CN107344245A - A kind of electro spindle angular contact ball bearing pretightening force controlling mechanism - Google Patents
A kind of electro spindle angular contact ball bearing pretightening force controlling mechanism Download PDFInfo
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- CN107344245A CN107344245A CN201710705764.4A CN201710705764A CN107344245A CN 107344245 A CN107344245 A CN 107344245A CN 201710705764 A CN201710705764 A CN 201710705764A CN 107344245 A CN107344245 A CN 107344245A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
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Abstract
A kind of electro spindle angular contact ball bearing pretightening force controlling mechanism of disclosure of the invention, circlip for hole, angular contact ball bearing, oil scraper ring are sleeved on main shaft successively, three layers of sleeve are installed between the bearing of mounted in pairs, non-contact temperature sensor is installed between bearing and oil scraper ring, angular acceleration vibrating sensor is installed on electro spindle end, and atomizer is installed on one side on the outside of bearing.Drive power supply for piezoelectric ceramics, connector, oil connect nozzle and water connects nozzle on the end cap of electro spindle afterbody.Drive power supply for piezoelectric ceramics laminates electroceramics sleeve with two annular stacks by circuit and is connected.Technical scheme automatically adjusts pretightning force technology by good, the effectively pretightning force of regulation electric mainshaft bearing, regulate and control electro spindle temperature rise, reduce noise, improve the support accuracy, running accuracy, life-span of bearing, so as to improve the dynamic property of electro spindle, the machining accuracy and operating efficiency of the lathe using spindle motor unit are improved.
Description
Technical field
The present invention relates to a kind of electro spindle rotor angular contact ball bearing pretightening force controlling mechanism, more particularly to it is a kind of from
Dynamic, new, accurate, dynamical feedback pretightening force controlling mechanism.
Background technology
Electro spindle is the new technology that machine tool chief axis and spindle motor combine together occurred in digit ctrol machine tool field.At a high speed
Digit Control Machine Tool main transmission eliminates belt wheel transmission and gear drive.Machine tool chief axis is directly driven by built-in motor, from
And be zero the contraction in length of Machine Tool Main Drive chain, realize " Zero-drive Chain " of lathe.Electro spindle has compact-sized, weight
Gently, the advantages that inertia is small, noise is low, response is fast, and rotating speed is high, power is big, simplifies Machine Tool design, it is easy to accomplish main shaft is fixed
Position, is a kind of ideal structure in High-sp eed spindle unit.Electro spindle under different operating modes, for temperature rise and support stiffness will
Ask the emphasis of degree different, it is therefore desirable to which different bearing pre-fastenings are adapted therewith.Appropriate bearing pre-fastening can have
The control temperature rise of effect, improve the life-span of bearing and reduce noise.Research shows, as bearing pre-fastening increases, the support of bearing
Precision, running accuracy all increase, but temperature rise can also increase, and too high temperature can burn bearing, kill rolling element, can be big
The big service life for reducing bearing；As bearing pre-fastening reduces, temperature rise decreases, but the support accuracy of bearing, rotation
Precision can also reduce, and influence crudy.Therefore, be directed to different operating modes, the pretightning force of bearing have an optimum value with
It is corresponding.Because when electro spindle works, what its rotating speed and load often changed, to have to running accuracy, noise, temperature rise etc. strictly
The electro spindle asked, bearing prefastening load is not only controlled in first installation, and be also required to adjust in use.But at present
The pretightning force of electro spindle be all uncontrollable in use, in order to ensure that electro spindle can constantly adjust its axle at work
Pretightning force is held, there is higher reliability under high low speed, weight load, the present invention devises electric mainshaft bearing pretightning force for this
Automatic adjusting mechanism.
The content of the invention
It is an object of the invention to provide a kind of new practical, automatic, accurate, dynamical feedback electro spindle rotor bearing
Pretightening force controlling mechanism.The pretightning force that the mechanism passes through good automatic adjustment technology, effectively regulation electric mainshaft bearing.Specific skill
Art scheme is as follows：
A kind of electro spindle angular contact ball bearing pretightening force controlling mechanism, including oil scraper ring, angular contact ball bearing, three layers of sleeve
(steel bushing, endoporus nickel-plated aluminium alloy sleeve and annular stack are followed successively by by internal layer to outer layer and laminate electroceramics sleeve), main shaft, oil spout
Mouth, circlip for hole, non-contact temperature sensor, stator coil, mover coil, soket head cap screw, oil connect nozzle, piezoelectricity pottery
Porcelain driving power, end cap, angular acceleration vibrating sensor, connector, electro spindle housing and water connect nozzle；
The mover coil is socketed on main shaft, and stator coil is arranged in electro spindle housing, and the main shaft is arranged on institute
State in electro spindle housing, air gap is provided between the mover coil and stator coil；
The oil scraper ring is socketed in the both ends of mover coil on main shaft；
The both ends of the main shaft are respectively equipped with a pair of angular contact ball bearings；
The each pair angular contact ball bearing uses back-to-back installation；
Three layers of sleeve are provided between each pair angular contact ball bearing；
Circlip for hole is provided with the outside of the angular contact ball bearing, and props up the outer ring of bearing；
Atomizer is provided with the electro spindle housing；
The non-contact temperature sensor is arranged between angular contact ball bearing and oil scraper ring；
The end cap is fixed on electro spindle housing by soket head cap screw；
The angular acceleration vibrating sensor is connected and is arranged on end cap with main shaft end；
The oil connects nozzle, drive power supply for piezoelectric ceramics, connector, water and connects nozzle on end cap；
The oil connects nozzle and is connected with atomizer by electro spindle housing inner tube road；
The water connects nozzle and is connected with the pipeline in electro spindle housing；
The drive power supply for piezoelectric ceramics laminates electroceramics sleeve with annular stack by circuit and is connected.
A kind of described electro spindle angular contact ball bearing pretightening force controlling mechanism, its preferred scheme are three layers of sleeve point
Not Wei annular stack laminate electroceramics sleeve, aluminium alloy sleeve barrel and steel bushing；
The steel bushing is arranged on inner side, and aluminium alloy sleeve barrel is arranged on centre, and annular stack laminates electroceramics sleeve and is arranged on
Outside；
The aluminium alloy sleeve barrel endoporus nickel plating.
A kind of described electro spindle angular contact ball bearing pretightening force controlling mechanism, its preferred scheme are the angular contact ball axle
Bearing outer-ring is made of memory alloy material.
A kind of described electro spindle angular contact ball bearing pretightening force controlling mechanism, its preferred scheme are used for three layers of sleeve
In regulation bearing pre-fastening, pass through elongating or shortening for sleeve so that the outside deformation of angular contact ball bearing outer ring inwardly recovers；
The deformation of steel bushing and aluminium alloy sleeve barrel is adjusted using the method for material heat expansion；Annular stack laminates the shape of electroceramics sleeve
Accommodation power supply of overdriving is adjusted according to two kinds of signals that non-contact temperature sensor and angular acceleration vibrating sensor gather
Section, the regulation combined to the steel bushing with aluminium alloy sleeve barrel are supplemented and corrected.
Totally two diagonal contact ball bearing, each pair Bearing configuration are two back-to-back installations of angular contact ball bearing, due to axially,
Radial load is all present, and this structure favorably improves main axis stiffness, using superfinishing level of confidentiality angular contact ball bearing, is advantageous to carry
The high speed of mainshaft.Bearing outer ring is made using memory alloy material, and after external force cancels, bearing outer ring can restPose.
The moment of friction of electro spindle temperature rise is caused, first, electro spindle rotating speed raises, to make to act on bearing ball essentially from two aspects
On centrifugal force and gyroscopic couple increase, increase moment of friction；Second, temperature rise expands bearing, so as to increase pretension
Power, increase moment of friction.If bearing temperature rise is excessive, it is necessary to when reducing temperature rise (needing less bearing pre-fastening), into
To using steel and aluminum combined sleeve among the bearing that uses, the material and length of two sleeves are different, utilize its coefficient of thermal expansion
Different and caused deformation is poor, pretightning force suffered by reduction bearing, reduces moment of friction, temperature just gradually lowers.Piezoelectricity is made pottery
Supplement and amendment of the insulator cylinder regulation as the regulation of steel and aluminum combined sleeve, install non-contact temperature sensor and angle on rotor
Acceleration vibrating sensor, annular stack laminates electroceramics sleeve according to temperature and the change of vibration, because inverse piezoelectric effect can
Corresponding deformation is produced, housing washer makes outer ring produce axial deformation, to change pretightning force suffered by bearing.Subtract when temperature is high
Small pretightning force, increases pretightning force when vibrating big.Mechanism can also be extended to fault pre-alarming function, when temperature or abnormal vibration,
The signal lamp being connected with temperature sensor and vibrating sensor will light and send alarm.
According to analysis, the bush material that the mechanism selects is steel and aluminium alloy, and the thermal coefficient of expansion of aluminium alloy is the 2 of steel
Times, the requirement of above-mentioned elongation can be met and economic performance is good.To increase the case hardness and wearability of aluminum alloy sleeve endoporus,
In its endoporus nickel plating.The collocation of this bush material, coefficient of thermal expansion difference is larger, but the coefficient of thermal expansion of homogenous material again will not mistake
Greatly, in order to avoid after temperature rise, sleeve elongation is excessive, causes prefastening load too small, triggers main axis stiffness, running accuracy therefrom
Reducing, vibration increase, steel ball produces serious skidding with raceway groove, so as to cause Bearing inner moment of friction to increase rapidly,
There are the failure modes such as heat occlusion and burn immediately in bearing.And the collocation hardness of this bush material is appropriate, cheap.Set
Cylinder cooperation position contributes to aluminium alloy sleeve barrel in inner side, aluminium alloy sleeve barrel using steel bushing in lateral approach, this fit system
Adjust the deformation of bearing outer ring.It is because it has small volume, displacement resolution from annular multilayer lamination structure piezoelectric ceramics
The advantages that high, fast response time, low voltage drive, High power output, this pretightening force controlling mechanism need have larger stroke,
The big stroke feature that annular stack laminates electroceramics sleeve is just especially suitable for the present invention.
This method advanced technology, processing technology is simple, and the electro spindle pretightning force self-adjusting system that the present invention designs is a kind of
Improve the speed of mainshaft effective and simple in construction method, solve high-speed electric main shaft in different operating mode lower bearing pretensions
The problem of power can not adjust.
A kind of operation principle of electro spindle angular contact ball bearing pretightening force controlling mechanism is as follows：
Regulation of the mechanism to bearing pre-fastening is divided into two aspects：First, steel bushing and endoporus nickel-plated aluminium alloy sleeve group
Close the regulation to bearing pre-fastening：Electro spindle run original state, bearing be in initial prefastening load effect under, when with turn
Speed rise, temperature rise, sleeve elongation, are all steel bushings to it but before steel bushing, endoporus nickel-plated aluminium alloy sleeve are isometric
Apply prefastening load, i.e., when isometric, prefastening load does not change (steel bushing and spindle material coefficient of thermal expansion are of substantially equal) yet.
When temperature continues to raise, endoporus nickel-plated aluminium alloy length sleeve is more than steel bushing, and (coefficient of thermal expansion of aluminium alloy sleeve barrel is probably steel
2 times of sleeve), prefastening load is applied to bearing by endoporus nickel-plated aluminium alloy sleeve, endoporus nickel-plated aluminium alloy sleeve is more than steel bushing
The length of growth, bearing internal external circle is set to produce additional displacement, prefastening load accordingly reduces, so that moment of friction reduces, temperature
Just gradually lower.After steel bushing and endoporus nickel-plated aluminium alloy sleeve and atomizer cool to bearing, steel bushing and endoporus
The length of nickel-plated aluminium alloy sleeve also can corresponding shortening therewith.Because bearing outer ring is made up of memory alloy material, work as set
Cylinder becomes in short-term, and the power that sleeve is applied to bearing outer ring can also reduce, deformation when bearing outer ring can restPose, so as to
Adjust the pretightning force of bearing.Bearing temperature is dynamic change, and the length of corresponding steel bushing and aluminium alloy sleeve barrel is also
Dynamic change.2nd, annular stack laminates supplement and amendment of the electroceramics sleeve regulation as the regulation of steel and aluminum combined sleeve, in rotor
Upper installation non-contact temperature sensor and angular acceleration vibrating sensor, annular stack laminate electroceramics sleeve according to temperature and shaken
Dynamic change, because inverse piezoelectric effect can produce corresponding deformation, housing washer makes outer ring produce axial deformation, to change
Become pretightning force suffered by bearing.(need to reduce pretightning force) when temperature is high, now non-contact temperature sensor can detect
The change of temperature, signal is passed into drive power supply for piezoelectric ceramics, drive power supply for piezoelectric ceramics can laminate electroceramics to annular stack
Sleeve conveys positive charge, annular stack is laminated the elongation of electroceramics sleeve, thus reduces bearing pre-fastening, controls temperature rise；Work as vibration
(need to increase pretightning force) when big, now angular acceleration vibrating sensor can detect the change of vibration, and signal is passed to
Drive power supply for piezoelectric ceramics, drive power supply for piezoelectric ceramics can laminate electroceramics sleeve conveying negative electrical charge to annular stack, make annular stack
Laminate electroceramics sleeve shortening because bearing outer ring is made up of memory alloy material, when sleeve become in short-term, sleeve to bearing outside
The applied power of circle can also reduce, and deformation when bearing outer ring can restPose, thus increase bearing pre-fastening, make vibration
Reduce.Control device in drive power supply for piezoelectric ceramics can be according to non-contact temperature sensor and angular acceleration vibrating sensor
Two kinds of detected signals, make comprehensive analysis, reasonably control the exported quantity of electric charge, make electro spindle in different operating modes
Under have suitable bearing pre-fastening.
Beneficial effects of the present invention：The mechanism of the invention automatically adjusts pretightning force technology by good, effectively regulation electricity
The support accuracy of main shaft temperature rise and bearing, running accuracy, improve bearing life, reduce noise, so as to improve the dynamic of electro spindle
Performance, improve the machining accuracy and processing efficiency of the lathe with spindle motor unit；Ensure that electro spindle can be in high low speed or weight
There is higher reliability under load：Under high-speed condition, i.e., moment of friction is larger, and in the case that temperature is higher, the mechanism provides
Lighter pretension, vibration and the noise of support system can be reduced, improve running accuracy.Under middling speed or low-speed conditions, that is, rub
Torque is smaller, in the case that temperature is relatively low, there is provided moderate pretension or severe pretension, improves support stiffness；Under the conditions of underloading, because
Small for external applied load, so electro spindle is with small vibration, now electro spindle temperature rise is subject matter, and the mechanism provides in this case
Lighter bearing pre-fastening, reduce temperature rise.Under fully loaded transportation condition, because external applied load is larger, the vibration of electro spindle is larger, this
When electro spindle support stiffness be subject matter, the mechanism provides larger bearing pre-fastening in this case, to improve bearing
Support accuracy and running accuracy, ensure to apply the crudy of spindle motor unit lathe.
Brief description of the drawings
Fig. 1 is a kind of electro spindle angular contact ball bearing pretightening force controlling mechanism structural representation.
In figure, 1 is oil scraper ring, and 2 be angular contact ball bearing, and 3 be that annular stack laminates electroceramics sleeve；4 be aluminium alloy sleeve barrel,
5 be steel bushing, and 6 be electro spindle, and 7 be atomizer, and 8 be circlip for hole, and 9 be non-contact temperature sensor, and 10 be stator
Coil, 11 be mover coil, and 12 be soket head cap screw, and 13 be that oil connects nozzle, and 14 be drive power supply for piezoelectric ceramics, and 15 be end cap, 16
It is connector for angular acceleration vibrating sensor, 17,18 be electro spindle housing, and 19 be that water connects nozzle.
Embodiment
A kind of electro spindle angular contact ball bearing pretightening force controlling mechanism as shown in Figure 1, including oil scraper ring 1, angular contact ball axle
Hold 2, three layers of sleeve, main shaft 6, atomizer 7, circlip for hole 8, non-contact temperature sensor 9, stator coil 10, mover
Coil 11, soket head cap screw 12, oil connect nozzle 13, drive power supply for piezoelectric ceramics 14, end cap 15, angular acceleration vibrating sensor 16,
Connector 17, electro spindle housing 18 and water connect nozzle 19；
The mover coil 11 is socketed on main shaft 6, and stator coil 10 is arranged in electro spindle housing 18, and the main shaft is set
Put in the electro spindle housing 18, air gap is provided between the mover coil 11 and stator coil 10；
The oil scraper ring 1 is socketed in the both ends of mover coil 11 on main shaft 6；
The both ends of the main shaft 6 are respectively equipped with a pair of angular contact ball bearings 2；
The each pair angular contact ball bearing 2 uses back-to-back installation；
Three layers of sleeve are provided between each pair angular contact ball bearing 2；
The outside of angular contact ball bearing 20 is provided with circlip for hole 8, and props up the outer ring of bearing；
Atomizer 7 is provided with the electro spindle housing 18；
The non-contact temperature sensor 9 is arranged between angular contact ball bearing 2 and oil scraper ring 1；
The end cap 15 is fixed on electro spindle housing 18 by soket head cap screw 12；
The angular acceleration vibrating sensor 16 is connected and is arranged on end cap 15 with the end of main shaft 6；
The oil connects nozzle 13, drive power supply for piezoelectric ceramics 14, connector 17, water and connects nozzle 19 on end cap 15；
The oil connects nozzle 19 and is connected with atomizer 7 by pipeline in electro spindle housing 18；
The water connects nozzle 19 and is connected with the pipeline in electro spindle housing 18；
The drive power supply for piezoelectric ceramics 14 laminates electroceramics sleeve 3 with annular stack by circuit and is connected.
Three layers of sleeve is respectively that annular stack laminates electroceramics sleeve 3, aluminium alloy sleeve barrel 4 and steel bushing 5；
The steel bushing 5 is arranged on inner side, and aluminium alloy sleeve barrel 4 is arranged on centre, and annular stack laminates electroceramics sleeve 3 and set
In outside；
The endoporus nickel plating of aluminium alloy sleeve barrel 4.
The outer ring of angular contact ball bearing 2 is made of memory alloy material.
Three layers of sleeve be used for adjust bearing pre-fastening, by elongating or shortening so that the outer ring of angular contact ball bearing 2 to
Outer deformation inwardly recovers；The deformation of steel bushing 5 and aluminium alloy sleeve barrel 4 is adjusted using the method for material heat expansion；Annular
The deformation for stacking piezoelectric ceramics sleeve 3 passes through piezoelectric ceramics foundation non-contact temperature sensor 9 and angular acceleration vibrating sensing
Two kinds of signal driving powers that device 16 gathers are adjusted, and the steel bushing 5 is mended with the regulation that aluminium alloy sleeve barrel 4 combines
Fill and correct.
According to structural analysis above, steel bushing 5 is different with the length of aluminium alloy sleeve barrel 4.The coefficient of thermal expansion phase of two kinds of materials
Difference is bigger, and longer during the big sleeve normal temperature of expansion rate, so could be in low temperature, and only long sleeve can be promoted outside bearing
Outside deformation is enclosed, prefastening load is applied to bearing.As rotating speed increases, temperature rise, two sleeves are made to produce thermal expansion, axially
Size increases, and when reaching certain temperature, aluminium alloy sleeve barrel 4 exceeds the length of long steel bushing 5 because coefficient of thermal expansion is larger after elongation
Degree, so as to the outside deformation of housing washer, bearing internal external circle is set to produce certain displacement so that the relative gap increase of ball,
So as to reduce prefastening load, such bearing frictional torque reduces, and caloric value is reduced, and temperature can reduce.Annular stack laminates electric pottery
Supplement and amendment of the regulation of insulator cylinder 3 as the regulation of steel and aluminum combined sleeve, install the He of non-contact temperature sensor 9 on rotor
Angular acceleration vibrating sensor 16, annular stack laminates electroceramics sleeve 3 according to temperature and the change of vibration, due to inverse piezoelectric effect
Corresponding deformation can be produced, housing washer makes outer ring produce axial deformation, to change pretightning force suffered by bearing.Temperature is high
When reduce pretightning force, increase pretightning force when vibrating big.
A kind of operation principle of electro spindle angular contact ball bearing pretightening force controlling mechanism is as follows：
Regulation of the mechanism to bearing pre-fastening is divided into two aspects：First, steel bushing 5 and endoporus nickel-plated aluminium alloy sleeve 4
Combine the regulation to bearing pre-fastening：Electro spindle 6 run original state, bearing be in initial prefastening load act under, when with
Rotating speed rise, temperature rises, sleeve elongation, but is all steel bushing before steel bushing 5, endoporus nickel-plated aluminium alloy sleeve 4 are isometric
Cylinder 5 applies prefastening load to it, i.e., when isometric, prefastening load does not change (steel bushing 5 and spindle material coefficient of thermal expansion base yet
This is equal).When temperature continues to raise, the length of endoporus nickel-plated aluminium alloy sleeve 4 is more than the (thermal expansion of aluminium alloy sleeve barrel of steel bushing 5
Rate is probably 2 times of steel bushing), prefastening load, endoporus nickel-plated aluminium alloy sleeve are applied to bearing by endoporus nickel-plated aluminium alloy sleeve 5
4, than the length that steel bushing more than 5 increases, make bearing internal external circle produce additional displacement, prefastening load accordingly reduces, so that frictional force
Square reduces, and temperature just gradually lowers.It is cooled to bearing in steel bushing 5 and endoporus nickel-plated aluminium alloy sleeve 4 and atomizer 7
Afterwards, the length of steel bushing 5 and endoporus nickel-plated aluminium alloy sleeve 4 also can corresponding shortening therewith.Because bearing outer ring is by remembering
Alloy material is made, and when sleeve becomes in short-term, the power that sleeve is applied to bearing outer ring can also reduce, and bearing outer ring can recover initial
Deformation during state, so as to adjust the pretightning force of bearing.Bearing temperature is dynamic change, corresponding steel bushing 5 and aluminium
The length of alloy sleeve 4 is also dynamic change.2nd, annular stack laminates the regulation of electroceramics sleeve 3 and adjusted as steel and aluminum combined sleeve
The supplement of section and amendment, install non-contact temperature sensor 9 and angular acceleration vibrating sensor 16 on rotor, and annular stacks
Piezoelectric ceramics sleeve 3, because inverse piezoelectric effect can produce corresponding deformation, is promoted outside bearing according to temperature and the change of vibration
Circle makes outer ring produce axial deformation, to change pretightning force suffered by bearing.(need to reduce pretightning force) when temperature is high, it is now non-
Contact type temperature sensor 9 can detect the change of temperature, signal be passed into drive power supply for piezoelectric ceramics 14, piezoelectric ceramics drives
Dynamic power supply 14 can laminate electroceramics sleeve 3 to annular stack and convey positive charge, annular stack is laminated electroceramics sleeve 3 and extend, thus
Bearing pre-fastening is reduced, controls temperature rise；(need to increase pretightning force) when vibrating big, now angular acceleration vibrating sensor 16
The change of vibration can be detected, signal is passed into drive power supply for piezoelectric ceramics 14, drive power supply for piezoelectric ceramics 14 can be to annular
Stack piezoelectric ceramics sleeve 3 and convey negative electrical charge, annular stack is laminated electroceramics sleeve 3 and shorten, because bearing outer ring is by remembering
Alloy material is made, and when sleeve becomes in short-term, the power that sleeve is applied to bearing outer ring can also reduce, and bearing outer ring can recover initial
Deformation during state, thus increases bearing pre-fastening, reduces vibration.Control device in drive power supply for piezoelectric ceramics 14 can root
According to two kinds of signals detected by non-contact temperature sensor 9 and angular acceleration vibrating sensor 16, comprehensive analysis is made, is closed
Reason ground controls the exported quantity of electric charge, electro spindle 6 is had suitable bearing pre-fastening under different operating modes.
Claims (4)
- A kind of 1. electro spindle angular contact ball bearing pretightening force controlling mechanism, it is characterised in that：Including oil scraper ring, angular contact ball axle Hold, annular stack laminates electroceramics sleeve, aluminium alloy sleeve barrel and steel bushing, main shaft, atomizer, circlip for hole, contactless Temperature sensor, stator coil, mover coil, soket head cap screw, oil connect nozzle, drive power supply for piezoelectric ceramics, end cap, angular acceleration Vibrating sensor, connector, electro spindle housing and water connect nozzle；The mover coil is socketed on main shaft, and stator coil is arranged in electro spindle housing, and the main shaft is arranged on the electricity In main shaft housing, air gap is provided between the mover coil and stator coil；The oil scraper ring is socketed in the both ends of mover coil on main shaft；The both ends of the main shaft are respectively equipped with a pair of angular contact ball bearings；The each pair angular contact ball bearing uses back-to-back installation；Three layers of sleeve are provided between each pair angular contact ball bearing；Circlip for hole is provided with the outside of the angular contact ball bearing, and props up the outer ring of bearing；Atomizer is provided with the electro spindle housing；The non-contact temperature sensor is arranged between angular contact ball bearing and oil scraper ring；The end cap is fixed on electro spindle housing by soket head cap screw；The angular acceleration vibrating sensor is connected and is arranged on end cap with main shaft end；The oil connects nozzle, drive power supply for piezoelectric ceramics, connector, water and connects nozzle on end cap；The oil connects nozzle and is connected with atomizer by electro spindle housing inner tube road；The water connects nozzle and is connected with the pipeline in electro spindle housing；The drive power supply for piezoelectric ceramics laminates electroceramics sleeve with annular stack by circuit and is connected.
- A kind of 2. electro spindle angular contact ball bearing pretightening force controlling mechanism as claimed in claim 1, it is characterised in that：Described three Layer sleeve is respectively that annular stack laminates electroceramics sleeve, aluminium alloy sleeve barrel and steel bushing；The steel bushing is arranged on inner side, and aluminium alloy sleeve barrel is arranged on centre, and annular stack laminates electroceramics sleeve and is arranged on outside；The aluminium alloy sleeve barrel endoporus nickel plating.
- A kind of 3. electro spindle angular contact ball bearing pretightening force controlling mechanism as claimed in claim 1, it is characterised in that：The angle Contact ball bearing outer ring is made of memory alloy material.
- A kind of 4. electro spindle angular contact ball bearing pretightening force controlling mechanism as claimed in claim 1, it is characterised in that：Described three Layer sleeve is used to adjust bearing pre-fastening, by elongating or shortening so that the outside deformation of angular contact ball bearing outer ring is inwardly extensive It is multiple；The deformation of steel bushing and aluminium alloy sleeve barrel is adjusted using the method for material heat expansion；Annular stack laminates electroceramics sleeve Deformation entered by driving power according to two kinds of signals that non-contact temperature sensor and angular acceleration vibrating sensor gather Row regulation, the regulation combined to the steel bushing with aluminium alloy sleeve barrel are supplemented and corrected.
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| CN201710705764.4A CN107344245B (en) | 2017-08-17 | 2017-08-17 | Electric spindle angular contact ball bearing pretightening force adjusting mechanism |
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| CN201710705764.4A CN107344245B (en) | 2017-08-17 | 2017-08-17 | Electric spindle angular contact ball bearing pretightening force adjusting mechanism |
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| CN107344245B CN107344245B (en) | 2023-04-25 |
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| CN108161036A (en) * | 2018-03-14 | 2018-06-15 | 沈阳建筑大学 | A kind of machining center ultrasonic wave electro spindle for having self-adjustable bearing pretightning force |
| CN108247535A (en) * | 2018-03-14 | 2018-07-06 | 沈阳建筑大学 | A kind of numerically control grinder electro spindle for having self-adjustable bearing pretightning force |
| CN111273605A (en) * | 2020-03-04 | 2020-06-12 | 上海交通大学 | Intelligent electric spindle system of numerical control machine tool |
| CN112059213A (en) * | 2020-08-31 | 2020-12-11 | 沈阳建筑大学 | Method and system for intelligently adjusting bearing pre-tightening force of electric spindle |
| CN112665768A (en) * | 2020-12-25 | 2021-04-16 | 中国船舶重工集团公司第七0三研究所 | Angular contact ball bearing pretightening force testing device and reasonable value measuring method |
| CN113916411A (en) * | 2021-09-18 | 2022-01-11 | 哈尔滨工业大学 | Pre-tightening force measurement method based on global linearization Koopman state observer |
| CN116839906A (en) * | 2023-09-04 | 2023-10-03 | 吉林大学 | Device and method for testing reliability of lubricating grease of electric spindle bearing of analog numerical control machine tool |
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| CN108161036A (en) * | 2018-03-14 | 2018-06-15 | 沈阳建筑大学 | A kind of machining center ultrasonic wave electro spindle for having self-adjustable bearing pretightning force |
| CN108247535A (en) * | 2018-03-14 | 2018-07-06 | 沈阳建筑大学 | A kind of numerically control grinder electro spindle for having self-adjustable bearing pretightning force |
| CN108161036B (en) * | 2018-03-14 | 2023-06-06 | 沈阳建筑大学 | Machining center ultrasonic electric spindle with automatic bearing pretightening force adjustment function |
| CN111273605A (en) * | 2020-03-04 | 2020-06-12 | 上海交通大学 | Intelligent electric spindle system of numerical control machine tool |
| CN111273605B (en) * | 2020-03-04 | 2022-01-04 | 上海交通大学 | Intelligent electric spindle system of numerical control machine tool |
| CN112059213A (en) * | 2020-08-31 | 2020-12-11 | 沈阳建筑大学 | Method and system for intelligently adjusting bearing pre-tightening force of electric spindle |
| CN112059213B (en) * | 2020-08-31 | 2022-01-11 | 沈阳建筑大学 | Method and system for intelligently adjusting bearing pre-tightening force of main shaft |
| CN112665768A (en) * | 2020-12-25 | 2021-04-16 | 中国船舶重工集团公司第七0三研究所 | Angular contact ball bearing pretightening force testing device and reasonable value measuring method |
| CN113916411A (en) * | 2021-09-18 | 2022-01-11 | 哈尔滨工业大学 | Pre-tightening force measurement method based on global linearization Koopman state observer |
| CN113916411B (en) * | 2021-09-18 | 2022-05-27 | 哈尔滨工业大学 | Pre-tightening force measurement method based on global linearization Koopman state observer |
| CN116839906A (en) * | 2023-09-04 | 2023-10-03 | 吉林大学 | Device and method for testing reliability of lubricating grease of electric spindle bearing of analog numerical control machine tool |
| CN116839906B (en) * | 2023-09-04 | 2023-11-07 | 吉林大学 | Device and method for testing reliability of lubricating grease of electric spindle bearing of analog numerical control machine tool |
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