KR101162103B1 - A hybrid fixed angle rotor for a centrifuge with light weight - Google Patents

Abstract

The lightweight hybrid fixed-angle rotor for a centrifuge according to an embodiment of the present invention has an outer portion formed of a composite material reinforced with fibers at least in the circumferential direction on the outer side, and stiffness of not less than 1/5 with respect to the circumferential stiffness of the outer side from the inner side of the outer portion. It has an inner portion having a plurality of slots, and having a higher rigidity than the inner portion, having a larger outer diameter than the inner diameter of the inner portion, and comprises a hub coupled to the pressure applied to the inner portion in the inner portion It is done. According to the present invention configured as described above, there is an advantage in that the deformation amount is reduced to enable high speed rotation and the safety is improved.

Description

Lightweight hybrid fixed angle rotor for centrifuges {A hybrid fixed angle rotor for a centrifuge with light weight}

The present invention relates to a fixed-angle rotor of the centrifuge rotor, and more specifically, the outer side formed of a composite material reinforced with fibers at least in the circumferential direction on the outside, and the outer side inside so as to have a rigidity of 1/5 or less of the outer side rigidity It is located, the inner portion is provided with a plurality of slots, has a rigidity than the inner portion, has a larger outer diameter than the inner diameter of the inner portion, and consists of a hub coupled to the pressure applied to the inner portion from the inner portion, the inner portion and By controlling the material stiffness ratio of the outer part, the stress distribution in the θ and r directions generated in the rotor reflects the anisotropy of the material strength, and the compressive stress is generated when assembling the hub and the inner part so that the driving force between the hub and the inner part can be generated. Lightweight hybrid for centrifuges that can be optimally designed for high speed rotation by solving the separation problem It relates to a fixed angle rotor.

Centrifuge is a device that separates the sample by component by using the centrifugal force generated at this time by rotating the sample at high speed and is widely used in experiments in various fields such as life, physics, medicine and chemistry.

The centrifuge has a rotor that rotates at high speed by receiving rotational power from a motor, and the rotor includes a vertical type, a hanging type, and a fixed angle type.

The target rotor of the present invention is a fixed angle rotor, and the rotor is recessed in a form in which a plurality of slots are inclined radially with respect to the center of rotation.

The slot is where the tube containing the sample is accommodated, and may have various sizes and positions as necessary.

In addition, since the slot is rotated at a high speed, a large centrifugal force is generated to separate the sample according to the density. This high speed rotation generates stress distribution by centrifugal force not only in the sample but also in the rotor.

The centrifugal force received by the unit volume is proportional to the square, distance, and density of the rotational speed. Therefore, if the rotor is made of materials with low density and good strength, that is, high strength, higher rotational speed can be achieved. For this reason, attempts have been made to realize higher rotational speeds by applying composite materials having good specific strength to high-speed centrifuge rotors.

Existing composite high-speed centrifuge rotor patent is composed of inner part (metal)-outer rotor (composite material), inner part (polymer)-outer rotor (composite material), or inner part (composite) Materials)-Three types of outer rotors (composites).

Looking at the configuration and problems of the three rotors in order,

US Patent No. 5,057,071 discloses a rotor including an inner part formed of aluminum and an outer part formed of a composite material.

 The patent has a disadvantage that the composite rotor uses a metal material with a high density, so that the stress inside the rotor due to the centrifugal force is greatly generated, and the anisotropic property of the reinforcing fiber composite material arranged in the direction is not properly utilized. .

Next, US Patent No. 4,824, 429 discloses a rotor including an inner part formed of a polymer and an outer part formed of a composite material.

Since the patent uses a low density polymer material on the inner side, it is possible to reduce the stress inside the rotor due to the centrifugal force, but it is not aware of the problem of excessive inner diameter expansion caused by the low rigidity of the polymer material during the high speed rotation. .

Such expansion of the inner diameter causes a problem of separation between the rotational shaft and the inner portion, thereby making the driving unstable. In addition, the patent has an angular structure in which the concentration of the inner portion is so concentrated that the stress concentration is large.

Finally, U. S. Patent Nos. 5,643, 168, 5,759, 592, 5,776, 400, and 5,362, 301 disclose rotors in which the inner and outer portions are composed of composite materials.

The patents apply a composite material to both the inner and outer parts, and as described clearly in each specification, the inner part is configured to reinforce the fiber in the radial r direction, and the outer part to reinforce in the circumferential direction.

That is, the inner part has various methods such as quasi-isotropic arrangement, random arrangement, and weaving arrangement, but basically these various arrangements in the r, θ plane are axially, that is, the vertical direction (z-direction) of the cylindrical coordinate system. The inner part is formed by laminating in the outer part, and the outer part surrounds the internal structure by arranging fibers in the θ direction.

The technical idea of this structure is to prevent the expansion of the rotor generated during high-speed rotation through the fiber reinforcement in the radial direction, the inner portion through the fiber reinforcement in the circumferential direction.

However, since the technical concept does not properly reflect the anisotropy characteristic of the composite material, there is a problem that is far from the optimum design of the composite centrifuge rotor.

Anisotropic characteristics of the composite material will be described with reference to FIG. 1. As shown in FIG. 1, the composite material has a very high strength in the fiber direction in one direction but is very fragile in a direction perpendicular to the fiber in the two direction. The difference is: 1.

This tendency is because the strength of the fiber direction is mainly due to the fiber strength, and the strength of the fiber vertical direction has much influence on the resin strength. The strength of commercialized T1000 grade carbon fiber is measured up to 7 kPa.

When the anisotropic characteristic is weakened, such as quasi-isotropic or random arrangement, the strength also decreases, and generally has 1/6 or less of the unidirectional arrangement strength.

The stress distribution generated in the high speed rotating body composed of the inner part and the outer part is summarized with reference to FIG. 2 as follows. Fig. 2 shows the rotor in the r and θ directions of a rotor consisting of an inner part of an isotropic (or quasi-isotropic) material having a diameter of 20 to 100 mm and an outer part of a fiber reinforced composite material having a diameter of 100 to 110 mm. The stress distribution is shown.

As the stiffness of isotropic material decreases from 55 GPa to 24 GPa and 16 GPa compared to 130 GPa in the circumferential stiffness of the composite, the θ stress in the direction of the composite material increases and the stress in the r direction decreases. It can be seen that both the r and θ stresses decrease.

Therefore, in order to optimize the rotor using the anisotropy of the composite material, that is, the maximum strength in the fiber direction, a large amount of stress is generated in the outer part of the composite material reinforced with fibers in the θ direction, and the inner part of which the strength is relatively low is r. The stress in the direction and in the θ direction and in the r direction of the outer portion should be lowered.

This method can be implemented by increasing the stiffness difference of the inner side and the outer side in reverse as shown in FIG. 2, rather than the r-direction fiber reinforcement of the inner side composite material, which is a technical idea of the existing patents.

However, the method has a problem that excessive expansion of the inner diameter of the inner portion is accompanied at high speed due to the degradation of the inner portion. Fig. 3 shows the inner diameter displacement when the rotor rotates at 30,000 rpm at the inner diameter position of 20 mm. When the stiffness of the inner portion is lowered from 55 GPa to 16 GPa, the inner diameter displacement increases from about 0.05 mm to 0.12 mm, which may cause a separation problem between the rotating shaft and the inner portion.

An object of the present invention is to solve the conventional problems, more specifically, to control the stiffness ratio between the inner portion formed with a plurality of slots and the outer portion surrounding the inner portion to fully utilize the maximum strength of the outer portion made of a composite material, It is to provide a lightweight hybrid fixed-angle rotor for centrifuge, which is optimally designed for high-speed rotation by solving the separation problem between the hub and the inner part which may occur during high-speed rotation by generating and combining the compression force during high rigid hub assembly.

Lightweight hybrid fixed-angle rotor for a centrifuge according to a first embodiment of the present invention for achieving the above object is located on the outer side formed of a composite material reinforced with fibers at least in the circumferential direction, and the inner side of the outer portion, The outer part rigidity has a rigidity of 1/5 or less, has an inner part provided with a plurality of slots, a rigidity higher than the inner part, has an outer diameter larger than the inner diameter of the inner part, and a pressure is applied to the inner part inside the inner part. It characterized in that it comprises a hub coupled to.

A lightweight hybrid fixed-angle rotor for a centrifuge according to a second embodiment of the present invention is located at an outer side formed of a composite material reinforced with fibers at least in the circumferential direction on the outer side, and is positioned at the inner side of the outer side, and has a stiffness of 1/5 or less at the outer side. A hub having a rigidity of and having a plurality of slots, a hub having a higher rigidity than the inner part, having a larger outer diameter than the inner diameter of the inner part, and having a pressure applied to the inner part of the inner part, and the inner part. It is formed of a material having a higher rigidity, characterized in that configured to include a core provided in the slot.

The lightweight hybrid fixed-angle rotor for centrifugal separators according to the third embodiment of the present invention is located at an outer side formed of a composite material reinforced with fibers at least in the circumferential direction and positioned at an inner side of the outer side, and has a stiffness of 1/5 or less at the outer side. A hub having a rigidity of and having a plurality of slots, a hub having a higher rigidity than the inner part, having a larger outer diameter than the inner diameter of the inner part, and having a pressure applied to the inner part of the inner part, and the inner part. It is formed of a material having a higher rigidity is characterized in that it comprises a core portion provided in the slot and the coupling member for coupling to one side of the hub to force the hub to apply pressure to the inner side.

The hub is characterized in that formed on the basis of a hollow cylindrical shape.

The hub is characterized in that formed on the basis of a hollow truncated cone.

The outer side is characterized in that bonded to the inner side.

The outer portion has an inner diameter smaller than the outer diameter of the inner portion and is forcibly fitted.

The outer portion is formed by winding a filament or fiber a plurality of times on the outer surface of the inner portion and then injecting and curing a polymer resin.

The outer portion is formed by winding a plurality of times the filament (filament) or fiber impregnated with a polymer resin on the outer surface of the inner portion and then cured.

The outer portion is formed by winding the composite material of the B-stage state on the outer surface of the inner portion and then curing.

The outer side may be coupled to the inner side by an adhesive member.

The core is characterized in that it is molded into a composite by resin transfer molding (RTM).

The core portion is characterized in that it is coupled by any one method of interference fit coupling, screw coupling, coupling using an adhesive member inside the slot.

The inner part is characterized in that it is formed by injection molding or machining.

As described above, in the present invention, by controlling the stiffness ratio between the inner portion formed with a plurality of slots and the outer portion surrounding the inner portion, a large amount of stress can be generated in the θ direction of the outer portion of the composite material at which the maximum strength is realized, and the r direction of the outer portion is provided. And it was configured to lower the stress in the r direction and θ direction of the inner portion.

In addition, in order to solve the problem of separation with the rotating shaft that may occur due to the weakened rigidity of the inner portion is configured to generate a compressive force on the inner diameter of the high rigid hub.

Since the optimum design is possible in consideration of the anisotropic strength characteristics of the composite material through the above components, it is possible to implement a lightweight fixed-angle rotor for a centrifuge that is advantageous for high speed rotation.

1 is a table comparing and measuring the circumferential and radial stiffness of the composite material used in the prior art.
Figure 2 is a graph showing the stress distribution in the θ direction and r direction generated when the rotor reinforced with a composite material is rotated at 30,000rpm outside the inner side provided to have isotropic (or quasi-isotropic).
Figure 3 is a graph showing the displacement of the inner diameter when the inner portion rotates at 30,000 rpm 20 mm away from the sample center of Figure 2;
Figure 4 is a cross-sectional view showing the configuration of a first embodiment of a lightweight hybrid fixed-angle rotor for a centrifuge according to the present invention.
Figure 5 is a data analysis of the stress concentration phenomenon occurring around the slot when designing a hybrid hybrid fixed-angle rotor for centrifuge according to the present invention.
6 is a data analysis of the phenomenon that the circular slot is deformed into an elliptical shape at high speed.
Figure 7 is a cross-sectional view showing the configuration of a second embodiment of a lightweight hybrid fixed-angle rotor for a centrifuge according to the present invention.
Figure 8 is a cross-sectional view showing the configuration of a third embodiment of a lightweight hybrid fixed-angle rotor for a centrifuge according to the present invention.
Figure 9 is a cross-sectional view showing the configuration of a fourth embodiment of a lightweight hybrid fixed-angle rotor for a centrifuge according to the present invention.
10 is a cross-sectional view showing the configuration of a fifth embodiment of a lightweight hybrid fixed-angle rotor for a centrifuge according to the present invention;

Hereinafter, with reference to the accompanying Figure 4 will be described the configuration of the centrifuge rotor (hereinafter referred to as "rotor 100") according to the present invention.

Figure 4 is a cross-sectional view showing the configuration of a first embodiment of a centrifuge rotor according to the present invention.

As shown in the drawing, the rotor 100 according to the present invention has an outer portion 160 formed of a composite material reinforced with fibers at least in the circumferential direction on the outer side, and the outer portion 160 having rigidity of 1/5 or less of the outer portion 160 stiffness. 160 is located in the inner side, including the inner portion 140, the plurality of slots 142 is provided radially and the hub 120 coupled in a state of applying pressure to the inner portion 140 from the inner side 140 It is composed.

The hub 120 serves as a center of rotation for allowing the rotor 100 to rotate by receiving rotational power from a motor (not shown), and formed of a material having a higher rigidity than the inner portion 140. It is formed based on a cylindrical shape with an empty center.

That is, the hub 120 may have a hollow cylindrical shape as shown in FIG. 4, but may be additionally provided with flanges, ribs, and the like, based on the hollow cylindrical shape, although not shown.

And, in order to prevent the separation between the inner portion 140 and the hub 120 during high-speed rotation, the hub 120 and the inner portion 140 is clamped by the inner diameter expansion predicted amount of the inner portion 140 at the target rotational speed. Is assembled.

For example, the interference fit of the hub 120 and the inner portion 140 can be implemented using a temperature difference.

That is, the outer diameter of the hub 120 is configured to be larger than the inner diameter of the inner portion 140, The hub 120 is cooled and contracted. At this time, the inner part 140 is heated and thermally expanded, so that the outer diameter of the hub 120 may be fitted in a state in which the outer diameter of the hub 120 is smaller than the inner diameter of the inner part 140.

After the fitting coupled to the hub 120 and the inner portion 140 is to maintain a state in which pressure is generated in the temperature equilibrium state.

That is, the hub 120 is expanded after being fitted with the inner portion 140, the inner portion 140 is contracted, and the hub 120 is coupled in a state where a pressure is applied to the inner portion 140.

The inner side 140 is provided outside the hub 120. The inner portion 140 has a plurality of slots 142 recessed radially in the sample is formed, the slot 142 is inclined downward toward the outside so that the sample contained therein is not separated to the outside by the centrifugal force during high-speed rotation It is formed to have.

In addition, the inner portion 140 is preferably formed of a material having a low rigidity of 1/5 or less with respect to the rigidity of the outer portion 160, for example, a polymer, and the reason for this will be described below.

The outer side 160 is provided outside the inner side 140. The outer portion 160 has a much higher strength than metal and has a low density fiber-reinforced composite material, and the arrangement direction of the fibers is circumferential in the circumferential direction, and ± 45 in the z-direction in the circumferential direction. Fiber arrangements with angular changes within degrees are also possible.

As mentioned in Figure 1, the composite material is much stronger than the metal in the fiber direction, but has a weak characteristic in the direction perpendicular to the fiber. The centrifugal rotor applied with the existing composite material has a stress ratio between the circumferential direction and the radial direction generated within the rotation when it is within 10. Therefore, the damage occurs first in the radial direction, that is, the vertical direction of the fiber. have.

Accordingly, the elements that influence the stress ratio in the circumferential and radial directions from the elastic analysis and the finite element analysis for the high speed rotation of the hybrid anisotropic material having the inner part 140 and the outer part 160 are the inner part 140 and the outer part 160. The elastic modulus ratio, i.e., the stiffness ratio, may be used when the stiffness of the inner portion 140 is less than 1/5 of the stiffness of the outer portion 160 composite material in the centrifuge rotor of a general size.

Accordingly, the outer portion 160 is formed by winding a filament or fiber on the outer surface of the inner portion 140 a plurality of times and injecting a polymer resin or the like, or molding the filament or fiber impregnated with the polymer resin on the outer surface of the inner portion 140. It can also be formed by winding up many times, and hardening | curing.

In addition, the outer portion 160 may be molded into a composite material by RTM (resin transfer molding), or may be formed by winding a composite material in a B-stage state on the outer surface of the inner portion 140, and the inner portion 140 and It may be configured to attach by placing the adhesive member between the outer portion (160).

When the stiffness of the inner portion 140 is weaker, the expansion of the inner portion 140 becomes easier than the expansion of the outer portion 160 during rotation, so that the inner portion 140 presses the outer portion 160, and the inner portion 140 in this process. The compressive stress is generated at the interface between the and the outer portion 160. This compressive stress not only prevents delamination of the interface but also suppresses crack propagation.

Therefore, in order to design the rotor 100 using the maximum strength of the outer portion 160, the outer portion 160 is to reinforce the fiber in the θ direction in the circumferential direction so that even if a large stress occurs, the inner portion 140 is applied to the outer portion 160 of the θ rigidity less than 1/5, so that the stress in the r direction and the θ direction of the inner portion 140 having a relatively low strength and the r direction of the outer portion 160 can be lowered. do.

As a result, the inner portion 140 is preferably formed of a material having a lower rigidity than the outer portion 160. For example, the outer portion 160 may be a composite material, and the inner portion 140 may be a polymer. .

The inner part 140 may be changed to various materials according to the rigidity of the outer part 160 in addition to the polymer. That is, when the URN300 grade or more composite material having a rigidity of 370 kPa in the fiber direction is applied to the outer portion 160 as shown in FIG. 1, the inner portion 140 is made of aluminum having a rigidity of 70 kPa or less of 1/5 or less thereof. Alloys, magnesium alloys and the like are applicable.

Accordingly, the inner part 140 may be manufactured by machining, or may use injection molding.

Hereinafter, the stress concentration phenomenon and deformation type of the slot generated when the rotor 100 is rotated at high speed will be analyzed with reference to FIGS. 5 to 6.

FIG. 5 is data analyzing stress concentration occurring around a slot when designing a lightweight hybrid fixed-angle rotor for a centrifuge according to the present invention, and FIG. 6 is data analyzing a deformation type of a circular slot at a high speed rotation. Marked within a 60 ° range to include one slot 142 relative to the center of rotation of the rotor 100.

First, as shown in FIG. 5, the radial stress σ _r has a different distribution as the distance changes from the center of the inner part 140 to the outer direction. In particular, high stress is concentrated on the radius where the slot 142 is formed. Can be confirmed. (See "A" in FIG. 5)

However, relatively low stress occurred in the radial direction.

On the other hand, the circumferential stress (σ _θ ) as shown in FIG. 5 has a different distribution as the distance changes from the center of the inner portion 140 to the outward direction, the inner and outer directions of the slot 142, more specifically It can be seen that high stress is concentrated on a straight line in the outward direction from the center of the rotor (100) (see section "B" in Fig. 5).

In summary, the slot 142 may predict that deformation may occur due to high stress in left / right and front / rear directions when the rotor 100 rotates at a high speed.

In addition, when the rotor 100 rotates at a high speed, the inner part 140 is pushed outward and deformation occurs, and the deformation is as shown in FIG. 6.

That is, since the inner portion 140 is pushed outward with respect to the center, the inner circumferential surface on which the hub 120 is located is compressed by "C" in FIG. 6 in the outer direction so that the slot 142 is elliptical. Will transform into phases.

Therefore, in the embodiment of the present invention as described above in order to prevent deformation of the inner portion 140 (part where the hub 120 is coupled), the inner portion 140 is subjected to a compressive force by the hub 120 Are combined.

In addition, the slot 142 is provided with a core 180.

7 is a cross-sectional view showing the configuration of a second embodiment of a lightweight hybrid fixed-angle rotor for a centrifuge according to the present invention. Referring to FIG. 7, the core portion 180 is provided inside the slot 142. .

The core portion 180 is formed to have an outer size and shape corresponding to the inner size and shape of the slot 142, and prevents deformation and damage of the slot 142 due to stress occurring outside the slot 142. Be sure to

Accordingly, the core portion 180 may be formed of a composite material by RTM (resin transfer molding), and may be coupled to the inside of the slot 142 by interference fit, or fixed inside the slot 142 using a separate adhesive member. May be In addition, the inner circumferential surface of the core portion 180 and the outer circumferential surface of the slot 142 may be machined so as to be fastened to each other.

In designing the inner side 140 and the outer side 160, the rigidity of the inner side 140 is configured to be 1/5 or less of the outer side 160. That is, the inner portion 140 was applied to the polymer, the outer portion 160 is configured to apply a composite material.

In addition, when the URN300 grade or more composite material having a rigidity of 370 GPa in the fiber direction is applied to the outer portion 160, the inner portion 140 may be applied to an aluminum alloy, magnesium alloy, etc. having a rigidity of 70 GPa or less. I've done it.

In addition, in the centrifuge rotor 100 according to the present invention, the hub 120 and the inner portion 140 is designed to be in a state in which pressure is generated.

That is, as described above when combining the hub 120 and the inner portion 140, the tolerance of the hub 120 to +, the tolerance of the inner portion 140 by the predicted radius expansion of the inner portion 140 at the target rotational speed By managing with-, it was configured to be combined with interference fit using volume change by temperature difference.

As such, the inner portion 140 is preferably coupled to the pressurized state by the hub 120 so that the deformation amount (“C” of FIG. 6) that may increase during the high speed rotation may be compensated for.

In addition, the centrifuge rotor 100 according to the embodiment of the present invention is provided with a core portion 180 inside the slot 142, the core portion 180 of the material constituting the inner portion 140 It was to be formed of a material having a higher rigidity.

For example, the core part 180 may be molded into a composite material by RTM (resin transfer molding), or may be molded by winding a composite material in a B-stage state, or may be molded by processing a metal.

Taken together, the rotor 100 has a rigidity of less than 1/5 of the inner portion 140 is significantly lower than the outer portion 160, and the hub 120 has a higher rigidity than the inner portion 140, The hub 120 is coupled in a state where a pressure is applied to the inner portion 140.

The coupling structure of the hub 120 and the inner part 140 may be variously implemented as shown in FIGS. 8 to 10 below.

Hereinafter, a configuration of another embodiment of the rotor 100 will be described with reference to FIGS. 8 to 10.

8 to 10 are cross-sectional views showing the configuration of the third embodiment to the fifth embodiment of the centrifuge rotor 100 according to the present invention, the hub 120 and the inner portion 140 in a state in which pressure is generated from each other Various embodiments are intended to be combined.

That is, as described above, in the embodiment of FIGS. 4 and 7, the hollow cylindrical hub 120 is applied and coupled to each other using a volume change caused by the temperature difference between the hub 120 and the inner part 140. The hub 120 at 8 is constructed to have a hollow truncated conical shape by puncturing the center portion and inclining the outer surface such that the hub 120 is forcibly fitted in the center of the inner portion 140.

Accordingly, the hub 120 is coupled to the inner portion 140 in a state in which pressure is applied to the outer side, and the inner portion 140 is moved even if the inner portion 140 is moved outward by high speed rotation. Since is coupled in the pressurized state by the hub 120 will be able to compensate for such a deformation amount.

In addition, although not shown, if necessary, the hub 120 may further include a flange, a rib, and the like based on the hollow truncated cone shape.

Meanwhile, FIGS. 9 and 10 further include a separate coupling member 190 to allow the hub 120 to be coupled in a state where a pressure is applied to the inner portion 140.

That is, in FIG. 9, the coupling member 190 is provided on the upper side of the hub 120, and the upper portion of the hub 120 and the lower portion of the coupling member 190 are coupled to each other to be screwed to the coupling member 190. ) And the hub 120 to be coupled in a state in which pressure is applied to the inner portion 140 from the hub 120 when coupled.

In FIG. 10, a separate fastening member 192 penetrates the coupling member 190, and the fastening member 192 pulls the hub 120 upward by screwing the upper portion of the hub 120. Simultaneously with the raising, pressure was applied to the inner portion 140.

The scope of the present invention is not limited to the above-described embodiments, and many other modifications based on the present invention will be possible to those skilled in the art within the scope of the present invention.

100. Rotor 120. Hub
140. Inner side 142. Slot
160. Outside 180. Deep
190. Coupling member 192. Fastening member

Claims (14)

An outer portion formed of a composite material reinforced with fibers at least in the circumferential direction,
An inner part located in the inner part of the outer part and having stiffness of 1/5 or less of the outer part stiffness and provided with a plurality of slots;
Light weight composite fixed angle rotor for a centrifuge having a higher rigidity than the inner portion, having an outer diameter larger than the inner diameter of the inner portion, and comprising a hub coupled to a state where pressure is applied to the inner portion of the inner portion. . An outer portion formed of a composite material reinforced with fibers at least in the circumferential direction,
An inner part located in the inner part of the outer part and having stiffness of 1/5 or less of the outer part stiffness and provided with a plurality of slots;
A hub having a higher rigidity than the inner part, having an outer diameter larger than the inner diameter of the inner part, and coupled to a pressure applied to the inner part of the inner part,
Lightweight hybrid fixed-angle rotor for a centrifuge, characterized in that formed with a material having a higher rigidity than the inner portion comprises a core provided in the slot. An outer portion formed of a composite material reinforced with fibers at least in the circumferential direction,
An inner part located in the inner part of the outer part and having stiffness of 1/5 or less of the outer part stiffness and provided with a plurality of slots;
A hub having a higher rigidity than the inner part, having an outer diameter larger than the inner diameter of the inner part, and coupled to a pressure applied to the inner part of the inner part,
A core part formed of a material having a higher rigidity than the inner part and provided in the slot;
Lightweight hybrid fixed-angle rotor for a centrifuge, characterized in that it comprises a coupling member coupled to one side of the hub to force the hub to apply pressure to the inner portion. 4. The lightweight hybrid fixed-angle rotor of claim 1, wherein the hub is formed on the basis of a hollow cylindrical shape. 4. The lightweight hybrid fixed-angle rotor of claim 1, wherein the hub is formed based on a hollow truncated cone shape. 5. The light weight hybrid fixed angle rotor for a centrifuge according to any one of claims 1 to 3, wherein the outer side portion is attached to the inner side portion. The light weight hybrid fixed angle rotor for a centrifuge according to any one of claims 1 to 3, wherein the outer portion has an inner diameter smaller than the outer diameter of the inner portion. The light weight hybrid fixed-angle rotor for a centrifuge of claim 6, wherein the outer portion is formed by winding a filament or a fiber a plurality of times on the outer surface of the inner portion and then injecting and curing a polymer resin. The light weight hybrid fixed-angle rotor for a centrifuge according to claim 6, wherein the outer part is formed by winding a plurality of filaments or fibers impregnated with a polymer resin on the outer surface of the inner part and curing the fiber. The lightweight hybrid fixed-angle rotor for a centrifuge as claimed in claim 6, wherein the outer portion is formed by winding a composite material in a B-stage state on the outer surface of the inner portion and curing the wound. The light weight hybrid fixed-angle rotor for a centrifuge as claimed in claim 6, wherein the outer portion is coupled to the inner portion by an adhesive member. 4. The lightweight hybrid fixed-angle rotor of claim 2 or 3, wherein the core is molded into a composite by resin transfer molding (RTM). [4] The lightweight hybrid fixed-angle rotor as claimed in claim 2 or 3, wherein the core portion is coupled to the inside of the slot by any one of an interference fit coupling, a screw coupling, and a coupling using an adhesive member. 4. The lightweight hybrid fixed-angle rotor as claimed in any one of claims 1 to 3, wherein the inner portion is formed by injection molding or machining.

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