CN104942649B - Cooling structure inside and outside a kind of high-speed electric main shaft - Google Patents
Cooling structure inside and outside a kind of high-speed electric main shaft Download PDFInfo
- Publication number
- CN104942649B CN104942649B CN201510429443.7A CN201510429443A CN104942649B CN 104942649 B CN104942649 B CN 104942649B CN 201510429443 A CN201510429443 A CN 201510429443A CN 104942649 B CN104942649 B CN 104942649B
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- China
- Prior art keywords
- main shaft
- water
- cooling
- housing
- electro spindle
- 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.)
- Expired - Fee Related
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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
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/12—Arrangements for cooling or lubricating parts of the machine
- B23Q11/126—Arrangements for cooling or lubricating parts of the machine for cooling only
- B23Q11/127—Arrangements for cooling or lubricating parts of the machine for cooling only for cooling motors or spindles
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Auxiliary Devices For Machine Tools (AREA)
- Mounting Of Bearings Or Others (AREA)
Abstract
The present invention provides cooling structure inside and outside a kind of high-speed electric main shaft, cooling water channel is added on electro spindle housing and electro spindle front-end bearing pedestal, spiral cooling-water duct is provided with inside main shaft simultaneously, realize to efficiently being cooled down while electro spindle major heat producing components such as motor stator and rotor and front and back bearings, so as to be effectively controlled the temperature rise of electro spindle, the service life of motor and bearing is improved, while the machining accuracy of electro spindle and suface processing quality are greatly promoted due to the reduction of thermal deformation.
Description
Technical field
It is especially a kind of inside and outside while cool down electro spindle the present invention relates to cooling structure inside and outside a kind of high-speed electric main shaft
Cooling structure.
Background technology
The stator and rotor of motor are directly loadable into main shaft and are internally formed electromechanical integration by being mainly characterized by of high-speed electric main shaft
Electro spindle.So as to realize " Zero-drive Chain " of axis system, have that compact-sized, rotary inertia is small, start and stop speed
Hurry up, be easily achieved the advantages that stepless time adjustment and accurate control, still, the radiating of this structure of electro spindle to electro spindle be and its
Unfavorable.Built-in type electro spindle is mainly what is be made up of built-in type servomotor, front and rear spring bearing, main shaft and housing, wherein
Built-in type servomotor and forward and backward bearing are the main heat generating components of electro spindle.Temperature rise is a weight of electro spindle component capabilities
Index is wanted, ADGM electro spindles often work under larger load-up condition, and main shaft stator and rotor and front and rear spring bearing are in work
During can produce substantial amounts of heat, these heats can pass to the parts such as main shaft and housing, cause to produce during spindle processing
Raw displacement of the lines and angular displacement, influence machining accuracy and the crudy of piece surface.
Mainly as caused by the loss of motor and the friction of bearing, the loss 2/3 of wherein motor is the heat of electro spindle
As caused by stator, 1/3 is as caused by rotor.Traditional cooling means is that spiral is equipped between motor stator and housing
Cooling water channel, water annulus is added between front-end bearing pedestal and housing, is connected by the rear water-in and water-out joint that covers greatly, it is interior
Portion's cooling water takes away the heat of motor stator and fore bearing, plays the effect of cooling fore bearing and stator, still, accounts for motor production
The rotor of heat 1/3 and rear bearing are not cooled down effectively, so as to which electro spindle forms phenomenon cold outside and hot inside.And lead
Influence of the thermal expansion of axle for machining accuracy is fatal, if the diameter in the axle center of main shaft calculates according to 0.5m, root
Understood according to the thermal expansion of metal is theoretical, if the axle center temperature of main shaft often rises 1 DEG C, the length of main shaft will extend 0.005m, by
On the one hand this caused thermal deformation can have a strong impact on the machining accuracy and suface processing quality of electro spindle if dealing with improperly, separately
On the one hand because the temperature of the ratio inner ring of bearing outer ring is high, the pretension amount for causing bearing increases, and has been further exacerbated by bearing
Abrasion heating, influence the service life of bearing.There is a kind of axle center cooling means at present for this phenomenon：In the housing of electro spindle
Go out to be provided with cooling heat conducting pipe with axle center, although this cooling means can play cooling to electro spindle and make to a certain extent
With, but the cooling medium of this cooling means is not liquid but air, because the hot exchange power of air is limited, so this
Kind method effectively can not solve the heat dissipation problem under electro spindle works long hours.
The content of the invention
It is an object of the invention to solve the deficiencies in the prior art, by the present invention, before electro spindle housing and electro spindle
Cooling water channel is added on bearing block, while spiral cooling-water duct is provided with inside main shaft, realizes and electro spindle is mainly sent out
Efficiently cool down while thermal part such as motor stator and rotor and front and back bearings, so as to be effectively controlled the temperature rise of electro spindle, improve
The service life of motor and bearing, at the same the machining accuracy of electro spindle and suface processing quality due to thermal deformation reduction and significantly
Lifting.
The technical scheme is that including electro spindle housing, be fixed with front-end bearing pedestal and rear bearing block, front axle in housing
Between bearing and rear bearing block through fore bearing and after bearing be fixed with main shaft, rotor is set with main shaft, on rotor
It is cased with being fixed on the motor stator on housing, the housing is interior to be provided with multiple interconnected casing annular water around motor stator
Road, one end of the casing annular water channel connect the annular cooling water road set on front-end bearing pedestal outer diameter cylindrical, annular cooling water
Road is in communication with the outside through housing, and the main shaft offers the water flowing blind hole of the line centered on spindle axis, the main shaft from rear end
Inside offers the spiral water cooling water channel around the closing of water flowing blind hole, and spiral water cooling water channel is connected with water flowing blind hole,
Rear-end of spindle offers the outlet pass being connected with spiral water cooling water channel.
The stator inner water sleeve for closing casing annular water channel is provided between the housing and motor stator.
The ring-shaped water jacket for closed ring cooling water channel is provided between the front-end bearing pedestal and housing.
The outer cooling water outlet mouth joint that the casing annular water channel connection is placed on rear bearing block, the annular cooling water road
Connect the outer coolant intake joint being placed on rear bearing block.
It is equipped with the main shaft inner water sleeve for enclosing coil water cooling water channel in the water flowing blind hole of the main shaft, water in main shaft
Put provided with the limbers being connected with enclosing coil water cooling water channel.
The water flowing blind hole is communicated with the water inlet for the high-speed joint for being threadedly secured in rear-end of spindle, and rotation at a high speed connects
The delivery port connection outlet pass of head.
The invention has the advantages that can be simultaneously to the pyrotoxin of electro spindle：Electro spindle servomotor stator and rotor and electricity
The forward and backward bearing of main shaft is cooled down, so as to improve the service life of servomotor and bearing；Axle center cooling structure can also drop
Low electro spindle main shaft temperature rise, so as to effectively increase electro spindle machining accuracy and suface processing quality.
Brief description of the drawings
Fig. 1 is the structure diagram of high-speed electric main shaft of the present invention.
Fig. 2 is the three-dimensional simulation schematic diagram of cooling outside the present invention.
Fig. 3 is the three-dimensional simulation schematic diagram of internal cooling of the present invention.
Fig. 4 is the inside and outside three-dimensional simulation schematic diagram integrally cooled down of the present invention.
In Fig. 1：1 screw, 2 driving keys, 3 protecgulums, 4 screws, 5 housings, 6 closures, 7 fore bearings, 8 fore bearings
Seat, 9 holding screws, 10 balance rings, 11 rotors, 12 stators, 13 holding screws, 14 armature nuts, 15 O-ring seals,
16 main shaft inner water sleeves, 17 rear bearing blocks, 18 glands, 19 outer cooling water outlet mouth joints, 20 swivel joints, 21 code-disc bases
Bearing nut, 27 rear axles behind nut, 22 screws, 23 coding disks, 24 outer coolant intake joints, 25 code-disc bases, 26
Hold, end ring, 29 rotor inner sleeves, 30 stator inner water sleeves, 31 keys, 32 fore bearing nuts, 33 sealing rings, 34 O after 28
Type sealing ring, 35 main shafts.
In Fig. 2：19 outer cooling water outlet mouth joints, 24 outer coolant intake joints.
In Fig. 3：20 high-speed joints.
In Fig. 4：19 outer cooling water outlet mouth joints, 24 outer coolant intake joints, 20 swivel joints.
Embodiment
The embodiment of the present invention is described in further detail below in conjunction with accompanying drawing.
It can be seen from Fig. 1 to Fig. 4, cooling structure of the present invention is mainly concerned with：Screw 1, driving key 2, protecgulum
3rd, screw 4, housing 5, closure 6, fore bearing 7, front-end bearing pedestal 8, holding screw 9, balance ring 10, rotor 11, stator 12, tightening
Screw 13, armature nut 14, O-ring seal 15, main shaft inner water sleeve 16, rear bearing block 17, gland 18, cooling water outlet mouth joint
19th, swivel joint 20, code-disc base nut 21, screw 22, coding disk 23, coolant intake joint 24, code-disc base 25, rear axle
Hold nut 26, rear bearing 27, rear end ring 28, rotor inner sleeve 29, stator inner water sleeve 30, key 31, fore bearing nut 32, sealing
Circle 33, O-ring seal 34, main shaft 35.Wherein electro spindle fore bearing 7 is installed in front-end bearing pedestal 8, and tight with front-end bearing pedestal 8
Close fit, an annular cooling water road is processed on the outer diameter cylindrical face of front-end bearing pedestal 8.Watched in electro spindle housing 5 with built-in type
Take and add a stator inner water sleeve 30 between stator 12, the external diameter of stator inner water sleeve 30 fills with the minor diameter fit of electro spindle housing 5
Match somebody with somebody, the internal diameter of stator inner water sleeve 30 is assembled with the major diameter fit of built-in type servo motor stator 12, and a system is opened up on electro spindle housing 5
Row water annulus, these water annulus are communicated as one, the rear end of rear bearing block 17 offers entery and delivery port, on entery and delivery port
24,19 disengaging water swivels are installed, the duct of Cooling Water circulation is offered on rear bearing block 17 and electro spindle housing 5.Work
When cooling fluid through thermostat thermostatic control system, then enter from the water inlet of the rear end of rear bearing block 17, pass through
Limbers on electro spindle rear bearing block 17 and electro spindle housing 5 enters the annular cooling water road of front-end bearing pedestal 8, cools down front axle
7 are held, afterwards into the annular cooling water road on housing 5, by the annularly flow of multi-turn, electro spindle servo motor stator 12 is entered
Row sufficiently cooling, absorbed using heat transmission principle after fore bearing 7 and the heat of electro spindle servo motor stator 12 from rear bearing
The outlet of 27 cooling fluids outflows back to temperature automatic adjustment system, is used by temperature automatic adjustment system processing Posterior circle.
Built-in type servo motor rotor 11 is packed on electro spindle main shaft 35 by hot mounting means interference, in main shaft 35
Portion offers spiral water cooling water channel, and offer an aperture in the rear end of main shaft 35 is connected with spiral channel.Match somebody with somebody the inside of main shaft 35
Conjunction has main shaft inner water sleeve 16, and the external diameter of the main shaft inner water sleeve 16 and the internal diameter in the hole of main shaft 35 are engaged, the end of main shaft inner water sleeve 16
Leave some apertures.The rear end of main shaft 35 with the water inlet of high-speed joint 20 through being threadedly coupled, the delivery port of swivel joint 20 and master
The apopore of the rear end of axle 35 is connected, and forms the inner loop cooling water channel of electro spindle main shaft 35.Cooling fluid is through temperature during work
Degree automatically adjusts device thermostatic control system, then enters from the water inlet of high-speed joint 20, by water in electro spindle main shaft
Set 16 reaches the other end of main shaft inner water sleeve 16, then enters electro spindle from some apertures on electro spindle main shaft inner water sleeve 16
The spiral cooling channel of main shaft 35, by the helical flow of multi-turn, to electro spindle main shaft 35 and electro spindle servo motor rotor 11
It is sufficiently cooled, after utilization transmission principle absorption electro spindle servo motor rotor 11 and electro spindle after the heat of bearing 27
Temperature automatic adjustment system is outflowed back to from the outlet of high-speed joint 20, Posterior circle is handled by temperature automatic adjustment system
Use.
Claims (4)
1. cooling structure inside and outside a kind of high-speed electric main shaft, including electro spindle housing, front-end bearing pedestal and rear bearing are fixed with housing
Seat, through fore bearing, bearing is fixed with main shaft with after between front-end bearing pedestal and rear bearing block, and rotor, motor are set with main shaft
The motor stator being fixed on housing is cased with rotor, it is characterised in that be provided with multiple phases around motor stator in the housing
Intercommunicated casing annular water channel, the casing annular water channel one end connection front-end bearing pedestal outer diameter cylindrical on set it is annular cold
But water channel, annular cooling water road are in communication with the outside through housing, and the main shaft offers the line centered on spindle axis from rear end
Water flowing blind hole, the spiral water cooling water channel around the closing of water flowing blind hole, spiral water cooling water channel are offered inside the main shaft
It is connected with water flowing blind hole, rear-end of spindle offers the outlet pass being connected with spiral water cooling water channel, the water flowing of the main shaft
The main shaft inner water sleeve for enclosing coil water cooling water channel is equipped with blind hole, main shaft inner water sleeve is provided with and enclosing coil water cooling
But the limbers that water channel is connected, the water flowing blind hole are communicated with the water inlet for the high-speed joint for being threadedly secured in rear-end of spindle
Mouthful, the delivery port connection outlet pass of high-speed joint.
2. cooling structure inside and outside a kind of high-speed electric main shaft according to claim 1, it is characterised in that the housing and motor
The stator inner water sleeve for closing casing annular water channel is provided between stator.
3. cooling structure inside and outside a kind of high-speed electric main shaft according to claim 1, it is characterised in that the front-end bearing pedestal and
The ring-shaped water jacket for closed ring cooling water channel is provided between housing.
4. cooling structure inside and outside a kind of high-speed electric main shaft according to claim 1, it is characterised in that the casing annular water
The outer cooling water outlet mouth joint that road connection is placed on rear bearing block, the annular cooling water road connection are placed in outer on rear bearing block
Coolant intake joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510429443.7A CN104942649B (en) | 2015-07-21 | 2015-07-21 | Cooling structure inside and outside a kind of high-speed electric main shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510429443.7A CN104942649B (en) | 2015-07-21 | 2015-07-21 | Cooling structure inside and outside a kind of high-speed electric main shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104942649A CN104942649A (en) | 2015-09-30 |
| CN104942649B true CN104942649B (en) | 2017-12-01 |
Family
ID=54157992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510429443.7A Expired - Fee Related CN104942649B (en) | 2015-07-21 | 2015-07-21 | Cooling structure inside and outside a kind of high-speed electric main shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104942649B (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105598477B (en) * | 2016-01-08 | 2017-07-14 | 西安交通大学 | A kind of high-speed, high precision electro spindle cooled down based on shaft core heat pipe |
| CN106026449B (en) * | 2016-05-18 | 2018-05-08 | 中车株洲电机有限公司 | External rotor electric machine cooling device |
| CN106981943A (en) * | 2017-04-07 | 2017-07-25 | 上海蔚来汽车有限公司 | Electromotor cooling system |
| CN106849509B (en) * | 2017-04-25 | 2023-06-06 | 沈阳工程学院 | Hollow rotor cooling structure of ultra-high-speed permanent magnet motor |
| CN107297513B (en) * | 2017-08-08 | 2023-03-28 | 中国科学院合肥物质科学研究院 | Ultra-high-speed air static pressure parallel connection cooling structure for main shafts |
| CN107457606B (en) * | 2017-09-14 | 2019-10-11 | 西安交通大学 | Cooling structure and temperature cooperative control system inside and outside a kind of moving load with high speed electro spindle |
| CN108007691B (en) * | 2018-01-05 | 2024-05-24 | 广东省智能制造研究所 | Device and method for testing thermal power of high-speed bearing of electric spindle |
| CN108233669A (en) * | 2018-01-31 | 2018-06-29 | 江苏工大金凯高端装备制造有限公司 | A kind of fast tool servo device with quick cooling function |
| 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 |
| CN108942398A (en) * | 2018-07-08 | 2018-12-07 | 深圳市爱贝科精密机械有限公司 | A kind of electro spindle cooling body |
| CN108808951A (en) * | 2018-09-10 | 2018-11-13 | 刘克超 | A kind of underwater isolation motor |
| CN109236748A (en) * | 2018-11-02 | 2019-01-18 | 嘉兴德燃动力系统有限公司 | A kind of centrifugal ultrahigh speed air compressor machine coolant flow channel of fuel cell |
| AT521963B1 (en) * | 2019-01-30 | 2020-07-15 | Mag Ll M Christian Haeupl | Double spindle circular saw for sawing wood |
| CN111112652B (en) * | 2019-12-11 | 2020-12-11 | 珠海格力电器股份有限公司 | Internal and external cooling system, cooling method, electric spindle and machining center |
| CN110971093B (en) * | 2019-12-25 | 2022-12-27 | 宁波旭升集团股份有限公司 | A hot set board for motor casing |
| CN114749687B (en) * | 2022-06-15 | 2022-09-02 | 冈田精机(常州)有限公司 | Machine tool gear spindle with active cooling protection function |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0631585A (en) * | 1992-07-21 | 1994-02-08 | Mori Seiki Co Ltd | Cooling structure for main spindle device |
| JPH0871888A (en) * | 1994-08-31 | 1996-03-19 | Howa Mach Ltd | Spindle cooling device |
| CN203527144U (en) * | 2013-04-03 | 2014-04-09 | 宝鸡忠诚机床股份有限公司 | Internal-external cooling electric main shaft of high-speed turning center |
| CN103213029B (en) * | 2013-04-03 | 2016-08-03 | 宝鸡忠诚机床股份有限公司 | A kind of high-speed turning center electro spindle cooling means and inside and outside cooling electro spindle |
| CN203917957U (en) * | 2014-07-01 | 2014-11-05 | 兰州理工大学 | Can realize main shaft cooling electric main axle structure automatically |
-
2015
- 2015-07-21 CN CN201510429443.7A patent/CN104942649B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN104942649A (en) | 2015-09-30 |
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