DE2126292A1 - Precession drive - Google Patents

Description

DESCRIPTION. Drive with continuously variable output speeds and torques.

These processes are based on the precession movement known from mechanics, which arises when an external torque acts on a gyroscope, in connection based on an electronic regulation.

Gearboxes with drive motors that are similar in their effect are known However, depending on the type of gearbox, they have disadvantages such as: limited speed and power range, Complicated mechanical structure and thus heavy wear and tear on the power-transmitting, moving parts, high manufacturing costs, unfavorable efficiency curve outside narrow application limits, etc.

The advantages of those based on the precession movement, below The drive described in more detail is, among other things, a simple mechanical structure, no force-transmitting, mutually moving parts, low manufacturing costs b practically no wear, simple electronic control enables convenient speed selection and remote control, the power range goes beyond the conventional one with direct output Infinitely variable transmission, for large speed and power ranges, can be more indirect Output via spur gears or planetary gears can also be used can be used for general control purposes due to the electronics used smallest tolerances are observed.

Physical basics: If an external force is constantly acting on a high-speed, symmetrical top outside the center of gravity, its angular momentum axis deviates perpendicularly depending on the direction of this force and takes the figure axis with it (mutation-free top).

The mathematical relationship is (vertical arrangement of # and ## can thus be influenced with ## with constant # and #.

For a better understanding of the drive described in more detail below, it makes sense to take a closer look at two peculiarities of the processional movement: 1.) The processional movement is hindered by spring force P according to Figure 2.

The force P must be absorbed by the obstacle (spring).

After the spring force has built up, the gyro body behaves under the influence of the weight G as if there were no gyroscopic effects at all would be and move on the line of action of G.

2.) At the beginning of a precession movement, due to the mass moment of inertia ### that is always present in relation to the precession axis, a moment of acceleration Mb must be overcome.

A general increase in the acceleration torque Mb can also be used Torque M @ counteract the precession movement.

Summary.

The precession angular velocity ## is dependent from ## - ## due to the constants ####.

Practical execution.

The precession drive working according to this principle is now structured as follows (Fig. "): The @@@@@@ is @@@@@ an external bearing motor (a) @@ gest @@@ Roll according to the required masses @@@ gkeitsmoment ## is designed. The supply of the electrical @@@@ follows via slip rings (b).

The outer rotor a) is tiltable and is supported by a spring (c) held in a certain position to keep the state of the horse in a certain position. An electromagnet (d) he creates A lever system (e) reinforces the respectively required outer at point I. Force p. I) a only transfer static forces be working the system is mechanically inert.

By using the lever system, the E-Magnet can be increased in size be kept small, in addition, insbesorldere is in a version with direct current, thus the electromagnetically induced time delay is low.

The precession drive is electronically controlled according to the following scheme: An electronic tachometer (f) determines the actual value.

A transistor controller (h) compares this with the one on the setpoint generator (g) set setpoint. The changed manipulated variable is amplified (i) to the Electromagnet (s) given.

This means that a certain range ## can be used with a changed decrease in output torque ## can be regulated via an adapted gyro torque ##.

Example: Precession drive with stepless speed setting, setting range 1: 6, direct output, external rotor motor (n = 3000 rpm, N = 15 I> S), output speeds 700 to 120 rpm 1) Determination of Jd Md at ## min is selected in such a way that, as shown in Figure 3, the working area is used as follows: Md = 2 Mt ## min mix # = 2 # 3.14 x 3000/60 = 314 1 / s #pmin = 2 x 3 , 14 x 120/60 = 12.56 1 / s Selected dimensions of the rotor body: 16 cm, 4 = 11 cm, h = 8 cm 2) Maximum required gyroscopic torque Md at 3) Maximum required force PI at point I (Fig. 4) / lever arm, 1I = 0.35 m) PI = 1250 / 0.35 = 3500 Kp 1) Force PII to be applied by the electromagnet at point II (Fig. 4) below Use of a lever system consisting of a movement screw at position 1 (trapezoidal thread DIN 103, 24 mm #) in connection with a lever arm 12 = 0.3 m.

This results in a pole area of approx. 6 cm².

Conclusion: For greater performance and speed ranges, you can the forces that then occur are transmitted by means of a lever combination lever arm / screw / wedge will.

The speed of the external rotor motor can also be nested two motors can be increased to 6000 rpm.

In addition to these measures, a spur gear is connected downstream s be. ¢ or a planetary gear with one or two drives and one output always possible.

Claims (3)

Patent claims: Process for generating continuously variable output speeds and moments, characterized in that: 1) a nutation-free top can be tilted attached w 2) a depending on the desired precession speed t #p electronically determined, electromagnetically generated and possibly via a lever system increased external torque acts on this gyro. 3) the precession axis represents the output shaft and the bearing of the precession drive takes over. 1) Use of this procedure for drive and control purposes