摘要:
A method and system for diagnosing gear condition by comparing data collected from each member of a set of coupled gears, including mating gears. Data containing vibrations or other signals from the set of coupled gears are collected. Condition indicators are calculated from the vibration data. The values of these condition indicators are compared for each pair of coupled gears. A divergence of the condition indicators as indicated by the comparison may indicate the presence of a faulted or otherwise anomalous condition. Such indication may be provided to a user. In one variation, the vibration data are used to calculate a synchronous average for each gear and the condition indicators are based on the synchronous average.
摘要:
An improved method and apparatus for creating a representation of transferred torque (τtr) over a rotation angle interval (α) for a torque transferring system wherein the torque transferring system includes at least two meshing gears, a torque meter for monitoring the transferred torque (τtr) in the torque transferring device, and an angular meter arranged to monitor an angular position (α) of at least one of the meshing gears over at least one angular interval (αint). Further, the system includes a processor that is adapted to: map the transferred torque (τtr) to the monitored angular interval (αint) and create a representation of the transferred torque (τtr) over said angular interval (αint), analyze said representation in order to identify deviations from an expected representation, and based on said analysis determining a gear condition of at least one of the at least two meshing gears in the torque transferring device.
摘要:
Die Erfindung betrifft ein wartungsoptimiertes Schwenkantriebs- oder Schneckengetriebesystem (1), zur Installation in einer Anlage bzw. Maschine (38) oder als Baugruppe eines Fahrzeuges (34), aufweisend eine Schneckenwelle (5) und ein in diese Schneckenwelle (5) eingeformtes oder eingearbeitetes Schraubengewinde (4), sowie ein mit diesem Schraubengewinde (4) kämmendes Schneckenrad (2) das durch ein Gehäuse (14) geschützt ist und innerhalb dieses Gehäuses (14), verdrehbar gelagert ist. Die Erfindung ist dadurch gekennzeichnet, dass mindestens eine Schneckenwelle (5) von einem Gehäuseteil oder Gehäuseabschnitt (12) geschützt ist, wobei dieser Gehäuseteil-/ abschnitt (12) einen oder mehrere Aufnahme- oder Befestigungsort(e) (A ; B ; S) für Sensoren bzw. Sensorik (15) vorsieht, zur Erfassung von Messgrößen oder Daten oder Signalen (33) der Schneckenwelle (5), insbesondere von Überlast- und/ oder Positions- und/ oder Lagemessgrößen entlang oder orthogonal zu deren Längsachse (6). Ein entsprechendes Verfahren zur Zustandsbasierten Wartung oder Wartungsoptimierung wird ebenso bereitgestellt.
摘要:
A gearbox condition monitoring system comprises at least one vibration sensor (74,76,78,80) located on a gearbox casing (24). A processing unit (82) is coupled to the vibration sensor and is configured to receive signals representative of the detected vibrations from the vibration sensor. The processing unit may be operable to process the signals representative of detected vibrations of gears (18,20,22) and bearings (34,36,etc.) and to compute at least one dynamic energy index or location of fault.
摘要:
A wave motion gearing speed reducer (20) is disposed between a driving motor (15) and a control shaft (11) of a variable compression ratio mechanism. There are provided a input shaft rotation sensing sensor (31) to sense the rotational position of an input shaft (16) of the speed reducer (20), and an output shaft rotation sensing sensor (32) to sense the rotational position of an output shaft (12) of the speed reducer (20). When a discrepancy quantity (”µ) between sensed quantities of both sensors is greater than or equal to a predetermined value, a judgment is made that a ratcheting of slippage of an engaging position between internal teeth (22) and external teeth (25) is generated.
摘要:
The invention relates to a method for monitoring a gearbox (20) of a wind energy installation (12) comprising said gearbox (20) and at least one gearbox fluid circuit (22), in which method at least one particle characteristic variable of particles contained in the gearbox fluid, in particular the quantity and/or the size and/or the type of these particles, is determined by measurement on at least one gearbox position (36, 36', 36'', 36''') in the gearbox (20) and/or by fluid sampling on at least one such gearbox position (36, 36', 36'', 36'''), and a subsequent measurement of the particle characteristic variable of the particles contained in the gearbox fluid is determined in a path of the gearbox fluid circuit (22). Furthermore, at least one operating characteristic variable (n, P, T) is determined, by means of which a current operating state of the wind energy installation (12) and/or of the gearbox (20) at the moment of the at least one measurement is determined, the at least one measurement being evaluated according to the operating state thus determined. The invention further relates to a corresponding computer program product, a corresponding monitoring system for monitoring a gearbox (20) of a wind energy installation (12) and a corresponding wind energy installation (12).
摘要:
A gear is provided that includes a gear surface with a vibration sensor. The vibration sensor further includes an accelerometer coupled to a data transmitter and the vibration sensor is provided within a cavity in the gear surface.
摘要:
A method of deriving a representation of a first signal involves (a) deriving a second signal which is a version of the first signal having one or more frequency components each being shifted in phase with respect to a corresponding component of the first signal by the same predetermined, non-zero phase amount; (b) using zero-crossings of one of the first and second signals to determine sampling instants at which the other of the first and second signals is sampled; (c) combining the samples to obtain a combined value; and (d) repeating steps (b) and (c) with different time-shifts between the first and second signals, whereby the combined values for the different time-shifts collectively form a representation of the first signal.