© 2022 Songjie Forging Co., Ltd | Website Maker | Michael SEO Studio
EMAIL: sales@songjieforging.com
PHONE: +86 18587547493
What Is Ship Shaft
Ship shaft, as the name suggests, are shafts used on ships, also known as propeller shaft. Different types of ship shaft play different roles on ships. For example, a ship propeller shaft is a low-speed marine propulsion and steering system for ships. The ship shaft is the most important part of the marine engine, the center of the propeller propulsion system, and an important part of pushing the ship forward. Ship shafts are usually cylindrical in shape, and sometimes raised or indented designs are added to the shaft to enhance its load-bearing capacity. Some ship shafts can also use special-shaped cross-sections, such as elliptical or similar “ten” shapes, etc., in order to better adapt to various hydrodynamic requirements. Ship shafts are usually cylindrical in shape, and sometimes raised or indented designs are added to the shaft to enhance its load-bearing capacity. Some ship shafts can also use special-shaped cross-sections, such as elliptical or similar “ten” shapes, etc., in order to better adapt to various hydrodynamic requirements.
This article will introduce the components, advantages, applications, working principles, processing technology, dimensions and materials of ship shafts in detail.
Ship Shaft Components
1. Spindle
The main shaft of the ship shaft is also called the thrust shaft, which belongs to the active system and is responsible for transmitting the power from the main engine to the propeller, and then transmitting the axial thrust generated by the propeller to the hull.
2. Intermediate Shaft
The intermediate shaft is between the main shaft and the paddle shaft, that is, the shaft between the main engine and the paddle. Some ships already do not use intermediate shafts, a lower number of intermediate shafts is preferred.
3. Tail Shaft
The tail shaft, also known as the stern shaft, is directly connected to the propeller and is the last shaft in the shaft system, mainly installed in the stern tube. Usually conical in shape, the stern shaft of large ships is mounted on two bearings. The stern shaft can withstand the various forces that may act on the stern.
Ship Shaft Advantage
(1) Power transmission, high transmission efficiency
(2) High strength, high durability and corrosion resistance
(3) Able to withstand large loads and torques
(4) Has good hardness and toughness
(5) Easy maintenance and maintenance
(6) It can improve the transmission efficiency and operation stability of the ship
Ship Shaft Application
Ship shaft are widely used in all ship industries, and are used in various important parts of the ship to play a key role in transmitting power to propel the ship.
Ship Shaft Working Principles
Ship shaft power the ship by converting rotational motion into translational motion in the ship’s propulsion system. The propeller is in contact with the external water, and the shaft rotates to drive the shaft. The ship shaft and the propeller work together to generate thrust.
Ship Shaft Processing Technology
1.Selection of ship shaft material: alloy steel or stainless steel with high strength and high corrosion resistance is usually used as raw material. According to the different materials needed by customers, the selection will be different.
2.Ship shaft forging: use a large forging press to beat repeatedly to oxidize the steel more fully. It should be noted that heat treatment should be carried out after forging to eliminate internal stress and ensure the quality of the shaft.
3.Ship shaft heat treatment : Heat treatment of shafts by means of normalizing, tempering, quenching, etc. to improve their strength, hardness, rigidity and other properties.
4.Rough turning of ship shaft: Rough machining of forged ship shafts to obtain more accurate shape, straightness and roundness of the shafts.
5. Vibration reduction: In order to avoid problems such as loosening and vibration of the shaft during operation, it is necessary to perform vibration reduction treatment on the shaft. Generally, the method of back-heavy vibration or front-heavy vibration is used.
6.Finishing: Finishing the shaft by turning and other methods to meet the requirements of high precision and smoothness. At the same time, processing such as finger flow and stretching needs to be performed to ensure the quality of the shaft.
7. Welding: If necessary, weld the shaft with the hub, flange and other parts to improve the overall performance
8. Surface treatment: In order to improve the corrosion resistance of the shaft, the surface can be treated by electroplating or spraying.
9. Dimensional inspection: Finally, carry out dimensional inspection on the post-construction ship shaft to ensure that the shaft meets the design requirements.
Ship Shaft Supply
Ship Shaft Material
(1) carbon steel
(2) stainless steel
(3) alloy steel
(4) Copper
Ship Shaft Size Range
Diameters up to 700 mm
Lengths up to 1000 mm
Other specifications can be customized
The ship shaft can not only transmit power, but also carry the weight of the entire ship. It is the core component of the ship’s propulsion system, so the quality of the ship shaft is very important when selecting it. As a ship shaft manufacturer, Songjie Forging is extremely strict in the inspection and production process of ship shafts, providing customers with the best ship shaft forgings and prolonging their service life.