Abstract:
Bei einem Verfahren zur Schwingungsanalyse an einer Maschine (2), insbesondere an einer Axialkolbenmaschine (2), wird ein an der an einer beliebigen Betriebsanlage (62) angeschlossenen Maschine (2) erfasstes Schwingungsverhalten in einem aktuellen Maschinenzustand mit einer Übertragungsfunktion in ein Schwingungsverhalten umgewandelt, welches der an eine Referenzanlage (60) angeschlossenen Maschine (2) im aktuellen Maschinenzustand entspricht. Die Übertragungsfunktion wird als Quotient aus einem Schwingungsverhalten der an die Referenzanlage (60) angeschlossenen Maschine (2) in einem Maschinenausgangszustand und einem Schwingungsverhalten der an eine weitere beliebige Betriebsanlage (64) angeschlossenen Maschine (2) im Maschinenausgangszustand gebildet, um das Schwingungsverhalten der an die Referenzanlage (60) angeschlossenen Maschine (2) im aktuellen Zustand mit dem Schwingungsverhalten der an die Referenzanlage (60) angeschlossenen Maschine (2) im Maschinenausgangszustand zu vergleichen. Des weiteren wird eine Vorrichtung (72) und ein Computerprogramm zur Durchführung des Verfahrens angegeben.
Abstract:
Die Erfindung betrifft eine Vorrichtung (1) und ein Verfahren zur zustandsabhängigen Wartung von hydrostatischen Verdrängereinheiten (2), insbesondere von als Pumpe oder als Motor betriebenen Axialkolbenmaschinen (3). An der hydrostatischen Verdrängereinheit (2) sind Beschleunigungssensoren (4) und/oder Verschmutzungsgradsensoren (5) angebracht, die Schwingungsdaten bzw. Verschmutzungsdaten der hydrostatischen Verdrängereinheit (2) erfassen und mit einer Auswerteeinheit (6) verbunden sind, welche die Schwingungsdaten bzw. Verschmutzungsdaten zwischenspeichert. Eine mit der Auswerteeinheit (6) verbundene Kommunikationseinheit (7) transportiert diese Daten weiter.
Abstract:
The invention relates to a compressor for a refrigerating agent in a cooling circuit. Said compressor comprises a drive unit (12), a compressor unit which is preferably lubricated by means of an oil circuit (50), and a compressor housing (16) for receiving at least the compressor unit (12) and optionally the drive unit (12). A monitoring device (18) is provided for detecting cases of malfunction. The monitoring device controls the operating state of the compressor according to mechanical vibrations of the same, said vibrations being detected on a measuring point in the region of the compressor housing (16).
Abstract:
Provided is an attachment structure in which a band is used to attach an auxiliary machine of a compressor, such as an accumulator, the attachment structure being capable of reducing the propagation of vibration from the compressor to the auxiliary machine. A compressor (1) has an accumulator (14) attached to the outer peripheral surface of a sealed container (11) by an attachment implement. The attachment implement is provided with: a bail strap (60) which surrounds and holds the periphery of any one of the sealed container (11) and the accumulator (14), and which is provided with an engagement connection end (62) and a fastening connection end (63); a bracket (70) which is fixed to the other one of the sealed container (11) and the accumulator (14), and which is provided with an engagement connection part (72) to be connected to the engagement connection end (62) of the bail strap (60), and a fastening connection part (73) to be connected to the fastening connection end (63) of the bail strap (60); and a buffer layer (62S) disposed between connecting sections of the bail strap (60) and the bracket (70).
Abstract:
Control system for hermetic cooling compressor, which includes a reciprocating compressor (3) and an electronic control (2) for the reciprocating compressor (3), the electronic control (2) being configured for, after commanding the turning off of the reciprocating compressor (3), detecting whether the turn velocity (33) of the turning axle (10) is below a predefined velocity level (34) and then applying a braking torque (36) that causes deceleration of the turning axle (10) before completing the next turn of the turning axle (10), in case the turn velocity (33) detected is below the velocity level (34).
Abstract:
[Object] To provide a pump device capable of achieving a further reduction in power consumption. [Solving Means] A pump device (1) according to an embodiment of the present invention includes a drive motor (M), a first pump unit for evacuation (11) including a first pump chamber and a first piston (21v), and a second pump unit for pressurization (12) including a second pump chamber and a second piston (21c). The second piston (21c) has a phase advanced with a rotational phase difference (ϕ) of more than 0° and less than 80° with respect to the first piston (21v).
Abstract:
Disclosed are a device for reducing vibration in a compressor and a method for controlling reducing the vibration in the compressor. The device for reducing vibration in a compressor includes: a compressor controlled to be operated at a target operating velocity after starting; a power supply unit supplying power to the compressor; and a control unit controlling the power supply unit so that a magnitude or a phase of the power supplied to the compressor is changed, wherein the control unit controls the power supply unit so that the vibration generated in the compressor is offset because exciting force is generated in the compressor with a predetermined time interval at multiple times when the compressor starts or when the compressor stops during a target operation velocity operating of the compressor.
Abstract:
The invention relates to a device (1) and a method for on-condition maintenance of hydrostatic displacement units (2), in particular of axial piston machines (3) operated as a pump or motor. Attached to the hydrostatic displacement unit (2) are acceleration sensors (4) and/or contamination-level sensors (5) which record vibration data or respectively contamination data of the hydrostatic displacement unit (2) and are connected to an evaluating unit (6) which temporarily stores the vibration data or contamination data. A communication unit (7) connected to the evaluating unit (6) relays these data.