CN209278336U - A kind of radial and axial protection structure of magnetic suspension bearing - Google Patents
A kind of radial and axial protection structure of magnetic suspension bearing Download PDFInfo
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- CN209278336U CN209278336U CN201821806978.7U CN201821806978U CN209278336U CN 209278336 U CN209278336 U CN 209278336U CN 201821806978 U CN201821806978 U CN 201821806978U CN 209278336 U CN209278336 U CN 209278336U
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- radial
- silicon carbide
- carbide ceramics
- axial
- magnetic suspension
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Abstract
The utility model discloses a kind of radial and axial protection structures of magnetic suspension bearing, include rolling bearing pedestal, two rolling bearings, two silicon carbide ceramics axle sleeves, two axial protection baffles and radial protection ring；Two rolling bearings are arranged side by side, and outer ring is connected with rolling bearing pedestal, and inner ring is connected with the outer wall of two silicon carbide ceramics axle sleeves respectively；Two axial protection baffles, radial protection rings are each attached on main shaft, form the groove for accommodating two silicon carbide ceramics axle sleeves；Two silicon carbide ceramics axle sleeves are arranged in groove and spindle eccentricity setting, and two silicon carbide ceramics axle sleeves are all uniformly provided with several helicla flutes in its positioning shaft shoulder and inner wall.The utility model can be generated when operating normally radial and axial supporting force and with the common supporting rotor of magnetic suspension bearing, cause rotor radially in magnetic suspension bearing failure or axial fall moment and can effectively mitigate destruction caused by rotor is directly hit.
Description
Technical field
The utility model relates to high-speed rotating machine field more particularly to a kind of radial and axial protection knots of magnetic suspension 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.But magnetic suspension bearing distinct disadvantage is smaller than bearing capacity.It changes
Yan Zhi, under same bearing capacity, the volume and weight of magnetic suspension bearing is larger, and rotor weight and size increase, system is caused to move
State property can decline.
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, avoid the collision of rotor and magnetic suspension bearing.
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.
Gas bearing common used material has titanium alloy and bearing steel, and common processing method has chemical attack processing method, profiling
The micron order processing of filing, ion sputtering processing method, milling method, abrasive flow machining, high-speed milling.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of magnetic for defect involved in background technique
The radial and axial protection structure of suspension bearing.
The utility model uses following technical scheme to solve above-mentioned technical problem:
A kind of radial and axial protection structure of magnetic suspension bearing, the magnetic suspension bearing include magnetic suspension bearing seat, radial direction
Magnetic suspension shaft bearing assembly and axial magnetic suspension bearing component, wherein radial magnetic bearing component includes to be fixed on main shaft
Rotor and the stator outside rotor is covered, the rotor, stator, main shaft be coaxial and the distance between rotor outer wall and stator inner wall
For D；
The radial and axial protection structure include rolling bearing pedestal, two rolling bearings, two silicon carbide ceramics axle sleeves,
Two axial protection baffles and a radial protection ring；
Described two rolling bearings are arranged side by side, and outer ring is connected with the rolling bearing pedestal；The rolling bearing pedestal
It is connected with the magnetic suspension bearing seat；
The outer wall of described two silicon carbide ceramics axle sleeves and the inner ring of described two rolling bearings correspond interference fit,
And each silicon carbide ceramics axle sleeve is equipped with positioning shaft shoulder, apart from another farther away one end of silicon carbide ceramics axle sleeve to limit it
It is axially mobile relative to corresponding rolling bearing；
Described two axial protection baffles, radial protection ring are each attached on main shaft, wherein radial protection ring is arranged two
Between a axial protection baffle, and the both ends of radial protection ring are connected with two axial protection baffles respectively, are formed for accommodating
The groove of described two silicon carbide ceramics axle sleeves；
Described two silicon carbide ceramics axle sleeves are respectively provided with to be arranged with the spindle eccentricity in the groove, and silicon carbide
Distance at the top of Ceramic shaft sleeve inner wall and at the top of radial protection ring outer wall is greater than silicon carbide ceramics sleeve lining bottom and radial direction is protected
The distance of retaining ring outer wall bottom, the inner wall radius of silicon carbide ceramics axle sleeve and the difference of radial protection ring exterior radius are less than D；
Described two silicon carbide ceramics axle sleeves are all uniformly provided with several groove widths on the inner wall of one end for being equipped with positioning shaft shoulder
The outer rim of identical helicla flute, two silicon carbide ceramics axle sleeve positioning shaft shoulders close to the end face of the groove is all uniformly provided with several
The helicla flute that groove width is tapered from outside to inside；
In main shaft high speed rotation, radial dynamic pressure gas is generated between described two silicon carbide ceramics axle sleeves and radial protection ring
Film generates axial hydrodynamic air film between described two silicon carbide ceramics axle sleeves and two axial protection baffles.
As a kind of radial and axial further prioritization scheme of protection structure of magnetic suspension bearing of the utility model, the carbon
SiClx Ceramic shaft sleeve system passes through cold isostatic pressing method straight forming.
As a kind of radial and axial further prioritization scheme of protection structure of magnetic suspension bearing of the utility model, the carbon
The difference of the radius of the inner wall radius and radial protection ring outer wall of SiClx Ceramic shaft sleeve is D/2.
The utility model compared with the prior art by using the above technical solution, has following technical effect that
First, system operate normally when, the radial dynamic pressure air film of generation can generate supporting force vertically upward and
With the common supporting rotor of radial magnetic bearing component；
Second, cause rotor radially to fall moment, the radial dynamic pressure gas of generation in radial magnetic bearing component failures
Film radially falls direction and is compressed into minimum and generates much larger than the supporting force (radially falling opposite direction) when operating normally,
Destruction caused by rotor is radially directly hit can effectively be mitigated；
Third, when system operates normally, the axial hydrodynamic air film of generation can generate axial supporting force and and axial direction
The common supporting rotor of magnetic suspension shaft bearing assembly；
4th, cause rotor to fall moment, the axial hydrodynamic gas of generation along axial direction in axial magnetic suspension bearing component failures
Film falls direction along axial direction and is compressed into supporting force (along axial direction fall opposite direction) of the minimum and generation much larger than normal operation when,
Destruction caused by the axial directly shock in rotor edge can effectively be mitigated；
5th, due to using isostatic cool pressing straight forming technique, traditional helicla flute hydrodynamic gas-lubricated bearing is avoided to system
Make the higher disadvantage of processing request；
6th, the utility model has radial and axial protective effect more stronger than rolling bearing.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that the utility model cooperates magnetic suspension bearing；
Fig. 2 is the structural schematic diagram of radial and axial protection structure in the utility model；
Fig. 3 is the schematic diagram that silicon carbide ceramics axle sleeve and radial protection ring match in the utility model；
Fig. 4 is the structural schematic diagram of silicon carbide ceramics axle sleeve in the utility model.
In figure, 1- main shaft, 2- radial magnetic bearing component, 3- axial magnetic suspension bearing component, the radial and axial guarantor of 4-
Protection structure, 5- radial protection ring, axially protection baffle, 7- rolling bearing, 8- rolling bearing pedestal, 9- positioning shaft shoulder, 10-'s 6- are carbonized
The inner wall of silicon Ceramic shaft sleeve, the outer wall of 11- radial protection ring.
Specific embodiment
The technical solution of the utility model is described in further detail with reference to the accompanying drawing:
The utility model can be embodied in many different forms, and should not be assumed that be limited to the embodiments described herein.
On the contrary, it is thorough and complete to these embodiments are provided so that the disclosure, and this reality will be given full expression to those skilled in the art
With novel range.In the accompanying drawings, for the sake of clarity it is exaggerated component.
As shown in Figure 1, the utility model discloses a kind of radial and axial protection structure of magnetic suspension bearing, the magnetic suspension
Bearing includes magnetic suspension bearing seat, radial magnetic bearing component and axial magnetic suspension bearing component, wherein axial magnetic axis
Bearing assembly includes the rotor that is fixed on main shaft and covers the stator outside rotor, and the rotor, stator, main shaft be coaxial and rotor
The distance between outer wall and stator inner wall are D.
As shown in Fig. 2, the radial and axial protection structure includes rolling bearing pedestal, two rolling bearings, two carbonizations
Silicon Ceramic shaft sleeve, two axial protection baffles and a radial protection ring；
Described two rolling bearings are arranged side by side, and outer ring is connected with the rolling bearing pedestal；The rolling bearing pedestal
It is connected with the magnetic suspension bearing seat；
The outer wall of described two silicon carbide ceramics axle sleeves and the inner ring of described two rolling bearings correspond interference fit,
And each silicon carbide ceramics axle sleeve is equipped with positioning shaft shoulder, apart from another farther away one end of silicon carbide ceramics axle sleeve to limit it
It is axially mobile relative to corresponding rolling bearing；
Described two axial protection baffles, radial protection ring are each attached on main shaft, wherein radial protection ring is arranged two
Between a axial protection baffle, and the both ends of radial protection ring are connected with two axial protection baffles respectively, are formed for accommodating
The groove of described two silicon carbide ceramics axle sleeves.
In the embodiment that Fig. 2 is provided, one of axial protection baffle and radial protection ring pass through interference fit and main shaft
It is connected, axially protection baffle is connected by screw attachment and main shaft for another.
As shown in figure 3, described two silicon carbide ceramics axle sleeves are respectively provided with and set in the groove with the spindle eccentricity
It sets, and the distance at the top of silicon carbide ceramics sleeve lining and at the top of radial protection ring outer wall is greater than silicon carbide ceramics sleeve lining bottom
The distance in portion and radial protection ring outer wall bottom, the inner wall radius of silicon carbide ceramics axle sleeve and the difference of radial protection ring exterior radius
For D/2.
As shown in figure 4, described two silicon carbide ceramics axle sleeves are all uniformly set on the inner wall of one end for being equipped with positioning shaft shoulder
There is the outer rim of the identical helicla flute of several groove widths, two silicon carbide ceramics axle sleeve positioning shaft shoulders close to the end face of the groove all equal
The even helicla flute being tapered from outside to inside equipped with several groove widths.
Silicon carbide ceramics axle sleeve system passes through cold isostatic pressing method straight forming.
Since twentieth century, the ratio of combined technological achievement is significantly risen, and new technology is often already present several sections
The combination for learning principle is a kind of trend of up-to-date technology development.
In main shaft high speed rotation, radial dynamic pressure gas is generated between described two silicon carbide ceramics axle sleeves and radial protection ring
Film generates axial hydrodynamic air film between described two silicon carbide ceramics axle sleeves and two axial protection baffles.
When system operates normally, the radial dynamic pressure air film and axial hydrodynamic air film of generation provide respectively additional radial direction and
Axial supporting force, with radial magnetic bearing component and the common supporting rotor of axial magnetic suspension bearing component.In axial magnetic
Bearing assembly or axial magnetic suspension bearing component failures cause rotor radially or it is axial fall moment, the radial dynamic pressure air film or
Axial hydrodynamic air film is radially or axial direction of falling is compressed into minimum and generates much larger than supporting force (edge when operating normally
Axially or radially fall opposite direction), can effectively mitigate rotor radially or it is axial directly hit caused by destruction.Therefore this is practical
It is novel that there is radial and axial protective effect more stronger than rolling bearing.
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 the utility model fields
Justice.It should also be understood that those terms such as defined in the general dictionary should be understood that with upper with the prior art
The consistent meaning of meaning hereinafter, and unless defined as here, will not with idealization or meaning too formal come
It explains.
Above-described specific embodiment, to the purpose of this utility model, technical scheme and beneficial effects carried out into
One step is described in detail, it should be understood that being not used to limit the foregoing is merely specific embodiment of the present utility model
The utility model processed, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done,
It should be included within the scope of protection of this utility model.
Claims (3)
1. a kind of radial and axial protection structure of magnetic suspension bearing, the magnetic suspension bearing includes magnetic suspension bearing seat, radial magnetic
Suspension bearing component and axial magnetic suspension bearing component, wherein radial magnetic bearing component includes turn being fixed on main shaft
Son and cover the stator outside rotor, the rotor, stator, main shaft are coaxial and the distance between rotor outer wall and stator inner wall are
D, it is characterised in that:
The radial and axial protection structure includes rolling bearing pedestal, two rolling bearings, two silicon carbide ceramics axle sleeves, two
Axial protection baffle and a radial protection ring；
Described two rolling bearings are arranged side by side, and outer ring is connected with the rolling bearing pedestal；The rolling bearing pedestal and institute
Magnetic suspension bearing seat is stated to be connected；
The outer wall of described two silicon carbide ceramics axle sleeves and the inner ring of described two rolling bearings correspond interference fit, and every
A silicon carbide ceramics axle sleeve is equipped with positioning shaft shoulder apart from another farther away one end of silicon carbide ceramics axle sleeve, to limit it relatively
Corresponding rolling bearing is axially mobile；
Described two axial protection baffles, radial protection ring are each attached on main shaft, wherein radial protection ring is arranged in two axis
To between protection baffle, and the both ends of radial protection ring are connected with two axial protection baffles respectively, are formed described for accommodating
The groove of two silicon carbide ceramics axle sleeves；
Described two silicon carbide ceramics axle sleeves are respectively provided with to be arranged with the spindle eccentricity in the groove, and silicon carbide ceramics
Distance at the top of sleeve lining and at the top of radial protection ring outer wall is greater than silicon carbide ceramics sleeve lining bottom and radial protection ring
The distance of outer wall bottom, the inner wall radius of silicon carbide ceramics axle sleeve and the difference of radial protection ring exterior radius are less than D；
It is identical that described two silicon carbide ceramics axle sleeves are all uniformly provided with several groove widths on the inner wall of one end for being equipped with positioning shaft shoulder
Outer rim close to the end face of the groove of helicla flute, two silicon carbide ceramics axle sleeve positioning shaft shoulders be all uniformly provided with several groove widths
The helicla flute being tapered from outside to inside；
In main shaft high speed rotation, radial dynamic pressure air film is generated between described two silicon carbide ceramics axle sleeves and radial protection ring,
Axial hydrodynamic air film is generated between described two silicon carbide ceramics axle sleeves and two axial protection baffles.
2. the radial and axial protection structure of magnetic suspension bearing according to claim 1, which is characterized in that the silicon carbide pottery
Porcelain axle sleeve system passes through cold isostatic pressing method straight forming.
3. the radial and axial protection structure of magnetic suspension bearing according to claim 1, which is characterized in that the silicon carbide pottery
The difference of the radius of the inner wall radius and radial protection ring outer wall of porcelain axle sleeve is D/2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821806978.7U CN209278336U (en) | 2018-11-05 | 2018-11-05 | A kind of radial and axial protection structure of magnetic suspension bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821806978.7U CN209278336U (en) | 2018-11-05 | 2018-11-05 | A kind of radial and axial protection structure of magnetic suspension bearing |
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| Publication Number | Publication Date |
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| CN209278336U true CN209278336U (en) | 2019-08-20 |
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| CN201821806978.7U Active CN209278336U (en) | 2018-11-05 | 2018-11-05 | A kind of radial and axial protection structure of magnetic suspension bearing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109322917A (en) * | 2018-11-05 | 2019-02-12 | 南京航空航天大学 | A kind of radial and axial protection structure of magnetic suspension bearing |
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2018
- 2018-11-05 CN CN201821806978.7U patent/CN209278336U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109322917A (en) * | 2018-11-05 | 2019-02-12 | 南京航空航天大学 | A kind of radial and axial protection structure of magnetic suspension bearing |
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