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centrifugal compressor impeller

A centrifugal compressor and impeller technology, applied in mechanical equipment, non-variable-capacity pumps, non-displacement pumps, etc., can solve the problems of sacrificing the performance of the impeller and restricting the shape of the blades

Active Publication Date: 2020-10-02
IHI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the impeller that can be released in the direction of the rotation axis, the shape of the blade is greatly restricted, so the shape of the blade has to be simplified, and as a result, the performance of the impeller has to be sacrificed.

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 approach 〕

[0017] Hereinafter, a centrifugal compressor impeller 1 (hereinafter simply referred to as "impeller 1") according to one embodiment of the present disclosure will be described in detail with reference to the drawings.

[0018] figure 1 The impeller 1 shown in the centrifugal compressor rotates around the axis of rotation C in the direction of arrow J, and discharges the gas introduced from the direction of the axis of rotation C along the radial direction of rotation. The impeller 1 includes: a hub 3 ; and a plurality of (for example, six) long blades 5 arranged on the hub 3 at equal intervals in the rotational circumferential direction. In addition, the impeller 1 includes a plurality of (for example, six) short blades 7 , and one piece is arranged between the long blades 5 .

[0019] Here, attention is paid to one short blade 7 of the impeller 1 and two long blades 5 sandwiching the short blade 7 in the rotational circumferential direction. Let the short blade 7 of intere...

no. 2 approach 〕

[0040] Figure 5 The illustrated centrifugal compressor impeller 71 is a centrifugal compressor impeller including a hub 3 and a plurality of (for example, six) long blades 75 arranged at equal intervals in the rotational circumferential direction on the hub 3 . The impeller 71 does not include the short blades 7 that are included in the impeller 1 of the first embodiment (see figure 1 ). The impeller 71 has a line-of-sight direction parallel to the imaginary plane S orthogonal to the rotation axis C, and it is possible to see the entire negative-pressure surface 81 of one long blade 75A and the negative-pressure surface 81 opposite to the negative-pressure surface 81. All positive pressure surfaces 82 of other adjacent long blades 75B. Figure 5 It is a side view of the impeller 1 seen from this viewing direction. In addition, in order to satisfy the condition that there is a line-of-sight direction as described above, when the number of long blades 75 is M, the opening an...

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Abstract

The centrifugal compressor impeller of the present invention includes: a hub; a plurality of long blades arranged on the hub in the rotational circumferential direction; and short blades arranged between the long blades. The impeller of the centrifugal compressor has the following The line of sight direction, which is a direction parallel to an imaginary plane orthogonal to the rotation axis, and can see: all the negative pressure surfaces of the long blades adjacent to the front of the rotation direction of the short blades, and the rear of the rotation direction of the short blades All the positive pressure surfaces of the adjacent long blades and the entire surface of the short blades.

Description

technical field [0001] The present disclosure relates to centrifugal compressor wheels. Background technique [0002] Conventionally, a centrifugal compressor impeller described in Patent Document 1 below has been known as a technique in this field. Patent Document 1 describes manufacturing an impeller by injection molding. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2014-238084 [0004] In general, impellers for centrifugal compressors have blades with complex curved surfaces, and therefore, when manufactured by injection molding, demolding becomes a problem. That is, in the mold for forming the blade, it is necessary to avoid interference between the blade and the mold at the time of demoulding. Therefore, if the shape of the blade is complicated, the mold needs to be finely divided in order to be able to be released from the mold, which deteriorates productivity. On the other hand, it is also conceivable to release the mold in the direction of the rotati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/30F04D17/10
CPCF04D17/10F04D29/30F04D29/284F04D29/666F05D2240/304F04D29/4213F04D29/444
Inventor 桐明拓郎杜塔苏米亚
Owner IHI CORP