CN106425635A - Electric main shaft based on dynamic-pressure sliding bearings - Google Patents
Electric main shaft based on dynamic-pressure sliding bearings Download PDFInfo
- Publication number
- CN106425635A CN106425635A CN201611175667.0A CN201611175667A CN106425635A CN 106425635 A CN106425635 A CN 106425635A CN 201611175667 A CN201611175667 A CN 201611175667A CN 106425635 A CN106425635 A CN 106425635A
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- CN
- China
- Prior art keywords
- main shaft
- sliding bearing
- electro spindle
- hydrodynamic sliding
- bearing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/02—Driving main working members
- B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
- B23Q5/043—Accessories for spindle drives
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/167—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
- H02K5/1672—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings radially supporting the rotary shaft at both ends of the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Turning (AREA)
Abstract
The invention discloses an electric main shaft based on dynamic-pressure sliding bearings. The electric main shaft comprises an electric main shaft shell, a main shaft, a motor and a lubricating and cooling system, wherein a front liquid dynamic-pressure sliding bearing and a back liquid dynamic-pressure sliding bearing are arranged at the front part and back end of the main shaft respectively; a rotor of the motor is fixedly connected with the main shaft and drives the main shaft to rotate; the lubricating and cooling system comprises a front nozzle, a back nozzle and a cooling jacket; the front nozzle communicates with the front liquid dynamic-pressure sliding bearing and penetrates through the electric main shaft shell; the back nozzle communicates with the back liquid dynamic-pressure sliding bearing and penetrates through electric main shaft shell; and the cooling jacket is provided with a cooling oil passage, and a cooling oil inlet and a cooling oil outlet which communicate with the cooling oil passage. The invention breaks through a traditional electric main shaft design concept based on a rolling bearing, and provides the electric main shaft based on the dynamic-pressure sliding bearings, and the electric main shaft based on the dynamic-pressure sliding bearings can bear a higher rotating speed, so that the service life can be effectively prolonged; and the electric main shaft based on the dynamic-pressure sliding bearings can bear a greater load, thereby having the characteristics of high carrying capacity, high precision, compact structure and long service life.
Description
Technical field
The present invention relates to a kind of electro spindle based on hydrodynamic sliding bearing, belongs to electro spindle technical field.
Background technology
Electro spindle is a kind of integral unit that high-speed electric expreess locomotive is built in main shaft.The rotor of motor drives main shaft to revolve together
Turn, it is achieved that electromechanical integration.The common machinery of this cancellation V belt translation and gear drive etc., realizes lathe " Zero-drive Chain "
The gear unit of structure is applied more and more extensively in modern machine design, and its compact conformation, rotating speed are high, quality is little, start and stop are fast
Speed, the stable feature that operates make the first-selected structure of high-speed main spindle.And traditional electro spindle is based primarily upon rolling bearing
Design concept, limits the raising further of its rotating speed, and bearing capacity is also limited.
Content of the invention
The technical problem to be solved is：Overcome the deficiencies in the prior art, a kind of load capacity height, precision are provided
Height, compact conformation, the electro spindle based on hydrodynamic sliding bearing of life-span length.
In order to solve above-mentioned technical problem, the technical scheme is that：A kind of electro spindle based on hydrodynamic sliding bearing,
Including electro spindle shell, main shaft, motor, lubrication and cooling system, the front portion of main shaft and rear end are separately installed with front liquid and move
Pressure sliding bearing and rear Hydrodynamic Sliding Bearing, forward and backward Hydrodynamic Sliding Bearing and electro spindle shell, is located at outside electro spindle
The bearing (ball) cover at shell two ends collectively forms overall annular seal space, and motor is dynamic installed in front Hydrodynamic Sliding Bearing and rear liquid
Between pressure sliding bearing, the motor rotor is fixedly connected with main shaft and drives main shaft to rotate, and the motor stator is located at
On the outside of motor rotor, lubrication and cooling system include front nozzle, rear nozzle and coolant jacket, and front nozzle is slided with front Hydrodynamic
Bearing connects and runs through electro spindle shell, and rear nozzle connects and run through electro spindle shell with rear Hydrodynamic Sliding Bearing, described
Cooling is set between motor stator and electro spindle shell, and coolant jacket is provided with cooling oil passage and is connected with cooling oil passage
Logical cooling oil-in and cooling-oil outlet, cooling oil-in and cooling-oil outlet run through electro spindle shell.
Axially support further for providing, the rear and front end of the main shaft respectively arranges an angular contact ball bearing, respectively
Front angular contact ball bearing and rear angular contact ball bearing, forward and backward angular contact ball bearing is located at the forward and backward Hydrodynamic of above-mentioned sealing intracavity
The outside of sliding bearing, to provide axial supporting, prevents the axial movement of electro spindle.
Further, the angular contact ball bearing is ceramic angular contact ball bearing that contact angle is 25 °.
Positioning is provided further for motor, the both sides of the main shaft upper motor are also equipped with spacer and collar,
Spacer is used for the positioning of motor stator, and collar is used for the positioning of rotor.
Further, the inside of the main shaft is provided with disk spring formula pine tool-broaching mechanism, bears moment of torsion during for being driven.
Further, the bearing shell of the main shaft is made using axle casting aluminum-bronze material, to obtain enough tensile strength and punching
Hit toughness.
Further for less profile, higher efficiency is obtained, the motor adopts autosynchronous motor.
Technique scheme is employed, the present invention casts aside traditional electric spindle design theory based on rolling bearing, adopt
A kind of architectural schemes based on hydrodynamic sliding bearing, it is proposed that electro spindle based on hydrodynamic sliding bearing, with respect to rolling bearing
Electro spindle, the electro spindle based on hydrodynamic sliding bearing of the present invention can bear bigger rotating speed, make so as to effectively improve
With the life-span, while bigger load can also be born, have the characteristics that load capacity height, high precision, compact conformation, life-span length；This
Invention has rational lubrication and cooling system, is that the work of electro spindle provides a good working environment, can more great Cheng
The minimizing cost of degree, creates bigger profit；The present invention adds a pair of angular contact multiple-ceramic ball bearings to carry at main shaft two ends
For axial supporting, so that electro spindle can not only bear radial load, moreover it is possible to bear axial load, so as to bearing more
High rotating speed, is greatly enhanced the service life of electro spindle.
Description of the drawings
Fig. 1 is the front sectional view of the electro spindle based on hydrodynamic sliding bearing of the present invention；
Fig. 2 is the installation diagram of the electro spindle based on hydrodynamic sliding bearing of the present invention；
Fig. 3 is the structural representation of the main shaft of the present invention；
In figure, 1, main shaft, 2, lock-screw, 3, bearing (ball) cover, 4, lock-screw, 5, front angular contact ball bearing, 6, front liquid
Body hydrodynamic sliding bearing, 7, front nozzle, 8, spacer, 9, collar, 10, cooling oil-in, 11, electro spindle shell, 12, coolant jacket,
13rd, motor stator, 14, motor rotor, 15, cooling-oil outlet, 16, rear nozzle, 17, rear Hydrodynamic Sliding Bearing, 18,
Rear angular contact ball bearing.
Specific embodiment
In order that present disclosure is easier to be clearly understood, below according to specific embodiment and accompanying drawing is combined, right
The present invention is described in further detail.
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of electro spindle based on hydrodynamic sliding bearing, including electro spindle shell 11, main shaft
1st, motor, lubrication and cooling system, the front portion of main shaft 1 and rear end are separately installed with front Hydrodynamic Sliding Bearing 6 and rear liquid
Body hydrodynamic sliding bearing 17, forward and backward Hydrodynamic Sliding Bearing and electro spindle shell 11, is located at the axle at 11 two ends of electro spindle shell
Socket end lid 3 collectively forms overall annular seal space, and motor is installed in front Hydrodynamic Sliding Bearing 6 and rear Hydrodynamic sliding axle
Hold between 17, the motor rotor 14 is fixedly connected with main shaft 1 and drives main shaft 1 to rotate, and the motor stator 13 is located at
14 outside of motor rotor, lubrication and cooling system include front nozzle 7, rear nozzle 16 and coolant jacket 12, front nozzle 7 and front liquid
Hydrodynamic sliding bearing 6 is connected and through electro spindle shell 11, and rear nozzle 16 is connected with rear Hydrodynamic Sliding Bearing 17 and run through
Electro spindle shell 11, the coolant jacket 12 is arranged between motor stator 13 and electro spindle shell 11, and coolant jacket 12 is provided with
Cooling oil passage and the cooling oil-in 10 with cooling oil channel connection and cooling-oil outlet 15, cooling oil-in 10 and cooling oil
Outlet 15 runs through electro spindle shell 11.
Further, as shown in figure 1, bearing (ball) cover 3 is fixed on electro spindle shell 11 by trip bolt 4, bearing (ball) cover 3
To one positioning fixation of whole electric chief axis system, and provide the effect of sealing；Angular contact ball bearing 5 before the end of main shaft 1
Be further fixed on cushion block at rear angular contact ball bearing 18, and by lock-screw 2, cushion block is fixed, cushion block gives front angular contact ball axle
Hold the effect of 5 and 18 1 positioning of rear angular contact ball bearing.
Preferably, as shown in figure 1, the rear and front end of the main shaft 1 respectively arranges an angular contact ball bearing, respectively front corner connection
Tactile ball bearing 5 and rear angular contact ball bearing 18, forward and backward angular contact ball bearing is located at the forward and backward Hydrodynamic of above-mentioned sealing intracavity and slides
The outside of dynamic bearing, to provide axial supporting, prevents the axial movement of electro spindle.
Further, the angular contact ball bearing is ceramic angular contact ball bearing that contact angle is 25 °.
Preferably, as shown in figure 1, the both sides of 1 upper motor of the main shaft are also equipped with spacer 8 and collar 9, spacer 8 is used
In the positioning of motor stator 13, collar 9 is used for the positioning of rotor 14.
Alternatively, as shown in Figure 1, Figure 3, the main shaft 1 is hollow axle, and the inside of main shaft 1 is provided with disk spring formula pine
Tool-broaching mechanism, bears moment of torsion during for being driven.
Preferably, the bearing shell of the main shaft 1 is made using axle casting aluminum-bronze material, to obtain enough tensile strength and punching
Hit toughness.
Alternatively, the motor adopts autosynchronous motor.
The present invention casts aside traditional electric spindle design theory based on rolling bearing, using the frame based on hydrodynamic sliding bearing
A kind of structure scheme, it is proposed that electro spindle based on hydrodynamic sliding bearing, requires according to electric spindle design and ultimate principle is from structure
On each several part part of high-speed electric main shaft is designed, calculates and checks to determine relevant parameter；With respect to rolling bearing
Electro spindle, the electro spindle based on hydrodynamic sliding bearing of the present invention can bear bigger rotating speed, so as to effectively improve use
Life-span, while bigger load can also be born, have the characteristics that load capacity height, high precision, compact conformation, life-span length；This
Bright is that the work of electro spindle provides a good working environment with rational lubrication and cooling system, can be more
Minimizing cost, create bigger profit；The present invention adds a pair of angular contact multiple-ceramic ball bearings to provide at main shaft two ends
Axially support, so that electro spindle can not only bear radial load, moreover it is possible to bear axial load, higher so as to bearing
Rotating speed, be greatly enhanced the service life of electro spindle.
Particular embodiments described above, to present invention solves the technical problem that, technical scheme and beneficial effect carry out
Further describe, the specific embodiment that the foregoing is only the present invention is should be understood that, be not limited to this
Invention, all any modification, equivalent substitution and improvement that within the spirit and principles in the present invention, is done etc., should be included in this
Within bright protection domain.
Claims (7)
1. a kind of electro spindle based on hydrodynamic sliding bearing, it is characterised in that：Including electro spindle shell (11), main shaft (1), electronic
Machine, lubrication and cooling system, the front portion of main shaft (1) and rear end are separately installed with front Hydrodynamic Sliding Bearing (6) and rear liquid
Hydrodynamic sliding bearing (17), forward and backward Hydrodynamic Sliding Bearing and electro spindle shell (11), is located at electro spindle shell (11) two ends
Bearing (ball) cover (3) collectively form overall annular seal space, motor is moved installed in front Hydrodynamic Sliding Bearing (6) and rear liquid
Between pressure sliding bearing (17), motor rotor (14) are fixedly connected with main shaft (1) and drive main shaft (1) to rotate, described
Motor stator (13) be located at motor rotor (14) on the outside of, lubrication and cooling system include front nozzle (7), rear nozzle (16) and
Coolant jacket (12), front nozzle (7) is connected with front Hydrodynamic Sliding Bearing (6) and through electro spindle shell (11), rear nozzle
(16) connect with rear Hydrodynamic Sliding Bearing (17) and through electro spindle shell (11), coolant jacket (12) are arranged on electronic
Between machine stator (13) and electro spindle shell (11), coolant jacket (12) be provided with cooling oil passage and with cooling oil channel connection
Cooling oil-in (10) and cooling-oil outlet (15), cooling oil-in (10) and cooling-oil outlet (15) run through electro spindle shell
(11).
2. the electro spindle based on hydrodynamic sliding bearing according to claim 1, it is characterised in that：Before main shaft (1)
Two ends respectively arrange an angular contact ball bearing afterwards, and respectively front angular contact ball bearing (5) and rear angular contact ball bearing (18), forward and backward
Angular contact ball bearing is located at the outside of the forward and backward Hydrodynamic Sliding Bearing of above-mentioned sealing intracavity, to provide axial supporting, prevents electricity
The axial movement of main shaft.
3. the electro spindle based on hydrodynamic sliding bearing according to claim 2, it is characterised in that：The angular contact ball bearing
For the ceramic angular contact ball bearing that contact angle is 25 °.
4. the electro spindle based on hydrodynamic sliding bearing according to any one of claims 1 to 3, it is characterised in that：The master
The both sides of axle (1) upper motor are also equipped with spacer (8) and collar (9), and spacer (8) is used for the positioning of motor stator (13), axle
Ring (9) is used for the positioning of rotor (14).
5. the electro spindle based on hydrodynamic sliding bearing according to any one of claims 1 to 3, it is characterised in that：The master
Axle (1) is hollow axle, and the inside of main shaft (1) is provided with disk spring formula pine tool-broaching mechanism, bears moment of torsion during for being driven.
6. the electro spindle based on hydrodynamic sliding bearing according to any one of claims 1 to 3, it is characterised in that：The master
The bearing shell of axle (1) is made using axle casting aluminum-bronze material, to obtain enough tensile strength and impact toughness.
7. the electro spindle based on hydrodynamic sliding bearing according to any one of claims 1 to 3, it is characterised in that：The electricity
Motivation adopts autosynchronous motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611175667.0A CN106425635B (en) | 2016-12-15 | 2016-12-15 | Electro spindle based on hydrodynamic sliding bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611175667.0A CN106425635B (en) | 2016-12-15 | 2016-12-15 | Electro spindle based on hydrodynamic sliding bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106425635A true CN106425635A (en) | 2017-02-22 |
| CN106425635B CN106425635B (en) | 2018-04-06 |
Family
ID=58217468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611175667.0A Active CN106425635B (en) | 2016-12-15 | 2016-12-15 | Electro spindle based on hydrodynamic sliding bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106425635B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107276317A (en) * | 2017-06-16 | 2017-10-20 | 余雷 | A kind of internal rotor water-cooled machine |
| CN107994709A (en) * | 2018-01-17 | 2018-05-04 | 明程电机技术（深圳）有限公司 | Machine shaft and evaporation cooling shaft type oil-cooled motor |
| CN109238697A (en) * | 2018-08-16 | 2019-01-18 | 东南大学 | A kind of rotor-bearing system for high speed water lubrication hydrodynamic bearing performance test |
| CN109865848A (en) * | 2019-03-27 | 2019-06-11 | 宁波天控五轴数控技术有限公司 | A kind of electro spindle |
| CN111804936A (en) * | 2019-04-10 | 2020-10-23 | 宁波天控五轴数控技术有限公司 | Dual-cooling electric spindle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004009180A (en) * | 2002-06-05 | 2004-01-15 | Koyo Seiko Co Ltd | Built-in motor main spindle |
| CN2719455Y (en) * | 2004-09-03 | 2005-08-24 | 湖南同心科技有限公司 | High-speed electric main spindle of hydrostatic-hydrodynamic bearing |
| CN2765372Y (en) * | 2004-12-08 | 2006-03-15 | 湖南同心科技有限公司 | Dynamic/static pressure bearing electric main shaft |
| CN204234967U (en) * | 2014-10-09 | 2015-04-01 | 安阳工学院 | A kind of friction stir welding dynamic/static piezoelectric main shaft |
| CN206305855U (en) * | 2016-12-15 | 2017-07-07 | 常州机电职业技术学院 | Electro spindle based on hydrodynamic sliding bearing |
-
2016
- 2016-12-15 CN CN201611175667.0A patent/CN106425635B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004009180A (en) * | 2002-06-05 | 2004-01-15 | Koyo Seiko Co Ltd | Built-in motor main spindle |
| CN2719455Y (en) * | 2004-09-03 | 2005-08-24 | 湖南同心科技有限公司 | High-speed electric main spindle of hydrostatic-hydrodynamic bearing |
| CN2765372Y (en) * | 2004-12-08 | 2006-03-15 | 湖南同心科技有限公司 | Dynamic/static pressure bearing electric main shaft |
| CN204234967U (en) * | 2014-10-09 | 2015-04-01 | 安阳工学院 | A kind of friction stir welding dynamic/static piezoelectric main shaft |
| CN206305855U (en) * | 2016-12-15 | 2017-07-07 | 常州机电职业技术学院 | Electro spindle based on hydrodynamic sliding bearing |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107276317A (en) * | 2017-06-16 | 2017-10-20 | 余雷 | A kind of internal rotor water-cooled machine |
| CN107994709A (en) * | 2018-01-17 | 2018-05-04 | 明程电机技术（深圳）有限公司 | Machine shaft and evaporation cooling shaft type oil-cooled motor |
| CN109238697A (en) * | 2018-08-16 | 2019-01-18 | 东南大学 | A kind of rotor-bearing system for high speed water lubrication hydrodynamic bearing performance test |
| CN109865848A (en) * | 2019-03-27 | 2019-06-11 | 宁波天控五轴数控技术有限公司 | A kind of electro spindle |
| CN111804936A (en) * | 2019-04-10 | 2020-10-23 | 宁波天控五轴数控技术有限公司 | Dual-cooling electric spindle |
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| Publication number | Publication date |
|---|---|
| CN106425635B (en) | 2018-04-06 |
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