| 摘要 |
<p>A pressure exchanger for transfer of pressure energy from one fluid flow to another with direct mounting of a rotor (10) in a housing (2). The rotor (10) has a central supply manifold (22) for lubricating fluid and step-shaped bearing surfaces with reduced gap clearance towards each rotor end. The lubricating medium flows towards a manifold (11) 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 (23) 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 (1, 21) also have a curved countersink (17) at each low pressure port which increases the drainage from the manifold (11). The rotor's ducts are preferably equipped with curved pressure partition walls (24). The end pieces (1, 21) have a pressure duct (14) with direct connection to the high pressure port (15) which pressurizes a limited segment of the pressure plate (13) in order to balance deformations. The end pieces' inlet passages (5, 6, 7, 8) are designed to as great an extent as possible with perpendicular flow cross sections in the form of segments of a circle.</p> |
