RU196818U1 - RAILWAY CAR Trolley - Google Patents

Abstract

The inventive utility model relates to railway transport and relates to the design of a molded nadressorno beam of the truck of a railway freight wagon containing the upper belt (1), lower belt (2) with inner longitudinal ribs (3) of height N and vertical side walls (4). The technical result of the claimed utility model, which consists in increasing the bearing capacity of the sprung beam while maintaining its mass, is ensured by the fact that the internal longitudinal ribs (3) in the central horizontal part (2.1) of the lower belt (2) are made with increasing height N in the direction of the vertical transverse axis nadressornogo beams to a height of N, while the ratio of the sum of the height N of the inner longitudinal ribs (3) and the thickness S of the lower belt (2) in its central horizontal part (2.1) to the height H of the central vertical cross the cross section of the pressure beam is from 0.15 to 0.3, and the vertical side walls (4) in the central vertical cross section of the pressure beam have holes (6) with a width B made in the range from 155 to 165 mm and a height C, made in the ratio: C = H- (K + L), where H is the height of the central vertical cross section of the nadresornoy beam, mm; K is the distance from the lower external contour of the lower belt of the central cross section of the nadresornoy beam to the lower contour of the hole of the vertical side walls in the zone central the vertical cross section of the nadressornoj beam, mm; L - the distance from the upper outer contour of the upper belt of the central vertical cross section of the nadressornoj beam to the upper contour of the hole of the vertical side walls in the area of the central vertical cross section of the nadressorno beam, mm; while K≥0.3 N and L≥0.2 N. 8 s.p. f-ly, 4 ill.

Description

The inventive utility model relates to railway transport and relates to the design of a molded nadressornoj beam trolley freight car.

The supercharger beam of a railroad freight car trolley is a part whose reliability determines the safety of railway rolling stock.

Known from the prior art is a nadressor rail of a railway trolley in the form of a box-shaped steel casting, consisting of an upper belt, including an annular plate of a thrust bearing with a shoulder and a system of longitudinal and transverse reinforcing ribs, side vertical walls with technological holes, as well as a lower belt with internal longitudinal ribs located symmetrically to the central longitudinal axis of the beam (RU 2565642, B61F 5/00, publ. 20.10.2015).

Known nadressornoj trolley railroad freight cars, including the upper belt, lower belt with inner longitudinal ribs, and vertical side walls (SU 1220990, B61F 5/52, publ. 30.03.1986). In this technical solution, in order to increase reliability by stabilizing the fatigue reserve and increasing durability, the longitudinal ribs of the lower belt are located in vertical planes, and the ratio of their heights to the nominal thickness of the lower belt is 1.3-1.4 (prototype).

A common technical problem of the above technical solutions is the low bearing capacity of the nadressorno beam due to the high bending stresses in it. The installation of additional reinforcing ribs will allow to increase the bearing capacity, however, we will lead to a significant increase in the mass of the nadressornoj beam.

The technical result of the claimed utility model is to increase the bearing capacity of the sprung beam of a railroad freight car trolley while maintaining its mass.

The specified technical result is achieved by the nadressornoj beam of a railway freight car truck containing an upper belt, a lower belt with internal longitudinal ribs of height N and vertical side walls, in which the internal longitudinal ribs in the central horizontal part of the lower belt are made with increasing height N in the direction of the vertical transverse axis the bolster to the height of N _max, wherein the ratio N _max height amounts of internal longitudinal ribs, and the thickness S of the lower belt in its central horizontal part to the height H of the central vertical cross-section of the nadressornoj beam is from 0.15 to 0.3, and the vertical side walls in the area of the central vertical cross-section of the nadresornoy beam have holes with a width of B, made in the range from 155 to 165 mm, and a height of C performed in the ratio:

C = H- (K + L),

where N is the height of the Central vertical cross section of the nadressorno beam, mm,

K is the distance from the lower external contour of the lower belt of the central cross-section of the nadressore beam to the lower contour of the hole of the vertical side walls in the zone of the central vertical cross section of the nadressorno beam, mm,

L is the distance from the upper outer contour of the upper belt of the central vertical cross section of the nadressorno beam to the upper contour of the hole of the vertical side walls in the zone of the central vertical cross section of the nadressorno beam, mm,

wherein K≥0.3 N and L≥0.2 N.

As a development of a utility model, the ratio of the values of the height N to the highest height N _max in the central part of the lower zone can be 0.5≤N / N _max <1; the height N _{max of the} longitudinal ribs in the Central horizontal part of the lower belt can be performed in the size range from 17.5 to 83 mm; the height N _{max of the} longitudinal ribs in the central horizontal portion of the lower chord may preferably be 60 mm; the thickness S of the lower zone in its central horizontal part can be made in the size range from 25 to 35 mm; the height H of the central vertical cross section of the nadressorno beam can be performed in the size range from 350 to 360 mm; the height H of the central vertical cross section of the nadressorno beam can preferably be 356 mm; the width B of the openings of the vertical side walls in the area of the central vertical cross-section of the sprung beam may preferably be 160 mm; the thickness T of the inner longitudinal ribs in the central horizontal part of the lower belt can be made in the size range from 20 to 30 mm

The inventive utility model differs from the prototype in that the inner longitudinal ribs in the central horizontal part of the lower belt are made with increasing height N in the direction to the vertical transverse axis of the spring beam to a height N _max , while the ratio of the sum of the height N _{max of the} internal longitudinal ribs and the thickness S of the lower the belt in its central horizontal part to the height H of the central vertical cross-section of the sprung beam is from 0.15 to 0.3, and the vertical side walls in the central vertical zone the th cross section of the nadressorno beam have holes with a width of B, made in the range from 155 to 165 mm, and a height of C, made in the ratio:

C = H- (K + L),

where H is the height of the Central vertical cross section of the nadressorno beam, mm;

K is the distance from the lower external contour of the lower belt of the central cross section of the nadressornoj beam to the lower contour of the hole of the vertical side walls in the zone of the central vertical cross section of the nadressornoj beam, mm;

L is the distance from the upper outer contour of the upper belt of the central vertical cross section of the nadressorno beam to the upper contour of the hole of the vertical side walls in the zone of the central vertical cross section of the nadressorno beam, mm,

wherein K≥0.3 N and L≥0.2 N;

the ratio of the values of the height N to the highest height N _max in the central part of the lower belt may be 0.5≤N / N _max <1; the height N _{max of the} longitudinal ribs in the Central horizontal part of the lower belt can be performed in the size range from 17.5 to 83 mm; the height N _{max of the} longitudinal ribs in the central horizontal portion of the lower chord may preferably be 60 mm; the thickness S of the lower zone in its central horizontal part can be made in the size range from 25 to 35 mm; the height H of the central vertical cross section of the nadressorno beam can be performed in the size range from 350 to 360 mm; the height H of the central vertical cross section of the nadressorno beam can preferably be 356 mm; the width B of the openings of the vertical side walls in the area of the central vertical cross-section of the sprung beam may preferably be 160 mm; the thickness T of the inner longitudinal ribs in the central horizontal part of the lower belt can be made in the size range from 20 to 30 mm This difference from the prototype gives reason to argue that the proposed technical solution meets the patentability criterion of a utility model - "novelty."

The claimed technical solution is illustrated by graphic images, where in FIG. 1 shows a nadressornoj beam of the truck of a railway freight car, the main view; in FIG. 2 - remote element A in FIG. 1; in FIG. 3 - nadressornoj beam, top view; in FIG. 4 - remote element B in FIG. 3.

The supercharger beam of the railway freight wagon truck is made in the form of a box-shaped steel casting and contains an upper belt 1, a lower belt 2 with two internal longitudinal ribs 3 of height N and vertical side walls 4. The nadresornaya beam is equipped with a removable thrust bearing 5.

The technical result of the claimed utility model, which consists in increasing the bearing capacity of the nadressornoj beams of the railroad freight wagon trolley while maintaining its mass, is provided as follows.

The inner longitudinal ribs 3 in the central horizontal part 2.1 of the lower girdle 2 are made with increasing height N in the direction of the vertical transverse axis of the sprung beam to a height N _max , the ratio of the sum of the height N _{max of the} inner longitudinal ribs 3 and the thickness S of the lower girdle 2 in its central horizontal part 2.1 to a height H of the central vertical cross-section of the nadresornoy beam is from 0.15 to 0.3, and the vertical side walls 4 in the area of the central vertical cross-section of the nadresorno beam tverstiya width B 6 formed in the range from 155 to 165 mm, and a height C, formed in a ratio of:

C = H- (K + L),

where N is the height of the Central vertical cross section of the nadressorno beam, mm,

K is the distance from the lower external contour of the lower belt of the central cross-section of the nadressore beam to the lower contour of the hole of the vertical side walls in the zone of the central vertical cross section of the nadressorno beam, mm,

L is the distance from the upper outer contour of the upper belt of the central vertical cross section of the nadressorno beam to the upper contour of the hole of the vertical side walls in the zone of the central vertical cross section of the nadressorno beam, mm,

at the same time, K≥0.3 N, L≥0.2 N.

This embodiment of the internal longitudinal ribs 3 provides the redistribution of metal in the most loaded part of the lower belt 2 of the nadressor beams - the central horizontal part 2.1, thereby reducing the bending stresses from the vertical load in this area, which allows to reduce the level of stress concentration and increase the fatigue reserve, contributes to the improvement strength and fatigue characteristics of the overpressor beam of a railway freight car truck as a whole without increasing its mass, increases the load-bearing the ability of the nadressornoj beam while maintaining its mass.

When the ratio of the sum of the height N _{max of the} inner longitudinal ribs 3 and the thickness S of the lower girdle 2 in its central horizontal part 2.1 to the height H of the central vertical cross section of the stress beam is less than 0.15, the internal longitudinal ribs 3 in the central horizontal part 2.1 of the lower girdle 2 do not leave zones of high tensile stresses and act as stress concentrators, which will quickly lead to the development of cracks in them. When the ratio of the sum of the height N _{max of the} inner longitudinal ribs 3 and the thickness S of the lower girdle 2 in its central horizontal part 2.1 to the height H of the central vertical cross section of the stress beam is more than 0.3, the internal longitudinal ribs 3 leave the high-voltage zone, but this will not lead to a greater increase in strength, but will lead to an unnecessary increase in the mass of the lower belt 2 of the nadresornoy beam.

The claimed range of widths in the holes 4 of the vertical side walls 3 in the zone of the central vertical cross section of the nadresnogo beam provides a decrease in the mass of the nadressornoj beam while ensuring sufficient bearing capacity, fatigue reserve of the vertical walls 4 to absorb the vertical load in the specified area and, accordingly, retains the bearing capacity nadressornoj trolleys railroad freight car in general. The implementation of a width of B more than 165 mm will reduce the mass of the nadressornoj beam, however, will reduce the bearing capacity, and the implementation of a width of B less than 155 mm will increase the load-bearing capacity and strength of the nadresornoj beam, however, slightly reduce the weight and, in addition, will not provide access for control during technical and operational inspection for casting defects and fatigue cracks. Preferably, a width B of 160 mm is provided.

The claimed height ratio C ensures the location of the holes 4 of the vertical side walls 3 in the zone of the central vertical cross section of the nadressor beam within the boundaries of the zone of the neutral line of the middle horizontal section of the nadressornoj beam - a line with close to zero stresses with a vertical load on the nadressorno beam, which reduces the mass of the nadressornoj beams with the maximum allowable load-bearing capacity of the nadressornoj of the cart of the railway freight car in operation. With K <0.3 N and with L <0.2 N, openings 4 will act as stress concentrators and will begin to reduce the strength and bearing capacity of the nadressornoj beam.

The ratio of the values of the height N to the highest height N _max in the central part 2.1 of the lower belt 2 is 0.5 N N / N _max <1. The thickness T of the inner longitudinal ribs 3 in the Central horizontal part 2.1 of the lower belt 2 can be performed in the range from 20 to 30 mm This allows you to provide load-bearing capacity while maintaining the mass of the sprung beam due to the geometry of the internal longitudinal ribs 3 in the Central horizontal part 2.1 of the lower belt 2, corresponding to the nature of the stresses when exposed to vertical loads, providing an increase in the moment of resistance in this section, which leads to a decrease in stresses from the vertical load.

The height N _{max of the} internal longitudinal ribs 3 in the Central horizontal part 2.1 of the lower belt 2 can be performed in the size range from 17.5 to 83 mm; preferably, the highest height N _max is 60 mm. When the value of the highest height N _max more than 83 mm will not happen a greater increase in the bearing capacity of the lower belt 2, however, will lead to an increase in mass. When the maximum height N _{max is} less than 17.5 mm, the internal longitudinal ribs 3 in the central horizontal part 2.1 of the lower belt 2, while maintaining the mass, will not provide sufficient and necessary strength for the transfer and distribution of loads to the lower belt 2 and will act as stress concentrators.

The thickness S of the lower belt 2 in its central horizontal part 2.1 is made in the range from 25 to 35 mm. The specified range is optimal for ensuring the local strength of the lower belt 2 in its central horizontal part 2.1 while maintaining the mass of the nadresornoy beam. Exceeding the lower boundary of the range will lead to a decrease in the bearing capacity of the lower belt 2 and the overpressure beam as a whole, and going beyond the upper boundary will not lead to a larger increase in the carrying capacity of the lower belt 2, but will lead to an increase in its mass.

The nadressorny beam is made with a height H of a central vertical cross section in the range from 350 to 360 mm; it is preferable to perform a height H of a central vertical cross section of a nadressornoj beam, which is 356 mm Exceeding the upper limit of the range will provide a greater increase in the bearing capacity and reliability of the inventive nadressornoj beam in operation, but will lead to an excessive increase in the mass of the nadresornoj beam. Going beyond the lower limit of the range will not provide sufficient strength and will lead to a decrease in the bearing capacity of the nadressornoj beam.

Claims (14)

1. The supercharger beam of a railroad freight car truck comprising an upper belt, a lower belt with inner longitudinal ribs of height N and vertical side walls, characterized in that the inner longitudinal ribs in the central horizontal part of the lower belt are made with increasing height N in the direction of the vertical transverse axis nadressornogo beams to a height of N _max , the ratio of the sum of the height N _{max of the} internal longitudinal ribs and the thickness S of the lower belt in its central horizontal part to the height H of the central the vertical cross section of the nadressornoj beam is from 0.15 to 0.3, and the vertical side walls in the area of the Central vertical cross section of the nadresornoj beam have holes with a width B made in the range from 155 to 165 mm, and a height C made in the ratio: C = H- (K + L), where N is the height of the Central vertical cross section of the nadressorno beam, mm, K is the distance from the lower external contour of the lower belt of the central cross-section of the nadressore beam to the lower contour of the hole of the vertical side walls in the zone of the central vertical cross section of the nadressorno beam, mm, L is the distance from the upper outer contour of the upper belt of the central vertical cross section of the nadressorno beam to the upper contour of the hole of the vertical side walls in the zone of the central vertical cross section of the nadressorno beam, mm, wherein K≥0.3 N and L≥0.2 N. 2. The nadressornoj beam according to claim 1, characterized in that the ratio of the values of the height N to the highest height N _max in the central part of the lower belt is 0.5 N N / N _max <1. 3. Nadressornoj beam according to claim 1, characterized in that the height N _{max of the} longitudinal ribs in the Central horizontal part of the lower belt is made in the size range from 17.5 to 83 mm 4. Nadressornoj beam according to claim 1, characterized in that the height N _{max of the} longitudinal ribs in the Central horizontal part of the lower belt is preferably 60 mm 5. The nadressornoj beam according to claim 1, characterized in that the thickness S of the lower zone in its central horizontal part is made in the size range from 25 to 35 mm. 6. The nadressorno beam according to claim 1, characterized in that the height H of the Central vertical cross section of the nadressorno beam is made in the size range from 350 to 360 mm 7. The nadressorno beam according to claim 1, characterized in that the height H of the Central vertical cross section of the nadresorno beam is preferably 356 mm 8. The nadressorno beam according to claim 1, characterized in that the width B of the holes of the vertical side walls in the area of the Central vertical cross section of the nadresorno beam is preferably 160 mm 9. The nadressornoj beam according to claim 1, characterized in that the thickness T of the inner longitudinal ribs in the central horizontal part of the lower belt is made in the size range from 20 to 30 mm.

Images