SU13359A1 - A method and apparatus for measuring angular velocities close to zero and for reducing any angular velocity of the shaft to a measurable - Google Patents

Description

In the proposed method, an algebraic sum of the angular velocity of the test shaft and angular velocity is transmitted from a completely independent source to the marking device.

In order to implement this method, in the proposed device, a differential gear is engaged between the test shaft and the marking device, and the axis of the middle roller is driven by a completely or partly independent source.

In the schematic drawing of FIG. 1, 2 and 3 depict the differential gear in unfolded form; .fig. 4 is a side view of the instrument boron in partial section: FIG. 5 is a partial section of a modified device; FIG. 6 is a section on a in - in FIG. five; FIG. 7-type diagram of the installation of the device.

The essence of the method is as follows: an additional angular velocity + O, which superimposes on the angular velocity of the test shaft, is communicated from an independent (partly or completely) source, and the algebraic sum of these angular velocities is transmitted to the marking device.

This makes it possible to perform readings at an angular velocity of the test shaft, close to zero. In the same way, by changing the size and sign of O as desired, it is possible to make measurements without removing the number of rotations at large revolutions.

FIG. 1, 2 and 3 are shown deployed on a differential gear plane. Here jd is the wheel connected to the test / shaft, B-rabbit sitting on the C axis, D is the wheel connected to the marking device. If a circumferential speed is reported from the test shaft to wheel A: + 7 (, then with non-moving C axis of roller B, wheel D will receive speed (Fig. 1). If C axis of Fig. 2 reports speed + v (coinciding in direction with FJ, then wheel speed D will be: v or Ж - (FO - 2 v). If the C axis reports speed - V (Fig. 3), then wheel speed D will be: V - 2 vнli W - (FO + 2 v), or , summarizing both formulas and simplifying signs:

TF (F + 2v) ...... (3)

And since the speed (circumferential) is proportional to the angular velocity m, then formula (3) is equivalent to the formula:

s ("+ i)

where 8 is some constant non-transmission.

FIG. 4 shows a general view of the device. Here A is a wheel, friction or gear, connected directly or by some kind of drive with the test shaft. Roller

sits in the C axis, which is inserted into the cage E, rotating around the x - x axis, common to the wheel A D. D. The clip E receives movement from a source independent of all or part of the test shaft. Wheel D "goes on the shaft F, from which the marking device T receives movement.

The device can be carried out either with a conical or with a cylindrical gear. Rollers can also be one, two or more. In the same way wheels can be either gear, or smooth (frictional).

FIG. 5 shows a modified device in which the wheels are cylindrical, gear; the rollers B are four pieces; the clip E, also gear, is driven by the means of the gear drive.

FIG. 7 shows a general scheme of the installation of non-transmission in FIG. 5. Here is the M-motor (independent source of rotation of the clip E), which rotates the clip. by means of

gear J, a H - test shaft directly connected to the shaft of wheel A.

The subject of the patent.

1. A method of measuring angular velocities close to zero and reducing any angular velocity of the shaft to a measurable one, characterized in that an algebraic sum of the angular velocity about the test shaft and an additional, superimposed angular velocity H; O from completely or partly independent source, so that the angular velocity transmitted to the marking device is about O, (Figs. 1, 2, 3).

2. A device for the implementation described in paragraph 1 of the method, characterized in that a differential gear is engaged between the test shaft and the marking device T, the axis of the middle roller In which is movable from an entirely or partially independent source (Fig. 4, 5, 6, 7).

FIG. S

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FIG. 3

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