planetary track drive

Planetary Gear Drive
Drive type: speed reducer
Result torque: 33,895 Nm (25,000 lb-ft)
Max input speed: 2800 rpm
Features
Variety of input options
Straight in for an upon centerline adaptation offering a symmetrical clearance about the hydraulic motor input
Offset straight in enables the hydraulic motor be mounted off center
Right angle input moves the hydraulic electric motor perpendicular to the centerline of the planetary drive for added clearance between parts on track drives
Output options
With external shaft includes keyed, flanged or spline options to meet up the many required output connections
An added output choice includes the result without external shaft by offering an interior spline at the output
F25R
Planetary Gear Drive
Ratings
Input power (max)71 kW (95 hp)
Input speed (max)2800 rpm2
Output torque (intermittent)33,895 Nm (25,000 lb-ft)
Output torque (continuous)18,710 Nm (13,800 lb-ft)
1 Actual ratio is dependent on the drive configuration.
2 Max input speed related to ratio and max output speed
3 Max radial load positioned at optimum load position
4 Weight varies with configuration and ratio selected
5 Requires tapered roller planet bearings (unavailable with all ratios)
General data
Approximate dry weight215 – 263 kg (475 – 580 lb)4
Radial load (max)28,570 kg (63,000 lb)3
Drive typeSpeed reducer
Hydraulic electric motor inputSAE C or D
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Planetary Track Drives
High torque and load capacities, to transport equipment over the roughest and steepest terrain.
Designed to allow mounting of plug-in motors.
Integral multi-disc parking brakes, while still keeping the drive small.
Steel or high-effect spheroidal cast iron framework.
Main bearings provided for high radial and axial load capacities.
Easy maintenance: filling and draining ports places easy to reach.
Front side mechanical seal designed particularly for the earth-moving devices.
Optimum Torque Up to 170,000 Nm
Transmitting Ratio Up to 230 iN
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Brevini planetary track drives are created for tracked automobiles and earth-moving machines. They have a heavy-duty casing, a brief overall length, and great radial and axial load capability.
Our gearboxes are provided with essential multidisc parking brake and have been created for direct installation of hydraulic plug-in motors. The careful selection of the materials and style allows our track drives, CTD and CTU, to be utilized in the most severe environmental working conditions. Brevini planetary track drive units are the perfect option for crawled undercarriages, drilling, crushing, screening and piling devices.
Planetary Track and Wheel drives
The modern and innovative design, the compact construction and the wonderful performance characteristics of the PGR/PGW group of gear units make these especially suitable for driving rubber tired or tracked self-propelled vehicles.
These compact planetary monitor drives are specifically made for tracked vehicles: excavators and earth-moving machines.
They have a heavy-duty casing, a short overall length, and great radial and axial load capacity.
They have an intrinsic multidisc failsafe brake and can be installed on hydraulic motors and so are prepared to accept ‘plug-in’ hydraulic motors.
Characteristics
Type:
planetary
Shaft orientation:
coaxial
Torque:
> 10 kNm
Performance:
high-torque, high load capacity
Other characteristics:
for wheel and monitor drives, small, rugged, for construction vehicles
Description
This gear shaft final drive includes LO-HI speed and was made for increased performance. That is extremely useful especially in wheeled and tracked devices, which feature a considerably different operating/travel speed ratio.
Note that that is also the proper product for street paving machines, along with construction devices and forestry machines.
Final drive motors are hydraulic motors with a speed reducing, torque multiplying planetary gear set. In this article, we’ll discuss planetary gear sets, the parts that produce them up, and how they function.
Planetary Gears and Final Drive Motors
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Low Acceleration, High Torque Motors
Most of the hydraulic motors used for propel motors are low-speed, high-torque (LSHT) motors. Acceleration and torque are related by power:
Power = Speed x Torque
That means if we want to boost torque for confirmed horsepower, we need to reduce speed:
Torque = Power / Speed
Hence the word “low-speed, high-torque.” One method of reducing swiftness involves the use of planetary gears. They provide speed reduction which results in torque multiplication. And they do this all in a compact package when compared to gear and pinion acceleration reducers, and which means they have exceptional torque density. Below you can observe a planetary gear system from your final drive motor.
Planetary gear set from your final drive showing the carrier, ring equipment, sun gear, and planetary gears
Carrier for a set of 3 planetary gears from your final drive
Planetary Gear Systems
In your final drive gear hub, you will usually have two sets of three planetary gears that rotate about a sun gear. They also mesh with a stationary ring gear. The upper set of planetary gears are kept jointly by a carrier, as proven in the picture above. As you can see, all three gears are organized an equal distance from each other. At the center is a place for sun equipment to mesh and provide input to the machine.
How Final Drive Planetary Gears Work
Let’s take a simplified look at how the planetary gears in a final drive work. Input power causes the sun equipment to rotate at high velocity. The planets mesh with both the sun equipment and the ring equipment. They orbit the sun equipment while rolling around the band gear. The result is low swiftness, high torque output rotation.
Maintaining the Planetary Gearbox
On your final drive electric motor, the planetary gearbox requires gear oil, also known as gear lube. It is essential to check the gear oil amounts about every 100 hours and change the gear oil one per year. If you don’t alter out your gear essential oil, you’ll end up with a solid sludge that will result in excessive use of your planetary equipment system. Here at Texas Final Drive, we make reference to that as “pudding.”
Another key facet of maintaining your planetary gearbox can be fixing any leaking seals immediately. If a seal is certainly degraded enough to permit oil to leak out, then that means dirt and dust can make their method in. You don’t want to have your gears look like the gritty mess proven below.
final-drive-hydraulic-motor-gear-oil-sludge-2
Conclusion
Your planetary gearbox is a key component of your final drive. If it fails, you won’t be able to generate the torque you have to keep your machine moving. Be sure you check and modify the gear essential oil and don’t ignore leaks. Also keep in mind that pudding and grit aren’t what you need in your gearbox!
The modern and innovative style, the compact construction and the excellent performance characteristics of the PGR/PGW series of gear units make these especially ideal for generating rubber tired or tracked self-propelled vehicles.