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Compression ratio adjustment method for diesel main engine of ship propulsion system

A propulsion system and adjustment method technology, applied in the direction of motor-driven engines, etc., can solve the problems of propulsion system optimization, fuel-saving effect is not obvious, etc., and achieve the effect of low cost

Active Publication Date: 2015-01-07
QUANZHOU AN SHENG SHIPPING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this modification did not involve the diesel main engine, nor did it optimize the propulsion system, so the fuel saving effect is not obvious

Method used

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  • Compression ratio adjustment method for diesel main engine of ship propulsion system
  • Compression ratio adjustment method for diesel main engine of ship propulsion system
  • Compression ratio adjustment method for diesel main engine of ship propulsion system

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Embodiment Construction

[0024] In order to further explain the technical solution of the present invention, the present invention will be described in detail below through specific examples.

[0025] The ship propulsion system mainly includes a diesel main engine, shafting and propeller. Since the diesel main engine and the propeller are one of the main factors affecting the ship's operating speed, the present invention optimizes the diesel main engine and the propeller on the ship, so that the diesel main engine and the propeller of the adjusted parameters The redesigned new propeller achieves the purpose of high-efficiency operation at low speeds, and can also improve efficiency and greatly reduce fuel consumption at a lower cost. Because propeller and supercharger need to be redesigned and selected in the present invention, for the convenience of description, it is called the original propeller and the original supercharger before the transformation of the ship, and the new propeller and new superc...

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Abstract

The invention discloses a compression ratio adjustment method for a diesel main engine of a ship propulsion system. The thickness of an adjusting washer between a piston rod of a cylinder and a cross head of the diesel main engine is adjusted, and the compression ratio of the diesel main engine can be changed. According to the compression ratio adjustment method for the diesel main engine of the ship propulsion system, the thickness of the adjusting washer between the piston rod and the cross head is changed, related movement traces are not changed or affected as compared with change of the washer at a large head end of a connecting rod, complicated movement traces do not need to be checked, the compression ratio of the diesel main engine can be changed at low cost and matched with a supercharger of a ship, the combustion condition of diesel is improved, and unit oil consumption of the diesel main engine is reduced, so that energy is saved and emission is reduced.

Description

technical field [0001] The invention relates to a modification method of a ship propulsion system, in particular to a diesel engine engine and a compression ratio adjustment method of the propulsion system. Background technique [0002] The existing ship propulsion system mainly includes diesel engine, shafting and propeller. In order to improve the turnover rate of the current ocean-going container ships, the rated operating point is basically selected at a speed of 16 knots or more. However, such a speed is not necessary for domestic trade container transportation, and at this time the entire propulsion system only works below 50% of the rated working condition. According to the working principle of the diesel engine, this working area is an area where the fuel consumption rate of the diesel main engine is relatively high. In addition, the propeller is far away from the designed working point, and its working efficiency is relatively low. [0003] Since most of the exist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63H21/14
Inventor 周鸿辉李炳红
Owner QUANZHOU AN SHENG SHIPPING
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