Marine News

  What Is A Water Pump? The water pump  is a machine that transmits the mechanical energy or other external energy of the prime mover to the liquid, so that the liquid energy is increased, mainly used to transport liquids including water, oil, acid lye, emulsion, suspension emulsion and liquid metal. It can also transport liquids, gas mixtures and liquids containing suspended solids. The technical parameters of pump performance are flow, suction, head, shaft power, water power, efficiency and so on. According to different working principles,  water pumps  can be divided into positive displacement pumps and vane pumps. Positive displacement pumps use changes in their studio volume to transfer energy, while vane pumps use the interaction of rotary blades with water to transfer energy. Specifically,  centrifugal pumps , axial flow pumps and mixed flow pumps belong to  vane pump  types. Pumps are widely used in various ships, such as the following ships: C...

  What Is An Emergency Fire Pump? ​ Emergency fire pump  is an emergency fire pump with independent power source, which can start quickly and has self-priming ability. It is mainly used to fire the engine room through the emergency fire pump when the main fire pump cannot be started when the engine room area is on fire. Fire pump  has a variety of classification methods, according to the use can be divided into spray pump, hydrant pump, pressure pump, etc., these fire pumps from the structure is much the same, but according to the actual use of different head and flow. Spray pump:  It is a fixed device in the fire sprinkler system, which is widely used at present, with low price, long life and high fire extinguishing efficiency. The fire sprinkler system can also work synchronously with other fire fighting facilities, which can effectively control and extinguish the initial fire. Hydrant pump:  hydrant pump is divided into vertical single-stage, vertical multi-s...

  What Is A Piston Pump? A  piston pump  is a pump that transmits liquid through the reciprocating motion of the piston.  The piston pump  is mainly composed of a piston, a cylinder, a pump body, and an inlet and outlet water valve. The working principle of the  piston pump  is: when the piston moves backward, the volume in the pump chamber increases, the pressure decreases, and the liquid is sucked into the pump chamber; When the piston moves forward, the volume in the pump chamber decreases, the pressure increases, and the liquid is expelled from the pump chamber. Piston pumps have the following features: Flow and pressure stability, suitable for high pressure, large flow, high head occasions. Suitable for conveying liquids of various viscosity, temperature, corrosion and abrasive properties. High efficiency, long life and high reliability. Simple structure and easy maintenance. In the Marine field, piston pumps are mainly used to transport fuel oil,...

  What Is A Screw Pump? A  screw pump  is a positive displacement pump that transports or compresses fluid through the rotating motion of a screw. The flow rate and pressure of the screw pump are relatively stable, which is suitable for transporting liquids of various viscosities, especially for liquids with high viscosity, particulate matter and strong corrosion. The main working parts of the  screw pump  are the screw and the pump shell, the screw is usually rotated in the pump shell, so that the fluid is sucked, compressed and discharged. The working principle is that when the screw rotates, the space between the screw and the pump housing gradually decreases, drawing the liquid from the inlet and pushing it to the outlet. Because the space between the screw and the pump housing is closed, the liquid cannot leak out and can only be pushed forward with the rotation of the screw. With the rotation of the screw, the liquid is continuously inhaled and discharged,...

  What Is Axial Flow Pump? Axial flow pump  is a pump that uses the rotation of the impeller to generate the kinetic energy of the fluid, which is mainly used for transporting fluids. It is characterized by large flow, low head, suitable for low head, large flow occasions. The impeller design of the  axial flow pump  is special, and the flow and head can be changed by adjusting the Angle of the blade. Axial flow pumps have higher efficiency, but are limited by the adjustment range of the head, and are generally only suitable for specific head and flow ranges. The conveying medium of the axial flow pump is generally water, liquid, etc., and can also be used for gas transportation, but special sealing and lubrication methods are required. The working principle of the  axial flow pump  is mainly to use the high-speed rotation of the impeller to provide the power of water flow. Specifically, the impeller structure of the axial flow pump is special, so that the ...

  What Is Multi-Stage Pump? Multistage pump  is a kind of  centrifugal pump , which is characterized by high head, low flow, compact structure and reliable use. The basic structure of  multistage pump  includes water inlet section, water outlet section, middle section, tail cover, impeller, pump body, pump shaft, bearing, sealing ring, stuffing box and other components. The multistage pump is combined by a tie rod, and each impeller can obtain a higher head. The working principle of the  multistage pump  is to use the principle of centrifugal force to transfer energy to the liquid through the high-speed rotation of the impeller, so that the liquid can obtain higher pressure and flow rate. The impeller of a multistage pump is usually backbent to improve efficiency. As the impeller rotates, the liquid is sucked in and flows in the direction of the blade of the impeller, and then thrown out. At the exit of the impeller, the pressure and velocity of the li...

  What Is Pneumatic Pump? Pneumatic pump  is a type of pump that uses compressed air as the power source. The pneumatic pump is an adaptable type of pump that can be used in many different situations. The working principle of the  pneumatic pump  is to use the power of compressed air to transport the liquid from the low pressure area to the high pressure area. The pneumatic pump usually consists of a pressure regulator, an air source, a pneumatic piston and a liquid compression chamber. Compared with other pump types, pneumatic pumps have the following advantages: The pneumatic pump requires no power supply, only the air source can be driven, and the installation and maintenance are relatively simple. Pneumatic pump no spark, no arc, no electromagnetic interference, no grounding, safe and reliable. Pneumatic pumps can handle different liquid delivery needs, such as viscous and granular liquids. Pneumatic pump can work in wet or fire environment, high safety. The pneu...

  What Is Process Pump? A  process pump  is a common industrial pump that is mainly used to transport fluid media, such as liquids or gases. The process pump has the characteristics of high efficiency, reliability and safety, and can provide continuous and stable fluid transportation to ensure the smooth progress of the production process. There are many types of  process pumps , which can be divided into different types according to different classification standards. For example, according to the different transmission medium, the  process pump  can be divided into liquid process pump and gas process pump; According to the different throughput, the  process pump  can be divided into large flow flow pump and small flow flow pump; According to the different working pressure, the process pump can be divided into high pressure process pump and low pressure process pump. The flow pump is mainly composed of pump body, impeller, pump cover, shaft, etc....

  What Is Magnetic Pump? Magnetic pump  is a kind of pump driven by magnetic force, which is mainly composed of several parts such as pump head, magnetic drive, motor and base. The magnetic drive of the  magnetic pump  is composed of an external magnetic rotor, an internal magnetic rotor and a non-magnetic isolation sleeve. When the motor drives the external magnetic rotor to rotate through the coupling, the magnetic field can penetrate the air gap and non-magnetic substances, and drive the inner magnetic rotor connected with the impeller to rotate synchronously to achieve power transmission. Because the  magnetic pump  has the advantages of no leakage, no pollution, no noise, etc. In oil tankers and  chemical vessels , due to the need to transport highly polluting liquids, in order to avoid leakage and contamination, magnetic pumps are often used to replace traditional mechanically sealed pumps. In addition, on some special purpose vessels, such as of...