CN114135568B - Heavy-duty double-row full-complement tapered roller bearing - Google Patents

Heavy-duty double-row full-complement tapered roller bearing Download PDF

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Publication number
CN114135568B
CN114135568B CN202111507390.8A CN202111507390A CN114135568B CN 114135568 B CN114135568 B CN 114135568B CN 202111507390 A CN202111507390 A CN 202111507390A CN 114135568 B CN114135568 B CN 114135568B
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China
Prior art keywords
ring
inner ring
outer ring
hardness
annular
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CN202111507390.8A
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Chinese (zh)
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CN114135568A (en
Inventor
朱晓宏
杨小兵
丁彬
何敏
时飞
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Jiangsu Wanda Special Bearing Co Ltd
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Jiangsu Wanda Special Bearing Co Ltd
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Priority to CN202111507390.8A priority Critical patent/CN114135568B/en
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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
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
    • F16C13/02—Bearings
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06—Surface hardening
    • C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
    • C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/34—Methods of heating
    • C21D1/42—Induction heating
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing 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
    • F16C33/58—Raceways; Race rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/583—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
    • F16C33/58—Raceways; Race rings
    • F16C33/60—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/62—Selection of substances
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/64—Special methods of manufacture
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
    • F16C33/6677—Details of supply of the liquid to the bearing, e.g. passages or nozzles from radial inside, e.g. via a passage through the shaft and/or inner ring
    • 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
    • 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
    • F16C33/7826—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of the opposing surface cooperating with the seal, e.g. a shoulder surface of a bearing ring
    • 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
    • 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
    • F16C2223/00—Surface treatments; Hardening; Coating
    • F16C2223/10—Hardening, e.g. carburizing, carbo-nitriding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2223/00—Surface treatments; Hardening; Coating
    • F16C2223/10—Hardening, e.g. carburizing, carbo-nitriding
    • F16C2223/18—Hardening, e.g. carburizing, carbo-nitriding with induction hardening
    • 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
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/50—Positive connections
    • F16C2226/62—Positive connections with pins, bolts or dowels
    • 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
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • F16C2240/46—Gap sizes or clearances
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

The invention relates to a reloading double-row full-complement tapered roller bearing, which comprises an outer ring, two inner rings, tapered rollers and metal sealing check rings, wherein an annular convex cone is designed on the inner side of the outer ring, the two inner rings are a left inner ring and a right inner ring respectively, annular rollaway nest which inclines inwards is designed on the outer sides of the left inner ring and the right inner ring respectively, the tapered rollers are fully filled between the outer ring and the left inner ring and between the outer ring and the right inner ring respectively, and the metal sealing check rings are respectively arranged on the two sides between the outer ring and the left inner ring and between the outer ring and the right inner ring; the outer ring and the metal sealing retainer ring are fixedly installed together through the retainer ring for holes. The full-automatic tapered roller has the advantages of ingenious design and compact structure, two groups of full-automatic tapered rollers which are inclined relatively do not use a retainer, and the maximization of the assembly quantity is realized, so that the maximum load bearing capacity is realized; the retainer ring for the hole and the metal sealing retainer ring can realize the position maintenance of the inner ring, and the double-row full-complement tapered roller bearing before installation can not be separated; and meanwhile, good sealing of the roller bearing is realized.

Description

Heavy-duty double-row full-complement tapered roller bearing
Technical Field
The invention relates to the field of bearings, in particular to a heavy-duty double-row full-complement tapered roller bearing.
Background
The outer ring of the roller bearing adopts a full-complement cylindrical roller bearing with thicker outer ring wall, the outer diameter surface of the roller is cylindrical and arc-shaped, and the roller bearing can be matched with the raceway surface according to the design of the application. With this outer race, the rollers can roll directly on the raceways and can bear heavier loads and impact loads.
The prior roller bearing product has the following defects:
1. the cylindrical roller structure is adopted, the bearing axial force is very small, and when the bearing axial force is applied, the roller and the inner ring flange are in sliding friction.
2. The outer ring material is a carburizing steel material, only a high-hardness layer and a low-hardness zone are provided after carburizing and quenching, and a hardness transition zone is not provided, so that the hardness is changed suddenly from high hardness to low hardness, and the outer ring material is easy to break under the action of working condition impact force.
3. The carburized high-hardness layer of the outer ring material and the carburized steel material is generally about 2.0mm, so that the hardened layer of the carbon steel material is intended, and the heat treatment cost is increased by times.
Disclosure of Invention
In order to solve the technical problems, the invention provides a double-row full-complement tapered roller bearing which is ingenious in design and compact in structure, and the maximization of the roller assembly amount is realized without a retainer, so that the maximum load bearing capacity is realized, and the bearing is not scattered before installation.
The technical scheme of the invention is as follows:
The double-row full-complement tapered roller bearing comprises an outer ring, two inner rings, tapered rollers and a metal sealing retainer ring, wherein an annular convex cone is designed on the inner side of the outer ring, the two inner rings are a left inner ring and a right inner ring respectively, annular rollaway nest which inclines inwards is designed on the outer sides of the left inner ring and the right inner ring respectively, the left inner ring and the right inner ring are simultaneously designed on the inner side of the outer ring, the tapered rollers are fully filled between the outer ring and the left inner ring and between the right inner ring respectively, so that two groups of full-complement tapered rollers which are symmetrical with each other are formed, and the metal sealing retainer ring is respectively installed on two sides between the outer ring and the left inner ring and between the right inner ring; the outer ring and the metal sealing retainer ring are fixedly installed together through the retainer ring for holes, the inner side of the annular convex cone of the outer ring is respectively designed with an inner annular positioning groove close to two ends, the outer side of the metal sealing retainer ring is also provided with an outer annular positioning groove, the outer side of the retainer ring for holes is clamped in the inner annular positioning groove, and the inner side of the retainer ring for holes is clamped in the outer annular positioning groove.
The inner side of the metal sealing retainer ring is provided with an inner step, the outer sides of the left inner ring and the right inner ring close to the end parts are respectively provided with an outer step, and the inner step of the metal sealing retainer ring is in snap fit with the outer step of the inner ring on the same side.
The outer ring comprises a low hardness zone, a hardness transition zone and a high hardness zone, the outer circular surface of the outer ring and the zone close to the middle position are the low hardness zone, the annular convex cone of the outer ring is positioned in the high hardness zone, and the hardness transition zone is arranged between the low hardness zone and the high hardness zone of the outer ring.
The double-row full complement tapered roller bearing comprises a left inner ring, a right inner ring, an axial gland, locking screws, a mounting shaft, an annular boss, a conical surface and an axial gland, wherein the mounting shaft is inserted into the left inner ring and the right inner ring simultaneously, the outer diameter of the mounting shaft is identical to the inner diameter of the inner ring, the rear end of the mounting shaft is further provided with the annular boss, the annular boss is blocked at the end part of the left inner ring, the front end of the mounting shaft is positioned in the right inner ring, the outer circumferential surface of the axial gland is designed into the conical surface, the conical surface is extruded at the inner chamfer of the end part of the right inner ring, and the axial gland is locked and mounted at the front end of the mounting shaft through a plurality of locking screws.
The outer circle surface of the installation shaft is close to the annular boss, an annular groove is formed in the position, close to the annular boss, of the installation shaft, an oil injection hole is formed in the end portion of the front end of the installation shaft, the oil injection hole is communicated with the bottom of the annular groove through the inclined hole, at least 3 radial oil grooves are uniformly formed in the contact position between the left inner ring and the right inner ring, the outer ends of the radial oil grooves are communicated with the annular rollaway nest positions of the left inner ring and the right inner ring, and the lower ends of the radial oil grooves are communicated with the annular groove.
The outer ring is made of carbon steel.
The heat treatment steps of the low hardness zone, the hardness transition zone and the high hardness zone are as follows:
Step one: whole heat treatment quenching and tempering of outer lane of carbon steel material
Quenching and tempering the outer ring, adopting water as a cooling medium, and quenching at the temperature: heat preservation is carried out for 55 minutes at 820-850 ℃; tempering temperature is 450 ℃, and preserving heat for 3 hours; the external ring of carbon steel material has hardness of HRC40-45 to obtain sorbite structure.
Step two: induction heat treatment
Heat treatment part: the annular convex cone surface of the outer ring.
The induction heat treatment is carried out by adopting a heating mode of medium-frequency electromagnetic induction local surface heating, a double-path electromagnetic induction coil is close to an annular convex cone of the outer ring, and the shape of the electromagnetic induction coil is consistent with the shape of the annular convex cone; because the annular convex cone forms an awl sharp angle, the interval distance between two circles of the two-way electromagnetic induction coil is increased, so that the sharp angle thermal effect during induction heating is prevented.
According to the requirement of the hardening layer depth of the reloaded double-row full-complement tapered roller bearing product, an intermediate frequency power supply with the direct current voltage of 4.9KHz and 500V is selected, intermediate frequency direct current 320A is introduced into an electromagnetic induction coil, induction heating is carried out on an annular convex cone of an outer ring, after the heating reaches the quenching temperature of 820-850 ℃, the outer ring rapidly falls into a quenching medium through a spiral lifting mechanism to be cooled, and an external cooling system is used for carrying out auxiliary cooling on an inner cavity of the outer ring, so that the rapid cooling effect is achieved; heating for 68 seconds and cooling for 70 seconds to adjust the depth of a hardening layer in a high-hardness zone and the depth of a hardness transition zone; the hardness HRC58-62 of the hardening layer in the high hardness area and the depth of the hardening layer are not less than 1/5 of the wall thickness of the outer ring, and reach more than 5 mm; a hardness transition zone of 7-12mm, wherein the hardness of the hardness transition zone is gradually reduced from HV50 from inside to outside; the hardness of the low hardness region keeps the original quenched and tempered hardness HRC40-45.
The included angle alpha between the central line of the tapered roller and the central line of the inner ring is 0-15 degrees.
The circumferential clearance of the full tapered roller is between 0.05Dw and 0.65 Dw.
The outer circular surface of the outer ring is a flange outer cambered surface.
The invention has the advantages that:
1. The design is ingenious, the structure is compact, two groups of full tapered rollers which incline relatively are filled, the retainer is not used, and the maximization of the filling quantity is realized, so that the maximum load bearing capacity is realized.
2. The two-row full-complement tapered roller bearing is inseparable, stable in structure and free from falling apart before installation and use by forming a roller bearing unit by one outer ring, two inner rings, two groups of symmetrical full-complement tapered rollers, two metal sealing check rings and two hole check rings; the retainer ring for the hole and the metal sealing retainer ring can realize the position maintenance of the inner ring, and the double-row full-complement tapered roller bearing before installation can not be separated; and meanwhile, good sealing of the roller bearing is realized.
3. The axial gland is designed, the axial assembly on the mounting shaft is realized through the locking screw, and the axial compression of the two parts of the left inner ring and the right inner ring is kept.
4. At least 3 groups of radial oil grooves are processed at the contact position of the left inner ring and the right inner ring, and oil supply and supply are carried out on the full-complement tapered roller bearing, so that the tapered roller lubrication effect is good.
5. The circumferential gap of the full tapered roller is selected from 0.05Dw to 0.65Dw, and Dw is the diameter of the roller.
An excessive clearance (including the use of retainers) reduces the assembly of tapered rollers and reduces bearing loads.
An excessively small gap causes interference between adjacent door bars when rotated, thereby increasing the rotational resistance of the roller bearing.
6. Two groups of opposite full-complement round tapered rollers can realize the automatic adjustment of the cone inclination angle of the annular convex cone of the outer ring by adjusting the included angle alpha of the central position of the rollers; the overlarge alpha angle is unfavorable for simultaneous induction quenching heat treatment processing of two conical surface raceways of the outer ring; and secondly, the ratio of the radial load and the axial load of the roller bearing can be autonomously distributed.
7. The outer circular surface of the outer ring is a flange outer cambered surface, and when the track surface rotates and rolls, the contact stress with the track surface can be reduced.
8. The outer ring is made of medium carbon steel, and three hardness distribution areas of the outer ring are realized through a special heat treatment process; the high hardness region is used for meeting the service life requirement of the bearing; the low hardness region is used for contact protection of the moving track surface and is used for meeting the hardness matching of the outer circle surface of the outer ring and the track surface; the hardness transition region of the core realizes the hardness transition between the high hardness region and the low hardness region, and in order to prevent the hardness fall of the high hardness region and the hardness fall of the substitution hardness region from being too large, the optimal combination of the strength and the impact resistance of the outer ring is realized by using a gradual change process, so that the high strength performance of the roller bearing under the high load condition is met.
Drawings
Fig. 1 is a schematic diagram of the present invention.
Detailed Description
Referring to fig. 1, a reinstalling double-row full tapered roller bearing comprises an outer ring 1, two inner rings, tapered rollers 2 and a metal sealing retainer ring 3, wherein an annular convex cone 4 is designed on the inner side of the outer ring 1, the two inner rings are a left inner ring 5 and a right inner ring 6 respectively, annular raceways 7 inclining inwards are designed on the outer sides of the left inner ring 5 and the right inner ring 6 respectively, the left inner ring 5 and the right inner ring 6 are simultaneously designed on the inner side of the outer ring 1, tapered rollers 2 are fully filled between the outer ring 1 and the left inner ring 5 and the right inner ring 6 respectively, two groups of mutually symmetrical full tapered rollers 2 are formed, and the metal sealing retainer ring 3 is respectively installed on two sides between the outer ring 1 and the left inner ring 5 and the right inner ring 6; the outer ring 1 and the metal sealing retainer ring 3 are fixedly installed together through a hole retainer ring 8, an inner annular positioning groove is respectively designed at the positions, close to two ends, of the inner side of the annular convex cone 4 of the outer ring 1, an outer annular positioning groove is also formed in the outer side of the metal sealing retainer ring 3, the outer side of the hole retainer ring 8 is clamped in the inner annular positioning groove, and the inner side of the hole retainer ring 8 is clamped in the outer annular positioning groove. The conical surface of the annular convex cone is a raceway surface, the inner side of the tapered roller is positioned in the annular raceway, and the outer side of the tapered roller is matched with the conical surface of the annular convex cone.
The inner side of the metal sealing retainer ring 3 is provided with an inner step, the outer sides of the left inner ring 5 and the right inner ring 6 close to the end parts are respectively provided with an outer step, and the inner step of the metal sealing retainer ring 3 is in snap fit with the outer step of the inner ring at the same side.
The outer ring 1 comprises a low hardness zone 11, a hardness transition zone 12 and a high hardness zone 13, the outer circular surface of the outer ring 1 and a zone close to the middle position are the low hardness zone 11, the annular convex cone 4 of the outer ring 1 is positioned to be the high hardness zone 13, and the hardness transition zone 12 is arranged between the low hardness zone 11 and the high hardness zone 13 of the outer ring 1.
The heavy-duty double-row full complement tapered roller bearing also comprises an axial gland 9, locking screws 14 and a mounting shaft 10, wherein the mounting shaft 10 is simultaneously inserted into the left inner ring 5 and the right inner ring 6, the outer diameter of the mounting shaft 10 is the same as the inner diameter of the inner ring, the rear end of the mounting shaft 10 is further provided with an annular boss 15, the annular boss 15 is blocked at the end part of the left inner ring 5, the front end of the mounting shaft 10 is positioned in the right inner ring 6, the outer circular surface of the axial gland 9 is designed into a conical surface, the conical surface is extruded at the inner chamfer of the end part of the right inner ring 6, and the axial gland 9 is locked and mounted at the front end of the mounting shaft 10 through a plurality of locking screws 14. The inner side of the axial gland can be provided with a cylindrical boss which can be inserted into an inner hole of the right inner ring, so that the axial gland can be conveniently installed and positioned; and a chamfer is designed at the position of the inner hole port of the inner ring, so that the inner ring is convenient to install and match.
The outer circular surface of the installation shaft 10 is provided with an annular groove 16 at a position close to the annular boss 15, the front end part of the installation shaft 10 is provided with an oil injection hole 17, the oil injection hole 17 is communicated with the bottom of the annular groove 16 through an inclined hole 18, the contact position between the left inner ring 5 and the right inner ring 6 is uniformly provided with at least 3 radial oil grooves 19, the outer ends of the radial oil grooves 19 are communicated with the annular rollaway nest 7 of the left inner ring 5 and the right inner ring 6, and the lower ends of the radial oil grooves are communicated with the annular groove 16.
The outer ring 1 is made of carbon steel.
The heat treatment steps of the low hardness region 11, the hardness transition region 12 and the high hardness region 13 are as follows,
Step one: whole heat treatment quenching and tempering of outer ring 1 of carbon steel material
Quenching and tempering the outer ring 1, wherein water is used as a cooling medium, and the quenching temperature is as follows: heat preservation is carried out for 55 minutes at 820-850 ℃; tempering temperature is 450 ℃, and preserving heat for 3 hours; the hardness of the outer ring 1 of the carbon steel material in the body reaches HRC40-45, and the sorbite structure is obtained.
Step two: induction heat treatment
Heat treatment part: the surface of the annular convex cone 4 of the outer ring 1.
The heating mode of induction heat treatment is intermediate frequency electromagnetic induction local surface heating, a double-path electromagnetic induction coil is close to the annular convex cone 4 of the outer ring 1, and the shape of the electromagnetic induction coil is consistent with that of the annular convex cone 4; because the annular convex cone 4 forms an awl sharp angle, the interval distance between two circles of the two-way electromagnetic induction coil is increased, so that the sharp angle thermal effect during induction heating is prevented; and (3) preventing the sharp corner heat effect, and in the heating process, observing whether the degree of reddening of the heating of the sharp corners and the positions of the two sides is consistent by a worker, if the reddening of the middle sharp corner is too fast, increasing the distance between the two circles of the two-way electromagnetic induction coil by a little until the color of the middle sharp corner and the color of the conical surfaces (raceway surfaces) of the two sides are consistent, namely the temperature rise is consistent.
According to the requirement of the depth of a hardened layer of a product of the double-row full-complement tapered roller bearing, an intermediate frequency power supply with the direct current voltage of 4.9KHz and 500V is selected, intermediate frequency direct current 320A is introduced into an electromagnetic induction coil, the annular convex cone 4 of the outer ring 1 is subjected to induction heating, after the heating reaches the quenching temperature of 820-850 ℃, the outer ring 1 rapidly falls into a quenching medium through a spiral lifting mechanism to be cooled, and an inner cavity of the outer ring 1 is subjected to auxiliary cooling through an external cooling system, so that a rapid cooling effect is achieved; the depth of the hardening layer of the high hardness region 13 and the depth of the hardness transition region 12 are adjusted by heating time 68 seconds and cooling time 70 seconds; the hardness HRC58-62 of the hardening layer in the high hardness area 13, and the depth of the hardening layer is not less than 1/5 of the wall thickness of the outer ring 1, reaching more than 5 mm; the hardness transition area is 7-12mm, and the hardness of the hardness transition area 12 is gradually reduced from HV50 from inside to outside; the hardness of the low hardness region 11 keeps the original quenched and tempered hardness HRC40-45.
The included angle alpha between the central line of the tapered roller 2 and the central line of the inner ring is 0-15 degrees.
The circumferential clearance of the full complement tapered roller 2 is between 0.05Dw and 0.65 Dw.
The outer circular surface of the outer ring 1 is a flange outer cambered surface.
In the application occasion of the heavy-duty double-row full-complement tapered roller bearing, a bearing outer ring typified by a forklift portal moves on a linear track surface. The shaft is of a cantilever type, that is, one end of the shaft is fixed, the normal bearing is not well installed in the direction, and the heavy-duty double-row full-complement tapered roller bearing is adopted. But also includes applications such as guide roller bearings when the elevator is lifted.

Claims (1)

1. The double-row full-complement tapered roller bearing is characterized by comprising an outer ring (1), two inner rings, tapered rollers (2) and a metal sealing retainer ring (3), wherein an annular convex cone (4) is designed on the inner side of the outer ring (1), the two inner rings are a left inner ring (5) and a right inner ring (6), annular raceways (7) which incline inwards are respectively designed on the outer sides of the left inner ring (5) and the right inner ring (6), the left inner ring (5) and the right inner ring (6) are simultaneously designed on the inner side of the outer ring (1), the tapered rollers (2) are fully filled between the outer ring (1) and the left inner ring (5) and the right inner ring (6) respectively, two groups of full-complement tapered rollers (2) which are symmetrical with each other are formed, and the metal sealing retainer ring (3) is respectively installed on two sides between the outer ring (1) and the left inner ring (5) and the right inner ring (6); the outer ring (1) and the metal sealing retainer ring (3) are fixedly installed together through a hole retainer ring (8), an inner annular positioning groove is respectively designed at the inner side of the annular convex cone (4) of the outer ring (1) close to two ends, an outer annular positioning groove is also formed in the outer side of the metal sealing retainer ring (3), the outer side of the hole retainer ring (8) is clamped in the inner annular positioning groove, and the inner side of the hole retainer ring (8) is clamped in the outer annular positioning groove; the inner side of the metal sealing retainer ring (3) is provided with an inner step, the outer sides of the left inner ring (5) and the right inner ring (6) close to the end parts are respectively provided with an outer step, and the inner step of the metal sealing retainer ring (3) is in snap fit with the outer step of the inner ring at the same side; the outer ring (1) comprises a low hardness zone (11), a hardness transition zone (12) and a high hardness zone (13), the outer circular surface of the outer ring (1) and a zone close to the middle position are the low hardness zone (11), the position of the annular convex cone (4) of the outer ring (1) is the high hardness zone (13), and the hardness transition zone (12) is arranged between the low hardness zone (11) and the high hardness zone (13) of the outer ring (1); the double-row full-complement tapered roller bearing comprises a left inner ring (5) and a right inner ring (6), wherein the left inner ring is provided with a plurality of locking screws (14), the right inner ring is provided with a plurality of annular bosses (15), the front end of the mounting shaft (10) is positioned in the right inner ring (6), the outer circumferential surface of the axial gland (9) is designed into a conical surface, the conical surface is extruded at the inner chamfer of the end part of the right inner ring (6), and the axial gland (9) is locked and installed at the front end of the mounting shaft (10) through the plurality of locking screws (14); an annular groove (16) is formed in the position, close to the annular boss (15), of the outer circular surface of the mounting shaft (10), an oil injection hole (17) is formed in the front end portion of the mounting shaft (10), the oil injection hole (17) is communicated with the bottom of the annular groove (16) through an inclined hole (18), at least 3 radial oil grooves (19) are uniformly formed in the contact position between the left inner ring (5) and the right inner ring (6), the outer ends of the radial oil grooves (19) are communicated with the annular rollaway nest (7) of the left inner ring (5) and the right inner ring (6), and the lower ends of the radial oil grooves are communicated with the annular groove (16); the outer ring (1) is made of carbon steel; the heat treatment steps of the low hardness zone, the hardness transition zone and the high hardness zone are as follows,
Step one: the whole heat treatment tempering of the outer ring of the carbon steel material,
Quenching and tempering the outer ring, adopting water as a cooling medium, and quenching at the temperature: heat preservation is carried out for 55 minutes at 820-850 ℃; tempering temperature is 450 ℃, and preserving heat for 3 hours; the in-vivo hardness of the outer ring of the carbon steel material reaches HRC40-45, so as to obtain sorbite structure;
step two: the induction heat treatment is carried out to obtain a product,
Heat treatment part: an annular convex cone surface of the outer ring;
The induction heat treatment is carried out by adopting a heating mode of medium-frequency electromagnetic induction local surface heating, a double-path electromagnetic induction coil is close to an annular convex cone of the outer ring, and the shape of the electromagnetic induction coil is consistent with the shape of the annular convex cone; because the annular convex cone forms an awl sharp angle, the interval distance between two circles of the two-way electromagnetic induction coil is increased, so that the sharp angle thermal effect during induction heating is prevented;
According to the requirement of the hardening layer depth of the reloaded double-row full-complement tapered roller bearing product, an intermediate frequency power supply with the direct current voltage of 4.9KHz and 500V is selected, intermediate frequency direct current 320A is introduced into an electromagnetic induction coil, induction heating is carried out on an annular convex cone of an outer ring, after the heating reaches the quenching temperature of 820-850 ℃, the outer ring rapidly falls into a quenching medium through a spiral lifting mechanism to be cooled, and an external cooling system is used for carrying out auxiliary cooling on an inner cavity of the outer ring, so that the rapid cooling effect is achieved; heating for 68 seconds and cooling for 70 seconds to adjust the depth of a hardening layer in a high-hardness zone and the depth of a hardness transition zone; the hardness HRC58-62 of the hardening layer in the high hardness area and the depth of the hardening layer are not less than 1/5 of the wall thickness of the outer ring, and reach more than 5 mm; a hardness transition zone of 7-12mm, wherein the hardness of the hardness transition zone is gradually reduced from HV50 from inside to outside; the hardness of the low hardness region keeps the original quenched and tempered hardness HRC40-45; the included angle alpha between the central line of the tapered roller (2) and the central line of the inner ring is 0-15 degrees; the circumferential clearance of the full-complement tapered roller (2) is between 0.05Dw and 0.65 Dw; the outer circular surface of the outer ring (1) is a flange outer cambered surface.
CN202111507390.8A 2021-12-10 2021-12-10 Heavy-duty double-row full-complement tapered roller bearing Active CN114135568B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010014771A1 (en) * 2010-04-13 2011-10-13 Schaeffler Technologies Gmbh & Co. Kg Double-row tapered roller bearing for use in wind power plant, comprises outer bearing ring, inner bearing ring, and multiple rollers arranged between two bearing rings next to each other in two rows
CN102927120A (en) * 2012-11-15 2013-02-13 江苏万达特种轴承有限公司 Composite roller wheel with full complement tapered rollers
JP2015227671A (en) * 2014-05-30 2015-12-17 日本精工株式会社 Sealing-type rolling bearing
CN106755916A (en) * 2015-11-25 2017-05-31 青岛格润得新型材料有限公司 The rolling bearing manufactured using special thermal treatment technique
CN107110208A (en) * 2014-12-16 2017-08-29 斯凯孚公司 Bearing components and manufacture method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101501353B (en) * 2006-08-04 2012-03-28 日本精工株式会社 Double row tapered roller bearing unit
WO2011012667A1 (en) * 2009-07-31 2011-02-03 Aktiebolaget Skf Rolling bearing assembly having a radial shaft seal

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010014771A1 (en) * 2010-04-13 2011-10-13 Schaeffler Technologies Gmbh & Co. Kg Double-row tapered roller bearing for use in wind power plant, comprises outer bearing ring, inner bearing ring, and multiple rollers arranged between two bearing rings next to each other in two rows
CN102927120A (en) * 2012-11-15 2013-02-13 江苏万达特种轴承有限公司 Composite roller wheel with full complement tapered rollers
JP2015227671A (en) * 2014-05-30 2015-12-17 日本精工株式会社 Sealing-type rolling bearing
CN107110208A (en) * 2014-12-16 2017-08-29 斯凯孚公司 Bearing components and manufacture method
CN106755916A (en) * 2015-11-25 2017-05-31 青岛格润得新型材料有限公司 The rolling bearing manufactured using special thermal treatment technique

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