Leybold Vakuum Gmbh

Oerlikon Leybold Vacuum Gmbh

Oerliken Leybold Vacuum Gmbh

Henkel Ag & Company, Kgaa

Leybold Gmbh

Otto Fuchs Kg

Michael Froitzheim

Heinrich Engländer

Christian Beyer

Roland Blumenthal

Thomas Dreifert

Hartmut Kriehn

Rainer Hölzer

Klaus Rofall

Manfred Behling

Gregor Terlinde

Lothar Brenner

Josef Heppekausen

Dieter Bohry

Gernot Fischer

Thomas Palten

Dieter Sauer

Lars Etschenberg

Manfred Kiefer

Andy Pontolaeng

Joseph Heppekausen

Lutz Hüsemann

Ishan Roth

Heinz Odenthal

Manfred Kieffer

A method for determining the fatigue of the pump rotor of a gas turbopump comprises the following method steps:

Method for determining the fatigue of a pump rotor of a gas turbopump

The invention relates to a process for the coating of objects made of valve metals selected from aluminum, magnesium, titanium, niobium and/or zirconium and their alloys with an oxide ceramic layer formed from the metal which has a thin barrier layer as a boundary layer towards the metal whose surface has been coated with polymers, characterized in that said polymers are introduced into the capillary system of the oxide ceramic layer in the form of dimers or halogenated dimers of general formula I 

Coated articles

The invention relates to a vacuum pump in which the gas bearing is coated with a hard layer, and to a process for preparing such gas bearing of a vacuum pump.

Coating for gas bearing

A mechanical vacuum pump includes a rotor made of a light metal alloy by powder metallurgy. The powder metallurgy increases the resistance of the rotor to heat and creep.

Mechanical kinetic vacuum pump

A mechanical kinetic vacuum pump with a stator (), a rotor () made from an aluminum or magnesium alloy and a rotor () and a bearing shaft (). The shaft () and the rotor () are connected by a shrink- or screw-fit in a secure permanent connection. The rotor () is made by spray forming. The main alloying component in the aluminum or magnesium alloy is silicon which is present in an amount such that the alloy has an expansion coefficient which essentially corresponds to the expansion coefficient of the shaft material.

Mechanical kinetic vacuum pump with rotor and shaft

A vacuum pump has two shafts () and two rotors () which co-operate with each other and which are fixed to the shafts. The rotors are cantilevered on the shafts. The rotors are fixed to the shafts in a manner which is devoid of backlash, even during temperature changes. In order to achieve this, the shafts () are made of a material having a modulus of elasticity which is as high as possible, e.g., steel. The rotors () are made of a material having a density which is as low as possible, e.g., aluminum or a titanium alloy. Structures (; etc.) are provided to ensure that the rotors () are fixed to the shafts () in a manner which is devoid of backlash at all operating temperatures.

Two-shaft vacuum pump

Growing community of inventors

Dormagen, Germany

Michael Froitzheim