1. Technical Specifications: Ventilation Winch Performance Data
Calibrated for Automated Curtain and Inlet Systems in Tropical Climates.
| Parameter Description | Spécification Technique | Unit / Standard |
|---|---|---|
| Lifting Capacity | 500 – 3500 | kg (Vertical Load) |
| Gear Ratio | 1:30 / 1:40 / 1:60 | Self-Locking Ratio |
| Drum Capacity | 30 – 120 | Meters (Cable Length) |
| Cable Diameter | 4mm / 5mm / 6mm | Galvanized Steel |
| Input Torque | 15 – 45 | Nm (Manual/Motor) |
| Couple de sortie | 300 – 1500 | Nm |
| Matériaux de construction | Cast Aluminum / HT250 | Corrosion Resistant |
| Worm Material | 20CrMnTi Alloy Steel | Carburized & Quenched |
| Worm Wheel Material | KK Alloy Bronze (CuSn12) | Wear Resistant |
| Self-Locking Mechanism | Double Worm Gear | Zero Back-drive |
| Operation Mode | Manual / Motorized Interface | Dual Function |
| Motor Flange | IEC 71B14 / 80B14 | Standard Fit |
| Protection Class | IP55 / IP65 | Dust & Water Proof |
| Lubrication | Lithium Grease / Synth Oil | Life-time Lube |
| Surface Treatment | Electrostatic Powder Coating | UV Resistant |
| Operating Temp | -20°C to +60°C | Ambient Range |
| Safety Factor | 3.5 | Static Load |
| Limit Switch Interface | Integrated Rotary Cam | Optional |
| Shaft Orientation | Single / Double Output | For Pipe Connection |
| Mounting Type | Wall / Ceiling / Beam | Universal Bracket |
2. Mastering Airflow: The Critical Role of Winch Gearboxes in Tropical Ventilation
In the high-density broiler and layer farms of Brazil, managing heat stress is the single most critical factor for productivity. The Winch Systems Gearbox acts as the mechanical muscle behind the environmental control system, precisely adjusting side curtains (cortinas) and air inlet baffles to regulate airflow, temperature, and humidity. Unlike standard manual winches used in general construction, the boîte de vitesses agricole required for modern “Dark House” or Tunnel Ventilation poultry sheds must offer absolute precision and zero-creep self-locking capabilities. A failure in the winch system during a power outage or a sudden tropical storm in Santa Catarina can lead to massive flock mortality within minutes if the curtains do not drop or close as programmed. Agrinulear Nucleo Agro (Agence Ever-power Brésil) has engineered a range of heavy-duty winch gearboxes specifically for these life-critical applications. Our units utilize a double-reduction worm gear mechanism that provides a high reduction ratio, allowing for fine-tuned control of the curtain position—down to the millimeter. This precision is essential for maintaining the static pressure required for effective tunnel ventilation. Furthermore, our gearboxes are designed to integrate seamlessly with automated climate controllers, serving as the reliable interface between the digital brain of the farm and the physical reality of the poultry house structure.
The operating environment in a Brazilian livestock facility is aggressive. The winch gearbox is often mounted externally or near the eaves, exposed to intense UV radiation, torrential rains, and the corrosive exhaust fumes (ammonia and dust) extracted from the shed. Standard steel winches rust and seize rapidly under these conditions. Agrinulear’s agricultural gear reducer for winches features a housing made from high-grade cast aluminum alloy or specially treated cast iron with a multi-layer epoxy coating. Internal components, such as the worm shaft, are manufactured from heat-treated alloy steel and run in a sealed oil bath or heavy-duty grease reservoir, protected by automotive-grade double-lip seals. This “install and forget” reliability ensures that farm managers in Mato Grosso can focus on bird health rather than worrying about mechanical failures in their ventilation infrastructure. As a leading agricultural manufacturer, we test our winches to exceed the safety factors required by Brazilian NR-12 machinery safety standards, ensuring protection for both the livestock and the operators.
3. Working Principle: The Physics of Self-Locking Ventilation
The core functionality of the Winch Systems Gearbox revolves around the worm gear principle. Unlike spur gears or chain drives, a worm gear setup naturally resists back-driving. When the input shaft (connected to a hand crank or an electric motor) turns the screw-like worm, it drives the worm wheel and the cable drum. However, the weight of the curtain pulling back on the cable cannot turn the worm in reverse due to the friction angle of the gear teeth. This creates an intrinsic “Self-Locking” safety feature. In our boîte de vitesses agricole designs, we optimize this helix angle to ensure that even heavy, wet curtains spanning 150 meters cannot cause the winch to slip. For automated systems, we incorporate a dual-shaft design where the gearbox drives a long tubular shaft (drive pipe) that runs the length of the coop. This pipe winds up the cables evenly, ensuring the curtain rises and falls level, preventing air leaks that could disrupt the ventilation static pressure.
4. Engineered for Brazil: Resisting Corrosion and Humidity
Brazil’s climate poses unique challenges for mechanical equipment. In the southern states like Paraná, high humidity and frequent rainfall are common, while in the Cerrado regions, dust and intense heat prevail. Additionally, the internal atmosphere of a poultry house is laden with ammonia, which is highly corrosive to yellow metals and untreated steel. Agrinulear Nucleo Agro has adapted our boîte de prise de force manufacturing expertise to create a “Tropicalized” winch gearbox. We replace standard venting plugs with sintered bronze breathers that prevent dust ingress while allowing pressure equalization. The worm wheel utilizes a specific Nickel-Bronze alloy that resists ammonia-induced stress corrosion cracking. Furthermore, the external coating is not just aesthetic; it is a baked-on polyester powder coat tested to withstand 500 hours of salt spray, ensuring the unit survives in coastal farming areas near Santos or Recife.
5. Universal Compatibility: Retrofitting the Industry
We recognize that Brazilian farmers utilize a mix of imported and locally manufactured ventilation equipment. Our winch gearboxes are engineered to be universal replacements, matching the mounting footprints and shaft sizes of major global and local brands. Whether you are upgrading an older manual house to an automated system or replacing a failed unit, our gearboxes are compatible with:
- Munters™: Drive units for inlet and curtain systems.
- Plasson™: Replacement gearboxes for climate control actuators.
- Big Dutchman™: Compatible winches for lateral ventilation.
- Cumberland™: Heavy-duty upgrades for curtain machines.
- Local Brazilian OEMs: Custom drive shafts available for regional fabricators.
Disclaimer: All original equipment manufacturer (OEM) names, trademarks, and model numbers mentioned are for reference and identification purposes only. Agrinulear Nucleo Agro is an independent manufacturer and is not affiliated with, endorsed by, or sponsored by these entities.
6. [Engineer’s Log] Brazilian Field Performance Report
Case 1: Brazil (Cascavel, PR) – Broiler Dark House
“We automated our side curtains with the Agrinulear motorized winch gearbox. The precision is incredible. We can open the inlet just 2cm to manage winter ventilation without chilling the birds. The self-locking feature is rock solid.”
– Farm Manager, Lucas R.
Case 2: Brazil (Bastos, SP) – Layer Complex
“Our old winches rusted out in 2 years due to the ammonia from the manure pit. The coated Agrinulear units look brand new after 3 years. The sealed grease bath really protects the internal gears.”
– Maintenance Lead, Felipe S.
Case 3: Brazil (Rio Verde, GO) – Swine Finishing
“We use these gearboxes for the feed line lifting system as well. They handle the load of a full feed line easily. The fact that we can use a cordless drill to operate them in emergencies is a lifesaver.”
– Production Director, João P.
Case 4: Brazil (Chapecó, SC) – Breeder House
“Storms here can be sudden. We need the curtains to close fast. The gear ratio on the Agrinulear unit is perfect—fast enough for emergencies but torque-rich enough to lift wet, heavy curtains.”
– Owner, Roberto M.
Case 5: Brazil (Minas Gerais) – Coffee Drying Greenhouse
“We adapted these winches for our greenhouse roof vents. The UV resistance is key because they are mounted on the roof in direct sunlight. No plastic parts to crack, just solid metal.”
– Agronomist, Elena V.
7. Complete Drivetrain Solutions for Modern Agriculture
At Agrinulear Nucleo Agro, we provide more than just winches. We offer a comprehensive suite of power transmission components to ensure your farm machinery runs smoothly. Our high-performance PTO Shafts are essential for tractor-driven implements. For your feeding and conveyor systems, we manufacture precision Sprockets that guarantee smooth engagement. Additionally, our industrial-grade Chains are built to withstand the rigorous demands of daily farm operation. We emphasize system compatibility and the convenience of a one-stop supply for all your mechanical needs.
8. FAQ:
Q1: How do I calculate the capacity needed for my curtain winch gearbox?
A1: You need to calculate the total weight of the curtain material plus the friction of the pulley system. As a rule of thumb for Brazil, a 150m side curtain typically requires a gearbox with at least 1500kg lifting capacity to handle the extra load when wet.
Q2: Can I use a cordless drill to operate your manual winches?
A2: Yes, many of our manual models feature a removable handle and a hex-shaft adapter specifically designed to be driven by a heavy-duty cordless drill, which speeds up operation significantly during maintenance or emergencies.
Q3: Are your winches compatible with Munters climate controllers?
A3: Absolutely. Our motorized versions are compatible with standard 24V DC or 220V AC signals used by Munters, Rotem, and other common climate computers found in Brazilian poultry houses.
Q4: What maintenance is required for the winch gearbox?
A4: Our units are designed to be “maintenance-free” for their service life, being sealed with long-life grease. However, we recommend inspecting the external seals and cable attachment points annually to ensure no physical damage has occurred.
Q5: Do you stock replacement parts in São Paulo?
A5: Yes, Agrinulear Nucleo Agro maintains a comprehensive warehouse in São Paulo state. We stock replacement handles, worm gear sets, and limit switches, ensuring rapid delivery to any part of Brazil.
Q6: How does the self-locking mechanism work?
A6: The self-locking feature is achieved through the geometry of the worm gear. The angle of the worm threads is such that the output gear cannot drive the input shaft backwards, holding the load securely in place without a separate brake.
Q7: Is the paint coating resistant to UV radiation?
A7: Yes, we use a specialized polyester powder coating that is highly resistant to UV degradation. This prevents the paint from chalking or peeling even after years of exposure to the strong Brazilian sun.
Q8: Can this winch be used for feeder line lifting?
A8: Yes, our heavy-duty models are frequently used for suspending and lifting feed and water lines. Ensure you select a model with the appropriate weight capacity for your specific line length.
Q9: What is the warranty period for these gearboxes?
A9: We offer a standard 1-year warranty on all our agricultural gearboxes against manufacturing defects. Extended warranty options are available for large-scale project installations.
Q10: Do you provide installation guides in Portuguese?
A10: Yes, all our products shipped to Brazil come with comprehensive installation and maintenance manuals in Portuguese to assist local technicians and farm staff.
Éditeur : PXY
