DAOLER® Diamond Friction Shims: High-Reliability Transmission Solution for Marine Shaft Generators

Keywords: Marine Shaft Generator Friction Shims, Diamond Composite Friction Shims, Marine Transmission Preload Shims, DAOLER® High-Wear Resistance Friction Shims, Maritime-Grade Precision Transmission Shims

Page Description: DAOLER® independently developed diamond composite friction shims, designed specifically for marine shaft generators and other maritime transmission scenarios. Featuring high friction coefficient, high and low temperature resistance, and corrosion resistance, they solve the challenges of transmission preload, anti-slip, and anti-loosening under complex marine conditions, making them the preferred domestic alternative to imported high-end friction shims.

1. Maritime Scenario Demand: Strict Requirements for Friction Shims in Marine Shaft Generators

As the core component of a ship’s power system, marine shaft generators operate under extreme conditions including high load impact, salt spray corrosion, wide temperature fluctuations, and continuous vibration, placing far higher performance demands on friction shims than civilian applications:

Maintain stable friction coefficient under high contact pressure to prevent shaft slip and preload attenuation;

Resist salt spray corrosion and temperature cycling in the marine environment to ensure long-term service reliability;

Meet ship-grade precision tolerance requirements without affecting shaft alignment and transmission efficiency;

Possess long service life to reduce maintenance frequency and downtime risks during ocean voyages.

With over a decade of tribology R&D experience, DAOLER® has developed a diamond composite coating friction shim series fully compatible with marine shaft generators and various maritime transmission equipment, providing a stable and reliable preload and anti-slip solution for marine power systems.

2. DAOLER® Core Technology: Independently Controlled Diamond Composite Friction System

1. Material System and Basic Specifications

DAOLER® friction shims use high-carbon steel substrates (meeting marine structural strength standards) with an independently developed electroless nickel-diamond composite coating. Core specifications are as follows:

Substrate Material: Preferred C60/C75 high-carbon steel (compliant with international marine structural material specifications)

Substrate Thickness: Standard 0.10 mm ±0.01 mm (customizable from 0.05–0.5 mm)

Processing Technology: Precision laser cutting or stamping, ensuring dimensional accuracy of ±0.02 mm

Appearance Color: Silver-gray metallic finish, visually consistent with marine transmission metal components

2. Diamond Coating Grades and Performance Matching

To meet the load, speed, and operating condition requirements of different marine shaft generators, DAOLER® offers multi-gradient coating specifications. By adjusting diamond particle size and surface concentration, optimal performance and cost balance are achieved:

表格

Performance Parameter    DFS-G10 Series    DFS-G25 Series    DFS-G35 Series    DFS-G55 Series

Mean Diamond Particle Size    10 μm    25 μm    35 μm    55 μm

Avg. Surface Diamond Concentration    8–16%    8–25%    10–30%    20–60%

Hardness of Nickel-Phosphorus Matrix    400–600 HV 0.025    400–600 HV 0.025    400–600 HV 0.025    400–600 HV 0.025

Coating Thickness    5–9 μm    13–17 μm    14–22 μm    22–30 μm

Total Finished Thickness (incl. Substrate)    0.13 mm ±0.02 mm    0.16 mm ±0.02 mm    0.19 mm ±0.03 mm    0.23 mm ±0.05 mm

Note: All parameters are technical indicators under DAOLER®’s independent R&D system, with no reference to any third-party protected data. All formulas and processes are independent intellectual property achievements.

3. Maritime Scenario Adaptation Performance

Friction Stability: Maintains stable friction coefficient under high contact pressure (>50 MPa) without thermal attenuation or slip, adapting to high-load startup and continuous operation of shaft generators;

Temperature Resistance: Maximum service temperature up to 400°C, covering extreme high-temperature engine room environments and low-temperature polar navigation conditions;

Surface Compatibility: Supports adaptation to mating surfaces of different roughness, with customized selection available based on shaft machining accuracy;

Corrosion Resistance: Nickel-phosphorus composite coating offers excellent salt spray corrosion resistance, passing accelerated marine aging tests and far exceeding the service life of ordinary carbon steel shims.

3. Application Value for Marine Shaft Generators: Cost Reduction, Efficiency Improvement, and Domestic Substitution

1. Core Performance Advantages

Reliable Preload and Anti-Loosening: The high bite characteristic of diamond particles maintains stable preload under continuous marine vibration, eliminating power output fluctuations caused by shaft slip and loosening;

Long Service Life and Low Maintenance: Wear resistance is 3–5 times that of ordinary shims, significantly reducing replacement frequency during ocean voyages and lowering ship operation and maintenance costs;

Precision Transmission Guarantee: Micron-level precision control does not affect shaft alignment and transmission efficiency, ensuring stable and efficient output of the shaft generator.

2. Compliance and Cost Advantages

Independent Control: The entire product series is independently developed and produced by DAOLER®, with no reliance on overseas technology licenses, avoiding supply chain risks;

Maritime Certification Adaptation: Product design meets ship-grade material and performance requirements, and can support customers in completing relevant classification society certification adaptation;

Cost Optimization: Under equivalent performance, procurement costs are 30%–50% lower than similar imported products, and bulk purchases can further reduce material costs for marine power systems.

4. Selection Guide: Matching Different Marine Shaft Generator Operating Conditions

表格

Model Series    Recommended Application Scenario    Compatible Surface Roughness Requirement

DFS-G10    Small/medium marine shaft generators, light-load transmission systems    Rz < 5.0 μm / Ra < 1.0 μm

DFS-G25    Medium-sized cargo/passenger ship shaft generators, medium-load continuous operation scenarios    Rz < 12.5 μm / Ra < 2.5 μm

DFS-G35    Large container/oil tanker shaft generators, high-load impact scenarios    Rz < 17.0 μm / Ra < 3.5 μm

DFS-G55    Ultra-large marine shaft generators, extreme heavy-load/harsh condition scenarios    Rz < 27.5 μm / Ra < 6.3 μm

Note: DAOLER® can provide customized shim specifications and coating schemes based on specific ship type, shaft generator model, and operating conditions, with one-on-one selection support from professional tribology engineers.

Conclusion

Against the backdrop of the global shipping industry’s transition toward efficiency, reliability, and independent control, DAOLER® diamond friction shims, with independent core technology, maritime-grade performance, and stable supply capacity, have become the preferred domestic solution for marine shaft generator transmission systems. We continue to deepen our expertise in tribology, iteratively upgrading products adapted to extreme marine environments, and helping marine power systems achieve more efficient, safer, and more economical operation, contributing to the independent control of core components in China’s shipbuilding industry.

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DAOLER® Diamond Friction Shims for Marine Shaft Generators | Independently developed high-wear resistant coating, multi-gradient specifications adapted to extreme maritime conditions, stable preload and anti-slip, long service life and low maintenance, the preferred domestic alternative for marine transmission systems.