SU1699863A1 - Ferry power plant - Google Patents

Abstract

The invention relates to shipbuilding, in particular to electric power plants of ferries with shaft generators. The purpose of the invention is to increase the efficiency of the power installation. The latter contains two main motors 1, 2, which are separated kinematically through a decoupling clutch 3 and 4 with independent control of the gearbox 5. Che

Description

The invention relates to shipbuilding, in particular to electric power installations of ferries with shaft generators.

Known electric power plants of the ferries supplied with feed and nose screws of a fixed (or adjustable) pitch, containing propeller motors, tires for electrical consumers, main and auxiliary diesel (turbo) -generators. The drawbacks of such installations are: the presence of low-speed diesel generators, as well as engines and other consumers on direct current, which significantly impairs the mass parameters, low installation efficiency in nominal and partial modes, the use of expensive electrical energy produced by auxiliary diesel (turbo) - generators.

The electric power installation of the ferry is well-known, containing propeller motors, tires for electrical consumers, to which main and auxiliary diesel (turbo) generators are connected and providing the necessary running and maneuvering characteristics, which are higher in terms of equipment and economics.

However, in spite of a better electric power installation

The disadvantages of the known installation are: reduced efficiency in the main (running) mode of the ferry, as the driving motors of the aft screws have an efficiency 2-3% lower than the driving engines using direct energy transfer to the screws without intermediate conversions, reduced installation efficiency, caused by the free rotation of the propeller 5 due to the oncoming water flow, which creates additional resistance to the movement of the vessel, reduced installation reliability due to the lack of interchangeability of the main elements, effectiveness to the movement of the ferry and ship power electrical consumers.

The purpose of the invention is to increase the efficiency of the power installation.

The goal is achieved by the fact that in the electric power plant of the ferry mainly with fodder and propeller screws, containing propeller motors, tires for ship electric power, to which diesel (turbo) generators are connected, a multi-position switch is inserted, the propeller shaft is equipped with a sensor zero stop, as driving motors of the aft screw and power sources of ship consumers use

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Two heat engines with a reducer and two shaft generators with semiconductor frequency converters with control units are used, an AC electric motor with a semiconductor frequency converter with a control unit is used as a propeller drive, and the shaft generators are connected to the ship electric consumers, with inputs and outputs their frequency converters, which, in turn, are connected to the tires of the ship's electrical consumers and to the first a and second B inputs of the multi-position the switch, and the electric motor, the input and output of its frequency converter are connected respectively to the first 1, second and third G outputs of the multi-position switch, the third 6 input of which is connected to the tires of the ship's electrical consumers, the zero-stop sensor is connected to the control units of the converters; between the feed stub and gearbox installed disconnect coupling.

FIG. 1 is a schematic diagram of the electric power plant of the ferry; in fig. 2 is a diagram of a multi-position switch.

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The electric power plant of the ferry consists of two main engines 1 and 2, which are connected through disconnecting clutches 3 and k with independent control to gear 5, to which the feed screw 7 4d of fixed or adjustable pitch and shaft generators 8 and 9 are connected through disconnecting coupling 6 The outputs of which, through the circuit breakers (AB) 10-13 are connected to the inputs and outputs, equipped with AND blocks and 15 45 control semiconductor frequency converters 16 and 17 (PPI), the outputs of which are connected to the inputs (first and second) a) multi-position switch (MIP) 18 with three inputs and 5 outputs and three outputs and through automatic switches 19 and 20 with buses 21 for supplying the ship's electrical consumers, to which are also connected by automatic switches 22 and 23 valbgenerators 8 and 9, automatic switches .k and 25 diesel (turbo) generators 26 and 27 and direct input (third P) of the MPP 18, and

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Q 0 5

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d 5 Q

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Outlets of the MPP 18 (first 1, third e, second Pr, respectively) are connected to the input and output supplied with control unit 26 of the power supply unit 29 and with an AC propeller (HED) 30 coupled to the propeller nose 31, whose sensor is mounted on the shaft 32 zero stops, the output of which is connected to control blocks 14, 15 and 28.

Electric power installation of the ferry operates as follows.

In the travel mode from the aft propeller 7 (main mode), the shaft generators 8 and 9 and the aft propeller 7 are rotated by the main engines 1 and 2 through the gearbox 5 with the couplings 3,, 6 turned on.

1 and 2 above the lower operational shaft generators 8 and 9 are automatically put into operation to transfer energy to the ship's power consumers. At variable rotational frequencies of the main engines, power is transmitted to the ship's power consumers via PCF 16 and 17 and closed circuit breakers 10, 13 and 19 , 20 (included in parallel on tires 21 of the power supply of ship electric consumers).

The predetermined values of frequency and voltage at the output of the PCF 16 and 17 are set by the control blocks 14 and 15. After short-term parallel operation of shaft generators 8 and 9 with turbo (diesel) generators 26 and 27 and transferring the load to shaft generators, diesel (turbo) generators are disconnected from the power buses of the ship's electrical consumers, at a constant frequency of rotation of the main engines 1 and

2, the generators 8 and 9 can be connected without an FPCH 16 and 17 with the automatic circuit breakers 11, 12, 19 and 20 closed.

In the considered modes of operation of the electric power installation, the MPP 18 is in position I, in which the input is connected to output 2, and the output in - with output f and HED 30 receives power from the buses 21 of the power supply of the ship through the frequency converter. 29 is detected by the stop sensor 32, which acts on the zero stop control unit 28, thereby reducing the hydrodynamic co-movement rate of the ferry, and, consequently, the speed of the ferry increases in driving mode, i.e. The efficiency of using the electric power installation of the ferry in the main mode is improved.

In position II of the CAT 18, the shaft generator And operates on busses 21 supplying soup electric consumers without PCF 16 (AV 11 and 19 are closed), and the shaft generator 9 5e of the PCF 17 is connected to the input 5 of the MPP | 8 (closed AV 12 and AV 20 is open ED 30 It is powered by the Valaplaner Iropa 9 through the FPGA 29, while the input of the SPE 18 is connected to the output Z. and the output I & to the output A. In the position II of the WFP, the main engines 1 and 2 operate at a constant rotation frequency.

In position III of the MPP 18, the shaft-generator 8 operates on busses 21 supplying the ship's power consumers through PP

16 (AB 10 and 19 are closed), and the shaft generator 9 is connected via PCF 17 to the input 5 of the MPP 18 (AB 13 is closed, and

AB 20 and 23 are open). HED 30 receives power from the shaft generator 9 through the VFR 17, while the input 5 of the MPP 18 is connected to the output g. In position III of the MPP 18, the main engines 1 and 2 can operate with variable speed, the VFR 29 in this position of the MPP 18 is de-energized.

In position IV of the MPP 18, the shaft-generator 9 operates on the tires 21 of the power supply of ship electric consumers without VFR

17 (AB 12 and 20 are closed), and shaft generator 8 without PCF 16 is connected to the input A of CMP 18 (AB 11 is closed, and AB 19 is open). HED 30 receives power from the shaft generator 8 through the VFR 29, while the input of the MPP 18 is connected to output 1, and output b is connected to output Q. In position IV of the MPP 18, the main engines 1 and 2 operate at a constant rotational speed.

In position V of the MPP 18, the shaft generator 9 operates on the busses 21 for supplying electrical power consumers through the VFR 17 (closed AB 13 and 20), and the shaft generator 8 through the VFD 16 connects to the input A of the MPP 18 (closed AB 10 and the AB 19 and 22 are open) . HED 30 receives power from the shaft generator 9 through the VFR.16, while the input

q The MPP 18 is connected to the output Ј. In position V MPP 18 main engines

1 and 2 can work with variable

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rotational speed. PPHR 29 in this position WFP 18 is de-energized.

In position VI of MPP 18, the electric power installation of the ferry operates in extreme conditions (ensuring maximum travel, work in ice conditions) and emergency conditions. In this position, the MPP 18 diesel (turbo) —generators 26 and 27 are connected by automatic switches 2k and 25 to the power supply lines 21 of the ship's electrical consumers.

In extreme modes, the halogens 8 and 9 operate in the mode of valve engines together with the main engines 1 and 2 (AB 22 and 11 are closed, AB 19 and 10 are open, AB 23 and 12 are closed, AB 20 and 13 are open) HED 30 receives power from the tires 21 of the power supply of the ship electric consumers, while input 6 of the MPP 18 is connected to output 1, and output b is connected to output a,

In emergency mode (when the fodder propeller 7 comes out of service), the fodder propeller 7 is disconnected by the decoupling coupling 6, the main engines 1 and 2 rotate the shaft generators 8 and 9, which work in parallel with the diesel engine (turbo) generators 26 and 27 to tires 21 for power supply of ship electric consumers, from which they receive power from HED 30 through the VFD 29. Thus, to ensure the progress of the ferry in emergency mode, all the power of both halogeners and diesel (turbo) is used -generators.

Thus, in the proposed electric power plant of the ferry, the installation efficiency is increased (by 2-3%) due to the use of two main engines and two shaft generators with a frequency converter for transmitting power to the stern propeller and ship electric consumers, reducing power losses to overcome the moment nose propeller resistance due to the possibility of HED operation with the zero stop sensor in the non-hydrodynamic resistance mode, as well as providing a shaft generator with a frequency converter with stable parameters and on consumer tires at variable speeds of main engines.

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In addition to increasing the electric power efficiency of the installation, it is also possible to increase its reliability, since the introduction of the MPP makes it possible to provide additional power from the tires of the ship's electrical consumers to which the diesel (turbo) generators are connected, to transfer to the stern propeller by transferring the shaft generators in the mode of valve engines, from any shaft generator or two simultaneously powering the ship electric consumers and the NED propeller propeller, interchange the frequency converter at the exit of one and s work and, finally, to ensure the movement of the ferry nose propeller when leaving the stern propeller, transferring all the available power of the sources of electrical energy on the HED bow row

screw.

formula of invention 25

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Electric power installation. the ferry mainly with fodder and propeller propellers, containing propulsion propeller engines and diesel (turbo) - generators connected to the tires of the ship's electrical consumers, in order to increase the efficiency

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aesthetes converters and two control units for shaft generators, a semiconductor frequency converter and its control unit for a propeller motor, four automatic switches for shaft generators, four automatic switches for ship electric consumers, two automatic switches for diesel (turbo) -generators, with the main engines being kinematically connected to the gearbox via their self-controlled disconnecting couplings, which by means of an isolating coupling is connected to the stern propeller, and also connected to two shaft generators, which are electrically connected via circuit breakers to the first and second inputs of the multi-position switch and the ship electric consumers directly, through their semiconductor frequency converters connected to their control units , the multi-position switch with its third input is connected to the ship’s electric power buses, 0 tropic consumers, and he first and third outputs are connected to its semiconductor propeller frequency converter motor connected to its control unit, the second

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electric power plant, the output is connected to the propeller motor which is kinematically connected to the propeller nose, on the shaft of which a zero stop sensor is mounted, which is electrically connected

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The water engine of the propeller is designed as an electric motor, and the installation is equipped with two shaft generators, a gearbox, a stern propeller coupling and a coupling of the propulsion propeller drive motors, a multi-position switch with three inputs and three outputs, a sensor of a zero nasal stop of the 45 octal heat are connected to ship electric tires, two semiconductor consumers.

with control units of semiconductor frequency converters of shaft generators and a propeller motor, and diesel (turbo) generators through their automatic off;

Tepi are connected to the tires of ship electric consumers.

with control units of semiconductor frequency converters of shaft generators and a propeller motor, and diesel (turbo) generators through their automatic off;

Claims (1)

claims 25 Electric power plant .. a ferry mainly with aft and bow propellers, containing propeller propeller engines and ₃₀ diesel (turbo) generators connected to the ship's electrical consumers, characterized in that, in order to increase the efficiency of the electric power plant, the bow propeller drive motor made in the form of an electric motor, and the installation is equipped with two shaft generators, a gearbox, a disconnect clutch of the aft propeller and disconnect clutches of a drive a propeller propeller drive, a multi-position switch with three inputs and three outputs, a nose propeller zero stop sensor 45, two semiconductor frequency converters and two control units for shaft generators, a semiconductor frequency converter and its control unit for the propeller of the bow propeller, four circuit breakers for shaft generators, four circuit breakers for ship electrical consumers tires, two circuit breakers by them switches for diesel (turbo) generators, and the main engines are kinematically connected to the gearbox through their disconnect clutches with autonomous control, which is connected to the stern propeller by means of a disconnect clutch, and also connected to two shaft generators, which are electrically connected respectively with the first and second inputs of the multi-position switch and tires of marine electrical consumers directly, while through their semiconductors second frequency converters connected to their control units, a multi-position switch with its third input is connected to the tires of marine electrical consumers, and its first and third outputs are connected to a semiconductor frequency converter of the propeller motor connected to its control unit, the second output being connected to the propeller motor, which kinematically connected to the bow propeller, on the shaft of which a zero stop sensor is installed, which is electrically connected to the control units semiconductor frequency converters of shaft generators and. propeller motor, and diesel (turbo) generators through their circuit breakers are connected to the tires of marine electrical consumers.