阅读说明：本技术 一种带法兰结构的激光陀螺磁场屏蔽装置及其安装方法 (Laser gyroscope magnetic field shielding device with flange structure and installation method thereof ) 是由 饶谷音 黄云 黄宗升 许光明 孙志刚 于 2019-09-03 设计创作，主要内容包括：本发明公开了一种带法兰结构的激光陀螺磁场屏蔽装置及其安装方法,属于屏蔽设备领域,包括基座,基座的中部设置有定位柱；用于放置激光陀螺的下屏蔽罩,下屏蔽罩中部开设的装配孔与定位柱配合,以使下屏蔽罩卡接在基座中,下屏蔽罩,下屏蔽罩的上部部分伸出基座,且伸出部分沿远离下屏蔽罩方向延伸,以使一体成型形成法兰件；盖板,盖板与基座之间设置有上屏蔽罩,上屏蔽罩与下屏蔽罩上的法兰件贴合；盖板的下部四周边沿设置有封边,封边为软磁材质,封边的内侧壁与上屏蔽罩、法兰件的侧壁接触,且下部与基座接触。解决了由于采用螺钉固定使材料形变等因素,磁屏蔽罩重叠部分的贴合紧密程度无法保证,易存在贴合间隙而影响磁场屏蔽效果的问题。(The invention discloses a laser gyroscope magnetic field shielding device with a flange structure and an installation method thereof, belonging to the field of shielding equipment and comprising a base, wherein the middle part of the base is provided with a positioning column; the lower shielding cover is used for placing the laser gyro, an assembly hole formed in the middle of the lower shielding cover is matched with the positioning column, so that the lower shielding cover is clamped in the base, the upper part of the lower shielding cover extends out of the base, and the extending part extends in the direction far away from the lower shielding cover, so that a flange piece is formed in an integrated mode; an upper shielding cover is arranged between the cover plate and the base and is attached to a flange piece on the lower shielding cover; the border is provided with the banding around the lower part of apron, and the banding is soft magnetic material, and the inside wall of banding contacts with the lateral wall of last shield cover, flange spare, and the lower part contacts with the base. The problem of because adopt the screw fixation to make factors such as material deformation, the laminating inseparable degree of magnetic shield cover overlap portion can't be guaranteed, there is laminating clearance easily and influences magnetic field shielding effect is solved.)

1. The utility model provides a laser gyroscope magnetic field shield assembly of flanged structure which characterized in that: the device comprises a base, wherein a positioning column is arranged in the middle of the base;

the lower shielding cover is used for placing the laser gyroscope, an assembly hole formed in the middle of the lower shielding cover is matched with the positioning column, so that the lower shielding cover is clamped in the base, the upper part of the lower shielding cover extends out of the base, and the extending part extends in the direction far away from the lower shielding cover, so that a flange piece is formed in an integrated mode;

an upper shielding cover is arranged between the cover plate and the base and is attached to a flange part on the lower shielding cover so as to form a closed magnetic circuit outside the laser gyroscope;

the edge sealing is arranged at the peripheral edge of the lower part of the cover plate, the edge sealing is made of soft magnetic materials with high magnetic conductivity, the inner side wall of the edge sealing is in contact with the side walls of the upper shielding cover and the flange piece, and the lower part of the edge sealing is in contact with the base;

and the height of the seal edge is equal to the sum of the thicknesses of the flange piece and the upper shielding case.

2. The laser gyro magnetic field shielding device with the flange structure as claimed in claim 1, wherein: the upper portion of base is provided with heavy platform, it is provided with the packing ring to sink the bench, the packing ring cover is established under on the shield cover, and upper portion and flange spare contact.

3. The laser gyro magnetic field shielding device with the flange structure as claimed in claim 2, wherein: the gasket is made of rubber.

4. The laser gyro magnetic field shielding device with the flange structure as claimed in claim 1, wherein: the height of the lower shielding cover is equal to that of the laser gyro, so that the upper end face of the lower shielding cover is flush with the upper end face of the laser gyro.

5. The method for installing the laser gyro magnetic field shielding device with the flange structure according to claim 1, wherein the method comprises the following steps: the mounting steps of the method are as follows,

s1, uniformly smearing adhesive on the outer side wall of the lower shielding cover, placing the lower shielding cover in the base, enabling the positioning column to penetrate through the assembling hole, and enabling the lower shielding cover to be bonded with the inner wall of the base through the adhesive;

s2, penetrating the bottom of the base and the bottom of the lower shielding cover through screws so as to fix the lower shielding cover in the base;

s3, uniformly coating an adhesive on the upper end face of the upper shielding case, and bonding the upper end face of the upper shielding case with the lower end face of the cover plate through the adhesive;

s4, the upper shielding cover and the cover plate are arranged in a penetrating mode through screws, so that the upper shielding cover is fixed on the cover plate;

s5, screws are arranged on the edge of the cover plate, the screws penetrate through the sealing edge and are connected with the base, the cover plate is fixedly connected with the base, and the laser gyro magnetic field shielding device is installed.

6. The method for installing the laser gyro magnetic field shielding device with the flange structure according to claim 5, wherein the method comprises the following steps: the adhesive is a silica gel adhesive.

Technical Field

The invention relates to the technical field of shielding equipment, in particular to a laser gyroscope magnetic field shielding device with a flange structure and an installation method thereof.

Background

The zero-bias stability of the laser gyro is a main index for evaluating the performance of the laser gyro and is also a key factor influencing the performance of an inertial navigation system, a positioning and orientation system and other application systems applying the laser gyro. The influence of the environmental magnetic field on the zero bias of the laser gyro is prominent. In order to eliminate the influence of the environmental magnetic field on the zero offset of the laser gyro, the laser gyro magnetic field shielding device is produced.

The existing laser gyro magnetic field shielding device generally adopts a cover type structure, and a magnetic shielding cover is divided into an upper part and a lower part. The overlapped parts of the side walls of the upper magnetic shield and the lower magnetic shield are fixed through screws, and due to the adoption of factors such as material deformation in the screw fixing process, the close degree of the laminating of the overlapped parts of the magnetic shields cannot be ensured, and the laminating gap is easy to exist so as to influence the shielding effect of the whole magnetic field.

Therefore, the laser gyro magnetic field shielding device with the flange structure and the installation method thereof are provided.

Disclosure of Invention

The invention mainly aims to provide a laser gyroscope magnetic field shielding device with a flange structure and an installation method thereof, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides a laser gyroscope magnetic field shielding device with a flange structure, which comprises a base, wherein the middle part of the base is provided with a positioning column; the lower shielding cover is used for placing the laser gyroscope, an assembly hole formed in the middle of the lower shielding cover is matched with the positioning column, so that the lower shielding cover is clamped in the base, and the extending part of the lower shielding cover extends in the direction far away from the lower shielding cover, so that a flange piece is formed by integral molding; an upper shielding cover is arranged between the cover plate and the base and is attached to a flange part on the lower shielding cover so as to form a closed magnetic circuit outside the laser gyroscope; the edge sealing is arranged at the peripheral edge of the lower part of the cover plate, the edge sealing is made of soft magnetic materials with high magnetic conductivity, the inner side wall of the edge sealing is in contact with the side walls of the upper shielding cover and the flange piece, and the lower part of the edge sealing is in contact with the base; and the height of the seal edge is equal to the sum of the thicknesses of the flange piece and the upper shielding case.

Further, the upper portion of base is provided with heavy platform, it is provided with the packing ring on the platform to sink, the packing ring cover is established on shield cover down, and upper portion and flange spare contact.

Further, the gasket is made of rubber.

Further, the height of the lower shielding cover is equal to the height of the laser gyro, so that the upper end face of the lower shielding cover is flush with the upper end face of the laser gyro.

Further, the mounting step is that,

s1, uniformly smearing adhesive on the outer side wall of the lower shielding cover, placing the lower shielding cover in the base, enabling the positioning column to penetrate through the assembling hole, and enabling the lower shielding cover to be bonded with the inner wall of the base through the adhesive;

s2, penetrating the bottom of the base and the bottom of the lower shielding cover through screws so as to fix the lower shielding cover in the base;

s3, uniformly coating an adhesive on the upper end face of the upper shielding case, and bonding the upper end face of the upper shielding case with the lower end face of the cover plate through the adhesive;

s4, the upper shielding cover and the cover plate are arranged in a penetrating mode through screws, so that the upper shielding cover is fixed on the cover plate;

s5, screws are arranged on the edge of the cover plate, the screws penetrate through the sealing edge and are connected with the base, the cover plate is fixedly connected with the base, and the laser gyro magnetic field shielding device is installed.

Further, the adhesive is a silica gel adhesive.

By applying the technical scheme of the invention, the beneficial effects are as follows: this laser gyroscope magnetic field shield assembly of flanged structure, shield cover joint is in the base down, it sets up under between shield cover and the apron to go up the shield cover, when banding on the apron contacts with the base, go up the flange spare laminating on shield cover and lower shield cover upper portion, through apron and base fixed connection, make and go up the shield cover and laminate with lower shield cover is stable, thereby realize closed magnetic circuit, it passes through the fix with screw to have solved upper and lower two parts shield cover lateral wall overlap portion, owing to adopt the fix with screw to make factors such as material deformation, the inseparable degree of laminating of shield cover overlap portion can't be guaranteed, the problem that influences whole magnetic field shielding effect easily exists the laminating clearance.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a general structural diagram of the laser gyro magnetic field shielding device with a flange structure;

FIG. 2 is a structural diagram of a lower shield cover of the laser gyro magnetic field shielding device with a flange structure;

FIG. 3 is a diagram showing a structure of a base of the laser gyro magnetic field shielding device with a flange structure;

fig. 4 shows a structure diagram of an upper shield cover of the laser gyro magnetic field shielding device with the flange structure.

Wherein the figures include the following reference numerals:

10. a base; 11. a gasket; 12. sinking a platform; 13. a positioning column; 20. a lower shield case; 21. a flange member; 22. an assembly hole; 30. a cover plate; 31. an upper shield case; 32. sealing edges; 40. a laser gyro.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 to 4, the invention provides a magnetic field shielding device for a laser gyroscope with a flange structure, which includes a base 10, wherein a positioning column 13 is arranged in the middle of the base 10; the lower shielding cover 20 is used for placing the laser gyro 40, a mounting hole 22 formed in the middle of the lower shielding cover 20 is matched with the positioning column 13, so that the lower shielding cover 20 is clamped in the base 10, the upper part of the lower shielding cover 20 extends out of the base 10, and the extending part extends along the direction far away from the lower shielding cover 20, so that a flange part 21 is formed by integral molding; a cover plate 30, wherein an upper shielding case 31 is arranged between the cover plate 30 and the base 10, and the upper shielding case 31 is attached to the flange part 21 on the lower shielding case 20 so as to form a closed magnetic circuit outside the laser gyro 40; the edge sealing 32 is arranged at the peripheral edge of the lower part of the cover plate 30, the edge sealing 32 is made of a soft magnetic material with high magnetic conductivity, the inner side wall of the edge sealing 32 is in contact with the upper shielding case 31 and the side wall of the flange part 21, and the lower part of the edge sealing is in contact with the base 10; wherein, the height of the sealing edge 32 is equal to the sum of the thicknesses of the flange member 21 and the upper shielding case 31.

By applying the technical scheme of the embodiment, the lower shielding case 20 is placed in the base 10 by being bonded by adhesive, the positioning column 13 penetrates through the assembling hole 22 on the lower shielding case 20 to be in contact with the laser gyroscope 40 in the lower shielding case 20, so that the placing stability of the laser gyroscope 40 can be improved, the lower shielding case 20 is clamped in the base 10, the upper shielding case 31 is arranged between the lower shielding case 20 and the cover plate 30, when the sealing edge 32 on the cover plate 30 is in contact with the base 10, the upper shielding case 31 is attached to the flange part 21 integrally formed on the upper part of the lower shielding case 20, the flange part 21 is in contact with the upper shielding case 31, so that the attaching surface can be increased, the sealing performance of the closed magnetic circuit formed by the upper shielding case 31 and the lower shielding case 20 is improved, the upper shielding case 31 is fixedly connected with the base 10 by the cover plate 30, so that the upper shielding case 31 is stably attached to the lower shielding case 20, thereby realizing the closed magnetic circuit, and solving, due to the factors of material deformation and the like caused by screw fixation, the close fit degree of the overlapped part of the magnetic shield cannot be ensured, and the problem that the whole magnetic field shielding effect is influenced by the fit clearance is easy to exist;

wherein, the banding 32 of the soft magnetic material through border setting high magnetic conductivity all around the lower part at apron 30, can shelter from the department of contact of last shield can 31 and lower shield can 20, when avoiding having the laminating clearance, influence whole magnetic field shielding effect, moreover, banding 32 highly equals flange spare 21 and the sum of last shield can 31 thickness, make when banding 32 lower part and lower shield can 20 contact, the clearance between apron 30 and lower shield can 20 is flange spare 21 and the sum of last shield can 31 thickness, thereby shield can 20 and the compactness of last shield can 31 laminating down have been improved.

In another embodiment, when the height of the lower shielding case 20 is smaller than the depth of the base 10, the lower portion of the flange 21 abuts against the upper portion of the base 10, so that the flange 21 is easily worn, the upper portion of the base 10 is provided with the sinking platform 12, the sinking platform 12 is provided with the gasket 11, the gasket 11 is sleeved on the lower shielding case 20, the upper portion of the lower shielding case contacts with the flange 21, and by arranging the gasket 11, the flange 21 can be prevented from directly contacting with the base 10, so that the problem of the shielding effect reduction caused by the wear of the flange 21 is solved.

Optionally, the gasket 11 is made of rubber.

As shown in fig. 1, the height of the lower shield 20 is equal to the height of the laser gyro 40 so that the upper end surface of the lower shield 20 is flush with the upper end surface of the laser gyro 40.

With such a structure, when the upper shield case 31 and the lower shield case 20 are closed, the displacement of the laser gyro 40 in the vertical direction can be limited, and the stability of placing the laser gyro 40 is improved.

A method for installing a magnetic field shielding device of a laser gyroscope with a flange structure comprises the following steps,

s1, uniformly coating an adhesive on the outer side wall of the lower shielding case 20, placing the lower shielding case 20 in the base 10, enabling the positioning column 13 to penetrate through the assembling hole 22, and enabling the lower shielding case 20 to be bonded with the inner wall of the base 10 through the adhesive;

s2, penetrating the bottom of the base 10 and the bottom of the lower shielding case 20 through screws so as to fix the lower shielding case 20 in the base 10;

s3, uniformly coating an adhesive on the upper end face of the upper shielding case 31, and bonding the upper end face with the lower end face of the cover plate 30 through the adhesive;

s4, the upper shielding cover 31 and the cover plate 30 are arranged through screws so that the upper shielding cover 31 is fixed on the cover plate 30;

and S5, arranging screws on the edge of the cover plate 30, enabling the screws to penetrate through the sealing edge 32 to be connected with the base 10, and enabling the cover plate 30 to be fixedly connected with the base 10, thereby completing the installation of the laser gyro magnetic field shielding device.

Optionally, the binder is a silicone adhesive.

According to the mounting method, the lower shielding cover 20 and the base 10 and the upper shielding cover 31 and the cover plate 30 are fixed respectively by the adhesive, and the cover plate 30 and the base 10 are assembled and fixed by the screws.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.