Low-speed two-stroke marine diesel engine main engine power limiting tool and its use method

Abstract

A low-speed two-stroke marine diesel engine 80MC main engine power limiting tool and a method of using the tool, the tool comprising a throttle limiting mechanical lock, a throttle limit rocker arm, a throttle limit bracket, a nut, a fastening bolt, a set screw and a sealing strip. The present invention can conveniently and effectively limit the S80MC main engine power without affecting the maneuverability and safety of the ship, so that the low-speed two-stroke marine diesel engine 80MC main engine power can meet the requirements of the new regulations for the EEXI value, thereby maintaining the normal operation of the ship.

Description

Technical Field

[0001] The invention relates to a low-speed two-stroke marine diesel engine, in particular to an 80MC main engine power limiting tool for a low-speed two-stroke marine diesel engine and a use method thereof. Background Art

[0002] The decarbonization process of the shipping industry is constantly advancing. In 2018, the International Maritime Organization (IMO) proposed the 2030 / 2050 target to reduce carbon emissions in the shipping industry, and passed the IMO short-term emission reduction measures at the MEPC75 meeting in November 2020, namely the introduction of the existing ship energy efficiency index EEXI and the carbon emission intensity index CII, and jointly encouraged all parties related to the shipping industry to work together in technology and operations to achieve the decarbonization goals on time.

[0003] With the introduction and gradual implementation of the Ship Energy Efficiency Index EEXI, IMO requires existing ships to meet the required EEXI value (EEDI 2 / 3 stage standard) once in the annual inspection in 2023 and obtain the International Energy Efficiency Certificate (IEE certificate). The EEXI regulations have little impact on ships that have been built in accordance with the EEDI 2 / 3 stage standards. After the implementation of the regulations, ships that do not meet the EEXI requirements can meet the required EEXI values ​​by limiting their main engine power, using energy-saving devices or switching to alternative fuels, otherwise they will be forced to withdraw from operation.

[0004] Most models only need to design a throttle limit mechanical lock and install it on the host's own throttle limit device (to limit the host's 100% load to prevent overload operation) to achieve the purpose of limiting the host's throttle load. However, compared to most models, the S80MC model itself does not have a built-in throttle load limit device, so it is necessary to design a throttle load limit device based on the actual situation of the host, and cooperate with the throttle limit mechanical lock to achieve the purpose of limiting the host power.

[0005] If ships that do not meet the EEXI requirements want to continue operating after the implementation of the new regulations, they must take additional improvement measures to limit the power of the low-speed two-stroke marine diesel engine 80MC main engine so that the improved ship energy efficiency index EEXI can meet the requirements of the new regulations. The main engine is the main energy-consuming equipment of the ship, and improving the main engine is the most effective and convenient way. Summary of the invention

[0006] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a low-speed two-stroke marine diesel engine S80MC main engine power limiting tool and its use method, which can limit the main engine power to reduce the ship energy efficiency index EEXI. The tool can conveniently and effectively limit the S80MC main engine power, so that it can meet the requirements of the new regulations on EEXI values ​​without affecting the maneuverability and safety of the ship, thereby maintaining the normal operation of the ship.

[0007] To achieve the above-mentioned purpose, the technical solution of the present invention is as follows:

[0008] A low-speed two-stroke marine diesel engine S80MC main engine power limiting tool, which is characterized in that it includes a throttle limiting mechanical lock, a throttle limiting rocker arm, a throttle limiting bracket and a sealing strip;

[0009] The throttle limiting mechanical lock is installed on the throttle limiting bracket, and cooperates with the throttle limiting rocker arm to limit the throttle load of the main engine;

[0010] A through hole is provided in the middle of the throttle limit rocker arm, and the inner diameter of the through hole is the same as the diameter of the oil regulating shaft of the main engine, so that the throttle limit rocker arm is sleeved on the oil regulating shaft and is clamped on the oil regulating shaft by a fastening bolt with a hole on the head and a spring washer, so as to cooperate with the throttle limit mechanical lock to limit the throttle of the main engine; an internal threaded through hole is provided at the tail end of the throttle limit rocker arm, so as to install a hexagonal flat-end set screw, so that the throttle limit rocker arm is fixedly installed on the oil regulating shaft, and the throttle limit rocker arm is prevented from circumferential movement on the oil regulating shaft;

[0011] The throttle limit bracket is installed on the main engine oil adjustment shaft bearing seat bracket to install the throttle limit mechanical lock;

[0012] The hole of the fastening bolt with a hole on the head is used to pass through the sealing strip. Since the throttle limit rocker arm and the throttle limit bracket each have two fastening bolts, as long as the holes on the heads of the two bolts are penetrated with a sealing strip, the bolts can be prevented from being loosened, thereby achieving the purpose of anti-tampering;

[0013] The sealing strips are respectively installed on the fastening bolts and the throttle limiting mechanical lock to prevent counterfeiting and tampering.

[0014] Preferably, the throttle limit rocker arm is a metal processed part. After a through hole with an inner diameter the same as the diameter of the oil regulating shaft is processed in the middle of the throttle limit rocker arm, it is cut along the center line of the through hole from a direction perpendicular to the threaded hole. After cutting, 2 mm is respectively ground off at both ends, and then it is tightened on the oil regulating shaft by the fastening bolts and the set screws to cooperate with the throttle limiting mechanical lock to limit the main engine throttle; in order to prevent the throttle limit rocker arm from circumferential movement on the oil regulating shaft, an internal threaded through hole is designed at the tail end of the rocker arm for installing a hexagonal flat-end set screw to achieve a completely fixed installation of the throttle limit rocker arm on the oil regulating shaft.

[0015] Preferably, the sealing strip is an RFID (radio frequency identification technology) electronic seal, the physical material of which is steel wire, on which serial numbers and company information can be sprayed for product identification, and a built-in chip whose information is set during initial installation to achieve anti-counterfeiting and anti-tampering functions. The chip inside the electronic seal is a passive chip, without an external power supply or a built-in battery. The signal received by the antenna is converted into electrical energy, which can be maintenance-free, low-cost, and long-lasting.

[0016] The method for using the above-mentioned low-speed two-stroke marine diesel engine S80MC main engine power limiting tool is characterized in that the method comprises the following steps:

[0017] 1) Install the throttle limit bracket on the main engine oil adjustment shaft bearing seat bracket and tighten it with fastening bolts, washers and nuts;

[0018] 2) Installing the throttle limit mechanical lock on the throttle limit bracket;

[0019] 3) Install the throttle limit rocker arm on the oil adjustment shaft, and adjust the position of the throttle limit rocker arm so that the axis of the throttle limit rocker arm and the axis of the throttle limit mechanical lock are in the same plane, and at the same time circumferentially adjust the position of the throttle limit rocker arm on the oil adjustment shaft so that when the load is limited, the front end of the throttle limit rocker arm just contacts the throttle limit mechanical lock, and then tighten the fastening bolt and the set screw;

[0020] 4) Temporarily remove the throttle limit mechanical lock, adjust the height of the mounting bolt of the throttle limit mechanical lock protruding from the throttle limit bracket, so that when the main engine is fully loaded, the front end of the throttle limit rocker arm just contacts the tail of the mounting bolt of the throttle limit mechanical lock, then fix the mounting bolt to this position, and reinstall the throttle limit mechanical lock;

[0021] 5) Use three sealing strips to pass through the head holes of the two fastening bolts of the throttle limit rocker arm, the head holes of the two fastening bolts of the throttle limit bracket, and the hole of the throttle limit mechanical lock, tighten them, and set the information of the built-in chip;

[0022] 6) When the ship is sailing in severe sea conditions or encounters other emergencies that threaten the safety of the ship's navigation and it is necessary to release the power limit on the main engine, the sealing strip on the throttle limit mechanical lock is cut off and the mechanical lock is removed so that it can run at full load. The throttle limit rocker arm and throttle limit bracket installed on the ship do not need to be disassembled, and the sealing strip thereon does not need to be moved;

[0023] 7) When the ship is safe, install the throttle limit mechanical lock, replace the new sealing strip, and keep records.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1) Solved the problem that the operating ships equipped with S80MC main engine could not meet the new regulations of IMO on ship energy efficiency index EEXI and could not continue to operate;

[0026] 2) By limiting the main engine power, the improved ship energy efficiency index EEXI can meet the new regulations while also taking into account the reliability and safety of ship navigation;

[0027] 3) The installation and emergency operation are efficient and convenient. The main engine power limiting tool can be installed without disassembling the oil adjustment shaft and other components. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The schematic diagram of the throttle limit rocker arm in the power limiting tool for the main engine of the low-speed two-stroke marine diesel engine S80MC of the present invention, wherein a is the main view and b is the top view.

[0029] Figure 2 This is a schematic diagram of the sealing strip in the main engine power limiting tool of the low-speed two-stroke marine diesel engine S80MC of the present invention, wherein a is a side view and b is a main view.

[0030] Figure 3 The figure is a schematic diagram of the installation of the main engine power limiting tool of the low-speed two-stroke marine diesel engine S80MC of the present invention.

[0031] Figure 4 The present invention is an assembly diagram of a throttle limit rocker arm and a throttle limit mechanical lock of a low-speed two-stroke marine diesel engine S80MC main engine power limiting tool.

[0032] Figure 5It is an assembly diagram of a throttle limit bracket and an oil regulating shaft bearing seat bracket of a low-speed two-stroke marine diesel engine S80MC main engine power limiting tool of the present invention.

[0033] In the figure: 1-throttle limit mechanical lock, 2-throttle limit rocker arm, 3-throttle limit bracket, 4-oil adjustment shaft bearing seat bracket, 5-fastening bolt, 6-gasket, 7-nut, 8-fastening bolt with hole on the head, 9-spring washer, 10-set screw, 11-sealing strip, 12-bearing seat, 13-oil adjustment shaft, 14-throttle limit mechanical lock mounting bolt. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0035] See also Figure 1 and Figure 2 , Figure 1 , Figure 2 They are schematic diagrams of the throttle limit rocker arm and the sealing strip of the S80MC main engine power limiting tool for a low-speed two-stroke marine diesel engine of the present invention, wherein EPL is the abbreviation of Engine Power Limiting, and S / N:000001 is a unique identification number on the surface of each sealing strip, which is similar to the serial number of a machine device.

[0036] See also Figure 3 , Figure 4 , Figure 5 , Figure 3 The figure is a schematic diagram of the installation of the power limiting tool for the low-speed two-stroke marine diesel engine S80MC of the present invention. Figure 4 The present invention is an assembly diagram of a throttle limit rocker arm and a throttle limit mechanical lock of a low-speed two-stroke marine diesel engine S80MC main engine power limiting tool. Figure 5 The assembly diagram of the throttle limit bracket and the oil adjustment shaft bearing seat bracket of the low-speed two-stroke marine diesel engine S80MC main engine power limiting tool of the present invention. As can be seen from the figure, the low-speed two-stroke marine diesel engine S80MC main engine power limiting tool of the present invention includes a throttle limit mechanical lock 1, a throttle limit rocker arm 2, a throttle limit bracket 3, a nut 7, a fastening bolt 8, a set screw 10 and a sealing strip 11;

[0037] The throttle limit mechanical lock 1 is a threaded throttle limit mechanical lock, which is installed on the throttle limit bracket 3 and cooperates with the throttle limit rocker arm 2 to limit the throttle load of the host machine;

[0038] The throttle limit rocker arm 2 is a metal processed part. After a through hole with an inner diameter as large as the diameter of the oil regulating shaft 13 is processed in the middle of the throttle limit rocker arm 2, it is cut along the center line of the through hole from the direction perpendicular to the threaded hole. After cutting, 2 mm is ground off at both ends, and then it is tightened on the oil regulating shaft 13 through the fastening bolt 8 and the set screw 10 to cooperate with the throttle limiting mechanical lock 1 to limit the main engine throttle; in order to prevent the throttle limit rocker arm 2 from circumferential movement on the oil regulating shaft 13, an internal threaded through hole is designed at the tail end of the rocker arm to install a hexagonal flat-end set screw 10, so that the throttle limit rocker arm 2 is completely fixedly installed on the oil regulating shaft 13;

[0039] The throttle limit bracket 3 is a metal processed part, which is installed on the bearing seat bracket of the oil regulating shaft 13 provided by the main engine, and is used to install the throttle limit mechanical lock 1;

[0040] The fastening bolt 8 is a fastening bolt with a hexagonal head and a hole, and the hole in the bolt head is used to pass through the sealing strip 11. Since the throttle limit rocker arm 2 and the throttle limit bracket 3 each have two fastening bolts, as long as the holes in the two bolt heads are penetrated with a sealing strip, the bolts can be prevented from being loosened, thereby achieving the purpose of anti-tampering;

[0041] The sealing strip 11 is an RFID (radio frequency identification technology) electronic seal, which is respectively installed on the fastening bolt 8 and the throttle limit mechanical lock 1 to prevent counterfeiting and tampering; the physical material of the sealing strip 11 is steel wire, which can be sprayed with a serial number and company information for product identification, and has a built-in chip. The chip information is set during the initial installation to achieve the function of anti-counterfeiting and anti-tampering. The chip in the electronic seal is a passive chip, without an external power supply or a built-in battery. The signal received by the antenna is converted into electrical energy, which can be maintenance-free, low cost and long service life.

[0042] The method for using the above-mentioned low-speed two-stroke marine diesel engine S80MC main engine power limiting tool comprises the following steps:

[0043] 1) See Figure 5 During installation, first install the throttle limit bracket 3 on the oil adjustment shaft bearing seat bracket 4, and fasten it with the fastening bolts 5, gaskets 6 and nuts 7; and use the sealing strip 11 to pass through the holes of the two fastening bolts 5 and tighten it.

[0044] 2) See Figure 3 , installing the throttle limiting mechanical lock 1 on the throttle limiting bracket 3;

[0045] 3) Install the throttle limit rocker arm 2 on the oil regulating shaft 13 and adjust its position so that the axis of the throttle limit rocker arm 2 and the axis of the throttle limit mechanical lock 1 are in the same plane, and at the same time, circumferentially adjust the position of the throttle limit rocker arm 2 on the oil regulating shaft 13 so that when the load is limited, the front end of the throttle limit rocker arm 2 just contacts the throttle limit mechanical lock 1, and then tighten the fastening bolt 8 and the set screw 10;

[0046] 4) Temporarily remove the throttle limit mechanical lock 1, see Figure 3 , Figure 4 , adjust the height of the mounting bolt 14 of the throttle limiting mechanical lock 1 protruding from the throttle limiting bracket 3, so that when the main engine is fully loaded, the front end of the throttle limiting rocker arm 2 just contacts the tail end of the mounting bolt 14 of the throttle limiting mechanical lock 1, then fix the mounting bolt 14 to this position, and reinstall the throttle limiting mechanical lock 1;

[0047] 5) Use three sealing strips 11 to pass through the head holes of the two fastening bolts 8 of the throttle limit rocker arm 2, the head holes of the two fastening bolts 14 of the throttle limit bracket 3 and the hole of the throttle limit mechanical lock 1, tighten them, and set the information of the built-in chip;

[0048] 6) When the ship is sailing in severe sea conditions or encounters other emergencies that threaten the safety of the ship's navigation and it is necessary to release the power limit on the main engine, the sealing strip 11 on the throttle limit mechanical lock 1 is cut off and the mechanical lock is removed so that it can run at full load. The throttle limit rocker arm 2 and the throttle limit bracket 3 installed on the ship do not need to be disassembled, and the sealing strips thereon do not need to be moved;

[0049] 7) When the ship is safe, install the throttle limit mechanical lock 1, replace the new sealing strip 11, and keep records.

[0050] Therefore, ships need to always have an appropriate amount of sealing strips for replacement.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-speed two-stroke marine diesel engine main engine power limiting tool, characterized in that: Including throttle limit mechanical lock, throttle limit rocker arm, throttle limit bracket and sealing strip; The throttle limiting mechanical lock is installed on the throttle limiting bracket, and cooperates with the throttle limiting rocker arm to limit the throttle load of the main engine; A through hole is provided in the middle of the throttle limit rocker arm, and the inner diameter of the through hole is the same as the diameter of the oil regulating shaft of the main engine, so that the throttle limit rocker arm is sleeved on the oil regulating shaft and is clamped on the oil regulating shaft by a fastening bolt with a hole on the head and a spring washer, so as to cooperate with the throttle limit mechanical lock to limit the throttle of the main engine; an internal threaded through hole is provided at the tail end of the throttle limit rocker arm, so as to install a hexagonal flat-end set screw, so that the throttle limit rocker arm is fixedly installed on the oil regulating shaft, and the throttle limit rocker arm is prevented from circumferential movement on the oil regulating shaft; The throttle limit bracket is installed on the main engine oil adjustment shaft bearing seat bracket to install the throttle limit mechanical lock; The sealing strip passes through the head holes of the two head-hole fastening bolts of the throttle limit rocker arm, the head holes of the two head-hole fastening bolts of the throttle limit bracket, and the hole of the throttle limit mechanical lock, respectively, to prevent counterfeiting and tampering; The throttle limit rocker arm is installed on the oil adjustment shaft, and the axis of the throttle limit rocker arm is in the same plane as the axis of the mechanical lock, and under a specific load, it is ensured that the front end of the throttle limit rocker arm can just contact the mechanical lock; at the same time, when the main engine is fully loaded, it is ensured that the front end of the throttle limit rocker arm just contacts the tail of the throttle limit mechanical lock mounting bolt.

2. The low-speed two-stroke marine diesel engine main engine power limiting tool according to claim 1, characterized in that: The throttle limit rocker arm is a metal processed part. After a through hole with an inner diameter the same as the diameter of the oil regulating shaft is processed in the middle of the throttle limit rocker arm, it is cut along the center line of the through hole from a direction perpendicular to the threaded hole. After cutting, 2 mm is ground off each of the two ends, and then it is tightened on the oil regulating shaft through the head hole-carrying fastening bolt and the set screw to cooperate with the throttle limiting mechanical lock to limit the main engine throttle; in order to prevent the throttle limit rocker arm from circumferentially moving on the oil regulating shaft, an internal threaded through hole is designed at the tail end of the rocker arm to install a hexagonal flat-end set screw to achieve a completely fixed installation of the throttle limit rocker arm on the oil regulating shaft.

3. The low-speed two-stroke marine diesel engine main engine power limiting tool according to claim 1, characterized in that: The sealing strip is an RFID (radio frequency identification technology) electronic seal, the physical material of which is steel wire. The serial number and company information can be sprayed for product identification. It has a built-in chip, and the chip information is set during the initial installation to achieve anti-counterfeiting and anti-tampering functions. The chip inside the electronic seal is a passive chip, with no external power supply and no built-in battery. It receives signals through an antenna and converts them into electrical energy, so it can be maintenance-free, low-cost and long-lasting.

4. The method for using the low-speed two-stroke marine diesel engine main engine power limiting tool according to any one of claims 1 to 3, characterized in that: The method comprises the following steps: 1) Install the throttle limit bracket on the main engine oil adjustment shaft bearing seat bracket, and fasten it with the head hole fastening bolts, washers and nuts; 2) Installing the throttle limit mechanical lock on the throttle limit bracket; 3) Install the throttle limit rocker arm on the oil adjustment shaft, and adjust the position of the throttle limit rocker arm so that the axis of the throttle limit rocker arm and the axis of the throttle limit mechanical lock are in the same plane, and at the same time circumferentially adjust the position of the throttle limit rocker arm on the oil adjustment shaft so that when the load is limited, the front end of the throttle limit rocker arm just contacts the throttle limit mechanical lock, and then tighten the head hole fastening bolt and the set screw; 4) Temporarily remove the throttle limit mechanical lock, adjust the height of the mounting bolt of the throttle limit mechanical lock protruding from the throttle limit bracket, so that when the main engine is fully loaded, the front end of the throttle limit rocker arm just contacts the tail of the mounting bolt of the throttle limit mechanical lock, then fix the mounting bolt to this position, and reinstall the throttle limit mechanical lock; 5) Use three sealing strips to pass through the head holes of the two head-hole fastening bolts of the throttle limit rocker arm, the head holes of the two head-hole fastening bolts of the throttle limit bracket, and the hole of the throttle limit mechanical lock, tighten them, and set the information of the built-in chip; 6) When the ship is sailing in severe sea conditions or encounters other emergencies that threaten the safety of the ship's navigation and it is necessary to release the power limit on the main engine, the sealing strip on the throttle limit mechanical lock is cut off and the mechanical lock is removed so that it can run at full load. The throttle limit rocker arm and throttle limit bracket installed on the ship do not need to be disassembled, and the sealing strip thereon does not need to be moved; 7) When the ship is safe, install the throttle limit mechanical lock, replace the new sealing strip, and keep records.

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