Impeller
First Claim
1. An impeller, comprising:
- a hub which includes a front surface side, a back surface side, and a boss having a boss hole formed along a rotational axis line of the impeller; and
a plurality of blades which are provided on the front surface side of the hub,wherein the impeller is configured of a resin in which reinforced fibers are dispersed,wherein the boss includesa first region which is disposed on the back surface side, anda second region which is disposed on the front surface side,wherein in the first region, a frequency with which the reinforced fibers, dispersed around the boss hole and adjacent to an inner surface of the boss hole, are oriented to be inclined in a radial direction in a cross section of the hub is higher than a frequency with which the reinforced fibers, dispersed around the boss hole and adjacent to the inner surface, are oriented in a direction along the rotational axis line, andwherein in the second region, a frequency with which the reinforced fibers, dispersed around the boss hole and adjacent to the inner surface, are oriented in the direction along the rotational axis line is higher than a frequency with which the reinforced fibers, dispersed around the boss hole and adjacent to the inner surface, are oriented to be inclined in the radial direction in the cross section of the hub.
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Accused Products
Abstract
The purpose of the present invention is to improve the mechanical strength of a boss in correspondence with the direction in which the principal stress is generated in an impeller formed of fiber-reinforced resin. A hub 11 is provided with a first region α arranged on the back surface 11b side, and a second region β arranged on the front surface 11a side. In the first region α the frequency with which the reinforcement fibers F dispersed at the periphery of a boss hole 12 are oriented inclined with respect to the radial direction of the hub 11 is high, and in the second region the frequency with which the reinforcement fibers dispersed at the periphery of the boss hole are oriented along the rotational axis line is high.
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Citations
15 Claims
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1. An impeller, comprising:
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a hub which includes a front surface side, a back surface side, and a boss having a boss hole formed along a rotational axis line of the impeller; and a plurality of blades which are provided on the front surface side of the hub, wherein the impeller is configured of a resin in which reinforced fibers are dispersed, wherein the boss includes a first region which is disposed on the back surface side, and a second region which is disposed on the front surface side, wherein in the first region, a frequency with which the reinforced fibers, dispersed around the boss hole and adjacent to an inner surface of the boss hole, are oriented to be inclined in a radial direction in a cross section of the hub is higher than a frequency with which the reinforced fibers, dispersed around the boss hole and adjacent to the inner surface, are oriented in a direction along the rotational axis line, and wherein in the second region, a frequency with which the reinforced fibers, dispersed around the boss hole and adjacent to the inner surface, are oriented in the direction along the rotational axis line is higher than a frequency with which the reinforced fibers, dispersed around the boss hole and adjacent to the inner surface, are oriented to be inclined in the radial direction in the cross section of the hub. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification