阅读说明：本技术 一种电磁屏蔽高速长轴 (Electromagnetic shielding high-speed long shaft ) 是由 陈春水 张余斌 布图格奇 于 2020-04-28 设计创作，主要内容包括：本发明公开了一种电磁屏蔽高速长轴,可以解决传统的电磁兼容测功试验中穿墙长轴电磁屏蔽效能不好,且传统穿墙长轴和暗室金属屏蔽墙体的封闭式刚性连接导致屏蔽墙体和长轴共振,噪声大,影响穿墙长轴的高速传动性能和寿命。包括两段轴套和内部的旋转轴、支撑轴套的支撑座、安装轴套及其支撑座的底座、底座的绝缘减震垫、长轴外部轴套和内部旋转轴的屏蔽结构,以及轴套与屏蔽墙体的屏蔽结构。电磁屏蔽高速长轴在15000rpm、1000Nm的高速重载情况下能保持良好的屏蔽效能、改善长轴的振动和屏蔽墙体的共振、提高长轴的使用性能和使用寿命。(The invention discloses an electromagnetic shielding high-speed long shaft, which can solve the problems that the electromagnetic shielding efficiency of a traditional through-wall long shaft in an electromagnetic compatibility dynamometer test is poor, and the resonance between the shielding wall and the long shaft and the high noise are caused by the closed rigid connection between the traditional through-wall long shaft and a darkroom metal shielding wall, so that the high-speed transmission performance and the service life of the through-wall long shaft are influenced. The shielding structure comprises two sections of shaft sleeves, an internal rotating shaft, a supporting seat for supporting the shaft sleeves, a base for mounting the shaft sleeves and the supporting seat, an insulating shock pad of the base, a shielding structure for the external shaft sleeve and the internal rotating shaft of the long shaft, and a shielding structure for the shaft sleeves and a shielding wall. The electromagnetic shielding high-speed long shaft can keep good shielding efficiency under the conditions of 15000rpm and 1000Nm high-speed heavy load, improve the vibration of the long shaft and the resonance of a shielding wall body, and improve the service performance and the service life of the long shaft.)

1. An electromagnetic shielding high-speed long shaft comprises a long shaft shell consisting of two sections of shaft sleeves (10), one end of each shaft sleeve (10) is supported by one end supporting seat (7), the other end of each shaft sleeve (10) is supported by one middle supporting seat (20) and the other end supporting seat (7), a rotating shaft (11) and a high-speed bearing (17) for supporting the rotating shaft (11) are arranged inside each two sections of shaft sleeves (10), end covers (9) for improving the sealing performance of the long shaft are arranged at the ends of the two sections of shaft sleeves (10), each shaft sleeve (10) penetrates through a metal shielding wall body (14) of a darkroom, one end supporting seat (7) is arranged on a single-seat base (6) and is positioned outside the darkroom, and the other end supporting seat (7) and the middle supporting seat (20) are arranged on a double-seat base (21) and are positioned inside the darkroom, install labyrinth ring (18) and electrically conductive brush (19) between axle sleeve (10) and rotation axis (11), rotation axis (11) tip installation insulation shaft coupling (8), shield flange (16) are installed to the position of wearing the wall of axle sleeve (10), shielding dish (12) are installed to the position of wearing the wall of metallic shield wall body (14), install between shield flange (16) and shielding dish (12) and inhale ripples cotton (13) and electrically conductive net (15), insulating vibration damping bottom plate (1), insulating vibration damping gasket (3) and metal gasket (4) that are made by insulating damping material are all installed to the position of the connection outside part of single seat base (6) and double seat base (21), insulating vibration damping bottom plate (1) is installed between single seat base (6) and outside part, isolated outside electromagnetic interference, insulating vibration damping gasket (3) are installed between single seat base (6) and metal gasket (4), screw (5) pass metal gasket (4), insulating shock-absorbing gasket (3), single seat base (6) and insulating vibration damping mount (1) and twist outside part to fixed single seat base (6), metal gasket (4) can prevent that screw (5) direct contact from twisting bad insulating shock-absorbing gasket (3), the cover has on screw (5) with screw (5) and isolated high frequency insulating tube (2) of single seat base (6).

2. The electromagnetically shielded high-speed long shaft according to claim 1, wherein a labyrinth ring (18) and a conductive brush (19) are installed between the sleeve (10) and the rotating shaft (11).

3. The electromagnetic shielding high-speed long shaft according to claim 1, wherein a shielding flange (16) and a shielding disc (12) are installed at a wall penetrating position between the shaft sleeve (10) and the metal shielding wall (14), a conductive net (15) is installed between the shielding flange (16) and the shielding disc (12), a waveguide labyrinth is arranged and filled with wave absorbing cotton (13), the shielding flange (16) is installed at the wall penetrating position of the shaft sleeve (10), the shielding flange (16) is electrically connected with the shaft sleeve (10), the shielding disc (12) is installed at the wall penetrating position of the metal shielding wall (14), the metal shielding wall (14) is electrically connected with the shielding disc (12) in the same manner, the shielding flange (16) is connected with the shielding disc (12) through the conductive net (15), and the shielding flange (16) is in soft connection with the shielding disc (12).

4. The electromagnetically shielded high-speed shaft as claimed in claim 1, wherein an insulating coupling (8) for insulating and connecting an external input/output shaft is installed at an end of the rotating shaft (11).

5. The electromagnetically shielded high-speed long shaft according to claim 1, wherein the shielding flange (16), the shielding disc (12), the wave-absorbing cotton (13) and the conductive mesh (15) are vertically arranged along the radial direction between the shaft sleeve (10) and the metal shielding wall (14), and the shaft sleeve can be horizontally arranged along the axial direction or combined by installing high-conductivity, high-permeability and wave-absorbing materials.

Technical Field

The invention relates to electromagnetic shielding high-speed long shaft transmission in an electromagnetic compatibility dynamometer test, in particular to an electromagnetic shielding high-speed long shaft, and belongs to the field of high-speed long shafts.

Background

In an electromagnetic compatibility dynamometer test, the power outside a darkroom needs to be transmitted to a tested piece in the darkroom through a high-speed long shaft meeting the electromagnetic shielding effect. The traditional ball cage universal coupling is difficult to realize long-distance and high-speed power transmission. The carbon fiber long shaft transmission can improve the long-distance and high-speed power transmission, but the manufacturing cost is higher, and the large torque transmission and the compact structure cannot be considered, so that the opening of the metal shielding wall body of the darkroom penetrating through the wall is larger, and the shielding efficiency is poorer. The metal rigid long shaft capable of simultaneously meeting the requirements of long-distance, high-speed and large-torque transmission is used for realizing better shielding efficiency, so that the rigid long shaft and a darkroom metal shielding wall body are in closed rigid connection, the length of the rigid long shaft is increased for improving the length of a waveguide, and the resonance of the metal shielding wall body and the long shaft is caused at high rotating speed. Meanwhile, the rigid long shaft is fixedly installed without a damping design, so that the vibration of the long shaft and the metal shielding wall is large, the operation noise is large, the shielding efficiency is influenced, the installation and the use performance of the wave-absorbing material in the darkroom are influenced, and the transmission performance and the service life of the long shaft are reduced.

Disclosure of Invention

The invention aims to provide an electromagnetic shielding high-speed long shaft, which realizes good shielding efficiency under the running condition of long distance, high speed and large torque in an electromagnetic compatibility dynamometer test and solves the problems of large vibration and poor shielding efficiency of the traditional through-wall long shaft.

Therefore, the invention is realized by the following technical scheme:

a high-speed long shaft of electromagnetic shield, include the long shaft shell that two sections axle sleeves are made up, one end of said axle sleeve is supported by an end supporting seat, the other end is supported by intermediate strut and end supporting seat, three supporting seats are supported, improve the rigidity of the long shaft shell, said two sections axle sleeves are internally equipped with the rotating shaft and high-speed bearing supporting the rotating shaft, said axle sleeve end is equipped with the end cap, improve the sealing property of the long shaft, said axle sleeve passes the metal shielding wall of the darkroom, said end supporting seat is installed on the single base and is located outside the darkroom, said end supporting seat and intermediate strut are installed on the double base and are located inside the darkroom, said axle sleeve and rotating shaft are equipped with the labyrinth ring and the conductive brush, said rotating shaft end is equipped with the insulating coupling, said axle sleeve is equipped with the shielding flange at the wall-through, install between shielding flange and the shielding dish and inhale ripples cotton and electrically conductive net, insulating vibration damping mount, insulating shock attenuation gasket and metal gasket are all installed to the position of the connection outside part of single seat base and double-seat base, insulating shock damping mount installs between single seat base and outside part, isolated outside electromagnetic interference, insulating shock attenuation gasket installs between single seat base and metal gasket, and the screw passes metal gasket, insulating shock attenuation gasket, single seat base and insulating shock damping mount and twists outside part to fixed single seat base, metal gasket can prevent that screw direct contact from twisting bad insulating shock attenuation gasket, the cover has high frequency insulating tube on the screw, and is isolated with screw and single seat base.

Preferably, a labyrinth ring and a conductive brush are mounted between the shaft sleeve and the rotating shaft.

Preferably, a shielding flange and a shielding disc are arranged at the wall penetrating position between the shaft sleeve and the metal shielding wall body, a conductive net is arranged between the shielding flange and the shielding disc, and a waveguide labyrinth is arranged and filled with wave-absorbing cotton.

Preferably, the end supporting seat and the intermediate supporting seat are arranged on the single base and the double bases, the insulating damping bottom plate is arranged between the single base and the double bases and between the single base and the external part to isolate external electromagnetic interference, the insulating damping gasket is arranged between the single base and the metal gasket, the screw penetrates through the metal gasket, the insulating damping gasket, the single base and the insulating damping bottom plate to be screwed to the external part, so that the single base is fixed, the insulating damping gasket and the insulating damping bottom plate are made of special insulating damping materials and can effectively attenuate vibration of a long shaft, the metal gasket can prevent the screw from being directly contacted to damage the insulating damping gasket, the screw is sleeved with the high-frequency insulating tube and isolated from the single base.

Preferably, an insulating coupling is attached to an end of the rotating shaft to insulate and connect the external input/output shaft.

Preferably, the shielding mode of the shielding flange, the shielding disc, the wave-absorbing cotton and the conductive net vertically arranged along the radial direction can be adopted between the shaft sleeve and the metal shielding wall body, the mode of horizontal arrangement along the axial direction can be adopted, or the mode of compounding high-conductivity, high-permeability and wave-absorbing materials can be adopted.

The invention has the beneficial effects that: a high-speed bearing, a labyrinth ring and a conductive brush are arranged between each section of shaft sleeve and the rotating shaft, the high-speed bearing is arranged to enable the long shaft to reach the high rotating speed of 15000rpm, the conductive brush enables the shaft sleeve and the rotating shaft to be well electrically connected, an electric field can be well shielded, the labyrinth ring can form a longer effective waveguide in a shorter axial distance, the design length of the long shaft can be effectively shortened, and a magnetic field is well attenuated, so that good electromagnetic shielding efficiency is kept under the condition of high rotating speed.

The shielding flange is installed at the wall penetrating position of the shaft sleeve and is electrically connected with the shaft sleeve, the shielding disc is installed at the wall penetrating position of the metal shielding wall body and is also electrically connected with the shielding flange, the shielding flange and the shielding disc are connected through a high-number and high-conductivity conductive net, good electric connection between the shielding flange and the shielding disc is guaranteed, a waveguide labyrinth structure is designed between the shielding flange and the shielding disc, and soft wave-absorbing cotton is filled in the shielding flange and the shielding disc, so that good electromagnetic shielding efficiency is achieved, meanwhile, soft connection is kept between the shielding flange and the shielding disc, resonance of the long shaft and the metal shielding wall body during high-speed and high-torque operation is.

Long axis end supporting seat and intermediate strut install on single base and two bases, all install insulating shock attenuation bottom plate, insulating shock attenuation gasket and metal gasket on the position of the external part of connection of single base and two bases, pass the screw connection external part that the cover has the high frequency insulating tube again, can effectively completely cut off the influence of external electromagnetic field to long axis shielding performance, can attenuate the vibration of long axis simultaneously, improve the performance of long axis.

The end part of the rotating shaft is provided with the insulating coupler, so that the influence of an external electromagnetic field on the shielding performance of the long shaft can be effectively isolated.

According to different use environments and requirements, the mode of vertically installing a shielding flange, a shielding disc, wave-absorbing cotton and a conductive net along the radial direction between the shaft sleeve and the metal shielding wall body can be adopted, the mode of horizontally installing along the axial direction can be adopted, or the mode of installing high-conductivity, high-permeability and wave-absorbing materials to achieve the required shielding efficiency, the scheme can realize that the long shaft keeps good shielding efficiency under the working conditions of 15000rpm and 1000Nm, the vibration of the long shaft and the metal shielding wall body is reduced, and the service performance of the long shaft is improved.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

FIG. 1 is an isometric view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a top view of the present invention;

FIG. 4 is a right side view of the present invention;

FIG. 5 is a schematic view of the waveguide labyrinth structure of the region I in FIG. 2 according to the present invention;

FIG. 6 is a schematic view of the invention in an axial installation in the area I of FIG. 2;

FIG. 7 is a schematic view of the invention in the area I of FIG. 2;

FIG. 8 is a schematic view of the I I area labyrinth ring and conductive brush of FIG. 2 in accordance with the present invention;

FIG. 9 is a schematic view of the end support base of the II region of FIG. 2 connected to an external component according to the present invention;

in the figure: 1. an insulating damping bottom plate; 2. a high-frequency insulating tube; 3. an insulating shock-absorbing spacer; 4. a metal gasket; 5. a screw; 6. a single base; 7. an end support seat; 8. an insulating coupling; 9. an end cap; 10. a shaft sleeve; 11. a rotating shaft; 12. a shielding plate; 13. wave-absorbing cotton; 14. a metal shielding wall; 15. a conductive mesh; 16. a shielding flange; 17. a high speed bearing; 18. a labyrinth ring; 19. a conductive brush; 20. a middle supporting seat; 21. a double-seat base; 22. an inner shielding pressure plate; 23. a magnetic conductive mesh; 24. and an outer shielding pressure plate.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood 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.

Referring to fig. 1-9, an electromagnetic shielding high-speed long shaft includes a long shaft housing composed of two-section shaft sleeve 10, one end of the shaft sleeve 10 is supported by an end support 7, the other end of the shaft sleeve 10 is supported by a middle support 20 and the end support 7, three supports are used to improve the rigidity of the long shaft housing, a rotating shaft 11 and a high-speed bearing 17 supporting the rotating shaft 11 are installed inside the two-section shaft sleeve 10, an end cover 9 is installed at the end of the shaft sleeve 10 to improve the sealing performance of the long shaft, the shaft sleeve 10 passes through a metal shielding wall 14 of a darkroom, one end support 7 is installed on a single-seat base 6 and located outside the darkroom, the other end support 7 and the middle support 20 are installed on a double-seat base 21 and located inside the darkroom, a labyrinth 18 and a conductive brush 19 are installed between the shaft sleeve 10 and the rotating, a shielding flange 16 is arranged at the wall penetrating position of the shaft sleeve 10, a shielding disc 12 is arranged at the wall penetrating position of the metal shielding wall 14, wave-absorbing cotton 13 and a conductive net 15 are arranged between the shielding flange 16 and the shielding disc 12, an insulating damping bottom plate 1, an insulating damping gasket 3 and a metal gasket 4 are arranged at the positions of the single-seat base 6 and the double-seat base 21 which are connected with external parts, the insulating damping bottom plate 1 is arranged between the single-seat base 6 and the external parts to isolate external electromagnetic interference, the insulating damping gasket 3 is arranged between the single-seat base 6 and the metal gasket 4, a screw 5 penetrates through the metal gasket 4, the insulating damping gasket 3, the single-seat base 6 and the insulating damping bottom plate 1 to screw the external parts, thereby fixed single seat base 6, metal gasket 4 can prevent that 5 direct contacts of screw from twisting bad insulating damping gasket 3, and the cover has high frequency insulating tube 2 on the screw 5, and is isolated with screw 5 and single seat base 6.

A high-speed bearing 17, a labyrinth ring 18 and a conductive brush 19 are arranged between each section of shaft sleeve 10 and the rotating shaft 11, the high-speed bearing 17 is arranged to enable the rotating shaft 11 to reach the high rotating speed of 15000rpm, the conductive brush 17 enables the shaft sleeve 10 and the rotating shaft 11 to be well electrically connected and can well shield an electric field, the labyrinth ring 18 can form a longer effective waveguide in a shorter axial distance, the design length of a long shaft can be effectively shortened, and the magnetic field is well attenuated, so that the good electromagnetic shielding efficiency is kept under the condition of high rotating speed.

The shielding flange 16 is arranged at the wall penetrating position of the shaft sleeve 10 and is electrically connected with the shaft sleeve 10, the shielding disc 12 is arranged at the wall penetrating position of the metal shielding wall 14 and is also electrically connected with the shielding flange 16, the shielding flange 16 and the shielding disc 12 are connected through the high-number and high-conductivity conductive net 15, good electrical connection between the shielding flange 16 and the shielding disc 12 is guaranteed, a waveguide labyrinth structure is designed between the shielding flange 16 and the shielding disc 12, and soft wave-absorbing cotton 13 is filled in the shielding flange and the shielding disc 12, so that good electromagnetic shielding efficiency is achieved, meanwhile, soft connection is kept between the shielding flange 16 and the shielding disc 12, resonance of a long shaft and the metal shielding wall 14 during high-speed and high-torque operation.

Long axis end supporting seat 7 and intermediate support 20 are installed on single base 6 and double-seat base 21, insulating damping bottom plate 1 made by insulating damping material is all installed between single base 6 and double-seat base 21 and the external part, isolated external electromagnetic interference, insulating damping gasket 3 is installed between single base 6 and metal gasket 4, screw 5 passes metal gasket 4, insulating damping gasket 3, single base 6 and insulating damping bottom plate 1 twist to the external part, thereby fixed single base 6, metal gasket 4 can prevent screw 5 direct contact and twist up insulating damping gasket 3, the cover has high frequency insulating tube 2 on screw 5, with screw 5 and single base 6 isolated, thereby can effectively isolate the influence of external electromagnetic field to long axis shielding performance, can attenuate the vibration of long axis simultaneously, improve the performance of long axis.

The end part of the rotating shaft 11 is provided with an insulating coupler 8, so that the influence of an external electromagnetic field on the shielding performance of the long shaft can be effectively isolated.

According to the scheme, the shaft sleeve 10 of the through-wall long shaft, the rotating shaft 11 and the metal shielding wall 14 are regarded as an integrated electromagnetic shielding component, and the through-wall long shaft is kept electromagnetically isolated from the outside through the insulating structure formed by the insulating coupling 8 at the end part of the rotating shaft 11, the insulating damping bottom plate 1 of the long shaft base and the like, so that the long shaft is kept with good shielding efficiency under the working conditions of 15000rpm and 1000Nm, the vibration of the long shaft and the metal shielding wall is reduced, and the service performance of the long shaft is improved. According to different use environments and requirements, the mode of vertically installing the shielding flange 16, the shielding disc 12, the wave-absorbing cotton 13 and the conductive net 15 along the radial direction between the shaft sleeve 10 and the metal shielding wall 14 can also adopt the mode of horizontally installing along the axial direction (figure 6), or can adopt the mode of installing high-conductivity, high-permeability and wave-absorbing materials to be compounded (figure 7) so as to achieve the required shielding effectiveness, when the mode shown in figure 7 is adopted, the inner shielding pressing plate 22 is arranged at the bottom of the metal shielding wall 14, the magnetic conductive net 23 is arranged at one side of the metal shielding wall 14, and the outer shielding pressing plate 24 is arranged at one side of the magnetic conductive net 23.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.