Alfa Laval Corporate Ab

Alfa Laval Corporation Ab

Alfa Laval Tumba Ab

Husqvarna Ab

Ingvar Hällgren

Leif Gunnar Larsson

Thomas Eliasson

Peter Franzén

Torgny Lagerstedt

Hans Moberg

Stefan Szepessy

Claes-Göran Carlsson

Rolf Ljungtström

Roland Isaksson

Jan Skoog

Mats-Örjan Pogén

Mats Olsson

Leif Bengtsson

Serge Kup

Thomas Davidsson

Daniel Johansson

Mats-Örjan Pogen

Rolf Ljungtsröm

The invention relates to an apparatus () for purifying gas while bleeding a crank housing, said apparatus () comprising a housing () inside which a separator chamber () is provided, a rotor arrangement with a rotor shaft () that is rotatably mounted in the housing and a centrifugal rotor () located in the separator chamber (), and a fluid driving device () for driving the rotor shaft () by means of a driving fluid, the driving device () being disposed in a driving chamber () that is separated from the separator chamber () by means of a housing partition (), and the rotor shaft () extending through a breakthrough in the housing partition (). In the case of this device, it is provided that a labyrinth-type seal () is provided in the zone of the breakthrough in order to seal the driving chamber () from the separator chamber ().

Apparatus for the purification of gas while bleeding a crank housing

The invention refers to a centrifugal separator comprising a stationary casing defining an inner space, a spindle and a rotating member, which is attached to the spindle and arranged to rotate around an axis of rotation with a rotary speed. The rotating member comprises a number of separating discs which are provided in the inner space. A drive member drives the spindle and the rotating member with said rotary speed. A sensor device senses the rotation of the rotating member in relation to the casing. The sensor device comprises at least one transmitter element which is provided in the inner space on the rotating member and a receiver element which is provided at the casing and arranged to sense the transmitter element. The receiver element is provided on the casing outside the inner space.

Centrifugal separator for cleaning of gas

In an apparatus for cleaning of gases a centrifugal rotor is supported by two bearings, in which it is rotatable about a rotational axis. The two bearings are lubricated by means of an oil mist, which is generated in a space, when oil is sprayed against a turbine wheel supported by the rotor. Whereas the bearing, which is situated nearest said space, is lubricated by oil mist present in the space, the second bearing is lubricated by oil mist being conducted to it through a central channel in the centrifugal rotor.

Apparatus for cleaning of gas

An apparatus for simultaneous cleaning of a liquid and a gas includes a centrifugal rotor delimiting in a casing a separation chamber that is arranged for through flow and cleaning of the liquid. On the outside of the casing separation discs are mounted for rotation with the centrifugal rotor. Between the separation discs there are formed axially extending separation passages formed for through flow and cleaning of the gas.

Apparatus for simultaneous cleaning of a liquid and a gas

A centrifugal separator for cleaning of a gas from solid and/or liquid particles suspended therein, includes a stationary housing and a rotor arranged therein. The rotor at its one axial end has a central inlet for gas to be cleaned and delimits a central space communicating with the inlet. Around the central space a stack of conical separation discs is arranged in the rotor. These discs form between themselves several through flow passages which at their one ends communicate with the central space in the rotor and at their other ends communicate directly with a receiving chamber surrounding the rotor in the stationary housing. The rotor supports several turbine blades, which are arranged in a ring around the central inlet of the rotor, and at least one nozzle is adapted to direct a gaseous driving fluid towards the turbine blades for the rotor rotation.

Centrifugal separator for cleaning of a fluid

In a vehicle adapted to be propelled by means of an internal combustion engine crankcase gases coming from the combustion engine are cleaned by means of a centrifugal separator. The rotor of the centrifugal separator is driven by means of pressurized air delivered by a compressor, e.g. a so called turbo compressor, which is driven by means of the combustion engine. During periods when the compressor delivers pressurized air in an insufficient amount and/or at insufficient pressure the rotor of the centrifugal separator is instead driven by means of pressurized air coming from a container containing so called auxiliary pressurized air. The auxiliary pressurized air may have a substantially larger pressure than the pressurized air normally delivered by the compressor. The combustion engine is used also for accomplishing the overpressure of the auxiliary pressurized air in the container.

Method and a device for cleaning of crankcase gases coming from an internal combustion engine adapted for propelling a means of transportation

Centrifugal separator for cleaning of a gaseous fluid

In a vehicle air is compressed for being used in the brake system of the vehicle, for instance. In the compressor, used for the compression, the air is contaminated with oil and solid particles. In order to be relieved from these particles, before the air is conveyed through a drying filter, the compressed is brought to rotation by means of a rotating member in a centrifugal separator. The rotating member may advantageously include a pile of conical separation discs forming flow passages between each other for the compressed air to be cleaned. By means of an efficient cleaning of the compressed air from particles the life time of the drying filter may be increased.

Method of treating air on board on a vehicle, and a device for use when performing the method

An apparatus for cleaning of crankcase gas coming from an internal combustion engine can be carried by and be releasably coupled to the combustion engine. For this purpose the apparatus comprises an adapter element, which can be connected with the combustion engine, and a housing, which can be releasably coupled to the adapter element and which delimits a separation chamber. The housing supports in the separation chamber a centrifugal rotor that is rotatable about a vertical rotational axis and is arranged for cleaning of the crankcase gas. The centrifugal rotor has a drive shaft extending downwards through a bottom in the separation chamber and into a drive chamber, in which the drive shaft carries a turbine wheel. A nozzle is arranged to spray pressurized lubricating oil against the turbine wheel for rotation thereof and of the centrifugal rotor. The adapter element is intended to abut against the combustion engine by means of an abutment surface, which has a first opening for receiving pressurized lubricating oil from the combustion engine and a second opening for returning to the combustion engine from the drive chamber lubricating oil having been used for driving of the centrifugal rotor. Said first opening communicates through a channel in the adapter element with the nozzle and said second opening communicates through an outlet channel in the adapter element with the drive chamber.

Apparatus for cleaning of crankcase gas

In a reaction-driven centrifugal rotor the interior of its casing is divided into one separation chamber (,) and one outlet chamber (,). The separation chamber (,) has an inlet (,) for pressurized liquid to be treated in the centrifugal rotor, and the outlet chamber (,) has outlets (,) for treated liquid. The outlets (,) extend out through one end wall (,) of the casing from the outlet chamber to the outside of the casing. They are situated at a distance from the rotational axis (R) of the centrifugal rotor and directed in a way such that the centrifugal rotor is subjected to a reaction force in its circumferential direction, when liquid flows out therethrough. An annular partition (,) arranged coaxially with the centrifugal rotor within the casing separates the separation chamber (,) from the outlet chamber (,). However, the two chambers communicate with each other through a space at the radially inner edge of the partition (,). The invention is concerned with liquid entrainment members (,), which are arranged in the outlet chamber (,) and formed in a way such that they impede liquid flow in the circumferential direction of the centrifugal rotor relative to the centrifugal rotor. Preferably, there is at least one liquid entrainment member (,), which in a part of the outlet chamber (,) substantially completely prevents liquid flow relative to the centrifugal rotor in the circumferential direction thereof.

Reaction-driven centrifugal rotor with outlet chamber entrainment members

In a rotor for a centrifugal separator there is delimited at one rotor end a distribution chamber (,) for a pressurized liquid supplied to the rotor for being cleaned from particles, and at the opposite rotor end there are liquid outlets arranged for reaction drive of the rotor. The liquid outlets open on the rotor outside in a liquid free space radially spaced from the rotational axis of the rotor. The separation chamber (,) of the rotor, which is situated between the distribution chamber (,) and the outlets (,), contains arcuate separation discs (,), which are distributed around the rotational axis (,) of the rotor and formed such that a lot of axially extending separation channels are delimited, which have a relatively small through-flow resistance to liquid to be cleaned. The separation channels extend axially from the distribution chamber (,) to a collecting chamber (,). The collecting chamber (,) communicates with an outlet chamber (,) at a radial level in the rotor corresponding to that of the radially innermost parts of the separation discs. Thus, efficient separation can be accomplished and the largest possible part of the pressure of the supplied liquid can be used for the rotation of the rotor.

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Tumba, Sweden

Ingvar Hällgren