Balancing device of centrifugal machine

Abstract

The invention belongs to the technical field of centrifugal machines, and particularly relates to a balancing device of a centrifugal machine, which comprises an annular frame, a rotating arm box body, a data acquisition module and a balancing adjusting mechanism, and is characterized in that the annular frame is used for being connected with a main shaft of the centrifugal machine; the right end of the rotating arm box body is rotationally assembled on the annular frame; the data acquisition module comprises pressure sensor assemblies located between the outer side of the top of the rotating arm box body and the inner side of the top of the annular frame and between the outer side of the bottom of the rotating arm box body and the inner side of the bottom of the annular frame. Each pressure sensor assembly comprises pressure sensors arranged on the left side and the right side of the central axis respectively. The balancing adjusting mechanism comprises a movable balance weight and a driving component, wherein the movable balance weight is assembled on the rotating arm box in a sliding mode in the left-right direction, the driving component drives the movable balance weight to move, and the driving component responds to the numerical value of the pressure sensor to drive the movable balance weight to move so as to conduct balancing.

Description

Technical Field

[0001] The invention belongs to the technical field of centrifuges, and in particular relates to a balancing device for a centrifuge. Background Art

[0002] Centrifuges play an important role in determining the performance of components, equipment and electrical and electronic products under specific environments, and the arm centrifuge is a widely used type of centrifuge. The arm centrifuge usually includes a motor, a main shaft and an arm on the main shaft. The motor drives the arm to rotate at a high speed through the main shaft, so that the object to be tested placed on the test bench at the end of the arm generates centrifugal force.

[0003] In order to ensure that the arm centrifuge remains balanced during operation, a balancing device is usually set up to balance the unbalanced force. At present, most domestic centrifuges are balanced by static balancing. For example, an unequal length arm design is adopted. The tension belt is made into a screw at the short arm end. A matching pulley is installed on the screw. The counterweight mass block is installed on the pulley. The motor drives the pulley to rotate, and the pulley drives the counterweight mass block to move to achieve balancing. Alternatively, the counterweight mass block is directly mounted on the screw, and the counterweight mass block is driven to move when the screw rotates. Alternatively, a screw nut mechanism is installed in the middle part of the arm to drive the balancing mass block to move.

[0004] Regardless of the form, the current method is to perform leveling before the centrifuge starts working, that is, static balance adjustment, which cannot cope with changes in the balance state caused by problems such as model collapse or structural damage during the test. Summary of the invention

[0005] The invention provides a centrifuge balancing device to solve the technical problem that the balance adjustment method in the prior art cannot cope with the balance state change occurring during the test process.

[0006] In order to solve the above problems, the centrifuge balancing device provided by the present invention adopts the following technical solution: a centrifuge balancing device, comprising: The annular frame is used to be connected to the main shaft of the centrifuge so that the main shaft drives the annular frame to rotate around a central axis extending up and down; A swivel arm box body, the right end of which penetrates into the annular frame, and the right end of the swivel arm box body is rotatably mounted on the annular frame around an axis extending forward and backward; A data acquisition module, comprising a pressure sensor assembly located between the outer side of the top of the swivel arm box and the inner side of the top of the annular frame and between the outer side of the bottom of the swivel arm box and the inner side of the bottom of the annular frame, each of the pressure sensor assemblies comprising pressure sensors disposed on the left and right sides of the central axis; The balancing adjustment mechanism is arranged on the swing arm housing, and includes a movable counterweight slidably mounted on the swing arm housing along the left and right directions and a driving component driving the movable counterweight to move. The driving component drives the movable counterweight to move for balancing in response to the value of the pressure sensor.

[0007] The beneficial effect is: during the test, when the model collapses or the structure is damaged, the unbalanced force will cause the arm box to swing up and down. After the swing, the distance between the outer side of the top of the right end of the arm box and the inner side of the top of the annular frame, and the distance between the outer side of the bottom of the right end of the arm box and the inner side of the bottom of the annular frame change, and the pressure on the pressure sensor located therein changes, thereby causing a change in value. The driving component can drive the movable counterweight to move left and right according to the change in the value of the pressure sensor until the arm box swings back to its original state. The centrifuge balancing device of the present invention can monitor the balance state of the centrifuge in real time during the test, and adjust the counterweight accordingly, so as to deal with the situation of destroying the balance of the centrifuge such as model collapse or structural damage during the test.

[0008] Furthermore, each of the pressure sensor assemblies includes four pressure sensors, which are divided into two groups located on the left and right sides of the central axis, and the two pressure sensors in each group are located on the front and rear sides of the central axis. By increasing the number of pressure sensors, the accuracy of detection can be further improved.

[0009] Furthermore, sensor supports are fixed on both left and right sides of the annular frame, and the pressure sensor is arranged on the sensor supports.

[0010] Furthermore, the swing arm box body has a chamber, and the balancing adjustment mechanism is arranged at a left position in the chamber.

[0011] Furthermore, the swivel arm box body includes a swivel arm bottom plate that encloses and forms the chamber, two swivel arm side plates that are spaced apart from each other in the front and rear, two swivel arm end plates that are spaced apart from each other in the left and right, and a swivel arm cover plate; The swing arm side plate is a double-layer structure, including an outer plate, an inner plate and a reinforcing plate located between the outer plate and the inner plate. The swing arm side plate is a double-layer structure, which not only improves the strength of the swing arm side plate and the swing arm box, but also reduces the weight.

[0012] Furthermore, the tumbler housing further comprises a mounting assembly located in the chamber, the balancing adjustment mechanism is arranged on the mounting assembly, and the mounting assembly comprises a transverse partition plate arranged above the tumbler bottom plate in the air, a vertical partition plate fixedly arranged below the transverse partition plate, and a screw seat fixing plate fixedly arranged above the transverse partition plate; The movable counterweight is located above the transverse partition, and the driving component includes a screw seat fixed on the screw seat fixing plate, and a screw rotatably mounted on the screw seat. The screw runs through the movable counterweight and drives the movable counterweight to move left and right when rotating. The movable counterweight is driven to move back and forth by rotating the screw, achieving precise adjustment of ±0.1mm level; and after the transverse partition is set, the chamber can be divided into upper and lower layers, with the mechanical mechanism installed on the upper layer and the wiring harness installed on the lower layer, achieving physical isolation, avoiding interference and facilitating maintenance. Moreover, this structure can reduce the vibration mode of the swing arm box.

[0013] Furthermore, the top and the bottom of the annular frame are both provided with a first main shaft through-hole for the main shaft to pass through.

[0014] Furthermore, the arm box body includes an arm bottom plate, two arm side plates arranged at intervals in the front and rear, two arm end plates arranged at intervals in the left and right, an arm cover plate and a connecting wall, and the connecting wall is respectively connected to the arm bottom plate, the two arm side plates and the arm cover plate, and the connecting wall is provided with a second main shaft through hole corresponding to the first main shaft through hole.

[0015] Furthermore, the balancing device also includes a fixed counterweight arranged at the left end of the swing arm box.

[0016] Furthermore, a support block is fixedly arranged on the outside of the swing arm box or the inside of the annular frame, and two support blocks are arranged, and the two support blocks are respectively arranged on the left and right sides of the central axis to limit the rotation limit of the swing arm box. The support block can limit the rotation limit of the swing arm box, which not only ensures that the swing arm box can rotate to cope with the unbalanced state, but also maintains the stability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein: Figure 1 It is a structural schematic diagram of a centrifuge balancing device; Figure 2 It is a structural schematic diagram of a centrifuge balancing device after a part of it is removed; Figure 3 It is a schematic diagram of the structure of the rotating arm side plate and the mounting assembly assembled together in the centrifuge balancing device; Figure 4 for Figure 3 Exploded diagram of .

[0018] Description of reference numerals: 100, annular frame; 101, frame top plate; 102, frame front side plate; 103, frame bottom plate; 104, first spindle through hole; 200, swivel arm box; 201, swivel arm bottom plate; 202, swivel arm end plate; 203, connecting wall; 204, handling platform; 205, inner side plate; 206, first outer side plate; 207, second outer side plate; 208, third outer side plate; 209, shaft mounting hole; 210, plug hole; 211, transverse reinforcement plate; 212, vertical reinforcement plate; 213, first cover plate; 214, second cover plate; 215, second spindle through hole; 216, transverse partition plate; 217, vertical partition plate; 218, screw seat fixing plate; 300, fixed weight; 400, data acquisition module; 401, sensor support; 402, pressure sensor; 501, guide rail; 502, movable counterweight; 503, slider; 504, screw seat; 505, screw; 506, motor; 507, reducer; 600, rotating shaft; 700. Support block. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0020] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0021] Embodiments of the centrifuge balancing device provided by the present invention: like Figures 1 to 4 As shown, the function of the centrifuge balancing device (hereinafter referred to as the balancing device) is to adjust and improve the balance state of the centrifuge in real time when the centrifuge is working, and it includes an annular frame 100, a rotating arm box 200, a fixed counterweight 300, a data acquisition module 400, a balancing adjustment mechanism, a rotating shaft 600, and a support block 700. The annular frame 100 is used to be fixedly connected to the main shaft, and the main shaft drives the annular frame 100 to rotate around the central axis extending up and down. The right end of the rotating arm box 200 is rotatably mounted on the annular frame 100 around the horizontal axis extending forward and backward. The balancing adjustment mechanism is installed in the rotating arm box 200 to improve the balance state of the centrifuge. It should be noted that "left and right" and "front and back" are only relative concepts, which are only used to limit the relative position of the structure, and do not limit the structure of the balancing device.

[0022] Specifically, Figure 1 and Figure 2 As shown, the annular frame 100 is composed of a frame top plate 101, a frame front side plate 102, a frame bottom plate 103, and a frame rear side plate (not marked in the figure) connected end to end. The annular frame 100 has a through passage that runs through left and right, and the right end of the swing arm box 200 penetrates into the through passage. The frame top plate 101 and the frame bottom plate 103 are both provided with a first spindle through hole 104 for the spindle to pass through. The first spindle through holes 104 of the frame top plate 101 and the frame bottom plate 103 extend up and down and are coaxially arranged. The axis of the first spindle through hole 104 is the central axis of the annular frame 100 when it rotates.

[0023] The frame front side plate 102 and the frame rear side plate are both provided with rotation shaft through holes, and the rotation shaft through holes on the frame front side plate 102 and the frame rear side plate extend forward and backward and are coaxially arranged.

[0024] The support block 700 is fixedly mounted on the inner side of the frame bottom plate 103 . Specifically, there are two support blocks 700 , which are respectively located at the front and rear sides of the first spindle through hole 104 .

[0025] like Figures 1 to 4 As shown, the swivel arm box body 200 includes a swivel arm bottom plate 201, two swivel arm side plates, a swivel arm cover plate, two swivel arm end plates 202, a mounting assembly, a connecting wall 203 and a transfer platform 204. The mounting assembly is used to install a balancing adjustment mechanism. The two swivel arm side plates are located at the front and rear sides of the swivel arm box body 200, and the two swivel arm end plates 202 are located at the left and right ends of the swivel arm box body 200. The swivel arm bottom plate 201, the two swivel arm side plates, the swivel arm cover plate, and the two swivel arm end plates 202 are surrounded to form a chamber, and the mounting assembly and the connecting wall 203 are both located in the chamber.

[0026] like Figure 3 and Figure 4 As shown, the structures of the two arm side panels are the same, and the arm side panels are double-layer structures, including an outer side panel, an inner side panel 205, and a reinforcing plate located between the outer side panel and the inner side panel 205. Specifically, the outer side panel includes a first outer side panel 206, a second outer side panel 207, and a third outer side panel 208 connected in sequence from left to right, and the spacing between the two first outer side panels 206 is greater than the spacing between the two third outer side panels 208. The second outer side panel 207 is arranged obliquely to connect the first outer side panel 206 and the third outer side panel 208. A rotating shaft mounting hole 209 is provided on the third outer side panel 208. After assembly, the rotating shaft mounting hole 209 is coaxially arranged with the rotating shaft through hole. The rotating shaft 600 is fixedly installed in the rotating shaft mounting hole 209 and penetrates into the rotating shaft through hole, so that the arm side panel and the rotating arm box body 200 in which it is located can rotate around the axis extending forward and backward.

[0027] The first outer plate 206 and the third outer plate 208 are both provided with insertion holes 210 for the ends of the reinforcing plates to be inserted in an adaptive manner.

[0028] like Figure 3 and Figure 4 As shown, the rightward extension length of the inner side plate 205 is less than the rightward extension length of the third outer side plate 208. The inner side of the right end of the third outer side plate 208 is used to be fixedly connected to the connecting wall 203.

[0029] The reinforcing plate includes a transverse reinforcing plate 211 and a vertical reinforcing plate 212. The plate surface of the transverse reinforcing plate 211 is perpendicular to the up-down direction, and the plate surface of the vertical reinforcing plate 212 is perpendicular to the left-right direction. The front and rear sides of the transverse reinforcing plate 211 are respectively connected to the outer plate and the inner plate 205. The transverse reinforcing plate 211 divides the space between the outer plate and the inner plate 205 into two parts, upper and lower. The upper and lower sides of the transverse reinforcing plate 211 are fixed with vertical reinforcing plates 212, and there are multiple vertical reinforcing plates 212 arranged at intervals on the left and right. The vertical reinforcing plate 212 on the left side connects the first outer plate 206 and the inner plate 205, and the vertical reinforcing plate 212 on the right side connects the third outer plate 208 and the inner plate 205. The transverse reinforcing plate 211 and the vertical reinforcing plate 212 play the role of connection and strength improvement.

[0030] The arm cover plate includes a first cover plate 213 and a second cover plate 214. The first cover plate 213 is located above the outer plate and the top right side of the outer plate, and the second cover plate 214 is fixed above the two inner plates 205. The first cover plate 213 and the second cover plate 214 are connected by screws, wherein the second cover plate 214 is an acrylic cover plate.

[0031] The two rotating arm end plates 202 are respectively fixed to the left and right ends of the two rotating arm side plates.

[0032] The connecting wall 203 has a certain thickness in the left-right direction, and is fixedly connected to the first cover plate 213 at the top, fixedly connected to the swing arm bottom plate 201 at the bottom, and connected to the third outer plate 208 at the front and rear sides, so as to be fixed in the chamber. A through second spindle through hole 215 is provided on the connecting wall 203 for the spindle to pass through. It should be noted that after the spindle passes through the second spindle through hole 215, a gap is retained between the spindle and the hole wall of the second spindle through hole 215 to avoid interference with the rotation of the swing arm box 200 relative to the annular frame 100.

[0033] The mounting assembly is located at the left end of the chamber, and includes a transverse partition 216, a vertical partition 217, and a screw seat fixing plate 218. The surface of the transverse partition 216 is perpendicular to the up-down direction, and the surface of the vertical partition 217 is perpendicular to the left-right direction. The transverse partition 216 is arranged above the bottom plate 201 of the rotating arm in the air, and the left end of the transverse partition 216 is fixed to the end plate 202 of the rotating arm, and the front and rear sides are respectively fixed to the two inner side plates 205.

[0034] The bottom of the vertical partition 217 is fixed on the rotating arm bottom plate 201 , the top is fixed on the right end bottom of the horizontal partition 216 , and the front and rear sides are respectively fixed on the two inner side plates 205 .

[0035] The plate surface of the screw seat fixing plate 218 is perpendicular to the left and right directions, the bottom is fixed to the top of the right end of the transverse partition 216, and the front and rear sides are respectively fixed to the two inner side plates 205. The screw seat fixing plate 218 is used to fix and install the screw seat 504.

[0036] The transport platform 204 is located on the left and right sides of the swivel arm box 200 and is fixed on the swivel arm side panels. The transport platform 204 provides convenience for assembly and maintenance, making the swivel arm box 200 easier to operate when it needs to be transferred or installed.

[0037] The data acquisition module 400 includes a sensor support 401 and a pressure sensor 402 mounted on the sensor support 401. There are eight sensor supports 401, four of which are fixed at the four corners of the frame top plate 101, and the other four are fixed at the four corners of the frame bottom plate 103. Specifically, the four sensor supports 401 at the same location are divided into two groups, the two groups of sensor supports 401 are located on the left and right sides of the first spindle through-hole 104, and the two sensor supports 401 in the same group are distributed on the front and back sides of the first spindle through-hole 104. The pressure sensor 402 is fixedly mounted on the sensor support 401, and the distance between the pressure sensors 402 located on the front and back sides of the first spindle through-hole 104 and the central axis is equal, and the distance between the pressure sensors 402 located on the left and right sides of the first spindle through-hole 104 and the central axis is also equal.

[0038] The balancing adjustment mechanism includes a guide rail 501, a movable counterweight 502, a slider 503 and a driving component. There are two guide rails 501, which are arranged at intervals in the front-to-back direction and extend left and right. The two guide rails 501 are fixed on the two inner side plates 205 respectively. The slider 503 is fixed on the front and back sides of the movable counterweight 502. The slider 503 corresponds to the guide rail 501 one by one and slides together, so that the movable counterweight 502 can move left and right. The function of the driving component is to drive the movable counterweight 502 to move left and right.

[0039] The driving components include a screw seat 504, a screw rod 505, a motor 506, and a reducer 507. The screw seat 504 is fixedly mounted on the screw seat fixing plate 218, and the screw rod 505 is rotatably mounted on the screw seat 504. The screw rod 505 penetrates the movable counterweight 502 and is threadedly matched with the movable counterweight 502. In other words, the movable counterweight 502 is equivalent to the nut in the screw nut mechanism. When the screw rod 505 rotates, it can drive the movable counterweight 502 to move left and right. The motor 506 is fixed on the swing arm bottom plate 201, and the reducer 507 is connected to the motor 506 and the screw rod 505, and the reducer 507 is used to achieve deceleration and torque increase.

[0040] The motor 506 can be started and stopped according to the values ​​of the pressure sensors 402. Specifically, an industrial computer can be provided, which is connected to the motor 506 and the pressure sensor 402. The industrial computer can collect the value of the pressure sensor 402 and compare the value with the set threshold value. When there is a difference between the two, the motor 506 is driven to start forward and reverse. The balance state of the centrifuge can be improved by real-time data collection and dynamic regulation by the industrial computer.

[0041] Working principle: When in use, the right end of the arm box 200 penetrates into the annular frame 100, and the annular frame 100 and the arm box 200 rotate at high speed around the central axis. When the centrifuge is balanced as a whole, the support block 700 does not contact the arm box 200, and the measured value of the pressure sensor 402 is A. When the centrifuge is unbalanced due to uneven mass distribution (such as collapse or structural damage of the model during the test), the left end of the arm box 200 will swing up and down, and the right end of the arm box 200 will press the pressure sensor 402 after the swing. For example: when the left end of the arm box 200 swings downward, the right end of the arm box 200 will press the two pressure sensors 402 on the upper right side and the two pressure sensors 402 on the lower left side; when the right end of the arm box 200 swings upward, the right end of the arm box 200 will press the two pressure sensors 402 on the upper left side and the two pressure sensors 402 on the lower right side. When the pressure sensor 402 is compressed, the feedback measurement value is B, and then the motor 506 is started to drive the movable counterweight 502 to move to achieve balancing, and then the swing arm box 200 swings in the opposite direction to a balanced state.

[0042] In this embodiment, the movable counterweight is driven to move by rotating the screw rod, thereby achieving precise adjustment of ±0.1 mm, and its adjustment accuracy is better than that of traditional hydraulic or spring compensation mechanisms.

[0043] In this embodiment, the plates (such as the swing arm bottom plate 201, the swing arm side plate, the swing arm cover plate, the swing arm end plate 202, the transverse partition 216, the vertical partition 217, and the screw seat fixing plate 218) are assembled together by welding, which improves the solidity and durability of the overall structure and reduces the risk of mechanical failure due to long-term use.

[0044] In this embodiment, the rotation limit of the swivel arm box can be limited by setting two support blocks, thereby maintaining the stability of the structure. In other embodiments, the support blocks can be eliminated, and the rotation limit of the swivel arm box can be limited by the top and bottom of the annular frame.

[0045] In this embodiment, the annular frame is provided with a first spindle through-hole and the connecting wall is provided with a second spindle through-hole, both for the spindle to pass through, so that the spindle can drive the annular frame to rotate. In other embodiments, the spindle can be fixedly connected only to the bottom of the annular frame, so as to drive the annular frame to rotate.

[0046] In this embodiment, the driving component includes a screw and a motor, and the rotation of the screw drives the moving weight to move, which can achieve precise adjustment of ±0.1mm. In other embodiments, in scenarios with relatively low precision requirements, the driving component can also be replaced with a hydraulically driven structure.

[0047] In this embodiment, the swing arm side plate of the swing arm box body is a double-layer structure. In other embodiments, the swing arm side plate can also be a single-layer structure.

[0048] In this embodiment, the swing arm housing has a chamber, and the balancing adjustment mechanism is located in the chamber. In other embodiments, if only for the purpose of achieving dynamic balancing, the balancing adjustment mechanism can also be arranged outside the swing arm housing.

[0049] In this embodiment, there are eight pressure sensors, four at the top and four at the bottom. The four pressure sensors at the top and the bottom constitute a pressure sensor assembly. The pressure sensor assembly is divided into two groups arranged at intervals on the left and right. Each group has two pressure sensors, and the two pressure sensors in each group are located on the front and back sides of the central axis. In other embodiments, each group may have only one pressure sensor, that is, the same pressure sensor assembly contains only two pressure sensors, and the two pressure sensors are arranged opposite to the central axis on the left and right sides.

[0050] In this embodiment, the cross section of the annular frame is a quadrilateral. In other embodiments, the shape of the annular frame can be other symmetrical shapes, such as an octagon.

[0051] In addition, in the description of this specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

Claims

1. A centrifuge balancing device, characterized in that: include: The annular frame (100) is used to be connected to the main shaft of the centrifuge, so that the main shaft drives the annular frame (100) to rotate around a central axis extending up and down; A swivel arm box (200), the right end of which penetrates into the annular frame (100), and the right end of the swivel arm box (200) is rotatably mounted on the annular frame (100) around an axis extending forward and backward; The data acquisition module (400) comprises a pressure sensor assembly located between the top outer side of the swivel arm housing (200) and the top inner side of the annular frame (100), and between the bottom outer side of the swivel arm housing (200) and the bottom inner side of the annular frame (100), each of the pressure sensor assemblies comprising a pressure sensor (402) disposed on the left and right sides of the central axis; A balancing adjustment mechanism is provided on the tumble arm housing (200), comprising a movable counterweight (502) slidably mounted on the tumble arm housing (200) in the left-right direction and a driving component for driving the movable counterweight (502) to move, wherein the driving component drives the movable counterweight (502) to move in response to a value of the pressure sensor (402) for balancing.

2. The centrifuge balancing device according to claim 1, characterized in that: Each of the pressure sensor assemblies comprises four pressure sensors (402), the four pressure sensors (402) being divided into two groups located on the left and right sides of the central axis, and the two pressure sensors (402) in each group being located on the front and rear sides of the central axis.

3. The centrifuge balancing device according to claim 2, characterized in that: Sensor supports (401) are fixed on both the left and right sides of the annular frame (100), and the pressure sensor (402) is arranged on the sensor support (401).

4. The centrifuge balancing device according to claim 1, 2 or 3, characterized in that: The swing arm housing (200) has a chamber therein, and the balancing adjustment mechanism is arranged at a left position in the chamber.

5. The centrifuge balancing device according to claim 4, characterized in that: The tumbler housing (200) comprises a tumbler bottom plate (201) enclosing the chamber, two tumbler side plates arranged at intervals in front and back, two tumbler end plates (202) arranged at intervals in left and right, and a tumbler cover plate; The swing arm side plate is a double-layer structure, comprising an outer plate, an inner plate (205), and a reinforcing plate located between the outer plate and the inner plate (205).

6. The centrifuge balancing device according to claim 5, characterized in that: The tumbler housing (200) further comprises a mounting assembly located in the chamber, the balancing adjustment mechanism being arranged on the mounting assembly, the mounting assembly comprising a transverse partition (216) arranged in the air above the tumbler bottom plate (201), a vertical partition (217) fixedly arranged below the transverse partition (216), and a screw seat fixing plate (218) fixedly arranged above the transverse partition (216); The movable counterweight (502) is located above the transverse partition (216), and the driving component comprises a screw seat (504) fixedly mounted on the screw seat fixing plate (218), and a screw (505) rotatably mounted on the screw seat, wherein the screw (505) passes through the movable counterweight (502) and drives the movable counterweight (502) to move left and right when rotating.

7. The centrifuge balancing device according to claim 1, 2 or 3, characterized in that: The top and bottom of the annular frame (100) are both provided with a first main shaft through-hole (104) for the main shaft to pass through.

8. The centrifuge balancing device according to claim 7, characterized in that: The tumbler box (200) comprises a tumbler bottom plate (201), two tumbler side plates arranged at intervals in front and back, two tumbler end plates (202) arranged at intervals in left and right, a tumbler cover plate and a connecting wall (203); the connecting wall (203) is respectively connected to the tumbler bottom plate (201), the two tumbler side plates and the tumbler cover plate; and the connecting wall (203) is provided with a second spindle through-hole (215) corresponding to the first spindle through-hole (104).

9. The centrifuge balancing device according to claim 1, 2 or 3, characterized in that: The balancing device also includes a fixed counterweight (300) arranged at the left end of the swing arm box (200).

10. The centrifuge balancing device according to claim 1, 2 or 3, characterized in that: A support block (700) is fixedly provided on the outside of the swivel arm box (200) or the inside of the annular frame (100), and two support blocks (700) are arranged, and the two support blocks (700) are respectively arranged on the left and right sides of the central axis to limit the rotation limit of the swivel arm box (200).

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