Inlet device for measuring axial flow pump impeller inlet cross section particle image velocimetry (PIV) flow field
An impeller inlet, cross-section technology, applied to the components of the pumping device for elastic fluids, pumps, pump components, etc., can solve the problem of very difficult testing, achieve a small degree of damage, improve measurement accuracy, and ensure authenticity. sexual effect
Active Publication Date: 2015-06-10
JIANGSU UNIV
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Problems solved by technology
Since the flow direction of the inlet of the axial flow pump is consistent with the axis, it is very difficult to test the PIV on the cross section of the inlet of the axial flow pump perpendicular to the axis.
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Embodiment Construction
[0016] Such as figure 1 and figure 2 As shown, a kind of inlet device of the present invention that is used for measuring the PIV flow field at the inlet cross section of an axial flow pump impeller includes a first elbow 1, a second elbow 2 and a runner chamber 3, and the two ends of the runner chamber 3 are distributed There are a first flange 31 and a second flange 32, wherein the first flange 31 is threadedly connected with the third flange 11 at the end of the first elbow 1, and the second flange 32 is connected with the second flange 32. The fourth flange 21 at the end of the elbow 2 is threaded and sealed. The pump shaft 12 passes through the first elbow 1 and the runner chamber 3. The guide vane body 33 and the impeller 34 in the runner chamber 3 are fixed on the pump shaft in turn. 12, the center of the end face of the connection between the first elbow 1 and the runner chamber 3 is on the axis of the runner chamber 3, and the center of the end face of the connectio...
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An inlet device for measuring an axial flow pump impeller inlet cross section particle image velocimetry (PIV) flow field comprises a first elbow, a second elbow and a runner chamber. Two ends of the runner chamber are connected with the first elbow and the second elbow in sealing mode respectively, a pump shaft penetrates through the first elbow and the runner chamber, a guide vane body and an impeller in the runner chamber are sequentially fixed on the pump shaft, an end face center of a connecting position of the first elbow and the runner chamber is arranged on the axis of the runner chamber, and an end face center of a connecting position of the second elbow and the runner chamber is also arranged on the axis of the runner chamber. A boss is arranged on an outer pipe wall of a curve section of the second elbow, a through hole is arranged on the boss, the through hole is respectively communicated with the second elbow and an inner cavity of the runner chamber, and an organic glass plate is arranged at an outer end face position of the boss. An axial flow pump water inlet structure is improved so that PIV flow field shooting on the cross section of an axial flow pump impeller inlet perpendicular to the axial direction can be finished smoothly, incoming flow authenticity can be guaranteed to a large degree, and PIV measuring precision is improved.
Description
technical field [0001] The invention relates to an inlet device of an axial flow pump, which is mainly used for the PIV test of the flow field on the vertical pump axis section at the inlet of the impeller of the axial flow pump. Background technique [0002] Particle image velocimetry (PIV) is a new type of internal flow testing technology developed in recent years. Since PIV measurement is a non-contact measurement method, it not only has the characteristics of not disturbing the flow field, but also has high accuracy and resolution, and can obtain the flow distribution of the entire field. [0003] Axial flow pumps are characterized by large flow and low head. It is widely used in large-scale water conservancy projects such as the South-to-North Water Diversion Project and national defense equipment. [0004] At present, the PIV test technology has been used in the internal flow field research of the axial flow pump. Yangzhou University master's degree thesis "3D-PIV m...
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IPC IPC(8): F04D29/52
Inventor 张华施卫东张德胜徐焰栋
Owner JIANGSU UNIV