Regenerative-type fluid machinery having a guide vane on a channel wall

A regenerative fluid machine having guide vanes on a flow channel wall comprising:

• a circular plate-shaped impeller (10) that has a plurality of vanes (12) radially formed on an outer circumference thereof at regular intervals;
• casings (20) in which the impeller (10) is housed;
• and
• flow channels (30), each of which has a suction hole (32) and a discharge hole (34) in opposite ends thereof, and which are circumferentially formed in the casings so as to face the vanes (10),
• wherein the plurality of guide vanes (40) throughout an entire wall (30a, 30b, 30c) of each flow channel (30), wherein the plurality of guide vanes (40) are inclined in a direction opposite a rotational direction of the impeller (10) with an inclined angle (θ), wherein an inner peripheral portion of each of the plurality of guide vanes is curved outwardly toward the rotational direction of the impeller, and wherein the plurality of guide vanes (40) are configured to increase a relative inflow angle (β) of a fluid introduced into impeller grooves (14), and decrease an absolute inflow angle (α) of the fluid, and wherein the guide vanes (40) are formed at a height of 5 to 30% of a depth of the flow channel (30) and formed on at least ⅓ of an area of the flow channel (30) excluding the suction hole (32) and the discharge hole (34).