Oerlikon Leybold Vacuum Gmbh

Gebr. Kemper Gmbh & Co. Kg Metallwerke

Leybold Vakuum Gmbh

Oerliken Leybold Vacuum Gmbh

Gebr. Kemper Gmbh + Co. Kg

Roland Blumenthal

Michael Froitzheim

Dieter Bohry

Ralf Adamietz

Tobias Theile

Alexander Vogt

Heinz-Dieter Odendahl

Stefan Fries

Dirk Kalisch

Thomas Palten

Stephan Hundertmark

Manfred Kiefer

Markus Heß

Gerd Hilchenbach

Manfred Kieffer

A valve for a drinking water installation for larger volume flow of cold water, depending on an adjustable or non-adjustable water temperature, having a valve housing with connections to a pipeline and a regulating piston which is movable in the valve housing, coupled to a spindle exposed on the outer side of the valve housing, with a thermal expansion element exposed in the flow path through the valve housing and resting under the pretension of a spring element against the regulating piston, the regulating piston being movable relative to a bore due to the expansion of the expansion element.

Valve for drinking water installation

The present invention relates to a plate heat exchanger system with a plate heat exchanger () comprising an inlet () and an outlet () of a primary circuit (), an inlet () and an outlet () of a secondary circuit (), at least one plate () separating the two circuits in a housing of the plate heat exchanger from each other, and preferably a pipe which connects the primary circuit to a heating device. For improving heat transfer between the primary circuit () and the secondary circuit (), the plate heat exchanger () is according to the invention in the direction of gravity (G) arranged such that the plane (E), in which the plate () is located, is inclined relative to the gravity vector (G) and the horizontal (H).

Plate heat exchanger system

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 present invention relates to a connection fitting for the connection of a ring with at least one consumer to a storey or rising main branch with inlet and outlet openings () which can be connected to the branch and an intervening merge opening () for the ring main which is preceded in the flow direction (S) by a cross-section constriction (). The present invention also relates to a water pipe system with at least one storey or rising main branch to which several ring mains are connected via separation and merge openings and a cross-section constriction provided between the separation and merge openings of the assigned ring main in the branch. The object of the present invention is to specify a connection fitting which leads to improved flow characteristics in the region of the ring main assigned to the connection fitting and to provide a water pipe system which fulfills the practical requirements in an improved manner. With this invention the object is solved by suggesting a connection fitting and a water pipe system of the prior known type, which are characterized in that they comprise means () for varying the passage area of the cross-section constriction (V).

Connection fitting

A high-speed turbomachine includes a magnetic bearing () and a retainer bearing for mounting the rotor. The retainer bearing is embodied as a sliding bearing () and encompasses a bearing shell () at the stator end, a bearing shaft () at the rotor end, and an intermediate bushing () between the bearing shell () and the bearing shaft (). The intermediate bushing () is spaced apart from both the bearing shaft () and the bearing shell () by a circular gap (). The intermediate bushing () is rotatable relative to the bearing shell () and the bearing shaft (). As a result of this design, the sliding bearing () is provided with two pairs of sliding surfaces, onto which all occurring dynamic forces are distributed such that wear is significantly reduced, thus allowing sliding bearings to be used as retainer bearings in a magnetically mounted high-speed turbomachine.

Turbomachine

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 device (), for evacuating a chamber to pressures in the high vacuum range includes a suction-side vacuum pump () and an atmospheric-pressure-side vacuum pump (). The suction-side vacuum pump () is a mechanical kinetic vacuum pump with a rotor () and a stator (). The stator () has a rotationally-symmetrical inner surface which matches the outer rotor geometry. The rotor () in the mechanical kinetic vacuum pump () is provided with a structure () carrying out the gas pumping. Said gas pumping structure comprises webs (), the angle and width of which decrease from the suction side to the pressure side. The gas throughflow is improved. The outer diameter of the rotor () and the inner diameter of the stator () of the suctnion-side pump decrease from the suction side to the pressure side.

Evacuating device

A turbomolecular pump () comprises a stator (), a pump rotor () a motor () for driving the pump rotor and a control device (). The control device () controls the motor output power such that the motor output power does not exceed a permissible maximum motor output power. On the stator side of the turbomolecular pump (), temperature sensors () for measuring the stator temperature are arranged. The control device () comprises a maximum output power detecting device () that determines the permissible maximum motor output power in dependence on the measured stator temperature. Thus, the permissible maximum motor output power is not set to a constant value but always fixed in dependence on the current, measured stator temperature. Thereby, the capacity of the motor can be fully utilized as long as the measured stator temperature lies below a maximum value.

Turbomolecular pump

A friction vacuum pump () has at least one turbomolecular pump stage () with a molecular pump stage () that is subsequently connected on the pressure side (), and with a transition stage () mounted between the turbomolecular pump stage and the molecular pump stage. In order to improve the transition from the turbomolecular zone to the molecular zone, the transition stage has a flow section that is continuously tapered in the tangential by limiting surfaces ().

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Erftstadt, Germany

Roland Blumenthal