DE8101146U1 - Electric multiple drive for mechanical machines - Google Patents

Description

Title:

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Zuback:

Description of the invention Electric multiple drive

The invention relates to the arrangement of one or more additional electric drives on mechanical machines (e.g. blowers, pumps, lifting systems) which are firmly, elastically or switchably coupled to one another. If an electric drive fails, the power flow to the mechanical machine is manually controlled or automatically produced mechanically or electrically for an additional drive, in particular for the largely or completely uninterrupted operation of mechanical machines and arrangements, such as fans, blower burners, pumps and pump systems of all kinds for conveying, circulating, pressure increasing, etc., elevators and lifting systems for conveying loads and people.

Mechanical machines with electrical drives depend on the uninterrupted supply of electrical energy for their functionality and operation. If the energy supply fails, the mechanical machine will inevitably fail and thus the required function will be lost.

For functions with a higher sensitivity to failures due to interruption of the electrical power supply, e.g.

- in üJahn building's heating system

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State of the art technology:

Criticism of the
Status of the
Technology:

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- in building ventilation and air conditioning systems _for lifting and hoisting systems

- in production buildings, smoke extraction and waste disposal _systems

continued operation of these functions is necessary in order to fully or partially maintain the usability of the buildings or facilities until normal electrical energy supply is restored or to be able to carry out emergency work in disaster situations (e.g. fire, flooding, uncontrolled release of dangerous substances and media).

The established and proven technology of backup power supply, e.g.

- in signal, telecommunications and data processing systems: using power storage (accumulators)

- for electrical machines and fluorescent tube lighting: by means of power generators driven by combustion engines (generator sets),

As a rule, it is assumed that the network conditions (type of current, voltage, frequency) of the normal power supply will be restored, simply from a diverting energy source. However, this requires considerable expenditure on equipment and control technology, as the necessary investments must take into account:

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large power to be achieved because the to be achieved is not primarily restricted

Depending on the sensitivity of the electricity consumers to be supplied, high demands are placed on the duration and electrical characteristics of the supply interruption and the consistent quality of the network replacement

When replacing the grid using energy storage, high demands are placed on the converter systems if the consumers cannot directly take on the type of current and voltage offered by the storage system*

Task!

The invention is based on the task of being able to continue operating the mechanical machines that are absolutely necessary for the usability of buildings and machine functions in the event of a power failure, either with their normal performance data or with a reduced performance sufficient for emergency function.

Solution:

This object is achieved according to the invention in that mechanical machines, in addition to their electrical drive for supply from the mains for normal operation (e.g. from the single-phase network 20 V, 50 Hz), receive a further electrical emergency drive for supply from the mains emergency power supply (e.g. from a power storage accumulator with direct current 1Z U).

More out?
design of the
Invention:

In order to ensure that the normal supply of electrical energy is interrupted,

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In order to be able to continue using the drive, according to a further development of the invention, the second drive works on a common drive line. The second drive can be connected to the drive either permanently or via a coupling, in particular a switchable one; in the case of the switching clutch, the power connection of the emergency drive to the machine to be driven is only established when the emergency power supply is applied. The switching clutch itself can be used for manual operation or for mechanical (e.g. centrifugal switch) or electrical excitation (e.g. undervoltage relay, magnetic clutch).

In addition, according to a further development of the invention, the directly coupled emergency drive in the form of a suitable DC motor can continuously or temporarily generate the charging current during normal operation to buffer a power storage unit and thus ensure constant operational readiness for emergency operation.

In addition, according to a further embodiment of the invention, the clutch of the emergency drive can stimulate the switching or control means to switch from generator (charging) operation to battery operation of the direct current battery.

Achievable advantages:The advantages achieved by the invention

consist in particular in the fact that instead of

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of a replacement of the mains current with the same current and voltage , with the inevitable high investment and precision requirements, only the sensitive machine functions are additionally provided with a permanently or switchably coupled emergency drive, which is fed with the required performance data of the mechanical machine for emergency operation in the event of a power failure via a network from a relatively small current storage device and, acting on the common source of the drive, maintains the machine function in a simple manner*

Description of

Execution-

Examples:

Oil example 1 - Fan burner for healthy oil heating systems

According to the state of the art, the fan of a heating burner is driven by an electric motor flanged to the side. On the counter-drive side, the electric motor carries the fitting for the gear oil pump, which is driven by the shaft of the electric motor via a plug-in coupling.

According to the invention, for example, the light of the electric motor can be extended beyond the fan wheel of the heating burner. On the opposite side of the fan wheel,

••■the two ¹ electric motors for the '''emergency drive' are elastically coupled,

* firmly flanged and coupled (bearing of the fan wheel can be omitted) or

* be connected via a switchable clutch^, so that the coupling of the emergency drive rotor

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--.. with the fan control only when supplied with mains backup energy.

Example 2 - Circulation pumps for heating systems

In contrast to example 1, in this example the pump wheel replaces the GsblMserad.

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Claims (3)

sayings 1. Electric multiple drive for mechanical machines, characterized in that the mechanical machine (1) receives, in addition to the electric drive motor for normal operation (2), a further electric drive motor for low-voltage operation (3), which is supplied with electrical energy (direct current) from a power storage device &bgr; emergency power battery (it). 2. Electric multiple drive for mechanical machines according to claim 1., characterized in that the electrical ^drives (2 + 3) and the mechanical machine (1) are arranged in a line and their non-positive connection is fixed via a common main line or via an elastically coupled line (5) or via a secondary line connected by means of a switchable coupling (6). 3. Electric multiple drive for mechanical machines according to claim 2., characterized in that switching means (7) are provided, by means of which the direct current motor (3) can be operated in generator mode as a charging generator for the emergency power battery (U) during mains operation.