CN120100815B - Air pressure balanced four-row tapered roller bearings - Google Patents
Air pressure balanced four-row tapered roller bearingsInfo
- Publication number
- CN120100815B CN120100815B CN202510541781.3A CN202510541781A CN120100815B CN 120100815 B CN120100815 B CN 120100815B CN 202510541781 A CN202510541781 A CN 202510541781A CN 120100815 B CN120100815 B CN 120100815B
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- inner ring
- ring
- group
- air pressure
- oil seal
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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
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
- F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
- F16C19/383—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
- F16C19/388—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with four rows, i.e. four row tapered 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
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
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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
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
- F16C33/6607—Retaining the grease in or near the bearing
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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
- F16C33/7813—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 tapered 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The application relates to the technical field of bearings, in particular to a pneumatic balance type four-row tapered roller bearing, which comprises an inner ring group and an outer ring group, wherein an installation gap is arranged between the outer peripheral wall of the inner ring group and the inner peripheral wall of the outer ring group, four rows of roller installation grooves are formed in the installation gap, a plurality of tapered rollers are assembled in the roller installation grooves in a rotating mode, annular retainers are arranged in each row of roller installation grooves, two ends of the installation gap are respectively sealed through two oil seal groups, a plurality of inner vent holes are arranged on the inner ring group in the radial direction, a plurality of outer vent holes are arranged on the outer ring group in the radial direction, pneumatic balance holes are formed in two end faces of the outer ring group, and the pneumatic balance holes, the inner vent holes and the outer vent holes are communicated with the installation gap and are filled with breathable and impermeable grease materials. The application is not easy to leak due to unbalanced air pressure, and the breathable and oil-proof material also has the advantages of blocking oil penetration, preventing oil-crossing phenomenon, being not easy to damage the bearing and prolonging the service life of the bearing.
Description
Technical Field
The application relates to the technical field of bearings, in particular to a pneumatic balance type four-row tapered roller bearing.
Background
Four-row tapered roller bearings are successfully used in bearing arrangements in rolling mills around the world where rolling speeds are low to medium. Due to its design, such a bearing is capable of withstanding axial loads occurring in such applications in addition to radial loads, generally without the need for additional thrust bearings in the bearing arrangement. This means that the roll journal can be relatively short and that the chocks on both sides of the roll can be of the same design, since the design of four rows of tapered roller bearings, which must be mounted as complete bearings on the roll chocks.
For example, the Chinese patent application number CN201010514878.9 discloses a spacer-free four-row tapered roller bearing, which comprises an outer ring, a second outer ring, an inner ring, a retainer and tapered rollers, wherein two single-raceway outer rings and a double-raceway second outer ring between the two single-raceway outer rings are arranged on two sides of the outer part of the bearing, two double-raceway inner rings are arranged on two sides of the inner part of the bearing, tapered rollers are arranged between the inner ring and the outer ring and between the inner ring and the second outer ring, and each tapered roller is fixed by the retainer.
With respect to the related art in the above, the inventors consider that there are the following technical drawbacks to be improved:
In the practical application process, when the bearing is in operation, the temperature of the bearing is increased, so that the inside high temperature and high pressure of the bearing are caused, the inside grease is easy to overflow, even the sealing ring at the end face side is flushed out by the inside high pressure, the bearing is damaged, when the equipment stops working, the temperature of the bearing is continuously restored to normal temperature, negative pressure is formed inside, external pollutants and particles enter the bearing, grease pollution failure and bearing internal abrasion are accelerated, and the service life is greatly shortened.
Disclosure of Invention
The application provides an air pressure balance type four-row tapered roller bearing, which aims to solve the following technical problems:
In the practical application process of the common four-row tapered roller bearing, internal grease is easy to overflow, so that the bearing is damaged, negative pressure is easy to form in the bearing, external pollutants and particles enter the bearing, and grease pollution failure and bearing internal abrasion are accelerated.
The application provides an air pressure balance type four-row tapered roller bearing, which adopts the following technical scheme:
the utility model provides a four rows of tapered roller bearings of atmospheric pressure balance formula, includes inner circle group and outer lane group, be provided with the installation clearance between the outside perisporium of inner circle group with the inboard perisporium of outer lane group, have four rows of roller mounting grooves in the installation clearance, the roller mounting groove internal rotation is equipped with a plurality of tapered rollers, every row all be provided with in the roller mounting groove and be used for relative fixation the annular holder of tapered roller, the both ends of installation clearance are sealed respectively through two sets of oil blanket group, be provided with a plurality of internal vent in the radial direction on the inner circle group, be provided with a plurality of external vent in the radial direction on the outer lane group, the both ends face of outer lane group all is provided with the atmospheric pressure balance hole, the atmospheric pressure balance hole internal vent with external vent all with the installation clearance intercommunication and inside all are filled with ventilative and impermeable grease material, the quantity of external vent is between 4-14, and a plurality of external vent is arranged around the central axis symmetry interval of bearing, the interval between the adjacent internal vent is 0.2-0.4 times of group radius.
In one technical scheme of the application, the inner surface of the inner ring group is provided with spiral grease grooves, and each circle of spiral grease grooves is correspondingly provided with 3-8 inner vent holes which are uniformly distributed at intervals.
In one possible technical solution of the present application, the inner ventilation holes on the adjacent turns of the spiral grease grooves are arranged in a staggered manner.
In an achievable technical scheme of the application, the bearing is divided into a first load area, a second load area, a third load area and a fourth load area by four rows of tapered rollers, a part of the outer vent holes are uniformly and alternately distributed on a separation line of the first load area and the second load area, the rest of the outer vent holes are uniformly and alternately distributed on a separation line of the third load area and the fourth load area, and 4-7 outer vent holes are respectively corresponding to the two separation lines.
In one technical scheme of the application, a first high-carbon alloy steel sleeve is arranged in the inner vent hole, a second high-carbon alloy steel sleeve is arranged in the outer vent hole, and the first high-carbon alloy steel sleeve and the second high-carbon alloy steel sleeve are filled with the breathable and oil-proof material.
In one possible technical solution of the present application, the breathable and oil-impermeable material is a nanocoating sponge, a polypropylene nanocomposite or a microporous PET breathable material.
In an implementation technical scheme of the application, the inner ring group comprises a first inner ring and a second inner ring, the first inner ring and the second inner ring respectively correspond to two rows of tapered rollers, an inner sealing groove is formed at the joint of the inner side walls of the first inner ring and the second inner ring, and an inner diameter sealing ring is embedded and fixed in the inner sealing groove.
In one technical scheme of the application, the inner diameter sealing ring comprises an inner ring framework and an inner ring rubber layer, wherein the inner ring rubber layer is wrapped on the outer surface of the inner ring framework, and a notch is formed in one corner of the inner ring rubber layer for leakage of one corner of the inner ring framework.
In one possible technical scheme of the application, the outer ring group comprises a center outer ring, two side outer rings, two end check rings and two outer space rings, one outer space ring is clamped between one end of the center outer ring and one side outer ring, the other outer space ring is clamped between the other end of the center outer ring and the other side outer ring, the two end check rings are respectively positioned at two end surfaces of the bearing, the air pressure balance hole is formed in the end check rings, the outer vent hole is formed in the outer space ring, and the oil seal group is arranged between the inner side of the end check ring and the outer side of the inner ring group.
In one technical scheme of the application, the oil seal group comprises an oil seal framework, an oil seal rubber layer and a tightening spring, wherein the oil seal rubber layer is wrapped on the outer side face of the oil seal framework, an annular groove corresponding to the tightening spring is arranged on the oil seal rubber layer, one end face of the oil seal rubber layer is abutted against the outer side peripheral wall of the inner ring group through the tightening spring, and the other end face of the oil seal rubber layer is abutted against the inner side peripheral wall of the outer ring group through the oil seal framework.
In summary, the present application includes at least one of the following beneficial technical effects:
Through addding atmospheric pressure balance hole, a plurality of internal vent, a plurality of external vent, combine the tandem effect of installation clearance to get up above-mentioned all holes, because ventilative and the good gas permeability of imperviousness grease material, can make the inboard of bearing, outside and terminal surface keep unanimously, keep atmospheric pressure balanced state promptly throughout the use, thereby the grease in the bearing installation clearance, the grease of bearing inner peripheral wall, the grease of bearing outer peripheral wall all is difficult for producing the leakage phenomenon because of the atmospheric pressure difference, outside pollutant and granule also are difficult for getting into inside the bearing because of the pressure difference after the cooling, prevent effectively that inside grease pollution from becoming invalid and bearing inside wearing and tearing, ventilative and imperviousness grease material still has the characteristic that separates grease infiltration, be difficult for leading to the grease in the bearing installation clearance, the grease of bearing inner peripheral wall, the grease emergence cluster oil phenomenon of bearing outer peripheral wall, the bearing is difficult fragile, the life of bearing has been prolonged by a wide margin.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a pneumatic balance type four-row tapered roller bearing according to an embodiment of the present application.
FIG. 2 is a schematic diagram of an oil seal assembly according to an embodiment of the present application.
FIG. 3 is a schematic view of the structure of an inner diameter seal ring in an embodiment of the application.
Fig. 4 is a schematic view of the first high carbon alloy steel sleeve and its interior according to an embodiment of the present application.
Fig. 5 is a schematic view of the second high carbon alloy steel sleeve and its interior according to an embodiment of the present application.
Reference numerals illustrate:
1. An inner ring group; 11 parts of a first inner ring, 12 parts of a second inner ring, 13 parts of an inner diameter sealing ring, 131 parts of an inner ring framework, 132 parts of an inner ring rubber layer, 1321 parts of a notch;
2. the outer ring group comprises a 21, a center outer ring, a 22, an edge outer ring, a 23, an end retainer ring, a 24, an outer spacer ring and a 25 and O-shaped ring;
3. Tapered rollers;
4. An annular retainer;
5. An oil seal group; 51, an oil seal framework, 52, an oil seal rubber layer, 53 and a tightening spring;
6. breathable and grease impermeable materials;
7. a first high carbon alloy steel sleeve;
8. a second high carbon alloy steel sleeve;
100. Spiral grease groove, 200 parts of installation clearance, 300 parts of inner vent hole, 400 parts of outer vent hole, 500 parts of air pressure balance hole.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The application is described in further detail below with reference to fig. 1-5.
The embodiment of the application discloses an air pressure balance type four-row tapered roller bearing. Referring to fig. 1 to 5, the air pressure balance type four-row tapered roller bearing comprises an inner ring group 1 and an outer ring group 2, a mounting gap 200 is arranged between the outer side peripheral wall of the inner ring group 1 and the inner side peripheral wall of the outer ring group 2, four rows of roller mounting grooves are arranged in the mounting gap 200, a plurality of tapered rollers 3 are rotatably assembled in the roller mounting grooves, annular retainers 4 for fixing the tapered rollers 3 are arranged in each row of roller mounting grooves, two ends of the mounting gap 200 are respectively sealed through two groups of oil seal groups 5, a plurality of inner vent holes 300 are arranged on the inner ring group 1 in the radial direction, a plurality of outer vent holes 400 are arranged on the outer ring group 2 in the radial direction, air pressure balance holes 500, the inner vent holes 300 and the outer vent holes 400 are all communicated with the mounting gap 200, air-permeable and oil-impermeable materials 6 are filled in the inner side of the outer ring group 2, the number of the outer vent holes 400 is between 4 and 14, the plurality of the outer vent holes 400 are symmetrically arranged around the central axis of the bearing at intervals, and the interval between the adjacent inner vent holes 300 is 0.2 to 0.4 times the radius of the inner ring group 1.
In order to ensure that more grease can be loaded on the inner peripheral wall of the bearing to improve the lubrication characteristic and reduce the abrasion, the inner surface of the inner ring set 1 is provided with spiral grease grooves 100, and each circle of spiral grease grooves 100 is correspondingly provided with 3-8 inner vent holes 300 which are uniformly distributed at intervals, wherein the inner vent holes 300 on adjacent circles of spiral grease grooves 100 are arranged in a staggered manner. In this embodiment, the open end of the spiral grease groove 100 does not extend to the end of the inner race 1, and in other embodiments, the open end of the spiral grease groove 100 may extend to both ends of the inner race 1 according to specific requirements.
The plurality of inner ventilation holes 300 which are in spiral line and staggered in a crossed manner are distributed more uniformly and comprehensively, so that the bearing inner peripheral wall is communicated with the mounting gap 200 comprehensively and keeps a ventilation state, and meanwhile, the structural distribution is uniform, and the influence on the structural strength of the inner ring set 1 is smaller.
In this embodiment, the tapered roller 3 divides the bearing into a first load region, a second load region, a third load region and a fourth load region, a part of the outer ventilation holes 400 are uniformly distributed at intervals on the separation line of the first load region and the second load region, the rest of the outer ventilation holes 400 are uniformly distributed at intervals on the separation line of the third load region and the fourth load region, and 4-7 outer ventilation holes 400 are respectively corresponding to the two separation lines.
The outer vent hole 400 and the inner vent hole 300 designed in the above way are more convenient for processing and manufacturing the bearing before assembling, and the outer vent hole 400 can be used as an oil filling hole before filling the breathable and oil-impermeable grease material 6, and only after assembling, the breathable and oil-impermeable grease material 6 is filled for sealing, so that one hole can be multipurpose.
In order to reduce the adverse effect of drilling on the structural strength of the inner ring set 1 and the outer ring set 2, a first high-carbon alloy steel sleeve 7 is arranged in the inner vent 300, a second high-carbon alloy steel sleeve 8 is arranged in the outer vent 400, and the first high-carbon alloy steel sleeve 7 and the second high-carbon alloy steel sleeve 8 are filled with a gas-permeable and oil-impermeable material 6, so that the inner end of the first high-carbon alloy steel sleeve 7 is designed to be a concave arc structure in order to adapt to the structure of the spiral oil groove 100, and see fig. 4 in detail. Before the first high-carbon alloy steel sleeve 7 and the second high-carbon alloy steel sleeve 8 are assembled in an interference mode, the first high-carbon alloy steel sleeve 7 and the second high-carbon alloy steel sleeve 8 can be filled with the breathable and oil-proof materials 6 in advance, so that manufacturing and assembling difficulties are reduced.
In this embodiment, the breathable and impermeable grease material 6 is a nano-coated sponge, a polypropylene nanocomposite or a microporous PET breathable material, and the above materials are selected to have good chemical stability, not only are not easy to deteriorate due to high temperature caused by friction, but also have good breathability and good barrier property to grease.
In this embodiment, based on current production facility, in order to reduce the production preparation degree of difficulty of inner circle group 1, inner circle group 1 includes first inner circle 11 and second inner circle 12, and first inner circle 11 and second inner circle 12 correspond two rows of tapered rollers 3 respectively, and the inside wall junction of first inner circle 11 and second inner circle 12 is provided with interior seal groove, and interior seal inslot is embedded to be fixed with internal diameter sealing washer 13, and the inboard leakproofness of this bearing has been promoted in the production degree of difficulty low, the assembly degree of difficulty is not high in addition through increasing interior seal groove and internal diameter sealing washer 13 in the aforesaid split type inner circle group 1.
The inner diameter sealing ring 13 comprises an inner ring framework 131 and an inner ring rubber layer 132, the inner ring rubber layer 132 wraps the outer surface of the inner ring framework 131, and a notch 1321 is arranged at one corner of the inner ring rubber layer 132 for leakage of one corner of the inner ring framework 131. The inner diameter sealing ring 13 with the design is simple in manufacture, firm and stable in structure and convenient to assemble, and due to the design of the notch 1321, a certain movable space can be provided for the inner diameter sealing ring 13, so that structural damage caused by excessive assembly of the inner diameter sealing ring 13 is effectively avoided.
The inner ring rubber layer 132 meets JB/T6639 standard requirements, and the inner ring skeleton 131 and the inner ring rubber layer 132 are firmly bonded, wherein the inner ring skeleton 131 is deburred and the surface is subjected to phosphating rust-proof treatment, and the surface roughness of the inner ring rubber layer 132 reaches Ra1.6.
In this embodiment, based on the existing production equipment, in order to reduce the difficulty of producing and manufacturing the outer ring set 2, the outer ring set 2 includes a central outer ring 21, two side outer rings 22, two end portion retainer rings 23 and two outer retainer rings 24, one outer retainer ring 24 is clamped between one end of the central outer ring 21 and one side outer ring 22, the other outer retainer ring 24 is clamped between the other end of the central outer ring 21 and the other side outer ring 22, the two end portion retainer rings 23 are respectively located at two end surfaces of the bearing, the air pressure balance hole 500 is formed in the end portion retainer rings 23, the outer vent holes 400 are formed in the outer retainer rings 24, and the oil seal set 5 is installed between the inner side of the end portion retainer rings 23 and the outer side of the inner ring set 1. The air pressure balancing hole 500 has an L-shaped structure, and the inner end of the air pressure balancing hole 500 does not contact with the oil seal set 5, so as to ensure a good ventilation environment. Wherein the outer peripheral wall of the end collar 23 is further embedded with an O-ring 25 to seal as much as possible the grease between the outer peripheral wall of the bearing and the outer member.
The split outer ring group 2 is low in manufacturing difficulty and assembly difficulty, and the oil seepage possibility of the bearing is reduced by adding the oil seal group 5.
In this embodiment, the oil seal group 5 includes an oil seal skeleton 51, an oil seal rubber layer 52 and a tightening spring 53, the oil seal rubber layer 52 wraps the outer side surface of the oil seal skeleton 51, an annular groove corresponding to the tightening spring 53 is provided on the oil seal rubber layer 52, one end surface of the oil seal rubber layer 52 is abutted against the outer side peripheral wall of the inner ring group 1 through the tightening spring 53, and the other end surface of the oil seal rubber layer 52 is abutted against the inner side peripheral wall of the outer ring group 2 through the oil seal skeleton 51. The oil seal group 5 is simple in structure, firm in assembly, not easy to loosen, and has a sealing effect on grease, so that the possibility of oil seepage of the bearing is further reduced.
The oil seal rubber layer 52 and the inner ring rubber layer 132 should meet JB/T6639 standard requirements, and the oil seal skeleton 51 and the oil seal rubber layer 52 should be firmly bonded, wherein the oil seal skeleton 51 is deburred and the surface is phosphatized and rust-proof, and the surface roughness of the oil seal rubber layer 52 should reach Ra1.6.
The partial parameters of the air pressure balance type four-row tapered roller bearing in the embodiment of the application are as follows:
Size precision: class2, rotation precision: P5, rated load: cr=1670kn cor=3930kn, axial play: 0.36-0.45mm, radial play: 0.096-0.12mm, grease filling: mobilith SHC 460 (0.57±0.03 Kg), outer peripheral wall four of outer race set 2, and the like, and roman numerals I, II, III, IV are respectively marked to distinguish four load areas.
The air pressure balance type four-row tapered roller bearing has the following beneficial technical effects:
Through setting up atmospheric pressure balance hole 500, a plurality of internal vent 300, a plurality of external vent 400, combine the tandem effect of installation clearance 200 to communicate above-mentioned all holes, because ventilative and the good gas permeability of imperviousness grease material 6, can make the inside of bearing, outside and terminal surface keep unanimous, promptly remain atmospheric pressure balanced state throughout the use, thereby the grease in the bearing installation clearance 200, the grease of bearing inner peripheral wall, the grease of bearing outer peripheral wall all are difficult for producing the seepage phenomenon because of the atmospheric pressure difference, outside pollutant and granule are also difficult for getting into inside the bearing because of the pressure difference after the cooling, effectively prevent inside grease pollution inefficacy and bearing inside wearing and tearing, ventilative and imperviousness grease material 6 still has the characteristic that keeps off grease infiltration, be difficult for leading to the grease in the bearing installation clearance 200, the grease of bearing inner peripheral wall, the grease of bearing outer peripheral wall takes place the oil phenomenon of being crossed, the bearing is difficult for the bearing is fragile, the life of bearing has been prolonged by a wide margin.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.
Claims (10)
1. The utility model provides a four-row tapered roller bearing of air pressure balance type, its characterized in that includes inner circle group (1) and outer lane group (2), be provided with mounting gap (200) between the outside perisporium of inner circle group (1) and the inboard perisporium of outer lane group (2), have four rows of roller mounting groove in mounting gap (200), the rotatory assembly of roller mounting groove has a plurality of tapered rollers (3), each row be provided with in the roller mounting groove be used for relative fixation tapered roller (3) annular holder (4), the both ends of mounting gap (200) are sealed respectively through two sets of oil blanket group (5), be provided with a plurality of internal vent holes (300) along radial direction on inner circle group (1), be provided with a plurality of external vent holes (400) along radial direction on outer lane group (2), the both ends face of outer lane group (2) all is provided with air pressure balance hole (500), internal vent hole (300), external vent hole (400) all with mounting gap (200) intercommunication and inside seal up and the inside and be provided with the inner grease-impermeable material (4) and the number is arranged between the outer bearing (4) and is outer at the interval (14), the distance between the adjacent inner vent holes (300) is 0.2-0.4 times of the radius of the inner ring group (1).
2. The air pressure balance type four-row tapered roller bearing according to claim 1, wherein the inner surface of the inner ring group (1) is provided with spiral grease grooves (100), and each circle of the spiral grease grooves (100) is correspondingly provided with 3-8 inner vent holes (300) which are uniformly distributed at intervals.
3. The air pressure balance type four-row tapered roller bearing as claimed in claim 2, wherein the inner ventilation holes (300) on the adjacent turns of the spiral grease groove (100) are arranged in a staggered manner.
4. The air pressure balance type four-row tapered roller bearing according to claim 1, wherein four rows of tapered rollers (3) divide the bearing into a first load area, a second load area, a third load area and a fourth load area, a part of the outer vent holes (400) are uniformly distributed at intervals on a separation line of the first load area and the second load area, the rest of the outer vent holes (400) are uniformly distributed at intervals on a separation line of the third load area and the fourth load area, and 4-7 outer vent holes (400) are respectively corresponding to the two separation lines.
5. The air pressure balance type four-row tapered roller bearing according to claim 1, wherein a first high-carbon alloy steel sleeve (7) is arranged in the inner vent hole (300), a second high-carbon alloy steel sleeve (8) is arranged in the outer vent hole (400), and the first high-carbon alloy steel sleeve (7) and the second high-carbon alloy steel sleeve (8) are filled with the air-permeable and oil-impermeable material (6).
6. The air pressure balance type four-row tapered roller bearing according to claim 1, wherein the air-permeable and oil-impermeable material (6) is a nano-coated sponge, a polypropylene nanocomposite or a microporous PET air-permeable material.
7. The air pressure balance type four-row tapered roller bearing according to claim 1, wherein the inner ring group (1) comprises a first inner ring (11) and a second inner ring (12), the first inner ring (11) and the second inner ring (12) respectively correspond to two rows of tapered rollers (3), an inner sealing groove is formed at the joint of the inner side walls of the first inner ring (11) and the second inner ring (12), and an inner diameter sealing ring (13) is embedded and fixed in the inner sealing groove.
8. The air pressure balance type four-row tapered roller bearing according to claim 7, wherein the inner diameter sealing ring (13) comprises an inner ring framework (131) and an inner ring rubber layer (132), the inner ring rubber layer (132) is wrapped on the outer surface of the inner ring framework (131), and a notch (1321) is formed in one corner of the inner ring rubber layer (132) so that one corner of the inner ring framework (131) can leak out.
9. The air pressure balance type four-row tapered roller bearing according to claim 1, wherein the outer ring group (2) comprises a center outer ring (21), two side outer rings (22), two end retainer rings (23) and two outer spacer rings (24), one outer spacer ring (24) is clamped between one end of the center outer ring (21) and one side outer ring (22), the other outer spacer ring (24) is clamped between the other end of the center outer ring (21) and the other side outer ring (22), the two end retainer rings (23) are respectively positioned on two end faces of the bearing, the air pressure balance hole (500) is formed in the end retainer rings (23), the outer vent holes (400) are formed in the outer spacer rings (24), and the oil seal group (5) is mounted between the inner side of the end retainer rings (23) and the outer side of the inner ring group (1).
10. The air pressure balance type four-row tapered roller bearing according to claim 1, wherein the oil seal group (5) comprises an oil seal framework (51), an oil seal rubber layer (52) and a tightening spring (53), the oil seal rubber layer (52) is wrapped on the outer side surface of the oil seal framework (51), an annular groove corresponding to the tightening spring (53) is formed in the oil seal rubber layer (52), one end surface of the oil seal rubber layer (52) is abutted against the outer side peripheral wall of the inner ring group (1) through the tightening spring (53), and the other end surface of the oil seal rubber layer (52) is abutted against the inner side peripheral wall of the outer ring group (2) through the oil seal framework (51).
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| CN202510541781.3A CN120100815B (en) | 2025-04-28 | 2025-04-28 | Air pressure balanced four-row tapered roller bearings |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202510541781.3A CN120100815B (en) | 2025-04-28 | 2025-04-28 | Air pressure balanced four-row tapered roller bearings |
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| CN120100815A CN120100815A (en) | 2025-06-06 |
| CN120100815B true CN120100815B (en) | 2025-07-18 |
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| CN202510541781.3A Active CN120100815B (en) | 2025-04-28 | 2025-04-28 | Air pressure balanced four-row tapered roller bearings |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075903A (en) * | 1992-03-04 | 1993-09-08 | Skf有限公司 | Be mainly used in the sealed four row conical bearing on the rollers of rolling machine |
| CN101586613A (en) * | 2008-05-19 | 2009-11-25 | 瓦房店第一轧机轴承制造有限公司 | Four-row tapered roller bearing for rolling mill |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4142802A1 (en) * | 1991-12-23 | 1993-07-01 | Skf Gmbh | FOUR ROW BEARING BEARING |
| JP2000249137A (en) * | 1999-03-03 | 2000-09-12 | Nsk Ltd | Hydrodynamic bearing device |
| JP2006077962A (en) * | 2004-09-13 | 2006-03-23 | Nsk Ltd | Sealed tapered roller bearings |
| JP2007177863A (en) * | 2005-12-27 | 2007-07-12 | Ntn Corp | Bearing device for roll neck |
| JP2012255517A (en) * | 2011-06-10 | 2012-12-27 | Ntn Corp | Lubricating device for rolling bearing |
| CN202493583U (en) * | 2011-12-19 | 2012-10-17 | 大连国威轴承股份有限公司 | Four-row cylindrical roller bearing with sealed outer diameter |
| CN220825316U (en) * | 2023-09-27 | 2024-04-23 | 洛阳轴承控股有限公司 | Four-row tapered roller bearing for hot continuous rolling line working roller |
| CN221958013U (en) * | 2024-07-12 | 2024-11-05 | 山东航行万里汽车轴承有限公司 | Sealed four-row tapered roller bearing |
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- 2025-04-28 CN CN202510541781.3A patent/CN120100815B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075903A (en) * | 1992-03-04 | 1993-09-08 | Skf有限公司 | Be mainly used in the sealed four row conical bearing on the rollers of rolling machine |
| CN101586613A (en) * | 2008-05-19 | 2009-11-25 | 瓦房店第一轧机轴承制造有限公司 | Four-row tapered roller bearing for rolling mill |
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| CN120100815A (en) | 2025-06-06 |
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