Praktiese berekeningsformule en kenmerkende kromme

Kwadalwa ngo 05.07

Praktiese berekeningsformule en kenmerkende kromme

1.7.2 injeniyering yezenzo lokubala izibalo

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

Hydraulic motor yeziyo yehuwandu inowanzoshandiswa nemakambani ehunyanzvi

projekti		Ukubala ifomula	Symboliese betekenis
izina	Kampani	Ukubala ifomula	Symboliese betekenis
Theoretiese vloei QT	L/min	Qt=Vn/1000	V -- i-Displacement ye-hydraulic motor, ml / R; N -- umphakathi we-hydraulic motor, R / min; Δ P -- ubugcisa phakathi kokungena nokuphuma kwe-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 iyisikhumbuzo 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 Iphumelelo yangempela ye-Q iyanda ngokwanda kwengcindezi yokusebenza P, kodwa ukusebenza kwevolumu η kuyancipha ngokwanda kwengcindezi yokusebenza P. Ngenxa yokuba khona kokuhlangana kwangaphakathi, ingcindezi yokusebenza 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, ngakho-ke ikhono eliphelele liqala ku-zero, futhi kunephuzu 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 ephezulu, kubalulekile ukudweba i-curve yokusebenza ngaphakathi kwebanga lonke lesivinini nokuqina, 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 ngesivinini n, kanti i-ordinate imele i-torque T ngakolunye uhlangothi nokuqina ngakolunye. I-curve ye-isoefficiency kufanele idwetshwe esithombeni.

(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-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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