| Technische parameter<\/th>\n | Waarde \/ Standaard<\/th>\n | Eenheid \/ Context<\/th>\n<\/tr>\n<\/thead>\n |
|---|---|---|
| Rated Voltage<\/td>\n | 24V DC \/ 220V AC \/ 380V AC<\/td>\n | Three-Phase Options Available<\/td>\n<\/tr>\n |
| Uitgaand koppel<\/td>\n | 150 – 600<\/td>\n | Nm (Heavy Duty)<\/td>\n<\/tr>\n |
| Rotational Speed<\/td>\n | 2.8 – 5.2<\/td>\n | RPM (Precision Control)<\/td>\n<\/tr>\n |
| Reductieverhouding<\/td>\n | 1:400 to 1:1200<\/td>\n | Worm Gear Set<\/td>\n<\/tr>\n |
| Max Screen Area<\/td>\n | 2000 – 5000<\/td>\n | Square Meters<\/td>\n<\/tr>\n |
| As-diameter<\/td>\n | 30 \/ 40 \/ 50<\/td>\n | mm (Hollow\/Solid)<\/td>\n<\/tr>\n |
| Limit Switch Type<\/td>\n | Double Micro-Adjustable<\/td>\n | Rotary Counter<\/td>\n<\/tr>\n |
| Limit Range<\/td>\n | 0 – 60<\/td>\n | Revoluties<\/td>\n<\/tr>\n |
| IP-classificatie<\/td>\n | IP55 \/ IP65<\/td>\n | Moisture Resistant<\/td>\n<\/tr>\n |
| Huisvestingsmateriaal<\/td>\n | Die-Cast Aluminum ADC12<\/td>\n | Corrosiebestendig<\/td>\n<\/tr>\n |
| Materiaal tandwiel<\/td>\n | KK Alloy Bronze \/ 40Cr Steel<\/td>\n | Slijtvast<\/td>\n<\/tr>\n |
| Self-Locking<\/td>\n | Yes (Static Hold >800Nm)<\/td>\n | Safety Feature<\/td>\n<\/tr>\n |
| Smering<\/td>\n | Mobilux EP2 \/ Synthetic<\/td>\n | High Temp Grease<\/td>\n<\/tr>\n |
| Isolatieklasse<\/td>\n | F (155\u00b0C)<\/td>\n | Thermische Bescherming<\/td>\n<\/tr>\n |
| Bedrijfstemperatuur<\/td>\n | -15\u00b0C tot +55\u00b0C<\/td>\n | Omgevings<\/td>\n<\/tr>\n |
| Bedrijfsduur<\/td>\n | S2 – 15min<\/td>\n | Short Time Duty<\/td>\n<\/tr>\n |
| Motor Power<\/td>\n | 180W – 750W<\/td>\n | Load Dependent<\/td>\n<\/tr>\n |
| Montage<\/td>\n | Chain Coupling \/ Rack & Pinion<\/td>\n | Drive Interface<\/td>\n<\/tr>\n |
| Thermal Switch<\/td>\n | Integrated (135\u00b0C Cut-off)<\/td>\n | Overheat Safety<\/td>\n<\/tr>\n |
| Gewicht<\/td>\n | 12kg – 28kg<\/td>\n | Robust Build<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
2. Thermal Dynamics: The Heart of Nighttime Heating & Frost Protection<\/h2>\nIn the specialized agricultural zones of Brazil, such as the high-altitude coffee nurseries of Minas Gerais or the export-grade flower farms of Holambra, maintaining nighttime temperatures is critical. While active heating (heaters) is expensive, the primary method of heat management is the deployment of aluminized thermal screens (Manta T\u00e9rmica). The Electric Roll-Up Heating System<\/strong> provided by Agrinulear Nucleo Agro is the kinetic engine behind this energy efficiency. Unlike simple side vents, thermal screen drive systems require significantly higher torque and precision to pull heavy, multi-layered fabrics across vast spans of truss work without sagging or jamming. A failure in this gearbox during a cold July night in Southern Brazil can lead to catastrophic frost damage within hours.<\/p>\n Onze landbouw tandwielkast<\/strong> units for heating applications are distinct from standard ventilation motors. They feature dual-shaft outputs and reinforced worm-gear sets designed to handle the high static loads of fully extended thermal blankets. We utilize high-grade bronze alloy gears (CuSn12Ni2) to minimize wear during the slow, high-torque start-up phase. Furthermore, considering the “Estufa” environment where humidity condenses on the roof and drips directly onto the drive systems, Agrinulear units are sealed to IP65 standards. This ensures that the internal electronics and lubrication remain uncontaminated, guaranteeing that your thermal defense system deploys reliably every single evening, locking in the solar heat accumulated during the day.<\/p>\n <\/p>\n While side vents often use simple tube motors, the “Heating Equipment” aspect of a greenhouse\u2014specifically the horizontal thermal screens\u2014relies on a more sophisticated landbouw tandwielkast<\/strong> setup. Agrinulear employs a Rack and Pinion<\/strong> drive system for these applications. The gearbox is centrally mounted on the truss and drives a main torque shaft (push-pull tube). Pinions attached to this shaft engage with racks connected to the leading edge of the thermal screen. As the gearbox turns, it pushes the screen across the greenhouse bay.<\/p>\n The critical engineering challenge here is “Synchronization.” If the gearbox has backlash (play) or if the torque is uneven, the screen will skew, jamming in the tracks and tearing the expensive aluminized fabric. Agrinulear’s gearboxes feature precision-machined worm shafts with a deviation tolerance of less than 0.02mm. This ensures smooth, stutter-free movement. Additionally, our integrated Limit Switch System<\/strong> is mechanically linked to the output shaft, counting rotations with absolute precision. This allows growers to open the screen exactly 2% to “gap” the humidity release in the morning without losing all the accumulated heat, a technique essential for controlling Botrytis in Brazilian rose production.<\/p>\n <\/p>\n The Brazilian “Cerrado” region and the interior of S\u00e3o Paulo present a unique threat profile for electrical heating equipment: Red Dust (P\u00f3 Vermelho) and rapid thermal cycling. The fine, abrasive red clay dust can penetrate standard motor housings, grinding bearings to a halt within months. Agrinulear landbouwfabrikant<\/strong> engineers have countered this by implementing a “Labyrinth Seal” design on all output shafts, backed by double-lip NBR seals. This creates a tortuous path that dust cannot navigate.<\/p>\n Furthermore, the intense heat during the day followed by rapid cooling at night creates a vacuum effect that sucks moisture into warm gearboxes. To prevent this, our heavy-duty units are equipped with sintered bronze breather vents that allow air pressure equalization while blocking moisture ingress. We also use UV-resistant powder coating (RAL 2004 Orange or Grey) that reflects solar radiation, keeping the internal oil temperature within the optimal viscosity range even when mounted in the roof apex where temperatures can exceed 50\u00b0C.<\/p>\n <\/p>\n In the context of overhead machinery like thermal screen drives, NR-12<\/strong> (Machinery Safety) is paramount. A gearbox failure overhead could drop heavy steel tubes onto workers below. Agrinulear units are engineered with a Safety Factor of 2.5, meaning they can hold 2.5 times their rated load without mechanical yielding. They also feature self-locking worm gears that act as a passive brake\u2014if power is cut, the screen locks in place instantly.<\/p>\n Regarding NR-10<\/strong> (Electrical Safety), our 24VDC options are increasingly popular for low-height structures to eliminate shock hazards. For 220V\/380V systems, we provide terminal boxes with double insulation and grounding points clearly marked. We also supply mandatory safety signage stickers with every unit, helping farm owners pass their labor inspections (Minist\u00e9rio do Trabalho) with ease.<\/p>\n <\/p>\n “Frost is a real killer here. We retrofitted Agrinulear 400Nm gearboxes to drive heavy double-layer thermal screens. The self-locking feature saved us during a blackout in July; the screens stayed closed, keeping the nursery at 12\u00b0C while it was -2\u00b0C outside.”<\/p>\n – Sr. Almeida, Orchid Grower<\/span><\/p>\n<\/div>\n “We use retractable roof systems driven by Agrinulear rack drives. The precision of the limit switches allows us to open the roof exactly 10% to vent humidity without losing heat. The reliability has been flawless for 3 seasons.”<\/p>\n – Operations Manager, Felipe G.<\/span><\/p>\n<\/div>\n “Our previous motors burned out trying to pull the heavy blackout cloth. The Agrinulear ‘Thermo-Drive’ has incredible torque at low RPM. It moves the screen smoothly without the jerking motion that used to tear our fabrics.”<\/p>\n – Greenhouse Tech, Sofia L.<\/span><\/p>\n<\/div>\n “Salt spray from the coast corroded our old aluminum housings. The powder-coated Agrinulear units look new after 2 years. The IP65 sealing is definitely working against the salty humidity.”<\/p>\n – Plantation Manager, Jo\u00e3o P.<\/span><\/p>\n<\/div>\n “We needed a cost-effective automation solution. The compatibility of Agrinulear motors with our local controllers meant we didn’t have to upgrade our entire computer system. Plug and play.”<\/p>\n |
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