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Seal device

A sealing device and sealing lip technology, which is applied in the direction of engine sealing, bearing components, engine components, etc., can solve the problems of weakening sealing effect, easy intrusion, and sealing lip wear

Inactive Publication Date: 2019-09-20
SCHAEFFLER TECH AG & CO KG
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Problems solved by technology

[0006] In the above-mentioned prior art, although the vents or protrusions in the form of holes or grooves can balance the pressure difference between the inner and outer sides and reduce the wear caused by the pressure difference, the existence of the vents or protrusions also makes it easy for pollutants to invade The sealing lip weakens the sealing effect; in addition, the intrusion of pollutants will also accelerate the wear of the sealing lip, further increasing the risk of failure

Method used

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Embodiment Construction

[0019] The specific implementation of the sealing device according to the present invention will be described below with reference to the accompanying drawings. The following detailed description and drawings are used to illustrate the principles of the present invention. The present invention is not limited to the described preferred embodiments, and the protection scope of the present invention is defined by the claims.

[0020] figure 1 A partial cross-sectional view of a sealing device according to an embodiment of the invention is shown. As shown in the figure, the sealing device is installed between two relatively rotatable workpieces—a first workpiece 8 and a second workpiece 9 , so as to perform dynamic sealing on them. Wherein, the second workpiece 9 is generally a shaft installed in the circular hole of the first workpiece 8, for example, the first workpiece 8 is the outer ring of the bearing, and the second workpiece 9 is the inner ring of the bearing. The sealing...

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Abstract

The invention relates to a seal device used for dynamic seal. The seal device comprises an annular elastic seal body, the elastic seal body extends from the circumferential side to form a first lip and a second lip, an annular middle cavity is formed between axial directions of the first lip and the second lip, a ventilation opening for communicating the middle cavity with the other axial side of the second lip is formed in the second lip, and the ventilation opening is filled with ventilation waterproof filling materials. The seal device can improve the seal effect, and meanwhile, the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of sealing. In particular, the invention relates to a breathable and dirt-resistant seal. Background technique [0002] As a dynamically supported part, bearings usually contain grease for lubrication. In order to prevent the grease in the bearing from leaking into other parts, it is usually necessary to install a sealing device at the end of the bearing for dynamic sealing. The existing bearing sealing device usually has a sealing lip and a dust-proof lip arranged at intervals along the axial direction, and both of them contact the sealed element at the same time. The dust-proof lip can effectively prevent pollutants from invading the space between the dust-proof lip and the sealing lip, so it has a better sealing effect. However, due to the relative rotation between the sealing device and the sealed part and the temperature change, a vacuum may be generated in the closed space between the dust lip and t...

Claims

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Application Information

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IPC IPC(8): F16J15/3232F16J15/3284F16J15/20F16C33/78
CPCF16C33/7823F16J15/20F16J15/3232F16J15/3284
Inventor 张岳林刘鑫
Owner SCHAEFFLER TECH AG & CO KG
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