JPH1047002A - Ring motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of solid friction to a bearing part during high speed rotation of a rotor. SOLUTION: A ring motor comprises a nozzle 2b supported on a shaft 1 and injection a fluid pressure at an angle approximately equal to the direction a tangential line; a ring rotor 5 arranged at the periphery of the nozzle 2b and receiving a fluid pressure injected through the nozzle 2b by an arcuate blade 5b arranged at an inner peripheral part to effect high speed rotation; plane parts 2c and 4a arranged on both sides of the ring rotor 5 approximately paralleling both sides of the blade 5b with respective fine gaps therebetween; and a nozzle plate 2 and a nozzle cover 4 having slopes 2d and 4b positioned opposite to each other so that a gap 5c between the inner peripheral side and the slope 5a of the rotor 5 is wide and the gap between the outer peripheral side and the slope is gradually decreased. The outer peripheral part of the blade 5b is slightly communicated with the gap 5c and further, it has a slide contact surface 6a making slide contact with the slope 5a of the ring rotor 5. A balance plate 6 is provided to be positioned on the outer peripheral side of the gap 5c and make slide contact with the slope 5a and form a fluid film between the slide contact surface 6a and the balance plate, and since no solid contact is made, a power loss hardly inccurs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a ring motor which rotates at high speed by fluid pressure.

[0002]

2. Description of the Related Art Conventionally, there are various types of motors that rotate at a high speed by using fluid pressure of air, steam, gas, or the like. One of them is, for example, (a) and (b) of FIG. , There is a turbine shown in FIG. The turbine has a rotor b on which a number of blades a are arranged on an outer peripheral portion, and the rotor is rotated at a high speed by injecting fluid pressure such as compressed air, steam, or gas from the nozzle c to the blade a. And power is obtained.

[0003]

However, in the above-mentioned conventional turbine, the rotating shaft d provided at the center of the rotor b is supported by a complicated and high-precision bearing and a shaft sealing device for sealing fluid pressure. Therefore, when the rotor b rotates at a high speed, solid friction occurs in the bearings and the shaft sealing device, resulting in a large power loss. Particularly in a low-output turbine, the proportion of mechanical loss due to the solid friction is large and cannot be ignored. However, since a complicated structure of the blade a, the nozzle c, the bearing, the shaft sealing device, and the like are required, there is a problem in that a high manufacturing technique is required and the cost is high.

SUMMARY OF THE INVENTION The present invention has been made to solve such conventional problems, and is a small ring motor capable of efficiently recovering power from a heat energy source such as solar heat, geothermal heat, garbage incineration heat, and industrial waste heat. The purpose is to provide.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a nozzle which is supported by a shaft and ejects a fluid pressure at an angle close to a tangential direction, and is provided around the nozzle. A ring rotor that rotates at a high speed by receiving the ejected fluid pressure on an arc-shaped blade provided on an inner peripheral portion, and is provided on both sides of the ring rotor, and is substantially parallel to both sides of the blade with a small gap. A nozzle plate and a nozzle cover having an inclined surface facing the flat surface and the inclined surface of the ring rotor so as to form a gap whose inner peripheral side is widened and the outer peripheral side is gradually narrowed; A balance plate that has a sliding contact surface that is in contact with the fluid, and that is located on the outer peripheral side of the gap and that flows out of the gap, and that forms a fluid film between the inclined surface and the sliding surface. It is.

[0006]

According to the above construction, the ring rotor is rotated at a high speed by the fluid pressure ejected from the nozzle toward the arc-shaped blade of the ring rotor, but the blades of the nozzle plate and the nozzle cover provided on both sides of the ring rotor are rotated. A flat portion that is substantially parallel to both sides of the blade with a narrow gap suppresses outflow of fluid pressure, so that fluid pressure acting on the blade can be used efficiently.

[0007] Furthermore, the gap formed between the inclined surfaces on both sides of the ring rotor and the inclined surfaces of the nozzle plate and the nozzle cover is wide on the inner peripheral side and is gradually narrowed on the outer peripheral side. Since the fluid film is formed between the sliding surface and the inclined surface of the ring rotor after reaching the sliding surface, the ring rotor is supported by the fluid film, and the ring rotor does not come into solid contact. There is almost no loss.

[0008]

Embodiments of the present invention will be described in detail with reference to the drawings shown in FIGS. FIG. 3 is a longitudinal sectional view of the ring motor, and FIG. 4 is a sectional view taken along line BB of FIG.

In these figures, reference numeral 1 denotes an axis, in which a fluid pressure introducing hole 1a opening at one end side is formed. The fluid pressure introducing hole 1a is, as shown in FIG.
Are communicated with a plurality of primary swirl injection holes 1b provided in the tangential direction of.

[0010] In the drawing, reference numeral 2 denotes a nozzle plate fitted on the outer peripheral portion of the shaft 1. The nozzle plate 2 is combined with a nozzle cover 4 via an adjusting shim 3 to thereby form the shaft 1 as shown in FIG. Is formed around the annular fluid passage 2a and a spiral nozzle 2b outside the annular fluid passage 2a.

On the opposing surfaces of the nozzle plate 2 and the nozzle cover 4, a flat portion 2 substantially parallel to the inner peripheral side is provided.
c, 4a, and inclined surfaces 2d, 4b that are inclined outward from the flat portions 2c, 4a toward the outer periphery.

On the other hand, reference numeral 5 in the drawing denotes a ring rotor provided so as to surround the outer peripheral portions of the nozzle plate 2 and the nozzle cover 4. The ring rotor is formed so that the width on the outer peripheral side is gradually increased from the inner peripheral side. On both sides, inclined surfaces 5a that are inclined in a tapered shape from the inner peripheral side to the outer peripheral side are formed,
As shown in FIG. 4, a large number of arc-shaped blades 5b are formed on the inner peripheral surface at equal intervals in the circumferential direction.

The two sides of the blade 5b are flat portions 2 formed on the inner peripheral side of the nozzle plate 2 and the nozzle cover 4.
c, 4a, with a small gap therebetween, and a left-right symmetrical gap 5c formed by the inclined surfaces 5a on both sides of the ring rotor 5 and the respective inclined surfaces 2d, 4b of the nozzle plate 2 and the nozzle cover 4. The inclined surface 5a of the ring rotor, the inclined surface 2d of the nozzle plate 2, and the inclined surface 4 of the nozzle cover 4.
By changing the angle of b, the gap on the inner peripheral side is widened and gradually narrowed toward the outer peripheral side as shown in FIG. 3, so that the outer peripheral end reaches the sliding contact surface 6a of the balance plate 6. It has become

The balance plate 6 is provided on both sides of the ring rotor 5 so as to be bilaterally symmetric, has some elasticity and flexibility, and is formed of plastic having a small coefficient of friction. Ring rotor 5
A precision arc-shaped sliding contact surface 6a is formed on the surface opposite to by a means such as chamfering, and this sliding contact surface 6a
An inclined shim 5 a formed on both sides of the ring rotor 5 is in linear contact with the circumferential direction, and the surface pressure of the sliding contact surface 6 a is adjusted by an adjusting shim interposed between the nozzle plate 2 and the nozzle cover 4. 3 can be adjusted.

A balance plate retainer 8 is provided outside each of the balance plates 6. In addition,
In the drawing, reference numeral 10 denotes an end plate fixed to the other end of the shaft 1 by bolts 11, and reference numeral 13 denotes an O-ring interposed between the outer peripheral surface of the shaft 1 and the nozzle plate 2 and the nozzle cover 4.

Next, the operation of the ring motor configured as described above will be described. When a fluid pressure, such as compressed air, is supplied from one end of the shaft 1 into the fluid pressure guide hole 1a from a fluid pressure supply source (not shown), the fluid pressure is changed to a primary pressure pierced in the tangential direction of the fluid pressure guide hole 1a. The fluid is injected into the fluid passage 2a from the swirling injection hole 1b, and is guided to the spiral nozzle 2b while swirling along the outer periphery of the shaft 1.

After being rectified by the nozzle 2b, the nozzle plate 2 and the nozzle cover 4 are angled closer to a tangent.
The nozzle 5b is jetted from the annular groove 5d formed between the nozzle 2b and the blade 5b of the ring rotor 5, whereby the ring rotor 5 is rotated at high speed. That is, both side surfaces of the blade 5b provided on the inner peripheral surface of the ring rotor 5 have a slight angle or are formed so as to be substantially parallel to each other, and are formed by the nozzle plate 2, the nozzle cover 4, and the outer periphery of the nozzle 2b. The annular groove 5d is assembled so as to maintain a very narrow gap, and a small part of the outer peripheral portion of the blade 5b is communicated with the air gap 5c, and is injected into the blade 5b to rotate the ring rotor 5. The fluid pressure after the flow is configured to flow into the gap 5c. Therefore, by suppressing the fluid pressure ejected from the side surface of the blade 5b, the fluid pressure acting on the blade 5b can be used more efficiently.

The fluid pressure rotating the ring rotor 5 rotates in the gap 5c and slides on the sliding surface 6 of the balance plate 6 in sliding contact with the inclined surfaces 5a on both sides of the ring rotor 5.
a, the outer peripheral side of the balance plate 6 is surrounded outwardly, and a small gap is formed between the ring rotor 5 and the balance plate 6 where the fluid pressure and the contact pressure are balanced. The high-speed rotation of the ring rotor 5 is supported by the fluid film formed by the fluid pressure, and at the same time, the flow velocity of the fluid pressure is accelerated, and the tangential component force of the fluid passing through the gap is reduced by the ring rotor. The torque of 5 is doubled.

On the other hand, when the supply of the fluid pressure is stopped, no fluid passes through the gap between the sliding surface 6a of the balance plate 6 and the ring rotor 5, so that the balance plate 6 returns to its original state by its own elasticity. , Which slides on the inclined surface 5a of the ring rotor 5 and functions as a normal slide bearing to maintain the rotation center of the ring rotor 5, thereby avoiding the unstable rotation state at the start and stop of rotation peculiar to the fluid bearing. can do.

In the embodiment described above, the fluid pressure is, for example, compressed air.
It may be an incompressible fluid such as a liquid.

The primary swirl injection hole 1b of the shaft 1 may be omitted, and the balance plate 6 is made of a low friction material having no elasticity and flexibility. If a small gap is formed in advance, sufficient care and skill are required for the driving operation at the time of starting and stopping, but the overall structure can be further simplified.

[0022]

As described in detail above, the present invention provides a flat portion that is substantially parallel to both side surfaces of an arc-shaped blade formed on the inner peripheral portion of a ring rotor with a small gap therebetween. , The fluid pressure ejected from the nozzle toward the blade is suppressed by the flat portion, so that the fluid pressure efficiently acts on the blade. This allows the fluid pressure ejected from the nozzle to be used effectively,
High-speed rotation can be easily obtained even with a small fluid pressure.

Further, since a gap is provided between the inclined surfaces on both sides of the ring rotor and the inclined surfaces of the nozzle plate and the nozzle cover, the inner circumferential side is widened and the outer circumferential side is gradually narrowed. The fluid pressure that reaches the gap accelerates the flow velocity and reaches the sliding surface of the balance plate, so that stable high-speed rotation of the ring rotor can be easily obtained,
Since a fluid film is formed between the sliding surface of the balance plate and the inclined surface of the ring rotor, and the ring rotor is supported by the fluid film, solid friction does not occur in the bearing portion of the ring rotor, As a result, since there is almost no mechanical loss, it is most suitable for small- and medium-scale power sources that make effective use of heat energy sources such as solar heat, geothermal heat, and refuse incineration heat.

Further, since the ring rotor has no fixed contact, there is no need for lubrication, so that there is no fear that the bearing portion will seize due to lack of lubricating oil, and there is no need for lubrication, so maintenance is easy. .

By arranging a permanent magnet body on the outer periphery of the ring rotor and an electromagnetic induction coil therearound, a generator without bearings can be obtained. By incorporating the ring motor and the generator into various electric devices, electronic devices, medical devices, production machines, and the like, it can be used as a high-speed drive source that is easy to maintain.

[Brief description of the drawings]

FIG. 1A is an explanatory view showing a conventional turbine. (B) It is sectional drawing which follows the AA line of (a) of FIG.

FIG. 2 is a schematic view of a conventional turbine.

FIG. 3 is a longitudinal sectional view of the ring motor according to the embodiment of the present invention.

FIG. 4 is a sectional view taken along line BB of FIG. 3;

[Explanation of symbols]

 1 shaft body 1b nozzle 2 nozzle plate 2c flat surface 2d inclined surface 4 nozzle cover 4a flat surface portion 4b inclined surface 5 ring rotor 5a inclined surface 5b blade 5c air gap 6 balance plate 6a sliding contact surface

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[Procedure amendment]

[Submission date] September 19, 1996

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

FIG. 3

Claims (1)

[Claims] 1. A nozzle (2b) supported on a shaft (1) and emitting a fluid pressure at an angle close to a tangential direction, and the nozzle (2b)
A ring rotor (5) provided around the ring rotor (5), which receives fluid pressure ejected from the nozzle (2b) on an arc-shaped blade (5b) provided on an inner peripheral portion and rotates at a high speed, and the ring rotor (5). And flat portions (2c), (4a) and a ring rotor substantially parallel to both sides of the blade (5b) with a small gap.
The nozzle plate (2) having inclined surfaces (2d) and (4b) opposed to the inclined surface (5a) of (5) so as to form a gap (5c) in which the inner peripheral side is wide and the outer peripheral side is gradually narrowed. ) And a nozzle cover (4), the outer periphery of the blade (5b) is slightly in communication with the gap (5c), and is further in sliding contact with the inclined surface (5a) of the ring rotor (5). Surface (6a), and the space
A balance plate (6) which is located on the outer peripheral side of (5c) and forms a fluid film between the inclined surface (5a) and the sliding surface (6a) by the fluid pressure flowing out of the gap (5c). A ring motor comprising: