SU1654673A1 - Device to measure pressure of train wheel on rails - Google Patents

Abstract

The invention relates to railway transport, in particular to the mixing of rolling stock. The purpose of the invention is to improve the measurement accuracy. The device contains two parallel insulated rail sections resting on rectangular rods on the faces of which resistors are fixed, and the rods are rigidly connected to the base and to the rail. 3 il.

Description

The invention relates to railway transport, in particular to the weighting of rolling stock.

The purpose of the invention is to improve accuracy.

Figure 1 shows the device, a general view; figure 2 - section aa in figure 1; on fig.Z - location of the strain gages on the rods x.

The device contains a rail: 1, each of which is fixed at the sole on the longitudinal beam 2, and between the latter and the base 3 there are mounted rectangular rods 4. The bases 3 are attached to the frame 5 together with the sleepers 6 of the adjacent rail sections 7, and to ensure the safety of movement counter supports 9 are installed on supports 8, while strain gages are mounted on rods x 4. The length of the rail 1 at the measuring site is 90-100% of the wheel diameter, which ensures the separate passage of the wheelsets through the device. The rods 4 are arranged in pairs symmetrically relative to the axis of the rail

along the edge of its sole. The pairs of rods are placed at regular intervals along the rail axis. Extreme pairs are located along the edges of the measuring segments. In order to avoid tensile forces in the rods, the four joints between the rails of the measuring section and the rails of the adjacent sections are made with a bevel in such a way that the non-measuring pieces partially hang over the rails of the 1 measuring section.

When the wheelset enters the rails 1 of the measuring section, the rails exert pressure on the rods 4, and they deform, and the strain gages experience compression and tension due to the influence of the vertical, longitudinal and transverse components of the load.

Using strain gauges, longitudinal strains, E $, are measured. where K 1 - 16 - the number of the rod within the measuring section; 1 1-4 is the number of the side face of the rod 4; j 1-2 is the level number according to the height of this face.

ABOUT

2

ON VI WITH

At each time point, the vertical RK, the lateral RK, and the longitudinal PЈ components of the load constitute

PЈ-- ЈEfi (i);

- &

h (1 + s # 1k) -132 (1 +) +

+ Y2 (1 + ak) -Y1 (1 + # 1K);

| pf E & i (1 4-oys) - Е & (1 + е & О 4 (1 + с & к) -Е & 1 (1 + оЈж),

Pb + E &

where H is the distance in height between the levels of measurement of axial deformation;

1x, 1y - moments of the cross section of the support rods;

hell | K, ffljK, Schn, are the coefficients reflecting the errors due to inaccuracies in the manufacture of structural elements and the sticking of strain gages;

0

five

0

F is the rod section area;

E is the elastic modulus of the rod.

The load created by each of the wheels is obtained by summing over the corresponding group of rods.

Claims (1)

Invention Formula A device for determining the pressure of rolling stock wheels on rails, comprising a base mounted under the rails on the measuring section and trans-oriented rectangular rods installed between the rails and the base, on one of the side faces of each of which are mounted resistors, characterized in that precision, rectangular rods are directly and rigidly connected to the rail and the base, and strain gauges are mounted on the other faces of each rod, and on each face Resistors are fastened under each other along the longitudinal vertical axis of the face. FIG. one FIG. 2 D З