| 摘要 |
PCT No. PCT/NO95/00219 Sec. 371 Date May 28, 1997 Sec. 102(e) Date May 28, 1997 PCT Filed Nov. 28, 1995 PCT Pub. No. WO96/17176 PCT Pub. Date Jun. 6, 1996A pressure exchanger for transfer of pressure energy from one fluid flow to another with direct mounting of a rotor in a housing. The rotor has a central supply manifold for lubricating fluid and step-shaped bearing surfaces with reduced gap clearance towards each rotor end. The lubricating medium flows towards a manifold at each end and from there to the low pressure side via the axial gap clearance. During axial movement of the rotor the manifold pressure increases when the gap clearance decreases at one end while the opposite occurs at the other end, resulting in an axially centering force in the gap surfaces. In the same way steps in the radial bearing surfaces generate a centering force, since a radial movement will cause an increased pressure gradient when there is a reduction of the gap clearance and a decreased pressure gradient when there is an increase in the gap clearance. The end pieces also have a curved countersink at each low pressure port which increases the drainage from the manifold. The rotor's ducts may be equipped with curved pressure partition walls. The end pieces have a pressure duct with direct connection to the high pressure port which pressurizes a limited segment of the pressure plate in order to balance deformations. The end pieces' inlet passages are designed with perpendicular flow cross sections in the form of segments of a circle.
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