High-speed centrifuge rotor unbalance detection device

Abstract

The utility model provides a high-speed centrifuge rotor unbalance detection device, which comprises a driving motor for driving a centrifuge to rotate and a mounting bracket of the motor, a motor stabilizing mechanism is arranged outside the driving motor, and a rotor for placing an adapter is arranged on an output shaft at the upper end of the driving motor. A recognizer for detecting the shaking amplitude of the motor is arranged on the motor stabilizing mechanism, and the recognizer can be a six-axis spiral instrument and is sensitive in detection. The device can detect the small unbalance of the rotor so as to timely control the rotating speed of the motor, is safer, and prolongs the service life of the centrifugal machine.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifuges, in particular to a high-speed centrifuge rotor imbalance detection device. Background Art

[0002] A centrifuge is a machine that uses centrifugal force to separate components in a liquid and solid particles or a mixture of liquid and liquid. The initial imbalance of the centrifuge during operation will be magnified by dozens, hundreds, or even thousands of times due to the high speed. If the sample is not balanced during operation, the force on the shaft of the centrifuge will be magnified, causing the centrifuge to shake and the motor to be damaged, or even the basket to fly out, causing damage to the centrifuge or even casualties.

[0003] To solve this problem, most manufacturers use proximity switches or Hall sensors. When the motor vibrates greatly, the proximity switch can identify it and reduce the speed. However, the proximity switch is relatively sensitive and easily triggered by mistake. Therefore, in order to prevent false triggering, most centrifuges will reduce the sensitivity and set a relatively large imbalance to be identified, which will cause more obvious vibration and affect the life of the motor shaft. Summary of the invention

[0004] In order to solve the above problems of the prior art, the utility model provides a high-speed centrifuge rotor imbalance detection device, which can detect a smaller imbalance, can decelerate the motor in time according to the detection result, and can reduce damage to the instrument.

[0005] The technical solutions adopted are as follows:

[0006] A high-speed centrifuge rotor imbalance detection device comprises a drive motor for driving the centrifuge to rotate and a mounting bracket of the motor, the drive motor is provided with a motor stabilizing mechanism outside, a rotor for placing an adapter is provided on the output shaft at the upper end of the drive motor, and an identifier for detecting the motor shaking amplitude is provided on the motor stabilizing mechanism.

[0007] Furthermore, the motor stabilizing mechanism comprises a motor stabilizing block disposed above the mounting bracket, and a plurality of shock absorbing columns are disposed between the motor stabilizing block and the mounting bracket.

[0008] Furthermore, the shock absorbing column may be a rubber shock absorbing column.

[0009] Furthermore, the identifier is a six-axis gyroscope or a three-axis acceleration sensor.

[0010] Furthermore, a plurality of adapters are correspondingly arranged around the rotor.

[0011] Furthermore, a rotating basket for placing the adapter is provided on the rotor.

[0012] Furthermore, there are a plurality of rotating baskets distributed around the rotor.

[0013] Compared with the prior art, the beneficial effects produced by the utility model are:

[0014] The utility model provides a high-speed centrifuge rotor imbalance detection device, including a drive motor for driving the rotor to rotate, the drive motor is installed on a mounting bracket, and a motor stabilization mechanism is provided outside the drive motor, which shakes with the shaking of the motor. The motor stabilization mechanism is provided with an identifier that can detect the motor shaking amplitude, and the identifier can be a hexagonal spiral meter. The vibration amplitude of the centrifuge motor rotor is determined by the hexagonal spiral meter, and the six-axis spiral meter can identify smaller imbalances. According to the detection results, the motor speed can be controlled to slow down in time to protect the motor shaft and extend the service life of the centrifuge. A number of shock-absorbing columns are provided between the motor stabilization block and the mounting bracket for buffering and shock absorption, further reducing vibration and protecting the instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a side view of the utility model;

[0017] Among them, there are a driving motor 1, a mounting bracket 2, a motor stabilizing mechanism 3, a motor stabilizing block 301, a shock absorbing column 302, an adapter 4, a rotor 5, an identifier 6, and a rotating basket 7. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with specific embodiments.

[0019] refer to Figure 1 , 2 A high-speed centrifuge rotor imbalance detection device includes a drive motor 1 for driving the centrifuge to rotate and a motor mounting bracket 2. The drive motor 1 is provided with a motor stabilizing mechanism 3. A rotor 5 for placing an adapter 4 is provided on the output shaft at the upper end of the drive motor 1. The motor stabilizing mechanism 3 is provided with an identifier 6 for detecting the motor shaking amplitude.

[0020] The motor stabilizing mechanism 3 comprises a motor stabilizing block 301 disposed above the mounting bracket, and a plurality of shock absorbing columns 302 are disposed between the motor stabilizing block 301 and the mounting bracket 2. The shock absorbing columns 302 play a role in buffering and shock absorption.

[0021] The motor stabilizing block 301 is arranged outside the driving motor 1 and is connected to the driving motor 1 . When the driving motor shakes, the motor stabilizing block 301 will shake accordingly and be detected by the identifier 6 .

[0022] The data from the six-axis gyroscope indirectly reflects the change in the motor's angle and detects the change in the motor's position angle, thereby effectively identifying the motor's shaking amplitude and quantifying the imbalance on the rotor.

[0023] The rotor 5 is provided with a rotating basket 7 for placing the adapter 4. The rotating basket 7 is provided in a plurality and distributed around the rotor 5. Preferably, the utility model provides four rotating baskets 7, each of which is provided with an adapter 4. The rotor can be equipped with multiple sets of adapters 4 of different sizes to facilitate the separation and use of centrifuge tubes of different capacities. Since the weight of the centrifuged samples may be different, the force on the entire rotor is unbalanced.

[0024] The identifier 6 is a six-axis gyroscope or a three-axis acceleration sensor. In this embodiment, the six-axis gyroscope 6 can detect an imbalance of 5g to 20g, can detect a smaller imbalance, and can more sensitively detect the eccentric state of the centrifuge, so that the centrifuge can be stopped in time, reducing damage to the centrifuge caused by shaking.

[0025] This solution adopts an identifier 6 installed on the motor stabilizing block. Since the greater the imbalance on the rotor 5, the greater the deformation of the shock-absorbing column 302 under the action of the centrifugal force, the greater the amplitude of the rotor 5, and as the speed increases, the centrifugal force will gradually increase, the force on the motor main shaft will increase, and the deformation of the shock-absorbing column 302 will also increase accordingly. A larger deformation will reduce the service life of the shock-absorbing column 302.

[0026] At this time, the vibration amplitude of the rotor can be quantified by detecting the change in the motor position angle, thereby determining the imbalance of the sample loaded on the rotor. By defining the maximum allowable imbalance, that is, defining the maximum amplitude allowed by the rotor, the centrifugal force on the motor spindle is limited. That is, when the six-axis gyroscope exceeds the allowable angle change, the motor begins to slow down, avoiding further speed increase and reducing the damage to the motor shaft caused by the gradually increasing centrifugal force.

[0027] The utility model utilizes a six-axis gyroscope to determine the posture of the centrifuge rotor and ensures the running stability of the centrifuge by reducing the maximum allowable unbalance amount of the centrifuge.

[0028] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A high-speed centrifuge rotor imbalance detection device, comprising a drive motor (1) for driving the centrifuge to rotate and a motor mounting bracket (2), the drive motor (1) being provided with a motor stabilizing mechanism (3) outside, and a rotor (5) for placing an adapter (4) being provided on an output shaft at the upper end of the drive motor (1), characterized in that: The motor stabilizing mechanism (3) is provided with an identifier (6) for detecting the motor shaking amplitude.

2. The high-speed centrifuge rotor imbalance detection device according to claim 1, characterized in that: The motor stabilizing mechanism (3) comprises a motor stabilizing block (301) arranged above the mounting bracket, and a plurality of shock absorbing columns (302) are arranged between the motor stabilizing block (301) and the mounting bracket (2).

3. The high-speed centrifuge rotor imbalance detection device according to claim 2, characterized in that: The shock absorbing column (302) may be a rubber shock absorbing column.

4. The high-speed centrifuge rotor imbalance detection device according to claim 1, characterized in that: The identifier (6) is a six-axis gyroscope or a three-axis acceleration sensor.

5. The high-speed centrifuge rotor imbalance detection device according to claim 1, characterized in that: A plurality of adapters (4) are correspondingly arranged around the rotor.

6. The high-speed centrifuge rotor imbalance detection device according to claim 1, characterized in that: The rotor (5) is provided with a rotating basket (7) for placing the adapter (4).

7. The high-speed centrifuge rotor imbalance detection device according to claim 6, characterized in that: The rotating baskets (7) are provided in a plurality and are distributed around the rotor (5).

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