Patent ID: 9358554
Filing Date: 2016-06-07
CPC Classification: B04B

Claim Text:
1. A hermetic centrifugal separator for centrifuging components, contained in a liquid mixture and having different density, comprising: a rotating centrifuge rotor, which is arranged to rotate around a central axis and comprises a casing which defines an inner separation space; a set of separation discs which are provided in the inner separation space of the centrifuge rotor; at least two channels, which connect to the separation space and comprise at least one inlet channel for supply of the liquid mixture of components to be separated to the separation space and at least one outlet channel for discharge of a component separated during operation from the separation space; a torque transmitting part around the central axis and fixedly connected to the centrifuge rotor adapted to be driven in such a way that the centrifuge rotor is brought to rotate; outlet sealing means arranged to seal between the outlet channel and the rotating centrifuge rotor preventing entrainment of unwanted substances; between said separation space and said outlet sealing means is a pumping means comprising an elongate cylindrical body and having a plurality of legs, each of the legs axially extending from a base towards a terminal end of the cylindrical body, each of the legs has a radially outward and circumferentially curved extension proximate the terminal end, adjacent pairs of the legs defining an axial extending opening therebetween, the cylindrical body defining a first surface proximate the base, the first surface having a first diameter, the cylindrical body having an area of reduced cross section defined by a second diameter, the area of reduced cross section being located between the first surface and the terminal end, the second diameter being of a lesser magnitude than the first diameter, the pumping means being arranged to provide pressure to feed the separated liquid through said outlet channel; and the pumping means is a non-rotating stationary arrangement disposed in a chamber that is in direct fluid communication with the inner separation space such that the separated liquid has rotational energy and so that a portion of the pumping means is adapted to direct the separated liquid inwardly towards the center axis in order to increase the pressure in the outlet channel.