isiZulu

Praktiese berekeningsformule en kenmerkende kromme

创建于05.09
Praktiese berekeningsformule en kenmerkende kromme
1.7.2 injeniyering yezenzo lokubala izibalo
Ukuze kube lula ukukhetha, ukusebenzisa nokugcina umshini we-hydraulic, ithebula elilandelayo linikeza ifomula yokubala yomshini we-hydraulic evame ukusetshenziswa kwezobunjiniyela.
Hydraulic motor yeziyo yehuwandu inowanzoshandiswa nemakambani ehunyanzvi
projekti
Ukubala ifomula
Symbolic meaning
izina
Kampani
Theoretiese vloei QT
L/min
Qt=Vn/1000
V -- displacement of hydraulic motor, ml / R;
N -- umphakathi we-hydraulic motor, R / min;
Δ P -- ubugcisa phakathi kokungena nokuphuma kwe-hydraulic motor, MPa
Actual flow Q
Q=qt/ηv=Vn/(1000vη)
Output power Po
kW
Po=△pqη/60
Input power pi
Pi=△pq/60
Theoretiese torsie TT
N·m
Tt=△pV/(2π)
Actual torque T
T=△pVηm/(2π)
Volumetrische Effizienz η V
%
ηv=qt/q
Mechanical efficiency η M
ηm=T/Tt
总效率η
η=ηvηm
1.7.3 iqunzi yezakhiwo
Die charakteristische Kurve des Hydraulikmotors umfasst auch die allgemeine charakteristische Kurve, die vollständige charakteristische Kurve und die dimensionslose charakteristische Kurve. Das Verständnis dieser charakteristischen Kurven ist vorteilhaft für die Charakteranalyse, Entwicklung, Nutzung und Wartung des Hydraulikmotors.
(1) Ijwaya elijwaya ye-hydraulic motor iyisithombe esihlobene phakathi kwezici zokusebenza ezifana nokusebenza kahle, ukuhamba, i-torque kanye nengcindezi yokusebenza P, njengoba kuboniswe esithombeni X. Njengoba kubonakala esithombeni:
① Izi zilinganiso ze-hydraulic pump zihluke ngaphansi kwengcindezi yokusebenza ehlukene.
② Iphumelelo yangempela ye-Q iyanda ngokwanda kwengcindezi yokusebenza ye-P, kodwa ukusebenza kwevolumu η kuncipha ngokwanda kwengcindezi yokusebenza ye-P. Ngenxa kokuba khona kokuphazamiseka kwangaphakathi, ingcindezi yokusebenza ye-P iseduze kwe-zero, okwenza i-torque yemoto, ukusebenza kwemishini kanye nekhono eliphelele kube ne-"dead zone", okusho ukuthi i-torque yangempela, ukusebenza kwemishini kanye nekhono eliphelele konke ku-zero. Kuphela uma ingcindezi yokusebenza ikwenza i-motor ifinyelele ku-torque yokwethula, izoqala ukusebenza futhi ikhiphe i-torque. Ukusebenza kwemishini ye-motor ngu-η. Iqala ku-zero, iyanda ngokushesha ngokwanda kwengcindezi, bese yehlisa isivinini, ngakho-ke ikhono eliphelele liqala ku-zero, futhi kunephuzu eliphezulu. Ngokuqinisekile, i-hydraulic motor kufanele isebenze eduze kwaleli phuzu.
0
(2) Ukuze kubonakale kahle izici zokusebenza ze-hydraulic motor futhi kube lula kubasebenzisi ukuqonda nokukhetha indawo yokusebenza enezinga eliphezulu lokusebenza, kubalulekile ukudweba i-curve yokusebenza ngaphakathi kwayo yonke imikhawulo ye-speed kanye ne-pressure, okuthiwa i-full characteristic curve (noma i-full efficiency characteristic curve noma i-general characteristic curve). Njengoba kuboniswe esithombeni y, i-abscissa ye-full characteristic curve ivamise ukumelwa nge-speed n, kanti i-ordinate imele i-torque T ngakolunye uhlangothi kanye ne-pressure ngakolunye. I-curve ye-isoefficiency kufanele idwetshwe esithombeni.
0
(3) I-curve engxenye engenamkhawulo ubudlelwano phakathi kwezici eziyisisekelo ze-motor kanye ne-variable engenamkhawulo (μ n / AP) (△ P, μ, n yizinkinga zok pressure, i-dynamic viscosity kanye nesivinini se-motor ngokulandelana) ibizwa ngokuthi i-curve engaphandle kwe-dimensionless ye-hydraulic motor, engakwazi temsilisa izinkulungwane ze-curve ezihlukahlukene.
The dimensionless efficiency characteristic curve of hydraulic motor is shown in Figure Z. It can be seen that the volumetric efficiency η of hydraulic motor decreases with the increase of pressure difference △ P, increases with the increase of oil viscosity μ and speed n, and the mechanical efficiency η. The total efficiency η is also a function of μ n / AP.
Shiya imininingwane yakho futhi
sizokuthinta.
Phone
WhatsApp
WeChat