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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 move forward, backward and turn.
Main engine gearbox:
The main engine gearbox is usually driven by the main engine and is used to transmit and adjust the main power of the ship. Depending on the propulsion equipment and needs of the ship, the main engine transmission can provide different output torque and speed according to the transmission ratio.
Side thruster gearbox:
The side thruster gearbox is usually installed on the side of the ship and drives the side thruster to rotate, which is used to adjust and control the lateral propulsion of the ship. It can realize the translation and rotation of the ship, improve the flexibility and maneuverability of navigation.
Steering wheel gearbox:
The steering gear gearbox is mainly used to transfer and adjust the operating torque of the steering gear to help the steering man control the direction of the ship. It is combined with the ship's steering gear and control system to adjust the direction and Angle of the propeller by transmitting the motion of the steering gear.
Windlass gearbox:
The windlass gearbox is mainly used to control the ship's windlass system, including the retracting and lowering of the anchor rope, the lifting of the anchor chain and the operation of the clutch. It has the characteristics of high torque and low speed, and can operate the windlass system safely and reliably.
Auxiliary transmission:
Auxiliary gearboxes are usually used to drive auxiliary equipment on the ship, such as pumps, generators, air conditioning compressors, etc. According to different needs and working conditions, auxiliary transmission can provide different output speed and torque to meet the working requirements of auxiliary equipment.
Concentric gear box:
Concentric gear boxes are often referred to as in-line gear boxes and are commonly used in high torque applications. The drive and driven shafts of each transmission are mounted horizontally and aligned with each other. The gearboxes are mounted next to each other, representing the port and starboard engine propulsion units.
Parallel transmission:
A parallel transmission is used as long as two outputs are connected to one input (connected at the same time) and vice versa as long as two inputs are connected to a single output (connected one at a time). These gearboxes are suitable for two shafts with high and low speed requirements. As with the concentric gearbox, the drive shaft and the driven shaft are mounted horizontally, and the output shaft is parallel to each other.
Right Angle gear box:
The right-angle transmission transmits the power generated at the drive end of the engine to the drive shaft in a 90-degree direction. On ships, a common application of this technology is azimuth thrusters, where no rudder is installed but instead a propeller acts as both rudder and propulsion. When the engine is facing the desired direction of the ship, it remains the driving force of the propeller.
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 move forward, backward and turn.
Main engine gearbox:
The main engine gearbox is usually driven by the main engine and is used to transmit and adjust the main power of the ship. Depending on the propulsion equipment and needs of the ship, the main engine transmission can provide different output torque and speed according to the transmission ratio.
Side thruster gearbox:
The side thruster gearbox is usually installed on the side of the ship and drives the side thruster to rotate, which is used to adjust and control the lateral propulsion of the ship. It can realize the translation and rotation of the ship, improve the flexibility and maneuverability of navigation.
Steering wheel gearbox:
The steering gear gearbox is mainly used to transfer and adjust the operating torque of the steering gear to help the steering man control the direction of the ship. It is combined with the ship's steering gear and control system to adjust the direction and Angle of the propeller by transmitting the motion of the steering gear.
Windlass gearbox:
The windlass gearbox is mainly used to control the ship's windlass system, including the retracting and lowering of the anchor rope, the lifting of the anchor chain and the operation of the clutch. It has the characteristics of high torque and low speed, and can operate the windlass system safely and reliably.
Auxiliary transmission:
Auxiliary gearboxes are usually used to drive auxiliary equipment on the ship, such as pumps, generators, air conditioning compressors, etc. According to different needs and working conditions, auxiliary transmission can provide different output speed and torque to meet the working requirements of auxiliary equipment.
Concentric gear box:
Concentric gear boxes are often referred to as in-line gear boxes and are commonly used in high torque applications. The drive and driven shafts of each transmission are mounted horizontally and aligned with each other. The gearboxes are mounted next to each other, representing the port and starboard engine propulsion units.
Parallel transmission:
A parallel transmission is used as long as two outputs are connected to one input (connected at the same time) and vice versa as long as two inputs are connected to a single output (connected one at a time). These gearboxes are suitable for two shafts with high and low speed requirements. As with the concentric gearbox, the drive shaft and the driven shaft are mounted horizontally, and the output shaft is parallel to each other.
Right Angle gear box:
The right-angle transmission transmits the power generated at the drive end of the engine to the drive shaft in a 90-degree direction. On ships, a common application of this technology is azimuth thrusters, where no rudder is installed but instead a propeller acts as both rudder and propulsion. When the engine is facing the desired direction of the ship, it remains the driving force of the propeller.
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