Sealing assembly for universal joint for crossed shaft type universal shaft coupler

Abstract

The invention discloses a sealing assembly for a universal joint for a crossed shaft type universal shaft coupler. The sealing assembly comprises a sealing element and a sealing seat, wherein the outer side of the sealing element is provided with a main sealing lip and a sub sealing lip which are inclined relative to the sealing element, the two sealing lips are respectively inclined in a direction towards the end part of the opening end of a bearing sleeve, the main sealing lip forms an angle being 40 degrees to 50 degrees with the axial direction of the sealing element, the sub sealing lip forms an angle being 25 degrees to 30 degrees with the axial direction of the sealing element, a U-shaped cavity is formed between the main sealing lip and the sub sealing lip, the thickness of the main sealing lip is 0.8 to 1.5mm, the thickness of the sub sealing lip is 80 percent of the thickness of the main sealing lip, the outer side of the sealing seat is provided with an annular groove, the depth of the annular groove is 4 to 4.5mm, the pre-tightening quantity being 0.1 to 0.2mm is realized between the width of the annular groove and the width of the sealing element, and the sealing element is arranged on the sealing seat through the annular groove formed in the sealing seat. The sealing assembly has the advantages that the sufficient lubrication of a sealing lip part can be realized, the abrasion can be reduced, and the in-site construction condition of the universal joint can be met.

Description

technical field [0001] The invention belongs to the technical field of shaft couplings, in particular to a sealing assembly for a universal joint of a cross-shaft universal coupling. Background technique [0002] The cross-shaft universal coupling is the most commonly used coupling. Using its structural characteristics, it can make two shafts that are not on the same axis or have a large bending angle or a large axial movement continue to rotate at the same angular speed, and it is reliable. transmit torque and motion. At present, it has been widely used in metallurgy, lifting, engineering transportation, mining, petroleum, shipbuilding, coal, rubber, papermaking machinery and other heavy machinery industries to transmit torque in mechanical shafting. [0003] In the traditional cross-shaft universal joint, the universal joint includes a cross shaft, and a needle bearing is installed on the journal of the cross shaft. The needle bearing includes a bearing sleeve and a needl...

AI Technical Summary

Problems solved by technology

Since the lip on the above-mentioned sealing body faces the inner ring of the needle bearing, the grease is thrown towards the bearing sleeve under the action of centrifugal force during the working process, and the lip of the inner ring lacks lubrication, and the friction force increases. Due to the friction, the sealing temperature rises , the lip part of the inner ring shrinks when heated, and the friction force is greater, resulting in a vicious cycle of the lip part

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