RU2538840C1 - Railway car bogie slipper - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: splitter comprises base (6) with cylindrical guide (7) arranged thereat for cylindrical barrel (1) to slide therein, flexible element (12) being arranged there between. Recesses (2, 8) filled with grease are made on contact surfaces of said barrel and guide. Barrel recesses are located at its bottom part while guide recesses are made at their top section. Distance from guide recess bottom point to barrel recess top point equals the slipper stroke (h).

EFFECT: longer life.

5 cl, 9 dwg

Description

The invention relates to increasing the resource of the railway carriage by improving the lubrication system and can be used in mechanical engineering in friction units operating in conditions of limited lubrication.

A slider of a railway carriage trolley is known, comprising a base on which a cylindrical guide is made, into which a cylindrical element having the shape of a cup, between which at least one elastic element is located, is telescopic. To reduce the coefficient of friction and increase the resource, by reducing the intensity of wear, a one-time lubrication or non-metallic coating is applied to the contacting surfaces of the cup and the guide (Support slide of a railway carriage trolley. Patent RU No. 2370388 C2 of 07.19.2007).

A disadvantage of the known design is that the lubricant applied to the contacting surfaces is squeezed out in the process of reciprocating movement of the side bearing from the friction zone. In addition, since the assembly is open, a sufficiently large number of abrasive particles that the wagon lifts from the railway track during movement will fall into it. These particles will be fixed in the lubricating layer or “soft” non-metallic coating, enhancing the effect of abrasive wear.

In addition, the glass-guide system operates in the reciprocating motion mode under the conditions of distortions of its elements and, therefore, is characterized by an abrupt increase in contact pressures. This causes the extrusion of the lubricant from the friction zone and the destruction of the “soft” non-metallic coatings.

These reasons lead to the fact that most of the time between maintenance cycles, these elements work in conditions of dry friction or lack of lubricant, as well as increased abrasive wear. Such processes are accompanied by fluctuations in the coefficient of friction in a wide range with a shift to high values. All this worsens the operation of the unit and reduces the resource due to the high intensity of wear, and at extreme values of the coefficient of friction it can lead to complete destruction (separation and breakage) of the side.

A slider of a railway carriage trolley is known, comprising a base on which a cylindrical guide is made, into which a cylindrical element in the form of a cup is telescopically inserted, between which at least one elastic element is located. The cup-guide system works either under conditions of dry friction, or to reduce the coefficient of friction and increase the resource by reducing the wear rate, apply a single lubricant to the contacting surfaces of the cup and the guide (Design and calculation of cars: Textbook for high schools of railway transport. / V.V. Lukin, L.A. Shadur, and others M.MMC MPS of Russia. 2000. S. 326-328).

A disadvantage of the known design is that the lubricant applied to the contacting surfaces is squeezed out in the process of reciprocating movement of the side bearing from the friction zone. In addition, since the unit is open, a sufficiently large number of abrasive particles will fall into it, which the car will lift from the railway track during movement. These particles will be fixed in the lubricating layer, enhancing the effect of abrasive wear.

With dry friction, the effect of abrasive particles is somewhat less, because they are not fixed in the friction zone, but the influence of other types of wear associated with the absence of a lubricant will significantly increase.

These reasons lead to the fact that all the time or most of the time between maintenance cycles, these elements work in conditions of dry friction or lack of lubricant and are subjected to a more or less abrasive wear. Such processes are characterized by fluctuations of the friction coefficient in a wide range with a shift to high values. All this worsens the operation of the unit due to the high intensity of wear and reduces the resource, and at extreme values of the coefficient of friction it can lead to complete destruction (separation and breakage) of the side member.

The invention solves the problem of stabilizing the friction coefficient in the region of minimum values and increasing the resource by reducing the wear rate by improving the lubricant supply system to the friction zone.

To this end, the slider of a railway carriage trolley containing a base having a cylindrical guide into which a cylindrical cup-shaped element telescopically enters, between which at least one elastic element is located, in accordance with the invention, recesses are made on the contacting surfaces of the glass and the guide lubricant. Moreover, they are located in the lower part of the glass, and in the upper part of the guide, while the distance from the lower point of the grooves of the guide to the upper point of the grooves of the glass is equal to the working stroke.

These recesses are made in the form of annular grooves.

The indicated recesses in the form of a circle are located around the perimeter, and the trajectories described by their extreme points are not superimposed during the movement.

These recesses have the shape of a rhombus, one of the diagonals of which coincides with the generatrix.

These recesses have the shape of a quadrangular rectangle, one of the sides of which coincides with the generatrix.

The invention is illustrated graphically in figure 1 ... 9.

Figure 1 shows an example of the execution of the glass 1 with a recess having the shape of an annular groove 2.

Figure 2 shows an example of the execution of the glass 1 with recesses having the shape of a circle 2, the extreme points of which a and b describe the paths 3 and 4.

Figure 3 shows an example of the execution of the glass 1 with recesses having the shape of a rhombus 2, the extreme points of which a and b describe the paths 3 and 4, and the diagonal cd coincides with the generatrix 5 of the cylindrical part of the glass.

Figure 4 shows an example of the execution of the glass 1 with recesses having the shape of a rectangular quadrangle 2, the extreme points of which a and b describe the paths 3 and 4, and the sides al and bm coincide with the generatrix 5 of the cylindrical part of the glass.

Figure 5 shows an example of the implementation of the base with a recess having the shape of an annular groove, consisting of a base 6, a cylindrical guide 7 and an annular groove 8.

Figure 6 shows an example of the implementation of the base with recesses in the form of a circle, consisting of a base 6, a cylindrical guide 7 and recesses 8, the extreme points of which m and n describe the paths 9 and 10.

Figure 7 shows an example of a base with recesses in the form of a rhombus consisting of a base 6, a cylindrical guide 7 and recesses 8, the extreme points of which m and n describe the paths 9 and 10, and the diagonal rf coincides with the generatrix 11 of the cylindrical guide 7.

On Fig shows an example of the implementation of the base with recesses in the form of a rectangular quadrangle, consisting of a base 6 and recesses 8, the extreme points of which m and n describe the paths 9 and 10, and the sides mz and nb coincide with the generatrix 11 of the cylindrical guide 7.

Figure 9 shows a slider containing a cup 1 telescopically mounted in a cylindrical guide 7 connected to the base 6, between which at least one elastic element 12 is installed. Moreover, there are recesses 2 and 8 on the cup 1 and the guide 7, and the distance between the lower point u of the recess 8 and the upper point q of the recess 2 is equal to the working stroke h sideways.

When the cylindrical part of the cup slides relative to the cylindrical guide as the contact surfaces wear out, a solid lubricant will get into the friction zone along with the wear products, which will be distributed along the surface (pressing into microroughnesses), forming a lubricating layer, thus reducing the friction coefficient and wear rate to a certain level. Since the lubricant layer will be restored as it breaks down, these parameters will be maintained at a certain constant level. Since the lubricating layer will be “dry”, the abrasive particles that have fallen into the friction zone will be ejected together with wear products and lubricant particles, not being fixed on the contact surfaces.

Claims (5)

1. A slider of a railway carriage trolley containing a base on which a cylindrical guide is made, into which a cylindrical cup-shaped element is telescopically inserted, between which at least one elastic element is located, characterized in that recesses are made on the contacting surfaces of the glass and the guide, filled with solid lubricant, moreover, at the glass they are located in the lower part, and at the guide - at the top, while the distance from the lower point of the grooves of the guide to The top point of the recesses of the glass is equal to the stroke. 2. The slider of the railway carriage according to claim 1, characterized in that the recesses are made in the form of annular grooves. 3. The slider of the railway carriage according to claim 1, characterized in that the notches having a circle shape are located around the perimeter, and the trajectories described by their extreme points are not superimposed during the movement. 4. The slider of the railway carriage according to claim 1, characterized in that the recesses are in the form of a rhombus, one of the diagonals of which coincides with the generatrix. 5. The slider of the railway carriage according to claim 1, characterized in that the recesses are in the form of a quadrangular rectangle, one of the diagonals of which coincides with the generatrix.

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