MEENYON - Customized Marine Gearboxes Manufacturer & Supplier for 40 Years

MARINE POWER UNIT SOLUTION MARINE DIESEL ENGINE) 1

MARINE POWER UNIT SOLUTION MARINE DIESEL ENGINE) 2

MARINE POWER UNIT SOLUTION MARINE DIESEL ENGINE) 3

MARINE POWER UNIT SOLUTION MARINE DIESEL ENGINE) 4

MARINE POWER UNIT SOLUTION MARINE DIESEL ENGINE) 5

MARINE POWER UNIT SOLUTION MARINE DIESEL ENGINE)

Here are some of the world’s top marine diesel engine brands for your reference:

Cummins
Perkins
Caterpillar
MTU
Volvo Penta
Deutz
MAN
Mitsubishi Heavy Industries
Doosan
WinGD
Weichai
Yuchai

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Specification

Item	Description	Parameters
01	Tooth profile accuracy	Grade 6 or higher ISO1328 or AGMA standard
02	Tooth direction accuracy	≦0.01mm
03	Pitch accuracy	±0.005mm
04	Surface roughness	Ra≤0.8μm
05	Module	2-14 mm
06	Number of Teeth	as per gearbox ratio and design
07	Pressure Angle	20°

Features

Marine Power Unit (Marine Diesel Engine and Gearbox Unit)

The marine diesel engine gearbox unit is a core component of a ship's propulsion system, primarily used to efficiently transmit the power from the diesel engine to the propeller, ensuring the vessel's propulsion and maneuverability.

Composition and Structure

The marine diesel engine gearbox unit typically consists of the following components:

- Diesel Engine: The core power-generating equipment that converts fuel combustion into mechanical energy.

- Gearbox: Adjusts the output speed and torque of the diesel engine through gear transmission to match the propeller's requirements.

- Coupling: Connects the diesel engine and gearbox, transmitting power and absorbing vibrations.

- Control System: Monitors and regulates the unit's operating conditions to ensure safety and efficiency.

- Cooling System: Dissipates heat to prevent equipment overheating.

- Lubrication System: Reduces friction and extends the equipment's lifespan.

Working Principle

- The diesel engine generates power, which is transmitted to the gearbox via the coupling.

- The gearbox adjusts the speed and torque as needed and delivers the output to the propeller.

- The control system monitors the operating status in real time to ensure stability and safety.

Key Features

- Efficient Power Transmission: The gearbox optimizes power output, improving fuel efficiency.

- High Reliability: Designed to withstand harsh marine environments, ensuring long-term stable operation.

- Operational Flexibility: Supports forward, reverse, and neutral operations, facilitating vessel control.

- Compact Structure: Saves space, making it suitable for the limited environment on ships.

- Easy Maintenance: Modular design simplifies maintenance and repairs.

Applications

- Commercial Ships: Such as cargo ships, oil tankers, and passenger ships.

- Fishing Vessels: Used for fishing operations.

- Engineering Ships: Such as dredgers and crane vessels.

- Military Ships: Such as patrol boats and frigates.

Technical Parameters

- Power Range: From tens of kilowatts to tens of thousands of kilowatts.

- Speed Range: From hundreds to thousands of revolutions per minute (RPM).

- Gear Ratio: Designed based on requirements, typically ranging from 1:1 to 10:1.

- Materials: The gearbox housing is usually made of cast iron or cast steel, while the gears are made of alloy steel.

Maintenance and Care

- Regular Inspections: Including checks on lubricating oil, gear wear, and couplings.

- Lubrication Management: Regularly replace lubricating oil to ensure the lubrication system functions properly.

- Vibration Monitoring: Periodically detect vibrations to prevent abnormal wear.

- Cooling System Maintenance: Ensure the cooling system operates normally to prevent overheating.

FAQ

What material is usually used for marine gearbox driving gear?

Commonly used materials include high-strength alloy steels such as 20CrMnTi, 18Cr2Ni4WA and 42CrMo. These materials have high strength, good toughness and wear resistance, and are suitable to withstand high loads and impacts.

What are the heat treatment processes of the driving gear?

The main heat treatment processes include: - Carburizing hardening: improve the surface hardness and wear resistance, the surface hardness can reach HRC58-62 with core hardness HRC30-40. - Tempering: eliminate internal stress and improve toughness. - Nitriding treatment: further improve the surface hardness and wear resistance, suitable for high-speed, heavy duty conditions.

What steps does the machining process of the driving gear include?

The processing technology mainly includes: - Forging: Ensure material density and fiber flow. - Roughing: preliminary forming, leaving a margin for finishing. - Finishing: Using high precision CNC machine tools for tooth shape machining. - Grinding teeth: improve tooth shape accuracy and surface quality. - Inspection: Use coordinate measuring machine and gear inspection center to ensure accuracy.

What is the accuracy requirement of the driving gear?

Accuracy requirements include: -Tooth profile accuracy: According to ISO1328 or AGMA standard, usually DIN grade 6 or higher. -Alignment accuracy: The error is controlled within 0.01mm. -Pitch accuracy: The error is controlled within ±0.005mm. -Surface roughness: Ra≤0.8μm

What are the main dimensions of the driving gear?

The main size parameters include: -Module: Usually 2-14mm. -Number of Teeth: Designed according to gearbox ratio. -Pressure Angle: Usually 20°. -Tooth Width (Face Width): common 50-150mm. -Outer Diameter: calculated according to the modulus and number of teeth. Bore Diameter: Fit with shaft, usually 50-200mm.

What are the geometric tolerance requirements for the drive gear?

Geometric tolerances include: -Concentricity: Control within 0.01mm. -Parallelism: Control within 0.02mm. -verticality: Control within 0.01mm.

How to check the accuracy and quality of the driving gear?

Detection methods include: -Coordinate measurement machine: Detect geometric dimensions and form and position tolerances. -Gear detection center: detection of tooth shape, tooth direction and tooth pitch accuracy. -Hardness test: Test surface and core hardness. -Surface roughness detection: Ensure that the tooth surface roughness meets the requirements.

What is the quality control standard for driving gear?

Quality control follows international standards (such as ISO, AGMA) or industry specifications to ensure that the dimensional accuracy, hardness, surface quality and mechanical properties of the gear meet the design requirements.

What are the application scenarios of Marine gearbox driving gear?

The driving gear is widely used in Marine propulsion systems, lifting equipment, construction machinery and other occasions requiring high load and high reliability.

How to maintain the drive gear to extend its service life?

Maintenance measures include: -Check gear meshing and surface wear regularly. -Keep the lubrication system working properly and use suitable lubricating oil. -Avoid overload operation and ensure that the gear works within the rated load.

What is the design life of the driving gear?

The design life is usually 10-20 years, depending on working conditions, load and maintenance.

How to choose the right driving gear supplier?

The following factors should be considered when selecting a supplier: -Technical competence and experience of the supplier. - Quality control system and certification (e.g. ISO/IATF16949, ISO9001). - After-sales service and technical support capabilities.

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