WO2013179656A1 - 原動機システム及びこれを備えた船舶 - Google Patents
原動機システム及びこれを備えた船舶 Download PDFInfo
- Publication number
- WO2013179656A1 WO2013179656A1 PCT/JP2013/003377 JP2013003377W WO2013179656A1 WO 2013179656 A1 WO2013179656 A1 WO 2013179656A1 JP 2013003377 W JP2013003377 W JP 2013003377W WO 2013179656 A1 WO2013179656 A1 WO 2013179656A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- hydraulic oil
- prime mover
- electric motor
- pump
- pressure
- Prior art date
Links
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 109
- 239000000446 fuel Substances 0.000 claims abstract description 51
- 238000000605 extraction Methods 0.000 claims description 8
- 239000007789 gas Substances 0.000 description 24
- 238000010586 diagram Methods 0.000 description 9
- 230000002265 prevention Effects 0.000 description 7
- 239000012530 fluid Substances 0.000 description 5
- 230000002000 scavenging effect Effects 0.000 description 5
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J3/00—Driving of auxiliaries
- B63J3/02—Driving of auxiliaries from propulsion power plant
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/12—Use of propulsion power plant or units on vessels the vessels being motor-driven
- B63H21/14—Use of propulsion power plant or units on vessels the vessels being motor-driven relating to internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
- F01N5/04—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using kinetic energy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
- F02B61/04—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
- F02B67/10—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of charging or scavenging apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/12—Feeding by means of driven pumps fluid-driven, e.g. by compressed combustion-air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J3/00—Driving of auxiliaries
- B63J2003/001—Driving of auxiliaries characterised by type of power supply, or power transmission, e.g. by using electric power or steam
- B63J2003/007—Driving of auxiliaries characterised by type of power supply, or power transmission, e.g. by using electric power or steam by using a gas, other than steam, as power transmission medium, e.g. for pneumatic power transmission
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the present invention relates to a prime mover system that drives a fuel pump using exhaust gas.
- a prime mover mounted on a ship or the like is provided with a fuel pump. It is efficient if the fuel pump can be driven using exhaust gas discharged from the prime mover. Although it is difficult to drive the fuel pump directly with exhaust gas, a power turbine is connected to the pump for boosting hydraulic oil, the pump for boosting hydraulic fluid is driven with exhaust gas, and the fuel pump is pumped with hydraulic fluid boosted by the pump for boosting hydraulic fluid It is possible to operate.
- the hydraulic oil boosting pump (60) is driven by the rotational power of the crankshaft (50), and the hydraulic oil boosting is also performed by an auxiliary power unit (330) including a power turbine and an electric motor.
- a prime mover system (300) for driving a pump (60) is disclosed. And this power turbine is rotationally driven using the waste gas discharged
- the present invention has been made to solve the above-described problems, and is a prime mover system that drives a fuel pump using exhaust gas, and the fuel pump is stable even if the load on the prime mover fluctuates.
- An object is to provide a prime mover system capable of supplying fuel.
- a prime mover system includes a prime mover having a fuel pump driven by hydraulic oil, a hydraulic oil boost pump that boosts the hydraulic oil, and a parallel or series arrangement with the hydraulic oil boost pump.
- An auxiliary hydraulic oil boosting pump that boosts the hydraulic oil, a supercharger that supplies compressed air to the prime mover, an exhaust passage that supplies exhaust gas discharged from the prime mover to the supercharger, and the exhaust
- a branch passage that branches from the passage, a power turbine that is driven by exhaust gas supplied through the branch passage, and that drives the hydraulic oil boosting pump, and an auxiliary electric motor that drives the auxiliary hydraulic pressure boosting pump;
- the pressure of the hydraulic oil supplied to the fuel pump is acquired, and the output of the auxiliary electric motor is adjusted so that the acquired pressure of the hydraulic oil becomes a predetermined pressure set in advance. It comprises a Gosuru control device.
- the operation supplied to the fuel pump by controlling the output of the auxiliary electric motor can be set to a predetermined pressure. Therefore, even if the load on the prime mover fluctuates, the fuel pump can stably supply fuel.
- the predetermined pressure may be set according to the output of the prime mover. According to such a configuration, since the pressure of the hydraulic oil that drives the fuel pump can be optimized according to the output of the prime mover, it is possible to prevent the hydraulic oil pressure from becoming excessively large and suppress energy loss. it can.
- the branch passage has an extraction valve capable of extracting exhaust gas inside, and the control device acquires a rotation speed of the power turbine, and the acquired rotation speed of the power turbine is greater than a predetermined value.
- the opening of the bleed valve may be increased when the pressure increases. According to such a configuration, since the rotational speed of the power turbine can be suppressed to a certain level or less, it is possible to prevent damage to the hydraulic oil pressure boosting pump caused by excessive rotation of the power turbine and excessive pressure boosting of the hydraulic oil. it can.
- the motor system further includes an electric motor driven by electric power supplied from a generator and driving the hydraulic oil boosting pump in cooperation with the power turbine, and the power turbine and the electric motor are Always connected to the hydraulic oil boosting pump, and the control device acquires a load applied to the electric motor, and when the load applied to the electric motor becomes smaller than a predetermined value, the electric motor and the You may be comprised so that a generator may be electrically disconnected.
- the hydraulic oil boosting pump is driven not only by the power turbine but also by an electric motor, so that the hydraulic oil boosting pump can be driven stably.
- the pressure of the hydraulic oil is stabilized, and the fuel pump can stably supply the fuel.
- the entire system is simplified by always connecting the power turbine and the electric motor to the hydraulic oil boosting pump.
- the electric motor and the generator are electrically disconnected so that the electric motor is driven by the power turbine and the “generator” Does not work as well. Therefore, the resistance to the power turbine generated by the operation of the electric motor like a generator is reduced, and the problem caused by the current flowing to the generator side does not occur.
- the control device may be configured such that when the load on the prime mover is smaller than a predetermined value, the load on the auxiliary hydraulic pressure booster pump is larger than when the load on the prime mover is larger than the predetermined value.
- the output of the operating motor and the output of the auxiliary operating motor may be controlled so that the ratio of the load of the hydraulic oil pressure boosting pump to the motor becomes small.
- the fuel pump in a prime mover system that drives a fuel pump using exhaust gas, the fuel pump can stably supply fuel even if the load on the prime mover fluctuates.
- 1 is a schematic diagram of a prime mover system according to a first embodiment of the present invention.
- 1 is a block diagram of a control system of a prime mover system according to a first embodiment of the present invention. It is the schematic of the motor
- a prime mover system 100 is a so-called main engine for navigating a ship 101, and includes a prime mover 10, a supercharger 20, a hydraulic oil booster pump 30, and a power turbine. 50, an auxiliary hydraulic oil boosting pump 60, and an auxiliary electric motor 70.
- a prime mover 10 is a so-called main engine for navigating a ship 101, and includes a prime mover 10, a supercharger 20, a hydraulic oil booster pump 30, and a power turbine. 50, an auxiliary hydraulic oil boosting pump 60, and an auxiliary electric motor 70.
- the prime mover 10 is a central device of the prime mover system 100.
- the prime mover 10 according to the present embodiment is a so-called low speed diesel engine.
- the prime mover 10 rotates a propeller shaft 103 with a propeller 102 attached to the tip.
- the propeller shaft 103 is connected to the crankshaft 11, and the crankshaft 11 is connected to a plurality of pistons 12.
- Each piston 12 reciprocates as the fuel explodes in the cylinder 13, and the crankshaft 11 rotates by the reciprocating motion of the piston 12.
- the fuel is pressurized by the fuel pump 14 and supplied into the cylinder 13.
- the fuel pump 14 is a so-called piston pump, and is driven by hydraulic oil whose pressure has been increased by the hydraulic pressure boosting pump 30 and the auxiliary hydraulic pressure boosting pump 60. Further, scavenging gas is inserted into the cylinder 13 from the scavenging pipe 15, and the exhaust gas generated in the cylinder 13 is discharged to the exhaust pipe 16.
- the supercharger 20 is a device that compresses fresh air and supplies it to the prime mover 10.
- the exhaust gas discharged from the prime mover 10 is supplied to the turbine unit 22 through the exhaust pipe 21 through the exhaust pipe 16.
- the turbine unit 22 is rotated by the energy of the supplied exhaust gas.
- the turbine part 22 and the compressor part 23 are connected by a shaft part 24, and the compressor part 23 also rotates as the turbine part 22 rotates.
- the compressor unit 23 rotates, fresh air taken from the outside is compressed, and the compressed fresh air (scavenging) is supplied to the scavenging pipe 15 through the scavenging passage 17.
- the hydraulic oil boosting pump 30 is a pump that boosts the hydraulic oil.
- the hydraulic oil boosted by the hydraulic oil boosting pump 30 is used to drive the fuel pump 14 of the prime mover 10.
- the hydraulic oil boosted by the hydraulic oil boosting pump 30 may be used to drive devices other than the fuel pump 14 such as an exhaust valve (not shown).
- the hydraulic oil boosted by the hydraulic oil boosting pump 30 is used only for driving the fuel pump 14, the burden on the hydraulic oil boosting pump 30 is reduced, and consequently the burden on the auxiliary electric motor 70 described later is reduced. As a result, the amount of carbon dioxide discharged from the generator 104 can be suppressed.
- the hydraulic oil boosting pump 30 of the present embodiment is a piston pump.
- the internal piston to be driven can adjust the discharge amount of hydraulic oil by changing the stroke.
- the power turbine 50 is a device that drives the hydraulic oil boosting pump 30.
- the exhaust gas discharged from the prime mover 10 is once stored in the exhaust pipe 16 and then supplied to the power turbine 50 through the exhaust passage 21 and the branch passage 51 branched from the exhaust passage 21.
- the power turbine 50 is rotationally driven by the energy of the supplied exhaust gas.
- the power turbine 50 has a variable turbine nozzle 52, and the inflow speed of the exhaust gas flowing into the power turbine 50 can be adjusted by changing the angle of the variable turbine nozzle 52.
- the prime mover system 100 includes a bypass passage 55 that bypasses the power turbine 50, and a bypass valve 54 is attached to the bypass passage 55.
- the power turbine 50 is always connected to the hydraulic oil pressure boosting pump 30 via the speed reducer 53.
- the auxiliary hydraulic oil boosting pump 60 is a pump that boosts the hydraulic oil together with the hydraulic oil boosting pump 30. That is, the auxiliary hydraulic pressure boosting pump 60 is a pump that assists the hydraulic pressure boosting pump 30. In the present embodiment, the auxiliary hydraulic pressure boosting pump 60 is arranged in parallel with the hydraulic pressure boosting pump 30. However, the auxiliary hydraulic pressure boosting pump 60 may be arranged in series with the hydraulic pressure boosting pump 30. The auxiliary hydraulic pressure boosting pump 60 has the same structure as the hydraulic pressure boosting pump 30.
- the auxiliary electric motor 70 is a device that drives the auxiliary hydraulic oil boosting pump 60. Electric power generated by a generator (diesel generator or the like) 104 provided in the ship is supplied to the auxiliary electric motor 70 via the switchboard 105, and the auxiliary electric motor 70 is rotationally driven by this electric power.
- the generator 104 that supplies electric power to the auxiliary electric motor 70 may be configured to generate power using the energy of the exhaust gas of the prime mover 10, and is configured to generate power by extracting power from the supercharger 20. It may be.
- the auxiliary electric motor 70 is always connected to the auxiliary hydraulic oil boosting pump 60.
- the prime mover system 100 includes a control device 80 that controls the prime mover system 100 as a whole.
- the control device 80 is configured by, for example, a CPU, a ROM, a RAM, and the like.
- FIG. 2 is a block diagram of a control system of the prime mover system 100.
- the control device 80 includes a hydraulic pressure sensor 18 that measures the pressure of hydraulic fluid supplied to the fuel pump 14, a prime mover speed sensor 19 that measures the rotational speed of the prime mover 10, and a fuel that measures the fuel injection amount.
- the flow rate sensor 106 and the power turbine speed sensor 25 that measures the rotational speed of the power turbine 50 are electrically connected. Based on the input signals from these devices, the control device 80 provides various information such as the pressure of the hydraulic oil supplied to the fuel pump 14, the rotational speed of the prime mover 10, the fuel injection amount, and the rotational speed of the power turbine 50. To get.
- control device 80 performs various calculations based on the input signals from the above-described devices, and controls each part of the prime mover system 100.
- control device 80 is electrically connected to the auxiliary electric motor 70 and the bypass valve 54, and transmits a control signal to these devices based on the results of calculations performed based on each input signal. To do.
- the control device 80 has an auxiliary electric motor control unit 81 and an overspeed prevention control unit 82 as functional configurations.
- the auxiliary electric motor control unit 81 is a part that controls the auxiliary electric motor 70. Specifically, the auxiliary electric motor control unit 81 first calculates the current load of the prime mover 10 using a map stored in advance based on the rotational speed of the prime mover 10 and the fuel injection amount. Subsequently, the auxiliary electric motor control unit 81 stores the optimum hydraulic pressure corresponding to the load of the prime mover 10 and determines the optimum hydraulic pressure corresponding to the calculated output of the prime mover 10. Further, the auxiliary electric motor control unit 81 transmits a control signal to the auxiliary electric motor 70 so that the pressure of the hydraulic oil supplied to the fuel pump 14 becomes the previously determined optimum hydraulic pressure, and the auxiliary electric motor 70 is controlled.
- auxiliary electric motor control unit 81 performs the control as described above, even if the output of the hydraulic oil boosting pump 30 fluctuates because the output of the power turbine 50 fluctuates with the fluctuation of the load of the prime mover 10.
- the auxiliary electric motor 70 By controlling the auxiliary electric motor 70, the pressure of the hydraulic oil supplied to the fuel pump 14 becomes appropriate, and the fuel pump 14 can stably supply the fuel.
- the over-rotation prevention control unit 82 is a portion that prevents over-rotation of the power turbine 50. Specifically, the overspeed prevention control unit 82 first determines whether or not the rotational speed of the power turbine 50 is greater than a predetermined value. Subsequently, when the overspeed prevention control unit 82 determines that the rotational speed of the power turbine 50 is greater than a predetermined value, the overspeed prevention control unit 82 transmits a control signal to the bypass valve 54 and opens the bypass valve 54. By opening the bypass valve 54, the amount of exhaust gas flowing into the power turbine 50 is reduced, and the rotational speed of the power turbine 50 can be reduced.
- the overspeed prevention control unit 82 performs the above-described control, thereby preventing the overspeed of the power turbine 50.
- the hydraulic oil is boosted by both the hydraulic oil pressure booster pump 30 and the auxiliary hydraulic oil pressure booster pump 60, and therefore the fluctuation of the load on the prime mover 10. Therefore, even if the output of the power turbine 50 fluctuates, the hydraulic oil boosting pump 30 can be driven stably. Also, by using a plurality of pumps, even if one of the pumps is damaged, the hydraulic oil can be boosted by the other pump. That is, the prime mover system 100 according to the present embodiment has redundancy as the entire system.
- the hydraulic oil boosting pump 30 and the power turbine 50 are directly connected without using a disconnect mechanism (clutch), and the auxiliary hydraulic oil boost pump 60 and the auxiliary electric motor 70 are disconnected. It is connected directly without going through. Therefore, the connecting mechanism for connecting the devices has a simple configuration, the risk of failure can be suppressed, and power can be transmitted efficiently (mechanical loss can be suppressed).
- FIG. 3 is a schematic diagram of a prime mover system 200 according to the present embodiment.
- the prime mover system 200 according to the present embodiment is not provided with a bypass valve 54 (see FIG. 1) that bypasses the exhaust gas flowing into the power turbine 50, and instead is provided in the branch passage 51.
- the configuration differs from the prime mover system 100 according to the first embodiment in that an extraction valve 56 is provided.
- FIG. 4 is a block diagram of a control system of the prime mover system 200 according to the present embodiment.
- the control device 80 is electrically connected to the extraction valve 56 instead of the bypass valve 54 (see FIG. 2), and performs an operation performed based on each input signal.
- a control signal is transmitted to the extraction valve 56 based on the result of the above.
- the over-rotation prevention control unit 82 of the control device 80 determines that the rotational speed of the power turbine 50 is greater than a predetermined value
- the control signal is transmitted to the extraction valve 56 and the extraction valve 56 is turned on. Open and reduce the amount of exhaust gas flowing to the power turbine 50. Thereby, the rotational speed of the power turbine 50 falls.
- the rotation speed of the power turbine 50 is controlled not to exceed a certain level by adjusting the opening degree of the extraction valve 56. Thereby, the excessive rotation of the power turbine 50 can be prevented.
- FIG. 5 is a schematic diagram of the prime mover system 300 according to the present embodiment.
- the prime mover system 300 according to the present embodiment is different in configuration from the prime mover system 100 according to the first embodiment in that it includes an electric motor 40 that drives a hydraulic oil boosting pump 30.
- the electric motor 40 is a device that drives the hydraulic oil boosting pump 30 in cooperation with the power turbine 50. Electric power generated by the generator 104 is supplied to the electric motor 40 via the switchboard 105, and the electric motor 40 is rotationally driven by this electric power. The electric motor 40 is always connected to the hydraulic oil boosting pump 30.
- FIG. 6 is a block diagram of the control system of the prime mover system 300 according to the present embodiment.
- the control apparatus 80 of this embodiment is electrically connected with the electric motor 40 and the switchboard 105 other than the apparatus demonstrated in 1st Embodiment.
- the control device 80 acquires the current value of the power source supplied to the electric motor 40 by the input signal from the electric motor 40.
- the control apparatus 80 transmits a control signal to the electric motor 40 and the switchboard 105 based on the result of the calculation etc. which were performed based on each input signal.
- the control apparatus 80 of this embodiment has the electric motor control part 83 which controls the electric motor 40 as a functional structure.
- both the hydraulic oil boosting pump 30 and the auxiliary hydraulic oil boosting pump 60 are always driven.
- the hydraulic oil boosting pump 30 is operated at 75% of the maximum output
- the auxiliary hydraulic oil boosting pump 60 is operated at 20% of the maximum output.
- the hydraulic oil can be sufficiently boosted with only one pump, but when both pumps are driven at all times, the operating situation of the prime mover 10 changes and the flow rate of the hydraulic oil needs to be increased. Can also respond quickly.
- the hydraulic oil boosting pump 30 is mainly driven by the electric motor 40.
- the electric motor 40 drives not only the hydraulic oil boosting pump 30, but also the power turbine 50, resulting in energy loss. Therefore, in the present embodiment, in order to minimize this energy loss, the load sharing between the hydraulic oil boosting pump 30 and the auxiliary hydraulic oil boosting pump 60 is changed.
- the electric motor control unit 83 determines whether or not the load of the prime mover 10 is smaller than a predetermined value. That is, it is determined whether or not the hydraulic oil booster pump 30 is mainly driven by the electric motor 40, not the power turbine 50.
- the electric motor control unit 83 transmits a control signal to the electric motor 40 and sets the rotation speed of the electric motor 40 to be small.
- the rotation speed set here is a rotation speed smaller than the rotation speed in normal operation. As a result, the output of the hydraulic oil pressure increasing pump 30 is reduced.
- the auxiliary electric motor control unit 81 controls the auxiliary electric motor 70 to maintain the pressure of the hydraulic oil supplied to the fuel pump 14 at a predetermined pressure.
- the ratio of the load of the hydraulic oil boosting pump 30 to the load of the auxiliary hydraulic oil boosting pump 60 becomes smaller than the ratio in the normal operation, and the energy loss in the electric motor 40 can be suppressed. That is, the auxiliary hydraulic pressure boosting pump 60 becomes the main pump that boosts the hydraulic pressure.
- whether or not to switch the main pump is determined based on whether or not the load on the prime mover 10 is smaller than a predetermined value. For example, whether or not the current supplied to the electric motor 40 is reversed. Whether or not to switch the main pump may be determined.
- the control device 80 may adjust the area of the variable turbine nozzle 52 so that the power turbine 50 does not become a resistance.
- the electric motor control unit 83 determines that the load of the prime mover 10 is not smaller than the predetermined value described above, the electric motor control unit 83 transmits a control signal to the electric motor 40 and sets the electric motor 40 to the rotational speed during normal operation. To do.
- the ratio of the load of the hydraulic pressure boosting pump 30 to the load of the auxiliary hydraulic pressure boosting pump 60 is larger than when the load of the prime mover 10 is small. As a result, both the auxiliary hydraulic pressure boosting pump 60 and the hydraulic pressure boosting pump 30 can be operated efficiently.
- the hydraulic oil boosting pump 30 can be driven only by the power turbine 50.
- the electric motor 40 is hardly loaded, so the electrical connection between the electric motor 40 and the generator 104 is disconnected.
- the electric motor control unit 83 first determines whether or not the current value of the power supplied to the electric motor 40 is smaller than a predetermined value. In this embodiment, since the electric motor 40 is driven at a constant speed, the current value of the power supplied to the electric motor 40 decreases when the load of the electric motor 40 decreases. That is, by detecting the current value of the power supplied to the electric motor 40, the degree of load on the electric motor 40 can be determined.
- the electric motor control unit 83 determines that the current value of the power supplied to the electric motor 40 is smaller than the predetermined value, the electric motor control unit 83 transmits a control signal to the switchboard 105 to electrically connect the electric motor 40 and the generator 104 to each other.
- the switchboard 105 is controlled so as to be disconnected.
- the electric motor 40 and the generator 104 are electrically disconnected, of course, because it is not necessary to supply electric power to the electric motor 40, but there are other reasons. That is, when the load on the prime mover 10 is large, the electric motor 40 is driven by the power turbine 50. At this time, current may flow from the electric motor 40 to the generator 104 and the auxiliary electric motor 70, which may cause problems, but this is prevented. Even when power is not supplied from the generator 104 to the electric motor 40, power is supplied to the auxiliary electric motor 70. Therefore, even if the hydraulic pressure boosting pump 30 becomes somewhat unstable, it can be covered by the auxiliary hydraulic pressure boosting pump 60.
- the prime mover system 300 not only the power turbine 50 but also the electric oil booster pump 30 is driven using the electric motor 40, so that the power turbine 50 is changed due to the load variation of the prime mover 10. Even when the output of the hydraulic fluid fluctuates, the hydraulic oil boosting pump 30 can be driven stably. Further, the hydraulic oil boosting pump 30 and the power turbine 50 are directly connected without going through the disconnecting mechanism, and the hydraulic oil boosting pump 30 and the electric motor 40 are directly connected without going through the disconnecting mechanism. Therefore, switching when the drive source of the hydraulic oil boosting pump 30 is switched from the electric motor 40 to the power turbine 50 and vice versa can be performed quickly.
- the prime mover system according to the present invention is a prime mover system that drives a fuel pump using exhaust gas, but the fuel pump can stably supply fuel even when the load on the prime mover fluctuates. Useful in the technical field of systems.
- prime mover 14 fuel pump 20 supercharger 21 exhaust passage 30 hydraulic oil boosting pump 40 electric motor 50 power turbine 51 branch passage 56 bleed valve 60 auxiliary hydraulic oil boosting pump 70 auxiliary electric motor 80 controller 100, 200, 300 prime mover System 101 Ship 104 Generator
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Abstract
Description
<原動機システムの全体構成>
まず、図1を参照しながら、本発明の第1実施形態に係る原動機システム100の全体構成について説明する。図1に示すように、本実施形態に係る原動機システム100は、船舶101を航行させるためのいわゆる主機であって、原動機10と、過給機20と、作動油昇圧用ポンプ30と、パワータービン50と、補助作動油昇圧用ポンプ60と、補助電動モータ70と、を備えている。以下、これらの各構成要素について順に説明する。
次に、原動機システム100のうち制御系の構成について説明する。原動機システム100は、原動機システム100全体を制御する制御装置80を備えている。制御装置80は、例えばCPU、ROM、RAM等によって構成されている。図2は、原動機システム100の制御系のブロック図である。
次に、図3及び図4を参照しながら、本発明の第2実施形態に係る原動機システム200について説明する。図3は本実施形態に係る原動機システム200の概略図である。図3に示すように、本実施形態に係る原動機システム200は、パワータービン50に流入する排ガスを迂回させるバイパスバルブ54(図1参照)が設けられておらず、これに代えて分岐通路51に抽気バルブ56が設けられている点で第1実施形態に係る原動機システム100と構成が異なる。
次に、図5及び図6を参照しながら、本発明の第3実施形態に係る原動機システム300について説明する。図5は、本実施形態に係る原動機システム300の概略図である。図5に示すように、本実施形態に係る原動機システム300は、作動油昇圧用ポンプ30を駆動する電動モータ40を有する点で第1実施形態に係る原動機システム100と構成が異なる。
14 燃料ポンプ
20 過給機
21 排気通路
30 作動油昇圧用ポンプ
40 電動モータ
50 パワータービン
51 分岐通路
56 抽気バルブ
60 補助作動油昇圧用ポンプ
70 補助電動モータ
80 制御装置
100、200、300 原動機システム
101 船舶
104 発電機
Claims (6)
- 作動油によって駆動される燃料ポンプを有する原動機と、
前記作動油を昇圧する作動油昇圧用ポンプと、
前記作動油昇圧用ポンプと並列又は直列に配置され、前記作動油を昇圧する補助作動油昇圧用ポンプと、
前記原動機に圧縮空気を供給する過給機と、
前記原動機から排出された排ガスを前記過給機に供給する排気通路と、
前記排気通路から分岐する分岐通路と、
前記分岐通路を通って供給される排ガスによって駆動され、前記作動油昇圧用ポンプを駆動するパワータービンと、
前記補助作動油昇圧用ポンプを駆動する補助電動モータと、
前記燃料ポンプに供給される作動油の圧力を取得し、取得した前記作動油の圧力が予め設定された所定圧力となるように前記補助電動モータの出力を制御する制御装置と、を備えた原動機システム。 - 前記所定圧力は前記原動機の出力に応じて設定されている、請求項1に記載の原動機システム。
- 前記分岐通路は内部の排ガスを抽出できる抽気バルブを有し、
前記制御装置は前記パワータービンの回転速度を取得し、取得した前記パワータービンの回転速度が所定値よりも大きくなったとき抽気バルブの開度を大きくする、請求項1又は2に記載の原動機システム。 - 発電機から配電盤を介して供給された電力により駆動され、前記パワータービンと協働して前記作動油昇圧用ポンプを駆動する電動モータをさらに備え、
前記パワータービンは前記作動油昇圧用ポンプに常時連結されており、
前記電動モータは前記作動油昇圧用ポンプに常時連結されており、
前記制御装置は、前記電動モータにかかる負荷を取得し、前記電動モータにかかる負荷が所定値よりも小さくなったとき、前記電動モータと前記発電機とを電気的に切断する、請求項1乃至3のうちいずれか一の項記載の原動機システム。 - 前記制御装置は、前記原動機の負荷が所定値よりも小さいとき、前記原動機の負荷が当該所定値よりも大きいときに比べて、前記補助作動油昇圧用ポンプの負荷に対する前記作動油昇圧用ポンプの負荷の割合が小さくなるように、前記作動モータの出力及び前記補助作動モータの出力を制御する、請求項4に記載の原動機システム。
- 請求項1乃至5のうちいずれか一の項に記載の原動機システムを備えた船舶。
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JP2014518283A JP5802332B2 (ja) | 2012-05-28 | 2013-05-28 | 原動機システム及びこれを備えた船舶 |
CN201380026078.4A CN104302544B (zh) | 2012-05-28 | 2013-05-28 | 原动机系统及具备该原动机系统的船舶 |
KR1020147036544A KR101650471B1 (ko) | 2012-05-28 | 2013-05-28 | 원동기 시스템 및 이를 구비한 선박 |
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JP6383925B1 (ja) * | 2017-06-21 | 2018-09-05 | 株式会社三井E&Sマシナリー | 内燃機関の過給機余剰動力回収装置及び船舶 |
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KR101650471B1 (ko) | 2016-08-23 |
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JPWO2013179656A1 (ja) | 2016-01-18 |
KR20150021962A (ko) | 2015-03-03 |
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