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.
CN1975173AInactive Publication Date: 2007-06-06FANUC LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
FANUC LTD
Publication Date
2007-06-06
Estimated Expiration
Not applicable Β· inactive patent

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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.
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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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