SU958883A1

SU958883A1 - Device for measuring torque

Info

Publication number: SU958883A1
Application number: SU813242383A
Authority: SU
Inventors: Юрий Дмитриевич Бердоносов; Леонид Семенович Григорьев; Геннадий Болиславович Жевна; Ирина Викторовна Литвинова
Original assignee: Предприятие П/Я А-1216
Priority date: 1981-02-03
Filing date: 1981-02-03
Publication date: 1982-09-15

Description

(54) УСТРОЙСТВО ДЛЯ ИЗМЕРЕНИЯ МОМЕНТА ВРАЩЕНИЯ(54) DEVICE FOR MEASURING THE ROTATION MOMENT

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Изобретение относитс к измерительной технике и может быть использовано, например , дл измерени момента вращени шаговых электродвигателей.The invention relates to a measurement technique and can be used, for example, to measure the torque of a stepper motor.

Известно функциональное устройство дл измерени момента вращени , содержаще .е тормозной щкив, фрикционные колодки и рычаг 1.A functional device for measuring the torque is known, comprising a brake jaw, friction pads and a lever 1.

Однако это устройство не обеспечивает требуемой точности измерени .However, this device does not provide the required measurement accuracy.

Наиболее близким по технической сущности и достигаемому результату к предлагаемому вл етс устройство дл измерени момента вращени , содержащее ма тниковый измерительный механизм со щкивом , св занным посредством нит ного тормоза с входным щкивом 2.The closest in technical essence and the achieved result to the proposed is a device for measuring the torque, which contains an attendant measuring mechanism with a cheek connected by means of a nit brake with the input cheek 2.

Недостатком такого устройства также вл етс низка точность измерени , обусловленна возникновением при сухом трении фрикционных пар так называемых скачков, возбуждающих релаксационные колебани измерительного узла устройства.The disadvantage of such a device is also low measurement accuracy due to the occurrence of friction pairs of so-called jumps during dry friction, which induce relaxation oscillations of the measuring unit of the device.

Цель изобретени - повыщение точности измерени .The purpose of the invention is to increase the measurement accuracy.

Указанна цель достигаетс тем, что в устройство введен дополнительный щкив.This goal is achieved by inserting an additional pinch into the device.

расположенный в плоскости вращени остальных щкивов и свободно установленный на оси, расположенной на пр мой, проход щей через оси указанных щкивов, а входной щкив снабжен двум параллельными канавками, лежащими в плоскост х, перпендикул рных его оси, причем щкив измерительного механизма и дополнительный шкив соединены нитью тормоза, котора дважды охватывает расположенно ный между ними входной щкив петл ми одинакового направлени , размещенными в указанных канавках.located in the plane of rotation of the remaining shchivki and freely mounted on an axis located in a straight line passing through the axes of said shchivs, and the entrance shchik is provided with two parallel grooves lying in planes perpendicular to its axis, the measuring mechanism shchiv and the additional pulley the thread of the brake, which twice covers the entrance shchik located between them by loops of the same direction, placed in the indicated grooves.

На фиг. 1 приведена кинематическа схема предлагаемого устройства; на фиг. 2 устройство , аксонометри .FIG. 1 shows the kinematic scheme of the proposed device; in fig. 2 device, axonometrics.

Claims

The device for measuring the torque of rotation contains the input shchik 1 of the micro-electric motor under test, thread 2, additional freely rotating pulley 3, the chuck of the measuring mechanism 4, 20 the measuring arrow 5, the load 6 and the cut-off bar 7. The thread 2 and the arrow 5 are rigidly connected to the cheek 4. Two parallel grooves (Fig. 2) are formed on the entrance shchikov 1, which lie in the planes perpendicular to its axis. The width of the grooves is equal to or greater than twice the diameter of the brake thread, which twice covers the input pulley 1 with loops of the same direction. The device works as follows. During the rotation of the pulley 1 of the micro-motor being tested, the center-to-center distance between the pulleys 1 and 4 is changed (increased) with the help of a special mechanism for changing the tension of the thread (not shown). Due to the tension of the thread 2, between the latter and the pulley 1, a friction force arises, which has a braking effect on the pulley 1. Due to the friction, a tension difference occurs between the upper and lower parts of the thread 2, which in turn creates a torque applied to pulley 4 in the places where thread 2 is attached to it. This moment of rotation rotates pulley 4, and along with it arrow 5. Torque applied in this way to pin 4 is automatically balanced by the moment of force of the weight of the load reinforced on the needle part of the measuring arrow 5. Nat The thread 2 is carried out until the rotation of the pulley 1, and hence the rotor of the tested microelectric rotor, from synchronization. At this moment, the torque on the scale 7 is measured. The use of an additional pulley and grooves in the input pulley in the device eliminates distortions in the bearings of the tested micro electric motor with any tension on the thread, and refuses dry friction, replacing it with lubricant between the thread and the input pulley, and thereby reduce the relaxation oscillations of the measuring unit of the device and improve the measurement accuracy. The invention The device for measuring the moment of turning, containing an intervening measuring mechanism with a pulley connected by means of a nit brake to an input pulley, characterized in that, in order to improve the measurement accuracy, an additional pulley is inserted in it, located in the plane of rotation of the remaining cheeks and freely mounted on an axis located on a straight line passing through the axes of said pulleys, and the input pulley is provided with two parallel grooves lying in planes perpendicular to its axis, the pulley and The measuring mechanism and the additional pulley are connected by a brake thread, which twice covers the input pulley located between them with loops of the same direction placed in the indicated grooves. Information sources. taken into account during the examination 1. Potapov L. A. and others. Measurement of the wind: the torque and rotational speeds of microelectric motors. M., “Energie, 1974, p. 59-60.

2. Potapov L. A., et al. Measurement of torque and speed of rotation of microelectric motors. M., “Energie, 1974, p. 60-61, fig. 4-2 (a) (prototype).

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