CN203599538U - High-speed air floatation electric spindle - Google Patents
High-speed air floatation electric spindle Download PDFInfo
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- CN203599538U CN203599538U CN201320740754.1U CN201320740754U CN203599538U CN 203599538 U CN203599538 U CN 203599538U CN 201320740754 U CN201320740754 U CN 201320740754U CN 203599538 U CN203599538 U CN 203599538U
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- air
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Abstract
The utility model discloses a high-speed air flotation electric spindle. The high-speed air flotation electric spindle comprises a body, a stator, an upper air flotation bearing, a lower air floatation bearing, a shaft core and a fixed shaft. Communicated gas transmission channels are arranged on the body, the upper air flotation bearing and the lower air flotation bearing and used for forming gas films enabling the shaft core to suspend, a cooling water channel is formed in the fixed shaft, a cooling gap communicated with the cooling water channel is formed between the outer surface of the fixed shaft and the inner surface of the shaft core, the top of the cooling gas is closed and the lower portion of the cooling gap is opened. According to the high-speed air flotation electric spindle, the cooling water channel is formed in the fixed shaft, during work, cooling water is directly and continuously sprayed towards the inner wall of the shaft core, then the cooling gap is filled with the cooling water so as to continuously cool the shaft core, and therefore the purpose of lowering the temperature of the shaft core is achieved; the cooling gap is simple in structure and convenient to process; the cooling water directly makes contact with the shaft core, so that the cooling efficiency is high, and therefore it is guaranteed that the electric spindle has better stability and higher precision.
Description
Technical field
The utility model relates to the Precision Machining main shaft in Digit Control Machine Tool, relates in particular to a kind of high-speed air floatation electricity main shaft.
Background technology
Air-floating main shaft is to utilize high velocity air between rotating shaft and bearing, to form the air film of thin layer, and realize a kind of Novel sliding Bearning mechanism of rotating shaft high-speed rotation using this as lubricant, it has little, high temperature resistant, the free of contamination advantage of viscosity, thereby be more and more applied in Digit Control Machine Tool, various parts are processed to processing.General, the rotating speed of this main shaft is high, longevity of service, under such condition of work, it is serious that the problem of bringing is exactly machine heating, easily causes rotating shaft and bearing deformation, thereby affect machining accuracy, the stability that reduces main shaft work, shortens its service life.People design the main shaft with water cooling system for this reason, as Chinese Patent Application No.: 200610124264 utility model patent, a kind of air floated high speed electric mandrel is disclosed, it is provided with water cooling system on body, thereby reaches the effect to rotating shaft cooling.But the water cooling system using in above-mentioned patent can not directly act on rotating shaft and bearing, its cooling efficiency is lower; And the aquaporin more complicated in this water cooling system, is difficult to processing, thereby has increased manufacturing cost.
Utility model content
For the deficiencies in the prior art, the purpose of this utility model is to provide a kind of high-speed air floatation electricity main shaft, and it has easy processing, feature that cooling effectiveness is high, thereby guarantees that electric main shaft has better stability and more high-precision advantage.
For achieving the above object, the utility model adopts following technical scheme:
A kind of high-speed air floatation electricity main shaft, comprise body, stator, upper air-bearing, lower air-bearing, axle core and dead axle, described stator is fixed on internal body, upper air-bearing and lower air-bearing are installed in respectively the upper and lower of stator, on axle core, be fixed with the rotor matching with stator, this axle core is arranged in the axially extending bore of stator, upper air-bearing and the formation of lower air-bearing, and described dead axle is arranged in axle in-core and is fixed on body; Wherein, described body, upper air-bearing and lower air-bearing are provided with the gas distribution channel of connection, and this gas distribution channel for producing the air film that this axle core is suspended between described axle core and the contact-making surface of upper and lower air-bearing; In described dead axle, be provided with the cooling-water duct that runs through dead axle upper and lower surface, between the outer surface of dead axle and the inner surface of axle core, be provided with the cooling gap being connected with this cooling-water duct, this cooling gap top seal, lower openings.
Further, also comprise the thrust bearing of being located at lower air-bearing below, described axle core lower sides convex is provided with annular brace portion, and this support portion is inserted between lower air-bearing and thrust bearing.
Further, described gas distribution channel comprises main channel, the upper air supporting passage of being located at air-bearing inside be located in organism sidewall, be located at the lower air supporting passage of lower air-bearing inside and be located at the thrust air supporting passage of thrust bearing inside, on this, air supporting passage, lower air supporting passage and thrust air supporting passage are all communicated with main channel, and on this, air supporting passage, lower air supporting passage and thrust air supporting passage are equipped with the damping hole that leads to axle core outer surface.
Further, described main channel is divided in organism sidewall and along axial perforation body; Described upper air supporting passage comprises the first annular air slot and is distributed in the several first axial wireway on this first annular air slot circumference; Described lower air supporting passage comprises the second annular air slot and is distributed in the several second axial wireway on this second annular air slot circumference; Described thrust air supporting passage comprises the 3rd annular air slot and is distributed in several the first radial guiding tracheaes on the 3rd annular air slot circumference.
Further, the both ends up and down of the described first axial wireway and the second axial wireway are equipped with the radially damping hole that leads to axle core outer surface; The lower end of the described second axial wireway is also provided with the second radial guiding tracheae, and this second radial guiding tracheae is provided with the axial damping hole that leads to described axle core support portion upper surface; The first radial guiding tracheae of described thrust bearing is provided with the axial damping hole that leads to described axle core support portion lower surface.
Further, the axial damping hole that leads to axle core support portion described in is radially provided with at least two rows.
Further, described cooling-water duct comprises main cooling water passage and secondary cooling-water duct, and this pair cooling-water duct is connected by hole for water spraying with described cooling gap.
Further, described dead axle lower end is provided with the outlet pipe that is communicated with main cooling water passage, this outlet pipe stretches out in axle core lower surface, axle core inner is provided with the conical surface near dead axle lower surface place, the lower surface of this conical surface and dead axle forms an accommodating cavity, and this accommodating cavity is connected the bottom in described cooling gap and is in communication with the outside by the gap between outlet pipe and axle core.
As mentioned above, a kind of high-speed air floatation electricity of the utility model main shaft is arranged on cooling-water duct in dead axle, in the time of work, constantly directly spray cooling water to axle in-core wall, this cooling water and then be full of described cooling gap and axle core continued cooling, reaches the object that reduces axle core temperature, and this chilling room gap structure is simple, be easy to processing, and cooling water directly contacts with axle core, and cooling effectiveness is high, thereby guarantee that this electricity main shaft has the precision of better stability and Geng Gao.
Accompanying drawing explanation
Fig. 1 is the longitudinal sectional view of a kind of high-speed air floatation electricity of the utility model main shaft;
Fig. 2 is the longitudinal sectional view (for the ease of clear its internal structure of demonstration, having removed these parts of dead axle) of another angle of a kind of high-speed air floatation electricity of the utility model main shaft;
Fig. 3 is that thrust bearing A of the present utility model is to cutaway view;
Fig. 4 is the longitudinal sectional view of dead axle of the present utility model and axle core.
Wherein: 10, body; 11, main channel; 21, stator; 22, rotor; 30, upper air-bearing; 31, the first annular air slot; 32, the first axial wireway; 40, lower air-bearing; 41, the second annular air slot; 42, the second axial wireway; 43, the second radial guiding tracheae; 50, axle core; 51, support portion; 60, thrust bearing; 61, the 3rd annular air slot; 62, the first radial guiding tracheae; 70, dead axle; 71, cooling-water duct; 711, main cooling water passage; 712, secondary cooling-water duct; 713, outlet pipe; 72, hole for water spraying; 73, accommodating cavity; 75, cooling gap; 361, damping hole radially; 362, axial damping hole.
The specific embodiment
Below, by reference to the accompanying drawings and the specific embodiment, the utility model is described further:
Refer to Fig. 1 to Fig. 4, the utility model provides a kind of high-speed air floatation electricity main shaft, and one preferred embodiment comprises body 10, stator 21, upper air-bearing 30, lower air-bearing 40, axle core 50, thrust bearing 60 and dead axle 70.
Described stator 21 is fixed on body 10 inside, upper air-bearing 30 and lower air-bearing 40 are fixed at respectively the upper and lower of stator 21, described thrust bearing 60 is positioned at lower air-bearing 40 belows, on axle core 50, be fixed with the rotor 22 matching with stator 21, this axle core 50 is arranged in the axially extending bore forming between stator 21, upper air-bearing 30, lower air-bearing 40 and thrust bearing 60, particularly, axle core 50 lower sides convexes are provided with annular brace portion 51, and this support portion 51 is inserted between lower air-bearing 40 and thrust bearing 60.
Described body 10, upper air-bearing 30, lower air-bearing 40 and thrust bearing 60 are provided with the gas distribution channel of connection, in the time that machine is worked, by input high pressure draught in gas distribution channel, can produce the air film that rotating shaft is suspended, thereby make axle core 50 energy friction free high-speed rotation; Particularly, this gas distribution channel comprises main channel 11, the upper air supporting passage of being located at air-bearing 30 inside be located in body 10 sidewalls, be located at the lower air supporting passage of lower air-bearing 40 inside and be located at the thrust air supporting passage of thrust bearing 60 inside, and described main channel 11 is divided in body 10 sidewalls and along axial perforation body 10; On this, air supporting passage, lower air supporting passage and thrust air supporting passage are all communicated with main channel 11, and on this, air supporting passage, lower air supporting passage and thrust air supporting passage are equipped with the damping hole that leads to axle core 50 outer surfaces, air-flow is sprayed on axle core 50 outer surfaces from these damping holes, thereby between axle core 50 and bearing, forms described air film.
Particularly, described upper air supporting passage comprises the first annular air slot 31 and is distributed in the several first axial wireway 32 on these first annular air slot 31 circumference; Described lower air supporting passage comprises the second annular air slot 41 and is distributed in the several second axial wireway 42 on these second annular air slot 41 circumference; Described thrust air supporting passage comprises the 3rd annular air slot 61 and is distributed in several the first radial guiding tracheaes 62 on the 3rd annular air slot 61 circumference; The both ends up and down of this first axial wireway 32 and the second axial wireway 42 are equipped with the radially damping hole 361 that leads to axle core 50 outer surfaces; The lower end of the described second axial wireway 42 is also provided with outward extending the second radial guiding tracheae 43, and this second radial guiding tracheae 43 is provided with the axial damping hole 362 that leads to described axle core 50 support portion 51 upper surfaces; The first radial guiding tracheae 62 of described thrust bearing 60 is provided with the axial damping hole 362 that leads to described axle core 50 support portion 51 lower surfaces.
Described dead axle 70 is arranged in axle core 50 and is fixed on body 10, in dead axle 70, be provided with the cooling-water duct 71 that runs through dead axle 70 upper and lower surfaces, particularly, described cooling-water duct 71 comprises the secondary cooling-water duct 712 of being located at the main cooling water passage 711 on dead axle 70 central axis and being positioned at main cooling water passage 711 sides, and this pair cooling-water duct 712 is connected by hole for water spraying 72 with described cooling gap 75; Between the inner surface of the outer surface of this dead axle 70 and described axle core 50, be provided with the cooling gap 75 being connected with described cooling-water duct 71, these cooling gap 75 top seals, lower openings, particularly, described dead axle 70 lower ends are provided with outlet pipe 713, the upper end of outlet pipe 713 is communicated with main cooling water passage 711, and lower end stretches out in axle core 50 lower surfaces; Axle core 50 is inner is provided with the conical surface (not indicating in figure) near dead axle 70 lower surface places, the lower surface of this conical surface and dead axle 70 forms an accommodating cavity 73, this accommodating cavity 73 is connected mutually with the bottom in described cooling gap 75, and this accommodating cavity 73 is in communication with the outside by the gap between axle core 50 bottoms and outlet pipe 713 outer walls; In working order time, cooling water directly from outlet pipe 713 ejection, can carry out cooling along main cooling water passage 711 to the assembly such as cutter that is installed in electric main shaft below; Cooling water flows from top to bottom from secondary cooling-water duct 712, flow in cooling gap 75 by hole for water spraying 72 simultaneously, directly contact and lower the temperature with axle core 50 inwalls, the water flowing out from cooling gap 75 converges with the water flowing out from secondary cooling-water duct 712 straight at described accommodating cavity 73 again, finally from the gap ejection between axle core 50 and described outlet pipe 713, with spray the assemblies such as the cutter being installed on below electric main shaft together with the water main cooling water passage 711 central diameter direct currents converges on, can play the effect of the assemblies such as cooling cutter.
Particularly, the middle hypomere of described dead axle 70 outer surfaces cuts away one deck material and forms the groove (in figure do not indicate) of a cylinder shape, the described cooling gap 75 of the common formation of inwall of this groove and axle core 50; Between the diapire of this groove and described cooling-water duct 71, be provided with described hole for water spraying 72, when the work of this electricity main shaft, cooling water is injected in this cooling gap 75 from hole for water spraying 72, and then fills whole cooling gap 75, reaches the object of lowering the temperature to axle core 50 and dead axle 70; The ground of being worth mentioning, the groove that cylinder shape can also be established by cutting on axle core 50 inwalls in described cooling gap 75 forms, or on axle core 50 inwalls and dead axle 70 outer walls, all cuts and be provided with groove and jointly form cooling gap 75; 75 tops, cooling gap are sealed, and this design is for preventing that cooling water is toward this machine top leakage.
Preferably, the described axial damping hole 362 that leads to axle core 50 support portion 51 upper and lower surfaces is along being radially provided with at least two rows, be provided with altogether in the present embodiment the axial damping hole 362(of two rows as shown in the figure), this design of setting up many row's damping holes, can produce the gas film stiffness much larger than single damping hole, and then can guarantee that axle core 50 obtains larger axial support power, and make the control of upper-lower position of axle core 50 more stable, thus the precision while improving this electricity spindle processing; Be worth mentioning, by increasing the axial length of upper air-bearing 30 and lower air-bearing 40, increase the contact area of bearing and rotating shaft with this, increase this electricity main shaft diameter gas film stiffness upwards thereby reach, can make electric main shaft obtain more stable duty.
As mentioned above, a kind of high-speed air floatation electricity of the utility model main shaft is arranged on cooling-water duct 71 in dead axle 70, in the time of work, constantly directly spray cooling water to axle core 50 inwalls, cooling water and then be full of described cooling gap 75 and axle core 50 continued cooling, reaches the object that reduces axle core 50 temperature, and this cooling gap 75 is simple in structure, be easy to processing, and cooling water directly contacts with axle core 50, and cooling effectiveness is high, thereby guarantee that this electricity main shaft has the precision of better stability and Geng Gao.
To one skilled in the art, can be according to technical scheme described above and design, make other various corresponding changes and deformation, and within these all changes and deformation all should belong to the protection domain of the utility model claim.
Claims (8)
1. a high-speed air floatation electricity main shaft, it is characterized in that: comprise body, stator, upper air-bearing, lower air-bearing, axle core and dead axle, described stator is fixed on internal body, upper air-bearing and lower air-bearing are installed in respectively the upper and lower of stator, on axle core, be fixed with the rotor matching with stator, this axle core is arranged in the axially extending bore of stator, upper air-bearing and the formation of lower air-bearing, and described dead axle is arranged in axle in-core and is fixed on body; Wherein, described body, upper air-bearing and lower air-bearing are provided with the gas distribution channel of connection, and this gas distribution channel for producing the air film that this axle core is suspended between described axle core and the contact-making surface of upper and lower air-bearing; In described dead axle, be provided with the cooling-water duct that runs through dead axle, between the outer surface of dead axle and the inner surface of axle core, be provided with the cooling gap being connected with this cooling-water duct, this cooling gap top seal, lower openings.
2. a kind of high-speed air floatation electricity main shaft as claimed in claim 1, it is characterized in that: also comprise the thrust bearing of being located at lower air-bearing below, described axle core lower sides convex is provided with annular brace portion, and this support portion is inserted between lower air-bearing and thrust bearing.
3. a kind of high-speed air floatation electricity main shaft as claimed in claim 2, it is characterized in that: described gas distribution channel comprises main channel, the upper air supporting passage of being located at air-bearing inside be located in organism sidewall, be located at the lower air supporting passage of lower air-bearing inside and be located at the thrust air supporting passage of thrust bearing inside, on this, air supporting passage, lower air supporting passage and thrust air supporting passage are all communicated with main channel, and on this, air supporting passage, lower air supporting passage and thrust air supporting passage are equipped with the damping hole that leads to axle core outer surface.
4. a kind of high-speed air floatation electricity main shaft as claimed in claim 3, is characterized in that: described main channel is divided in organism sidewall and along axial perforation body; Described upper air supporting passage comprises the first annular air slot and is distributed in the several first axial wireway on this first annular air slot circumference; Described lower air supporting passage comprises the second annular air slot and is distributed in the several second axial wireway on this second annular air slot circumference; Described thrust air supporting passage comprises the 3rd annular air slot and is distributed in several the first radial guiding tracheaes on the 3rd annular air slot circumference.
5. a kind of high-speed air floatation electricity main shaft as claimed in claim 4, is characterized in that: the both ends up and down of the described first axial wireway and the second axial wireway are equipped with the radially damping hole that leads to axle core outer surface; The lower end of the described second axial wireway is also provided with the second radial guiding tracheae, and this second radial guiding tracheae is provided with the axial damping hole that leads to described axle core support portion upper surface; The first radial guiding tracheae of described thrust bearing is provided with the axial damping hole that leads to described axle core support portion lower surface.
6. a kind of high-speed air floatation electricity main shaft as claimed in claim 5, is characterized in that: described in lead to axle core support portion axial damping hole be radially provided with at least two rows.
7. a kind of high-speed air floatation electricity main shaft as claimed in claim 1, is characterized in that: described cooling-water duct comprises main cooling water passage and secondary cooling-water duct, and this pair cooling-water duct is connected by hole for water spraying with described cooling gap.
8. a kind of high-speed air floatation electricity main shaft as claimed in claim 7, it is characterized in that: described dead axle lower end is provided with the outlet pipe that is communicated with main cooling water passage, this outlet pipe stretches out in axle core lower surface, axle core inner is provided with the conical surface near dead axle lower surface place, the lower surface of this conical surface and dead axle forms an accommodating cavity, and this accommodating cavity is connected the bottom in described cooling gap and is in communication with the outside by the gap between outlet pipe and axle core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320740754.1U CN203599538U (en) | 2013-11-20 | 2013-11-20 | High-speed air floatation electric spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320740754.1U CN203599538U (en) | 2013-11-20 | 2013-11-20 | High-speed air floatation electric spindle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203599538U true CN203599538U (en) | 2014-05-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320740754.1U Withdrawn - After Issue CN203599538U (en) | 2013-11-20 | 2013-11-20 | High-speed air floatation electric spindle |
Country Status (1)
| Country | Link |
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| CN (1) | CN203599538U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103658690A (en) * | 2013-11-20 | 2014-03-26 | 广州市昊志机电股份有限公司 | High-speed air floatation electric main shaft |
| CN104551028A (en) * | 2015-02-06 | 2015-04-29 | 东莞市科隆电机有限公司 | Air floatation bearing and air floatation high-speed high-photoelectric main shaft |
| CN108044136A (en) * | 2018-01-02 | 2018-05-18 | 中国计量大学 | A kind of novel static pressure air-flotation electric spindle |
| CN112211907A (en) * | 2020-09-07 | 2021-01-12 | 东方电气集团东方汽轮机有限公司 | Turbine structure using electromagnetic bearings |
-
2013
- 2013-11-20 CN CN201320740754.1U patent/CN203599538U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103658690A (en) * | 2013-11-20 | 2014-03-26 | 广州市昊志机电股份有限公司 | High-speed air floatation electric main shaft |
| WO2015074403A1 (en) * | 2013-11-20 | 2015-05-28 | 广州市昊志机电股份有限公司 | A high-speed air-bearing electric spindle |
| CN103658690B (en) * | 2013-11-20 | 2016-08-17 | 广州市昊志机电股份有限公司 | A kind of high-speed air floatation electro spindle |
| CN104551028A (en) * | 2015-02-06 | 2015-04-29 | 东莞市科隆电机有限公司 | Air floatation bearing and air floatation high-speed high-photoelectric main shaft |
| CN108044136A (en) * | 2018-01-02 | 2018-05-18 | 中国计量大学 | A kind of novel static pressure air-flotation electric spindle |
| CN108044136B (en) * | 2018-01-02 | 2024-05-14 | 中国计量大学 | Novel static pressure air-float electric spindle |
| CN112211907A (en) * | 2020-09-07 | 2021-01-12 | 东方电气集团东方汽轮机有限公司 | Turbine structure using electromagnetic bearings |
| CN112211907B (en) * | 2020-09-07 | 2022-05-10 | 东方电气集团东方汽轮机有限公司 | Turbine structure using electromagnetic bearings |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140521 Effective date of abandoning: 20160817 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |