Products Description

The maintenance free industrial fan in our DCHVLS PMSM range is designed to run for years with no scheduled service calls. Because the permanent-magnet synchronous motor is gearless and direct-driven, there is no gearbox oil to top up, no drive belt to tension or replace, and no coupling to align. The rotor shaft runs on enamel-coated pure copper windings and double-row angular-contact bearings selected for continuous duty, and the original 3D convection cooling structure holds ultra-low temperature rise so the magnets never reach demagnetization temperature. The motor shaft is stepped - larger at the bottom, smaller at the top - as an anti-drop safety feature. With no mechanical transmission linkage between motor and blades, the entire drive has fewer wearing parts and a simple structure that keeps service intervals to a minimum.

A buyer choosing a maintenance-free fan is really buying decades of predictable uptime, and that predictability comes from how the unit is built, not just how it is described. Our in-house R&D team supports the structural design behind every order, reviewing bearing layout, shaft sizing and cooling geometry against your duty cycle before a blade is cut. Because the gearless layout is a fixed platform we control in-house, we can hold the same long-life configuration across repeat orders rather than sourcing a different transmission each time - so the low-maintenance design you approve on the first unit stays consistent on the tenth.

Specifications

Parameter	Specification
Motor type	Gearless PMSM direct drive, no gearbox, no belt
Blade material	Aviation aluminum-magnesium alloy airfoil
Blade diameter	2000–7300 mm
Blade count	5–8
Motor power	0.4–1.8 kW
Power supply	380 V 3-phase / 220 V single-phase, 50/60 Hz
Max speed	55–120 RPM
Net weight	28–128 kg
Cooling structure	Original 3D convection cooling, ultra-low temperature rise
Mounting	Clamped to roof structure beams, ≥ 4.5 m floor height

Applications

Remote or unmanned workshops

with no gearbox oil and no belt to service, the fan keeps running in plants where on-site maintenance crews are limited.

Logistics warehouses running long shifts

the simple gearless drive removes a recurring maintenance task, so facilities teams are not climbing to roof height on a service schedule.

Semi-open production bays

sealed, transmission-free internals tolerate dusty and humid air far better than geared fans with oil-filled gearboxes.

Customization

Manufacture per customer technical drawings or prototypes, with OEM/ODM and private-label support.
Blade diameter 2000–7300 mm and blade count 5–8 to match span and ceiling height.
Motor power selected from 0.4–1.8 kW, wired for 380 V 3-phase or 220 V single-phase at 50/60 Hz.
Roof-beam clamped mounting brackets engineered for beams with at least 4.5 m clearance below.

Packaging & Transportation

Every fan is 100% tested before shipment and packed in fumigation-free plywood wooden cases. We ship on EXW, FOB, DDP or CIF terms, with photo and video progress updates during production.

FAQ

Q1. What is the lead time?

A: Standard products ship in about one week. Custom units also lead in about one week, and our monthly capacity is 1,500–2,000 units, with photo and video updates sent during production.

Q2. How do you handle after-sales support?

A: We provide an installation manual and installation videos, offer video guidance on request, and commit to a 24-hour after-sales response.

Q3. Are samples available?

A: Yes, but samples are chargeable rather than free. Custom sample development takes about one week, and mixed colors or models are allowed.

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