Agilent Technologies, Inc.

Agilent Technologies Italia S.p.a.

Vincenzo Pandolfo

Carmelo Quartarone

Silvio Giors

Aldo Crisi

Luca Bonmassar

Gianluca Buccheri

Alessandro Follo

In a vibration damper of a turbomolecular vacuum pump, a vacuum tightness function and a vibration damping function are both performed by one ore more toroidal rings made of an elastic material. The elastic rings assume a resting configuration while the vacuum pump is not operating and the damper is at atmospheric pressure, and they assume a compressed configuration while the vacuum pump is operating and the damper is under vacuum conditions. In the compressed configuration, the elastic rings are deformed due to a compression force. This deformation of the elastic rings prevents metal-to-metal contact between the vacuum pump and a vacuum chamber to which the pump is connected through the damper.

Vibration damper for vacuum pumps

In a vibration damper of a turbomolecular vacuum pump, a vacuum tightness function and a vibration damping function are both performed by one or more toroidal rings made of an elastic material. The elastic rings assume a resting configuration while the vacuum pump is not operating and the damper is at atmospheric pressure, and they assume a compressed configuration while the vacuum pump is operating and the damper is under vacuum conditions. In the compressed configuration, the elastic rings are deformed due to a compression force. This deformation of the elastic rings prevents metal-to-metal contact between the vacuum pump and a vacuum chamber to which the pump is connected through the damper.

A support for a rolling bearing of the kind equipped with an outer rotating ring for a rotary vacuum pump, the support comprising an inner portion that can be associated with the rotating ring, a fastening outer portion and a connecting portion, interposed between the inner and outer portions, wherein the connecting portion is a frusto-conical resilient element.

Support for rolling bearing

A rotor assembly for rotary vacuum pumps has improved mechanical characteristics and low manufacturing cost due to a one-step thermal coupling of a rotor having a male axial projection and its supporting shaft having an end portion comprising a female cavity with a shape and size for receiving the male projection with interference at an ambient temperature. The rotor and the shaft are made of different materials. Heating of the end portion of the shaft provides expansion of the female cavity and allows for inserting the mail projection of the rotor into the female cavity of the shaft. By cooling the end portion to the ambient temperature the contraction of the cavity is obtained forming fixed interference coupling between the shaft and the rotor, where the end portion of the shaft contracts and compresses about the male axis projection of the rotor.

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Turin, Italy

Vincenzo Pandolfo