CN111156275A - Improved generation squeeze film damper with cooling device - Google Patents
Improved generation squeeze film damper with cooling device Download PDFInfo
- Publication number
- CN111156275A CN111156275A CN202010105918.8A CN202010105918A CN111156275A CN 111156275 A CN111156275 A CN 111156275A CN 202010105918 A CN202010105918 A CN 202010105918A CN 111156275 A CN111156275 A CN 111156275A
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- Prior art keywords
- damper
- cooling
- oil
- oil film
- bearing
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000001816 cooling Methods 0.000 title claims abstract description 92
- 239000002826 coolant Substances 0.000 claims abstract description 14
- 239000003921 oil Substances 0.000 claims description 90
- 239000000110 cooling liquid Substances 0.000 claims description 12
- 239000010687 lubricating oil Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 238000013016 damping Methods 0.000 abstract description 20
- 230000000694 effects Effects 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 7
- 230000000875 corresponding effect Effects 0.000 description 16
- 239000000112 cooling gas Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 239000003570 air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 210000003739 neck Anatomy 0.000 description 1
Images
Classifications
-
- 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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
-
- 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
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
- F16F15/0237—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means involving squeeze-film damping
-
- 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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/42—Cooling arrangements
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Support Of The Bearing (AREA)
Abstract
The invention relates to an improved squeeze film damper with a cooling device, which is sleeved outside a bearing and comprises an elastic support, wherein a bearing seat is arranged outside the bearing, the head of the elastic support is connected with an inner ring of a damper, the bearing seat is connected with an outer ring of the damper, a rotor is sleeved in the bearing, a gap between the outer ring of the damper and the inner ring of the damper is an oil film gap, an oil supply groove is arranged on the outer ring of the damper, an oil supply hole is formed in the oil supply groove and is arranged outside the oil film gap, and the cooling device is arranged in the way that: processing a plurality of axial hole type cooling pipelines on the outer ring of the damper, wherein the cooling pipelines are sequentially connected by oil connecting pipes; or an annular cavity is arranged in the outer ring of the damper, and the top of the annular cavity is provided with a cooling medium supply hole. The damper is simple in structure, can obtain a good cooling effect, realizes effective cooling of an oil film in the working process of the damper, and further improves the damping effect of the oil film.
Description
The technical field is as follows:
the invention belongs to the technical field of damper design, and particularly relates to an improved squeeze film damper with a cooling device.
Background art:
the squeeze film damper is a vibration damper for inhibiting vibration, and is characterized by that the interference fit between bearing outer ring and bearing seat is changed into proper clearance fit, and the gap position is filled with lubricating oil to form oil film. The rotor has a simple structure and a remarkable effect of suppressing vibration of the rotor due to factors such as unbalanced force, and therefore, the rotor is widely applied to rotary machines such as an aircraft engine.
The vibration reduction principle of the traditional squeeze oil film damper is that a rotor can squeeze an oil film in the rotating process, the oil film can generate oil film damping when being squeezed, and kinetic energy transmitted to a support by the rotor is converted into internal energy through viscous damping of the oil film, so that the vibration reduction effect is achieved. Therefore, this parameter of oil film damping is extremely important to the overall engine performance. However, in the working process of the squeeze film damper, the kinetic energy of the rotor vibration is converted into the internal energy, and the temperature of the oil film is increased at the same time. As the temperature of the oil film rises, the viscosity of the lubricating oil decreases, the damping coefficient of the oil film decreases, and the damper cannot exert a good damping effect, resulting in a poor damping effect. In recent years, in order to improve the oil film damping and rigidity and reduce the vibration of an engine, on the basis of the traditional squeeze oil film damper, people provide a porous ring, a floating magnetic ring, an elastic ring type, a permanent magnet bearing and other novel dampers by changing the structure of the damper. However, the structural forms of the dampers are continuously improved, and the problems that the oil film temperature of the dampers is increased due to the extrusion of the shaft necks, the oil film damping is reduced, and the vibration reduction effect is poor are not solved. Therefore, the damper capable of reducing the temperature of the oil film and improving the oil film damping has important industrial application value.
The invention content is as follows:
the invention aims to overcome the defects in the prior art and provide an improved squeeze film damper with a cooling device, aiming at the problems that the oil film temperature of the squeeze film damper is increased, the damping is reduced and the damping effect is weakened. The oil film temperature can be effectively reduced, the oil film temperature rise is restrained, the oil film damping is improved, the energy generated by the vibration of the rotor is more efficiently absorbed, and the stability of a rotor system is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an improved generation squeeze film attenuator with cooling device, the bearing outside is located to the cover, including elastic support, the bearing outside be equipped with the bearing frame, the elastic support head connect the attenuator inner circle, the bearing frame connect the attenuator outer lane, the bearing endotheca rotor is equipped with, attenuator outer lane and attenuator inner circle clearance setting, the clearance be the oil film clearance, the attenuator outer lane be equipped with the oil feed tank, the oil feed hole has been seted up to the oil feed tank, the oil feed hole locate the oil film clearance outside, cooling device setting mode is one of following mode:
processing a plurality of axial hole type cooling pipelines on the outer ring of the damper, wherein the cooling pipelines are sequentially connected by oil connecting pipes;
and (II) an annular cavity is arranged in the outer ring of the damper, and a cooling medium supply hole is formed in the top of the annular cavity.
In the first mode, a cooling medium is introduced into the cooling pipeline to cool the damper.
In the second mode, cooling medium is introduced into the annular cavity through the liquid supply holes to cool the damper.
In the second mode, rib blocks are arranged in the annular cavity, the rib blocks are uniformly arranged along the circumferential direction, a plurality of groups are circumferentially arranged on the rib blocks, 2 rows are axially arranged, and the specific number is determined according to the actual situation.
The cooling medium is cooling liquid or cooling gas, the cooling liquid is water or lubricating oil, and the cooling gas is air.
This patent theory of operation:
when the rotor works, vibration is generated and an oil film is extruded, the oil film converts the kinetic energy of the vibration into internal energy, so that the temperature of the oil film is increased, and the calculation formula of oil film damping is as follows
According to the above formula, d0And mu are positively correlated. When other variables are constant, the oil film temperature is increased, and the oil film viscosity mu is reduced, thereby causing the oil film damping d0And the damping effect of the damper is reduced and finally influenced. After the cooling liquid is introduced into the cooling device, the cooling liquid can absorb the oil film and the internal energy of the outer ring of the damper in a heat conduction mode, so that the temperature of the oil film is reduced, the damping of the oil film is improved, the damper can better play a role in vibration reduction, and the stability of a rotor system is improved.
The invention has the beneficial effects that:
1. the damper has a simple structure, and on the basis of extruding the oil film damper, a plurality of axial hole type cooling pipelines are processed on the outer ring of the damper or an annular cavity is processed on the outer side of the oil film, so that the manufacturing difficulty and the processing cost of the process are hardly increased.
2. The cooling effect is good. The internal energy of the oil film can be quickly absorbed by introducing cooling liquid into the cooling pipeline or the annular cavity, so that the temperature of the oil film is effectively reduced, and the temperature rise of the oil film is inhibited.
3. The selection range of the cooling liquid is wide, and the cooling liquid in the cooling device is not limited to lubricating oil, and water, air and the like can be introduced to cool the oil film.
4. The vibration reduction effect is good. In the working process of the damper, the temperature of the oil film rises, and the damping of the oil film is reduced. The oil film temperature can be reduced through the cooling device, the oil film damping is improved, and the vibration is restrained more effectively.
Description of the drawings:
FIG. 1 is a sectional view of a cooling line type squeeze film damper according to embodiment 1 of the present invention;
FIG. 2 is a left side view of a cooling line type squeeze film damper axial pass cooling line of embodiment 1 of the present invention;
FIG. 3 is a right side view of a cooling line type squeeze film damper axial pass cooling line of embodiment 1 of this invention;
FIG. 4 is a sectional view of an annular chamber squeeze film damper of embodiment 2 of this invention;
FIG. 5 is an axial partial view of an annular cavity squeeze film damper of embodiment 2 of this invention wherein:
1-elastic support; 2-oil film; 3-oil supply holes; 4-oil supply groove; 5-a rotor; 6-inner ring of damper; 7-damper outer ring; 8-pass cooling pipes; 9-connecting an oil pipe; 10-ring cavity; 11-a rib block; 12-a ring cavity oil outlet; 13-annular cavity oil supply holes; a-1, numbering a of the pipe orifice of the cooling pipeline, and numbering 1 of the corresponding cooling pipeline; b '-2-the number of the cooling pipeline orifice is b', and the number of the corresponding cooling pipeline is 2; b-2-the number of the pipe orifice of the cooling pipeline is b, and the number of the corresponding cooling pipeline is 2; c-3, numbering the pipe orifice of the cooling pipeline as c, and numbering the corresponding cooling pipeline as 3; d-4-the number of the pipe orifice of the cooling pipeline is d, and the number of the corresponding cooling pipeline is 4; e-5-the number of the pipe orifice of the cooling pipeline is e, and the number of the corresponding cooling pipeline is 5; f-6, numbering f for the pipe orifice of the cooling pipeline, and numbering 6 for the corresponding cooling pipeline; g-7, numbering the pipe orifice of the cooling pipeline as g, and numbering the pipe orifice of the corresponding cooling pipeline as 7; h-8, numbering the pipe orifice of the cooling pipeline as h, and numbering the cooling pipeline as 8 correspondingly; a '-1, the number of the cooling pipeline orifice is a', and the number of the corresponding cooling pipeline is 1; c '-3-the number of the cooling pipeline orifice is c', and the number of the corresponding cooling pipeline is 3; d '-4-the number of the cooling pipeline orifice is d', and the number of the corresponding cooling pipeline is 4; e '-5-the number of the cooling pipeline orifice is e', and the number of the corresponding cooling pipeline is 5; f '-6-the number of the cooling pipeline orifice is f', and the number of the corresponding cooling pipeline is 6; g '-7-the number of the cooling pipeline orifice is g', and the number of the corresponding cooling pipeline is 7; h '-8-the number of the cooling pipeline orifice is h', and the number of the corresponding cooling pipeline is 8.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to examples.
The utility model provides an improved generation squeeze film attenuator with cooling device, the bearing outside is located to the cover, including elastic support, the bearing outside be equipped with the bearing frame, the elastic support head connect the attenuator inner circle, the bearing frame connect the attenuator outer lane, the bearing endotheca rotor is equipped with, attenuator outer lane and attenuator inner circle clearance setting, the clearance be the oil film clearance, the attenuator outer lane be equipped with the oil feed tank, the oil feed hole has been seted up to the oil feed tank, the oil feed hole locate the oil film clearance outside, cooling device setting mode is one of following mode:
processing a plurality of axial hole type cooling pipelines on the outer ring of the damper, wherein the cooling pipelines are sequentially connected by oil connecting pipes;
and (II) an annular cavity is arranged in the outer ring of the damper, and a cooling medium supply hole is formed in the top of the annular cavity.
In the first mode, a cooling medium is introduced into the cooling pipeline to cool the damper.
In the second mode, cooling medium is introduced into the annular cavity through the liquid supply holes to cool the damper.
In the second mode, rib blocks are arranged in the annular cavity, the rib blocks are uniformly arranged along the circumferential direction, a plurality of groups are circumferentially arranged on the rib blocks, 2 rows are axially arranged, and the specific number is determined according to the actual situation.
The cooling medium is cooling liquid or cooling gas, the cooling liquid is water or lubricating oil, and the cooling gas is air.
In order that the contents of this patent may be more readily understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
Example 1
An improved squeeze film damper with a cooling device is shown in a sectional view in fig. 1 and comprises a damper outer ring 7 and an elastic support 1, wherein an extension section of the elastic support 1 is fixedly connected with a damper inner ring 6. And a gap between the damper outer ring 7 and the damper inner ring 6 is filled with lubricating oil to form an oil film 2. An annular groove is arranged on the outer side of the oil film 2 and serves as an oil supply groove 4, the oil supply groove 4 is communicated with an oil supply hole 3 of the outer ring of the damper, and a rotor 5 is fixedly sleeved in the bearing.
In this embodiment, a first cooling manner is adopted, and specifically, a plurality of axial hole type cooling pipelines 8 are machined in the circumferential direction of the squeeze film damper outer ring 7. The cooling line 8 is outside the oil film 2, avoiding the oil supply groove 4 and the oil supply hole 3, as shown in fig. 1. For ease of understanding, the cooling line nozzles and cooling lines corresponding to the nozzles are labeled herein with letters and numbers. The orifices of the cooling pipelines a 'b', bc, c'd', de, e 'f', fg and g 'h' are sequentially connected through the oil connecting pipe 9, the left view of the hole-type cooling pipeline is shown in figure 2, and the right view of the hole-type cooling pipeline is shown in figure 3. The cooling liquid flows in from the port a, flows through the cooling pipeline No. 1, flows into the oil connecting pipe from the port a ', flows into the cooling pipeline No. 2 from the port b ' through the oil connecting pipe, flows into the oil connecting pipe from the port b through the cooling pipeline No. 2, and so on, finally flows through the cooling pipeline No. 8 through the port h ', and flows out from the port h. The number of the cooling pipes in fig. 2 is eight, but not limited thereto.
Example 2
An improved squeeze film damper with a cooling device, in particular to an annular cavity type squeeze film damper, the sectional view of which is shown in figure 4, comprises a damper outer ring 7 and an elastic support 1, wherein the extension section of the elastic support 1 is fixedly connected with a damper inner ring 6. And a gap between the damper outer ring 7 and the damper inner ring 6 is filled with lubricating oil to form an oil film 2. An annular groove is arranged on the outer side of the oil film 2 and serves as an oil supply groove 4, the oil supply groove 4 is communicated with an oil supply hole 3 of the outer ring of the damper, and a rotor 5 is fixedly sleeved in the bearing.
In the embodiment, a second cooling mode is adopted, and a ring cavity 9 is processed on the outer ring of the damper by casting and other processes at two sides of the oil supply hole of the squeeze film damper, and the ring cavity is provided with a specific oil supply hole 13 and a specific oil outlet hole 12. As shown in fig. 4. The annular cavity is internally provided with a plurality of rib blocks 11, and an axial partial view of the annular cavity type squeeze film damper is shown in figure 5, so that the rigidity of the annular cavity can be ensured, and the phenomenon that the annular cavity deforms in the working process to influence the damping effect of the damper is prevented. The material of the rib block is the same as that of the outer ring of the damper. The annular chamber is not compressed by the journal during operation and therefore only acts as a cooling oil film. The coolant flows in from the annular chamber oil supply hole 13 and flows out from the annular chamber oil outlet hole 12.
Claims (5)
1. The utility model provides an improved generation squeeze film attenuator with cooling device, the bearing outside is located to the cover, a serial communication port, including elastic support, the bearing outside be equipped with the bearing frame, the elastic support head connect the attenuator inner circle, the bearing frame connect the attenuator outer lane, the bearing endotheca rotor is equipped with, attenuator outer lane and attenuator inner circle clearance setting, the clearance be the oil film clearance, the attenuator outer lane be equipped with the oil feeding groove, the oil feeding hole has been seted up to the oil feeding groove, the oil film clearance outside is located to the oil feeding hole, cooling device setting mode is one of following mode:
processing a plurality of axial hole type cooling pipelines on the outer ring of the damper, wherein the cooling pipelines are sequentially connected by oil connecting pipes;
and (II) an annular cavity is arranged in the outer ring of the damper, and a cooling medium supply hole is formed in the top of the annular cavity.
2. The improved squeeze film damper with cooling device as claimed in claim 1, wherein in the first mode, a cooling medium is introduced into the cooling pipeline to cool the damper.
3. The improved squeeze film damper with cooling of claim 1 wherein in mode two, cooling medium is introduced into the annular cavity through the liquid supply hole to cool the damper.
4. The improved squeeze film damper with cooling device as claimed in claim 1, wherein in mode two, the ring cavity is provided with rib blocks, the rib blocks are uniformly arranged along the circumferential direction, the rib blocks are circumferentially arranged in a plurality of groups, and the rib blocks are axially arranged in 2 rows, wherein the specific number is determined according to the actual situation.
5. The improved squeeze film damper with cooling device as claimed in claim 2 or 3, wherein said cooling medium is cooling liquid or cooling air, said cooling liquid is water or lubricating oil, and said cooling air is air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010105918.8A CN111156275A (en) | 2020-02-20 | 2020-02-20 | Improved generation squeeze film damper with cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010105918.8A CN111156275A (en) | 2020-02-20 | 2020-02-20 | Improved generation squeeze film damper with cooling device |
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| CN111156275A true CN111156275A (en) | 2020-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010105918.8A Pending CN111156275A (en) | 2020-02-20 | 2020-02-20 | Improved generation squeeze film damper with cooling device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111692211A (en) * | 2020-06-22 | 2020-09-22 | 奚志娴 | Magnetic suspension bearing with squeeze film damper |
| CN114856711A (en) * | 2022-05-12 | 2022-08-05 | 湖南科技大学 | Method and system for controlling vibration of rotor of turboshaft engine |
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| US5099966A (en) * | 1989-11-23 | 1992-03-31 | Mtu Motoren- Und Turbinen-Union Munchen Gmbh | Method and apparatus for regulating the damping of rotating masses |
| DE29912573U1 (en) * | 1999-07-19 | 1999-10-07 | Acecast Industry Co., Ltd., Tai Ping, Taichung | Cooling device for a bicycle shock absorber |
| CN105351374A (en) * | 2015-12-08 | 2016-02-24 | 新昌县红利机械有限公司 | Rolling bearing pedestal |
| CN107289061A (en) * | 2017-08-02 | 2017-10-24 | 汤树人 | A kind of electromagnetic fluid body damper with multimode damping characteristic |
| CN207750432U (en) * | 2018-01-13 | 2018-08-21 | 华东交通大学 | A kind of two-wire ring MR damper of external cooling device |
| CN207795958U (en) * | 2018-01-12 | 2018-08-31 | 华东交通大学 | A kind of MR damper of integrated self-cooling set |
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| CN211951292U (en) * | 2020-02-20 | 2020-11-17 | 沈阳航空航天大学 | Improved generation squeeze film damper with cooling device |
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2020
- 2020-02-20 CN CN202010105918.8A patent/CN111156275A/en active Pending
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| CN107289061A (en) * | 2017-08-02 | 2017-10-24 | 汤树人 | A kind of electromagnetic fluid body damper with multimode damping characteristic |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111692211A (en) * | 2020-06-22 | 2020-09-22 | 奚志娴 | Magnetic suspension bearing with squeeze film damper |
| CN113404776A (en) * | 2020-06-22 | 2021-09-17 | 奚志娴 | Magnetic suspension bearing with squeeze film damper |
| CN113404776B (en) * | 2020-06-22 | 2022-11-18 | 苏州喜全软件科技有限公司 | Magnetic suspension bearing with squeeze film damper |
| CN114856711A (en) * | 2022-05-12 | 2022-08-05 | 湖南科技大学 | Method and system for controlling vibration of rotor of turboshaft engine |
| CN114856711B (en) * | 2022-05-12 | 2023-09-15 | 湖南科技大学 | Method and system for controlling rotor vibration of turboshaft engine |
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