Matching structure mode of main engine lubricating oil pump cabin head arrangement and lubricating oil circulation cabin inclined bottom

Abstract

The invention discloses a main engine lubricating oil pump cabin head arrangement and lubricating oil circulation cabin inclined bottom matching structure mode which comprises a ship engine room, a main engine, a shaft type shaft generator, a main engine lubricating oil pump and a main engine lubricating oil circulation cabin are arranged in the ship engine room, the shaft type shaft generator is located at the rear end of the main engine, one end of the shaft type shaft generator is connected with the main engine through a short shaft, and the other end of the shaft type shaft generator is connected with the inclined bottom of the lubricating oil circulation cabin. The other end is connected with the intermediate shaft through a short shaft; the main engine lubricating oil circulating cabin is positioned below the main engine; the main engine lubricating oil pump is arranged at the front ends of the main engine and the main engine lubricating oil circulating cabin; the bottom of the main engine lubricating oil circulating bin is designed to incline towards the head, namely, a height difference exists between the front end and the rear end. The limited space at the rear end of the main engine can be reserved for the journal sticking type shaft engine, the arrangement of a lubricating oil pump of the main engine which is necessary equipment is also realized, and meanwhile, the preferred requirements of customers on the journal sticking type shaft engine are also met.

Description

Technical Field

[0001] The present invention relates to the technical field of ships, and particularly relates to a matching structural mode of arranging the main engine lubricating oil pump at the bow of the engine room and the inclined bottom of the lubricating oil circulating tank. Background Art

[0002] In the case of a ship's low-speed engine with a shaft generator, the conventional ship type design arranges the shaft generator (7) at the free end (front end) of the main engine (2), and the main engine lubricating oil pump (4) is conventionally arranged at the tail of the lubricating oil circulating tank (5) and the main engine (see Figure 2 ). There is no problem with this arrangement itself. However, for customers who prefer to select a shaft-mounted shaft generator, this arrangement will have corresponding disadvantages. Since the size of the shaft-mounted shaft generator is very large and it must be placed on the intermediate shaft at the rear end (flywheel end) of the main engine, this will result in insufficient space to arrange the main engine lubricating oil pump due to the shaft generator occupying the originally narrow space at the rear of the main engine. In this case, without seeking innovation and change, the customer's requirements cannot be met. Summary of the Invention

[0003] The purpose of the present invention is to provide a matching structural mode of arranging the main engine lubricating oil pump at the bow of the engine room and the inclined bottom of the lubricating oil circulating tank in view of the defects and deficiencies of the prior art.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: a matching structural mode of arranging the main engine lubricating oil pump at the bow of the engine room and the inclined bottom of the lubricating oil circulating tank, including a ship engine room, in which a main engine, a shaft-mounted shaft generator, a main engine lubricating oil pump and a main engine lubricating oil circulating tank are arranged. The innovation lies in that: the shaft-mounted shaft generator is located at the rear end of the main engine, and one end is connected to the main engine through a short shaft, and the other end is connected to the intermediate shaft through a short shaft; the main engine lubricating oil circulating tank is located below the main engine, the main engine lubricating oil pump is arranged at the front end of the main engine and the main engine lubricating oil circulating tank, and the suction port of the main engine lubricating oil pump extends to the bottom of the main engine lubricating oil circulating tank; the bottom of the main engine lubricating oil circulating tank is designed to be inclined towards the bow, that is, there is a height difference between the front end and the rear end.

[0005] Further, the height difference is about 200 mm, that is, the position of the main engine lubricating oil circulating tank at the bow is about 200 mm deeper than the position at the tail.

[0006] After adopting the above structure, the beneficial effects of the present invention are as follows:

[0007] The present invention can not only leave the limited space at the rear end of the main engine for the shaft-mounted shaft generator, but also realize the arrangement of the necessary equipment of the main engine lubricating oil pump, and at the same time meet the customer's preference for the shaft-mounted shaft generator. Brief Description of the Drawings

[0008] Figure 1Structural schematic diagram of the present invention;

[0009] Figure 2 It is the structural schematic diagram in the background art.

[0010] Explanation of reference numerals:

[0011] 1 Ship engine room, 2 Main engine, 3 Shaft-driven shaft generator, 4 Main engine lubricating oil pump, 5 Main engine lubricating oil circulation tank, 6 Intermediate shaft, 7 Shaft generator. Specific embodiments

[0012] The present invention will be further described below with reference to the accompanying drawings.

[0013] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0014] Refer to Figure 1 , a matching structural mode of the forward arrangement of the main engine lubricating oil pump cabin and the inclined bottom of the lubricating oil circulation tank, including the ship engine room 1, in which a main engine 2, a shaft-driven shaft generator 3, a main engine lubricating oil pump 4 and a main engine lubricating oil circulation tank 5 are arranged. The shaft-driven shaft generator 3 is located at the rear end of the main engine 2, and one end is connected to the main engine through a short shaft, and the other end is connected to the intermediate shaft 6 through a short shaft; the main engine lubricating oil circulation tank 5 is located below the main engine 2, the main engine lubricating oil pump 4 is arranged at the front end of the main engine 2 and the main engine lubricating oil circulation tank 5, and the suction port of the main engine lubricating oil pump 4 extends to the bottom of the main engine lubricating oil circulation tank 5; the bottom of the main engine lubricating oil circulation tank 5 is designed to be inclined forward, that is, there is a height difference between the front end and the rear end ( Figure 1 A in). Specifically, arranging the main engine lubricating oil pump 4 at the front end of the main engine lubricating oil circulation tank 5 and the main engine 2 can not only leave the limited space at the rear end of the main engine for the shaft-driven shaft generator 3, but also realize the arrangement of the necessary equipment of the main engine lubricating oil pump 4, and at the same time meet the customer's preference for the shaft-driven shaft generator 3; the height difference can ensure that the liquid level at the suction port of the main engine lubricating oil pump is always above the minimum required liquid level when the ship is in an inclined state or the maximum allowable sway state specified by the regulations.

[0015] In the embodiment, the height difference ( Figure 1 A in) is about 200 mm, that is, the position of the main engine lubricating oil circulation tank 5 at the bow is about 200 mm deeper than the position at the stern.

[0016] In summary, the main engine lubricating oil pump 4 of the present invention is arranged at the front end of the main engine lubricating oil circulation tank 5 and the main engine 2. This not only enables the limited space at the rear end of the main engine to be left for the shaft-driven generator 3, but also realizes the arrangement of the necessary equipment of the main engine lubricating oil pump 4, and at the same time meets the customer's preference for the shaft-driven generator 3.

[0017] However, if the main engine lubricating oil pump is simply arranged at the front end of the main engine without comprehensively considering the floating state of the ship and the operating conditions of the main engine and the pump under extreme conditions, other problems and risks will also be caused. As is well known, a ship is generally in a level floating or stern trim state during navigation or floating. If the lubricating oil pump is arranged at the head of the lubricating oil circulation tank and at the same time accompanied by harsh operating conditions, there may be an obstacle to the suction of the lubricating oil pump or the suction port of the circulating pump may be exposed above the liquid level, resulting in a serious situation of air suction. Therefore, based on this problem, while considering designing the bottom of the lubricating oil circulation tank to be inclined forward, according to the length and volume of the lubricating oil circulation tank, a height difference of about 200 mm is designed, that is, the position of the main engine lubricating oil circulation tank at the head is about 200 mm deeper than the position at the tail. In this way, even when the ship is tilted or in the maximum sway state allowed by the regulations, it can ensure that the liquid level at the suction port of the main engine lubricating oil pump is always above the minimum required liquid level. Through such design and layout, the above-mentioned problems are perfectly solved, and the rationalization of the arrangement and function is achieved.

[0018] As described above, it is only used to illustrate the technical solution of the present invention and not to limit it. Any other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, shall be covered by the scope of the claims of the present invention.

Claims

1. A matching structural mode of the forward arrangement of the main engine lubricating oil pump cabin and the inclined bottom of the lubricating oil circulation tank, including a ship engine room, in which a main engine, a shaft generator with a reporting shaft, a main engine lubricating oil pump and a main engine lubricating oil circulation tank are arranged, and it is characterized in that: The said shaft-driven generator is located at the rear end of the main engine, and one end is connected to the main engine through a short shaft, and the other end is connected to the intermediate shaft through a short shaft; the main engine lubricating oil circulating tank is located below the main engine, the main engine lubricating oil pump is arranged at the front end of the main engine and the main engine lubricating oil circulating tank, and the suction port of the main engine lubricating oil pump extends to the bottom of the main engine lubricating oil circulating tank; The bottom of the main engine lubricating oil circulating tank is designed to slope forward, that is, there is a height difference between the front end and the rear end.

2. The matching structural mode of the forward arrangement of the main engine lubricating oil pump compartment and the inclined bottom of the lubricating oil sump tank according to claim 1, characterized in that: The said height difference is about 200 mm, that is, the position of the main engine lubricating oil circulating tank at the bow is about 200 mm deeper than the position at the stern.

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