Praktiese berekeningsformule en kenmerkende kromme

创建于05.07

Praktiese berekeningsformule en kenmerkende kromme

1.7.2 injeniyering yezenzo lokubala formula

Ukuze kube lula ukukhetha, ukusebenzisa nokugcina umshini we-hydraulic, ithebula elilandelayo linikeza ifomula yokubala yomshini we-hydraulic evame ukusetshenziswa kwezobunjiniyela.

Hydraulic motor ya miphato ya kuverenga yomwe imachititsidwa ndi makampani a engineering

projekti		Ukubala ifomula	Symboliese betekenis
izina	Kampani	Ukubala ifomula	Symboliese betekenis
Theoretiese vloei QT	L/min	Qt=Vn/1000	V -- displacement of hydraulic motor, ml / R; N -- umphakathi we-hydraulic motor, R / min; Δ P -- uhuvhu hwekuvhu pakati pe inlet ne outlet ye hydraulic motor, MPa
Actual flow Q	L/min	Q=qt/ηv=Vn/(1000vη)
Output power Po	kW	Po=△pqη/60
Input power pi	kW	Pi=△pq/60
Theoretiese koppel TT	N·m	Tt=△pV/(2π)
Actual torque T	N·m	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 i-curve yechokwadi

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 esihlanganisa ubudlelwano phakathi kwezici zokusebenza ezifana nokusebenza kahle, ukuhamba, i-torque kanye no-pressure yokusebenza P, njengoba kuboniswe esithombeni X. Njengoba kubonakala esithombeni:

① Izi zilinganiso ze-hydraulic pump zihluke ngaphansi kwengcindezi yokusebenza ehlukene.

② Iqhaza lokuhamba Q likhula ngokukhula kwengcindezi yokusebenza P, kodwa ukusebenza kahle kwevolumu η kuncipha ngokukhula kwengcindezi yokusebenza P. Ngenxa yokuba khona kokuhlangana kwangaphakathi, ingcindezi yokusebenza P iseduze kancane, okwenza i-torque yemoto, ukusebenza kahle kwemishini kanye nomjikelezo wokusebenza kahle jikelele kube ne "zona efile", okusho ukuthi i-torque yangempela, ukusebenza kahle kwemishini kanye nomjikelezo wokusebenza kahle jikelele konke kungama-zero. Kuphela uma ingcindezi yokusebenza ikwenza i-motor ifinyelele ku-torque yokwethula, izoqala ukusebenza futhi ikhiphe i-torque. Ukusebenza kahle kwemishini ye-motor ngu-η. Iqala ku-zero, ikhula ngokushesha ngokukhula kwengcindezi, bese yehlisa, ngakho umjikelezo wokusebenza kahle uqala ku-zero, futhi kukhona iphuzu eliphezulu. Ngokuqinisekile, i-hydraulic motor kufanele isebenze eduze kwaleli phuzu.

(2) Ukuze kubonakale kahle izici zokusebenza kwe-hydraulic motor futhi kube lula kubasebenzisi ukuqonda nokukhetha indawo yokusebenza enezinga eliphezulu lokusebenza, kubalulekile ukudweba umjikelezo wezici ngaphakathi kwebanga lonke lokushesha nok pressure, okuthiwa umjikelezo wezici ophelele (noma umjikelezo wezici zokusebenza ophelele noma umjikelezo wezici jikelele). Njengoba kuboniswe esithombeni y, i-abscissa yomjikelezo wezici ophelele ivamise ukumelwa ngokushesha n, kanti i-ordinate imele i-torque T ngakolunye uhlangothi kanye ne-pressure ngakolunye. Umjikelezo we-isoefficiency kufanele udwetshwe esithombeni.

(3) I-curve engxenye engenamkhawulo ubudlelwano phakathi kwezici eziyisisekelo ze-motor kanye nezinguquko ezingekho emkhawulweni (μ n / AP) (△ P, μ, n yizinkinga zok pressure, i-dynamic viscosity kanye nesivinini se-motor ngokulandelana) ibizwa ngokuthi i-curve engaphandle kwemikhawulo ye-hydraulic motor, engakwazi temsiliza 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.

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