Marine diesel engine main engine power limiting tool with C-shaped mechanical lock and its use method

Abstract

A marine diesel engine main engine power limiting tool with a C-shaped mechanical lock includes a mechanical lock, a sealing strip, a fastening bolt, and a hexagonal nut. The mechanical lock is C-shaped, with a right-angled groove in the middle and a pair of through-holes at opposite ends, with chamfered edges at both ends. The right-angled groove is used for assembly and connection with the end of the throttle limit rocker arm, and the through-hole is provided for the fastening bolt to be installed. The end of the fastening bolt has a hole for the sealing strip to pass through. The throttle limit bolt is installed at the end of the throttle limit rocker arm and limits the rotation range of the throttle limit rocker arm by contacting the throttle limit platform. The throttle limit platform is a steel plate used to limit the throttle limit bolt, thereby limiting the rotation range of the throttle limit rocker arm. The present invention can conveniently and effectively limit the main engine power, so that it can meet the new regulations on EEXI values without affecting the maneuverability and safety of the ship, thereby maintaining the normal operation of the ship.

Description

Technical Field

[0001] The invention relates to a low-speed two-stroke marine diesel engine ship, in particular to a low-speed two-stroke marine diesel engine main engine power limiting tool with a C-shaped mechanical lock and a use method thereof. Background Art

[0002] The decarbonization process of the shipping industry is constantly advancing. The International Maritime Organization encourages all parties related to the shipping industry to work together in technology and operations to achieve decarbonization goals on time.

[0003] With the introduction and gradual implementation of the Ship Energy Efficiency Index (EEXI), ships that do not meet the EEXI requirements after implementation can achieve the required EEXI value 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] 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

[0005] The purpose of the present invention is to improve the main engine and provide a tool and method for limiting the main engine power of a low-speed two-stroke marine diesel engine. This tool can conveniently and effectively limit the main engine power 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.

[0006] To achieve the above-mentioned purpose, the technical solutions of the present invention are as follows:

[0007] A power limiting tool for a marine diesel engine main engine with a C-shaped mechanical lock, the marine diesel engine main engine comprising a throttle limit rocker arm and a throttle limit platform, wherein the power limiting tool comprises a mechanical lock, a sealing strip, a fastening bolt and a hexagonal nut;

[0008] The mechanical lock is C-shaped, with a right-angled groove in the middle, a pair of through holes at opposite ends, and chamfered edges at both ends; the right-angled groove is used to assemble and connect with the end of the throttle limit rocker arm, and the through hole is used to install the fastening bolt; the end of the fastening bolt has a hole for the sealing strip to pass through;

[0009] The throttle limit bolt is installed at the end of the throttle limit rocker arm, and limits the rotation range of the throttle limit rocker arm by contacting the throttle limit platform;

[0010] The throttle limiting platform is a steel plate, which is used to limit the throttle limiting bolt, thereby limiting the rotation range of the throttle limiting rocker arm.

[0011] Preferably, the sealing strip is an RFID (radio frequency identification technology) electronic seal to prevent counterfeiting and tampering.

[0012] Preferably, the throttle limit rocker arm is a rocker arm that rotates as the host throttle changes. By limiting its rotation amplitude, the host throttle can be limited, thereby limiting the host power.

[0013] Preferably, the fastening bolt is a hexagonal head screw with a hole. Based on the M6 hexagonal head full-thread bolt of GB / T 5783 standard, the tail of the screw is drilled, and the hole at the tail of the screw is used to pass through the sealing strip to form a sealing and anti-tampering function.

[0014] 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:

[0015] 1) The original low-speed two-stroke marine diesel engine main engine has a throttle limit rocker arm and a throttle limit platform. The C-shaped mechanical lock is pre-installed at the end of the throttle limit rocker arm, and the position of the through hole on the C-shaped mechanical lock at the end of the throttle limit rocker arm is marked. Then, the C-shaped mechanical lock is temporarily removed;

[0016] 2) Drill a hole at the end of the throttle limit rocker arm according to the marked position;

[0017] 3) After the C-shaped mechanical lock is installed in the correct position, the hexagonal screw with hole bolt is passed through the pair of through holes at the top of the C-shaped mechanical lock, and the hexagonal nut is screwed from the other end of the hexagonal screw with hole bolt with the through hole into the through hole of the hexagonal screw with hole bolt and tightened;

[0018] 4) After passing the sealing strip through the through hole of the hexagonal screw with hole bolt, tighten it and set the information of the built-in chip;

[0019] 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, the hexagonal nut can be loosened, the hexagonal screw with hole bolt can be removed, and the C-shaped mechanical lock can be removed to release the restriction on the main engine, so that the main engine can operate at 100% power;

[0020] 6) After the ship is safe, install the C-shaped mechanical lock according to steps 1) to 3) and replace the new sealing strip, and keep records.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1) Solved the problem that a large number of operating ships could not meet the new IMO regulations on the ship energy efficiency index (EEXI) and could not continue to operate;

[0023] 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;

[0024] 3) Installation and emergency operation are efficient and convenient, and are applicable to both MAN and WinGD hosts. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the C-shaped mechanical lock in the marine diesel engine main engine power limiting tool with a C-shaped mechanical lock according to the present invention.

[0026] Figure 2 Schematic diagram of a hexagonal head screw bolt with a hole and a hexagonal nut 3 in a marine diesel engine main engine power limiting tool with a C-shaped mechanical lock according to the present invention.

[0027] Figure 3 This is a schematic diagram of a marine diesel engine main engine power limiting tool with a C-shaped mechanical lock before installation, wherein a is a main view and b is a side view.

[0028] Figure 4 This is a schematic diagram of the installed marine diesel engine main engine power limiting tool with a C-shaped mechanical lock according to the present invention, wherein a is a main view and b is a side view.

[0029] In the figure, 1-C-shaped mechanical lock, 2-hexagonal head screw with hole bolt, 3-hexagonal nut, 4-sealing strip, 5-throttle limit rocker arm, 6-throttle limit platform, 7-throttle limit bolt 11-through hole, 12-right angle groove DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0031] See also Figure 1 , Figure 2 and Figure 3, are schematic diagrams of the four components of the low-speed two-stroke marine diesel engine main engine power limiting tool of the present invention: a C-shaped mechanical lock 1, a hexagonal head screw with a hole bolt 2, a hexagonal nut 3, and a sealing strip 4. 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 C-shaped mechanical lock 1, a hexagonal head screw with a hole fastening bolt 2, a hexagonal nut 3, and a sealing strip 4.

[0032] The C-shaped mechanical lock 1 is a C-shaped steel structure with chamfered edges, a right-angled groove 12 in the middle and a pair of through holes 11 at the top. The right-angled groove 12 is assembled and connected to the end of the throttle limit rocker arm 5. The top through hole 11 is used to install the fastening bolt 2 with a hexagonal head screw hole, thereby fixing the C-shaped mechanical lock 1. The edge is designed to be chamfered to enable it to better contact with the throttle limit platform.

[0033] The sealing strip 4 is an RFID (radio frequency identification technology) electronic seal to prevent counterfeiting and tampering;

[0034] The throttle limit rocker arm 5 is a rocker arm that rotates as the host throttle changes. By limiting its rotation range, the host throttle can be limited, thereby limiting the host power;

[0035] The hexagonal screw with hole fastening bolt 2 is a GB / T 5783 standard bolt, which is installed at the end of the throttle limit rocker arm 5 and limits the rotation range of the throttle limit rocker arm 5 by contacting the throttle limit platform 6;

[0036] The throttle limiting platform 6 is a common steel plate, which is used to limit the throttle limiting bolt 7 , thereby limiting the rotation range of the throttle limiting rocker arm 5 .

[0037] Figure 3 and Figure 4 They are schematic diagrams before and after installation of the power limiting tool for a low-speed two-stroke marine diesel engine main engine of the present invention, which intuitively reflect the state of the main engine throttle limitation before and after installation of the power limiting tool. Figure 3 This is the original state of the host throttle limit before the host power limit tool is installed. The throttle limit position at this time is 100%. The throttle limit bolt 7 touches the throttle limit platform 6, so the host can run at full power. The throttle 100% limit is set to prevent the host from overloading. Figure 4 In order to achieve the host throttle limiting state after the host power limiting tool is installed, the swing amplitude of the throttle limit rocker arm 5 is shortened by installing the mechanical lock 1, thereby achieving the purpose of limiting the host power.

[0038] The method for using the low-speed two-stroke marine diesel engine main engine power limiting tool of the present invention comprises the following steps:

[0039] 1) The original low-speed two-stroke marine diesel engine main engine has a throttle limit rocker arm 5 and a throttle limit platform 6. The C-shaped mechanical lock 1 is pre-installed at the end of the throttle limit rocker arm 5. The position of the through hole 11 on the C-shaped mechanical lock 1 at the end of the throttle limit rocker arm 5 is marked, and then the C-shaped mechanical lock 1 is temporarily removed;

[0040] 2) According to the marked position, drill a hole 51 at the end of the throttle limit rocker arm 5;

[0041] 3) After the C-shaped mechanical lock 1 is installed in the correct position, the hexagonal screw bolt 2 is passed through the pair of through holes 11 at the top of the C-shaped mechanical lock 1, and the hexagonal nut 3 is screwed onto the screw of the hexagonal screw bolt 2 from the through hole 21 of the hexagonal screw bolt 2 and tightened;

[0042] 4) After the sealing strip 4 is passed through the through hole 21 of the hexagonal screw with hole bolt, it is tightened, and the information of the built-in chip is set and the chip built into the sealing strip 4 is edited to achieve the purpose of anti-counterfeiting and anti-tampering;

[0043] 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, the hexagonal nut 3 can be loosened, the hexagonal screw with hole bolt 2 can be removed, and the C-shaped mechanical lock 1 can be removed to release the restriction on the main engine, allowing the main engine to operate at 100% power;

[0044] 6) After the ship is safe, install the C-shaped mechanical lock 1 and replace the new sealing strip 4, and keep a record. The ship needs to always have an appropriate amount of sealing strips 4 for replacement use.

[0045] Experiments show that the tool of the present invention can conveniently and effectively limit the main engine power, so that it can meet the new regulations on EEXI values without affecting the maneuverability and safety of the ship, thereby maintaining the normal operation of the ship.

[0046] 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 power limiting tool for a marine diesel engine main engine with a C-shaped mechanical lock, the marine diesel engine main engine comprising a throttle limit rocker arm and a throttle limit platform, characterized in that: The power limiting tool includes a mechanical lock, a sealing strip, a fastening bolt and a hexagonal nut; The mechanical lock is C-shaped, with a right-angled groove in the middle, a pair of through holes at opposite ends, and chamfered edges at both ends; the right-angled groove is used to assemble and connect with the end of the throttle limit rocker arm, and the through hole is used to install the fastening bolt; the end of the fastening bolt has a hole for the sealing strip to pass through; The throttle limit bolt is installed at the end of the throttle limit rocker arm, and limits the rotation range of the throttle limit rocker arm by contacting the throttle limit platform; The throttle limiting platform is a steel plate, which is used to limit the throttle limiting bolt, thereby limiting the rotation range of the throttle limiting rocker arm.

2. The marine diesel engine main engine power limiting tool with a C-shaped mechanical lock according to claim 1, characterized in that: The sealing strip is a radio frequency identification technology RFID electronic seal, which is used to prevent counterfeiting and tampering.

3. The marine diesel engine main engine power limiting tool with a C-shaped mechanical lock according to claim 1, characterized in that: The throttle limit rocker arm is a rocker arm that rotates as the host throttle changes. By limiting its rotation amplitude, the host throttle can be limited, thereby limiting the host power.

4. The marine diesel engine main engine power limiting tool with a C-shaped mechanical lock according to claim 1, characterized in that The fastening bolt is a hexagonal head screw with a hole. Based on the M6 hexagonal head full-thread bolt of GB / T 5783 standard, the tail of the screw is drilled. The hole at the tail of the screw is used to pass through the sealing strip to form a sealing and tamper-proof function.

5. The method for using the marine diesel engine main engine power limiting tool with a C-shaped mechanical lock according to any one of claims 1 to 4, characterized in that: The method comprises the following steps: 1) The main engine of the marine diesel engine has a throttle limit rocker arm and a throttle limit platform. The C-shaped mechanical lock is pre-installed at the end of the throttle limit rocker arm. The position of the through hole on the C-shaped mechanical lock at the end of the throttle limit rocker arm is marked. Then, the C-shaped mechanical lock is temporarily removed. 2) Drill a hole at the end of the throttle limit rocker arm according to the marked position; 3) After the C-shaped mechanical lock is installed in the correct position, the hexagonal screw with hole bolt is passed through the pair of through holes at the top of the C-shaped mechanical lock, and the hexagonal nut is screwed from the other end of the hexagonal screw with hole bolt with the through hole into the through hole of the hexagonal screw with hole bolt and tightened; 4) After passing the sealing strip through the through hole of the hexagonal screw with hole bolt, tighten it and set the information of the built-in chip; 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, the hexagonal nut can be loosened, the hexagonal screw with hole bolt can be removed, and the C-shaped mechanical lock can be removed to release the restriction on the main engine, so that the main engine can operate at 100% power; 6) After the ship is safe, install the C-shaped mechanical lock according to steps 1) to 3) and replace the new sealing strip, and keep records.

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