CN101217242A - An electric spindle design adopting electromagnetism anti-thrusting and electromagnetism radial bearing support - Google Patents
An electric spindle design adopting electromagnetism anti-thrusting and electromagnetism radial bearing support Download PDFInfo
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- CN101217242A CN101217242A CNA2008100490556A CN200810049055A CN101217242A CN 101217242 A CN101217242 A CN 101217242A CN A2008100490556 A CNA2008100490556 A CN A2008100490556A CN 200810049055 A CN200810049055 A CN 200810049055A CN 101217242 A CN101217242 A CN 101217242A
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- rotor
- electromagnetism
- rotating shaft
- shaft
- squirrel
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Abstract
The invention relates to an electric spindle design adopting an electromagnetic anti-thrust and an electromagnetic radial bearing support. According to the outline dimension limit and the stiffness requirement of the electric spindle, the two ends inside a shell (5) of the electric spindle is provided with an electromagnetic anti-thrust bearing (1), which eliminates the electromagnetic interference between the two ends, is beneficial for the design and concentration of the power supply line of the electromagnetic anti-thrust bearing and ensures the radial stiffness of a rotor-rotating shaft integrated shaft system (3). The two sides inside the electric spindle are symmetrically provided with an electromagnetic radial bearing (2) so as to support the shaft system (3). The symmetric electromagnetic radial bearings can reduce the vibration of the shaft system in the state of operation with super high speed and ensure the radial stiffness. The rotor-rotating shaft integrated shaft system makes the squirrel-cage bar of the rotor of the electric motor and the rotating shaft into the integrated structure and the corresponding position of a stator (4) arranged in the middle section and the shell of the electric spindle, that is the position of the squirrel-cage bar, adopts copper alloys directly welded in a groove to reduce the creep deformation of the squirrel-cage bar, reduce the vibration value of the shaft system and improve the power rate and the structural strength.
Description
Technical field
The invention belongs to electric spindle technology field, specially refer to a kind of electric main shaft design of adopting electromagnetism thrust and the supporting of electromagnetism journal bearing.
Background technology
In pcb board material boring processing industry, because the aperture of drilling is more and more small, production efficiency requires more and more higher, therefore in order to adapt to this needs, the rotating speed of PCB boring electricity consumption main shaft requires also more and more higher, and common PCB electricity main axle structure can not be suitable under the ultrahigh speed state, and the supporting of especially electric principle axis shafting and ultrahigh speed electric system no longer mate, this be because of:
1, because the DmN value of bearing is too high, and the sector requires electric main shaft can not adopt mist of oil or oil-air lubrication mode, so traditional rolling body bearing can not be suitable for;
2, traditional electrical spindle motor rotor adopts magnetic links cast aluminium structure, because the rotor surface linear velocity is too high, the structural strength and the conductance of aluminum alloy bar are low simultaneously, cause that easily rotor produces creep under the ultrahigh speed state, cause electric principle axis shafting vibration excessive, influence the crudy of main shaft.
Summary of the invention
In order to address the above problem, the present invention proposes a kind of electric main shaft design of adopting electromagnetism thrust and the supporting of electromagnetism journal bearing, solve PCB drilling machine electric spindle motor and under the ultrahigh speed state, moved the bottleneck problem that is run into.
For achieving the above object, the present invention has adopted following technical scheme:
The electric main shaft design of thrust of described employing electromagnetism and the supporting of electromagnetism journal bearing, at first the overall dimension according to electric main shaft limits and rigidity requirement, two ends configuration electromagnetism thrust bearing in electric main shaft housing, the two ends configuration can be eliminated the electromagnetic interference between the two electromagnetism thrust bearings, also help supply line's design of electromagnetism thrust bearing and concentrate the axial rigidity of assurance rotor-rotating shaft integral shaft system; Bilateral symmetry is furnished with the electromagnetism journal bearing in electric main shaft housing, with supporting rotor-rotating shaft integral shaft system, the electromagnetism journal bearing of symmetric arrangement can make electric main shaft reduce the vibration of rotor-rotating shaft integral shaft system under the ultrahigh speed running status, guarantees the radial rigidity that rotor-rotating shaft integral shaft is; Rotor-rotating shaft integral shaft system is that squirrel-cage bar and the rotating shaft with rotor is made as overall structure, the stator corresponding position of being installed in the Duan Yudian main shaft housing is the squirrel-cage bar place therein, adopt copper alloy directly to be welded in the groove of rotor-rotating shaft integral shaft system, to reduce the squirrel-cage bar deformation of creep, reduce the vibration values of rotor-rotating shaft integral shaft system, improve conductance and structural strength.
Owing to adopted technical scheme as mentioned above, the present invention has following superiority:
1, electric main axle structure is comparatively simple, and bearing need not to lubricate, and does not have wearing and tearing forever, can be in the whole life span of main shaft Maintenance free;
2, electric mainshaft bearing processing is simple, and the main shaft integral rigidity can be adjusted flexibly according to actual needs;
3, the electric spindle motor rotor performance is good, and processing technology is simple, and the whole dynamic balance accuracy of axle system can be accomplished very high level;
4, adopt the inner space that rotor-rotating shaft integral structure can the maximum using rotating shaft, install in the rotating shaft tool-broaching mechanism be not subjected in the restriction of hole dimension.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among Fig. 1: 1-electromagnetism thrust bearing; 2-electromagnetism journal bearing; 3-rotor-rotating shaft integral shaft system; The 4-stator; 5-electricity main shaft housing.
Embodiment
As shown in Figure 1, the electric main shaft design of employing electromagnetism of the present invention thrust and the supporting of electromagnetism journal bearing, overall dimension restriction and rigidity requirement according to electric main shaft, two ends configuration electromagnetism thrust bearing (1) in electric main shaft housing (5), the two ends configuration can be eliminated the electromagnetic interference between the two electromagnetism thrust bearings (1), also help supply line's design of electromagnetism thrust bearing (1) and concentrate the axial rigidity of assurance rotor-rotating shaft integral shaft system (3); Bilateral symmetry is furnished with electromagnetism journal bearing (2) in electric main shaft housing (5), with supporting rotor-rotating shaft integral shaft system (3), the electromagnetism journal bearing (2) of symmetric arrangement can make electric main shaft reduce the vibration of rotor-rotating shaft integral shaft system (3) under the ultrahigh speed running status, guarantees that rotor-rotating shaft integral shaft is the radial rigidity of (3); Rotor-rotating shaft integral shaft system (3) is that squirrel-cage bar and the rotating shaft with rotor is made as overall structure, stator (4) corresponding position of being installed in the Duan Yudian main shaft housing is the squirrel-cage bar place therein, adopt copper alloy directly to be welded in the groove of rotor-rotating shaft integral shaft system (3), to reduce the squirrel-cage bar deformation of creep, reduce the vibration values of rotor-rotating shaft integral shaft system (3), improve conductance and structural strength.
Main electromagnetism thrust bearing (1) and journal bearing (2) supporting rotor-rotating shaft integral shaft system (3) of adopting of design, the DmN value that breaks through electric mainshaft bearing limits, and satisfies the hole ultrahigh rotating speed requirement of dynamo-electric main shaft of PCB.Processing need not carried out in having the environment of contaminated with oil mist because PCB holes simultaneously, after adopting electromagnetism thrust bearing (1) and journal bearing (2) support pattern, bearing need not to lubricate, and does not have any noxious emission, all pollution-free to environment and pcb board, satisfied the environmental requirement of PCB boring processing.And rotor-rotating shaft integral shaft system (3), make rotor and rotating shaft really realize one, the change motor to the squirrel-cage bar deformation of creep, has reduced the vibration values of electric spindle motor under ultrahigh rotating speed under the ultrahigh speed state, make electric main shaft work more steady, crudy is protected.And squirrel-cage bar can also improve conductance and structural strength owing to adopt copper alloy.
The present invention only relates to layout type and rotor-rotating shaft integral shaft system of the bearing that adopted and bearing, does not change other version of electric main shaft, so other design of electric main shaft repeats no more.
Claims (1)
1. electric main shaft design of adopting electromagnetism thrust and the supporting of electromagnetism journal bearing, it is characterized in that: the overall dimension restriction and the rigidity requirement of this design consideration electricity main shaft, two ends configuration electromagnetism thrust bearing (1) in electric main shaft housing (5), the two ends configuration can be eliminated the electromagnetic interference between the two electromagnetism thrust bearings (1), also help supply line's design of electromagnetism thrust bearing (1) and concentrate the axial rigidity of assurance rotor-rotating shaft integral shaft system (3); Bilateral symmetry is furnished with electromagnetism journal bearing (2) in electric main shaft housing (5), with supporting rotor-rotating shaft integral shaft system (3), the electromagnetism journal bearing (2) of symmetric arrangement can make electric main shaft reduce the vibration of rotor-rotating shaft integral shaft system (3) under the ultrahigh speed running status, guarantees that rotor-rotating shaft integral shaft is the radial rigidity of (3); Rotor-rotating shaft integral shaft system (3) is that squirrel-cage bar and the rotating shaft with rotor is made as overall structure, stator (4) corresponding position of being installed in the Duan Yudian main shaft housing is the squirrel-cage bar place therein, adopt copper alloy directly to be welded in the groove of rotor-rotating shaft integral shaft system (3), to reduce the squirrel-cage bar deformation of creep, reduce the vibration values of rotor-rotating shaft integral shaft system (3), improve conductance and structural strength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100490556A CN101217242A (en) | 2008-01-04 | 2008-01-04 | An electric spindle design adopting electromagnetism anti-thrusting and electromagnetism radial bearing support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100490556A CN101217242A (en) | 2008-01-04 | 2008-01-04 | An electric spindle design adopting electromagnetism anti-thrusting and electromagnetism radial bearing support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101217242A true CN101217242A (en) | 2008-07-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100490556A Pending CN101217242A (en) | 2008-01-04 | 2008-01-04 | An electric spindle design adopting electromagnetism anti-thrusting and electromagnetism radial bearing support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101217242A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035326A (en) * | 2009-09-30 | 2011-04-27 | 株式会社日立制作所 | Squirrel-cage rotor for electric motor and production method therefor |
-
2008
- 2008-01-04 CN CNA2008100490556A patent/CN101217242A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035326A (en) * | 2009-09-30 | 2011-04-27 | 株式会社日立制作所 | Squirrel-cage rotor for electric motor and production method therefor |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080709 |