe fitting |
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| CN116558968B (en) | 2023-09-22 |
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