Vorrichtung für einen unterbrechungsfreien mechanischen antrieb, insbesondere einer pumpe

The invention concerns a device for an no-break mechanical drive, in particular a pump, with an output shaft for the mechanical drive, with a combustion engine and with an electrical machine connected with the output shaft.

In order to be able to propel pumps freely from inadvertent interruptions with the help of an electric motor, it is well-known from the state of the art to place to these pumps emergency power generator to the side with which in case of failure the external power supply the Etektromotoren of the pumps can be further operated on the basis the power supply of the emergency power generator. Unfavorably with such devices is among other things the constructional expenditure for this, because at least two electric motors - one the pump and the emergency power generator assigned - are to be planned. This is in particular cost-intensive with pump drives with increased capacity comparatively. In addition comes that with the well-known devices substantial fluctuations in the pumping deer number cannot be excluded, for example because a rated output of the electrically attached emergency power generator not directly in case of failure the electrical power supply be available can.

The invention placed itself the task to create on the basis of the initially described state of the art a device with which in case of a loss of the external power supply an no-break drift can be ensured. Besides the constructional expenditure of the device should be low comparatively small and the manufacturing costs.

woll tQ oll Gross Domestic Product llo tons oll oo the invention solves the task posed by the fact that the device exhibits a clutch for optional connecting of the combustion engine with the Abtriebswelie between the combustion engine and the electrical machine and that between clutch and output shaft $chwungrad is intended, which is stored on the Antdebswelle common with the electrical machine exhibits the device a clutch for optional connecting of the combustion engine with the output shaft between the combustion engine and the electrical machine, then knows well-known measures an integration of the emergency power generator with the driving side of the device is created, with which the constructional expenditure can be reduced. Between clutch and output shaft even if a flywheel is then planned, can be ensured in case of failure to the external power supply an no-break drift contrary to the state of the art, because up to the assumption of the drive by the combustion engine this drive electric drive is balancable by the inertia of the flywheel. In particular however the changed drive characteristics of the electrical machine arising as a result of the electrical collapse can be kept far and/or reduced by the drift, as the flywheel on the drive shaft common with the electrical machine is stored. The flywheel works thus not only in relation to the drift compensatorily, but comparison-moderately also the drive self-work of the electrical machine during ko] labierender power supply, so that contrary to the state of the art can be made possible in case of failure for the power supply a particularly even drift. In addition a particularly compact and concomitantly economical device can be created by the arrangement of the flywheel, because the flywheel on the electrical machine can be constructionally simply developed. Likewise as a result of it also a increased stability of the electrical machine can arise. The device according to invention can itself from there not only by its working reliability with the no-break drift but also by its comparatively favorable costs out RK, • oe ul ql, o O, gt, • B [...] • , Al J O 41, 08 • OO0 QO la draw, which can arise among other things also as a result of one in relation to solutions with emergency power generators decreased maintenance costs.

If a common bearing of the drive while takes up camp forces on the one hand from the flywheel and on the other hand from the rotor of the electrical machine, then a flywheel developed on an electrical machine can provide for substantial structural compactness at the device. Besides the Wartungsfreundlichkeit of the electrical machine can be still further increased due to these common Lagerstelte.

Simple construction conditions result, if the flywheel is arranged in the range at least one the Werlenlager of the electrical machine, because without eLne own storage of the flywheel can be done in such a way.

As generator for the power output for an no-break electrical supply with propelling if the electrical machine serves the output shaft with the combustion engine, the constructional expenditure of the device can be decreased, because for example without additional energy stores for supply at least can be done to the electrical controlling of the device. In addition so the device can be consulted also as generators for other electrical consumers, so that the device for an no-break mechanical drive can be consulted and at the same time also for an no-break electrical current supply. The device according to invention can stand out from there in particular by its versatile applicability opposite well-known devices.

A simple electrical Anschtussmöglichkeit to an electrical supply network can result, if the electrical machine is implemented as synchronous machine.

om°t Qö DD06 o °o °ao4 40o A too D • OD • • 40 IO the constructional expenditure of the device still one continues to reduce, if for the formation of a particle separator the cooling air of the electrical machine is at least partly sucked in by the housing of the flywheel. The housing of the flywheel works thus in connection with the rotary flywheel in the kind of a separator, for example for fixed parts, which can appear as impurities of the cooling air, so that a possible contamination of the electrical machine can be decreased.

If the output shaft is designed as flexible joint wave, a possible transient behavior can be kept far during abrupt loss the external power supply by the drift. A danger of a possible damage of the customers connected mechanically with the output shaft can be reduced in such a way. For this itself connection-possible knows a flexible cardan shaft particularly to distinguish for simplifies.

In the figure the invention article is for example on the basis a remark example schematic and partly broken represented.

For example a device is pointed to the no-break mechanical drift, which exhibits an output shaft 1 and a combustion engine 2 as well as an electrical machine 3. The electrical machine 3 can be operated as engine or generator. Between the combustion engine 2 and the electrical machine 3 an electromagnetic clutch 4 is intended. The combustion engine 2 attaches 5 with its motor shaft to the clutch disk 6 of the electromagnetic clutch 4, whereby the other clutch disk 7 is connected with the drive shaft 8 of the electrical machine 3, so that depending upon operating mode on the basis the electrical control 9 the combustion engine 2 with its motor shaft 5 can be connected by the drive shaft 8 of the electrical machine 3 with the output shaft 1 mechanically.

*U UO IO0,4 04 Qe 04 for the controlling of the operating mode is connected the control 9 with the electrical machine 3, the clutch 4 and the Verbrennu'ngsmotor 2. Between clutch 4 and output shaft 1 according to invention a flywheel 10 is intended, which is stored on the drive shaft 8 of the electrical machine 3. Thus the flywheel 10 can be used as mechanical reconciliation of Drehzahländerungen, in order to be able to provide in such a way for an no-break drive of the Abtriebswelte 1 in case of a loss of the external power supply for the electrical connections 11 of the device, in particular the electrical machine 3, which both with the drive of the output shaft 1 by the electrical machine 3 can be, and with the drive of the output shaft 1 by the combustion engine 2 of advantage.

The flywheel 10 is arranged in the range of the Wellenlagers 12 of the electrical machine 3, so that simple construction conditions develop. Because here a common Lagerstelte 18 can be formed as the admission of the camp forces of flywheel 10 and only andeutungsweise represented rotor 19 of the electrical machine 3. It knows itself such a flywheel developed on the electrical machine 3! 0 results in, what leads to a compact construction unit.

To the further Wellenlager the electromagnetic clutch 4 attaches 13 of the electrical machine 3. The output shaft 1 is trained as flexible joint wave, around between the operatings mode of the electrical machine 3 (Motorbzw. To absorb generator operation) possibly arising mechanical oscillations, what was not more near represented however.

In case of propelling the output shaft 1 with the combustion engine 2 the electrical machine 3 is operated as generator, in particular as synchronous generator, so that on the basis its achievement production at least the electrical control 9 of the device can be supplied with electrical achievement. Aul rdem knows thereby the device beside an no-break mechanical drift an no-break electrical achievement supply guaranteed.

O'glIn1D O O°ja1p I°°o 'u1 I'OO0 'I°QgU1 P the cooling air sucked in by the electrical machine 3 is led by the housing 14 of the flywheel 10. Thus the cooling air can be cleaned by impurities, which can be delivered in further consequence over openings in the housing 14, not represented more near. An additional filter 15 provides for the further cleaning of the sucked in cooling air, so that the device can be operated independently of the place of assembly. Besides a further filter 16 is intended, in order the cooling air from the electrical machine 3, needed for the Kühtung of the clutch 4, cleaned would drive on to be able. In addition a world camp 17 intended for the motor shaft 5 is after the clutch 4.

*g°o o p e°n°9 Iue°o o°°a olmo I • Odi • ng 00 QO IO