A rotor and a centrifuge having the same

Abstract

The utility model discloses an embodiment provides a kind of rotor, including rotor body component and bottom plate component;Rotor body component includes rotor body ontology and the rotor body center axis of being arranged in the center of rotor body ontology, the circumference of the bottom of rotor body ontology has first plane;The circumference of bottom plate component has second plane;Bottom plate component is locked in the rotor body center axis, second plane abuts against first plane, and the included angle of second plane and first plane is greater than 0 degree.An embodiment of the utility model locks bottom plate component in the rotor body center axis of rotor body ontology center, the second plane of the circumference of bottom plate component abuts against the first plane of the circumference of the bottom of rotor body ontology, the included angle of second plane and first plane is greater than 0 degree, to close the bottom of rotor body ontology, reduce the assembly gap when bottom plate component is assembled to the bottom of rotor body ontology.

Description

Technical Field

[0001] This utility model relates to the field of centrifuge technology, and in particular to a rotor and a centrifuge having the same. Background Technology

[0002] Centrifuges are instruments used for separating biological samples and are widely used in life sciences, medicine, chemistry, environmental protection and other fields. The rotor is an important component of the centrifuge, used to hold the test tube containing the biological sample to be centrifuged and to prevent the biological sample from splashing out.

[0003] Maximum allowable load is one of the main parameters of a centrifuge, representing the total mass of the rotor and the test tubes and biological samples it can hold, which the centrifuge motor can drive. Under the same maximum allowable load, the smaller the rotor mass, the more biological samples it can hold. Therefore, to improve centrifugation efficiency, lightweight rotor design is often considered. This can be achieved by using lightweight materials such as aluminum alloys or engineering plastics to manufacture the rotor, or by hollowing out non-stressed or non-functional areas of the rotor to reduce weight.

[0004] Hollowing out the rotor to reduce weight creates a large groove at its bottom. During high-speed rotation, this uneven bottom increases wind resistance and unnecessarily increases motor power consumption. Installing a base plate to seal this groove creates a smoother, flatter rotor, achieving weight reduction without increasing wind resistance. However, this introduces another problem: if there's a gap when the base plate is installed, steam can pass through this gap into the groove during high-temperature steam sterilization. After cooling, steam accumulates there and cannot be manually wiped away. Over time, this corrodes the rotor, causing it to become unbalanced and posing unpredictable safety hazards during high-speed rotation. Utility Model Content

[0005] This utility model provides a rotor that aims to solve the problem of assembly gaps when the base plate is assembled to the bottom of the rotor in the prior art.

[0006] In a first aspect, a rotor is provided, including a rotor body assembly (2) and a base plate assembly (3). The rotor body assembly (2) includes a rotor body body (22) and a rotor body central shaft (23) disposed at the center of the rotor body body (22). The circumference of the bottom of the rotor body body (22) has a first plane (221). The circumference of the base plate assembly (3) has a second plane (31); Among them, the base plate assembly (3) is locked to the central shaft (23) of the rotor body, the second plane (31) abuts against the first plane (221), and the angle between the second plane (31) and the first plane (221) is greater than 0 degrees.

[0007] In a second aspect, a centrifuge is provided, including a motor, a drive shaft, a centrifuge chamber, and a rotor as described above; The drive shaft passes through the bottom of the centrifuge chamber, and the rotor is locked onto the drive shaft, so that the rotor is located inside the centrifuge chamber. The motor drives the drive shaft to rotate to perform the centrifugation operation.

[0008] In this embodiment of the utility model, the base plate assembly is locked to the rotor body central shaft at the center of the rotor body body. The second plane of the circumference of the base plate assembly abuts against the first plane of the bottom circumference of the rotor body body. The included angle between the second plane and the first plane is greater than 0 degrees, so as to close the bottom of the rotor body body and reduce the assembly gap when the base plate assembly is assembled to the bottom of the rotor body body. Attached Figure Description

[0009] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which: Figure 1 This is a schematic diagram of the bottom of the rotor body assembly provided in this embodiment of the present invention; Figure 2 This is an exploded view of the rotor provided in an embodiment of this utility model; Figure 3 This is a cross-sectional view of the rotor provided in an embodiment of the present utility model; Figure 4 yes Figure 3 A partial schematic diagram of region A in the middle; Figure 5 yes Figure 3 Another partial schematic diagram of region A in the middle; Figure 6 This is a schematic diagram of the centrifuge provided in an embodiment of the present invention. Detailed Implementation

[0010] The embodiments of this utility model are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar modules or modules having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. Rather, the embodiments of this utility model include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0011] In this embodiment of the utility model, the base plate assembly is locked to the rotor body central shaft at the center of the rotor body body. The second plane of the circumference of the base plate assembly abuts against the first plane of the bottom circumference of the rotor body body. The included angle between the second plane and the first plane is greater than 0 degrees, so as to close the bottom of the rotor body body and reduce the assembly gap when the base plate assembly is assembled to the bottom of the rotor body body.

[0012] Figure 1 This is a schematic diagram of the bottom of the rotor assembly provided in this embodiment of the present invention. Figure 2 This is an exploded view of the rotor provided in an embodiment of this utility model. Figure 3 This is a cross-sectional view of the rotor provided in an embodiment of this utility model. (Reference) Figures 1 to 3 The rotor includes a rotor cover assembly 1, a rotor body assembly 2, and a base plate assembly 3. The rotor body assembly 2 is shaped to fit the rotor cover assembly 1 and the base plate assembly 3, and all three are rotating bodies. The receiving cavity 21 of the rotor body assembly 2 is closed by the rotor cover assembly 1. At the bottom of the rotor body assembly 2, on the side opposite to the receiving cavity 21, the rotor body assembly 2 is hollowed out to reduce weight, forming a groove 24. The base plate assembly 3 is locked to the bottom of the rotor body assembly 2, sealing the groove 24. The rotor body assembly 2 includes a rotor body 22 and a rotor body central shaft 23. The rotor body 22 is a rotating body, and a hollow rotor body central shaft 23 is provided at its center. The rotor body 22 and the rotor body central shaft 23 can be a separate structure or a one-piece structure, which is not limited here.

[0013] During centrifugation, the rotor assembly 2 is fixed to the drive shaft (not shown in the figure), and then the test tube containing the biological sample to be centrifuged is placed into the rotor assembly 2. After the rotor cap assembly 1 is locked to the rotor assembly 2, the drive shaft rotates to perform the centrifugation operation. As another embodiment of this utility model, if the test tube itself has a closed cap, the rotor may not include the rotor cap assembly 1, and may only consist of the rotor assembly 2 and the base plate assembly 3.

[0014] Figure 4 yes Figure 3 A partial schematic diagram of region A in the middle. Figure 5 yes Figure 3 Another partial schematic diagram of region A in the middle. (See attached diagram.) Figure 4 and Figure 5 As shown, the rotor body 22 has a first plane 221 on its circumference at the bottom, and the base plate assembly 3 has a second plane 31 on its circumference. When the first plane 221 is horizontal, the second plane 31 is inclined and forms an angle with the first plane 221. The angle between the second plane 31 and the first plane 221 opens towards the rotor body's central axis 23. When the base plate assembly 3 is locked to the rotor body's central axis 23, the second plane 31 abuts against the first plane 221, and the angle between the second plane 31 and the first plane 221 is greater than 0 degrees.

[0015] In this embodiment of the invention, the end of the second plane 31 has a linear feature, such as a right angle. When the second plane 31 abuts against the first plane 221, the end of the second plane 31 contacts the first plane 221, that is, the right angle contacts the first plane 221, and a line contact is formed between the second plane 31 and the first plane 221, so as to better seal the bottom of the rotor body 22 and reduce the assembly gap between the base plate assembly 3 and the rotor body 22.

[0016] Furthermore, the base plate assembly 3 possesses a certain degree of elastic deformation capability. The horizontal plane where the rotor body central shaft 23 is located is higher than the horizontal plane where the first plane 221 is located, that is, the rotor body central shaft 23 is located within the groove 24. When the base plate assembly 3 is not locked to the rotor body central shaft 23, the angle between the second plane 31 and the first plane 221 is a large angle; when the base plate assembly 3 is locked to the rotor body central shaft 23, the circumference of the base plate assembly 3 is subjected to a downward force from the first plane 221, and the center of the base plate assembly 3 is subjected to an upward locking force, resulting in elastic deformation, and the angle between the second plane 31 and the first plane 221 becomes a smaller angle. That is, the angle between the second plane 31 and the first plane 221 when the base plate assembly 3 is locked to the rotor body central shaft 23 is smaller than the angle between the second plane 31 and the first plane 221 when the base plate assembly 3 is not locked to the rotor body central shaft 23. When locked, the second plane 31 of the base plate assembly 3 also exerts an upward force on the first plane 221 to seal the bottom of the rotor body 22. Figure 4 This is the state when the base plate assembly 3 is not locked to the rotor body central shaft 23, and the included angle between the second plane 31 and the first plane 221 is 4 degrees. Figure 5 When the base plate assembly 3 is locked to the central shaft 23 of the rotor body, the angle between the second plane 31 and the first plane 221 is 1 degree. A suitable material is selected to manufacture the base plate assembly 3, and the elastic deformation of the base plate assembly 3 is controlled so that when the base plate assembly 3 is locked to the central shaft 23 of the rotor body, the force between the second plane 31 and the first plane 221 is greater than or equal to a preset value, such as 50 Newtons, to meet the sealing requirements.

[0017] In this embodiment of the utility model, the base plate assembly is locked to the rotor body central shaft at the center of the rotor body body. The second plane of the circumference of the base plate assembly abuts against the first plane of the bottom circumference of the rotor body body. The included angle between the second plane and the first plane is greater than 0 degrees, so as to close the bottom of the rotor body body and reduce the assembly gap when the base plate assembly is assembled to the bottom of the rotor body body.

[0018] To facilitate positioning during the assembly of the base plate assembly 3, as another embodiment of this utility model, such as Figure 1 , Figure 4 and Figure 5 As shown, the circumference of the bottom of the rotor body 22 has a third plane 222 located outside the first plane 221. The third plane 222 and the first plane 221 form a step 223, the distance between which is greater than the distance between the first plane 221 and the top of the rotor body 22. The second plane 31 is received within the step 223.

[0019] Furthermore, the rotor body 22 has multiple accommodating cavities 224 for receiving test tubes. The accommodating cavities 224 are inclined at a certain angle relative to the rotor body's central axis 23 and are evenly distributed about the rotor body's central axis 23. The area between the accommodating cavities 224 is a non-stressed, non-functional area, which can be hollowed out to reduce weight. The area extending outward from the rotor body's central axis 23 to the accommodating cavities 224 is also a non-stressed, non-functional area, which can also be hollowed out to reduce weight (the accommodating cavities 224 need to retain a certain wall thickness). A first plane 221 is formed between the bottom of the accommodating cavity 224 and the bottom of two adjacent accommodating cavities 224. The radial length of the first plane 221 at the bottom of the accommodating cavity 224 is greater than the radial length of the first plane 221 between the bottoms of two adjacent accommodating cavities 224. During assembly, the larger first plane 221 at the bottom of the multiple accommodating cavities 224 evenly supports the base plate assembly 3, making the base plate assembly 3 less prone to tipping over.

[0020] In this embodiment of the invention, the base plate assembly 3 includes a base plate 32, a pressure block 33, and screws 34. The base plate 32 is made of the same or similar material as the rotor body 22, such as aluminum alloy or engineering plastic, so that it is nearly a single unit after assembly and has a certain elastic deformation capability. The second plane 31 is located on the circumference of the base plate 32. The center of both the base plate 32 and the pressure block 33 is a through hole, which corresponds to the central shaft 23 of the rotor body, so that the drive shaft of the centrifuge can pass through and connect to the central shaft 23 of the rotor body. The base plate 32 is pressed and locked to the central shaft 23 of the rotor body by the pressure block 33 and the screws 34, and surface contact is formed between the base plate 32 and the central shaft 23 of the rotor body, and between the pressure block 33 and the base plate 32. Preferably, the pressure block 33 is annular, and the size of its cross-section matches the size of the cross-section of the central shaft 23 of the rotor body. Through holes are evenly distributed on the annulus, and the screws 34 pass through the through holes and are locked to the central shaft 23 of the rotor body.

[0021] When assembling the base plate assembly 3, with the bottom of the rotor body 22 facing upwards, the base plate 32 is placed on the first plane 221 and initially positioned by the step 223. Then, the pressure block 33 is placed above the base plate 32, aligned with the central axis 23 of the rotor body, and finally locked in place with screws 34. At this time, the shape formed by the second plane 31 of the base plate 32 abutting against the first plane 221 of the rotor body 22 is a line circle.

[0022] Figure 6 This is a schematic diagram of the centrifuge provided in an embodiment of this utility model. Figure 6 As shown, the centrifuge includes a motor, a drive shaft, a centrifuge chamber, and the rotor described above. The drive shaft passes through the bottom of the centrifuge chamber, and the rotor is locked onto the drive shaft by a locking structure, so that the rotor is located inside the centrifuge chamber. The motor drives the drive shaft to rotate to perform the centrifugation operation.

[0023] In this embodiment of the utility model, the base plate assembly is locked to the rotor body central shaft at the center of the rotor body body. The second plane of the circumference of the base plate assembly abuts against the first plane of the bottom circumference of the rotor body body. The included angle between the second plane and the first plane is greater than 0 degrees, so as to close the bottom of the rotor body body and reduce the assembly gap when the base plate assembly is assembled to the bottom of the rotor body body.

[0024] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A rotor, characterized in that, Includes rotor body assembly (2) and base plate assembly (3); The rotor body assembly (2) includes a rotor body body (22) and a rotor body central shaft (23) disposed at the center of the rotor body body (22). The circumference of the bottom of the rotor body body (22) has a first plane (221). The circumference of the base plate assembly (3) has a second plane (31); The base plate assembly (3) is locked to the central shaft (23) of the rotor body, the second plane (31) abuts against the first plane (221), and the angle between the second plane (31) and the first plane (221) is greater than 0 degrees.

2. The rotor according to claim 1, characterized in that, The angle between the second plane (31) and the first plane (221) is toward the central axis (23) of the rotor body.

3. The rotor according to claim 1, characterized in that, When the base plate assembly (3) is locked to the rotor body central shaft (23), the angle between the second plane (31) and the first plane (221) is smaller than the angle between the second plane (31) and the first plane (221) when the base plate assembly (3) is not locked to the rotor body central shaft (23).

4. The rotor according to claim 1, characterized in that, When the base plate assembly (3) is locked to the central shaft (23) of the rotor body, the force between the second plane (31) and the first plane (221) is greater than or equal to a preset value.

5. The rotor according to any one of claims 1-4, characterized in that, The circumference of the bottom of the rotor body (22) has a step (223); The second plane (31) is received in the step (223) and abuts against the first plane (221).

6. The rotor according to claim 5, characterized in that, The bottom circumference of the rotor body (22) has a third plane (222), and the first plane (221) and the third plane (222) form the step (223).

7. The rotor according to any one of claims 1-4, characterized in that, The rotor body (22) has multiple accommodating cavities (224) for accommodating test tubes. The radial length of the first plane (221) at the bottom of the accommodating cavity (224) is greater than the radial length of the first plane (221) between the bottoms of the accommodating cavity (224).

8. The rotor according to any one of claims 1-4, characterized in that, The base plate assembly (3) includes a base plate (32), a pressure block (33), and screws (34); The second plane (31) is located on the circumference of the base plate (32), and the base plate (32) is locked to the central shaft (23) of the rotor body by the pressure block (33) and the screw (34).

9. The rotor according to claim 8, characterized in that, The base plate (32) is made of aluminum alloy or engineering plastic.

10. A centrifuge, characterized in that, The centrifuge includes a motor, a drive shaft, a centrifuge chamber, and a rotor as described in any one of claims 1-9; The drive shaft passes through the bottom of the centrifuge chamber, and the rotor is locked on the drive shaft so that the rotor is located inside the centrifuge chamber. The motor drives the drive shaft to rotate to perform the centrifugation operation.

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