| 摘要 |
The invention relates to a plasma spraying apparatus (1) including a plasma torch (2) for heating up a spray powder (3) in a heating zone (4) and a metering unit (5) for metering the spray powder (3), said metering unit (5) for conveying the spray powder (3) into an injection unit (6) by means of a conveyor gas (7) under a pre-determined pressure being connected with a conveyor gas unit (9) via a conveyor gas line (8). The injection unit (6) has an inlet (61) and an outlet (62) designed as a powder injector (62) so that the spray powder (3) can be supplied from the metering unit (5) to the injector unit (6) through the inlet (61) by means o f the conveyor gas (7) via an injector line (10) to the injector unit (6). In this arrangement the injector unit (6) is designed and arranged in such a way that the spray powder (3) can be brought into the heating zone (4) by the conveyor gas (7) emerging from the powder injector (62), with a pressure sensor (11) for the detection of the pressure (P) of the conveyor gas (7) being provided for monitoring the condition of the plasma spraying apparatus (1). The invention further relates to a method for monitoring the condition of a plasma spraying apparatus (1).
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