SU43942A1 - Device for uninterrupted power supply by direct current of electrical installations - Google Patents

Description

The present invention relates to a device for the uninterrupted power supply of electrical installations, in particular, telegraph and telephone exchanges, in which a direct or alternating current generator is used, normally driven by an electric motor fed from a network sitting on the same shaft.

In the event of a power failure of the electric motor, all the generator-motor units automatically interlock with the shaft of the internal combustion engine.

In order to automatically start the latter on the shaft of the specified aggregate — generator — electric motor — mounted flywheel, the flywheel moment of which is designed so that under the action of the inertia forces of the aggregate, the internal combustion engine can be driven to the required speed to start it one engine to another would ensure normal generator operation.

In FIG. 1 shows the electric circuit of the device proposed and FIG. 2-part of this scheme.

According to the above mentioned device, it mainly consists of a constant or alternating current generator 1 (Fig. 1), directly supplying power (259)

This enterprise, the electric motor 2, operating from the network, and the internal combustion engine 3.

All three machines are installed on a common base plate. Both electric machines / and 2 are interconnected by a deaf elastic coupling 5, and with the internal combustion engine 3 by means of a friction clutch 6, fitted with a adjustable lever 7. On the shaft of the unit is a generator-engine-mounted heavy flywheel 4. In case of normal operation of the generator 7 From the electric motor 2, the internal combustion engine 3 is disconnected from the shaft of the electric machines, as the adjustable lever / friction clutch b is held in the position "uncoupled by means of the prong 9 of the lever 8. The said lever 8 descends down under the influence of tension spring 11, but normally held in its upper position due to the fact that the armature 10, mounted on the lever 8, is attracted by the electromagnet 13, the winding of which is powered through the wires 14 and 15 from the power supply. At the same time, the valve of the heat-conducting tube connecting the fuel tank 20 with the power supply elements of the engine 3 is in a closed state due to the electromagnet 19, which holds the lever 16 in the upper position by the attraction of the core 17 placed at the end of the lever 16.

The winding of the electromagnet 19 is also powered by the same wires 14 and 75 from the mains. :

For opening, if necessary, the circuit of the electromagnet 13 provides a switch 21, and the circuit of the electromagnet 19 provides a switch 22.

At the time of the termination of the supply of current by the electrical network, the voltage on the wires 14 and 15 disappears and the electromagnet 19 is energized. Tensioning the spring 18, the lever 16 goes down and opens the fuel valve, as a result of which fuel begins to flow from the tank 20 into the power supply units of the engine 5.

At the same time, the electromagnet 13 is also deprived of excitation, as a result of which the lever 8 pulls the spring 7 / down and its tooth 9 slides off the end of the adjustable lever 7.

Under the influence of the spring 72, the lever 7 transfers the clutch 6 to the clutch position, as a result of which the shaft of the internal combustion engine engages with the inertia rotating shaft of electric machines.

The inertia force of the rotating masses of the electric machines 7 and 2 of the flywheel 4 of the engine shaft is set to rotate and the engine is set in motion. The dynamo 7 continues its work, now receiving mechanical energy from the internal combustion engine 3.

Since the internal combustion engine comes into action earlier than the shaft of electric machines, equipped with a heavy flywheel, has time to stop, the generator 7 has virtually no interruption in operation from the moment the current supply is disconnected from the mains until the internal combustion engine 3 comes into operation and therefore the supply of current to the telecommunications occurs without interruption.

When the power supply is restored, the unit is again switched to work from the electric motor 2; The motor 3 is disconnected from the shaft of the electric machines, stopped and the entire system of automatic machines is reset.

In order to force the entire system to operate if the voltage on the wire 24 only disappeared, the wire that supplies power to the electromagnets 19 and 75, coming from the AC power cord 14, is connected to the relay 23 (FIG. 2), the winding of which, in turn, comes to wires 14 and 24.

In this case, the relay 23 will release the measles, as a result of which the circuit of electromagnets 13 and 19 will be open, which will lead, according to the previous, to switching on and starting the internal combustion engine.

The proposed device can be applied:

1) to power the telephone urban and long-distance stations of large and medium capacity,

2) to replace the motor-lighting and backup batteries in the telegraph stations.

In addition, the proposed device can be applied in all cases when it is desirable to carry out uninterrupted power supply, for example, for some electrochemical production, theater lighting, medical institutions (operating rooms), etc.

The subject matter of the invention.

1. A device for uninterrupted power supply of electrical installations, in particular, telegraph and telephone stations, using a dc or ac generator driven by an electric motor and which can be automatically coupled with an internal combustion engine in the event of a power failure of an electric motor, characterized by that for the purpose of automatic start of the internal combustion engine, on the shaft of the unit - a generator - an electric motor-mounted flywheel, the flywheel moment of which is calculated n so that when the power supply of the electric motor and clutch is stopped by means of an automatically acting clutch 6 of the shafts of the specified unit and the internal combustion engine, the latter, under the action of the inertia forces of the unit, can be unwound to the speed required for its starting and, in addition, engine to another would ensure normal operation of the generator.

2. Form of the device according to f. 1, distinguished from teM, that two shunt electromagnets 13 and 19 fi disconnected to the mains supplying the electric motor are switched on to automatically move the coupling clutch 6 and to supply fuel to the internal combustion engine when the power supply to the electric motor stops

springs 11, 18, bark 8 and 17, of which measles 8, when current disappears in electromagnets under the action of a spring, is intended to release the adjustable clutch lever 6, and bark 17 to relocate the valve for fuel intake into the internal combustion engine.

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