Application des réducteurs agricoles dans les volets roulants électriques au sein des systèmes de déroulement électrique

1. Technical Specifications: The “Tropics-Guard” Series

Data generated for DC and AC roll-up motors suitable for film lengths up to 120 meters.

2. Mastering the Microclimate: The Role of Electric Roll-Up Units in Tropical Agriculture

In the high-intensity protected cultivation sector of Brazil (Plasticultura), the ability to precisely control temperature and humidity is the difference between a premium harvest and a total crop loss due to fungal diseases like Botrytis. The Electric Roll-Up System (known locally as “Motor Redutor de Enrolar”) is the automated muscle behind this control. Unlike manual hand-cranks, which require labor-intensive operation during sudden tropical storms, Agrinulear’s electric gearboxes allow for instant, remote-controlled deployment of side curtains (ventilation) and thermal blankets (shading/insulation). This automation is critical for the vast flower markets of Holambra and the seedling nurseries of Minas Gerais.

Notre agricultural gear reducer units are specifically calibrated for the low-speed, high-torque requirements of rolling long spans of plastic film or aluminized thermal screens. A standard industrial motor spins too fast; our integrated worm-gear reduction system steps down the speed to a safe 3-5 RPM, preventing the “bellows effect” where wind rips the plastic during rapid movement. Furthermore, Agrinulear Nucleo Agro (Agence Ever-power Brésil) has engineered these units with a self-locking mechanism. In the event of a power failure—a common occurrence in rural Brazil—the heavy thermal blanket will not unroll under its own weight, ensuring your crop remains protected from the scorching mid-day sun or the chill of a southern frost.

3. The Anatomy of Automation: How It Works

The electric roll-up system is designed to replace the manual “creeper” gearboxes typically found on the sides of greenhouses. The unit mounts directly onto the roll-up tube (usually galvanized steel pipe) using a specialized clamp and telescopic arm. Inside the agricultural gear reducer, a high-speed DC or AC motor drives a worm gear set. This worm gear is the secret to the system’s safety: it provides a high reduction ratio (typically 400:1 to 800:1) which multiplies the motor’s torque enough to lift heavy wet thermal blankets, while also acting as a brake. The worm can drive the gear, but the gear cannot back-drive the worm.

Crucially, Agrinulear units feature an integrated Double Limit Switch System. In manual systems, operators often over-crank the mechanism, causing the plastic film to tear away from the hip board or wrap entirely around the pipe, destroying the vent. Our limit switches allow the grower to set precise “Open” and “Closed” positions. Once set, the motor counts its revolutions and stops automatically at the exact ventilation point required, every single time. This enables integration with climate computers that open the vents by 10% or 50% depending on the temperature sensor readings inside the greenhouse.

4. Engineered for the “Estufa”: Adapting to Brazilian Conditions

Brazil’s climate presents a paradox for greenhouse equipment: intense UV radiation during the day and saturating humidity at night (often 100% RH). A standard agricultural manufacturer might use plastic housing covers that degrade and crack under the Minas Gerais sun within two years, exposing the electronics to rain. Agrinulear uses UV-stabilized ABS covers and die-cast aluminum alloy gear housings that reflect heat and resist corrosion. Our circuit boards are “conformal coated” to prevent short circuits caused by the condensation that drips from the greenhouse roof.

Moreover, Brazilian growers often face “Tempestades de Verão” (Summer Storms) with strong wind gusts. A non-locking gearbox allows the wind to unroll the curtain, causing the greenhouse to balloon and potentially collapse structurally. Our heavy-duty self-locking worm gear holds the vent shut with over 200Nm of resistance force, effectively sealing the greenhouse against the storm. We also offer 24VDC models which are preferred in Brazil for compliance with NR-10 and NR-12 safety norms, eliminating the risk of high-voltage shock in the wet environment of a hydroponic facility.

5. Safety First: Meeting Brazil’s NR-12 & NR-10

Electrical safety in damp agricultural environments is non-negotiable. NR-10 (Safety in Electrical Installations) strongly advises the use of Extra-Low Voltage (ELV) systems in areas with high moisture. That is why our flagship product for Brazil is the 24VDC roll-up motor. It eliminates the risk of lethal shock to workers who might touch the metal greenhouse frame during a fault. For larger systems requiring 220V, our units come with double-insulated cabling and IP65 terminal boxes. Additionally, adhering to NR-12 (Machinery Safety), all our motors feature enclosed moving parts, minimizing pinch points during the rolling operation.

6. [Engineer’s Log] Greenhouse Field Reports

7. Complete Automation & Hardware Solutions

Agrinulear Nucleo Agro is your partner for comprehensive agricultural mechanics. While you automate your greenhouse, consider upgrading your field equipment as well. We supply high-grade Sprockets and chains for conveyor systems in packing sheds. For your tractor-mounted implements, our safety-certified PTO Shafts provide reliable power transmission. We also offer durable Pulleys for ventilation fan drives, ensuring your entire farm runs on quality components.

8. Frequently Asked Questions

Q1: Can I use a single transformer to power multiple 24V roll-up motors?

A1: Yes, but you must calculate the total amperage. If each motor draws 4 Amps under load and you have 10 motors, you need a transformer capable of delivering at least 50 Amps (allowing for a safety margin) to prevent voltage drop that could stall the motors.

Q2: How do I set the limit switches on the Agrinulear roll-up unit?

A2: It’s a simple process. Open the back cover to access the adjustment screws. Run the motor to the desired “Closed” position and turn the corresponding screw until the micro-switch clicks. Repeat for the “Open” position. Our manual includes a visual guide specifically for this.

Q3: Will this motor work for rolling up heavy thermal blankets (manta térmica)?

A3: Absolutely. For thermal blankets, which are heavier than standard plastic film, we recommend our “High-Torque” series (100Nm). Ensure your roll-up tube is rigid enough (e.g., 1-inch steel) to prevent bowing under the weight.

Q4: Is the gearbox waterproof enough for outdoor side vents?

A4: Yes, our units are rated IP65, meaning they are dust-tight and protected against low-pressure water jets from any direction. They are designed specifically to be installed outdoors on the side of the greenhouse, exposed to rain.

Q5: What happens if the power goes out while the vents are open?

A5: The unit will stay in its current position due to the self-locking worm gear. It will not crash down. However, you cannot operate it without power. For critical crops, we recommend a backup generator or our 24V battery-backup controller.

Q6: Can I control these motors with my existing climate computer?

A6: Yes, Agrinulear motors are compatible with most major climate control systems (e.g., Priva, Hoogendoorn, or local Brazilian controllers). They typically require a simple relay interface to switch the polarity for direction control (for DC models).

Q7: What is the maximum length of greenhouse side vent one motor can handle?

A7: A standard 60Nm motor can handle up to 80-100 meters of standard plastic film. However, if using heavier insect nets or thermal screens, or if the greenhouse is very tall (high roll-up height), you should reduce the length to 60 meters or step up to a 100Nm motor.

Q8: Do you stock spare parts in Brazil?

A8: Yes, our distribution center stocks replacement limit switches, carbon brushes, and mounting clamps. We understand that a broken vent can mean crop loss, so we prioritize rapid parts availability.

Q9: Does the motor require maintenance or lubrication?

A9: The gearbox is sealed for life with high-quality synthetic grease, so no internal lubrication is needed. We recommend visually inspecting the mounting bolts and the telescopic arm connection once a season to ensure they remain tight.

Q10: Can I get a quote for a complete project with 50 greenhouses?

A10: Absolutely. Please contact our sales team with your greenhouse dimensions and film type. We can offer project-based pricing and even assist with the electrical layout planning for the motor groups.

Éditeur : PXY