CN102652929A - Online dynamic balance regulating mechanism of geotechnical centrifuge - Google Patents
Online dynamic balance regulating mechanism of geotechnical centrifuge Download PDFInfo
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- CN102652929A CN102652929A CN2012101129133A CN201210112913A CN102652929A CN 102652929 A CN102652929 A CN 102652929A CN 2012101129133 A CN2012101129133 A CN 2012101129133A CN 201210112913 A CN201210112913 A CN 201210112913A CN 102652929 A CN102652929 A CN 102652929A
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Abstract
The invention discloses an online dynamic balance regulating mechanism of a geotechnical centrifuge. The online dynamic balance regulating mechanism comprises an imbalance force monitoring device, a dynamic balance regulating device and a dynamic balance counterweight block, wherein the dynamic balance regulating device comprises a balance controller, a motor, a screw lifting machine and a flange, the signal end of the balance controller is respectively connected between the control signal input ends of the imbalance force monitoring device and the motor, a rotating shaft of the motor and an input shaft of the screw lifting machine are connected through a shaft coupling, the flange is mounted on a screw rod of the screw lifting machine through a center hole of the flange, the flange is in threaded connection with the screw rod, and the outer side of the flange is connected with the dynamic balance counterweight block. The online dynamic balance regulating mechanism disclosed by the invention adopts the motor as a power source so as to facilitate the continuous providing of energy by utilizing a mature electric slip ring technology; and the screw lifting machine is adopted as an execution element, so that the online dynamic balance regulating mechanism can meet not only the dynamic regulation function under a centrifugal field, but also the power outage self-locking function under a balanced state, and has the advantages of realizing high regulation precision, being stable and reliable to work and saving electrical energy.
Description
Technical field
The present invention relates to a kind of line dynamic balance adjustment mechanism, relate in particular to a kind of geotechnical centrifuge line dynamic balance adjustment mechanism.
Background technology
The geotechnical centrifugal model test technology is the strong instrument of the many reluctant geotechnological problems of research; But direct physical is approximate or be used for checking, the calibration of the computer program of prototype system subsequent analysis, and geotechnological modeling is very useful for development and the basic mechanical behavior of understanding the large geotechnical system.Centrifugal model test also can be used as effective supplemental tool of conventional design and analytical technology, and the application in scientific research and engineering practice is increasingly extensive.In the last few years; China's geotechnical centrifugal model test science and technology has been made significant headway; Increasing demand to large geotechnical centrifuge increases; Constantly setting up the project in colleges and universities and scientific research institutions, to build large geotechnical centrifuge be exactly to prove that well for example: priorities such as Tongji University, Zhejiang University, Chengdu University of Technology, institute of wuhan yangtze river water section have all been set up large geotechnical centrifuge.
The line dynamic equilibrium problem of geotechnical centrifuge is the problem that the geotechnical centrifuge design must be considered and need to solve always.Otherwise, because bigger unbalance loading will cause vibration equipment, gently then shorten service life of equipment, heavy then cause fatal crass, building collapsing.So the practicable line dynamic balance adjustment mechanism of design studies has the important project using value.
On geotechnical centrifuge; The on-line dynamic balancing governor motion of the domestic use of China has two kinds: a kind of is the hydraulic regulation balanced controls, and executive component is a hydraulic cylinder, and the piston rod of hydraulic cylinder is connected with the dynamic equilibrium balancing weight; Linear reciprocating motion through piston rod is passed the dynamic equilibrium balancing weight; Change its position on the centrifuge pivoted arm, thereby architecture quality is distributed again, realize that the barycenter of centrifugal basket arm system overlaps with center of rotation; Another kind is an air pressure adjustment mechanism, and its basic structure is at the two ends of pivoted arm water tank to be set, and air bag is set in the water tank, and two water tanks store certain water gaging and use pipeline connection; Through regulating the water yield that air bag air pressure is regulated two water tanks, and then realize pivoted arm left and right sides balance adjustment.In above-mentioned two kinds of on-line dynamic balancing governor motions, the defective of hydraulic regulation balanced controls is: degree of regulation is relatively low, and reliability is unstable; The defective of air pressure adjustment mechanism is: complex structure, and regulated quantity is limited and external applied load extra increase is big, and reliability is also unstable.In addition; More than two kinds of adjustment structures all must carry fluid (gases at high pressure or high-pressure and hydraulic oil) from ground to the rotation horn through swivel joint; Yet; Or geotechnical centrifugal model test often needs operation continuously 12 hours 24 hours, even stream time is longer, and swivel joint will satisfy that to work long hours and keep fine sound high pressure sealing be difficulty very.The service life of swivel joint and the actual demand of soil test are not complementary, and the steady operation performance of system is difficult to satisfy the main frame running requirements.
Other geotechnical centrifuge line dynamic balance adjustment mechanism is not seen domestic report at present, comprises patent documentation and other non-patent literature.
Summary of the invention
The object of the invention just is to provide in order to address the above problem the geotechnical centrifuge line dynamic balance adjustment mechanism of a kind of degree of regulation height, stable performance.
In order to achieve the above object, the present invention has adopted following technical scheme:
The present invention includes out-of-balance force monitoring device, dynamic equilibrium adjusting device and dynamic equilibrium balancing weight; The signal output part of said out-of-balance force monitoring device is connected with the control signal input of said dynamic equilibrium adjusting device, and the clutch end of said dynamic equilibrium adjusting device is connected with said dynamic equilibrium balancing weight; Said dynamic equilibrium adjusting device comprises balance controller, motor, spiral lift and flange; The control signal input of said balance controller is connected with the signal output part of said out-of-balance force monitoring device; The control signal input of said motor is connected with the control signal output of said balance controller; The rotating shaft of said motor is connected through shaft coupling with the power shaft of said spiral lift; Said flange is installed in through its centre bore on the screw rod of said spiral lift, and through being threaded, the outside of said flange is connected with said dynamic equilibrium balancing weight between said flange and the said screw rod.
When being in non-equilibrium state, geotechnical centrifuge acquires a certain degree, such as: when out-of-balance force reached 2-3t, the out-of-balance force monitoring device can be exported corresponding induced signal and balance controller; Under the control of balance controller, motor begins rotation, the direction of motor rotation and the length of working time; Direction according to detected out-of-balance force is confirmed with size; The rotary power of motor passes to spiral lift after through its rotating shaft, shaft coupling, and the power shaft of spiral lift begins rotation, after the inner break-in power transmission of spiral lift; The screw rod of spiral lift begins rotation; Because through being threaded, move on screw rod so the rotary power of screw rod can drive flange between screw rod and the flange, its moving direction is the axial direction of screw rod; Flange drives the dynamic equilibrium balancing weight and moves, thereby realizes geotechnical centrifuge is carried out the purpose that dynamic equilibrium is regulated.After being adjusted to poised state, under the control of balance controller, the detection signal of out-of-balance force monitoring device can not output to motor; Thereby make motor and spiral lift out of service, it is moving that the dynamic equilibrium balancing weight stops migration, the locking poised state; Whole governor motion remains static; Be in non-equilibrium state once more and acquire a certain degree up to geotechnical centrifuge, such as: when out-of-balance force reached 2-3t, whole governor motion repeated said process again.Concrete out-of-balance force plays the centrifuge principal axis design strength decision of tone pitch by main frame.The power supply of motor transmits electric energy through electric slip ring, and this technology is very ripe, has guaranteed reliability of operation of the present invention.
Further, the termination of said screw rod is installed in through bearing in the centre bore of locating ring of said geotechnical centrifuge.Bearing can bear the pulling force of centrifugal overload, guarantees safe operation of the present invention.
As preferably, said dynamic equilibrium balancing weight is sleeved on the thrust axis of said geotechnical centrifuge and can moves at the axial direction of said thrust axis; Be provided with guide-soft-band between said dynamic equilibrium balancing weight and the said thrust axis.The two ends of dynamic equilibrium balancing weight are set with on two thrust axis that are parallel to each other; Thrust axis is not only the guiding mechanism of dynamic equilibrium balancing weight even running; Also be the load carrier of dynamic equilibrium balancing weight suffered tangential force under the high overload centrifugal field simultaneously, make whole system more steady when operation.
Particularly, said balance controller can be central processing unit, can realize automatic control fully like this.
Said balance controller also can comprise display and hand switch, and the signal input part of said display is connected with the signal output part of said out-of-balance force monitoring device, and said hand switch is connected with the control signal input of said motor; Further, said balance controller also comprises alarm, and the signal input part of said alarm is connected with the signal output part of said out-of-balance force monitoring device.This structure can realize that administrative staff understand non-equilibrium state according to video or audio signal, manually controls the operation of motor again, reaches the purpose of geotechnical centrifuge line dynamic balance adjustment.
As preferably, said motor is a reducing motor.The more stable work of reducing motor is reliable.
Beneficial effect of the present invention is:
The present invention adopts motor as power source, is convenient to utilize ripe electric slip ring technology to continue to provide the energy, can adapt to long-time line dynamic balance adjustment; Adopt spiral lift to be used as executive component, not only satisfied the dynamic adjustments function under the centrifugal field, and satisfied the function that cuts off self-lock under the poised state, not only degree of regulation is high, and working stability is reliable, and has practiced thrift electric energy; Termination through at screw rod is provided with bearing, can bear the pulling force of centrifugal overload, guarantees safe operation of the present invention; With the thrust axis is guiding and tangential load carrier, through between dynamic equilibrium balancing weight and thrust axis, being provided with guide-soft-band, when having satisfied instructions for use, simplifies the structure, and has reduced cost; Each element of system can both be dismantled easily, is easy to repair and maintenance or replacing.
Description of drawings
Fig. 1 is the perspective view during geotechnical centrifuge line dynamic balance adjustment mechanism according to the invention is used;
Fig. 2 is geotechnical centrifuge line dynamic balance adjustment mechanism according to the invention cuing open in the screw axial direction
The TV structure sketch map.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is made further specific descriptions:
As depicted in figs. 1 and 2; The out-of-balance force monitoring device that the present invention includes on the thrust axis 5 that is installed on geotechnical centrifuge (all has application in traditional hydraulic regulator; So not shown), dynamic equilibrium adjusting device and dynamic equilibrium balancing weight 6; Said dynamic equilibrium adjusting device comprises balance controller (not shown), reducing motor 3, spiral lift 1 and flange 7; The control signal input of balance controller is connected with the signal output part of out-of-balance force monitoring device; The control signal input of reducing motor 3 is connected with the control signal output of balance controller, and the rotating shaft of reducing motor 3 is connected through shaft coupling 2 with the power shaft of spiral lift 1, and flange 7 is installed on the screw rod 8 of spiral lift 1 through its centre bore; Between flange 7 and the screw rod 8 through being threaded; The outside of flange 7 is connected with dynamic equilibrium balancing weight 6, and dynamic equilibrium balancing weight 6 is sleeved on the thrust axis 5 of geotechnical centrifuge and can moves at the axial direction of thrust axis 5, is provided with the guide-soft-band (not shown) between dynamic equilibrium balancing weight 6 and the thrust axis 5.Reducing motor 3 all is fixedly mounted on the body 4 of geotechnical centrifuge with spiral lift 1.
Based on the actual application requirements, balance controller can be the central processing unit (not shown), can realize automatic control fully like this; Balance controller also can comprise display, alarm and hand switch (not shown); The signal input part of display and alarm is connected with the signal output part of out-of-balance force monitoring device; Hand switch is connected with the control signal input of reducing motor 3; This structure can realize that administrative staff understand non-equilibrium state according to video information that comes from display or the audio signal that comes from alarm; Manually control the operation of reducing motor 3 again, reach the purpose of geotechnical centrifuge line dynamic balance adjustment.
As shown in Figure 2, the termination of screw rod 8 is installed in through bearing 10 in the centre bore of locating ring 9 of geotechnical centrifuge.Bearing 10 can bear the pulling force of centrifugal overload, guarantees safe operation of the present invention.
In conjunction with Fig. 1 and Fig. 2, operation principle of the present invention is following: when geotechnical centrifuge is in non-equilibrium state and acquires a certain degree, such as: out-of-balance force reaches 2-3t, and (out-of-balance force hour geotechnical centrifuge can bear; Need not regulate, otherwise regulating frequency is too high) time, the out-of-balance force monitoring device can be exported corresponding induced signal and balance controller; Under the control of balance controller, reducing motor 3 begins rotation, the direction of reducing motor 3 rotations and the length of working time; Direction according to detected out-of-balance force is confirmed with size; The rotary power of reducing motor 3 passes to spiral lift 1 after through its rotating shaft, shaft coupling 2, and the power shaft of spiral lift 1 begins rotation, after the inner break-in power transmission of spiral lift 1; The screw rod 8 of spiral lift 1 begins rotation; Because through being threaded, so that the rotary power of screw rod 8 can drive flange 7 is mobile on screw rod 8, its moving direction is the axial direction of screw rod 8 between screw rod 8 and the flange 7; Flange 7 drives dynamic equilibrium balancing weight 6 and moves, thereby realizes geotechnical centrifuge is carried out the purpose of line dynamic balance adjustment.After being adjusted to poised state, under the control of balance controller, the detection signal of out-of-balance force monitoring device can not output to reducing motor 3; Thereby make reducing motor 3 and spiral lift 1 out of service, it is moving that dynamic equilibrium balancing weight 6 stops migration, the locking poised state; Whole governor motion remains static; Be in non-equilibrium state once more and acquire a certain degree up to geotechnical centrifuge, such as: when out-of-balance force reached 2-3t, whole governor motion repeated said process again.The power supply of reducing motor 3 transmits electric energy through the electric slip ring (not shown), and this technology is very ripe, has guaranteed reliability of operation of the present invention.
Claims (8)
1. geotechnical centrifuge line dynamic balance adjustment mechanism; Comprise out-of-balance force monitoring device, dynamic equilibrium adjusting device and dynamic equilibrium balancing weight; The signal output part of said out-of-balance force monitoring device is connected with the control signal input of said dynamic equilibrium adjusting device, and the clutch end of said dynamic equilibrium adjusting device is connected with said dynamic equilibrium balancing weight; It is characterized in that: said dynamic equilibrium adjusting device comprises balance controller, motor, spiral lift and flange; The control signal input of said balance controller is connected with the signal output part of said out-of-balance force monitoring device; The control signal input of said motor is connected with the control signal output of said balance controller; The rotating shaft of said motor is connected through shaft coupling with the power shaft of said spiral lift; Said flange is installed in through its centre bore on the screw rod of said spiral lift, and through being threaded, the outside of said flange is connected with said dynamic equilibrium balancing weight between said flange and the said screw rod.
2. geotechnical centrifuge line dynamic balance adjustment mechanism according to claim 1 is characterized in that:
The termination of said screw rod is installed in through bearing in the centre bore of locating ring of said geotechnical centrifuge.
3. geotechnical centrifuge line dynamic balance adjustment mechanism according to claim 1 is characterized in that:
Said dynamic equilibrium balancing weight is sleeved on the thrust axis of said geotechnical centrifuge and can moves at the axial direction of said thrust axis.
4. geotechnical centrifuge line dynamic balance adjustment mechanism according to claim 3 is characterized in that:
Be provided with guide-soft-band between said dynamic equilibrium balancing weight and the said thrust axis.
5. geotechnical centrifuge line dynamic balance adjustment mechanism according to claim 1 is characterized in that:
Said balance controller is a central processing unit.
6. geotechnical centrifuge line dynamic balance adjustment mechanism according to claim 1 is characterized in that:
Said balance controller comprises display and hand switch, and the signal input part of said display is connected with the signal output part of said out-of-balance force monitoring device, and said hand switch is connected with the control signal input of said motor.
7. geotechnical centrifuge line dynamic balance adjustment mechanism according to claim 6 is characterized in that:
Said balance controller also comprises alarm, and the signal input part of said alarm is connected with the signal output part of said out-of-balance force monitoring device.
8. according to claim 1 or 6 described geotechnical centrifuge line dynamic balance adjustment mechanisms, it is characterized in that: said motor is a reducing motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012101129133A CN102652929A (en) | 2012-04-17 | 2012-04-17 | Online dynamic balance regulating mechanism of geotechnical centrifuge |
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| CN2012101129133A CN102652929A (en) | 2012-04-17 | 2012-04-17 | Online dynamic balance regulating mechanism of geotechnical centrifuge |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107694771A (en) * | 2017-11-14 | 2018-02-16 | 中国工程物理研究院总体工程研究所 | A kind of geotechnical centrifuge gravity-center adjustable counter weight device |
| CN108772211A (en) * | 2018-07-27 | 2018-11-09 | 中国工程物理研究院总体工程研究所 | Geotechnical centrifuge dynamic equilibrium regulating system |
| CN108828191A (en) * | 2018-08-14 | 2018-11-16 | 中国工程物理研究院总体工程研究所 | A kind of geotechnical centrifuge modularization tension beam |
| CN109569900A (en) * | 2019-01-25 | 2019-04-05 | 中国工程物理研究院总体工程研究所 | A kind of geotechnical centrifuge self balancing device |
Citations (3)
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| JPH0313862A (en) * | 1989-06-12 | 1991-01-22 | Taisei Corp | Centrifugal loading apparatus |
| EP0744611A1 (en) * | 1991-06-11 | 1996-11-27 | Andrew N. Schofield And Associates Limited | Centrifuges, especially for geotechnical testing methods |
| CN202570440U (en) * | 2012-04-17 | 2012-12-05 | 中国工程物理研究院总体工程研究所 | Online dynamic balancing adjustment mechanism for geotechnical centrifuges |
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2012
- 2012-04-17 CN CN2012101129133A patent/CN102652929A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0313862A (en) * | 1989-06-12 | 1991-01-22 | Taisei Corp | Centrifugal loading apparatus |
| EP0744611A1 (en) * | 1991-06-11 | 1996-11-27 | Andrew N. Schofield And Associates Limited | Centrifuges, especially for geotechnical testing methods |
| CN202570440U (en) * | 2012-04-17 | 2012-12-05 | 中国工程物理研究院总体工程研究所 | Online dynamic balancing adjustment mechanism for geotechnical centrifuges |
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| 张鸣雷: "《土工离心机自动平衡系统设计》", 《中国水利学会2007学术年会物理模拟技术在岩土工程中的应用分会场论文集》 * |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107694771A (en) * | 2017-11-14 | 2018-02-16 | 中国工程物理研究院总体工程研究所 | A kind of geotechnical centrifuge gravity-center adjustable counter weight device |
| CN107694771B (en) * | 2017-11-14 | 2024-05-10 | 中国工程物理研究院总体工程研究所 | Adjustable gravity center counterweight device of geotechnical centrifuge |
| CN108772211A (en) * | 2018-07-27 | 2018-11-09 | 中国工程物理研究院总体工程研究所 | Geotechnical centrifuge dynamic equilibrium regulating system |
| CN108828191A (en) * | 2018-08-14 | 2018-11-16 | 中国工程物理研究院总体工程研究所 | A kind of geotechnical centrifuge modularization tension beam |
| CN108828191B (en) * | 2018-08-14 | 2024-01-30 | 中国工程物理研究院总体工程研究所 | Modular tension beam of geotechnical centrifuge |
| CN109569900A (en) * | 2019-01-25 | 2019-04-05 | 中国工程物理研究院总体工程研究所 | A kind of geotechnical centrifuge self balancing device |
| CN109569900B (en) * | 2019-01-25 | 2023-12-22 | 中国工程物理研究院总体工程研究所 | Self-balancing device of geotechnical centrifuge |
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