CN104942649A - Internal and external cooling structure for high-speed motorized spindle - Google Patents
Internal and external cooling structure for high-speed motorized spindle Download PDFInfo
- Publication number
- CN104942649A CN104942649A CN201510429443.7A CN201510429443A CN104942649A CN 104942649 A CN104942649 A CN 104942649A CN 201510429443 A CN201510429443 A CN 201510429443A CN 104942649 A CN104942649 A CN 104942649A
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- China
- Prior art keywords
- water
- main shaft
- cooling
- housing
- water channel
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Classifications
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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
- 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
Abstract
The invention provides an internal and external cooling structure for high-speed motorized spindle. According to the structure, cooling water channels are additionally arranged on a casing of the motorized spindle and a front bearing pedestal of the motorized spindle, and a spiral cooling water channel is arranged in the spindle, so that all the main heating components such as a motor stator, a motor rotor, a front bearing and a back bearing of the motorized spindle can be efficiently cooled, therefore, the temperature rising of the motorized spindle is effectively controlled, the service life of a motor and the service life of bearings can be prolonged, and the machining precision and surface machining quality of the motorized spindle are greatly improved by virtue of the reduction of thermal deformation.
Description
Technical field
The present invention relates to cooling structure inside and outside a kind of high-speed electric main shaft, especially a kind of inside and outside while cooling electric main shaft cooling structure.
Background technology
The main feature of high-speed electric main shaft the stator and rotor of motor is directly loaded the electrical integrated electro spindle of the inner forming machine of main shaft.Thus, achieve " Zero-drive Chain " of axis system, have that compact conformation, rotary inertia are little, start and stop speed fast, be easy to realize the advantage such as stepless time adjustment and precise hard_drawn tuhes, but the heat radiation of this structure to electro spindle of electro spindle is and disadvantageous.Built-in type electro spindle is mainly made up of built-in type servomotor, front and back spring bearing, main shaft and housing, and wherein built-in type servomotor and forward and backward bearing are the main heat generating components of electro spindle.Temperature rise is an important indicator of electro spindle component capabilities, ADGM electro spindle works under larger load-up condition of being everlasting, main shaft stator and rotor and front and back spring bearing can produce a large amount of heats in the process of work, these heats can pass to the part such as main shaft and housing, cause producing displacement of the lines and angular displacement in spindle processing process, affect the crudy of machining accuracy and piece surface.
The heat of electro spindle is mainly by the loss of motor and the fricative of bearing, and wherein the loss 2/3 of motor is produced by stator, and 1/3 is produced by rotor.Traditional cooling means is the cooling water channel being equipped with spiral between motor stator and housing, water annulus is added between front-end bearing pedestal and housing, connected by the rear water-in and water-out joint covered greatly, internal cooling water takes away the heat of motor stator and fore bearing, play the effect of cooling fore bearing and stator, but the rotor and the rear bearing that account for motor quantity of heat production 1/3 are not effectively cooled, thus electro spindle defines phenomenon cold outside and hot inside.And the thermal expansion of main shaft is fatal for the impact of machining accuracy, if when the diameter in the axle center of main shaft calculates according to 0.5m, then according to the thermal expansion theory of metal, if the axle center temperature of main shaft often rises 1 DEG C, the length of main shaft will extend 0.005m, if the thermal deformation caused thus is dealt with improperly, machining accuracy and the suface processing quality of electro spindle can be had a strong impact on the one hand, on the other hand because the temperature of the ratio inner ring of bearing outer ring is high, the pretension amount causing bearing strengthens, exacerbate the wearing and tearing heating of bearing further, affect the service life of bearing.A kind of axle center cooling means is had at present: go out to be provided with cooling heat pipe at the housing of electro spindle and axle center for this phenomenon, although this cooling means can play cooling effect to electro spindle to a certain extent, but the cooling medium of this cooling means is not liquid but air, because the hot exchange power of air is limited, in this way can not effectively solution electro spindle work long hours under heat dissipation problem.
Summary of the invention
The object of the invention is to solve the deficiencies in the prior art, pass through the present invention, electro spindle housing and electro spindle front-end bearing pedestal add cooling water channel, be provided with spiral cooling-water duct in main shaft inside simultaneously, realize electro spindle major heat producing components as high efficiency cooling while motor stator and rotor and front and back bearings, thus effectively control the temperature rise of electro spindle, improve the service life of motor and bearing, the machining accuracy of electro spindle and suface processing quality promote greatly due to the minimizing of thermal deformation simultaneously.
Technical scheme of the present invention is, comprise electro spindle housing, housing internal fixtion has front-end bearing pedestal and rear bearing block, main shaft is fixed with through fore bearing and rear bearing between front-end bearing pedestal and rear bearing block, main shaft is set with rotor, on rotor, cover has the motor stator be fixed on housing, multiple casing annular water channel be interconnected is provided with around motor stator in described housing, one end of described water annulus is communicated with the annular cooling fluid water channel that front-end bearing pedestal outer diameter cylindrical is arranged, annular cooling water road is in communication with the outside through housing, described main shaft offers the water flowing blind hole of line centered by spindle axis from rear end, described main shaft inside offers the spiral water cooling water channel closed around water flowing blind hole, spiral water cooling water channel is connected with water flowing blind hole, rear-end of spindle offers the outlet pass be connected with spiral water cooling water channel.
The stator inner water sleeve for housings close water annulus is provided with between described housing and motor stator.
The ring-shaped water jacket for closed ring cold water water channel is provided with between described front-end bearing pedestal and housing.
Described casing annular water channel is communicated with the outer cooling water outlet mouth joint be placed on rear bearing block, and described annular cooling fluid water channel is communicated with the outer coolant intake joint be placed on rear bearing block.
Be equipped with the main shaft inner water sleeve for enclosing coil water cooling water channel in the water flowing blind hole of described main shaft, main shaft inner water sleeve is provided with the limbers be connected with enclosing coil water cooling water channel.
Described water flowing blind hole is communicated with the water inlet that screw thread is fixed on the high-speed joint of rear-end of spindle, and the delivery port of high-speed joint is communicated with outlet pass.
The invention has the beneficial effects as follows, can simultaneously to the pyrotoxin of electro spindle: electro spindle servomotor stator and rotor and the forward and backward bearing of electro spindle cool, thus improve the service life of servomotor and bearing; Axle center cooling structure can also reduce the temperature rise of electro spindle main shaft, thus effectively improves electro spindle machining accuracy and suface processing quality.
Accompanying drawing explanation
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 external refrigeration of the present invention.
Fig. 3 is the inner colded three-dimensional simulation schematic diagram of the present invention.
Fig. 4 is the three-dimensional simulation schematic diagram of the inside and outside entirety cooling of the present invention.
In Fig. 1: 1 screw, 2 driving keys, 3 protecgulums, 4 screws, 5 housings, 6 seal covers, 7 fore bearings, 8 front-end bearing pedestals, 9 holding screws, 10 gimbals, 11 rotors, 12 stators, 13 holding screws, 14 armature nut, 15 O RunddichtringOs, 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 base nuts, 22 screws, 23 coding disks, 24 outer coolant intake joints, 25 code-disc bases, 26 rear bearing nuts, 27 rear bearings, 28 rear bearing back-up rings, 29 rotor inner sleeves, 30 stator inner water sleeves, 31 keys, 32 fore bearing nuts, 33 sealing rings, 34 O RunddichtringOs, 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.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Known according to Fig. 1 to Fig. 4, cooling structure of the present invention is mainly concerned with: screw 1, driving key 2, protecgulum 3, screw 4, housing 5, seal cover 6, fore bearing 7, front-end bearing pedestal 8, holding screw 9, gimbal 10, rotor 11, stator 12, holding screw 13, armature nut 14, O RunddichtringO 15, main shaft inner water sleeve 16, rear bearing block 17, gland 18, cooling water outlet mouth joint 19, swivel joint 20, code-disc base nut 21, screw 22, coding disk 23, coolant intake joint 24, code-disc base 25, rear bearing nut 26, rear bearing 27, rear bearing back-up ring 28, rotor inner sleeve 29, stator inner water sleeve 30, key 31, fore bearing nut 32, sealing ring 33, O RunddichtringO 34, main shaft 35.Wherein electro spindle fore bearing 7 is installed in front-end bearing pedestal 8, and closely cooperates with front-end bearing pedestal 8, and the outer diameter cylindrical face of front-end bearing pedestal 8 processes an annular cooling fluid water channel.A stator inner water sleeve 30 is added between electro spindle housing 5 and built-in type servo stators 12, this stator inner water sleeve 30 external diameter and electro spindle housing 5 minor diameter fit assemble, stator inner water sleeve 30 internal diameter and built-in type servo motor stator 12 major diameter fit assemble, electro spindle housing 5 offers a series of water annulus, these water annulus are communicated as one, rear bearing block 17 rear end offers entery and delivery port, entery and delivery port is provided with 24,19 Inlet and outlet water joints, rear bearing block 17 and electro spindle housing 5 offers the duct of Cooling Water circulation.During work, cooling fluid is through thermostat thermostatic control system, then enter from the water inlet of rear bearing block 17 rear end, limbers on electro spindle rear bearing block 17 and electro spindle housing 5 enters into the annular cooling water road of front-end bearing pedestal 8, cooling fore bearing 7, enter the annular cooling water road on housing 5 afterwards, through the annularly flow of multi-turn, electro spindle servo motor stator 12 is cooled fully, temperature automatic adjustment system is got back to from rear bearing 27 cooling fluid outlet outflow after utilizing delivered heat principle to absorb fore bearing 7 and electro spindle servo motor stator 12 heat, use through temperature automatic adjustment system process Posterior circle.
Built-in type servo motor rotor 11 is packed on electro spindle main shaft 35 by hot mounting means interference, offers spiral water cooling water channel in main shaft 35 inside, offers an aperture be connected with spiral channel in main shaft 35 rear end.Main shaft 35 internal engagement has main shaft inner water sleeve 16, and the external diameter of this main shaft inner water sleeve 16 and the diameter compatible in main shaft 35 hole close, and some apertures are left in main shaft inner water sleeve 16 end.Main shaft 35 rear end and high-speed joint 20 water inlet are through being threaded, and swivel joint 20 delivery port is connected with the apopore of main shaft 35 rear end, define electro spindle main shaft 35 circulate cooling water inside road.During work, cooling fluid is through thermostat thermostatic control system, then enter from the water inlet of high-speed joint 20, the other end of main shaft inner water sleeve 16 is arrived through electro spindle main shaft inner water sleeve 16, then electro spindle main shaft 35 spiral cooling channel is entered into from the some apertures electro spindle main shaft inner water sleeve 16, through the helical flow of multi-turn, electro spindle main shaft 35 and electro spindle servo motor rotor 11 are cooled fully, utilization transmission principle exports outflow from high-speed joint 20 after absorbing electro spindle servo motor rotor 11 and electro spindle rear bearing 27 heat and gets back to temperature automatic adjustment system, use through temperature automatic adjustment system process Posterior circle.
Claims (6)
1. cooling structure inside and outside a high-speed electric main shaft, comprise electro spindle housing, housing internal fixtion has front-end bearing pedestal and rear bearing block, main shaft is fixed with through fore bearing and rear bearing between front-end bearing pedestal and rear bearing block, main shaft is set with rotor, on rotor, cover has the motor stator be fixed on housing, it is characterized in that, multiple casing annular water channel be interconnected is provided with around motor stator in described housing, one end of described water annulus is communicated with the annular cooling fluid water channel that front-end bearing pedestal outer diameter cylindrical is arranged, annular cooling water road is in communication with the outside through housing, described main shaft offers the water flowing blind hole of line centered by spindle axis from rear end, described main shaft inside offers the spiral water cooling water channel closed around water flowing blind hole, spiral water cooling water channel is connected with water flowing blind hole, rear-end of spindle offers the outlet pass be connected with spiral water cooling water channel.
2. cooling structure inside and outside a kind of high-speed electric main shaft according to claim 1, is characterized in that, is provided with the stator inner water sleeve for housings close water annulus between described housing and motor stator.
3. cooling structure inside and outside a kind of high-speed electric main shaft according to claim 1, is characterized in that, is provided with the ring-shaped water jacket for closed ring cold water water channel between described front-end bearing pedestal and housing.
4. cooling structure inside and outside a kind of high-speed electric main shaft according to claim 1, it is characterized in that, described casing annular water channel is communicated with the outer cooling water outlet mouth joint be placed on rear bearing block, and described annular cooling fluid water channel is communicated with the outer coolant intake joint be placed on rear bearing block.
5. cooling structure inside and outside a kind of high-speed electric main shaft according to claim 1, it is characterized in that, be equipped with the main shaft inner water sleeve for enclosing coil water cooling water channel in the water flowing blind hole of described main shaft, main shaft inner water sleeve is provided with the limbers be connected with enclosing coil water cooling water channel.
6. cooling structure inside and outside a kind of high-speed electric main shaft according to claim 1, is characterized in that, described water flowing blind hole is communicated with the water inlet that screw thread is fixed on the high-speed joint of rear-end of spindle, and the delivery port of high-speed joint is communicated with outlet pass.
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 |
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| CN104942649A true CN104942649A (en) | 2015-09-30 |
| CN104942649B CN104942649B (en) | 2017-12-01 |
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| 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 |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105598477A (en) * | 2016-01-08 | 2016-05-25 | 西安交通大学 | High-speed high-accuracy electric spindle based on spindle core heat pipe cooling |
| CN106026449A (en) * | 2016-05-18 | 2016-10-12 | 中车株洲电机有限公司 | External rotor motor cooling device |
| CN106849509A (en) * | 2017-04-25 | 2017-06-13 | 沈阳工程学院 | A kind of ultrahigh speed magneto sleeve rotor cooling structure |
| CN107297513A (en) * | 2017-08-08 | 2017-10-27 | 中国科学院合肥物质科学研究院 | A kind of ultrahigh speed air static pressure electric spindle cooling structure in parallel |
| CN107457606A (en) * | 2017-09-14 | 2017-12-12 | 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 |
| 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 |
| CN108007691A (en) * | 2018-01-05 | 2018-05-08 | 广东省智能制造研究所 | A kind of electro spindle high-speed bearing thermal power test device and method |
| 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 |
| 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 |
| WO2018184328A1 (en) * | 2017-04-07 | 2018-10-11 | 上海蔚来汽车有限公司 | Motor cooling system |
| 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 |
| 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 |
| CN110971093A (en) * | 2019-12-25 | 2020-04-07 | 宁波旭升汽车技术股份有限公司 | A hot set board for motor casing |
| CN111112652A (en) * | 2019-12-11 | 2020-05-08 | 珠海格力电器股份有限公司 | Internal and external cooling system, cooling method, electric spindle and machining center |
| US20220176581A1 (en) * | 2019-01-30 | 2022-06-09 | Christian Häupl | Dual-spindle circular saw for sawing wood |
| CN114749687A (en) * | 2022-06-15 | 2022-07-15 | 冈田精机(常州)有限公司 | Machine tool gear spindle with active cooling protection |
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| CN203917957U (en) * | 2014-07-01 | 2014-11-05 | 兰州理工大学 | Can realize main shaft cooling electric main axle structure automatically |
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Cited By (21)
| 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 |
| CN105598477A (en) * | 2016-01-08 | 2016-05-25 | 西安交通大学 | High-speed high-accuracy electric spindle based on spindle core heat pipe cooling |
| CN106026449A (en) * | 2016-05-18 | 2016-10-12 | 中车株洲电机有限公司 | External rotor motor cooling device |
| CN106026449B (en) * | 2016-05-18 | 2018-05-08 | 中车株洲电机有限公司 | External rotor electric machine cooling device |
| WO2018184328A1 (en) * | 2017-04-07 | 2018-10-11 | 上海蔚来汽车有限公司 | Motor cooling system |
| CN106849509A (en) * | 2017-04-25 | 2017-06-13 | 沈阳工程学院 | A kind of ultrahigh speed magneto sleeve rotor cooling structure |
| CN107297513A (en) * | 2017-08-08 | 2017-10-27 | 中国科学院合肥物质科学研究院 | A kind of ultrahigh speed air static pressure electric spindle cooling structure in parallel |
| 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 |
| CN107457606A (en) * | 2017-09-14 | 2017-12-12 | 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 |
| CN108007691A (en) * | 2018-01-05 | 2018-05-08 | 广东省智能制造研究所 | A kind of electro spindle high-speed bearing thermal power test device and method |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| US20220176581A1 (en) * | 2019-01-30 | 2022-06-09 | Christian Häupl | Dual-spindle circular saw for sawing wood |
| CN111112652A (en) * | 2019-12-11 | 2020-05-08 | 珠海格力电器股份有限公司 | Internal and external cooling system, cooling method, electric spindle and machining center |
| CN110971093A (en) * | 2019-12-25 | 2020-04-07 | 宁波旭升汽车技术股份有限公司 | A hot set board for motor casing |
| CN114749687A (en) * | 2022-06-15 | 2022-07-15 | 冈田精机(常州)有限公司 | Machine tool gear spindle with active cooling protection |
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