CN106015347A - Bearing for elliptical outer ring raceway - Google Patents
Bearing for elliptical outer ring raceway Download PDFInfo
- Publication number
- CN106015347A CN106015347A CN201610670717.6A CN201610670717A CN106015347A CN 106015347 A CN106015347 A CN 106015347A CN 201610670717 A CN201610670717 A CN 201610670717A CN 106015347 A CN106015347 A CN 106015347A
- Authority
- CN
- China
- Prior art keywords
- bearing
- outer ring
- ring raceway
- eccentricity
- raceway
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—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
- F16C33/62—Selection of substances
Abstract
The invention relates to a bearing, an outer ring raceway of the bearing is in an elliptical shape. The eccentricity of the elliptical outer ring raceway of the bearing is determined according to pre-tightening amount and static load for bearing assembling, the ratio of pre-tightening amount and static load is larger, the elliptical eccentricity is larger. The eccentricity of the elliptical outer ring raceway of the bearing is 1*10<-5>-1*10<-6>. When the bearing is arranged, a short shaft is in a vertical direction, and a long shaft is in a horizontal direction. The bearing is a deep groove ball bearing. The design of the outer ring raceway is in the elliptical shape, acting force on a roller at an original lowest position is reduced, and is born by several adjacent rollers, the acting force is dispersed, and the maximum stress value on the integral outer ring raceway can be reduced, and possibility that the bearing outer ring is damaged is reduced.
Description
Technical field
The present invention relates to a kind of bearing, the bearing of a kind of oval outer ring raceway.
Background technology
Motor bearings fault is one of common source of failure of track traffic.Related data shows, traction electric machine bearing external roller path table
Face material occurs that stripping has accounted for about 1/3rd of bearing fault quantity.Analyze its producing cause, be mainly and ball contact
Part stress is excessively concentrated, and fatigue rupture occurs under pulsating cyclic varying stress effect.Outside solution mainly improves at present
The fatigue strength of loop material, reduces the load etc. during bearing working.
Owing to, in terms of vehicle chassis space layout, the rotor axis direction of traction electric machine is typically maintained level.Due to
Rotor self is by gravity so that the bearing of motor stress in all directions is uneven.At present outside motor bearings
Circle raceway is all the circle of standard, and on vertical direction, lowest point stress is maximum, and peak position stress is minimum.Raceway is minimum
Point is most susceptible to destroy, and as shown in Figure 4, raceway face occurs little area to peel off.The maximum that other positions of raceway are subject to should
Force value is the most significantly less than the stress value at minimum point.Stress distribution cloud atlas on outer ring raceway is as shown in Figure 1.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, propose the bearing of a kind of oval outer ring raceway, by changing the shape of outer ring raceway
Shape, reduces the bearing outer ring ball track factor of stress concentration, and the stress alleviating bearing outer ring ball track concentrates situation, improves bearing and uses the longevity
Life.
To achieve these goals, present invention employs techniques below scheme:
A kind of bearing, the outer ring raceway of described bearing is oval.
Pretension amount and dead load that the eccentricity of the oval outer ring raceway of described bearing is assembled according to bearing determine, dead load is with pre-
The ratio of tight amount is the biggest, then oval eccentricity is the biggest.
The eccentricity of the oval outer ring raceway of described bearing is 1 × 10-5～1 × 10-6。
When described bearing is installed, short axle is in vertical direction, and major axis is horizontally oriented.
Described bearing is deep groove ball bearing.
Compared with prior art, the beneficial effect that the present invention possesses:
The outer ring raceway of bearing of the present invention is designed as ellipse, it is possible to reduce the active force that the roller of lowest part originally is subject to, by phase
Adjacent multiple rollers undertake, and make active force become dispersion, reduce the maximum stress value that outer ring raceway entirety is subject to, reduce outside bearing
The possibility that circle is destroyed.
Accompanying drawing explanation
Fig. 1 is the Stress Map of motor bearings outer ring of the present invention.
Fig. 2 is the bearing outer ring circumferentially stress envelope of circular raceway in example of the present invention.
Fig. 3 is the bearing outer ring circumferentially stress envelope of oval raceway in example of the present invention.
Fig. 4 is motor bearings outer ring raceway generation sur-face peeling picture of the present invention.
Detailed description of the invention
Below by example, technical scheme is further elaborated.
Embodiment 1
A kind of bearing, the outer ring raceway of described bearing is oval.
Pretension amount and dead load that the eccentricity of the oval outer ring raceway of described bearing is assembled according to bearing determine, dead load is with pre-
The ratio of tight amount is the biggest, then oval eccentricity is the biggest.
The eccentricity of the oval outer ring raceway of described bearing is 1 × 10-5～1 × 10-6。
When described bearing is installed, short axle is in vertical direction, and major axis is horizontally oriented.
Embodiment 2
Assuming the traction electric machine of a 500KW, be installed in the horizontal direction bottom locomotive, rotor weight is about 1500kg.Motor
Non-transmision end uses 6219M deep groove ball bearing.Owing to electric machine main shaft there to be the requirement of rigidity, it is assumed that the radial tightening amount of bearing is
64μm.Then bearing is in addition to the vibration in motor operation course to be undertaken, and also to carry the rotor gravity of about 75000N, and
Pretightning force.
When the circular raceway that actionradius is 76mm, raceway centrally along the stress distribution of circumference as in figure 2 it is shown, maximum stress value
Having reached 155MPa, other stress values everywhere are the most significantly less than maximum stress value.
According to the present invention, use semi-major axis is 76.003mm, when semi-minor axis is the oval raceway of 75.997mm, and raceway center
Stress distribution circumferentially is as shown in Figure 3.As seen from Figure 3, owing to the strain of raceway lowest part material diminishes, stress value
Being decreased obviously, drop to 147MPa, the range of decrease is about 5%.Stress value at adjacent each roller is close with maximum stress value.Accordingly
Think in the case of ensureing other performances of bearing, reduce the maximum stress that bearing outer ring is subject to, improve the use longevity of bearing
Life.
Implement the present invention and can use nanofabrication technique.Nanotechnology be often referred to nanoscale (0.1nm～100nm) material,
Design, manufacture, control and the technology of product.The most in decades, nanofabrication technique has obtained fast development, and it is integrated with
The advanced technology achievements such as modern mechanical, optics, electronics, computer, measurement and material so that the precision of processing is from 20th century
The micron order at the beginning of the sixties brings up to current 10nm level, makes the machining accuracy of product improve 1～2 within short decades
The order of magnitude, improves the Performance And Reliability of product greatly.Use it for bearing mnanufacture, it is possible to be greatly promoted the size of bearing
Precision, makes scale error reach below micron.
Claims (5)
1. a bearing, it is characterised in that the outer ring raceway of described bearing is oval.
2. bearing as claimed in claim 1, it is characterised in that the eccentricity of the oval outer ring raceway of described bearing is according to axle
Taking up the pretension amount joined and dead load determines, the ratio of dead load and pretension amount is the biggest, then oval eccentricity is the biggest.
3. bearing as claimed in claim 1, it is characterised in that the eccentricity of the oval outer ring raceway of described bearing is 1 ×
10-5～1 × 10-6。
4. bearing as claimed in claim 1, it is characterised in that when described bearing is installed, short axle is in vertical direction, major axis
It is horizontally oriented.
5. the bearing as described in Claims 1 to 4, it is characterised in that described bearing is deep groove ball bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610670717.6A CN106015347A (en) | 2016-08-12 | 2016-08-12 | Bearing for elliptical outer ring raceway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610670717.6A CN106015347A (en) | 2016-08-12 | 2016-08-12 | Bearing for elliptical outer ring raceway |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106015347A true CN106015347A (en) | 2016-10-12 |
Family
ID=57134000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610670717.6A Pending CN106015347A (en) | 2016-08-12 | 2016-08-12 | Bearing for elliptical outer ring raceway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106015347A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4565457A (en) * | 1976-10-07 | 1986-01-21 | Georg Muller Kugellager-Fabrik K.G. | Radial, radial angular-contact, and axial angular-contact ball bearing |
| JP2002039190A (en) * | 2000-07-28 | 2002-02-06 | Koyo Seiko Co Ltd | Four-point contact ball bearing |
| CN2916243Y (en) * | 2006-03-30 | 2007-06-27 | 马鞍山统力回转支承有限公司 | Single-row ball type slewing bearing of elliptic roller track |
| JP2009121659A (en) * | 2007-11-19 | 2009-06-04 | Ntn Corp | Rolling member |
| CN201953830U (en) * | 2010-12-30 | 2011-08-31 | 襄阳汽车轴承股份有限公司 | Oval channel contact type clutch separation bearing |
| DE102011079959A1 (en) * | 2011-07-28 | 2013-01-31 | Schaeffler Technologies AG & Co. KG | Bearing part e.g. cylindrical rolling element, for rolling bearing, has recesses comprising elliptic outline contour, where prolonged shaft section of outline contour is aligned transverse to rolling direction |
| CN105822661A (en) * | 2016-06-01 | 2016-08-03 | 河南科技大学 | Design method and device of structural parameters of major and minor semi axes of elliptical race ball bearing |
-
2016
- 2016-08-12 CN CN201610670717.6A patent/CN106015347A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4565457A (en) * | 1976-10-07 | 1986-01-21 | Georg Muller Kugellager-Fabrik K.G. | Radial, radial angular-contact, and axial angular-contact ball bearing |
| JP2002039190A (en) * | 2000-07-28 | 2002-02-06 | Koyo Seiko Co Ltd | Four-point contact ball bearing |
| CN2916243Y (en) * | 2006-03-30 | 2007-06-27 | 马鞍山统力回转支承有限公司 | Single-row ball type slewing bearing of elliptic roller track |
| JP2009121659A (en) * | 2007-11-19 | 2009-06-04 | Ntn Corp | Rolling member |
| CN201953830U (en) * | 2010-12-30 | 2011-08-31 | 襄阳汽车轴承股份有限公司 | Oval channel contact type clutch separation bearing |
| DE102011079959A1 (en) * | 2011-07-28 | 2013-01-31 | Schaeffler Technologies AG & Co. KG | Bearing part e.g. cylindrical rolling element, for rolling bearing, has recesses comprising elliptic outline contour, where prolonged shaft section of outline contour is aligned transverse to rolling direction |
| CN105822661A (en) * | 2016-06-01 | 2016-08-03 | 河南科技大学 | Design method and device of structural parameters of major and minor semi axes of elliptical race ball bearing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161012 |
|
| RJ01 | Rejection of invention patent application after publication |