CN106499728A - Turn the method for adjustment of stator component and its bias - Google Patents
Turn the method for adjustment of stator component and its bias Download PDFInfo
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- CN106499728A CN106499728A CN201510566424.9A CN201510566424A CN106499728A CN 106499728 A CN106499728 A CN 106499728A CN 201510566424 A CN201510566424 A CN 201510566424A CN 106499728 A CN106499728 A CN 106499728A
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Abstract
The present invention provides a kind of method of adjustment for turning stator component and its bias, the method of adjustment includes for outer race, concentric ring, bearing spider being assembled into a test suite, in test suite, the radial direction ring wall of concentric ring is located between the radial direction anchor ring of resilient support, bearing spider, and axial ring wall is folded between the axial anchor ring of resilient support, bearing spider；The offset and eccentric position of the inner surface of the test suite middle (center) bearing outer shroud is measured, and turns the settlement of support amount under stator consideration Action of Gravity Field with reference to this, obtain the offset for needing processing, eccentric hoop is processed into choosing identical concentric ring accordingly；Outer race, eccentric hoop and bearing spider are assembled into an assembling assembly, and are measured, adjusted offset, until the offset for designing.
Description
Technical field
The present invention relates to the method for adjustment for turning stator component and its bias of aero-engine.
Background technology
Aero-engine is mainly made up of the stator part of the rotor and supporting rotor that rotate at a high speed, is processed, filled at which
With and the course of work in, the turning of engine, stator nonconcentricity can change in certain margin of tolerance, and its result be
Impact is produced on the performance of complete machine oscillation and engine.Turn, the optimization of stator nonconcentricity is supported by changing stator
Offset, and then reach the minimum target of nonconcentricity between rotor and stator.Existing stator supports the tune of offset
Whole main by adding adjustment sleeve in bearing block or bearing block being processed into bias directly, the main pin of the two methods
The stator bias that turns on vertical direction that the settlement of support that rotor deadweight causes is produced is adjusted, not to adding
The stator bias that turns on other directions that work, assembling are produced is adjusted.
Content of the invention
It is an object of the invention to provide a kind of method of adjustment for turning stator component and its bias.
A kind of method of adjustment for turning stator component bias, which includes
Step one, offer bearing bullet device, the bearing bullet device include bearing inner ring and outer race, institute
State, the bearing inner ring is used for accepting rotor；
Step 2, offer bearing spider, the bearing spider are used for being installed on stator；
Step 3, offer concentric ring, the concentric ring have axial ring wall and radial direction ring wall；
Step 4, the outer race, the concentric ring, the bearing spider are assembled into a test suite,
In the test suite, the radial direction ring wall is located in the radial direction anchor ring of the resilient support, the bearing spider
Between, the axial ring wall is folded between the axial anchor ring of the resilient support, the bearing spider, and respectively
Fastened by securing member with the described axial anchor ring of the resilient support, the bearing spider, passed through by securing member
The resilient support, the concentric ring, the bearing spider are fastened by the through hole of the radial direction ring wall；
Step 5, the offset and eccentric position that measure the inner surface of outer race described in the test suite；
Step 6, the offset according to measuring, eccentric position, and turn stator consideration Action of Gravity Field with reference to this
Under settlement of support amount, obtain need processing offset, to choose identical concentric ring be processed into eccentric hoop, right
The processing of concentric ring is on the surface with the spring-loaded contact of the axial ring wall to process the needs
The offset of processing；And
Step 7, the outer race, the eccentric hoop and the bearing spider are assembled into an assembling assembly, are surveyed
The offset of outer race inner surface described in the assembling assembly is measured, the axial direction for adjusting the eccentric hoop is then rotated further by
The position of ring wall and a bullet sidewall contact, the offset of outer race inner surface described in the assembling assembly
For the offset for designing.
In a preferred embodiment, in the step 7, first with part fasteners fix the outer race,
The eccentric hoop and the bearing spider, then adjust the offset of the outer race inner surface again, until which is
The offset of design, then fixes the outer race, the eccentric hoop and the bearing with whole securing members again
Seat.
In a preferred embodiment, in step 4, the test suite and rotating disk are fixed together, are rotated described
Dishpan simulation rotor rotates, then moves the measurement table bar on special tooling so that dial gauge/thousand that are fixed on table bar
Divide the indicator of table contact with the inner surface of the outer race, and the fixation measurement table bar；Revolve in first time
Turn the rotating disk, check whether measurement table is all contacted with outer race, but the position of measurement table is scheduled on and is started
Machine is along 12 o'clock position directly over course, and this point is set to " 1 " number position, while measurement table is returned to zero, the
Secondary rotating rotor, measures the offset of uniform 8 points of the inner surface of the outer race and records numerical value,
According to the numerical value of record, the maximum eccentricity amount of the inner surface of the outer race and corresponding position is calculated.
In a preferred embodiment, in step 7, to the horizontal, radially and tiltedly square of the outer race inner surface
To carrying out eccentric adjustment.
In a preferred embodiment, in the test suite or assembling assembly, the resilient support is enclosed within described same
The outside of the radial direction ring wall of thimble or eccentric hoop.
In a preferred embodiment, in the test suite or assembling assembly, the resilient support is enclosed in described
The inner side of the radial direction ring wall of concentric ring or eccentric hoop.
A kind of eccentric adjusting apparatus of stator component that turn include：Bearing bullet device, bearing spider and eccentric hoop,
Bearing bullet device includes bearing inner ring and outer race, is bonded to resilient support, the axle on the outer race
Holding inner ring is used for accepting rotor；Bearing spider is used for being installed on stator；Eccentric hoop has axial ring wall and footpath
To ring wall；Wherein, the outer race, the eccentric hoop, the bearing spider are assembled into an assembling assembly,
In the assembling assembly, the radial direction ring wall is located in the radial direction anchor ring of the resilient support, the bearing spider
Between, the axial ring wall is folded between the axial anchor ring of the resilient support, the bearing spider, and respectively
Coordinate with the described axial anchor ring gap of the resilient support, the bearing spider, the footpath is passed through by securing member
The resilient support, the concentric ring, the bearing spider are fastened to the through hole of ring wall；The radial direction ring wall
Offset with the surface of the spring-loaded contact be the offset of the inner surface to the outer race, this turn quiet
The complementation of the settlement of support amount under son consideration Action of Gravity Field, so that it is concentric to turn stator component.
In a preferred embodiment, the outside for flexibly supporting the radial direction ring wall for being enclosed within the eccentric hoop.
In a preferred embodiment, the inner side for flexibly supporting the radial direction ring wall for being enclosed in the eccentric hoop.
In an embodiment of the present invention, by concentric ring pre-assembled bearing outer ring and bearing spider and after measuring assembling
The concentricity of test suite, can obtain the offset of the stator supporting that every engine brings because of processing, build-up tolerance,
And it is suitable for the eccentric machine of the engine according to this offset with reference to the settlement of support amount processing that rotor deadweight causes
The axial ring wall of the concentric ring of processing, obtaining to carry out the eccentric hoop of eccentric adjustment, shake so as to improve the whole machine of engine
Dynamic characteristic and performance, while structural modification very little of the method to engine itself, only increases an eccentric shaped part,
Version is simple.
In an embodiment of the present invention, axially symmetric structure of the eccentric hoop for L-type, version are simple, axial rings
Wall, radial direction ring wall thickness little, take up room little；In structure design only need to resilient support and bearing spider it
Between radial and axial leave physical space with closing, little to adjacent structural modification.
Description of the drawings
The above and other features of the present invention, property and advantage will pass through with reference to the accompanying drawings and examples
Describe and become readily apparent from, wherein：
Schematic diagrames of the Fig. 1 for one embodiment of the invention transfer stator component；
Fig. 2 is the decomposition view of quiet rotor assembly in Fig. 1；
Fig. 3 is the zoomed-in view of eccentric hoop installation site in Fig. 1；
Fig. 4 is the zoomed-in view of eccentric hoop installation site in another enforcement of the invention；
Fig. 5 is the schematic diagram of the misalignment measurement of rotor in one embodiment of the invention；
Fig. 6 is the schematic diagram of eccentric hoop in one embodiment of the invention；
Fig. 7 is the schematic diagram of eccentric hoop in another embodiment of the present invention.
Specific embodiment
With reference to specific embodiments and the drawings, the invention will be further described, elaborates in the following description more
Many details are in order to fully understand the present invention, but the present invention obviously can be with other described different from this multiple
Mode implementing, those skilled in the art can without prejudice to intension of the present invention in the case of according to practical situations
Make similar popularization, deduce, therefore should not be limited the scope of the invention with the content of this specific embodiment.
Fig. 1, Fig. 2, Fig. 3, Fig. 4 show the schematic diagram of quiet rotor assembly in one embodiment of the invention.Need
It is noted that these and follow-up others accompanying drawing are only used as example, which is painted according to the condition of equal proportion
System, and should be in this, as not being construed as limiting to the protection domain of actual requirement of the present invention.
As shown in Figure 1 to Figure 3, the off-center adjustment apparatus for turning stator component include bearing bullet device 2, bearing
Seat 3 and eccentric hoop 4, bearing bullet device 2 include bearing inner ring 24 and outer race 25, outer race
Resilient support 26 is bonded on 25.Resilient support 26 can be integrated part with outer race 25 or link together
Split part.Bearing inner ring 24 is used for accepting rotating shaft 1.Bearing spider 3 is used for being installed on stator.Eccentric
Ring 4 has radial direction ring wall 41 and axial ring wall 42.Axially, it is radially to be to turn the design centre axis of stator
With reference to the direction for being roughly parallel to design centre axis is axial direction, and the direction for being approximately perpendicular to design centre axis is
Radially.The radial direction of the substantially quiet rotor of the bearing of trend of radial direction ring wall 41, the bearing of trend of axial ring wall 42 are big
Cause the axial direction for quiet rotor.Radial direction ring wall 41 is folded in the radial direction anchor ring 260 of resilient support 26, bearing spider 3
Radial direction anchor ring 31 between, in other words radial direction ring wall 41 be enclosed within resilient support 26 radial direction anchor ring 260, support
Between the radial direction anchor ring 31 of bearing 3.Axial ring wall 42 is located in the axial anchor ring 261, axle of resilient support 26
Hold between the axial anchor ring 32 of bearing 3, and axial anchor ring 261 respectively with resilient support 26, bearing spider 3
32 gap of axial anchor ring coordinate, by securing member 8 through radial direction ring wall 41 through hole will flexibly support 26,
Eccentric hoop 4, bearing spider 3 are fastened.
As shown in fig. 7, through hole 43 is provided with the radial direction ring wall 42 of eccentric hoop 4, for wearing for securing member 8
Cross, securing member 8 can be high accuracy bolt.The outer surface 421 of the axial ring wall 42 of eccentric hoop 4 and elasticity
261 gap of axial anchor ring of support 26 coordinates, and outer surface 421 is the surface formed by machining as described later,
For adjusting the bias of 25 inner surface of outer race.The inner surface 420 of the axial ring wall 42 of eccentric hoop 4 is used for
Coordinate with 32 gap of axial anchor ring that bearing spider 3 is provided.Axis L1 is the axle center of anchor ring 421 in the figure 7,
Axle center of the axis L2 for anchor ring 420.
As shown in Figure 4 and Figure 6, in another embodiment of the invention, the axial ring wall 42 of eccentric hoop 4 is interior
Surface 421 is coordinated with 261 gap of axial anchor ring of resilient support 26, the outer surface 420 of axial ring wall 42 with
32 gap of axial anchor ring of bearing spider 3 coordinates, i.e. the axial ring wall 42 of eccentric hoop 4 is enclosed within resilient support 26
Axial anchor ring 261 outside and be placed on the inside of the axial anchor ring 32 of bearing spider 3.Now, axial rings
The surface that the inner surface 421 of wall 42 is formed for machining, for adjusting the bias of 25 inner surface of outer race.
In figure 6, axle center of the axis L1 for anchor ring 421, axle center of the axis L2 for anchor ring 420.
As shown in figure 1, the load that 1 gravity of rotating shaft causes is delivered to outer race 25 by bearing inner ring 24,
Be delivered to resilient support 26 again, then bearing spider 3 is delivered to via eccentric hoop 4.If without eccentric hoop 4, turning quiet
The bias one of sub-component is that the rotor of engine, stator are not due to turning the processing of stator component, in assembling process
Concentricity can change in certain margin of tolerance；Another reason is sunk because rotor deadweight produces bearing pivot.
Eccentric hoop 4 can overcome these factors to adjust the bias for turning stator.The off-center adjustment apparatus are only with an eccentric hoop
It is adjusted, which is the axially symmetric structure of L-type, version is simple；Axial ring wall, the thickness of radial direction ring wall
5～10mm is taken at typically, is taken up room little；Only need to be between resilient support and bearing spider in structure design
Radial and axial leave physical space with closing, little to adjacent structural modification.
In conjunction with Fig. 1 to Fig. 7, the enforcement for turning the eccentric method of adjustment of stator component according to the present invention is described below
Example, wherein, step one, offer bearing bullet device 2.In step 2, there is provided bearing spider 3.In step
In three, there is provided concentric ring, concentric ring are not shown in figure, can be by means of the bias shown in Fig. 6 or Fig. 7
Understanding, the anchor ring 421 in the anchor ring 421, Fig. 7 of Fig. 6 is not processed to adapt to turn the inclined of stator ring
Before the heart, even increase and be machined the part of removing, it shown in Fig. 6, Fig. 7 can be just concentric ring to be exactly.
I.e. concentric ring is the face coordinated with the axial anchor ring 261 for flexibly supporting 26 not with the difference with eccentric hoop 4
With the mating surface of concentric ring is concentric anchor ring, and the mating surface of eccentric hoop 4 is eccentric anchor ring.
Outer race 25, the concentric ring, bearing spider 3 are assembled into a test suite in step 4,
As shown in figure 5, assembling mode is as shown in Fig. 3 and Fig. 4, the axial ring wall chuck of concentric ring is in resilient support
Axial anchor ring and the axial anchor ring of bearing spider between；
The offset and eccentric position of the inner surface of the test suite middle (center) bearing outer shroud 25 is measured in step 5,
Measuring method can be that again the test suite is fixed together with rotating disk 5, rotate the rotation of 5 model rotor of sabot,
Measurement table bar 7 special tooling 6 on is moved again so that the indicator of the dial gauge that is fixed on table bar or amesdial can
To contact with 25 inner surface of outer race, fixed table bar 7.Whether first time rotary turnplate 5, check measurement table
With 25 whole contacts of outer race.The position of measurement table bar 7 is scheduled on engine along directly over course 12 finally
O'clock position, and by this point be set to " 1 " number position, while measurement table is returned to zero.Second rotary turnplate 5, surveys
Amount outer race 25 inner surface on uniform 8 points offset and record numerical value, according to record numerical value, calculate
Obtain the maximum eccentricity amount of outer race 25 and corresponding position.Test suite is split after being measured.
In step 6 according to measure the offset, eccentric position, and engage this turn stator consideration gravity make
Settlement of support amount with, obtains the offset for needing processing, is processed into eccentric hoop to choosing identical concentric ring,
It is on the surface contacted with the axial anchor ring 261 of resilient support 26 of axial ring wall 42 to the processing of concentric ring
The offset for needing processing is processed, in the embodiment shown in fig. 6, the surface is inner surface 421 pairs
The concentric ring surface that answers, in the embodiment shown in fig. 7, the surface is 421 corresponding concentric ring table of outer surface
Face.
In step 7, outer race 25, eccentric hoop 4 and bearing spider 3 are assembled into an assembling assembly, such as
The offset of 25 inner surface of assembling assembly middle (center) bearing outer shroud shown in Fig. 5, is measured, adjustment is then rotated further by eccentric
The position that the axial ring wall 42 of ring 4 is contacted with the axial anchor ring 261 of resilient support 26, until the component axis
The offset for holding the inner surface of outer shroud 4 is the offset of design.In a preferred embodiment, tight using part
After assembling assembly and rotating disk 5 are fixed by firmware, first time rotary turnplate 5 measures the inner surface of outer race 4
Offset records uniform 8 points of numerical value simultaneously, then further adjusts the position of eccentric hoop 4 according to numerical value
Till qualified, then remaining securing member is all installed in place, again rotary turnplate 5, reads measurement table bar
7 numerical value, checks whether that the end value of pre-test therewith is consistent, or whether can also meet design after there is deviation partially
Heart amount requires, completes this work, such as do not meet, then unclamp all of securing member and readjust partially if meeting
The position of thimble, re-adjustments work, until last numerical value meets technical requirement on design.
In aforesaid method of adjustment, the offset for adjusting the inner ring of outer race 25 is not meant to the bias of bearing
It is classified as 0, but the impact according to the actual conditions under working rotor state and gravity, in advance by outer race 25
Bias is adjusted in the assembled condition.Caused by under the influence of because conducting oneself with dignity in rotor, rotor eccentricity is in outer race 25
Below concentric line, therefore ordinary circumstance is to move up the bias of outer race 25, but offset very little, is turning
The eccentric upwards of sub- working condition lower bearing outer shroud 25 causes rotor fulcrum to float, and reaches and will adjust at rotor fulcrum
The concentrically purpose of state.
Although the present invention is disclosed as above with preferred embodiment, which is not any this area for limiting the present invention
Technical staff without departing from the spirit and scope of the present invention, can make possible variation and modification.Therefore,
Every content without departing from technical solution of the present invention, according to appointing that the technical spirit of the present invention is made to above example
What modification, equivalent variations and modification, each falls within the protection domain defined by the claims in the present invention.
Claims (9)
1. the eccentric method of adjustment of stator component is turned, it is characterised in that included
Step one, offer bearing bullet device, the bearing bullet device include bearing inner ring and outer race, institute
State, the bearing inner ring is used for accepting rotor；
Step 2, offer bearing spider, the bearing spider are used for being installed on stator；
Step 3, offer concentric ring, the concentric ring have axial ring wall and radial direction ring wall；
Step 4, the outer race, the concentric ring, the bearing spider are assembled into a test suite,
In the test suite, the radial direction ring wall is located in the radial direction anchor ring of the resilient support, the bearing spider
Between, the axial ring wall is folded between the axial anchor ring of the resilient support, the bearing spider, and respectively
Coordinate with the described axial anchor ring gap of the resilient support, the bearing spider, the footpath is passed through by securing member
The resilient support, the concentric ring, the bearing spider are fastened to the through hole of ring wall；
Step 5, the offset and eccentric position that measure the inner surface of outer race described in the test suite；
Step 6, the offset according to measuring, eccentric position, and turn stator consideration Action of Gravity Field with reference to this
Under settlement of support amount, obtain need processing offset, to choose identical concentric ring be processed into eccentric hoop, right
The processing of concentric ring is on the surface with the spring-loaded contact of the radial direction ring wall to process the needs
The offset of processing；And
Step 7, the outer race, the eccentric hoop and the bearing spider are assembled into an assembling assembly, are surveyed
The offset of outer race inner surface described in the assembling assembly is measured, the axial direction for adjusting the eccentric hoop is then rotated further by
The position of ring wall and a bullet sidewall contact, the offset of outer race inner surface described in the assembling assembly
For the offset for designing.
2. the method for adjustment as claimed in claim 1, it is characterised in that in step 7, tight with part first
Firmware fixes the outer race, the eccentric hoop and the bearing spider, and measures the outer race inner surface
Offset, according to the result of measurement, adjust the offset of the outer race inner surface, until which is design
Offset, then fixes the outer race, the eccentric hoop and the bearing spider with whole securing members again.
3. the method for adjustment as claimed in claim 1, it is characterised in that in step 4, by the test suite
It is fixed together with rotating disk, rotates the dishpan simulation rotor rotation, then the measurement table bar moved on special tooling makes
The indicator of the dial gauge/amesdial that must be fixed on table bar can be contacted with the inner surface of the outer race, and solid
The fixed measurement table bar；The rotating disk is rotated in first time, check whether measurement table is all contacted with outer race,
But the position of measurement table is scheduled on engine along 12 o'clock position directly over course, and this point is set to " 1 "
Number position, while measurement table is returned to zero, second rotor, measure the outer race inner surface uniform 8
The offset of individual point simultaneously records numerical value, according to the numerical value of record, is calculated the inner surface of the outer race most
Large eccentricity amount and corresponding position.
4. the method for adjustment as claimed in claim 1, it is characterised in that in step 7, to the bearing outside
Horizontal, the vertical and tilted direction of ring inner surface carries out eccentric adjustment.
5. the method for adjustment as claimed in claim 1, it is characterised in that in the test suite or assembling assembly
In, the resilient support is enclosed within the outside of the radial direction ring wall of the concentric ring or eccentric hoop.
6. the method for adjustment as claimed in claim 1, it is characterised in that in the test suite or assembling assembly
In, the resilient support is enclosed in the inner side of the radial direction ring wall of the concentric ring or eccentric hoop.
7. the eccentric adjusting apparatus of stator component are turned, it is characterised in that included：
Bearing bullet device, including bearing inner ring and outer race, is bonded to resilient support on the outer race,
The bearing inner ring is used for accepting rotor；
Bearing spider, for being installed on stator；And
Eccentric hoop, with axial ring wall and radial direction ring wall；
Wherein, the outer race, the eccentric hoop, the bearing spider are assembled into an assembling assembly, in institute
State in assembling assembly, the radial direction ring wall is located between the radial direction anchor ring of the resilient support, the bearing spider,
The axial ring wall is folded between the axial anchor ring of the resilient support, the bearing spider, and respectively with described
Resilient support, the described axial anchor ring gap of the bearing spider coordinate, and pass through the radial direction ring wall by securing member
Through hole by the resilient support, the concentric ring, the bearing spider fastening；The radial direction ring wall with described
The offset on the surface of spring-loaded contact be the inner surface to the outer race offset, this turn stator consideration
The complementation of the settlement of support amount under Action of Gravity Field, so that it is concentric to turn stator component.
8. adjusting apparatus as claimed in claim 7, it is characterised in that in assembling assembly, the elasticity
Support set is in the outside of the radial direction ring wall of the eccentric hoop.
9. adjusting apparatus as claimed in claim 7, it is characterised in that in assembling assembly, the elasticity
Support is enclosed in the inner side of the radial direction ring wall of the eccentric hoop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510566424.9A CN106499728B (en) | 2015-09-08 | 2015-09-08 | Turn the method for adjustment of stator component and its bias |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510566424.9A CN106499728B (en) | 2015-09-08 | 2015-09-08 | Turn the method for adjustment of stator component and its bias |
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| Publication Number | Publication Date |
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| CN106499728A true CN106499728A (en) | 2017-03-15 |
| CN106499728B CN106499728B (en) | 2018-10-30 |
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| CN201510566424.9A Active CN106499728B (en) | 2015-09-08 | 2015-09-08 | Turn the method for adjustment of stator component and its bias |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109514465A (en) * | 2018-11-29 | 2019-03-26 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of long axis class spare part assembly guide clamp and application method |
| CN110631540A (en) * | 2019-10-11 | 2019-12-31 | 中国航发沈阳发动机研究所 | Method for calculating eccentricity of supporting point eccentric bushing of aero-engine |
| CN113074680A (en) * | 2020-01-06 | 2021-07-06 | 中国航发商用航空发动机有限责任公司 | Device and method for measuring axial maximum play amount of rotor |
| CN115949670A (en) * | 2023-03-09 | 2023-04-11 | 中国航发四川燃气涡轮研究院 | Elastic structure for axial compression of bearing |
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| WO2011085831A1 (en) * | 2010-01-14 | 2011-07-21 | Koenig & Bauer Aktiengesellschaft | Device for bearing one or more cylinders of a printing press |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109514465A (en) * | 2018-11-29 | 2019-03-26 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of long axis class spare part assembly guide clamp and application method |
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| CN110631540A (en) * | 2019-10-11 | 2019-12-31 | 中国航发沈阳发动机研究所 | Method for calculating eccentricity of supporting point eccentric bushing of aero-engine |
| CN113074680A (en) * | 2020-01-06 | 2021-07-06 | 中国航发商用航空发动机有限责任公司 | Device and method for measuring axial maximum play amount of rotor |
| CN113074680B (en) * | 2020-01-06 | 2023-01-20 | 中国航发商用航空发动机有限责任公司 | Device and method for measuring axial maximum play amount of rotor |
| CN115949670A (en) * | 2023-03-09 | 2023-04-11 | 中国航发四川燃气涡轮研究院 | Elastic structure for axial compression of bearing |
| CN115949670B (en) * | 2023-03-09 | 2023-06-30 | 中国航发四川燃气涡轮研究院 | Elastic structure for axial compression of bearing |
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|---|---|
| CN106499728B (en) | 2018-10-30 |
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