RU2006009C1 - Torque meter - Google Patents

Abstract

FIELD: measurement technology. SUBSTANCE: device has two half-couplings connected through elastic members and mounted on drive and driven shafts aligned. The half-couplings are kinematically coupled with gearing one member of which is rigidly coupled with one half-coupling and the other is located on the axis of a rotary angle changer firmly secured to the end-face of the other half-coupling. The torque meter is made in the form of a second rotary angle changer. EFFECT: enhanced accuracy. 2 dwg

Description

 The invention relates to measuring equipment and can be used in various fields of national economy.

 A device for measuring torque, selected as a prototype, containing two half-couplings mounted coaxially on the driving and driven shafts connected by an elastic sensing element and a torque meter is known.

 The disadvantage of this device is its complexity and lack of measurement accuracy.

 The technical result aimed at simplifying the device and improving the accuracy is achieved due to the fact that gearing consisting of two gears is introduced in the moment meter containing a coupling, consisting of half-couplings located on the coaxially mounted driving and driven shafts of the coupling coupled by an elastic element, and a torque meter, elements, two electric machine angle and rolling bearings, while the coupling halves are kinematically connected by gearing, one element of which is rigidly mounted on one coupling half and the other olozhen to dynamoelectric angle transducer axis, is rigidly fixed to the end of the other coupling half, the ends of each coupling half are set to interact with the rolling bearing, and the torque meter is configured as a second inverter dynamoelectric angle.

 In FIG. 1 shows a general view of a momentometer; in FIG. 2 - torque meter, electrically connected with an electric machine angle converter 9.

 The torque gauge contains an elastic coupling, consisting of half-couplings 1 and 2, kinematically connected by elastic elements 3. In this case, tensile springs are used as elastic elements, although torsion springs are preferable, since they allow to increase the elastic deformation limits. The springs 3 are connected with adjustable 4 and non-adjustable 5 stops. Adjustable stops 4 allow you to change the tightening forces of the springs and fix the achieved value of the force with the lock nut 6. The coupling half 1 is rigidly mounted on the drive shaft 7, the coupling half 2 - on the driven shaft 8.

 At the end of the coupling half 1 there is an electric machine angle converter 9, on the axis of which the gear 10 is rigidly fixed, which engages with a gear ring made on the coupling half. The coupling halves are provided with cylindrical guides. When twisting the coupling halves relative to each other, the spring force of the springs will change, which will lead to a change in the friction forces on the supporting surfaces and a distortion of the linear dependence of the spring force on its deformation. And this will lead to an uneven calibration of the scale 11 of the torque meter 12. To avoid this, the coupling halves are equipped with rolling bearings 13.

An electric machine angle converter, which is a rotating transformer, is used as a torque meter, and depending on the design, it can be a rotating transformer, inductosin, reductosin and selsyn. Depending on this, the error of operation in the range of the angle of rotation of 360 ^about is from several minutes to several seconds.

 Electric machine angle converters work in pairs: one as a sensor, the other as a receiver. The receiver, on the axis of which an arrow is mounted, rigidly connected to the scale, can be an indicating device.

 Both transducers can be electrically connected by contact or non-contact. The calibration of the scale in units of torque will be linearly dependent on the angle of rotation of the coupling, and when calculating the error of readings, the gear ratio of the gearing should be taken into account. For calibration, it is enough to have a copper lever and a set of goods with the given masses.

 Momentomer works as follows.

 When the drive shaft 7 is rotated by means of an elastic coupling, shaft 8 is driven into rotation. If there is no load, the coupling halves 1 and 2 will rotate at the same speed, as a result of which the rotor of the electromechanical angle sensor 9 will be at rest, and the arrow on the electromachine angle converter 12 will be at the zero mark of the scale 11. When a torque occurs on the driven shaft 8, the coupling 1 will begin to slip relative to the coupling half 2 and this will continue until the effective torque is balanced by the elastic forces of the elastic of these elements 3. With this slippage, the rotor axis of the electric machine angle sensor 9 will rotate, which is due to the presence of a rigid kinematic connection (gearing). The indicated displacement will occur due to electrical connection with the rotor of the electromachine angle converter 12, the arrow of which will fix the amount of displacement on the scale 11. And since the amount of elastic deformation is linearly dependent on the deforming force, the magnitude of this force will be fixed on the scale, i.e., the value torque on the driven shaft 8. (56) Copyright certificate of the USSR N 1303855, cl. G 01 L 3/00, 1987.

Claims (1)

 MOMENTOMER G.L. NIKULINA, comprising a coupling, consisting of half-couplings located on coaxially mounted driving and driven shafts, connected by elastic elements, and a torque meter, characterized in that gearing, consisting of two elements, two electromachine coal converters are introduced into it and rolling bearings, while the coupling half is kinematically connected by gearing, one element of which is rigidly fixed to one coupling half, and the other is located on the axis of the electric angle converter, rigidly fixed nnogo on the end of the other coupling half, the ends of each coupling half are set to interact with the rolling bearing, and the torque meter is configured as a second inverter dynamoelectric angle.

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