Customized Babbitt Alloy Steam Turbine Radial Bearing with Precision Machining and Superior Load-carrying Capacity

Product Overview

The steam turbine radial bearing is a key component that stabilizes high‑speed rotor rotation, suppresses vibration and extends unit service life. It provides support and lubrication to prevent direct contact between rotor and casing, thus avoiding wear and overheating. As a professional manufacturer of steam‑turbine spare parts, our radial bearings are made of premium materials featuring outstanding wear resistance, fatigue resistance and reliability for long‑term stable operation under diverse working conditions.

Application Scenarios

Within steam turbines, radial bearings support rotor journals for smooth high‑speed rotation and bear radial loads from the rotor. Subject to high temperature, high pressure and high rotating speed during service, they demand strict standards for material, machining precision and durability. Our products are widely deployed in thermal‑power, nuclear‑power and industrial drive steam turbines, delivering safe and reliable solutions.

Main Materials

• Babbitt alloy: Good conformability and embedability, ideal for bearing surface.
• Bronze alloy: Satisfactory mechanical strength and self‑lubricating property for medium‑load conditions.
• Steel‑back copper‑base alloy: Combines high strength and superior wear resistance for heavy‑duty service.

Product Types

Core Advantages

• Superior Load‑carrying Capacity

Designed in compliance with API 617, GB/T 13663 and other standards. Capable of sustaining dynamic loads during start‑up, shutdown and variable‑load transients to keep rotor running steadily.

• Excellent Lubrication Performance

Oil grooves and lead‑in chamfers on bearing pads facilitate stable hydrodynamic oil‑film formation, lower friction coefficient, reduce heat generation and improve operating efficiency.

• Precision Machining & Accurate Dimension

Manufactured by CNC grinding machines and verified via profilometer inspection. Tolerances of pad thickness, curvature and flatness are controlled ≤0.02 mm to meet designed assembly clearance.

• Rigorous Quality Control

Each production batch undergoes:

• Ultrasonic Testing (UT) for bonding quality of alloy layer
• Hardness test (HB, HRC)
• Full visual and dimensional inspection
• Material certificate and factory test records available

Custom specifications and materials are acceptable according to drawings, physical samples or unit models.

Typical Installation Positions

• Front and rear bearing housings of steam turbine
• HP / IP / LP rotor supports for single‑cylinder and multi‑cylinder units
• Generator‑end and turbine‑end radial bearings
• Back‑pressure, extraction and condensing steam turbines

Failure Prevention Recommendations

To prolong service life of radial bearings:

• Periodically monitor lube‑oil quality; guard against water ingress and particulate contamination.
• Track vibration trends for early anomaly detection.
• Control temperature‑rise rate during start‑up and shutdown to mitigate thermal shock.
• Inspect pad wear, alloy layer peeling and cracking during overhaul.