Low-speed two-stroke marine diesel engine main engine power limiter tool

Abstract

A low-speed, two-stroke marine diesel engine main engine power limiter tool, consisting of a mechanical lock, a hexagonal head bolt with a hole, and a sealing strip, can conveniently and effectively limit main engine power, ensuring compliance with the new EEXI requirements without compromising vessel maneuverability and safety, thereby maintaining normal vessel operations.

Description

Technical Field

[0001] The invention relates to a low-speed two-stroke marine diesel engine, in particular to a main engine power limiting tool for a low-speed two-stroke marine diesel engine. Background Art

[0002] With the introduction and gradual implementation of the Energy Efficiency Index (EEXI), the IMO requires existing ships to meet the required EEXI values (EEDI Phase 2 / 3 standards) at their annual inspection in 2023 and obtain an International Energy Efficiency Certificate (IEE Certificate). The EEXI regulations will have little impact on ships already built to EEDI Phase 2 / 3 standards. After implementation, ships that fail to meet the EEXI requirements can achieve 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.

[0003] If ships that do not meet the EEXI requirements after the new regulations are implemented want to continue operating, they must take improvement measures to ensure that the improved EEXI meets the requirements of the new regulations. The main engine is the main energy consumer of the ship, and improving the main engine is the most effective and convenient way to do so. Summary of the Invention

[0004] The purpose of the present invention is to provide a low-speed two-stroke marine diesel engine main engine power limiter tool and usage method. The tool can conveniently and effectively limit the main engine power, enabling the ship to meet the new regulations on EEXI values without affecting the maneuverability and safety of the ship, thereby maintaining the normal operation of the ship.

[0005] To achieve the above-mentioned purpose, the technical solutions of the present invention are as follows:

[0006] A low-speed two-stroke marine diesel engine main engine power limiting tool is characterized in that it includes a mechanical lock, a hexagonal head bolt with a hole, and a sealing strip;

[0007] The main body of the mechanical lock is a cylinder with a spherical top and a square middle. It is a steel structure with an internal threaded through hole inside to limit the power of the host. The upper part of the mechanical lock is provided with four through holes with a diameter slightly larger than the sealing strip for the sealing strip to pass through. The lower part is an adjustable area. The overall height of the mechanical lock is controlled by controlling the height of the lower part. The interior is an internal threaded bolt hole for assembly and connection with a hexagonal head bolt with a hole.

[0008] The hexagonal head bolt with a hole is a modified part according to GB / T 5783 standard, and is used for assembly and installation with the mechanical lock. The head of the hexagonal head bolt with a hole has a drilled hole for the sealing strip to pass through;

[0009] The sealing strip is an RFID (radio frequency identification technology) electronic seal, which is used to prevent counterfeiting and tampering.

[0010] The method for using the above-mentioned low-speed two-stroke marine diesel engine main engine power limiting tool is characterized in that the method comprises the following steps:

[0011] 1) The original low-speed two-stroke marine diesel engine has a limit bracket and a throttle rocker arm. The limit bracket 4 is a mounting bracket for a tool to limit the main engine power. The throttle rocker arm rotates as the main engine throttle changes. By limiting its rotation range, the main engine throttle and thus the main engine power can be limited. Specifically, the protruding distance X of the original limit bolt on the limit bracket is measured and recorded, and then the original limit bolt is removed.

[0012] 2) Install the hexagonal head bolt with a hole on the limit bracket, and the position is consistent with the original limit bolt;

[0013] 3) Adjust the height of the mechanical lock according to the desired throttle position, and then install it on the hexagonal head bolt with a hole;

[0014] 4) After passing the sealing strip through the through hole of the mechanical lock and the drilled hole of the hexagonal head bolt, tighten it and set the information of the built-in chip;

[0015] 5) When the ship is sailing in severe sea conditions or encountering other emergencies that threaten the safety of the ship's navigation, the sealing strip can be cut off and the mechanical lock removed to release the restriction on the main engine, allowing the main engine to operate at 100% power;

[0016] 6) When the ship is safe, install the main engine power limiting tool and replace the new sealing strip, and keep records.

[0017] The mechanical lock is made of 45# steel with a blackened surface treatment for rust and corrosion resistance. The top is designed to be spherical so that it can better fit the throttle rocker arm. The upper part is provided with four through holes for passing the sealing strip to form a tamper-proof seal. The middle part has a square cross-section and is the fulcrum of the wrench for tightening. The lower part is an adjustable area. The overall height of the mechanical lock can be controlled by controlling the height of the lower part. The internal part is an internal threaded bolt hole for assembly and connection with the hexagonal head bolt with a hole.

[0018] The sealing strip is an RFID (Radio Frequency Identification) electronic seal made of steel wire. It can be sprayed with a serial number and company information for product identification. It also has a built-in chip, whose information is set during initial installation, to provide anti-counterfeiting and anti-tampering features. The chip inside the electronic seal is passive, requiring no external power supply or internal battery. It receives signals through an antenna and converts them into electricity, making it maintenance-free, low-cost, and long-lasting.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1) The present invention solves the problem that a large number of operating ships cannot meet the new IMO regulations on the ship energy efficiency index (EEXI) and thus cannot continue to operate;

[0021] 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;

[0022] 3) Installation and emergency operation are efficient and convenient, and are applicable to both MAN and WinGD hosts. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the mechanical lock of the low-speed two-stroke marine diesel engine main engine power limiting tool of the present invention.

[0024] Figure 2 The figure is a schematic diagram of a hexagonal head bolt with a hole in the main engine power limiting tool for a low-speed two-stroke marine diesel engine according to the present invention.

[0025] Figure 3 Schematic diagram of the sealing strip of the low-speed two-stroke marine diesel engine main engine power limiting tool of the present invention.

[0026] Figure 4 This is a schematic diagram of the installation of the low-speed two-stroke marine diesel engine main engine power limiting tool of the present invention.

[0027] In the figure, 1-threaded mechanical lock, 11-spherical surface, 12-square surface, 13-internal thread through hole, 14-through hole; 2-hexagonal head bolt with hole, 3-sealing strip, 4-throttle limit bracket, 5-throttle limit rocker arm. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments of the present invention and the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figure 1 、 Figure 2 and Figure 3 , Figure 1 、 Figure 2 and Figure 3 They are schematic structural diagrams of a mechanical lock, a hexagonal head bolt with a hole, and a sealing strip of the low-speed two-stroke marine diesel engine main engine power limiting tool of the present invention.

[0030] Figure 4 This diagram illustrates the installation of a low-speed, two-stroke marine diesel engine main engine power limiter, visually depicting the main engine throttle control before and after installation. The left side shows the main engine throttle control before installation. At this point, the throttle limit is at 100%, allowing the main engine to operate at full power. Setting the 100% throttle limit prevents overload. The right side shows the main engine throttle control after installation. The mechanical lock 1 shortens the swing range of the throttle rocker arm 5, thereby limiting the main engine power.

[0031] As can be seen from the figure, the low-speed two-stroke marine diesel engine main engine power limiting tool of the present invention includes a mechanical lock 1, a hexagonal head bolt with a hole 2 and a sealing strip 3;

[0032] See also Figure 1 The main body of the mechanical lock 1 is a cylinder with a spherical surface 11 at the top and a square shape 12 in the middle. It is provided with a steel structure with an internal threaded through hole 13 inside to limit the power of the host. The upper part of the mechanical lock 1 is provided with four through holes 14 with a diameter slightly larger than that of the sealing strip 3 for the sealing strip 3 to pass through; the lower part is an adjustable area, and the overall height of the mechanical lock is controlled by controlling the height of the lower part. The interior is an internal threaded bolt hole for assembly and connection with a hexagonal head bolt with a hole;

[0033] See also Figure 2 The hexagonal head bolt with a hole 2 is a modified part of the GB / T 5783 standard, which is used to assemble and install with the mechanical lock 1. The head of the hexagonal head bolt with a hole 2 has a drilled hole 21 for the sealing strip 3 to pass through;

[0034] See also Figure 3 The sealing strip 3 is an RFID (radio frequency identification technology) electronic seal to prevent counterfeiting and tampering;

[0035] The method for using the above-mentioned low-speed two-stroke marine diesel engine main engine power limiting tool comprises the following steps:

[0036] 1) See Figure 4The original low-speed two-stroke marine diesel engine has a limit bracket 4 and a throttle rocker arm 5. The limit bracket 4 is a mounting bracket for a tool to limit the main engine power. The throttle rocker arm 5 is a rocker arm that rotates as the main engine throttle changes. By limiting its rotation range, the main engine throttle can be limited, thereby limiting the main engine power. That is, the protruding distance X of the original limit bolt on the limit bracket 4 is measured and recorded, and the original limit bolt is removed;

[0037] 2) Install the hexagonal head bolt 2 with a hole, and measure its protruding distance X on the limit bracket 4 to ensure it is consistent with the previous one. After confirming that it is correct, tighten the locking bolt under the limit bracket 4;

[0038] 3) Adjust the height of the mechanical lock 1 according to the desired throttle position, and then install it on the hexagonal head bolt 2;

[0039] 4) After passing the sealing strip 3 through the through hole 14 of the mechanical lock 1 and the drilled hole 21 of the hexagonal head bolt 2, tighten it and set the information of the built-in chip;

[0040] 5) When the ship is sailing in severe sea conditions or encountering other emergencies that threaten the safety of the ship's navigation, the sealing strip 4 can be cut off and the mechanical lock 1 removed to release the restriction on the main engine, allowing the main engine to operate at 100% power;

[0041] 6) When the ship is safe, install the main engine power limiting tool and replace the new sealing strip 3, and keep records.

[0042] Experiments have shown that the present invention can conveniently and effectively limit the main engine power, enabling the ship to meet the new regulations on EEXI values without affecting the ship's maneuverability and safety, thereby maintaining the normal operation of the ship.

[0043] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the 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: It comprises a mechanical lock (1), a hexagonal head bolt with a hole (2) and a sealing strip (3); The main body of the mechanical lock (1) is a cylinder, with a spherical top (11) and a square middle (12). A steel structure with an internal threaded through hole (13) is provided inside the mechanical lock (1) for limiting the power of the host. The upper part of the mechanical lock (1) is provided with four through holes (14) with a diameter slightly larger than that of the sealing strip (3) for the sealing strip (3) to pass through. The lower part is an adjustable area, and the overall height of the mechanical lock is controlled by controlling the height of the lower part. The inner part is an internal threaded bolt hole for assembly and connection with a hexagonal head bolt with a hole. The hexagonal head bolt with a hole (2) is a modified part according to the GB / T 5783 standard, and is used for assembly and installation with the mechanical lock (1). The head of the hexagonal head bolt with a hole (2) has a drill hole (21) for the sealing strip (3) to pass through. The sealing strip (3) is an electronic seal using radio frequency identification technology, which is used to prevent counterfeiting and tampering.

2. The method for using the low-speed two-stroke marine diesel engine main engine power limiting tool according to claim 1, characterized in that: The method comprises the following steps: 1) The original low-speed two-stroke marine diesel engine has a limit bracket (4) and a throttle rocker arm (5), wherein the limit bracket (4) is a mounting bracket for a tool for limiting the main engine power; the throttle rocker arm (5) is a rocker arm that rotates as the main engine throttle changes, and by limiting its rotation amplitude, the main engine throttle is limited, thereby limiting the main engine power; that is, the protruding distance X of the original limit bolt on the limit bracket (4) is measured, and after making a record, the original limit bolt is removed; 2) Install the hexagonal head bolt with a hole (2) on the limiting bracket (4) in the same position as the original limiting bolt; 3) Adjust the height of the mechanical lock (1) according to the desired throttle position, and then install it on the hexagonal head bolt (2); 4) After the sealing strip (3) is passed through the through hole (14) of the mechanical lock (1) and the drill hole (21) of the hexagonal head bolt (2), it is tightened and the information of the built-in chip is set; 5) When the ship is sailing in severe sea conditions or encountering other emergencies that threaten the safety of the ship's navigation, the sealing strip (3) is cut off, the mechanical lock (1) is removed, and the restriction on the main engine is released, so that the main engine can operate at 100% power; 6) When the ship is safe, install the main engine power limiting tool and replace the new sealing strip (3), and keep records.

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