Praktiese berekeningsformule en kenmerkende kromme

Kwadalwa ngo 05.09

Praktiese berekeningsformule en kenmerkende kromme

1.7.2 injeniyering yezenzo lokubala formula

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

Hydraulic motor ya formula ya kuhesabu inayotumiwa mara kwa mara na kampuni za uhandisi

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 hwepamusoro pakati peinlet 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 torsie 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 特色曲线

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 nengcindezi 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 kwe-zero, okwenza i-torque yemoto, ukusebenza kahle kwemishini kanye nekhono lokusebenza konke kube ne "dead zone", okusho ukuthi i-torque yangempela, ukusebenza kahle kwemishini kanye nekhono lokusebenza konke kube 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, ikhulisa ngokushesha ngokukhula kwengcindezi, bese yehlisa isivinini, ngakho-ke ukusebenza kahle kuqala ku-zero, futhi kukhona iphuzu eliphezulu. Ngokuqinisekile, i-hydraulic motor kufanele isebenze eduze kwaleli phuzu.

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

(3) I-curve engafani 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 engafani engenamkhawulo 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.

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