SU1486786A1 - Hydraulic transmission for measuring movements - Google Patents

Description

The invention relates to measuring equipment and can be used when measuring displacements. The purpose of the invention is to increase the dynamic accuracy and reliability by converting movement into force and vice versa. Measuring tip 3 under the action of the controlled product 14 compresses the spring 4, which causes the displacement of the block of membranes 6 due to the difference of their effective areas proportional to the forces of the springs 4 and 8 in the direction of the neutral position of the block of membranes 6.

But the indicator 13 fixes the position of the hard center 7, which is determined by the position of the measuring tip 3. Since the volume of the cavities 11 and 12 practically does not change with changes in the spring forces and the fluid does not actually move, and the transmission has little inertia, the elastic connection of the measuring tip with the piston eliminates shock effects and thereby increasing the reliability of the transfer of movements. 1 il.

1486786 A1

.1486786

The invention relates to measurement technology and can be used when measuring displacements, for example, associated with deformation.

The purpose of the invention is to increase the dynamic accuracy and reliability.

The drawing shows the transmission section.

Hydraulic transmission for measuring the displacement contains a hydraulic cylinder 1 with a piston 2, a measuring tip 3, a spring 4 installed between the measuring tip 3 and ⁴ piston 2, a hydromechanical converter 5 in the form of a block of two identical membranes 6 with a hard center 7, a spring 8 stretching, fastened with a rigid center 7 and an 'adjusting screw 9, a fluid-filled flexible conduit 10, which communicates the cavity 11 of the hydraulic cylinder with the intermembrane cavity 12. The rigid center 7 interacts with the displacement indicator 13, and measure ny 3-25 tip controlled product 14. The probe 3 is mounted on the hydraulic cylinder 1 so that the spring 4 is pressed against the piston. The screw 9 is installed in a position in which the hard center 7 is loaded with a spring 8 and is displaced along the axis of the hard center 7. The force of pressing the spring 4 to the piston 2 is selected so that the fluid in the cavities 11 and 12 and in the pipe 10 is under constant pressure , ensuring its continuity in any direction of movement of the measuring tip 3. The preliminary displacement by the spring 8 of the rigid center 7 is selected depending on the characteristics of the used membranes and the required transmission resolution. "

Hydraulic transmission works as follows.

When moving the controlled article 14 to the piston 2, the spring 4 is additionally compressed, and the fluid transfers the increased pressure to the intermembrane-rigid center of the block.

Compiled by V.Gordeev

Editor Shrybchenko Tehred M. Khodanych Proofreader L. Pilipenko

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12, due to which the block of membranes 6 moves towards the neutral position due to the difference in effective areas.

Since the volume of cavity 12 practically does not change with changing position of the hard center 7, for substantial movement of the hard center and the indicator rod 13 connected with it, it is practically not necessary to move the fluid from cavity 11 into cavity 12, therefore, the movement of the measuring tip 3 to movement of the indicator arrow 13 occurs with high dynamic accuracy.

In addition, the elastic connection of the measuring tip with the piston eliminates shock loads on the hydraulic transmission and movement indicator, which increases its reliability.

Thus, the implementation of the elastic connection of the two springs that interact through a fluid enclosed in a cavity of almost constant volume, allows you to increase the dynamic accuracy and reliability of the measurement.

Claims (1)

Claim Hydraulic transmission for measuring displacement, containing a hydraulic cylinder, a fluid-filled pipeline with a hydromechanical transducer, and an elastic connection of the piston of the hydraulic cylinder with a hydromechanical transducer, which is in terms of. With increased dynamic accuracy and reliability, the hydromechanical transducer is made as a block of two identical membranes with a coaxially displaced rigid center, the intermembrane cavity of which is connected to the pipeline, and the elastic connection is made in the form of two springs, one of which is preloaded to the piston, and the other spring loaded