Rear retainer ring of wagon rolling bearing

Abstract

The invention belongs to the technical field of bearing manufacturing, and provides a rear retainer ring of a wagon rolling bearing. The rear retainer ring (1) is provided with a rear retainer body (1-1). The inner surface of the rear retainer body (1-1) is an arc surface matched with the outer wall surface of a shaft shoulder. One side end face of the rear retainer body (1-1) is provided with an annular notch. One end of a sealing ring (1-2) is located in the annular notch in the rear retainer body (1-1), and the other end of the sealing ring (1-2) is arranged on a dust guard seat (4) in a sleeving mode. The inner diameter surface I (12) of the sealing ring is in interference fit with the outer diameter surface (14) of the dust guard seat. The inner diameter surface I (12) of the sealing ring is provided with a conical surface, and the conical surface is of a structure gradually drawing down inwards from the end, away from the rear retainer body, of the sealing ring. According to the rear retainer ring, axial movement, caused by deflection of a main shaft and a shaft neck, of the rear retainer ring is reduced, reutilization of the rear retainer ring is achieved, and the overhaul cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of bearing manufacture, and mainly relates to a back retaining ring of rolling bearings for railway wagons. Background technique [0002] The existing railway freight car bearings in my country are all maintenance-free sealed double-row tapered roller bearings. In addition to bearing downward pressure during operation, the bearings also need to support part of the comprehensive moment of the axle due to bending deformation and vehicle turning. The back ring or the journal portion close to the back ring is subject to higher stresses due to operating loads. [0003] figure 1 , figure 2 , image 3 A schematic diagram of the bearing assembly using the traditional railway bearing back ring is given. The bearing 6 is installed on the two free ends of the axle 10 to form an interference fit with the journal 5; the dust plate seat 4 is located on the axial inner side of the journal 5. Its diameter is greater tha...

AI Technical Summary

Problems solved by technology

The weight of the railway vehicle is transferred to the axle 10 through the bearing 6, and is transmitted to the ground through the wheel located in the axial inner side of the dust plate seat 4; the rear retaining ring 1 is a single component in the bearing assembly, and after the rear retaining ring is installed on the axle, The shaft journal 5 is connected through the dustproof plate seat 4. During the operation of the vehicle, due to the deviation of the main shaft, the rear retaining ring 1 will move relative to the journal 5, resulting in a gap between the rear retaining ring 1 and the dustproof plate seat 4. Fretting wear; fretting wear will loosen the back retaining ring 1 and increase the axial clearance of the bearing on the journal 5; the loose back retaining ring on the bearing assembly and the journal will accelerate wear and reduce the sealing effect of the back retaining ring; When water seeps into the gap between the back retaining ring and the journal fillet, the corrosion will aggravate the wear rate, destroy the axial positioning of the bearing, and cause the main shaft or bearing to fail, bringing great safety hazards to the train operation

[0004] Since the bearing is a high-value component, the bearing assembly of the railway freight car must be repaired and reused after a certain number of years or mileage of operation; when repairing the bearing assembly, since the back retaining ring is a single component, after disassembly, due The surface matched with the dust plate seat has been worn out and cannot be reused; a new back retaining ring needs to be replaced, which increases the cost to a certain extent

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