CN116146333A - Control method for sequential pressurizing system of trawler - Google Patents
Control method for sequential pressurizing system of trawler Download PDFInfo
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- CN116146333A CN116146333A CN202211642207.XA CN202211642207A CN116146333A CN 116146333 A CN116146333 A CN 116146333A CN 202211642207 A CN202211642207 A CN 202211642207A CN 116146333 A CN116146333 A CN 116146333A
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- Prior art keywords
- controlled
- basic
- booster
- engine
- turbine
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Classifications
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- 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
- F02B37/007—Engines characterised by provision of pumps driven at least for part of the time by exhaust with exhaust-driven pumps arranged in parallel, e.g. at least one pump supplying alternatively
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/14—Fishing vessels
- B63B35/16—Trawlers
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- 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
- F02B37/12—Control of the pumps
- F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
- F02B37/183—Arrangements of bypass valves or actuators therefor
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- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Ocean & Marine Engineering (AREA)
- Supercharger (AREA)
Abstract
The invention discloses a control method for a sequential pressurizing system of a trawler, which relates to an engine of the trawler, wherein the trawler only opens a basic pressurizer when in a free sailing state and positioned at the left side of a boundary rotating speed N0, and opens a controlled pressurizer once exceeding the boundary rotating speed N0. When the trawler is in a trawl operation state, the trawler sails at a constant low rotation speed, the load is increased, and when the rotation speed of the trawler engine is left to the boundary rotation speed N0, the controlled booster is closed, so that the basic booster is left to normally operate. The control method provided by the invention controls the controlled booster by controlling the engine and matches the expected power required by the trawl fishing boat and the engine in the trawl operation state and the free sailing state with the power output by the engine by combining the control of the gas valve and the air valve.
Description
Technical Field
The invention belongs to the field of engines of trawlers, and particularly relates to a control method for a sequential supercharging system of a trawler.
Background
According to statistics, the free sailing state and the trawl operation state occupy about 90% of the running time of the trawl boat, and the trawl boat in the prior art adopts a conventional pressurizing system (shown in fig. 1), so that the problem that the expected power required by the trawl boat in the free sailing state and the trawl operation state can not be matched with the output power of the engine (shown in fig. 3) can not be met because the running characteristics of the engine are fixed in the free sailing state and the trawl operation state (shown in fig. 2).
Disclosure of Invention
In order to solve the technical problems, the invention provides a control method for a sequential supercharging system of a fishing boat, wherein a basic supercharger and a controlled supercharger are controlled by controlling an engine, and the operation rotating speeds of the basic turbine and the controlled turbine are linked, so that the expected power required by the fishing boat and the engine in a free sailing state is matched with the power output by the engine.
In order to achieve the technical effect of solving the technical problems, the invention is realized by the following technical scheme:
a control method for a sequential pressurization system of a fishing boat, the control method being based on a sequential pressurization system;
the supercharging system comprises a basic supercharger, a controlled supercharger, an engine and a propeller connected with the engine through a transmission shaft; the basic booster comprises a basic turbine and a basic compressor, and the controlled booster comprises a controlled turbine and a controlled compressor;
the basic turbine and the controlled turbine are communicated through an exhaust pipeline at one side of the engine, and a gas valve is arranged on a branch exhaust pipeline of the controlled turbine; the basic air compressor and the controlled air compressor pass through a transmitter air inlet pipeline at the other side of the engine, and an air valve is arranged on a branch exhaust pipeline of the controlled air compressor;
the control method comprises the following specific steps:
1. in the free sailing state, the control booster is in a low-rotation-speed low-load area, the basic booster is opened, and the controlled booster is closed; in a high-speed high-load area, opening a controlled supercharger, and maintaining the basic supercharger to operate;
2. under the trawl operation state, the device is always in a low-rotation-speed high-load area, the controlled supercharger is closed, and the normal operation of the basic supercharger is kept;
further, before the basic booster in the step 1 is opened, it is required to detect that the running speed is less than the boundary speed N0; before the controlled supercharger is opened, the first running speed is required to be detected to be greater than the boundary speed N0;
further, before the controlled booster is opened, a gas valve in communication with the controlled turbine is opened; the rotational speeds of the basic turbine and the controlled turbine which are connected in parallel through the exhaust pipeline are reversely changed and tend to be balanced; then, opening an air valve, starting a controlled compressor, starting a controlled supercharger, and balancing the rotation speeds of the basic turbine and the controlled turbine;
further, before the controlled supercharger is closed in the step 2, the engine to be detected reaches a critical load value, and the gas valve and the air valve are closed to stop the controlled supercharger.
The beneficial effects of the invention are as follows:
1. according to the control method provided by the invention, the basic booster and the controlled booster are controlled by controlling the engine, and the running rotating speeds of the basic turbine and the controlled turbine are linked, so that the expected power required by the trawler and the engine in a free sailing state is matched with the power output by the engine.
2. The control method provided by the invention controls the controlled booster by controlling the engine and matches the expected power required by the trawl fishing boat and the engine in the trawl operation state with the power output by the engine by combining the control of the gas valve and the air valve.
Drawings
FIG. 1 is a block diagram of a conventional supercharging system;
FIG. 2 is a graph of a conventional boost system engine operating characteristic;
FIG. 3 is a graph of conventional boost system expected power versus engine output power;
FIG. 4 is a graph of engine operating characteristics of a sequential supercharging system;
FIG. 5 is a graph of high and low load engine operation characteristics of a sequential supercharging system;
FIG. 6 is a block diagram of a sequential supercharging system;
fig. 7 is a block diagram a of a sequential supercharging system.
The serial numbers in the figure are: 101-engine, 102-basic compressor, 103-basic turbine, 104-controlled turbine, 105-controlled compressor, 106-gas communication pipe, 107-basic booster, 108-controlled booster, 109-air cooler, 1010-high elasticity coupling, 1011-engine intake line 1, 1012-engine exhaust line 2, 1013-exhaust communication pipe, 1014-intake communication pipe, 1015-gas valve, 1016-air valve, 1017-transmission shaft, 1018-clutch, 1019-propeller, 201-engine operating characteristics under conventional booster, 202-ideal engine power region 1, 203-match region 1, 204-expected power required for free sailing state, 205-free sailing state typical operating region, 206-free sailing state operating characteristics (propeller propulsion operating characteristics), 207-trawl operation region, 208-trawl operation state (propeller propulsion operating characteristics), 209-match region 2, 2010-ideal engine power region 2, 2011-expected power required for trawl operation state.
Detailed Description
Example 1
The invention provides a control method for a sequential pressurizing system of a trawler, which comprises the following specific free sailing state control steps:
1. when the propeller 1019 operating characteristics of the trawler in the free sailing state reach the first operating speed as shown in fig. 4, and the first operating speed of the boat is detected to be less than the boundary speed N0, the engine 101 is controlled to turn on the basic booster 107 only, and the control signal to the controlled booster 108 is turned off.
2. When the speed continues to increase and the second operating speed is reached, which is detected to be greater than the boundary speed N0, the engine 101 is controlled to turn on the controlled supercharger 108. The gas valve 1015 at the outlet of the base turbine 103 in the controlled supercharger 108 is opened first, and in this process, since the high-temperature and high-pressure exhaust gas discharged from the engine 101 is originally only supplied to the base turbine 103 to perform work, after the gas valve 1015 is opened, the base turbine 103 and the controlled turbine 104 are in a parallel state, and this high-temperature and high-pressure exhaust gas is transferred to the base turbine 103 and the controlled turbine 104 through the base exhaust pipe and the controlled exhaust pipe.
Since the energy of the high-temperature and high-pressure exhaust gas is shared by 2 turbochargers, the rotation speed of the basic turbine 103 is reduced, the rotation speed of the controlled turbine 104 is increased, the controlled turbine 108 is not in use at this time, the controlled turbine 104 is only in an idle state, the controlled compressor 105 is not driven to rotate compressed air, the boost pressure is reduced, the excess air coefficient is reduced, the high-temperature and high-pressure exhaust gas received by the basic turbine 103 is lower than that when the gas valve 1015 is not opened, and the rotation speed of the basic turbine 103 is reduced.
To avoid surging the controlled compressor 105 in the transient state of the gas valve 1015 being open, causing oscillations in the gas flow and thereby damaging the controlled compressor 105, the air valve 1016 of the controlled compressor 105 should be opened after a prolonged period of time.
3. After opening the air valve 1016 of the controlled compressor 105, the controlled compressor 105 starts to operate, and the controlled turbine 104 performs work to drive the controlled compressor 105 to rotate, so that the air pressure in the engine 101 is increased, and the air in the engine 101 is more sufficient than the fuel contact area before the air valve 1016 is not opened, and more high-temperature and high-pressure exhaust gas is provided to the basic turbine 103 and the controlled turbine 104 than when the air valve 1016 is not opened.
After a period of time, the operating speeds of the basic turbine 103 and the controlled turbine 104 are gradually equal, and then the speeds are gradually increased, the air pressure entering the engine 101 is also increased, the excess air ratio is increased, the output power of the engine 101 is increased, and the typical operating area in the free sailing state is reached, at this time, the expected power required by the trawler in the free sailing state is matched with the power output by the engine 101.
Example 2
The invention provides a control method for a sequential pressurizing system of a trawler, which comprises the following specific trawler operation control steps:
1. when a trawl lowering signal is detected, at this time, the trawler is operated at a constant speed, and as time goes by, the more fish is caught, the controlled booster 108 is turned off when the engine 101 reaches a certain load.
2. The gas valve 1015 and the air valve 1016 then need to be closed simultaneously, and the closing does not cause a surge event to damage the compressor. At the same time the controlled compressor 105 no longer draws air for pressurizing the engine 101, the controlled turbine 104 stops rotating and the entire controlled booster 108 is no longer in operation.
At this time, the high-temperature and high-pressure exhaust gas generated by the engine 101 is only provided for the basic turbine 103, the basic compressor 102 continues to suck air for pressurization, the rotation speed of the basic turbine 103 firstly drops and then rises and finally tends to be stable, the rotation speed of the basic compressor 102 correspondingly drops and then rises and finally tends to be stable, the output power of the engine 101 reaches the typical operation area of the trawl operation state, and at this time, the expected power required by the trawl boat in the trawl operation state is matched with the power output by the engine 101.
Example 3
The present invention proposes a control method for a sequential pressurization system of a trawler, which turns on only the basic booster 107 when the trawler is in a free sailing state and is left of the boundary speed N0 (low speed low load region, as shown in fig. 4-5), and turns on the controlled booster 108 once the boundary speed N0 is exceeded (high speed high load region).
When the trawler is in a trawl operation state, and the trawler sails at a constant low rotation speed and the load is increased, and when the rotation speed of the trawler engine 101 is left to the boundary rotation speed N0 (low rotation speed high load region), the controlled booster 108 is turned off, and the basic booster 107 is left to operate normally (as shown in fig. 6 to 7).
The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (4)
1. A control method for a sequential pressurization system of a trawler, the control method being based on the sequential pressurization system;
the supercharging system comprises a basic supercharger, a controlled supercharger, an engine and a propeller connected with the engine through a transmission shaft; the basic booster comprises a basic turbine and a basic compressor, and the controlled booster comprises a controlled turbine and a controlled compressor;
the basic turbine and the controlled turbine are communicated through an exhaust pipeline at one side of the engine, and a gas valve is arranged on a branch exhaust pipeline of the controlled turbine; the basic air compressor and the controlled air compressor pass through an engine air inlet pipeline at the other side of the engine, and an air valve is arranged on a branch exhaust pipeline of the controlled air compressor;
the control method is characterized by comprising the following specific steps of:
step one: in the free sailing state, the control booster is in a low-rotation-speed low-load area, the basic booster is opened, and the controlled booster is closed; in a high-speed high-load area, opening a controlled supercharger, and maintaining the basic supercharger to operate;
step two: and in the trawl operation state, the controlled supercharger is always closed in a low-rotation-speed high-load area, and the normal operation of the basic supercharger is reserved.
2. A control method for a sequential booster system of a trawler according to claim 1, wherein the basic booster in step 1 is required to be detected that the running speed is less than the boundary speed N0 before being turned on; before the controlled supercharger is turned on, it is necessary to detect that the first operating speed is greater than the boundary speed N0.
3. A control method for a sequential booster system of a trawler according to claim 2, wherein a gas valve in communication with a controlled turbine is opened prior to the controlled booster being opened; the rotational speeds of the basic turbine and the controlled turbine which are connected in parallel through the exhaust pipeline are reversely changed and tend to be balanced; thereafter, the air valve is opened, the controlled compressor is started, the controlled booster is started, and the basic turbine and the controlled turbine speeds are balanced.
4. A control method for a sequential booster system of a trawler according to claim 1, wherein the engine to be detected reaches a critical load value before the controlled booster is turned off in step 2, and the controlled booster is stopped by turning off the gas valve and the air valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211642207.XA CN116146333A (en) | 2022-12-20 | 2022-12-20 | Control method for sequential pressurizing system of trawler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211642207.XA CN116146333A (en) | 2022-12-20 | 2022-12-20 | Control method for sequential pressurizing system of trawler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116146333A true CN116146333A (en) | 2023-05-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211642207.XA Pending CN116146333A (en) | 2022-12-20 | 2022-12-20 | Control method for sequential pressurizing system of trawler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116146333A (en) |
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2022
- 2022-12-20 CN CN202211642207.XA patent/CN116146333A/en active Pending
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