Marine pumps are widely used in ships, and they are an important part of the ship’s power plant system and other related pump systems.

A ship is a kind of engineering building on water, and it is a “town” that can float on water. Today’s ship is not only a common place for people to carry out water activities, one of the important tools of transportation, but also an important military equipment and water engineering facility. Ship is a collective noun, which contains a lot of content. There are many types of ships, which are widely used in national defense, transportation, transportation, production, scientific research and trade. As far as size is concerned, the differences between the various ships are incomparable. The sampans used on river harbors are propelled by oars or sculls, and there are as few as one person on board; the ships sailing in the inland ocean have a displacement of hundreds of thousands of tons, and except for a few management personnel, almost all devices are fully automated. In terms of usage, there are countless types of ships: for transporting troops and fighting, for carrying passengers and cargo, for scientific investigation, for fishing and catching shrimp, for dredging and cable laying, for drilling resources and salvage and rescue, etc. Moreover, in each major category of ships, it can be subdivided into many types. Taking military ships as an example, it can be divided into two categories: combat ships and auxiliary ships, and combat ships can also be divided into aircraft carriers, cruisers, destroyers, frigates, military speedboats, submarine hunters, landing craft and submarines. If it is classified according to its power, armament and mission, more detailed branches can be obtained. Whenever you walk on the trails in the harbor or travel in the boats on the rivers, it is not difficult to see all kinds of ships shuttling on the water or mooring at the pier, just like the pedestrians in the downtown area, which dazzles you and is countless.

However, among all kinds of ships, except for small and hand-operated ships such as sampans and cement ships, most of the remaining ships have a common feature, that is, in addition to the hull and superstructure , in order to ensure the use performance and navigation performance of the ship, a large number of mechanical equipment and electrical equipment are required to meet various needs. In marine machinery and equipment, pump is a kind of mechanical equipment with large quantity, various varieties and important functions. Usually, we refer to the pumps used on ships and the port pumps serving ships as marine pumps. In order to ensure the normal navigation or mooring of the ship, meet the daily needs of the crew and passengers, ensure the stability, anti-sinkability, habitability and vitality of the ship, and complete certain special missions, it is necessary to have a certain number of function marine pump. Therefore, marine pumps are one of the essential equipment in marine machinery

Marine pumps are widely used in ships, and they are an important part of the ship’s power plant system and other related pump systems. On ships, it is often necessary to transport water and oil, as well as various other liquids, to fulfill certain missions. For example, the sewage should be discharged overboard frequently to avoid water accumulation in the cabin; fuel oil should be continuously delivered to the main engine to ensure its continuous operation; water should be continuously supplied to the boiler to ensure that it can work safely and effectively; and The supply of lubricating oil, the circulation of cooling water, the adjustment of ballast water and the supply of drinking water and sanitation water are all essential. Due to the different characteristics of the ship and the displacement, the number of marine pumps installed on the ship is also different. If a pump is used, only one pump can be prepared, and there can be dozens of pumps. For example, on a freighter with a water volume of 10,000 and a main steam turbine power of 8,500HP, onlymarine centrifugal pumps are installed 23 sets, with a minimum flow rate of 1.15m³/h and a maximum flow rate of 3,000m3/h; on a diesel engine freighter with a displacement of 27,000t, The installed centrifugal pumps are 16 and so on.

According to incomplete statistics, among the various auxiliary machinery and equipment of ships, the number of marine pumps of various types and uses accounts for about 20-30% of the total amount of machinery and equipment. Marine pumps, pipelines and their accessories form a special pipeline system, which is used to serve the power plant of the ship, the life of the crew and passengers, the safe navigation and sanitation of the ship, and various other special devices.