Method for designing combined sealing device used in low speed and heavy load conditions of bearing

Abstract

The utility model relates to a method for designing a combined sealing device used in low speed and heavy load conditions of a bearing. The half section of a sealing ring (4) is shaped like a Chinese character 'jiu' with one stroke to the left, and composed of a horizontal support (5), an inclined vertical support (6) and a beveled lip (7) which are naturally connected through three semicircular arcs R1, R2 and R3, a locking spring (3) is assembled in a semicircular groove of the sealing ring, then the sealing ring is installed into a left bracket-shaped inner casing (2), the end of the semicircular arc R2 is outward, and finally, a right bracket-shaped outer casing (1) is buckled outside the inner casing (2) at the end of the semicircular arc R2, and sealed for preventing the inner casing (2) from falling out of the outer casing (1). The sealing ring is clamped in a door-shaped structure including the outer casing and the inner casing to form the combined sealing device, therefore, a favorable guarantee is provided for maintaining the stiffness of the skeleton of the sealing ring, and the inclined vertical support and the beveled lip are in contact with the shaft shoulder of the inner ring, therefore, the dustproof and antifouling effect is better, the frictional contact area is reduced, and abrasion is reduced.

Description

[0001] technical field [0002] The invention belongs to the technical field of sealing, and in particular relates to a design method of a combined sealing device used in low-speed and heavy-load working conditions of bearings. [0003] Background technique [0004] Cylindrical roller bearings or tapered roller bearings under low-speed heavy-load conditions or harsh environments may cause premature failure of the above-mentioned bearings due to contamination of lubricating oil or grease. [0005] Usually, the sealing is implemented at the bearing box where the above-mentioned bearing is installed, and the sealing effect is not ideal. [0006] With the development of bearings to be unitized, if seals are added to the structure of the bearing itself, the operating conditions of the above-mentioned bearings will be better improved, thereby increasing the service life of the bearings, reducing maintenance and reducing costs. [0007] figure 1 It is a seal used in the ou...

AI Technical Summary

Problems solved by technology

[0008] 1. If the contact surface of the seal is too long, the friction force generated is relatively large, which will easily cause the contact surface to wear prematurely and reduce the use effect of the seal;

[0009] 2. The skeleton rigidity of the seal is not enough, it is easy to cause the deformation of the seal during the installation process, so that the actual use effect of the actual seal is reduced

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