CN110886812A - Symmetrical continuous integral squeeze film damper - Google Patents
Symmetrical continuous integral squeeze film damper Download PDFInfo
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- CN110886812A CN110886812A CN201911175444.8A CN201911175444A CN110886812A CN 110886812 A CN110886812 A CN 110886812A CN 201911175444 A CN201911175444 A CN 201911175444A CN 110886812 A CN110886812 A CN 110886812A
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- damper
- main body
- rotor
- damping liquid
- damping
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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
- F16F15/161—Suppression of vibrations in rotating systems by making use of members moving with the system using a fluid or pasty material characterised by the fluid damping devices, e.g. passages, orifices
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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
- F16F15/167—Suppression of vibrations in rotating systems by making use of members moving with the system using a fluid or pasty material having an inertia member, e.g. ring
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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
- F16F15/18—Suppression of vibrations in rotating systems by making use of members moving with the system using electric, magnetic or electromagnetic means
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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
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/06—Magnetic or electromagnetic
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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
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/12—Fluid damping
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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
- F16F2224/00—Materials; Material properties
- F16F2224/04—Fluids
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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
- F16F2224/00—Materials; Material properties
- F16F2224/04—Fluids
- F16F2224/045—Fluids magnetorheological
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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
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/06—Stiffness
- F16F2228/066—Variable stiffness
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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
- F16F2232/00—Nature of movement
- F16F2232/02—Rotary
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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
- F16F2238/00—Type of springs or dampers
- F16F2238/04—Damper
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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)
- Electromagnetism (AREA)
- Support Of The Bearing (AREA)
Abstract
The invention discloses a symmetrical continuous integral squeeze film damper, which comprises a damper main body, wherein the damper main body is connected with a rotor through a bearing; the damper main body is further provided with an annular groove-shaped damping liquid storage space, and the damping liquid storage space is communicated with the damping liquid film accommodating space along the axis direction of the rotor. Under the action of extrusion, the damping liquid in the damping liquid film accommodating space can form an extrusion oil film to generate continuous and stable damping force. When the damping fluid is magnetorheological fluid, different damping forces can be obtained by controlling the current of the electromagnetic coil in the damper main body.
Description
Technical Field
The invention relates to a symmetrical continuous integral type squeeze film damper for improving rotor vibration in rotary machinery, which can be applied to high-speed rotary machinery such as aerospace engines, heavy gas turbines, steam turbines, turbine pumps and the like.
Background
With the rapid development of high-speed rotating machinery such as aerospace engines, heavy gas turbines, steam turbines and turbine pumps, the problem of vibration during operation is more and more prominent. Due to the rotor having the faults of unbalance, misalignment, collision and abrasion, the rotating machine will generate vibration and noise when rotating at high speed. If the vibration is too large and is not effectively controlled, the machine is damaged and the people are killed in serious conditions, and huge casualties and economic losses are caused.
The solution to the problem of high speed rotating machine vibration is generally considered from three aspects: firstly, unbalance and out-of-alignment faults of the rotor are reduced as much as possible, and input of vibration energy in a rotor system is reduced; secondly, increasing the damping of a rotor system by applying a damper, increasing a damping seal and the like, and dissipating the vibration energy of the rotor by using the action of the damping force; thirdly, the mass and the rigidity of the rotor system are changed, the natural frequency of the rotor system is changed, the working rotating speed of the rotor is far away from the critical rotating speed of the rotor system, and the vibration response of the rotor system is reduced.
Dampers commonly used in rotary machines include elastic ring squeeze film dampers, squirrel cage squeeze film dampers, magnetorheological fluid dampers, and the like. The most common squirrel-cage squeeze film damper has the advantages of simple structure, small installation space, good vibration damping effect and the like, and is widely applied to aeroengines. However, when the design is unreasonable or under the working conditions of large load, sudden unbalance and the like, the squirrel-cage squeeze film damper has a series of nonlinear problems such as bistable response, locking, uncoordinated precession and even chaotic motion, and not only cannot achieve the vibration damping effect, but also has the phenomena of vibration enlargement, jumping, no criticality and the like.
Disclosure of Invention
In order to solve the problems of the traditional damper, the invention provides a symmetrical continuous integral squeeze film damper. Aiming at the vibration problem in the rotor system, the designed damper is arranged between the bearing and the bearing seat at the rotor support, so that the support rigidity of the rotor system can be effectively reduced, and the critical rotating speed of the rotor system is reduced; in addition, the squeeze film area in the damper can provide additional linear damping for the rotor system, dissipate the vibration energy of the rotor system, improve the stability of the rotor system and ensure that the rotor can safely and stably run for a long time. The symmetrical continuous integral squeeze film damper adopts a symmetrical continuous structure in a 'Taiji' shape, has lower rigidity, can effectively reduce the critical rotating speed of a rotor system, enables the working rotating speed of a rotor to be far away from a critical rotating speed area, and enables the rotor to safely and stably pass through the critical rotating speed when in operation; meanwhile, continuous and stable linear damping force can be provided to act on the rotor system, continuous vibration caused by common faults such as unbalance, misalignment, collision and abrasion and impact vibration caused by sudden change working conditions of the rotor system are inhibited, and vibration energy is dissipated; in addition, the damper is also provided with an electromagnetic coil, magnetorheological fluid can be adopted as damping fluid in the damper, and the magnitude of the damping force provided by the damper can be changed by controlling the magnitude of current in the electromagnetic coil so as to deal with the vibration conditions of the rotor system in different degrees, thereby realizing the active control of the vibration of the rotor system. The damper has the advantages of simple structure, good vibration damping performance, good practicability, strong applicability and the like, and can be widely applied to rotating machinery such as gas turbines, steam turbines, turbine pumps and the like.
In order to achieve the purpose, the technical scheme adopted by the invention is that the symmetrical continuous integral squeeze film damper comprises a damper main body, wherein the damper main body is connected with a rotor through a bearing, and a damping liquid film accommodating space penetrating through the damper main body is arranged on the damper main body along the axial direction of the rotor; the damper main body is further provided with an annular groove-shaped damping liquid storage space, and the damping liquid storage space is communicated with the damping liquid film accommodating space along the axis direction of the rotor.
The projection of the damping liquid film accommodating space on the axial vertical plane of the rotor is a single-section or multi-section circular arc.
The single or multiple circular arcs are evenly distributed around the axis of the rotor.
The damper is characterized in that a symmetrical continuous elastic body is arranged on the damper main body, the projection of the symmetrical continuous elastic body on the axis vertical plane is a centrosymmetric continuous uneven circular arc structure, the circular arc structure is in a 'Tai Chi' shape, and the circular arc structure is formed by connecting a plurality of sections of circular arcs.
The end part of the damper main body in the axial direction of the rotor is provided with an end cover, and the end cover and the damper main body jointly form a closed damping liquid storage space for storing sufficient damping liquid.
An elastic sealing element is arranged between the end cover and the damper main body.
The damper main body is provided with an electromagnetic coil.
The damping fluid adopts lubricating oil, dimethyl silicone oil or magnetorheological fluid and the like.
The invention has the technical effects that:
the invention relates to a symmetrical continuous integral squeeze film damper, wherein a damper main body is provided with a damping liquid film accommodating space and penetrates through the damper main body along the axial direction of a rotor. The damper main body is also provided with a damping liquid storage space for storing damping liquid, and the space is communicated with the damping liquid film accommodating space along the axis direction of the rotor, so that continuous damping liquid is provided for the damping liquid film accommodating space without a complex damping liquid supply system. Under the action of extrusion, the damping liquid in the damping liquid film accommodating space can form an extrusion oil film to generate continuous and stable damping force. When the damping fluid is magnetorheological fluid, different damping forces can be obtained by controlling the current of the electromagnetic coil in the damper main body.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a symmetrical continuous integral squeeze-oil film damper according to the present invention.
FIG. 2 is a schematic axial view of an embodiment of a symmetrical continuous integral squeeze-oil film damper according to the present invention.
The designations in the figures illustrate the following:
101. a damper main body; 102. an elastomeric seal; 103. an end cap; 104. a bearing; 105. a rotor; 106. a bearing seat; 107. an electromagnetic coil; 108. a damping fluid storage space; 109. damping liquid film accommodating space; 201. a symmetrical continuous elastomer;
Detailed Description
The technical solution of the present invention will be described in detail below with reference to the embodiments in the drawings.
As shown in fig. 1, the symmetrical continuous type integral squeeze-oil film damper includes a damper body 101. The damper main body 101 and the rotor 105 are connected by a bearing 104 and fixed to a bearing housing 106. The rotor 105 is a rotating body similar to a rotating shaft in a rotating machine, and may generate severe vibration due to a fault such as misalignment, unbalance, rubbing, or the like during high-speed rotation. The damper body 101 is provided with a damping liquid film accommodating space 109 and penetrates the damper body 101 in the axial direction of the rotor 105. The damping liquid film accommodating space 109 has a function of accommodating damping liquid, so that the damping liquid forms a film in the space. The vibration energy generated when the rotor 105 rotates at a high speed is transmitted to the damper main body 101 through the bearing 104, the damping liquid film in the damping liquid film accommodating space 109 is squeezed to form a squeezing oil film, and the generated damping force absorbs the vibration energy, thereby achieving the purpose of vibration reduction. A damping fluid storage space 108 is further provided in the damper main body 101 at one side or both sides of the damper main body 101 in the axial direction of the rotor 105 for storing a required damping fluid. The damping liquid storage space 108 is a closed space formed by the damper main body 101, the elastic sealing element 102 and the end cover 103, and the damping liquid storage space 108 is communicated with the damping liquid film accommodating space 109 along the axial direction of the rotor 105, so that sufficient damping liquid is provided for the damping liquid film accommodating space 109, a continuous and stable damping liquid film can be formed in the damping liquid film accommodating space 109, and the damper main body 101 is ensured to have a good vibration damping effect.
Fig. 2 is an end view of the damper body 101 (i.e., a view in the axial direction of the rotor 105). It can be seen from fig. 1 and 2 that the damping fluid storage space 108 is an annular groove structure. In fig. 2, the sum of the primary damping liquid film accommodating space 201 and the secondary damping liquid film accommodating space 202 is the damping liquid film accommodating space 109, and the damping liquid film accommodating space 109 penetrates through the damper body 101 along the axial direction of the rotor 105. It can be seen that in this view, the primary damping liquid film accommodating space 201 and the secondary damping liquid film accommodating space 202 are both arc-shaped, wherein the primary damping liquid film accommodating space 201 is an arc taking a projection point of the axis of the rotor 105 on the plane as a center of circle, the secondary damping liquid film accommodating space 202 is a tai chi shape consisting of multiple sections of arcs, and the primary damping liquid film accommodating space 201 and the secondary damping liquid film accommodating space 202 are uniformly distributed around the axial lead of the rotor 105. The solid damper main body 101 at the position is divided into continuous multi-segment arc entities by the multi-segment arcs in the secondary damping liquid film accommodating space 202, so that the symmetrical continuous elastomer 203 is formed. In order to adapt to different working conditions, different damping forces can be obtained by changing the geometric dimensions of the main damping liquid film accommodating space 201 and the auxiliary damping liquid film accommodating space 202, and different rigidities can be obtained by changing the geometric dimensions, the position distribution and other parameters of the symmetrical continuous elastic body 203.
The operation of the above-described embodiment of the present invention will be briefly described below.
When the rotor 105 has faults of unbalance, collision and abrasion and the like, the symmetrical continuous elastic body 203 in the damper main body 101 has lower rigidity, so that the damper main body 101 becomes an elastic support, the critical rotating speed of the rotor 105 is reduced, meanwhile, violent vibration generated by the rotor 105 rotating at a high speed is transmitted to the damper main body 101 through the bearing 104, and a damping liquid film in the damping liquid film accommodating space 109 generates an extrusion oil film effect through an extrusion effect, so that a damping force is generated to absorb energy generated by the vibration of the rotor 105, and the aim of vibration reduction is achieved.
In addition, the magnetorheological fluid can change certain physical properties of the magnetorheological fluid under the action of a magnetic field, such as viscosity. If the magnetorheological fluid is used as the damping fluid of the damper body 101, the magnetorheological fluid (damping fluid) with the required viscosity can be obtained to generate the squeeze film effect by controlling the current in the electromagnetic coil 107 according to the vibration condition of the rotor 105, so that the proper damping force is provided to absorb the vibration energy of the rotor 105, and the active control of the vibration of the rotor 105 is realized.
In the above process, the damping liquid storage space 108 stores sufficient damping liquid to continuously provide the damping liquid required by the damping liquid film accommodating space 109, so that the damping liquid film in the damping liquid film accommodating space 109 is continuously maintained. Meanwhile, the damper main body 101, the elastic sealing member 102 and the end cover 103 together form a closed damping fluid storage space 108, so that the damping fluid in the damping fluid storage space 108 can not leak, and can maintain a certain pressure.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereby. The invention is intended to cover all modifications, adaptations, and equivalent variations or equivalent arrangements, which may be included within the scope of the invention, or which may be applied directly or indirectly to other related art, based on the principle and principle of the present invention.
Claims (8)
1. The utility model provides a symmetrical continuous type integral squeeze film damper which characterized in that: the damper comprises a damper main body, wherein the damper main body is connected with a rotor through a bearing, and a damping liquid film accommodating space penetrating through the damper main body is arranged on the damper main body along the axial direction of the rotor; the damper main body is further provided with an annular groove-shaped damping liquid storage space, and the damping liquid storage space is communicated with the damping liquid film accommodating space along the axis direction of the rotor.
2. The symmetrical continuous integral squeeze-oil film damper according to claim 1, wherein: the projection of the damping liquid film accommodating space on the axial vertical plane of the rotor is a single-section or multi-section circular arc.
3. The symmetrical continuous integral squeeze-oil film damper according to claim 1, wherein: the single or multiple circular arcs are evenly distributed around the axis of the rotor.
4. The symmetrical continuous integral squeeze-oil film damper according to claim 1, wherein: the damper is characterized in that a symmetrical continuous elastic body is arranged on the damper main body, the projection of the symmetrical continuous elastic body on the axis vertical plane is a centrosymmetric continuous uneven circular arc structure, and the circular arc structure is formed by connecting a plurality of sections of circular arcs.
5. The symmetrical continuous integral squeeze-oil film damper according to claim 1, wherein: the end part of the damper main body in the axial direction of the rotor is provided with an end cover, and the end cover and the damper main body jointly form a closed damping liquid storage space for storing sufficient damping liquid.
6. The symmetrical continuous integral squeeze-oil film damper according to claim 1, wherein: an elastic sealing element is arranged between the end cover and the damper main body.
7. The symmetrical continuous integral squeeze-oil film damper according to claim 1, wherein: the damper main body is provided with an electromagnetic coil.
8. The symmetrical continuous integral squeeze-oil film damper according to claim 1, wherein: the damping fluid adopts lubricating oil, dimethyl silicone oil or magnetorheological fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911175444.8A CN110886812A (en) | 2019-11-26 | 2019-11-26 | Symmetrical continuous integral squeeze film damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911175444.8A CN110886812A (en) | 2019-11-26 | 2019-11-26 | Symmetrical continuous integral squeeze film damper |
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| Publication Number | Publication Date |
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| CN110886812A true CN110886812A (en) | 2020-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911175444.8A Pending CN110886812A (en) | 2019-11-26 | 2019-11-26 | Symmetrical continuous integral squeeze film damper |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022041793A (en) * | 2020-08-31 | 2022-03-11 | 哈爾濱工程大学 | Low noise main bearing cover of internal combustion engine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004211729A (en) * | 2002-12-27 | 2004-07-29 | Bridgestone Corp | Torsional damper and its manufacturing method |
| CN102705427A (en) * | 2012-06-12 | 2012-10-03 | 中国科学院工程热物理研究所 | Squeeze film damper |
| CN108487949A (en) * | 2018-06-28 | 2018-09-04 | 西安交通大学 | A kind of aero-engine adaptive damping squeeze film damper |
| CN109139796A (en) * | 2018-10-22 | 2019-01-04 | 沈阳航空航天大学 | A kind of fixed end seal formula squeeze film damper |
| CN109611495A (en) * | 2018-11-30 | 2019-04-12 | 北京化工大学 | Rotor damper |
-
2019
- 2019-11-26 CN CN201911175444.8A patent/CN110886812A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004211729A (en) * | 2002-12-27 | 2004-07-29 | Bridgestone Corp | Torsional damper and its manufacturing method |
| CN102705427A (en) * | 2012-06-12 | 2012-10-03 | 中国科学院工程热物理研究所 | Squeeze film damper |
| CN108487949A (en) * | 2018-06-28 | 2018-09-04 | 西安交通大学 | A kind of aero-engine adaptive damping squeeze film damper |
| CN109139796A (en) * | 2018-10-22 | 2019-01-04 | 沈阳航空航天大学 | A kind of fixed end seal formula squeeze film damper |
| CN109611495A (en) * | 2018-11-30 | 2019-04-12 | 北京化工大学 | Rotor damper |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022041793A (en) * | 2020-08-31 | 2022-03-11 | 哈爾濱工程大学 | Low noise main bearing cover of internal combustion engine |
| JP7072914B2 (en) | 2020-08-31 | 2022-05-23 | 哈爾濱工程大学 | Low noise main bearing cover for internal combustion engine |
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Application publication date: 20200317 |
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