CN115076230A - Auxiliary supporting structure for magnetic suspension motor and manufacturing method of auxiliary bearing - Google Patents

Auxiliary supporting structure for magnetic suspension motor and manufacturing method of auxiliary bearing Download PDF

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Publication number
CN115076230A
CN115076230A CN202210888122.3A CN202210888122A CN115076230A CN 115076230 A CN115076230 A CN 115076230A CN 202210888122 A CN202210888122 A CN 202210888122A CN 115076230 A CN115076230 A CN 115076230A
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CN
China
Prior art keywords
bearing
auxiliary
inner ring
arc
damping
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Pending
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CN202210888122.3A
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Chinese (zh)
Inventor
李永胜
何小宏
张婕妤
李致宇
张海刚
刘辉
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Shandong Tianrui Heavy Industry Co Ltd
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Shandong Tianrui Heavy Industry Co Ltd
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Priority to CN202210888122.3A priority Critical patent/CN115076230A/en
Publication of CN115076230A publication Critical patent/CN115076230A/en
Pending legal-status Critical Current

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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
    • F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/36—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases using ionised gases, e.g. ionitriding
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/583—Details of specific parts of races
    • F16C33/585—Details of specific parts of races of raceways, e.g. ribs to guide the rollers
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/60—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/64—Special methods of manufacture
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6696—Special parts or details in view of lubrication with solids as lubricant, e.g. dry coatings, powder
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • 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
    • F16C2223/00—Surface treatments; Hardening; Coating
    • F16C2223/30—Coating surfaces
    • 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
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

The invention provides an auxiliary support structure for a magnetic suspension motor and a manufacturing method of an auxiliary bearing, and relates to the technical field of bearings, wherein the auxiliary support structure for the magnetic suspension motor is used for carrying out auxiliary support on a rotor of the magnetic suspension motor and comprises a bearing seat, an auxiliary bearing and a vibration damping piece; the auxiliary bearing is arranged in the bearing seat and sleeved on the rotor; the damping piece sets up between bearing frame and auxiliary bearing, and the damping piece includes installation department and damping portion, and the installation department is installed in auxiliary bearing's the outside, and damping portion includes a plurality of elastic damping claws that link to each other with the radial outside of installation department, and a plurality of elastic damping claws are arranged along auxiliary bearing's circumference interval. This openly uses through the cooperation of damping portion and installation department in the damping piece, when having solved magnetic suspension motor's rotor and falling, causes the problem of harm to auxiliary bearing.

Description

Auxiliary supporting structure for magnetic suspension motor and manufacturing method of auxiliary bearing
Technical Field
The disclosure relates to the technical field of bearings, in particular to an auxiliary supporting structure for a magnetic suspension motor and a manufacturing method of an auxiliary bearing.
Background
At present, magnetic suspension bearings are widely applied to high-speed rotating machinery, but an electromagnetic bearing system has risks of overload and sudden power failure, so that a rotor collides with stator components such as the electromagnetic bearings, and the system is possibly damaged; in order to protect the safe operation of the high-speed rotating machine, the magnetic suspension bearing needs other bearings to assist the work of the high-speed rotating machine, and the auxiliary bearing can protect the rotor, the stator assembly and the magnetic suspension bearing under the above conditions.
For a horizontal magnetic bearing system, the working rotating speed of a rotor is more than 30000r/min, and under the action of gravity, when the rotor of a magnetic suspension motor falls at a high speed, the downward radial impact force of the rotor is several times that of the whole shaft system, so that the common auxiliary bearing can be damaged to different degrees when falling, the common damage forms have the problems of adhesion and blocking of balls and raceways, burning and abrasion of the raceways and the like, the effect of protecting the bearing is lost, and the damage to other magnetic bearing system components is caused.
Disclosure of Invention
The following is a summary of the subject matter described in detail in this disclosure. This summary is not intended to limit the scope of the claims.
The utility model provides a magnetic levitation motor is with supplementary bearing structure for rotor to the magnetic levitation motor carries out the auxiliary stay, includes:
a bearing seat;
the auxiliary bearing is arranged in the bearing seat and sleeved on the rotor;
damping piece, set up in the bearing frame with between the auxiliary bearing, damping piece includes installation department and damping portion, the installation department install in auxiliary bearing's the outside, damping portion include a plurality of with the elasticity damping claw that the radial outside of installation department links to each other, it is a plurality of elasticity damping claw is followed auxiliary bearing's circumference interval arrangement.
In some embodiments of the present disclosure, the elastic damping claw includes a first claw portion and a second claw portion arranged at an included angle, and radially outer end surfaces of the first claw portion and the second claw portion are located on the same cylindrical surface.
In some embodiments of the present disclosure, in the same elastic vibration-damping claw, opposite side surfaces of the first claw part and the second claw part are transitionally connected by a first smooth curved surface; and/or the presence of a gas in the gas,
in the same elastic vibration reduction claw, the side surface of the first claw part departing from the second claw part is in transitional connection with the mounting part through a second smooth curved surface; and/or the presence of a gas in the gas,
in the elastic vibration reduction claw, the side surface of the second claw part, which is far away from the first claw part, is in transitional connection with the mounting part through a third smooth curved surface.
In some embodiments of the present disclosure, a gap is formed between the damping member and the bearing seat, and the gap is less than or equal to 0.05 mm; and/or the presence of a gas in the gas,
the installation department is sleeve structure, sleeve structure with auxiliary bearing's bearing inner race transition fit.
In some embodiments of the present disclosure, the auxiliary bearing includes a bearing outer ring, a bearing inner ring, and balls disposed between the bearing outer ring and the bearing inner ring;
and a self-lubricating coating is arranged on the surface of the bearing outer ring and/or the surface of the bearing inner ring.
In some embodiments of the present disclosure, the material of the self-lubricating coating comprises a metal sulfide.
In some embodiments of the present disclosure, the auxiliary bearing includes a double-row angular contact bearing, which is a symmetrical structure paired face to face, and includes a bearing outer ring, a first bearing inner ring, and a second bearing inner ring;
a first annular flange is arranged on the outer peripheral surface of the first bearing inner ring; the first annular flange is arranged at one end of the first bearing inner ring; a first arc-shaped raceway is arranged between the outer peripheral surface of the first annular flange and the outer peripheral surface of the first bearing inner ring;
the second bearing inner ring is provided with a second annular flange and a second arc-shaped raceway which are symmetrical to the first bearing inner ring;
a third annular flange and a fourth annular flange are arranged on the inner circumferential surface of the bearing outer ring; the third annular flange and the fourth annular flange are respectively and integrally arranged at two ends of the bearing outer ring; a third arc-shaped raceway and a fourth arc-shaped raceway are arranged between the inner circumferential surfaces of the third annular flange and the fourth annular flange and the inner circumferential surface of the bearing outer ring respectively;
the first arc-shaped rolling way and the third arc-shaped rolling way are partially staggered in the axial direction, and the first arc-shaped rolling way and the third arc-shaped rolling way are matched to clamp a first ball; the second arc-shaped rolling way and the fourth arc-shaped rolling way are arranged in a partially staggered mode in the axial direction, and the second arc-shaped rolling way and the fourth arc-shaped rolling way are matched to clamp a second ball.
The second aspect of the present disclosure provides a manufacturing method of an auxiliary bearing, where the auxiliary bearing is applied to an auxiliary support structure for the magnetic levitation motor, the auxiliary bearing includes a bearing outer ring and a bearing inner ring, and the manufacturing method of the auxiliary bearing includes:
providing an initial bearing outer ring and/or an initial bearing inner ring;
and carrying out ion sulfurization treatment on the surface of the initial bearing outer ring and/or the initial bearing inner ring to obtain the bearing outer ring and/or the bearing inner ring.
In some embodiments of the present disclosure, the subjecting of the surface of the initial bearing outer ring and/or the initial bearing inner ring to an ion sulfurization treatment includes:
placing an initial bearing outer ring and/or an initial bearing inner ring in a sulfurizing furnace body, and contacting the initial bearing outer ring and/or the initial bearing inner ring with a cathode in the sulfurizing furnace body, wherein the furnace wall of the sulfurizing furnace body is connected with an anode;
carrying out vacuum pumping treatment on the sulfurizing furnace body;
applying a pulsed voltage between the cathode and the anode;
introducing H into the sulfurizing furnace body 2 ；
Heating the sulfurizing furnace body to a first preset temperature for a first preset time;
introducing H into the sulfurizing furnace body 2 S and inert gas, which lasts for a second preset time at a first preset temperature;
and reducing the temperature of the sulfurizing furnace body to a second preset temperature so as to form a self-lubricating coating on the surface of the initial bearing outer ring and/or the surface of the initial bearing inner ring.
In some embodiments of the present disclosure, the first preset time period is 5-15 min; and/or the presence of a gas in the gas,
the second preset time is 2-3 h; and/or the presence of a gas in the gas,
the first preset temperature is 185-200 ℃; and/or the presence of a gas in the gas,
the second preset temperature is 40-60 ℃.
The embodiment of the disclosure provides an auxiliary supporting structure for a magnetic levitation motor, which has the following beneficial effects: the vibration damping part of the vibration damping part comprises a plurality of elastic vibration damping claws which are arranged at intervals along the circumferential direction of the auxiliary bearing, so that when the magnetic suspension motor falls, the elastic vibration damping claws generate elastic deformation, the elastic vibration damping claws balance stress and buffer impact force together, and therefore, enough damping support can be provided for the auxiliary bearing; in addition, because a plurality of elastic vibration reduction claws are stressed in a balanced manner, when the magnetic suspension motor falls, the damage of impact acting force to the single elastic vibration reduction claw is low, and the structural reliability of the elastic vibration reduction claw is ensured. In addition, acting forces between the mounting part and the elastic vibration damping claw and between the mounting part and the auxiliary bearing are buffered, so that the mounting part can realize the mounting of the vibration damping piece on one hand, and can also secondarily buffer the impact acting force reaching the auxiliary bearing, thereby further improving the vibration damping effect.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the embodiments of the disclosure. In the drawings, like reference numerals are used to indicate like elements. The drawings in the following description are directed to some, but not all embodiments of the disclosure. For a person skilled in the art, other figures can be derived from these figures without inventive effort.
Fig. 1 is a schematic structural view of an auxiliary support structure for a magnetic levitation motor shown in the present disclosure;
fig. 2 is a perspective structural view of a vibration damping member in an auxiliary support structure for a magnetic levitation motor shown in the present disclosure;
fig. 3 is a top view of an auxiliary support structure for a magnetic levitation motor shown in the present disclosure with respect to a vibration damping member;
fig. 4 is a schematic structural view of an auxiliary bearing in an auxiliary support structure for a magnetic levitation motor shown in the present disclosure;
fig. 5 is a flowchart of a method for manufacturing an auxiliary bearing according to the present disclosure.
In the figure, 1, a bearing seat; 2. an auxiliary bearing; 210. a bearing outer race; 220. a bearing inner race; 221. a first bearing inner race; 222. a second bearing inner race; 230. a ball bearing; 231. a first ball bearing; 232. a second ball bearing; 3. a rotor; 4. a vibration damping member; 410. an installation part; 420. a vibration damping section; 421. an elastic vibration damping claw; 421a, a first claw part; 421b, a second claw part; 5. a first smooth curved surface; 6. a second smooth curved surface; 7. a third smooth curved surface; 8. a self-lubricating coating; 9. a first annular rib; 10. a first arcuate raceway; 11. a second annular rib; 12. a second arc-shaped raceway; 13. a third annular rib; 14. a third arc-shaped raceway; 15. a fourth annular flange; 16. a fourth arc-shaped raceway; 17. a speed sensor; 18. an end cap; 19. and (4) bolts.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be described clearly and completely with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are some embodiments of the present disclosure, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure. It should be noted that, in the present disclosure, the embodiments and the features of the embodiments may be arbitrarily combined with each other without conflict.
For a horizontal magnetic bearing system, the working rotating speed of a rotor is more than 30000r/min, and under the action of gravity, when the rotor of a magnetic suspension motor falls at a high speed, the downward radial impact force of the rotor is several times that of the whole shaft system, so that the common auxiliary bearing can be damaged in different degrees when falling.
In the related art, a bellows for buffering energy absorption may be provided between the auxiliary bearing and the bearing housing. In the auxiliary supporting structure for the magnetic suspension motor, the damping support is provided for the auxiliary bearing through the corrugated pipe, but the damping support provided by the corrugated pipe has the problem of obvious insufficient rigidity, when the magnetic suspension motor falls, the radial impact force on a rotor is large, the corrugated pipe is insufficient to provide sufficient damping support, and if the corrugated pipe generates large deformation, the protection effect on the auxiliary bearing is lost.
In order to solve the technical problem, an exemplary embodiment of the present disclosure provides an auxiliary support structure for a magnetic levitation motor, and the problem of damage to an auxiliary bearing when a rotor of the magnetic levitation motor falls is solved by using a vibration damping part and an installation part in a vibration damping part in a matching manner.
The auxiliary support structure for a magnetic levitation motor provided by the invention is described in detail below with reference to the accompanying drawings.
An exemplary embodiment of the present disclosure provides an auxiliary supporting structure for a magnetic levitation motor, as shown in fig. 1, including a bearing seat 1, an auxiliary bearing 2 and a vibration damping member 4, wherein the auxiliary bearing 2 is disposed in the bearing seat 1 and sleeved on a rotor 3; the damping member 4 is disposed between the bearing housing 1 and the auxiliary bearing 2, as shown in fig. 2 and 3, the damping member 4 includes a mounting portion 410 and a damping portion 420, the mounting portion 410 is mounted on the outer side of the auxiliary bearing 2, the damping portion 420 includes a plurality of elastic damping claws 421 connected to the radial outer side of the mounting portion 410, and the plurality of elastic damping claws 421 are arranged at intervals in the circumferential direction of the auxiliary bearing 2.
In this embodiment, as shown in fig. 1, the vibration damping member 4 is connected to the auxiliary bearing 2 through the mounting portion 410 in a matching manner, when the magnetic levitation motor falls, the impact force generated by the magnetic levitation motor is buffered by the vibration damping portion 420, and when the buffered impact force reaches the mounting portion 410, the impact force is lower than the minimum critical value that can damage the auxiliary bearing 2, and the impact force at this time cannot damage the auxiliary bearing 2, and further, the impact force reaching the auxiliary bearing 2 is extremely small through further buffering of the mounting portion 410. In some embodiments, as shown in fig. 3, the damping function of the damping portion 420 is achieved by a plurality of elastic damping claws 421 disposed at the radially outer side of the mounting portion 410, and when an impact force is applied to the elastic damping claws 421, the elastic damping claws 421 are elastically deformed in spaced areas, and the impact force is damped by the elastic deformation of the elastic damping claws 421.
The cooperation through damping portion 420 and installation department 410 in damping piece 4 is used, when having solved magnetic levitation motor and falling, causes the problem of harm to auxiliary bearing 2: when the magnetic suspension motor falls, the elastic vibration reduction claws 421 generate elastic deformation, and the elastic vibration reduction claws 421 balance stress and buffer impact force together, so that sufficient damping support can be provided for the auxiliary bearing 2; in addition, because the elastic vibration reduction claws 421 are stressed in a balanced manner, when the magnetic suspension motor falls, the damage of impact acting force on the single elastic vibration reduction claw 421 is low, and therefore the structural reliability of the elastic vibration reduction claw 421 is ensured. In addition, acting forces between the mounting portion 410 and the elastic damping claws 421 and between the mounting portion 410 and the auxiliary bearing 2 are buffered, so that the mounting portion 410 can realize the mounting of the damping piece 4 on one hand; on the other hand, the impact acting force reaching the auxiliary bearing 2 can be buffered for the second time, so that the vibration damping effect is further improved.
In an exemplary embodiment of the present disclosure, as shown in fig. 2 and 3, the elastic vibration reduction claw 421 includes a first claw portion 421a and a second claw portion 421b arranged at an included angle, and the radial outer end surfaces of the first claw portion 421a and the second claw portion 421b are located on the same cylindrical surface. When the rotor 3 of the magnetic levitation motor falls, the impact force transmitted to the vibration damping part 420 is transmitted in all directions, and the impact force F1 in the radial direction of the axis of the mounting part 410 can be counteracted together by the first claw part 421a and the second claw part 421b facing different directions; on the other hand, the impact forces in the radial directions are borne by the first nail portion 421a and the second nail portion 421b, and as shown in fig. 3, the first impact force F3 in the direction substantially the same as the extending direction of the first nail portion 421a mainly bears the damping action by the first nail portion 421a, and the second impact force F2 in the direction substantially the same as the extending direction of the second nail portion 421b mainly bears the damping action by the second nail portion 421 b.
Illustratively, as shown in fig. 3, in the same elastic vibration-damping claw 421, the first claw portion 421a and the second claw portion 421b are symmetrically arranged with respect to a symmetry axis, the symmetry axis passes through an axis of the auxiliary bearing 2, a first included angle θ 1 is formed between a side surface of the first claw portion 421a close to the second claw portion 421b and the symmetry axis, a second included angle θ 2 is formed between a side surface of the first claw portion 421a away from the second claw portion 421b and the symmetry axis, and the first included angle θ 1 is smaller than the second included angle θ 2, so that a contact area between the bearing seat 1 and the first claw portion 421a and the second claw portion 421b is increased, and a spacing gap between the first claw portion 421a and the second claw portion 421b is increased, that is, deformation regions of the first claw portion 421a and the second claw portion 421b are increased as much as possible, thereby improving a buffering effect of the elastic vibration-damping claw 421 on impact force.
In an exemplary embodiment of the present disclosure, as shown in fig. 3, in the same elastic damping claw 421, the opposite side surfaces of the first claw portion 421a and the second claw portion 421b are transitionally connected by the first smooth curved surface 5; the first smooth curved surface 5 is designed to achieve good stability and safety when the first claw portion 421a and the second claw portion 421b deform relative to the mounting portion 410, and the first claw portion 421a and the second claw portion 421b are less prone to breaking when deforming relative to straight corner connection; in the same elastic vibration-damping claw 421, the side surface of the first claw 421a departing from the second claw 421b is transitionally connected with the mounting portion 410 through the second smooth curved surface 6, and the side surface of the second claw 421b departing from the first claw 421a is transitionally connected with the mounting portion 410 through the third smooth curved surface 7.
The auxiliary supporting structure in the related art, the gap width between the corrugated pipe and the bearing seat 1 is usually 0.15-0.20mm, the purpose is to provide an additional deformation buffer space through the gap, but the arrangement causes the buffer vibration damping effect of the corrugated pipe to be greatly reduced, in the falling process, the inner hole of the bearing seat 1 can generate certain deformation, the deformed bearing seat 1 transmits the residual impact force to the corrugated pipe, therefore, the buffer vibration damping effect which can be realized by the corrugated pipe is smaller, the protection effect on the auxiliary bearing 2 is poorer, and the gap of the width also provides a larger vibration space for the auxiliary bearing 2, so the corrugated pipe in the related art can not well protect the auxiliary bearing 2. In an exemplary embodiment of the present disclosure, a gap (not shown) is formed between the damping member 4 and the bearing seat 1, and the gap is configured to facilitate the movable detachment and installation of the damping member 4, in the present disclosure, the width of the gap is less than or equal to 0.05mm, that is, the damping member 4 is approximately attached to the bearing seat 1, and in a falling process of the magnetic levitation motor, most of the generated impact force can be transmitted to the damping member 4 to achieve buffering, and meanwhile, the problem that the auxiliary bearing 2 generates vibration is also solved; in addition, the mounting portion 410 has a sleeve structure, and the sleeve structure is in transition fit with the bearing outer ring 210 of the auxiliary bearing 2.
Illustratively, the sleeve structure and the outer ring of the auxiliary bearing 2 are in interference fit or clearance fit, and the installation mode of the interference fit can ensure the fit tightness of the vibration damping piece 4 and the auxiliary bearing 2, so that the problem that the auxiliary bearing 2 vibrates in the falling process of the magnetic suspension motor is solved; the installation mode of clearance fit can guarantee the detachability of damping piece 4 and auxiliary bearing 2, makes things convenient for the change of damping piece 4.
In an exemplary embodiment of the present disclosure, as shown in fig. 4, the auxiliary bearing 2 includes a bearing outer race 210, a bearing inner race 220, and balls 230 disposed between the bearing outer race 210 and the bearing inner race 220; the surface of the bearing outer ring 210 and/or the surface of the bearing inner ring 220 are/is provided with a self-lubricating coating 8, and the friction force between the balls 230 and the bearing outer ring 210 and the bearing inner ring 220 is reduced through the self-lubricating coating 8 so as to adapt to the high rotating speed performance required by the auxiliary bearing 2 in the operation process of the magnetic suspension motor; the problem that the service life of a bearing is influenced by large heat generated by friction when the magnetic suspension motor runs for a long time is solved.
Exemplarily, as shown in fig. 1, a speed sensor 17 and an end cover 18 are sequentially sleeved outside a rotor 3 of a magnetic levitation motor, and a gap is left between the speed sensor 17 and the end cover 18; the speed sensor 17 can synchronously rotate along with the rotor 3, and the speed sensor 17 can press the bearing inner ring 220 to prevent the bearing inner ring 220 from loosening while positioning the eccentric load of the rotor 3 in real time; the end cover 18 is used for compressing and limiting the bearing outer ring 210 and the damping piece 4, and preventing the bearing outer ring 210 and the damping piece 4 from loosening.
In some embodiments, the speed sensor 17 may be removably mounted to the rotor 3 by bolts 19 for synchronous rotation with the rotor 3.
In an exemplary embodiment of the present disclosure, the material of the self-lubricating coating 8 includes a metal sulfide, which may include FeS, and the self-lubricating coating 8 provided by the present disclosure may utilize the metal of the bearing outer ring 210 and the bearing inner ring 220, and H 2 S is combined to generate metal sulfide, and the prepared self-lubricating coating 8 has a good lubricating effect, can reduce process steps and improve process efficiency.
In an exemplary embodiment of the present disclosure, as shown in fig. 4, the auxiliary bearing 2 includes a double-row angular contact bearing, which is a symmetrical structure of face-to-face pairing and includes a bearing outer ring 210, a first bearing inner ring 221, and a second bearing inner ring 222; a first annular rib 9 is arranged on the outer peripheral surface of the first bearing inner ring 221; the first annular rib 9 is arranged at one end of the first bearing inner ring 221; a first arc-shaped raceway 10 is arranged between the outer peripheral surface of the first annular rib 9 and the outer peripheral surface of the first bearing inner ring 221; the second bearing inner ring 222 is provided with a second annular rib 11 and a second arc-shaped raceway 12 which are symmetrical to the first bearing inner ring 221; the inner circumferential surface of the bearing outer ring 210 is provided with a third annular flange 13 and a fourth annular flange 15; the third annular flange 13 and the fourth annular flange 15 are respectively and integrally arranged at two ends of the bearing outer ring 210; a third arc-shaped raceway 14 and a fourth arc-shaped raceway 16 are respectively arranged between the inner circumferential surfaces of the third annular rib 13 and the fourth annular rib 15 and the inner circumferential surface of the bearing outer ring 210; the first arc-shaped raceway 10 and the third arc-shaped raceway 14 are partially staggered in the axial direction and are used for cooperatively clamping the first ball 231; the second arc-shaped raceway 12 and the fourth arc-shaped raceway 16 are partially staggered in the axial direction and are used for cooperatively clamping a second ball 232; the two sides of the first ball 231 are limited through the first annular rib 9 and the third annular rib 13, the two sides of the second ball 232 are limited through the second annular rib 11 and the fourth annular rib 15, and the stability of the first ball 231 and the second ball 232 in the high-speed running process of the rotor 3 is ensured; in addition, the contact areas of the first ball 231, the first arc-shaped raceway 10 and the third arc-shaped raceway 14 and the contact areas of the second ball 232, the second arc-shaped raceway 12 and the fourth arc-shaped raceway 16 are reduced by 10-20% compared with the prior art, so that the friction force and the heat generated by friction can be effectively reduced, and the service life of the bearing is prolonged.
The present disclosure also provides a manufacturing method of an auxiliary bearing, where the auxiliary bearing is applied to the auxiliary support structure for the magnetic levitation motor, as shown in fig. 1, the auxiliary bearing 2 includes a bearing outer ring 210 and a bearing inner ring 220, as shown in fig. 5, the manufacturing method of the auxiliary bearing includes:
s100: an initial bearing outer race and/or an initial bearing inner race is provided.
S200: and carrying out ion sulfurization treatment on the surface of the initial bearing outer ring and/or the surface of the initial bearing inner ring to obtain the bearing outer ring and the bearing inner ring.
Self-lubricating coating 8 can be formed on the surfaces of the bearing outer ring 210 and the bearing inner ring 220 through ion sulfurization treatment, so that the friction force between the balls 230 and the bearing outer ring 210 and the bearing inner ring 220 can be reduced, the high rotating speed performance required by the auxiliary bearing 2 in the operation process of the magnetic suspension motor is adapted, and the problems of large heat generated by friction and influence on the service life of the bearing when the magnetic suspension motor is operated for a long time are solved.
For example, ion sulfurization treatment may be performed on the surface of the ball 230 to obtain the bearing outer ring 210, the bearing inner ring 220 and the ball 230, and the self-lubricating coating 8 is formed on the surface of the bearing outer ring 210 and the surface of the bearing inner ring 220, and further the self-lubricating coating 8 is formed on the surface of the ball 230, so that the friction force between the ball 230 and the bearing inner ring 220 and the bearing outer ring 210 can be further reduced, the high rotation speed performance is satisfied, and the problem of frictional heat generation is alleviated.
In an exemplary embodiment of the present disclosure, S200 includes the steps of:
s210: and placing the initial bearing outer ring and/or the initial bearing inner ring in the sulfurizing furnace body, and contacting the initial bearing outer ring and/or the initial bearing inner ring with a cathode in the sulfurizing furnace body, wherein the furnace wall of the sulfurizing furnace body is connected with an anode.
S220: and carrying out vacuum pumping treatment on the sulfurizing furnace body.
S230: a pulsed voltage is applied between the cathode and the anode.
S240: introducing H into the sulfurizing furnace body 2 。
S250: and heating the sulfurizing furnace body to a first preset temperature for a first preset time.
S260: introducing H into the sulfurizing furnace body 2 S and inert gas, which is kept at the first preset temperature for a second preset time.
S270: and reducing the temperature of the sulfurizing furnace body to a second preset temperature so as to form a self-lubricating coating on the surface of the initial bearing outer ring 210 and/or the surface of the initial bearing inner ring.
Exemplarily, the vacuum degree of the sulfurizing furnace body after the vacuum pumping treatment is controlled to be 5-15Pa, the pulse voltage between the cathode and the anode is controlled to be 500-680V, and the liquid CS can be used 2 Instead of liquid H 2 S is used as a sulfur infiltration source.
In an exemplary embodiment of the disclosure, the first preset time period is 5-15 min; the second preset time is 2-3 h; the first preset temperature is 185-200 ℃; the second preset temperature is 40-60 ℃.
For example, the first preset time period may be 10min, the second preset time period may be 2.5h, the first preset temperature may be 190 ℃, and the second preset temperature may be 50 ℃.
The embodiments or implementation modes in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
In the description herein, references to the terms "embodiment," "exemplary embodiment," "some embodiments," "illustrative embodiments," "example" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the disclosure.
In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and operate, and thus, should not be construed as limiting the present disclosure.
It will be understood that the terms "first," "second," and the like as used in this disclosure may be used in the present disclosure to describe various structures, but these structures are not limited by these terms. These terms are only used to distinguish one structure from another.
Like elements in one or more of the drawings are referred to by like reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale. Moreover, certain well-known elements may not be shown. For the sake of simplicity, the structure obtained after several steps can be described in one figure. Numerous specific details of the present disclosure, such as structure, materials, dimensions, processing techniques and techniques of the devices, are set forth in the following description in order to provide a more thorough understanding of the present disclosure. However, as will be understood by those skilled in the art, the present disclosure may be practiced without these specific details.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present disclosure, and not for limiting the same; while the present disclosure has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present disclosure.

Claims (10)

1. An auxiliary support structure for a magnetic levitation motor for auxiliary support of a rotor (3) of the magnetic levitation motor, comprising:
a bearing seat (1);
the auxiliary bearing (2) is arranged in the bearing seat (1) and sleeved on the rotor (3);
damping piece (4), set up in bearing frame (1) with between auxiliary bearing (2), damping piece (4) are including installation department (410) and damping portion (420), installation department (410) install in the outside of auxiliary bearing (2), damping portion (420) including a plurality of with elastic damping claw (421) that the radial outside of installation department (410) links to each other, it is a plurality of elastic damping claw (421) are followed the circumference interval arrangement of auxiliary bearing (2).
2. The auxiliary support structure for the magnetic levitation motor as recited in claim 1, wherein the elastic vibration reduction claw (421) comprises a first claw part (421a) and a second claw part (421b) which are arranged at an included angle, and the radial outer end surfaces of the first claw part (421a) and the second claw part (421b) are located on the same cylindrical surface.
3. The auxiliary support structure for a magnetic levitation motor according to claim 2, wherein in the same elastic damping claw (421), the opposite sides of the first claw part (421a) and the second claw part (421b) are transitionally connected by a first smooth curved surface (5); and/or the presence of a gas in the gas,
in the elastic vibration reduction claw (421), the side surface of the first claw part (421a) departing from the second claw part (421b) is in transition connection with the mounting part (410) through a second smooth curved surface (6); and/or the presence of a gas in the gas,
in the elastic vibration reduction claw (421), the side surface of the second claw part (421b) departing from the first claw part (421a) is in transition connection with the mounting part (410) through a third smooth curved surface (7).
4. Auxiliary support structure for a magnetic levitation motor according to any of claims 1 to 3, wherein there is a gap between the damping member (4) and the bearing housing (1), said gap being less than or equal to 0.05 mm; and/or the presence of a gas in the gas,
installation department (410) are the sleeve structure, the sleeve structure with bearing inner race (210) transition fit of auxiliary bearing (2).
5. Auxiliary support structure for a magnetic levitation motor according to any of claims 1 to 3, wherein the auxiliary bearing (2) comprises an outer bearing ring (210), an inner bearing ring (220) and balls (230) arranged between the outer bearing ring (210) and the inner bearing ring (220);
the surface of the bearing outer ring (210) and/or the surface of the bearing inner ring (220) are/is provided with a self-lubricating coating (8).
6. Auxiliary support structure for magnetic levitation motors according to claim 5, characterised in that the material of the self-lubricating coating (8) comprises a metal sulphide.
7. Auxiliary support structure for a magnetic levitation motor according to any of claims 1 to 3, wherein the auxiliary bearing (2) comprises a double row angular contact bearing, which is a symmetrical structure in face-to-face pairing comprising a bearing outer ring (210), a first bearing inner ring (221) and a second bearing inner ring (222);
a first annular rib (9) is arranged on the outer peripheral surface of the first bearing inner ring (221); the first annular rib (9) is arranged at one end of the first bearing inner ring (221); a first arc-shaped raceway (10) is arranged between the outer peripheral surface of the first annular rib (9) and the outer peripheral surface of the first bearing inner ring (221);
the second bearing inner ring (222) is provided with a second annular rib (11) and a second arc-shaped raceway (12) which are symmetrical to the first bearing inner ring (221);
a third annular rib (13) and a fourth annular rib (15) are arranged on the inner circumferential surface of the bearing outer ring (210); the third annular flange (13) and the fourth annular flange (15) are respectively and integrally arranged at two ends of the bearing outer ring (210); a third arc-shaped raceway (14) and a fourth arc-shaped raceway (16) are respectively arranged between the inner circumferential surfaces of the third annular rib (13) and the fourth annular rib (15) and the inner circumferential surface of the bearing outer ring (210);
the first arc-shaped raceway (10) and the third arc-shaped raceway (14) are arranged in a partially staggered manner in the axial direction, and the first arc-shaped raceway (10) and the third arc-shaped raceway (14) are matched to clamp a first ball (231); the second arc-shaped raceway (12) and the fourth arc-shaped raceway (16) are arranged in a partially staggered mode in the axial direction, and the second arc-shaped raceway (12) and the fourth arc-shaped raceway (16) are matched to clamp a second ball (232).
8. A method for manufacturing an auxiliary bearing applied to an auxiliary support structure for a magnetic levitation motor as recited in any one of claims 1 to 7, the auxiliary bearing comprising a bearing outer ring and a bearing inner ring, the method comprising:
providing an initial bearing outer ring and/or an initial bearing inner ring;
and carrying out ion sulfurization treatment on the surface of the initial bearing outer ring and/or the initial bearing inner ring to obtain the bearing outer ring and/or the bearing inner ring.
9. The method for manufacturing an auxiliary bearing according to claim 8, wherein the step of subjecting the surface of the initial bearing outer ring and/or the initial bearing inner ring to ion sulfurization comprises:
placing an initial bearing outer ring and/or an initial bearing inner ring in a sulfurizing furnace body, and contacting the initial bearing outer ring and/or the initial bearing inner ring with a cathode in the sulfurizing furnace body, wherein the furnace wall of the sulfurizing furnace body is connected with an anode;
carrying out vacuum pumping treatment on the sulfurizing furnace body;
applying a pulsed voltage between the cathode and the anode;
introducing H into the sulfurizing furnace body 2 ；
Heating the sulfurizing furnace body to a first preset temperature for a first preset time;
introducing H into the sulfurizing furnace body 2 S and inert gas, which lasts for a second preset time at a first preset temperature;
and reducing the temperature of the sulfurizing furnace body to a second preset temperature so as to form a self-lubricating coating on the surface of the initial bearing outer ring and/or the surface of the initial bearing inner ring.
10. The method for manufacturing the auxiliary bearing according to claim 9, wherein the first preset time period is 5-15 min; and/or the presence of a gas in the gas,
the second preset time is 2-3 h; and/or the presence of a gas in the gas,
the first preset temperature is 185-200 ℃; and/or the presence of a gas in the gas,
the second preset temperature is 40-60 ℃.
CN202210888122.3A 2022-07-27 2022-07-27 Auxiliary supporting structure for magnetic suspension motor and manufacturing method of auxiliary bearing Pending CN115076230A (en)

Priority Applications (1)

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CN202210888122.3A CN115076230A (en) 2022-07-27 2022-07-27 Auxiliary supporting structure for magnetic suspension motor and manufacturing method of auxiliary bearing

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CN202210888122.3A CN115076230A (en) 2022-07-27 2022-07-27 Auxiliary supporting structure for magnetic suspension motor and manufacturing method of auxiliary bearing

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09296838A (en) * 1996-03-06 1997-11-18 Aisin Seiki Co Ltd Elastic supporting device
JP2003004099A (en) * 2001-06-20 2003-01-08 Denso Corp Vibration absorption type fixing device
CN2627276Y (en) * 2003-07-30 2004-07-21 北京金东方科技发展有限公司 Combination rolling motion pilot bearing
CN101187405A (en) * 2007-12-24 2008-05-28 南京航空航天大学 Centripetal protection bearing for magnetic levitation bearing system
CN101956155A (en) * 2010-09-30 2011-01-26 北京天马轴承有限公司 Gas plasma sulfurizing process
CN102505106A (en) * 2011-12-30 2012-06-20 瓦房店轴承集团有限责任公司 Surface treatment process for wind power generation spindle bearing
JP2012219899A (en) * 2011-04-07 2012-11-12 Bridgestone Corp Vibration control device
CN103836080A (en) * 2012-11-23 2014-06-04 北京奇峰聚能科技有限公司 Composite magnetic levitation protective bearing system

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09296838A (en) * 1996-03-06 1997-11-18 Aisin Seiki Co Ltd Elastic supporting device
JP2003004099A (en) * 2001-06-20 2003-01-08 Denso Corp Vibration absorption type fixing device
CN2627276Y (en) * 2003-07-30 2004-07-21 北京金东方科技发展有限公司 Combination rolling motion pilot bearing
CN101187405A (en) * 2007-12-24 2008-05-28 南京航空航天大学 Centripetal protection bearing for magnetic levitation bearing system
CN101956155A (en) * 2010-09-30 2011-01-26 北京天马轴承有限公司 Gas plasma sulfurizing process
JP2012219899A (en) * 2011-04-07 2012-11-12 Bridgestone Corp Vibration control device
CN102505106A (en) * 2011-12-30 2012-06-20 瓦房店轴承集团有限责任公司 Surface treatment process for wind power generation spindle bearing
CN103836080A (en) * 2012-11-23 2014-06-04 北京奇峰聚能科技有限公司 Composite magnetic levitation protective bearing system

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Application publication date: 20220920