DE6604776U - DC OR AC TACHOMETER DYNAMO. - Google Patents

Description

© r.-lng. V. Hartmans
ι Berlin 12

Weimarer »traö« 2 DrH / H

Teletoni 38 2! «» 1041/61

Utility model

Johannes Hühner, factory of electrical machines,

1 Berlin 61, Planufer 92b

DC or AC tachometer dynamo

The hiring relates to one with one or more DC or AC dynamo equipped with galvanically separated systems to generate speed proportional voltages.

The generation of such voltages is used for example Solution of technical problems, furthermore with registration facilities, in analog systems, etc. * required here it is often necessary that the voltage output by tachometer dynamos follows the speed instantaneously and does not contain fluctuating interference voltages · It is known that mechanical oscillations cause harmonics in the tachometer voltage due to minor asymmetries in the coupling between the driving shaft and the tachometer dynamo cause · the voltage proportional to the speed of a direct current tacho dynamo to form the first or second Derived according to the time, these harmonics are used

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"Particularly annoying as it is the differentiated size distort.

Attempts have therefore been made to provide flexible couplings; In this case, however, so-called backlashes occur which lead to incorrect voltage dissipation, the faults of which are the same the NachoilMnkel of the two coupling halves.

Knowing these disadvantages, the move was made to rigidly couple the speedometer cable by engaging with the driving shaft on the stub shaft of the speedometer screwed flange attached and the housing of the speedometer machine by means of a holding device to rotate was prevented. The disadvantage of this design is however, in the fact that the weight of the speedometer machine causes an increased bending load on its own shaft stub. Since the speedometer machines emit two galvanically separated voltages in many cases and thus in one Machine two galvanically separated systems have to be accommodated, such aggregates result in relatively large Overall lengths by which the bending stresses of the shaft truncated are also adversely affected, others Disadvantages of such a so-called floating cultivation are that several centerings are required which are difficult to adhere to, so that in practice TJinaccuracies and axis misalignments between the Work shaft and speedometer cable are unavoidable "

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It is also known to assemble the tachometer dynamo with the working machine without a design To provide its own storage, such that the Taeho case attached to the housing of the working machine and the rotor äes iachodynamos on the "shaft journal of the working machine is attached »The disadvantages of such a design are ν, οη resulting from the internal clearance of the machine radial and axial relative movements of the rotor of the speedometer to the housing of the same, the harmonics have as a consequence.

Another, all previously known coupling option The disadvantage is that the shaft journal of the working machine is not <- as often required - to drive additional machines, for example from exciters, speed monitors, gearboxes etc., can be used.

· These and other deficiencies are essentially eliminated by the innovation, in that the shaft of the tacho dynamo is designed as a hollow shaft with its own bearing and is plugged directly onto the shaft journal of the respective machine, in particular it is wedged »The innovation achieves the following:

Elimination of any additional, previously required Coupling links of rigid or flexible design; the possibility of providing relatively large diameters,

short overall lengths, for example even with

f. two galvanically separated systems, surrender and large

Pole numbers can be used, which in turn has the consequence that any residual waves have high frequencies and can therefore be easily smoothed v / ground; easy clip-on mounting of the tachogenerators with its hollow shaft in the normal shaft journals of the respective work machine and Mitn e AHM of the moving parts of the r X ₁ tachogenerators such as by adjusting spring and groove;

Holding the dynamo housing by means of suitable, e.g. from brackets consisting of a fork and a bolt; possible use of the driven machine for driving other machines and devices by extending the journal through the hollow shaft of the Working machine

Other arrangements and details of the innovation genes from the following detailed explanation of an embodiment of the innovation O in connection with ^£: out 'of the drawing; in this show:

1 shows a tacho dynamometer installed on its work machine in a longitudinal section;

Fig, 2 shows a detail, namely the mounting of the housing of the speedometer on the work machine uiid

- 5 «.

. 3 and 4 the speedometer by itself in cross section and is longitudinal section.

Mt 1 is the new, hollow shaft of the "in the illustrated embodiment" example for Direct current specific dynamos "called this hollow shaft 1 carries the movable armature 2 with winding 3 and the collector 12; the anchor plate section with ') Hats can be seen from Figo 3.

The hollow shaft 1 can be offset at both ends in order to conveniently form or accommodate bearings for the stationary, advantageously multi-part housing 5 of the speedometer. In the illustrated embodiment, the bearings for the hollow shaft 1 consist of ball bearings. The housing 5 or its central part carries inwardly directed poles 7, wherein in the cross section according to I ¹ Ig. ; a six-pole machine is shown.

-The tachogenerator is - as seen from Figure 1 of the drawing -. ^I jnmittelbar, ie without using any coupling members of rigid or flexible type, attached to the stub shaft of the working machine 9. To hold the hollow shaft 1 on the stub shaft 8, it is advantageous to use the usual feather key-Eut connection 10 as shown in the right-hand part of the Pig. 1 serve. The wave

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butt 8 can be made so long, if necessary, that it can be used to carry other machines or devices or whose parts protrude from the housing of the Tachodynaiaos.

In order to prevent the rotary movement of the tachometer dynamo housing, a holder is provided which, according to Pig 1 and 2, can consist, for example, of a fork 11 and a bolt 13 that fits between its legs. ι In the illustrated embodiment forms the

Fork 11 part of the housing of the speedometer or is formed in one piece with one of its parts. A reverse or a different analogous one can also be used for this purpose Arrangement can be used. Several, I

ζ.Β, on the periphery of the speedometer and working

machine evenly distributed fork-bolt or similar Connections are provided.

The measures according to the innovation are both, v / ie explained, on direct current tacho dynamos and alternating current tacho dynamos applicable «In both cases, several galvanically isolated systems can be provided to take two or more independent DC or AC voltages from the dynamo.

Protection claims

4776

Claims (1)

f Sehutzanst> smells: DC or AC Taehodynamo with one or several galvanically separated systems, characterized in that the shaft of the Tachodynamo3 as a hollow shaft (1) with its own Storage formed and directly on the shaft journal (8) attached to the respective machine (9), in particular wedged on isty ο Tachodynamo according to Claim 1, characterized in that its housing is secured in a manner known per se by holding devices to prevent it from rotating. j 3 · Speedometer according to claim 1, characterized in that that the shaft journal (8) of the machine (9) for driving other machines or devices is extended so far that it from the housing of the speedometer - normal. 4776