CN107100932A - Axial magnetic suspension bearing, magnetic suspension system and compressor - Google Patents
Axial magnetic suspension bearing, magnetic suspension system and compressor Download PDFInfo
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- CN107100932A CN107100932A CN201710438261.5A CN201710438261A CN107100932A CN 107100932 A CN107100932 A CN 107100932A CN 201710438261 A CN201710438261 A CN 201710438261A CN 107100932 A CN107100932 A CN 107100932A
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- China
- Prior art keywords
- bearing
- protection
- magnetic suspension
- iron core
- axial magnetic
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Classifications
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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
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
Abstract
The present invention is that, on a kind of axial magnetic suspension bearing, magnetic suspension system and compressor, main purpose is that the defect of axially protection can only be provided magnetic suspension system by solving existing axial magnetic suspension bearing.The technical scheme mainly used for：Axial magnetic suspension bearing, including stator, rotor and the first protection structure；First protection structure includes the first stopper section and the second stopper section；First stopper section is arranged on stator, and the second stopper section is arranged on rotor；Both first stopper section and the second stopper section are relative on axially and radially, and both have for providing axially the first gap of protection to axial magnetic suspension bearing and diametrically having the second gap for providing the part being set in rotating shaft radially protection in the axial direction.Wherein, axially protection can be both provided magnetic suspension system by the first gap and the second gap of setting, radial direction can also be provided and protected, the extra space for setting and radially protecting can also be saved, design margin is improved.
Description
Technical field
The present invention relates to magnetic levitation technology field, more particularly to a kind of axial magnetic suspension bearing, magnetic suspension system and pressure
Contracting machine.
Background technology
General, existing axial magnetic suspension bearing protection structure form is as shown in figure 1, including front axle to iron core 1 ', front axle
To bearing control coil 2 ', preceding protection bearing 3 ', thrust disc 4 ', rear protection bearing 5 ', rear axial bearing control coil 6 ', rear axle
To bearing iron core 7 ', optical axis 8 '.The right side of protection bearing 3 ' and thrust disc before axial magnetic suspension bearing protection device is mainly
4 ' left side, the right side of thrust disc 4 ' and the left side of rear protection bearing 5 ' form spacing gap, preceding cod iron core
1 ', the working clearance of axial magnetic suspension bearing is formed between thrust disc 4 ', the rear three of cod iron core 7 ', wherein, spacing
Gap is less than the working clearance.When thrust disc rotary work, the left side of thrust disc 4 ' and the right side of preceding protection bearing 3 ' occur
CONTACT WITH FRICTION occurs for CONTACT WITH FRICTION, the right side of thrust disc 4 ' and the left side of rear protection bearing 5 ', so as to play protection front axle
To iron core 1 ' and rear cod iron core 7 ', it is allowed to not occur to rub and ablation, damage with thrust disc 4 '.The axial magnetic suspension axle
Protection structure of accepting insurance can only provide axial protection, and extra setting radially protection knot is also needed to realize that the radial direction of magnetic suspension system is protected
Structure.However, general by the axial protection structure of magnetic suspension system and radial direction protection structure is spaced apart is arranged in the prior art
On optical axis 8 ', the design space demand so to magnetic suspension system is higher, adds magnetic suspension system global design difficulty.
The content of the invention
In view of this, the present invention provides a kind of axial magnetic suspension bearing, magnetic suspension system and compressor, and main purpose is
The defect of axially protection can only be provided magnetic suspension system by solving existing axial magnetic suspension bearing.
To reach above-mentioned purpose, present invention generally provides following technical scheme：
Embodiments of the invention provide a kind of axial magnetic suspension bearing, for being used cooperatively with rotating shaft, the axial magnetcisuspension
Floating axle, which is contracted, includes stator, rotor and the first protection structure；First protection structure includes the first stopper section and the second stopper section；
First stopper section is arranged on the stator, and second stopper section is arranged on the rotor；Described
Having between one stopper section and second stopper section on the axial direction is used to provide axially the axial magnetic suspension bearing
First gap H1 of protection and it is described radially have to be used to provide the part that is set in the rotating shaft radially protect
The second gap H2.
The object of the invention to solve the technical problems can be also applied to the following technical measures to achieve further.
In foregoing axial magnetic suspension bearing, optionally, the rotor includes thrust disc, and the stator includes bearing iron
Core, the quantity of the bearing iron core is two and is distributed in the both sides of the thrust disc；
Wherein, the first described protection structure is provided between the thrust disc and at least one described bearing iron core.
In foregoing axial magnetic suspension bearing, optionally, first stopper section includes the first protection bearing, described the
One protection bearing is regularly set in the axis hole of a bearing iron core；
Second stopper section includes hierarchic structure, and the hierarchic structure is arranged on the first side of the thrust disc, described
First side of thrust disc is relative with one bearing iron core, the hierarchic structure include along first face radially extended and
Along the second axially extending face；
Wherein, first face is relative with the end face of the first end of the described first protection bearing and is formed therebetween
The first described gap, the first end is one end of the close thrust disc of the described first protection bearing；And/or, it is described
Second face is relative with the shaft hole inner wall of the described first protection bearing and forms the second described gap therebetween.
In foregoing axial magnetic suspension bearing, optionally, the axis hole of one bearing iron core is close to the thrust
One end of disk is set in the first enlarging groove and described provided with the first enlarging groove annular in shape, the first protection bearing
First end protrudes from the first enlarging groove.
In foregoing axial magnetic suspension bearing, optionally, the first side of the thrust disc has and one bearing
Iron core is relative and forms the 3rd face of working clearance therebetween；
Wherein, the hierarchic structure is along described axially projecting in the 3rd face.
In foregoing axial magnetic suspension bearing, optionally, the axis hole of a bearing iron core is close to the thrust disc
One end includes the second described enlarging groove provided with the second enlarging groove annular in shape, first stopper section；
Second stopper section includes protection ring, and the protection ring is arranged on the first side of the thrust disc, the thrust
First side of disk is relative with one bearing iron core；
Wherein, the protection ring relative with the bottom surface of the second enlarging groove with the end face of the opposite one end of thrust disc and
The first described gap is formed therebetween；And/or, the side of the protection ring and the side phase of the second enlarging groove
To and form the second described gap therebetween.
In foregoing axial magnetic suspension bearing, optionally, the protection ring is made up of high-abrasive material.
On the other hand, embodiments of the invention also provide a kind of magnetic suspension system, and it includes the axle described in any of the above-described kind
To magnetic suspension bearing.
In foregoing magnetic suspension system, optionally, magnetic suspension system also includes being used for being set in the rotating shaft
Part provides the second protection structure of radially protection.
In foregoing magnetic suspension system, optionally, magnetic suspension system also includes being arranged on the axial magnetic suspension bearing
The axial magnetic device of side；
Second protection structure is arranged on the radial magnetic bearing
In foregoing magnetic suspension system, optionally, the axial magnetic device includes radial magnetic bearing and axle
Hold housing；
The bear box has axis hole, and one end of the axis hole of the bear box is provided with the 3rd enlarging groove annular in shape,
The radial magnetic bearing is set in the 3rd enlarging groove；
Second protection structure includes the second protection bearing, and the second protection bearing is set in the bear box
In axis hole；
The rotating shaft through described second protection bearing axis hole and with described second protection bearing axis hole inwall it
Between form third space, the third space, which is used to provide the part being set in the rotating shaft, radially to be protected.
On the other hand, embodiments of the invention also provide a kind of compressor, and it includes the magnetic suspension described in any of the above-described kind
System.
By above-mentioned technical proposal, axial magnetic suspension bearing of the present invention, magnetic suspension system and compressor at least have following
Beneficial effect：
In the technical scheme that the present invention is provided, used due to having in the axial direction between the first stopper section and the second stopper section
It is used in providing axial magnetic suspension bearing axially the first gap of protection and diametrically having to being set in rotating shaft
Part provides the second gap of radially protection, so that both can be to magnetic suspension system by the first gap and the second gap of setting
Axially protection is provided, can also provide and radially protect, making the practicality of axial magnetic suspension bearing of the present invention strengthens；In addition, may be used also
To save the extra space for setting radial direction to protect, design margin is improved.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, below with presently preferred embodiments of the present invention and coordinate accompanying drawing describe in detail as after.
Brief description of the drawings
Fig. 1 is the structural representation that a kind of axial magnetic suspension bearing of the prior art is assembled with rotating shaft；
Fig. 2 is the structural representation that a kind of axial magnetic suspension bearing that one embodiment of the invention is provided is assembled with rotating shaft；
Fig. 3 is the mplifying structure schematic diagram at A in Fig. 2；
Fig. 4 is the structural representation that another axial magnetic suspension bearing that one embodiment of the invention is provided is assembled with rotating shaft
Figure；
Fig. 5 is the mplifying structure schematic diagram at B in Fig. 4；
Fig. 6 is a kind of structural representation for magnetic suspension system that one embodiment of the invention is provided；
Fig. 7 is the structural representation for another magnetic suspension system that one embodiment of the invention is provided.
Reference：1st, stator；10th, axial magnetic suspension bearing；11st, preceding cod iron core；100th, magnetic suspension system；
111st, the first enlarging groove；112nd, the second enlarging groove；12nd, rear cod iron core；2nd, rotor；20th, rotating shaft；21st, thrust disc；211、
3rd face；3rd, the first protection structure；30th, axial magnetic device；31st, the first stopper section；311st, the first protection bearing；3111、
First end；3112nd, the shaft hole inner wall of the first protection bearing；32nd, the second stopper section；321st, hierarchic structure；3211st, the first face；
3212nd, the second face；322nd, protection ring；3221st, the end face of one end opposite with thrust disc of protection ring；3222nd, the side of protection ring；
4th, radial magnetic bearing；5th, bear box；51st, the axis hole of bear box；511st, the 3rd enlarging groove；6th, the second protection bearing；
7th, bearing plate；8th, front axle is to bearing control coil；9th, rear axial bearing control coil.
Embodiment
Further to illustrate the present invention to reach the technological means and effect that predetermined goal of the invention is taken, below in conjunction with
Accompanying drawing and preferred embodiment, to embodiment, structure, feature and its effect according to the present patent application, are described in detail such as
Afterwards.In the following description, what different " embodiment " or " embodiment " referred to is not necessarily same embodiment.In addition, one or more
Special characteristic, structure or feature in individual embodiment can be combined by any suitable form.
As shown in Figure 2 and Figure 4, a kind of axial magnetic suspension bearing 10 that one embodiment of the present of invention is proposed, the axial magnetic
Suspension bearing 10 is used to use cooperatively with rotating shaft 20.Specifically, the axial magnetic suspension bearing 10 is used to be set in rotating shaft 20.This
The axial magnetic suspension bearing 10 of invention includes stator 1, the protection structure 3 of rotor 2 and first.First protection structure 3 is stopped including first
The stopper section 32 of stopper 31 and second.
First stopper section 31 is set on the stator 1, and the second stopper section 32 is arranged on rotor 2.First stopper section 31 and
Between two stopper sections 32 in the axial direction have be used for axial magnetic suspension bearing 10 is provided axially protection the first gap H1 and
Diametrically having is used to provide the second gap H2 of radially protection (such as Fig. 3 and Fig. 5 institutes to the part being set in rotating shaft 20
Show).Need exist for explanation be：" part " herein is not only set in rotating shaft 20, and with gap between rotating shaft 20,
Such as the part can be stator of stator 1, radial magnetic bearing or motor of bearing magnetic suspension bearing etc..
Wherein, because the first gap H1 is the gap for providing axial magnetic suspension bearing 10 axially protection, thus this
One gap H1 is less than the working clearance H of axial magnetic suspension bearing 10.Likewise, because the second gap H2 is for being set in
Part in rotating shaft 20 provides the gap of radially protection, therefore between second gap H2 is less than between above-mentioned part and rotating shaft 20
Gap.When above-mentioned part is multiple, such as the second gap H2 will be stator 1, the radial direction magnetcisuspension of bearing magnetic suspension bearing simultaneously
Floating axle hold and motor stator provide protection when, then between the second gap H2 is less than between these all parts and rotating shaft 20
Gap.
, both can be to magnetic suspension by the first gap H1 and the second gap H2 of setting in the technical scheme of above-mentioned offer
System provides axially protection, can also provide and radially protect, making the practicality of axial magnetic suspension bearing 10 of the present invention strengthens；Separately
Outside, the extra space for setting and radially protecting can also be saved, design margin is improved.
As shown in Figure 3 and Figure 5, above-mentioned rotor 2 can include thrust disc 21.Stator 1 can include bearing iron core.Bearing
The quantity of iron core is two and is distributed in the both sides of thrust disc 21.Wherein, set between thrust disc 21 and at least one bearing iron core
There is the first foregoing protection structure 3.It is preferred that, the first foregoing protection knot is equipped between thrust disc 21 and two bearing iron cores
Structure 3.
Two above-mentioned bearing iron cores can be respectively preceding cod iron core 11 and rear cod iron core 12.Wherein,
The first foregoing protection structure 3 is provided between thrust disc 21 and preceding cod iron core 11 and/or rear cod iron core 12.
In order to form foregoing the first gap H1 and the second gap H2, embodiments of the invention can use following side
Case：In one example, as shown in figure 3, the first foregoing stopper section 31 includes the first protection bearing 311, the first protection bearing
311 are regularly set in the axis hole of a bearing iron core.One bearing iron core is preceding cod iron core 11 or rear axial direction
Bearing iron core 12.
Describe for convenience, below to have between thrust disc 21 and preceding cod iron core 11 provided with the first protection structure 3
Body is illustrated：In the first example, as shown in figure 3, the first protection bearing 311 is set in the axis hole of preceding cod iron core 11
It is interior.Second stopper section 32 includes hierarchic structure 321, and hierarchic structure 321 is arranged on the first side of thrust disc 21.The of thrust disc 21
Side is relative with above-mentioned preceding cod iron core 11.Hierarchic structure 321 includes the first face 3211 for radially extending and along axle
To the second face 3212 of extension." radial direction " herein refers to the radial direction of magnetic suspension bearing 10 vertically, likewise, " axle herein
To " refer to the axial direction of magnetic suspension bearing 10 vertically.
Wherein, the first face 3211 can be relative and at both with the end face of the first end 3111 of the first protection bearing 311
Between form the first foregoing gap H1.First end 3111 is one end of the close thrust disc 21 of the first protection bearing 311.
Second face 3212 can be relative with the shaft hole inner wall 3112 of the first protection bearing 311 and before being formed therebetween
The the second gap H2 stated.
In the examples described above, foregoing first may make up by the cooperation of the first protection bearing 311 and hierarchic structure 321
Gap H1 and the second gap H2, its structure is relatively simple, realizes more convenient.
Further, as shown in figure 3, the axis hole of foregoing preceding cod iron core 11 is provided with one end close to thrust disc 21
First enlarging groove 111 annular in shape.First protection bearing 311 is set in the first enlarging groove 111 and first end 3111 is protruded
In the first enlarging groove 111, to protect the preceding cod iron core 11, it is allowed to not come in contact with thrust disc 21.
Further, as shown in figure 3, the first side of foregoing thrust disc 21 has and the above-mentioned preceding phase of cod iron core 11
To and therebetween formed working clearance H the 3rd face 211.Wherein, foregoing hierarchic structure 321 magnetic suspension shaft vertically
Hold 10 it is axially projecting in the 3rd face 211, to provide protection to thrust disc 21, thrust disc 21 is not connect with a bearing iron core
Touch.
Need exist for explanation be：As shown in Fig. 2 also with can be between foregoing thrust disc 21 and rear cod iron core 12
The first foregoing protection structure 3 is set.Its specific structure and implementation may refer to thrust disc 21 in above-mentioned first example
The corresponding description of first protection structure 3, specifically will not be repeated here between preceding cod iron core 11.
In order to form foregoing the first gap H1 and the second gap H2, implementation of the invention can use following scheme：
In another example, as shown in Figure 4 and Figure 5, the axis hole of a bearing iron core is provided with annular in shape in one end close to thrust disc 21
The second enlarging groove 112.One bearing iron core is preceding cod iron core 11 or rear cod iron core 12.Foregoing first
Stopper section 31 includes the second enlarging groove 112.
Describe for convenience, below to have between thrust disc 21 and preceding cod iron core 11 provided with the first protection structure 3
Body is illustrated：In the second example, as shown in figure 5, the axis hole of preceding cod iron core 11 is in one end close to thrust disc 21
Provided with the second enlarging groove 112 annular in shape.The second foregoing stopper section 32 includes protection ring 322, and protection ring 322 is arranged on thrust
First side of disk 21, the first side of thrust disc 21 is relative with the preceding cod iron core 11.
Wherein, protection ring 322 with the end face 3221 of the opposite one end of thrust disc 21 can be with the second enlarging groove 112 bottom surface
Form relatively and therebetween the first foregoing gap H1.
Can be relative with the side of the second enlarging groove 112 and be formed therebetween foregoing in the side 3222 of protection ring 322
The second gap H2.Need exist for explanation be：Because protection ring 322 is annular in shape, the side 3222 of protection ring 322 refers to protection
The external cylindrical surface of ring 322.
In above-mentioned second example, foregoing first may make up by the cooperation of the second enlarging groove 112 and protection ring 322
Gap H1 and the second gap H2, its structure is relatively simple, realizes more convenient.
Further, foregoing protection ring 322 can be made up of the high-abrasive material such as graphite or babbit, to improve protection
The service life of ring 322.
Need exist for explanation be：As shown in figure 4, also with can be between foregoing thrust disc 21 and rear cod iron core 12
The first foregoing protection structure 3 is set.Its specific structure and implementation may refer to thrust disc 21 in above-mentioned second example
The corresponding description of first protection structure 3, specifically will not be repeated here between preceding cod iron core 11.
On the other hand, as shown in Figure 6 and Figure 7, embodiments of the invention also provide a kind of magnetic suspension system 100, and it includes
Axial magnetic suspension bearing 10 in any of the above-described example.Due to setting the reason of aforementioned axial magnetic suspension bearing 10, it both can be with
To axially providing protection, protection can be provided to radial direction again；Furthermore it is also possible to save the extra space for setting and radially protecting, carry
High design margin.
Further, as shown in Figure 6 and Figure 7, magnetic suspension system 100 of the invention also includes being used for being set in rotating shaft 20
On part provide radially protection the second protection structure.Second protection structure coordinates with the first foregoing protection structure 3, real
Show the double-deck of high-mechanic end radially to protect, improve the reliability of magnetic suspension system 100 of the present invention.
Further, as shown in Figure 6 and Figure 7, magnetic suspension system 100 of the invention also includes being arranged on axial magnetic suspension axle
Hold the axial magnetic device 30 of 10 sides.The second foregoing protection structure is arranged on the radial magnetic bearing 30.
It is preferred that, foregoing axial magnetic device 30 can include radial magnetic bearing 4 and bear box 5.Bearing
Housing 5 has axis hole 51.One end of the axis hole 51 of bear box 5 is provided with the 3rd enlarging groove 511 annular in shape.Foregoing radial direction magnetic
Suspension bearing 4 is set in the 3rd enlarging groove 511.The second foregoing protection structure includes the second protection bearing 6, the second protection
Bearing 6 is set in the axis hole 51 of bear box 5.Foregoing rotating shaft 20 is protected through the second axis hole for protecting bearing 6 and with second
Third space H3 is formed between the inwall for the axis hole for protecting bearing 6, third space H3 is used to carry the part being set in rotating shaft 20
Protected for radial direction.Specifically, third space H3 is less than the working clearance H4 of radial magnetic bearing 4.
Further, as shown in Figure 6 and Figure 7, the quantity of foregoing second protection bearing 6 can be at least two, to improve
The reliability radially protected.
As shown in Figure 6 and Figure 7, foregoing axial magnetic device 30 can also include bearing plate 7, and bearing plate 7 is used
In compressing the second protection bearing 6, to prevent the second protection bearing 6 from being released out of bear box 5 axis hole 51.
In a specific application example, the quantity of foregoing axial magnetic device 30 is two, each radial direction magnetcisuspension
The second foregoing protection structure is equipped with floating device 30.
On the other hand, embodiments of the invention also provide a kind of compressor, and it includes the magnetcisuspension in any of the above-described embodiment
Floating system 100.Due to setting the reason of above-mentioned magnetic suspension system 100, because magnetic suspension system 100 includes above-mentioned axial magnetcisuspension
Floating axle holds 10, and it both can provide protection to radial direction again to axially providing protection；Furthermore it is also possible to save extra setting
Radially the space of protection, improves design margin.
The operation principle and preferred embodiment of the present invention is described below.
In the first embodiment, as shown in Figures 2 and 3, a kind of magnetic suspension system 100, applied in magnetic levitation product, is wrapped
Preceding cod iron core 11, front axle are included to bearing control coil 8, preceding protection bearing (the i.e. first protection bearing 311), thrust disc
21st, protection bearing (the i.e. first protection bearing 311), rear axial bearing control coil 9, rear cod iron core 12, rotating shaft 20 afterwards.
Wherein, rotating shaft 20 can be optical axis etc..When axial magnetic suspension bearing 10 works in the invention, preceding cod iron core 11, thrust
There is provided axial magnetcisuspension for the axial running clearance of formation axial magnetic suspension bearing 10 between disk 21, the rear three of cod iron core 12
Floating axle holds magnetic pull needed for 10 work.Preceding protection bearing, afterwards protection bearing, the axial direction of the step surface of thrust disc 21 form axial direction
Portable protective gaps, i.e., the first foregoing gap H1, the first gap H1 requirements are less than axial running clearance H, so as to play to axial magnetic
The axial protective effect of suspension bearing 10.Radial clearance can be formed between rotating shaft 20 and each part when magnetic suspension system 100 is assembled,
The radial direction formation radial direction portable protective gaps of preceding protection bearing, afterwards protection bearing, the step surface of thrust disc 21, i.e., between foregoing second
Gap H2, so as to play a part of radially protecting magnetic suspension system 100.The structure of thrust disc 21 is changed in the invention, makes axle
The radial direction protection to magnetic suspension system 100 is realized while axially protection is provided to magnetic suspension bearing 10, saving is additionally set
The space of radially protection is put, design margin is improved.
In a second embodiment, as shown in Figure 4 and Figure 5, a kind of magnetic suspension system 100, applied in magnetic levitation product, is wrapped
Cod iron core 11, front axle are to bearing control coil 8, front axle to protection ring 322, thrust disc 21, rear axial protection ring before including
322nd, rear axial bearing control coil 9, rear cod iron core 12, rotating shaft 20.Wherein, rotating shaft 20 can be optical axis etc..The hair
When bright middle axial magnetic suspension bearing 10 works, between preceding cod iron core 11, thrust disc 21, the rear three of cod iron core 12
The working clearance for forming axial magnetic suspension bearing 10 works required magnetic pull there is provided axial magnetic suspension bearing 10.Front axle is to protection
The axial direction formation axial magnetic of ring 322 and preceding cod iron core 11, rear axial protection ring 322 and rear cod iron core 12
The axial portable protective gaps of suspension bearing 10, i.e., the first foregoing gap H1, the first gap H1 requirements are less than working clearance H, so that
Play the axial protective effect to axial magnetic suspension bearing 10.Meeting between rotating shaft 20 and each part when magnetic suspension system 100 is assembled
Form radial clearance, front axle is to protection ring 322 and preceding cod iron core 11, rear axial protection ring 322 and rear cod iron
The radial direction formation radial direction portable protective gaps of core 12, i.e., the second foregoing gap H2, so as to play to magnetic suspension system 100 radially
The effect of protection.Axle is added to protection ring 322 on rotor 2 in the invention, and axle is to protection ring 322 using resistance to
Material such as graphite or babbit etc. are ground, axial magnetic suspension bearing 10 is realized while axially protection is provided to magnetic suspension
The radial direction protection of system 100, saves the space of extra setting radial direction protection, improves design margin.
In the third embodiment, as shown in fig. 6, a kind of magnetic suspension system 100, applied in magnetic levitation product, including it is preceding
Cod iron core 11, front axle to bearing control coil 8, preceding protection bearing (i.e. first protect bearing 311), thrust disc 21, after
Protect bearing (i.e. first protection bearing 311), rear axial direction bearing control coil 9, rear cod iron core 12, rotating shaft 20 and preceding
The axial magnetic device 30 stated.Axial magnetic suspension bearing 10 in the present embodiment and the axial magnetcisuspension in above-mentioned first embodiment
Floating axle holds 10 structure and principle all same, but also using the foregoing axial magnetic device 30 with the second protection structure,
It cooperatively forms two grades of radially protections with axial magnetic suspension bearing 10, realizes that the double-deck of high-mechanic end is radially protected, improves magnetic
The reliability of suspension system 100.
In the fourth embodiment, as shown in fig. 7, a kind of magnetic suspension system 100, applied in magnetic levitation product, including it is preceding
Cod iron core 11, front axle to bearing control coil 8, front axle to protection ring 322, thrust disc 21, rear axial protection ring 322,
Axial bearing control coil 9, rear cod iron core 12, rotating shaft 20 and foregoing axial magnetic device 30 afterwards.This implementation
The structure and principle all same of axial magnetic suspension bearing 10 and the axial magnetic suspension bearing 10 in above-mentioned second embodiment in example,
But also using the foregoing axial magnetic device 30 with the second protection structure, it is cooperatively formed with axial magnetic suspension bearing 10
Two grades are radially protected, and are realized that the double-deck of high-mechanic end is radially protected, are improved the reliability of magnetic suspension system 100.
Embodiment more than, axial magnetic suspension bearing 10, magnetic suspension system 100 and compressor of the invention at least has
There are following advantages：
General, magnetic suspension application product is ultrahigh speed machine.Magnetic suspension bearing is its key components and parts, once magnetcisuspension
Floating system 100 breaks down, and magnetic levitation product will be unable to start and suspend, it is impossible to normal operation, causes production loss.Thus setting
It can give magnetic suspension bearing design corresponding protection component when counting magnetic suspension bearing.The axial magnetic suspension bearing 10 of the present invention can be same
Radial and axial protections of the Shi Shixian to magnetic suspension system 100, saves the extra space for setting and radially protecting, improves design remaining
Amount.Or coordinate other radial direction protection devices, realize that the double-deck of high-mechanic end is radially protected, improve magnetic suspension system 100 can
By property.
Need exist for explanation be：In the case where not conflicting, those skilled in the art can incite somebody to action according to actual conditions
Related technical characteristic is mutually combined in above-mentioned each example, to reach corresponding technique effect, particularly for various combined situations
Do not repeat one by one herein.
The above described is only a preferred embodiment of the present invention, any formal limitation not is made to the present invention, according to
Any simple modification, equivalent variations and the modification made according to the technical spirit of the present invention to above example, still fall within this hair
In the range of bright technical scheme.
Claims (12)
1. a kind of axial magnetic suspension bearing, for being used cooperatively with rotating shaft (20), the axial magnetic suspension bearing includes stator
(1), rotor (2) and the first protection structure (3)；Characterized in that, first protection structure (3) includes the first stopper section (31)
With the second stopper section (32)；
First stopper section (31) is arranged on the stator (1), and second stopper section (32) is arranged on the rotor (2)
On；Having between first stopper section (31) and second stopper section (32) on the axial direction is used for the axial magnetic
Suspension bearing provides axially the first gap H1 of protection and radially had for being set in the rotating shaft (20) described
On part provide radially protection the second gap H2.
2. axial magnetic suspension bearing as claimed in claim 1, it is characterised in that
The rotor (2) includes thrust disc (21), and the stator (1) includes bearing iron core, and the quantity of the bearing iron core is two
Both sides that are individual and being distributed in the thrust disc (21)；
Wherein, described the first protection structure (3) is provided between the thrust disc (21) and at least one described bearing iron core.
3. axial magnetic suspension bearing as claimed in claim 2, it is characterised in that
First stopper section (31) includes the first protection bearing (311), and the first protection bearing (311) is regularly set in
In the axis hole of one bearing iron core；
Second stopper section (32) includes hierarchic structure (321), and the hierarchic structure (321) is arranged on the thrust disc (21)
The first side, the first side of the thrust disc (21) is relative with one bearing iron core, and the hierarchic structure (321) includes edge
First face (3211) radially extended and along axially extending second face (3212)；
Wherein, first face (3211) with described first protection bearing (311) first end (3111) end face it is relative and
The first described gap H1 is formed between the two, and the first end (3111) is the described first close institute for protecting bearing (311)
State one end of thrust disc (21)；And/or, second face (3212) and the shaft hole inner wall phase of the described first protection bearing (311)
To and form the second described gap H2 therebetween.
4. axial magnetic suspension bearing as claimed in claim 3, it is characterised in that
The axis hole of one bearing iron core is in one end close to the thrust disc (21) provided with the first enlarging groove annular in shape
(111), the first protection bearing (311) is set in the first enlarging groove (111) and the first end (3111) protrusion
In the first enlarging groove (111).
5. the axial magnetic suspension bearing as described in claim 3 or 4, it is characterised in that
First side of the thrust disc (21) has relative with one bearing iron core and forms the working clearance therebetween
The 3rd face (211)；
Wherein, the hierarchic structure (321) is along described axially projecting in the 3rd face (211).
6. axial magnetic suspension bearing as claimed in claim 2, it is characterised in that
The axis hole of one bearing iron core is provided with the second enlarging groove (112) annular in shape in one end close to the thrust disc (21),
First stopper section (31) includes the second described enlarging groove (112)；
Second stopper section (32) includes protection ring (322), and the protection ring (322) is arranged on the of the thrust disc (21)
Side, the first side of the thrust disc (21) is relative with one bearing iron core；
Wherein, the end face (3221) of one end opposite with thrust disc (21) of the protection ring (322) and the second enlarging groove
(112) bottom surface is relative and forms the first described gap H1 therebetween；And/or, the side of the protection ring (322)
(3222) it is relative with the side of the second enlarging groove (112) and form the second described gap H2 therebetween.
7. axial magnetic suspension bearing as claimed in claim 6, it is characterised in that
The protection ring (322) is made up of high-abrasive material.
8. a kind of magnetic suspension system, it is characterised in that including the axial magnetic suspension bearing any one of claim 1 to 7.
9. magnetic suspension system as claimed in claim 8, it is characterised in that also including for being set in the rotating shaft (20)
Part provide radially protection the second protection structure.
10. magnetic suspension system as claimed in claim 9, it is characterised in that also including being arranged on the axial magnetic suspension bearing
The axial magnetic device (30) of side；
Second protection structure is arranged on the radial magnetic bearing (30).
11. magnetic suspension system as claimed in claim 10, it is characterised in that
The axial magnetic device (30) includes radial magnetic bearing (4) and bear box (5)；
The bear box (5) has an axis hole (51), and one end of the axis hole (51) of the bear box (5) is provided with annular in shape the
Three enlarging grooves (511), the radial magnetic bearing (4) is set in the 3rd enlarging groove (511)；
Second protection structure includes the second protection bearing (6), and the second protection bearing (6) is set in the bear box
(5) in axis hole (51)；
The rotating shaft (20) through the described second protection bearing (6) axis hole and with the axis hole of the described second protection bearing (6)
Third space H3, the third space H3 are formed between inwall is used for the part offer radial direction to being set in the rotating shaft (20)
Protection.
12. a kind of compressor, it is characterised in that including the magnetic suspension system any one of claim 8 to 11.
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| CN201710438261.5A CN107100932B (en) | 2017-06-12 | 2017-06-12 | Axial magnetic suspension bearing, magnetic suspension system and compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710438261.5A CN107100932B (en) | 2017-06-12 | 2017-06-12 | Axial magnetic suspension bearing, magnetic suspension system and compressor |
Publications (2)
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| CN107100932A true CN107100932A (en) | 2017-08-29 |
| CN107100932B CN107100932B (en) | 2023-01-13 |
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| CN107588111A (en) * | 2017-10-30 | 2018-01-16 | 南京磁谷科技有限公司 | A kind of thrust disc structure of magnetic suspension rotor |
| CN109058291A (en) * | 2018-08-06 | 2018-12-21 | 珠海格力电器股份有限公司 | Magnetic bearing structure and magnetic suspension motor |
| CN109763994A (en) * | 2019-02-21 | 2019-05-17 | 珠海格力电器股份有限公司 | Magnetic suspension bearing and magnetic suspension centrifugal compressor, air conditioner |
| WO2021139292A1 (en) * | 2020-01-07 | 2021-07-15 | 珠海格力电器股份有限公司 | Axial protection system for magnetic suspension bearing and rotating shaft assembly |
| CN113700744A (en) * | 2021-09-23 | 2021-11-26 | 珠海格力电器股份有限公司 | Magnetic suspension bearing, compressor and air conditioner |
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