CN109578433A - A kind of highly reliable closed spool type hydrodynamic bearing - Google Patents
A kind of highly reliable closed spool type hydrodynamic bearing Download PDFInfo
- Publication number
- CN109578433A CN109578433A CN201811488086.1A CN201811488086A CN109578433A CN 109578433 A CN109578433 A CN 109578433A CN 201811488086 A CN201811488086 A CN 201811488086A CN 109578433 A CN109578433 A CN 109578433A
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- Prior art keywords
- bearing
- main shaft
- thrust plate
- highly reliable
- axle sleeve
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Classifications
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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
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/10—Sliding-contact bearings for exclusively rotary movement for both radial and axial load
-
- 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
- F16C33/02—Parts of sliding-contact bearings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The present invention relates to a kind of highly reliable closed spool type hydrodynamic bearings, including main shaft, the bearing rotor being sleeved on main shaft, axle sleeve between main shaft and bearing rotor, it is set in the thrust plate at main shaft both ends, increase axle sleeve in the online axle bearing structure of hydrodynamic bearing, the axle sleeve is fixed on main shaft, closing bobbin-type construction is formed with bearing rotor, thrust plate uses special bevel structure, outer gas stream is by the thrust plate with special surface by pump such as axial bearing and transverse bearing, pressure distribution is formed in bearing working gap, the Bearing inner pressure maintains dynamic stability after stabilization of speed, solve the problems, such as bearing rigidity and axial bearing start and stop friction problem；Axial compression nut uses elastic compaction mechanism, ensure that bearing axial clearance keeps stable at different temperatures；Transverse bearing friction is secondary to use boron carbide-boron carbide, and thrust axial rub pair further solves bearing touch friction, wear problem using boron carbide-structural steel form.
Description
Technical field
The present invention relates to a kind of hydrodynamic bearings, and in particular to a kind of highly reliable closed spool type boron carbide material dynamic pressure shaft
It holds.
Background technique
Hydrodynamic bearing electric machine is three float-type gyroscope tables " heart ", core component of the hydrodynamic bearing as dynamic pressure motor,
Reliability and stability decide precision and the service life of three float-type gyroscope tables, have in military fields such as aerospaces and widely answer
With.
Spool type hydrodynamic bearing is a kind of structure type of hydrodynamic bearing, and structure is divided into transverse bearing and axial bearing two
Part provides axial bearing and radial support for bearing, and the working clearance of hydrodynamic bearing only has 1 μm~3 μm, hydrodynamic bearing work
When so that inlet air flow is pumped to the helicla flute of bearing working face by the relative motion of rotor and stator, in bearing working surface shape
At pressure area, so that bearing rotor is disengaged with stator, once hydrodynamic bearing steady operation, the theoretical service life is endless.
Meanwhile hydrodynamic bearing has defect below: (1) bearing rigidity is lower, holds when low speed is transported for hydrodynamic bearing
Mechanics environment capacity is poor outside the small resistance of loading capability；(2) bearing starting, stop when due to bearing touch friction, abrasion so that
Bearing friction reliability, which reduces, even brings bearing fifth wheel, influences bearing life.
For the spool type hydrodynamic bearing that current three float-type gyroscope uses for Open architecture, transverse bearing is divided into left and right two
End structure or transverse bearing design exhaust passage, since Open architecture makes bearing working area pressure energy access release,
Bearing radial rigidity is lower.The thrust plate working face of axial bearing is often designed to plane, and its flatness is on 0.2 μm of left side
The right side, although this structure is able to maintain axial bearing face pressure, but its gas pump is limited as far as possible, meanwhile, in axial axis
It holds and causes entire working face friction in shutdown process, frictional force is brought to increase, start and stop reliability reduces.The friction that spool profile shaft is held
Secondary to reduce contact friction force using dura mater mode is coated on bearing substrate, this form has to bearing substrate performance
It asks, and coating processes are complicated, the secondary degree of reliability of coating friction is unsatisfactory.
Summary of the invention
The object of the present invention is to provide a kind of highly reliable closed spool type boron carbide material hydrodynamic bearings, solve current line
Spindle-type hydrodynamic bearing rigidity and the lower problem of start and stop reliability.
The technical solution of the invention is as follows provides a kind of highly reliable closed spool type hydrodynamic bearing, including main shaft, set
Bearing rotor on main shaft, the thrust plate for being set in main shaft both ends, between having between above-mentioned thrust plate and bearing rotor
Gap；
It is characterized in that further include axle sleeve between main shaft and bearing rotor, and above-mentioned axle sleeve is set with and fixes
On main shaft；Bearing rotor is sleeved on axle sleeve；The both ends of above-mentioned axle sleeve are fitted closely with thrust plate.
Further, the gap width between above-mentioned thrust plate and bearing rotor is gradually increased from inside to outside, is defined on master
Axis radial direction, one end close to main shaft be it is interior, one end of separate axle sleeve is outer.
Further, the gap width between above-mentioned thrust plate and bearing rotor linearly increases from inside to outside.
It further, further include axial compression nut, the axial compression nut is sleeved on main shaft both ends, stops for compressing
Push plate.
Further, the contact surface of above-mentioned axial compression nut and thrust plate is equipped with step seal face.The height of step surface
Degree is 0.1mm, so that the flexible deformation for generating 0.1mm when nut compresses compresses.
Further, the first working face of thrust plate is inclined-plane, has angle between the inclined-plane and bearing rotor end face.
Further, above-mentioned angle is 5.09 "~15.28 ".
Further, the material of axle sleeve and bearing rotor is that fine grain of the mean grain size less than or equal to 1.5 μm is carbonized
Boron material.
Further, thrust plate material is structure tool Steel material.
Further, structure tool Steel material is chromium tungsten manganese material.
Further, axial compression nut is identical as the material of main shaft.
Increase boron carbide axle sleeve in the online axle bearing structure of hydrodynamic bearing of the present invention, which is fixed on main shaft, with
Bearing rotor forms closing bobbin-type construction, and thrust plate uses special bevel structure, and outer gas stream is by having special surface
Thrust plate by pump such as axial bearing and transverse bearing, pressure distribution is formed in bearing working gap, should after stabilization of speed
Bearing inner pressure maintains dynamic stability, solves the problems, such as bearing rigidity and axial bearing start and stop friction problem；Axial compression spiral shell
Mother uses elastic compaction mechanism, ensure that bearing axial clearance keeps stable at different temperatures；Transverse bearing friction is secondary to be used
Boron carbide-boron carbide, thrust axial rub pair are further solved bearing touch and are rubbed using boron carbide-structural steel form
It wipes, wear problem.
The beneficial effects of the present invention are:
1, the closing bobbin-type construction is different from structure open and with fluid circulation, which makes to be pumped into gas quilt
It is compressed between two column workings, is pressurized by axle sleeve working face helical groove structure, do not design outlet pressure release channel；
There is higher rigidity ability under identical rotation speed；
2, the thrust plate of axial bearing is the structure of special surface, can reduce bearing and is carrying out axial starting stopping time and bearing
Contact friction force square between rotor.Meanwhile under identical rotor speed, the thrust plate of special surface design can pass through it
Helical groove structure is pumped into more air-flows, promotes Bearing inner pressure rise, and then promote bearing rigidity；
3, clamp nut designs flexible compressing structure, and clamp nut is flexible compressing structure, by controlling its compression
Torque makes nut generate certain flexible deformation pressure, even if axial bearing causes different bearing materials to occur due to temperature change
Line rises when changing, which ensures that thrust plate positioning surface can abut against the end of axle sleeve by the release of flexible deformation
Portion, it is ensured that axial bearing clearance remains unchanged；
4, transverse bearing is secondary using boron carbide-boron carbide friction, it is surface coating modified can to evade bearing main material, to drop
Low coating material bring integrity problem, fine grain boron carbide material has very high abrasive resistance and lower friction is
Number can reach higher line position precision by precise finiss, and transverse bearing uses same material, under different temperature environments
Bearing clearance is still able to maintain stabilization.
5, axial bearing uses boron carbide-structure steel-steel pair, and wherein thrust plate is structure tool Steel material, passes through structure
The hardness of tool steel is less than the principle of fine grain boron carbide hardness, the deformation that axial bearing can be made to generate in start and stop friction
Occur to alleviate the secondary abrasion of friction by the plastic deformation of tool steel in structure tool steel side, it is extra to reduce bearing wear
Object risk.
Detailed description of the invention
Fig. 1 is example structure schematic diagram；
Appended drawing reference in figure are as follows: 1- bearing rotor, 2- thrust plate, 3- axle sleeve, 4- main shaft, 5- clamp nut, 6- thrust plate
First working face, the second working face of 7- thrust plate.
Specific embodiment
With reference to the accompanying drawing and specific embodiment is further described through the present invention.It should be noted that cannot be with this
Embodiment limits the scope of protection of the present invention.
It will be seen from figure 1 that the present embodiment hydrodynamic bearing, including main shaft 4, axle sleeve 3, bearing rotor 1, thrust plate 2 and pressure
Tight nut 5, axle sleeve 3 are sleeved on main shaft 4 and with 4 secure fits of main shaft, and bearing rotor 1 is assembled together with axle sleeve, opposite to transport
It is dynamic, radial-sealing bearing is formed, thrust plate 2 is located at 3 two sides of axle sleeve, forms axial bearing with bearing rotor 1.Wherein thrust plate 2
Material be structure tool steel (such as: chromium tungsten manganese material), bearing rotor 1 is fine grain boron carbide material, and axle sleeve 3 is fine grain
Boron carbide material, clamp nut 5 and main shaft 4 are same material (such as: 3Cr13, titanium alloy).Therefore, radial in the present embodiment
Bearing is secondary using boron carbide-boron carbide friction, and axial bearing uses boron carbide-structure steel-steel pair.Transverse bearing is using carbonization
The friction of boron-carbon boron is secondary, and fine grain boron carbide material has very high abrasive resistance and lower coefficient of friction, is ground by precision
Mill can reach higher line position precision, and because using same material, remain in different temperature environment lower radial bearing gaps
It keeps stablizing.Axial bearing uses boron carbide-structure steel-steel pair, is less than fine grain boron carbide by the hardness of structure tool steel
The principle of hardness, the deformation that axial bearing can be made to generate in start and stop friction occur to pass through work in structure tool steel side
Being plastically deformed to alleviate the secondary abrasion of friction for tool steel, reduces bearing wear fifth wheel risk.Axial compression spiral shell in the present embodiment
Mother is designed using elastic construction, i.e., from figure 1 it appears that being with height on the end face that clamp nut is contacted with thrust plate
The step surface of 0.1mm guarantees the stability of bearing clearance so that the flexible deformation for generating 0.1mm when nut compresses compresses.
Gap width between thrust plate 2 and bearing rotor 1 linearly increases from inside to outside；It defines and is close to one end of main shaft
Interior, one end far from axle sleeve is outer.By the way that the working face of thrust plate is designed as inclined-plane in the present embodiment so that thrust plate 2 with
Gap width between bearing rotor 1 linearly increases from inside to outside, can reduce bearing and is carrying out axial starting stopping time and bearing turn
Contact friction force square between son 1.Meanwhile under identical rotor speed, the thrust plate 2 of special surface design can pass through it
Helical groove structure is pumped into more air-flows, promotes Bearing inner pressure rise, and then promote bearing rigidity.Thrust in the present embodiment
The structure of plate 2 is specially ring-type, and the face that will be close to bearing rotor and axle sleeve is defined as the working face of thrust plate, for the ease of retouching
It states, which is divided into the first working face of thrust plate 6 and the second working face of thrust plate 7, the second working face of thrust plate 7 and axle sleeve
It compresses, radical length is identical as the thickness of axle sleeve 3, might be less that the thickness of axle sleeve 3, the first working face of thrust plate 6 is oblique
There is angle, the size of the angle is about 5.09 "~15.28 " between face, and the end face of bearing rotor 1.
Specific work process of the invention is as follows:
1, hydrodynamic bearing axis is horizontally arranged in situation, and when electric motor starting, bearing rotor 1 starts under the action of electromagnetic torque
Rotation, bearing rotor 1 and axle sleeve 3 generate friction, since transverse bearing is that boron carbide-boron carbide friction is secondary, significantly reduce diameter
To the coefficient of sliding friction of bearing, and closing bobbin structure can be such that transverse bearing pressure increases rapidly, reduce bearing rotor 1 with
Contact fraction time between axle sleeve 3, after reaching certain revolving speed, bearing rotor 1 is disengaged with axle sleeve 3.Motor stabilizing work
When, by 2 special surface structure of thrust plate, so that more gases are pumped in bearing working gap, and maintain higher
Under operating pressure, make bearing rigidity ability with higher.In motor stopped process, with the gradually drop of 1 revolving speed of bearing rotor
Low, Bearing inner pressure is released, and when bearing working face gas film stiffness is not enough to maintain 1 weight of bearing rotor, bearing turns
Son 1 starts contact slide friction with axle sleeve 3, until stopping.
2, in the case of hydrodynamic bearing axis is placed vertically, when electric motor starting, bearing rotor 1 starts under the action of electromagnetic torque
Rotation, bearing rotor 1 and thrust plate 2 generate friction, since axial bearing is boron carbide-structure steel-steel pair, and thrust plate work
Making face is special surface structure, significantly reduces the coefficient of sliding friction of axial bearing and generates the risk of abrasion fifth wheel, should
2 structure of thrust plate can be pumped such as more air-flows, improve bearing working surface pressure rapidly, after reaching certain revolving speed, bearing rotor 1
It is disengaged with thrust plate 2.When motor stabilizing works, bearing working face maintains under relatively high operating pressure, to have bearing
Higher rigidity ability.In motor stopped process, with gradually decreasing for 1 revolving speed of bearing rotor, Bearing inner pressure is released
It puts, when bearing working face gas film stiffness is not enough to maintain 1 weight of bearing rotor, bearing rotor 1 starts to contact cunning with thrust plate 2
Dynamic friction, until stopping.
3, when the oblique placement of hydrodynamic bearing axis, the course of work is the compound of both the above working condition.
Claims (10)
1. a kind of highly reliable closed spool type hydrodynamic bearing, including main shaft (4), the bearing rotor being sleeved on main shaft (4)
(1), it is set in the thrust plate (2) at main shaft both ends, has gap between the thrust plate (2) and bearing rotor (1)；
It is characterized by also including the axle sleeve (3) between main shaft (4) and bearing rotor (1), axle sleeve (3) suit is simultaneously
It is fixed on main shaft (4)；Bearing rotor (1) is sleeved on axle sleeve (3)；The both ends and thrust plate (2) of the axle sleeve (3) are closely pasted
It closes.
2. highly reliable closed spool type hydrodynamic bearing according to claim 1, it is characterised in that: the thrust plate (2)
Gap width between bearing rotor (1) is gradually increased from inside to outside；It is defined on main shaft radial direction, close to one end of main shaft
To be interior, one end far from axle sleeve is outer.
3. highly reliable closed spool type hydrodynamic bearing according to claim 2, it is characterised in that: the thrust plate (2)
Gap width between bearing rotor (1) linearly increases from inside to outside.
4. highly reliable closed spool type hydrodynamic bearing according to claim 3, it is characterised in that: further include axial compression
Nut (5), the axial compression nut (5) is sleeved on main shaft (4) both ends, for compressing thrust plate (2).
5. highly reliable closed spool type hydrodynamic bearing according to claim 4, it is characterised in that: the axial compression spiral shell
The contact surface of female (5) and thrust plate (2) is equipped with step seal face.
6. highly reliable closed spool type hydrodynamic bearing according to claim 3, it is characterised in that: thrust plate first works
Face (6) is inclined-plane, has angle between the inclined-plane and bearing rotor (1) end face.
7. highly reliable closed spool type hydrodynamic bearing according to claim 6, it is characterised in that: the angle is
5.09 "~15.28 ".
8. highly reliable closed spool type hydrodynamic bearing according to claim 6, it is characterised in that: axle sleeve (3) and bearing
The material of rotor (1) is the fine grain boron carbide material that mean grain size is less than or equal to 1.5 μm.
9. highly reliable closed spool type hydrodynamic bearing according to claim 6, it is characterised in that: thrust plate (2) material
For structure tool Steel material.
10. highly reliable closed spool type hydrodynamic bearing according to claim 9, it is characterised in that: structure tool steel
Material is chromium tungsten manganese material；Axial compression nut (5) is identical as the material of main shaft (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811488086.1A CN109578433B (en) | 2018-12-06 | 2018-12-06 | High-reliability closed type spool type dynamic pressure bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811488086.1A CN109578433B (en) | 2018-12-06 | 2018-12-06 | High-reliability closed type spool type dynamic pressure bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109578433A true CN109578433A (en) | 2019-04-05 |
| CN109578433B CN109578433B (en) | 2020-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811488086.1A Active CN109578433B (en) | 2018-12-06 | 2018-12-06 | High-reliability closed type spool type dynamic pressure bearing |
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| Country | Link |
|---|---|
| CN (1) | CN109578433B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114790996A (en) * | 2022-04-19 | 2022-07-26 | 广东美芝制冷设备有限公司 | Fan and cleaning device |
| CN115655250A (en) * | 2022-12-14 | 2023-01-31 | 西安航天精密机电研究所 | Gyroscope and processing and assembling method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4357837A (en) * | 1979-11-16 | 1982-11-09 | Smiths Industries Public Limited Company | Dynamically tuned gyroscopes |
| WO2005067569A3 (en) * | 2004-01-04 | 2005-12-22 | Halliburton Energy Serv Inc | Method and apparatus for detecting hydrocarbons with nmr logs in wells drilled with oil-based muds |
| CN101153629A (en) * | 2006-09-27 | 2008-04-02 | 日本电产株式会社 | Fluid dynamic bearing device and storage disk driving device using the same |
| CN102434586A (en) * | 2011-09-20 | 2012-05-02 | 中国船舶重工集团公司第七○七研究所 | Gas-magnetic hybrid bearing for gyro motor use |
| CN104747595A (en) * | 2015-02-04 | 2015-07-01 | 中国船舶重工集团公司第七0七研究所 | Aerodynamic bearing with high reliability and long service life |
-
2018
- 2018-12-06 CN CN201811488086.1A patent/CN109578433B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4357837A (en) * | 1979-11-16 | 1982-11-09 | Smiths Industries Public Limited Company | Dynamically tuned gyroscopes |
| WO2005067569A3 (en) * | 2004-01-04 | 2005-12-22 | Halliburton Energy Serv Inc | Method and apparatus for detecting hydrocarbons with nmr logs in wells drilled with oil-based muds |
| CN101153629A (en) * | 2006-09-27 | 2008-04-02 | 日本电产株式会社 | Fluid dynamic bearing device and storage disk driving device using the same |
| CN102434586A (en) * | 2011-09-20 | 2012-05-02 | 中国船舶重工集团公司第七○七研究所 | Gas-magnetic hybrid bearing for gyro motor use |
| CN104747595A (en) * | 2015-02-04 | 2015-07-01 | 中国船舶重工集团公司第七0七研究所 | Aerodynamic bearing with high reliability and long service life |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114790996A (en) * | 2022-04-19 | 2022-07-26 | 广东美芝制冷设备有限公司 | Fan and cleaning device |
| CN114790996B (en) * | 2022-04-19 | 2024-02-06 | 广东美芝制冷设备有限公司 | Blower and cleaning device |
| CN115655250A (en) * | 2022-12-14 | 2023-01-31 | 西安航天精密机电研究所 | Gyroscope and processing and assembling method thereof |
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| Publication number | Publication date |
|---|---|
| CN109578433B (en) | 2020-11-06 |
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