CN108916306A - A kind of heavy type rotor vibration-repressing device - Google Patents
A kind of heavy type rotor vibration-repressing device Download PDFInfo
- Publication number
- CN108916306A CN108916306A CN201810764919.6A CN201810764919A CN108916306A CN 108916306 A CN108916306 A CN 108916306A CN 201810764919 A CN201810764919 A CN 201810764919A CN 108916306 A CN108916306 A CN 108916306A
- Authority
- CN
- China
- Prior art keywords
- bearing
- sleeve
- bearing block
- rotor vibration
- support
- Prior art date
- 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.)
- Pending
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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
- 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
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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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/02—Rigid support of bearing units; Housings, e.g. caps, covers in the case of sliding-contact bearings
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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
- F16F15/02—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
- F16F15/04—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 elastic means
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- 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)
- Sliding-Contact Bearings (AREA)
Abstract
The invention discloses a kind of heavy rotor vibration-repressing devices, the present invention matches to form squeeze film damper by two O-ring seals with sleeve and bearing block, the effective damping being capable of increasing between sleeve and bearing block inhibits and reduces rotor and crosses critical speed Oscillation Amplitude；Disk spring support by using rigidity much smaller than bearing rigidity is supported sleeve, it can reduce support stiffness of the invention, add squeeze film, improve the effective damping of system, achieve the purpose that rotor reduces amplitude by critical speed, there is drop vibration, vibration suppression effect；The present invention has very big application value in large-scale rotor-support-foundation system.
Description
Technical field
The invention belongs to rotor design fields, and in particular to a kind of heavy type rotor vibration-repressing device.
Background technique
In the industrial production, in order to improve the power density of the heavy rotor apparatus such as steam turbine, turbine, generator, drop
Low material cost, while equipment working speed is often higher than first critical speed, the vibration excessively critical there are revolving speed in working rotor
Dynamic problem.Rotor draw ratio is big, and support span is also big, and the flexibility that rotor-support-foundation system at this time generally falls into rigid bearing support turns
Subsystem, when rotor-support-foundation system crosses critical speed, position of bearings is equivalent to node, and bearing can not provide effective damping, will lead to
Rotor amplitude when excessively critical is excessively high, in order to reduce rotor it is excessively critical when Oscillation Amplitude, need to improve effective resistance of system
Buddhist nun reduces the rigidity of system Support Position.However since rotor quality is big, bearing load is big, only adjusting bearing arrangement can not be shown
Write the rigidity and system effective damping for improving bearing.
System effective damping is improved in order to reduce amplitude, at present widely used addition squeeze film resistance in the industry
Buddhist nun's device, in addition it cooperates mouse cage support, is commonly used in the light-duty rotor of roller bearings, sets between bearing and bearing block
Squeeze film structure is counted, amplitude when reducing critical speed by increasing system damping, but mouse cage support cannot be used in heavy type
In rotor-support-foundation system, critical speed amplitude problems of too is crossed in heavy rotor, also needs new design scheme.
Summary of the invention
The purpose of the present invention is to overcome the above shortcomings and to provide a kind of heavy rotor vibration-repressing devices, can both increase system
Can change the rigidity at bearing block while damping again, in rotor oscillation, disk spring support seat at therewith vibration and by
Damping unit absorption system partial vibration energy reduces rotor oscillation amplitude, changes so that squeeze film plays the effect of damping
Be apt to existing squeeze film damper can not heavy duty, make whole system have good vibration damping, inhibition of vibration.
In order to achieve the above object, the present invention includes the bearing being set on axis, and bearing outside is equipped with sleeve, sleeve peripheral hardware
It is equipped with bearing block, there is gap, the both ends of sleeve outer surface are provided with O-ring seal, fill out in gap between sleeve and bearing block
Filled with lubricating oil, two O-ring seals match to form squeeze film damper with sleeve and bearing block, are arranged on bearing block
There is support plate, the butterfly spring seat withstood on sleeve is provided in support plate, the external molded line at the top of butterfly spring seat is fitted in
On sleeve, butterfly spring is provided between support plate and butterfly spring seat.
When bearing uses tilting-pad bearing, there are four the spherical supports contacted with tilting-pad bearing for setting on sleeve.
Spherical support is fixed by screws on sleeve.
Each spherical support is respectively supported at the middle part of the arc tile fragment outer surface of tilting-pad bearing.
The end face of sleeve and bearing in bearing block is provided with bearing (ball) cover, is provided with thrust metal on bearing (ball) cover,
Thrust bearing is provided on thrust metal.
Butterfly spring is using multiple rows of common support butterfly spring seat in parallel.
Bearing block uses split type structure, and junction is fixed using connection bolt.
Bearing block and between centers are sealed using black washer.
Bearing is using oval pad bearing, dislocation pad bearing, four oil liquid bearings or tilting-pad bearing.
Compared with prior art, the present invention matches to form extruding oil with sleeve and bearing block by two O-ring seals
Film damper, the effective damping being capable of increasing between sleeve and bearing block inhibit and reduce rotor and cross critical speed Oscillation Amplitude；
Disk spring support by using rigidity much smaller than bearing rigidity is supported sleeve, can reduce support of the invention
Rigidity adds squeeze film, improves the effective damping of system, achievees the purpose that rotor reduces amplitude by critical speed,
With drop vibration, vibration suppression effect；The present invention has very big application value in large-scale rotor-support-foundation system.
Further, it is provided with spherical support in the present invention, spherical support can effectively inhibit bearing axial float.
Further, butterfly spring of the invention can effectively be increased using multiple rows of common support butterfly spring seat in parallel
Enabling capabilities.
Further, bearing block of the invention uses split type structure, can be convenient for component assembly and lubrication.
Further, bearing block of the invention and between centers are sealed using black washer, can be stopped oil leakage, be guaranteed simultaneously
The axially position of thrust bearing.
Detailed description of the invention
Fig. 1 is the schematic diagram when present invention uses oval pad bearing；
Fig. 2 is the side view of Fig. 1；
Fig. 3 is the schematic diagram when present invention uses tilting-pad bearing；
Fig. 4 is the side view of Fig. 3；
Fig. 5 is the enlarged drawing in Fig. 4 at II；
Wherein, 1 be support plate, 2 be butterfly spring, 3 be butterfly spring seat, 4 be screw, 5 be sleeve, 6 be connection bolt,
7 it is bearing block, 8 be bearing, 9 be gasket, 10 be black washer, 11 be thrust bearing, 12 be head bolts, 13 is thrust bearing
Seat, 14 be bearing (ball) cover, 15 be axis, 16 be spherical support, 17 be O-ring seal, 18 be squeeze film damper.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing.
Referring to Fig. 1, Fig. 2 and Fig. 5, the present invention includes the bearing 8 being set on axis 15, is arranged with sleeve 5 outside bearing 8, is covered
It is provided with bearing block 7 outside cylinder 5, there is gap, the both ends of 5 outer surface of sleeve are provided with O-shaped sealing between sleeve 5 and bearing block 7
17 are enclosed, lubricating oil is filled in gap, two O-ring seals 17 match to form squeeze film resistance with sleeve 5 and bearing block 7
Buddhist nun's device 18 is provided with support plate 1 on bearing block 7, the butterfly spring seat 3 withstood on sleeve 5, butterfly bullet is provided in support plate 1
The external molded line at 3 top of spring abutment is fitted on sleeve 5, and butterfly spring 2, bearing are provided between support plate 1 and butterfly spring seat 3
The end face of sleeve 5 and bearing 8 in seat 7 is provided with bearing (ball) cover 14, and bearing (ball) cover 14 is fixed by head bolts 12, bearing
It is provided with gasket between end cap 14 and bearing block 7, thrust metal 13 is provided on bearing (ball) cover 14, is set on thrust metal 13
It is equipped with thrust bearing 11.
Since turbine rotor is larger, heavier-weight, used disk spring 2 has the characteristics that high rigidity, and butterfly bullet
Spring 2 is using multiple rows of common support butterfly spring seat 3 in parallel.Bearing block 7 uses split type structure, is convenient for component assembly and lubrication,
Junction is fixed using connection bolt 6.
It is sealed between bearing block 7 and axis 15 using black washer 10, oil leakage can be prevented, while guaranteeing thrust bearing 11
Axially position.
Bearing 8 is using oval pad bearing, dislocation pad bearing, four oil liquid bearings or tilting-pad bearing.
Referring to Fig. 3, Fig. 4 and Fig. 5, when bearing uses tilting-pad bearing, on sleeve 5 setting there are four and tilting-pad bearing
The spherical support 16 of 8 contacts, spherical support 16 are fixed on sleeve 5 by screw 4, and each spherical support 16 is respectively supported at
The middle part of the arc tile fragment outer surface of tilting-pad bearing 8.Other positions are identical as using the support construction of elliptic bush.
The squeeze film of damper need to cooperate resilient support using just there is remarkable result.Resilient support of the invention uses butterfly
Shape spring, spring is axially tapered and can bear higher load, has the characteristics that rigidity is big, buffering vibration absorption ability is strong.
Disk spring 2 provided by the invention has three big effects：First is that reducing support stiffness, effective damping is improved；Second is that allowing
Rotor center support, improves support performance；Third is that reducing critical speed.
The course of work of the invention is as follows：Since heavy rotor is when passing through critical speed, often vibrate it is larger, in order to drop
Low vibration amplitude forms certain thickness squeeze film by the sealing of O-ring seal 17 between sleeve 5 and bearing block 7, to increase
Add the damping of support system, a part of vibrational energy of absorption system, to reduce vibration amplitude.Here by taking dish-shaped bullet
Spring 2 supports, and to reduce the rigidity of system, makes disk spring seat 3 with rotor oscillation, further decreases rotor-support-foundation system and passing through
Vibration amplitude when critical speed.
Claims (9)
1. a kind of heavy type rotor vibration-repressing device, which is characterized in that including the bearing (8) being set on axis (15), bearing (8) housing
It equipped with sleeve (5), is provided with bearing block (7) outside sleeve (5), there is gap, sleeve (5) appearance between sleeve (5) and bearing block (7)
The both ends in face are provided with O-ring seal (17), are filled with lubricating oil in gap, two O-ring seals (17) and sleeve (5) and
Bearing block (7) matches to be formed squeeze film damper (18), is provided on bearing block (7) support plate (1), in support plate (1)
It is provided with the butterfly spring seat (3) withstood on sleeve (5), the arcuate structure at the top of butterfly spring seat (3) is fitted in sleeve (5)
On, butterfly spring (2) are provided between support plate (1) and butterfly spring seat (3).
2. a kind of heavy rotor vibration-repressing device according to claim 1, which is characterized in that bearing (8) uses tilting bush axis
When holding, several spherical supports (16) contacted with tilting-pad bearing are provided on sleeve (5).
3. a kind of heavy rotor vibration-repressing device according to claim 2, which is characterized in that spherical support (16) passes through screw
(4) it is fixed on sleeve (5).
4. a kind of heavy rotor vibration-repressing device according to claim 2, which is characterized in that each spherical support (16) is respectively
It is supported on the middle part of the arc tile fragment outer surface of tilting-pad bearing.
5. a kind of heavy rotor vibration-repressing device according to claim 1, which is characterized in that the sleeve (5) in bearing block (7)
It is provided with bearing (ball) cover (14) with the end face of bearing (8), thrust metal (13), thrust bearing is provided on bearing (ball) cover (14)
Thrust bearing (11) are provided on seat (13).
6. a kind of heavy rotor vibration-repressing device according to claim 1, which is characterized in that butterfly spring (2) is using multiple rows of
Common support butterfly spring seat (3) in parallel.
7. a kind of heavy rotor vibration-repressing device according to claim 1, which is characterized in that bearing block (7) uses dissection type
Structure, junction are fixed using connection bolt (6).
8. a kind of heavy rotor vibration-repressing device according to claim 1, which is characterized in that between bearing block (7) and axis (15)
It is sealed using black washer (10).
9. a kind of heavy rotor vibration-repressing device according to claim 1, which is characterized in that bearing (8) can also use ellipse
Circle pad bearing, dislocation pad bearing or four oil liquid bearings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810764919.6A CN108916306A (en) | 2018-07-12 | 2018-07-12 | A kind of heavy type rotor vibration-repressing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810764919.6A CN108916306A (en) | 2018-07-12 | 2018-07-12 | A kind of heavy type rotor vibration-repressing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108916306A true CN108916306A (en) | 2018-11-30 |
Family
ID=64411276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810764919.6A Pending CN108916306A (en) | 2018-07-12 | 2018-07-12 | A kind of heavy type rotor vibration-repressing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108916306A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113565863A (en) * | 2021-06-18 | 2021-10-29 | 湖南崇德科技股份有限公司 | Multi-thrust bearing |
| CN113950937A (en) * | 2021-09-24 | 2022-01-21 | 江苏大学 | Threshing cylinder vibration monitoring and reducing system and method and combine harvester |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5044781A (en) * | 1990-07-26 | 1991-09-03 | United Technologies Corporation | Spring supported damping system |
| CN1077257A (en) * | 1992-04-11 | 1993-10-13 | 西安交通大学 | Increase steady method of slight and the device thereof of pressing down |
| US5613781A (en) * | 1996-04-30 | 1997-03-25 | Dresser-Rand Company | Hanging spring supported squeeze film damping system for shaft bearing |
| US20060008188A1 (en) * | 2004-07-09 | 2006-01-12 | Nicholas John C | Disc spring centering device for squeeze film dampers |
-
2018
- 2018-07-12 CN CN201810764919.6A patent/CN108916306A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5044781A (en) * | 1990-07-26 | 1991-09-03 | United Technologies Corporation | Spring supported damping system |
| CN1077257A (en) * | 1992-04-11 | 1993-10-13 | 西安交通大学 | Increase steady method of slight and the device thereof of pressing down |
| US5613781A (en) * | 1996-04-30 | 1997-03-25 | Dresser-Rand Company | Hanging spring supported squeeze film damping system for shaft bearing |
| US20060008188A1 (en) * | 2004-07-09 | 2006-01-12 | Nicholas John C | Disc spring centering device for squeeze film dampers |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113565863A (en) * | 2021-06-18 | 2021-10-29 | 湖南崇德科技股份有限公司 | Multi-thrust bearing |
| CN113950937A (en) * | 2021-09-24 | 2022-01-21 | 江苏大学 | Threshing cylinder vibration monitoring and reducing system and method and combine harvester |
| CN113950937B (en) * | 2021-09-24 | 2023-08-18 | 江苏大学 | Threshing cylinder vibration monitoring and slowing system and method and combine harvester |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181130 |