ISO 20816-9:2020
Mechanical vibration — Measurement and evaluation of machine vibration — Part 9: Gear units
Mechanical vibration — Measurement and evaluation of machine vibration — Part 9: Gear units
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 19
- Дата публикации:
- 16 июня 2020 г.
- Издание:
- ISO IS 20816 edition 1 version 1
- ICS:
- 17.160
This document specifies requirements for determining and classifying mechanical vibration of individually housed, enclosed, speed increasing or speed reducing gear units. It specifies methods for measuring housing and shaft vibrations, and the types of instrumentation, measurement methods and testing procedures for determining vibration magnitudes. Vibration grades for acceptance are included. Torsional vibration measurements are outside the scope of this document. It applies to a gear unit operating within its design speed, load, temperature and lubrication range for acceptance testing at the manufacturer's facility. By agreement between manufacturer and customer and/or operator, it can be used for guidelines for on-site acceptance testing and for routine operational measurements. This document applies to gear units of nominal power rating from 10 kW to 100 MW and nominal rotational speeds between 30 r/min and 12 000 r/min (0,5 Hz to 200 Hz). This document does not apply to special or auxiliary drive trains, such as integrated gear-driven compressors, pumps, turbines, etc., or gear type clutches used on combined-cycle turbo generators and power take-off gears. The evaluation criteria provided in this document can be applied to the vibration of the main input and output bearings of the gearbox and to the vibration of internal shaft bearings. They can have limited application to the evaluation of the condition of those gears. Specialist techniques for evaluating the condition of gears are outside the scope of this document. This document establishes provisions under normal steady-state operating conditions for evaluating the severity of the following in-situ broad-band vibration: a) structural vibration at all main bearing housings or pedestals measured radially (i.e. transverse) to the shaft axis; b) structural vibration at thrust bearing housings measured in the axial direction; c) vibration of rotating shafts radially (i.e. transverse) to the shaft axis at, or close to, the main bearings; d) structural vibration on the gear casing. NOTE Vibration occurring during non-steady-state conditions (when transient changes are taking place), including run up or run down, initial loading and load changes are outside the scope of this document.
Abstract
Overview
ISO 20816-9:2020 - "Mechanical vibration - Measurement and evaluation of machine vibration - Part 9: Gear units" defines requirements and procedures for measuring and classifying broad‑band mechanical vibration of individually housed, enclosed gear units. The standard covers housing and shaft vibration measurements, instrumentation, measurement methods, test conditions and vibration grades for acceptance. It applies to gear units with nominal power ratings from 10 kW to 100 MW and nominal speeds from 30 r/min to 12 000 r/min. Torsional vibration and transient (run‑up/run‑down) conditions are explicitly outside its scope.
Key topics and technical requirements
- Measurement targets
- Structural (transverse) vibration at main bearing housings/pedestals
- Axial vibration at thrust bearing housings
- Radial vibration of rotating shafts at or near main bearings
- Structural vibration on the gear casing
- Instrumentation and accuracy
- Defines types of sensors and systems for shaft and housing measurements, measurement frequency range, permissible errors and calibration requirements.
- Measurement methods & procedures
- Guidance for manufacturer shop acceptance tests and, by agreement, for on‑site acceptance or routine operational checks.
- Emphasis on minimizing system effects (driver, driven machines, mounts) during factory tests.
- Evaluation criteria
- Uses broad‑band vibration magnitudes and evaluation zones (A to D) with associated acceptance grades.
- Provides requirements for test reporting: operating data, test arrangement, instruments used, measurements and acceptance decisions.
- Scope limits
- Not intended for special auxiliary drivetrains (integrated gear‑driven compressors/pumps/turbines), gear clutches for combined‑cycle generators, or specialist gear‑condition diagnostics (narrow‑band spectral techniques).
Practical applications - who uses it
- Gearbox manufacturers - factory acceptance testing and verification of delivered units.
- OEMs and systems integrators - to specify vibration acceptance criteria in procurement and design review.
- Condition monitoring and reliability engineers - baseline and routine vibration checks of gear units under steady‑state operating conditions.
- Maintenance and commissioning teams - on‑site acceptance tests and troubleshooting guidance (when agreed with manufacturer).
- Test laboratories - standardized methods for housing/shaft vibration measurement and reporting.
Related standards
- ISO 20816-1 (general vibration evaluation requirements)
- ISO 13373 series (vibration condition monitoring and diagnostics)
- ISO 2041 (vibration vocabulary)
- ISO 2954 (instrument requirements)
- ISO 10817-1 (rotating shaft vibration measuring systems)
ISO 20816-9 is a practical reference for establishing consistent, comparable vibration acceptance testing and supports better gearbox reliability, commissioning and contractual clarity.
Технические детали
- Технический комитет
- ISO/TC 108/SC 2 - Measurement and evaluation of mechanical vibration and shock as applied to machines, vehicles and structures
- SKU
- ISO 20816-9:2020
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