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Fluid machine

A fluid machinery and impeller technology, which can be used in mechanical equipment, liquid fuel engines, components of pumping devices for elastic fluids, etc., and can solve problems such as increasing the manufacturing cost of fluid machinery.

Inactive Publication Date: 2007-06-06
FANUC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, incidental equipment such as these press machines and cooling mechanisms may become the main cause of increasing the manufacturing cost of fluid machines.

Method used

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Embodiment Construction

[0018] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, common reference numerals are attached to the same or similar constituent elements.

[0019] Referring to the drawings, FIG. 1 shows a shaft 12 and an impeller 14 of a fluid machine 10 according to an embodiment of the present invention. The fluid machine 10 of the illustrated embodiment is a machine having a structure of a centrifugal blower, and well-known structures can be used for the structure of the blades of the impeller 14 and the structure of the casing (not shown), so description thereof will be omitted. In addition, the present invention is not limited to the centrifugal blower, and can be applied to other various fluid machines.

[0020] The fluid machine 10 includes a shaft 12 and an impeller 14 having a shaft hole 16 inserted into the shaft 12 , and has a structure in which the impeller 14 is coupled to the shaft 12 by interferenc...

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PUM

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Abstract

A fluid machine including a shaft and an impeller, wherein the impeller has a shaft bore into which the shaft is inserted, and wherein the impeller is coupled to the shaft by an interference fit. The fluid machine further includes a positioning part provided between the shaft and the impeller, for positioning the impeller at a predetermined position on the shaft; a fitting part provided inside the shaft bore and adjacent to the positioning part, for forming the interference fit between the shaft and the impeller; and a loose-insertion part provided inside the shaft bore and adjacent to the fitting part, for forming a clearance between the shaft and the impeller.

Description

technical field [0001] The invention relates to a fluid machine, in particular to a fluid machine in which a shaft and an impeller are combined with each other by interference fit. Background technique [0002] In a high-speed rotary fluid machine such as a blower used in a laser oscillator, it is necessary to securely attach an impeller to a shaft (rotation shaft) with high precision. Then, in the past, for example, as described in JP-A-7-63193 (JP-A-7-063193), by shrink-fitting the impeller and the shaft, it is possible to prevent the relative fluctuation in the circumferential direction that may occur during the high-speed rotation of the two. Make a steady high-speed rotation. [0003] In addition, as described in JP-A-2004-60460 (JP-A-2004-060460), there is also known a structure in which only a part of the shaft hole provided in the impeller is fitted to the shaft by shrink fitting. JP-A-2004-060460 also describes a method in which the impeller is placed on the base ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/28F04D29/62
CPCF04D29/266F04D29/20
Inventor 川合晓太田一也江川明
Owner FANUC LTD
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