Under prolonged exposure to harsh, high-temperature, and dusty operating conditions, engine explosion-proof cooling fan blade failures often fall into three main categories: material degradation, structural damage, and explosion-proof function failure. These can be broken down into six typical failure types, each directly associated with safety hazards:
To balance engine power, cooling requirements, and explosion-proof scenarios, the key is to establish a three-step matching logic: "Scenario Adaptation - Parameter Calculation - Graded Selection." This avoids both performance redundancy and security vulnerabilities. Specifically, follow these steps:
This question precisely captures the core of explosion-proof fan blade design. While conventional fan blades prioritize heat dissipation efficiency, all design differences in explosion-proof fan blades revolve around eliminating ignition sources. This can be specifically analyzed from two perspectives: material selection and structural design.
The core principle of explosion-proof engine cooling fan blades is to prevent them from igniting explosive mixtures of surrounding flammable gases (such as methane and propane) and combustible dust (such as coal dust and flour) with air, thereby preventing them from igniting or exploding. This is achieved through three key pathways: blocking ignition sources, controlling energy release, and isolating explosive environments. The design logic revolves around eliminating all risk factors that could ignite explosive materials. Specifically, this design approach can be broken down into the following three key aspects, significantly different from conventional fan blades:
