Energy-saving centrifugal machine

Abstract

The invention relates to the field of centrifugal equipment, and discloses an energy-saving centrifugal machine which comprises a barrel, a rotating shaft penetrating through the center of the barrel and a motor used for driving the rotating shaft. The output end of the motor is fixedly connected with the rotating shaft, a bearing is fixedly arranged between the rotating shaft and the center of the barrel and comprises an outer ring and an inner ring fixedly connected with the rotating shaft, the bearing and the outer ring can move relatively, and the top of the rotating shaft is sleeved with a rotating disc used for fixing a centrifugal tube. The rotating disc, the rotating shaft and the output end of the motor belong to the same axis so as to realize coaxial transmission; a supporting seat is arranged on the outer ring of the bearing in the barrel in a sleeving manner, the bottom of the supporting seat is fixedly connected with the bottom of the barrel, a rotating body is arranged at the top of the supporting seat, and the rotating body protrudes out of the top surface of the supporting seat and is in contact with the bottom surface of the rotating disc; according to the scheme, the technical problem that an existing energy-saving centrifugal machine is high in use cost can be solved.

Description

Technical Field

[0001] The invention relates to the field of centrifugal equipment, in particular to an energy-saving centrifuge. Background Art

[0002] In the medical field, centrifuges are an indispensable device, widely used in many scenarios such as blood separation, biological sample separation, clinical testing, vaccine preparation, genomic research, proteomics research, etc. However, existing medical centrifuges have problems of high energy consumption and low efficiency during operation, which not only increases medical costs, but also poses challenges to the sustainable use of energy.

[0003] For example, in the process of blood separation, traditional centrifuges often consume a lot of electricity due to the limitations of their drive system and control method. Specifically, the core structure of the traditional centrifuge is driven by an AC induction motor, but the efficiency of the AC induction motor may drop to less than 70% at partial load. At the same time, the eddy current loss of the AC induction motor during the start-stop process accounts for 15-20% of the total energy consumption. The prior art has proposed the use of magnetic bearings to achieve contactless support to eliminate the impact of load, or to reduce the startup energy consumption by 10-15% by calculating the optimal acceleration curve in advance. However, the cost of implementing such solutions is relatively high. In addition, after long-term operation, the energy consumption of the existing centrifuge will further increase due to the wear and aging of mechanical parts, especially the meshing transmission gears and other transmission parts, while the efficiency will continue to decline, which forces medical institutions to frequently maintain and update the equipment, increasing maintenance costs. The modern medical environment is complex and changeable, and emergency rescue missions or physical examinations are often required. When working outdoors, centrifuges are also important equipment that needs to be carried with you. However, due to the poor medical conditions outdoors, it is impossible to ensure that the placement surface of the centrifuge is regular and flat, which will cause the centrifuge to tilt as a whole or shift its center of gravity. During operation, the rotor of the motor, that is, the rotating part, may not be able to maintain an ideal horizontal state, and additional centrifugal force will be generated, resulting in uneven distribution. In order to maintain stable rotation and achieve the set centrifugal effect, the motor needs to output greater torque and power to overcome this imbalance, resulting in increased energy consumption.

[0004] In summary, there is an urgent need for an energy-saving centrifuge with lower use cost and applicable to multiple scenarios. Summary of the invention

[0005] The present invention aims to provide an energy-saving centrifuge to solve the technical problem of high use cost of existing energy-saving centrifuges.

[0006] In order to achieve the above object, the present invention adopts the following technical scheme:

[0007] An energy-saving centrifuge comprises a cylinder, a rotating shaft passing through the center of the cylinder, and a motor for driving the rotating shaft; the output end of the motor is fixedly connected to the rotating shaft, a bearing is fixedly arranged between the rotating shaft and the center of the cylinder, the bearing comprises an outer ring and an inner ring fixedly connected to the rotating shaft, the bearing and the outer ring can move relative to each other, a turntable for fixing a centrifuge tube is sleeved on the top of the rotating shaft, the turntable, the rotating shaft, and the output end of the motor belong to the same axis to realize coaxial transmission; a support seat is sleeved on the outer ring of the bearing in the cylinder, the bottom of the support seat is fixedly connected to the bottom of the cylinder, a rotating body is arranged on the top of the support seat, the rotating body protrudes from the top surface of the support seat and contacts with the bottom surface of the turntable.

[0008] Beneficial effects:

[0009] 1. Reduce energy consumption by optimizing load distribution: In this solution, the load of the turntable is mainly borne by the support seat and the cylinder, rather than directly acting on the shaft and the motor. This design significantly reduces the load on the motor and the shaft, so that the motor does not need to output too much torque and power to maintain rotation, thereby effectively reducing energy consumption. As the burden on the motor is reduced, its operating efficiency is improved. Especially under partial load conditions, the motor can maintain a high working efficiency, avoiding the problem of traditional AC induction motors with reduced efficiency at low loads. This not only saves electricity, but also extends the service life of the equipment. By transferring the load of the turntable to the support seat and the cylinder, the problem of uneven distribution caused by equipment tilt or center of gravity shift can be effectively prevented. The motor does not need to output additional torque to overcome these unbalanced forces, reducing eddy current losses during startup and operation, and further reducing energy consumption.

[0010] 2. By eliminating the redundant transmission components in traditional centrifuges, there is no need to frequently maintain and update the equipment: the turntable, rotating shaft and the output end of the motor belong to the same axis, realizing coaxial integrated transmission. This design eliminates the redundant transmission components commonly found in traditional centrifuges (such as meshing gears, etc.) and simplifies the structure of the transmission system. The simplified system not only improves the transmission efficiency, but also reduces the problem of increased energy consumption caused by mechanical wear and aging. At the same time, due to the elimination of complex transmission components, the maintenance requirements of the equipment are greatly reduced. There is no need to frequently replace worn gears or other transmission components, which reduces the maintenance cost and downtime of the equipment and improves the reliability and availability of the equipment.

[0011] 3. The support seat also has the function of fixing the bearing and weakening the impact of bearing vibration: the support seat not only bears the main load of the turntable, but also has the function of fixing the bearing. By tightly combining the outer ring of the bearing with the support seat, the stability of the bearing during operation is ensured, vibration problems caused by loosening or displacement of the bearing are prevented, the stability of the entire system is improved, and the stability of the centrifuge during operation is ensured.

[0012] In summary, this solution not only reduces the cost of using the equipment, but also improves the applicability and reliability of the equipment in various application scenarios. It is particularly suitable for the complex and changeable task requirements in modern medical environments.

[0013] Preferably, as an improvement, a bracket is arranged around the periphery of the bottom of the cylinder, and the bracket raises the cylinder so that the bottom of the motor is in a suspended state.

[0014] Beneficial effects: By raising the cylinder and placing the bottom of the motor in a suspended state, the space for air circulation is increased, effectively improving the heat dissipation conditions of the motor and the entire equipment. A good ventilation environment can quickly take away the heat generated by the motor, prevent the motor from overheating, and ensure that it can still maintain an efficient working state during long-term high-load operation, reducing the failure rate and maintenance cost of the equipment. The design of the bracket makes the overall structure of the cylinder more stable and optimizes the distribution of the center of gravity of the equipment. Even when used in complex outdoor environments, such as inserting it into a soil environment to prevent the equipment from tipping over, the operating stability and safety of the equipment are further enhanced. At the same time, when the motor and other bottom components need to be replaced or repaired, the suspended design allows for a larger operating space, allowing caregivers to more easily access related components, reducing maintenance time and difficulty.

[0015] Preferably, as an improvement, an enclosure is fixedly provided in the cylinder, the enclosure wraps the turntable and the support seat, and an inner cover is detachably fixedly provided on the top of the enclosure, the inner cover is used to close the opening on the top of the enclosure.

[0016] Beneficial effects: The cylinder is used as the outer protection structure, and the enclosure is used as the inner protection structure, forming a double protection mechanism. This design significantly improves the overall protection performance of the equipment, and can effectively prevent external foreign matter (such as dust, liquid or other impurities) from entering the cylinder, and prevent these foreign matter from contaminating or damaging key components such as the turntable, support seat and motor. Especially in outdoor or medical environments with poor conditions, keeping the interior of the equipment clean and sterile is crucial to ensure the accuracy and safety of the separation process.

[0017] Preferably, as an improvement, a housing for covering the motor is detachably fixedly arranged at the bottom of the cylinder.

[0018] Beneficial effects: The housing can effectively prevent dust, liquids and other impurities from entering the motor area, preventing these pollutants from damaging the motor or affecting its normal operation. Especially in medical environments, keeping the motor clean and sterile is essential to ensure the reliability and service life of the equipment. The housing adopts a detachable fixed design, which makes it easy for nursing staff to install and remove it.

[0019] Preferably, as an improvement, a silicone gasket is sandwiched between the support seat and the outer ring of the bearing.

[0020] Beneficial effects: The silicone gasket has good elasticity and vibration absorption characteristics, and can effectively absorb and buffer the vibration between the support seat and the outer ring of the bearing. During high-speed rotation, the vibration generated by the centrifuge will be partially absorbed by the silicone gasket, reducing the amount of vibration transmitted to the entire equipment, thereby reducing noise and mechanical wear. At the same time, the silicone gasket can provide uniform pressure distribution between the support seat and the outer ring of the bearing, ensuring a closer and smoother contact between the two, helping to maintain the concentricity of the shaft and the turntable, and ensuring the relative position stability between the support seat and the outer ring of the bearing, thereby maintaining long-term reliable operation of the equipment.

[0021] Preferably, as an improvement, the rotating body is a steel ball, and the steel ball is embedded in the top of the support seat.

[0022] Beneficial effects: The steel ball is embedded in the top of the support seat as a rotating body, which can provide extremely low friction resistance between the bottom surface of the turntable and the support seat, ensuring that the turntable remains stable during high-speed rotation. Compared with other materials, the steel ball has higher hardness and wear resistance, and can maintain a low friction coefficient during long-term use, improving the rotation accuracy and efficiency. At the same time, the steel ball can evenly distribute the pressure on the contact surface, avoiding the eccentricity problem caused by uneven local force. This design ensures that the turntable will not be unbalanced during rotation, further improving the accuracy and consistency of the separation effect.

[0023] Preferably, as an improvement, the rotating disk includes an integrally formed fixed disk and a chassis, the fixed disk is an annular structure, a step is arranged between the outer ring of the fixed disk and the chassis, and the inner ring of the fixed disk is inclined downward, so that when the centrifuge tube is fixed to the rotating disk, the tail of the centrifuge tube faces the end away from the rotating shaft, and the centrifuge tube is placed at an angle as a whole.

[0024] Beneficial effects: The inner circle of the fixed disk is inclined downward, so that when the centrifuge tube is fixed to the rotating disk, the centrifuge tube is placed at an angle as a whole. This design allows the sample in the centrifuge tube to be better stratified during high-speed rotation, especially when dealing with multiphase liquids such as blood, the inclined placement helps to improve the separation efficiency and separation quality. Due to the effects of gravity and centrifugal force, the different components in the sample are more likely to be stratified along the tube wall, reducing the mixing area and improving the separation accuracy. The tail of the centrifuge tube is facing the end away from the rotating shaft and has no contact with the bottom plate, which can effectively avoid damage or leakage caused by friction or collision at the tail of the centrifuge tube and prevent sample contamination.

[0025] Preferably, as an improvement, the cylinder body includes an outer cylinder and an inner cylinder, a deflection connecting piece is arranged between the outer cylinder and the inner cylinder, and the motor, bearing and support seat are assembled on the inner cylinder; it also includes an automatic balancing weight device fixedly arranged at the bottom of the motor, and the automatic balancing weight device includes a balancing weight block, an angle sensor and a controller; according to the angle change of the outer cylinder detected by the angle sensor, the controller automatically adjusts the position of the balancing weight block to offset the unbalanced force caused by uneven placement, ensuring that the rotating parts including the motor, bearing and support seat always remain vertically downward.

[0026] Beneficial effects: This design can offset the unbalanced force caused by uneven placement in real time, ensuring that the rotating parts including the motor, bearings, and support seats always remain vertically downward. Especially in complex outdoor environments, when the placement surface of the centrifuge is not flat enough, the automatic counterweight device can effectively prevent the equipment from tilting or shifting the center of gravity, ensuring that the equipment remains stable during high-speed rotation. The automatic counterweight device can ensure that the centrifuge can maintain an ideal horizontal state under any circumstances, avoiding vibration and eccentricity problems caused by imbalance. This stable rotation state helps to improve the accuracy and efficiency of the separation process, especially when dealing with high-precision blood separation or other biological sample separation tasks, more accurate and consistent separation results can be obtained. At the same time, reducing the impact of vibration and unbalanced forces on the equipment not only improves the separation effect, but also extends the service life of key components of the equipment (such as motors, bearings, etc.). In the long run, this reduces the maintenance frequency and cost of the equipment and improves the overall reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a front view of a first embodiment of an energy-saving centrifuge of the present invention;

[0028] Figure 2 for Figure 2 Axonometric view of (hiding outer cover 500);

[0029] Figure 3 for Figure 1 A top view of (hiding the outer cover 500);

[0030] Figure 4 for Figure 3 AA cross-sectional view (hide the centrifuge tube 800);

[0031] Figure 5 for Figure 4 A magnified schematic diagram of position B in the middle;

[0032] Figure 6 The energy-saving centrifuge embodiment 2 of the present invention corresponds to Figure 4 sectional view (hiding the bracket 102 and the housing 600);

[0033] Figure 7 for Figure 6 A magnified schematic diagram of the middle C position;

[0034] Figure 8 The three corresponding embodiments of the present invention are Figure 7 An enlarged schematic diagram of . DETAILED DESCRIPTION

[0035] The following is further described in detail through specific implementation methods:

[0036] The figure marks in the drawings of the specification include: cylinder 100, enclosure 101, bracket 102, outer cylinder 103, inner cylinder 104, hinge seat 105, hinge block 106, deflection sphere 107, locking piece 108, micro switch 109, rotating shaft 200, motor 300, turntable 400, fixed plate 401, chassis 402, outer cover 500, outer shell 600, bearing 700, outer ring 701, inner ring 702, centrifuge tube 800, support seat 900, steel ball 901, silicone gasket 902, automatic balancing device 1000, balancing weight box 1001, offset platform 1002, balancing weight block 1003.

[0037] Embodiment 1

[0038] An energy-saving centrifuge, combined with Figure 1-Figure 5 As shown, it includes a hollow cylinder 100, a rotating shaft 200 passing through the center of the cylinder 100, a motor 300 for driving the rotating shaft 200, a turntable 400 for fixing a centrifuge tube 800, an outer cover 500 for closing the top opening of the cylinder 100, and a housing 600 for protecting the motor 300.

[0039] The motor 300 is a brushless DC motor 300, which is fixed to the bottom of the cylinder 100 by screws, and the output end of the motor 300 is fixedly connected to the rotating shaft 200. A bearing 700 is fixedly arranged between the rotating shaft 200 and the center of the cylinder 100, and the bearing 700 is a deep groove ball bearing 700. The bearing 700 includes an outer ring 701 fixed to the cylinder 100 by screws, and an inner ring 702 fixedly connected to the rotating shaft 200 by interference fit, and the bearing 700 and the outer ring 701 can rotate relative to each other. A turntable 400 for fixing the centrifuge tube 800 is sleeved on the top of the rotating shaft 200. The turntable 400 includes an integrally formed fixed disk 401 and a bottom plate 402. The fixed disk 401 is annular in structure. A step is provided between the outer ring 701 of the fixed disk 401 and the bottom plate 402, i.e., the diameter of the bottom plate 402 is smaller than the diameter of the fixed disk 401, so as to reserve a part of space for suspending the tail of the centrifuge tube 800. The inner ring 702 of the fixed disk 401 is inclined downward, so that when the centrifuge tube 800 is fixed to the rotating disk, the tail of the centrifuge tube 800 faces the end away from the rotating shaft 200 and does not contact the bottom plate 402. The centrifuge tube 800 is placed tilted as a whole. It is worth mentioning that the tail of the centrifuge tube 800. The turntable 400, the rotating shaft, and the output end of the motor 300 belong to the same axis to realize coaxial transmission, eliminating the redundant transmission components in the traditional centrifuge.

[0040] In the cylinder 100, a support seat 900 is sleeved on the outer ring 701 of the bearing 700. The support seat 900 is an annular structure. The bottom of the support seat 900 is welded and fixed to the bottom of the cylinder 100. A rotating body is arranged on the top of the support seat 900. The rotating body protrudes from the top surface of the support seat 900 and contacts the bottom surface of the turntable 400. A groove is provided on the top surface of the support seat 900. In this embodiment, the rotating body is a plurality of steel balls 901 with smooth surfaces embedded in the groove. The rotating body not only supports the turntable 400 but also assists the turntable 400 in rotating. In this way, the load of the turntable 400 is mainly concentrated on the support seat 900 and the cylinder 100. It is worth mentioning that a silicone gasket 902 is sandwiched between the support seat 900 and the outer ring 701 of the bearing 700, so that the outer ring 701 of the bearing 700 and the support seat 900 fit more closely, and at the same time helps to reduce the vibration effect of the high-speed rotation process of the motor 300 on the cylinder 100.

[0041] An enclosure 101 is integrally formed in the cylinder 100, and the enclosure 101 wraps the turntable 400 and the support seat 900. An inner cover is detachably fixedly provided on the top of the enclosure 101. Specifically, the inner cover can be buckled on the top opening of the enclosure 101 to close the turntable 400. The inner cover is not shown in the drawings.

[0042] A triangular bracket 102 is fixedly arranged around the bottom periphery of the cylinder 100, and the triangular bracket 102 is tilted and opened toward the periphery, and the bracket 102 raises the cylinder 100 so that the bottom of the motor 300 is suspended. A housing 600 for covering the motor 300 is detachably fixedly arranged at the bottom of the cylinder 100, and is specifically realized by inserting screws between the top of the housing 600 and the bottom of the cylinder 100.

[0043] Embodiment 2

[0044] Compared with the first embodiment, this embodiment Figure 6 and Figure 7 As shown, the difference is that the cylinder 100 includes an outer cylinder 103 and an inner cylinder 104, a deflection connection member is arranged between the outer cylinder 103 and the inner cylinder 104, and the motor 300, the bearing 700, and the support seat 900 are fixedly assembled on the inner cylinder 104. Specifically, the deflection connection member includes a C-shaped hinge seat 105 fixedly connected to the outer cylinder 103, a set of hinge blocks 106 opposite to each other are fixedly arranged in the hinge seat 105, a deflection ball 107 is sandwiched between the two hinge blocks 106, and the deflection ball 107 is fixedly connected to the inner cylinder 104.

[0045] In this embodiment, an automatic weight balancing device 1000 is also included, and the automatic weight balancing device 1000 includes a weight balancing box 1001, an offset platform 1002 fixedly arranged inside the weight balancing box 1001, a weight block 1003 that can move autonomously on the offset platform 1002, and an angle sensor and a controller fixedly arranged at the bottom of the outer cylinder 103, and the controller is electrically connected to the angle sensor and the offset platform 1002 respectively. After the automatic weight balancing device 1000 is equipped, the controller automatically adjusts the position of the weight block 1003 according to the imbalance of the outer cylinder 103 detected by the angle sensor, that is, the tilt angle relative to the horizontal plane, so as to offset the unbalanced force caused by the uneven placement of the centrifuge, and ensure that the rotating parts including the motor 300, the bearing 700, and the support seat 900 are always facing the direction perpendicular to the horizontal plane, so as to deal with the problem of increased energy consumption caused by the uneven placement surface of the centrifuge in a complex outdoor environment.

[0046] Embodiment 3

[0047] Compared with the second embodiment, this embodiment combines Figure 8As shown, the difference is that a locking piece 108 is provided at the bottom of the hinge seat 105, and the locking piece 108 is threadedly connected to the bottom panel of the hinge seat 105, and the top of the locking piece 108 is close to the deflection ball 107. When the locking piece 108 is pressed against the deflection ball 107, the inner cylinder 104 and the rotating part can no longer deviate, thereby ensuring the smooth progress of the centrifugal process. In other embodiments, the purpose can also be achieved by closing the movement of the counterweight 1003 by the offset platform 1002 through program control. Further, a micro switch 109 electrically connected to the motor 300 is also fixedly provided at the bottom of the hinge seat 105, and the position corresponding to the micro switch 109 on the locking piece 108 is hollowed out. When the locking piece 108 is pressed against the deflection ball 107, the tail of the locking piece 108 will touch the micro switch 109, thereby starting the motor 300 at the same time to drive the rotating shaft 200 and the turntable 400 to rotate at high speed for centrifugation.

[0048] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An energy-saving centrifuge, characterized in that: It includes a cylinder, a rotating shaft passing through the center of the cylinder, and a motor for driving the rotating shaft; the output end of the motor is fixedly connected to the rotating shaft, a bearing is fixedly arranged between the rotating shaft and the center of the cylinder, the bearing includes an outer ring and an inner ring fixedly connected to the rotating shaft, the bearing and the outer ring can move relative to each other, a turntable for fixing the centrifuge tube is sleeved on the top of the rotating shaft, the turntable, the rotating shaft, and the output end of the motor belong to the same axis to realize coaxial transmission; a support seat is sleeved on the outer ring of the bearing in the cylinder, the bottom of the support seat is fixedly connected to the bottom of the cylinder, a rotating body is arranged on the top of the support seat, the rotating body protrudes from the top surface of the support seat and contacts with the bottom surface of the turntable.

2. An energy-saving centrifuge according to claim 1, characterized in that: A bracket is arranged around the periphery of the bottom of the cylinder, and the bracket raises the cylinder so that the bottom of the motor is in a suspended state.

3. An energy-saving centrifuge according to claim 2, characterized in that: An enclosure is fixedly arranged in the cylinder, and the enclosure wraps the turntable and the support seat. An inner cover is detachably fixedly arranged on the top of the enclosure, and the inner cover is used to close the opening on the top of the enclosure.

4. An energy-saving centrifuge according to claim 3, characterized in that: A shell for covering the motor is detachably fixedly arranged at the bottom of the cylinder.

5. An energy-saving centrifuge according to claim 4, characterized in that: A silicone gasket is sandwiched between the support seat and the outer ring of the bearing.

6. An energy-saving centrifuge according to claim 5, characterized in that: The rotating body is a steel ball, which is embedded in the top of the supporting seat.

7. An energy-saving centrifuge according to claim 6, characterized in that: The rotating disk includes an integrally formed fixed disk and a bottom plate. The fixed disk is an annular structure. A step is arranged between the outer ring of the fixed disk and the bottom plate. The inner ring of the fixed disk is inclined downward, so that when the centrifuge tube is fixed to the rotating disk, the tail of the centrifuge tube faces the end away from the rotating shaft, and the centrifuge tube is placed at an angle as a whole.

8. An energy-saving centrifuge according to claim 7, characterized in that: The cylinder body includes an outer cylinder and an inner cylinder, a deflection connecting piece is arranged between the outer cylinder and the inner cylinder, and the motor, bearing and support seat are assembled on the inner cylinder; it also includes an automatic balancing weight device fixedly arranged at the bottom of the motor, and the automatic balancing weight device includes a balancing weight block, an angle sensor and a controller; according to the angle change of the outer cylinder detected by the angle sensor, the controller automatically adjusts the position of the balancing weight block to offset the unbalanced force caused by uneven placement, so as to ensure that the rotating parts including the motor, bearing and support seat always remain vertically downward.

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