Device and method for realizing ship energy efficiency index of ship four-stroke engine

Abstract

The invention discloses a device and a method for realizing a ship energy efficiency index by a ship four-stroke engine, relates to the technical field of ship energy efficiency management, and solves the problem that an EPL system in the prior art cannot be flexibly adjusted and quickly responded according to actual requirements of a ship when necessary. Comprising a high-pressure oil pump, the high-pressure oil pump is connected with an oil adjusting shaft, the oil adjusting shaft can accurately control the fuel injection amount of the high-pressure oil pump, and an oil adjusting shaft rocker arm is installed on the oil adjusting shaft; the oil adjusting shaft rocker arm is rotatably connected to the cover plate, the cover plate is connected with an oil mass control valve corresponding to the oil adjusting shaft rocker arm, the oil mass control valve comprises a piston, the oil mass control valve is communicated with a compressed air storage tank through an electromagnetic valve, and the electromagnetic valve is electrically connected with a switch; and the cover plate is connected with a limiting block. The method has the advantages that time and labor are saved, EPL setting can be flexibly adjusted according to actual requirements of the ship, and quick response and support are provided when necessary.

Description

Technical Field

[0001] The invention relates to the technical field of ship energy efficiency management, and in particular to a device and method for realizing a ship energy efficiency index by a ship four-stroke engine. Background Art

[0002] In order to make marine engines meet the requirements of MEPC.335(76) Resolution adopted by the Marine Environment Protection Committee of the International Maritime Organization (IMO) on June 17, 2021: "2021 Guidelines for the use of shaft power / main engine power limitation systems and their reserve power to meet EEXI requirements", the engine needs to be designed with an EPL system. The system itself cannot change the NOx emission level. Only the manager of the EPL system (the captain or the senior crew member on navigational duty OICNW) has the right to temporarily lift the engine power limit.

[0003] The definition of EPL is: the full name is the abbreviation of Engine power limited, which is the engine power limit. The definition of EEXI is: the full name is The Energy Efficiency Existing Ship Index, which is the existing ship energy efficiency index.

[0004] As a technical means to meet these requirements, the EPL system reduces the ship's carbon emissions and energy consumption by limiting the power output of the engine. The EPL system must adopt an anti-tampering mode, use a mechanical control engine, a wire-sealed mechanical stop screw or other equivalent device with a governor limit function as a lead seal device to physically lock the fuel supply amount. If the fuel limit position is to be changed, the lead seal must be cut off so that the crew cannot release the EPL without the permission of the captain or OICNW.

[0005] However, in the daily operation of the ship, the ship will encounter various situations that require more power, such as severe sea conditions, emergency collision avoidance or navigation in ice areas and other special situations. Releasing the EPL system can provide the necessary power reserve to ensure that the ship escapes danger and operates efficiently.

[0006] The existing EPL release system limits the engine power by limiting the amount of oil pumped by the engine's high-pressure oil pump. The engine power is mainly exerted by the high-pressure oil pump to press the fuel into the injector and spray it into the cylinder. The high pressure generated by the piston movement compresses the atomized fuel and ignites it, and the piston connecting rod drives the crankshaft to rotate to generate power. Therefore, limiting the amount of fuel injection can limit the engine power. The injection amount of the high-pressure oil pump is determined by the extended scale of the oil dipstick, that is, the high-pressure oil pump oil dipstick can be limited to the calculated set value to limit the engine power. The oil dipstick is connected to the governor through the oil adjustment shaft. The traditional power lead seal method uses the governor to limit the power. It is not only complex in structure and requires a large installation space, but also a mechanical control method. The removal of the lead seal requires manual operation of the engine, which consumes time and labor. The EPL setting cannot be flexibly adjusted according to the actual needs of the ship, and rapid response and support cannot be provided when necessary.

[0007] Therefore, the present invention proposes a device and method for realizing the ship energy efficiency index of a marine four-stroke engine, so as to solve the above-mentioned problems. Summary of the invention

[0008] The object of the present invention is to provide a device and method for realizing the ship energy efficiency index of a marine four-stroke engine, so as to solve the problem that the EPL system in the prior art cannot be flexibly adjusted and quickly responded to according to the actual needs of the ship when necessary.

[0009] The technical solution adopted by the present invention to solve the technical problem is:

[0010] A device for realizing a ship energy efficiency index for a marine four-stroke engine comprises a high-pressure oil pump and a cylinder and a crankshaft connected to the high-pressure oil pump, wherein the high-pressure oil pump is connected to the cylinder through an injector, the cylinder is rotatably connected to the end of the crankshaft, and the crankshaft can output the power of the marine four-stroke engine by rotation; the high-pressure oil pump is connected to an oil regulating shaft, the oil regulating shaft can accurately control the fuel injection amount of the high-pressure oil pump, the oil regulating shaft is connected to an oil dipstick of the high-pressure oil pump, the oil dipstick is connected to a speed regulator through the oil regulating shaft, an oil regulating shaft rocker arm is installed on the oil regulating shaft, and the oil regulating shaft rocker arm is locked with the oil regulating shaft through a locating pin; the oil regulating shaft rocker arm is rotatably connected to a cover plate, an oil quantity control valve is connected to the cover plate corresponding to the oil regulating shaft rocker arm, the oil quantity control valve comprises a piston, the oil quantity control valve is connected to a compressed air storage tank through an electromagnetic valve, and the electromagnetic valve is electrically connected to a switch.

[0011] Furthermore, a limiting block is connected to the cover plate corresponding to the limiting screw, and the limiting block is locked with the cover plate by means of lead sealing.

[0012] By adopting the above technical solution, the position of the limit block cannot be changed. Once the engine is installed with this system and power is limited, the power limit cannot be adjusted unless the mechanical seal is cut off, which has the mandatory reliability of the limit.

[0013] Furthermore, a sensor is provided inside the cover plate at a position corresponding to the limit block, and the sensor is electrically connected to the ship console.

[0014] By adopting the above technical solution, an oil regulating shaft is installed on the engine, and the oil regulating shaft is connected to the oil dipstick of each cylinder high-pressure oil pump. The rotation of the oil regulating shaft can adjust the scale of the oil dipstick. At the same time, an oil regulating shaft rocker arm is installed on the oil regulating shaft. It is locked with a positioning pin. By limiting the rotation of the rocker arm, the rotation of the oil regulating shaft can be limited, thereby limiting the scale of the oil dipstick and the power of the engine.

[0015] Furthermore, one end of the oil regulating shaft rocker arm away from the oil regulating shaft is connected with a limit screw, and the limit screw is locked with the oil regulating shaft rocker arm by means of a lead seal.

[0016] By adopting the above technical solution, the precise limit position of the oil dipstick can be adjusted by the limit screw. Once the position is determined, it is locked by a lead seal to prevent tampering, and the position cannot be changed.

[0017] Furthermore, the switch is electrically connected to a monitoring instrument light; and the switch is electrically connected to a ship control console.

[0018] By adopting the above technical solution, the signal in the ship's console can show that EEXI is released and record the data.

[0019] Furthermore, the solenoid valve is connected to a compressed air storage tank via a pressure reducing valve.

[0020] By adopting the above technical solution, the outlet pressure can be kept stable when the inlet pressure fluctuates, thereby ensuring the stability and safety of the device operation.

[0021] Furthermore, the speed regulator is connected to an oil dipstick scale indicator panel.

[0022] By adopting the above technical solution, when the oil dipstick scale is limited, it can be observed and adjusted from the oil dipstick scale indicator panel.

[0023] Furthermore, a connecting ear is provided at one end of the oil regulating shaft rocker arm close to the oil regulating shaft, and a tension spring is connected between the connecting ear and the cover plate.

[0024] By adopting the above technical solution, the tension spring plays the role of resetting, buffering, adjusting tension and maintaining stability, which together ensure the normal operation of the device.

[0025] Another aspect of the present application further discloses a method for realizing the device for realizing the ship energy efficiency index of a marine four-stroke engine as described in any of the above items, comprising the following steps:

[0026] S1. Cut off the mechanical seal of the limit block, turn off the EPL system, the signal in the ship's console shows that EEXI is released, and the indicator light on the local monitor is off;

[0027] S2. Compress the air until the oil quantity control valve is cut off, thereby releasing the piston in the oil quantity control valve and canceling the position restriction on the rocker arm of the oil regulating shaft;

[0028] S3. The restriction on the rotation angle of the oil regulating shaft is released, thereby releasing the restriction on the oil dipstick scale of the high-pressure oil pump, and then releasing the restriction on the total amount of fuel injected into the engine cylinder by the high-pressure oil pump, that is, the engine can exert its maximum power.

[0029] Furthermore, the EPL system has switch display and monitor light indication functions.

[0030] Further, when the electronically controlled EPL system is released, the switch of the EPL system points to the "off" side, and the indicator light on the local monitor goes out; when the power is limited, the switch of the EPL system points to the "on" side; the indicator light on the local monitor turns on.

[0031] In summary, the present invention limits the rotation angle of the oil regulating shaft through the oil quantity control valve and the limit block, thereby limiting the oil dipstick scale of the high-pressure oil pump, and then limiting the total amount of fuel injected into the engine cylinder by the high-pressure oil pump, which can limit the power that the engine can exert. When the switch is disconnected, the compressed air to the oil quantity control valve is cut off, the limit block is mechanically sheared off, the supporting force of the valve plunger disappears, the plunger can be pressed back, and the oil regulating shaft rocker arm can freely exceed the fuel limit position. There is no need to manually operate the engine, saving time and labor, and the EPL setting can be flexibly adjusted according to the actual needs of the ship, providing rapid response and support when necessary.

[0032] The present invention is connected to the compressed air storage tank through the oil quantity control valve through the solenoid valve, the solenoid valve is connected to the compressed air storage tank through the pressure reducing valve, and the solenoid valve is electrically connected to the switch. The oil quantity control valve is installed on the engine and is controlled by compressed air, so that the oil regulating shaft rocker arm can be limited to the oil limit position of the high-pressure oil pump dipstick. The switch is electrically connected to the monitoring instrument light; the switch is electrically connected to the ship console. The signal in the ship console shows that EEXI is released, and then the data of the EEXI release process is recorded. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the engine structure of the present invention;

[0034] Figure 2 It is a schematic diagram of the structure of the engine part of the present invention;

[0035] Figure 3 It is a schematic diagram of the internal structure of the engine of the present invention;

[0036] Figure 4 The working state of the present invention is shown in FIG. Figure 1 ;

[0037] Figure 5 The working state of the present invention is shown in FIG. Figure 2 ;

[0038] Figure 6 It is a structural schematic diagram of the oil adjustment shaft rocker arm;

[0039] In the figure: 1. high-pressure oil pump; 2. cylinder; 3. crankshaft; 4. oil regulating shaft; 5. oil dipstick; 6. speed governor; 7. oil regulating shaft rocker arm; 9. cover plate; 10. oil quantity control valve; 11. solenoid valve; 12. compressed air storage tank; 13. switch; 14. limit screw; 15. limit block; 16. pressure reducing valve; 17. oil dipstick scale indicator panel; 18. connecting ear; 19. tension spring. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In this application, the directions or positional relationships indicated by the terms "upper", "inner", "outer", "middle", etc. are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0042] like Figure 1-4As shown, a device for realizing the ship energy efficiency index of a marine four-stroke engine comprises a high-pressure oil pump 1 and a cylinder 2 and a crankshaft 3 connected to the high-pressure oil pump 1. The high-pressure oil pump 1 is connected to the cylinder 2 through an injector, and the cylinder 2 is rotatably connected to the end of the crankshaft 3. The crankshaft 3 can output the power of the marine four-stroke engine by rotation; the high-pressure oil pump 1 is connected to an oil regulating shaft 4, and the oil regulating shaft 4 can accurately control the fuel injection amount of the high-pressure oil pump 1. The oil regulating shaft 4 is connected to an oil dipstick 5 of the high-pressure oil pump 1, and the oil dipstick 5 is connected to a speed regulator 6 through the oil regulating shaft 4. The speed regulator 6 is connected to an oil dipstick scale indicator panel 17. Furthermore, when the oil dipstick 5 is limited in scale, it can be observed and adjusted from the oil dipstick scale indicator panel 17. An oil regulating shaft rocker arm 7 is installed on the oil regulating shaft 4, and the oil regulating shaft rocker arm 7 is locked with the oil regulating shaft 4 by a locating pin 8; the engine power is mainly exerted by the high-pressure oil pump 1 to press the fuel into the injector and spray it into the cylinder 2. The high pressure generated by the piston movement compresses the atomized fuel and drives the crankshaft 3 to rotate through the piston connecting rod to generate power. Therefore, limiting the fuel injection amount can limit the engine power. The injection amount of the high-pressure oil pump 1 is determined by the extended scale of the oil dipstick 5, that is, the oil dipstick 5 of the high-pressure oil pump 1 can be limited to the calculated set value to limit the engine power. The oil dipstick 5 is connected to the speed regulator 6 through the oil regulating shaft 4. The traditional power lead sealing method is to use the speed regulator 6 to limit the power. The present invention limits the rotation angle of the oil regulating shaft 4, thereby limiting the scale of the oil dipstick 5 of the high-pressure oil pump 1, and then limits the total amount of fuel injected into the engine cylinder 2 by the high-pressure oil pump 1, which can limit the power that the engine can exert.

[0043] The engine is equipped with an oil regulating shaft 4, which is connected to the oil dipstick 5 of each cylinder high pressure oil pump 1. The rotation of the oil regulating shaft 4 can adjust the scale of the oil dipstick 5. At the same time, an oil regulating shaft rocker arm 7 is installed on the oil regulating shaft 4. It is locked with a positioning pin 8. By limiting the rotation of the rocker arm, the rotation of the oil regulating shaft 4 can be limited, thereby limiting the scale of the oil dipstick 5 and the power of the engine.

[0044] like Figure 5 and Figure 6 As shown, the oil regulating shaft rocker arm 7 is rotatably connected to the cover plate 9, and the cover plate 9 is connected to an oil quantity control valve 10 corresponding to the oil regulating shaft rocker arm 7. The oil quantity control valve 10 includes a piston, and the oil quantity control valve 10 is connected to the compressed air storage tank 12 through the solenoid valve 11. The solenoid valve 11 is connected to the compressed air storage tank 12 through the pressure reducing valve 16, and the solenoid valve 11 is electrically connected to the switch 13. The oil quantity control valve 10 is installed on the engine and is controlled by compressed air. It can limit the oil regulating shaft rocker arm 7 to the oil limit position of the high-pressure oil pump 1 oil dipstick 5. The switch 13 is electrically connected to the monitor light; the switch 13 is electrically connected to the ship console. The signal in the ship console can show that EEXI is released and record data.

[0045] The end of the oil regulating shaft rocker arm 7 close to the oil regulating shaft 4 is provided with a connecting ear 18, and a tension spring 19 is connected between the connecting ear 18 and the cover plate 9. The end of the oil regulating shaft rocker arm 7 away from the oil regulating shaft 4 is connected to the limit screw 14, and the limit screw 14 is locked with the oil regulating shaft rocker arm 7 by means of a lead seal. When the limited power of the engine is determined, the precise limit position of the oil dipstick 5 can be adjusted by the limit screw 14. After the position is determined, it is locked by a lead seal to prevent tampering, and the position cannot be changed. The limit block 15 is connected to the corresponding limit screw 14 on the cover plate 9, and the limit block 15 is locked with the cover plate 9 by means of a lead seal. In addition, the position of the limit block 15 cannot be changed. Once the engine is installed with this system for power limitation, the power limit cannot be adjusted unless the mechanical lead seal is cut, which has the mandatory reliability of the limit. A sensor is provided at the position corresponding to the limit block 15 inside the cover plate 9, and the sensor is electrically connected to the ship control console.

[0046] When the switch 13 is disconnected, the compressed air to the oil control valve 10 is cut off, the limit block 15 is mechanically sheared, the support force of the valve plunger disappears, and the plunger can be pressed back. At this time, the oil adjustment shaft rocker arm 7 can freely exceed the fuel limit position. At the same time, the ship console signal shows that EEXI has been released, the indicator light on the local monitor goes out, and the power is released.

[0047] When the switch 13 is turned on, compressed air enters the oil quantity control valve 10, and the plunger in the valve is in a deadlocked state. At this time, the oil regulating shaft rocker arm 7 is restricted and cannot exceed the oil limit position. The signal in the ship's console shows that EEXI is working or the indicator light on the local monitor shows green, and the power is limited at this time.

[0048] A method for realizing a device for realizing a ship energy efficiency index of a marine four-stroke engine comprises the following steps:

[0049] S1. Cut off the mechanical seal of the limit block, turn off the EPL system, the signal in the ship console shows that EEXI is released, and the indicator light on the local monitor is off; the switch 13 is electrically connected to the monitor light; the switch 13 is electrically connected to the ship console. The signal in the ship console can show that EEXI is released and record the data. The EPL system has the switch display and monitor light indication functions.

[0050] When the electronically controlled EPL system is released, the switch of the EPL system points to the "off" side, and the indicator light on the local monitor goes out; when the power is limited, the switch of the EPL system points to the "on" side; the indicator light on the local monitor turns on.

[0051] S2. The compressed air to the oil quantity control valve 10 is cut off, thereby releasing the piston in the oil quantity control valve and canceling the position limit of the oil regulating shaft rocker arm 7; when the switch 13 is disconnected, the compressed air to the oil quantity control valve 10 is cut off, the limit block 15 is mechanically sheared off, the supporting force of the valve plunger disappears, and the plunger can be pressed back. At this time, the oil regulating shaft rocker arm 7 can freely exceed the fuel limit position.

[0052] S3. The restriction on the rotation angle of the oil regulating shaft 4 is released, thereby releasing the restriction on the scale of the oil dipstick 5 of the high-pressure oil pump 1, and then releasing the restriction on the total amount of fuel injected into the engine cylinder 2 by the high-pressure oil pump 1, that is, the engine can exert its maximum power.

[0053] It should be noted that the term "including" and its variations used in the embodiments of the present invention are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". The modifications of "one" and "multiple" mentioned in the embodiments of the present invention are illustrative rather than restrictive. Those skilled in the art should understand that unless the context clearly indicates otherwise, it should be understood as "one or more".

[0054] The user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in the embodiments of the present invention are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant laws, regulations and standards of relevant countries and regions, and provide corresponding operation entrances for users to choose to authorize or refuse.

[0055] The various steps described in the method implementation methods provided in the embodiments of the present invention may be performed in different orders and / or in parallel. In addition, the method implementation methods may include additional steps and / or omit the steps shown. The scope of protection of the present invention is not limited in this respect.

[0056] The term "embodiment" in this specification refers to specific features, structures or characteristics described in conjunction with the embodiment that can be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily mean the same embodiment, nor does it mean that it is mutually exclusive with other embodiments and is independent or optional. The various embodiments in this specification are described in a related manner, and the same or similar parts between the various embodiments refer to each other. In particular, for the device, equipment, and system embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts refer to the partial description of the method embodiment.

[0057] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of patent protection. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the attached claims.

Claims

1. A device for realizing a ship energy efficiency index of a marine four-stroke engine, comprising a high-pressure oil pump (1) and a cylinder (2) and a crankshaft (3) connected to the high-pressure oil pump (1), wherein: The high-pressure oil pump (1) is connected to the cylinder (2) through an injector, and the cylinder (2) is rotatably connected to the end of the crankshaft (3), and the crankshaft (3) can output the power of the marine four-stroke engine by rotation; the high-pressure oil pump (1) is connected to an oil regulating shaft (4), and the oil regulating shaft (4) can accurately control the fuel injection amount of the high-pressure oil pump (1); the oil regulating shaft (4) is connected to an oil dipstick (5) of the high-pressure oil pump (1), and the oil dipstick (5) is connected to a speed regulator (6) through the oil regulating shaft (4); and an oil regulating shaft rocker arm (7) is installed on the oil regulating shaft (4); The oil regulating shaft rocker arm (7) is rotatably connected to the cover plate (9); an oil quantity control valve (10) is connected to the cover plate (9) corresponding to the oil regulating shaft rocker arm (7); the oil quantity control valve (10) comprises a piston; the oil quantity control valve (10) is communicated with a compressed air storage tank (12) via an electromagnetic valve (11); the electromagnetic valve (11) is electrically connected to a switch (13); a limit block (15) is connected to the cover plate (9); the limit block (15) is locked with the cover plate (9) by means of a lead seal; a sensor is arranged inside the cover plate (9) at a position corresponding to the limit block (15); the sensor is electrically connected to a ship control console.

2. The device for realizing the ship energy efficiency index of a marine four-stroke engine according to claim 1, characterized in that: One end of the oil regulating shaft rocker arm (7) away from the oil regulating shaft (4) is connected to a limit screw (14), and the limit screw (14) is locked with the oil regulating shaft rocker arm (7) by means of lead sealing.

3. The device for realizing the ship energy efficiency index of a marine four-stroke engine according to claim 2, characterized in that: The switch (13) is electrically connected to the monitor light; the switch (13) is electrically connected to the ship control console.

4. The device for realizing the ship energy efficiency index of a marine four-stroke engine according to claim 1, characterized in that: The solenoid valve (11) is connected to the compressed air storage tank (12) via a pressure reducing valve (16).

5. The device for realizing the ship energy efficiency index of a marine four-stroke engine according to claim 1, characterized in that: The speed regulator (6) is connected to an oil dipstick scale indicator panel (17).

6. The device for realizing the ship energy efficiency index of a marine four-stroke engine according to claim 1, characterized in that: A connecting ear (18) is provided at one end of the oil regulating shaft rocker arm (7) close to the oil regulating shaft (4), and a tension spring (19) is connected between the connecting ear (18) and the cover plate (9).

7. The device for realizing the ship energy efficiency index of a marine four-stroke engine according to claim 1, characterized in that: The oil regulating shaft rocker arm (7) is locked with the oil regulating shaft (4) via a positioning pin.

8. A method for realizing a device for realizing a ship energy efficiency index of a marine four-stroke engine according to any one of claims 1 to 8, characterized in that: The steps include: S1. Cut off the limit block (15) mechanical seal, close the EPL system, and the signal in the ship console shows that EEXI is released; S2. The compressed air to the oil quantity control valve (10) is cut off, thereby releasing the piston in the oil quantity control valve (10) and canceling the position restriction of the oil adjustment shaft rocker arm (7); S3. The restriction on the rotation angle of the oil regulating shaft (4) is released, thereby releasing the restriction on the scale of the oil dipstick (5) of the high-pressure oil pump (1), and then releasing the restriction on the total amount of fuel injected by the high-pressure oil pump (1) into the engine cylinder (2), that is, the engine can exert its maximum power.

9. The method for realizing the device for realizing the ship energy efficiency index of a marine four-stroke engine according to claim 8, characterized in that: The EPL system has switch display and monitoring instrument light indication functions.

10. The method for realizing the device for realizing the ship energy efficiency index of a marine four-stroke engine according to claim 9, characterized in that the electronic control When the EPL system is released, the switch of the EPL system points to the "off" side and the indicator light on the local monitor goes out; when the power is limited, the switch of the EPL system points to the "on" side and the indicator light on the local monitor turns on.

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