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
Selection of input options
Straight set for an on centerline adaptation offering a symmetrical clearance around the hydraulic motor input
Offset straight in enables the hydraulic engine be mounted off center
Right angle input moves the hydraulic electric motor perpendicular to the centerline of the planetary drive for added clearance between elements 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 output without external shaft by providing 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 would depend on the drive configuration.
2 Max input speed linked to ratio and max output speed
3 Max radial load placed 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 motor inputSAE C or D
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Planetary Track Drives
High torque and load capacities, to transport equipment more than the roughest and steepest terrain.
Designed to allow installation of plug-in motors.
Integral multi-disc parking brakes, whilst still keeping the drive compact.
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 mechanical seal designed particularly for the earth-moving machines.
Optimum Torque Up to 170,000 Nm
Tranny Ratio Up to 230 iN
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Brevini planetary track drives are created for tracked automobiles and earth-moving machines. They possess a heavy-duty casing, a short overall size, and great radial and axial load capability.
Our gearboxes are given with integral multidisc parking brake and have been designed for direct mounting of hydraulic plug-in motors. The careful selection of the components and style allows our track drives, CTD and CTU, to be used in the most severe environmental working conditions. Brevini planetary track drive units will be the perfect alternative for crawled undercarriages, drilling, crushing, screening and piling machines.
Planetary Monitor and Wheel drives
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 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 brief overall length, and great radial and axial load capacity.
They have an intrinsic multidisc failsafe brake and can be installed directly on hydraulic motors and so 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 comes with LO-HI speed and was designed for increased performance. The item is extremely useful specifically in wheeled and tracked devices, which feature a significantly different operating/travel acceleration ratio.
Note that that is also the right 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 arranged. In this post, we’ll talk about planetary gear sets, the parts that produce them up, and how they work.
Planetary Gears and Last Drive Motors
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Low Acceleration, High Torque Motors
The majority of the hydraulic motors used for propel motors are low-speed, high-torque (LSHT) motors. Swiftness and torque are related by power:
Power = Speed x Torque
That means if we want to increase torque for confirmed horsepower, we have to reduce speed:
Torque = Power / Speed
Hence the term “low-speed, high-torque.” One method of reducing quickness involves the usage of planetary gears. They offer speed reduction which results in torque multiplication. And they do this all in a compact package when compared to gear and pinion speed reducers, and that means they have superb torque density. Below you can view a planetary gear system from a final drive motor.
Planetary gear arranged from a final drive showing the carrier, ring gear, sun equipment, and planetary gears
Carrier for a set of 3 planetary gears from your final drive
Planetary Gear Systems
In a 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 ring gear. The upper group of planetary gears are kept with each other by a carrier, as demonstrated in the image above. As you can see, all three gears are organized the same distance from each other. At the guts is a place for sun equipment to mesh and provide input to the system.
How Last Drive Planetary Gears Work
Let’s take a simplified look at how the planetary gears in your final drive work. Insight power causes sunlight equipment to rotate at high quickness. The planets mesh with both the sun equipment and the ring gear. They orbit the sun gear while rolling around the band gear. The effect is low speed, high torque result rotation.
Maintaining the Planetary Gearbox
On a final drive electric motor, the planetary gearbox requires equipment oil, also referred to as gear lube. It is essential to check the gear oil amounts about every 100 hours and change the apparatus oil one per year. If you don’t alter out your gear oil, you’ll end up with a solid sludge that will lead to excessive put on of your planetary gear system. At Texas Last Drive, we make reference to that as “pudding.”
Another key facet of maintaining your planetary gearbox is definitely fixing any leaking seals right away. If a seal is certainly degraded enough to permit essential oil to leak out, after that which means dirt and dirt can make their method in. You don’t want your gears appear to be the gritty mess demonstrated 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 have the ability to generate the torque you need to keep your machine moving. Be sure you check and modify the gear essential 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 wonderful performance characteristics of the PGR/PGW group of gear units make these especially suitable for generating rubber tired or tracked self-propelled vehicles.