Marine News

  What are the classifications of stern tubes? According to different classification standards,  Marine stern tubes  can be divided into different types. ​ According to the classification of materials,  Marine stern tubes  can be divided into cast steel stern tubes, seamless steel tube stern tubes, copper and copper alloy tube stern tubes, stainless steel tube stern tubes and so on. According to the classification of structure,  Marine stern tube  can be divided into integral stern tube and assembled stern tube. Integral stern tubes are cast or welded into one piece, such as bearings and seals, and then installed at the rear of the hull. This kind of stern tube has simple structure and convenient installation, but it is difficult to maintain and replace. The assembled stern tube is to separate the bearing and sealing device, etc., and install and adjust it on site, so that it can adapt to different ship tail structure and size requirements, while convenient maintenance and replacement.

  What are the parts of the stern tube? ​ Stern tube  is a section of pipe fixed at the stern of a ship to allow the shaft to pass through and provided with a seal and support device. The components of the stern tube are generally divided into  bearings , sealing devices, cooling water systems,  lubricating oil systems , exhaust pipes and sewage outlets. Bearings:  Bearings are the core components of the stern tube, used to support and protect the shafting, and to withstand axial and radial loads. According to different ship types and design requirements, bearings can be used in different forms such as plain bearings, rolling bearings and hydraulic bearings. Sealing device:  Sealing device is an important part to prevent the leakage of lubricating oil and other media. According to the different sealing medium and pressure, the sealing device can be divided into oil lubricated rubber ring seal and air lubricated rubber ring seal. Cooling water system:  In order to prevent bearings and o

  HSM Water Lubricated Stern Shaft Sealing Device Specific Parameters HSM water lubricated stern shaft sealing device  is one of the important parts on the ship, and its main function is to over-seal and prevent oil and water from entering the cabin. The basic parameters of the HSM water lubricated  stern shaft sealing device  are: Tail shaft basic diameter range: 50-800mm Outer diameter of shaft bushing :70-850mm Linear speed of stern bushing: 7/S Working pressure of lubricating water: 0.2mpa Rated pressure of air bag: 0.2-0.6mpa Average leakage: 0.8l /h     unit ： mm          Note: HSM is used when axial series action is less than 1mm     specifca     tions     size 70 90 110 130 150 170 190 210 230 250 270 290 310 330 350 370 390 410 430 450 A 70 90 95 130 150 170 190 210 230 250 270 290 310 330 350 370 390 410 430 450 Wmax 55 75 285 115 135 155 175 195 215 230 250 270 290 310 325 345 365 385 405 425 B 250 265 260 300 330 345 365 420 440 460 480 530 550 580 590 620 640 670 690 710 C