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Tres machinae pumpae — dentata, lamellata, et pistonica — amplectuntur 96% pompam hydraulicam applicationum in machinis mobilibus et industrialibus. Quisque fluxum generat per diversum principium displacementis positivae, et quaelibet habet certum intervallum pressionis et efficentiae ubi praestat ceteris. Electio sola pretii causa aut sola familiaritatis causa neglegit differentiam efficentiae inter 12% et 28%, quae inter pumpam inadvisatam et idoneam ad datam operationem exstat. Haec differentia apparet in consumptione combustibilis, onere systematis refrigerationis, et vita operativa — non in ordine emptionis.
Pumpae dentatae praevalet in mercato ad pretium parvum et pressionem modicam ob causam certam: machinatio dentata externa quattuor partes mobiles habet, nullas tenes rotatorias, et contaminationem patitur quae pumpam lamellarem aut pistonicam in horis paucis perimeret. Pumpa dentata externa oleo ISO VG 46 currente ad nitorem ISO 19/17/14 — qui in instrumentis agrariis sine filtratione subtili communis est — efficiens volumetricam 90–93% ad pressionem 150–200 bar producit et 4 000–8 000 horas durat. Pumpa pistonica in eisdem conditionibus contaminationis in 800–1 500 horis deficit. Pumpae pistonicis nitorem ISO 16/14/11 aut meliorem requirunt — sensibilitas ad contaminationem pretium est quod pro efficiencia volumetrica 96–98,5% et facultate pressionis 350–480 bar solvitur, quae eas in applicationibus altissimae perficientiae irremovibiles facit.
Comparatio Generum Pumparum Hydraulicarum
Genus sentinam |
Efficientia Volumetrica |
Maxima pressio continua |
Requisitum Nitorem Olii |
Optima Applicatio |
Apparatus externi Pump |
90–93% |
200–250 bar |
ISO 19/17/14 — tolerans contaminationem |
Circuits auxiliares, mobiles ad pretium parvum, instrumenta agraria |
Pumpa dentata interna (gerotor) |
91–94% |
200–280 bar |
ISO 18/16/13 — filtratio moderata |
Pumpa ad onerandum, circuitus ad gubernandum et ad lubricandum cum praerogativa fluxus lenis |
Pumpa lamellata aequilibrata |
90–94% |
175–210 bar |
ISO 17/15/12 — oleum mundum requiritur |
Ferramenta machinalia industrialia — sonus infimus, aequalitas fluxus bona |
Pistillus axiali — displacium fixum |
95–97% |
350–450 bar |
ISO 16/14/11 — filtratio subtilis iubetur |
Circuitus altae pressionis cum constanti postulatu fluxus — silvicultura, metallurgia |
Axial piston — variable displacement ( Danfoss H1 / Series 45) |
96–98.5% |
350–480 bar |
ISO 16/14/11 — filtratio subtilis iubetur |
Impulsūs mōbīlēs, sensōrēs oneris multi-actuātōrēs, industriālis praecīsiōnis |
The filtration requirement difference between gear and piston pumps is the dominant service life variable in mixed-fleet operations. Fleets that run piston pumps on the same filtration schedule as gear pumps — 10 μm nominal instead of 10 μm absolute, or 500-hour filter intervals instead of 250-hour — reduce piston pump life by 35–50%. Specifying the pump type and the filtration requirement in the same design step prevents this mismatch. HOVOO supplies pump-type-matched service set sigillorum and filtration guides for Danfoss gear, vane, and piston pump series. Full references at hovooseal.com.
