China wholesaler Large External Bull Gear of Planetary Gearbox top gear

Product Description

 Large External Bull Gear of Planetary Gearbox

Machining Capability

Our Gear, Pinion Shaft, Ring Gear Capabilities: 

Capabilities of Gears/ Splines    
Item Internal Gears and Internal Splines External Gears and External Splines
Milled Shaped Ground Hobbed Milled Ground
Max O.D. 2500 mm
Min I.D.(mm) 30 320 20
Max Face Width(mm) 500 1480
Max DP 1 0.5 1 0.5
Max Module(mm) 26 45 26 45
DIN Class Level DIN Class 8 DIN Class 4 DIN Class 8 DIN Class 4
Tooth Finish Ra 3.2 Ra 0.6 Ra 3.2 Ra 0.6
Max Helix Angle ±22.5° ±45° 

 

Our Main Product Range

1. Spur Gear

2. Planetary Gear
3. Metal Gears
4. Gear Wheel
5. Ring Gear
6. Gear Shaft
7. Helical Gear
8. Pinion Shaft
9. Spline Shaft
 

 

 

Company Profile

1. 21 years experience in high quality gear, gear shaft’s production, sales and R&D.

2. Our Gear, Gear Shaft are certificated by ISO9001: 2008 and ISO14001: 2004.

3. CHINAMFG has more than 50 patents in high quality Gear, Gear Shaft manufacturing.

4. CHINAMFG products are exported to America, Europe.

5. Experience in cooperate with many Fortune 500 Companies

Our Advantages

1) In-house capability: OEM service as per customers’ requests, with in-house tooling design & fabricating

2) Professional engineering capability: On product design, optimization and performance analysis

3) Manufacturing capability range: DIN 3960 class 8 to 4, ISO 1328 class 8 to 4, AGMA 2000 class 10-15, JIS 1702-1703 class 0 to 2, etc.

4) Packing: Tailor-made packaging method according to customer’s requirement

5) Just-in-time delivery capability

FAQ

1. Q: Can you make as per custom drawing?

A: Yes, we can do that.

2. Q: If I don’t have drawing, what can you do for me?
A: If you don’t have drawing, but have the sample part, you may send us. We will check if we can make it or not.

3. Q: How do you make sure the quality of your products?
A: We will do a series of inspections, such as:
A. Raw material inspection (includes chemical and physical mechanical characters inspection),
B. Machining process dimensional inspection (includes: 1st pc inspection, self inspection, final inspection),
C. Heat treatment result inspection,
D. Gear tooth inspection (to know the achieved gear quality level),
E. Magnetic particle inspection (to know if there’s any cracks in the gear).
We will provide you the reports 1 set for each batch/ shipment.   

Application: Wind Turbine
Hardness: Hardened Tooth Surface
Gear Position: External Gear
Customization:
Available

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Customized Request

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Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

epicylic gear

How do you calculate the gear ratio involving sun, planet, and ring gears?

The gear ratio in a planetary gear system can be calculated by considering the number of teeth on the sun gear, planet gears, and ring gear. The gear ratio determines the relationship between the input speed and the output speed of the system. Here’s how you can calculate the gear ratio:

  • Step 1: Count the Teeth:

Count the number of teeth on the sun gear (S), the planet gears (P), and the ring gear (R). These numbers represent the respective gear’s tooth count.

  • Step 2: Determine the Gear Arrangement:

Identify the gear arrangement. In a simple planetary gear system, the sun gear is at the center, surrounded by planet gears, and enclosed by the ring gear.

  • Step 3: Calculate the Gear Ratio:

The gear ratio (GR) can be determined using the formula:

GR = (R + P) / S

Where:

  • R represents the number of teeth on the ring gear
  • P represents the number of teeth on the planet gears (assuming they have the same number of teeth)
  • S represents the number of teeth on the sun gear

The resulting gear ratio represents the speed relationship between the input and output of the planetary gear system. A gear ratio greater than 1 indicates a speed reduction, while a gear ratio less than 1 indicates a speed increase.

It’s important to note that in more complex planetary gear systems, where there are multiple sets of planet gears or additional gears, the calculation of the gear ratio may involve considering multiple gear stages and their respective tooth counts.

In summary, to calculate the gear ratio involving sun, planet, and ring gears, you need to count the teeth on each gear and use the formula (R + P) / S, where R is the number of teeth on the ring gear, P is the number of teeth on the planet gears, and S is the number of teeth on the sun gear. This calculation provides the gear ratio that defines the speed relationship between the input and output of the planetary gear system.

epicylic gear

How do planetary gears handle variations in direction and torque transmission?

Planetary gears are versatile mechanisms that can effectively handle variations in direction and torque transmission. Let’s explore how they achieve this:

  • Direction Reversal:

Planetary gears are capable of transmitting torque in both forward and reverse directions. By changing the input and output connections, the direction of rotation can be reversed without the need for additional components or complex mechanisms. This makes planetary gears well-suited for applications where frequent changes in direction are required, such as automotive transmissions.

  • Torque Amplification and Reduction:

One of the notable characteristics of planetary gears is their ability to amplify or reduce torque depending on the arrangement of gear components. Let’s consider a basic arrangement with a sun gear, planet gears, and a ring gear:

  • Torque Amplification:

When the sun gear is the input and the ring gear is the output, the planet gears rotate on their own axes while also revolving around the sun gear. This arrangement allows for torque amplification, meaning the output torque can be higher than the input torque. This is particularly useful in applications where higher torque is required, such as heavy machinery or power transmission systems.

  • Torque Reduction:

Conversely, by fixing the ring gear and using the sun gear as the output, the planet gears rotate on their own axes while also revolving around the fixed ring gear. In this configuration, the output torque is lower than the input torque, enabling torque reduction. This can be advantageous in applications where torque needs to be reduced, such as speed reduction systems or precision machinery.

  • Combination of Gear Stages:

Planetary gears can be combined into multiple stages, with each stage having its own set of sun gears, planet gears, and ring gears. This arrangement allows for further variations in torque transmission. By connecting the output of one stage to the input of another, the torque can be further amplified or reduced, providing flexibility in power transmission systems.

  • Custom Gear Ratios:

By selecting the appropriate sizes and numbers of teeth for the sun gears, planet gears, and ring gears, custom gear ratios can be achieved in planetary gear systems. This allows for precise control over torque transmission and enables the adaptation of the gear arrangement to specific application requirements.

In summary, planetary gears handle variations in direction and torque transmission through their ability to reverse direction without additional components, torque amplification or reduction based on gear arrangement, combination of multiple gear stages, and the ability to achieve custom gear ratios. These features make planetary gears a versatile choice for a wide range of applications requiring efficient and flexible power transmission.

epicylic gear

What industries commonly use planetary gears in their applications?

Planetary gears find applications in a wide range of industries and mechanical systems. Let’s explore some of the industries that commonly utilize planetary gears:

  • Automotive Industry:

The automotive industry extensively uses planetary gears in various applications. Planetary gears are commonly found in automatic transmissions, where they enable smooth gear shifting, provide different gear ratios, and transmit torque efficiently. They are also used in differential systems, allowing wheels to rotate at different speeds while maintaining power distribution.

  • Robotics and Automation:

Planetary gears play a crucial role in robotics and automation systems. They are employed in robotic joints and actuators to provide precise motion control, compact size, and high torque transmission. Planetary gears enable robotic arms to move accurately and handle heavy loads, making them essential components in industrial robots and robotic manipulators.

  • Aerospace and Aviation:

The aerospace and aviation industries utilize planetary gears in various applications. They are used in aircraft landing gear systems, where they provide reliable torque transmission and compact design. Planetary gears are also employed in aircraft engine systems, helicopter rotor systems, and satellite mechanisms due to their efficiency, high torque capacity, and ability to operate in space-restricted environments.

  • Power Generation:

Planetary gears are utilized in power generation equipment, including wind turbines and hydroelectric generators. In wind turbines, planetary gears enable the conversion of low-speed rotor rotation to high-speed generator rotation, ensuring efficient power generation. They are also employed in hydroelectric generators to transmit power from turbines to electrical generators, providing gear reduction and torque amplification.

  • Industrial Machinery:

Planetary gears are widely used in industrial machinery applications. They are found in heavy-duty machinery such as mining equipment, construction machinery, and material handling systems. Planetary gears provide high torque transmission, compactness, and durability, making them suitable for handling demanding tasks in industrial environments.

  • Marine and Shipbuilding:

The marine and shipbuilding industries employ planetary gears in various marine propulsion systems. They are used in marine engines, propeller systems, and thrusters. Planetary gears provide efficient power transmission, speed control, and compact design for propulsion systems in vessels ranging from small boats to large ships.

  • Medical Equipment:

In the medical field, planetary gears are utilized in various equipment and devices. They are found in medical imaging systems like CT scanners and MRI machines, providing precise motion control and reducing image distortion. Planetary gears are also used in surgical robots and medical devices that require compact size, high torque, and accurate positioning.

These are just a few examples of the industries that commonly use planetary gears in their applications. The versatility, efficiency, and compactness of planetary gears make them suitable for a broad range of industries where precise motion control, torque transmission, and space-saving design are essential requirements.

China wholesaler Large External Bull Gear of Planetary Gearbox top gearChina wholesaler Large External Bull Gear of Planetary Gearbox top gear
editor by CX 2023-10-11