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 set for an on centerline adaptation providing a symmetrical clearance around the hydraulic motor input
Offset straight in allows the hydraulic engine be mounted off center
Right angle input movements the hydraulic 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 the many required output connections
An added output choice includes the result without external shaft by offering an internal 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 linked to ratio and max result speed
3 Max radial load positioned at optimum load position
4 Weight varies with configuration and ratio selected
5 Requires tapered roller planet bearings (not available 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 carry equipment over the roughest and steepest terrain.
Designed to allow mounting of plug-in motors.
Integral multi-disc parking brakes, whilst still keeping the drive small.
Steel or high-impact spheroidal cast iron framework.
Primary bearings provided for high radial and axial load capacities.
Easy maintenance: filling and draining ports places easy to reach.
Front mechanical seal designed specifically for the earth-moving machines.
Maximum Torque Up to 170,000 Nm
Transmitting Ratio Up to 230 iN
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Brevini planetary monitor 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 capacity.
Our gearboxes are given with integral 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 monitor drives, CTD and CTU, to be used in the most serious environmental working conditions. Brevini planetary monitor drive units are the perfect option for crawled undercarriages, drilling, crushing, screening and piling machines.
Planetary Track and Wheel drives
The modern and innovative style, the compact construction and the excellent performance characteristics of the PGR/PGW group of gear units make these especially suitable for traveling rubber tired or tracked self-propelled vehicles.
These compact planetary monitor drives are specifically created 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 integral multidisc failsafe brake and may be installed on hydraulic Planetary Track Drive 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 track drives, compact, rugged, for construction vehicles
Description
This gear shaft final drive includes LO-HI speed and was made for increased performance. The item is extremely useful specifically in wheeled and tracked devices, which feature a significantly different operating/travel quickness ratio.
Note that this is also the right product for road paving machines, along with construction products and forestry machines.
Final drive motors are hydraulic motors with a speed reducing, torque multiplying planetary gear set. In this post, we’ll discuss planetary gear units, the parts that make them up, and how they function.
Planetary Gears and Final Drive Motors
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Low Velocity, High Torque Motors
The majority 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 term “low-speed, high-torque.” One way of reducing velocity involves the use of planetary gears. They offer speed reduction which results in torque multiplication. Plus they do this all in a concise package when compared to gear and pinion rate reducers, and which means they have superb torque density. Below you can observe a planetary gear system from your final drive motor.
Planetary gear arranged from a final drive displaying the carrier, ring equipment, sun gear, and planetary gears
Carrier for a couple of three planetary gears from your final drive
Planetary Gear Systems
In your final drive gear hub, you will most likely 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 set of planetary gears are kept together by a carrier, as proven in the picture above. As you can plainly see, all three gears are arranged an equal distance from one another. At the guts is a location for sun equipment to mesh and offer input to the system.
How Final Drive Planetary Gears Work
Let’s take a simplified look at the way the planetary gears in a final drive work. Insight power causes sunlight equipment to rotate at high acceleration. The planets mesh with both the sun equipment and the ring gear. They orbit sunlight equipment while rolling around the band gear. The result is low swiftness, high torque result rotation.
Maintaining the Planetary Gearbox
On your final drive motor, the planetary gearbox needs equipment oil, also called gear lube. It is vital to check the gear oil levels about every 100 hours and change the apparatus oil once a year. If you don’t modify out your gear essential oil, you’ll end up with a heavy sludge that will result in excessive put on of your planetary equipment system. At Texas Final Drive, we make reference to that as “pudding.”
Another key aspect of maintaining your planetary gearbox is usually fixing any leaking seals immediately. If a seal is definitely degraded enough to permit oil to leak out, then that means dirt and dirt can make their method in. You don’t want to have your gears appear to be the gritty mess shown 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 be able to generate the torque you need to keep your machine shifting. Remember to check and change the gear oil and don’t ignore leaks. Also keep in mind that pudding and grit aren’t the thing you need in your gearbox!
The modern and innovative style, 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.