Centrifugal machine rotor and centrifugal machine

Abstract

The invention relates to the technical field of centrifugal machines, and discloses a centrifugal machine rotor which comprises a center plate, an inner inclined plate and an outer inclined plate. An inner ring of the inner inclined plate is fixedly butted with an outer ring of the central plate, the inner inclined plate is obliquely arranged from bottom to top from inside to outside, and a plurality of penetration holes for penetration of centrifugal tubes are formed in the inner inclined plate at intervals in the circumferential direction; the inner ring of the outer inclined plate is fixedly butted with the outer ring of the inner inclined plate, a plurality of limiting parts are formed on the outer inclined plate at intervals along the circumferential direction, and the plurality of limiting parts and the plurality of penetration holes are arranged in a one-to-one correspondence manner; the center plate, the inner inclined plates and the outer inclined plates are of an integrated structure by stamping metal plates. The invention further discloses the centrifugal machine.

Description

Technical Field

[0001] This application relates to the field of centrifuge technology, such as a centrifuge rotor and a centrifuge. Background Technology

[0002] Centrifuges are indispensable sample separation equipment in fields such as biomedicine, clinical testing, and bioengineering. Their core working principle is to use the centrifugal force generated by the high-speed rotation of the rotor to achieve rapid stratification and separation of components with different densities in a sample. As the core actuator of the centrifuge, the rotor's structure and manufacturing process directly determine the centrifuge's separation efficiency, operational stability, and operating costs.

[0003] With the increasing demands for sample processing efficiency and cost-effectiveness in the biopharmaceutical industry, lightweight, high-strength, and low-cost aluminum rotors have become the mainstream choice for benchtop low-speed ambient temperature centrifuges. Optimizing their structural design and manufacturing processes has become a key focus of industry R&D. In existing technologies, the most common aluminum rotors for benchtop low-speed ambient temperature centrifuges are split rotor structures manufactured using aluminum sheet spinning. These rotors typically consist of two independent components: two aluminum sheets are first spun and then assembled into a complete rotor using welding, bolting, and other assembly methods. The upper component has through holes for inserting centrifuge tubes, while the lower component has corresponding limiting structures to support and position the centrifuge tubes, meeting basic centrifugation requirements.

[0004] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art: The split aluminum spun rotor needs to be spun in two stages and requires additional assembly steps. The overall processing flow is complicated and involves many steps, which not only significantly increases production time costs but also raises the overall manufacturing cost of the equipment. Summary of the Invention

[0005] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0006] This disclosure provides a centrifuge rotor and a centrifuge to reduce the production cost of the centrifuge rotor and improve the structural strength of the rotor.

[0007] In some embodiments, the centrifuge rotor includes a center plate, an inner inclined plate, and an outer inclined plate. The center plate has bolt holes for assembly and fixing. The inner inclined plate has an inner ring that is fixedly connected to the outer ring of the center plate. The inner inclined plate is inclined from the inside out and from bottom to top, and has a plurality of insertion holes spaced apart circumferentially for inserting centrifuge tubes. The outer inclined plate has an inner ring that is fixedly connected to the outer ring of the inner inclined plate. The outer inclined plate has a plurality of limiting portions spaced apart circumferentially, and the plurality of limiting portions correspond one-to-one with the plurality of insertion holes. The center plate, the inner inclined plate, and the outer inclined plate are integrally formed by stamping metal plates.

[0008] In some embodiments, the outer inclined plate includes an outer inclined portion and a skirt, wherein the inner ring of the outer inclined portion is connected to the outer ring of the inner inclined plate, and the outer inclined portion is inclined from the inside to the outside and from top to bottom; the skirt is connected at the top to the bottom end of the outer inclined portion, and the limiting portion is formed on the skirt.

[0009] In some embodiments, the limiting portion is a plurality of limiting holes formed on the skirt, and the plurality of limiting holes are coaxial with or at corresponding angles to radially limit the inserted centrifuge tube.

[0010] In some embodiments, the limiting portion is a plurality of limiting grooves formed by the bottom end of the skirt being recessed upwards, and the plurality of limiting grooves correspond one-to-one with the plurality of insertion holes to radially position the centrifuge tube.

[0011] In some embodiments, the inclination angle of the inner inclined plate from the inside to the outside is 40° to 60°, and the inclination direction of the inner inclined plate is adapted to the radial force direction after the centrifuge tube is installed.

[0012] In some embodiments, the inclination angle of the outer oblique portion from the inside to the outside is 30° to 50°.

[0013] In some embodiments, the included angle between the inner inclined plate and the outer inclined plate is 80° to 90°.

[0014] In some embodiments, the insertion hole is an elliptical hole, with the minor axis of the elliptical hole arranged circumferentially along the inner inclined plate and the major axis of the elliptical hole arranged radially along the inner inclined plate.

[0015] In some embodiments, after the centrifuge tube is inserted into the insertion hole, the groove wall of the limiting groove is clearance-fitted with the outer wall of the centrifuge tube.

[0016] In some embodiments, a rubber lining layer is also attached to the wall of the insertion hole, the rubber lining layer being used to buffer the contact impact between the centrifuge tube and the wall of the insertion hole.

[0017] In some embodiments, the skirt edge is further provided with a plurality of weight-reducing grooves, which are distributed at intervals along the circumference of the skirt edge, and the weight-reducing grooves are staggered with the limiting portion.

[0018] In some embodiments, the centrifuge includes the centrifuge rotor described above.

[0019] The centrifuge rotor and centrifuge provided in this disclosure can achieve the following technical effects: The centrifuge rotor provided in this embodiment only requires stamping and blanking of a single-layer metal plate and one-time stamping forming, which greatly simplifies the processing flow, reduces process time and mold investment, and lowers the production and manufacturing cost of the rotor. The one-piece stamping structure has no assembly gap, which can make the overall structure of the rotor symmetrical, effectively reducing eccentric vibration during high-speed rotation and improving the stability of centrifuge operation. The one-to-one correspondence between the inner inclined plate through hole and the outer inclined plate limiting part forms a two-point force system for the centrifuge tube. Combined with the one-piece overall structure, the circumferential force strength of the rotor is greatly improved, and it has a higher limiting speed compared with the split rotor of the same specification.

[0020] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0021] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein: Figure 1 This is a schematic diagram of the structure of a centrifuge rotor provided in an embodiment of this disclosure; Figure 2 This is a schematic diagram of another centrifuge rotor provided in an embodiment of this disclosure; Figure 3 yes Figure 2 A cross-sectional view along line A to A'; Figure 4 This is a schematic diagram of another centrifuge rotor provided in an embodiment of this disclosure; Figure 5 This is a schematic diagram of another centrifuge rotor provided in an embodiment of this disclosure; Figure 6 This is a schematic diagram of another centrifuge rotor provided in an embodiment of this disclosure.

[0022] Figure label: 100: Center plate; 101: Bolt hole; 200: Inner inclined plate; 201: Through hole; 300: Outer inclined plate; 310: Outer inclined part; 320: Skirt; 321: Limiting part; 322: Limiting hole; 323: Limiting groove; 330: Weight reduction groove. Detailed Implementation

[0023] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0024] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0025] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better describing the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this disclosure according to the specific circumstances.

[0026] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0027] Unless otherwise stated, the term "multiple" means two or more.

[0028] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0029] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0031] Combination Figures 1 to 6 As shown, this embodiment of the present disclosure provides a centrifuge rotor, which includes a center plate 100, an inner inclined plate 200, and an outer inclined plate 300. The center plate 100 has bolt holes 101 for assembly and fixing. The inner ring of the inner inclined plate 200 is fixedly connected to the outer ring of the center plate 100. The inner inclined plate 200 is inclined from the inside out and from the bottom up. The inner inclined plate 200 has a plurality of insertion holes 201 for inserting centrifuge tubes at intervals along the circumference. The inner ring of the outer inclined plate 300 is fixedly connected to the outer ring of the inner inclined plate 200. The outer inclined plate 300 has a plurality of limiting parts 321 at intervals along the circumference. The plurality of limiting parts 321 are arranged one-to-one with the plurality of insertion holes 201. The center plate 100, the inner inclined plate 200, and the outer inclined plate 300 are integrally formed by stamping metal plates.

[0032] In this embodiment, the center plate 100 is the core assembly area of ​​the rotor, and the number of bolt holes 101 on it can be set according to the assembly requirements of the centrifuge spindle. For example, there are three bolt holes, which are evenly distributed in a ring around the center of the center plate 100. The bolt holes 101 are used to securely lock the entire rotor onto the drive components of the centrifuge, preventing radial or axial loosening during rotation.

[0033] The inner inclined plate 200 is the main load-bearing component of the centrifuge tube. The phrase "inclined from the inside out and from bottom to top" refers to the fact that the surface of the inner inclined plate 200 is tilted upwards relative to the rotation axis of the centrifuge, and the direction of tilt is consistent with the radial force generated by centrifugal force after the centrifuge tube is inserted. The insertion holes 201 spaced around the circumference of the inner inclined plate 200 are the insertion channels for the centrifuge tube.

[0034] The outer inclined plate 300 is a structural component of the centrifuge rotor and also serves as a limiting part 321 for the centrifuge tubes. The limiting parts 321 formed circumferentially on the outer inclined plate 300 correspond one-to-one with the multiple through holes 201 of the inner inclined plate 200, so that each centrifuge tube can be positioned. The center plate 100, the inner inclined plate 200 and the outer inclined plate 300 are integrally connected by stamping and stretching metal plates, without splicing gaps.

[0035] The centrifuge rotor provided in this embodiment has two usage forms: the first is a direct test tube installation form, in which the centrifuge tube is directly passed through the insertion hole 201 of the inner inclined plate 200 from the inside to the outside, so that the upper part of the centrifuge tube is in contact with the hole wall of the insertion hole 201 and bears force, while the lower part of the centrifuge tube is correspondingly inserted into the limiting part 321 of the outer inclined plate 300, realizing two-point fixation of the centrifuge tube with the upper part bearing force and the lower part being limited; the second is an installation form with an added test tube sleeve, in which the appropriate test tube sleeve is first installed. The test tube sleeve is pre-installed between the insertion hole 201 and the limiting part 321 of the rotor, so that the upper part of the test tube sleeve is inserted into the insertion hole 201 and the lower part is locked into the limiting part 321. Then, the centrifuge tube is placed into the test tube sleeve. The test tube sleeve can be made of flexible materials such as rubber or silicone, which can form a buffer protection for the centrifuge tube and avoid direct contact between the centrifuge tube and the metal rotor during high-speed centrifugation, thus preventing damage. This type is suitable for fragile or thin-walled centrifuge tubes and can also be adapted to centrifuge tubes of different diameters, improving the versatility of the rotor.

[0036] The centrifuge rotor provided in this embodiment only requires stamping and blanking of a single-layer metal plate and one-time stamping forming, which greatly simplifies the processing flow, reduces process time and mold investment, and lowers the production and manufacturing cost of the rotor; the one-piece stamping structure has no assembly gap, which can ensure the overall structural symmetry of the rotor, effectively reduce eccentric vibration during high-speed rotation, and improve the stability of centrifuge operation; the one-to-one correspondence between the inner inclined plate 200 through hole 201 and the outer inclined plate 300 limiting part 321 forms a two-point force system for the centrifuge tube. Combined with the one-piece overall structure, the circumferential force strength of the rotor is greatly improved, and it has a higher limiting speed compared with the split rotor of the same specification.

[0037] Optionally, the outer inclined plate 300 includes an outer inclined portion 310 and a skirt 320, wherein the inner ring of the outer inclined portion 310 is connected to the outer ring of the inner inclined plate 200, and the outer inclined portion 310 is inclined from the inside to the outside and from top to bottom; the skirt 320 is connected to the bottom end of the outer inclined portion 310 at the top, and a limiting portion 321 is formed on the skirt 320.

[0038] The outer inclined section 310 is a transition structure connecting the inner inclined plate 200 and the skirt 320. The outer inclined plate 300 is symmetrically distributed with the inner inclined plate 200 being inclined from the inside out and from the bottom up. The cross-section is shaped like a mountain peak with the tip pointing upwards.

[0039] The inner ring of the outer inclined portion 310 and the outer ring of the inner inclined plate 200 are integrally stamped and connected without seams. The skirt 320 is the end structure of the outer inclined plate 300. Its top and the bottom of the outer inclined portion 310 are also integrally stamped. The skirt 320 is generally in the shape of an annular cylinder. Its axial height needs to match the length of the centrifuge tube so that the lower part of the centrifuge tube can be effectively limited. The limiting part 321 is directly formed on the skirt 320 without the need for subsequent additional processing. Its forming position corresponds to the insertion hole 201 of the inner inclined plate 200. It can be formed in one step through the cavity design of the stamping die.

[0040] The outer inclined plate 300 and the skirt 320 can form a stable fit with the centrifuge tube or test tube sleeve. In the direct installation of the test tube, the inclined plate surface of the outer inclined part 310 can provide auxiliary guidance for the middle area of ​​the centrifuge tube, preventing the centrifuge tube from shifting during insertion. At the same time, the limiting part 321 on the skirt 320 can radially limit the bottom of the centrifuge tube. Combined with the upper bearing of the insertion hole 201 of the inner inclined plate 200, an installation structure with upper bearing, middle guidance, and lower limiting is formed. In the installation method with the addition of a test tube sleeve, the outer inclined part 310 can provide close support to the outer wall of the test tube sleeve, reducing the deformation of the test tube sleeve caused by centrifugal force. The limiting part 321 of the skirt 320 is engaged with the bottom end of the test tube sleeve, so that the test tube sleeve does not move radially during high-speed centrifugation, further improving the installation stability of the centrifuge tube.

[0041] With this configuration, the outer inclined section 310 and the inner inclined plate 200 are tilted symmetrically in opposite directions, forming a symmetrical structure similar to a "frustum" of a cone. Compared to the asymmetrical splicing structure of traditional split rotors, its dynamic balance performance during rotation is greatly improved, effectively reducing the vibration of the entire machine during operation. The one-piece stamped skirt 320 structure has no weak connection points. Compared to the assembled limiting structure of split rotors, it has a stronger ability to bear centrifugal loads. Combined with the precise forming of the limiting section 321, it can further enhance the stability of the two-point force system. Thirdly, the transition structure of the outer inclined section 310 avoids the direct bending connection between the inner inclined plate 200 and the skirt 320, reducing stress concentration at the structural corners, improving the overall fatigue strength of the rotor, extending the service life of the rotor, and avoiding the problems of easy breakage at the splicing points and easy failure of the limiting structure in traditional split rotors.

[0042] Optionally, the limiting part 321 is a plurality of limiting holes 322 opened on the skirt 320. The plurality of limiting holes 322 are coaxial with the plurality of insertion holes 201 or are at corresponding angles to radially limit the inserted centrifuge tube.

[0043] The number of limiting holes 322 is consistent with the number of through holes 201 in the inner inclined plate 200, and they are evenly distributed along the circumference of the skirt 320. The opening positions correspond one-to-one with the radial projection of the through holes 201. The limiting holes 322 and the through holes 201 are coaxially fitted, and their central axes completely coincide in space. The corresponding angle fit refers to the fact that the central axis of the limiting hole 322 is at an angle of 5° to 10° relative to the central axis of the through hole 201. This fit can use the angular deviation to offset part of the radial load caused by centrifugal force, further improving the limiting stability. It should be noted that the limiting holes 322 and the skirt 320 are integrally stamped and formed, and no subsequent drilling processing is required.

[0044] In practical use, the limiting hole 322 can form a precise cooperative limiting system with the insertion hole 201 of the inner inclined plate 200: In the case of direct installation of test tubes, after the centrifuge tube passes through the insertion hole 201 of the inner inclined plate 200 from top to bottom, the bottom end of the centrifuge tube passes through the limiting hole 322 of the skirt 320. At this time, the upper tube wall of the centrifuge tube is in contact with the wall of the insertion hole 201 to achieve load bearing, and the lower tube wall is in contact with the wall of the limiting hole 322 to achieve radial limiting, forming a two-point force-bearing structure with upper load bearing and lower radial limiting, preventing the centrifuge tube from being damaged during high-speed rotation. Radial movement or circumferential displacement may occur during rotation. In the installation method with the addition of a test tube sleeve, the upper part of the test tube sleeve is first inserted into the insertion hole 201 and the lower part passes through the limiting hole 322, so that the test tube sleeve and the rotor form a stable connection. Then, the centrifuge tube is placed inside the test tube sleeve. At this time, the limiting hole 322 can radially constrain the test tube sleeve, preventing the test tube sleeve from deforming or displacing under the action of centrifugal force, indirectly ensuring the installation stability of the centrifuge tube. At the same time, the test tube sleeve can buffer the direct contact between the centrifuge tube and the metal limiting hole 322, reducing the risk of centrifuge tube breakage.

[0045] With this configuration, the precise coaxial or angular fit between the limiting hole 322 and the insertion hole 201 solves the problem of large assembly errors in the traditional split aluminum spun rotor limiting structure, ensures the coaxiality of the centrifuge tube installation, improves the dynamic balance performance of the rotor at high speed, and reduces the vibration of the whole machine during operation.

[0046] Optionally, the limiting part 321 is a plurality of limiting grooves 323 formed by the bottom end of the skirt 320 being recessed upward, and the plurality of limiting grooves 323 correspond one-to-one with the plurality of insertion holes 201 to radially position the centrifuge tube.

[0047] In this embodiment, the limiting groove 323 is formed by pressing and recessing the bottom end of the skirt 320 upwards, and is part of an integral structure, requiring no subsequent welding or cutting processing. For example, the groove shape of the limiting groove 323 is an arc groove, and the axial depth of the groove is 10 to 20 mm.

[0048] During use, the limiting groove 323 can form a flexible and stable positioning fit with the centrifuge tube / test tube sleeve: In the direct installation of the test tube, after the centrifuge tube passes through the inner inclined plate 200 and the insertion hole 201 from top to bottom, the bottom of the centrifuge tube is inserted into the corresponding limiting groove 323 with the bottom facing upward. At this time, the upper tube wall of the centrifuge tube fits against the wall of the insertion hole 201 to bear the centrifugal force, while the lower tube wall fits against the arc groove wall of the limiting groove 323 to achieve radial positioning. The arc structure of the groove can adapt to the arc of the centrifuge tube. The flexible tube sleeve is designed to prevent localized stress concentration that could damage the centrifuge tubes. In the installation method with the added tube sleeve, the upper part of the sleeve is first inserted into the insertion hole 201, and then the bottom end of the sleeve is inserted into the limiting groove 323, creating a fixed state where the sleeve is inserted at the top and locked at the bottom. The centrifuge tube is then inserted into the sleeve. The limiting groove 323 restricts the circumferential rotation and radial movement of the sleeve, indirectly ensuring the stability of the centrifuge tube installation. Simultaneously, the flexible sleeve further buffers the impact of the centrifuge tube contacting the metal groove.

[0049] Compared to the assembly-type limiting structure of traditional split aluminum spun rotors, this design, with its arc-shaped limiting groove 323, conforms to the bottom contour of the centrifuge tube and provides sufficient tolerance in groove width. This solves the problems of poor adaptability and easy scratching of centrifuge tubes associated with traditional limiting structures, while also simplifying installation by allowing centrifuge tube positioning without precise alignment. The limiting groove 323 and the skirt 320 are an integrated structure, giving it a significantly higher capacity to bear centrifugal loads than assembled limiting components. Combined with the load-bearing structure of the inner inclined plate 200 and the through hole 201, this strengthens the rotor's circumferential stress and increases its maximum speed. Furthermore, compared to the limiting hole 322, the limiting groove 323 provides the centrifuge rotor with higher structural strength.

[0050] Optionally, the inclination angle of the inner inclined plate 200 from the inside to the outside is 40° to 60°, and the inclination direction of the inner inclined plate 200 is adapted to the radial force direction after the centrifuge tube is installed.

[0051] In this embodiment, the inclination angle from the inside out and from bottom to top refers to the angle between the surface of the inner inclined plate 200 and the rotation axis of the centrifuge rotor, and its value range is limited to 40° to 60°. This angle range is compatible with the one-piece stamping process, and can be formed in one step through the mold cavity without the need for subsequent shaping processes. The inclination direction of the inner inclined plate 200 "from the inside out and from bottom to top" is adapted to the radial component of the centrifugal force experienced by the centrifuge tube during high-speed rotation after it is installed, which allows the centrifugal load to be evenly transmitted to the entire rotor along the surface of the inner inclined plate 200, avoiding stress concentration in local areas.

[0052] This design reduces or avoids localized stress concentration in the rotor when the centrifuge tubes rotate at high speed. Combined with the integrated stamping structure, the overall circumferential strength of the rotor is significantly improved.

[0053] Optionally, the inclination angle of the outer slope 310 from the inside to the outside is 30° to 50°.

[0054] In this embodiment, the definition and adaptation logic of the tilt angle of the outer inclined portion 310 are explained as follows: "Inclination angle from the inside out and from top to bottom" refers to the angle between the plate surface of the outer inclined portion 310 and the rotation axis of the centrifuge rotor, and its value range is limited to 30° to 50°. This angle range can form a cooperative support system with the inner inclined plate 200: In the case of direct installation of test tubes, the inclined plate surface of the outer inclined portion of 30° to 50° can form a close guide on the outer side of the middle part of the centrifuge tube, and in conjunction with the bearing force of the inner side of the centrifuge tube by the inner inclined plate 200, the radial force of the centrifuge tube is evenly distributed to both sides of the rotor, avoiding bending or damage of the centrifuge tube caused by unilateral force; In the case of installation with the addition of a test tube sleeve, the tilt angle of the outer inclined portion 310 can be adapted to the outer taper of the test tube sleeve, so that the contact area between the test tube sleeve and the rotor is increased by more than 30%, which not only improves the installation stability of the test tube sleeve, but also disperses the centrifugal load through a larger contact area, preventing the test tube sleeve from deforming or falling off at high speed.

[0055] This design mitigates the problem of high-speed rotational vibration caused by the asymmetry of traditional rotor structures, improves the dynamic balance accuracy of the rotor, and reduces the overall operating noise. This angle range is suitable for integrated stamping processes, allowing for one-time forming through the mold cavity without the need for subsequent angle shaping processes. The 310° angle design of the outer inclined section enhances the rotor's circumferential load-bearing capacity, and combined with the force-bearing structure of the inner inclined plate 200, significantly improves the overall strength of the rotor against centrifugal loads.

[0056] Optionally, the included angle between the inner inclined plate 200 and the outer inclined plate 300 is 80° to 90°.

[0057] The angle between the inner inclined plate 200 and the outer inclined plate 300 specifically refers to the angle formed at the junction of the extension line of the inner inclined plate 200 and the extension line of the outer inclined part 310 in the outer inclined plate 300. The value range is limited to 80° to 90°. This angle range is determined by combining the rotor integrated stamping process, the structural symmetry requirements, and the load closed-loop transmission requirements of the two-point force system. In practical use, an angle of 80° to 90° can construct a stable structure and force system: In the case of direct installation of test tubes, this angle allows the centrifuge tube bearing surface of the inner inclined plate 200 and the guide limiting surface of the outer inclined plate 300 to form a near right angle of cooperative constraint, so that the centrifuge tube is in a stable inclined posture after being installed. The radial component of the centrifugal force can be transmitted to the rotor center along the plate surface of the inner inclined plate 200, and then form a load closed loop through the reverse support of the outer inclined plate 300, avoiding the accumulation of load in local areas. In the case of installation with the addition of a test tube sleeve, the angle of 80° to 90° can be perfectly matched with the taper of the test tube sleeve, so that the upper part of the test tube sleeve fits tightly with the insertion hole 201 of the inner inclined plate 200, and the middle part is seamlessly supported with the plate surface of the outer inclined part 310, which greatly improves the installation stability of the test tube sleeve.

[0058] This configuration improves the rotor's dynamic balance performance; the included angle range is highly compatible with the one-piece stamping process, allowing for one-time molding using a mold; it strengthens the overall structural strength of the rotor, and combined with the upper and lower two-point force-bearing system, significantly enhances the rotor's circumferential load-bearing capacity. For example, for a 6*50mL rotor of the same specification, the maximum speed can be increased to 8000 rpm.

[0059] Optionally, the insertion hole 201 is an elliptical hole, with the minor axis of the elliptical hole arranged along the circumference of the inner inclined plate 200 and the major axis of the elliptical hole arranged along the radial direction of the inner inclined plate 200.

[0060] The elliptical hole is the core channel on the inner inclined plate 200 for precise positioning and rotational adaptation of the centrifuge tube. "The short axis is set circumferentially along the inner inclined plate 200" means that the extension direction of the short axis is consistent with the tangent direction of the rotor's circumference, and the length of the short axis is precisely matched with the outer diameter of the centrifuge tube. This is used to radially limit the centrifuge tube and prevent circumferential movement when the centrifuge tube rotates at high speed. "The long axis is set radially along the inner inclined plate 200" means that the extension direction of the long axis is consistent with the radial direction of the rotor, and the length of the long axis is 3 to 6 mm longer than the short axis. This length difference is specifically reserved to allow rotation space for the centrifuge tube when it rotates at high speed, ensuring that the centrifuge tube can rotate slightly upward at the bottom end inside the insertion hole 201 without hard interference with the hole wall during rotation.

[0061] During use, after the centrifuge tube is inserted into the elliptical hole, the upper wall of the centrifuge tube fits tightly against the wall of the elliptical hole along its minor axis, achieving basic axial and radial limiting and preventing axial displacement and large radial offset of the centrifuge tube. When the rotor starts and accelerates to the operating speed, the bottom of the centrifuge tube moves slightly upward under the action of centrifugal force. The space reserved in the major axis direction of the elliptical hole provides sufficient margin for this rotational movement, preventing the hole wall from obstructing the rotation. After the centrifuge tube rotates to the preset angle, its bottom outer wall will fit tightly against the limiting part 321 on the skirt 320. At this time, the limiting part 321 plays a stopping role, restricting the centrifuge tube from continuing to rotate.

[0062] This configuration allows for a tight fit between the centrifuge tube and the limiting part 321 through slight rotation, improving the uniformity of force transmission. The slight rotation of the centrifuge tube enables the rotor to automatically achieve balance during rotation, thus improving the stability of the centrifuge rotor.

[0063] Optionally, after the centrifuge tube passes through the insertion hole 201, the groove wall of the limiting groove 323 is clearance-fitted with the outer wall of the centrifuge tube.

[0064] In this embodiment, the clearance fit means that after the centrifuge tube is inserted into place, there is a gap of 0.2 to 2 mm between its outer wall and the wall of the limiting groove 323. This gap can accommodate radial deformation during high-speed rotation and the fault tolerance requirements during rotor assembly.

[0065] In practical use, this gap fit can achieve a flexible and stable limiting effect: in the case of direct installation of test tubes, after the centrifuge tube is inserted into the inner inclined plate 200 through the insertion hole 201 and the bottom falls into the limiting groove 323, the gap between the groove wall and the outer wall of the centrifuge tube can accommodate the small radial deformation generated when the centrifuge tube rotates at high speed. At the same time, the reserved gap reduces the difficulty of alignment when installing centrifuge tubes and improves the convenience of operation.

[0066] This configuration allows for compatibility with centrifuge tubes of various sizes, expanding the rotor's applicability.

[0067] Optionally, a rubber lining layer is also attached to the wall of the insertion hole 201 to buffer the impact between the centrifuge tube and the wall of the insertion hole 201.

[0068] The rubber lining is a flexible protective layer covering the inner wall of the insertion hole 201. In the direct installation configuration, after the centrifuge tube is inserted into the hole 201, its outer wall directly contacts the rubber lining. Compared to the rigid contact with the metal hole wall, the flexible rubber lining absorbs the insertion and removal impact of the centrifuge tube, preventing scratches or damage to the tube opening or wall. When the rotor operates at high speed, the rubber lining buffers the high-frequency impact generated by the centrifuge tube's vibration, while also absorbing some rotational noise, reducing the overall operating noise level. In the installation configuration with an added test tube sleeve, the rubber lining is sandwiched between the wall of the insertion hole 201 and the test tube sleeve. It fills the gap through elastic deformation, improving the installation stability of the test tube sleeve, and also buffers the frictional impact between the test tube sleeve and the metal hole wall, preventing wear and cracking after long-term use and extending the service life of the test tube sleeve.

[0069] Optionally, the skirt edge 320 is also provided with a plurality of weight-reducing grooves 330, which are distributed at intervals along the circumference of the skirt edge 320, and the weight-reducing grooves 330 are staggered with the limiting part 321.

[0070] The weight-reducing grooves 330 are recessed structures formed on the skirt 320, integrally stamped with the skirt 320 and the limiting part 321, requiring no subsequent machining. They are evenly distributed circumferentially and staggered with the limiting part 321. In actual use, the weight-reducing grooves 330 do not contact the centrifuge tubes or test tube sleeves; they only optimize the overall mechanical properties of the rotor through structural weight reduction. The reduced overall weight of the rotor lowers the load on the centrifuge drive components, thus reducing energy consumption.

[0071] This design mitigates or avoids the problems of poor dynamic balance and severe vibration at high speeds caused by excessive weight in traditional rotors, reducing the rotor's rotational inertia and further improving dynamic balance accuracy. The weight-reducing groove 330 and the skirt 320 are integrally stamped, eliminating the need for additional weight-reduction processes. While ensuring the load-bearing strength of the skirt 320, lightweighting is achieved. Combined with the two-point force-bearing system of the inner inclined plate 200 and the outer inclined plate 300, the stress load during high-speed rotor rotation is reduced, indirectly improving the rotor's ultimate speed load-bearing capacity.

[0072] Optionally, the centrifuge rotor may also include a balance block and / or dynamic balancing punches.

[0073] After a centrifuge rotor is integrally formed by stamping, its center of mass distribution may not meet expectations due to process variations. After stamping, the center of mass position can be fine-tuned based on the rotor's dynamic balance. Adjustment methods include adding balance blocks in lighter areas via welding or screwing, or punching holes in heavier areas to reduce dynamic mass.

[0074] This configuration can improve the production qualification rate of centrifuge rotors and is beneficial to the subsequent use and maintenance of centrifuge rotors.

[0075] This disclosure provides a centrifuge, which includes the centrifuge rotor described above.

[0076] The centrifuge provided in this embodiment has a simplified overall structure and reduced manufacturing costs compared to traditional centrifuges that use split-type spinning rotors; the circumferential stress strength of the rotor is improved, thereby increasing the centrifuge's maximum speed.

[0077] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A centrifuge rotor, characterized by, include: The center plate has bolt holes for assembly and fixing; The inner inclined plate has its inner ring fixedly connected to the outer ring of the center plate. The inner inclined plate is inclined from the inside out and from the bottom up. The inner inclined plate has multiple insertion holes spaced apart along the circumference for inserting centrifuge tubes. An outer inclined plate, wherein the inner ring of the outer inclined plate is fixedly connected to the outer ring of the inner inclined plate, and the outer inclined plate forms a plurality of limiting parts at intervals along the circumference, and the plurality of limiting parts are provided in a one-to-one correspondence with the plurality of through holes; The central plate, the inner inclined plate, and the outer inclined plate are integrally formed by stamping metal plates.

2. The centrifuge rotor of claim 1, wherein, The outer inclined plate includes: The outer inclined portion has an inner ring that connects with the outer ring of the inner inclined plate, and the outer inclined portion is inclined from the inside out and from top to bottom. The skirt hem is connected at the top to the bottom end of the outer slope, and the limiting portion is formed on the skirt hem.

3. The centrifuge rotor according to claim 2, characterized in that, The limiting part consists of multiple limiting holes formed on the skirt. The multiple limiting holes are coaxial with or at corresponding angles to radially limit the inserted centrifuge tube.

4. The centrifuge rotor according to claim 2, characterized in that, The limiting part is a plurality of limiting grooves formed by the bottom end of the skirt being recessed upward, and the plurality of limiting grooves correspond one-to-one with the plurality of insertion holes to radially position the centrifuge tube.

5. The centrifuge rotor according to claim 2, characterized in that, The inclination angle of the inner inclined plate from the inside to the outside is 40° to 60°, and the inclination direction of the inner inclined plate is adapted to the radial force direction after the centrifuge tube is installed; and / or, The inclination angle of the outer oblique portion from the inside to the outside is 30° to 50°; and / or, The included angle between the inner inclined plate and the outer inclined plate is 80° to 90°.

6. The centrifuge rotor according to any one of claims 1 to 5, characterized in that, The insertion hole is an elliptical hole, with its minor axis oriented along the circumference of the inner inclined plate and its major axis oriented along the radial direction of the inner inclined plate.

7. The centrifuge rotor according to claim 6, characterized in that, After the centrifuge tube is inserted into the insertion hole, the groove wall of the limiting groove is clearance-fitted with the outer wall of the centrifuge tube.

8. The centrifuge rotor according to claim 6, characterized in that, A rubber lining layer is also attached to the wall of the insertion hole, which is used to buffer the impact of contact between the centrifuge tube and the wall of the insertion hole.

9. The centrifuge rotor according to any one of claims 1 to 5, characterized in that, The skirt edge is also provided with a plurality of weight-reducing grooves, which are distributed at intervals along the circumference of the skirt edge, and the weight-reducing grooves are staggered with the limiting part.

10. A centrifuge, characterized in that, Includes the centrifuge rotor as described in any one of claims 1 to 9.

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