PL186536B1 - Measuring stand for making measurements of gate valve actuator torques - Google Patents

Abstract

Station for measuring drive moments electric gate valve in which tested the drive is connected via a clutch with a brake disc, characterized by that the disc brake (3) is in place to the body of the station, controlled is a coupled linear actuator (8) with a hydraulic pump (7) and connected via lever system (6) with sensor force measurement (4) connected through an amplifier (9) and A / D converter (10) with the computer (11).

Description

The subject of the invention is a stand for measuring the moments of electric drives of valves.

There is a known station for measuring the moments of electric drives of valves, in which the tested drive is coupled in one axis with the friction shoe brake through a measuring sensor in the form of a thin-walled torsion tube. The torque value is determined on the basis of a linear relationship between the value of the twist angle of the sensor and the torque causing the twist. It is also known a stand in which the tested drive is coupled directly to a multi-piston hydraulic pump. A throttle valve built into the hydraulic system enables the regulation of the braking torque generated by the pump. The value of the torque transmitted by the drive is determined by measuring the pressure generated by the hydraulic pump, which pressure is proportional to the magnitude of the torque.

The station for measuring the moments of electric drives of the valves according to the invention is characterized by the fact that it includes a disk braking unit attached to the body of the station, which is controlled by a linear actuator coupled with a hydraulic pump and connected via a lever system with a force measuring sensor connected through an amplifier and A / C converter with computer.

The solution according to the invention is characterized by the direct measurement of the braking torque caused by the friction force by measuring this force transferred by means of a simple lever system to the force sensor. This solution ensures high measurement accuracy as well as the ease of calibrating the measuring system, which is limited only to checking the force sensor. At the same time, the image of the temporal course of the torque allows both to determine the moment at any time and to verify the correctness of the entire measurement process based on the shape of the waveform.

The invention is illustrated by an exemplary embodiment in which Fig. 1 shows the stand layout in a schematic view, Fig. 2 shows a block diagram of an electric measuring line, and Fig. 3 shows an exemplary torque waveform.

The tested drive 1 is connected via the clutch 2 with the disc braking unit 3. The pressure of the blocks against the brake disc 5, controlled by a linear actuator 8 coupled with the hydraulic pump 7, causes the friction force, and the moment of this force loads the tested drive. The friction force is transmitted through the lever system 6 to the force measurement sensor 4. The force sensor 4 is the source of the measurement signal, which signal amplified in the amplifier 9 and converted into a digital form by the A / C converter 1θ is registered in an IBM PC H. the torque waveform 12 is the basis for evaluating the torque value at any point in the drive test process, for example the maximum value 13.

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fig. 2

Fig. 3

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Fig. 1

Publishing Department of the UP RP. Circulation of 50 copies. Price PLN 2.00.

Claims (1)

Patent claim The stand for measuring the moments of electric drives of the valves, in which the tested drive is connected via a clutch to the brake disc, characterized in that the disc braking unit (3) attached to the body of the stand is controlled by a linear actuator (8) coupled with a hydraulic pump. (7) and connected via a lever system (6) to a force measurement sensor (4) connected via an amplifier (9) and A / C converter (1θ) to the computer (11).