Welcome to WordPress. This isSolution for the Stability of Friction Coefficient of Hydraulic Turbine Brake Wind Brake Plate
Introduction: Hydroelectric power generation, as a clean energy source, is becoming increasingly popular in the market. The braking system, as a component of hydroelectric turbines, plays an indispensable role in the overall braking effect of the brake system through the use of friction discs (brake blocks). The stability of the friction coefficient is an important factor in ensuring the effectiveness of brake operation.
By adjusting the modification types of phenolic resin and the selection ratio of fibers, a composite material with high resistance to thermal degradation and high strength was designed.
- Premise and basic explanation of formula concept
The general skeleton materials for friction materials include synthetic fibers such as aramid, plant fibers, and mineral fibers; Lubricating materials such as talc, graphite, copper sulfide, etc; Friction element materials such as zircon, friction powder, etc; Filling elements such as coke, mica, steel fiber, brass fiber, etc; Auxiliary elements such as PA, etc. Mix the above materials and bond them with phenolic resin to process them into composite structural profiles, namely friction pads. The required indicators for the friction disc of a general hydraulic power brake are: friction coefficient: 0.30-0.40; Wear rate: ≤ 0.12 × 10-7cm3/Nm; Compressive strength>30MPa; Shear strength>50MPa; Water absorption ≤ 2%.
As a type of multi molecular synthetic fiber, aramid fiber has the characteristics of soft texture, low density, high strength, high modulus, and high temperature resistance; Although fiberglass has a lower cost, it is suitable for cost control; Although wood fibers have strong water absorption characteristics, their temperature resistance is poor; Ceramic fibers have the advantages of light weight, high temperature resistance, good thermal stability, and mechanical vibration resistance. By analyzing the advantages and disadvantages of various fiber properties, short cluster aramid fiber, glass fiber, ceramic fiber, and bamboo fiber are selected.
According to the experimental conclusion, the ratio selected for ratio 2 can bring a more stable friction coefficient curve, and the friction coefficient meets the requirements (0.30-0.40).
- Processing steps
Pre mix short cluster aramid fibers with glass fibers and boron resin (50% boron resin content); Pre mix wooden fibers and ceramic fibers with nylon (30% ceramic resin) and nitrile resin (30% nitrile resin) by heating and pre mixing; Mix the remaining resin and bake at 80 degrees Celsius for 0.5 hours; Incorporate high-speed mixing into the overall mixture and then press it into a dedicated mold for molding.
- Conclusion
By using aramid fibers combined with boron modified resin, nylon modified resin, and nitrile modified resin, and adjusting the reasonable ratio, the friction pad of the water turbine brake can have a more stable friction coefficient. your first post. Edit or delete it, then start writing!
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