Descrição
EP-NRV-E150 — Shaft-Input Aluminium Worm Gearbox with Tail Output Shaft
Technical Specifications — EP-NRV-E150
| Parâmetro | Valor |
|---|---|
| Série | NRV-E (Eixo de entrada sólido, sem flange, eixo de saída com rotação helicoidal) |
| Distância do centro | 150 mm |
| Taxas de redução | 5, 7.5, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100 |
| Potência de entrada nominal | Up to 15 kW |
| Faixa de velocidade de saída | 14 a 280 rpm (com entrada de 1400 rpm) |
| Torque máximo de saída | 16,508 N·m |
| Configuração de entrada | Eixo de entrada maciço (sem flange IEC) + eixo de saída helicoidal com rotação sem-fim |
| Eixo de entrada | entrada de eixo maciço com chaveta |
| Eixo de saída da cauda | Direção do parafuso sem-fim (coaxial com o eixo do parafuso sem-fim, extremidade oposta) |
| Material de construção | Liga de alumínio fundido |
| Material da roda sem-fim | Bronze fosforoso |
| Material do eixo sem-fim | Aço liga 20CrMnTi, cementado, retificado com precisão |
| Diâmetro do furo de saída | 50 mm H7 with keyway |
| Lubrificação | Óleo de engrenagem ISO VG 220 (adicionado de fábrica) |
| Posições de montagem | B3, B6, B7, B8, V5, V6 |
| Classe de proteção | IP54 |
| Temperatura ambiente | -10°C a +40°C |
NRV-E150 Performance Table (15 kW / 1400 r/min)
| Razão (i) | Velocidade de saída (rpm) | Torque de saída (N·m) | Fator de serviço (fs) |
|---|---|---|---|
| 7.5 | 187 | 6,962 | 1.7 |
| 10 | 140 | 7,663 | 1.3 |
| 15 | 93 | 8,771 | 0.9 |
| 20 | 70 | 9,654 | 1.0 |
| 25 | 56 | 10,400 | 0.8 |
| 30 | 47 | 11,051 | 1.3 |
| 40 | 35 | 12,163 | 1.3 |
| 50 | 28 | 13,103 | 1.0 |
| 60 | 23 | 13,924 | 0.8 |
| 80 | 18 | 15,325 | 1.0 |
| 100 | 14 | 16,508 | 0.8 |
✅ Principais funcionalidades e benefícios exclusivos
🔗 Eixo de saída com rotação helicoidal — O principal diferencial
The defining feature of the NRV-E150 is its additional tail output shaft that extends in the same direction as the worm shaft axis. This second output enables simultaneous drive of two independent loads from a single gearbox — a primary application drive via the main output bore and a secondary auxiliary drive (encoder, tachometer, small pump, or fan) via the tail shaft.
★ 15 kW Chain + Maximum Encoder Output
The NRV-E150 is the flagship shaft-input worm gearbox with tail shaft, accepting 15 kW chain or belt input while providing the highest radial load capacity (18,000 N) and tail shaft output in the NRV-E series.
◯ Same Torque as Standard NRV150
The NRV-E150 delivers identical maximum output torque (16,508 N·m) to the standard NRV150, confirming that the tail shaft adds zero performance penalty on the main output. The tail shaft is driven directly off the worm shaft end, not the output stage.
🅆 Pronto para Encoder e Feedback
O eixo de saída traseiro fornece um ponto de conexão direta para encoders rotativos, tacogeradores e geradores de pulsos que monitoram a velocidade do eixo sem-fim em sistemas de controle de movimento de circuito fechado, eliminando suportes de encoder externos e componentes de acoplamento.
🚫 IP54 — Integridade com Vedação Dupla
Tanto o furo de saída principal quanto a saída do eixo de cauda são vedados com vedações labiais de contato duplo, mantendo a proteção IP54 em todas as orientações de montagem, sem vazamento de óleo em nenhuma das interfaces do eixo.
🏭 Cenários de Aplicação
🚢 Port Crane Hoist with Encoder
Flagship NMRV-E150 worm gearbox for heavy port crane hoist chain drives where the tail shaft mounts a high-resolution encoder providing precise hoist position feedback to the crane management system.
📥 Bulk Conveyor SCADA Monitoring
Maximum-torque worm gear reducer with tail output shaft for bulk material handling conveyor head-end drives where the tail shaft speed signal monitors tonnage throughput in real time.
⚙ Large Chemical Plant DCS Integration
Flagship aluminium worm gearbox with tail shaft for large polymer reactor agitator drives where the tail encoder feeds into the plant DCS providing real-time agitator speed verification.
💧 Primary Treatment Monitoring
NMRV-E150 worm gearbox for large-diameter primary clarifier rake drives where the tail shaft pulse counter provides the water authority operations centre with continuous rake-rotation confirmation.
🔎 Guia de Seleção
Worked Example — Port Throughput Tracking
Required: NRV-E150 at i=80, chain-driven from 15 kW diesel engine, tail shaft to tonnage tracking encoder. Output speed = 18 r/min, torque = 15,325 N·m. Tail shaft: 360 PPR pulse encoder, 50 mm bore. ✅ NRV-E150-80 selected.
⚖ NRV-E150 vs Standard NRV150
| Recurso | EP-NRV-E150 (with Tail Shaft) | EP-NRV150 (Standard) |
|---|---|---|
| Eixo de saída da cauda | ✅ Sim — direção da minhoca | Não |
| Montagem do codificador/feedback | Diretamente no eixo da cauda | Requer suporte externo |
| Acionamento de carga dupla | Sim — principal + cauda | Não — apenas uma saída |
| Torque de saída principal | 16,508 N·m | 16,508 N·m |
| Dimensões da Habitação | Ligeiramente mais comprido (protrusão da haste caudal) | Comprimento padrão |
| Entrada do eixo | Sim — eixo com chaveta maciça | Sim — eixo com chaveta maciça |
NRV-E150 Main Output Shaft Dimensions
| G1 (mm) | K1 (mm) | L/DZ (mm) | L1/SZ (mm) | b2 (mm) | d h6 (mm) | Chaveta |
|---|---|---|---|---|---|---|
| 200 | 187 | 297 | 374 | 14 | 50 | M16 |
❓ Perguntas Frequentes
What is the tail output shaft on the EP-NRV-E150 and how is it different from the main output?
The tail shaft on the NRV-E150 exits the housing in the worm-direction axis (opposite end of the worm shaft), while the main output bore is perpendicular (90 degrees) to the worm axis. The tail shaft is driven off the worm shaft end and is used for encoder mounting, tachometer connection, or light auxiliary drive, while the main output delivers the full 16,508 N·m load torque.
Does the tail shaft reduce the main output torque of the NRV-E150?
No. The tail shaft draws only the small torque needed for its connected device. The main output retains the full 16,508 N·m rating, identical to the standard NRV150.
What is the input shaft specification for the NRV-E150?
The NRV-E150 has a solid keyed input shaft (no IEC flange). The shaft diameter matches the equivalent NMRV150 bore input diameter. It accepts chain sprockets, belt pulleys, and rigid couplings. A bilateral (double-ended) input shaft is standard; single-end configuration available on request.
What encoder types can be mounted on the NRV-E150 tail shaft?
Any standard keyed rotary encoder with the matching bore diameter can be mounted on the NRV-E150 tail shaft: incremental (5V–24V, 100–10,000 PPR), SSI absolute, or resolver-type. Confirm the encoder bore size and keyway before ordering. The tail shaft key dimensions match the catalogue DZ shaft specification for NMRV-E150.
Can the NRV-E150 be used for closed-loop speed control in a chain-driven system?
Yes. The NRV-E150 is the ideal solution for chain-driven systems requiring closed-loop speed feedback. The chain drives the solid input shaft; the main output drives the load; and the tail shaft mounts an encoder that feeds speed/position data back to the controller. This eliminates the need for a separate encoder mounting bracket or a second independent encoder drive arrangement.
⭐ Avaliações de clientes
★★★★★
“Our port grain conveyor head-end uses NRV-E150 chain-driven from our central diesel engine. The tail-shaft high-resolution encoder feeds our terminal tonnage tracking system with belt-speed data for automatic throughput calculation. Extremely reliable after 16 months.”
Tony V. — Terminal Engineer, Grain Export Port 🇦🇺 Australia (WA)
★★★★★
“We use four NRV-E150 units on our offshore crane hoist chain drives. The tail-shaft encoders provide hoist position feedback to our crane management system. The stainless shaft option eliminated corrosion that affected our previous cast-iron reducer encoders within 12 months.”
Anders L. — Mechanical Engineer, Offshore Platform 🇳🇴 Norway
★★★★☆
“The NRV-E150 drives our primary clarifier rake chain via diesel engine. The tail-shaft pulse counter confirms rake rotation to our water authority SCADA and automatically triggers a maintenance alert if rake speed drops below the design value.”
Sarah M. — Water Infrastructure Engineer, City Authority 🇦🇺 Australia (QLD)
⚙ Acessórios e Produtos Compatíveis
⚡ Motores IEC (B5/B14)
Motores CA padrão com flange IEC compatível. Versões para inversores VFD disponíveis para controle de velocidade variável.
🔗 Kits de Eixo de Saída
Simples sólido (DZ), duplo (SZ), flange de saída (F), flange oco (FL) — todos com tolerância H7/h6 e rasgos de chaveta padrão.
🔨 Braços e suportes de torque
Braços de reação de torque em aço para configurações de montagem em eixo; placas de montagem com pés para orientações B3/B6.
🔒 Kits de Vedação e Respiro
Kits de vedação labial de reposição, bujões de respiro ventilados e bujões de drenagem magnéticos para intervalos de manutenção prolongados.
Enquire About EP-NRV-E150
The NRV-E150 is our flagship shaft-input instrumented worm gearbox. Our engineers will confirm the chain drive specification, radial load, and encoder bore for your application.
O EP-NRV-E150 aluminium worm gearbox combines a solid shaft input (no IEC flange) with an additional worm-direction tail output shaft. Centre distance 150 mm, ratios 5 to 100, input power up to 15 kW, max output torque 16,508 N·m. The tail shaft enables simultaneous encoder feedback, safety interlock monitoring, or auxiliary drive — the ideal instrumented shaft-input worm gearbox for chain-driven closed-loop agricultural, industrial, and mining drive systems.
