CN113623319B - Magnetic suspension bearing with safety braking protection function - Google Patents
Magnetic suspension bearing with safety braking protection function Download PDFInfo
- Publication number
- CN113623319B CN113623319B CN202110770954.0A CN202110770954A CN113623319B CN 113623319 B CN113623319 B CN 113623319B CN 202110770954 A CN202110770954 A CN 202110770954A CN 113623319 B CN113623319 B CN 113623319B
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- magnetic
- bearing
- braking
- coil
- iron core
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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
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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
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
- F16C41/001—Integrated brakes or clutches for stopping or coupling the relatively movable parts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Abstract
The invention relates to the technical field of magnetic suspension bearings, and particularly discloses a magnetic suspension bearing with a safety braking protection function; the magnetic bearing iron core is concentrically provided with a magnetic bearing coil and a brake coil, the magnetic bearing coil and the brake coil are respectively arranged at the outer end and the inner end of the magnetic bearing iron core, the magnetic bearing iron core positioned at the inner side of the brake coil is provided with a plurality of through holes, each through hole is internally provided with a connecting pin, the upper ends of the connecting pins are commonly connected with a brake sucker made of magnetic conductive metal materials, the connecting pins are sleeved with supporting springs, and the lower ends of the connecting pins are commonly connected with a protective brake disc; the novel magnetic suspension bearing disclosed by the invention is of an integrated structural design, the bearing and the braking function are of a double-magnetic-circuit design, the two magnetic circuits are not influenced mutually, the whole bearing has all functions of a common magnetic suspension bearing and also has the functions of standby protection and active braking, and the whole bearing is compact in structure, saves space and is small in size and wide in application scene.
Description
Technical Field
The invention relates to the technical field of magnetic suspension bearings, and particularly discloses a magnetic suspension bearing with a safety braking protection function.
Background
The magnetic suspension bearing is a bearing which uses magnetic force to suspend the rotor in the air so that the rotor and the stator have no mechanical contact. Compared with the traditional rolling bearing, sliding bearing and oil film bearing, the magnetic bearing has no mechanical contact, and the rotor can run to very high rotation speed, and has the advantages of small mechanical abrasion, low energy consumption, small noise, long service life, no need of lubrication, no oil pollution and the like.
At present, a magnetic suspension bearing is adopted in a flywheel energy storage system to replace a traditional bearing, when the energy storage flywheel is safely protected, the bearing is physically protected, a braking mode is mainly used for braking by discharging a motor, the energy storage flywheel belongs to high-speed large-inertia rotary machinery, and once the electromechanical runaway exists, a great potential safety hazard exists. Therefore, the magnetic suspension bearing with the safety braking protection function is designed as a basis for ensuring the safe and stable operation of the flywheel energy storage system, and the magnetic suspension bearing with the active safety protection function on the basis of having the advantage function of the common magnetic suspension bearing is provided.
Disclosure of Invention
The invention aims to design a magnetic suspension bearing with active safety protection on the basis of having the advantage of a common magnetic suspension bearing aiming at the defect that the traditional magnetic suspension bearing does not have the safety braking protection function.
The invention is realized by the following technical scheme:
the utility model provides a magnetic suspension bearing with safety braking protect function, includes the magnetic bearing iron core, be provided with magnetic bearing coil and brake coil in the magnetic bearing iron core with one heart, and magnetic bearing coil, brake coil set up respectively in the outer end and the inner of magnetic bearing iron core, are located be annular array form offered a plurality of through-holes on the magnetic bearing iron core of brake coil inboard, every all be provided with the connecting pin in the through-hole, a plurality of the upper end of connecting pin is connected with the brake sucking disc of being made by magnetic conduction metal material jointly, is located the connecting pin cover between brake sucking disc and the magnetic bearing iron core is equipped with supporting spring, a plurality of the lower extreme of connecting pin is connected with the protection brake disc jointly.
As a further arrangement of the scheme, the magnetic bearing iron core is provided with an inner groove and an outer groove, the inner groove and the outer groove are respectively arranged on the front surface and the back surface of the magnetic bearing iron core, the magnetic bearing coil is arranged in the outer groove, and the brake coil is arranged in the inner groove.
As a further arrangement of the scheme, the inner groove and the outer groove are filled with insulating heat-conducting glue for fixing the magnetic bearing coil and the brake coil.
As a further arrangement of the scheme, the outer diameter of the brake sucker is larger than the winding diameter of the brake coil and smaller than the winding diameter of the magnetic bearing coil.
As a further arrangement of the scheme, the lower surface of the magnetic bearing iron core is provided with a containing groove, the protective brake disc is arranged in the containing groove, and the working surface of the protective brake disc extends out of the notch of the containing groove.
As a further arrangement of the scheme, the upper end of the connecting pin is in a circular ladder shape, and a ladder clamping hole matched with the upper end of the connecting pin is formed in the inner side surface of the brake sucker.
As a further arrangement of the scheme, the inner side surface of the brake sucker is provided with a circular groove with the diameter smaller than the winding diameter of the brake coil, and a plurality of clamping holes are formed in the circular groove in an annular array shape.
As a further arrangement of the above solution, the protective brake disc is made of a non-metallic wear-resistant heat conductive material, and the working surface of the protective brake disc is provided with diverging stripes.
As a further arrangement of the scheme, the magnetic suspension bearings are used in pairs and are arranged at two ends of the shaft in a mirror symmetry mode.
The beneficial effects are that:
1) The novel magnetic suspension bearing disclosed by the invention generates the adsorption force to the brake sucker through the arranged brake coil, and the adsorption force overcomes the spring supporting force to enable a moving assembly consisting of the brake sucker, the connecting wire and the protective brake disc to move to the working plane so as to enable the protective brake disc to be in contact with the working plane to generate friction, thereby realizing the braking function; through the design, the whole magnetic suspension bearing has an active physical braking function, is flexible to control and is safe and reliable in physical braking.
2) The novel magnetic suspension bearing disclosed by the invention is of an integrated structural design, the bearing and the braking function are of a double-magnetic-circuit design, the two magnetic circuits are not influenced mutually, the whole bearing has all functions of a common magnetic suspension bearing and also has the functions of standby protection and active braking, and the whole bearing is compact in structure, saves space and is small in size and wide in application scene.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic plan view of the present invention;
FIG. 2 is a first angular perspective semi-cutaway view of the present invention;
FIG. 3 is a second angular perspective semi-cutaway view of the present invention;
FIG. 4 is a schematic diagram of the front and back perspective structures of a magnetic bearing core according to the present invention;
FIG. 5 is a schematic view of the front and back side of the brake cup of the present invention;
FIG. 6 is a schematic perspective view of a connecting pin according to the present invention;
FIG. 7 is a schematic view of the front and rear perspective of the protective brake disc of the present invention;
FIG. 8 is a schematic plan view of the magnetic bearing of the present invention assembled with a flywheel;
FIG. 9 is a schematic plan view of a magnetic bearing of the present invention in a normal mode;
fig. 10 is a schematic plan view of the magnetic bearing of the present invention in a braking mode.
Wherein:
the device comprises a connecting pin 1, a supporting spring 2, a braking sucker 3, a step clamping hole 301, a round groove 302, a braking coil 4, a magnetic bearing coil 5, a magnetic bearing iron core 6, a through hole 601, a mounting fixing hole 602, a holding groove 603, a protective braking disc 7, a divergent stripe 701, a round groove 702 and a flywheel 8.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present invention and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.
Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present invention will be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "mounted," "configured," "provided," "connected," "coupled," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will now be described in detail with reference to the accompanying drawings 1-10, in conjunction with examples.
The invention discloses a novel magnetic suspension bearing with a safety braking protection function, which mainly comprises seven parts with reference to fig. 1, fig. 2 and fig. 3: the connecting pin 1, the supporting spring 2, the brake sucker 3, the brake coil 4, the magnetic bearing coil 5, the magnetic bearing iron core 6 and the protection brake disc 7. Wherein, the brake coil 4, the magnetic bearing coil 5 and the magnetic bearing iron core 6 are integrated and can be called as a fixed component; the connecting pin 1, the brake disc 3 and the protective brake disc 7 are integrated and can be called a moving assembly. The moving assembly is supported by the supporting spring 2 and moves up and down by utilizing the clearance fit effect between the through hole formed in the magnetic bearing iron core 6 and the connecting pin 1.
Referring to fig. 4, the magnetic bearing core 6 is designed for an inner and an outer reverse grooves, and the inner and the outer reverse grooves are concentrically arranged. The outer ring groove is downward at the position for placing the magnetic bearing coil 5, and the inner ring groove is upward at the position for placing the brake coil 4. The magnetic bearing coil 5 is formed by winding an insulated enameled wire, and can be formed by winding one or more coils, the brake coil 4 is formed by winding an insulated enameled wire, and can also be formed by connecting one or more coils in parallel, and the magnetic bearing coil 5 and the brake coil 4 are solidified and fixed in a groove of the magnetic bearing iron core 6 by using insulating heat-conducting glue. Meanwhile, the inner wall of the hole in the center of the magnetic bearing iron core 6 has a spigot positioning function, so that the coaxiality of the installation position of the magnetic bearing can be ensured. Around the center hole of the bearing core 6, a mounting fixing hole 602 is formed for fixing the bearing core 6. Further outwards is a larger through hole 601, which is used to constrain the guide pin 1. Wherein, the magnetic bearing iron core 6 is made of magnetic conductive metal material, and can be magnetically conductive to form a closed magnetic circuit.
Referring to fig. 5, a concave circular groove 302 is formed in the bottom surface of the inner ring of the brake chuck 3, and a circle of stepped clamping holes 301 are formed. The stepped engagement hole 301 is for connecting and axially restraining the connection pin 1. The outer diameter of the brake sucker 3 is larger than the winding diameter of the brake coil 4 and smaller than the winding diameter of the magnetic bearing coil 5, so that magnetic leakage is reduced between the brake sucker 3 and the magnetic bearing iron core 6 when the magnetic bearing works normally. The concave circular groove 302 formed on the bottom surface of the inner ring of the brake sucker 3 has the function of enlarging the gap of the non-acting surface, reducing magnetic leakage and enabling electromagnetic force to act on the working surface in a concentrated manner. Meanwhile, the material of the brake sucker 3 is also magnetic conduction metal material, and can be magnetically conducted to form a closed magnetic circuit.
Referring to fig. 6, the upper end of the connecting pin 1 is in a circular step shape, which is matched with a step clamping hole 301 on the brake sucker 3 in a positioning way, and the connecting pin and the step clamping hole are fixedly connected by interference fit. The middle part of the connecting pin 1 is in clearance fit with the through hole 601 of the magnetic bearing iron core 6, and plays a role in guiding movement of the moving assembly. Meanwhile, the connecting pin 1 is made of a non-magnetic metal material, so that a magnetic circuit can be blocked.
Referring to fig. 7, the protective brake disc 7 is made of a nonmetallic wear-resistant heat-conducting material. The shape of the protection brake disc 7 is a circular ring, a circle of circular groove 702 is formed in the front face, the lower end of the connecting pin 1 is in interference fit with the circular groove 702 on the protection brake disc 7, and the function of connection and fixation is achieved. The back of the protective brake disc 7 is a contact surface with the working plane, and has a circle of divergent stripes 701, which mainly has the function of increasing friction resistance and improving braking effect. Meanwhile, an accommodating groove 603 is formed in the lower surface of the magnetic bearing iron core 6, a protection brake disc 7 is installed in the accommodating groove 603, and a working surface (namely the back surface) of the protection brake disc 7 extends out of a notch of the accommodating groove 603 to be arranged at a certain thickness, so that the surface of the rotor is contacted with the surface of the protection brake disc 7 firstly under the condition of instability of the rotor, and the working surface of the magnetic bearing is protected.
Referring to fig. 1 and 3, a supporting spring 2 is sleeved on a connecting pin 1 between a brake sucker 3 and a magnetic bearing iron core 6, and mainly serves to maintain a separation gap between the brake sucker 3 and the magnetic bearing iron core 6 when a brake function is not used. Meanwhile, the supporting spring 2 is made of a non-magnetic metal material, so that a magnetic circuit can be blocked, and the rigidity of the supporting spring 2 does not need to be set too large.
When the novel magnetic suspension bearing with the safety braking protection function disclosed by the invention is used in a flywheel, the assembly diagram between the novel magnetic suspension bearing and the flywheel 8 can be referred to as fig. 8. The novel magnetic suspension bearings are generally used in pairs and symmetrically arranged on two sides of the flywheel, and the active braking function is used for simultaneously giving out instructions to the two magnetic bearings, so that the action consistency is ensured.
The specific working principle of the novel magnetic suspension bearing disclosed by the invention is as follows:
in the normal mode, when the novel magnetic suspension bearing works normally on a rotation plane, a magnetic field is formed by passing current in the magnetic bearing coil 5, no current is applied to the brake coil 4, no magnetic field is generated, the magnetic bearing iron core 6 and the working plane are made of magnetic conduction materials, and the connecting pin 1, the supporting spring 2 and the protective brake disc 7 are made of non-magnetic conduction materials, so that a magnetic circuit is formed, as shown in fig. 9, and only the magnetic suspension bearing generates suction force on the working plane.
In the braking mode, when the novel magnetic suspension bearing needs active braking, currents are conducted in the magnetic bearing coil 5 and the braking coil 4, but the current directions are opposite to each other, a magnetic field is formed, as shown in fig. 10, at the moment, the magnetic suspension bearing not only generates an electromagnetic attraction force on a working plane, but also generates an electromagnetic attraction force on the braking sucker 3, the electromagnetic attraction force is far greater than the elastic force of the supporting spring 2, and the electromagnetic attraction force is larger and larger along with the reduction of the air gap between the braking sucker 3 and the magnetic bearing iron core 6. Therefore, the brake sucker 3 drives the connecting pin 1 and the protective brake disc 7 to move downwards, so that the brake sucker 3 contacts with the working surface to generate friction, and the rotor is braked in a decelerating way until the rotor stops running.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (6)
1. The magnetic suspension bearing with the safety braking protection function comprises a magnetic bearing iron core (6), and is characterized in that a magnetic bearing coil (5) and a braking coil (4) are concentrically arranged in the magnetic bearing iron core (6), the magnetic bearing coil (5) and the braking coil (4) are respectively arranged at the outer end and the inner end of the magnetic bearing iron core (6), a plurality of through holes (601) are formed in the magnetic bearing iron core (6) positioned at the inner side of the braking coil (4) in an annular array shape, a connecting pin (1) is arranged in each through hole (601), the upper ends of the connecting pins (1) are commonly connected with a braking sucker (3) made of magnetic conductive metal materials, a supporting spring (2) is sleeved on the connecting pin (1) positioned between the braking sucker (3) and the magnetic bearing iron core (6), and the lower ends of the connecting pins (1) are commonly connected with a protection braking disc (7);
the magnetic bearing iron core (6) is provided with an inner groove and an outer groove, the inner groove and the outer groove are respectively arranged on the front surface and the back surface of the magnetic bearing iron core (6), the magnetic bearing coil (5) is arranged in the outer groove, and the brake coil (4) is arranged in the inner groove;
an accommodating groove (603) is formed in the lower surface of the magnetic bearing iron core (6), the protection brake disc (7) is arranged in the accommodating groove (603), and the working surface of the protection brake disc (7) extends out of the notch of the accommodating groove (603);
the protective brake disc (7) is made of nonmetal wear-resistant heat-conducting materials, and the working surface of the protective brake disc (7) is provided with divergent stripes (701).
2. The magnetic suspension bearing with the safety braking protection function according to claim 1, wherein the inner groove and the outer groove are filled with insulating heat-conducting glue for fixing the magnetic bearing coil (5) and the braking coil (4).
3. The magnetic suspension bearing with the safety braking protection function according to claim 1, wherein the outer diameter of the braking sucker (3) is larger than the winding diameter of the braking coil (4) and smaller than the winding diameter of the magnetic bearing coil (5).
4. The magnetic suspension bearing with the safety braking protection function according to claim 1, wherein the upper end of the connecting pin (1) is in a circular ladder shape, and a ladder clamping hole (301) matched with the upper end of the connecting pin (1) is formed in the inner side surface of the braking sucker (3).
5. The magnetic suspension bearing with the safety braking protection function according to claim 4, wherein the inner side surface of the braking sucker (3) is provided with a circular groove (302) with the diameter smaller than the winding diameter of the braking coil (4), and a plurality of clamping holes (301) are formed in the circular groove (302) in a ring-shaped array shape.
6. The magnetic suspension bearing with the safety braking protection function according to claim 1, wherein the magnetic suspension bearings are used in pairs and are installed at both ends of the shaft in a mirror symmetry manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110770954.0A CN113623319B (en) | 2021-07-08 | 2021-07-08 | Magnetic suspension bearing with safety braking protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110770954.0A CN113623319B (en) | 2021-07-08 | 2021-07-08 | Magnetic suspension bearing with safety braking protection function |
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| Publication Number | Publication Date |
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| CN113623319A CN113623319A (en) | 2021-11-09 |
| CN113623319B true CN113623319B (en) | 2023-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110770954.0A Active CN113623319B (en) | 2021-07-08 | 2021-07-08 | Magnetic suspension bearing with safety braking protection function |
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| CN (1) | CN113623319B (en) |
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| CN113623319A (en) | 2021-11-09 |
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