Markets
Hydraulic systems are integral to silage machines (e.g., forage harvesters, balers, wrappers), providing power and control for cutting, conveying, and processing crops. Below is a detailed breakdown of hydraulic components used, along with high-market-share products and models:
1. Hydraulic Pumps
Role: Generate fluid flow to power motors and cylinders.
Common Types: Axial piston pumps (variable displacement for efficiency).
Top Models:
Bosch Rexroth A10VO Series (e.g., A10VO 28/31/45) – Widely used in mobile hydraulics.
Parker Hannifin PVP Series (e.g., PVP 16/20/40) – Compact design for agricultural machinery.
Eaton 7000 Series (e.g., 7031, 7045) – High-pressure pumps for demanding applications.
Danfoss 90 Series – Optimized for closed-circuit systems in harvesters.
2. Hydraulic Motors
Role: Drive cutting heads, feed rollers, and augers.
Common Types: Radial piston or orbital motors for high torque.
Top Models:
Bosch Rexroth A6VM/A2FM Series – High-torque motors for heavy loads.
Parker F11/F12 Series – Compact motors for balers and wrappers.
Eaton 6000 Series (e.g., 6010) – Robust performance in forage harvesters.
Danfoss Plus+1 90 Series – Integrated control for precision.
3. Hydraulic Cylinders
Role: Adjust header height, control baler tension, or operate wrapping arms.
Top Models:
Parker Hannifin DP Series – High-duty cycles for agricultural use.
Eaton CMA Series – Corrosion-resistant for outdoor environments.
Bosch Rexroth HY Series – Customizable stroke and mounting.
4. Directional Control Valves
Role: Regulate fluid flow to actuators.
Common Types: Proportional valves for precision.
Top Models:
Bosch Rexroth 4WE Series (e.g., 4WE6) – Reliable spool valves.
Parker D1VW Series – Compact, high-flow valves.
Eaton DG Series – Modular design for flexibility.
Danfoss PVG Series – Proportional control for complex functions.
5. Hoses & Fittings
Role: Transport hydraulic fluid under high pressure.
Top Models:
Parker 429/79 Series Hoses – Abrasion-resistant for fieldwork.
Gates MegaSys – High-pressure spiral hoses.
Eaton Synflex – Lightweight thermoplastic hoses.
Fittings: Parker 60 Series, Eaton Aeroquip.
6. Hydraulic Reservoirs & Filters
Role: Store fluid and remove contaminants.
Top Models:
HYDAC HDU Series Filters – High-efficiency filtration.
Parker Filtration Group (e.g., P3/P5 Series) – Compact filters.
Donaldson Hydraulic Filters – Durable for dusty conditions.
7. Accumulators
Role: Stabilize pressure and absorb shocks.
Top Models:
HYDAC SB/SK Series – Bladder-type for energy storage.
Eaton LA Series – Piston accumulators for high-pressure systems.
8. Hydrostatic Transmissions
Role: Combine pumps and motors for drivetrain power (e.g., self-propelled harvesters).
Top Models:
Danfoss H1 Series – Integrated closed-circuit systems.
Kawasaki K3V Series Pumps – Paired with K8V motors.
Key Manufacturers with High Market Share
Bosch Rexroth – Dominant in pumps, motors, and valves.
Parker Hannifin – Leading in valves, cylinders, and hoses.
Eaton – Strong in pumps, motors, and filtration.
Danfoss – Innovator in compact hydraulic systems.
HYDAC – Specialized in filtration and accumulators.
Application Examples
Forage Harvesters: Bosch Rexroth A10VO pumps power cutterheads, while Parker cylinders adjust headers.
Balers: Danfoss PVG valves control bale density, and Eaton motors drive compression mechanisms.
Wrappers: Parker F11 motors rotate wrapping arms, paired with HYDAC accumulators for smooth operation.
These components ensure efficiency, durability, and precision in silage machinery, with manufacturers like John Deere and Claas often sourcing from the above brands.
