JP7049023B1 - Rotating nozzle device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary nozzle device capable of sufficiently improving durability while rotating at high speed while ejecting high-pressure washing water. SOLUTION: A rotor 3 is rotatably fitted and mounted on a rotor shaft 2. A water supply channel 4 is formed on the rotor shaft 2. Water is supplied to the central hole 5 of the rotor 3 via the water supply channel 4. A headrace 6 is formed to guide the supplied water to the outer peripheral surface of the rotor 3. Nozzles 7 and 8 are provided to inject the water guided by the headrace 6 from the outer peripheral surface of the rotor 3. The injection directions of the nozzles 7 and 8 are inclined in the circumferential direction with respect to the radial direction of the rotor 3. Water is injected while rotating the rotor 3 in reaction to the injection. A gap 9 is formed between the outer peripheral surface of the rotor shaft 2 and the inner peripheral surface of the central hole 5 of the rotor 3. A spout 10 is provided at the tip of the gap 9. The water supplied from the water supply channel 4 is allowed to enter the gap 9 and flow to the tip side. The contact pressure between the rotor shaft 2 and the rotor 3 is suppressed, the frictional heat is cooled, the inclination of the rotor 3 is suppressed, and the rotation center line is stabilized. [Selection diagram] Fig. 3

Description

The present invention relates to a rotary nozzle device in which the injection direction of the nozzle is inclined in the circumferential direction of the rotor, and water is injected while rotating the rotor by the reaction of the injection.

Generally, a nozzle device used for cleaning an automobile or the like removes dirt by a high-pressure jet jet jet ejected from the nozzle. As such a nozzle device, the nozzle is tilted in the circumferential direction with respect to the radial direction. A rotary nozzle device which is attached to a rotor and injects washing water while rotating the rotor by the reaction of the injection may be used (for example, Patent Document 1).

Since such a rotary nozzle device can change the injection direction of the nozzle with the rotation of the rotor, it is possible to clean a wide range of parts such as an automobile.

Japanese Unexamined Patent Publication No. 2005-161156

However, since the rotary nozzle device rotates at high speed while ejecting high-pressure washing water from the nozzle, the rotor and the rotor shaft rub at high speed while applying a strong contact pressure between them, and its durability is high. May reduce sex.

An object of the present invention is to provide a rotary nozzle device capable of sufficiently improving durability while rotating at high speed while ejecting high-pressure washing water.

In order to achieve the above object, the rotary nozzle device according to the present invention includes a rotor shaft, a rotor rotatably fitted to the rotor shaft, a water supply channel formed in the rotor shaft, and a water supply channel. It is equipped with a headrace that guides the water supplied to the center hole of the rotor through the outer peripheral surface of the rotor to the outer peripheral surface of the rotor, and a nozzle that injects the water guided by the headrace from the outer peripheral surface of the rotor. Water is jetted while tilting in the circumferential direction with respect to the radial direction and rotating the rotor by the reaction of the jet, and further, between the outer peripheral surface of the rotor shaft and the inner peripheral surface of the center hole of the rotor. A gap is formed in which water supplied from the water supply channel enters, and a spout that intrudes into the gap and flows toward the tip side is provided at the tip of the gap.

According to the above configuration, a gap is formed between the outer peripheral surface of the rotor shaft and the inner peripheral surface of the central hole of the rotor to allow water supplied from the water supply channel to enter. The contact pressure between the rotor and the rotor shaft can be reduced. Moreover, the frictional heat caused by the rotor and rotor shaft rubbing at high speed due to the water entering the gap can be cooled, and in addition to reducing the contact pressure, the generation of frictional heat can be suppressed, thereby rotating the nozzle. The durability of the device can be increased.

Furthermore, since a spout is provided at the tip of the gap between the rotor shaft and the rotor to eject the water that has entered the gap toward the tip side, the water that has entered the gap can flow to the tip side with sufficient force. .. As a result, the inclination of the rotor with respect to the rotor shaft due to the formation of a gap between the rotor shaft and the rotor can be suppressed, and the rotation center line of the rotor can be stabilized. Moreover, since the water flowing toward the tip side through the gap between the rotor shaft and the rotor is ejected from the ejection port, the ejection port can be appropriately used as a nozzle different from the nozzle on the outer peripheral surface of the rotor.

Here, the principle that the inclination of the rotor with respect to the rotor shaft is suppressed by the water flowing toward the tip side in the gap between the rotor and the rotor shaft will be described. First, due to the tilting of the rotor, the gap between the rotor and the rotor shaft is on the opposite side of the rotation center line, with a wide tip along the rotation center line and a narrow tip along the rotation center line. The narrowed part of is formed. Of the widened and narrowed parts, in the widened part, the flow path area becomes larger toward the downstream side of the flow of water that has entered the gap, whereas in the narrowed part, the flow path becomes larger toward the downstream side of the water flow. Since the area becomes smaller, high-pressure water flows through the narrowed portion with sufficient force to widen the gap in the narrowed end and return the tilt of the rotor.

Further, even if a rotation drive nozzle and a brake nozzle are provided as nozzles, and the inclination angle of the brake nozzle in the circumferential direction with respect to the radial direction of the rotor in the injection direction is set smaller than that of the rotation drive nozzle. good.

According to this configuration, a rotation drive nozzle in which the tilt angle in the circumferential direction with respect to the radial direction of the rotor in the injection direction is set to be large and a brake nozzle in which the tilt angle in the injection direction is set to be small are provided, so that the tilt angle is large. While the rotor is stably rotated by the injection of the rotation drive nozzle, it is possible to suppress the rotation speed of the rotor from becoming excessively high due to the injection of the brake nozzle having a small inclination angle. Here, the injection direction of the brake nozzle may be not only the direction in which the inclination angle is reduced but also the direction in which the inclination angle is 0 degrees (that is, the radial direction), and the direction in which the inclination angle is negative. (That is, the direction of inclination opposite to the rotation drive nozzle) may be used.

In this case, by setting the rotary drive nozzle and the brake nozzle in asymmetric injection directions having different inclination angles, a force for tilting the rotor acts on the rotor shaft, and a partial contact pressure between the two acts. However, the contact pressure and frictional heat can be suppressed by the water that has entered the gap. Moreover, the water that has entered the gap between the rotor and the rotor shaft flows to the tip side with sufficient force, so that the injection directions of the rotary drive nozzle and the brake nozzle are set asymmetrically, and the inclination of the rotor with respect to the rotor shaft is set. It can be suppressed and the rotation center line of the rotor can be stabilized.

As described above, according to the present invention, a gap is formed between the outer peripheral surface of the rotor shaft of the rotary nozzle device and the inner peripheral surface of the central hole of the rotor to allow water supplied from the water supply channel to enter, and further. The water is made to flow toward the tip side with sufficient force to be ejected from the spout at the tip. As a result, the contact pressure between the rotor and the rotor shaft can be reduced, the generation of frictional heat can be suppressed, and the center line of rotation of the rotor can be stabilized, while high-pressure water is ejected from the nozzle. While rotating the rotor at high speed, the durability of the rotary nozzle device can be sufficiently improved.

Perspective view from the front side of the rotary nozzle device according to the present invention. Perspective view from the back side of the rotary nozzle device according to the present invention. Longitudinal section of rotary nozzle device AA cross-sectional view of FIG. The figure explaining how to stabilize the rotation center line of a rotor

Hereinafter, a mode for carrying out the rotary nozzle device according to the present invention will be described with reference to the drawings.

As shown in FIGS. 1 to 4, the rotary nozzle device 1 injects high-pressure washing water from the nozzle while rotating to remove dirt from an automobile or the like, with respect to the rotor shaft 2 and the rotor shaft 2. The washing water supplied to the central hole 5 of the rotor 3 via the rotor 3 rotatably fitted and mounted, the water supply channel 4 formed on the rotor shaft 2, and the water supply channel 4 is applied to the outer peripheral surface of the rotor 3. A rotary drive nozzle 7 and a brake nozzle 8 are provided as a nozzle for injecting the guiding headrace 6 and the washing water guided by the headrace 6 from the outer peripheral surface of the rotor 3, and the rotor 3 is rotated while being driven. High-pressure washing water is ejected from the nozzle 7 and the braking nozzle 8. Further, the injection direction of the rotation drive nozzle 7 is inclined in the circumferential direction with respect to the radial direction of the rotor 3 so that the rotor 3 is rotated by the reaction of the injection, and the outer peripheral surface of the rotor shaft 2 and the center hole of the rotor 3 are formed. A gap 9 is formed between the inner peripheral surface of the water supply channel 4 and the washing water supplied from the water supply channel 4 to enter, and a spout 10 for ejecting the washing water flowing to the tip side is provided at the tip of the gap 9. There is.

The rotor shaft 2 has a columnar shape in which a large-diameter base end portion 2a is fixed to a frame body 11, and a water supply channel 4 is formed in a range extending from the base end to the outer peripheral surface near the center in the length direction. .. The water supply channel 4 extends from the water supply port 12 on the base end surface of the rotor shaft 2 to the vicinity of the center in the axial direction along the central axis, and further extends in the radial direction while branching in four directions, near the center in the axial direction of the rotor shaft 2. To the outer peripheral surface of.

The rotor 3 has a central hole 5 and has a substantially truncated cone shape that expands toward the tip side. A bearing 13 is provided on the inner peripheral surface of the central hole 5 and is rotatably fitted to the rotor shaft 2. It will be installed. The rotor 3 has a nut 14 bolted to the tip of the rotor shaft 2 and a sliding plate 15 arranged on a stepped surface on the front side of the base end portion 2a of the rotor shaft 2 so as to move slightly in the front-rear direction. Retained while allowing.

The nut 14 has a larger diameter than the central hole 5 of the rotor 3 and is set to a size that fits into the recess 16 formed in the peripheral edge of the opening on the tip side of the central hole 5, so that the rotor 3 can be pulled out from the rotor shaft 2. While restricting, the spout 10 is formed by cutting out a plurality of places on the outer peripheral portion.

The inner diameter of the bearing 13 inside the center hole 5 of the rotor 3 is set to be larger than the outer diameter of the rotor shaft 2, and a gap 9 is formed between the outer peripheral surface of the rotor shaft 2 and the inner peripheral surface of the rotor 3. It has become like. In the central hole 5, a peripheral groove 18 having an inner peripheral surface recessed in an annular shape is formed so that the position in the axial direction is aligned with the discharge port 17 of the water supply channel 4, and the four discharge ports 17 of the water supply channel 4 are formed. It is designed to accept the wash water supplied from.

The headrace 6 is formed so as to reach the outer peripheral surface of the rotor 3 from two places on the bottom of the peripheral groove 18, and a rotation drive nozzle 7 and a brake nozzle 8 are screwed and mounted at the outlets of the headraces 6. , The washing water received by the peripheral groove 18 is ejected from the rotary drive nozzle 7 and the brake nozzle 8.

The rotary drive nozzle 7 and the brake nozzle 8 have a right-angled cylindrical shape provided with a small-diameter injection portion 19 at the tip thereof, and the injection direction thereof is substantially parallel to the outer peripheral surface of the rotor 3 extending toward the tip side. The base end is screwed and attached to the outlet of the headrace 6 of the rotor 3 so as to face.

The rotation drive nozzle 7 is set so that the injection direction is inclined in the circumferential direction with respect to the radial direction of the rotor 3 on the plane orthogonal to the central axis thereof, and the brake nozzle 8 is set on the plane orthogonal to the central axis thereof. , The injection direction is set to an inclination angle that is almost parallel to the radial direction of the rotor 3. That is, the brake nozzle 8 is set so that the inclination angle in the circumferential direction with respect to the radial direction of the rotor 3 in the injection direction is smaller than that of the rotation drive nozzle 7.

According to the above configuration, by supplying high-pressure washing water to the water supply port 12 on the base end surface of the rotor shaft 2, the washing water is discharged from the discharge port 17 on the outer peripheral surface of the rotor shaft 2 through the water supply channel 4. It penetrates into the peripheral groove 18 of the rotor 3. A part of the high-pressure washing water that has entered the peripheral groove 18 has entered the gap 9 between the outer peripheral surface of the rotor shaft 2 and the inner peripheral surface of the rotor 3, and most of the remaining water has entered the headrace 6. It is injected from the rotary drive nozzle 7 and the brake nozzle 8 through the nozzle.

The washing water that has entered the gap 9 suppresses the contact pressure between the outer peripheral surface of the rotor shaft 2 and the inner peripheral surface of the rotor 3 and cools the frictional heat to improve the durability of the rotary nozzle device 1.

The washing water jetted from the rotary drive nozzle 7 and the brake nozzle 8 is jetted diagonally forward so as to spread in the radial direction, and by the reaction thereof, the rotor 3 is moved backward and pressed against the sliding plate 15. As a result, the bottom surface of the recess 16 of the opening on the tip end side of the rotor 3 is separated from the nut 14, and the washing water can be easily ejected from the ejection port 10 formed in the nut 14.

Since the washing water ejected from the rotation driving nozzle 7 is inclined in the circumferential direction of the rotor 3, it becomes a high-pressure jet and is ejected, and the rotor 3 is rotated by the reaction. On the other hand, since the washing water ejected from the brake nozzle 8 has a small inclination in the circumferential direction of the rotor 3, it becomes a high-pressure jet and is ejected while suppressing the rotation of the rotor 3. As a result, the rotor 3 does not rotate at an excessively high speed, but rotates while sliding on the sliding plate 15 at a stable speed, and sprays high-pressure washing water over a wide range of an automobile or the like for cleaning.

In this case, in addition to forming a gap 9 between the rotor shaft 2 and the rotor 3, the rotation center line 20 of the rotor 3 is different due to the different inclination angles of the rotation drive nozzle 7 and the brake nozzle 8. The force that tries to tilt it acts. The washing water that has entered the gap 9 flows toward the tip side with sufficient force against the force that tends to tilt the rotation center line 20 of the rotor 3, and is ejected from the ejection port 10 to tilt the rotor 3 with respect to the rotor shaft 2. Is suppressed, and the rotation center line 20 of the rotor 3 becomes stable. Further, by ejecting the washing water from the ejection port 10, the central portion of the washing range can also be washed.

Here, with reference to FIG. 5, a state in which the inclination of the rotor 3 with respect to the rotor shaft 2 is suppressed by the washing water flowing to the tip side in the gap 9 between the rotor shaft 2 and the rotor 3 will be described.

First, as the rotor 3 is tilted, the gap 9 between the rotor shaft 2 and the rotor 3 is rotated on the opposite side of the rotation center line 20 with the widened portion 21 along the rotation center line 20. A narrow-tipped portion 22 is formed along the center line 20.

Of the widened portion 21 and the narrowed portion 22, in the widened portion 21, the flow path area becomes larger toward the downstream side of the flow 21a of the washing water that has entered the gap 9, whereas in the narrowed portion 22, the washing water is washed. The flow path area becomes smaller toward the downstream side of the flow 22a. When the high-pressure washing water flows through such a narrowed portion 22 with sufficient force, the narrowed gap 9 is expanded and the rotation center line 20 of the rotor 3 approaches parallel to the rotor shaft 2. ..

The present invention is not limited to the above embodiment, and modifications can be made as appropriate within the scope of the present invention. For example, the brake nozzle 8 may not only be set to have a small inclination of the rotor 3 in the circumferential direction, but may also be inclined in the direction opposite to the rotation drive nozzle 7. Further, the brake nozzle 8 can be omitted, and a third nozzle can be added in addition to the rotary drive nozzle 7 and the brake nozzle 8 in addition to the ejection port 10.

Further, the washing water flowing through the gap 9 toward the tip side and ejected from the ejection port 10 may be any as long as it stabilizes the rotation center line 20 of the rotor 3, and it is not always necessary to wash the automobile or the like. Further, not only the ejection port 10 may be formed by cutting out a plurality of locations on the outer peripheral portion of the nut 14, but also the entire circumference on the outer peripheral side of the nut 14 may be used as the ejection port.

1 Rotating nozzle device 2 Rotor shaft 2a Base end 3 Rotor 4 Water supply channel 5 Central hole 6 Headrace 7 Rotating drive nozzle 8 Brake nozzle 9 Gap 10 Spout 11 Frame 12 Water supply port 13 Bearing 14 Nut 15 Sliding plate 16 Recess 17 Discharge port 18 Circumferential groove 19 Injection part 20 Rotation center line 21 Wide tip 21a Flow of wash water 22 Narrow tip 22a Flow of wash water

Claims (2)

The rotor shaft, the rotor rotatably fitted to the rotor shaft, the water supply channel formed in the rotor shaft, and the water supplied to the center hole of the rotor via the water supply channel are supplied to the rotor. It is provided with a headrace leading to the outer peripheral surface and a nozzle for injecting water guided by the headrace from the outer peripheral surface of the rotor, and the injection direction of the nozzle is inclined in the circumferential direction with respect to the radial direction of the rotor to inject. It is a rotary nozzle device that injects water while rotating the rotor in reaction.
A gap is formed between the outer peripheral surface of the rotor shaft and the inner peripheral surface of the central hole of the rotor to allow water supplied from the water supply channel to infiltrate. A rotary nozzle device characterized by being provided with an outlet that ejects water flowing toward the tip side . A rotation drive nozzle and a brake nozzle are provided as the nozzle, and the brake nozzle is set so that the inclination angle in the circumferential direction with respect to the radial direction of the rotor in the injection direction is smaller than that of the rotation drive nozzle. The rotary nozzle device according to claim 1.

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