JP2015137592A5

JP2015137592A5 -

Info

Publication number: JP2015137592A5
Application number: JP2014009680A
Authority: JP
Filing date: 2014-01-22
Publication date: 2017-02-16
Anticipated expiration: 2034-01-22

Description

上記課題を解決するため、本発明の第一の態様に係るインペラ、及び遠心圧縮機では、以下の手段を採用している。
本発明の一態様に係るインペラは、軸線回りに回転するディスクと、該ディスクの軸線方向一方側の面に、周方向に間隔をあけて複数設けられて軸線方向一方側から流入する流体を径方向外側に向かって排出する流路を画成するブレードと、を備え、前記ブレードは、径方向内側から外側に向かうに従って、軸線方向の寸法が減少するように形成され、前記ブレードに、回転方向前方側を向く圧力面と回転方向後方側を向く負圧面とを連通する孔部が形成され、前記孔部が前記ブレードを貫通する方向は、前記ディスクを基準とする前記ブレードの高さ方向における中間位置を前記軸線方向に結んだ線に沿うように設定されている。 In order to solve the above problems, the following means are employed in the impeller and the centrifugal compressor according to the first aspect of the present invention.
An impeller according to an aspect of the present invention has a disk that rotates around an axis, and a plurality of fluids that are provided on the surface on one side in the axial direction of the disk at intervals in the circumferential direction and flow from one side in the axial direction A blade that defines a flow path that discharges toward the outside in the direction, and the blade is formed such that its axial dimension decreases from the radially inner side toward the outer side, and the blade has a rotational direction. are holes for communicating the negative pressure surface facing the pressure surface and rotationally trailing side facing the front side is formed, and the direction of the hole passes through the blade, in the height direction of the blade relative to the said disc The intermediate position is set along a line connecting in the axial direction .

Claims

A disc that rotates about its axis;
A plurality of blades which are provided on the surface on one side in the axial direction of the disk at intervals in the circumferential direction and define a flow path for discharging fluid flowing in from the one side in the axial direction toward the outside in the radial direction;
With
The blade is formed such that its axial dimension decreases from the radially inner side to the outer side,
Said blade hole for communicating the suction side of the pressure surface facing the rotational direction of the front side and oriented in the direction of rotation rear side is formed,
The impeller that is set so that a direction in which the hole passes through the blade is along a line that connects an intermediate position in the height direction of the blade with respect to the disk in the axial direction .

2. The impeller according to claim 1, wherein the hole extends toward the downstream side of the flow path from the pressure surface side toward the negative pressure surface side.

The impeller according to claim 1 or 2, wherein the plurality of holes are arranged to be spaced apart from each other from the radially inner side toward the outer side.

The impeller according to any one of claims 1 to 3, wherein an opening area of the hole portion increases from the pressure surface side toward the negative pressure surface side.

The impeller according to any one of claims 1 to 4, wherein an aperture area of the hole portion decreases from the pressure surface side toward the negative pressure surface side.

The impeller according to any one of claims 1 to 5, wherein the hole includes a groove formed in a spiral shape on an inner peripheral surface of the hole.

The said hole part has one inflow port provided in the said pressure surface side, and has each of the said inflow port, and has a several injection port provided in the said negative pressure surface side. The impeller according to claim 1.

A centrifugal compressor comprising the impeller according to any one of claims 1 to 7.