CN113027912A - Non-circular outer ring rolling bearing - Google Patents

Non-circular outer ring rolling bearing Download PDF

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Publication number
CN113027912A
CN113027912A CN202110472919.0A CN202110472919A CN113027912A CN 113027912 A CN113027912 A CN 113027912A CN 202110472919 A CN202110472919 A CN 202110472919A CN 113027912 A CN113027912 A CN 113027912A
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outer ring
bearing
circle
circular
rolling bearing
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CN113027912B (en
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林碧华
满维伟
王群
张翼
胡广存
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Hunan Aviation Powerplant Research Institute AECC
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Hunan Aviation Powerplant Research Institute AECC
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10—Complex mathematical operations
    • G06F17/11—Complex mathematical operations for solving equations, e.g. nonlinear equations, general mathematical optimization problems
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/17—Mechanical parametric or variational design

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  • Rolling Contact Bearings (AREA)

Abstract

The invention discloses a non-circular outer ring rolling bearing, which comprises a bearing inner ring, a bearing outer ring, rolling bodies and a retainer, wherein the bearing inner ring and the bearing outer ring are sleeved inside and outside, the rolling bodies are sequentially and evenly distributed between the bearing inner ring and the bearing outer ring at intervals, the retainer is used for installing the rolling bodies, the bearing outer ring is annular, a raceway of the outer ring is a circular curved surface with a circular radial section, and an excircle of the outer ring is a non-circular curved surface with a non-circular radial section; the bearing outer ring is used for being in interference fit with the bearing seat hole, so that the outer circle of the outer ring is extruded and deformed, the outer ring raceway is deformed, and the purpose of applying preload to prevent light load slipping is achieved. According to the non-circular outer ring rolling bearing, the bearing inner ring, the rolling body, the retainer and the outer ring raceway of the bearing outer ring are processed by adopting a normal processing method, so that the processing is simple; and the outer circle of the outer ring of the bearing outer ring can meet the design requirement by adopting conventional numerical grinding processing, and precision calculation before processing is not needed, so that the processing cost can be greatly shortened, the processing period can be shortened, and the processing quality and the product reliability can be improved.

Description

Non-circular outer ring rolling bearing
Technical Field
The invention relates to the field of rolling bearings, in particular to a non-circular outer ring rolling bearing.
Background
Advanced turboshaft and turboprop engine rotors have the characteristics of high rotating speed and small load, and engine bearings are easy to cause slipping and rubbing damage, so that early failure occurs, and if no measures are taken, the normal work of the engine is greatly influenced, and therefore, how to avoid light-load slipping is an important problem in designing and using high-speed light-load bearings.
In the prior art, common methods for preventing light load slipping include: (1) reducing the diameter of a bearing pitch circle; (2) properly reducing the bearing clearance; (3) increasing the bearing preload.
The existing common methods for preventing light-load slipping all have certain defects: (1) reducing the pitch circle diameter of the bearing: the size of the bearing of the aero-engine is often limited by the structure of the whole machine, so that the aim of preventing light load slipping cannot be achieved by reducing the pitch circle diameter of the bearing; (2) properly reducing the bearing play: although the bearing clearance can be reduced to prevent slipping under light load to a certain extent, the aeroengine bearing has a severe working environment and is required to work under high-temperature and load conditions, and the bearing clearance is too small, so that shaft seizing and clamping stagnation are easy to occur.
(3) Increasing the bearing preload: increasing the bearing preload is a commonly used measure for preventing the bearing from slipping under light load at present, wherein the most effective method is to make the cross section shape of the raceway of the outer ring of the bearing into a non-perfect circle, the load distribution of the bearing changes in the process of one circle of rotation, the bearing area of the rolling body is increased, and the normal pure rolling work of the rolling body is ensured. The bearing is mainly characterized in that an outer ring raceway is non-perfect circular, the concave-convex variation of the raceway is realized, the radial displacement generally varies within a range of dozens of micrometers, the non-circular raceway has higher requirements on the form and position tolerance, the surface quality and the like of the bearing, and the conventional processing method is difficult to finish. The current common processing method adopts pre-deformation processing: the pre-deformation processing is arranged in the last process of the processing of the non-circular raceway of the bearing ring, proper radial external load is applied to the outer surface of a ring blank, so that the ring blank is pre-deformed, the shape of the raceway of the deformed ring blank is similar to that of a theoretical raceway, the external load and the deformation are kept unchanged, the raceway is ground by a special grinding machine for a common bearing until the size of the theoretical base circle is reached, the external load is released finally, the ring is deformed and rebounded, the ring raceway is deviated from the theoretical base circle, and the convex part and the concave part of the ring raceway are changed into the concave part and the convex part when the ring raceway is compared with the pre-deformation, and the shape. In the processing method, the external load is applied through the precision grinding tool, the inner contour of the die is in contact with the outer surface of the bearing ring, the bearing ring is forced to deform through the die and then is processed, precision calculation is needed before processing, the processing quality of the die directly influences the processing quality of the bearing, the processing cost is high, the period is long, and the reliability is low.
Disclosure of Invention
The invention provides a non-circular outer ring rolling bearing, which aims to solve the technical problems that the existing rolling bearing needs to be subjected to precise calculation before processing, the processing quality is low, the processing cost is high, the processing period is long, and the product reliability is low.
The technical scheme adopted by the invention is as follows:
a rolling bearing with a non-circular outer ring comprises a bearing inner ring, a bearing outer ring, rolling bodies and a retainer, wherein the bearing inner ring and the bearing outer ring are sleeved inside and outside, the rolling bodies are sequentially and evenly distributed between the bearing inner ring and the bearing outer ring at intervals, the retainer is used for installing the rolling bodies, the bearing outer ring is annular, a raceway of the outer ring is a circular curved surface with a circular radial section, and an excircle of the outer ring is a non-circular curved surface with a non-circular radial section; the bearing outer ring is used for being in interference fit with the bearing seat hole, so that the outer circle of the outer ring is extruded and deformed, the outer ring raceway is deformed, and the purpose of applying preload to prevent light load slipping is achieved.
Furthermore, the radial section circle of the outer ring is one or a combination of a plurality of sine curve circles, cosine curve circles and elliptic curve circles.
Further, the curve equation of the sine curve circle is:
Figure BDA0003046199840000021
wherein, a1Showing the radial protrusion of the outer ring excircle waveform relative to the outer ring excircle datum; b1Indicating the number of waveforms.
Further, a1Taking the value of 0-1; b1The value is 2-10.
Further, the curve equation of the cosine curve circle is:
Figure BDA0003046199840000022
wherein, a2Showing the radial protrusion of the outer ring excircle waveform relative to the outer ring excircle datum; b2Representing the number of waves.
Further, a2Taking the value of 0-1; b2The value is 2-10.
Further, the curve equation of the elliptic curve circle is:
Figure BDA0003046199840000023
wherein, a3Represents the length of the major axis of the elliptic curve circle; b3Indicating the length of the minor axis of the elliptic curve circle.
Further, the air conditioner is provided with a fan,
Figure BDA0003046199840000024
the value is 0-2.
Further, the curve equation of the elliptic curve circle is:
Figure BDA0003046199840000025
wherein, b4Represents the length of the major axis of the elliptic curve circle; a is4Indicating the length of the minor axis of the elliptic curve circle.
Further, the air conditioner is provided with a fan,
Figure BDA0003046199840000026
the value is 0-2.
The invention has the following beneficial effects:
the non-circular outer ring rolling bearing has the advantages of simple structure and convenience in processing, and can effectively prevent light-load slipping; according to the non-circular outer ring rolling bearing, the bearing inner ring, the rolling body, the retainer, the outer ring raceway of the bearing outer ring and the like can be processed by adopting a normal processing method, and the processing is simple; and the outer circle of the outer ring of the bearing outer ring can meet the design requirement by adopting conventional numerical grinding processing, and precision calculation before processing is not needed, so that the processing cost can be greatly shortened, the processing period can be shortened, and the processing quality and the product reliability can be improved.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a front view schematically showing a non-circular outer ring rolling bearing according to a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of FIG. 1 in which the outer circle is a sine curve circle or a cosine curve circle;
fig. 3 is a schematic diagram of the outer circle in fig. 1 being an elliptic curve circle.
Description of the figures
10. A bearing inner race; 20. a bearing outer race; 201. an outer ring raceway; 202. an outer circle of the outer ring; 30. a rolling body; 40. a cage.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the accompanying drawings, but the invention can be embodied in many different forms, which are defined and covered by the following description.
Referring to fig. 1, a preferred embodiment of the present invention provides a non-circular outer ring rolling bearing, which includes a bearing inner ring 10 and a bearing outer ring 20 that are sleeved inside and outside, rolling elements 30 that are sequentially and evenly distributed between the bearing inner ring 10 and the bearing outer ring 20 at intervals, and a retainer 40 for mounting the rolling elements 30, wherein the bearing outer ring 20 is annular, an outer ring raceway 201 thereof is a circular curved surface whose radial cross section is circular, and an outer ring outer circle 202 thereof is a non-circular curved surface whose radial cross section is non-circular; the bearing outer ring 20 is used for being in interference fit with a bearing seat hole, so that the outer ring outer circle 202 is extruded and deformed, and further the outer ring roller path 201 is deformed, and the purpose of applying preload to prevent light-load slipping is achieved.
When the noncircular outer ring rolling bearing disclosed by the invention acts, because the outer ring raceway 201 of the bearing outer ring 20 is a circular curved surface with a circular radial section, the outer ring excircle 202 of the bearing outer ring 20 is a noncircular curved surface with a noncircular radial section, and the bearing outer ring 20 is in interference fit with the bearing seat hole after being installed, the bearing seat hole extrudes the outer ring excircle 202 to deform through interference fit, and further the outer ring raceway 201 deforms under the action of the rolling body 30, so that the preload is applied to the rolling body 30, and the purpose of preventing light load skidding is achieved.
The non-circular outer ring rolling bearing has the advantages of simple structure and convenience in processing, and can effectively prevent light-load slipping; the non-circular outer ring rolling bearing has the advantages that the bearing inner ring 10, the rolling body 30, the retainer 40, the outer ring raceway 201 of the bearing outer ring 20 and the like can be processed by adopting a normal processing method, and the processing is simple; the outer ring outer circle 202 of the bearing outer ring 20 can meet the design requirement by adopting conventional numerical grinding processing, and precision calculation before processing is not needed, so that the processing cost can be greatly shortened, the processing period can be shortened, and the processing quality and the product reliability can be improved.
Optionally, as shown in fig. 1-3, a radial cross-sectional circle of the outer circle 202 is one or a combination of a sine curve circle, a cosine curve circle, and an elliptic curve circle. When the radial cross-sectional circle of the outer circle 202 is a combination of several of a sine curve circle, a cosine curve circle, and an elliptic curve circle, that is, the radial cross-sectional circle of the outer circle 202 is formed by connecting any several sections of curves of a sine curve, a cosine curve, and an elliptic curve along the circumferential direction. Because the processing modes of the sine curve, the cosine curve and the elliptic curve are mature, when the radial section circle of the outer ring outer circle 202 is one or the combination of a plurality of sine curve circles, cosine curve circles and elliptic curve circles, the outer ring outer circle 202 is simple to process, the processing cost can be effectively shortened, the processing period can be reduced, and the light load slipping can be effectively prevented.
A first embodiment of this alternative, shown in FIG. 2, is sinusoidalThe curve equation for the circle is:
Figure BDA0003046199840000041
wherein, a1Showing the radial protrusion of the waveform of the outer circle 202 relative to the reference of the outer circle 202; b1Indicating the number of waveforms. When designing, a1Need to be designed according to the specific working conditions of the bearing, and b1The waveform number is more, the processing difficulty is higher, and in a reasonable range, the more the waveform number is, the more uniform the load application is, and the better the light-load slippage prevention effect is.
In a first specific embodiment of this alternative, as shown in fig. 2, after long-term exploration, a large number of experiments and continuous optimization design, the inventor obtains a curve equation of a sine curve circle as follows:
Figure BDA0003046199840000042
in (a)1And b1Is taken to be a1Taking the value of 0-1; b1The value is 2-10. When a is1Value 0 to 1, and b1When the value is 2-10, the outer circle 202 of the outer ring is simple to process, the preload application effect is very good, and the light-load slipping of the bearing during working can be effectively prevented.
The first embodiment: supposing that the initial clearance of a certain bearing is designed to be 25um, the clearance of the bearing caused by the interference of the bearing inner ring 10 and the shaft is reduced by 10um, the bearing clearance variable quantity caused by the temperature, the rotating speed and the load is 10um, and the interference between the bearing outer ring 20 and the bearing seat hole reduces the bearing clearance by 20 um. The radial play of the bearing is-15 um, and since the outer ring 20 is a thin-walled component, the negative radial play causes the rolling elements 30 to press the outer ring raceway 201, thereby deforming the outer ring 20.
In a second embodiment of this alternative, not shown, the curve equation of the cosine curve circle is:
Figure BDA0003046199840000043
wherein, a2Indicating that the waveform of the outer circle 202 is along the radial direction relative to the reference of the outer circle 202The amount of protrusion of (d); b2Representing the number of waves. When designing, a2Need to be designed according to the specific working conditions of the bearing, and b2The waveform number is more, the processing difficulty is higher, and in a reasonable range, the more the waveform number is, the more uniform the load application is, and the better the light-load slippage prevention effect is.
In a second specific embodiment of this alternative, not shown, after long-term exploration, a large number of experiments and continuous optimization design, the inventor obtains a curve equation of a cosine curve circle as follows:
Figure BDA0003046199840000044
in (a)2And b2Is taken to be a2Taking the value of 0-1; b2The value is 2-10. When a is2Value 0 to 1, and b2When the value is 2-10, the outer circle 202 of the outer ring is simple to process, the preload application effect is very good, and the light-load slipping of the bearing during working can be effectively prevented.
In a third embodiment of this alternative, as shown in fig. 3, the curve equation of the elliptic curve circle is:
Figure BDA0003046199840000051
wherein, a3Represents the length of the major axis of the elliptic curve circle; b3Indicating the length of the minor axis of the elliptic curve circle. When designing, a3And b3The design is required according to the specific working condition of the bearing.
In a third specific embodiment of this alternative, as shown in fig. 3, after long-term exploration, a large number of experiments and continuous optimization design, the inventor obtains a curve equation of an elliptic curve circle as follows:
Figure BDA0003046199840000052
in (1),
Figure BDA0003046199840000053
is taken from the value of (i)
Figure BDA0003046199840000054
The value is 0-2. When in use
Figure BDA0003046199840000055
When the value is 0-2, the outer circle 202 of the outer ring is simple to process, the preload application effect is very good, and the light-load slipping of the bearing during working can be effectively prevented.
The second embodiment: assuming that the inner diameter of the bearing outer ring 20 is 80cm, the major axis a of the outer diameter ellipse of the bearing outer ring 203＝44cm，b3The interference between the bearing outer ring 20 and the bearing housing hole is 0.02cm when the distance is 42cm, and the deformation of the bearing outer ring 20 caused by the interference is calculated as shown in fig. 3: supposing that the bearing clearance is designed to be 35um, the bearing clearance is reduced by 10um due to the interference of the bearing inner ring 10 and the shaft, the bearing clearance variation is 10um due to the temperature, the rotating speed and the load, the interference magnitude of the bearing outer ring 20 and the bearing seat hole can reduce the high point at the long shaft, even if the bearing clearance is reduced by 18um, a negative clearance of-3 um is formed at the position to form pre-tightening, and the purpose of preventing light load from slipping is achieved.
In a fourth embodiment of this alternative, not shown, the curve equation for the elliptic curve circle is:
Figure BDA0003046199840000056
wherein, b4Represents the length of the major axis of the elliptic curve circle; a is4Indicating the length of the minor axis of the elliptic curve circle. When designing, b4And a4The design is required according to the specific working condition of the bearing.
In a fourth specific embodiment of this alternative, not shown, after long-term exploration, a large number of experiments and continuous optimization design, the inventor obtains a curve equation of an elliptic curve circle as follows:
Figure BDA0003046199840000057
in (1),
Figure BDA0003046199840000058
is taken from the value of (i)
Figure BDA0003046199840000059
The value is 0-2. When in use
Figure BDA00030461998400000510
When the value is 0-2, the outer circle 202 of the outer ring is simple to process, the preload application effect is very good, and the light-load slipping of the bearing during working can be effectively prevented.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A non-circular outer ring rolling bearing comprises a bearing inner ring (10) and a bearing outer ring (20) which are sleeved inside and outside, rolling bodies (30) which are sequentially and evenly distributed between the bearing inner ring (10) and the bearing outer ring (20) at intervals, and a retainer (40) used for installing the rolling bodies (30),
the bearing outer ring (20) is annular, an outer ring raceway (201) of the bearing outer ring is a circular curved surface with a circular radial section, and an outer ring excircle (202) of the bearing outer ring is a non-circular curved surface with a non-circular radial section;
the bearing outer ring (20) is in interference fit with the bearing seat hole, so that the outer ring outer circle (202) is extruded and deformed, and the outer ring roller path (201) is deformed, so that the purpose of applying preload to prevent light-load slipping is achieved.
2. The non-round outer ring rolling bearing according to claim 1,
the radial section circle of the outer ring outer circle (202) is one or a combination of a sine curve circle, a cosine curve circle and an elliptic curve circle.
3. The non-circular outer ring rolling bearing according to claim 2,
the curve equation of the sine curve circle is as follows:
Figure FDA0003046199830000011
wherein,
a1the radial protrusion amount of the waveform of the outer ring excircle (202) relative to the reference of the outer ring excircle (202) is represented;
b1indicating the number of waveforms.
4. The non-round outer ring rolling bearing according to claim 3,
a1taking the value of 0-1;
b1the value is 2-10.
5. The non-circular outer ring rolling bearing according to claim 2,
the curve equation of the cosine curve circle is as follows:
Figure FDA0003046199830000012
wherein,
a2the radial protrusion amount of the waveform of the outer ring excircle (202) relative to the reference of the outer ring excircle (202) is represented;
b2representing the number of waves.
6. The non-round outer ring rolling bearing according to claim 5,
a2taking the value of 0-1;
b2the value is 2-10.
7. The non-circular outer ring rolling bearing according to claim 2,
the curve equation of the elliptic curve circle is as follows:
Figure FDA0003046199830000021
wherein,
a3represents the length of the major axis of the elliptic curve circle;
b3indicating the length of the minor axis of the elliptic curve circle.
8. The non-round outer ring rolling bearing according to claim 7,
Figure FDA0003046199830000022
the value is 0-2.
9. The non-circular outer ring rolling bearing according to claim 2,
the curve equation of the elliptic curve circle is as follows:
Figure FDA0003046199830000023
wherein,
b4represents the length of the major axis of the elliptic curve circle;
a4indicating the length of the minor axis of the elliptic curve circle.
10. The non-round outer ring rolling bearing according to claim 9,
Figure FDA0003046199830000024
the value is 0-2.
CN202110472919.0A 2021-04-29 2021-04-29 Non-circular outer ring rolling bearing Active CN113027912B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1083186A (en) * 1993-04-20 1994-03-02 叶有兴 Multifunctional anti skid bearing
JP2006226462A (en) * 2005-02-18 2006-08-31 Toyota Motor Corp Bearing structure
CN201121661Y (en) * 2007-12-05 2008-09-24 镇江飞亚轴承有限责任公司 Pressing sleeve bearing with elastic housing washer
CN106402162A (en) * 2016-10-25 2017-02-15 浙江大学 Noncircular raceway rolling bearing
CN109986305A (en) * 2019-03-21 2019-07-09 中国航发哈尔滨轴承有限公司 A kind of prestress forming method for grinding of non-circular " three-section wave shape " raceway of thin-walled

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1083186A (en) * 1993-04-20 1994-03-02 叶有兴 Multifunctional anti skid bearing
JP2006226462A (en) * 2005-02-18 2006-08-31 Toyota Motor Corp Bearing structure
CN201121661Y (en) * 2007-12-05 2008-09-24 镇江飞亚轴承有限责任公司 Pressing sleeve bearing with elastic housing washer
CN106402162A (en) * 2016-10-25 2017-02-15 浙江大学 Noncircular raceway rolling bearing
CN109986305A (en) * 2019-03-21 2019-07-09 中国航发哈尔滨轴承有限公司 A kind of prestress forming method for grinding of non-circular " three-section wave shape " raceway of thin-walled

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