The invention relates to an online wheel run-out detecting device. The online wheel run-out detecting device includes a frame, a chassis, a lifting cylinder, supports, bearing bases, linear bearings, mounting plates, guide shafts, a lifting shaft, a servo motor, a synchronous pulley, a connecting plate, a synchronous belt, a synchronous pulley, a base, a connecting shaft, a servo motor, a shaft sleeve, a lower end cap, a connecting shaft, a shaft sleeve, and an oil cylinder. The online wheel run-out detecting device can meet requirements of online wheel run-out detection, meanwhile it has the characteristics of simple structure, convenience in manufacturing, stable performance and capability of meeting machining requirements on precision, and can meet requirements of automatic production.

An apparatus is described that determines an estimated rotational speed of a rotating component of a machine in the absence of a reliable tachometer signal to indicate an actual rotational speed. The apparatus includes a processor that produces a spectral plot of the vibrational data, locates peaks in the spectral plot, and scans the spectral plot in predetermined rotational speed increments to provide candidate rotational speeds. For each candidate rotational speed, associated harmonics are identified, closest peaks in the spectral plot to the candidate rotational speed and its harmonics are located, gaps between the closest peaks and the candidate rotational speed and its harmonics are measured, and a sum of the gaps is recorded. The estimated rotational speed is the candidate rotational speed associated with a minimum sum of the gaps.

An apparatus is described that determines an estimated rotational speed of a rotating component of a machine in the absence of a reliable tachometer signal to indicate an actual rotational speed. The apparatus includes a processor that produces a spectral plot of the vibrational data, locates peaks in the spectral plot, and scans the spectral plot in predetermined rotational speed increments to provide candidate rotational speeds. For each candidate rotational speed, associated harmonics are identified, closest peaks in the spectral plot to the candidate rotational speed and its harmonics are located, gaps between the closest peaks and the candidate rotational speed and its harmonics are measured, and a sum of the gaps is recorded. The estimated rotational speed is the candidate rotational speed associated with a minimum sum of the gaps.

A rotor balancing method for a gas turbine on a balancing machine, includes performing a base run by running the rotor at an intended balance speed and measuring the vibrations at a first pedestal; carrying out partial balancing; performing a first influence run by fitting a first balancing weight to a first correction plane in order to reduce vibrations at the first pedestal; performing a second influence run by fitting a first calibration weight to a second correction plane, running the rotor at the intended balance speed and measuring the vibrations at the first pedestal and the second pedestal, and removing the first calibration weight; and carrying out final balancing of the rotor by fitting a final balancing weight to the first correction plane and a second balancing weight to the second correction plane dependent on vibrations measured as part of the first influence run and the second influence run.

A rotor balancing method for a gas turbine on a balancing machine, includes performing a base run by running the rotor at an intended balance speed and measuring the vibrations at a first pedestal; carrying out partial balancing; performing a first influence run by fitting a first balancing weight to a first correction plane in order to reduce vibrations at the first pedestal; performing a second influence run by fitting a first calibration weight to a second correction plane, running the rotor at the intended balance speed and measuring the vibrations at the first pedestal and the second pedestal, and removing the first calibration weight; and carrying out final balancing of the rotor by fitting a final balancing weight to the first correction plane and a second balancing weight to the second correction plane dependent on vibrations measured as part of the first influence run and the second influence run.

A data recording and transmission method and system for use in balancing a propeller of an aircraft. The method comprises operating the propeller in-flight, receiving, during operation of the propeller in-flight, vibration data associated with the propeller, retrieving, from a non-volatile memory on-board the aircraft, configuration data associated with the propeller, and transmitting the vibration data and the configuration data to a data processing device configured to determine a balancing solution for the propeller based one the vibration data and the configuration data.

A data recording and transmission method and system for use in balancing a propeller of an aircraft. The method comprises operating the propeller in-flight, receiving, during operation of the propeller in-flight, vibration data associated with the propeller, retrieving, from a non-volatile memory on-board the aircraft, configuration data associated with the propeller, and transmitting the vibration data and the configuration data to a data processing device configured to determine a balancing solution for the propeller based one the vibration data and the configuration data.

A device for treating a web of fibrous material, the device comprising: a sensor for detecting vibrations; a multi-part housing including a cover; and a plurality of fiber treatment tools arranged inside the multi-part housing, the plurality of fiber treatment tools including a plurality of treatment profiles facing one another, being arranged spaced apart from each other so as to form at least one treatment gap with the plurality of treatment profiles, and being mounted rotatably relative to one another, at least one of the plurality of fiber treatment tools being mounted axially movable in the multi-part housing so as to be configured for adjusting a width of the at least one treatment gap between the plurality of treatment profiles facing each other, at least one of the plurality of fiber treatment tools being supported by a part of the multi-part housing, the sensor being arranged on the multi-part housing.

A device for treating a web of fibrous material, the device comprising: a sensor for detecting vibrations; a multi-part housing including a cover; and a plurality of fiber treatment tools arranged inside the multi-part housing, the plurality of fiber treatment tools including a plurality of treatment profiles facing one another, being arranged spaced apart from each other so as to form at least one treatment gap with the plurality of treatment profiles, and being mounted rotatably relative to one another, at least one of the plurality of fiber treatment tools being mounted axially movable in the multi-part housing so as to be configured for adjusting a width of the at least one treatment gap between the plurality of treatment profiles facing each other, at least one of the plurality of fiber treatment tools being supported by a part of the multi-part housing, the sensor being arranged on the multi-part housing.

A dynamic balance testing device includes a vibrating unit configured to rotatably hold a predetermined rotating body being a specimen, a first spring configured to elastically support the vibrating unit and restrict displacement of the vibrating unit in a direction parallel to a rotation axis of the predetermined rotating body, and at least three second springs configured to elastically support the vibrating unit and restrict displacement of the vibrating unit in a predetermined direction orthogonal to the rotation axis. The at least three second springs are attached to the vibrating unit on a same predetermined plane, and the vibrating unit holds the predetermined rotating body such that a projection of a center of gravity of the predetermined rotating body onto the predetermined plane is substantially at the same position as a position where the first spring is attached to the vibrating unit.