Gebr. Becker Gmbh

Leybold Vakuum Gmbh

Leybold Aktiengesellschaft

Oerlikon Leybold Vacuum Gmbh

Rudolf Bahnen

Henryk Waniek

Achim Von Kathen

Ulli Kriebel

André Kunzendorf

Thomas Dreifert

Hartmut Kriehn

Josef Hodapp

Monika Kuhn

Lothar Brenner

Michael Rapp

Denko Popovac

Markus Loebel

Karl-Heinz Ronthaler

Lars Buchholz

Antje Gennat

Hans Josef Burghard

Uwe Drewes

Klaus Rofall

Gunter Knoll

Wolfgang Giebmanns

Markus LÖBEL

Witali Winter

A vacuum pump generates a vacuum, in a suction device, with an air intake device and an air exhaust device, as well as a motor for driving the vacuum pump. The air exhaust device is provided with a discharge valve. The exhaust air is downstream of the discharge valve divided into two partial flows that are respectively associated with a pipe section.

Combination of motor and vacuum pump with an exhaust flow

The invention first relates to an air filter attachment () for a turbomachine, in particular a side channel compressor, comprising a housing, comprising a filter material () arranged in a housing interior, and comprising an inlet () and an outlet () which are formed in the housing, which have a free opening cross section, and through which air is suctioned. The aim of the invention is to advantageously design a turbomachine comprising an air filter attachment. This is achieved in that the housing interior that has the filter material () extends laterally relative to the opening cross section of the inlet () and/or the outlet () in a non-uniform manner and in any case in a direction by a magnitude of 1&#xbd; or more times the dimension from a central axis (M) of the respective opening cross section to a periphery of the opening cross section in the direction. The invention further relates to a turbomachine, in particular a side channel compressor, comprising such an air filter attachment. Additionally, the invention relates to a filter part () consisting of a pleated filter material () or a circumferential filter wall () which is connected to a base part () and which consists of a filter material.

Air filter attachment for side channel compressor

The invention relates to a vacuum pump, in particular a screw pump, having preferably two displacement body shafts (), coupled via a gearing, which drive displacement bodies (), and having an inner recess (), extending in the direction of a geometric axis (A) of the displacement body shaft (), in which a tubular body () extends for conducting cooling fluid while leaving a free space between an inner surface of the recess () and an outer surface of the body (). To provide a vacuum pump which has a configuration having a simple construction and which is effective with regard to cooling power, it is proposed that the body () is in addition secured in a separate cover part () mounted on the suction-side end of the displacement body (), and that the free space is formed, at least in part, directly between the body () and the inner surface of the displacement body () and extends continuously from the cover part () to a securing region of the body () in the displacement body shaft (), in a region of the displacement body shaft () associated with the motor/gearing housing () of the displacement body shaft ().

Vacuum pump

Filter element

Filter housing

Combined compressor and filter housing

Compressor

A two-shaft vacuum pump has a simplified drive motor. The two-shaft vacuum pump has a synchronous motor as a drive motor which motor rotor is permanently excited. Permanently excited motor rotors are sufficiently small and of light weight such that rotor supporting bearings can be omitted. This also eliminates the problems associated with cooling and lubrication of the supporting bearings.

Dual-shaft vacuum pump

A reciprocating piston drive mechanism, especially for a reciprocating piston vacuum pump, includes a cylinder ( ) embodied in a housing ( ). A piston ( ) is moved back and forth in the cylinder by an electromagnetic drive that has an electromagnet ( ) on the stator side and at least one permanent magnet ( ) on the piston side. In order to increase service life of said drive mechanism, permanent magnets ( ) are also provided on the stator side. The piston permanent magnet(s) ( ) and the stator permanent magnets ( ) are configured and disposed in such a way that the piston ( ) is magnetically biased to a substantially central axial position in the idle state.

Rotary piston drive mechanism

A cooled screw vacuum pump has a housing ( ) two rotating systems ( ) consisting each of a screw rotor ( ) and a shaft ( ), a floating device supporting the rotors having, on each shaft, two mutually spaced bearings ( ) and an empty space ( ) arranged in each rotor ( ) open on the bearing side, wherein is respectively located an element cooling the rotor internally. In order to improve cooling it is suggested that the bearing ( ) of the support located on the rotor side, is placed outside the rotor ( ) empty space ( ), such that in said empty space ( ) there is more room available for obtaining efficient cooling.

Cooled screw vacuum pump

A screw vacuum pump ( ) has rotors ( ), bearings ( ), a casing ( ), a suction side ( ), and a delivery side ( ). Each of the rotors includes at least two rotor sections, a suction side rotor section ( ) and a delivery side rotor section ( ). The two rotor sections are separately constructed and joined together in a positive, form-fitting or friction locking manner. The suction side rotor section is preferably larger in diameter and constructed with looser tolerances as compared to the delivery side rotor section. The suction side rotor is preferably of an inexpensive material such as aluminum while the discharge side rotor is preferably constructed of a higher performance material such as stainless steel. The rotor sections are supported on a rotor shaft ( ) into which cooling fluid is injected through a cooling pipe ( ). Cooling fluid from the shaft is also circulated through the bearings and passages in the casing eventually reaching a sump ( ) in preparation for recirculation.

Screw vacuum pump provided with rotors

A process for operating a dry-compression vacuum pump with at least one pump chamber and at least one rotor driven by an electric motor, and to a vacuum pump suitable for this operating process. To reduce operational shutdowns for maintenance purposes without any risk to the pump, it is proposed that application-specific phenomena leading to deviations from the normal operating status or their effects be monitored and, after a predetermined deviation quantity has been attained at which operation of the vacuum pump could be adversely affected in future, steps be taken to remove the causes thereof.

Process for operating a dry-compression vacuum pump as well as a

Apparatus and process for operating a dry-compression vacuum pump

Device for supplying a multi-stage dry-running vacuum pump with inert gas

Growing community of inventors

Roetgen, Germany

Rudolf Bahnen