Overview
ISO 12130-3:2020 is an international standard developed by ISO that provides essential guide values for the calculation of hydrodynamic plain tilting pad thrust bearings under steady-state conditions. This document serves as Part 3 in the ISO 12130 series and focuses specifically on empirical values and operational limits to support the reliable design and operation of tilting pad thrust bearings as described in ISO 12130-1.
The standard aims to ensure the durability and performance of tilting pad thrust bearings by specifying key parameters to avoid wear, mechanical overloading, and thermal overloading during normal operation. It is important to note that ISO 12130-3:2020 is not applicable to heavily loaded tilting pad thrust bearings but provides valuable guidelines for a wide range of industrial applications.
Key Topics
ISO 12130-3:2020 covers a variety of critical aspects for the calculation and application of tilting pad thrust bearings:
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Guide Values to Avoid Wear
The standard emphasizes the importance of maintaining minimum permissible lubricant film thickness to prevent wear and failure. It includes empirical formulas and tables for lubricant film thickness based on sliding velocity and thrust collar diameter, ensuring adequate lubrication and minimizing mixed lubrication states.
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Mechanical Overloading Limits
The document provides maximum permissible specific bearing load values dependent on bearing material. This ensures the bearing surfaces do not deform or crack, maintaining correct function. For example, guideline values for Pb, Sn, Cu-Pb, and Al-based alloys are specified to prevent mechanical damage.
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Thermal Overloading Guidelines
ISO 12130-3:2020 defines maximum permissible bearing temperatures, considering bearing material and lubrication type. It addresses how temperature impacts material hardness, lubricant viscosity, and bearing life, recommending temperature limits to avoid accelerated wear and lubricant degradation.
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Empirical Data and Calculation Formulas
The standard includes empirical data tables and simple formulas that allow engineers to calculate vital parameters such as minimum lubricant film thickness and maximum loads in practical scenarios.
Applications
ISO 12130-3:2020 is indispensable for mechanical engineers, bearing designers, and maintenance professionals involved in:
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Hydrodynamic thrust bearing design and calculation
Professionals can rely on the guide values to optimize bearing dimensions, material selection, and lubrication regimes for steady-state operation.
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Industrial machinery and rotating equipment
The standard supports reliable performance of thrust bearings in turbines, compressors, pumps, and heavy-duty rotating machinery by helping prevent premature failures.
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Lubrication system specification and maintenance planning
By defining minimum lubricant film thickness and temperature limits, the standard aids in designing effective lubrication systems and establishing maintenance schedules.
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Condition monitoring and fault prevention
Using guide values to avoid wear and overloading enhances reliability and operational safety of machines employing tilting pad thrust bearings.
Related Standards
ISO 12130-3:2020 is part of a comprehensive set of ISO standards on plain bearings:
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ISO 12130-1:2001 - Calculation of tilting pad thrust bearings
The foundational standard describing calculation methods for hydrodynamic tilting pad thrust bearings.
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ISO 4381 - Tin casting alloys for multilayer plain bearings
Specifies materials relevant to bearing manufacturing.
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ISO 4382-1 and ISO 4382-2 - Copper alloys for plain bearings
Define materials commonly used in bearing linings and components.
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ISO 4383 - Multilayer materials for thin-walled plain bearings
Supplements information on bearing materials.
Together, these standards establish a robust framework for the design, material selection, and performance evaluation of hydrodynamic plain tilting pad thrust bearings.
Keywords: ISO 12130-3:2020, plain bearings, hydrodynamic tilting pad thrust bearings, bearing calculation guide values, lubricant film thickness, mechanical overloading limits, thermal overloading guidelines, thrust bearing design, bearing reliability, ISO standards for bearings