JPH0814249A - High speed rotor and its manufacture - Google Patents

Abstract

PURPOSE:To provide a high speed rotor which is hardly deformed or in broken, and is small in dimensional change by temperature change, and a method for manufacturing it. CONSTITUTION:In a high speed rotor formed of a metal core body and a fiber- reinforced resin reinforcing ring, 50vol% of more of the inner layer of the reinforcing ring consists of a 90 deg.-oriented fiber, and its fiber content is set to 60vol% or more, so that the internal contraction stress at room temperature is larger than the centrifugal force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved high speed rotating body and a manufacturing method thereof.

[0002]

2. Description of the Related Art High-speed winding machines, processing machine spindles, rotors for generators and motors, flywheels, and other high-speed rotating bodies are being made faster and lighter and have higher performance. Accordingly, in the conventional metallic material and the rotating body having a simple structure, there are problems that the rotational moment is too large, the centrifugal force causes deformation, and the parts are detached. A metal rotating body, particularly a rotating body having a structure in which parts are attached, is deformed due to a large centrifugal force acting on the parts during high-speed rotation and the rotation balance is lost, so that there is a limit to speeding up.

[0003]

In order to suppress such deformation, a method of covering and adhering a reinforcing ring of a composite material using high-strength and high-elasticity fiber to a metal core is conceivable. There is. Although a method of integrally molding with the core body is also conceivable, when additional lamination molding is directly performed on the core body with added value, there are restrictions on processing conditions and there is a problem in production cost due to a decrease in yield. An object of the present invention is to provide a high-speed rotating body and a method for manufacturing the same, which solve the above-mentioned conventional problems.

[0004]

DISCLOSURE OF THE INVENTION The present invention is a high-speed rotating body comprising a metal core and a reinforcing ring made of fiber reinforced resin, in which 50 vol% or more of the inner layer of the reinforcing ring is made of 90 ° oriented fibers. A high-speed rotating body configured such that the internal contraction stress of the reinforcing ring at room temperature is greater than the centrifugal force, characterized in that its fiber content is 60 Vol% or more, and a metal core and a fiber-reinforced resin The reinforcement ring of is manufactured in a separate process,
The above problem is solved by a method for manufacturing a high-speed rotating body, characterized in that the reinforcing ring is integrated by being press-fitted into the core body, and the internal contraction stress of the reinforcing ring at room temperature is set to be larger than the centrifugal force. It is a thing.

The reinforcing fiber, which is the main material of the reinforcing ring, uses glass fiber or aramid fiber to prevent energy loss due to eddy current when reinforcing the rotating magnetic body. It is recommended to use carbon fiber having a high specific strength and specific elastic modulus. Also, these may be used in combination.

On the other hand, matrix resins for fixing the reinforcing fibers include BT resin, bismaleimide, epoxy,
Thermosetting resins such as vinyl ester, phenol and polyester are used.

As a forming method, a reinforcing ring can be obtained by winding a metal mandrel by a filament winding method, heat-curing it, and decoreing it.

Regarding integration with the core, the reinforcing ring can be expanded and inserted by a hydraulic method, or can be attached by a press-fitting method. At this time, by setting the internal contraction stress of the reinforcing ring at room temperature to be larger than the centrifugal force, a high-speed rotating body having stable rotation balance, which is the object of the present invention, can be obtained.

Regarding the fiber orientation of the reinforcing ring, it is possible to maintain the internal stress of the fiber for a long time by providing a 90 ° orientation layer in the innermost layer and setting the fiber volume content to 70% or more. Become. In order to maintain the internal stress at a high level, it is desirable that the 90 ° orientation layer is present in an amount of 50% or more.

The core of the high-speed rotating body of the present invention is steel,
The core body is made of a metal material such as aluminum having the basic characteristics as a rotating body material, and the core body may have any structure such as a solid body, a hollow tube body, a divided structure body, or a component mounting structure body. For generators and drive rotors,
It comes with a magnetic material attached.

When filament winding is performed using the reinforcing fiber and the matrix resin, it is necessary to improve the decentering property from the metal mandrel and ensure the dimensional accuracy of the diameter. In order to improve the decentering property, it is possible to use a metal having a large linear expansion coefficient, for example, an aluminum alloy, or a special mandrel that is an assembly type and reduces the cross-sectional area during decoreing.

In the high-speed rotating body of the present invention, the internal contraction stress of the reinforcing ring at room temperature can be appropriately changed according to the type of the rotating body, but the internal contraction stress is reinforced so as to be larger than the centrifugal force of the rotating body. It is necessary to give it to the ring.

[0013]

EXAMPLES The present invention will be described in more detail below with reference to examples. (Example 1)

A fiber orientation composition of 90 ° / 90 ° / 9 was obtained by using T glass fiber manufactured by Nitto Boseki Co., Ltd. having a tensile elastic modulus of about 8.6 Ton / mm ² and BT resin manufactured by Mitsubishi Gas Chemical Co., Inc.
A reinforcing ring having a 90 ° orientation rate of 80% and a fiber content rate of 60 Vol% at 0 ° / 85 ° / 90 ° was filament-wound using an aluminum mandrel, heat-cured, and decoreed to produce a molded product. The thickness of the reinforcing ring was about 0.6 mm. The inner diameter of the product was about 0.15% larger than the outer diameter of the aluminum mandrel at room temperature, and the decoreability was good.

The obtained reinforcing ring is cut into a predetermined length and press-fitted into a steel core of a high-speed rotating rotor by an air press-fitting method,
A rotor with a reinforcing ring having a compression tolerance of 1/1000 in the diameter direction was obtained. This rotor is a metal core rotor coated with a reinforcing ring that has an internal shrinkage stress of 10 kg / mm ² or more at room temperature, and has a high-performance rotor with excellent high-speed rotation performance with extremely small expansion deformation even at a rotation speed of 10,000 rpm. Met. There was no energy loss due to eddy currents in the magnetic field.

Example 2 Tensile Elastic Modulus 24 Ton / mm
While impregnating Mitsubishi Rayon's carbon fiber No. ² with Mitsubishi Rayon's heat-resistant epoxy resin, the fiber content rate is 60 Vol.
%, And the fiber orientation composition is (90/90 /
90 / +-80/90) × 5 Ply, a steel chrome-plated mandrel was used to wind the filament, and the core was heat-cured and decoreed to prepare a reinforcing ring having a thickness of 50 mm.

The aluminum alloy core of the high speed rotating rotor was cooled with liquid nitrogen and inserted into the reinforcing ring by the cold fitting method to obtain a rotating rotor having an outer diameter of 200 mm. The internal stress at the interface was about 20 kg / mm ² or more, and it could withstand rotation of 100,000 rpm.

[0018]

According to the present invention, since the metal core body and the reinforcing ring are integrated so that the internal contraction stress is made larger than the centrifugal force of the rotating body, the rotating body is prevented from being deformed or damaged, and the temperature change. A stable high-speed rotating body with little dimensional change due to.

Claims (2)

[Claims] 1. A high-speed rotating body comprising a metal core body and a reinforcing ring made of fiber reinforced resin, the inner layer of the reinforcing ring being 50Vo.
A high-speed rotating body configured such that the internal contraction stress of the reinforcing ring at room temperature is larger than the centrifugal force, characterized in that 1% or more is composed of 90 ° oriented fibers, and the fiber content is 60 Vol% or more. 2. A metal core and a reinforcing ring made of fiber reinforced resin are manufactured in separate steps, and the reinforcing ring is press-fitted into the core to integrate them, and the internal shrinkage stress of the reinforcing ring at room temperature is centrifugal. A method for manufacturing a high-speed rotating body, characterized by setting the force to be larger than the force.