| 摘要 |
1. Multi-stage impeller pump with a balance disk placed behind the last impeller and shaft slide indicator, characterised in that in the first stage, it has a built-in shaft slide limiter in a form of a slide ring (2) with an elastic layer (3), placed against the butting face (5) of the first stage impeller's neck (6) in the event of excessive wear and tear of the balance disk, and the indicator (7) of the shaft slide (1), which closes the circuit of a light and sound signalling device (9) after closing with a resistance plate (8).<IMAGE>
|
