Fluidic device and pump device

Abstract

Provided is a fluidic device of a pump device or a waterpower device, capable of ensuring high liquid sealability and air sealability even that a through hole is formed on a bulkhead component arranged between an electromagnetic part and a fluid chamber. In the pump device (100), a holding component (5) of a plurality of fixing components (11) is provided with a barrel part (51) for accepting a sealing component, the barrel part (51) is provided with an annular space (80) between the bulkhead component (4) and a peripheral surface of a rotating shaft (7) on the side of an engine part (2), the annular space (80) is provided with a first annular sealing component (8) contacting with the peripheral surface of the rotating shaft (7) and an inner circumferential surface of the barrel part (51). Furthermore, a second annular sealing component (91) is arranged between the bulkhead component (4) and the holding component (5) on the peripheral side of the annular space (80).

Description

technical field [0001] The present invention relates to a fluid device such as a pump device or a hydroelectric generator connected to an impeller body by passing a rotating shaft from an electromagnetic part through a through hole formed in a partition member between the electromagnetic part and a fluid chamber. Background technique [0002] As a pump device, a pump device in which a rotating shaft of a motor is inserted through a through hole formed in a partition member between the motor part (electromagnetic part) and the pump chamber (fluid chamber) to be connected to the impeller body has been proposed. In the above pump device, Generally, it is a structure in which the end part of the rotating shaft is press-fitted into the connecting cylindrical part formed on the impeller body. In addition, in the pump device, in order to prevent the liquid passing through the pump chamber from leaking to the motor part side through the through hole of the partition member, and to p...

AI Technical Summary

Problems solved by technology

[0005] However, as in the structures described in Patent Document 1 and Patent Document 2, in the structure in which an annular sealing member is formed around the connecting cylindrical portion of the impeller body, there is a problem that the liquid-tightness and air-tightness are low.

That is, since the impeller body is connected to the rotating shaft, due to the error of the above-mentioned connection part, etc., the impeller body will cause rotational vibration, and the liquid tightness and airtightness will be reduced.

In addition, when the rotating shaft is pressed into the connecting cylindrical part of the impeller body, the connecting cylindrical part will be slightly deformed, and the roundness of the outer peripheral surface of the connecting cylindrical part will be reduced, and the liquid tightness and airtightness will be reduced.

The same problem occurs in hydroelectric installations

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