Sommario
Viene descritto un nuovo tipo di cuscinetto idrostatico di spinta a doppio effetto alimentato da una sola pompa, il quale, per la sua particolare forma, peraltro semplice, rende possibile la distribuzione di sempre uguali portate di lubrificante nei due recessi.
Il principio di funzionamento che permette tale continua ed automatica regolazione della portata, è basato sul fatto che il fluido attraversi uguali resistenze idrauliche nell'alimentare i due recessi, qualunque sia la posizione reciproca del perno e della sede.
Vengono riportati i risultati che permettono il calcolo dei cuscinetti descritti. Dai risultati si rileva che la loro rigidezza, la loro potenza dissipata ed in definitiva la loro efficienza sono le stesse dei cuscinetti alimentati da due pompe, e che quindi la loro efficienza è superiore a quella dei cuscinetti alimentati da una pompa con due regolatori di portata o a flusso costante, o capillari, o ad orifizio.
Summary
In this paper a new opposed-pad hydrostatic bearing supplied by only one pump is presented, which, because of its special, simple shape, makes possible the distribution of equal flow rates in the two pockets.
The principle, which allows such a continuous, automatic flow regulation, is based on the fact that the fluid passes through equal hydraulic resistences in supplying the two pockets, whatever the relative position of the shaft and of the bearing may be.
Data are presented for calculating these bearings. From data it is derived that the stiffness, pumping power, and consequently efficiency of these bearings are the same of bearings supplyed by two pumps, hence their efficiency is better than that of bearings supplied by one pump with two flow-control valves, or with two capillary or orifice restrictors.
The principle of these self-regulating bearings is applying to other hydrostatic couples.
This is a preview of subscription content, log in via an institution to check access.
Abbreviations
- h :
-
height of the hydraulic resistences
- 2h 0—h :
-
height of the hydraulic resistences
- h 0 :
-
height of the hydraulic resistences forP=0
- K :
-
stiffness of the bearing
- \(K_\gamma \) :
-
reference stiffness
- K′ :
-
\(K_{} K_\gamma \)
- P :
-
load capacity of the bearing
- \(P_\gamma \) :
-
reference load capacity
- P′ :
-
\(P_{} P_\gamma \)
- p :
-
differential pressure
- p 0 :
-
differential supply pressure forb=b 0, and for reference
- \(p_u \) :
-
reference differential supply pressure
- \(\bar p\) :
-
differential supply pressure
- p′ :
-
p/p 0
- \(\bar p\prime _\pi \) :
-
\(\bar p/p_\pi \)
- Q :
-
volume flow rate
- \(Q_\pi \) :
-
reference volume flow rate
- \(Q\prime _\pi \) :
-
\(Q/Q_\pi \)
- R :
-
hydraulic resistence
- r :
-
radius
- r′ :
-
r/r 5
- r′ f :
-
r 2/r 5
- r′ g :
-
r 3/r 5
- r′ u :
-
r 4/r 5=r 2/r 3
- r′ u,opt, :
-
value ofr′ u for which it is\(W\prime _\pi = W\prime _{\pi ,min} \)
- W :
-
pumping power
- \(W_\gamma \) :
-
reference pumping power
- \(W_\pi \) :
-
reference pumping power
- W′ :
-
\(W/W_\gamma \)
- \(W\prime _\pi \) :
-
\(W/W_\pi \)
- \(W\prime _{\pi ,\min } \) :
-
minimum pumping power
- ɛ=(h 0−h)/h 0 :
-
relative displacement shaft-bearing
- μ :
-
viscosity of lubricant
- i :
-
lower
- s :
-
upper
- I:
-
first resistence
- II:
-
second resistence
- 1, 2, 3, 4, 5, 6:
-
position of the radii
- ∂ :
-
recess
References
Bassani R.,fluid Appar. Idraul. Pneum., No. 113, September 1973, p. 43.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Bassani, R. A new opposed-pad hydrostatic bearing: The flow self-regulating bearing. Meccanica 10, 107–113 (1975). https://doi.org/10.1007/BF02314748
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02314748