JPS6022954A - Rotor of centrifuge - Google Patents

Abstract

PURPOSE:To enable revolution at superhigh speed of a centrifuge by arranging a base material of a rotor comprising a composite material consisting of resin or metal reinforced with fiber arranged laminary and in the direction of rotational axis, and constructing the rotor pseudoisotropic in a plane intersecting perpendicularly the rotational axis. CONSTITUTION:Insertion holes 4 for centrifugal separation tubes are bored in a solid rotor 2 equally distributed around the axial center X and with a same distance from the axial center X, wherein the rotor 2 is formed of a composite material consisting of resin or metal reinforced with fiber. The reinforcing fiber material comprises a fabric material consisting of unidirectional base material and/or reinforcing fiber prepd. by aligning the reinforcing fiber parallelly in one direction to form sheet. Above-described base material is arranged laminary in the direction of the central axis X and the rotor 2 is constructed pseudoisotropically in a plane intersecting perpendicularly the central axis X. As a result, not only a revolution at superhigh speed is possible with small energy consumption but also the time required for acceleration and deceleration are short, and a rotor for centrifuge of high analytical efficiency is provided.

Description

Detailed Description of the Invention The present invention relates to a rotor for a centrifuge, and more specifically, the present invention relates to a rotor for a centrifuge. This relates to the rotor of a centrifuge used to measure the interaction between particles, sedimentation coefficient, etc.

The rotor of the centrifuge described above has a rotor and a drive shaft connected to the rotor, but since centrifugal force is used, if the rotation speed of the rotor is high (), The higher the value, the higher the ability, and the better the quality. If we follow the example, the separation capacity is proportional to the fourth power of the circumferential speed of the rotor, so if the circumferential speed is 1.
If the increase is 1 times, the separation capacity will be approximately 1. / 16 times more. To address this issue, numerous measures have been attempted to increase the rotational speed of the rotor.

Conventionally, centrifugal rotors are known that have a rotor made of titanium alloy.However, rotors made of butane alloy, including the C1 drive shaft, which is extremely heavy, are known. If the dynamic balance of the rotor is not carefully balanced, the large fish will rotate at extremely high speeds, take a long time to accelerate and decelerate, and the efficiency of separation and measurement (hereinafter referred to as analysis) will be low. Also, since the weight is large, the J energy required for rotation is also large.

As an alternative to this, a rotor equipped with a rotor made of fiber-reinforced resin has been studied in recent years. This rotor has a cylindrical rotor, and is equipped with a cell bottle bonded or integrally formed on the inner peripheral surface of the rotor. Since fiber-reinforced resin has a high specific strength, this rotor appears to be able to rotate at extremely high speeds. However, since the rotor of such a conventional rotor has a cylindrical shape,
The disadvantage is that when the rotational speed is increased, the rotor bends into an oval shape, causing loss of dynamic balance. Another drawback is that the mounting part of the cell bottle is fragile. Therefore,
The rotation speed does not improve as much as expected.

The purpose of this invention is to solve the above-mentioned drawbacks of the conventional rotor, and not only can it rotate at ultra-high speed with less energy, but also
To provide a rotor for a centrifuge which requires a short time for acceleration and deceleration and has high analysis efficiency.

In order to achieve the above object, the present invention includes a solid rotor, a hole formed in the rotor, located at an equal distance from the rotation axis of the rotor, and a hole located at an angle between the rotor and the rotation axis. The rotor is made of a composite material made by reinforcing resin or metal with a reinforcing fiber material, and the reinforcing fiber material has reinforcing fibers mutually arranged in one direction. Unidirectional base material and/or
Further, the rotor is made of a textile base material with GEL reinforcement 11M, the base material is arranged in layers in the direction of the rotation axis, and the rotor is pseudo-isotropic in a plane orthogonal to the rotation axis. The centrifuge rotor is 1 liter, which is characterized by this! Served.

To explain one embodiment of the rotor of this invention, FIG.
In FIG. 2 (schematic plan view) and FIG. 2 (schematic front view with partial cross section), the computer 1 includes a solid rotor 2; It has cell insertion holes 4 that are equidistant from the rotation axis X and equally distributed around the axis X. The rotor 2 is made of a composite material made by reinforcing resin or metal with a reinforcing fiber material, and the drive shaft 3 is made of metal.

The rotor 1 is usually rotated in a protective cylinder made of iron or the like.

The above-mentioned reinforcing fiber material is made of reinforcing fibers (multifilaments) made of high-strength, high-elastic fibers such as carbon fiber, glass tan, and high-elastic fiber II (for example, polyaramid fiber LFF1), which are arranged parallel to each other in one direction and formed into a sheet. It consists of a unidirectional base material arranged in a shape and a woven base material of the above-mentioned reinforcing fibers. Among these, carbon fibers are most preferred because they have relatively high strength, high elasticity, and low specific gravity, making it possible to further increase the specific strength of the rotor.

Furthermore, when using a woven fabric base material, it is preferable to use a plain woven fabric, which has relatively little bending of the warp and weft yarns at the intersecting parts and has a stable structure. However, other tissue fabrics,
For example, it may be satin fabric or twill fabric, or
As described in Japanese Patent Application No. 7-52221, two groups of yarns made of straight reinforcing fibers with substantially no bending are drawn parallel to each other in one direction in a sheet shape, and the sheet surface is Even so-called non-crimp fabrics, in which the reinforcing fibers of both yarn groups are held together by auxiliary yarns so as to face each other and to be substantially perpendicular to each other, are also considered to be bad. It may also be a so-called unidirectional fabric. Furthermore, it is also possible to use a unidirectional base material and a textile base material.
It contains 75% by volume, preferably 50-65% by volume.

In addition, the so-called 71~RiX resin for composite materials is usually epoxy resin, unsaturated poly 1 ester resin,
)・Thermosetting resin such as 1-nol resin is used. Among them, epoxy resin is particularly desirable. When using boxy resins, bisphenol A-based epoxy resins are commonly used. This bisphenol A-based Evo 4 resin contains 40 to 60 f.
fi if! % of phenolic novolak] boxy resin, 5 to 20% by weight of meta-aminophenolic epoxy resin, the so-called mixed Jl force 1
It is preferable to use 21 resin because it not only increases the strength of the 71-RIX and improves the durability of the rotor, but also improves the vibration range 3111 and enables rotation at higher speeds. Furthermore, if an epoxy resin containing 5 to 10% by weight of carbon black with an average particle size of 5 to 45μ, zirconium silicate with an average particle size of 1 to 30μ, silicon carbide with an average particle size of 30 to 40μ is used, molding is possible. This is preferable because it improves the dimensional stability during processing. Addition of zirconium silicate is also preferred in order to improve the chemical resistance of the matrix. Chemical resistance is improved not only by zirconium silicate, but also by using zirconium silicate, which has an average particle size of 0.5 to 7.5.
Also obtained by μ aluminum silicate. The use of carbon black is also preferred to prevent matrix deterioration when the rotor is used under the influence of ultraviolet light. The UV resistance can be further improved by using an epoxy resin to which benzotriazole-based 2-hydroxy-5-medylphenyl or benzophenone-based 2-hydroxy-4-methoxybenzophenone is added.

When a metal is used as the so-called matrix, it is preferable to use aluminum, titanium, magnesium, etc., or an alloy containing at least one of these as a main component.

Now, in the rotor, the above-mentioned unidirectional base material or textile base material is aligned in the direction of the rotation axis of the rotor and arranged in layers. Moreover, when the above base materials are stacked, the direction of the navy blue axis in the case of the unidirectional 11 base material, and the direction of the warp or weft in the case of the textile base material, are the same as those of the adjacent base materials. When looking at them, they are arranged so that they have 15 to 606 angles. As is well known, Reinforcement I!
Composite materials made by reinforcing resin or metal with fibers are reinforced fiber eaves1.
iIN, exhibits high strength in the axial direction, but the strength is I! Ji is an extremely anisotropic material that rapidly decreases as it moves away from the direction of the dark blue axis (at an angle to the texture direction). If the anisotropy is large,
The strength of the solder rotor as a whole does not increase. Therefore, in this invention, the above-mentioned J: Una, so-called cross-lamination is performed. By performing such cross-lamination, the rotor has pseudo-isotropy in a plane J5 perpendicular to its rotation axis.

The rotor of the present invention as described above can be molded using conventionally known composite material manufacturing techniques. For example, a rotor whose matrix is made of resin is molded as follows.

First, a so-called prepreg, which is made by impregnating a unidirectional base material or a textile base material with B-Stage resin, is prepared.

Next, the above prepreg is cut into a circular shape with the diameter J of the rotor: slightly larger than the diameter of the rotor.

Next, in the case of a unidirectional substrate, the ten-mentioned fragment is
l The direction of the If axis, or in the case of a textile base material, the direction of its warp or weft, in increments of 15 to 60 degrees, for example, 1
The desired number of sheets are stacked one on top of the other by shifting them by 5°, 300° or 45°.

Next, the above-mentioned stacked body is heated and pressurized using, for example, a mold to harden the resin. In other words, mold and obtain the rotor.

Next, a cell insertion hole and a shaft hole are bored in the rotor, and a drive shaft is fitted into the shaft hole. .

In 3 above, instead of using the base material in the form of a prepreg, it is also possible to mold the base material as it is, that is, by combining the raw base materials with Φ and using the well-known resin injector method.

If the matrix is a metal, the base material plated with the metal that becomes the 71-lix is combined in the same way as above, or during the small matching, powder of the 71-lix metal is added as an OF. After obtaining a stacked body, pressurize and heat the mold to form a C. It is also possible to use a so-called high-pressure casting method, in which raw base materials are stacked, the stacked body IIC is placed in a mold, and a molten metal serving as a matrix is poured into the mold under pressure.

In the lj method described above, if the superimposed base materials are sewn together with reinforcing fiber threads, delamination can be prevented and rotation at a high speed C is possible.Also, ; When using a textile base material such as a directional base material, they can be alternately used one by one, or they can be stacked alternately as a set.

At this point, the fabric is placed on the outer layer.Since the fabric has good restraint between the fibers, it is possible to prevent cracking when processing cell insertion holes and shaft holes. preferable.

As explained above, the rotor for centrifuges of this invention is
It is equipped with a rotor made of a composite material that is solid and has a high specific strength and is made by reinforcing resin or metal with a unidirectional base material of reinforcing fibers and/or woven fabric, and the base material is aligned with the axis of the rotor. Because they are arranged in layers in the direction and quasi-isotropic in the plane orthogonal to the axis, they are lightweight, have high specific strength, and have a large rotational speed. Not only is this possible, but the time required for acceleration and deceleration is shortened, significantly improving analytical efficiency. Further, less energy is required for rotation. Moreover, if a cell bottle is attached to the inner circumferential surface of the cylinder (like the conventional rotor using a rotor with KJ < 13), the rotor may bend into an oval shape during rotation and the dynamic balance may be lost, or the hill bottle may not be installed. There is no need to worry about parts breaking.

Further, the rotor of the present invention has the following advantages: - As described above, since the rotor is lightweight, even if it breaks and scatters during rotation, the energy of the scattering is small. Therefore, the iron protective cylinder can be thin, and the rotor itself is lightweight, which greatly reduces the weight of the Aimatsu-C centrifuge, and also reduces the impact.

[Brief explanation of the drawing]

Figures 1 and 2 are a schematic diagram of one shelf IM 1M of a centrifuge according to this discrimination, and Figure 1 is a plan view;
FIG. 2 is a side view with a partial cross section taken into consideration. 1: [1-ta 2: Rotor S3: Drive shaft 4: Rel 1 Dwarf hole 14th edition Applicant Azuma Kaisha Kanaishi ＼ To

Claims (1)

[Claims] The rotor has a solid rotor, and rail insertion holes bored in the rotor, equidistant from the rotation axis of the rotor, and equidistributed around the rotation axis; The rotor is made of a composite material r1 made by reinforcing resin or metal with a reinforcing fiber material, and the reinforcing fiber material is a unidirectional material M0 made by aligning reinforcements II Iff parallel to each other in one direction in a sheet shape.
and/or reinforcement! The rotor is made of a woven fabric base material of various types, the base material is arranged in layers in the direction of the rotation axis, and the rotor is pseudo-isotropic in a plane perpendicular to the rotation axis. centrifuge rotor.