Power reduction accelerator limiting mechanical locking device and method for marine two-stroke diesel engine
By designing a mechanical locking device for power reduction throttle limit of marine two-stroke diesel engines with simple structure, using the combination of threaded fit and wire rope seals, the locking and emergency release of the throttle limit device under power limit of marine diesel engines is solved. Ensure the safe and effective operation of the diesel engine.
Patent Information
- Application Number
- CN202311000037.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-08-10
- Publication Date
- 2025-02-18
AI Technical Summary
To meet the limits of the EEXI index, the ship needs to limit the power of the diesel engine, but this requires a matching throttle limit mechanical locking device to prevent crew members from tampering with or misoperating, and in an emergency situation, it is necessary to quickly unlock the lock.
A simple structure of marine two-stroke diesel engine power reduction throttle limit mechanical locking device is designed. The limit bolts, locking blocks, nuts and fixed-distance sleeves are assembled by threads, and the wire rope and lead seal are used to achieve locking and release. Function.
The effective locking of the throttle limit device is achieved to prevent illegal operation of the crew, and at the same time, it is easy to unlock in an emergency, ensuring that the diesel engine operates according to the specified throttle set value.
Smart Images
Figure CN119467100A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a marine two-stroke diesel engine for mechanically controlling fuel injection A throttle limit mechanical locking device and method. Background Art
[0002] In order to reduce greenhouse gas emissions from shipping vessels, the International Maritime Organization (IMO) introduced EEXI, the concept of the existing ship energy efficiency design index, and the EEXI requirements will take effect in 2023. For ships with EEXI index higher than the IMO limit, the standard can be achieved by limiting the diesel engine power (EPL), that is, limiting the working range of the throttle. According to the relevant requirements of IMO, under normal circumstances, the power of the diesel engine will be limited. In case of emergency, the reserve power of the engine can be released to ensure the safe operation of the ship. In order to prevent the crew from tampering with the throttle limit device or misoperation, a matching throttle limit mechanical locking device and method are required. Summary of the invention
[0003] In view of the above requirements and difficulties, the present invention designs a throttle limit mechanical locking device and method for a marine diesel engine which has a simple structure and is easy to construct.
[0004] The technical solution of the present invention is: a mechanical locking device for reducing power throttle position of a two-stroke diesel engine for a ship, characterized in that: a limit bolt is threadedly assembled on a limit block (8), a locking block is sleeved on the limit bolt, a nut threadedly engaged with the limit bolt is provided below the locking block, a distance sleeve sleeved on the limit bolt is provided between the nut and the nut of the limit bolt, the upper end of the limit bolt extends out of the limit block and faces the throttle adjustment rod (7) to limit the downward position of the throttle adjustment rod, a nut for locking is provided below the locking block, the locking block and the limit bolt are both provided with holes, a steel wire passes through the locking block and the limit bolt hole, and both ends of the steel wire are connected by a lead seal. The holes of the locking block and the limit bolt are two parallel light holes opened at the suspended end of the locking block, and a steel wire hole is opened at the hexagonal head of the end of the limit bolt. The steel wire rope is passed through the light hole on the locking block (1) and the steel wire hole on the limit bolt (4) with the steel wire hole, and locked with a disposable steel wire rope lead seal (5).
[0005] A mechanical locking method for reducing the power of a throttle limit of a marine two-stroke diesel engine is disclosed. The limit block of the throttle mechanism is drilled with a mounting threaded hole matched with a limit bolt. The locking block (1), the nut (2), the distance sleeve (3) and the limit bolt (4) with a wire hole are installed in sequence. The limit bolt thread is assembled on the limit block (8). The limit bolt is sleeved with the locking block. A nut matched with the limit bolt thread is installed below the locking block. A distance sleeve sleeved on the limit bolt is provided between the nut and the hexagonal head of the limit bolt. The upper end of the limit bolt extends out of the limit block and faces the throttle adjustment rod (7) to limit the downward position of the throttle adjustment rod. A nut for locking is installed below the locking block. The locking block and the limit bolt are both provided with holes. A steel wire passes through the locking block and the limit bolt hole. Both ends of the steel wire are connected by a lead seal.
[0006] The specifications and lengths of the distance sleeve and the limit bolt (4) with a wire hole are selected according to the throttle setting value after the diesel engine is derated. The wire rope is passed through the two parallel light holes opened at the suspended end of the locking block (1) and the wire hole opened at the hexagonal head of the limit bolt (4), and the position where the two ends of the lock wire are combined is locked with a disposable wire rope lead seal (5) to prevent the crew from tampering with the throttle limit device or misoperation without authorization, so as to ensure that the diesel engine operates in accordance with the throttle setting value after the power is reduced. When encountering an emergency, it is only necessary to remove the disposable wire rope lead seal (5) and adjust the limit amount of the limit bolt (4) with a wire hole to the limit amount of the initial throttle.
[0007] The invention discloses a throttle limit mechanical locking device and method for reducing power of a two-stroke marine diesel engine. The throttle limit mechanical locking device has a simple structure and is convenient for construction in a narrow engine room space of a ship. In case of an extreme situation, the throttle limit lock can be easily released. During construction, (1) a locking block, (2) a nut, (3) a distance sleeve and (4) a limit bolt with a wire hole are sequentially installed, wherein a mounting threaded hole matching the limit bolt with a wire hole of the component (4) is drilled on the throttle mechanism. The distance sleeve (3) and the limit bolt (4) with a hole for passing the wire are selected according to the throttle setting value after the power of the diesel engine is reduced. After the mechanical locking device is installed, the wire rope is passed through the hole of the locking block (1) and the hole of the limit bolt (4), and is locked with a disposable wire rope lead lock (5) to prevent the crew from tampering with the throttle limit device or misoperating it without authorization, so as to ensure that the diesel engine operates in accordance with the throttle setting value of the reduced power. When an emergency occurs, it is only necessary to remove the disposable wire rope seal (5) and adjust the limit amount of the limit bolt (4) with the wire hole to the limit amount of the initial throttle. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 The present invention is a schematic diagram of the installation of a power reduction throttle limit mechanical locking device for a marine two-stroke diesel engine.
[0009] Figure 2The enlarged schematic diagram of the installation position of the throttle limit mechanical locking device for a two-stroke marine diesel engine of the present invention is shown in FIG. 1-locking block, 2-nut, 3-distance sleeve, 4-limiting bolt with wire hole, 5-disposable wire rope seal, 6-limiting amount, 7-throttle adjustment rod, and 8-limiting block.
[0010] Figure 3 The present invention is a schematic diagram of a front view and a left view of a locking block of a throttle limit mechanical locking device for a two-stroke marine diesel engine with reduced power.
[0011] Figure 4 The present invention is a schematic diagram of a front view and a right view of a disposable steel wire rope lead seal of a power reduction throttle limit mechanical locking device for a marine two-stroke diesel engine of the present invention. Implementation
[0012] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings. As shown in the accompanying drawings, a throttle limit mechanical locking device and method for reducing power of a marine two-stroke diesel engine for mechanically controlling fuel injection are provided. The throttle limit mechanical locking device has a simple structure and is convenient for construction in a narrow cabin space of a ship. In extreme cases, the throttle limit lock can be easily released.
[0013] As shown in the figure, a throttle limit mechanical locking device for a marine two-stroke diesel engine that realizes mechanical fuel injection control and a method for installing and releasing the device are provided. First, a throttle limit mechanical locking device is prepared according to the parameters of the diesel engine throttle device. The throttle limit mechanical locking device includes (1) a locking block, (2) a nut, (3) a distance sleeve, (4) a limit bolt with a wire hole, and (5) a disposable wire rope seal. The specifications and lengths of the distance sleeve (3) and the limit bolt with a wire hole (4) are selected according to the throttle setting value after the diesel engine is derated.
[0014] When installing the throttle limit mechanical locking device for a two-stroke marine diesel engine with reduced power as shown in the figure, (1) a locking block, (2) a nut, (3) a distance sleeve and (4) a limit bolt with a wire hole are installed in sequence. Among them, a mounting threaded hole matching the limit bolt with a wire hole in the part (4) is drilled on the throttle mechanism. This mechanical locking device has a limit bolt (4) threadedly assembled on the limit block (8), the limit bolt sleeve has a locking block (1), a nut (2) threadedly matched with the limit bolt is provided below the locking block, and a distance sleeve (3) sleeved on the limit bolt is provided between the nut and the hexagonal head of the limit bolt, and the upper end of the limit bolt extends out of the limit block and faces the throttle adjustment rod (7), thereby increasing the limited stroke (6) and limiting the downward position of the throttle adjustment rod. The locking block is placed on the limit stopper (8). The locking block and the limit bolt are both provided with holes. A steel wire is passed through the locking block and the limit bolt holes. The two ends of the steel wire are connected with a lead seal. The holes of the locking block and the limit bolt are two parallel light holes opened at the suspended end of the locking block and a steel wire hole opened at the hexagonal head at the end of the limit bolt. The steel wire rope is passed through the light hole on (1) the locking block and the steel wire hole on (4) the limit bolt with a steel wire hole, and is sealed with (5) a disposable steel wire rope lead seal. A mechanical locking method for reducing the power of a throttle limit of a marine two-stroke diesel engine is disclosed. The limit block of the throttle mechanism is drilled with a mounting threaded hole matched with a limit bolt. (1) a locking block, (2) a nut, (3) a distance sleeve and (4) a limit bolt with a wire hole are installed in sequence. The limit bolt thread is assembled in the limit block (8). The limit bolt is sleeved with a locking block. A nut matched with the limit bolt thread is installed below the locking block. A distance sleeve sleeved on the limit bolt is provided between the nut and the hexagonal head of the limit bolt. The upper end of the limit bolt extends out of the limit block and faces the throttle adjustment rod (7) to limit the downward position of the throttle adjustment rod. A nut for locking is installed below the locking block. The locking block and the limit bolt are both provided with holes. A steel wire passes through the locking block and the limit bolt hole. Both ends of the steel wire are connected by a lead seal.
[0015] The specifications and lengths of the distance sleeve and (4) the limit bolt with a wire hole are selected according to the throttle setting value after the diesel engine is derated. The wire rope is passed through the two parallel light holes opened at the suspended end of the (1) locking block and the wire hole opened at the hexagonal head of the limit bolt (4), and the two ends of the wire are locked with (5) a disposable wire rope lead seal to prevent the crew from tampering with the throttle limit device or misoperation without authorization, so as to ensure that the diesel engine operates in accordance with the throttle setting value of the derated power. When encountering an emergency, only the (5) disposable wire rope lead seal needs to be removed and the limit amount of the limit bolt with a wire hole (4) is adjusted to the limit amount of the initial throttle. When the throttle limit mechanical locking device is fully tightened, check whether the limit amount of the limit bolt with a wire hole (4) installed after installation is consistent with the limit amount of the bolt set for the throttle. If not, adjust the length of the distance sleeve (3). When the limit amount of (4) the limit bolt with the wire hole is consistent with the bolt limit amount set for the throttle, pass the wire rope through the light hole on the (1) locking block and the wire hole on the (4) limit bolt with the wire hole, and tighten it with (5) a disposable wire rope lead lock to prevent the crew from tampering with the throttle limit device or misoperation, so as to ensure that the diesel engine operates in accordance with the throttle setting value of the power.
[0016] When an emergency occurs, it is only necessary to remove the disposable wire rope seal (5) and adjust the limit amount of the limit bolt (4) with the wire hole to the limit amount of the initial throttle.
[0017] The throttle limit mechanical locking device and method have a simple structure and are easy to construct in a narrow cabin space of a ship. If an extreme situation occurs, the throttle limit lock can be easily released, and the method is efficient and reliable.
Claims
1. A mechanical locking device for reducing the power of a throttle limiter of a marine two-stroke diesel engine, characterized in that: A limit bolt is threadedly assembled on the limit stopper (8), a locking block is sleeved on the limit bolt, a nut threadedly engaged with the limit bolt is arranged below the locking block, a distance sleeve sleeved on the limit bolt is arranged between the nut and the hexagonal head of the limit bolt, the upper end of the limit bolt extends out of the limit stopper and faces the throttle adjustment rod (7) to limit the downward position of the throttle adjustment rod, a nut for locking is arranged below the locking block, the locking block and the limit bolt are both provided with holes, a steel wire passes through the locking block and the limit bolt hole, and both ends of the steel wire are combined and connected by a lead seal.
2. The throttle limit mechanical locking device for a marine two-stroke diesel engine with reduced power as claimed in claim 1, characterized in that: The holes of the locking block and the limit bolt are two parallel light holes opened at the suspended end of the locking block and a wire hole opened at the hexagonal head at the end of the limit bolt.
3. The throttle limit mechanical locking device for a two-stroke marine diesel engine according to claim 1, characterized in that: Pass the wire rope through the smooth hole on the locking block (1) and the wire hole on the limit bolt with wire hole (4), and lock it with a disposable wire rope lead seal (5).
4. A mechanical locking method for reducing the power of a throttle limit of a marine two-stroke diesel engine, wherein a limit stopper of a throttle mechanism is drilled with a mounting threaded hole matched with a limit bolt, and (1) a locking block, (2) a nut, (3) a distance sleeve and (4) a limit bolt with a wire hole are installed in sequence, the limit bolt thread is assembled in the limit stopper (8), the limit bolt sleeve is provided with a locking block, a nut matched with the limit bolt thread is provided below the locking block, a distance sleeve is provided between the nut and the hexagonal head of the limit bolt and is sleeved on the limit bolt, the upper end of the limit bolt extends out of the limit stopper and faces the throttle adjustment rod (7) to limit the downward position of the throttle adjustment rod, a nut for locking is provided below the locking block, the locking block and the limit bolt are both provided with holes, a steel wire passes through the locking block and the limit bolt hole, and both ends of the steel wire are combined and connected with a lead seal.
5. The method for mechanically locking the throttle limit of a marine two-stroke diesel engine for power reduction according to claim 1, characterized in that: The specifications and lengths of the spacer sleeve and (4) the limit bolt with the wire hole are selected according to the throttle setting value after the diesel engine power is reduced.
6. The method for mechanically locking the throttle limit of a marine two-stroke diesel engine for power reduction according to claim 1, characterized in that: Pass the wire rope through (1) the two parallel light holes opened at the suspended end of the locking block and the wire hole opened at the hexagonal head of the limit bolt (4), and use (5) a disposable wire rope lead lock to lock the joint position of the two ends of the wire to prevent the crew from tampering with the throttle limit device or misoperation without authorization, so as to ensure that the diesel engine operates in accordance with the throttle setting value of the reduced power.
7. The method for mechanically locking the throttle limit of a marine two-stroke diesel engine for power reduction according to claim 1, characterized in that: When an emergency occurs, it is only necessary to remove (5) the disposable wire rope seal and adjust the limit amount of (4) the limit bolt with the wire hole to the limit amount of the initial throttle.