CN103906422A - Shield wall-penetrating device for rotary shaft and canned motor - Google Patents
Shield wall-penetrating device for rotary shaft and canned motor Download PDFInfo
- Publication number
- CN103906422A CN103906422A CN201410150455.1A CN201410150455A CN103906422A CN 103906422 A CN103906422 A CN 103906422A CN 201410150455 A CN201410150455 A CN 201410150455A CN 103906422 A CN103906422 A CN 103906422A
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- shielding
- rotating shaft
- shell
- motion block
- connecting plate
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Abstract
A shield wall-penetrating device for a rotary shaft relates to the rotary shaft, an annular movable block arranged on the rotary shaft in a sleeved mode, and an annular fixed block, wherein a choke groove with a comb-shaped cross section is formed in the outer side of the movable block, the cross section of the fixed block is in the shape of comb teeth and is combined with the comb teeth of the choke groove in a buckled mode to achieve non-contact connection, the movable block rotates along with the rotary shaft, and the comb teeth of the movable block and the comb teeth of the fixed block form an electromagnetic wave transmission attenuation circuit. The invention further discloses a canned motor which can meet the requirement for 50dB shielding effectiveness.
Description
Technical field
The invention belongs to rotating shaft shielding wall field, relate in particular to a kind of shielding through wall device and shield electric machine of rotating shaft.
Background technology
Due to the antenna effect of metallic object, in order to reach shield effectiveness, conventionally require metallic object can not pass shield, but in actual demand, as power transmission, motor is arranged in shield shell, and its power transmission shaft need be through the shielding wallboard of shield shell, and can not leak electromagnetic radiation, to prevent from affecting the normal safe operation of external equipment.
Summary of the invention
The object of the present invention is to provide a kind of shielding through wall device and shield electric machine of rotating shaft, cannot realize metal shaft and shielded the problem of wall to solve above-mentioned existing screening arrangement.
Technical scheme is as follows:
A shielding through wall device for rotating shaft, comprises rotating shaft;
The motion block of ring-type, is set in described rotating shaft, and its outside offers the choke groove that section is pectination;
Ring-type determine piece, its section is comb teeth-shaped, is interlocked with the broach of described choke groove, forms noncontact and connects;
Described motion block rotates with described rotating shaft, and the broach of described motion block and the described broach of determining piece form electromagnetic wave and transmit surge damping circuit.
Further: also to comprise: shell, its two ends offer through hole, and described rotating shaft is through described shell, describedly determines piece and is fixed in described shell; Two bearings, are set in described rotating shaft, lay respectively at described through hole, are connected with described shell.
Further: also to comprise: shielding connecting plate, for connecting described shell and shield shell, make it form electrical connection continuously, prevent electromagnetic-wave leakage.
Further: also to comprise: to determine piece connecting plate, be fixed on described shell, for connecting described shielding connecting plate.
Further: also to comprise: shielding gasket, for sealing described gap of determining between piece connecting plate and described shielding connecting plate; Described shielding gasket is the mesh liner by metal wire knitted.
Further: each parts of described shielding through wall device are conductive material.
Further: also to comprise: for connecting the spring film trap of described shield shell and described shielding connecting plate, two medial surfaces that its cell wall is relative are provided with reed, described shielding connecting plate inserts in described spring film trap, and its two sides contacts with described reed, and realization is connected with described shield shell.
Further: the periphery of described rotating shaft offers groove, described motion block is stuck in described groove, makes described motion block in axial location.
The invention still further relates to a kind of shield electric machine, comprise the screening can of motor, rotating shaft and the described motor of parcel, described rotating shaft is through described screening can; Also comprise: the motion block of ring-type, be set in described rotating shaft, its outside offers the choke groove that section is pectination; Ring-type determine piece, its section is comb teeth-shaped, is interlocked with the broach of described choke groove, forms noncontact and connects; Described motion block rotates with described rotating shaft, and the broach of described motion block and the described broach of determining piece form electromagnetic wave and transmit surge damping circuit.
Further: also to comprise: shell, be located at described rotating shaft through the opening part of screening can, its two ends offer through hole, and described rotating shaft is through described shell, describedly determines piece and is fixed in described shell; Two bearings, are set in described rotating shaft, lay respectively at described through hole, are connected with described shell; Shielding connecting plate, for connecting described shell and described shield shell, makes it form electrical connection continuously, prevents electromagnetic-wave leakage.
The invention has the beneficial effects as follows:
1, the present invention is by motion block being set and determining piece, and the broach of motion block and the broach formation loop of determining piece, make electromagnetic wave in loop, reflect, decay, thereby blocking-up electromagnetic wave transmits vertically.
2, the present invention, by shell is set, forms continuous electrical connection with shield shell, thereby stops electromagnetic leakage, and by the earthing of casing, electromagnetic wave is delivered to ground.
Brief description of the drawings
Fig. 1 is the cross-sectional view of the shielding through wall device of optional embodiment shaft;
Fig. 2 is the partial enlarged drawing at A place in Fig. 1 view;
Fig. 3 is the cross-sectional view of the shield electric machine in optional embodiment.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
As shown in Figure 1, the shielding through wall device of a kind of rotating shaft in illustrative embodiment, comprising: the motion block 5 of rotating shaft 1, ring-type, ring-type determine piece 6; The motion block 5 of ring-type, is set in rotating shaft 1, and its outside offers the choke groove that section is pectination; Ring-type determine piece 6, its section is comb teeth-shaped, is interlocked with the broach of choke groove, forms noncontact and connects; Motion block rotates with rotating shaft, and the broach of motion block forms electromagnetic wave with the broach of determining piece and transmits surge damping circuit.
Electromagnetic wave is conventionally along the outer wall transmission of rotating shaft, and the broach of motion block 5 and the broach formation loop of determining piece 6, because the impedance in gap is not identical with the impedance of metal, when electromagnetic wave is propagated in loop, have decay significantly, thereby block electromagnetic transmission.
The shielding through wall device of the rotating shaft in illustrative embodiment, also comprises: shell 2 and bearing 3, and shell 2, its two ends offer through hole, and rotating shaft 1, through shell 2, is determined piece 6 and is fixed in shell 2; Two bearings 3, are set in rotating shaft 1, lay respectively at through hole, are connected with shell 2.
The shielding through wall device of the rotating shaft in illustrative embodiment, also comprises: shielding connecting plate 4, and for connected with outer casing 2 and shield shell 10, make it form electrical connection continuously, prevent electromagnetic-wave leakage.
Preferably, described bearing 3 is sealed bearing.
Preferably, on bearing 3, also fasten and have bearing cap 31.
First by electromagnetic wave shielding in the shell 2 of ground connection, shielding connecting plate 4 make shell 2 and shield shell form continuous electrical connection, one side prevent from the other hand electromagnetic wave being delivered to ground by electromagnetic-wave leakage.
Preferably, the periphery of rotating shaft 1 offers groove, and motion block is stuck in groove, makes motion block 5 in axial location, meanwhile, groove is set can changes the impedance of rotating shaft, and electromagnetic wave is along straightline propagation, transmits decay thereby more energy is transferred on motion block.
In order to prevent welding deformation, and easy to process, and the shielding through wall device of the rotating shaft in illustrative embodiment, also comprises: determine piece connecting plate 7, piece 6 is corresponding with determining, and is fixed on shell 2, for connecting shielding connecting plate 4.Preferably, determine to be provided with shielding gasket between piece connecting plate 7 and shielding connecting plate 4, for sealing off gap, shielding gasket is the netted soft cushioning by metal wire knitted.
As shown in Figure 2, the shielding through wall device of the rotating shaft in illustrative embodiment, also comprise: for connecting the spring film trap 8 that shields wallboard 10, two medial surfaces that its cell wall is relative are provided with reed 81, and reed 81 is circular arc, and the convex surface of two reeds 81 is positioned opposite, making to shield connecting plate 4 inserts in described spring film trap 8, its two sides and reed 81 close contacts, thus realize being connected of shielding connecting plate 4 and shield shell, and this structure is convenient to remove and install.
Preferably, each parts of shielding through wall device are conductive material, preferably conducting metal.
The shielding through wall device of the rotating shaft in illustrative embodiment, also comprises: supporting seat, is connected with shielding connecting plate, for supporting shielding through wall device.
The invention still further relates to a kind of shield electric machine, as shown in Figure 3, comprise motor, wrap up the screening can 10 of described motor, and the shielding through wall device of above-mentioned rotating shaft, rotating shaft 1 is through screening can 10, the motion block 5 of ring-type, be set in rotating shaft 1, its outside offers the choke groove that section is pectination; Ring-type determine piece 6, its section is comb teeth-shaped, is interlocked with the broach of choke groove, forms noncontact and connects; Motion block rotates with rotating shaft, and the broach of motion block forms electromagnetic wave with the broach of determining piece and transmits surge damping circuit.
Shield electric machine in illustrative embodiment, also comprises: shell 2, bearing 3 and shielding connecting plate 4; Shell 2, is located at the opening part of rotating shaft 1 through screening can 10, and its two ends offer through hole, and rotating shaft 1, through shell 2, is determined piece 6 and is fixed in shell 2; Two bearings 3, are set in rotating shaft 1, lay respectively at through hole, are connected with shell 2.Shielding connecting plate 4, for connected with outer casing 2 and shield shell 10, makes it form electrical connection continuously, prevents electromagnetic-wave leakage.
The present invention is installed on the shielding wallboard for the shield shell of shielded motor, in the time that rotating shaft is rotated, motion block rotates with rotating shaft, shell, determine piece etc. and keep static, space radiation in shell stops by continuous electrical connection theing form with shield shell like this, cannot arrive outside shielded enclosure, the electromagnetism of conduction on shell eliminated by ground connection, and the electromagnetism of conduction in rotating shaft is by motion block with determine decay elimination in loop that piece forms.
Through wall device of the present invention meets the requirement of screening effectiveness 50dB, and through wall device is installed after rotating shaft installation, convenient and reliable while ensureing maintenance motor and shaft coupling.
Through wall device running of the present invention (1200 revs/min of rotating speeds) is after 100 hours, and mechanical structure does not have fault, operates steadily; After preliminary survey and running, the screening effectiveness of test does not significantly decrease, and the stable performance of this device is described.
Claims (10)
1. a shielding through wall device for rotating shaft, comprises rotating shaft; It is characterized in that, also comprise:
The motion block of ring-type, is set in described rotating shaft, and its outside offers the choke groove that section is pectination;
Ring-type determine piece, its section is comb teeth-shaped, is interlocked with the broach of described choke groove, forms noncontact and connects;
Described motion block rotates with described rotating shaft, and the broach of described motion block and the described broach of determining piece form electromagnetic wave and transmit surge damping circuit.
2. shielding through wall device as claimed in claim 1, is characterized in that, also comprises:
Shell, its two ends offer through hole, and described rotating shaft is through described shell, describedly determines piece and is fixed in described shell;
Two bearings, are set in described rotating shaft, lay respectively at described through hole, are connected with described shell.
3. shielding through wall device as claimed in claim 2, is characterized in that, also comprises:
Shielding connecting plate, for connecting described shell and shield shell, makes it form electrical connection continuously, prevents electromagnetic-wave leakage.
4. shielding through wall device as claimed in claim 3, is characterized in that, also comprises: determine piece connecting plate, be fixed on described shell, for connecting described shielding connecting plate.
5. shielding through wall device as claimed in claim 4, is characterized in that, also comprises: shielding gasket, for sealing described gap of determining between piece connecting plate and described shielding connecting plate; Described shielding gasket is the mesh liner by metal wire knitted.
6. shielding through wall device as claimed in claim 5, is characterized in that, each parts of described shielding through wall device are conductive material.
7. the shielding through wall device as described in claim 3～6 any one claim, it is characterized in that, also comprise: for connecting the spring film trap of described shield shell and described shielding connecting plate, two medial surfaces that its cell wall is relative are provided with reed, described shielding connecting plate inserts in described spring film trap, its two sides contacts with described reed, and realization is connected with described shield shell.
8. shielding through wall device as claimed in claim 1, is characterized in that, the periphery of described rotating shaft offers groove, and described motion block is stuck in described groove, makes described motion block in axial location.
9. a shield electric machine, comprises the screening can of motor, rotating shaft and the described motor of parcel, and described rotating shaft is through described screening can; It is characterized in that, also comprise:
The motion block of ring-type, is set in described rotating shaft, and its outside offers the choke groove that section is pectination;
Ring-type determine piece, its section is comb teeth-shaped, is interlocked with the broach of described choke groove, forms noncontact and connects;
Described motion block rotates with described rotating shaft, and the broach of described motion block and the described broach of determining piece form electromagnetic wave and transmit surge damping circuit.
10. shield electric machine as claimed in claim 9, is characterized in that, also comprises:
Shell, is located at described rotating shaft through the opening part of screening can, and its two ends offer through hole, and described rotating shaft is through described shell, describedly determines piece and is fixed in described shell;
Two bearings, are set in described rotating shaft, lay respectively at described through hole, are connected with described shell;
Shielding connecting plate, for connecting described shell and described shield shell, makes it form electrical connection continuously, prevents electromagnetic-wave leakage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410150455.1A CN103906422B (en) | 2014-04-15 | 2014-04-15 | Shield wall-penetrating device for rotary shaft and canned motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410150455.1A CN103906422B (en) | 2014-04-15 | 2014-04-15 | Shield wall-penetrating device for rotary shaft and canned motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103906422A true CN103906422A (en) | 2014-07-02 |
| CN103906422B CN103906422B (en) | 2017-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410150455.1A Active CN103906422B (en) | 2014-04-15 | 2014-04-15 | Shield wall-penetrating device for rotary shaft and canned motor |
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| CN (1) | CN103906422B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106714540A (en) * | 2017-01-10 | 2017-05-24 | 中国科学院国家天文台 | Electromagnetic protection structure of driving rod member |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002081271A (en) * | 2000-09-07 | 2002-03-22 | Takenaka Komuten Co Ltd | Knob structure of electromagnetic wave shielding door |
| US20080218749A1 (en) * | 2007-03-05 | 2008-09-11 | Systems On Silicon Manufacturing Co. Pte. Ltd. | Metal comb structures, methods for their fabrication and failure analysis |
| CN102209856A (en) * | 2008-11-14 | 2011-10-05 | 东芝三菱电机产业系统株式会社 | Power transmission device |
| CN102879655A (en) * | 2012-10-31 | 2013-01-16 | 南京信息工程大学 | Vibrating micro mechanical electric field sensor |
| CN103354400A (en) * | 2013-07-22 | 2013-10-16 | 大连华锐重工集团股份有限公司 | Electromagnetic leakage prevention rotating shaft wall apparatus |
| CN203934270U (en) * | 2014-04-15 | 2014-11-05 | 安方高科电磁安全技术(北京)有限公司 | Shielding through wall device and the shield electric machine of rotating shaft |
-
2014
- 2014-04-15 CN CN201410150455.1A patent/CN103906422B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002081271A (en) * | 2000-09-07 | 2002-03-22 | Takenaka Komuten Co Ltd | Knob structure of electromagnetic wave shielding door |
| US20080218749A1 (en) * | 2007-03-05 | 2008-09-11 | Systems On Silicon Manufacturing Co. Pte. Ltd. | Metal comb structures, methods for their fabrication and failure analysis |
| CN102209856A (en) * | 2008-11-14 | 2011-10-05 | 东芝三菱电机产业系统株式会社 | Power transmission device |
| CN102879655A (en) * | 2012-10-31 | 2013-01-16 | 南京信息工程大学 | Vibrating micro mechanical electric field sensor |
| CN103354400A (en) * | 2013-07-22 | 2013-10-16 | 大连华锐重工集团股份有限公司 | Electromagnetic leakage prevention rotating shaft wall apparatus |
| CN203934270U (en) * | 2014-04-15 | 2014-11-05 | 安方高科电磁安全技术(北京)有限公司 | Shielding through wall device and the shield electric machine of rotating shaft |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106714540A (en) * | 2017-01-10 | 2017-05-24 | 中国科学院国家天文台 | Electromagnetic protection structure of driving rod member |
| CN106714540B (en) * | 2017-01-10 | 2023-07-04 | 中国科学院国家天文台 | Electromagnetic protection structure of driving rod piece |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103906422B (en) | 2017-05-24 |
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