CN109833982B - Geotechnical drum type centrifuge device - Google Patents
Geotechnical drum type centrifuge device Download PDFInfo
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- CN109833982B CN109833982B CN201910276811.7A CN201910276811A CN109833982B CN 109833982 B CN109833982 B CN 109833982B CN 201910276811 A CN201910276811 A CN 201910276811A CN 109833982 B CN109833982 B CN 109833982B
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- 230000001360 synchronised effect Effects 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000006880 cross-coupling reaction Methods 0.000 claims abstract description 7
- 230000005484 gravity Effects 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 description 5
- 230000001133 acceleration Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- -1 electricity Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention discloses a geotechnical drum type centrifuge device, which comprises an outer shaft and an inner shaft; the outer shaft is a hollow shaft and is used for driving the model groove to rotate; the inner shaft is arranged in the outer shaft and driven by the inner shaft motor, and the inner shaft is used for driving the actuator platform to rotate; the outer shaft is not contacted with the inner shaft, and the outer shaft and the inner shaft are coaxially arranged; the outer shaft motor is a direct drive motor, and the outer shaft passes through the outer shaft motor and is driven by the outer shaft motor; the outer shaft and the inner shaft realize synchronous or asynchronous movement by a cross coupling control method. The invention adopts the direct drive motor to directly drive the outer shaft, and has the characteristics of quick starting, high rotating speed control precision, stable operation and the like; the outer shaft and the inner shaft realize synchronous or asynchronous movement by a cross coupling control method, and can avoid vibration influence caused by synchronous realization of mechanical connection (clutch).
Description
Technical Field
The invention belongs to the technical field of centrifuges, and particularly relates to a geotechnical drum type centrifuge device.
Background
The drum type centrifugal machine drives the annular model groove to rotate at a high speed through the high-power motor, provides centrifugal acceleration which is N times of gravity acceleration g, can be used for model tests which need a large test plane space such as a simulation pipeline, a wave model and the like, and has the outstanding advantages that the model groove can provide a large test space which is not influenced by boundary effects for continuous and homogeneous samples; compared with an arm type centrifuge, the drum type centrifuge has smaller rotation radius, higher rotation speed, higher centrifugal acceleration, larger prototype size simulation in the circumferential direction, and therefore, the arm type centrifuge has irreplaceable technical advantages, and the drum type centrifuge is widely applied in the fields of geotechnical engineering, coastal engineering, environmental geotechnical engineering and the like. The drum type centrifugal machine is provided with an inner independent concentric rotating shaft and an outer independent concentric rotating shaft, wherein the outer shaft is a hollow shaft and drives the model groove to rotate, and the inner shaft is arranged inside the outer shaft and drives the actuator platform (the mounting manipulator) to rotate.
At present, only two units in China are provided with the drum type centrifuges, and the drum type centrifuges are prepared and produced abroad, and university of company in 2009 is introduced from broadmount company in the united kingdom into the first drum type centrifuges in China. Through data review, the drum centrifuges developed abroad at present have the following characteristics: 1. the drum centrifuges are vertically installed and are provided with an inner concentric rotating shaft and an outer concentric rotating shaft; 2. the main driving system adopts a belt pulley transmission system; 3. the bearing system adopts a combination mode of different types of rolling bearings (such as a combination of a cylindrical roller bearing and an angular contact ball bearing); 4. the inner shaft and the outer shaft are synchronously controlled to realize the combination and separation of the inner rotating shaft and the outer rotating shaft in a mechanical mode.
The drum type centrifugal machine is different from the arm type centrifugal machine, and is provided with an inner shaft and an outer shaft which are independent and concentric, the outer shaft drives the model groove to rotate, the inner shaft drives the actuator platform to rotate, and the inner shaft and the outer shaft can synchronously or asynchronously rotate.
The drum type centrifugal machine belongs to rotary machinery, and according to the structural characteristics and the use conditions, the rotating parts adopt a grease lubrication mode, so that the design of a bearing system is critical. The traditional drum centrifuge bearing system adopts a combination mode of different types of rolling bearings, so that the drum centrifuge with small structural size and light load is enough to meet the use requirement, and the centrifuge with large structural size and heavy load is easy to heat when part of bearings are operated at high rotating speed for a long time.
Most of traditional drum centrifuges are provided with clutches at the bottoms to realize the combination and separation of the inner rotating shafts and the outer rotating shafts, so that the inner shaft and the outer shaft are controlled to synchronously rotate or asynchronously rotate, and the actuator platform driven by the inner shaft can be stopped or synchronously rotated again at any time according to test requirements. The connection or separation is realized by the mechanical connection mode when the centrifugal machine runs at a high rotating speed, and large vibration is easy to generate.
The conventional drum type centrifuge main driving system (driving model groove) basically adopts a belt pulley driving system, the driving characteristic of the belt pulley driving system is relatively low in driving efficiency, and the belt can be loosened or aged under long-term operation, so that the stability and control accuracy of the rotational speed of the centrifuge are affected.
In order to solve the problems, a geotechnical drum type centrifuge device is developed.
Disclosure of Invention
The invention aims to solve the problems and provide the geotechnical drum type centrifuge device.
The invention realizes the above purpose through the following technical scheme:
a geotechnical drum type centrifuge device, comprising
An outer shaft; the outer shaft is a hollow shaft and is used for driving the model groove to rotate;
an inner shaft; the inner shaft is arranged in the outer shaft and driven by the inner shaft motor, and the inner shaft is used for driving the actuator platform to rotate; the outer shaft is not contacted with the inner shaft, and the outer shaft and the inner shaft are coaxially arranged;
the outer shaft motor is a direct drive motor, and the outer shaft passes through the outer shaft motor and is driven by the outer shaft motor; the outer shaft and the inner shaft realize synchronous or asynchronous movement by a cross coupling control method.
The invention has the beneficial effects that:
the invention relates to a geotechnical drum type centrifuge device, which comprises:
the direct-drive motor is adopted to directly drive the outer shaft, so that the device has the characteristics of quick starting, high rotating speed control precision, stable operation and the like;
the outer shaft and the inner shaft realize synchronous or asynchronous movement by a cross coupling control method, and can avoid vibration influence caused by synchronous realization of mechanical connection (clutch).
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a shafting support structure according to the present invention.
In the figure: 1. an inner shaft motor; 2. a base; 3. self-aligning ball bearings; 4. an outer shaft motor; 5. a first cylindrical roller bearing; 6. vertical thrust sliding bearings; 7. a second cylindrical roller bearing; 8. an outer shaft; 9. tapered roller bearings; 10. an inner shaft; 11. a model groove; 12. an actuator platform; 13. a protective cover; 14. a collector ring; 15. and an instrument cabin.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
example 1, as shown in fig. 1 and 2:
a geotechnical drum type centrifuge device, comprising
An outer shaft 8; the outer shaft 8 is a hollow shaft, and the outer shaft 8 is used for driving the model groove 11 to rotate;
an inner shaft 10; the inner shaft 10 is arranged inside the outer shaft 8, the inner shaft 10 is driven by the inner shaft motor 1, and the inner shaft 10 is used for driving the actuator platform 12 to rotate; the outer shaft 8 is not contacted with the inner shaft 10, and the outer shaft 8 and the inner shaft 10 are coaxially arranged;
the outer shaft motor 4 is a direct drive motor, and the outer shaft 8 passes through the outer shaft motor 4 and is driven by the outer shaft motor 4; the outer shaft 8 and the inner shaft 10 achieve their synchronous or asynchronous movement by means of a cross-coupling control method.
The outer shaft motor 4 in the application adopts a high-power direct-drive motor; the inner shaft 10 and the outer shaft 8 realize synchronous or asynchronous movement by independently controlling the motors and adopting a cross-coupling synchronous control method so as to meet test working conditions of different types;
the drum centrifuge adopts a direct-drive motor to directly drive the outer shaft 8, has good structural rigidity, can improve the dynamic response speed and response precision of the system, and is beneficial to synchronous control of the inner shaft 10 and the outer shaft 8;
the lower end of the outer shaft 8 is directly connected with the outer shaft motor 4 through an expansion sleeve, the outer shaft motor 4 is connected to an outer motor mounting frame through bolts, and the outer motor mounting frame is mounted on the base 2; the inner shaft 10 is directly connected with the inner shaft motor 1 through a coupler, the inner shaft motor 1 is directly connected to an inner motor mounting frame through bolts, and the inner shaft motor 1 mounting frame is connected with the base 2 through bolts and springs, so that a certain buffering effect is achieved.
The drum type centrifuge bearing system comprises an inner shaft 10, an outer shaft 8, bearings and the like, wherein the outer shaft 8 is supported by a cylindrical roller bearing 5, a cylindrical roller bearing 7 and a vertical thrust sliding bearing 6, the vertical thrust sliding bearing 6 bears all axial force and part of radial force, and the cylindrical roller bearing 5 and the cylindrical roller bearing 7 only bear radial force. The inner shaft 10 is supported by the self-aligning ball bearing 3 and the tapered roller bearing 9, the self-aligning ball bearing 3 receiving a radial force, the tapered roller bearing 9 receiving an axial force and a partial radial force. The weight of all the rotating bodies such as the model groove 11, the actuator platform 12, the inner and outer shafts 8, etc. is supported on the base 2 via the vertical thrust sliding bearing 6.
Example 2, as shown in fig. 1 and 2:
this embodiment differs from embodiment 1 in that:
the centrifuge device further comprises cylindrical roller bearings for radially supporting the outer shaft 8, vertical thrust sliding bearings 6 for radially supporting the outer shaft 8 and axially supporting the rotating body.
The rotary body in the embodiment comprises a model groove 11, an actuator platform 12, an inner shaft, an outer shaft and the like;
example 3, as shown in fig. 1 and 2:
this embodiment differs from embodiment 2 in that:
the outer wall of the outer shaft 8 is fixedly connected with a thrust head of the vertical thrust sliding bearing 6, a bearing seat of the vertical thrust sliding bearing 6 is fixed on the base 2, and the bottom of the model groove 11 is fixedly connected with the thrust head of the vertical thrust sliding bearing 6.
In this embodiment, preferably, the outer shaft is fixedly connected with the model groove through the instrument cabin 15, and an instrument cabin 15 and a connecting piece are further arranged between the bottom of the model groove 11 and the thrust head of the vertical thrust sliding bearing 6, so that the model groove 11 and the vertical thrust sliding bearing 6 can be better matched with each other, and the cable arrangement of equipment is better.
Example 4, as shown in fig. 1 and 2:
this embodiment differs from embodiment 2 or embodiment 3 in that:
the cylindrical roller bearing comprises a first cylindrical roller bearing 5 and a second cylindrical roller bearing 7, the first cylindrical roller bearing 5 is sleeved on the outer shaft 8 and is positioned at the upper part of the outer shaft motor 4, and the outer ring of the first cylindrical roller bearing 5 is connected with a bearing seat of the vertical thrust sliding bearing 6; the second cylindrical roller bearing 7 is sleeved at the upper end of the outer shaft 8, and the outer ring of the second cylindrical roller bearing 7 is fixedly connected with the thrust head of the vertical thrust sliding bearing 6.
The first cylindrical roller bearing 5 is connected with the vertical thrust sliding bearing 6 through a connecting piece, and the second cylindrical roller bearing 7 is connected with the vertical thrust sliding bearing 6 through a connecting piece;
example 5, as shown in fig. 1 and 2:
this embodiment differs from embodiment 2 in that:
a self-aligning ball bearing 3 and a tapered roller bearing 9 for supporting the inner shaft 10; the self-aligning ball bearing 3 is installed at the lower end of the inner shaft 10 and is used for bearing the radial force of the inner shaft 10; the tapered roller bearing 9 is mounted on the upper end of the inner shaft 10 and is used for bearing the axial force and the radial force of the inner shaft 10, and the gravity of the inner shaft 10 and the gravity of the actuator platform 12 are transmitted to the thrust head of the vertical thrust sliding bearing 6 through the tapered roller bearing 9.
A self-aligning ball bearing 3 and a tapered roller bearing 9 support the inner shaft 10, ensuring self-aligning, self-adapting capability of the actuator platform 12 during high speed operation.
Example 6, as shown in fig. 1:
this embodiment differs from embodiment 1 in that:
a protective cover 13 is provided outside the model tank 11 to reduce air resistance and to protect safety during operation of the centrifuge.
The upper part of the model groove 11 is also provided with a collecting ring 14 for transmitting water, electricity, gas and various signals.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (3)
1. A geotechnical drum type centrifuge device, comprising
An outer shaft; the outer shaft is a hollow shaft and is used for driving the model groove to rotate;
an inner shaft; the inner shaft is arranged in the outer shaft and driven by the inner shaft motor, and the inner shaft is used for driving the actuator platform to rotate; the outer shaft is not contacted with the inner shaft, and the outer shaft and the inner shaft are coaxially arranged;
the method is characterized in that: the outer shaft motor is a direct drive motor, and the outer shaft passes through the outer shaft motor and is driven by the outer shaft motor; the outer shaft and the inner shaft realize synchronous or asynchronous movement by a cross coupling control method;
the centrifuge device further comprises:
the vertical thrust sliding bearing is used for radially supporting the outer shaft and axially supporting the rotating body;
self-aligning ball bearings and tapered roller bearings for supporting the inner shaft; the self-aligning ball bearing is arranged at the lower end of the inner shaft and is used for bearing the radial force of the inner shaft; the tapered roller bearing is arranged at the upper end of the inner shaft and is used for bearing the axial force and the radial force of the inner shaft, and the gravity of the inner shaft and the gravity of the actuator platform are transmitted to the thrust head of the vertical thrust sliding bearing through the tapered roller bearing;
a protective cover for reducing air resistance and protecting safety during the operation of the centrifugal machine is arranged outside the model groove.
2. The geotechnical drum centrifuge device according to claim 1, wherein: the outer wall of the outer shaft is fixedly connected with a thrust head of a vertical thrust sliding bearing, a bearing seat of the vertical thrust sliding bearing is fixed on the base, and the bottom of the model groove is fixedly connected with the thrust head of the vertical thrust sliding bearing.
3. A geotechnical drum centrifuge device according to claim 1 or 2, wherein: the cylindrical roller bearing comprises a first cylindrical roller bearing and a second cylindrical roller bearing, the first cylindrical roller bearing is sleeved on the outer shaft and is positioned at the upper part of the outer shaft motor, and the outer ring of the first cylindrical roller bearing is connected with the bearing seat of the vertical thrust sliding bearing; the second cylindrical roller bearing is sleeved at the upper end of the outer shaft, and the outer ring of the second cylindrical roller bearing is fixedly connected with the thrust head of the vertical thrust sliding bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910276811.7A CN109833982B (en) | 2019-04-08 | 2019-04-08 | Geotechnical drum type centrifuge device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910276811.7A CN109833982B (en) | 2019-04-08 | 2019-04-08 | Geotechnical drum type centrifuge device |
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| CN109833982A CN109833982A (en) | 2019-06-04 |
| CN109833982B true CN109833982B (en) | 2024-01-30 |
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| CN201910276811.7A Active CN109833982B (en) | 2019-04-08 | 2019-04-08 | Geotechnical drum type centrifuge device |
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| CN114224079B (en) * | 2021-12-03 | 2023-06-27 | 九江精密测试技术研究所 | Compact vertical shaft sleeve shaft structure |
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