CN111804936A - Dual-cooling electric spindle - Google Patents
Dual-cooling electric spindle Download PDFInfo
- Publication number
- CN111804936A CN111804936A CN201910283203.9A CN201910283203A CN111804936A CN 111804936 A CN111804936 A CN 111804936A CN 201910283203 A CN201910283203 A CN 201910283203A CN 111804936 A CN111804936 A CN 111804936A
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- CN
- China
- Prior art keywords
- cooling water
- water jacket
- cooling
- dual
- shell
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- Pending
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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
- 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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- 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
Abstract
The invention discloses a dual-cooling electric spindle which comprises a shaft component, a bearing and a barrel component which are coaxially arranged, wherein the barrel component is sleeved outside the shaft component, the shaft component comprises a shaft core and a rotor fixedly sleeved on the shaft core, the barrel component comprises a shell, an end component, an outer cooling water jacket, an inner cooling water jacket and a stator, the two end components are respectively fixed at two ends of the shell, two ends of the shaft core are respectively and rotatably connected with the two end components through the bearing, the outer cooling water jacket is fixed at the inner side of the shell, the inner cooling water jacket is fixed at the inner side of the outer cooling water jacket, the stator is fixed at the inner side of the inner cooling water jacket, a first layer of circulating cooling water channel on the outer surface of the outer cooling water jacket and the shell form a first sealing groove, and a second layer. According to the invention, the heat in the main shaft is effectively isolated by double cooling of the external cooling water jacket and the internal cooling water jacket, and the cooling efficiency of the cooling system is improved.
Description
Technical Field
The invention relates to the technical field of electric spindles, in particular to a double-cooling electric spindle.
Background
The electric spindle is a new technology which integrates a machine tool spindle and a spindle motor into a whole and appears in the field of numerical control machines. The transmission structure form of the spindle motor and the machine tool spindle which are combined into a whole enables the spindle part to be relatively independent from the transmission system and the whole structure of the machine tool, so that the spindle unit can be manufactured. The main shaft of the machine tool is directly driven by the built-in motor, so that the length of a main transmission chain of the machine tool is shortened to zero, and zero transmission of the machine tool is realized.
When the electric spindle works, the internal heat generation of the electric spindle cannot be avoided. The existing electric spindle is mainly characterized in that a cooling water jacket is additionally arranged between a spindle shell and a spindle motor stator for heat dissipation, but the cooling mode is low in heat dissipation efficiency, a single cooling jacket cannot effectively isolate heat emitted by a rotor, if a large amount of heat cannot be timely and effectively dissipated, and the heat is transferred out of the spindle shell through the cooling water jacket, the heat can cause thermal deformation to a machine tool, so that the machining precision of the machine tool is influenced.
Therefore, how to improve the heat dissipation efficiency of the electric spindle and avoid the influence on the running stability of the spindle is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to provide a double-cooling electric spindle, which is used for improving the heat dissipation efficiency of the electric spindle and avoiding the influence on the running stability of the spindle.
In order to achieve the purpose, the invention provides the following scheme:
the invention discloses a double-cooling electric main shaft which comprises a shaft component, a bearing and a cylinder component which are coaxially arranged, the cylinder component is sleeved outside the shaft component, the shaft component comprises a shaft core and a rotor fixedly sleeved on the shaft core, the cylinder component comprises a shell, end components, an outer cooling water jacket, an inner cooling water jacket and a stator, the two end components are respectively fixed at the two ends of the shell, the two ends of the shaft core are respectively and rotationally connected with the two end parts through the bearings, the outer cooling water jacket is fixed on the inner side of the shell, the inner cooling water jacket is fixed on the inner side of the outer cooling water jacket, the stator is fixed on the inner side of the inner cooling water jacket, a first layer of circulating cooling water path on the outer surface of the outer cooling water jacket and the shell enclose a first sealing groove, and a second layer of circulating cooling water path on the outer surface of the internal cooling water jacket and the shell form a second sealing groove in a surrounding mode.
Preferably, the end assembly comprises an outer sleeve and an end cover, the outer sleeve is fixedly sleeved on the outer ring of the bearing, and the end cover is fixed on one side, far away from the shell, of the outer sleeve.
Preferably, the number of the first seal grooves is plural, and the first seal groove is an annular groove coaxial with the shaft core.
Preferably, the number of the second seal grooves is plural, and the second seal groove is an annular groove coaxial with the shaft core.
Preferably, the bearing is a duplex ceramic ball bearing.
Preferably, the housing is a carbon fibre housing.
Preferably, the protective cover is of a cup-shaped structure, and a mouth of the protective cover is fixed on one of the end assemblies.
Preferably, the protective cover is a mesh cover structure.
Compared with the prior art, the invention has the following technical effects:
according to the invention, the heat in the main shaft is effectively isolated by double cooling of the external cooling water jacket and the internal cooling water jacket, the cooling efficiency of the cooling system is improved, the thermal deformation of the machine tool caused by the heat generated by the main shaft is reduced, and the machining precision of the machine tool is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural view of a dual-cooling electric spindle according to the present invention;
description of reference numerals: 1. an end cap; 2. a bearing; 3. a housing; 4. a first layer of circulating cooling water circuit; 5. an outer cooling jacket; 6. cooling the sleeve in the inner mode; 7. a second layer of circulating cooling water circuit; 8. a stator; 9. a rotor; 10. a protective cover; 11. a heat dissipation chamber; 12. and (4) a shaft core.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a double-cooling electric spindle, which is used for improving the heat dissipation efficiency of the electric spindle and avoiding the influence on the running stability of the spindle.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, the present embodiment provides a dual-cooling electric spindle, which includes a shaft assembly, a bearing 2, and a cylinder assembly, which are coaxially disposed.
Specifically, axle type subassembly and barrel subassembly are overall structure, and each subassembly relatively fixed inside an overall structure, the axle type subassembly outside is located to the barrel subassembly cover. The shaft component comprises a shaft core 12 and a rotor 9 fixedly sleeved on the shaft core 12, and the shaft core 12 and the rotor 9 are in interference fit and fixed. The cartridge assembly comprises a housing 3, an end assembly, an outer cooling jacket 5, an inner cooling jacket 6 and a stator 8. The two end components are respectively fixed at two ends of the shell 3, and two ends of the shaft core 12 are respectively connected with the two end components in a rotating way through the bearings 2. The outer cooling water jacket 5 is fixed on the inner side of the outer shell 3, the inner cooling water jacket 6 is fixed on the inner side of the outer cooling water jacket 5, the stator 8 is fixed on the inner side of the inner cooling water jacket 6, and the outer cooling water jacket 5 and the outer shell 3, the inner cooling water jacket 6 and the outer cooling water jacket 5, and the stator 8 and the inner cooling water jacket 6 are fixed in an interference fit mode. A first layer of circulating cooling water path 4 on the outer surface of the outer cooling water jacket 5 and the shell 3 form a first sealing groove in a surrounding mode, and a second layer of circulating cooling water path 7 on the outer surface of the inner cooling water jacket 6 and the shell 3 form a second sealing groove in a surrounding mode.
When the dual-cooling electric spindle of the embodiment is used, the shaft component can rotate relative to the cylinder component due to the arrangement of the bearing 2. The first sealing groove and the second sealing groove are filled with water or other cooling liquid, and heat generated by friction is absorbed by the cooling liquid during rotation. Through setting up outer cooling water jacket 5 and interior cooling water jacket 6, can realize dual cooling, effectively isolated main shaft is inside heat. The first sealing groove and the second sealing groove are preferably arranged in a staggered mode in the axial direction of the shaft assembly, and the outer cooling water jacket 5 can cool a working blind area of the inner cooling water jacket 6 through the superposition complementation of the first sealing groove and the heat dissipation area of the second sealing groove, so that heat emitted from the inside of the main shaft can be absorbed to a large extent, and the cooling efficiency of the cooling system can be improved.
The tip subassembly of this embodiment includes overcoat and end cover 1, and the overcoat is fixed to overlap and is located on the outer lane of bearing 2, realizes being connected with bearing 2, and end cover 1 is fixed in the one side of keeping away from shell 3 on the overcoat through the fastener for carry out dustproof protection to inner structure.
The first seal groove and the second seal groove of the present embodiment are annular grooves coaxial with the shaft core 12, so that cooling is performed in the entire circumferential direction of the shaft core 12. The first seal groove and the second seal groove of this embodiment are a plurality of to the whole heat transfer area of increase seal groove improves cooling efficiency. The first sealing grooves are distributed at equal intervals, the second sealing grooves are distributed at equal intervals, and the groove width of the first sealing grooves is equal to the interval distance of the second sealing grooves, so that the first sealing grooves and the second sealing grooves are just complementary, and the phenomenon that the weight of cooling liquid caused by mutual overlapping of the first sealing grooves and the second sealing grooves in the axial direction is overlarge is avoided.
The bearing 2 of the embodiment is preferably a duplex ceramic ball bearing 2, and is used for improving the high temperature resistance of the bearing, so that the electric spindle has high limit rotation speed and good stability. The housing 3 of the present embodiment is preferably made of carbon fiber, thereby reducing the overall weight and improving the heat conductivity.
Further, the present embodiment further includes a protective cover 10, the protective cover 10 is a cup-shaped structure, a mouth portion of the protective cover 10 is fixed to one of the end assemblies, and the protective cover 10 and the housing 3 enclose a heat dissipation chamber 11. One end of the shaft core 12 is used for being connected with a machining cutter in a transmission mode, the other end of the shaft core 12 extends into the heat dissipation cavity 11, the heat dissipation end of the shaft core 12 is covered while heat dissipation is guaranteed, and safety is improved.
The protective cover 10 of the present embodiment is a mesh structure, so that the air in the heat dissipation chamber 11 can smoothly circulate with the outside air, thereby improving the natural heat dissipation capability. Besides natural heat dissipation, the fast cooling in the heat dissipation chamber 11 can be realized by increasing the air flow speed (blowing or sucking air into the heat dissipation chamber 11) or introducing cold air, which is a conventional technical means and is not described herein again.
The present embodiment preferably uses a permanent magnet synchronous motor as a drive to drive the rotor 9 and the stator 8 to rotate relatively. The permanent magnet synchronous motor is adopted to avoid the loss of the rotor 9, reduce the heat productivity of the shaft core 12, reduce the heat production in the machine body and better solve the problem of the thermal deformation of the shaft core 12 caused by the heat production of the rotor 9.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A double-cooling electric main shaft is characterized by comprising a shaft component, a bearing and a cylinder component which are coaxially arranged, the cylinder component is sleeved outside the shaft component, the shaft component comprises a shaft core and a rotor fixedly sleeved on the shaft core, the cylinder component comprises a shell, end components, an outer cooling water jacket, an inner cooling water jacket and a stator, the two end components are respectively fixed at the two ends of the shell, the two ends of the shaft core are respectively and rotationally connected with the two end parts through the bearings, the outer cooling water jacket is fixed on the inner side of the shell, the inner cooling water jacket is fixed on the inner side of the outer cooling water jacket, the stator is fixed on the inner side of the inner cooling water jacket, a first layer of circulating cooling water path on the outer surface of the outer cooling water jacket and the shell enclose a first sealing groove, and a second layer of circulating cooling water path on the outer surface of the internal cooling water jacket and the shell form a second sealing groove in a surrounding mode.
2. The dual-cooling motorized spindle of claim 1, wherein the end assembly includes a housing fixedly disposed about the outer race of the bearing and an end cap secured to a side of the housing remote from the housing.
3. The dual cooling electric spindle of claim 1, wherein the first sealing groove is a plurality of grooves, and the first sealing groove is an annular groove coaxial with the shaft core.
4. The dual cooling electric spindle of claim 1, wherein the second sealing groove is a plurality of grooves, and the second sealing groove is an annular groove coaxial with the shaft core.
5. The dual-cooled motorized spindle of claim 1, wherein said bearing is a duplex ceramic ball bearing.
6. The dual-cooled motorized spindle of claim 1, wherein said housing is a carbon fiber housing.
7. The dual-cooling motorized spindle of claim 1, further comprising a protective cover having a cup-shaped configuration, a mouth of said protective cover being secured to one of said end assemblies.
8. The dual-cooling electric spindle of claim 7, wherein the protective enclosure is a mesh enclosure structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910283203.9A CN111804936A (en) | 2019-04-10 | 2019-04-10 | Dual-cooling electric spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910283203.9A CN111804936A (en) | 2019-04-10 | 2019-04-10 | Dual-cooling electric spindle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111804936A true CN111804936A (en) | 2020-10-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910283203.9A Pending CN111804936A (en) | 2019-04-10 | 2019-04-10 | Dual-cooling electric spindle |
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| Country | Link |
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| CN (1) | CN111804936A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114211305A (en) * | 2021-12-22 | 2022-03-22 | 珠海格力电器股份有限公司 | Axial and radial combined cooling structure for electric spindle, electric spindle and machine tool |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201230245Y (en) * | 2008-07-08 | 2009-04-29 | 重庆工学院 | Electric main shaft construction having circulated water sleeve |
| CN101436804A (en) * | 2008-12-16 | 2009-05-20 | 华南理工大学 | Electric principal shaft with composite stator structure |
| CN102114613A (en) * | 2010-11-11 | 2011-07-06 | 东南大学 | Efficient inner-cooling electric spindle |
| CN202239663U (en) * | 2011-08-08 | 2012-05-30 | 北一精机（北京）设计有限公司 | In-built electric main shaft with double-layered cooling structure |
| CN202278197U (en) * | 2011-09-16 | 2012-06-20 | 安阳斯普机械有限公司 | Electric spindle of boring mill |
| CN203170986U (en) * | 2013-03-29 | 2013-09-04 | 西安北村精密机械有限公司 | Small milling motorized spindle |
| CN103567468A (en) * | 2013-09-16 | 2014-02-12 | 浙江日发精密机械股份有限公司 | Two-channel water-cooling electric spindle of digital controlled lathe |
| CN205566014U (en) * | 2016-04-07 | 2016-09-07 | 温岭市宇海机电有限公司 | Electric main shaft of two coolings |
| CN106425635A (en) * | 2016-12-15 | 2017-02-22 | 常州机电职业技术学院 | Electric main shaft based on dynamic-pressure sliding bearings |
-
2019
- 2019-04-10 CN CN201910283203.9A patent/CN111804936A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201230245Y (en) * | 2008-07-08 | 2009-04-29 | 重庆工学院 | Electric main shaft construction having circulated water sleeve |
| CN101436804A (en) * | 2008-12-16 | 2009-05-20 | 华南理工大学 | Electric principal shaft with composite stator structure |
| CN102114613A (en) * | 2010-11-11 | 2011-07-06 | 东南大学 | Efficient inner-cooling electric spindle |
| CN202239663U (en) * | 2011-08-08 | 2012-05-30 | 北一精机（北京）设计有限公司 | In-built electric main shaft with double-layered cooling structure |
| CN202278197U (en) * | 2011-09-16 | 2012-06-20 | 安阳斯普机械有限公司 | Electric spindle of boring mill |
| CN203170986U (en) * | 2013-03-29 | 2013-09-04 | 西安北村精密机械有限公司 | Small milling motorized spindle |
| CN103567468A (en) * | 2013-09-16 | 2014-02-12 | 浙江日发精密机械股份有限公司 | Two-channel water-cooling electric spindle of digital controlled lathe |
| CN205566014U (en) * | 2016-04-07 | 2016-09-07 | 温岭市宇海机电有限公司 | Electric main shaft of two coolings |
| CN106425635A (en) * | 2016-12-15 | 2017-02-22 | 常州机电职业技术学院 | Electric main shaft based on dynamic-pressure sliding bearings |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114211305A (en) * | 2021-12-22 | 2022-03-22 | 珠海格力电器股份有限公司 | Axial and radial combined cooling structure for electric spindle, electric spindle and machine tool |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20201023 |