CN116398542B - Ultra-high-speed waterproof bearing - Google Patents

Ultra-high-speed waterproof bearing Download PDF

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Publication number
CN116398542B
CN116398542B CN202310672302.2A CN202310672302A CN116398542B CN 116398542 B CN116398542 B CN 116398542B CN 202310672302 A CN202310672302 A CN 202310672302A CN 116398542 B CN116398542 B CN 116398542B
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China
Prior art keywords
ring
sealing
sheath
oil
storage space
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CN202310672302.2A
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Chinese (zh)
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CN116398542A (en
Inventor
钱鹏飞
陈锋
吴雄
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Suzhou Tie Jin Science & Technology Corp ltd
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Suzhou Tie Jin Science & Technology Corp ltd
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Publication of CN116398542A publication Critical patent/CN116398542A/en
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Classifications

    • 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
    • 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
    • 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
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/664—Retaining the liquid in or near the bearing
    • 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
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6681—Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements
    • 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
    • F16C33/762—Sealings of ball or roller bearings by means of a fluid
    • F16C33/763—Sealings of ball or roller bearings by means of a fluid retained in the sealing gap
    • 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
    • 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
    • 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
    • F16C33/7889—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to an inner race and extending toward the outer race
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/063—Fixing them on the shaft
    • 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
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/20—Application independent of particular apparatuses related to type of movement
    • F16C2300/22—High-speed rotation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction 

Abstract

The invention relates to an ultra-high-speed waterproof bearing, which belongs to the technical field of bearings and comprises an outer ring, an inner ring, a sealing rubber ring and a sealing cover, wherein the inner ring is coaxially arranged in the middle of the outer ring and is in rotary fit with the outer ring through balls, a shaft rod is fixed in the middle of the inner ring, and the sealing rubber ring is positioned at a gap between the outer ring and the inner ring. According to the invention, the sealing cover is arranged on one side of the bearing, so that the contact between the sealing rubber ring and the external wading environment is further isolated, a certain water-proof performance is provided, an oil storage space is arranged between the bottom of the sheath and the shaft rod, oil grooves are formed in the end faces of the inner side and the outer side of the sheath, and when the shaft rod and the inner ring synchronously rotate, oil in the oil storage space can move upwards along the oil grooves under the action of centrifugal force, so that the friction force between the sheath, the inner ring and the shaft rod is reduced.

Description

Ultra-high-speed waterproof bearing
Technical Field
The invention belongs to the technical field of bearings, and particularly relates to an ultra-high-speed waterproof bearing.
Background
The bearing is mainly used for supporting the mechanical rotating body, reducing the friction coefficient in the motion process and ensuring the rotation precision of the mechanical rotating body, but in some wading environments, a certain gap is required to be reserved between the inner ring and the outer ring of the bearing, and water easily enters the bearing from the gap, so that the problem of water inflow in the bearing is easily generated.
The utility model discloses a chinese patent of publication No. CN216715011U among the prior art, the patent name is a waterproof bearing, specifically disclose including outer lane, inner circle, holder, ball and sealing washer, ball and holder swing joint, the ball is spacing between outer lane and inner circle, and the sealing washer sets up in outer lane both sides, outer lane and inner circle edge are equipped with the seal groove, and the sealing washer is installed in the seal groove, and the sealing washer includes dustproof portion and sealing portion two parts, and dustproof portion is connected with sealing portion, provides better waterproof performance's technical scheme, and dustproof portion in the above-mentioned scheme is the metal material, and sealing portion is the rubber material, adopts dustproof portion and sealing portion composite design, and the torsional torque of sealing washer is 0.0162-0.0268n.m, ensures that sealing washer and seal groove are good to be contacted, prevents that the sealing washer warp, ensures good sealing performance simultaneously, and dustproof portion surface adopts nickel plating zinc to handle, has strengthened anticorrosive function, satisfies adverse circumstances demand.
However, in the above scheme, a certain gap must be formed between the seal ring and the seal groove, and if the gap between the seal ring and the seal groove is reduced to achieve an interference fit state, the rotation resistance of the inner ring is increased, and the abrasion of the seal ring is also increased.
Disclosure of Invention
The technical problems to be solved are as follows:
aiming at the defects existing in the prior art, the invention provides the ultra-high-speed waterproof bearing, which can effectively solve the problem that the waterproof performance between a sealing ring and an inner ring is not good enough in the prior art.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
the invention provides an ultra-high-speed waterproof bearing which comprises an outer ring, an inner ring, a sealing rubber ring and a sealing cover, wherein the inner ring is coaxially arranged in the middle of the outer ring and is in running fit with the outer ring through a ball, a shaft rod is fixed in the middle of the inner ring, the sealing rubber ring is positioned at a gap between the outer ring and the inner ring, the outer end of the sealing rubber ring is fixed on the inner end face of the outer ring, meanwhile, the inner end of the sealing rubber ring is in clearance fit with the outer end of the inner ring, and the sealing cover is sleeved on the outer ring and is in clearance fit with the shaft rod.
The axostylus axostyle includes fixed part and cooperation portion, the fixed part is fixed on the interior terminal surface of inner circle, cooperation portion extends towards sealed rubber ring direction from one side of fixed part, and the diameter of cooperation portion is less than fixed part and forms an oil storage space with between the interior terminal surface of inner circle, be equipped with sealed oil in the oil storage space, the bottom of sealed lid is equipped with a sheath that is annular form perpendicularly, the sheath extends in the oil storage space towards the oil storage space, and the one end of axostylus axostyle is kept away from to the sheath with the inner clearance fit of inner circle in the oil storage space.
Further, an annular cavity is formed in the outer end of the inner ring, the inner end of the sealing rubber ring is an inclined plane, and the upper edge of the inclined plane is clamped into the annular cavity and enables the upper end face of the sealing rubber ring to be attached to the upper end of the inner side of the annular cavity.
Further, the inner end inclined surface of the sealing rubber ring is abutted against the outer edge of the lower end of the annular cavity.
Further, the inner edge of the upper end of the inner ring is a slope inclined downwards, a first sealing ring is sleeved outside the sheath, the outer end of the first sealing ring is in clearance fit with the slope on the inner edge of the inner ring, and a hydrophobic coating is arranged on the surface of the first sealing ring.
Further, the outside cover of cooperation portion has the second sealing ring, the surface of second sealing ring is equipped with hydrophobic coating, is located the slope that the upper end inner edge of sealed lid is the downward sloping, the outside end of second sealing ring and the slope clearance fit on the sealed lid inner edge.
Further, a step is arranged on the inner end face of the inner ring, and the step is attached to the bottom of the oil storage space and is contacted with the bottom of the sheath.
Further, a plurality of oil passing grooves are respectively formed in the outer end of the sheath and the outer end of the shaft lever matching part along the axial direction of the sheath, and the bottom of each oil passing groove is immersed into sealing oil in the oil storage space.
Further, each oil passing groove gradually reduces in depth from the bottom of the oil storage space along the extending direction of the oil passing groove.
Further, the outer end of each sheath and one end of the bottom of the oil storage space, far away from the oil passing groove, of the outer end of the shaft lever matching part extend to one ends of the first sealing ring and the second sealing ring respectively.
Further, the sealing cover is made of metal, a round table is arranged in the middle of the sealing cover, and the sheath is coaxially arranged at the bottom of the round table.
Compared with the known public technology, the technical scheme provided by the invention has the following beneficial effects:
according to the invention, the sealing cover is arranged on one side of the bearing, so that the contact between the sealing rubber ring and the external wading environment is further isolated, and a certain water-proof performance is provided;
through setting up an oil storage space between the bottom of sheath and axostylus axostyle to let the oil groove have all been seted up on the both sides terminal surface in sheath inside and outside, when axostylus axostyle and inner circle synchronous rotation, under the effect of centrifugal force, can let the oil in the oil storage space upwards move along the oil groove, and then lubricate in filling up the clearance between sheath and inner circle and the axostylus axostyle, reduce the frictional force each other;
the oil passing groove reduces the contact area between the sheath and the inner ring as well as the shaft lever, thereby further reducing the friction force between the sheath and the inner ring as well as between the sheath and the shaft lever.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 is a diagram showing an example of the structure of an oil passing groove provided at the outer end of a mating portion according to an embodiment of the present invention;
FIG. 2 is a schematic view of the overall structure of a bearing according to an embodiment of the present invention;
FIG. 3 is a diagram showing an example of the structure of the oil passing groove provided at the outer end of the sheath according to the embodiment of the present invention;
FIG. 4 is a schematic view of the overall cross-sectional structure of a bearing according to an embodiment of the present invention;
FIG. 5 is an enlarged schematic view of the structure A in FIG. 4 according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a sealing cover (oil grooves are formed in the inner end face and the outer end face of a sheath) in an embodiment of the invention.
Reference numerals: 1. an outer ring; 2. an inner ring; 21. an annular cavity; 22. a step; 3. a shaft lever; 31. a fixing part; 32. a mating portion; 321. a second seal ring; 4. sealing rubber rings; 41. shaping the sheet; 5. sealing cover; 51. a sheath; 511. a first seal ring; 512. passing through an oil groove; 52. round bench; 6. an oil storage space.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", etc., azimuth or positional relationship are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description and simplification of operations, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
The invention is further described below with reference to examples.
Examples: in some wading environments or outdoor conditions, the waterproof performance of the bearing must be considered, at present, a sealing rubber ring is mostly arranged at a gap between an inner ring and an outer ring, and the sealing rubber ring is matched with the inner ring by adopting a clearance fit, namely, a small clearance fit between the inner end of the sealing rubber ring and the outer end of the inner ring, and even a small clearance is likely to have water inflow, and if an interference fit is adopted between the sealing rubber ring and the inner ring, the friction force for rotating the inner ring is necessarily increased.
Therefore, the ultra-high-speed waterproof bearing is provided in the embodiment, so that the maximum effect of the sealing rubber ring is ensured on the premise of reducing the resistance of the rotation of the inner ring to the maximum extent.
Referring to fig. 1-6, the ultra-high speed waterproof bearing comprises an outer ring 1, an inner ring 2, a sealing rubber ring 4 and a sealing cover 5, wherein the inner ring 2 is coaxially arranged in the middle of the outer ring 1 and is in running fit with the outer ring 1 through a ball, a shaft rod 3 is fixed in the middle of the inner ring 2, the sealing rubber ring 4 is positioned at a gap between the outer ring 1 and the inner ring 2, the outer end of the sealing rubber ring 4 is fixed on the inner end surface of the outer ring 1, the fixing mode is a known technology, and the adopted specific fixing mode is not limited in detail.
In this case, an annular cavity 21 is formed at the outer end of the inner ring 2, and the inner end of the sealing rubber ring 4 is in small clearance fit with the outer end of the inner ring 2, specifically, the inner end of the sealing rubber ring 4 in this case is an inclined plane, and the upper edge of the inclined plane is clamped into the annular cavity 21, so that the upper end face of the sealing rubber ring 4 is attached to the upper end of the inner side of the annular cavity 21.
Namely, during assembly, after the outer end face of the sealing rubber ring 4 is fixed on the outer ring 1, the inner end of the sealing rubber ring 4 is pressed towards a gap between the inner ring 2 and the outer ring 1 and can quickly reach a fixed position, because of the elasticity of the sealing rubber ring 4, when the inner ring 2 rotates, the inner end of the sealing rubber ring 4 can be always in the annular cavity 21, and the inner end inclined surface of the sealing rubber ring 4 is abutted against the outer edge of the lower end of the annular cavity 21, so that a good sealing effect is achieved, and meanwhile, compared with the traditional interference fit, the contact area is reduced, so that the contact resistance of the inner end and the outer end is small.
It should be noted that even though the interference fit of the packing follower 4 with the annular cavity 21 on the inner ring 2 results in increased wear of the following packing follower 4 and increased distance between the annular cavities 21, the seal can still be provided by the effect of the seal cap 5.
In order to secure the fixing effect of the packing ring 4, a metal molding piece 41 is provided in the packing ring 4.
The sealing cover 5 is sleeved on the outer ring 1, the inner end of the sealing cover is in clearance fit with the shaft lever 3, and specifically, the bottom end of the outer edge of the sealing cover 5 extends downwards to be in sealing and fixing treatment with the outer end of the outer ring 1.
The sealing cover 5 is made of metal, a round table 52 is arranged in the middle of the sealing cover, a shaft lever 3 is inserted in the middle of the round table 52, and the shaft lever 3 passes through the middle of the round table 52 and is fixed with the inner ring 2.
Specifically, the shaft lever 3 includes the fixed part 31 and the cooperation portion 32, the fixed part 31 is fixed on the interior terminal surface of inner circle 2, cooperation portion 32 extends towards sealed packing ring 4 direction from one side of fixed part 31, and the diameter of cooperation portion 32 is less than fixed part 31 and forms an oil storage space 6 with between the interior terminal surface of inner circle 2, be equipped with sealed oil in the oil storage space 6, the bottom of sealed lid 5 is equipped with a sheath 51 that is annular perpendicularly, sheath 51 coaxial arrangement is in the bottom of round platform 52, and extend towards in the oil storage space 6, and the one end that sheath 51 kept away from the shaft lever 3 is in oil storage space 6 with the inner clearance fit of inner circle 2.
It should be noted that a step 22 is disposed on the inner end surface of the inner ring 2, and the step 22 is attached to the bottom of the oil storage space 6 and contacts with the bottom of the sheath 51.
When the sealing cover 5 is installed, the bottom of the sheath 51 will abut against the step 22, and since the fixing portion 31 is fixed on the inner end surface of the inner ring 2, in this case, a glue fixing manner is adopted, the sealing oil inside cannot flow away along the axial direction of the fixing portion 31, and the sealing oil can actually use lubricating grease, and due to good hydrophobicity and lubricity, the sheath 51 at the bottom of the sealing cover 5 can have smaller friction between the shaft rod 3 and the inner ring 2.
And a plurality of oil passing grooves 512 are respectively formed in the outer end of the sheath 51 and the outer end of the upper matching part 32 of the shaft rod 3 along the axial direction of the sheath 51, the bottom of each oil passing groove 512 is immersed into the sealing oil in the oil storage space 6, and the oil passing grooves 512 are respectively circumferentially arranged in the outer end of the sheath 51 and the outer end of the upper matching part 32 of the shaft rod 3.
Thereby seal oil in the oil storage space 6 has the motion of two places when the axostylus axostyle 3 is rotatory, and when axostylus axostyle 3 rotated, seal oil can move along the oil groove 512 that crosses that sets up on the axostylus axostyle 3, simultaneously because the axostylus axostyle 3 is rotatory causes the disturbance to seal oil in the oil storage space 6, provides certain centrifugal force, under the effect of centrifugal force, the oil groove 512 that crosses that the outer end of sheath 51 was offered also can be followed to a part of seal oil in the oil storage space 6 removes, and oil can wipe the orientation terminal surface of oil groove 512 at the removal in-process, lubricates the clearance face. (in this case, the sheath 51 is in a small clearance fit with the shaft 3 and the inner ring 2, so that a large gap is left in the figure for easy understanding, and the sheath and the shaft 3 are substantially in contact with each other)
And each oil passing groove 512 gradually reduces in depth along the extending direction of the oil passing groove 512 from the bottom of the oil storage space 6, namely, the more upwards is, the less the lubricating oil can slide in a guiding way, and when reaching the top end of the oil passing groove 512, the lubricating oil is forced to be thrown out to the periphery, so that the probability of throwing out the lubricating oil from the oil storage space 6 is reduced.
And inner race 2 rotates under the high speed, and centrifugal force can be very big, when oil reached the top of oil groove 512, because the cell body degree of depth is less, can provide the effect of direction and weaken, and oil this moment can be thrown away from oil groove 512, hits on the inner of sheath 51 and inner face of inner race 2, when inner race 2 and sheath 51 carry out the clearance cooperation, is full of sealing oil in the clearance, guarantees that moisture is difficult to get into through the hydrophobicity of oil promptly, and the lubrication of oil also reduces the resistance between inner race 2 and the sheath 51 simultaneously.
In order to further avoid the lubricating oil from throwing out of the oil storage space 6, in the present case, the inner edge of the upper end of the inner ring 2 presents a slope inclined downwards, a first sealing ring 511 is sleeved outside the sheath 51, the outer end of the first sealing ring 511 is in clearance fit with the slope on the inner edge of the inner ring 2, and a hydrophobic coating is arranged on the surface of the first sealing ring 511 and used for blocking the sealing oil flowing in the direction of the outer end of the sheath 51.
Meanwhile, the second sealing ring 321 is sleeved on the outer side of the matching part 32, a hydrophobic coating is arranged on the surface of the second sealing ring 321, the inner edge of the upper end of the sealing cover 5 is a slope surface inclined downwards, and the outer side end of the second sealing ring 321 is in clearance fit with the slope surface on the inner edge of the sealing cover 5 and is used for blocking sealing oil flowing in the clearance of the outer side of the matching part 32.
It should be noted that the overall thickness of the sheath 51 is thinner, so that the oil passing groove 512 for sealing the oil flow between the sheath 51 and the shaft 3 is formed at the outer end of the shaft 3, and the oil passing groove 512 can be directly formed at the inner and outer end surfaces of the sheath 51 on some large bearings without affecting the use, in this case, only the oil passing groove 512 is formed at the outer end of the shaft 3, and the oil passing groove 512 formed at the inner end surface of the sheath 51 has the same property, which is not repeated, and the structure of the sheath 51 in fig. 6 can be referred to.
And the outer end of each sheath 51 and the end of the oil passing groove 512 provided on the outer end of the mating portion 32 of the shaft rod 3, which is far away from the bottom of the oil storage space 6, extend to the ends of the first sealing ring 511 and the second sealing ring 321, respectively, so that the first sealing ring 511 and the second sealing ring 321 are utilized to block the communication of the lubricating oil with the outside, and the lubricating oil cannot flow out of the oil storage space 6 even if the bearing is inverted before being assembled.
In this case, the first sealing ring 511 and the second sealing ring 321 are made of smooth rubber, so that the contact area between the inner ring 2 and the sealing cover 5 is very small, and the friction resistance is negligible.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; these modifications or substitutions do not depart from the essence of the corresponding technical solutions from the protection scope of the technical solutions of the embodiments of the present invention.

Claims (8)

1. An ultra-high speed waterproof bearing, comprising:
an outer ring;
the inner ring is coaxially arranged in the middle of the outer ring and is in running fit with the outer ring through balls, and a shaft lever is fixed in the middle of the inner ring;
the sealing rubber ring is positioned at a gap between the outer ring and the inner ring, the outer end of the sealing rubber ring is fixed on the inner end surface of the outer ring, and meanwhile, the inner end of the sealing rubber ring is in clearance fit with the outer end of the inner ring;
the sealing cover is sleeved on the outer ring, and the inner end of the sealing cover is in clearance fit with the shaft lever;
the shaft rod comprises a fixing part and a matching part, wherein the fixing part is fixed on the inner end face of the inner ring, the matching part extends from one side of the fixing part towards the sealing rubber ring, the diameter of the matching part is smaller than that of the fixing part, an oil storage space is formed between the matching part and the inner end face of the inner ring, sealing oil is arranged in the oil storage space, a ring-shaped sheath is vertically arranged at the bottom of the sealing cover, the sheath extends towards the oil storage space, and one end of the sheath, far away from the shaft rod, is in clearance fit with the inner end of the inner ring in the oil storage space;
the inner edge of the upper end of the inner ring is a slope inclined downwards, a first sealing ring is sleeved outside the sheath, the outer end of the first sealing ring is in clearance fit with the slope on the inner edge of the inner ring, and a hydrophobic coating is arranged on the surface of the first sealing ring;
the outside cover of cooperation portion has the second sealing ring, the surface of second sealing ring is equipped with hydrophobic coating, is located the slope that the upper end inner edge of sealed lid is the downward sloping, the outside end of second sealing ring and the slope clearance fit on the sealed lid inner edge.
2. The ultra-high-speed waterproof bearing according to claim 1, wherein an annular cavity is formed in the outer end of the inner ring, the inner end of the sealing rubber ring is an inclined plane, and the upper edge of the inclined plane is clamped into the annular cavity and enables the upper end face of the sealing rubber ring to be attached to the upper end of the inner side of the annular cavity.
3. The ultra-high speed waterproof bearing of claim 2, wherein the inner end slope of the sealing rubber ring abuts against the outer edge of the lower end of the annular cavity.
4. The ultra-high-speed waterproof bearing according to claim 1, wherein a step is arranged on the inner end face of the inner ring, and the step is attached to the bottom of the oil storage space and contacts with the bottom of the sheath.
5. The ultra-high-speed waterproof bearing according to claim 1, wherein a plurality of oil passing grooves are respectively formed in the outer end of the sheath and the outer end of the shaft lever matching part along the axial direction of the sheath, and the bottom of each oil passing groove is immersed into sealing oil in the oil storage space.
6. The ultra-high-speed waterproof bearing according to claim 5, wherein each of the oil passing grooves is gradually reduced in depth from the bottom of the oil storage space in the extending direction of the oil passing groove.
7. The ultra-high-speed waterproof bearing according to claim 6, wherein the outer end of each of the sheaths and the outer end of the shaft engaging portion have an oil passage groove extending from one end of the bottom of the oil storage space to one end of the first seal ring and the second seal ring, respectively.
8. The ultra-high-speed waterproof bearing according to claim 1 or 7, wherein the sealing cover is made of metal, a round table is arranged in the middle of the sealing cover, and the sheath is coaxially arranged at the bottom of the round table.
CN202310672302.2A 2023-06-08 2023-06-08 Ultra-high-speed waterproof bearing Active CN116398542B (en)

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CN202310672302.2A CN116398542B (en) 2023-06-08 2023-06-08 Ultra-high-speed waterproof bearing

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CN116398542B true CN116398542B (en) 2023-08-29

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116950992B (en) * 2023-07-21 2024-02-13 苏州铁近机电科技股份有限公司 Ultra-high-speed waterproof bearing
CN116877586B (en) * 2023-08-03 2023-12-15 苏州铁近机电科技股份有限公司 Anti-electric corrosion bearing

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JP2005023954A (en) * 2003-06-30 2005-01-27 Nsk Ltd Roller bearing
JP2014046412A (en) * 2012-08-31 2014-03-17 Nsk Ltd Spindle device
CN106286608A (en) * 2015-05-26 2017-01-04 舍弗勒技术股份两合公司 Bearing
CN212455232U (en) * 2020-06-18 2021-02-02 宁波四捷精密科技有限公司 High-temperature-resistant grease-leakage-proof bearing
CN214543915U (en) * 2021-04-25 2021-10-29 苏州铁近机电科技股份有限公司 High-speed motor
CN216715011U (en) * 2022-01-20 2022-06-10 慈溪市固德机械有限公司 Waterproof bearing
CN216867322U (en) * 2021-12-07 2022-07-01 苏州铁近机电科技股份有限公司 Waterproof bearing for dry-wet dual-purpose dust collector motor

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005023954A (en) * 2003-06-30 2005-01-27 Nsk Ltd Roller bearing
JP2014046412A (en) * 2012-08-31 2014-03-17 Nsk Ltd Spindle device
CN106286608A (en) * 2015-05-26 2017-01-04 舍弗勒技术股份两合公司 Bearing
CN212455232U (en) * 2020-06-18 2021-02-02 宁波四捷精密科技有限公司 High-temperature-resistant grease-leakage-proof bearing
CN214543915U (en) * 2021-04-25 2021-10-29 苏州铁近机电科技股份有限公司 High-speed motor
CN216867322U (en) * 2021-12-07 2022-07-01 苏州铁近机电科技股份有限公司 Waterproof bearing for dry-wet dual-purpose dust collector motor
CN216715011U (en) * 2022-01-20 2022-06-10 慈溪市固德机械有限公司 Waterproof bearing

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