CN-117386814-B - Shafting sealing structure

Abstract

The invention discloses a shafting sealing structure, which belongs to the technical field of shafting dynamic sealing of airborne photoelectric equipment, and is provided with a sealing ring which is arranged on a shafting fixed assembly, a flexible sealing element which is arranged on a shafting rotating assembly, and a flexible brush which is arranged on the shafting rotating assembly and is used for supporting the flexible sealing element, wherein the sealing ring is arranged on the shafting rotating assembly side and is in abutting contact with the flexible sealing element in a lap joint mode so as to press the flexible sealing element and the flexible brush to generate elastic deformation to seal the shafting.

Inventors

• SHEN HONGHAI
• CHENG YANPING
• XU YONGSEN
• LI HAO
• MENG LINGTONG

Assignees

• 中国科学院长春光学精密机械与物理研究所

Dates

Publication Date

20260512

Application Date

20231103

Claims (9)

1. 1. A shafting sealing structure, characterized by comprising: a seal ring (5) mounted on the shafting fixing assembly (4); -a flexible seal (2) mounted on the shafting rotation assembly (3); a flexible brush (1) mounted on the shafting rotation assembly (3) for supporting the flexible seal (2); The sealing ring (5) is arranged on the side of the shafting rotating assembly (3) and is in abutting contact with the flexible sealing element (2) in a lap joint mode so as to press the flexible sealing element (2) and the flexible brush (1) to elastically deform to seal the shafting; The flexible brush (1) comprises a body part (11) with an annular structure and a thin annular part (12) formed outside the body part (11), wherein a flexible structure is circumferentially formed at the outer edge position of Bao Huanbu (12) and is used for releasing stress and flexibly deforming Bao Huanbu (12).
2. 2. A shafting sealing structure according to claim 1, wherein: The sealing body has a mating surface (53), and the mating surface (53) can intrude into the mounting surface of the flexible sealing member (2) to be in contact with the sealing surface (22).
3. 3. A shafting sealing structure according to claim 2, wherein: A boss (52) of an annular structure is formed on the surface of the inner ring side of the sealing ring (5), the boss (52) is provided with the matching surface (53) of a convex arc structure, and the boss (52) is the sealing body.
4. 4. A shafting sealing structure according to claim 1, wherein: a deformation area is formed at the edge position of the flexible brush (1) away from the sealing body side, so that the flexible sealing element (2) and the flexible brush (1) enter the deformation area when deformed.
5. 5. A shafting sealing structure according to claim 1, wherein: The flexible structure is a plurality of fine grooves (14), the fine grooves (14) are uniformly distributed along the circumferential direction Bao Huanbu (12), and the fine grooves (14) penetrate through the Bao Huanbu (12).
6. 6. The shafting sealing structure of claim 5, wherein: The sealing ring (5) is provided with a plurality of mounting holes, the flexible sealing piece (2) is provided with a plurality of mounting holes which are uniformly distributed in the circumferential direction, and the body part (11) of the flexible brush (1) is positioned at two adjacent slots (14) and is provided with the mounting holes in the middle.
7. 7. A shafting sealing structure according to claim 1 or 4, characterized in that: The thickness of Bao Huanbu (12) is smaller than the thickness of the body portion (11), and the upper surface of Bao Huanbu (12) is coplanar with the upper surface of the body portion (11) for supporting the flexible seal (2).
8. 8. A shafting sealing structure according to claim 1, wherein: the sealing ring (5) is a metal ring.
9. 9. A shafting sealing structure according to claim 1, wherein: the sealing ring (5), the flexible sealing piece (2) and the flexible brush (1) are all installed at the end part of the shafting.

Description

Shafting sealing structure Technical Field The invention relates to the technical field of shafting dynamic sealing of airborne photoelectric equipment, in particular to a shafting sealing structure. Background The on-board photoelectric equipment can realize detection, identification and tracking measurement of targets, is widely applied to sea-based and roadbed task systems, is internally provided with a plurality of effective loads, generally comprises an infrared camera, a multispectral camera, a visible light camera, a laser and other precise mechanical components, is sensitive to working environments, can seriously influence the transmission precision of a shafting and the imaging performance of the system if exposed to dust and salt fog environments, and can also cause equipment damage when serious, so that the equipment needs to be subjected to effective shafting dynamic seal design; At present, the shafting dynamic seal in the prior art is mainly a sealing structure in the form of a spring energy storage sealing ring, and is realized by arranging the sealing structure along the radial direction, wherein the spring energy storage sealing ring mainly consists of a sealing jacket and an internal metal energy storage spring, the sealing jacket is generally made of polytetrafluoroethylene or other high-function polymer materials, the energy storage sealing ring is arranged in a sealing groove, and the spring is pressed to generate elastic deformation force so as to promote the sealing jacket to cling to the sealing groove, thereby forming a seal; In order to ensure effective sealing, the energy storage sealing ring needs a certain pretightening force of the spring, which can cause larger additional friction moment on the shafting, especially obvious in low-temperature working condition and seriously affect the driving capability of the shafting, the magnitude of the additional moment mainly depends on the pretightening quantity of the spring and the roughness of the surfaces of two relative moving parts, in the actual assembling and adjusting process, although the pretightening quantity of the spring can be adjusted by trimming and adjusting the width of the sealing groove and the method for improving the surface roughness can reduce certain additional moment, the energy storage sealing structure is arranged in the shafting, the assembling and disassembling are inconvenient, and the requirement on the processing technology is higher, so the adjusting and controlling effect of the additional moment is limited, and the requirement on the clearance between the energy storage sealing structure and the shafting relative moving parts is higher, usually less than 0.1mm, when the equipment works in high-low temperature environment, the deformation quantity is caused by thermal expansion and cold contraction of the structural parts to exceed the clearance value, thus causing interference and poor temperature adaptability; Therefore, in view of the above problems, the present invention provides a shafting sealing structure with small structural size, small friction torque, convenient adjustment and higher temperature adaptability. Disclosure of Invention The invention aims to overcome the defects in the prior art and provide a shafting sealing structure. In order to achieve the above object, the present invention provides the following technical solutions: The invention discloses a shafting sealing structure, which comprises: a seal ring mounted on the shafting fixing assembly; A flexible seal mounted on the shafting rotation assembly; The flexible brush is arranged on the shafting rotating assembly and used for supporting the flexible sealing element, wherein the sealing ring is arranged on the shafting rotating assembly side and is provided with a sealing body, and the sealing body is in abutting contact with the flexible sealing element in an overlapping mode so as to press the flexible sealing element and the flexible brush to elastically deform to seal the shafting. Further, the seal body has a mating surface capable of penetrating into the mounting surface of the flexible seal member to contact the sealing surface. Further, a boss of an annular structure is formed on the surface of the inner ring side of the sealing ring, the boss is provided with the matching surface of a convex arc structure, and the boss is the sealing body. Further, a deformation region is formed at the edge of the flexible brush away from the seal body side so that the flexible seal and the flexible brush enter the deformation region when deformed. Further, the flexible brush comprises a body part with an annular structure and a thin ring part formed outside the body part, wherein the outer edge of the thin ring part is circumferentially provided with a flexible structure for releasing stress and flexibly deforming Bao Huanbu. Further, the flexible structure is a plurality of thin grooves, the thin grooves are uniformly distributed alo