CN203934270U - Shielding through wall device and the shield electric machine of rotating shaft - Google Patents
Shielding through wall device and the shield electric machine of rotating shaft Download PDFInfo
- Publication number
- CN203934270U CN203934270U CN201420181754.7U CN201420181754U CN203934270U CN 203934270 U CN203934270 U CN 203934270U CN 201420181754 U CN201420181754 U CN 201420181754U CN 203934270 U CN203934270 U CN 203934270U
- Authority
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- China
- Prior art keywords
- rotating shaft
- shielding
- shell
- motion block
- wall device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000012216 screening Methods 0.000 claims abstract description 13
- 238000013016 damping Methods 0.000 claims abstract description 7
- 235000014676 Phragmites communis Nutrition 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 6
- 210000002421 cell wall Anatomy 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 244000089486 Phragmites australis subsp australis Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Motor Or Generator Frames (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
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.The invention also discloses a kind of shield electric machine, can meet the requirement of screening effectiveness 50dB.
Description
Technical field
The utility model belong 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
Antenna effect due to 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.
Utility model content
The purpose of this utility model is to provide a kind of shielding through wall device and shield electric machine of rotating shaft, to solve above-mentioned existing screening arrangement, cannot realize the problem that metal shaft shielded wall.
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, it is formed continuously and be electrically connected to, 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 utility model also relates to a kind of 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; 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, forms continuously it and is electrically connected to, and prevents electromagnetic-wave leakage.
The beneficial effects of the utility model are:
1, the utility model 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 utility model, 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.
Accompanying drawing explanation
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 utility model is elaborated.
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, it is formed continuously and be electrically connected to, 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, the impedance that groove can change rotating shaft is set, and electromagnetic wave is along straightline propagation, thereby more energy is transferred to, transmits decay 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 utility model also relates to a kind of shield electric machine, as shown in Figure 3, comprises motor, wraps 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 rotating shaft 1 through the opening part of 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, forms continuously it and is electrically connected to, and prevents electromagnetic-wave leakage.
The utility model is installed on the shielding wallboard for the shield shell of shielded motor, when 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 utility model meets the requirement of screening effectiveness 50dB, and through wall device is installed after rotating shaft installation, convenient and reliable while guaranteeing maintenance motor and shaft coupling.
Through wall device running of the present utility model (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, forms continuously it and is electrically connected to, and 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, forms continuously it and is electrically connected to, and prevents electromagnetic-wave leakage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420181754.7U CN203934270U (en) | 2014-04-15 | 2014-04-15 | Shielding through wall device and the shield electric machine of rotating shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420181754.7U CN203934270U (en) | 2014-04-15 | 2014-04-15 | Shielding through wall device and the shield electric machine of rotating shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203934270U true CN203934270U (en) | 2014-11-05 |
Family
ID=51830011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420181754.7U Expired - Lifetime CN203934270U (en) | 2014-04-15 | 2014-04-15 | Shielding through wall device and the shield electric machine of rotating shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203934270U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103906422A (en) * | 2014-04-15 | 2014-07-02 | 安方高科电磁安全技术(北京)有限公司 | Shield wall-penetrating device for rotary shaft and canned motor |
| CN107864602A (en) * | 2017-10-11 | 2018-03-30 | 北京无线电计量测试研究所 | A kind of reverberation chamber wall-through motor and screen method |
-
2014
- 2014-04-15 CN CN201420181754.7U patent/CN203934270U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103906422A (en) * | 2014-04-15 | 2014-07-02 | 安方高科电磁安全技术(北京)有限公司 | Shield wall-penetrating device for rotary shaft and canned motor |
| CN103906422B (en) * | 2014-04-15 | 2017-05-24 | 安方高科电磁安全技术(北京)有限公司 | Shield wall-penetrating device for rotary shaft and canned motor |
| CN107864602A (en) * | 2017-10-11 | 2018-03-30 | 北京无线电计量测试研究所 | A kind of reverberation chamber wall-through motor and screen method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141105 |