CN109826866A - A kind of two-way spiral groove protection bearing arrangement - Google Patents
A kind of two-way spiral groove protection bearing arrangement Download PDFInfo
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- CN109826866A CN109826866A CN201910052348.8A CN201910052348A CN109826866A CN 109826866 A CN109826866 A CN 109826866A CN 201910052348 A CN201910052348 A CN 201910052348A CN 109826866 A CN109826866 A CN 109826866A
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- 239000007787 solid Substances 0.000 claims description 4
- 238000009423 ventilation Methods 0.000 claims description 2
- 239000000725 suspension Substances 0.000 abstract description 16
- 230000008093 supporting effect Effects 0.000 description 11
- 238000005096 rolling process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000012913 prioritisation Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007657 chevron notch test Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention discloses a kind of two-way spiral grooves to protect bearing arrangement, includes radial protection set and axial protection baffle；Radial protection set covers outside the rotor of required protection and rotor eccentricity setting；It is axial to protect an end face of baffle and rotor close but do not contact；Axial protection baffle is equipped with the thin and closed helicla flute in outer end opening inner end in several outer widths close to the end face of rotor, offers towards centre by both ends that several groove widths are identical and symmetrical helicla flute one by one on the inner wall of radial protection set respectively；Axial protection baffle, radial protection put on be equipped with lead on axial protection baffle, radial protection puts on the air flue of helicla flute.In rotor high speed rotation, it is capable of forming between radial protection set inner wall and rotor outer surface between radial dynamic pressure air film, axial protection baffle and rotor end-face close therewith and is capable of forming axial hydrodynamic air film.The present invention can reduce the burden of magnetic suspension bearing, and undertake protection bearing function in magnetic suspension bearing failure.
Description
Technical field
The present invention relates to high-speed rotating machine field more particularly to a kind of protection axis for magnetic-suspension high-speed rotating machinery
Bearing structure.
Background technique
Compressor, air blower, turbine drying machine, large-scale energy-saving water pump, highly effective energy-saving heat pump, accumulated energy flywheel, gas turbine,
The large high-speeds rotating machinery such as centrifugal Central air-conditioning unit, the extensive application in each department of national economy are related
The core key equipment and highly energy-consuming equipment of industry.
Magnetic suspension bearing is a kind of novel bearing that rotor is contiguously suspended without machinery using electromagnetic force.With tradition
Bearing (rolling bearing with cunning dynamic bearing) is compared, and magnetic suspension bearing and rotor are without Mechanical Contact, long service life, maintenance cost
It is low, it without lubrication and sealing, can be used for for a long time in the particular surroundings such as high/low temperature, it is considered to be the revolution of supporting technology is
The practical active supporting arrangement of currently the only investment.
When magnetic suspension bearing failure when, rotor fall magnetic suspension bearing and rotor can be caused it is badly damaged.Therefore, in magnetic
In suspension bearing rotor system, rolling bearing usually should be also set as protection bearing (note: the gas between rolling bearing and rotor
Gap is less than the air gap between magnetic suspension bearing and rotor), to undertake defencive function, rotor and the direct of magnetic suspension bearing is avoided to touch
It hits.But when system operates normally, this protection bearing cuts little ice.
Gas bearing is using air film support loading or to reduce the mechanical component to rub.With traditional bearing (rolling bearing and
Cunning dynamic bearing) it compares, gas bearing has that speed is high, precision is high, frictional dissipation is small, high-low temperature resistant and atomic radiation, nothing
Pollution, the features such as service life is long.Gas bearing is divided into hydrodynamic gas-lubricated bearing and hydrostatic gas-lubricated bearing.Hydrodynamic gas-lubricated bearing does not need outer
Aerating source, only fluid dynamic effect under generate supporting effect, have the advantages that structure is simple, but to manufacture processing request compared with
Height, and the stage is being started and stopped, exist with rotor and directly contacts friction.
Helicla flute or chevron-notch (hereinafter referred to as helicla flute) hydrodynamic gas-lubricated bearing are to pass through helicoidal pump using helical groove structure
Effect is sent, the bearing of supporting effect is generated.Helicla flute hydrodynamic gas-lubricated bearing is with its bearing capacity big (especially at high speeds), power consumption
Low, the features such as high stability is good, it is far superior to other kinds of hydrodynamic gas-lubricated bearing, practical middle column occupy the umber one.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of two-way spiral shell for defect involved in background technique
Spin slot protects bearing arrangement.
The present invention uses following technical scheme to solve above-mentioned technical problem:
A kind of two-way spiral groove protection bearing protects baffle with axial comprising radial protection set；
The radial protection set is the hollow circular-tube of both ends open, and enabling its both ends is respectively the end A, the end B；The axial protection baffle
Cylindrical, enabling its both sides of the face is respectively end face C, end face D；
The axial protection baffle center is equipped with circular through hole, and the outer edge of end face C is equipped with bulge loop；The inner wall shape of the bulge loop
At the positioning spigot for being matched with the radial protection set end A；End face C is uniformly provided with N between bulge loop and circular through hole
A arc-shaped slot pass, N number of arc-shaped slot pass are located on the same round E, circle E and bulge loop, circular through hole it is coaxial, N be greater than
Integer equal to 2；
The axial protection baffle end face C is equipped with air-guide disk between circle E and circular through hole；The air-guide disk is in annulus column,
One end face and the end face C are coaxially connected, are uniformly provided with the identical helicla flute of several rotation directions, helicla flute on another end face
Width be tapered from outside to inside, and helicla flute it is opening-like at air-guide disk outer wall, at air-guide disk inner wall be in silent shape；
After the end face of radial protection set side is positioned by the positioning spigot and the end face C of the axial protection baffle is solid
Even；
N number of outer vent for leading to bulge loop inner wall by bulge loop outer wall is uniformly provided on the bulge loop, the radial protection is covered in its A
End is equipped with N number of interior venthole for leading to radial protection set inner wall by radial protection set outer wall；It is N number of outer vent, N number of interior logical
The width of stomata is a, corresponds the air guide channel for forming that helicla flute exterior side port is connected on N number of and air-guide disk；
N number of outer vent makes bulge loop form N number of arc section, and N number of arc section and N number of arc-shaped slot pass one are a pair of
It answers, and the radially symmetrical center line of arc section and its radially symmetrical center line for corresponding to arc-shaped slot pass are overlapped；Adjacent circle
The width in gap is b between arc-shaped slot, and b is less than a, so that air guide channel arc-shaped slot pass phase corresponding with its two sides arc section
Connection；
Offer towards centre by the both ends A, B that several groove widths are identical and symmetrical spiral shell one by one on the inner wall of radial protection set respectively
Spin slot；
The radial protection set cover outside the rotor of required protection and rotor eccentricity setting, and radial protection set inner wall at the top of and
The distance of rotor top is greater than the distance of radial protection set inner wall bottom and rotor bottom；The end face C of the axial protection baffle
It is close with an end face of rotor but do not contact, so that the gap between N number of arc-shaped slot pass and radial protection set, rotor is connected
It is logical；
In rotor high speed rotation, be capable of forming between radial protection set inner wall and rotor outer surface radial dynamic pressure air film,
Axial hydrodynamic air film is capable of forming between axial protection baffle and rotor end-face close therewith.
The further prioritization scheme of bearing, N=4 are protected as a kind of two-way spiral groove of the present invention.
The further prioritization scheme of bearing, the outer vent, interior ventilation are protected as a kind of two-way spiral groove of the present invention
The height in hole is equal with the height of the bulge loop.
The invention adopts the above technical scheme compared with prior art, has following technical effect that
First, when system operates normally, the radial dynamic pressure air film can generate supporting force vertically upward and and radial direction
The common supporting rotor of magnetic suspension bearing；
Second, cause rotor radially to fall moment in radial magnetic bearing failure, the radial dynamic pressure air film radially falls
It falls direction to be compressed into minimum and generate much larger than the supporting force (radially falling opposite direction) when operating normally, can effectively subtract
Light rotor destroys caused by radially directly hitting；
Third, when system operates normally, the axial hydrodynamic air film, which can generate to be directed toward by two-way spiral groove protection bearing, to be turned
The folk prescription of sub- end face in the axial direction supporting force and with the common supporting rotor of axial magnetic suspension bearing；
4th, it causes rotor edge axial in axial magnetic suspension bearing failure and falls wink towards two-way spiral groove protection bearing direction
Between, the axial hydrodynamic air film falls direction along axial direction and is compressed into minimum and generation much larger than supporting force when operating normally
(falling opposite direction along axial direction) can effectively mitigate rotor edge axially and directly hit towards two-way spiral groove protection bearing direction
Caused by destroy.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the two-way spiral groove protection bearing in the present invention；
Fig. 2 (1), Fig. 2 (2), Fig. 2 (3) are respectively the main view, cross-sectional view, 3 dimensional drawing that baffle is axially protected in the present invention；
Fig. 3 (1), Fig. 3 (2), Fig. 3 (3) are respectively right view, the main view, 3 dimensional drawing of radial protection set of the present invention；
Fig. 4 is the inner wall deployed configuration schematic diagram of the radial protection set in the present invention；
Fig. 5 is the schematic diagram that the radial protection set in the present invention is matched with rotor.
In figure, 1- rotor, 2- radial protection set, the axial protection baffle of 3-, the inner wall of 4- radial protection set, 5- rotor it is outer
Wall.
Specific embodiment
Technical solution of the present invention is described in further detail with reference to the accompanying drawing:
The present invention can be embodied in many different forms, and should not be assumed that be limited to the embodiments described herein.On the contrary, providing
These embodiments are thoroughly and complete to make the disclosure, and will give full expression to the scope of the present invention to those skilled in the art.
In the accompanying drawings, for the sake of clarity it is exaggerated component.
As shown in Figure 1, the invention discloses a kind of two-way spiral grooves to protect bearing, include radial protection set and axial protection
Baffle；
The radial protection set is the hollow circular-tube of both ends open, and enabling its both ends is respectively the end A, the end B；The axial protection baffle
Cylindrical, enabling its both sides of the face is respectively end face C, end face D.
As shown in Figure 1 and Figure 2, the axial protection baffle center is equipped with circular through hole, and the outer edge of end face C is equipped with convex
Ring；The inner wall of the bulge loop forms the positioning spigot for matching with the radial protection set end A；End face C is in bulge loop and circle
Four arc-shaped slot pass are uniformly provided between shape through-hole, four arc-shaped slot pass are located on the same round E, circle E and bulge loop,
Circular through hole is coaxial, and four be the integer more than or equal to 2；
The axial protection baffle end face C is equipped with air-guide disk between circle E and circular through hole；The air-guide disk is in annulus column,
One end face and the end face C are coaxially connected, are uniformly provided with the identical helicla flute of several rotation directions, helicla flute on another end face
Width be tapered from outside to inside, and helicla flute it is opening-like at air-guide disk outer wall, at air-guide disk inner wall be in silent shape；
After the end face of radial protection set side is positioned by the positioning spigot and the end face C of the axial protection baffle is solid
Even.
As shown in Figure 2 and Figure 3, four outer vents for leading to bulge loop inner wall by bulge loop outer wall are uniformly provided on the bulge loop,
The radial protection covers the interior venthole there are four set at its end A by radial protection set outer wall towards radial protection set inner wall；Institute
State four outer vents, the width of four interior ventholes is a, helicla flute outboard end in one-to-one correspondence formation four and air-guide disk
The air guide channel that mouth is connected；The outer vent, interior venthole the equal and described bulge loop of height height it is equal, be c.
Four outer vents make bulge loop form four arc sections, four arc sections and four arc-shaped slot pass
It corresponds, and the radially symmetrical center line of arc section and its radially symmetrical center line for corresponding to arc-shaped slot pass are overlapped；
The width in gap is b between adjacent circular arc shape through slot, and b is less than a, so that air guide channel and its two sides arc section are corresponding arc-shaped
Through slot is connected.
As shown in figure 4, it is identical by the both ends A, B towards centre to offer several groove widths respectively on the inner wall of radial protection set
And symmetrical helicla flute one by one.
As shown in figure 5, the radial protection set covers outside the rotor of required protection and rotor eccentricity setting, and radial guarantor
At the top of jacket inner wall and the distance of rotor top is greater than the distance of radial protection set inner wall bottom and rotor bottom；The axial guarantor
The end face C of guard and an end face of rotor are close but do not contact.Between four arc-shaped slot pass and radial protection set, rotor
Gap be connected, as shown in Figure 1.
The axial protection baffle is connected by the spill positioning spigot with end face screw, solid with radial protection set
It is scheduled on together；On two orthogonal rectangular channels on the outer table top of the spill positioning spigot, with radial protection set end face
Two orthogonal rectangular channels width direction be aligned；The end of rotor is arranged in the two-way spiral groove protection bearing,
And it fixes on the base；The radial protection set covers outside rotor and rotor eccentricity setting, and at the top of radial protection set inner wall
It is greater than the distance of radial protection set inner wall bottom and rotor bottom with the distance of rotor top, and the axial direction protects baffle
The end face of the end face and rotor that are in contact with radial protection set is close, but does not contact.
Between radial protection set inner wall and rotor outer surface, axial protection baffle and rotor end-face close therewith it
Between can be respectively formed radial dynamic pressure air film and axial hydrodynamic air film in rotor high speed rotation.The radial dynamic pressure air film and axis
Magnetic suspension bearing can be mitigated respectively with radial magnetic bearing and the common supporting rotor of axial magnetic suspension bearing to dynamic pressure air film
Burden, and magnetic suspension bearing failure when, can undertake protection bearing function.
Those skilled in the art can understand that unless otherwise defined, all terms used herein (including skill
Art term and scientific term) there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Also
It should be understood that those terms such as defined in the general dictionary should be understood that have in the context of the prior art
The consistent meaning of meaning will not be explained in an idealized or overly formal meaning and unless defined as here.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not limited to this hair the foregoing is merely a specific embodiment of the invention
Bright, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection scope within.
Claims (3)
1. a kind of two-way spiral groove protects bearing, which is characterized in that include radial protection set and axial protection baffle；
The radial protection set is the hollow circular-tube of both ends open, and enabling its both ends is respectively the end A, the end B；The axial protection baffle
Cylindrical, enabling its both sides of the face is respectively end face C, end face D；
The axial protection baffle center is equipped with circular through hole, and the outer edge of end face C is equipped with bulge loop；The inner wall shape of the bulge loop
At the positioning spigot for being matched with the radial protection set end A；End face C is uniformly provided with N between bulge loop and circular through hole
A arc-shaped slot pass, N number of arc-shaped slot pass are located on the same round E, circle E and bulge loop, circular through hole it is coaxial, N be greater than
Integer equal to 2；
The axial protection baffle end face C is equipped with air-guide disk between circle E and circular through hole；The air-guide disk is in annulus column,
One end face and the end face C are coaxially connected, are uniformly provided with the identical helicla flute of several rotation directions, helicla flute on another end face
Width be tapered from outside to inside, and helicla flute it is opening-like at air-guide disk outer wall, at air-guide disk inner wall be in silent shape；
After the end face of radial protection set side is positioned by the positioning spigot and the end face C of the axial protection baffle is solid
Even；
N number of outer vent for leading to bulge loop inner wall by bulge loop outer wall is uniformly provided on the bulge loop, the radial protection is covered in its A
End is equipped with N number of interior venthole for leading to radial protection set inner wall by radial protection set outer wall；It is N number of outer vent, N number of interior logical
The width of stomata is a, corresponds the air guide channel for forming that helicla flute exterior side port is connected on N number of and air-guide disk；
N number of outer vent makes bulge loop form N number of arc section, and N number of arc section and N number of arc-shaped slot pass one are a pair of
It answers, and the radially symmetrical center line of arc section and its radially symmetrical center line for corresponding to arc-shaped slot pass are overlapped；Adjacent circle
The width in gap is b between arc-shaped slot, and b is less than a, so that air guide channel arc-shaped slot pass phase corresponding with its two sides arc section
Connection；
Offer towards centre by the both ends A, B that several groove widths are identical and symmetrical spiral shell one by one on the inner wall of radial protection set respectively
Spin slot；
The radial protection set cover outside the rotor of required protection and rotor eccentricity setting, and radial protection set inner wall at the top of and
The distance of rotor top is greater than the distance of radial protection set inner wall bottom and rotor bottom；The end face C of the axial protection baffle
It is close with an end face of rotor but do not contact, so that the gap between N number of arc-shaped slot pass and radial protection set, rotor is connected
It is logical；
In rotor high speed rotation, be capable of forming between radial protection set inner wall and rotor outer surface radial dynamic pressure air film,
Axial hydrodynamic air film is capable of forming between axial protection baffle and rotor end-face close therewith.
2. two-way spiral groove according to claim 1 protects bearing, it is further characterized in that, N=4.
3. two-way spiral groove according to claim 1 protects bearing, it is further characterized in that, the outer vent, interior ventilation
The height in hole is equal with the height of the bulge loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910052348.8A CN109826866B (en) | 2019-01-21 | 2019-01-21 | Bidirectional spiral groove protection bearing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910052348.8A CN109826866B (en) | 2019-01-21 | 2019-01-21 | Bidirectional spiral groove protection bearing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109826866A true CN109826866A (en) | 2019-05-31 |
| CN109826866B CN109826866B (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910052348.8A Active CN109826866B (en) | 2019-01-21 | 2019-01-21 | Bidirectional spiral groove protection bearing structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503147A (en) * | 2020-04-01 | 2020-08-07 | 江苏理工学院 | Conical surface clamping protection bearing device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5652623A (en) * | 1979-10-08 | 1981-05-11 | Nippon Seiko Kk | Composite bearing utilizing magnetic force and dynamic pressure in combination |
| JPS5663118A (en) * | 1979-10-25 | 1981-05-29 | Toshiba Corp | Thrust static pressure gas bearing device |
| EP0109715A1 (en) * | 1982-11-19 | 1984-05-30 | Koninklijke Philips Electronics N.V. | Air bearing |
| CN1719054A (en) * | 2005-02-17 | 2006-01-11 | 哈尔滨工业大学 | No swirling flow dynamic pressure air float cylindrical bearing |
| CN201535319U (en) * | 2009-10-09 | 2010-07-28 | 大连理工大学 | Inner pion-shaped air wedge slot dynamic and static pressure composite air bearing |
| CN103527631A (en) * | 2012-07-04 | 2014-01-22 | 三星电机株式会社 | Hydrodynamic bearing assembly and spindle motor having the same |
| CN106438702A (en) * | 2016-11-22 | 2017-02-22 | 江苏工大金凯高端装备制造有限公司 | Aerostatic air-floating bearing |
-
2019
- 2019-01-21 CN CN201910052348.8A patent/CN109826866B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5652623A (en) * | 1979-10-08 | 1981-05-11 | Nippon Seiko Kk | Composite bearing utilizing magnetic force and dynamic pressure in combination |
| JPS5663118A (en) * | 1979-10-25 | 1981-05-29 | Toshiba Corp | Thrust static pressure gas bearing device |
| EP0109715A1 (en) * | 1982-11-19 | 1984-05-30 | Koninklijke Philips Electronics N.V. | Air bearing |
| CN1719054A (en) * | 2005-02-17 | 2006-01-11 | 哈尔滨工业大学 | No swirling flow dynamic pressure air float cylindrical bearing |
| CN201535319U (en) * | 2009-10-09 | 2010-07-28 | 大连理工大学 | Inner pion-shaped air wedge slot dynamic and static pressure composite air bearing |
| CN103527631A (en) * | 2012-07-04 | 2014-01-22 | 三星电机株式会社 | Hydrodynamic bearing assembly and spindle motor having the same |
| CN106438702A (en) * | 2016-11-22 | 2017-02-22 | 江苏工大金凯高端装备制造有限公司 | Aerostatic air-floating bearing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111503147A (en) * | 2020-04-01 | 2020-08-07 | 江苏理工学院 | Conical surface clamping protection bearing device |
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| CN109826866B (en) | 2020-04-24 |
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Effective date of registration: 20210226 Address after: 250200 Taiping Industrial Park, Xiuhui street, Zhangqiu District, Jinan City, Shandong Province Patentee after: SHANDONG HUADONG FAN Co.,Ltd. Address before: No. 29, Qinhuai District, Qinhuai District, Nanjing, Jiangsu Patentee before: Nanjing University of Aeronautics and Astronautics |