JPH11294538A - Composite material rotor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the occurrence of a crack on a ring due to a high-speed rotation by forming adhesive layers mitigating the stress in the radial direction as middle layers of the ring in a composite material rotor having the ring wound with fibers dipped in a resin in many layers and a hub fitted to the inner periphery of the ring. SOLUTION: A composite material rotor 1 usefully mounted on an automobile as a constituting member for a flywheel battery is constituted of a ring 2 and a hub 3. Fibers dipped in a resin are wound in many layers to form the ring 2, and adhesive layers 4 mitigating the stress in the radial direction are formed at two positions shown by broken lines and at one position shown by a solid line as middle layers. Fibers with different characteristics are wound on the inside and outside across the solid line 5 portion in the ring 2. The hub 3 is constituted of a rotary shaft 6 and a tube body 7, and the tube body 7 has a connecting member 8 at one end. A lug section 9 biting into the inner periphery of the ring 2 is formed on the outer periphery of the tube body 7, and a mass adding member 10 made of a high-specific gravity material is provided on the inner periphery of the tube body 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite rotor suitable for high-speed rotation and miniaturization, for example, a composite rotor useful as a component for a flywheel battery and mounted on an automobile.

[0002]

2. Description of the Related Art In recent years, it has been studied to mount a battery using a flywheel (hereinafter, referred to as a flywheel battery) in an automobile instead of a chemical battery. In a flywheel battery, surplus energy is stored as mechanical energy of rotation of a flyhole, and when electrical energy is needed, a generator is rotated by rotation of the flyhole to generate electricity.

FIGS. 9 and 10 show flywheels.
As shown in FIG. 1, a composite rotor 100 in which a ring 101 formed by winding fibers immersed in a resin in multiple layers is mounted on the outer periphery of a hub 102 is promising.

When the composite rotor 100 is used for a flywheel battery mounted on an automobile, it is required to reduce the size and to rotate at a high speed in order to store a sufficiently large mechanical energy.

In order to reduce the size, the inner diameter of the ring 101 is required to be considerably smaller than the outer diameter. For example, the ratio of the inner diameter to the outer diameter is set to 0.75 or less. Further, in order to store sufficiently large mechanical energy, it is required to withstand extremely high-speed rotation, and for example, a peripheral speed of 720 m / s or more is targeted.

However, when the ratio of the inner diameter to the outer diameter is as small as 0.75 or less, the stress in the radial direction partially increases during rotation, and the stress further increases at high speed rotation. Thus, the crack 103 may be generated.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a composite rotor suitable for high-speed rotation and miniaturization.

[0008]

According to another aspect of the present invention, there is provided a composite rotor comprising: a ring formed by winding fibers immersed in a resin in multiple layers; and a ring mounted on an inner periphery of the ring. In a composite rotor having a hub formed, a layer of an adhesive material for relieving radial stress is formed on a layer in the middle of the ring, and the hub is provided on a rotating shaft and an inner periphery of the ring. It has a cylindrical body attached and one end connected to the rotating shaft.

The composite rotor according to the second aspect of the present invention is characterized in that the cylindrical body has a protrusion on its outer periphery that cuts into the inner periphery of the ring.

A composite rotor according to a third aspect of the present invention is characterized in that the thickness of the cylindrical body is thinner at one end connected to the rotating shaft than at other portions.

A composite material rotor according to a fourth aspect of the present invention is characterized in that a connecting member for connecting one end of the cylindrical body and the rotary shaft has a conical shape concave inward in the axial direction.

According to a fifth aspect of the present invention, in the composite rotor, the rotating shaft has a stepped portion in which a connecting member connecting one end of the cylindrical body and the rotating shaft abuts from the outside in the axial direction. Is connected to the step portion by a screw, and a step portion with which the head of the screw comes into contact is formed in a hole formed in the connecting member.

According to a sixth aspect of the present invention, in the composite rotor, a notch is formed on an outer surface of the connecting member connecting the one end of the cylindrical body and the rotating shaft, which is located on an inner side of the connecting member, in the axial direction. It is characterized by being.

According to a seventh aspect of the present invention, there is provided a composite rotor having a mass adding member mounted on an inner periphery of the cylindrical body.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A composite rotor according to an embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 conceptually shows a composite rotor according to an embodiment of the present invention. The rotor 1 includes a ring 2 and a hub 3.

As will be described in detail later, as shown in FIG. 1, the ring 2 is formed by winding a fiber immersed in a resin into multiple layers, and further includes a layer of an adhesive material (a layer in the middle) for relaxing the stress in the radial direction. (Interleaf) 4 are formed at two places indicated by broken lines and at one place indicated by solid lines 5. In the ring 2 of this example, fibers having different characteristics inside and outside are wound with the solid line 5 as a boundary.

As shown in FIG. 1, the hub 3 is made of metal and comprises a rotating shaft 6 and a cylindrical body 7, which will be described in detail later. The cylinder 7 has a connecting member 8 connected to the rotating shaft 6 at one end. In addition, a projection 9 that cuts into the inner peripheral surface of the ring 2 is formed on the outer periphery of the cylindrical body 7. Further, a mass adding member 10 made of a material having a high specific gravity such as lead is provided on the inner periphery of the cylindrical body 7 as shown in FIG.

Referring to FIG. 3, a manufacturing procedure of the ring 2 will be described. (1) As shown in FIG. 3 (a), a fiber 13 soaked in resin is compressed on a bobbin 12 attached to a mandrel 11 at an appropriate temperature (for example, about 60 to
(70 ° C). (2) Next, when a suitable winding layer is formed, as shown in FIG. 3B, a film-like adhesive 14 is wound once, and the fiber 13 is continuously wound on the adhesive layer 14. Turn. The ring 2 is completed by repeating the winding of the fibers 13 and the winding of the film-shaped adhesive layer 14 as appropriate. (3) If necessary, as shown in FIG. 3 (c), the heat-shrinkable tape 15 is wound to perform a terminal treatment. (4) If necessary, as shown in FIG. 3D, the outer diameter of the ring 2 is set to a predetermined dimension, for example, an outer diameter of
m, inner diameter φ100mm, height 80mm. (5) Next, as shown in FIG. 3 (e), the hub 3 is assembled to the inner diameter portion of the ring 2 by cold fitting to obtain the composite rotor 1. (6) Next, as shown in FIG. 3F, the composite material rotor 1 is rotated to perform balance adjustment.

The layer in which the film-like adhesive 14 is inserted is a layer in which the radial stress exceeds an allowable value at the desired high-speed rotation. By inserting the film-like adhesive 14, the inside and outside of the ring 2 become the adhesive layer 14. Because of the bonding, the radial stress is divided and relieved by the adhesive layer 14. For example, a layer at the center of the outer periphery and the inner periphery, a film-like adhesive layer 1
The film-like adhesive layer 14 is inserted into the respective central layers of the two parts separated by 4. If necessary, the film-like adhesive layer 14 is further inserted into a central layer of a portion partitioned by the film-like adhesive layer 14.

Next, referring to FIGS. 4 and 5, the structure of the hub 5 will be described below.

The hub 3 is made of metal, and comprises a rotating shaft 6 and a cylinder 7 as shown in FIG.

The cylinder 7 has a connecting member 8 connected to the rotating shaft 6 at one end. The other end of the cylinder 7 is not connected to the rotating shaft 6 but is a free end. Since the other end of the cylindrical body 7 is a free end, the cylindrical body 7 slightly expands and deforms outward during rotation, and by pressing the ring 2 in the radial direction, the radial stress is relieved and the ring 2 is moved inward. Holds securely from the circumferential side to prevent idling.

On the outer periphery of the cylinder 7, a projection 9 is provided on the inner periphery of the ring 2, for example, with a height of 0.1 mm. It is formed on the entire circumference with dimensions of several mm and a length of 20 mm in the axial direction. The protrusion 9 cuts into the inner peripheral surface of the ring 2, thereby preventing the relative movement of the ring 2 and the hub 3 in the axial direction. If the projections 9 are formed at equal intervals at intervals in the circumferential direction, it also helps to prevent idling.

As shown in FIG. 5, a cylindrical mass adding member 10 made of a material having a higher specific gravity than the cylinder 7, for example, lead, is provided on the inner periphery of the cylinder 7. Since the mass adding member 10 is located on the inner circumference of the cylinder, the mass adding member 10 pushes the cylinder 7 outward during rotation, and expands and deforms further outward than when the cylinder 7 is alone, thereby rotating the ring 2 in the radial direction. Push. Therefore, the stress in the radial direction is further alleviated, and the ring 2 is more securely held from the inner peripheral side to prevent idling. In the example shown in FIG.
Although a large number of slits are provided in the cylindrical mass adding member 10, an appropriate mass is ensured as long as the overall weight of the rotor does not become too large. In addition to the cylinder, the mass adding members may be provided at equal intervals at intervals in the circumferential direction.

The thickness of the cylindrical body 7 is made thinner at one end 16 connected to the rotating shaft 6 than at other portions.
That is, assuming that the thickness of the one end portion 16 is t1 and the thickness of the other portions is t2, t1 <t2. Thereby, even when the length L1 of the one end portion 16 is shortened, the cylindrical body 7 is easily expanded and deformed outward during rotation. Further, when L1 is short, the deformation of the cylindrical body 7 is less likely to affect the coupling with the rotating shaft 6, and the axial dimension of the entire rotor is reduced.

The connecting member 8 of the cylindrical body 7 has a conical shape concave inward in the axial direction. As a result, even if the overall length of the rotating shaft 6 is shortened, the shaft length L2 of the portion protruding from the connecting member 8 is secured to a length sufficient for connecting to another device by a shaft end connecting member such as a chuck. can do. If the total length of the rotating shaft 6 is short, the size of the entire rotor is reduced and the rigidity is improved.

The connecting member 8 of the cylindrical body 7 is formed on the rotary shaft 6 with a step 17 in which the connecting member 8 abuts from the outside in the axial direction, and the connecting member 8 is connected to the step 17 by a screw 18. Further, a hole 19 through which the screw 18 passes is formed in the connecting member 8, and a step portion 20 with which the head of the screw 18 abuts is formed in the hole 19. Thereby, the thickness of the connecting member 8 at the step portion 20, that is, the dimension a under the screw becomes smaller, so that the rigidity of both bending and thrust is improved.

A cut-out portion 21 is formed in a portion of the cylindrical body 7 near the inner periphery of the connecting member 8 on a surface desired outside in the axial direction. This causes the inner surface to be deformed in the opposite direction during rotation, thereby preventing an increase in the gap at the fitting portion due to centrifugal force.

When the overall length of the rotor may be slightly longer, the connecting member 8 may be concave inward in the axial direction opposite to that of FIG. 4 as shown in FIG. 6, or may be flat (not shown). You may do it.

Next, an example in which the composite rotor 1 of the present invention is used for a fly-hole battery for an automobile will be described with reference to FIGS. In FIG. 7, a flyhole battery 23 is mounted on an automobile 22. The fly-hole battery 23 is shown in FIG.
As shown in FIG.
It has two composite material rotors 1 installed therein and a generator / motor 26 installed in the wheel container 24.
25 is a swing absorbing mechanism for supporting the wheel container 24, 27
Is a connecting shaft for connecting the two composite rotors 1, and 28 is a bearing for the generator / motor 26. The composite rotor 1 and the generator / motor are connected by an appropriate power transmission mechanism (not shown).

In such a flywheel battery, when there is surplus energy such as when the automobile 22 is traveling at a constant speed, the composite material rotor 1 is rotated at a high speed via a power transmission mechanism and stored as rotational energy. When energy is needed, the generator / motor 25 is rotated by the rotation of the composite rotor 1 to generate electricity.

[0033]

According to the composite rotor of the first aspect of the present invention, a layer of an adhesive material for relieving stress in the radial direction is formed in a middle layer of a ring formed by winding fibers immersed in a resin in multiple layers. The hub mounted on the inner periphery of the ring has a rotating shaft, and a cylindrical body mounted on the inner periphery of the ring and having one end connected to the rotating shaft, whereby the adhesive layer is formed in the radial direction. The stress is divided and relieved. In addition, since the other end of the cylindrical body is a free end, the cylindrical body expands and deforms outward during rotation, and by pressing the ring in the radial direction, the stress in the radial direction is reduced, and the ring is securely held from the inner peripheral side. To prevent idling. Accordingly, the ring is less likely to crack during high-speed rotation, and the size is reduced.

According to the composite rotor of the second aspect of the present invention, since the cylindrical body has a projection on its outer periphery that cuts into the inner periphery of the ring, this projection cuts into the inner peripheral surface of the ring, and To prevent relative movement in the axial direction of the hub.

According to the third aspect of the present invention, the thickness of the cylindrical body is thinner at one end connected to the rotating shaft than at the other end, so that the length of the one end is reduced. Even at the time of rotation, the cylindrical body easily expands and deforms outward. Also, if the length of the one end portion is short, the deformation of the cylindrical body is less likely to affect the coupling with the rotating shaft, and the axial dimension of the entire rotor is reduced.

According to the composite material rotor of the present invention, the connecting member for connecting one end of the cylindrical body and the rotating shaft has a conical shape concave inward in the axial direction. Even if shortened, the axial length of the part protruding from the connecting member side,
It is possible to secure a sufficient length for connecting to another device by a shaft end connecting member such as a chuck. If the total length of the rotating shaft is short, the size of the entire rotor is reduced and the rigidity is improved.

According to a fifth aspect of the present invention, the rotary shaft has a stepped portion where a connecting member connecting one end of the cylindrical body and the rotary shaft abuts from outside in the axial direction,
The connecting member is connected to the step by a screw, and a step is formed in the hole formed in the connecting member so that the head of the screw abuts, so that the thickness at the step of the connecting member, in other words, under the screw, Since the size is reduced, rigidity is improved in both bending and thrust.

According to the composite material rotor of the present invention, a notch is formed on a surface which is axially outside of a portion near an inner periphery of a connecting member connecting one end of the cylindrical body and the rotating shaft. As a result, the inner surface is deformed in the opposite direction during rotation, and an increase in the gap at the fitting portion due to centrifugal force is prevented.

According to the composite rotor of the present invention, since the mass adding member is mounted on the inner periphery of the cylindrical body, the mass adding member pushes the cylindrical body outward during rotation, and the cylindrical body is rotated. It expands and deforms further outward than the case alone, pushing the ring radially. Therefore, the stress in the radial direction is further reduced, and the ring is more reliably held from the inner peripheral side to prevent idling.

[Brief description of the drawings]

FIG. 1 is a sectional view conceptually showing a composite rotor according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a portion II in FIG.

FIG. 3 is a diagram showing an example of a manufacturing procedure of a composite rotor.

FIG. 4 is a sectional view showing a configuration example of a hub.

FIG. 5 is a perspective view showing an example of a mass adding member.

FIG. 6 is a sectional view showing another configuration example of the hub.

FIG. 7 is a diagram showing a flyhole battery mounted on an automobile.

FIG. 8 is a diagram showing a configuration example of a flyhole battery.

FIG. 9 is a plan view of a conventional composite rotor.

FIG. 10 is a sectional view of a conventional composite rotor.

FIG. 11 is a diagram showing cracks generated in a conventional composite rotor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Composite rotor 2 Ring 3 Hub 4 Adhesive layer 6 Rotating shaft 7 Cylindrical body 8 Connecting member 9 Projection part 10 Mass addition member 13 Fiber 14 Film-shaped adhesive material 16 One end side part 17 Step part of rotating shaft 18 Screw 19 hole 20 Stepped portion of connecting member 21 Notch

Claims (7)

[Claims] In a composite rotor having a ring formed by winding fibers immersed in a resin in multiple layers and a hub mounted on an inner periphery of the ring, a stress in a radial direction is reduced in a layer in the middle of the ring. That an adhesive layer is formed,
A composite rotor, wherein the hub has a rotating shaft and a cylindrical body mounted on the inner periphery of the ring and one end of which is connected to the rotating shaft. 2. The composite rotor according to claim 1, wherein the cylindrical body has a projection on an outer periphery thereof that cuts into an inner periphery of the ring. 3. The composite rotor according to claim 1, wherein the thickness of the cylindrical body is thinner at one end connected to the rotating shaft than at other portions. 4. The composite rotor according to claim 1, wherein a connecting member connecting one end of the cylindrical body and the rotating shaft has a conical shape concave inward in the axial direction. 5. The rotating shaft has a stepped portion in which a connecting member connecting one end of the cylindrical body and the rotating shaft abuts from outside in the axial direction, and the connecting member is connected to the stepped portion by a screw, 2. A step formed with a head of the screw in contact with a hole formed in the connecting member.
A composite rotor according to claim 1. 6. A notch portion is formed on a surface which is axially outwardly desired of a portion near an inner periphery of a connecting member connecting one end of the cylindrical body and the rotation shaft. A composite rotor as described. 7. The composite rotor according to claim 1, further comprising a mass adding member mounted on an inner periphery of the cylindrical body.