JPS61101262A - Rotor for centrifugal separator - Google Patents

Abstract

PURPOSE:To obtain an inexpensive light wt. rotor having good capacity, by forming a cylindrical main body part from a laminate body made of carbon fiber reinforced plastic reinforced by a spiral fabric of which the fibers are oriented to a specific direction. CONSTITUTION:As a cylindrical main body part provided with a specimen hole, an anisotropic CFRP laminate body, wherein carbon fibers were oriented to the radius direction and the circumferential direction, is used. In this case, in order to continue the carbon fibers to a certain degree, the laminate body is formed of a fabric 1 comprising spiral carbon fibers. The laminate body can be brought to a predetermined thickness by adhering laminated blocks each of which has at least a wall thickness of 5mm or more. The shaft of a crown part made of a metal such as an aluminum alloy is inserted in the center hole of said CFRP laminate body and clamped by a nut to tightly clamp the main body part and the crown part.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotor for a centrifuge that performs separation, QjjQ, visualization, etc. of biological materials in the fields of medicine, pharmacy, biochemistry, and genetic engineering.

[Conventional technology]

Since the centrifuge rotor rotates at high speed, the rotor material should preferably be a material with high strength and low specific gravity, that is, a material with high specific strength. Titanium alloys have conventionally been used as this type of material, but these have had problems in that their rotational performance has reached their limit, and they are also expensive and heavy.

In addition, the new material is fiber reinforced plastic (hereinafter referred to as FR).
There is a laminate in which the plane perpendicular to the axis of rotation is made isotropic by shifting the reinforcing fiber gauze by a certain angle and described in Japanese Patent Application Laid-Open No. 57-101878. For further reinforcement, there is a structure in which a reinforcing ring is provided by filament-winding carbon fiber in the circumferential direction of the outer diameter of the laminate.However, in this structure, the laminate and the reinforcing ring are manufactured separately and then both are attached. The manufacturing and material costs are high, and there is little cost advantage compared to rotors made of titanium alloy.Furthermore, the laminate made of carbon fiber reinforced plastic (hereinafter referred to as CFRP) has improved strength. Therefore, the reinforcing ring can be omitted, but it is not preferable to intentionally make it isotropic, which is an anisotropic characteristic of FRP, because it does not take full advantage of the material's performance.

[Problem that the invention seeks to solve]

Therefore, the invention was made in view of the above-mentioned drawbacks, and the object of the present invention is to provide a CFRP rotor that has performance equivalent to or better than that of a titanium base metal rotor, and has a structure that fully demonstrates the performance of carbon fiber. It is something.

[Means for solving problems]

In the present invention, a cylindrical body portion provided with a sample hole is supplemented with a spiral fabric having fibers oriented in the radial direction and the circumferential direction.
CFRPI! The present invention relates to a rotor for centrifugal bales, characterized in that the rotor is constructed of a laminated body, and has a crown portion having a crown hole into which a driving shaft is inserted, and is fastened to the main body portion.

In a rotating body such as a rotor, the stress generated in the axial direction is small, and the stress in the radial and circumferential directions is large (・.

Therefore, an anisotropic CFRP laminate in which carbon fibers are arranged in the radial direction and the circumferential direction is used.
Since sufficient strength cannot be obtained if the fibers are continuous, it is preferable that the fibers be continuous to some extent. In order to satisfy this condition, a laminate was fabricated using a spiral carbon fiber support as shown in Section 2 (2). It may be integrally molded (but it is also possible to use two or more of the laminate blocks and bond them together to obtain a predetermined thickness. It is necessary that the subsequent block has a wall thickness of at least 5+ nm or more.

In addition, the amount of sample i acts as a load on the sample hole due to centrifugal force, which causes the hole to deform and generates high stress.
Since the ring fibers in the outer diameter direction from the sample hole are arranged continuously in the circumferential direction, it has the same effect as the reinforcement ring described above.
It plays a role in preventing large deformation and suppressing the stress generated.

A CFRP laminate using a spiral structure is hollow due to its structure. Therefore, the crown part is preferably made of metal such as an aluminum base metal, and a shaft is provided at the center of the top surface.
'kcInsert into the center hole of the FRP laminate and tighten with the
It is preferable to fasten the main body part of the FRP laminate and the crown part made of aluminum alloy. A crown hole is provided on the lower surface side of the round part, and the drive shaft of the high frequency motor is inserted into this hole to rotate the rotor.

〔Example〕

2 shows a cross-sectional view of the embodiment of the rotor shown in FIG. 1; FIG.

The main body part 2 is made of a spiral woven fabric (and has one CFRP layer).A shaft 4 protruding from the center of the upper surface side of the crown part 5 made of an aluminum base metal is inserted into the center hole of the resting part 2 and fixed. It is fastened to the main body part 2 with a nut 5. A sample to be separated is placed in the sample hole 7.

A free enclosed adapter 6 is inserted. The outer diameter of this rotor is φ200, and the height of the unbody part 2 is 8Qmm. There are 8 separate samples, 5 m in each sample hole, so it is possible to separate 4 Q ml in total. The performance of this rotor is a maximum rotation of #i75.000 rpm and a maximum centrifugal acceleration of approximately 5'i G'''C6.

〔Effect of the invention〕

The present invention makes it possible to obtain a rotor that has performance equal to or higher than that of a titanium alloy rotor, is lightweight at a lower price, and has lower manufacturing and material costs than other CFRPM rotors, and is made of carbon fiber. We can provide a rotary bamboo structure that fully demonstrates the performance of

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a cFRpa rotor according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram of a twisting spiral fabric used in the present invention. Explanation of symbols 1 Spiral carbon fiber fabric 2 Main body portion 3 Crown portion 4 Shaft 5 Fixing nut
6 Adapter Procedure Amendment (Salmon) February 27, 1985

Claims (1)

[Claims] 1. The cylindrical main body portion provided with a sample hole is composed of a laminate made of carbon fiber reinforced plastic reinforced with spiral fibers with fibers oriented in the radial and circumferential directions. A rotor for a centrifuge, characterized in that a crown portion having a crown hole into which a drive shaft is inserted is fastened to the main body portion. 2. For a centrifugal separator according to claim 1, wherein the crown portion is fastened to the main body portion by a shaft and a nut that are integrated with the crown portion and passed through a center hole of the main body portion. Rotor. 3. A rotor for a centrifuge according to claim 1 or 2, wherein the crown portion is made of an aluminum alloy.