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
Selection of input options
Straight set for an upon centerline adaptation giving a symmetrical clearance around the hydraulic motor input
Offset straight in allows the hydraulic motor be mounted off center
Right angle input movements 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 up the various required output connections
An added output option 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 engine 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 mounting 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 specifically for the earth-moving devices.
Maximum 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 devices. They possess a heavy-duty casing, a short overall size, and great radial and axial load capability.
Our gearboxes are given with essential multidisc parking brake and have been designed 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 track drive units are the perfect answer for crawled undercarriages, drilling, crushing, screening and piling machines.
Planetary Track and Wheel drives
The modern and innovative design, the compact construction and the wonderful performance characteristics of the PGR/PGW series of gear units make these especially suitable for traveling rubber tired or tracked self-propelled vehicles.
These compact planetary track drives are specifically created 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 track drives, small, rugged, for construction vehicles
Description
This gear shaft final drive includes LO-HI speed and was designed for increased performance. That is extremely useful specifically in wheeled and tracked machines, which feature a significantly different operating/travel velocity ratio.
Note that this 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 arranged. In this post, we'll talk about planetary gear models, the parts that make them up, and how they work.
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 you want to enhance torque for a given horsepower, we have to reduce speed:
Torque = Power / Speed
Hence the term “low-speed, high-torque.” One method of reducing speed involves the use of planetary gears. They offer speed reduction which results in torque multiplication. And they do this all in a concise package in comparison with gear and pinion swiftness reducers, and which means they have exceptional torque density. Below you can observe a planetary gear system from a final drive motor.
Planetary gear set from your final drive showing the carrier, ring equipment, 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. In addition they mesh with a stationary band gear. The upper set of planetary gears are kept collectively by a carrier, as proven 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 gear to mesh and offer input to the system.
How Last Drive Planetary Gears Work
Let's take a simplified look in 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 quickness, high torque output rotation.
Maintaining the Planetary Gearbox
On a final drive engine, the planetary gearbox needs equipment oil, also known as gear lube. It is vital to check the gear oil amounts about every 100 hours and change the gear oil once a year. If you don't change out your gear oil, you'll end up with a thick sludge that will result in excessive use of your planetary equipment system. Here at Texas Last Drive, we make reference to that as “pudding.”
Another key facet of maintaining your planetary gearbox is fixing any leaking seals immediately. If a seal is usually degraded enough to permit essential oil to leak out, then which means dirt and dirt can make their way in. You do not want your gears look like the gritty mess demonstrated 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 should keep your machine shifting. Remember to check and modify the gear essential oil and don't ignore leaks. Also keep in mind that pudding and grit are not the thing you need in your gearbox!
The present day and innovative design, the compact construction and the wonderful performance characteristics of the PGR/PGW series of gear units make these especially ideal for driving rubber tired or tracked self-propelled vehicles.