RU2283790C2 - Rail vehicle freight bogie - Google Patents

Abstract

FIELD: railway transport.

SUBSTANCE: invention relates to axle box stage of bogie spring suspension. Bogie center plates 6 with concave spherical surface are secured in upper part of axle box apertures of bogie side frames, and mating top pivot bearings 7 are found on housing of axle boxes. Centers of spherical surface of pivot bearings and center plates concide and are located lower than axle of wheelset. Antifriction member 9 is placed between pivot bearing and center plate of each axle box.

EFFECT: increased service life of axle box unit.

2 cl, 2 dwg

Description

The invention relates to freight carts of railway transport, in particular to their structural elements.

Known biaxial trolley model 18-100 for freight cars of the main railways [1], containing two wheelsets with axle boxes mounted on two longitudinal side frames, a sprung beam resting on a set of springs.

Serial production of trolleys began in 1956 and since then the trolley has been repeatedly modernized. Nevertheless, the model 18-100 trolley has several disadvantages: rigid axle suspension, a significant mass of unsprung parts, insufficient resistance to skewing of the trolley frame, etc. One of the main disadvantages is the wear of the contacting surfaces in axle box suspension. Depreciation is observed both on the axle box body and on the side frame. In this case, wear is several millimeters. During the movement of the trolley and the mutual movement of the axle box and frame body, wear prevents the axle suspension from moving and operating normally, which makes it difficult to fit the wheel pair into the track and leads to increased wear of the wheel flanges and rails in operation.

The proposal of the State Unitary Enterprise “Uralvagonzavod” to modernize the trolley [2] is known, namely that the area of the supporting surfaces is increased by 1.5 ... 1.7 times, and a wear-resistant strip is welded to the frame in the axle box opening. These measures extend the service life, but not by much.

The problem solved by the proposed device is to reduce the wear of the bearing surfaces at the junction of the axle box with the frame. This problem is solved by the fact that a thrust bearing with a concave spherical surface is fixed in the aforementioned cargo trolley in axle box openings of the side frames, and a counter spherical Friday is mounted on the body of each axle box in its upper part, the centers of the spherical surfaces of the Friday and the bearing coincide and are below the axis of the wheelset . In addition, an elastic anti-friction element can be installed between the firing plate and the thrust bearing.

Figure 1 shows the design of the trolley, and figure 2 - the design of the proposed device axle boxes.

The trolley consists of two longitudinal side frames 1, two wheelsets 2 with axle boxes 3, an adressor beam 4 supported by a set of springs 5. In axle box openings of the side frames of the side frames 1, thrust bearings 6 with a concave spherical surface are fixed, and the response Friday is fixed on the axle boxes 7 The centers of the spherical surfaces of the Friday and the thrust coincide and are located below the axis 8 of the wheel pair 2. In addition, between the Friday 7 and the thrust bearing 6 there is an elastic element 9.

The device operates as follows. The vertical load on the trolley, perceived by the nadressor beam 4, is transmitted through a set of springs 5 to the side frames 1, which are supported by the spherical thrust bearings 6 on the axleboxes on which the spherical fenders are fixed 7. The axlebox housings are located in the axlebox openings of the side frames 1. During the movement of the car fluctuations of the wheelsets 2 in axle openings. Unlike the prototype, the axle box body moves along the spherical surface of the thrust bearing 6 and Friday 7. The restoring moment is formed as a result of the eccentric application of the resultant forces due to the displacement of the axles of the axle of the wheel pair and the spherical surface of the Friday 7. In addition, a restoring guide is also introduced in the axle box openings moment.

The proposed design significantly increases the durability of the axle box, because dramatically reduces the wear of rubbing surfaces by reducing the specific pressures in the rubbing pairs. An elastic anti-friction element 9, installed between the Friday 7 and the thrust bearing 6, also helps to reduce wear. It also reduces the vibration transmitted to the car from the wheelset.

Literature

1. Heavy engineering, 2000, No. 10, p.41.

2. Ibid., P.31 (prototype).

Claims (2)

1. A freight trolley containing two longitudinal side frames, two wheelsets with axle boxes, a sprung beam resting on a set of springs, characterized in that thrust bearings with a concave spherical surface are fixed in the upper part of the axle openings of the side frames, and reciprocal Fridays on the axle boxes, moreover, the centers of the contacting spherical surfaces of the heels and thrusts coincide and are below the axis of the wheelset. 2. The freight trolley according to claim 1, characterized in that an elastic antifriction element is installed between the fifth and the thrust of each axle box.