CN205059980U - Trailing suction dredge main power plant - Google Patents

Abstract

A main power device of a trailing suction dredger, including a No. 1 main engine, a No. 2 main engine, and a dredging frequency conversion power station. The flywheel end of the No. 1 main engine is connected to the No. 1 shaft generator and the No. 1 adjustable pitch through the No. 1 main propulsion gearbox. The output end of the No. 1 main propulsion gearbox is equipped with a clutch; the flywheel end of the No. 2 main engine is respectively connected to the No. 2 shaft generator and the No. 2 adjustable pitch propeller through the No. Clutch; the above two shaft generators form a dredging variable frequency power station, and the power, voltage, current and frequency of each shaft generator are monitored by the power management system. Pump variable frequency motor, No. 2 mud pump variable frequency motor, No. 1 high pressure flushing pump variable frequency motor, No. 2 high pressure flushing pump variable frequency motor, No. 1 side push variable frequency motor, No. 2 side push variable frequency motor and other equipment power supply.

Description

Main power plant of trailing suction dredger

technical field

The utility model relates to an active power device of a trailing suction dredger.

Background technique

The ship's power plant is a key factor in determining the ship's layout and operating costs. For large trailing suction dredgers, more high-power equipment is used, and the trailing suction dredgers mainly use There is a big difference in energy consumption of equipment, so whether the power device is reasonable or not has a particularly obvious impact on the construction efficiency and economy of trailing suction dredgers.

The power plant of a modern large trailing suction dredger generally includes two sets of main propulsion propellers, two dredging generators, two in-cabin mud pumps, two high-pressure flushing pumps, etc. At present, the main power devices of large-scale trailing suction dredgers built in China adopt the "one-to-three" driving mode, that is, the flywheel end of each main engine drives the propeller and shaft generator through a transmission gearbox, and the main engine The free end of the pump directly drives the mud pump through a reduction gearbox. Although this type of power device has the advantages of simple structure and small initial investment, the speed of pumping/unpumping of the mud pump is high, which has a large impact on the load of the main engine, and even has an impact on the ship power grid. The adjustment of the mud pump can only be done by changing the speed of the main engine, and the adjustment range of the speed of the mud pump is relatively narrow.

Contents of the invention

The purpose of this utility model is to provide a kind of active power device of the trailing suction dredger to meet the needs of full load/light load sailing, dredging and loading, bow blowing/bow According to the power distribution requirements of major power equipment under three different working conditions, the layout of the engine room is scientific, reasonable and compact, and the fuel cost and maintenance cost are reduced.

The technical scheme of the utility model adopts the No. 1 main engine, the No. 2 main engine, and the dredging frequency conversion power station. The No. 1 main engine uses heavy oil as fuel, and its flywheel ends are respectively connected to the No. 1 shaft generator through the No. 1 main propulsion gearbox. and the No. 1 adjustable pitch propeller, the No. 1 main propulsion gearbox output end has a clutch; the No. 2 main engine uses heavy oil as fuel, and its flywheel end is respectively connected to the No. 2 shaft generator through the No. 2 main propulsion gearbox and No. 2 adjustable pitch propeller, No. 2 main propulsion gearbox output with clutch; the above two shaft generators form a dredging frequency conversion power station, and the power management system (PMS system) controls the power of each shaft generator, The voltage, current and frequency are monitored, and the characteristic is that through the main power distribution system, the No. 1 mud pump variable frequency motor, the No. 2 mud pump variable frequency motor, the No. Power supply for side thrust variable frequency motor, No. 2 side thrust variable frequency motor and other equipment.

The utility model is also equipped with an auxiliary diesel generator set, which is used as a backup of the main generator under sailing conditions, and can also be used to meet the needs of the desilter pumps and high-pressure generators of the entire ship when the power of the two sets of shaft generators is insufficient under operating conditions. The power consumption of other equipment other than flushing pumps and side thrusters, or the power consumption of the whole ship when berthing.

The utility model has the advantage that the dredging frequency conversion power station is used to supply power to major dredging equipment such as dredging pumps, high-pressure flushing pumps, side thrusters, and hydraulic systems through a centralized power management system. The power demand under different operating conditions of dredging and loading, bow blowing and spraying improves the adaptability of the trailing suction dredger to the project. At the same time, the main engine can run at a constant speed and stably under various operating conditions. Reduce the number of diesel units, improve the working environment and living environment of the crew, improve the economy of the ship, and effectively reduce the operating cost of the ship.

Description of drawings

Fig. 1 is a schematic diagram of the principle of the main power device of the trailing suction dredger of the present invention.

detailed description

The main power device of the trailing suction dredger of the present utility model includes a No. 1 main engine 101 and a No. 2 main engine 201. The No. 1 main engine uses heavy oil as the fuel, and its flywheel ends are respectively connected to a No. 1 main propulsion gearbox 102. No. 1 shaft with generator 104 and No. 1 adjustable pitch propeller 103, No. 1 main propulsion gearbox output end with clutch; No. 2 main engine uses heavy oil as fuel, and its flywheel end passes through No. 2 main propulsion gearbox 202 The No. 2 shaft generator 204 and the No. 2 adjustable pitch propeller 203 are respectively connected, and the output end of the No. 2 main propulsion gearbox has a clutch; the above two shaft generators form a dredging frequency conversion power station, which is controlled by a power management system (PMS system) The power, voltage, current, frequency, etc. of each shaft generator are monitored, and it is characterized in that through the No. 1 main power distribution system 110, the frequency conversion motor 107 of the No. No. 1 side push variable frequency motor 105 and other equipment supply power; No. 2 main power distribution system 210 supplies power to No. 2 mud pump variable frequency motor 207, No. 2 high pressure flushing pump variable frequency motor 206, No. 2 side push variable frequency motor 205 and other equipment.

The utility model is also equipped with an auxiliary diesel generator set, which is used as a backup of the main generator under sailing conditions, and can also be used to meet the needs of the whole ship's desilter pump, high-voltage Electricity requirements for flushing pumps, side thrusters and other equipment, or for the entire ship when berthing.

The No. 1 mud pump 109 in the utility model is driven by the No. 1 mud pump frequency conversion motor through the No. 1 mud pump reduction gear box 108 .

The No. 2 mud pump 209 in the utility model is driven by the No. 2 mud pump frequency conversion motor through the No. 2 mud pump reduction gear box 208 .

In the utility model, the No. 1 main propulsion gearbox and the No. 2 main propulsion gearbox are double-output gearboxes with clutches.

The working principle of the trailing suction dredger power plant of the present invention under different working conditions is as follows (taking several typical working conditions as examples):

a. No. 1 mud pump and No. 2 mud pump are in the dredging state at the same time, No. 1 main engine and No. 2 main engine work, No. 1 adjustable pitch propeller and No. 2 adjustable pitch propeller work, No. 1 shaft generator and No. The shaft generator works, respectively drives No. 1 mud pump frequency conversion motor to drive No. 1 mud pump to work through No. 1 mud pump reduction gear box, No. 2 mud pump frequency conversion motor to drive No. 2 mud pump to work through No. The No. 1 high-pressure flushing pump frequency conversion motor drives the No. 1 high-pressure flushing pump to work, the No. 2 high-pressure flushing pump frequency conversion motor drives the No. 2 high-pressure flushing pump to work, the No. 1 side thruster frequency conversion motor drives the No. No. 2 side thruster work;

b. When No.1 mud pump and No.2 mud pump are in series bow blowing/bow blowing state, No.1 main engine and No.2 main engine are working, No.1 adjustable pitch propeller and No.2 adjustable pitch propeller are working, and No.1 shaft generator Working with the No. 2 shaft generator, respectively drive No. 1 mud pump variable frequency motor, No. 2 mud pump variable frequency motor, No. 1 high pressure flushing pump variable frequency motor, No. 2 high pressure flushing pump variable frequency motor, No. Side thruster frequency conversion motor;

c. When one of the No. 1 mud pump or No. 2 mud pump is in the dredging state, No. 1 main engine and No. 2 main engine work, No. 1 adjustable pitch propeller and No. 2 adjustable pitch propeller work, No. 1 adjustable pitch propeller The shaft generator or No. 2 shaft generator works to drive No. 1 high-pressure flushing pump variable frequency motor or No. 2 high-voltage flushing pump variable-frequency motor, No. 1 mud pump variable-frequency motor or No. 2 mud pump variable-frequency motor, and No. 1 side thrust variable-frequency motor Or No. 2 side thruster variable frequency motor;

d. During light-load/heavy-load sailing, No. 1 main engine and No. 2 main engine are working, the main power of the main engine is used to drive the adjustable pitch propeller, and dredging equipment such as mud pump, high-pressure flushing pump, side thruster and hydraulic system are not working.

The power device of the trailing suction dredger of the utility model is based on the power distribution of the main equipment of the whole ship in different construction operation conditions, and adopts two main engines that can use heavy oil to drive the adjustable pitch propeller and the shaft generator respectively. Form, using the dredging frequency conversion power station and power management system, reduces the number of diesel engines, facilitates the layout of the engine room, and reduces fuel costs and maintenance costs.

Claims (2)

1. drag suction dredge main power plant, adopt a main frame, No. two main frames, dredging frequency conversion power station, a described choice of main machine heavy oil is the type of fuel, its flywheel end is promoted mainly by No. one and is connected a shaft generator and a controllable pitch propeller respectively into gear case, promotes mainly into gearbox output band power-transfer clutch for No. one; Described No. two choice of main machine heavy oil are the type of fuel, and its flywheel end is promoted mainly by No. two and connected No. two shaft generators and No. two controllable pitch propellers respectively into gear case, promotes mainly into gearbox output band power-transfer clutch for No. two; Above-mentioned two shaft generators form a dredging frequency conversion power station, by power management system and PMS system, the power of every platform shaft generator, voltage, electric current, frequency are monitored, it is characterized in that being powered respectively to a dredge pump adjustable frequency motor, No. two dredge pump adjustable frequency motors, high-pressure flush pump frequency conversion electrical motor, No. two high-pressure flush pump frequency conversion electrical motors, thruster adjustable frequency motor, No. two thruster adjustable frequency motors and miscellaneous equipments by main distribution system.

2. drag suction dredge main power plant as claimed in claim 1, is characterized in that a dredge pump adjustable frequency motor drives a dredge pump job through a dredge pump reducing gearbox, No. two dredge pump adjustable frequency motors drive No. two dredge pump work through No. two dredge pump reducing gearboxs, high-pressure flush pump frequency conversion electrical motor drives a high-pressure flush pump work, No. two high-pressure flush pump frequency conversion electrical motors drives No. two high-pressure flush pump works, a thruster adjustable frequency motor drives a thruster job and No. two thruster adjustable frequency motors to drive No. two thruster work.