After taking into account any feedback, the ISO members formulate their position on the draft standard. Most of the ISO standards for machinery vibration monitoring and analysis are guided by technical committee TC, Mechanical vibration and shock.
TC is comprised of 22 Participating P-member countries and 25 Observer countries. Noteworthy subcommittees include; SC1, Balancing, including balancing machines, SC2, Measurement and evaluation of mechanical vibration and shock as applied to machines, vehicles and structures, and SC5, Condition monitoring and diagnostics of machines. Unfortunately, due to the range of machinery categories and classifications, it may also be the most confusing.
Subsequent parts of each series of documents apply to different classes and types of machinery, and include specific evaluation criteria used to assess vibration severity. Measurement procedures are detailed in Part 1: General Guidelines of each series, including shaft relative, shaft absolute, and pedestal vibration measurements. The scope of the umbrella document is to provide general guidelines for selecting the appropriate vibration standards for a specific machinery classification.
The proposed method includes 2 key evaluation criteria; 1 shaft displacement from the journal centerline, and 2 stiffness ratio of pedestal to bearing which determines the ratio of the shaft relative vibration to the pedestal vibration , as detailed in Figures 1 and 2, below. Conversely, machines using fluid film bearings and supported on relatively soft pedestals, will have a much higher stiffness ratio, and are better suited to shaft vibration measurements.
Table 2, below, shows example dynamic stiffness ratios, and the applicable reference standard. Note that other quantities such as displacement or acceleration and peak values instead of rms values are permitted, but may not easily correlate to criteria based on rms values.
Evaluation criteria to assess vibration severity include both vibration magnitude and changes in vibration magnitude. As shown in Figure 3 and Table 3, below, evaluation zones are defined to permit a qualitative assessment of the vibration, and to provide guidelines on possible actions.
At the time of writing this article, Part 2: Processing, analysis and diagnostics is at the committee draft stage. ISO Condition monitoring and diagnostics of machines — General guidelines sets out guidelines for the general procedures to be considered when setting up a condition monitoring program.
In August, , ISO Condition monitoring and diagnostics of machines — Requirements for training and certification of personnel — Part 2: Vibration condition monitoring and diagnostics received an affirmative vote at the FDIS stage, and was affirmed as an international standard. Certification candidates are required to meet prerequisite education, training, and experience, and successfully pass a qualification examination.
Future parts of the series will include; 1. Part 1: Requirements for certifying bodies and the certification process 2. To specify the magnitude of vibration beyond which further operation of the machine may cause damage.
This is just a selection of the huge variety of vibration standards which exist see here for a complete list of vibration standards. Evaluation des vibrations des machines par mesurages sur les arbres tournants. If you operate or service turbomachinery you should be aware of the most important standards applicable to your machinery.
Frequencies to be expected are usually high ones, as for bursts. Part 1 General guidelines Degree of Equivalence identical The technical committee responsible for the preparation of this standard has reviewed the provisions of following International Standard referred in this adopted standard and has decided that they are acceptable for use in conjunction with this standard:. This website uses cookies to improve your experience while you navigate through the website.
Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are as essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may have an effect on your browsing experience.
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website.
These cookies do not store any personal information. PDF Euts. Search for:. This website uses cookies to improve your experience. A wide variety of published standards describe acceptable vibration limits, including the Use professional pre-built templates to fill in and sign documents online faster. Get access to thousands of forms. USLegal fulfills industry-leading security and compliance standards.
Ensures that a website is free of malware attacks. Highest customer reviews on one of the most highly-trusted product review platforms. TopTenReviews wrote "there is such an extensive range of documents covering so many topics that it is unlikely you would need to look anywhere else". USLegal received the following as compared to 9 other form sites. Iso Pdf. How It Works. Select the Get Form button to begin filling out. Activate the Wizard mode on the top toolbar to get more suggestions.
Fill out each fillable field.
0コメント