| Param\u00e8tre technique<\/th>\n | Specification \/ Value<\/th>\n | Unit \/ Context<\/th>\n<\/tr>\n<\/thead>\n |
|---|---|---|
| Input Power Rating<\/td>\n | 200 – 1500<\/td>\n | kW (Diesel\/Electric)<\/td>\n<\/tr>\n |
| Reduction Ratio<\/td>\n | 1.5:1 to 6.3:1<\/td>\n | Single\/Double Stage<\/td>\n<\/tr>\n |
| Couple de sortie<\/td>\n | 5,000 – 85,000<\/td>\n | Nm<\/td>\n<\/tr>\n |
| Vitesse d'entr\u00e9e<\/td>\n | 1200 – 2100<\/td>\n | RPM (Engine Std)<\/td>\n<\/tr>\n |
| Vitesse de sortie<\/td>\n | 350 – 750<\/td>\n | RPM (Pump Impeller)<\/td>\n<\/tr>\n |
| Service Factor<\/td>\n | 2.0 – 3.5<\/td>\n | Heavy Shock Load<\/td>\n<\/tr>\n |
| Mat\u00e9riaux de construction<\/td>\n | Nodular Iron QT500-7<\/td>\n | Vibration Damping<\/td>\n<\/tr>\n |
| Gear Type<\/td>\n | Helical, Case Hardened<\/td>\n | Grinding Class 5\/6<\/td>\n<\/tr>\n |
| Gear Material<\/td>\n | 17CrNiMo6 \/ 20CrMnTi<\/td>\n | Forged Alloy Steel<\/td>\n<\/tr>\n |
| Bearing Life (L10)<\/td>\n | 50,000+<\/td>\n | Hours<\/td>\n<\/tr>\n |
| Thrust Bearing<\/td>\n | Integrated Spherical Roller<\/td>\n | Absorbs Pump Thrust<\/td>\n<\/tr>\n |
| Lubrication System<\/td>\n | Forced Feed + Cooler<\/td>\n | External Pump<\/td>\n<\/tr>\n |
| Capacit\u00e9 d'huile<\/td>\n | 40 – 250<\/td>\n | Litres<\/td>\n<\/tr>\n |
| Clutch Integration<\/td>\n | Optional Hydraulic Clutch<\/td>\n | Engage\/Disengage<\/td>\n<\/tr>\n |
| Efficiency<\/td>\n | \u2265 98%<\/td>\n | Per Stage<\/td>\n<\/tr>\n |
| Noise Level<\/td>\n | < 85<\/td>\n | dB(A) @ 1m<\/td>\n<\/tr>\n |
| Paint Specification<\/td>\n | Marine Epoxy 300\u00b5m<\/td>\n | Salt Spray Resistant<\/td>\n<\/tr>\n |
| Seal Type<\/td>\n | Taconite \/ Labyrinth<\/td>\n | Sand Exclusion<\/td>\n<\/tr>\n |
| Duret\u00e9 de l'arbre<\/td>\n | HB 280 – 320<\/td>\n | Toughened Core<\/td>\n<\/tr>\n |
| Poids<\/td>\n | 850 – 4500<\/td>\n | kg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
2. Powering the Pulse of Hydraulic Dredging: Torque vs. Resistance<\/h2>\nIn the demanding environments of Brazil’s hydraulic infrastructure maintenance, from the silt-heavy irrigation canals of Rio Grande do Sul to the alluvial gold mining operations in Par\u00e1, the Dredge Pump Gearbox<\/strong> is the critical link between power and production. A dredge pump (bomba de dragagem) operates under uniquely punishing conditions where the load is never constant. As the suction head encounters varying densities of sand, clay, or gravel, the torque requirement spikes instantaneously. A standard industrial reducer is ill-equipped for these shock loads, leading to gear tooth fracture or bearing delamination. For an agricultural manufacturer<\/strong> focusing on rural infrastructure, reliability means ensuring that irrigation channels remain open and floodwaters are managed without mechanical downtime.<\/p>\n Agrisous Nucl\u00e9o Agro<\/strong> has developed the “River-Master” series agricultural gear reducer<\/strong> specifically for these amphibious applications. Unlike generic gearboxes, our units feature an oversized service factor (typically >2.0) and a reinforced housing cast from Nodular Iron (QT500-7) to absorb vibration. Crucially, given the semi-submerged or splash-zone operation typical of river dredging barges, we implement a “Marine-Spec” sealing system. This includes triple-lip seals protected by a physical slinger ring to prevent the ingress of abrasive silica sand, which is the primary cause of seal failure in the Amazon basin. Whether driving a cutter-suction head or a main booster pump, our gearboxes ensure that the torque is delivered smoothly, maximizing the solids-handling capacity of your operation.<\/p>\n <\/p>\n A dredge pump works on the principle of centrifugal force, but unlike water pumps, it must move a mixture that is significantly heavier and more viscous. To do this effectively, the pump impeller must rotate at a specific speed (Tip Speed) to create enough suction without causing excessive cavitation or wear. Most industrial diesel engines operate most efficiently at 1800-2100 RPM, which is far too fast for a large 12-inch or 18-inch dredge pump (typically 400-600 RPM). The Dredge Pump Gearbox<\/strong> acts as the precise negotiator in this powertrain. It reduces the engine speed while multiplying the torque, allowing the impeller to shear through the riverbed material.<\/p>\n Agrinulear’s mechanism includes a critical safety feature: the “Thrust Block.” A working dredge pump generates massive axial forces pushing back towards the driver as it sucks in water and sand. Standard electric motors or diesel flywheels cannot withstand this load. Our gearboxes integrate a heavy-duty spherical roller thrust bearing on the output shaft that isolates these forces, preventing them from traveling back into the precise gear mesh or the engine crankshaft. This integration simplifies the drivetrain design for Brazilian barge builders, eliminating the need for a separate, expensive external bearing assembly.<\/p>\n <\/p>\n Dredging in Brazil is a unique challenge. The waters of the Rio Madeira are notoriously loaded with abrasive sediments, while the Pantanal wetlands require shallow-draft equipment that can withstand high temperatures. A standard bo\u00eete de prise de force<\/strong> adapted for this use often fails due to overheating. Agrinulear agricultural manufacturer<\/strong> engineers have addressed this by equipping our “River-Master” units with a forced-lubrication system that includes an oversized oil cooler (water-to-oil or air-to-oil). This ensures that even when the barge deck temperature hits 50\u00b0C in the tropical sun, the gear oil remains below the critical oxidation threshold.<\/p>\n Furthermore, environmental compliance with IBAMA (Brazilian Institute of Environment) requires that no oil leaks into the waterway. A blown seal on a dredge pump drive is not just a mechanical failure; it is an environmental violation. We utilize a “Zero-Leak” sealing architecture that combines a mechanical face seal with a pressurized grease barrier. This positive pressure keeps the river water and sand out, while keeping the lubricating oil securely inside, ensuring that your operation remains compliant and eco-friendly.<\/p>\n <\/p>\n <\/p>\n In the Brazilian dredging market, many smaller operators still rely on V-belt drives or direct hydraulic motors. While cheap initially, V-belts slip significantly when wet or under shock loads (like hitting a submerged log), leading to a 10-15% loss in production. Hydraulic drives, while versatile, suffer from inherent heat losses and require complex cooling systems. Agrinulear agricultural gear reducer<\/strong> units offer a mechanical efficiency of over 98%, delivering virtually all the engine’s power to the pump. We offer drop-in compatibility for major global and local pump configurations:<\/p>\n Disclaimer:<\/strong> All original equipment manufacturer (OEM) names, trademarks, and model numbers (e.g., Warman, Damen, IHC) 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 brands.<\/p>\n <\/p>\n “Cleaning rice irrigation channels requires torque. We hit clay banks often. The belt drives used to burn up smoke. The Agrinulear gearbox just powers through. We’ve doubled our daily dredging distance.”<\/p>\n – Maintenance Chief, Sr. Roberto<\/span><\/p>\n<\/div>\n “Sand is the enemy. It destroys everything. The labyrinth seals on the ‘River-Master’ are the only ones that have lasted a full season without leaking. It’s built like a tank.”<\/p>\n – Site Supervisor, Jo\u00e3o D.<\/span><\/p>\n<\/div>\n “Downtime in the port costs thousands per hour. We swapped to Agrinulear for the main booster pumps. The integrated oil cooler kept temps down during our 24\/7 campaign.”<\/p>\n – Fleet Manager, Engineer Silva<\/span><\/p>\n<\/div>\n “We needed a gearbox that could handle the shock of hitting submerged timber. The case-hardened gears in this unit have survived impacts that shattered our previous coupling.”<\/p>\n – Project Lead, Mateo G.<\/span><\/p>\n<\/div>\n “Operating in the Pantanal means strict environmental rules. No leaks allowed. The zero-leak guarantee of the Agrinulear unit helped us pass the IBAMA inspection.”<\/p>\n – Compliance Officer, Luiza M.<\/span><\/p>\n<\/div>\n<\/div>\n <\/p>\n A dredging barge is a complex system of interconnected machinery. Beyond the main pump drive, Agrinulear Nucleo Agro supplies the essential components to keep your auxiliary systems running. For winch drives and cutter head positioning, our high-strength Chains<\/a> offer superior corrosion resistance. For auxiliary power take-offs to drive hydraulic pumps or generators, our PTO Shafts<\/a> are the industry standard for durability. We also manufacture precision Sprockets<\/a> for conveyor loading systems. Trust Agrinulear for a complete, compatible power transmission solution.<\/p>\n <\/p>\n A1: For sand suction, the load is relatively steady, but start-up can be heavy. We recommend a service factor of 1.5 to 1.75. However, if you are dredging gravel or areas with potential rocks (shock loads), you should increase this to 2.0 or 2.5 to protect the gear teeth from fracture.<\/p>\n<\/details>\n A2: Yes, our “River-Master” series includes an integrated thrust block with heavy-duty spherical roller bearings. This design is specifically engineered to absorb the hydraulic thrust from the pump, eliminating the need for you to install a separate external thrust bearing assembly.<\/p>\n<\/details>\n A3: Absolutely. For operation in regions like the Amazon or Pantanal, we provide gearboxes with integrated oil coolers. You can choose between an air-blast radiator or a water-cooled heat exchanger that utilizes the raw water from the river (filtered) to cool the gear oil.<\/p>\n<\/details>\n A4: We offer a wide range of standard ratios from 1.5:1 to 6.3:1. This allows you to match a standard 1800 RPM or 2100 RPM diesel engine to the optimal impeller speed of your pump, whether it’s a slow 400 RPM gravel pump or a faster 700 RPM sand pump.<\/p>\n<\/details>\n A5: Yes, Agrinulear Nucleo Agro maintains a strategic parts inventory in S\u00e3o Paulo. We stock seal kits, bearings, and gear sets for our most popular models. We understand that in dredging, time is money, and we aim for 24-48 hour dispatch for critical spares.<\/p>\n<\/details>\n A6: Standard seals often fail due to abrasive sand ingress. Our system uses a “Taconite” style seal which combines a grease purgeable labyrinth with triple-lip contact seals. The grease acts as a barrier, pushing contaminants out and preventing sand from reaching the shaft surface.<\/p>\n<\/details>\n A7: Yes, our gearboxes come with standard SAE flywheel housings for diesel engines, but we also offer IEC or NEMA flange adapters for electric motor inputs. This is becoming popular for stationary electric dredges used in mining tailings ponds.<\/p>\n<\/details>\n A8: We stand behind our “River-Master” series with a 12-month or 2000-hour warranty. We also offer an extended warranty program if you utilize our recommended synthetic lubricants and oil analysis program to monitor gearbox health.<\/p>\n<\/details>\n A9: Yes, we offer models with integrated hydraulic multi-plate clutches. This allows the operator to engage and disengage the pump from the bridge without stopping the main diesel engine, which is essential for clearing blockages safely.<\/p>\n<\/details>\n A10: To provide an accurate quote, we need the engine power (HP\/kW) and speed (RPM), the required pump speed (RPM), the mounting orientation (horizontal\/vertical), and any existing ratio details. A photo of the existing data plate is also very helpful.<\/p>\n<\/details>\n \u00c9diteur : PXY<\/p>","protected":false},"excerpt":{"rendered":" 1. Technical Specifications: “River-Master” Dredge Gearbox Series Data engineered for Centrifugal Sand & Slurry Pump Drives. Technical Parameter Specification \/ Value Unit \/ Context Input Power Rating 200 – 1500 kW (Diesel\/Electric) Reduction Ratio 1.5:1 to 6.3:1 Single\/Double Stage Output Torque 5,000 – 85,000 Nm Input Speed 1200 – 2100 RPM (Engine Std) Output Speed […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[2302],"tags":[2304],"class_list":["post-1390","post","type-post","status-publish","format-standard","hentry","category-aquaculture-machinery","tag-dredge-pump-gearbox"],"_links":{"self":[{"href":"https:\/\/agricultural-gearbox.net\/fr\/wp-json\/wp\/v2\/posts\/1390","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agricultural-gearbox.net\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/agricultural-gearbox.net\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/agricultural-gearbox.net\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/agricultural-gearbox.net\/fr\/wp-json\/wp\/v2\/comments?post=1390"}],"version-history":[{"count":1,"href":"https:\/\/agricultural-gearbox.net\/fr\/wp-json\/wp\/v2\/posts\/1390\/revisions"}],"predecessor-version":[{"id":1392,"href":"https:\/\/agricultural-gearbox.net\/fr\/wp-json\/wp\/v2\/posts\/1390\/revisions\/1392"}],"wp:attachment":[{"href":"https:\/\/agricultural-gearbox.net\/fr\/wp-json\/wp\/v2\/media?parent=1390"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/agricultural-gearbox.net\/fr\/wp-json\/wp\/v2\/categories?post=1390"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/agricultural-gearbox.net\/fr\/wp-json\/wp\/v2\/tags?post=1390"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}} |
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