| 摘要 |
<p>The invention concerns a flow meter of the type that uses a measuring ball which is brought in movement by the liquid or gas stream. The ball is led in a radial track and the number of revolutions is an indication of the flow that passes the flow meter. The invention is characterised by keeping the circumference of the passages constant until beyond the ball. The liquid- or gas stream moves axial in the inlet and enters radial in a section with spiral grooves after which the measuring ball in a radial track is driven by the stream. By making the inner diameter of the spiral groove equal or larger than the diameter of the inlet there will come into being hardly any turbulence in the stream. Therefore has the ball a small diameter and the resistance in the meter will be low.</p> |
