ISO 20816-2:2017 is applicable to land-based gas turbines, steam turbines and generators (whether coupled with gas and\/or steam turbines) with power outputs greater than 40 MW, fluid-film bearings and rated speeds of 1 500 r\/min, 1 800 r\/min, 3 000 r\/min or 3 600 r\/min. The criteria provided in ISO 20816-2:2017 can be applied to the vibration of the gas turbine, steam turbine and generator (including synchronizing clutches). ISO 20816-2:2017 establishes provisions for evaluating the severity of the following in-situ<\/i>, broad-band vibration:<\/p>\n
a) structural vibration at all main bearing housings or pedestals measured radial (i.e. transverse) to the shaft axis;<\/p>\n
b) structural vibration at thrust bearing housings measured in the axial direction;<\/p>\n
c) vibration of rotating shafts radial (i.e. transverse) to the shaft axis at, or close to, the main bearings.<\/p>\n
These are in terms of the following:<\/p>\n
– vibration under normal steady-state operating conditions;<\/p>\n
– vibration during other (non-steady-state) conditions when transient changes are taking place, including run up or run down, initial loading and load changes;<\/p>\n
– changes in vibration which can occur during normal steady-state operation.<\/p>\n
ISO 20816-2:2017 is not applicable to the following:<\/p>\n
i) electromagnetic excited vibration with twice line frequency at the generator stator windings, core and housing;<\/p>\n
ii) aero-derivative gas turbines (including gas turbines with dynamic properties similar to those of aero-derivatives);<\/p>\n
NOTE ISO 3977-3 defines aero-derivatives as aircraft propulsion gas generators adapted to drive mechanical, electrical or marine propulsion equipment. Large differences exist between heavy-duty and aero-derivative gas turbines, for example, in casing flexibility, bearing design, rotor-to-stator mass ratio and mounting structure. Different criteria, therefore, apply for these two turbine types.<\/p>\n
iii) steam turbines and\/or generators with outputs less than or equal to 40 MW or with rated speeds other than 1 500 r\/min, 1 800 r\/min, 3 000 r\/min or 3 600 r\/min (although generators seldom fall into this latter category) (see ISO 7919-3 and ISO 10816-3);<\/p>\n
iv) gas turbines with outputs less than or equal to 40 MW or with rated speeds other than 1 500 r\/min, 1 800 r\/min, 3 000 r\/min or 3 600 r\/min (see ISO 7919-3 or ISO 7919-4 and ISO 10816-3 or ISO 10816-4);<\/p>\n
v) the evaluation of combustion vibration but does not preclude monitoring of combustion vibration.<\/p>\n","protected":false},"excerpt":{"rendered":"
Mechanical vibration \u2014 Measurement and evaluation of machine vibration \u2014 Part 2: Land-based gas turbines, steam turbines and generators in excess of 40 MW, with fluid-film bearings and rated speeds of 1 500 r\/min, 1 800 r\/min, 3 000 r\/min and 3 600 r\/min<\/b><\/p>\n\n\n
\n Published By<\/td>\n Publication Date<\/td>\n Number of Pages<\/td>\n<\/tr>\n \n ISO<\/b><\/a><\/td>\n 2017-07<\/td>\n 30<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":604464,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[272,450,532,2634],"product_tag":[],"class_list":{"0":"post-604454","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-17-160","7":"product_cat-27-040","8":"product_cat-29-160-40","9":"product_cat-iso","11":"first","12":"instock","13":"sold-individually","14":"shipping-taxable","15":"purchasable","16":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/604454","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/604464"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=604454"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=604454"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=604454"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}