CN107694771A - A kind of geotechnical centrifuge gravity-center adjustable counter weight device - Google Patents
A kind of geotechnical centrifuge gravity-center adjustable counter weight device Download PDFInfo
- Publication number
- CN107694771A CN107694771A CN201711124604.7A CN201711124604A CN107694771A CN 107694771 A CN107694771 A CN 107694771A CN 201711124604 A CN201711124604 A CN 201711124604A CN 107694771 A CN107694771 A CN 107694771A
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- Prior art keywords
- screw mandrel
- bearing
- nut
- centrifuge
- support
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- 238000009434 installation Methods 0.000 claims abstract description 7
- 230000033001 locomotion Effects 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 3
- 230000003068 static effect Effects 0.000 abstract description 6
- 230000008859 change Effects 0.000 abstract description 3
- 238000002474 experimental method Methods 0.000 abstract description 3
- 230000002457 bidirectional effect Effects 0.000 abstract 1
- 238000013461 design Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000012360 testing method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000418 atomic force spectrum Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
- B04B9/14—Balancing rotary bowls ; Schrappers
Abstract
The invention discloses a kind of geotechnical centrifuge gravity-center adjustable counter weight device, belong to geotechnical centrifuge field, it can be fixed between the device and centrifuge by the flange on support, designed for Demountable, driven by remote-control motor, the position of mass can be adjusted under centrifuge dynamic or static conditions to realize balance adjustment；Bidirectional balanced regulation can be realized, i.e. mass can move back and forth along screw mandrel length direction, during overcoming experiment, due to influence of model itself change of configuration for equipment whole machine balancing；By changing mass, it is possible to achieve the balance adjustment of geotechnical centrifuge different scales and scope；The device can both use on suspended centrifugal, can also be used on platform-type centrifuge, and installation is extremely convenient.
Description
Technical field
The invention belongs to geotechnical centrifuge field, and in particular to a kind of geotechnical centrifuge gravity-center adjustable counter weight device.
Background technology
Geotechnical centrifuge is with being mainly used in rock-soil mechanics side slope intensity, dam bursting, novel ocean platform, earth structure
Experimental study should be waited by ringing.In order to ensure that the imbalance that its main shaft is subject in geotechnical centrifuge running is smaller with joint efforts, generally
Trim is carried out to it before operation.
Trim is carried out to centrifuge before operation, employs static trim principle, it will match somebody with somebody when centrifuging machine host design
Leveling device is individually designed as independent particle system progress, and the advantage is that can carry out matched design according to centrifuge scale etc..
The design of this kind of static balancing device mainly has following several schemes：
Scheme one：Centrifuge pivoted arm is Length discrepancy pivoted arm, and centrifuge pull strap is made into screw structure, screw mandrel at galianconism end
On endoporus is installed the matched synchronous belt wheel structure of nut is made, belt wheel is connected by timing belt with motor；It is pre-designed
Fixed weight mass be arranged on belt wheel on；Before centrifuge operation, by reading pivoted arm intermediate rocker force cell reading
And carry out that weight mass block displacement is calculated, by running motor so that weight mass edge can be achieved in belt wheel rotation
The motion of pivoted arm radial direction, so as to reach the purpose of centrifuge balance.
Scheme two：And the structure type using feed screw nut, fixed weight mass is arranged on nut, centrifuge
Before operation, amount of unbalance is read by force cell, mass adjustment distance is obtained, handwheel is then stirred by manpower, it is real
Existing trim.
Scheme three：Test model and main counterweight be installed respectively in the hanging basket at geotechnological vibration centrifugal pivoted arm both ends, in pivoted arm
Between position periphery be provided with by motor-driven feed screw nut's kinematic pair drive trim Mass movement, realize centrifuge running
In balance.
Scheme four：By installing counterweight water tank in the hanging basket of centrifuge pivoted arm one end, pacify in centrifuge pivoted arm middle part
Water controller, magnetic valve, flowmeter etc. are put, centrifuge realizes the control of water tank inner storing water amount by folding magnetic valve when running
System, so as to realize the trim to centrifuge.
The shortcomings that above-mentioned design is：The design of scheme one and two, centrifuge is indivisible with flat structure and centrifuge main body,
And regulation can only be balanced in a static condition；Scheme three is then because its design philosophy is namely based on to centrifuge poised state
Amendment expansion, so can only its adjustment amount it is smaller；Scheme four fundamental rules are not carried out water circulation system due to that can only carry out water filling
System, so unidirectional balance adjustment can only be realized, caved in for the model occurred in experiment, structure destroy etc. model caused by reason
Poised state caused by barycenter change changes, helpless.
The content of the invention
The purpose of the present invention is that to solve the above problems and provides a kind of geotechnical centrifuge gravity-center adjustable with refitting
Put.
The present invention is achieved through the following technical solutions above-mentioned purpose：
A kind of geotechnical centrifuge gravity-center adjustable counter weight device, including：
Support, the support are cylinder cage structure, and its one end is provided with the flange for being fixedly connected with centrifuge；
Screw mandrel, the screw mandrel are that the cylindrical structure of the support other end, the bearing machine are installed on by Bearning mechanism
Structure includes bearing block and bearing, and the bearing is installed between the screw mandrel and the bearing block, and the bearing block is fixedly mounted
There are some guide rods being parallel to each other, the guide rod is arranged along screw mandrel length direction, and the nut sleeve is on the guide rod and can be past
Multiple mobile, the screw mandrel and the support are coaxial, and its inner cylinder face is provided with motion thread；
Nut, the nut are the cylindrical structural being placed in inside the screw mandrel, and its external cylindrical surface is provided with motion thread
And home position is provided with counterweight mounting hole, the motion thread of the nut engages with the motion thread of the screw mandrel；
Mass, the mass are cylindrical structural, and it is installed in the counterweight mounting hole of the nut, the quality
It is detachable fixed connection structure between block and the nut；
Gear ring, the gear ring are enclosed on the screw mandrel, and are positioned relative to the screw mandrel ring；
Gear, the gear engage with the gear ring；
Motor, it is fixedly installed on the support, and the gear is arranged on the turning end of the motor.
As a kind of technical scheme of this patent selection, the Bearning mechanism includes bearing block and bearing, the bearing card
Loaded between the screw mandrel and the bearing block, the bearing block is installed with some guide rods being parallel to each other, the guide rod
Arrange that the nut sleeve is on the guide rod and is reciprocally moveable along screw mandrel length direction.
As a kind of technical scheme of this patent selection, the bearing block has two, and one of bearing block is fixed on institute
State on support, the both ends of the screw mandrel and two bearing blocks are provided with stair-stepping bearing mounting surface, the screw mandrel
Bearing is installed between both ends and two bearing blocks, the both ends of the guide rod are individually fixed in two bearing blocks
On.
As this patent selection a kind of technical scheme, the bearing block by be sequentially connected big ring part, middle cylinder
Portion and small ring part composition, the external diameter of the small ring part, the external diameter in the middle cylinder portion, the internal diameter of the big ring part are equal
Equal, the small ring part offers some guide rod installing holes for installation guide rod.
As a kind of technical scheme of this patent selection, the both ends of the screw mandrel are respectively arranged with bearing protecting cover and transmission is protected
Lid, the gear and the gear ring are encapsulated in the transmission protecting cover, the bearing envelope of the one end of the screw mandrel away from the support
In the bearing protecting cover.
As a kind of technical scheme of this patent selection, the outer ring surface of the support is welded with motor erecting bed, the electricity
Machine is bolted to connection on the motor erecting bed.
As a kind of technical scheme of this patent selection, some reinforcements are provided with the inside of the support.
As a kind of technical scheme of this patent selection, the interior cylinder with the mass of counterweight mounting hole of the nut
Face is machined with ladder mounting surface, and the ladder mounting surface of the mass is resisted against on the ladder mounting surface of the nut.
The beneficial effects of the present invention are：
Fixed by the flange on support between the present invention and centrifuge, designed for Demountable, by being remotely controlled electricity
Machine is driven, and the position of mass can be adjusted under centrifuge dynamic or static conditions to realize balance adjustment；It can realize double
To balance adjustment, i.e. mass can move back and forth along screw mandrel length direction, during overcoming experiment, due to model itself structure
Type changes the influence for equipment whole machine balancing；By changing mass, it is possible to achieve geotechnical centrifuge different scales and scope
Balance adjustment；The device can both use on suspended centrifugal, can also be used on platform-type centrifuge, and installation is extremely
It is convenient.
Brief description of the drawings
Fig. 1 is the static application schematic diagram of geotechnical centrifuge gravity-center adjustable counter weight device of the present invention；
Fig. 2 is the dynamic application schematic diagram of geotechnical centrifuge gravity-center adjustable counter weight device of the present invention；
Fig. 3 is the sectional structure chart of geotechnical centrifuge gravity-center adjustable counter weight device of the present invention；
Fig. 4 is the structure chart of screw mandrel of the present invention；
Fig. 5 is the structure chart of bearing block of the present invention；
Fig. 6 is the structure chart of support of the present invention；
In figure：1- gravity-center adjustable counter weight devices, 2- centrifuge pivoted arms, 3- test models, 11- bearing protecting covers, 12- bearings,
13- is driven protecting cover, 14- gears, 15- motors, 16- gear rings, 17- masses, 18- guide rods, 19- supports, 120- bearing blocks, 121-
Nut, 122- screw mandrels, 123- guide rod installing holes, 124- motor erecting beds.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings：
With reference to shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, the present invention includes following structure：
Support 19, support 19 are cylinder cage structure, and its one end is provided with the flange for being fixedly connected with centrifuge；
Screw mandrel 122, screw mandrel 122 are that the cylindrical structure of the other end of support 19, Bearning mechanism bag are installed on by Bearning mechanism
Bearing block 20 and bearing 12 are included, bearing 12 is installed between screw mandrel 122 and bearing block 20, and bearing block 20 is installed with some phases
Mutually parallel guide rod 18, guide rod 18 arrange that nut 121 is enclosed on guide rod 18 and is reciprocally moveable, silk along the length direction of screw mandrel 122
Bar 122 and support 19 are coaxial, and its inner cylinder face is provided with motion thread；
Nut 121, nut 121 are the cylindrical structural being placed in inside screw mandrel 122, and its external cylindrical surface is provided with motion thread
And home position is provided with counterweight mounting hole, the counterweight mounting hole of nut 121 is interior and the face of cylinder of mass 17 is machined with rank
Terraced mounting surface, the ladder mounting surface of mass 17 are resisted against on the ladder mounting surface of nut 121, the motion thread of nut 121 with
The motion thread engagement of screw mandrel 122；
Mass 17, mass 17 are cylindrical structural, and it is installed in the counterweight mounting hole of nut 121, mass 17
It is detachable fixed connection structure between nut 121；
Gear ring 16, gear ring 16 are enclosed on screw mandrel 122, and are positioned relative to the ring of screw mandrel 122；
Gear 14, gear 14 engage with gear ring 16；
Motor 15, it is fixedly installed on support 19, and gear 14 is arranged on the turning end of motor 15.
As a kind of technical scheme of this patent selection, bearing block 20 has two, and one of bearing block 20 is fixed on branch
On frame 19, the both ends of screw mandrel 122 and two bearing blocks 20 are provided with stair-stepping bearing mounting surface, the both ends of screw mandrel 122 and
Bearing is installed between two bearing blocks 20, the both ends of guide rod 18 are individually fixed on two bearing blocks 20.
As this patent selection a kind of technical scheme, bearing block 20 by be sequentially connected big ring part, middle cylinder portion
Formed with small ring part, the external diameter of small ring part, the external diameter in middle cylinder portion, the internal diameter of big ring part are equal, the structure group
Bearing mounting surface has been shaped as, has been easy to the installation of bearing, small ring part offers some guide rods for installation guide rod 18 and installed
Hole 123, to realize the fixation of guide rod 18.
As a kind of technical scheme of this patent selection, the both ends of screw mandrel 122 are respectively arranged with bearing protecting cover 11 and transmission
Protecting cover 13, gear 14 and gear ring 16 are encapsulated in transmission protecting cover 13, and the bearing package of the one end of screw mandrel 122 away from support 19 is in axle
Hold in protecting cover 11.
As a kind of technical scheme of this patent selection, the outer ring surface of support 19 is welded with motor erecting bed 124, motor 15
It is bolted to connection on motor erecting bed 124.
As a kind of technical scheme of this patent selection, the inner side of support 19 is provided with some reinforcements, to improve support
19 intensity, extend its service life.
The operation principle of the present invention is as follows：
On centrifuge install test model 3 after, by gravity-center adjustable counter weight device 1 be arranged on it is relative with test model 3 from
The termination of scheming pivoted arm 2, the installation for isometric pivoted arm structure is as shown in figure 1, its running status is as shown in Figure 2.
Gravity-center adjustable counter weight device 1 is structure of independently establishing one's own system, and it forms as shown in Figure 3.
Before gravity-center adjustable counter weight device 1 is installed on centrifuge, first pass through motor 15 and drive mass 17 to return to and initially set
Locate calmly (typically in stroke middle part), be then installed on centrifuge.
According to the measurement result of centrifuge imbalance force cell, start motor 15, allow after the drive gear 14 of motor 15
Gear ring 16 is driven to rotate so that screw mandrel 122 rotates；The matter being arranged on its matching nut 121 is driven in the rotation process of screw mandrel 122
Gauge block 17 is axially moved, so as to realize the preliminary leveling of centrifuge.Progressively run after centrifuge startup to work g value sections
Before, whether system is according to out-of-balance force measurement sensor survey calculation result to needing moving mass block 17 to send instruction, you can
Realize automatic trim；Now, also can artificial intervention, by artificially study and judge out-of-balance force resulting force curve change, judge out-of-balance force
Whether value is closed near dangerous values, so as to be responded using motor 15 is early, avoids occurring injustice in the continuous boosting velocity procedure of equipment
Weighing apparatus power fluctuates widely.
These are only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
All any modification, equivalent and improvement made within principle etc., should be included within the scope of the present invention.
Claims (7)
- A kind of 1. geotechnical centrifuge gravity-center adjustable counter weight device, it is characterised in that including：Support, the support are cylinder cage structure, and its one end is provided with the flange for being fixedly connected with centrifuge；Screw mandrel, the screw mandrel are that the cylindrical structure of the support other end, the Bearning mechanism bag are installed on by Bearning mechanism Bearing block and bearing are included, the bearing is installed between the screw mandrel and the bearing block, if the bearing block is installed with The dry guide rod being parallel to each other, the guide rod arrange that the nut sleeve is on the guide rod and reciprocally moves along screw mandrel length direction Dynamic, the screw mandrel and the support are coaxial, and its inner cylinder face is provided with motion thread；Nut, the nut are the cylindrical structural being placed in inside the screw mandrel, and its external cylindrical surface is provided with motion thread and circle Heart position is provided with counterweight mounting hole, and the motion thread of the nut engages with the motion thread of the screw mandrel；Mass, the mass are cylindrical structural, and it is installed in the counterweight mounting hole of the nut, the mass with It is detachable fixed connection structure between the nut；Gear ring, the gear ring are enclosed on the screw mandrel, and are positioned relative to the screw mandrel ring；Gear, the gear engage with the gear ring；Motor, it is fixedly installed on the support, and the gear is arranged on the turning end of the motor.
- 2. geotechnical centrifuge gravity-center adjustable counter weight device according to claim 1, it is characterised in that the bearing block has two Individual, one of bearing block is fixed on the bracket, and the both ends of the screw mandrel and two bearing blocks are provided with ladder The bearing mounting surface of shape, bearing, the both ends of the guide rod are installed between the both ends of the screw mandrel and two bearing blocks It is individually fixed on two bearing blocks.
- 3. geotechnical centrifuge gravity-center adjustable counter weight device according to claim 2, it is characterised in that the bearing block by according to The big ring part of secondary connection, middle cylinder portion and small ring part composition, the external diameter of the small ring part, the middle cylinder portion External diameter, the internal diameter of the big ring part are equal, and the small ring part offers some guide rod installing holes for installation guide rod.
- 4. geotechnical centrifuge gravity-center adjustable counter weight device according to claim 2, it is characterised in that the both ends of the screw mandrel Bearing protecting cover and transmission protecting cover are respectively arranged with, the gear and the gear ring are encapsulated in the transmission protecting cover, the screw mandrel The bearing package of one end away from the support is in the bearing protecting cover.
- 5. geotechnical centrifuge gravity-center adjustable counter weight device according to claim 1, it is characterised in that the outer shroud of the support Face is welded with motor erecting bed, and the motor is bolted to connection on the motor erecting bed.
- 6. geotechnical centrifuge gravity-center adjustable counter weight device according to claim 1, it is characterised in that the inner side of the support It is provided with some reinforcements.
- 7. geotechnical centrifuge gravity-center adjustable counter weight device according to claim 1, it is characterised in that the counterweight of the nut The face of cylinder in mounting hole with the mass is machined with ladder mounting surface, and the ladder mounting surface of the mass is resisted against institute State on the ladder mounting surface of nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711124604.7A CN107694771A (en) | 2017-11-14 | 2017-11-14 | A kind of geotechnical centrifuge gravity-center adjustable counter weight device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711124604.7A CN107694771A (en) | 2017-11-14 | 2017-11-14 | A kind of geotechnical centrifuge gravity-center adjustable counter weight device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107694771A true CN107694771A (en) | 2018-02-16 |
Family
ID=61178542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711124604.7A Pending CN107694771A (en) | 2017-11-14 | 2017-11-14 | A kind of geotechnical centrifuge gravity-center adjustable counter weight device |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2754056A1 (en) * | 1996-09-27 | 1998-04-03 | Perdriat Jacques | Automatic balancing system for a large size centrifuge. |
| US20020189360A1 (en) * | 2000-11-22 | 2002-12-19 | Shuichi Kawasaki | Vibration absorbing system of micro gravity rotating apparatus |
| US20050026765A1 (en) * | 2003-07-29 | 2005-02-03 | Diagyr | Process to balance a rotatable plate of a centrifuge and centrifuge using the process |
| US20100009831A1 (en) * | 2008-07-10 | 2010-01-14 | Hanlab Corporation | Automatic balance adjusting centrifuge |
| CN201776187U (en) * | 2010-08-02 | 2011-03-30 | 浙江大学 | Biaxial self-adapting dynamic balance actuating device for centrifugal machine |
| CN102652929A (en) * | 2012-04-17 | 2012-09-05 | 中国工程物理研究院总体工程研究所 | Online dynamic balance regulating mechanism of geotechnical centrifuge |
| CN103331213A (en) * | 2013-07-09 | 2013-10-02 | 中国工程物理研究院总体工程研究所 | Wide-range static balance adjusting system of large centrifugal machine |
| CN204911830U (en) * | 2015-09-15 | 2015-12-30 | 中国工程物理研究院总体工程研究所 | Novel static trim of centrifugal separator device |
| CN105750095A (en) * | 2016-04-06 | 2016-07-13 | 温州医科大学附属第二医院育英儿童医院 | Self-balancing centrifugal machine |
| US20160296947A1 (en) * | 2015-04-05 | 2016-10-13 | Microaire Surgical Instruments, Llc | Centrifuge Counterbalance with Adjustable Center of Gravity and Methods for Using the Same |
| CN106645640A (en) * | 2016-12-07 | 2017-05-10 | 同济大学 | Testing device and method of foundation pit excavation rock soil centrifuge |
| CN207722967U (en) * | 2017-11-14 | 2018-08-14 | 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 |
-
2017
- 2017-11-14 CN CN201711124604.7A patent/CN107694771A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2754056A1 (en) * | 1996-09-27 | 1998-04-03 | Perdriat Jacques | Automatic balancing system for a large size centrifuge. |
| US20020189360A1 (en) * | 2000-11-22 | 2002-12-19 | Shuichi Kawasaki | Vibration absorbing system of micro gravity rotating apparatus |
| US20050026765A1 (en) * | 2003-07-29 | 2005-02-03 | Diagyr | Process to balance a rotatable plate of a centrifuge and centrifuge using the process |
| US20100009831A1 (en) * | 2008-07-10 | 2010-01-14 | Hanlab Corporation | Automatic balance adjusting centrifuge |
| CN201776187U (en) * | 2010-08-02 | 2011-03-30 | 浙江大学 | Biaxial self-adapting dynamic balance actuating device for centrifugal machine |
| CN102652929A (en) * | 2012-04-17 | 2012-09-05 | 中国工程物理研究院总体工程研究所 | Online dynamic balance regulating mechanism of geotechnical centrifuge |
| CN103331213A (en) * | 2013-07-09 | 2013-10-02 | 中国工程物理研究院总体工程研究所 | Wide-range static balance adjusting system of large centrifugal machine |
| US20160296947A1 (en) * | 2015-04-05 | 2016-10-13 | Microaire Surgical Instruments, Llc | Centrifuge Counterbalance with Adjustable Center of Gravity and Methods for Using the Same |
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| CN106645640A (en) * | 2016-12-07 | 2017-05-10 | 同济大学 | Testing device and method of foundation pit excavation rock soil centrifuge |
| CN207722967U (en) * | 2017-11-14 | 2018-08-14 | 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 |
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| Title |
|---|
| 赵玉虎等: "力传感器在离心机平衡检测与保护系统中的应用", 《四川省电子学会传感器专委会第九届学术年会会议论文》, pages 101 - 105 * |
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