Alfa Laval Corporation Ab

Alfa Laval Corporate Ab

Robert M Sandblom

Jouko Juhani Pitkämäki

Jouko Pitk&auml;m&auml;ki

Carl Peder &Ouml;hlander

Sven-&angst;ke Nilsson

Jouko Pitkämäki

Aksel Kristensen

Karl W Kemi

Alf R Glimenius

Sven-ANGke Nilsson

Gustav T Jansson

Jouko Pitkamaki

A hermetic centrifugal separator includes a centrifuge rotor, which is arranged to rotate around a center axis and includes a casing which defines an inner separation space, a set of separation discs in the inner separation space, two or more channels which connect to the separation space and include one or more inlet channels for supply of a liquid mixture of components to be separated to the separation space and one or more outlet channels for discharge of a component. The separator includes a torque transmitting part around the center axis and fixedly connected to the centrifuge rotor and an outlet seal between the outlet channel and the rotating centrifuge rotor preventing entrainment of unwanted substances. The separator includes a pump arranged to provide pressure to feed the separated liquid through the outlet channel.

Hermetic centrifugal separator with an outlet pumping configuration

In a centrifugal separator for separating a product to a heavy phase and a light phase. The centrifuge rotor encloses a separating space. An inlet channel permits feeding of the product to the separating space. A first outlet channel permits discharge of the heavy phase from the separating space. The second outlet channel permits discharge of the light phase from the separating space. The centrifuge rotor includes a first chamber for collecting the heavy phase, a heavy phase channel, for feeding the heavy phase, and a nozzle member between the heavy phase channel and the first chamber for controlled feeding. The first paring member extends outwardly in the first chamber from the first outlet channel for discharge of the heavy phase. The second paring member extends outwardly in the first chamber.

Centrifugal separator having cleaning channel

In a centrifugal separator a centrifugal rotor is connected to a vertical spindle, which is supported by a frame and journalled in a first bearing and a second bearing. The centrifugal separator is drivable by an electric motor, the stator of the motor being fixed to the frame such that it is radially immovable relative to it, whereas the rotor of the motor is radially movable together with the spindle. The gap between the rotor and the stator of the motor is dimensioned so that it permits the radial movability of the rotor.

Driving device for a centrifugal separator

A device for the supply of a liquid under pressure to a flow passage (,) in a member in a shaft suspension unit (,) of a centrifugal separator, which has a stationary casing (,) and a unit, which is resiliently and oscillation dampingly suspended in the casing (,) by at least one elastical element (,), the member forming a part of the composed unit. To be able to supply liquid to the member in a sample manner with a certain controllable flow which is made sure under overpressure a first supply channel portion (,) is connected to a liquid source (,) for the supply of liquid under pressure extending through the stationary casing (,). To the first supply channel portion (,) there is connected a second supply channel portion (,) extending through the elastical element (,). A third supply channel portion (,) is connected to the second supply channel portion (,), extending through the non-rotatable part of the composed unit and having an outlet opening (,) in the flow passage (,).

Device for the supply of liquid under pressure to an element at a rotating axis

A simple but still effective sealing device to separate two openings (,), which are arranged at a distance from each other in the outer casing (,) of a shaft suspension unit (,), which supports a shaft (,) of a centrifugal separator in a bearing (,), the shaft extending axially through at least one opening (,) into a space surrounding the shaft (,) in the outer casing (,). The sealing device is provided with sealing elements (,), one connected to the outer casing (,) and one connected to the shaft (,), which surround the shaft (,) and divide the space in two departments (,) connected to one opening each (,respectively). The sealing elements form between themselves a narrow gap (,) surrounding the shaft (,), which prevents the flow of gas between the departments (,). One of the sealing elements (,) has a channel (,), which has an opening (,) in a central part of the gap (,), for the supply of a sealing liquid under pressure to the gap (,) in such a way that oil flows from the opening (,) through the gap (,) and out into the two departments (,).

Sealing device for a centrifugal separator

Damping device

A liquid milk product, such as milk or cream, is caused to flow along the surface of a filter at one side thereof from an inlet of the filter to an outlet thereof at a velocity of 0.5 to 20.0 m/sec., the main quantity of the filter pores each having a diameter of 0.2 to 10 .mu.m. At the same time, skim milk is passed through the filter to the other side thereof under a pressure drop of at least 0.2 kp/cm.sup.2 while discharging a cream-enriched product from said outlet, and the greater part of this cream-enriched product is returned from said outlet to the inlet of the filter.

Filtering method for separating skim milk from milk products

A filterable fluid flows under pressure through a filtering passage along one side of the filter, so that there is a substantial pressure drop along the filter area in the flow direction. A fluid flow in this same direction is provided in a filtrate passage extending generally parallel to the opposite side of the filter, so as to create a corresponding pressure drop in the flow direction in the filtrate passage, whereby the pressure difference between both sides of the filter is maintained substantially constant throughout the entire filter area.

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Farsta, Sweden

Robert M Sandblom