JPS63150040A - Low speed rotary apparatus - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a low-speed rotation mechanism that is installed at a blow-off port of a bubble bath or the like and swings the blow-out flow at a low speed using the energy of the fluid itself.

2. Description of the Related Art A conventional flow blowing device using a low speed rotating device is shown in FIG. In the figure, 1 is a flow path, 2 is a wall that constitutes the flow path 1,
3 is a water wheel that rotates with the energy of the flow, 4 is the shaft of the water wheel 5
The bearing 1.6 that supports the water wheel is integrated with the shaft 5 of the water wheel.The gears 1.7 to 10 are a group of reduction gears that reduce the rotation of the gear 1.
1 is a bearing 2 that supports the gear 10; 10a is a shielding plate that blocks a part of the flow; 12 is a nozzle having a diaphragm 12a; and 13 is a guide wall that gradually expands toward the downstream. The rotational force of the water turbine 3 rotated by the flow F is decelerated by the gear groups 7 to 10, causing the shielding plate 11 to rotate at a low speed. on the other hand,
The flow is deflected at a wide angle toward the shielding plate 11 by the deflection portions 11 to 13. (Unexamined Japanese Patent Publication No. 58-13
6995).

As described above, since the shielding plate 11 is rotating at a low speed, the flow swings in all directions in response to the rotation of the shielding plate 11. The reason why a low-speed transmission mechanism is necessary here is that if the rotation of the water turbine is directly transmitted to the shielding plate 11,
This is because the shielding plate rotates before the deflection operation is performed, making it impossible to perform the swing operation. Further, even if the deflection action can be performed, the swing is too fast and a comfortable swing state cannot be achieved.

Problems to be Solved by the Invention In the conventional example described above, the structure is complicated due to the use of multiple gears, and the static friction caused by the large number of bearings is large, so the water turbine does not start rotating at low flow rates. . Furthermore, since the rotational speed increases in proportion to the flow rate, there is a problem in that when the flow rate is large, the swing speed also increases, making it uncomfortable.

The present invention solves these conventional problems, and has a simple structure, can start even at low flow rates, and suppresses the increase in rotational speed to a small extent even at high flow rates.

Means for Solving the Problems In order to solve the above problems, the low speed rotating device of the present invention has the following features:
An impeller that is provided in a flow path formed by a flow path wall and rotates by the energy of the fluid flowing through the flow path, and at least one protrusion that is provided downstream of the impeller and rotates around the flow direction. A groove having a width that allows the protrusion to rotate is formed in a portion of the body and the channel wall corresponding to the protrusion of the rotating body, and a distance between the inner surface of the groove and the protrusion is determined such that rotational resistance due to viscosity of the fluid occurs. It has been reduced to a certain extent.

Operation According to the above-described configuration, the rotational force generated by the impeller is suppressed by the viscous resistance of the fluid generated when the protrusion rotates in the groove, resulting in low-speed rotation. As a result, at startup, the number of bearings is small, so the static friction is small, and the rotational resistance of the fluid is approximately zero, so the impeller rotates even at a low flow rate.

As the flow rate increases and the rotation speed of the impeller increases, the frictional resistance due to the viscosity of the fluid also increases, suppressing the increase in rotation speed. Therefore, even if the flow rate increases significantly, the rotational speed increases little, and a comfortable swinging motion is maintained.

Example Embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIGS. 1 to 3, 14 is a flow path, and 15 is a flow path 14.
16 is an impeller (water wheel) that is rotated by the energy of the fluid, 17 is a bearing that supports the impeller shaft 18, and 19 is provided downstream of the impeller 16, and is configured to rotate in the flow direction (direction of F). It is a rotating body having at least one protrusion 20 that rotates as an axis, and this protrusion 20 is composed of a flat plate placed parallel to the flow, and is fixed to the rotating body main body 19a. Further, the rotating body 19 is configured to rotate together with the impeller 16. Reference numeral 21 denotes a groove provided in the channel wall 15 at a position corresponding to the protrusion 20 of the rotating body.
The protrusion 2 is ring-shaped and has two side surfaces 22a and 22b.
The width W1 is larger than the width W2 of the protrusion 20 so that the protrusion 20 rotates inside. Further, the gaps h1 and h2h3 between the protrusion 20 and the groove 21 are each set to be small so as to generate rotational resistance due to the viscosity of the fluid. 23 is a bias shielding plate, which prevents the bias flow F generated by the aperture 24a.
This is to block out a. 24 is a nozzle having an aperture 24a, and 25 is a guide wall that gradually expands toward the downstream.

The operation in the above configuration will be explained below. The flow F entering the flow path 14 rotates the impeller 16 and becomes Fl and F2. This flow becomes flows Fa and Fb substantially perpendicular to the direction of the flow F by the throttle 24a. and F in the figure
Since the flow a is blocked by the bias shielding plate 23, the flow coming out of the nozzle 24 is tilted upward in the figure, and the flow is directed toward the guide wall 2.
5 and deflects like F3. On the other hand, the rotating body 19
Since it is integrated with the impeller 16, it rotates together.

This rotation causes the protrusion 20 to rotate within the groove 21. In this case, since the gaps h1, h2, and h3 are set to be minute, rotational resistance occurs due to the viscosity of the fluid. This phenomenon will be explained using the gap h2 as a representative example. As shown in FIG. 4, when the end face 22 is in the state indicated by the two-dot chain line, the velocity distribution V shown in the figure occurs due to the viscosity of the fluid. And end face 2
When 2 is in the state shown by the two-dot chain line, the velocity near the end face is approximately 0, and almost no fluid friction with the end face occurs. On the other hand, when the end face 22 has only a gap h2 between the protrusion 20 and the protrusion 20 as in the present invention, a flow with a velocity ul exists near the end face 22, so there is fluid friction between this flow and the end face 22. Resistance arises. Therefore, the rotational energy of the protrusion 20 is taken away by the fluid frictional resistance, and the rotational speed decreases. As the rotation speed of the protrusion 22 increases, the speed u1 increases, so the frictional resistance increases, and the rotation of the protrusion 20, that is, the rotation of the aquatic 16, is suppressed. Further, as can be seen from the figure, the smaller h2 is, the larger U becomes, the frictional resistance increases, and the effect of suppressing the water wheel's 160 rotations becomes greater. Further, when the protrusion 20, that is, the water turbine 16 is started, ul is small;
Starting is easy because there is almost no frictional resistance. Therefore, when the flow rate is small, that is, the impeller 160
Even if the rotational torque is small, the fluid resistance to rotation is small at the time of startup and rotation occurs. When the flow rate increases, the fluid resistance increases in proportion to the rotational speed, so an increase in the rotational speed can be suppressed. Therefore, even at high flow rates, the rotation speed does not change significantly. Due to this rotation, the shielding plate 2
3 rotates together with the rotating body 19, this rotates, thereby deflecting the flow in the direction that is blocked. The flow then performs a slow swinging motion.

Effects of the Invention As described above, the low-speed rotating device of the present invention provides the following effects.

(1) It has a simple configuration and is easy to deal with dust etc. in the flow.

(2) Since it uses fluid resistance to suppress the rotational speed, static friction does not become large as in conventional systems, and it operates even at low flow rates. Furthermore, even if the flow rate increases, there is an effect of suppressing the increase in rotational speed to a small level.

Therefore, when applied to a bath outlet, etc., a comfortable swinging state can always be achieved regardless of changes in flow rate.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of a low-speed rotating device according to an embodiment of the present invention, FIG. 2 is a sectional view of the same, and FIG.
4 is a partially enlarged view of FIG. 3, and FIG. 5 is a sectional view of a conventional low-speed rotating device. 14... Channel, 15... Channel wall, 16
... Impeller, 19 ... Rotating body, 20.
...Protrusion, 21...Groove. Name of agent: Patent attorney Souo Nakao and 1 other person No. 3
figure

Claims (2)

[Claims] (1) An impeller that is provided in a channel formed by a channel wall and rotates by the energy of the fluid flowing through the channel, and at least one protrusion that is provided downstream of the impeller and rotates with the flow direction as an axis. a rotary body having a rotary body, and a groove having a width such that the protrusion can rotate is formed in a portion of the channel wall corresponding to the protrusion of the rotary body, and the distance between the inner surface of the groove and the protrusion is determined by the rotation due to the viscosity of the fluid. A low-speed rotating device that is small enough to create resistance. (2) The low-speed rotation device according to claim 1, wherein the flow path is configured in a cylindrical shape and the groove is configured in a ring shape.