What is ISO 31657‑1 about?
ISO 31657‑1 is the first part of a series of documents on multi-lobed and tilting pad journal bearings. ISO 31657‑1 specifies the general principles, assumptions and preconditions for the calculation of multi-lobed and tilting-pad journal bearings using an easy-to-use calculation procedure based on numerous simplifying assumptions. For a reliable evaluation of the results of this calculation method, it is indispensable to consider the physical implications of these assumptions as well as practical experiences for instance from temperature measurements carried out on real machinery under typical operating conditions. Applied in this sense, this document presents a simple way to predict the approximate performance of plain journal bearings for those unable to access more complex and accurate calculation techniques.
The calculation method serves for the design and optimisation of plain bearings, for example, in turbines, compressors, generators, electric motors, gears and pumps. It is restricted to steady-state operation, i.e. in continuous operating states the load according to size and direction and the angular velocity of the rotor are constant.
Unsteady operating states are not recorded. The stiffness and damping coefficients of the plain journal bearings required for the linear vibration and stability investigations are indicated in ISO/TS 31657-2 and ISO/TS 31657-3.
Who is ISO 31657‑1 for?
ISO 31657‑1 on multi-lobed and tilting pad journal bearings is relevant to:
- Manufacturer of multi-lobed and tilting-pad journal bearings
- Suppliers and customers of multi-lobed and tilting-pad journal bearings
- Mechanical engineer
- Mechanical drafters
Why should you use ISO 31657‑1?
Multilobe bearing, tilting pad bearings are designed to transfer high axial loads from rotating shafts with minimum power loss.
ISO 31657‑1 provide information on general principles, assumptions and preconditions, calculation method, load-carrying capacity, frictional power, lubricant flow rate, heat balance, maximum lubricant film temperature – pressure, operating states, further influencing parameters, stiffness and damping coefficients of multi-lobed and tilting pad journal bearings.
As a buyer of ISO 31657‑1, you can be ensured of all the calculations required for designing multi-lobed and tilting pad journal bearings. ISO 31657‑1 helps you in manufacturing high-quality multi-lobed and tilting pad bearings. With the necessary guidance and compliance to ISO 31657‑1, the user can improve the quality and operation of multi-lobed and tilting pad journal bearings
