Diesel engine and seawater pump thereof

Abstract

The invention discloses a diesel engine seawater pump which comprises a pump body with a water inlet cavity and a water outlet cavity, and a bypass valve is arranged between the water inlet cavity and the water outlet cavity. A water inlet of the bypass valve is communicated with the water outlet cavity, and a water outlet of the bypass valve is communicated with the water inlet cavity. The bypass valve comprises a valve body, a valve core and a spring, wherein the valve core and the spring are arranged in a cavity of the valve body, the water inlet is located at one end of the valve body, the water outlet is located on the side wall of the valve body, and the valve core shuts off the water inlet of the valve body under the support of the spring. The seawater pump can always supply sufficient cooling water when a diesel engine operates at various rotating speeds, so as to maintain normal water pressure and ensure the normal cooling of the diesel engine. The invention also discloses a diesel engine with the seawater pump.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a seawater pump for a marine diesel engine cooling system. The invention also relates to a diesel engine provided with said seawater pump. Background technique [0002] At present, diesel engines have been widely used in various industries due to their low fuel consumption, high thermal efficiency, wide power range, fast and convenient starting, safe and reliable operation, convenient maintenance, and long service life. [0003] In a diesel engine, about 45-50% of the heat energy released by fuel combustion is converted into useful work, and the other 25-35% is dissipated from components such as pistons and cylinders. In order to ensure that the temperature of the heated components will not be too high and affect the work, cooling must be provided. liquid. [0004] Cooling system is an important system of diesel engine. Its cooling methods are mainly divided into two categories...

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Problems solved by technology

But in this way, when the diesel engine is running at high speed, it is easy to cause the water pressure of the seawater pump to be too high, which not only consumes the power of the diesel engine inactively, but also causes the components of the circulating water circuit to fail due to the high water pressure.

[0007] In addition, changing the speed ratio of the pulley according to the running speed of the diesel engine requires replacing the corresponding pulley of the water pump, which is not only inconvenient to operate, but also causes unnecessary trouble and damage to parts

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