When the ship is sailing, the stern bearing and sealing device are easy to heat, and must be lubricated and cooled. Although there are many types of stern tube devices, there are only two kinds of lubricants: water and oil. Different lubricants have different lubrication and cooling methods, which are described below....

Dock inspection is a very important ship inspection, that is, dock repair inspection. Dock inspection generally refers to the relevant inspection of the ship in the dry dock, including the external inspection of the ship bottom and the classification dock inspection. After obtaining the approval of the classification society and the flag state, the external inspection of the ship bottom and the dock inspection of the classification can also be carried out when the ship is floating (underwater inspection)....

The stern shaft seal of the ship may leak due to various reasons. The sea water enters the seal chamber, causing the oil in the rear seal oil tank to be emulsified (see Figure 1). In serious cases, the oil leaks out to the sea, causing the port authorities to detain or fine, or the sea water leaks inward, causing the stern tube oil to be emulsified, the lubricating oil film to fail, causing serious accidents such as high temperature or even burning of the stern bearing, which bring serious potential safety hazards to the ship. ...

1. Working principle: This type of stern shaft sealing rubber ring is used to generate force on the working surface by the pressure of liquid (sea water or lubricating oil) to compress the rubber ring lip on the shaft sleeve surface to achieve the purpose of sealing. There are four oil seals in this unit, and and NO.2 are working towards the propeller to seal the water; The No. 3 channel and No. 3S channel work towards the main engine to seal oil. When the new installation is just put into use...