Total pressure blade type probe

Abstract

The invention belongs to the technical field of pressure test, and discloses a total pressure blade type probe. The total pressure blade type probe comprises at least five probes, a pressure introduction tube and a blade, wherein each probe is a pressure sensing tube with an inner chamfer; the at least five probes are fixed near the front edge of the blade; the axial line direction of the probe faces the expected flow coming direction; the pressure introduction tube is arranged on the surface of the blade or inside the blade; one end of the pressure introduction tube communicates with the probe pressure sensing tube; the other end of the pressure introduction tube is led out from the root part of the blade. Compared with the existing total pressure probe, the total pressure blade type probe has the advantages that the blade of a machine per se is utilized; a probe support rod is not needed; the total pressure of multiple points between blade rows can be measured at the same time; the measuring time is short. Compared with the existing total pressure blade type probe, the total pressure blade type probe provided by the invention has the advantages that the axial line directions of all probes are different and respectively face the expected flow coming directions; the total pressure measuring errors of the probe can be reduced; the consideration is given to the measurement of total pressure in the flow passage inner end wall attaching surface layer; the impeller mechanical rotor outlet or interstage total pressure in the blade height direction can be accurately and comprehensively measured; the total pressure data measuring precision is improved.

Description

technical field [0001] The invention belongs to the technical field of pressure testing, and relates to a flow steady-state total pressure measuring device, in particular to a total pressure vane probe, which is suitable for measuring the distribution of total pressure at the outlet of a turbomachinery rotor or between stages along the blade height direction. [0002] Compared with the existing total pressure measuring device, the present invention utilizes the blade of the object to be measured, does not need a probe rod, and can simultaneously measure multi-point total pressure between blade rows, and the measurement time is short, which is different from the existing total pressure blade type. Compared with the probe, each probe of the present invention has different axis directions, and they are respectively facing the expected incoming flow direction, which can reduce the total pressure measurement error of the probe, and can also take into account the total pressure in th...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: Aiming at the problem that the existing total pressure measurement device cannot fully measure the real total pressure distribution at the rotor outlet or between stages, which affects the measurement accuracy of the total pressure data of the test piece, a total pressure blade type is invented. The probe, compared with the existing total pressure measurement device, can accurately and comprehensively measure the total pressure distribution at the rotor outlet or between stages, and improve the measurement accuracy of the total pressure data of the test piece

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