CN102042911A - Sine cyclic loading device - Google Patents
Sine cyclic loading device Download PDFInfo
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- CN102042911A CN102042911A CN2010105366853A CN201010536685A CN102042911A CN 102042911 A CN102042911 A CN 102042911A CN 2010105366853 A CN2010105366853 A CN 2010105366853A CN 201010536685 A CN201010536685 A CN 201010536685A CN 102042911 A CN102042911 A CN 102042911A
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- fixed pulley
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- swingle
- rope
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Abstract
The invention discloses a sine cyclic loading device comprising a fixed support, a second weight, a first fixed pulley, a second fixed pulley and a driving part, wherein the first fixed pulley and the second fixed pulley are respectively fixed and installed on the fixed support; the driving part comprises an electric motor, a lever, a rotating rod and a first weight, one end of the lever is articulated with the fixed support, an output shaft of the electric motor passes through the other end of the lever, the end part of the output shaft of the electric motor is fixedly connected with one end of the rotating rod, and the other end of the rotating rod is fixedly connected with the first weight; the lever is connected with one end of a first rope passing through the first fixed pulley, and the second weight is connected with one end of a second rope passing through the second fixed pulley. The sine cyclic loading device has simple and practical structure and can provide accurate and stable bidirectional sine cyclic load, and the frequency of cyclic loading can be more than one billion.
Description
Technical field
The present invention relates to a kind of charger, particularly a kind of sinusoidal cyclic load charger.
Background technology
Under the cyclic load effect, structure can produce and the visibly different action effect of static load.Owing to be subjected to the restriction of side direction loading equipemtn condition, and the complicacy of CYCLIC LOADING problem itself, present experimental study to the works that bears the cyclic load effect is less.
Simultaneously, to the analysis of structural fatigue effect, be the pith of structural design, to improving reliability of structure and crucial meaning being arranged serviceable life, torture test is a research fatigue effect important method.
The method of CYCLIC LOADING mainly adopts vibrator or actuator at present, by applying of data acquisition FEEDBACK CONTROL load, yet, this class apparatus structure complexity, operability is not strong, and the regular degree of the sinusoidal cyclic load of output is limited by feedback controling equipment, simultaneously, this class device expense in operation and maintenance is higher, is not suitable for applying long-term cyclic load.
Summary of the invention
Technical matters to be solved by this invention provides a kind of simple and practical sinusoidal cyclic load charger.
The technical solution adopted for the present invention to solve the technical problems is: this sine cyclic load charger comprises hold-down support, second weight, first fixed pulley, second fixed pulley and drive part, and described first fixed pulley, second fixed pulley are fixedly mounted on the hold-down support respectively; Described drive part comprises motor, lever, swingle and first weight, one end and the hold-down support of described lever are hinged, the output shaft of motor runs through the other end of described lever, fixedly connected with an end of swingle in the end of the output shaft of described motor, the other end of described swingle is fixedlyed connected with first weight; Described lever is connected with an end of first rope that passes first fixed pulley, and described second weight is connected with an end of second rope that passes second fixed pulley.
Compared with prior art, the invention has the beneficial effects as follows:
(1) this device is applicable to the sinusoidal cyclic load that works is applied rule.
(2) this device unitary construction is simple, is easy to install, and expense is low, and loading procedure is stable, can provide cycle index greater than 1,000,000 times sinusoidal cyclic load exactly, has remedied the deficiency of structural test research under the cyclic load effect.
(3) this device can provide two-way sinusoidal cyclic load.
Description of drawings
Fig. 1 is a structural principle synoptic diagram of the present invention.
Fig. 2 is the duty vertical view of drive part of the present invention.
Among the figure: 1, second weight, 2, second rope, 3, first rope, 4, first weight, 5, first fixed pulley, 6, second fixed pulley, 7, hinge, 8, lever, 9, motor, 10, swingle, 11, hold-down support, 12, the first weight movement locus line.
Embodiment
Further set forth concrete scheme of the present invention below in conjunction with accompanying drawing.
Referring to Fig. 1, the present invention includes hold-down support 11, second weight 1 and the drive part, described drive part comprises motor 9, lever 8, swingle 10 and first weight 4, hold-down support 11 is as the stiff end of whole device, one end of lever 8 and hold-down support 11 are hinged by hinge 7, the output shaft of motor 9 runs through the other end of lever 8, fixedlys connected with an end of swingle 10 in the end of the output shaft of motor 9.Motor 9 makes swingle 10 move in a circle as power source by its output shaft, and the other end of swingle 10 is fixedlyed connected with first weight 4, and swingle 10 drives first weight 4 moves in a circle simultaneously thus.Lever 8 is connected with an end of first rope 3 that passes first fixed pulley 5, and second weight 1 is connected with an end of second rope 2 that passes second fixed pulley 6.
During use, make works 12 between first fixed pulley 5 and second fixed pulley 6, lever 8 is connected with the loading position of works 12 by first rope 3 that passes first fixed pulley 5, pulling force by 3 transmission of first rope, to works 12 load applications, the junction of the lever 8 and first rope 3 can be positioned at any place on the lever 8, and second weight 1 is connected with the loading position of works 12 by second rope 2 that passes second fixed pulley 6.
Principle of work of the present invention is as follows:
Referring to Fig. 1, second weight 1 of sinusoidal cyclic load charger of the present invention is connected on the works 12 by an end of second rope 2 of second pulley 6, first weight 4 is connected on the motor 9 by swingle 10, and 8 first ropes 3 by first pulley 5 of lever are connected with works 12.A part of weight of second weight 1 is used for the weight of balanced lever 8, motor 9 and swingle 10 by rope pull, makes that lever 8 remains horizontality in the whole loading procedure; The tensile force f that another part weight of second weight 1 makes 2 generations of second rope
3Act on the works 12.After on-test, starter motor 9, the first weights 4 are done the circular motion on the surface level along with swingle 10 rotates together.As shown in Figure 2, first weight 4 is in a certain moment position on the circular motion, and broken circle is the movement locus line 12 of first weight 4.According to principle of moment balance, first rope 3 and first weight 4 apply tensile force f upwards to lever 8 respectively
1With downward tensile force f
2, tensile force f
1And F
2The lever 8 and the pin joint of hold-down support 11 are got square, obtain relational expression (1):
F
1＝F
2·(b·cos?θ+a+c)/a (1)
In the formula (1), a represents that the pin joint of lever 8 and hold-down support 11 is to the distance of first rope 3 with lever 8 tie points, b represents the distance of the tie point of the end of motor 9 output shafts and swingle 10 to swingle 10 and first weight, 4 tie points, c represents the tie point of the end of output shaft of motor 9 and swingle 10 to the distance of first rope 3 with lever 8 tie points, and θ represents the center line of lever 8 and the angle of swingle 10 center lines.
Sinusoidal and cosine can exchange, by formula (1) as can be known, and tensile force f
1Be sinusoidal circulation change, thus, pass through tensile force f
1And tensile force f
3Acting in conjunction can apply two-way sinusoidal cyclic load to works 12.
Unitary construction of the present invention is simple, be easy to install, loading procedure is stable, because being the variation by rope pull, the cyclic load that works 12 is applied produces, so, only need the size that two weight of heavy of control just can the Control Circulation load, this accuracy that has guaranteed that apparatus of the present invention load applies is very high; Simultaneously, motor 9 stable runnings can make swingle 8 do circular motion steady in a long-term, and this has guaranteed that apparatus of the present invention can provide cycle index greater than 1,000,000 times sinusoidal cyclic load.
Claims (1)
1. sinusoidal cyclic load charger, it is characterized in that: comprise hold-down support (11), second weight (1), first fixed pulley (5), second fixed pulley (6) and drive part, described first fixed pulley (5), second fixed pulley (6) are fixedly mounted on respectively on the hold-down support (11); Described drive part comprises motor (9), lever (8), swingle (10) and first weight (4), one end of described lever (8) and hold-down support (11) are hinged, the output shaft of motor (9) runs through the other end of described lever (8), fixedly connected with an end of swingle (10) in the end of the output shaft of described motor (9), the other end of described swingle (10) is fixedlyed connected with first weight (4); Described lever (8) is connected with an end of first rope (3) that passes first fixed pulley (5), and described second weight (1) is connected with an end of second rope (2) that passes second fixed pulley (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010536685 CN102042911B (en) | 2010-11-09 | 2010-11-09 | Sine cyclic loading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010536685 CN102042911B (en) | 2010-11-09 | 2010-11-09 | Sine cyclic loading device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102042911A true CN102042911A (en) | 2011-05-04 |
| CN102042911B CN102042911B (en) | 2013-09-18 |
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ID=43909258
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010536685 Active CN102042911B (en) | 2010-11-09 | 2010-11-09 | Sine cyclic loading device |
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| CN (1) | CN102042911B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192570A (en) * | 2017-06-07 | 2017-09-22 | 浙江大学 | Two-freedom cyclic load analogue means under Elevated Gravity |
| CN109238796A (en) * | 2018-07-23 | 2019-01-18 | 绍兴文理学院 | A kind of three axis sample sample preparation devices of Bidirectional-pressure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB223852A (en) * | 1924-02-20 | 1925-08-20 | Heinrich Schieferstein | Improvements in mechanical systems for the transmission of power in oscillating form |
| DE19532778A1 (en) * | 1995-09-05 | 1997-03-06 | Christian Ullrich | Jointed mounting, allowing adjustment around three independent axes |
| CN101105220A (en) * | 2006-07-14 | 2008-01-16 | 邓晋州 | Reciprocating type lever force-saving synergistic transmission device |
| CN201876371U (en) * | 2010-11-09 | 2011-06-22 | 浙江大学 | Sinusoidal circulation loading device |
-
2010
- 2010-11-09 CN CN 201010536685 patent/CN102042911B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB223852A (en) * | 1924-02-20 | 1925-08-20 | Heinrich Schieferstein | Improvements in mechanical systems for the transmission of power in oscillating form |
| DE19532778A1 (en) * | 1995-09-05 | 1997-03-06 | Christian Ullrich | Jointed mounting, allowing adjustment around three independent axes |
| CN101105220A (en) * | 2006-07-14 | 2008-01-16 | 邓晋州 | Reciprocating type lever force-saving synergistic transmission device |
| CN201876371U (en) * | 2010-11-09 | 2011-06-22 | 浙江大学 | Sinusoidal circulation loading device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192570A (en) * | 2017-06-07 | 2017-09-22 | 浙江大学 | Two-freedom cyclic load analogue means under Elevated Gravity |
| CN109238796A (en) * | 2018-07-23 | 2019-01-18 | 绍兴文理学院 | A kind of three axis sample sample preparation devices of Bidirectional-pressure |
| CN109238796B (en) * | 2018-07-23 | 2020-11-03 | 绍兴文理学院 | Two-way pressurized triaxial sample preparation device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102042911B (en) | 2013-09-18 |
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