SU845025A1

SU845025A1 - Measuring transducer of torque of screw propeller

Info

Publication number: SU845025A1
Application number: SU792808451A
Authority: SU
Inventors: Лариса Акимовна Андреева; Марина Олеговна Зюзликова; Евгений Семенович Осипов
Original assignee: Предприятие П/Я В-8662
Priority date: 1979-08-10
Filing date: 1979-08-10
Publication date: 1981-07-07

Description

(54) ИЗМЕРИТЕЛЬНЫЙ ПРЕОБРАЗОВАТЕЛЬ КРУТЯЩЕГО МОМЕНТА ГРЕБНОГО ВИНТА(54) MEASURING CONVERTER TORQUE MOTOR SCREW SCREW

II

Изобретение относитс к области силоизмерительной техники и может быть использовано дл определени крут щего момента гребных или воздушных -винтов.The invention relates to the field of load-measuring equipment and can be used to determine the torque of propellers or aerial screws.

Известное устройство дл измерени осевого усили и крут щего момента на валу гребного винта, содержащее узлы измерени осевого усили и крут щего момента, встроенные в вал в районе ступицы винта, не обеспечивает требуемой точности измерени 1.The known device for measuring axial force and torque on the propeller shaft, which contains axial force and torque measurement units, embedded in the shaft in the area of the screw hub does not provide the required measurement accuracy 1.

Наиболее близким по технической сущности и достигаемому результату к данному изобретению вл етс измерительный преобразователь крут щего момента гребного винта, содержащий встроенный в вал торсионный упругий элемент и св занные с ним магнитные системы дифференциального преобразовател перемещений в электрический сигнал 2J.The closest in technical essence and the achieved result to the present invention is a measuring transducer of the torque of the propeller, containing a torsion elastic element embedded in the shaft and associated magnetic systems of the differential transducer of displacement into an electric signal 2J.

Недостатком такого измерительного преобразовател также вл етс низка точность измерени , обусловленна вли нием изгибных деформаций упругого элемента от действи поперечных сил, действующих на вал со стороны гребного винта.The disadvantage of such a measuring transducer is also low measurement accuracy due to the influence of the bending deformations of the elastic element due to the transverse forces acting on the shaft from the side of the propeller.

Целью изобретени вл етс повышение точности измерени при изгибных деформаци х упругого элемента.The aim of the invention is to improve the measurement accuracy during bending deformations of an elastic element.

Указанна цель достигаетс за счет того , что магнитные системы размещены на , рассто нии ,,., 5 0,35+0.5 К ,This goal is achieved due to the fact that the magnetic systems are located at a distance, ,, 5, 0.35 + 0.5 K,

0, 0,

от крайнего сечени упругого элемента со сторонь воздействи изгибающих сил, где , и Ру - заданные значени to изгибакУщего момента и поперечной си41ы, действующих на вал со стороны гребного винта, а L - длина упругого элемента. На фиг. I изображен описываемый измерительный преобразователь, разрез; на фиг. 2 - вид по стрелке А фиг. 1; на фиг. 3 15 сечение Б-Б фиг. 2.from the extreme section of the elastic element, from the side of the impact of bending forces, where, and Py are the given values to bend and the transverse force acting on the shaft from the propeller side, and L is the length of the elastic element. FIG. I depicts the described measuring transducer, a section; in fig. 2 is a view along arrow A of FIG. one; in fig. 3 15 section bb FIG. 2

Измерительный преобразователь крут щего момента гребного винта содержит встроенный в вал торсионный упругий элемент длиной L, который образован из калиброванного участка вала 1 и балочек 2 (фиг. The torque transducer of the propeller contains a torsion elastic element of length L, which is built into the shaft, which is formed from a calibrated section of the shaft 1 and the beams 2 (FIG.

Claims

20 1-2), rigidly connecting the extreme cross sections of the shaft section. The beams are located concentric with the axis of the shaft and have a rectangular cross section (transverse), oriented by its highest bending stiffness in the radial direction. In the gap between the beams, two pairs of cantilever hangs from the extreme sections of the elastic element to its middle of the projections 3 and 4, which act as brackets for fastening the magnetic systems of the converter, are formed integrally with the shaft. In this case, ferrite cores with inductors 5 (Fig. 3) are fixed on one pair of protrusions, and ferrite cores without coils 6 (plates, closing magnetic fluxes) are fixed on the other pair, connected with the opposite section of the elastic element. Geometrical centers of magnetic systems are located at diametrically opposite points of the cross section of an elastic element at a distance of 5 K from the extreme section of the force, where K is a dimensionless coefficient that takes into account the distance from the bending vnt axle to the elastic element and numerical equals Here, Mc and Ru are the specified values of the bending moment and lateral force acting on the shaft from the side of the propeller, and L is the length of the torsion element. The inductances of the coils of each of the magnetic systems are included in the circuits of the LC-generators 7 and 8. The frequencies of these generators are shifted by the mixer 9. The differential frequency after forming on the front and amplitude by the shaping device 10 and the amplifier 11 is fed to a recording device. Under the action of the measured torque M, the calibrated section of the shaft 1 and the beams 2 experience torsional deformations. The projections 3 and 4 are displaced relative to each other. One of the air zzzop azz + o, 5k I 0. Phag.1 ov 5o between cores 5 and 6 increases, and the other decreases. As a result, the inductance of the generators 7 and 8 and the frequency of the electrical signal at the output of the amplifier 11 vary in proportion to the torque. By placing the magnetic systems on the ground a from the extreme cut of the elastic element, the integral value of the air gaps So in the magnetic systems will remain unchanged each of the transducer's generators and, as a result, the stability of the electrical signaling of its output during bending deformations of the elastic element. Claims of a torque converter of a propeller screw comprising a torsion elastic element embedded in the shaft and associated magnetic systems of a differential transducer of displacement into an electrical signal associated with it, in order to improve the accuracy of measurement of the flexural deformations of the elastic element magnetic systems. placed at a distance from the extreme section of the elastic element on the side of the bending forces, where, MM and P are the specified values of the bending moment and lateral force acting on the shaft from the propeller side, and L is the length of the elastic element. Sources of information taken into account in the examination 1 USSR author's certificate jVo 468114, cl. G 01 L 1/08, 1973. 2 USSR author's certificate No. 547658, cl. G 01 L 3/10, 19.12.75 (prototype).