SU393962A1 - PT B - Google Patents

Description

one

The invention relates to load-measuring equipment and can be used in automatic portion batching devices.

The known dynamometers containing several transducers of efforts into an electrical signal, the shells of which are located on a common base plate and associated with a common transducer, have insufficient accuracy due to the influence of the tangential component of the force and the unequal sensitivity of each transducer.

The proposed dynamometer improves the measurement accuracy due to the fact that it is equipped with a power-receiving ball placed in the upper part of the traverse with the possibility of rolling along it in a horizontal plane, and the traverse is installed through prisms on the converter housings, each of which is located on the base plate on two prismatic supports, one the support is fixed and mounted coaxially with the transducer, and the other is movable and is connected to the plate with a micrometer screw.

FIG. 1 shows a dynamometer, a general view; in fig. 2 a section A-A in FIG. one; in fig. 3 is a section along BB in FIG. one.

The dynamometer consists of two identical housings 1, made in the form of a bracket, in which the force transducers in

electrical signal 2 of transformer type with two mutually perpendicular windings (magnetizing and signal). The converter is fixed in the cavity of the bracket 5 by means of a pressure screw 3 and a lining 4 with a ball 5. The housings are mounted on the base plate 6 along its longitudinal axis. In addition, each housing is installed in the two prismatic supports 7 and 8. The support 7, located coaxially with the converter, is fixed and made with the sole of the bracket as one unit. Its blade is installed in the groove of the triangle of the profile of the pillow 9, which is made in the plate 6. The support 8, which is movable, rests in the cylindrical groove of the support plate. The lower part of the prism has a cylindrical surface, which contributes to its self-alignment in the chute. Both moving

The prisms are rigidly connected with each other by an adjusting pull 10, which is made with right and left threads. T ha, with a smooth cylindrical end, is sunk into the blind hole of the rod 11, which is fixed in the right side

5 base plate. In addition, the rod is connected to the rod with a pin 12. Such a connection provides for the actual movement of the rod during rotation of the rod. On the left side of the plate 6 is fixed the adjusting screw 13, which is associated with the near-movable support B.

Both the AND rod and the screw 13 do not have displacements along the longitudinal axis, and only allow rotation around this axis. In the upper part of the dynamometer, the yoke 14 is installed with two prisms 15 and 16 at the ends. The yoke with its ends rests loosely on each body. The prism 15 on the left shoulder of the crosshead can be self-adjusting relative to the vertical, and the prism 16 on the right shoulder relative to the horizontal longitudinal axis. To do this, on the left shoulder of the traverse there is a row of vertical cylindrical holes, and on the right shoulder a longitudinal cylindrical chute. The przma 15 is fixed on the traverse with a pin, and the prism 16 is resting in the groove. At the top of the traverse there is a contact ball 17 with the possibility of rolling along it in a horizontal plane.

The measured force P acts on the contact ball and, through the support prisms, the crosshead is transmitted to the shells. Each body is deformed by the action of the force attached to it. The presence of body deformation leads to elastic deformation of the magvito-elastic converter. The output windings of the transducers after calibration are connected in series, therefore the total voltage at their terminals is proportional to the measured force. Changing the sensitivity of the dynamometer and obtaining the required measurement range is provided in each particular case by moving the reference prisms of the crosshead and the reference prisms of the bodies with their subsequent fixation. Calibration dynamometer lead so that the sensitivity of the right and left magnetoelastic transducers were the same. To do this, first install the support prisms of the crosspiece, thereby setting the measuring range. With the prism position shown in FIG. 1, the measurement range will be minimal, but the sensitivity of the dynamometer as a whole is maximum. Then, turning the adjusting screw 13, move the left movable support 8, change the ratio of the shoulders - and

about

thereby selecting the desired sensitivity of the left transducer. After that, the screw 13 stops and calibrates the right transducer, rotating the rod 11. Thanks to the pin 12, the rotation is transmitted to 10, which leads to the displacement of the right mobile support 8 and to a change in the sensitivity of the right transducer. The stem is then locked, and the signal windings of the transducers are connected

consistently and according to.

If the locking of the screw 13 and the rod 11 is secure, the distance k between the movable prisms will be constant. This ensures the constant sensitivity of the dynamometer.

practically at any ratios of shoulders, traverse sy /. The sensitivity of the dynamometer does not change if, with a constant shoulder k, there will be a joint shift of the supports 8 to the right or left.

This leads to an increase in the sensitivity of the other. Since the absolute races of the increments will be equal, but the sign is opposite, the total sensitivity of the dynamometer is not

will change.

Subject invention

A dynamometer containing several force transducers into an electrical signal, the shells of which are located on a common base plate and are associated with a common force-traverse beam, characterized in that, in order to improve the measurement accuracy, the ball is provided with a power-receiving ball placed in the upper part of the beam with the possibility of rolling horizontal plane, and the traverse is installed through the prisms on the converter housings, each of which is located on the Hia base plate of two prismatic supports, one support is Vision, and it is coaxial with the transducer, and the other - the mobile and bound to 1PLITOY micrometer screw.