CN114198395A - Bearing structure and motor with same - Google Patents
Bearing structure and motor with same Download PDFInfo
- Publication number
- CN114198395A CN114198395A CN202111502223.4A CN202111502223A CN114198395A CN 114198395 A CN114198395 A CN 114198395A CN 202111502223 A CN202111502223 A CN 202111502223A CN 114198395 A CN114198395 A CN 114198395A
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- bearing
- outer ring
- ring
- support frame
- support
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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
- 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
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
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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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
- F16C19/522—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to load on the bearing, e.g. bearings with load sensors or means to protect the bearing against overload
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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
- F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
- F16C23/06—Ball or roller bearings
- F16C23/08—Ball or roller bearings self-adjusting
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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
- 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
- F16C33/581—Raceways; Race rings integral with other parts, e.g. with housings or machine elements such as shafts or gear wheels
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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
- 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
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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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
- F16C33/7806—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for spherical roller 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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
- F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
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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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
- F16C33/783—Details of the sealing or parts thereof, e.g. geometry, material of the mounting region
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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
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7886—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race
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- 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
- H02K5/1732—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 radially supporting the rotary shaft at both ends of the rotor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/083—Structural association with bearings radially supporting the rotary shaft at both ends of the rotor
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The application provides a bearing structure and a motor with the same, wherein the bearing structure comprises a bearing inner ring, a bearing outer ring, a rotating structure and a supporting structure, wherein the rotating structure is arranged between the bearing inner ring and the bearing outer ring; the supporting structure can support the bearing outer ring, so that a gap between the bearing outer ring and the rotating structure is within a first preset gap range; and/or the support structure can support the second bearing inner ring so that the clearance between the bearing inner ring and the rotating structure is within a preset clearance range. According to the bearing structure and the motor with the bearing structure, the bearing locking and the sweeping boring fault can be effectively prevented.
Description
Technical Field
The application belongs to the technical field of motors, and particularly relates to a bearing structure and a motor with the same.
Background
At present, the lubricating quality of grease can be reduced and the smoothness of the surfaces of balls can be corroded in a motor in a severe production environment (such as a salt field, a smelting working environment and the like), semi-dry friction or oil-free lubrication dry friction is caused in an inner race track and an outer race track due to oil shortage of the balls, high temperature is generated to change the hardness of a metal structure of the balls, abrasion and burning deformation are caused, the deformed balls cannot fix the rotation stability of a rotor in a bearing structure race, axial displacement and radial runout deviation of the rotor are generated, the rotation precision of the rotor cannot be fixed, the fit clearance between the rotor and a stator is changed, and the rotor directly touches the stator to scrape and sweep the stator. The long-term overload operation can make motor gear or rim plate drive increase the resistance (the gravity of object and motor drive power looks thixotropy are the resistance), cause the bearing structure atress of the fixed rotor of motor uneven, and the bearing structure ball weares and decreases the aggravation in the lasso, causes the clearance grow to produce the rotor shaft radial deflection and has also changed the rotor simultaneously with the fit clearance of stator, the steady output of direct influence motor power. The motor is worn and burned out due to the bearing structure during operation, the stator coil is scraped by the rotor, the fault of the boring and sweeping machine is caused, and the problems of motor shaft noise, service life and the like are also influenced. The motor transported to foreign countries needs to be transported to a customer site in a sea transportation and road transportation mode, however, after the transportation of the sea and the sea, more projects have abnormal sound, locking and sweeping faults of a bearing structure at the end part of the motor, and the matching operation of the motor and the load performance of customers is seriously influenced.
Therefore, how to provide a bearing structure capable of effectively preventing bearing locking and bore sweeping faults and a motor with the bearing structure become problems which need to be solved by the technical personnel in the field.
Disclosure of Invention
Therefore, the technical problem to be solved by the application is to provide a bearing structure and a motor with the same, which can effectively prevent bearing locking and bore sweeping faults.
In order to solve the above problem, the present application provides a bearing structure including:
a bearing inner race;
a bearing outer race;
the rotating structure is arranged between the bearing inner ring and the bearing outer ring;
the supporting structure can support the bearing outer ring, so that a gap between the bearing outer ring and the rotating structure is within a first preset gap range; and/or the support structure can support the bearing inner ring so that the clearance between the bearing inner ring and the rotating structure is within a second preset clearance range.
Further, the support structure includes a support frame including a radially extending portion extending from the bearing inner race to the bearing outer race.
Furthermore, on the longitudinal section of the bearing structure, the support frame is of a C-shaped structure facing the rotating structure.
Further, the support frame also comprises an axial extension part which is arranged at the end part of the radial extension part; the axial extension is arranged inside the bearing inner ring and/or inside the bearing outer ring.
Further, when the axially extending portion is provided inside the bearing inner race, the axially extending portion is located on an inner peripheral side of the rotary structure;
and/or when the axial extension part is arranged in the bearing outer ring, the axial extension part is positioned on the outer peripheral side of the rotating structure.
Furthermore, the supporting structure further comprises an elastic structure, the elastic structure is arranged between the supporting frame and the bearing inner ring, and/or the elastic structure is arranged between the supporting frame and the bearing outer ring.
Furthermore, the supporting structure comprises a sealing cover, the sealing cover is positioned at the axial end parts of the bearing outer ring and the bearing inner ring, and the sealing cover is arranged between the bearing outer ring and the bearing inner ring in a covering mode; the sealing cover forms an elastic structure; the support frame is arranged in the sealing cover.
Further, the bearing outer ring and the axial end part of the bearing inner ring are both provided with mounting grooves, and the sealing cover is arranged in the mounting grooves.
Further, the outer periphery side of the bearing outer ring is provided with a concave-convex structure, and the concave-convex structure can be matched with the bearing chamber in a concave-convex mode.
According to a further aspect of the present application, there is provided an electric machine comprising a bearing structure as described above.
The application provides a bearing arrangement and have its motor, this application supports bearing inner race and/or bearing inner race through bearing arrangement, even when bearing outside atress is uneven or rotating-structure warp, also can ensure the clearance scope between outer lane and the rotating-structure in the bearing, the operation is when the limit range, avoid or reduce the rotating-structure atress, provide the holding power, reduce rotating-structure's atress wearing and tearing, the life-span of bearing is improved, clearance between the outer lane in the automatically regulated bearing. The method and the device can effectively prevent bearing locking and boring sweeping faults.
Drawings
FIG. 1 is a schematic structural view of a bearing structure according to an embodiment of the present application;
fig. 2 is a schematic view of a laminated structure of a motor according to an embodiment of the present application;
FIG. 3 is a schematic structural diagram of a bearing structure according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a bearing structure according to an embodiment of the present application.
The reference numerals are represented as:
1. a bearing outer race; 11. a relief structure; 2. a bearing inner race; 3. a rotating structure; 4. a support structure; 41. a support frame; 42. an elastic structure; 5. mounting grooves; 6. a holder; 71. a bearing outer cover; 72. an inner bearing cover; 73. an end cap; 8. a rotating shaft.
Detailed Description
Referring to fig. 1-4 in combination, a bearing structure includes a bearing inner ring 2, a bearing outer ring 1, a rotating structure 3 and a supporting structure 4, wherein the rotating structure 3 is arranged between the bearing inner ring 2 and the bearing outer ring 1; the support structure 4 can support the bearing outer ring 1, so that the gap between the bearing outer ring 1 and the rotating structure 3 is within a first preset gap range; according to the bearing outer ring support device, the bearing outer ring 1 is supported through the support structure 4, even if the bearing is subjected to uneven external stress or the rotating structure 3 is deformed, the gap range between the bearing outer ring 1 and the rotating structure 3 can be guaranteed, when the bearing is operated in a limit range, the stress of the rotating structure 3 is avoided or reduced, the support force is provided, the stress abrasion of the rotating structure 3 is reduced, the service life of the bearing is prolonged, and the gap between the bearing outer ring 1 and the rotating structure 3 is automatically adjusted; when the bearing is a motor bearing, the position of a rotor shaft can be optimized, the air gap uniformity of a stator and a rotor can be adjusted, the motor locking and boring sweeping faults can be avoided, and the gap range between the bearing inner ring 2 and the rotating structure 3 can be ensured when the motor runs in an overload mode for a long time. The bearing structure further includes a bearing outer cover 71 and a bearing inner cover 72.
And/or the support structure 4 can support the bearing inner ring 2 such that the clearance between the bearing inner ring 2 and the rotating structure 3 is within a second preset clearance range. The rotating structure 3 is a ball, the bearing inner ring 2 is supported by the supporting structure 4, the clearance range between the bearing inner ring 2 and the rotating structure 3 can be ensured under the condition that the rotating structure 3 is deformed or other conditions, and when the rotating structure operates in a limit range, the stress of the rotating structure 3 is avoided or reduced, so that the supporting force is provided, the stress abrasion of the rotating structure 3 is reduced, the service life of the bearing is prolonged, and the clearance between the bearing inner ring and the bearing outer ring is automatically adjusted; when the bearing is a motor bearing, the position of a rotor shaft can be optimized, the air gap between a stator and a rotor is adjusted to be uniform, and the faults of motor locking and bore sweeping are avoided. This application utilizes bearing inner race 1's structure and interior outer lane complex relation, guarantee the long-term steady operation of motor, improve the life-span of motor bearing, avoid the motor locking, sweep trouble such as boring, can effectively solve the motor and work under adverse circumstances or the state of extraordinary load, the bearing life-span reduces, the ball wearing and tearing, bearing atress is uneven in the rotor, lead to ball further wearing and tearing in the bearing, poor stability when the rotor operates, the output of serious influence motor, cause the motor locking seriously for a long time, sweep the trouble of boring.
The application also discloses some embodiments, and bearing structure 4 includes support frame 41, and support frame 41 includes radial extension, and radial extension extends to bearing inner race 1 on the bearing inner race 2, can support bearing inner race 2 and bearing outer race 1 simultaneously. The radial extension extends in a radial direction of the bearing structure. For example, both ends of the radially extending portion abut against the bearing inner ring 2 and the bearing outer ring 1, respectively. Or the two ends of the radial extension part respectively extend to the inside of the bearing inner ring 2 and the inside of the bearing outer ring 1, and the two ends of the radial extension part can play a supporting role. The support frame 41 is a rigid structure.
The present application also discloses embodiments in which the support frame 41 is a C-shaped structure facing the rotating structure 3 in a longitudinal section of the bearing structure. The support frame 41 can limit the working running clearance range of the inner ring and the outer ring of the bearing, automatically adjust the clearance of the inner ring and the outer ring of the bearing, reduce the stress point and the abrasion of a ball, prolong the service life of the bearing, and prevent the motor from locking and sweeping the boring fault.
The present application also discloses embodiments in which the support frame 41 further comprises an axial extension disposed at an end of the radial extension; the axial extension part is arranged inside the bearing inner ring 2 and/or inside the bearing outer ring 1, namely, an inner ring groove body is arranged inside the bearing inner ring 2, an outer ring groove body is arranged inside the bearing outer ring 1, and the axial extension part simultaneously extends into the inner ring groove body and the outer ring groove body.
The present application also discloses embodiments in which, when an axially extending portion is provided inside the bearing inner race 2, the axially extending portion is located on the inner peripheral side of the rotating structure 3; the clearance between the bearing inner ring 2 and the rotating structure 3 can be adjusted more effectively.
And/or when the axial extension part is arranged in the bearing outer ring 1, the axial extension part is positioned on the outer peripheral side of the rotating structure 3, so that the gap between the bearing outer ring 1 and the rotating structure 3 can be more effectively adjusted.
The application also discloses some embodiments, bearing structure 4 still includes elastic construction 42, elastic construction 42 sets up between support frame 41 and bearing inner race 2, elastic construction 42 is made by rubber, cooperation through elastic construction 42 and support frame 41, can make the clearance scope that also can ensure the bearing inner race when the motor is long-term overload operation, when the operation is at limit range, avoid or reduce the ball atress, provide the holding power, reduce ball atress wearing and tearing, improve the life-span of bearing, the clearance of outer race in the automatically regulated bearing.
The application also discloses some embodiments, elastic construction 42 sets up between support frame 41 and bearing inner race 1, and elastic construction 42 is made by rubber, through elastic construction 42 and support frame 41's cooperation, can be so that also can ensure the clearance scope of bearing inner race when the motor is long-term overload operation, when the operation is at limit range, avoid or reduce the ball atress, provide the holding power, reduce ball atress wearing and tearing, improve the life-span of bearing, the clearance of outer race in the automatically regulated bearing.
The application also discloses some embodiments, the supporting structure 4 comprises a sealing cover, the sealing cover is positioned at the axial end parts of the bearing outer ring 1 and the bearing inner ring 2, and the sealing cover is arranged between the bearing outer ring 1 and the bearing inner ring 2 in a covering manner; the sealing cover forms a resilient structure 42; the support frame 41 is disposed inside the sealing cover. When the supporting frame 41 is a C-shaped structure facing the rotating structure 3, the C-shaped structure is disposed inside the sealing cover.
The application also discloses some embodiments, bearing inner race 1 all is provided with mounting groove 5 with the axial tip of bearing inner race 2, and sealed lid sets up in mounting groove 5. The sealing cover comprises a plugging part and a cover body part which are sequentially connected, and the plugging part is plugged between the bearing inner ring 2 and the bearing outer ring 1; the cover body part comprises a cover plate and an annular structure, the annular structure extends around the circumferential direction of the cover plate, and the annular structure is arranged in the mounting groove 5; the support frame 41 is arranged on the cover body part; in a longitudinal section of the bearing structure, the cover portion is a C-shaped cover along which the support frame 41 correspondingly extends. The sealing cover is made of rubber, such as nitrile rubber.
Namely, a C-shaped support frame 41 is added in a sealing cover of a bearing, an elastic structure 42 made of rubber is matched with the C-shaped support frame 41 with a rigid structure, the clearance range of the inner ring and the outer ring of the bearing is kept, the motor normally operates and automatically adjusts, the motor operates under a long-term overload state, a rolling structure contacts with the outer ring, the clearance between the inner ring and the outer ring of the bearing forms a theoretical maximum clearance and a theoretical minimum clearance, a rotor has certain deviation on axial displacement and radial runout, the rubber above the C-shaped support frame 41 is compressed to the limit at the moment, the rubber elastic structure 42 and the C-shaped support frame 41 together act on the outer ring 1 of the bearing to provide supporting force, the theoretical compression limit is kept to continuously operate, the stress size of the balls is avoided or shared and reduced, the abrasion of the balls is reduced, the service life of the balls is prolonged, the service life of the bearing is prolonged, and the normal operation of the motor is ensured, when the motor is halted, the bearing is self-regulated, the gap between the inner ring and the outer ring of the bearing is adjusted, the motor operates normally next time, and the occurrence of locking and boring sweeping faults is avoided.
The bearing structure comprises a bearing inner ring 2, a bearing outer ring 1, a rotating structure 3 and a retainer 6, wherein dust grooves are arranged on two sides to form mounting grooves 5, and a C-shaped support frame 41 is placed in the dust grooves; filling with rubber to form the sealing cover.
The sealing cover is made of materials such as nitrile rubber, the C-shaped supporting frame 41 is added in the sealing cover, and the distance H from the bearing outer ring 1 to the C-shaped supporting frame 41 is designed, namely the thickness of the nitrile rubber between the bearing outer ring and the C-shaped supporting frame 41. h is the compression amount of the rubber, the compression rate P is controlled within 25%, and the rubber can recover the free height in a free state to keep the elasticity of the rubber. The working pressure provided for the rubber in the bearing when the motor operates is F, the cross-sectional area of the rubber is S, and the unit elasticity of the rubber is q; the relationship among the three is as follows: f ═ S × q.
Determining a compression ratio P according to the unit pressure q, designing H as H to be not more than b, calculating H, and ensuring that when the distance between the ball and the outer ring of the rotating shaft 8 (namely b is more than 0 in the figure) or the ball is about to contact with the outer ring of the rotating shaft when the motor runs, the rubber distance H from the bearing outer ring 1 to the C-shaped support frame 41 reaches a designed specified compression amount H, further compression deformation cannot be realized, and the C-shaped support frame 41 and the non-deformable nitrile rubber act on the bearing outer ring 1 together. The stress area and the supporting point of the bearing outer ring 1 are increased, the stress abrasion of bearing balls is avoided or reduced, and the gap of the outer ring of the bearing inner ring 2 is in a reasonable range when the motor runs under an overload condition, so that the rotor runs stably relatively. And the motor is suspended, the nitrile rubber restores the gap of the outer ring of the bearing inner ring 2 to automatically adjust, the axial radial displacement of the rotor shaft is restored, the air gap between the stator and the rotor is adjusted to keep relatively uniform, and stable power is output. The balance of the thickness of the nitrile rubber and the like at other positions in the sealing cover is sufficient, the compressible amount is larger, and the sealing effect is kept. The placing position of the C-shaped support frame 41 is designed according to the calculation and verification of the compression amount of the nitrile rubber.
The application also discloses some embodiments, bearing inner race 1's periphery side is provided with concave-convex structure 11, and concave-convex structure 11 can be with the unsmooth cooperation of bearing room. The concave-convex structure 11 is a protrusion, the longitudinal section of the protrusion is a trapezoid structure, the upper bottom of the trapezoid structure is arranged on one side close to the rotating structure 3, the concave-convex structure 11 designed on the bearing outer ring 1 is matched with the front gland and the rear gland of the bearing, namely the bearing gland is matched with the concave-convex structure 11 on the bearing outer ring 1, and the problem of clearance between the bearing and a bearing chamber, which causes the sweeping and boring of a motor, is avoided; the problem that the motor sweeps the bore is avoided due to the fact that the rotor deflects caused by the gap between the bearing and the bearing chamber in the later period, the bearing stress of the motor for fixing the rotor is uneven.
Utilize bearing inner race 1's concave-convex structure 11, with bearing inner race 1 and bearing front and back gland assembly, relatively fixed between the three, adopt transition fit between bearing and the end cover 73, avoid bearing and end cover 73 bearing chamber clearance fit, or long-term overload or other influence clearance grow between the two to lead to motor stator and rotor decentraction, the air gap between the stator and rotor is uneven, long-term wearing and tearing, seriously arouse the motor to sweep the problem of boring.
The bearing structure and the bearing chamber on the end cover 73 are in transition fit, the position of the bearing structure is fixed by utilizing the front gland and the rear gland of the bearing, the problem of clearance between the bearing structure and the bearing chamber on the end cover 73 is avoided, the axial displacement and the radial run-out deviation of a rotor are caused, the rotation precision of the rotor cannot be fixed, the fit clearance between the rotor and the stator is changed, and the rotor directly touches the stator to cause the rotor to scrape and sweep the stator.
According to an embodiment of the present application, there is provided a motor including a bearing structure, the bearing structure being the above-described bearing structure. The motor further comprises a rotating shaft 8.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.
Claims (10)
1. A bearing structure, comprising:
a bearing inner race (2);
a bearing outer ring (1);
the rotating structure (3), the rotating structure (3) is arranged between the bearing inner ring (2) and the bearing outer ring (1);
and a support structure (4), wherein the support structure (4) can support the bearing outer ring (1) so that the clearance between the bearing outer ring (1) and the rotating structure (3) is within a first preset clearance range; and/or the support structure (4) can support the bearing inner ring (2) so that the clearance between the bearing inner ring (2) and the rotating structure (3) is within a second preset clearance range.
2. Bearing arrangement according to claim 1, characterized in that the support structure (4) comprises a support frame (41), which support frame (41) comprises a radial extension which extends from the inner bearing ring (2) to the outer bearing ring (1).
3. Bearing construction according to claim 2, characterized in that the support frame (41) is a C-shaped structure facing the rotating structure (3) in a longitudinal section of the bearing construction.
4. The bearing arrangement as claimed in claim 2, characterized in that the support frame (41) further comprises an axial extension provided at an end of the radial extension; the axial extension is arranged inside the bearing inner ring (2) and/or inside the bearing outer ring (1).
5. The bearing arrangement as claimed in claim 4, characterized in that the axial extension is located on the inner circumferential side of the rotating structure (3) when the axial extension is arranged inside the inner bearing ring (2);
and/or when the axial extension part is arranged in the bearing outer ring (1), the axial extension part is positioned on the outer peripheral side of the rotating structure (3).
6. Bearing construction according to claim 2, wherein the support structure (4) further comprises a resilient structure (42), the resilient structure (42) being arranged between the support frame (41) and the inner bearing ring (2) and/or the resilient structure (42) being arranged between the support frame (41) and the outer bearing ring (1).
7. The bearing arrangement as claimed in claim 6, characterized in that the support structure (4) comprises a sealing cover which is located at the axial ends of the bearing outer ring (1) and the bearing inner ring (2) and which is arranged between the bearing outer ring (1) and the bearing inner ring (2); the sealing cover forms the elastic structure (42); the support frame (41) is arranged inside the sealing cover.
8. The bearing structure according to claim 7, wherein the bearing outer ring (1) and the bearing inner ring (2) are each provided at an axial end portion thereof with a mounting groove (5), and the seal cover is disposed in the mounting groove (5).
9. A bearing arrangement according to claim 1, characterized in that the outer circumferential side of the bearing outer ring (1) is provided with a relief structure (11), which relief structure (11) is capable of relief-fitting into a bearing chamber.
10. An electrical machine comprising a bearing arrangement, characterized in that the bearing arrangement is a bearing arrangement according to any one of claims 1-9.
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| CN202111502223.4A CN114198395B (en) | 2021-12-09 | 2021-12-09 | Bearing structure and motor with same |
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| CN202111502223.4A CN114198395B (en) | 2021-12-09 | 2021-12-09 | Bearing structure and motor with same |
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| CN114198395A true CN114198395A (en) | 2022-03-18 |
| CN114198395B CN114198395B (en) | 2023-05-23 |
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|---|---|
| CN114198395B (en) | 2023-05-23 |
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