【Daily Question No. 305】November 07, 2018
Thread Content
【Daily Question No. 305】November 7, 2018: Briefly explain why blade breakage accidents occur in steam turbines (1) Overloading, causing the blade to break due to exceeding the allowable stress ； (2) The blade breaks due to resonance during operation ； (3) The blade strength is reduced and it breaks due to impacts from mechanical impurities, water erosion, chemical corrosion, and other factors ； (4) The excessively high main steam temperature causes high-temperature creep of the blades, leading to damage ； (5) Water impact, damaged bearings, and excessive shaft displacement can cause the moving and stationary parts to collide and break. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Correct: 3 wealth, Incorrect: 1 wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below
(1) Overloading, causing the blade to break due to exceeding the allowable stress； (2) The blade breaks due to resonance during operation ； (3) The blade strength is reduced and it breaks due to impacts from mechanical impurities, water erosion, chemical corrosion, and other factors ； (4) The excessively high main steam temperature causes high-temperature creep of the blades, leading to damage ； (5) Water impact, damaged bearings, and excessive shaft displacement can cause the moving and stationary parts to collide and break.
(1) The turbine operates under overload, causing the blades to break due to stress exceeding the allowable limit； (2) The frequency of the turbine blades does not meet the requirements, resulting in resonance and breakage during operation, especially under high- and low-frequency operation ； (3) The blades break due to reduced mechanical strength caused by factors such as impact from mechanical impurities, wet steam erosion, and chemical corrosion ； (4) The new steam temperature of the turbine often exceeds the allowable limits, exposing the blades to high temperatures; this reduces the allowable stress of the material or causes high-temperature creep that leads to blade failure.
(1) Overloading, causing the blade to break due to exceeding the allowable stress； (2) The blade breaks due to resonance during operation ； (3) The blade strength is reduced and it breaks due to impacts from mechanical impurities, water erosion, chemical corrosion, and other factors ； (4) The excessively high main steam temperature causes high-temperature creep of the blades, leading to damage ； (5) Water impact, damaged bearings, and excessive shaft displacement can cause the moving and stationary parts to collide and break.
Reasons for blade breakage in steam turbines: (1) The steam turbine operates under overload, causing the blades to exceed their allowable stress and break； (2) The frequency of the turbine blades does not meet the requirements, resulting in resonance and breakage during operation, especially under high- and low-frequency operation ； (3) The blades break due to reduced mechanical strength caused by factors such as impact from mechanical impurities, wet steam erosion, and chemical corrosion ； (4) The new steam temperature of the turbine often exceeds the allowable limits, exposing the blades to high temperatures; this reduces the allowable stress of the material or causes high-temperature creep that leads to blade failure.
(1) Overloading, causing the blade to break due to exceeding the allowable stress； (2) The blade breaks due to resonance during operation ； (3) The blade strength is reduced and it breaks due to impacts from mechanical impurities, water erosion, chemical corrosion, and other factors ； (4) The excessively high main steam temperature causes high-temperature creep of the blades, leading to damage ； (5) Water impact, damaged bearings, and excessive shaft displacement can cause the moving and stationary parts to collide and break.
(1) Overloading, causing the blade to break due to exceeding the allowable stress； (2) The blade breaks due to resonance during operation ； (3) The blade strength is reduced and it breaks due to impacts from mechanical impurities, water erosion, chemical corrosion, and other factors ； (4) The excessively high main steam temperature causes high-temperature creep of the blades, leading to damage ； (5) Water impact, damaged bearings, and excessive shaft displacement can cause the moving and stationary parts to collide and break.
(1) Overloading, causing the blade to break due to exceeding the allowable stress； (2) The blade breaks due to resonance during operation ； (3) The blade strength is reduced and it breaks due to impacts from mechanical impurities, water erosion, chemical corrosion, and other factors ； (4) The excessively high main steam temperature causes high-temperature creep of the blades, leading to damage ； (5) Water impact, damaged bearings, and excessive shaft displacement can cause the moving and stationary parts to collide and break.
(1) The turbine operates under overload, causing the blades to break due to stress exceeding the allowable limit； (2) The frequency of the turbine blades does not meet the requirements, resulting in resonance and breakage during operation, especially under high- and low-frequency operation ； (3) The blades break due to reduced mechanical strength caused by factors such as impact from mechanical impurities, wet steam erosion, and chemical corrosion ； (4) The new steam temperature of the turbine often exceeds the allowable limits, exposing the blades to high temperatures; this reduces the allowable stress of the material or causes high-temperature creep that leads to blade failure.
(1) The turbine operates under overload, causing the blades to break due to stress exceeding the allowable limit； (2) The frequency of the turbine blades does not meet the requirements, resulting in resonance and breakage during operation, especially under high- and low-frequency operation ； (3) The blades break due to reduced mechanical strength caused by factors such as impact from mechanical impurities, wet steam erosion, and chemical corrosion ； (4) The new steam temperature of the turbine often exceeds the allowable limits, exposing the blades to high temperatures; this reduces the allowable stress of the material or causes high-temperature creep that leads to fracture
(1) Overloading, causing the blade to break due to exceeding the allowable stress； (2) The blade breaks due to resonance during operation ； (3) The blade strength is reduced and it breaks due to impacts from mechanical impurities, water erosion, chemical corrosion, and other factors ； (4) The excessively high main steam temperature causes high-temperature creep of the blades, leading to damage ； (5) Water impact, damaged bearings, and excessive shaft displacement can cause the moving and stationary parts to collide and break.