planetary track drive

Planetary Gear Drive
Drive type: speed reducer
Output 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 around the hydraulic motor input
Offset straight in allows the hydraulic motor be mounted off center
Right angle input techniques the hydraulic engine perpendicular to the centerline of the planetary drive for added clearance between components on track drives
Output options
With external shaft includes keyed, flanged or spline options to meet the many required output connections
An added output option includes the output 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 result speed
3 Max radial load placed 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 engine 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 installation of plug-in motors.
Integral multi-disc parking brakes, whilst still keeping the drive small.
Steel or high-influence spheroidal cast iron structure.
Primary bearings provided for high radial and axial load capacities.
Easy maintenance: filling and draining ports locations easy to reach.
Front side mechanical seal designed particularly for the earth-moving machines.
Optimum Torque Up to 170,000 Nm
Transmitting Ratio Up to 230 iN
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Planetary Track Drive Brevini planetary track drives are made 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 given with integral multidisc parking brake and have been created for direct mounting of hydraulic plug-in motors. The careful choice of the materials and design allows our monitor drives, CTD and CTU, to be used in the most serious environmental working conditions. Brevini planetary monitor drive units are the perfect alternative for crawled undercarriages, drilling, crushing, screening and piling machines.
Planetary Track and Wheel drives
The modern and innovative design, the compact construction and the excellent performance characteristics of the PGR/PGW group of gear units make these especially ideal for driving rubber tired or tracked self-propelled vehicles.
These compact planetary track drives are specifically designed for tracked vehicles: excavators and earth-moving machines.
They have a heavy-duty casing, a brief overall length, and great radial and axial load capacity.
They have an intrinsic multidisc failsafe brake and will be installed directly on hydraulic motors and are ready 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 track drives, small, rugged, for construction vehicles
Description
This gear shaft final drive includes LO-HI speed and was created for increased performance. The item is extremely useful especially in wheeled and tracked machines, which feature a significantly different operating/travel speed ratio.
Note that that is also the proper product for road paving machines, along with construction apparatus and forestry machines.
Last drive motors are hydraulic motors with a speed reducing, torque multiplying planetary gear set. In this post, we’ll talk about planetary gear pieces, the parts that make them up, and how they function.
Planetary Gears and Last Drive Motors
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Low Rate, High Torque Motors
Most of the hydraulic motors used for propel motors are low-speed, high-torque (LSHT) motors. Speed and torque are related by power:
Power = Speed x Torque
That means if you want to enhance torque for a given horsepower, we have to reduce speed:
Torque = Power / Speed
Hence the word “low-speed, high-torque.” One way of reducing swiftness involves the use of planetary gears. They offer speed reduction which results in torque multiplication. And they do this all in a compact package in comparison with gear and pinion velocity reducers, and that means they have exceptional torque density. Below you can observe a planetary gear program from your final drive motor.
Planetary gear arranged from your final drive showing the carrier, ring gear, sun equipment, and planetary gears
Carrier for a couple of 3 planetary gears from a final drive
Planetary Gear Systems
In your final drive gear hub, you will usually have two sets of three planetary gears that rotate in regards to a sun gear. They also mesh with a stationary band gear. The upper group of planetary gears are held jointly by a carrier, as demonstrated in the image above. As you can plainly see, all three gears are arranged 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 your final drive work. Input power causes sunlight equipment to rotate at high rate. The planets mesh with both the sun equipment and the ring gear. They orbit the sun equipment while rolling around the band gear. The result is low rate, high torque output rotation.
Maintaining the Planetary Gearbox
On your final drive engine, the planetary gearbox needs gear oil, also called gear lube. It is essential to check the gear oil levels about every 100 hours and change the apparatus oil once a year. If you don’t change out your gear essential oil, you’ll finish up with a thick sludge that will lead to excessive use of your planetary gear system. At Texas Final Drive, we refer to that as “pudding.”
Another key facet of keeping your planetary gearbox is certainly fixing any leaking seals right away. If a seal is usually degraded enough to allow essential oil to leak out, then that means dirt and dirt can make their way in. You don’t want your gears appear to be the gritty mess proven below.
final-drive-hydraulic-motor-gear-oil-sludge-2
Conclusion
Your planetary gearbox is an essential component of your final drive. If it fails, you won’t have the ability to generate the torque you should keep your machine moving. Remember to check and modify the gear oil and don’t ignore leaks. And don’t forget that pudding and grit aren’t the thing you need in your gearbox!
The present day and innovative style, the compact construction and the excellent performance characteristics of the PGR/PGW series of gear units make these especially suitable for generating rubber tired or tracked self-propelled vehicles.