1. Special fastening system: anti-loosening screw system
CorTec uses 12.9-grade screws, and the modified screws are made of SCM435 alloy steel, with a minimum tensile strength of 1220Mpa and a hardness of 39~44HRC.
In fact, at the moment the motor starts, the extension rod applies a maximum of 400Mpa. Under such a high pressure, the 8.8-grade screws commonly used by peers cannot guarantee the safe and stable operation of the motor for a long time. Generally, the life of a material is proportional to the square of its strength, which means that the life of a 12.9-grade screw is 2.1 times
2. Redundant load-bearing system: aviation-grade wire rope assembly
The wire rope passes through the central axis of the extension rod, bypasses the upper connector and surrounds the two. It does not need to be tightened during installation;
Screws with a long service life will also be eroded by time. When the screw fails under the long-term shear force, the wire rope plays a key role and firmly grasps the extension rod;
Cortec uses aviation-grade steel wire structure features:
6×36WS+IWR structural steel wire rope (compliant with ISO 2408)
316 stainless steel material, resistant to chloride ion corrosion concentration > 500ppm
Triple protection terminal: cold-pressed casing + mechanical wedge + thermoplastic-sealed rope assembly
3. 5-screw locking mechanism
After our research, we found that most HVLS FANs on the market use a single screw to connect the chassis and the motor shaft. CorTec has an additional 4 screws to firmly grasp the chassis, which is double protection and safer.
4. Anti-fall system: tilt-triggered protection panel
Cortec's anti-fall design: the upper part of the locking mechanism is located above the anti-fall panel, and its diameter exceeds the center circle of the anti-fall panel, so that the chassis connected to the locking mechanism will not be separated from the motor frame. This design has a more complicated assembly process, significantly improved safety, and of course, the cost is also greatly increased, but Cortec's products focus on safety.
5. Closed-loop safety mechanism: self-checking safety ring
The safety ring is essential. When the fan blade is subjected to lateral force and the screws connected to the chassis fail, the safety ring can effectively grab the fan blade to prevent it from falling. Cortec's safety ring function integration:
Physical limit: 8mm high-strength steel ring withstands impact loads of >12kN
Visual warning: photochromic coating (color after damage)
6. Dynamic stress management system: universal joint torque limiter
When the fan rotates, it is necessary to ensure that the rotating surface is level with the ground. If the angle is adjusted only by wire rope, once there is a misalignment, the stress inside the fan will be unbalanced. In the long run, the whole machine is prone to deformation, causing safety accidents. The emergence of universal joints allows us to easily adjust the fan angle.
people Also Ask: Key questions from professional customers
Q: Does the wire rope need to be replaced regularly?
A: Based on ISO 4309 standard, it needs to be replaced immediately when any of the following conditions are detected:
The number of broken wires within 6 days is greater than 5% of the total number of wires
Diameter reduction is greater than 7% of the nominal diameter
Kink deformation or cage distortion
Q: How reliable is the locking mechanism in a humid environment?
A: Designed with IP66 protection level, key components have passed:
2,000-hour endurance test at 85% humidity
720-hour corrosion test in salt spray environment (5% NaCl)
*-30℃ cold start verification*
Q: Can the anti-fall system cope with earthquake conditions?
A: Meet the IBC 2012 seismic requirements:
Successfully passed the 0.6g horizontal acceleration test
Simulated 8-degree seismic table test (displacement ±300mm)
Resonance frequency avoidance design＞3Hz
