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Impeller for centrifugal rotating machine, and centrifugal rotating machine

A rotating machinery and centrifugal technology, applied in the direction of mechanical equipment, machine/engine, engine function, etc., can solve the problems of increased cost and complex structure

Active Publication Date: 2019-12-13
MITSUBISHI HEAVY IND ENGINE & TURBOCHARGER LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the structure of this method is complicated, there is a problem that the cost required for manufacturing and assembling increases

Method used

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  • Impeller for centrifugal rotating machine, and centrifugal rotating machine
  • Impeller for centrifugal rotating machine, and centrifugal rotating machine
  • Impeller for centrifugal rotating machine, and centrifugal rotating machine

Examples

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Embodiment Construction

[0084] Hereinafter, some embodiments of the present invention will be described with reference to the drawings. However, dimensions, materials, shapes, relative arrangements, and the like of components described in the embodiments or shown in the drawings do not limit the scope of the present invention thereto, but are merely illustrative examples.

[0085] For example, expressions indicating relative or absolute configurations such as "in a certain direction", "along a certain direction", "parallel", "orthogonal", "center", "concentric" or "coaxial", not only Strictly refers to such an arrangement, and also refers to a state of being relatively displaced by an angle or a distance to the extent that a tolerance or the same function can be obtained.

[0086] For example, expressions indicating that things such as "same", "equal", and "uniform" are in an equal state not only indicate a state of being strictly equal, but also indicate a state where there is a difference in the de...

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PUM

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Abstract

According to several embodiments, an impeller for a centrifugal rotating machine comprises: a hub which includes a small-diameter portion positioned at one end in an axial direction and a large-diameter portion positioned at the other end in the axial direction and having a diameter greater than that of the small-diameter portion; and blades which include a first edge positioned at the axial direction position of the small-diameter portion and a second edge positioned at the axial direction position of the large-diameter portion, and which are disposed on an outer peripheral surface of the hub. In the impeller, at least a part of a blade height range of 50% or more of a first radial cross section at an axial direction position passing through the tip of the first edge is inclined toward the downstream side in a rotating direction of the impeller with respect to the radius direction.

Description

technical field [0001] The present disclosure relates to an impeller of a centrifugal rotary machine and a centrifugal rotary machine including the impeller. Background technique [0002] For the impellers of centrifugal rotating machines such as turbochargers and turbines, as the rotational speed increases, the centrifugal stress generated on the blade surface and the blade tip tends to increase. Improving the strength of the impeller by adjusting the blade thickness or increasing the fillet diameter in response to this stress increase may result in a decrease in the throat area or a decrease in performance. [0003] Patent Document 1 describes a method of attaching a ring to an end portion of a rotor blade (a portion deformed largely by application of high centrifugal stress) to increase strength and reduce deformation due to centrifugal stress. However, since the structure of this method is complicated, there is a problem that the cost required for manufacture and assemb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/30
CPCF04D29/30F04D29/284F05D2250/51F05D2260/941F05D2250/38F05D2240/303F05D2240/307F05D2250/71B33Y80/00F01D5/021F01D5/141F05D2220/40F04D29/384
Inventor 本田浩范岩切健一郎
Owner MITSUBISHI HEAVY IND ENGINE & TURBOCHARGER LTD