RU1835063C - Arrangement for loading of samples by axial loadings - Google Patents

Abstract

Use: in a test technique to create stresses and strains in samples. Essence: a plate 2 is installed in the housing 1, in which columns 4 are mounted, fastened by a traverse 5. A working hydraulic cylinder is installed on the plate 7. The working medium is supplied through hollow rods 6 in the cavity of the columns 4. The columns are moved relative to the plate 2 and plungers 6. In this case, the working space is increasing. When draining, the traverse columns move in the opposite direction. 1 silt

Description

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The invention relates to a testing technique and is intended to create stresses and strains in a sample in order to determine the physicomechanical characteristics of the materials from which the samples are made. In this case, it is required to test samples of various lengths, which in turn leads to the need to create loading devices with a variable working space.

The aim of the invention is to provide a compact loading device of low metal consumption, with low expenditures of the working fluid, with a high speed of regulation of the working space, and high reliability of sealing devices by using hollow columns as lifting cylinders.

The invention is illustrated in the drawing.

The proposed loading device comprises a base 1, on which a plate 2 is mounted with clamping devices 3, which fix the hollow columns 4 relative to the plate 2. The hollow columns are fixedly attached to the beam 5. Inside the hollow columns A, hollow plungers are placed 6. A working plate is fixedly mounted on the plate 2 hydraulic cylinder 7. The hollow plungers b are fixedly fixed with their lower part to the base 1. The clamping devices 3 are rigidly fastened to the plate 2. The hollow columns 4 are located inside the clamping devices 3. When the working fluid is supplied to the working floor The clamping device spacers 3 last compress the hollow columns 4 on the outer surfaces and, due to friction forces, fix them relative to the plate2.

Changing the working space A in the loading device is as follows.

In the absence of fixation of the hollow columns 4 relative to the plate 2 by clamping devices 3, the working fluid is supplied through the hollow rods b in the cavity of the hollow columns 4. The latter are moved, leaning on the hollow rods 6, relative to the plate 2, frame 1 and hollow plungers b, together with the traverse 5 .With this, the working space A increases. When draining the working fluid from the cavity of the columns 4, the latter, together with the traverse 5, move in the opposite direction, the working space A decreases.

The use of hollow columns as lift cylinders instead of using them as plungers reduces the metal consumption and size of the loading device.

The absence on the damaged surfaces of the clamping devices of the outer surfaces of the columns of seals prevents the depressurization of the lift cylinders (hollow columns) and thus increases the reliability of the loading device.

The use of columns as hydraulic cylinders with small hollow plungers reduces the volume of internal cavities of hollow columns, which, in turn, reduces the need for working fluid, increases the rate of change of the working space, or, in other words, reduces the time of preparatory work and increases productivity

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Claims (1)

SUMMARY OF THE INVENTION A device for loading samples by axial loads, comprising: a housing; the slab placed therein, a lifting device in the form of columns mounted on the slab and a traverse rigidly mounted on them, a loading means and means for supplying a medium mounted on the slab, which are characterized in that, in order to increase reliability while increasing productivity, the columns are made hollow with hollow plungers installed in these cavities, one the ends of which are fixed to the base, and the cavities are in communication with the medium supply means.