Turbine Shaft Bearings support rotating shafts in steam, gas and hydro turbines. Their Babbitt-lined journal surfaces work with the shaft and lubricating oil to support hydrodynamic film formation under suitable operating conditions. Bearing geometry and oil supply features are configured for the specific equipment design.
Bearing Structure & Design Features
Babbitt-Lined Journal Surface
The tin-based Babbitt lining provides a conformable working surface between the bearing and shaft, supporting oil-film lubrication under specified operating conditions.
Hydrodynamic Oil Film
Shaft rotation and the bearing geometry help establish a load-carrying oil film. Film performance depends on rotational speed, load, oil viscosity, supply conditions and bearing clearance.
Oil Supply and Groove Configuration
Oil inlets and grooves are positioned according to the bearing design and lubrication system to support oil distribution across the working surface.
Equipment-Specific Construction
Sleeve or split construction, bore geometry and mounting interfaces are designed to match the turbine housing, shaft dimensions and installation requirements.
Technical Specifications
|
Item |
Specification |
|
Bearing Type |
Radial journal bearing |
|
Load Direction |
Radial |
|
Construction |
Sleeve or split |
|
Lining Material |
Babbitt alloy |
|
Backing Material |
Steel or bronze, subject to design |
|
Lubrication |
Oil lubricated |
|
Shaft Diameter |
Up to 1200 mm, subject to manufacturing capability confirmation |
|
Bearing Clearance |
Determined by shaft dimensions and operating conditions |
|
Oil Groove Design |
Configured to the approved drawing and lubrication requirements |
|
Operating Parameters |
Confirmed through technical review |
Final dimensions and tolerances are based on approved drawings and equipment requirements.
Materials & Babbitt Lining Process
Bearing Base Materials
Steel or bronze backing is selected according to the bearing structure and mechanical requirements.
Babbitt Lining
The substrate is prepared before Babbitt alloy application. Casting methods, including centrifugal casting, are selected according to bearing configuration and manufacturing requirements.
Precision Machining
CNC machining and bore finishing establish the specified geometry and critical dimensions. Oil grooves and lubrication features are machined to the approved design.
Customization & Replacement
Drawing-Based Manufacturing
Bearings can be manufactured to approved drawings covering bore dimensions, bearing clearance, oil grooves, construction and mounting interfaces.
Replacement by Sample
Existing bearings can serve as references for replacement. Worn samples may require additional measurements or original equipment drawings to confirm critical dimensions.
OEM and Non-Standard Orders
Design details and manufacturing feasibility are reviewed before production to confirm compatibility with the intended equipment.
Quality Control
Dimensional Inspection
Bore dimensions, critical geometry and specified clearances are checked against approved drawings.
Babbitt Bonding Verification
The lining bond is evaluated using applicable inspection methods. Ultrasonic testing can be arranged when specified.
Final Inspection
Machined surfaces, bearing geometry and oil grooves are checked against the applicable acceptance requirements before shipment.
Quality Certification & Documentation
Quality Management Certification
Our ISO 9001:2015 certification can be provided for verification. Certificate details should be confirmed against the current valid document.
Inspection Documentation
Dimensional inspection records and applicable Babbitt bonding verification results can be supplied according to the agreed inspection requirements.
FAQ
Q: What information is needed for a quotation?
A: Please provide the bearing drawing or part number, shaft diameter, rotational speed, load, lubrication conditions and order quantity. Equipment model details and reference photos are also helpful.
Q: Can you manufacture replacement turbine shaft bearings?
A: Yes. Drawings or existing samples can be used for replacement assessment. Additional measurements may be required for worn or damaged samples.
Q: What inspection reports are available?
A: Dimensional inspection records and applicable Babbitt bonding verification results can be supplied according to the agreed requirements. Ultrasonic testing is available where specified.
Q: What is the minimum order quantity?
A: MOQ depends on the bearing design, materials and production requirements. Single-piece orders can be considered for suitable configurations.
Q: What is the typical lead time?
A: Lead time depends on drawing approval, material availability, manufacturing complexity and order quantity. The schedule is confirmed after technical review.
Q: How are the bearings packaged for shipment?
A: Bearings are packed to protect machined surfaces and Babbitt linings during handling and transportation. Export packaging can be arranged according to shipping requirements.
Q: Is technical support available after delivery?
A: Technical support is available for installation-related questions and product issues. Drawings, operating conditions and relevant photos may be requested for evaluation.
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