摘要:
In an electrical machine having a roller bearing, whose inner ring is seated on the rotor shaft of the electrical machine, whose outer ring is seated in a housing and which is located in a closed area, the roller bearing is intended to be protected against electrical breakdowns. For this purpose, the area contains a liquid on an aqueous basis, whose level overhangs the external contour of the inner ring at its lowest point. The inner ring and the outer ring are therefore conductively connected and the voltage can be equalized between the rotor and the housing of the electrical machine, without any impediment and without breakdowns. In an application as a geared motor, the lubricant for the gearbox is also a liquid on an aqueous basis.
摘要:
A spindle condition detection device for a machine tool includes: bearing load detecting means (16, 17, 20) for detecting a load on a bearing (14) that rotatably supports a spindle (12) of a machine tool; and present usage ratio calculating means (30) for calculating, based on the load detected by the bearing load detecting means (16, 17, 20), a present usage ratio that is a ratio of usage of the bearing (14) with respect to a prescribed operating life of the bearing (14), which is achieved over a period until a present moment.
摘要:
The invention relates to a method for detecting a structural defect in a mechanical assembly including a rotary member, wherein said method comprises a preliminary analysis for identifying a frequency characteristic of the occurrence of the defect over a revolution of said member, and the iterative steps of: measuring the instantaneous rotation speed of the rotary member; angularly sampling said measure so as to obtain a sampled signal representative of the instantaneous rotation speed of the member; carrying a harmonic space analysis of the sampled signal in order to obtain a spectrum of the instantaneous rotation speed of the member; monitoring the amplitude of the spectrum for the characteristic frequency so as to derive the occurrence of a corresponding defect based on said amplitude.
摘要:
The invention concerns a sensor unit (01) with at least one sensor (02), for monitoring a characteristic of a wheelset bearing on a rail vehicle. The sensor unit (01) further comprises a computer unit (06) which receives the data supplied by the sensor at a data input (09). The computer unit is preferably formed from a microcontroller (06), which provides nonvolatile storage for storing the data read in from the sensor.
摘要:
Die Erfindung betrifft eine Antriebsanordnung, umfassend eine Welle (4), wobei die Welle (4) durch mindestens ein Wälzlager (5) mit einem inneren Laufring (5c), Wälzkörpern (5a) und einem äußeren Laufring (5b) drehbar gelagert ist, einen Antrieb (12), der die Welle (4) antreibt, und eine Steuereinheit (6), die mit dem Antrieb (12) verbunden ist, um den Antrieb (12) zu aktivieren und zu deaktivieren, wobei die Steuereinheit (6) ausgelegt ist, den Antrieb (12) bei stillstehender Welle (4) kurzzeitig zur Drehung anzusteuern, um die Welle (4) um einen Drehwinkel weiterzudrehen, um eine Relativposition zwischen den Wälzkörpern (5a) und den Laufringen (5b,5c) zu verändern.
摘要:
The aim of the invention is to provide a bearing ring which is characterized by a reliable and maintenance-free protection from frictional corrosion on the fits of the bearing ring, said protection being already effective during assembly. To achieve this aim, the bearing ring (1) has a wall (9) that is provided with a frictional corrosion-resistant layer (10) in at least those regions (12) that are in contact with a machine component (15) via a fit (14) when assembled.