| 摘要 |
FIELD: machine building. ^ SUBSTANCE: procedure consists in sampling portion of preliminary compressed and formed analysed flow and in establishment of parity of linear flow rates of main and sampled flows by equalising pressure of main and sampled flows, thus, facilitating isokinetic selection. Also, whole cross section of the analysed flow is divided into virtual zones approximately equal in area. Further, sampling is successively carried out in the middle of areas of virtual zones. Notably, relative time of sampling in each zone is proportional to relative areas of virtual zones. The device consists of a stepped flange with through orifice in the centre. An upper bush of axial transfer is installed in the flange; with its lower end the bush is rigidly connected to a branch with through orifices. A lower bush is arranged on the lower end of the branch; also, the upper and lower bushes have orifices of the same diameter made asymmetrically relative to axis of the device. A capillary with a replaceable diffuser on its lower end is positioned in these orifices. A piston corresponding to a cylinder bush is arranged on a lower end of the lower bush. A stop interacts with internal surface of the piston; a packing ring is installed between the stop and the piston. On the lower end of the piston there is installed a replaceable diaphragm, while a cylinder jacket is installed between the stepped flange and the stop; the jacket has through orifices. An indicator is set on the upper end of the capillary, while a scale is set on the upper end of the stepped flange. ^ EFFECT: upgraded quality and accuracy of evaluation of flow rate and ratio of phases of measured flows. ^ 2 cl, 1 dwg |
