RU215035U1 - FREIGHT CAR TROLLEY BEARING GASKET - Google Patents

Abstract

The utility model relates to railway rolling stock, in particular, to the design of a joint between a freight car frame and a bogie. Freight car bogie thrust pad is made in the form of a steel disk having a central through hole and recesses on the upper and lower surfaces for filling with lubricant. The recesses are made in the form of concentric rings of width B, located at a distance T from each other. The step of the recesses on the upper surface relative to the recesses on the lower surface is T/2. The wear of the contacting surfaces of the car center plate assembly in operation is reduced and the reliability of its operation is increased by reducing the friction coefficient. 1 z.p. f-ly, 4 ill.

Description

The utility model relates to railway rolling stock, in particular, to the design of a joint between a freight car frame and a bogie.

From the prior art, the bearing surface of the center plate of a freight car is known in the form of a disk having a central through hole, on which recesses filled with lubricant are located in the radial direction (RU 208359, publ. 12/15/2021).

Known gasket for the thrust bearing of a freight car bogie, which is a steel disk having a central through hole and through holes located at different distances from the center of the disk and filled with lubricant, taken as the closest analogue (RU 165310, publ. 10.10.2016).

The disadvantage of the above technical solution is the insufficient durability of the thrust bearing gasket due to the fact that the holes for retaining the lubricant are made through. This leads to the fact that during the operation of the truck, the lubricant is shifted from the upper surface of the gasket in contact with the thrust bearing to the lower surface of the gasket in contact with the thrust bearing. Thus, in the area of contact between the gasket and the center plate, there is a risk of dry metal-to-metal friction, which can lead to deformation of the parts.

The technical result of the claimed utility model is to reduce the wear of the contact surfaces of the center plate assembly of the car in operation by reducing the coefficient of friction, by the constant presence of antifriction material and its uniform distribution between the contact surfaces of the center plate assembly of the car, which ultimately leads to an increase in the service life of the car center point assembly .

The technical result is achieved by the fact that it is proposed to lay the thrust bearing of a freight car bogie in the form of a steel disk having a central through hole and recesses on the upper and lower surfaces for filling with lubricant, while the recesses are made in the form of concentric rings of width B, located at a distance from each other T.

In this case, the pitch of the recesses on the upper surface relative to the recesses on the lower surface may be T/2.

The utility model is illustrated by drawings, which show:

Figure 1 - gasket thrust bearing section;

Figure 2 - view A in figure 1

Figure 3 - view B in figure 1

Figure 4 - remote element In figure 1

The bearing pad of a freight car is a steel disk 1, in the center of which a central through hole 2 is made to accommodate a king pin (not shown). On both sides of the disk 1 on surfaces 3 and 4 there are recesses in the form of concentric rings 5. In this case, surface 3 (lower) is intended for contact with the thrust bearing (not shown), and surface 4 (upper) for contact with the thrust bearing (not shown) .

The material of the gasket steel can be varied: from simple carbon steel to high-alloy steel, depending on the requirements for the pivot assembly in operation in the car. In this regard, the possible properties of the material (such as hardness or yield strength) are very diverse. So, for example, the hardness of the gasket can be from 90 to 420 HB.

In the working position, the gasket is installed between the thrust bearing on the bolster and the thrust bearing fixed on the body of the freight car.

The concentric rings 5 are filled with a lubricant, which can be a solid (for example, iron-graphite, fluoroplast, bronze or babbitt) or a plastic anti-friction material (for example, CIATIM 221 made on the basis of silicone oil; CIATIM-201, made on the basis of refined petroleum oil; L3-TsNII, made on the basis of low-viscosity mineral oil; VNIINP-207, made on the basis of organosilicon liquid and synthetic hydrocarbon oil).

On the lower surface 3 along the outer edge, a chamfer 6 is made (figure 3), to prevent biting of the gasket on the thrust bearing during operation and to prevent damage to the thrust bearing by the sharp edge of the gasket.

Concentric rings 5, due to the lack of through communication between surfaces 3 and 4, keep the anti-friction material on the surface of the thrust bearing gasket and thereby create its sufficient supply for the entire period of operation, and the number of concentric rings 5 is selected depending on the hardness of the anti-friction material used.

The number of concentric rings 5 on surfaces 3 and 4 can vary from 2 to 10 (figures 2 and 3 show four and three recesses, respectively).

When the number of concentric rings is less than 2, the claimed technical effect is not achieved, because in this case, the amount of antifriction material will not exceed the amount in the closest analogue, and its distribution over the entire surface of the gasket will be uneven.

When the number of concentric rings 5 is more than 10, the technical effect is not achieved due to the fact that a larger number of concentric rings 5 will reduce the strength of the gasket, which can lead to its fracture.

Width "B" (Fig.4) concentric rings 5 on surfaces 3 and 4 can vary from 1 to 20 mm, and can be either the same for all or variable.

The width "B" also depends on the number of concentric rings 5 on the surfaces of the gasket. So, to ensure the claimed technical effect, it is necessary to strike a balance between the amount of anti-friction material and the fragility of the gasket. For example, if you make two concentric rings 5, then it is most reasonable to make the value "B" equal to 20 mm, and if the number of concentric rings 5 is equal to ten, it is most reasonable to make the value "B" equal to 1 mm. It may also depend on the diameter of the gasket itself, i.e. for larger pads, the gasket diameter will also be correspondingly larger, and ten rings will require a width “B” not 1 mm, but, for example, 2 mm or more.

Depending on the number of concentric rings 5 and their width "B", the step "T" between two rings 5 can vary from 20 to 40 mm.

The step "T", as well as the width "B" varies to provide the claimed technical effect, i.e. it is necessary to strike a balance between the amount of anti-friction material and the fragility of the gasket. Thus, for example, if there is a "B" equal to 20 mm, and the number of concentric rings is equal to 2, it is most reasonable to make the value of "T" equal to 40 mm.

When this concentric rings 5 are located relative to each other in such a way that their step on the surface 3 relative to the concentric rings 5 on the surface 4 is T/2 (figure 3).

The above ratio must be maintained in order not to reduce the strength of the gasket, because. if the concentric rings 5 are opposite each other, then the wall between the recesses will be very thin and easily fractured.

Thus, the values of "B" and "T" are selected depending on the number of concentric rings 5, which, in turn, depends on the selected anti-friction material.

For example, when using TsIATIM-201 lubricant as an antifriction material, it is most reasonable to make the number of concentric rings 5 equal to six, the width "B" of the concentric rings 5 equal to 5 ± 1 mm, and the pitch "T" equal to 25 ± 5 mm.

During the operation of the car, the center plate and the center plate rotate relative to each other on the pivot within the limits of the car bogie turn in curved sections of the track. Due to the large loads of the bearing surface of the center plate, a large friction force arises between them and, as a result, a large wear of both surfaces. To avoid this, between the center plate and the center plate of the freight car there is a center plate gasket, on the surfaces 3 and 4 of which there are recesses in the form of concentric rings 5 filled with lubricant. As the rotation progresses, the lubricant is delivered to the contact between the corresponding gasket surface and the center plate or center plate and helps to reduce abrasion of the freight car bogie parts.

The inventive design of the bearing pad of the freight car bogie allows you to keep the lubricant in the center plate assembly, as well as to provide a gradual dosed supply of lubricant over the entire rubbing surface of the wagon bogie gasket, thereby eliminating the possibility of dry friction for a long time and contributing to an increase in the wear resistance of the part, which in as a result, it allows to increase the reliability of the gasket in operation.

Claims (2)

1. The bearing pad of a freight car bogie made in the form of a steel disk having a central through hole and recesses on the upper and lower surfaces for filling with lubricant, characterized in that the recesses are made in the form of concentric rings of width B, located at a distance T from each other. 2. The thrust bearing pad according to claim 1, characterized in that the pitch of the recesses on the upper surface relative to the recesses on the lower surface is T/2.

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