JPS5930934B2 - Rotating body - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotating body that can be used in power storage systems different from pumped storage power generation, lead storage batteries, etc. In a rotating body formed by loosely inserting an annular rotor and connecting the coaxial outer periphery and the inner periphery of the rotor with a connecting member, the inner periphery of the connecting member 10 is fitted to the outer periphery of the shaft. a rim member whose outer periphery is fitted or bonded to the inner periphery of the rotor; a radial member whose intermediate portion extends in the radial direction;
It comprises a flexible member 15 connected to the radial member in a radially deformable state, and an arm member connecting the boss member and the rim member.

Embodiments of the drawings will be described below. FIG. 1 is a plan view of a rotating body 1 showing the principle of the present invention, and FIG. 2 20 is a sectional view of the same side. (
An annular rotor 3 made of (for example, fiber reinforced plastic)
is loosely inserted, and the outer periphery of the shaft 2 and the inner periphery of the rotor 3 are connected by a connecting member 4.

The connecting member 4 includes an annular boss member 5 whose inner periphery is fitted to the outer periphery of the shaft 2, a rim member 6 whose outer periphery is fitted or bonded to the inner periphery of the rotor 3, and an intermediate member 5. is an arm member T that connects the boss member 5 and the rim member 6.
It is composed of. Thirty different embodiments of the connecting member 4 according to the present invention are shown in FIGS. 5 to 12.
FIG. 13 is a detailed view of part A in FIG. 5, and is an explanatory diagram of a rim member 6 with a cross section that can be slid in the circumferential direction, showing another embodiment that is applicable to all of FIGS. 5 to 12. Now, the amount of rotational energy stored in a rotating body is generally expressed by the following equation. PocKs×〜×W ・・・・・・・・・1ρHowever
P: Storage energy Ks: Shape factor (Ks2 is 1.0 when the strength is completely equal) σ: Allowable stress of the material ρ: Density of the material σ 1: γ specific strength ρ W: Weight, therefore for energy storage It can be seen that if a material with high specific strength is used for the rotating body, a large amount of energy can be stored with the same weight.

A material with high specific strength is fiber-reinforced plastic, and this fiber-reinforced plastic is used for the rotor 3 of the rotating body 1. - Method In order to increase the stored energy per unit weight in the above equation 1, it is preferable to increase the shape factor Ks.

Also, this Ks is K when the stress of the entire rotor 3 becomes uniform.
s=1.0. For metal rotors, a method is used to make the rotor uniform in strength based on the shape of the rotor, but in the case of a fiber-reinforced plastic rotor 3, reinforcing fibers must be cut to achieve the theoretical shape. Undesirable. Rather, it is preferable that the shape of the rotor 3 is cylindrical as shown in FIGS. 3 and 4, including the processing method. In general, the stress in the cylindrical rotor 3 is greatest in the center of a solid cylinder, as shown in FIG. 3A, and at this point the radial stress σ and the circumferential stress σt are equal. In a hollow cylinder, the stress σt in the circumferential direction becomes large as shown in FIG. 4A, instead of the stress σt in the radial direction becoming large on the inner circumferential surface. However, the strength and modulus of longitudinal elasticity of fibers and fiber-reinforced plastics vary depending on the direction of the reinforcing fibers, making it difficult to make them uniformly. Rather, the rotor 3 is intentionally anisotropic.
It is easier to make When the rotor 3 is made of anisotropic fiber-reinforced plastic, the stress is, for example, the ratio j of the longitudinal elastic modulus E in the radial direction, <l!: the longitudinal elastic modulus Et in the circumferential direction E, from 0.1 to 0. It has been found that when the value is set to .3, Etσt becomes considerably uniform.

Also, in the center of a solid cylinder, -L=1.0.
Therefore, the stress σt (=σγ) at the center cannot be reduced.

However, the ratio of the inner diameter (Rin) to the outer diameter (ROut) is Rin/
When ROut is larger than 0.2, σt can be made almost uniform as shown in FIG. However, in the hollow cylindrical rotor 3 made of fiber-reinforced plastic, the inner diameter (Rin)
The elongation of the material in the fiber-reinforced plastic rotor is large, and if the material is directly connected with a metal shaft, the elongation of the metal shaft in the radial direction is small, resulting in separation between the fiber-reinforced plastic rotor and the metal shaft. Next, each embodiment of the connecting member 4 will be explained with reference to FIGS. Or it is press-fitted.

In addition, in order to increase the adhesive area and ensure the transmission of rotational torque, a groove 8 is provided in the longitudinal direction of the shaft 2 on the surface of the shaft 2 as shown in FIG. The protrusion may be inserted. Further, the rim member 6 has a longitudinal elastic modulus Et in the circumferential direction.
is made of a material that is approximately equal to or smaller than the longitudinal elastic modulus Et of the material of the rotor 3, and is bonded to the rotor 3 or manufactured integrally with the rotor 3 in a manner that prevents stress in the circumferential direction from increasing during high-speed rotation. do. The rim member 6 and the boss member 5 are connected by the arm member 7, but since the radius (R1n) of the inner peripheral surface of the rotor 3 increases due to centrifugal force during high-speed rotation, the arm member 7 greatly extended. Therefore, the arm member 7 includes a flexible bridge-like member (Figs. 5 and 6) provided in contact with the boss member 5 so that a large displacement can be obtained in that direction when the arm member 7 is pulled in the radial direction. A tubular flexible member (seventh member) provided at the midpoint of the member
8), one or more ring-shaped flexible members connected by arms in a staggered manner (FIGS. 9 and 10), and one or more ring-shaped flexible members connected to the arms attached to the boss member 5. , and a bridge-shaped flexible member (Fig. 11) joined to the rim member 6, a flexible member (Fig. 12) obtained by dividing an annular member with arms attached to both ends into a plurality of circumferential parts, etc. have. Further, by dividing the rim member 6 in the circumferential direction as shown in FIG. 13, the stress in the circumferential direction of the rim member 6 can be reduced.

This method is particularly effective when it is necessary to use a material with a large modulus of longitudinal elasticity Et as the material for the rim member 6, since the stress will be large. It should be noted that the structure of the connecting member 4 shown in each of the above embodiments is not limited to that shown in the drawings, and it goes without saying that other structures may be used without departing from the gist of the present invention. . As explained in detail above, the present invention connects a boss member and a rim member, provides an arm member having flexibility in the radial direction of a rotating body, and connects a boss member and a rim member.
Since the rigidity in the radial direction is lowered between the arm member and the boss member, there is no stress or force interference between the rotor and the boss member or the shaft, making the rotor a rotating body close to the theory shown in the opening of Figure 4. It is something that can be done. Note that the present invention can be applied to energy storage flywheels, general flywheels, and the like.

[Brief explanation of the drawing]

Figure 1 is a plan view of a rotating body explaining the principle of the present invention, Figure 2
The figure is a sectional view of the same side, Figure 3 A is a diagram showing the stress in the radial direction and circumferential direction in a solid cylinder, and Figure 4 A is a diagram showing the stress in the radial direction and circumferential direction in a hollow cylinder. Diagrams shown, Figures 5 and 6
7, FIG. 8, FIG. 9, FIG. 10, FIG. 11, and FIG. 12 are plan views of connecting members showing embodiments of the present invention, respectively, and FIG. 13 is a section A in FIG. 5. FIG. 12 is a detailed diagram illustrating a rim member showing another embodiment that is applicable to all of FIGS. 5 to 12; Explanation of the main parts of the figure, 1...Rotating body, 2...
...Metal shaft, 3... Rotor, 4...
... Connection member, 5 ... Boss member, 6 ...
- Rim member, 7...Arm member.

Claims (1)

[Claims] 1 In a rotating body formed by loosely inserting an annular rotor made of reinforced plastic material into a metal shaft and connecting the outer periphery of the coaxial and the inner periphery of the rotor with a connecting member, the connecting member is connected to the inner periphery of the rotor. an annular boss member whose periphery is fitted to the outer periphery of the shaft; a rim member whose outer periphery is fitted or bonded to the inner periphery of the rotor; a radial member whose intermediate portion extends in the radial direction;
Consisting of a flexible member formed in a bridge shape, ring shape, etc. and connected to the same radial member in a radially deformable state,
A rotating body comprising an arm member connecting the boss member and the rim member.