齒輪彎曲疲勞彎曲應力計算
齒輪驅動具有良好、結構(gou)緊湊、工作可靠(kao)等特點,隨著齒(chi)(chi)輪(lun)齒(chi)(chi)面(mian)(mian)硬化技術(shu)和齒(chi)(chi)輪(lun)加工技術(shu)的(de)迅速發展,硬齒(chi)(chi)面(mian)(mian)齒(chi)(chi)輪(lun)在齒(chi)(chi)輪(lun)驅動(dong)中(zhong)(zhong)得(de)到了的(de)應用。當(dang)齒(chi)(chi)輪(lun)重復受載后,齒(chi)(chi)根(gen)處就會產生(sheng)疲(pi)(pi)勞裂紋,并逐步擴展,致使輪(lun)齒(chi)(chi)發生(sheng)疲(pi)(pi)勞斷裂。因(yin)此(ci),齒(chi)(chi)輪(lun)彎(wan)(wan)曲疲(pi)(pi)勞試(shi)驗(yan)應用于外的(de)齒(chi)(chi)輪(lun)彎(wan)(wan)曲疲(pi)(pi)勞研(yan)究(jiu)中(zhong)(zhong)。齒(chi)(chi)輪(lun)齒(chi)(chi)根(gen)彎(wan)(wan)曲應力(li)的(de)計(ji)(ji)(ji)算作為齒(chi)(chi)輪(lun)彎(wan)(wan)曲疲(pi)(pi)勞強度試(shi)驗(yan)的(de)主要(yao)內容之(zhi)一,是齒(chi)(chi)輪(lun)驅動(dong)設計(ji)(ji)(ji)中(zhong)(zhong)的(de)關(guan)鍵步驟。在齒(chi)(chi)根(gen)彎(wan)(wan)曲應力(li)研(yan)究(jiu)及試(shi)驗(yan)中(zhong)(zhong),由于對計(ji)(ji)(ji)算公式以及各種符號的(de)物理意義(yi)認識不清,很(hen)可能使計(ji)(ji)(ji)算及試(shi)驗(yan)結果出現錯誤。因(yin)此(ci),準確的(de)計(ji)(ji)(ji)算齒(chi)(chi)根(gen)彎(wan)(wan)曲應力(li)顯得(de)十分重要(yao)。
?根據《GB/T 14230)—93齒(chi)(chi)輪(lun)(lun)(lun)(lun)彎曲疲勞(lao)(lao)強度試(shi)(shi)(shi)(shi)(shi)驗(yan)方法(fa)》,齒(chi)(chi)輪(lun)(lun)(lun)(lun)彎曲疲勞(lao)(lao)試(shi)(shi)(shi)(shi)(shi)驗(yan)有兩種方法(fa):A.試(shi)(shi)(shi)(shi)(shi)驗(yan)法(fa)是(shi)(shi)(shi)將試(shi)(shi)(shi)(shi)(shi)驗(yan)齒(chi)(chi)輪(lun)(lun)(lun)(lun)副安裝在齒(chi)(chi)輪(lun)(lun)(lun)(lun)試(shi)(shi)(shi)(shi)(shi)驗(yan)機上進(jin)行負荷運轉(zhuan)試(shi)(shi)(shi)(shi)(shi)驗(yan);B.試(shi)(shi)(shi)(shi)(shi)驗(yan)法(fa)是(shi)(shi)(shi)在脈動(dong)疲勞(lao)(lao)試(shi)(shi)(shi)(shi)(shi)驗(yan)機上利用專門的夾具對試(shi)(shi)(shi)(shi)(shi)驗(yan)齒(chi)(chi)輪(lun)(lun)(lun)(lun)的齒(chi)(chi)輪(lun)(lun)(lun)(lun)進(jin)行脈動(dong)加載,直(zhi)至齒(chi)(chi)輪(lun)(lun)(lun)(lun)出現彎曲疲勞(lao)(lao)失效或(huo)越出。采用B試(shi)(shi)(shi)(shi)(shi)驗(yan)法(fa)時可(ke)在頻(pin)試(shi)(shi)(shi)(shi)(shi)驗(yan)機上進(jin)行試(shi)(shi)(shi)(shi)(shi)驗(yan),頻(pin)率可(ke)以達到上百赫茲大大縮短(duan)了試(shi)(shi)(shi)(shi)(shi)驗(yan)時間,是(shi)(shi)(shi)目前大多數(shu)齒(chi)(chi)輪(lun)(lun)(lun)(lun)彎曲疲勞(lao)(lao)試(shi)(shi)(shi)(shi)(shi)驗(yan)的選。
齒輪應用
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