Marine News

  How Many Are The Classifications Of Marine Valves Marine valves  are Marine equipment used to control the pressure, flow and flow direction of the fluid in the ship pipeline to meet the environmental conditions of the ship. Valve is a fluid pipeline control device, its basic function is to connect or cut off the flow of the pipeline medium, change the flow of the medium, change the direction of the flow of the medium, adjust the pressure and flow of the medium, and protect the normal operation of the pipeline equipment. There are many kinds of classification of  Marine valves , which can generally be classified according to some characteristics Classification by use:  Marine valves can be divided into cut-off valves, check valves, safety valves, regulating valves and diverter valves according to their use. These valves are used to connect or cut off the medium in the pipeline, prevent the reverse flow of the medium, ensure that the pressure in the pipeline or devic...

  What Is The Purpose And Classification Of The  Water Pump  And The Scope Of Application? Marine water pump  is mainly used for ship water supply, drainage, ballast, washing, bilge discharge, fire fighting and other purposes. Due to the special environment and requirements of ship navigation, Marine pumps need to meet the requirements of corrosion resistance, high efficiency, low energy consumption, high reliability and so on to ensure the safety and normal operation of the ship. According to different classification standards, Marine pumps also have different classification methods. According to the use can be divided into supply pump,  ballast pump,  fire pump , bilge pump , etc. According to the structure can be divided into  single-stage pump,  multi-stage pump , centrifugal pump ,  gear pump , etc. According to the conveying medium can be divided into clean  water pump,  oil pump  and so on. The scope of application varie...

  What are the classifications of  Marine gearboxes ? There are many types of gearboxes, which can be adapted to different application scenarios. The following are some commonly used gearbox classifications. Direct rigid transmission: This transmission uses a direct rigid connection to connect the output shaft of the engine to the input shaft of the propeller. Its structure is simple and high efficiency, but it can not achieve the adjustment of speed, and can only transmit power in a fixed proportion. Yaw transmission: Yaw transmission adopts offset gear transmission, which can adjust the speed by changing the gear clearance. It is suitable for ships that need to adjust the propulsion force under different working conditions, such as tugs, barges, etc. Dual channel transmission: Dual-channel transmissions have two independent transmission channels and are generally used in dual-propeller drive systems. By controlling the speed difference between the two channels, the ship can ...

  How do Marine gearboxes work? Marine gearbox  is an important part of Marine power system. Usually the Marine gearbox is mounted on the drive end of the engine, between the engine and the propeller shaft. The engine is connected to the gearbox through  flanges , which are connected to the drive shaft. This kind of machinery is generally composed of gears,  wheels , clutches, pressure plates, input couplings, output couplings, etc. The main function is to transfer the power generated by the engine to the thrusters, thereby driving the ship forward. The working process of Marine gearbox mainly includes the following steps: Power input:  The Marine gearbox transmits the power generated by the engine to the input shaft of the gearbox through transmission devices such as couplings. Gear change:  Inside the gearbox, through the engagement and transformation of different gears, the input power is accelerated or decelerated to meet the needs of the propeller. Out...

  The Role Of Marine Gearboxes ​ Marine gearbox  plays a vital role in the Marine propulsion system, the general Marine gearbox by gear,  bearings , boxes, seals, lubrication system, cooling system, fasteners, etc., its main functions are as follows: Deceleration :  The Marine gearbox transmits the power of the engine to the propeller through the gear train and realizes the function of deceleration at the same time. It matches the speed between the low speed engine and the high speed propeller, so that the propeller can run at the appropriate speed. Reverse:   Some Marine gearboxes have a reverse function, that is, they can realize the reverse operation of the paddle. This allows the thrusters to turn in different directions, providing two-way adjustability of propulsion. Clutch:  In some cases, the Marine gearbox is equipped with a clutch to achieve clutch or engagement between the engine and the propeller when needed. The use of the clutch can control the...

  10 steps for commissioning a Marine diesel generator set Marine diesel generator set  is a kind of power generation equipment with fast start, easy operation and maintenance, less investment and strong adaptability to the environment, and it is also an indispensable and important existence in Marine spare parts. It is mainly used for the power supply of various main power supplies and emergency power supplies, and can also be applied to the power supply of electric propulsion systems. Therefore, the commissioning of the generator set before work is also essential. 1. Add water First, close the drain valve, add clean drinking water or pure water to the tank mouth, and close the tank cover. 2. Add oil During the refueling process, observe the ruler until the oil is added to the position of the ruler, cover the oil cap, do not add too much oil, too much oil will cause the phenomenon of oil discharge and oil burning. 3. Distinguish between return oil and return oil In order to e...

  What Are The Differences Between Dry Cargo Ships And Chemical Carriers? There are clear differences in design and use between  dry cargo  ships and  Chemical Carriers . Dry cargo  ships are ships designed to transport various dry goods, such as wood, ore, grain, etc. The hold of a  dry cargo ship  is usually closed to keep the cargo dry and clean. Because  dry cargo  ships need to carry a large amount of cargo, their cargo holds are usually large and designed to be strong and stable enough to withstand the weight and pressure of the cargo. In addition, dry cargo ships usually have a higher stowage capacity in order to carry more cargo. Chemical tanker is a ship specially designed for the transport of various chemicals. Because chemicals are often flammable, explosive, toxic or corrosive,  Chemical Carriers  need to be designed and built with special consideration for safety and environmental protection. The cargo holds of  Ch...

  This paper introduces the cooling system of  Caterpillar Marine diesel engine . 1. SCAC cooling system Separate Circuit After-Cooler: C18, C32, 3500 series, C280 all adopt this system. The following is the schematic diagram of the C32 with heat exchanger cooling system, which is often used in the seawater or central cooling system of the main propulsion engine or the main generator set. A separate loop aftercooler (SCAC), that is, a water source other than liner water (JW), provides cooling water. It is used to provide cooler water, further reducing the intake manifold temperature. The following is the schematic diagram of SCAC outboard cooler cooling system, which is commonly used in the outboard sea water cooling system of the main propulsion engine and the main generator set. The following is the schematic diagram of the SCAC  heat exchanger  cooler cooling system, which is commonly used in the heat exchanger seawater cooling system of the main propulsion engine...

  In   Marine Engine , The Difference And Application Of Low Speed Machine And High Speed Machine? Low speed engines and high speed engines are two common engine classifications in Marine engines, and there are significant differences in their design and application. As an indispensable power source on board, Marine engine is one of the most important parts. Low-speed machines  usually use  diesel engines  as a power source, the speed range is 300-600 RPM, usually directly drive the propeller, with a larger steel material to support the weight of the rotor, so the low-speed machine is larger and heavier than the high-speed machine, but the power is greater. The design of the low-speed machine is more mature, more stable and reliable, and the low-speed machine is more energy efficient than the high-speed machine. Due to the higher efficiency and reliability of low-speed machines, they are usually used in situations that require long continuous operation and high ...