JP2766972B2 - Rotary fountain rotary drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary driving device used in a rotary fountain for rotating an object such as an object while allowing water to flow out.

[0002]

2. Description of the Related Art FIGS. 4 and 5 show a rotary drive device conventionally used for a rotary fountain of this kind. FIG.
Has a plurality of buckets b radially attached to a shaft a rotatably supported, and a water jet nozzle c for causing a water flow to collide with the buckets b. The rotary drive device shown in FIG. 5 is provided with arms e and e on a rotatably supported shaft d, and water jets which are directed to the tips of these arms e and e in the same direction in the rotation direction of the shaft d. This is provided with nozzles f, f.

[0003]

With respect to the conventional rotary drive device described with reference to FIG. 4, when a low-speed rotation of about 60 rpm or less is required, the distance between the shaft body a and the bucket b is increased to rotate the bucket b. Since it is necessary to increase the radius, it is not suitable as a fountain rotation driving device that requires such low-speed rotation, and even if a low-speed rotation of about 60 rpm or less can be obtained, the torque becomes small. In addition, there is a problem that it is difficult to obtain a constant rotation speed.

[0004] With regard to the conventional rotary drive device described with reference to FIG.
It is necessary to increase the length of the turning radius by increasing the length of
There is a problem that it is unsuitable as a rotary drive for a fountain requiring a large torque.

[0005] The present invention has been made in view of the above problems, and forms a flow field of water, and rotates the shaft body by utilizing the water flow in the flow field and the energy of the flow field. In comparison with the conventional apparatus described with reference to FIGS. 4 and 5, it is possible to provide a rotary fountain driving device which can easily perform low-speed rotation, can obtain a large torque even at low speed, and can easily control the rotation speed. With the goal.

[0006]

A rotary fountain driving apparatus according to the present invention has an inner chamber and an outer chamber arranged concentrically with a rotatably supported shaft, and a radially mounted shaft. A bucket attached to the inner chamber is disposed in a first space between the body wall of the inner chamber and the shaft body, and a water passage is connected to a second space between the body wall of the inner chamber and the body wall of the outer chamber, The above-mentioned second
An inlet nozzle is provided for flowing water in the space into the first space to form a water flow field in the first space, and an outlet nozzle communicates with the first space.

[0007]

With this configuration, the water that has flowed into the second space from the water supply channel flows into the first space via the inlet nozzle, and then is discharged from the outlet nozzle. Then, a flow field of water is formed in the first space, and the water flow in the flow field pushes the bucket provided in the first space in the flow direction of the water to rotate the shaft. Further, the shaft rotates with a torque corresponding to the energy corresponding to the amount of water forming the flow field in the first space. Therefore, even if the rotation speed of the shaft body is low, the torque increases.

[0008]

FIG. 1 shows a rotary driving device 1 according to an embodiment of the present invention.
3 shows a rotary fountain to which the rotary driving device 1 is applied.
The object 4 attached to the upper end of the shaft 2 projecting upward is provided with a draining member for dropping the fountain while keeping the fountain in a predetermined shape.
A support column also serving as a water supply pipe to the apparatus, 6 is a decoration, and 7 is a support base.

FIG. 2 shows the internal structure of the rotary drive device 1 in a longitudinal section. As shown in the figure, the support column 5 is formed by concentrically arranging the inner tube 8 and the outer tube 9.
The passage between the outer pipe 9 and the outer pipe 9 is a water supply passage 10. The water supply passage 10 is connected to a discharge port of a water supply pump (not shown) through an inlet pipe (see FIG. 1) 11 or a water supply pipe (not shown) provided at a lower end of the support column 5.

A rotating shaft 12 is vertically arranged inside the inner tube 8, and the shaft 2 is fixed to an upper end of the rotating shaft 12 via a connecting member 13. An inner chamber 15 is attached to the upper end of the inner tube 8 via a fixture 14, and an outer chamber 16 is attached to an upper end of the outer tube 9 via a fixture 9 a. Both ends are rotatably supported by a bearing 17 interposed between the mounting member 14 and a bearing (not shown) interposed between the inner pipe 8 and the bearing 17.

The inner chamber 15 and the outer chamber 16 are provided concentrically with the shaft 2 rotatably supported in the above configuration. As shown in FIGS. 2 and 3, a plurality of buckets 19 are radially mounted on the shaft 2 via a mounting plate 18, and these buckets 19 are connected to the body wall 15 a of the inner chamber 15 and the shaft 2. And in a first space S1 formed between them. On the other hand, the bottom wall 16b of the outer chamber 16 is provided with a plurality of through-holes 20. Through these through-holes 20, the water supply passage 10 is connected to the body wall 15a of the inner chamber 15 and the body wall 15 of the outer chamber 16. 1
6a is connected to the second space S2 formed between the first space 6a and the second space S2.

As shown in FIG. 3, the body wall 15 of the inner chamber 15 is formed.
2, inlet nozzles 21 are provided at a plurality of locations (two locations in the example in the figure) in the circumferential direction, and the circumference of a canopy 22 closing the upper end openings of both the inner chamber 15 and the outer chamber 16 as shown in FIG. Exit nozzles 23 communicating with the first space S1 are provided at a plurality of locations (two locations in the example in the drawing) in the direction. The outlet nozzles 23 are opened at a lower level than the upper edge of the draining member 4.

The inlet nozzle 21 serves to flow the water in the second space S2 into the first space S1 to form a flow field in the first space S1. And, in the illustrated example, the first
As a measure for forming a flow field of water in the space S1,
The posture of the inlet nozzle 21 is inclined in the tangential direction of the body wall 15a in the inner chamber 15 or in a direction along the tangential direction.

In the above configuration, when the water supply pump is started and water is supplied to the second space S2 via the water supply passage 10, after the second space S2 reaches a predetermined water level, the inlet nozzle 21
, Water flows into the first space S1, and in the first space S1, the water flows in a direction indicated by an arrow A in FIG. 3 to form a flow field. And the water which formed the flow field in the 1st space S1 is
Thereafter, the water is discharged to the internal space of the draining member 4 through the outlet nozzle 23, overflows the upper edge 4a of the draining space 4, and drops while maintaining a predetermined shape.

On the other hand, the plurality of buckets 19 arranged in the first space S1 are pushed in the flow direction A by the water flow of the water flow field formed in the first space S1, and the shaft 2 is accordingly moved. It rotates together with the object 3 in the water flow direction A. Then, by performing an operation of reducing the amount of water supplied to the water supply passage 10, the amount of water flowing from the second space S2 to the first space S1 via the inlet nozzle 21 and the discharge from the first space S1 via the outlet nozzle 23. When the amount of outflow of water is reduced, the flow velocity of the water in the flow field decreases, and accordingly, the rotation speed of the shaft 2 decreases. Conversely, by performing an operation of increasing the amount of water supplied to the water supply channel 10, the first space S
When the flow rate of water into the flow field 1 and the flow rate of water discharged from the first space S1 are increased, the flow velocity of the water in the flow field increases, and accordingly, the rotation speed of the shaft 2 increases. Such water volume control can be easily performed by controlling the number of rotations of the water pump and the opening degree of the valve.
It is easy to control the rotation speed. The torque at the time of rotation of the shaft 2 has a magnitude corresponding to the energy corresponding to the amount of water forming the flow field in the first space S1. Therefore,
Even when the rotation speed of the shaft body 2 is low, the torque during rotation of the shaft body 2 increases.

In this embodiment, although the outlet nozzle 23 is provided on the canopy 22, the location of the outlet nozzle is of course not limited to this. For example, the outlet nozzle 23 is provided from the body wall 15a of the inner chamber 15 to the second space S2. May be installed at a position penetrating through to the body wall 16 a of the outer chamber 16. Further, the bucket 19 may have any shape as long as it can receive the energy of the flow field of water, and may be, for example, a flat plate or a bowl.

[0017]

As described above, the rotary driving device of the rotary fountain according to the present invention comprises the first member between the body wall of the inner chamber and the shaft.
Since the shaft is rotated using the water flow of the water flow field formed in the space and the energy of the flow field, the first
By controlling the amount of inflow and outflow water with respect to the space, the rotation speed of the shaft can be easily controlled in a wide range from high speed to low speed, and a large torque can be obtained even at low speed rotation.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view of a rotary fountain to which a rotary drive device according to an embodiment of the present invention is applied.

FIG. 2 is a partially cutaway side view showing a main part of FIG. 1 in an enlarged manner.

FIG. 3 is a cross-sectional plan view of the rotary drive device.

FIG. 4 is an explanatory diagram of a conventional example.

FIG. 5 is an explanatory diagram of another conventional example.

[Explanation of symbols]

 2 shaft body 10 water supply path 15 inner chamber 15a inner chamber body wall 16 outer chamber 16a outer chamber body wall 19 bucket 21 inlet nozzle 23 outlet nozzle S1 first space S2 second space

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B05B 3/00-3/18 B05B 17/08

Claims (1)

(57) [Claims] An inner chamber and an outer chamber are provided concentrically with a rotatably supported shaft,
A bucket radially attached to the shaft is provided in a first space between the body wall of the inner chamber and the shaft, and is sent to a second space between the body wall of the inner chamber and the body wall of the outer chamber. A water channel is connected, and an inlet nozzle is provided on the body wall of the inner chamber to allow water in the second space to flow into the first space to form a flow field of water in the first space. A rotary fountain rotation driving device, wherein an outlet nozzle is communicated.