DTYJ60FM001 Induced Draft Fan Side Coupling to Main Shaft

In the maintenance of power plant induced draft (ID) fans, the reliability of the connection between the fan-side coupling and the main shaft is a critical, unavoidable issue. A loose connection or fit deviation can range from causing excessive vibration to leading to coupling wear, main shaft damage, and directly impacting unit operation.

Today, we will detail the connection method of the DTYJ60FM001 Fan-Side Coupling to the main shaft, aligning with the design features of mainstream adjustable blade axial flow ID fans and ensuring compliance with the transmission system stability requirements of GB/T 1236-2017 (Industrial Fans – Performance Testing).

First, it is crucial to recognize that the fan-side coupling connection must simultaneously satisfy three core requirements: Precise Alignment, Stable Torque Transmission, and Anti-Loosening/Anti-Slip. The prevailing solution is a compound connection utilizing "Tapered Interference Fit + Keyway Torque Transmission + Shaft-End Nut Fastening."

The DTYJ60FM001 Fan-Side Coupling is specifically optimized for this solution, guaranteeing connection reliability through superior component precision.

Step 1: Tapered Interference Fit

The hub bore of the DTYJ60FM001 Fan-Side Coupling is manufactured using high-precision CNC machining.Simultaneously, it guarantees the concentricity between the coupling and the main shaft, thereby minimizing vibration sources. This design fully adheres to the precision requirements for transmission components outlined in GB/T 1236-2017, laying the foundation for the subsequent steps.

Step 2: Keyway Torque Transmission

Relying solely on the tapered fit is often insufficient to handle the full torque output from the motor. Both the inner bore of the DTYJ60FM001 Fan-Side Coupling and the corresponding position on the main shaft are machined with standard keyways.

When assembled, after embedding the parallel key, the clearance between the key This allows for efficient torque transmission while preventing damage to the mating surfaces caused by excessive tightness.

Critical Note: Before installation, use a cleaning agent to remove any oil, grease, or burrs from the keyway to ensure the parallel key seats fully and flatly. This is the crucial step in preventing relative rotation between the fan-side coupling and the main shaft.

Step 3: Final Anti-Loosening with Shaft-End Nut

After completing the tapered fit and keyway installation, a specialized hydraulic tool must be used to tighten the shaft-end nut. The flange face of the DTYJ60FM001 is designed with a dedicated nut locating groove to ensure uniform force application during tightening.

Recommendation: Pre-tighten the nut to 85% of its rated bolt torque. This final step eliminates any micro-clearances in the tapered fit, prevents connection loosening caused by vibration during operation, and ultimately ensures the long-term stability of the coupling-to-shaft connection.

Comprehensive Component Support for Auxiliary Equipment Reliability

Choosing the DTYJ60FM001 means selecting a reliable and durable "power joint" for your ID fan, effectively resolving vibrations and failures stemming from coupling quality issues.

Beyond this core product is committed to providing comprehensive spares support for power generation auxiliary equipment. For example, to ensure the stability of the fan bearing housing seal and cooling system, we also supply:

• Bearing Sealing Components: Oil Scraper Ring (TY9111C), Oil Collector Ring (UZ22016), and Seal Ring (HU27452-22G).
• Hydraulic Adjustment System Parts: Disc Springs (UZ22000(DY), UZ22015}$) and Exhaust Gasket
• Condition Monitoring: Dual RTD Thermometer (W1 U236D00(DY)).
• Cooling & Conveying: Cooling Fan (TY8000) and CPMW Scraper II Conveying Component.

Post-Installation Check

Finally, after installation, manually bar the fan to check for smooth rotation of the DTYJ60FM001 Fan-Side Coupling. Upon startup, monitor the vibration levels. Should any sign of loosening appear, prioritize checking the shaft-end nut pre-tightening force and the keyway fit condition.

By selecting the DTYJ60FM001 Fan-Side Coupling and adhering to strict installation procedures, you can ensure the long-term, stable operation of your ID fan transmission system.

HKZX-2025-10-28