CN106644450B - Anti-rotation adjusting device for centrifugal test - Google Patents
Anti-rotation adjusting device for centrifugal test Download PDFInfo
- Publication number
- CN106644450B CN106644450B CN201710015759.0A CN201710015759A CN106644450B CN 106644450 B CN106644450 B CN 106644450B CN 201710015759 A CN201710015759 A CN 201710015759A CN 106644450 B CN106644450 B CN 106644450B
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- China
- Prior art keywords
- pull rod
- test
- connecting piece
- adjusting pull
- centrifugal
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- 238000012360 testing method Methods 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 abstract description 15
- 238000010008 shearing Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
- F16B7/10—Telescoping systems
Abstract
The invention relates to the technical field of mechanical environment tests, in particular to an anti-rotation adjusting device for a centrifugal test. According to the invention, the telescopic end of the adjusting pull rod can rotate relative to the fixed section of the adjusting pull rod, so that the whole length of the adjusting pull rod is changed, the second connecting piece is rotatably connected with the fixed end of the adjusting pull rod in the centrifugal test process, and the loosening of the relative rotation of the telescopic end of the adjusting pull rod and the fixed end is prevented, so that the adjusting pull rod always maintains a pre-tightening state in the centrifugal test process, the rotation of a test cabin caused by mass eccentricity in the centrifugal test process is avoided, the stable positions of the test piece and the test cabin are always maintained, and the safe and reliable performance of the whole centrifugal test is ensured.
Description
Technical Field
The invention relates to the technical field of mechanical environment tests, in particular to an anti-rotation adjusting device for a centrifugal test.
Background
The centrifugal test technology is widely applied in the industries of aerospace, geotechnics, medicines and the like. As shown in the centrifugal machine in FIG. 1, the test cabin is connected with the large arm through a round pin shaft, and the test cabin is fixed in position through a pin shaft expansion sleeve. In the centrifugal test process, if the center of mass of the test piece deviates from the center plane of the pin shaft, in the rotating process, the test piece drives the test cabin to rotate due to eccentricity, and when the rotating moment is larger than the bearing moment of the expansion sleeve, the expansion sleeve is damaged and the test cabin is overturned, so that the test piece is damaged, and even the test cabin or the centrifugal machine is damaged.
Disclosure of Invention
First, the technical problem to be solved
The invention aims to solve the technical problems of rotation of a test cabin caused by deviation of the center of mass of a test piece from the center plane of a pin shaft and damage to the pin shaft and related structural members caused by rotation of the test cabin in the conventional centrifugal test.
(II) technical scheme
In order to solve the technical problems, the invention provides an anti-rotation adjusting device for a centrifugal test, which comprises an adjusting pull rod, a first connecting piece and a second connecting piece, wherein the first connecting piece and the second connecting piece are coaxially arranged with the adjusting pull rod, the first connecting piece is fixedly connected with the telescopic end of the adjusting pull rod, and the second connecting piece is rotatably connected with the fixed end of the adjusting pull rod.
The adjusting pull rod comprises a screw rod and a thread sleeve, and the thread sleeve is screwed on the outer side of the screw rod.
The first connecting piece is connected with the end part of the screw rod, and the second connecting piece is connected with the end part of the threaded sleeve.
The first connecting piece is a U-shaped connector, and the U-shaped connector is connected with a threaded hole formed in the large arm of the centrifugal machine through a bolt.
Wherein the second connecting piece is a rotary hanging ring, the rotary lifting ring is connected with the end part of the threaded sleeve through a screw, and the rotary lifting ring is connected with the test cabin.
The rotary hanging ring is connected with the test cabin through a hanging belt.
(III) beneficial effects
The technical scheme of the invention has the following advantages: the anti-rotation adjusting device for the centrifugal test is an anti-rotation fixing device for a test cabin and a test piece under overload and composite environments, the telescopic end of the adjusting pull rod can rotate relative to the fixing section of the adjusting pull rod, so that the whole length of the adjusting pull rod is changed, in the centrifugal test process, the second connecting piece is rotatably connected with the fixed end of the adjusting pull rod, the telescopic end of the adjusting pull rod and the fixed end are prevented from loosening due to excessive relative rotation, the adjusting pull rod always keeps in a pre-tightening state in the centrifugal test process, the rotation of the test cabin caused by mass eccentricity in the centrifugal test process is avoided, the test piece and the test cabin are ensured to always keep a stable position, and the whole centrifugal test is ensured to be carried out safely and reliably. The invention has flexible installation, wide length adjustment range, good stress form of connection of the two ends of the adjusting pull rod, can realize rotation adjustment, is convenient to use, is safe and reliable, and fully meets the use requirement.
In addition to the technical problems, features of the constituent technical solutions and advantages brought by the technical features of the technical solutions described above, other technical features of the present invention and advantages brought by the technical features of the technical solutions, further description will be made with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic structural view of an anti-rotation adjustment device for a centrifugal test according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of an anti-rotation adjustment device for a centrifugal test according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an application of the anti-rotation adjustment device for a centrifugal test according to an embodiment of the present invention.
In the figure: 1: adjusting the pull rod; 2: a first connector; 3: second one a connecting piece; 4: a centrifuge large arm; 5: a test cabin; 6:11: a screw; 12: a thread sleeve; 21: a U-shaped joint; 22: a bolt; 31: rotating the hanging ring; 32: and (5) a screw.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more clear, in the following description of the embodiments of the invention, a technical solution in the embodiments of the present invention will be clearly and completely described, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality", "a plurality of groups" means two or more, and the meaning of "a plurality", "a plurality of roots", "a plurality of groups" means one or more.
As shown in fig. 1, the anti-rotation adjusting device for the centrifugal test provided by the embodiment of the invention comprises an adjusting pull rod 1, a first connecting piece 2 and a second connecting piece 3, wherein the first connecting piece 2 and the second connecting piece 3 are coaxially arranged with the adjusting pull rod 1, the first connecting piece 2 is fixedly connected with the telescopic end of the adjusting pull rod 1, and the second connecting piece 3 is rotatably connected with the fixed end of the adjusting pull rod 1.
The anti-rotation adjusting device for the centrifugal test is an anti-rotation fixing device for a test cabin and a test piece under overload and composite environments, the telescopic end of the adjusting pull rod can rotate relative to the fixing section of the adjusting pull rod, so that the whole length of the adjusting pull rod is changed, in the centrifugal test process, the second connecting piece is rotatably connected with the fixed end of the adjusting pull rod, the telescopic end of the adjusting pull rod and the fixed end are prevented from loosening due to excessive relative rotation, the adjusting pull rod always keeps in a pre-tightening state in the centrifugal test process, the rotation of the test cabin caused by mass eccentricity in the centrifugal test process is avoided, the test piece and the test cabin are ensured to always keep a stable position, and the whole centrifugal test is ensured to be carried out safely and reliably. The invention has flexible installation, wide length adjustment range, good stress form of connection of the two ends of the adjusting pull rod, can realize rotation adjustment, is convenient to use, is safe and reliable, and fully meets the use requirement.
Specifically, as shown in fig. 2, the adjusting lever 1 includes a screw 11 and a threaded sleeve 12, the thread bush 12 is screwed on the outer side of the screw 11. Wherein the first connecting piece 2 is connected with the end of the screw 11, and the second connecting piece 3 is connected with the end of the thread bush 12. The extending movable end of the screw rod is connected with the first connecting piece, the fixed end of the threaded sleeve is connected with the second connecting piece, the screw rod is screwed with the threaded sleeve, and the screw rod can be screwed in or out relative to the threaded sleeve, so that the length adjusting range of the adjusting pull rod is 700-1200 mm. The size of the adjusting pull rod is set according to the size of the rotating hanging ring selected by design, the rotating hanging ring is a huge-force rigging standard part, the threaded connection strength and the strength of the pull rod are ensured, the adjusting range is enlarged, and the installation availability condition is improved.
Further, as shown in fig. 2 and 3, the first connecting piece 2 is a U-shaped connector 21, and the U-shaped connector 21 is connected with a threaded hole provided on the large arm 4 of the centrifuge through a bolt 22. The second connecting piece 3 is a rotary hanging ring 31, the rotary hanging ring 31 is connected with the end part of the threaded sleeve 12 through a screw 32, and the rotary hanging ring 31 is connected with the test cabin 5. Wherein the rotating suspension ring 31 is connected with the test chamber 5 through a hanging belt. The U-shaped joint of the first connecting piece is connected with a threaded hole of a large arm of the centrifugal machine through a bolt, the rotary hanging ring of the second connecting piece can rotate at the end part of the threaded sleeve without separating, the hanging ring is connected to the rotary hanging ring, the hanging ring is connected with the hanging ring on the test cabin, and the mechanical adjusting device is combined with the hanging ring through the soft and hard combination structure, so that the length adjusting range is wider, the rotary hanging ring is a huge force rigging standard piece, a plurality of threaded holes are formed in the large arm of the centrifugal machine, the hanging ring is also arranged at a plurality of different positions on the test cabin, and the position selection connection can be respectively carried out according to different requirements of different tests.
When the centrifugal machine is used, one end of the adjusting pull rod is connected with the large arm of the centrifugal machine, the large arm end of the centrifugal machine is provided with 6M 20 threaded holes, and according to the pull rod direction shown in fig. 1, the threaded holes are stressed and decomposed into tensile force and shearing force, wherein the shearing force is larger than the tensile force; the other end of the adjusting pull rod is connected with a hanging belt, and the other end of the hanging belt is connected with a hanging ring on a threaded hole of the test cabin M14/the tool M24.
The breaking load of the large arm M20 of the centrifugal machine, the test cabin M14 and the lifting ring of the tool M24 is shown in the following table.
From the table, the shearing breaking load of the lifting ring of the test cabin M14 is 3.33 tons, the single breaking load of the lifting belt of 4 tons is 4 tons, the adjusting pull rod breaking load of 7.37 tons is matched with the shearing breaking load of the lifting ring of the large arm M20 of the centrifugal machine by 7.35 tons, and the margin of shearing the lifting ring of the tool M24 by 10.6 tons is sufficient. Therefore, the hanging strip can be folded for use, 1M 14 hanging ring is respectively connected to two ends of the hanging strip when the hanging strip is connected with the test cabin, 1M 24 hanging ring is connected after the hanging strip is folded when the hanging strip is connected with the tool, and the adjusting pull rod is connected with the M20 threaded hole of the big arm of the centrifugal machine through the U-shaped connector. Thus, load matching can be realized, the single anti-rotation tensile force is more than 6.67 tons, the 2 adjusting pull rods on one plane are more than 13.34 tons, and eccentric bending moment of about 133400Nm can be prevented.
Safety factor and (3) calculating:
and (3) connecting a test cabin: when the eccentric moment is smaller than 33350Nm and only one M14 hanging ring is used for connection,
when 2M 14 slings are used,
centrifuge big arm end M20 screw hole:
comprehensively considering the minimum safety coefficient of the anti-rotation adjusting device of the whole centrifugal test, the method can be as follows:
when the bending moment of the center of mass of the test piece deviated from the center of the rotating shaft is smaller than 33350Nm, the test piece can be connected by only one test cabin M14 hanging ring, and the safety coefficient is 2.73;
when the bending moment of the center of mass of the test piece deviated from the center of the rotating shaft is larger than 33350Nm, namely, the test piece is connected by using 2 test cabins M14 hanging rings, the safety coefficient is 5.46;
when the pull rod is adjusted to be connected with the threaded hole of the test tool M24, the safety coefficient of the whole anti-rotation system is 5.70.
In summary, the anti-rotation adjusting device for the centrifugal test is an anti-rotation fixing device for a test cabin and a test piece under overload and composite environments, and in the centrifugal test process, the telescopic end of the adjusting pull rod can rotate and move relative to the fixing section of the adjusting pull rod under stress, so that the whole length of the adjusting pull rod is changed, the second connecting piece is rotatably connected with the fixing end of the adjusting pull rod, the telescopic end of the adjusting pull rod and the fixing end are prevented from loosening due to relative rotation, the adjusting pull rod is kept in a pre-tightening state all the time in the centrifugal test process, the rotation of the test cabin caused by mass eccentricity in the centrifugal test process is avoided, the stable position of the test piece and the test cabin all the time is ensured, and the whole centrifugal test is ensured to be carried out safely and reliably. The invention has flexible installation, wide length adjustment range, good stress form of connection of the two ends of the adjusting pull rod, can realize rotation adjustment, is convenient to use, is safe and reliable, and fully meets the use requirement.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (2)
1. An anti-rotation adjusting device for a centrifugal test is characterized in that: the device comprises an adjusting pull rod, a first connecting piece and a second connecting piece, wherein the first connecting piece and the second connecting piece are coaxially arranged with the adjusting pull rod, the first connecting piece is fixedly connected with the telescopic end of the adjusting pull rod, and the second connecting piece is rotatably connected with the fixed end of the adjusting pull rod;
the adjusting pull rod comprises a screw rod and a thread sleeve, and the thread sleeve is screwed on the outer side of the screw rod; the first connecting piece is connected with the end part of the screw rod, and the second connecting piece is connected with the end part of the threaded sleeve;
the first connecting piece is a U-shaped connector, and the U-shaped connector is connected with a threaded hole arranged on the large arm of the centrifugal machine through a bolt; the second connecting piece is a rotary hanging ring, the rotary hanging ring is connected with the end part of the threaded sleeve through a screw, and the rotary hanging ring is connected with the test cabin.
2. The centrifugal test anti-rotation adjustment device according to claim 1, wherein: the rotary hanging ring is connected with the test cabin through a hanging belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710015759.0A CN106644450B (en) | 2017-01-10 | 2017-01-10 | Anti-rotation adjusting device for centrifugal test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710015759.0A CN106644450B (en) | 2017-01-10 | 2017-01-10 | Anti-rotation adjusting device for centrifugal test |
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| Publication Number | Publication Date |
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| CN106644450A CN106644450A (en) | 2017-05-10 |
| CN106644450B true CN106644450B (en) | 2023-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710015759.0A Active CN106644450B (en) | 2017-01-10 | 2017-01-10 | Anti-rotation adjusting device for centrifugal test |
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| CN113883337B (en) * | 2021-09-26 | 2023-03-24 | 山东华尔泰建筑工程有限公司 | Be applied to fire pipeline erection mechanism in spherical rack steel construction workshop of individual layer |
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