CN113090710A - Annular shear thickening fluid type damper and rotor-supporting system - Google Patents
Annular shear thickening fluid type damper and rotor-supporting system Download PDFInfo
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- CN113090710A CN113090710A CN202110307225.1A CN202110307225A CN113090710A CN 113090710 A CN113090710 A CN 113090710A CN 202110307225 A CN202110307225 A CN 202110307225A CN 113090710 A CN113090710 A CN 113090710A
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- shear thickening
- thickening fluid
- damper
- elastic support
- cavity
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- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/16—Suppression of vibrations in rotating systems by making use of members moving with the system using a fluid or pasty material
- F16F15/165—Sealing arrangements
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- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/16—Suppression of vibrations in rotating systems by making use of members moving with the system using a fluid or pasty material
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
- Support Of The Bearing (AREA)
Abstract
The invention discloses an annular shear thickening fluid type damper and a rotor-support system. The adopted annular shear thickening fluid type damper comprises a damper shell, a squirrel cage elastic support arranged in the damper shell, a bearing arranged in the squirrel cage elastic support and a rotor rotating shaft penetrating through the bearing; a sealed shear thickening fluid cavity is formed between the damper shell and the squirrel cage elastic support and is filled with shear thickening fluid, so that excellent vibration damping and vibration isolation performance of the shear thickening fluid can be fully exerted, and meanwhile, the 360-degree circumferential damping can be provided for a rotor-system of an aeroengine.
Description
Technical Field
The present invention relates to the field of vibration suppression for rotor-bearing systems, and more particularly to dampers employed in rotor-bearing systems.
Background
The safety and reliability of the aircraft engine as the heart of the aircraft have been widely concerned, and the non-aircraft light gas turbine modified by the aircraft engine has been widely applied to power generation, cogeneration, mechanical transmission, oil and gas pipeline pump stations, power of ships, tanks and vehicles. In the case of aircraft engines, the rotor-bearing system serves as the core component of the aircraft engine, the vibration states of which play a decisive role in the overall performance of the aircraft engine and in the safety of the engine.
At present, the aeroengine supporting structure adopts a combination scheme of a rolling bearing, an elastic support and an extruded oil film damper. The squeeze film damper is used as a damping vibration attenuation element in the scheme, and oil is continuously supplied to an oil lubrication system of the engine to maintain a squeeze film for vibration attenuation, so that the scheme increases the complexity of an oil supply path of the oil lubrication system of the engine to a certain extent, and simultaneously leads the engine to carry more oil.
With the continuous improvement of requirements on the performance and reliability of an aero-engine, the modern aero-engine has higher and higher rotating speed and more compact structure, the harm of sudden loads such as blade loss, bird collision and the like possibly faced by the engine under the service condition to the engine is more and more emphasized, and the requirements on the vibration reduction and vibration isolation performance of a damper in a rotor-support system in the design of the engine are higher and higher; therefore, a novel damper is urgently needed to replace the conventional squeeze film damper so as to meet the requirements of vibration reduction and vibration isolation of the rotor-supporting system of the aircraft engine under high rotating speed and severe working conditions.
Disclosure of Invention
In order to solve the problems, the invention provides an annular shear thickening fluid type damper which can provide damping in the circumferential direction of 360 degrees for a rotor-system of an aeroengine while fully exerting excellent vibration damping and vibration isolation performance of the shear thickening fluid. Meanwhile, the damper is simple in structure.
The present invention also provides a rotor-bearing system having the annular shear thickening fluid-type damper described above.
In order to achieve the above object, the annular shear thickening fluid type damper of the present invention may adopt the following technical scheme:
an annular shear thickening fluid type damper comprises a damper shell, a squirrel cage elastic support arranged in the damper shell, a bearing arranged in the squirrel cage elastic support and a rotor rotating shaft penetrating through the bearing; a sealed shear thickening fluid cavity is formed between the damper shell and the squirrel cage elastic support, and shear thickening fluid is filled in the shear thickening fluid cavity; the shear thickening fluid in the shear thickening fluid cavity is extruded when the squirrel cage elastic support vibrates.
Furthermore, a shear thickening liquid injection hole penetrating through the shear thickening liquid cavity is formed in the damper shell; a cavity sealing bolt is arranged in the shear thickening liquid injection hole.
Furthermore, the bearing is connected and fixed with the squirrel cage elastic support through a locking nut or an elastic retainer ring.
Further, the shear thickening fluid is a shear thickening fluid having silica particles and a dispersion medium polyethylene glycol.
The annular shear thickening fluid type damper can also adopt the following technical scheme:
an annular shear thickening fluid type damper comprises a damper shell, a squirrel cage elastic support arranged in the damper shell, a bearing arranged in the squirrel cage elastic support and a rotor rotating shaft penetrating through the bearing; the vibration damper is characterized in that an annular cavity is formed between the damper shell and the squirrel cage elastic support, two ends of the cavity are respectively provided with a sealing gasket to seal the cavity, the cavity is filled with shear thickening liquid, and the sealing gasket is an elastic sealing gasket and forms a buffering part for vibration of the squirrel cage elastic support together with the shear thickening liquid.
Furthermore, the outer circle of the sealing gasket and the inner circle of the damper shell are centered.
Furthermore, the sealing gaskets are made of polyethylene closed-cell foam plates.
Furthermore, a shear thickening liquid injection hole penetrating through the shear thickening liquid cavity is formed in the damper shell; a cavity sealing bolt is arranged in the shear thickening liquid injection hole.
Furthermore, a gap is reserved between the inner circle of the sealing gasket and the squirrel cage elastic support, the outer side of one sealing gasket is blocked by a step reserved on the squirrel cage elastic support, and the outer side of the other sealing gasket is blocked by a locking nut.
Has the advantages that: compared with a common squeeze film damper, the two shear thickening fluid dampers provided by the invention adopt shear thickening fluids to absorb vibration in the technical scheme. The shear thickening fluid circumferentially surrounds the squirrel cage elastic support, so that the 360-degree circumferential damping can be provided for the squirrel cage elastic support, and the irregular vibration and large-amplitude vibration of the rotating speed of the rotor-support system in a region near the critical rotating speed can be effectively inhibited. The shear thickening fluid damper can effectively reduce the load peak value transmitted from the rotor system of the engine to the stator system when sudden loading such as blade loss, bird collision and the like occurs, and reduce the influence and damage of the sudden loading on the engine system; the shear thickening fluid damper does not need oil supply from a lubricating oil system, thereby being beneficial to reducing the weight of the engine and simplifying an oil supply pipeline; meanwhile, the damper is simple and reliable in structure, small in occupied space and beneficial to improving the reliability of the engine.
The rotor-support system with the annular shear thickening fluid type damper adopts the following technical scheme: the device comprises two supporting systems, a rotor rotating shaft and a driving motor for driving the rotor rotating shaft to rotate; the two supporting systems respectively comprise a shell of an annular shear thickening fluid type damper, a squirrel cage elastic support and a bearing, and a rotor rotating shaft sequentially penetrates through the bearings in the two supporting systems
Has the advantages that: the two supporting systems in the rotor-supporting system provided by the invention both adopt the annular shear thickening fluid type damper structure, provide 360-degree circumferential damping for vibration transmission at two ends of the rotor rotating shaft, and can effectively inhibit the whole vibration.
Drawings
FIG. 1 is a schematic view of a shear thickening fluid damper construction.
FIG. 2 is an enlarged view of a portion of the shear thickening fluid chamber.
FIG. 3 is a circumferential schematic view of a shear thickening fluid damper.
FIG. 4 is a schematic view of a rotor-bearing system configuration employing a shear thickening fluid damper.
Detailed Description
Please refer to fig. 1 to 3, which illustrate a shear thickening fluid damper in this embodiment, including a rotor shaft 1, a squirrel cage elastic support 2, a mounting bracket 3, a damper housing 4, a lock nut 5, a left sealing gasket 6, a shear thickening fluid cavity 7, a cavity sealing bolt 8, a right sealing gasket 9, a lock nut 10, a lock nut 11, a lock nut 12, a bearing 13, and a lock nut 14. The rotor shaft 1 can be a shaft in a rotor system of an aircraft engine, and can also be a shaft in a rotor system of other gas turbines. The squirrel cage elastic support 2 is mounted in a damper housing 4. The bearing 13 is installed in the squirrel cage elastic support 2. The rotor shaft 1 passes through the bearing 13. A sealed shear thickening fluid cavity 7 is formed between the damper shell and the squirrel cage elastic support, and shear thickening fluid is filled in the shear thickening fluid cavity 7.
The shear thickening fluid cavity 7 is positioned at the outer ring position of the squirrel cage elastic support 2 provided with the bearing 13, and the shear thickening fluid cavity 7 is formed by surrounding the squirrel cage elastic support 2, the damper shell 4, the left sealing gasket 6 and the right sealing gasket 9; the two ends of the damper cavity 7 are sealed by a left sealing gasket 6, a right sealing gasket 9, a locking nut 5, a locking nut 10 and a locking nut 11. The shear thickening fluid in the shear thickening fluid cavity 7 is reserved and injected into a threaded hole in the damper shell 4, and the injection is sealed by a cavity sealing bolt 8. One end of the damper shell 4 is a shear thickening liquid cavity 7, and the other end is fixed on the mounting bracket 3.
Fig. 2 is a partially enlarged view of the shear thickening fluid chamber. The damper shell 4 is arranged on the outer side of the shear thickening liquid cavity 7, a shear thickening liquid injection hole is reserved on the damper shell, and the injection hole is blocked by a cavity sealing bolt 8 after the injection is finished; the inner side of the damper cavity is provided with a squirrel cage elastic support 2, and the radial thickness of the damper cavity can be flexibly adjusted according to the actual size of the supporting system and the damping requirement. The left side and the right side of the shear thickening fluid cavity 7 are sealed by a left sealing gasket 6 and a right sealing gasket 7, and the outer circle of the sealing gasket and the inner circle of the damper shell 4 are centered, so that the sealing gasket is prevented from radially shaking; the left side and the right side of the outer ring of the sealing gasket are respectively a preset step on the damper shell 4, a locking nut 5 and a locking nut 10, and the structure ensures that the sealing gasket cannot shake left and right. A gap is reserved between the inner circle of the sealing gasket and the squirrel cage elastic support 2, the outer side of the left sealing gasket 6 is blocked by a step reserved on the squirrel cage elastic support 2, and the outer side of the right sealing gasket 9 is blocked by a locking nut 11, so that the sealing performance of the inner circle of the shear thickening fluid cavity 7 is ensured, and meanwhile, the sealing gasket deformation caused by radial vibration of the squirrel cage elastic support 2 is avoided, so that the shear thickening fluid is prevented from leaking; it should be further noted that the illustrated locknut may be replaced with a circlip or other locking means as required by the structural design.
Please refer to fig. 3, which is a schematic circumferential view of the shear thickening fluid, and the damper housing 4, the cavity sealing bolt 8, the shear thickening fluid cavity 7, the squirrel cage elastic support 2, the bearing outer roll 21, the bearing balls 22, and the bearing inner raceway 23 are sequentially arranged from the outer ring to the inner ring. When the aero-engine works, the rotor system vibrates in any direction in an xy plane shown in the drawing, the vibration of the rotor system is firstly transmitted to the bearing inner rolling way 23 and is transmitted to the squirrel-cage elastic support 2 through the bearing ball 22 and the bearing outer rolling way 21, so that the vibration of the squirrel-cage elastic support 2 in the xy plane is caused, the vibration can extrude shear thickening fluid in the shear thickening fluid cavity 7, the shear thickening fluid absorbs energy, vibration reduction and vibration isolation of the rotor-support system are realized, the amplitude of the rotor system is reduced, and meanwhile, the load peak value transmitted to the stator system by the support of the rotor system is reduced.
FIG. 4 is a schematic view of an embodiment of a rotor-support system employing a shear-thickening fluid-type damper; the rotor-supporting system tester consists of a rotor rotating shaft 1, a driving motor 15, a driving motor support 16, a coupling 17, a supporting system 18, a supporting system 19 and a test bench 20; the supporting system 18 and the supporting system 19 are supporting systems adopting shear thickening fluid type dampers; the driving motor 15 is fixed on the test bed 20 through a driving motor support 16, the driving motor 15 is connected with the driving motor support 16 through 6 bolts, the driving motor support 16 is connected with the test bed 20 through 4 foundation bolts, and the driving motor 15 and the rotor rotating shaft 1 transmit torque through a coupling 17; the rotor rotating shaft 1 is arranged on a test bed 20 through a supporting system 18 and a supporting system 19, and the supporting system 18 and the supporting system 19 are respectively fixed on the test bed 20 by adopting 4 bolts
In addition, the present invention has many specific implementations and ways, and the above description is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (10)
1. An annular shear thickening fluid type damper comprises a damper shell, a squirrel cage elastic support arranged in the damper shell, a bearing arranged in the squirrel cage elastic support and a rotor rotating shaft penetrating through the bearing; the squirrel-cage damper is characterized in that a sealed shear thickening fluid cavity is formed between the damper shell and the squirrel-cage elastic support, and shear thickening fluid is filled in the shear thickening fluid cavity; the shear thickening fluid in the shear thickening fluid cavity is extruded when the squirrel cage elastic support vibrates.
2. The annular shear thickening fluid type damper according to claim 1, wherein: the damper shell is provided with a shear thickening liquid injection hole which penetrates through the shear thickening liquid cavity; a cavity sealing bolt is arranged in the shear thickening liquid injection hole.
3. The annular shear thickening fluid type damper according to claim 2, wherein: the bearing is connected and fixed with the squirrel cage elastic support through a locking nut or an elastic retainer ring.
4. The annular shear thickening fluid type damper according to claim 1, wherein: the shear thickening fluid is a shear thickening fluid with silica particles and a dispersion medium polyethylene glycol.
5. An annular shear thickening fluid type damper comprises a damper shell, a squirrel cage elastic support arranged in the damper shell, a bearing arranged in the squirrel cage elastic support and a rotor rotating shaft penetrating through the bearing; the vibration damper is characterized in that an annular cavity is formed between the damper shell and the squirrel cage elastic support, two ends of the cavity are respectively provided with a sealing gasket to seal the cavity, the cavity is filled with shear thickening liquid, and the sealing gasket is an elastic sealing gasket and forms a buffering part for vibration of the squirrel cage elastic support together with the shear thickening liquid.
6. The annular shear thickening fluid type damper according to claim 5, wherein: and the outer circle of the sealing gasket is centered with the inner circle of the damper shell.
7. The annular shear thickening fluid type damper according to claim 6, wherein: the sealing gaskets are all made of polyethylene closed-cell foam plates.
8. The annular shear thickening fluid type damper according to claim 7, wherein: the damper shell is provided with a shear thickening liquid injection hole which penetrates through the shear thickening liquid cavity; a cavity sealing bolt is arranged in the shear thickening liquid injection hole.
9. The annular shear thickening fluid type damper according to claim 6, 7 or 8, wherein: a gap is reserved between the inner circle of the sealing gasket and the squirrel cage elastic support, the outer side of one sealing gasket is blocked by a step reserved on the squirrel cage elastic support, and the outer side of the other sealing gasket is blocked by a locking nut.
10. A rotor-bearing system having an annular shear thickening fluid type damper as defined in any one of claims 1 to 9, wherein: the device comprises two supporting systems, a rotor rotating shaft and a driving motor for driving the rotor rotating shaft to rotate; the two supporting systems respectively comprise a shell of an annular shear thickening fluid type damper, a squirrel cage elastic support and a bearing, and a rotor rotating shaft sequentially runs through the bearings in the two supporting systems.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110307225.1A CN113090710B (en) | 2021-03-23 | 2021-03-23 | Annular shear thickening fluid type damper and rotor-support system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110307225.1A CN113090710B (en) | 2021-03-23 | 2021-03-23 | Annular shear thickening fluid type damper and rotor-support system |
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| Publication Number | Publication Date |
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| CN113090710A true CN113090710A (en) | 2021-07-09 |
| CN113090710B CN113090710B (en) | 2022-10-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110307225.1A Active CN113090710B (en) | 2021-03-23 | 2021-03-23 | Annular shear thickening fluid type damper and rotor-support system |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1106604A (en) * | 1965-11-15 | 1968-03-20 | Shell Int Research | An improved device and method for effecting a coupling |
| US20170037668A1 (en) * | 2014-03-31 | 2017-02-09 | Grass Gmbh & Co. Kg | Device for damping movement |
| US9752639B2 (en) * | 2015-06-26 | 2017-09-05 | Palo Alto Research Center Incorporated | Fluids having a controlled stress response characteristic |
| CN108748253A (en) * | 2018-08-14 | 2018-11-06 | 上海岭先机器人科技股份有限公司 | A kind of joint of robot based on non-newtonian fluid |
| CN109058380A (en) * | 2018-07-31 | 2018-12-21 | 中国航发湖南动力机械研究所 | Mouse cage bullet branch metal-rubber damper |
| CN109185387A (en) * | 2018-11-12 | 2019-01-11 | 大连交通大学 | Elastic bearing active hydraulic shock-absorbing device and its rotor experiment table |
| CN109764080A (en) * | 2019-03-12 | 2019-05-17 | 上海理工大学 | A kind of oscillation of rotary machine rotor control system using shear thickening fluid damper |
-
2021
- 2021-03-23 CN CN202110307225.1A patent/CN113090710B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1106604A (en) * | 1965-11-15 | 1968-03-20 | Shell Int Research | An improved device and method for effecting a coupling |
| US20170037668A1 (en) * | 2014-03-31 | 2017-02-09 | Grass Gmbh & Co. Kg | Device for damping movement |
| US9752639B2 (en) * | 2015-06-26 | 2017-09-05 | Palo Alto Research Center Incorporated | Fluids having a controlled stress response characteristic |
| CN109058380A (en) * | 2018-07-31 | 2018-12-21 | 中国航发湖南动力机械研究所 | Mouse cage bullet branch metal-rubber damper |
| CN108748253A (en) * | 2018-08-14 | 2018-11-06 | 上海岭先机器人科技股份有限公司 | A kind of joint of robot based on non-newtonian fluid |
| CN109185387A (en) * | 2018-11-12 | 2019-01-11 | 大连交通大学 | Elastic bearing active hydraulic shock-absorbing device and its rotor experiment table |
| CN109764080A (en) * | 2019-03-12 | 2019-05-17 | 上海理工大学 | A kind of oscillation of rotary machine rotor control system using shear thickening fluid damper |
Non-Patent Citations (2)
| Title |
|---|
| 赵倩: "《剪切增稠阻尼在转子系统振动控制中的应用研究》", 《东北大学》 * |
| 赵倩: "《剪切增稠阻尼在转子系统振动控制中的应用研究》", 《东北大学》, 5 July 2016 (2016-07-05), pages 1 - 115 * |
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| CN113090710B (en) | 2022-10-11 |
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