RU2389627C2 - Pivot system of railway vehicle - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: invention relates to railway transport. Proposed system of railway vehicle coupling bogie with bearing frame comprises pivot and thrust bearing in contact along bearing and thrust surfaces and recesses filled with solid or cup grease. Recesses are arranged on bearing and thrust surfaces of the pivot and thrust bearing. Recess depth makes at least tolerable wear along normal, while angle formed by adjacent recesses edges in radial direction does not exceed bogie turn angle. Note here that ratio of bearing and thrust surfaces to appropriate total area of recesses located thereon satisfies the condition σ = F/A-A1 ≤ [σ], where σ, [σ] makes rated and tolerable strains, F is normal force; A, A₁ are surface are and total area of recesses thereon, respectively.

EFFECT: longer life, reduced wear of bearing and thrust surfaces.

3 cl, 4 dwg

Description

The invention relates to friction units operating in conditions of limited lubrication, and can be used in friction units of rolling stock in railway transport.

Known thrust bearings mounted on vertical shafts (see, for example, P.I. Orlov, "Fundamentals of Design: a Reference and Methodological Manual." In 2 books. Kn.2. - M .: Mechanical Engineering, 1988. P 381), consisting of a blind sleeve, which includes a pin on the end of the shaft (heel), which receives axial load. They try to use such bearings in liquid lubrication mode. However, if the heel is made flat, then the lubricant comes to the friction surfaces with difficulty, since there is no covering wedge layer of oil. In this case, semi-fluid friction occurs, leading to rapid wear of the support (see, for example, V. Dobrovolsky, Machine parts. - Kiev: State Publishing House of the Technical University of the Ukrainian SSR, 1954, p. 472).

The well-known pivot system of a railway carriage (see, for example, V.V. Lukin, L.A. Shadur and others. Design and calculation of cars: Textbook for universities railway transport. - M .: Publishing house of the UMK MPS of Russia , 2000, p.327), connecting the wagon with the body frame, which contains a Friday and a thrust contacting on the supporting and thrust surfaces located at an angle. In this case, the supporting surface provides frictional contact in the vertical direction, and the persistent provides frictional contact in the horizontal direction. The lubrication of these surfaces is provided by introducing a single grease during depot repair, during which the pivot assembly is disassembled.

A disadvantage of the known design of the pivot assembly is the low durability of the Friday and the thrust bearing, which is explained by extrusion of a single grease from the friction zone. As a result, most of the time between maintenance cycles, the frictional contact of the Friday and the thrust bearings is carried out in conditions of lack of lubricant or even in the absence of lubricant.

The invention solves the problem of increasing the durability of the pivot node by reducing the wear rate of the resistant and supporting surfaces of the heel and heel.

This is achieved by the fact that in the pivot system of the device moving on rails connecting the undercarriage with the supporting frame, comprising a Friday and a thrust contacting along the thrust and abutment surfaces, according to the invention, recesses filled with lubricant material with a depth not less than the normal allowable wear, while the angle formed by the edges of two adjacent recesses in the radial direction does not exceed the angle of rotation of the cart in curves chastkah path, and the area ratio of the supporting or abutment surfaces corresponding to the total area of the recesses located therein satisfies the following condition:

where σ, [σ] are respectively the nominal and permissible stresses,

F is the normal force

A, A ₁ - respectively, the surface area and the total area of the recesses on it.

These recesses are filled with solid lubricant.

These recesses are filled with grease.

The invention is illustrated figure 1-4.

Figure 1, 2 shows an example of the design of the thrust bearing, consisting of a hole 1 for the king pin, persistent 2 and supporting 3 surfaces, on which there are recesses 4 of an oval shape (figure 1) or in the form of grooves (figure 2), the angle α formed by the edges of two adjacent recesses in the radial direction does not exceed the angle β of rotation of the trolley in the curved sections of the path, i.e. α≤β.

Figure 3, 4 shows an example of the design of the Friday, consisting of a pin 5, persistent 2 and supporting 3 surfaces, on which there are recesses 4 of an oval shape (figure 3) or recesses in the form of grooves (figure 4), in which α formed by the edges of two adjacent recesses in the radial direction does not exceed the angle β of the bogie rotation in the curved sections of the track, i.e. α≤β.

When sliding the Friday relative to the thrust bearing as the supporting and thrust surfaces wear out, a lubricant enters the contact zone with the wear products, which covers the friction surfaces and reduces the wear rate of these elements.

Claims (3)

1. A pivot system of a device moving on rails and connecting a running trolley with a supporting frame, comprising a Friday and a thrust contacting on the supporting and thrust surfaces, characterized in that recesses are provided on the thrust and supporting surfaces of the Friday and thrust bearing, the depth is not less than the normal allowable wear, while the angle formed by the edges of two adjacent recesses in the radial direction does not exceed the angle of rotation of the cart in the curved sections of the path, and the ratio areas of the support or abutment surfaces corresponding to the total area of the recesses located therein satisfies

,
where σ, [σ] are the nominal and permissible stresses, respectively;
F is the normal force;
A, A ₁ - respectively, the surface area and the total area of the recesses on it. 2. The pivot system according to claim 1, characterized in that said recesses are filled with solid lubricant. 3. The pivot system according to claim 1 or 2, characterized in that said recesses are filled with grease.

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