China Standard China Advance Marine Gearbox (MB242) gearbox and motor

Product Description

Marine Gearbox MB242 possesses functions of speed reduction, ahead and astern clutching and bearing propeller thrust. It is designed of vertically offset and one-stage transmission, featuring in small in volume, light in weight and convenient in dis- and reassembly and maintenance.Marine Gearbox MB242 is suitable for medium and small fishing, transport, tug, traffic and passenger boats.
 

Input speed 1000-2500r/min
Reduction ratio 2.00,2.54,3.04,3.52,3.95,4.53 Trans. capacity 0.103kw/r/min
5.12 0.100kw/r/min
5.56 0.094kw/r/min
5.88 0.074kw/r/min
Control way Push-and-pull flexible shaft, electrically, pneumatically
Rated thrust 30KN
Center distance 242mm
L×W×H 442×774×763mm
Net weight 385kg
Flywheel SAE14,11.5
Bell housing SAE1,2

New Diesel Machinery can not only offer engine ,and related spare parts , this gearbox  is manufactured by 1 of the biggest gearbox manufacturer in China, with technologies ,Standing on transmission industry, relying on science and technology progress, core competitiveness is enhanced and leading position in theindustry area is established. Since 1980s, based on independent development, the Company has imported advanced foreign technology and realized secondary innovation. The products area has been expanded into 10 families covering over 1000 types, from single marine gearbox to 10 types, thousands of products, including motive marine propulsion system, construction machinery transmissions, wind turbine transmissions, auto transmissions,agricultural transmissions, rail transittransmissions,industrial transmissions,  special products,powder metallurgical (P/M) products, and large-sized high-precision gears.             

Application: Motor, Marine
Layout: Cycloidal
Hardness: Hardened
Installation: Horizontal Type
Step: Four-Step
Type: Circular Gear
Customization:
Available

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Customized Request

cycloidal gearbox

Calculation of Reduction Ratio in a Cycloidal Gearbox

The reduction ratio in a cycloidal gearbox can be calculated using the following formula:

Reduction Ratio = (Number of Input Pins + Number of Output Pins) / Number of Output Pins

In a cycloidal gearbox, the input pins engage with the lobes of the cam disc, while the output pins are engaged with the cycloidal pins of the output rotor. The reduction ratio determines the relationship between the number of input and output pins engaged at any given time.

For example, if a cycloidal gearbox has 7 input pins and 14 output pins engaged, the reduction ratio would be:

Reduction Ratio = (7 + 14) / 14 = 1.5

This means that for every 1 revolution of the input pins, the output rotor will complete 1.5 revolutions. The reduction ratio is a key parameter that influences the output speed and torque of the cycloidal gearbox.

cycloidal gearbox

Noise and Vibration Considerations in Cycloidal Gearboxes

Cycloidal gearboxes are generally known for their smooth and quiet operation. However, like any mechanical system, they can still exhibit some level of noise and vibration. Here are the key factors to consider:

  • Gear Design: The unique rolling contact design of cycloidal gears contributes to their relatively low noise levels. The teeth engagement is gradual and continuous, reducing impact forces and noise.
  • Lubrication: Proper lubrication is essential to minimize friction and noise. Using high-quality lubricants and maintaining proper lubrication levels can help reduce noise and vibration in cycloidal gearboxes.
  • Precision Manufacturing: Precise manufacturing processes and tight tolerances can help minimize irregularities in gear meshing, which can contribute to noise and vibration.
  • Load Distribution: Proper load distribution among multiple lobes in the cycloidal mechanism can help prevent localized stress concentrations that could lead to vibrations and noise.
  • Bearing Quality: High-quality bearings can contribute to smooth operation and reduce vibrations that could be transmitted to the gearbox housing.
  • Mounting and Installation: Proper mounting and alignment of the gearbox are important to ensure that it operates smoothly and without excessive vibrations.

While cycloidal gearboxes are designed to minimize noise and vibration, it’s important to consider the specific application, environmental conditions, and operating parameters. Regular maintenance, proper lubrication, and selecting the appropriate gearbox size and type can all contribute to reducing noise and vibration levels in cycloidal gearboxes.

cycloidal gearbox

Principle of Cycloidal Gearing

Cycloidal gearing is a mechanism that utilizes the unique shape of cycloidal discs to achieve motion transmission. The principle involves the interaction between two main components: the input disc and the output disc.

The input disc has lobes with pins, while the output disc has lobes with matching holes. The lobes on both discs are not perfectly circular but are shaped in a cycloidal profile. As the input disc rotates, the pins on its lobes engage with the holes in the output disc’s lobes.

As the input disc rotates, the pins move along the cycloidal paths, causing the output disc to rotate. The interaction between the pins and the holes results in smooth and continuous motion transfer. The unique shape of the cycloidal profile ensures that there is always at least one point of contact between the pins and the holes, allowing for efficient torque transmission and reduced wear.

Cycloidal gearing provides advantages such as high torque capacity, compact size, and precision motion. However, due to the complex shape of the components and the continuous engagement, manufacturing and assembly of cycloidal gearboxes can be intricate.

China Standard China Advance Marine Gearbox (MB242)   gearbox and motor	China Standard China Advance Marine Gearbox (MB242)   gearbox and motor
editor by CX 2023-09-28