Weigao BQ Pump Drive Transmission Box: Compound Gear & Pump-Specific Adaptation Solution
I. Product Overview
Weigao BQ Pump Drive Transmission Box, covering models BQ126, BQ135, BQ220, BQ230, BQ235, and BQ252, is a specialized transmission device integrating bevel gear-worm compound structure and pump unit exclusive optimization. Tailored for fluid transport scenarios such as chemical pumps, oil pumps, and sludge pumps, this series overcomes the shortcomings of traditional pump transmission boxes such as poor speed ratio matching, easy leakage, and insufficient vibration resistance. Compliant with GB/T 10095-2018 and API 677 standards, with IP65/IP67 graded protection, it features 20CrNiMo alloy gears, high-strength cast iron housing, and dual-channel anti-leakage system. Boasting advantages of pump-specific speed matching, reliable sealing, low vibration, and long service life, it operates stably at -25℃ to +110℃, serving as a core power transmission component for industrial pump systems worldwide.
II. Core Advantages
1. Compound Gear Transmission, Pump-Specific Speed Matching
Adopting bevel gear-worm compound transmission structure, the BQ series realizes precise speed regulation for different pump types, balancing efficiency and load capacity. Gears are crafted from 20CrNiMo alloy steel, undergoing carburizing quenching and five-axis precision grinding, with tooth surface hardness up to HRC 60-64 and roughness ≤Ra 0.03μm. The bevel gear stage ensures stable radial force dispersion, while the worm stage achieves large transmission ratio and self-locking function, preventing pump reverse rotation. Models cover targeted ratios: BQ126/BQ135 (5:1-40:1) for small centrifugal pumps; BQ220/BQ230 (30:1-120:1) for medium-sized screw pumps; BQ235/BQ252 (80:1-200:1) for large sludge pumps. Single-stage efficiency reaches 94%-96%, compound transmission efficiency 88%-92%, with torque density up to 17Nm/cm³, perfectly matching pump start-stop and continuous operation demands.
2. Model-Graded Design, Scenario-Specific Adaptation
The series adopts graded design to match diverse pump specifications and working conditions. Small models (BQ126/BQ135) feature aluminum alloy worm housing, covering power 0.75kW-15kW and rated torque 500Nm-3000Nm, suitable for clean fluid transport. Medium models (BQ220/BQ230) use reinforced cast iron housing with dense ribs, power 11kW-45kW and torque 2500Nm-8000Nm, for viscous fluid transport. Large models (BQ235/BQ252) adopt integral casting housing, power 37kW-110kW and torque 7000Nm-22000Nm, for high-pressure heavy-duty pump systems. All models support flange-mounted direct connection with pump shafts, reducing coaxiality error to ≤0.015mm, and the optimized shaft extension structure adapts to various pump connection interfaces, enhancing integration flexibility.
3. Dual-Channel Anti-Leakage, Complex Environment Adaptation
Targeting fluid transport scenarios, the series adopts dual-channel anti-leakage design to eliminate oil leakage risks. Standard models adopt IP65 protection, combining mechanical seal + labyrinth structure with fluorine rubber oil seals, resisting dust, fluid splashing and light chemical corrosion. Enhanced models upgrade to IP67 with pressure-resistant sealing rings and oil return grooves, adapting to humid, corrosive environments such as chemical plants and offshore platforms. The optimized gear meshing and balanced structure reduce operating noise to ≤55dB (small models) and ≤58dB (large models) at 1m. Low-temperature resistant lubrication ensures stable operation at -25℃ to +110℃, and the housing surface anti-corrosion coating passes 1200-hour salt spray test, extending service life in harsh environments.
4. Pump-Adapted Lubrication, Low Maintenance Cost
The lubrication system is optimized for long-term continuous operation of pumps: small/medium models use fully synthetic worm gear oil (ISO VG 150) for oil bath lubrication, realizing maintenance-free operation within 20000 hours; large models adopt forced circulation lubrication with oil cooler, controlling operating temperature below 75℃. The system is equipped with oil sight glass, temperature sensor and automatic oil replenishment interface, facilitating real-time monitoring and maintenance. The first oil change is recommended after 300 hours of initial operation, and subsequent oil changes every 10000 hours under rated load. The modular structure allows quick replacement of gears and seals without disassembling the pump connection, reducing maintenance downtime by 45%.
III. Typical Application Fields
- Chemical Industry: Corrosive fluid pumps, BQ220/BQ230 with IP67 protection adapting to chemical vapor and fluid leakage risks
- Oil & Gas: Crude oil transfer pumps, BQ235/BQ252 with high torque and pressure-resistant sealing for high-pressure transport
- Water Treatment: Sludge discharge pumps, BQ135/BQ220 with anti-clogging design and stable vibration control
- Pharmaceutical Industry: Clean fluid pumps, BQ126 with food-grade lubricant and seamless sealing meeting hygiene standards
- Mining Industry: Mine water drainage pumps, BQ230/BQ252 with reinforced housing resisting dusty and humid environments
IV. Key Technical Parameters
| Model | Transmission Ratio Range | Rated Torque | Lubrication Mode | Protection Grade |
| BQ126/BQ135 | 5:1-40:1 | 500Nm-3000Nm | Oil Bath Lubrication | IP65 (Optional IP67) |
| BQ220/BQ230 | 30:1-120:1 | 2500Nm-8000Nm | Oil Bath Lubrication | IP65 (Optional IP67) |
| BQ235/BQ252 | 80:1-200:1 | 7000Nm-22000Nm | Forced Circulation Lubrication | IP65 (Optional IP67) |
V. Installation & Maintenance
Select models based on pump type, rated power, and working environment (refer to the specification table). Ensure coaxiality error ≤0.015mm during flange connection, fasten bolts with specified torque (40-100N·m for small models, 90-180N·m for large models) in diagonal sequence. Regularly inspect oil level, sealing performance and temperature data, clean the ventilation cap and oil cooler monthly. Avoid overload operation exceeding 3 times rated torque, and use dedicated worm gear oil to ensure transmission efficiency. Entrust complex maintenance to professional technicians familiar with pump transmission systems.
Weigao BQ Pump Drive Transmission Box adheres to the philosophy of "pump-specific adaptation, reliable sealing, and efficient transmission". Its compound gear structure and anti-leakage design break through traditional transmission boxes' matching and leakage limitations, ensuring reliable operation in fluid transport scenarios. Backed by strict quality control and professional after-sales service, it provides customized transmission solutions for chemical, oil & gas, and water treatment industries, establishing itself as a trusted global partner in industrial pump transmission.
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