CS239557B1 - Device for measuring torsional compliance of flexible couplings and shafts by means of a series resistor connection - Google Patents

Abstract

The purpose of the solution is to achieve greater sensitivity and accuracy in measuring small angles of rotation, flexible couplings and shafts. The stated purpose is achieved by the fact that a dielectric mounting disk is mounted on the periphery of the driving part of the clutch, along the periphery of which resistors equipped with conductors are mounted, the conductors being in contact with the resistance sensor on the flexible disk of the driving part of the clutch and the entire electrical circuit is powered by a ring located on the hub of the driving part of the clutch and led out by a collector ring on the hub of the driven part of the clutch, from where it is led to the measuring instrument. It is applicable in measuring and regulating the phase of working machines, especially metalworking machines, compressors, gasoline and diesel engines and other machines operating with variable tension.

Description

3 4 239357

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a device for measuring the flexible compliance of flexible couplings and shafts when retracted, using a series connection of electrical resistances disposed around the perimeter of the casting screen.

To measure torsional compliance and smoothing, a resistive sweep meter, measurement using an Amsler-dynamometer, stroboscopic measurements, inductive measurements as well as measurements using a torsional duct compliance and axial displacement ring are used. There are also known measurements of assisting phenomenon in steel, namely, mega-strike measurements, at. measuring the magnetic properties of the retracted steel, measuring it by the Wiedeman effect, where the strain on the coil surrounding the loaded shaft is generated, and the measurements are taken by the resistance strain gauges, where a change in active resistance is recorded when driving. These measurements are often complex and used. only in laboratory conditions. With simpler measurements, the carbon black achieves low sensitivity when measured.

The above mentioned drawbacks are eliminated by the device according to the invention, in which the sensitivity is measured in the measurement of the electrical resistance, where the loss of current is measured on the individual resistances inserted on the circumference of the setting disc on the drive part of the coupling or shaft. SUMMARY OF THE INVENTION A dielectric mounting disc is mounted on the periphery of the drive portion of the coupling, along which the conductors provided with the conductors are inserted and these are in the contact by a resistance sensor on a flexible disc clutch, wherein the entire electrical circuit it is fed by a ring on the coupling sleeve and led out by a collecting ring on the hub of the driven coupling part from where it is directed to the measuring device. By this engagement, the loss of current at each resistor is achieved when rotating, and the resulting current loss is the sum of the reduced currents at each resistor. The sensitivity of the apparatus will then depend on the diameter of the dielectric mounting disk, the compliance of the coupling, and the number of resistances mounted on the mounting disk. Then, with the sensitive ammeters, the measured value can be expressed by the circumferential units, the angle of rotation, the torque units and the known speed of the plates, or the machine's effective power or equipment can be measured using a multiplier. The measured value can also be used to control unidirectional revolutions. motor, by means of a servo-device for controlling the load of the working machine or engine.

Fig. 1 is an example of a measurement of clutch compliance and a schematic representation of the series engagement of the control resistances in measuring the length dimensions. Fig. 2 shows the measurement of torsional compliance of a child using an Amsler dynamometer. The flexible couplings with high torsional strength, in addition to the illustrated coupling, are the corresponding non-metallic spring couplings, such as PERIFLEX and GURI-FLEX couplings, which have a yield of 0.3-0.4 rows.

In connection with a flexible coupling with a spring spring after the circumference according to FIG. 1, the driving part 3 is inserted in the driven part 2 by the shaft 1 and is mounted in the turn. A dielectric deposition disc 4 is mounted on the clutch drive part 3, on the circumference of which the resistors 5 are inserted, which are fed from the ring 6 located on the drive part 3 of the clutch. On the driven part 2 of the clutch, the disc 7 is flexible, on the circumference of which the collectors 8 are installed, by which the current value changes at all resistors at the same time when the clutch is rotated and this is guided by the conductor 9 for further resistance. The outlet ring 10, which is located on the drive part 2 of the coupling, is a measured value of the current directed to the ammeter A, which is adapted to measure the angle of rotation, torque or circumferential force. Similarly, the loss of resistance to resistances can also be measured.

FIG. 2 shows a device of the Amsler dynamometer, wherein the shaft 11 is inserted in a pipe 12 on which a dielectric baffle 13 is located, on the circumference of which resistors 14 are inserted. When the shaft 11 is twisted when the machine is retracted, the disk 13 is rotated, collectors 16 are installed, and the readings from all resistors are routed to the measuring device 17. The shaft 11 is fixed to one side of the tube 12, on the other side by the roller bearing. them. The number of resistors 5 and 14 on the circumference of the electrical disk 4 depends on the compliance of the coupling and the shafts. It is desirable to use the device of the invention for a smaller angle of rotation as it assists in measuring sensitivity. It allows, on the basis of the measured values, to control the drive motor or the machine depending on its retraction.

The aforementioned measurement and control measures, for their simplicity, can be used to operate a machine or device, so it can be used to permanently measure the working machine load, even at a considerable distance from the machine. It is widely used in engineering laboratories for diagnostic tests, but especially for machines that operate with variable loads such as machine tools, compressors, gasoline and diesel engines, and other machinery.

Claims (1)

2 3 9 5 5 7 OBJECT The device for measuring the torsional compliance of flexible couplings and shafts in the series connection of resistors consisting of a flexible coupling, the driving shaft of which is mounted in the driven part, characterized in that at the periphery of the driving part (3) the coupling a dielectric mounting disk (4) is mounted, on the circumference of which the resistors (5J provided with conductors (9) are inserted), the conductors (9) are in contact with the resistance sensor (8) on the driving disk (7) [ 2] of the coupling, the entire electrical circuit being fed by a ring (6) located on the hub of the drive part (3) of the coupling and led out by the collecting ring (10) on the hub of the driven coupling part (2) from where it is directed to the measuring apparatus. výkresov f