CN114810836B - Wide temperature adaptation type bearing sealing structure - Google Patents

Wide temperature adaptation type bearing sealing structure Download PDF

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Publication number
CN114810836B
CN114810836B CN202210459639.0A CN202210459639A CN114810836B CN 114810836 B CN114810836 B CN 114810836B CN 202210459639 A CN202210459639 A CN 202210459639A CN 114810836 B CN114810836 B CN 114810836B
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China
Prior art keywords
sealing
bearing
seal
temperature
elastic
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CN202210459639.0A
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CN114810836A (en
Inventor
李亮
李鸿亮
马立
赵圣卿
刘良勇
王福荣
郑艳伟
徐润润
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Luoyang Bearing Research Institute Co Ltd
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Luoyang Bearing Research Institute Co Ltd
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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
    • F16C33/72—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
    • F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
    • F16C33/7823—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of sealing lips
    • 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
    • F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
    • F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
    • F16C33/7853—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
    • F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3268—Mounting of sealing 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials

Abstract

The utility model provides a wide temperature adaptation type bearing seal structure, including the bearing outer lane, bearing inner circle and two sealing washer, the sealing washer comprises steel skeleton and elastic sealing spare, elastic sealing spare is provided with the sealing lip that is used for carrying out the accommodation chamber shutoff with bearing inner circle contact in its radial one end, radial other end is provided with two at least sealed archs, sealed arch is the taper structure that outwards extends the end and constantly reduces, and interval and parallel arrangement about a plurality of sealed archs, still be provided with a plurality of seal grooves on the bearing outer lane, this seal groove can carry out one-to-one cooperation dress card with sealed arch on the seal ring, be clearance fit state between matched seal groove and the sealed arch. The bearing sealing structure provided by the invention has strong adaptability in high-low temperature working environments, and can be used in a wide temperature range without sealing failure or falling off of a sealing ring, so that the sealing reliability of the bearing in working can be effectively ensured, and the service life of the bearing is prolonged.

Description

Wide temperature adaptation type bearing sealing structure
Technical Field
The invention relates to the technical field of bearings, in particular to a wide-temperature adaptive bearing sealing structure.
Background
At present, a sealing ring of a sealing bearing often loosens in the use process, so that the sealing is not tight and a cover is dropped. Especially under the service environment such as high low temperature wide temperature, vibration are big, the unusual phenomenon such as sealing failure, even drop of sealing washer appears more easily to influence the performance and the reliability of bearing. For example, the chinese patent application with application publication number CN11122487a discloses a sealed bearing, the left and right sides of the retainer are provided with sealing rings, the radial outer diameter of the sealing rings and the clamping installation of the outer ring sealing grooves are guaranteed by the deformation of the sealing rings, and the deformation of the sealing rings is increased or decreased under the environment of high and low temperature, wide temperature and large vibration, so that the installation firmness of the sealing rings and the operation reliability are affected, and the bearing performance is further affected.
Therefore, how to ensure that the sealing bearing is not failed and the sealing ring is not dropped under the working condition is a technical problem to be solved by the person skilled in the art.
Disclosure of Invention
The technical purpose of the invention is as follows: the bearing sealing structure is strong in adaptability under high-low temperature working environments, sealing failure or falling of the sealing ring can not occur when the bearing is used in a wide temperature range, and sealing reliability of the bearing during working can be effectively guaranteed, so that the service life of the bearing is prolonged.
The invention aims to solve the technical problems, and adopts the technical scheme that: the utility model provides a wide temperature adaptation type bearing seal structure, includes bearing outer lane, bearing inner circle and two sealing washer, two sealing washer bilateral symmetry sets up between bearing outer lane and bearing inner circle to enclose together with bearing outer lane and bearing inner circle and constitute a hollow holding chamber, the center department of this holding chamber has the steel ball through the fixed support of holder, the sealing washer constitute by steel skeleton and cladding at the elastic seal spare in the steel skeleton outside, the elastic seal spare be provided with the seal lip that is used for carrying out holding chamber shutoff with bearing inner circle contact in its radial one end, radial other end is provided with two at least sealing bulges, sealing bulge be the taper structure that outwards extends the end constantly to reduce, and a plurality of sealing bulges interval and parallel arrangement about still are provided with a plurality of seal grooves on the bearing outer lane, this seal groove can carry out one-to-one with the sealing bulge on the sealing washer and cooperate the dress card, be clearance fit state between matched with seal groove and the sealing bulge, and this clearance fit state satisfies following formula requirement:
D 1 -a＞D 0 ＞D 2 +b，
wherein a= (D 0 ×γ 1 －D 1 ×γ 2 ）×Δt 1 ；b＝（D 0 ×γ 1 －D 2 ×γ 2 ）×Δt 2 ；D 1 The maximum distance between the sealing groove and the outer diameter of the bearing inner ring is the maximum distance; d (D) 2 The minimum distance between the sealing groove and the outer diameter of the bearing inner ring; d (D) 0 Radial width of the elastic sealing element at room temperature of 25 ℃; gamma ray 1 Is the thermal coefficient of expansion of the elastic seal; gamma ray 2 Is the coefficient of thermal expansion of steel; Δt (delta t) 1 The temperature difference between the working temperature and the room temperature of 25 ℃ is the temperature difference when the bearing sealing structure works under the high temperature condition; Δt (delta t) 2 The temperature difference between the working temperature and the room temperature of 25 ℃ is the temperature difference when the bearing sealing structure works under the low-temperature condition.
Preferably, the number of the sealing lips 3021 on the elastic sealing member 302 is two, and the two sealing lips 3021 are symmetrically disposed at one end of the elastic sealing member.
Preferably, the plurality of sealing protrusions 3022 on the elastic sealing member 302 are uniformly spaced apart from each other.
Preferably, the elastic sealing member 302 is made of rubber.
Preferably, the number of the sealing protrusions 3022 on the elastic sealing member 302 is three.
The beneficial effects are that:
the wide temperature adaptive bearing sealing structure is simple in structure and convenient to use. The bearing sealing structure is provided with at least 2 equidistant sealing bulges on the sealing ring, a certain gap is reserved when the sealing bulges are matched with the sealing groove on the outer ring of the bearing, the gap between the matching structures is ensured when the bearing operates in a high-temperature environment, and meanwhile, the outer diameter of the sealing bulges in the sealing ring between the matching structures is ensured to be larger than the inner diameter of the sealing groove when the bearing operates in a low-temperature environment, so that sealing failure and falling of the sealing ring can not occur, and the sealing reliability of the bearing during operation is effectively improved. Meanwhile, in the bearing sealing structure, after at least 2 sealing bulges are assembled and installed with the sealing groove, the firmness is enhanced, and the sealing ring does not deform at a wide temperature, so that the sealing performance of the bearing is not influenced when the bearing works in a vibration environment, and the stability is good.
Drawings
FIG. 1 is a schematic cross-sectional view of the structure of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
reference numerals: 1. the bearing comprises a bearing outer ring, 2, a bearing inner ring, 3, a sealing ring, 301, a steel frame, 302, an elastic sealing piece, 3021, a sealing lip, 3022, a sealing bulge, 4, a containing cavity, 5, a retainer, 6, a steel ball, 7 and a sealing groove.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the wide temperature adaptation type bearing sealing structure of the invention comprises a bearing outer ring 1, a bearing inner ring 2 and two sealing rings 3, wherein the two sealing rings 3 are symmetrically arranged between the bearing outer ring 1 and the bearing inner ring 2, and form a hollow accommodating cavity 4 together with the bearing outer ring 1 and the bearing inner ring 2, a steel ball 6 is fixedly supported at the center of the accommodating cavity 4 through a retainer 5, a plurality of sealing grooves 7 are arranged on the inner diameter of the bearing outer ring 1 at equal intervals, the sealing rings 3 are formed by a steel skeleton 301 and an elastic sealing member 302 coated on the outer side of the steel skeleton 301, one end of the elastic sealing member 302 in the radial direction is provided with sealing lips 3021 for contacting with the bearing inner ring 2 to seal the accommodating cavity 4, the number of the sealing lips 3021 is two, the two sealing lips 3021 are symmetrically arranged at the left and right ends of the elastic sealing member, the other end of the radial direction is provided with at least two sealing protrusions 3022, the sealing protrusions 3022 are in a tapered structure with outwards extending ends continuously reduced, the plurality of sealing protrusions 3022 are uniformly arranged at intervals, the left and the sealing protrusions 3022 are matched with the sealing grooves 2 in a clearance fit with the sealing grooves 7 in a clearance fit mode, and the sealing grooves 2 are in a clearance fit mode, and the sealing condition is satisfied in a clearance fit mode:
a＝D 1 －D H the seal ring is not deformed when in contact with the seal groove in a high temperature state, and the clearance fit amount is at least a= (D) 0 ×γ 1 －D 1 ×γ 2 ）×Δt 1
b＝D L －D 2 The sealing ring and the sealing groove are not separated under the low temperature state, the outer diameter of the sealing ring is larger than the inner diameter of the sealing groove by at least b= (D) 0 ×γ 1 －D 2 ×γ 2 ）×Δt 2
From the above, the outer diameter of the sealing ring is D 0 ＞D 2 +b, and D 0 ＜D 1 -a。
Δt 1 Delta t is the difference between the high temperature and the normal temperature (room temperature of 25 ℃) 2 Is the difference between the normal temperature (25 ℃ room temperature) and the low temperature;
wherein D is 1 For the maximum distance of the seal groove from the outer diameter of the bearing inner ring, i.e. D 1 The diameter of the bottom of the sealing groove of the outer ring of the bearing is; d (D) 2 For the minimum distance of the seal groove from the outer diameter of the bearing inner ring, i.e. D 2 The inner diameter of the sealing groove is the inner diameter of the bearing outer ring; d (D) 0 Radial width of the elastic sealing element at room temperature of 25 ℃; d (D) H The radial width of the elastic sealing element is the radial width of the bearing sealing structure when the bearing sealing structure works under the high-temperature condition; d (D) L The radial width of the elastic sealing element is the radial width of the bearing sealing structure when the bearing sealing structure works under the low-temperature condition; gamma ray 1 Is elasticThermal coefficient of expansion of the seal; gamma ray 2 Is the coefficient of thermal expansion of steel; Δt (delta t) 1 The temperature difference between the working temperature and the room temperature of 25 ℃ is the temperature difference when the bearing sealing structure works under the high temperature condition; Δt (delta t) 2 The temperature difference between the working temperature and the room temperature of 25 ℃ is the temperature difference when the bearing sealing structure works under the low-temperature condition; a is D when the bearing sealing structure works under the high temperature condition 1 A height difference from a radial width of the elastomeric seal; b is the radial width and D of the elastic sealing element when the bearing sealing structure works under the low-temperature condition 2 Height difference between them.
The formula is required to ensure that a gap exists between the matched structures formed by the sealing groove and the sealing bulge group when the bearing sealing structure is used in a high-temperature environment, and simultaneously, the outer diameter of the sealing bulge in the sealing ring between the matched structures formed by the sealing groove and the sealing bulge group is larger than the inner diameter of the sealing groove when the bearing sealing structure is used in a low-temperature environment.
The wide-temperature adaptive bearing sealing structure provided by the invention is based on technical innovation in use environments such as high and low temperature wide temperature, large vibration and the like.
The structure is characterized in that at least 2 equidistant sealing grooves are arranged on the outer ring of the bearing, so that the fixation is enhanced, and the bearing is favorable for the environment with large vibration.
Secondly, considering the high temperature environment, a certain clearance a millimeter is reserved when the sealing bulge is matched with the sealing groove (the linear expansion coefficient of the sealing ring material and the steel material is considered for calculation), so that the clearance is reserved in the high temperature environment when the bearing runs, and the sealing ring is not deformed.
Thirdly, consider low temperature environment, sealing washer sealed protruding external diameter is greater than the seal groove internal diameter under low temperature environment, and its value is b millimeter (consider the coefficient of linear expansion of sealing washer material and steel material to calculate), guarantees can not appear the sealing washer and drop, causes sealed inefficacy.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the whole of the present invention, but it is to be understood that the present invention is described in detail with reference to the foregoing embodiment, and that modifications in form or equivalents of some of the technical features described in the foregoing embodiment may be made by those skilled in the art. Modifications, equivalents, and the like, which are all intended to be included within the spirit and scope of the present invention, are intended to be included within the scope of the present invention.

Claims (4)

1. The utility model provides a wide temperature adaptation type bearing seal structure, includes bearing outer lane (1), bearing inner circle (2) and two sealing washer (3), and two sealing washer (3) bilateral symmetry set up between bearing outer lane (1) and bearing inner circle (2) to enclose together with bearing outer lane (1) and bearing inner circle (2) and constitute a hollow holding chamber (4), the center department of this holding chamber (4) has steel ball (6) through holder (5) fixed stay, its characterized in that: sealing washer (3) constitute by steel skeleton (301) and cladding at elastic seal (302) in steel skeleton (301) outside, elastic seal (302) be provided with in its radial one end and be used for carrying out sealing lip (3021) of holding chamber (4) shutoff with bearing inner race (2) contact, the number of sealing lip (3021) is two, and two sealing lips (3021) are in the bilateral symmetry setting of one end of elastic seal (302), radial other end is provided with two at least sealing bulge (3022), sealing bulge (3022) be the taper structure that outwards extends the end constantly to shrink, and a plurality of sealing bulge (3022) interval about and parallel arrangement still are provided with a plurality of seal grooves (7) on bearing outer lane (1), this seal groove (7) can carry out one-to-one cooperation dress card with sealing bulge (3022) on sealing washer (3), be clearance fit state between matched seal groove (7) and the sealing bulge (3022), and this clearance fit state satisfies following requirement:
D 1 -a＞D 0 ＞D 2 +b，
wherein a= (D 0 ×γ 1 －D 1 ×γ 2 ）×Δt 1 ；b＝（D 0 ×γ 1 －D 2 ×γ 2 ）×Δt 2 ；D 1 The maximum distance between the sealing groove and the outer diameter of the bearing inner ring is the maximum distance; d (D) 2 For sealing the groove from the bearing inner ringMinimum distance of outer diameter; d (D) 0 Radial width of the elastic sealing element at room temperature of 25 ℃; gamma ray 1 Is the thermal coefficient of expansion of the elastic seal; gamma ray 2 Is the coefficient of thermal expansion of steel; Δt (delta t) 1 The temperature difference between the working temperature and the room temperature of 25 ℃ is the temperature difference when the bearing sealing structure works under the high temperature condition; Δt (delta t) 2 The temperature difference between the working temperature and the room temperature of 25 ℃ is the temperature difference when the bearing sealing structure works under the low-temperature condition.
2. The wide temperature range adaptive bearing sealing structure according to claim 1, wherein: the plurality of sealing protrusions (3022) on the elastic sealing member (302) are arranged at regular intervals from side to side.
3. The wide temperature range adaptive bearing sealing structure according to claim 1, wherein: the elastic sealing element (302) is made of rubber.
4. The wide temperature range adaptive bearing sealing structure according to claim 1, wherein: the number of the sealing protrusions (3022) on the elastic sealing element (302) is three.
CN202210459639.0A 2022-04-28 2022-04-28 Wide temperature adaptation type bearing sealing structure Active CN114810836B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN114810836B true CN114810836B (en) 2024-03-26

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