CN106438728B - Assembly method without filling slot outer ring self-lubricating aluminium alloy oscillating bearing - Google Patents
Assembly method without filling slot outer ring self-lubricating aluminium alloy oscillating bearing Download PDFInfo
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- CN106438728B CN106438728B CN201611028433.3A CN201611028433A CN106438728B CN 106438728 B CN106438728 B CN 106438728B CN 201611028433 A CN201611028433 A CN 201611028433A CN 106438728 B CN106438728 B CN 106438728B
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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
- F16C43/00—Assembling bearings
- F16C43/02—Assembling sliding-contact bearings
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Abstract
Assembly method without filling slot outer ring self-lubricating aluminium alloy oscillating bearing, the invention belongs to bearings to assemble field, it will solve the problems, such as that existing assembling form is difficult to realize monoblock type, is assembled without filling slot self-lubricating aluminium alloy oscillating bearing.Assembly method：One, dynamometer, detector for displacement measuring and amesdial are checked；Two, inner ring application is preloaded, generates elastic deformation amount δ i；Three, the flexible deformation of fixed inner ring；Four, each instrument is checked again；Five, outer ring is applied and is preloaded, generate elastic deformation amount δ o, the sum of the elastic deformation amount of inner ring and the elastic deformation amount of outer ring is made to be more than outer ring channel bottom depth；It six, will be in inner ring embedded outer ring；Seven, preloading in inner ring and outer ring is laid down, inner ring and outer ring elasticity is made to restore.The present invention can realize monoblock type, be assembled without filling slot oscillating bearing flexible deformation, and the lasso flexible rotation after the completion of assembling, dimensional accuracy is met the requirements.
Description
Technical field
The invention belongs to bearing assembly field more particularly to a kind of assembly sides of novel self-lubricating aluminium alloy oscillating bearing
Method.
Background technology
Self-lubricating aluminium alloy oscillating bearing is to bond selflubricating liner in contact surface to reduce the spherical surface sliding axle of friction
It holds, has many characteristics, such as big low speed oscillations, size, light-weight, carrying weight, shock resistance, long lifespan, be widely used in the machine of all kinds of military secrets
Body load supporting system and operating system belong to aircraft equipment Key basic parts.
Current domestic more ripe oscillating bearing assembly method is mainly that outer ring is cracked or outer ring band filling slot, it is domestic often
It advises oscillating bearing and segmental mandrel formula, and monoblock type, arming is axially or radially generally used using the assembly of band notch or bearing outer ring
Segment mouth outer ring self-lubricating aluminium alloy oscillating bearing uses the structure that Internal and external cycle integrally contains, and assembly technology is relatively difficult, can not
Inner ring is fitted into outer ring using conventional process, belongs to technical bottleneck, it is serious restrict China's heavy type opportunity of combat development and
Equip progress.
Therefore, it is necessary to a kind of oscillating bearing assembly methods, to realize monoblock type, without filling slot outer ring self-lubricating aluminium alloy
Oscillating bearing assembly trial-production.
Invention content
The invention aims to solve existing assembling form to be difficult to realize monoblock type, without filling slot self-lubricating aluminium alloy
The problem of oscillating bearing assembles, and a kind of monoblock type, the assembly without filling slot outer ring self-lubricating aluminium alloy oscillating bearing are provided
Method.
Monoblock type of the present invention, the assembly method without filling slot outer ring self-lubricating aluminium alloy oscillating bearing follow these steps reality
It is existing：
One, dynamometer, detector for displacement measuring and the amesdial in oscillating bearing assembly device are checked, passes through amesdial
Level correction is carried out to weighted platform；
Two, among oscillating bearing inner ring being placed on upper preloading deformation tooling and the lower preloading deformation tooling of inner ring, by upper
The spherical outside surface for preloading deformation tooling and lower preloading deformation tooling clamping inner ring, preloads inner ring application by weighted platform, in advance
The direction of load is radial direction straight up, and dynamometer, which is shown, preloads size, ensures that inner ring is in flexible deformation and material is permitted
With in stress, showing to obtain the elastic deformation amount δ i of inner ring by detector for displacement measuring；
Three, the flexible deformation that inner ring is fixed using detachable tooling, then unloads inner ring from preloading deformation tooling；
Four, oscillating bearing is assembled into the preloading deformation tooling of the inner ring in device and is changed to the preloading deformation tooling in outer ring, again
Dynamometer, detector for displacement measuring and amesdial are checked, and level correction is carried out to weighted platform by amesdial；
Five, among oscillating bearing outer ring being placed on upper preloading deformation tooling and the lower preloading deformation tooling of outer ring, by upper
The cylindrical surface for preloading deformation tooling and lower preloading deformation tooling clamping outer ring, applies outer ring by weighted platform and preloads, in advance
The direction of load is radial direction straight down, and dynamometer, which is shown, preloads size, ensures that outer ring is in flexible deformation and material is permitted
With in stress, showing to obtain the elastic deformation amount δ o of outer ring by detector for displacement measuring, make elastic deformation amount and the outer ring of inner ring
The sum of elastic deformation amount is more than outer ring channel bottom depth dR, i.e. δ o+ δ i>DR obtains the outer ring of flexible deformation；
Six, in the outer ring for the inner ring embedded step 5 flexible deformation for unloading step 3；
Seven, preloading in inner ring and outer ring is laid down, inner ring and outer ring elasticity is made to restore, realizes aluminium alloy oscillating bearing
Preload deformation assembly.
The present invention provides a kind of assembly methods of no filling slot outer ring self-lubricating aluminium alloy oscillating bearing, pass through load
Platform, which applies inner ring, outer ring, to be preloaded, and so that inside and outside lasso is generated flexible deformation, when the elastic deformation amount δ i of inner ring and outer ring
The sum of elastic deformation amount δ o be more than outer ring channel bottom depth, i.e. δ o+ δ i>When dR, monoblock type, arming can be realized by this method
Segment mouth self-lubricating aluminium alloy oscillating bearing flexible deformation is assembled, and the lasso presentation quality after the completion of assembling is good, flexible rotation,
Dimensional accuracy is met the requirements.
Description of the drawings
Fig. 1 is to assemble the front view that device preloads inner ring deformation using the oscillating bearing described in specific implementation mode two；
Fig. 2 is to assemble the side view that device preloads inner ring deformation using the oscillating bearing described in specific implementation mode two；
Fig. 3 is the front view of the detachable tooling described in specific implementation mode three；
Fig. 4 is to assemble the front view that device preloads outer ring deformation using the oscillating bearing described in specific implementation mode two；
Fig. 5 is to assemble the side view that device preloads outer ring deformation using the oscillating bearing described in specific implementation mode two；
Fig. 6 is to obtain the load metamorphism test chart of outer ring, wherein ■ generations using ANSYS finite element analysis softwares in embodiment
Gauge pressure enters deformation, ● equivalent stress is represented, flexible deformation section is represented at arrow；
Fig. 7 is to obtain the load metamorphism test chart of inner ring, wherein ■ generations using ANSYS finite element analysis softwares in embodiment
Gauge pressure enters deformation, ● equivalent stress is represented, flexible deformation section is represented at arrow.
Specific implementation mode
Specific implementation mode one：Present embodiment monoblock type, without filling slot outer ring self-lubricating aluminium alloy oscillating bearing
Assembly method follows these steps to realize：
One, dynamometer, detector for displacement measuring and the amesdial in oscillating bearing assembly device are checked, passes through amesdial
Level correction is carried out to weighted platform；
Two, among oscillating bearing inner ring being placed on upper preloading deformation tooling and the lower preloading deformation tooling of inner ring, by upper
The spherical outside surface for preloading deformation tooling and lower preloading deformation tooling clamping inner ring, preloads inner ring application by weighted platform, in advance
The direction of load is radial direction straight up, and dynamometer, which is shown, preloads size, ensures that inner ring is in flexible deformation and material is permitted
With in stress, showing to obtain the elastic deformation amount δ i of inner ring by detector for displacement measuring；
Three, the flexible deformation that inner ring is fixed using detachable tooling, then unloads inner ring from preloading deformation tooling；
Four, oscillating bearing is assembled into the preloading deformation tooling of the inner ring in device and is changed to the preloading deformation tooling in outer ring, again
Dynamometer, detector for displacement measuring and amesdial are checked, and level correction is carried out to weighted platform by amesdial；
Five, among oscillating bearing outer ring being placed on upper preloading deformation tooling and the lower preloading deformation tooling of outer ring, by upper
The cylindrical surface for preloading deformation tooling and lower preloading deformation tooling clamping outer ring, applies outer ring by weighted platform and preloads, in advance
The direction of load is radial direction straight down, and dynamometer, which is shown, preloads size, ensures that outer ring is in flexible deformation and material is permitted
With in stress, showing to obtain the elastic deformation amount δ o of outer ring by detector for displacement measuring, make elastic deformation amount and the outer ring of inner ring
The sum of elastic deformation amount is more than outer ring channel bottom depth dR, i.e. δ o+ δ i>DR obtains the outer ring of flexible deformation；
Six, in the outer ring for the inner ring embedded step 5 flexible deformation for unloading step 3；
Seven, preloading in inner ring and outer ring is laid down, inner ring and outer ring elasticity is made to restore, realizes aluminium alloy oscillating bearing
Preload deformation assembly.
Present embodiment step 2 and step 5 advance with ANSYS finite element softwares establish oscillating bearing geometrical model and
Assembly simulation analysis model, and mesh generation is carried out, the physics such as input landing component elasticity modulus, linear expansion coefficient, Poisson's ratio
Parameter carries out assembly simulation analysis.
Present embodiment control applies magnitude of load, it is ensured that and lasso is in flexible deformation section and material allowable stress, when
The sum of elastic deformation amount of inside and outside circle is more than outer ring channel bottom depth, i.e. δ o+ δ i>When dR, the assembly of lasso elasticity is realized.
Specific implementation mode two：The present embodiment is different from the first embodiment in that the oscillating bearing described in step 1
Assembly device includes 1,4 support column 11 of horizontal platform, fixed top plate 3, weighted platform 2, dynamometer 9,10, thousand points of detector for displacement measuring
Table 20 preloads deformation tooling and main thread bar 4, and 1 support is respectively fixedly installed at 4 angles of 1 upper surface of rectangular horizontal platform
Column 11, fixed top plate 3 are fixed on the top of 4 support columns 11 by the fastening bolt 12 at 11 top of support column, fixed top plate 3
Center is provided with circular hole, and big nut 7 is fixed in circular hole, and main thread bar 4 passes through the big nut 7 on fixed top plate 3, main thread bar 4
Upper end be connected with rotary knob 8, lower end and the weighted platform 2 of main thread bar 4 are rotatablely connected, the lower surface of weighted platform 2
It is fixed with preloading deformation tooling 5, the upper surface of horizontal platform 1 is fixed with lower preloading deformation tooling 6, passes through upper preloading deformation tooling
The outer ring face of 5 and the lower preloading inner ring A or outer ring B for deforming the clamping oscillating bearing of tooling 6, the peace in upper preloading deformation tooling 5
Equipped with dynamometer 9, detector for displacement measuring 10 is installed in lower preloading deformation tooling 6, the left and right sides two support columns 11 it
Between be respectively connected with 1 strutbeam, 1 amesdial 20 is respectively installed on each strutbeam, the measuring staff of amesdial 20 under fixed top plate 3
Surface is in contact.Other steps and parameter are same as the specific embodiment one.
Present embodiment weighted platform is set on 4 support columns, and level correction is carried out to weighted platform by amesdial.
Specific implementation mode three：Present embodiment is applied unlike specific implementation mode two to oscillating bearing inner ring A
Add in the case of preloading, it further includes 4 L-shaped fixing tools in side 15 and detachable work which, which assembles device,
It fills, threaded hole is provided in the vertical panel of each fixing tool 15 and the plate face of level board, wherein 2 fixing tools 15 are by tight
Determine the lower surface that screw is fixed on weighted platform 2,2 fixing tools 15 are fixed on the upper surface of horizontal platform 1 by holding screw；
Detachable tooling is made of upper-part 16, minor thread bar 18 and lower component 17, in upper-part 16 and lower component 17
Surface is also provided with threaded hole, and the both ends of minor thread bar 18 are respectively threadedly coupled there are one nut 19, and detachable tooling is located at inner ring A
Inside, the arc surface of upper-part 16 and lower component 17 closes with the inner ring face paste of inner ring A, pressed from both sides between upper-part 16 and lower component 17
There are both ends to carry the minor thread bar 18 of nut 19, upper-part 16 is clamped in 2 positioned at 2 lower surface of weighted platform by holding screw
Between a fixing tool 15, lower component 17 by holding screw be clamped in positioned at 1 upper surface of horizontal platform 2 fixing tools 15 it
Between.Other steps and parameter are identical with embodiment two.
Present embodiment is fixed inner ring flexible deformation by rotating the nut in detachable tooling.
Show using the structure that the oscillating bearing assembly device described in specific implementation mode two and three is internal, outer ring preloads deformation
It is intended to as shown in Fig. 1~5.
Specific implementation mode four：Step 2 uses unlike one of present embodiment and specific implementation mode one to three
ANSYS finite element softwares carry out simulation analysis to the extruding flexible deformation of oscillating bearing inner ring.Other steps and parameter with it is specific
One of embodiment one to three is identical.
Specific implementation mode five：Step 5 uses unlike one of present embodiment and specific implementation mode one to four
ANSYS finite element softwares carry out simulation analysis to the extruding flexible deformation of oscillating bearing outer ring.Other steps and parameter with it is specific
One of embodiment one to four is identical.
Specific implementation mode four and specific implementation mode five are utilized respectively ANSYS finite element methods and establish oscillating bearing geometry
Model and assembly simulation analysis model, under the conditions of analyzing load mode and different radial loads, the flexible deformation of inner and outer ring becomes
Gesture and stress distribution therefrom determine the best deflection of Internal and external cycle, and meet stress requirement, realize lasso flexible deformation emulation dress
Match.According to simulation analysis as a result, the flexible deformation assembling test of aluminium alloy exemplar is carried out, in conjunction with the correction of test result simulation model
In relevant parameter, the final flexible deformation assembly for realizing aluminium alloy lasso.
Specific implementation mode six：Step 5 unlike one of present embodiment and specific implementation mode one to five makes inner ring
Elastic deformation amount and the sum of the elastic deformation amount of outer ring be more than outer ring channel bottom 0.05~1mm of depth.Other steps and parameter with
One of specific implementation mode one to five is identical.
Embodiment：The present embodiment carries out monoblock type, nothing so that size is the aluminium alloy oscillating bearing of 105 × Ф of Ф 127 as an example
The assembly method of filling slot outer ring self-lubricating aluminium alloy oscillating bearing follows these steps to implement：
One, dynamometer, detector for displacement measuring and the amesdial in oscillating bearing assembly device are checked, passes through amesdial
Level correction is carried out to weighted platform；
Two, oscillating bearing inner ring is placed on inner ring to preload in deformation tooling, inner ring application is preloaded by weighted platform,
The direction preloaded is radial direction straight up, and dynamometer show that it is 3KN to preload size, guarantee inner ring be in flexible deformation and
In material allowable stress, show to obtain the elastic deformation amount δ i=1.25mm of inner ring, material equivalent stress by detector for displacement measuring
In 383MPa or less；
Three, the flexible deformation of inner ring is fixed using dismountable tooling, is then preloaded from inner ring in being unloaded in deformation tooling
Circle；
Four, oscillating bearing is assembled into the preloading deformation tooling of the inner ring in device and is changed to the preloading deformation tooling in outer ring, again
Dynamometer, detector for displacement measuring and amesdial are checked, and level correction is carried out to weighted platform by amesdial；
Five, oscillating bearing outer ring is placed on outer ring to preload in deformation tooling, outer ring is applied by weighted platform and is preloaded,
The direction preloaded is radial direction straight down, and dynamometer shows that it is 5.8KN to preload size, ensures that outer ring is in flexible deformation
And in material allowable stress, shows to obtain the elastic deformation amount δ o=1.3mm of outer ring by detector for displacement measuring, make the elasticity of inner ring
It is 2.5mm that the sum of elastic deformation amount of deflection and outer ring, which is more than outer ring channel bottom depth dR, obtains the outer ring of flexible deformation, material
Equivalent stress is in 400MPa or less；
Six, in the outer ring for the inner ring embedded step 5 flexible deformation for unloading step 3；
Seven, preloading in inner ring and outer ring is laid down, inner ring and outer ring elasticity is made to restore, realizes aluminium alloy oscillating bearing
Preload deformation assembly.
The present embodiment step 2 and step 5 establish oscillating bearing geometrical model and dress using ANSYS finite element methods in advance
With simulation analysis model, under the conditions of analyzing load mode and radial load, the flexible deformation trend and stress point of inside and outside lasso
Cloth, test chart are as shown in Figures 6 and 7.
The present embodiment monoblock type, without filling slot outer ring self-lubricating aluminium alloy oscillating bearing assembly method, be based on emulation
Analysis result carries out the flexible deformation assembling test of aluminium alloy exemplar, in conjunction with the correlation ginseng in the correction of test result simulation model
Number, the final flexible deformation assembly for realizing aluminium alloy lasso.
The present embodiment realizes the monoblock type that size is Ф 105, without filling slot outer ring self-lubricating aluminium alloy oscillating bearing
Assembly trial-production.Lasso presentation quality after the completion of assembly is good, and flexible rotation, dimensional accuracy is met the requirements.
Claims (6)
1. the assembly method without filling slot outer ring self-lubricating aluminium alloy oscillating bearing, it is characterised in that be to follow these steps reality
It is existing：
One, dynamometer, detector for displacement measuring and the amesdial in oscillating bearing assembly device are checked, is added by amesdial pair
Carrying platform carries out level correction；
Two, it among oscillating bearing inner ring being placed on upper preloading deformation tooling and the lower preloading deformation tooling of inner ring, is preloaded by upper
The spherical outside surface for deforming tooling and lower preloading deformation tooling clamping inner ring, preloads inner ring application by weighted platform, preloads
Direction be radial direction straight up, dynamometer, which show, preloads size, and guarantee inner ring is in flexible deformation and material is allowable answers
In power, show to obtain the elastic deformation amount δ i of inner ring by detector for displacement measuring；
Three, the flexible deformation that inner ring is fixed using detachable tooling, then unloads inner ring from preloading deformation tooling；
Four, oscillating bearing is assembled into the preloading deformation tooling of the inner ring in device and is changed to the preloading deformation tooling in outer ring, checked again
Dynamometer, detector for displacement measuring and amesdial, and level correction is carried out to weighted platform by amesdial；
Five, it among oscillating bearing outer ring being placed on upper preloading deformation tooling and the lower preloading deformation tooling of outer ring, is preloaded by upper
The cylindrical surface for deforming tooling and lower preloading deformation tooling clamping outer ring, applies outer ring by weighted platform and preloads, preload
Direction be radial direction straight down, dynamometer, which show, preloads size, and guarantee outer ring is in flexible deformation and material is allowable answers
In power, shows to obtain the elastic deformation amount δ o of outer ring by detector for displacement measuring, make the elastic deformation amount of inner ring and the elasticity of outer ring
The sum of deflection is more than outer ring channel bottom depth dR, i.e. δ o+ δ i>DR obtains the outer ring of flexible deformation；
Six, in the outer ring for the inner ring embedded step 5 flexible deformation for unloading step 3；
Seven, preloading in inner ring and outer ring is laid down, inner ring and outer ring elasticity is made to restore, realizes preloading for aluminium alloy oscillating bearing
Deformation assembly.
2. the assembly method of no filling slot outer ring self-lubricating aluminium alloy oscillating bearing according to claim 1, feature
It is that the assembly device of the oscillating bearing described in step 1 includes horizontal platform (1), 4 support columns (11), fixed top plate (3), load
Platform (2), detector for displacement measuring (10), amesdial (20), preloads deformation tooling and main thread bar (4) at dynamometer (9), in rectangle
1 support column (11) is respectively fixedly installed at 4 angles of horizontal platform (1) upper surface, fixed top plate (3) is pushed up by support column (11)
The fastening bolt (12) in portion is fixed on the top of 4 support columns (11), and the center of fixation top plate (3) is provided with circular hole, consolidates in circular hole
There are big nut (7), main thread bar (4) to pass through the big nut (7) on fixed top plate (3), the upper end of main thread bar (4) is connected with surely
Rotary knob (8), lower end and the weighted platform (2) of main thread bar (4) are rotatablely connected, and the lower surface of weighted platform (2) is fixed
There are upper preloading deformation tooling (5), the upper surface of horizontal platform (1) to be fixed with lower preloading deformation tooling (6), pass through upper preloading deformation work
It fills (5) and the inner ring (A) of oscillating bearing or the outer ring face of outer ring (B) is clamped in lower preloading deformation tooling (6), in upper preloading deformation
Dynamometer (9) is installed in tooling (5), detector for displacement measuring (10) is installed in lower preloading deformation tooling (6), in the left and right sides
Two support columns (11) between be respectively connected with 1 strutbeam, 1 amesdial (20), amesdial are respectively installed on each strutbeam
(20) measuring staff is in contact with the lower surface of fixed top plate (3).
3. the assembly method of no filling slot outer ring self-lubricating aluminium alloy oscillating bearing according to claim 1, feature
It is to preload in the case that oscillating bearing inner ring (A) application, it is in " L " that oscillating bearing assembly device, which further includes 4 sides,
It is provided with spiral shell in the fixing tool (15) and detachable tooling of shape, the vertical panel of each fixing tool (15) and the plate face of level board
Pit, wherein 2 fixing tools (15) are fixed on the lower surface of weighted platform (2), 2 fixing tools (15) by holding screw
The upper surface of horizontal platform (1) is fixed on by holding screw；
Detachable tooling is made of upper-part (16), minor thread bar (18) and lower component (17), in upper-part (16) and lower component
(17) surface is also provided with threaded hole, and respectively there are one nut (19), detachable works for threaded connection at the both ends of minor thread bar (18)
Dress is closed positioned at the inside of inner ring (A), upper-part (16) and the arc surface of lower component (17) and the inner ring face paste of inner ring (A), top
The minor thread bar (18) that both ends carry nut (19) is accompanied between part (16) and lower component (17), upper-part (16) passes through clamp screw
Nail clip is held between 2 fixing tools (15) positioned at weighted platform (2) lower surface, and lower component (17) is clamped by holding screw
Between 2 fixing tools (15) positioned at horizontal platform (1) upper surface.
4. the assembly method of no filling slot outer ring self-lubricating aluminium alloy oscillating bearing according to claim 1, feature
It is that step 2 carries out simulation analysis using ANSYS finite element softwares to the extruding flexible deformation of oscillating bearing inner ring.
5. the assembly method of no filling slot outer ring self-lubricating aluminium alloy oscillating bearing according to claim 1, feature
It is that step 5 carries out simulation analysis using ANSYS finite element softwares to the extruding flexible deformation of oscillating bearing outer ring.
6. the assembly method of no filling slot outer ring self-lubricating aluminium alloy oscillating bearing according to claim 1, feature
It is that step 5 makes the sum of the elastic deformation amount of inner ring and the elastic deformation amount of outer ring be more than outer ring channel bottom 0.05~1mm of depth.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611028433.3A CN106438728B (en) | 2016-11-18 | 2016-11-18 | Assembly method without filling slot outer ring self-lubricating aluminium alloy oscillating bearing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611028433.3A CN106438728B (en) | 2016-11-18 | 2016-11-18 | Assembly method without filling slot outer ring self-lubricating aluminium alloy oscillating bearing |
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| CN106438728A CN106438728A (en) | 2017-02-22 |
| CN106438728B true CN106438728B (en) | 2018-07-31 |
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| CN108942168B (en) * | 2018-08-27 | 2024-08-27 | 上海交通大学 | Electric spindle assembly fixture with pre-added elastic load |
| CN110926674B (en) * | 2019-12-03 | 2021-05-25 | 中国航发哈尔滨轴承有限公司 | Special clamp for automatic detection of bearing ring channel stress |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| AT14154B (en) * | 1902-08-05 | 1903-11-25 | Carl Reichert | |
| DE3802275A1 (en) * | 1988-01-27 | 1989-08-10 | Mtu Friedrichshafen Gmbh | DIVIDED SLIDE BEARING |
| JP4216509B2 (en) * | 2002-02-20 | 2009-01-28 | Ｎｔｎ株式会社 | Method for manufacturing hydrodynamic bearing device |
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