Weigao ZQH Cylindrical Gear Decelerators: Arc Tooth Meshing & Explosion-Proof Solution
I. Product Overview
Weigao ZQH Cylindrical Gear Decelerators are heavy-duty reliable transmission devices integrating arc cylindrical gear meshing and explosion-proof structural design. As an upgraded version of traditional ZQ series, this line covers single-stage, two-stage and three-stage models with graded center distances, tailored for hazardous and heavy-load industrial scenarios such as chemical processing, oilfield exploitation, and coal mining. It overcomes the shortcomings of traditional cylindrical gear reducers such as poor wear resistance, low impact capacity, and inability to adapt to explosive environments. Compliant with GB/T 10095-2018 and ATEX explosion-proof standards, with IP65/IP66 explosion-proof protection, it features 20CrMnTi arc gears, reinforced cast iron housing, and anti-leakage lubrication system. Boasting advantages of stable arc meshing, explosion-proof safety, strong load capacity, and easy maintenance, it operates stably at -20℃ to +110℃, serving as a core component for hazardous industrial transmission worldwide.
II. Core Advantages
1. Arc Tooth Profile Meshing, Stable Heavy-Load Transmission
Adopting specialized arc cylindrical gear design, the ZQH series realizes continuous line contact meshing, significantly improving load-bearing capacity compared with involute gears. Gears undergo carburizing quenching, precision grinding, and arc profile optimization, with tooth surface hardness up to HRC 60-64 and roughness ≤Ra 0.04μm. The arc tooth structure increases meshing contact area by 40%, reducing tooth surface pressure and enhancing anti-pitting and anti-wear performance by 2.5 times. Single-stage transmission efficiency reaches 94%-96%, two-stage efficiency 92%-94%, and three-stage efficiency 90%-92%, with torque density up to 16Nm/cm³. The optimized tooth backlash control (≤8arcmin for standard grade, ≤4arcmin for precision grade) ensures stable transmission, enabling the units to withstand 4 times rated load instantaneous impact, suitable for intermittent heavy-load operation.
2. Graded Center Distance Design, Scenario-Specific Adaptation
The series adopts graded center distance design (250mm-650mm) to match diverse load and speed requirements. Single-stage models (ratio 3.5:1-12:1) cover power 5.5kW-110kW and rated torque 1500Nm-22000Nm, suitable for high-speed heavy-load scenarios. Two-stage models (ratio 14:1-144:1) cover power 7.5kW-160kW and torque 3000Nm-35000Nm, for medium-speed industrial applications. Three-stage models (ratio 168:1-1728:1) cover power 15kW-200kW and torque 8000Nm-50000Nm, for ultra-low-speed heavy-duty tasks. It supports multiple assembly types (foot-mounted, flange-mounted, gear shaft end output) and is compatible with explosion-proof motors, forming an integrated "motor+reducer" system. The rigid cast iron housing with optimized rib layout enhances torsional rigidity by 30%, ensuring stable operation under extreme loads.
3. Explosion-Proof Structural Design, Safe Hazardous Operation
Targeting hazardous environments, the series adopts full explosion-proof design certified by ATEX and CQ standards. Standard models adopt IP65 explosion-proof protection, with flameproof joint design and anti-static sealing material to prevent explosive gas intrusion. Enhanced models upgrade to IP66, adding stainless steel pressure-resistant cover and corrosion-resistant coating, suitable for coastal oilfields and chemical plants with corrosive vapor. The optimized gear meshing design minimizes friction sparks, and the housing adopts pressure relief structure to release internal pressure in case of emergency. Operating noise is controlled within ≤62dB (single-stage) and ≤65dB (multi-stage) at 1m, meeting industrial noise standards. Low-temperature resistant and high-temperature adaptive lubrication ensures stable operation at -20℃ to +110℃.
4. Anti-Leakage Lubrication System, Low Maintenance Cost
The lubrication system adopts explosion-proof-compatible extreme pressure gear oil (ISO VG 320) with circulating lubrication design, equipped with oil cooler and online oil quality sensor for real-time monitoring. The anti-leakage structure (double mechanical seal + oil return groove) prevents oil leakage in hazardous environments, avoiding safety hazards. The first oil change is recommended after 200 hours of initial operation, and subsequent oil changes every 8000 hours under rated load. The modular structure allows quick disassembly of gear sets and bearings, with standardized arc gear accessories ensuring consistent meshing precision after overhaul. Maintenance time is reduced by 35% compared with traditional cylindrical gear reducers, lowering overall operation costs.
III. Typical Application Fields
- Chemical Industry: Chlor-alkali project agitators, corrosive liquid conveyors, explosion-proof design ensuring safe operation in flammable environments
- Oilfield Exploitation: Oil well pumping units, offshore drilling equipment, corrosion-resistant and pressure-resistant adapting to marine and oil-rich environments
- Coal Mining: Conveyor systems, coal mill drives, strong impact resistance adapting to dusty and heavy-load conditions
- Metallurgy Industry: Steel mill roller tables, ore screening equipment, high torque capacity matching continuous production demands
- Pharmaceutical Industry: Explosion-proof mixing equipment, clean production compatibility with anti-leakage design
IV. Key Technical Parameters
| Model Series | Transmission Ratio Range | Rated Torque | Lubrication Mode | Protection Grade |
| Single-Stage | 3.5:1-12:1 | 1500Nm-22000Nm | Circulating Oil Lubrication | IP65 (Optional IP66) |
| Two-Stage | 14:1-144:1 | 3000Nm-35000Nm | Circulating Oil Lubrication (With Cooler) | IP65 (Optional IP66) |
| Three-Stage | 168:1-1728:1 | 8000Nm-50000Nm | Circulating Oil Lubrication (With Cooler) | IP65 (Optional IP66) |
V. Installation & Maintenance
Select models based on center distance, transmission ratio, and explosion-proof level (refer to the specification table). Ensure coaxiality error ≤0.02mm during installation, fasten bolts with specified torque (80-150N·m for single-stage, 120-200N·m for multi-stage) in diagonal sequence. Keep the explosion-proof joints clean and intact, avoiding modification of the flameproof structure. Regularly inspect oil quality, sealing performance, and explosion-proof components, calibrate gear backlash every 12 months. Avoid overload operation exceeding 4 times rated torque, and entrust maintenance to professional technicians with explosion-proof equipment operation qualifications.
Weigao ZQH Cylindrical Gear Decelerators adhere to the philosophy of "safe priority, heavy-load reliability, and durable operation". Its arc tooth meshing and explosion-proof structural design break through traditional reducers' safety and load limitations, ensuring reliable operation in hazardous industrial scenarios. Backed by strict quality control and professional after-sales service, it provides safe and efficient transmission solutions for chemical, oilfield, and mining industries, establishing itself as a trusted global partner in hazardous environment transmission.
Download
