A centrifuge with mechanically linked damping support

Abstract

The application relates to a centrifugal machine with mechanical linkage damping support and relates to the field of centrifugal machine damping control technology, and comprises a shell, a motor, a rotor assembly, a motor base, three magnetorheological dampers, a sensor module and a control module. The motor base is fixed to the motor shell, the three magnetorheological dampers are uniformly arranged along the motor circumference, the sensor module is fixed to the bottom of the motor and is used for detecting vibration signals and rotating speed signals of the motor. The control current of each magnetorheological damper is dynamically adjusted according to the signals fed back by the sensor module, so that the damping force is actively changed, the motor and the rotor assembly always obtain the damping support matched with the current exciting frequency in the variable speed process. The three magnetorheological dampers form circumferentially-distributed adjustable damping support points, which not only ensure the support rigidity, but also provide optimal damping when the rotor crosses the critical rotating speed, effectively suppress resonance, reduce the vibration amplitude of the whole machine and improve the operation stability and separation quality of the centrifugal machine.

Description

Technical Field

[0001] This application relates to the field of centrifuge vibration reduction and control technology, and in particular to a centrifuge with mechanical linkage damping support. Background Technology

[0002] Centrifuges are widely used in biopharmaceutical, chemical, and medical testing fields. They typically use a motor to drive a rotor assembly to rotate at high speed, causing test tubes or containers placed inside the rotor assembly to rotate synchronously, thereby achieving material separation. Because the rotor assembly is susceptible to vibrations during high-speed rotation due to uneven loading, differences in rotor specifications, and speed variations, the motor and rotor assembly will generate vibrations. Therefore, centrifuges usually require a vibration-damping support structure between the motor and the casing to reduce the impact of vibration on the overall stability and service life of the machine.

[0003] In existing centrifuges, passive damping structures such as rubber shock absorbers and hydraulic dampers are often used to support the motor and the casing. These passive damping structures are typically connected at one end to the motor or motor mounting base and at the other end to the centrifuge casing. They absorb the vibration energy generated during the operation of the motor and rotor assembly through their own material or internal hydraulic damping. Because the damping characteristics of passive damping structures are essentially fixed after installation, they can effectively reduce vibration within a certain speed range.

[0004] However, during actual operation, the specifications of the rotor assembly, its loading condition, and the motor speed of the centrifuge may all change. The vibration amplitude and frequency generated by the motor and rotor assembly differ under different operating conditions. Existing passive damping structures cannot adjust the support damping according to the real-time vibration and speed conditions of the motor, resulting in poor vibration reduction adaptability of the centrifuge under different speed conditions. Therefore, improving the vibration reduction adaptability of the centrifuge under different speed conditions is an urgent technical problem to be solved. Summary of the Invention

[0005] In order to improve the vibration reduction adaptability of centrifuges under different speed conditions, so as to improve the operational stability and service life of the equipment, this application provides a centrifuge with mechanical linkage damping support.

[0006] A centrifuge with mechanical linkage damping support includes a housing, a motor, and a rotor assembly fixedly connected to the output shaft of the motor. It further includes: a motor base fixed to the motor housing; three magnetorheological dampers arranged in a circumferential array around the outer periphery of the motor, each magnetorheological damper having one end rotatably connected to the motor base and the other end rotatably connected to the centrifuge housing; a sensor module fixedly connected to the bottom of the motor for detecting vibration and rotational speed signals of the motor; and a control module electrically connected to the sensor module and the magnetorheological dampers, adjusting the control current input to the magnetorheological dampers based on the signals fed back from the sensor module.

[0007] By adopting the above technical solution, the sensor module detects the vibration and speed of the motor in real time, and the control module dynamically adjusts the current supplied to each magnetorheological damper according to the detection signal, thereby actively and continuously changing the magnitude of the damping force provided by the damper, so that the motor and rotor assembly always obtain damping support that matches the current excitation frequency during speed change; the three magnetorheological dampers form a circumferentially distributed adjustable damping support point between the motor and the housing, which not only ensures the support rigidity, but also provides optimal damping when the rotor crosses the critical speed, effectively suppressing resonance, significantly reducing the vibration amplitude of the whole machine, and improving the operating stability and separation quality of the centrifuge.

[0008] Preferably, the rotor assembly includes a rotor frame, multiple hanging baskets, and a receiving cylinder; the rotor frame is fixedly connected to the output shaft of the motor, the multiple hanging baskets are arranged in a circumferential array on the rotor frame, each hanging basket has a hanging lug at both ends, the rotor frame has a corresponding opening groove that mates with the hanging lug, and the receiving cylinder is placed inside the hanging basket.

[0009] By adopting the above technical solution, multiple baskets are arranged in a circumferential array on the rotor frame, so that the receiving cylinder can be evenly arranged around the output shaft with the rotor frame. The baskets are hung in the open slots of the rotor frame through the hanging ears, and the centrifugal force is used to automatically achieve reliable radial and axial positioning. The structure is simple, easy to assemble and disassemble, and no additional fasteners are required, which effectively reduces the assembly complexity of the rotor assembly.

[0010] Preferably, the motor base has a mounting block corresponding to each magnetorheological damper, and one end of the magnetorheological damper is rotatably connected to the mounting block; the mounting block is inserted vertically into a mounting groove opened on the motor base; the motor base is provided with a limit device corresponding to the mounting block to limit the sliding of the mounting block relative to the motor base.

[0011] By adopting the above technical solution, the magnetorheological damper is connected to the motor base through a mounting block. After the mounting block is inserted into the mounting groove in the vertical direction, the mounting block is restricted from sliding relative to the motor base by a limiting device, so that a detachable connection structure is formed between the magnetorheological damper and the motor base, which facilitates the assembly, maintenance and replacement of the magnetorheological damper.

[0012] Preferably, the mounting block has a limiting hole, and the limiting device includes a limiting block, a first elastic element, and a driving element; the limiting block is slidably disposed on the motor base along the radial direction of the motor output shaft and cooperates with the limiting hole; the first elastic element is disposed on the motor base and drives the limiting block to slide away from the mounting block; the driving element is disposed on the motor base and is used to drive the limiting block to slide towards the mounting block against the elastic force of the first elastic element; the limiting block has a locking position for inserting into the limiting hole to lock the mounting block, and an unlocking position for exiting the limiting hole to release the limiting of the mounting block.

[0013] By adopting the above technical solution, the limiting block slides radially along the output shaft and cooperates with the limiting hole on the mounting block. Under the action of the driving component, the limiting block can be inserted into the limiting hole, so that the mounting block is restricted in the mounting groove. When the driving component releases the driving of the limiting block, the first elastic element drives the limiting block to slide away from the mounting block, so that the limiting block exits the limiting hole, thereby allowing the mounting block to be taken out along the mounting groove.

[0014] Preferably, the driving component includes a driving rod, a driving block, and a guide wheel; the driving rod is slidably mounted on the motor base in a vertical direction, the driving block is fixedly connected to the side of the driving rod facing the limiting block, the driving block is provided with a first guide slope, and the guide wheel is rotatably connected to the end of the limiting block facing the driving rod; when the driving rod slides downward, the guide wheel slides along the first guide slope to the side of the driving block facing the limiting block, and the limiting block slides from the unlocked position to the locked position.

[0015] By adopting the above technical solution, the vertical movement of the drive rod can be converted into the radial movement of the limit block through the cooperation of the first guide inclined surface and the guide wheel, so that the limit block is inserted into the limit hole when the drive rod moves down; the rolling cooperation between the guide wheel and the first guide inclined surface can reduce the frictional resistance when the drive block pushes the limit block, making the locking action of the limit block smoother.

[0016] Preferably, the tops of the drive rods of the three limiting devices are fixedly connected to the same connecting plate. The connecting plate is annular and sleeved on the outside of the output shaft of the motor, and is clearance-fitted with the output shaft. The top surface of the connecting plate is provided with an annular groove. A collar is detachably sleeved on the output shaft. When the collar is fixed on the output shaft, the bottom surface of the collar abuts against the groove to keep the connecting plate in a downward position.

[0017] By adopting the above technical solution, a single collar can simultaneously lock the three drive rods and connecting plates to the downward position, thereby locking the mounting blocks of the three magnetorheological dampers simultaneously. During disassembly, simply releasing the collar allows the connecting plate to move upward, achieving simultaneous unlocking of the three dampers. This linkage structure greatly simplifies the multi-point locking operation and improves installation and maintenance efficiency.

[0018] Preferably, the top of the output shaft is provided with a tapered surface, and the top of the connecting plate is provided with a retaining ring, which is located inside the opening of the settling groove; at least two base plates are fixedly connected to the outer circumferential surface of the collar, and a telescopic rod is slidably connected in each base plate; a second elastic element is provided in the base plate, which drives the telescopic rod to slide toward the output shaft, and the telescopic rod has an extended position extending out of the base plate and located below the retaining ring, and a retracted position retracted into the base plate; one end of the telescopic rod near the output shaft abuts against the output shaft, and the tapered surface is located on the abutment path of the telescopic rod as it moves upward with the collar.

[0019] By adopting the above technical solution, when the collar is in the installation position, the outer circumference of the output shaft forms support on the end of the telescopic rod near the output shaft, allowing the end of the telescopic rod away from the output shaft to be located below the retaining ring. When the collar moves upward relative to the output shaft, the end of the telescopic rod away from the output shaft engages with the retaining ring and drives the connecting plate to move upward, causing the connecting plate to drive the three drive rods to move upward synchronously. When the end of the telescopic rod near the output shaft moves to the tapered surface, the second elastic element drives the telescopic rod to slide towards the output shaft, causing the end of the telescopic rod away from the output shaft to disengage from the retaining ring, making it easier for the collar to continue to be disassembled upward from the output shaft.

[0020] Preferably, the telescopic rod includes a rod body, an abutment block, and a third elastic element; the rod body is slidably connected to the base plate, and the second elastic element acts between the rod body and the base plate; the abutment block is slidably disposed at the end of the rod body away from the output shaft, and the bottom of the abutment block is provided with a second guide slope, which is disposed towards the upper edge of the retaining ring; the third elastic element is disposed in the rod body, driving the abutment block to slide towards the outside of the rod body; when the third elastic element is in its natural state, the abutment block can extend into the lower part of the retaining ring.

[0021] By adopting the above technical solution, when installing the collar, pressing down on the collar causes the second guide slope of the abutment block to first contact the upper edge of the retaining ring, generating a thrust towards the inside of the rod body. This causes the abutment block to automatically retract and move out of position without manual intervention. After the abutment block passes the retaining ring, the third elastic element pushes it out and locks it under the retaining ring, achieving automatic locking. This structure achieves automatic retraction and locking during installation, significantly improving the continuity and convenience of operation.

[0022] Preferably, a fixing pin is provided radially through the collar, and the fixing pin passes through both the collar and the output shaft to fix the collar to the output shaft.

[0023] By adopting the above technical solution, the fixing pin passes through both the collar and the output shaft, enabling the collar to rotate synchronously with the output shaft and remain at a predetermined height position on the output shaft; during disassembly, the fixing pin can be pulled out to release the fixing relationship between the collar and the output shaft, providing a structural basis for the collar to move upward and for subsequent disassembly.

[0024] Preferably, the rotor frame is sleeved outside the collar, the bottom of the rotor frame abuts against the base plate, and locking blocks are slidably connected to both ends of the rotor frame corresponding to the fixing pin. The locking blocks are provided with locking grooves for the ends of the fixing pin to be inserted. The rotor frame is provided with a fourth elastic element, which drives the locking blocks to slide toward the fixing pin. The rotor frame is also provided with through grooves for both ends of the fixing pin to pass through.

[0025] By adopting the above technical solution, the rotor frame is sleeved outside the collar and supported by the base plate. The end of the fixing pin can be embedded in the locking groove of the locking block, so that the fixing pin can limit the rotor frame while fixing the collar and the output shaft. When the locking block overcomes the elastic force of the fourth elastic element and slides away from the fixing pin, the two ends of the fixing pin can be separated from the rotor frame through the through groove, so that the rotor frame can be removed relative to the collar, while the collar can still be held on the output shaft by the fixing pin, thereby facilitating the step-by-step disassembly of the rotor assembly and the collar structure.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. By setting three magnetorheological dampers in a circumferential array between the motor base and the housing, and using a sensor module to collect motor vibration and speed signals, the control module can adjust the control current input to the magnetorheological dampers according to the motor operating status, so that the centrifuge has better vibration reduction adaptability under different speed conditions.

[0028] 2. By cooperating with the mounting block, mounting slot, limit block, drive rod and connecting plate, the ends of the three magnetorheological dampers near the motor base can be locked or released synchronously, improving the consistency of operation during the assembly and maintenance of the magnetorheological dampers. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0030] Figure 2 This is an assembly diagram of the suspended platform and the receiving cylinder according to an embodiment of this application.

[0031] Figure 3 This is a schematic diagram of the connection structure between the magnetorheological damper and the motor mount according to an embodiment of this application.

[0032] Figure 4 This is a schematic diagram of the disassembly state of the mounting block according to an embodiment of this application.

[0033] Figure 5 This is a schematic diagram of the linkage structure of the collar, connecting plate and drive rod in an embodiment of this application.

[0034] Figure 6 yes Figure 5 The enlarged view of section A mainly shows the cooperation relationship between the telescopic rod, the retaining ring, the abutment block, and the second guide slope.

[0035] Figure 7 This is a structural schematic diagram of the assembly relationship between the rotor frame, collar, and base plate according to an embodiment of this application.

[0036] Figure 8 This is a schematic diagram of the rotor frame and collar locking state according to an embodiment of this application.

[0037] Explanation of reference numerals in the attached drawings: 1. Motor; 11. Output shaft; 111. Conical surface; 2. Motor base; 21. Mounting slot; 22. Mounting block; 221. Limiting hole; 23. Fifth elastic element; 3. Limiting device; 31. Limiting block; 32. First elastic element; 33. Driving element; 331. Driving rod; 332. Driving block; 3321. First guide slope; 333. Guide wheel; 4. Rotor assembly; 41. Rotor frame; 411. Opening slot; 412. Through-hole 413. Through slot; 413. Locking block; 4131. Locking slot; 414. Fourth elastic element; 42. Suspended basket; 421. Hanging lug; 43. Receiving cylinder; 5. Magnetorheological damper; 6. Sensor module; 7. Connecting plate; 71. Sinking groove; 72. Retaining ring; 8. Collar; 81. Base plate; 811. Second elastic element; 812. Ball bearing; 82. Fixing pin; 9. Telescopic rod; 91. Rod body; 92. Abutment block; 921. Second guide slope; 93. Third elastic element. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0039] This application discloses a centrifuge with mechanically linked damping support, referring to... Figure 1 The centrifuge mainly includes a housing, a motor 1, a rotor assembly 4, a motor base 2, magnetorheological dampers 5, a sensor module 6, and a control module. The housing serves as the mounting base, housing and supporting the main components of the centrifuge. The motor 1 has an output shaft 11 arranged vertically. The rotor assembly 4 is fixedly connected to the output shaft 11, enabling the motor 1 to drive the rotor assembly 4 to rotate for centrifugation. The motor base 2 is fixedly connected to the housing of the motor 1. The motor base 2 can be made of metal casting or welded parts and is fastened to the housing of the motor 1 with bolts. Between the motor base 2 and the centrifuge housing, three magnetorheological dampers 5 are evenly arranged circumferentially around the motor 1. One end of each magnetorheological damper 5 is rotatably connected to the motor base 2 (specifically, it can be hinged), and the other end is rotatably connected to the centrifuge housing (also hinged). The three magnetorheological dampers 5 form a stable triangular support, bearing the weight of the motor 1 and rotor assembly 4, and constraining the vibration of the motor 1 in the radial and circumferential directions.

[0040] A sensor module 6 is fixedly installed at the bottom of the motor 1. The sensor module 6 integrates a vibration sensor and a speed sensor, enabling real-time detection of the vibration amplitude and frequency of the motor 1 during operation, as well as the speed signal of the output shaft 11. A control module is electrically connected to the sensor module 6 and the three magnetorheological dampers 5. The control module includes a microprocessor, a signal acquisition circuit, and a current drive circuit. It receives the vibration and speed signals fed back from the sensor module 6, calculates the required damping force for each magnetorheological damper 5 according to a preset control algorithm (such as PID control, fuzzy control, or adaptive control), and outputs the corresponding control current to the excitation coil of each magnetorheological damper 5, thereby dynamically and continuously adjusting the damping value of the magnetorheological dampers 5. Since the hardware configuration and basic control logic of the control module are existing technologies, they will not be described in detail here.

[0041] During centrifuge operation, motor 1 drives rotor assembly 4 to rotate at increased, constant, or decreased speeds. Sensor module 6 collects vibration and speed signals from motor 1 in real time. The control module adjusts the control current of the three magnetorheological dampers 5 according to the current operating state of motor 1, so that the three magnetorheological dampers 5 form adjustable damping support between motor 1 and the housing. When rotor assembly 4 experiences significant vibration due to loading conditions, speed changes, or exceeding critical speeds, the control module can increase or adjust the corresponding damping force, so that the vibration energy generated by motor 1 and rotor assembly 4 is absorbed after being transferred to the magnetorheological dampers 5 via motor base 2, thereby reducing the overall vibration amplitude.

[0042] Reference Figure 1 as well as Figure 2The rotor assembly 4 includes a rotor frame 41, multiple hanging baskets 42, and a receiving cylinder 43. The rotor frame 41 is fixedly connected to the output shaft 11 of the motor 1. The multiple hanging baskets 42 are arranged in a circumferential array on the rotor frame 41. Each hanging basket 42 has a hanging lug 421 at both ends, and the rotor frame 41 has a corresponding opening slot 411 that mates with the hanging lug 421. The hanging basket 42 is hung in the corresponding opening slot 411 through the hanging lug 421 at both ends. The receiving cylinder 43 is placed inside the hanging basket 42 and is used to receive test tubes. Specifically, the hanging basket 42 can be arranged in a ring shape, and the inner diameter of the hanging basket 42 is adapted to the outer diameter of the receiving cylinder 43, so that the receiving cylinder 43 can be placed stably inside the hanging basket 42. The opening slot 411 can be tilted, with the opening of the opening slot 411 facing upward and toward the output shaft 11 of the motor 1, so that the basket 42 can maintain the engagement state with the opening slot 411 under centrifugal force during the rotation of the rotor frame 41, reducing the possibility of the basket 42 falling off the rotor frame 41.

[0043] Reference Figure 3 as well as Figure 4 Each magnetorheological damper 5 is provided with a mounting block 22 on the motor base 2. The end of the magnetorheological damper 5 near the motor base 2 is rotatably connected to the corresponding mounting block 22. The motor base 2 has a mounting groove 21 that mates with the mounting block 22. The mounting block 22 is inserted vertically into the mounting groove 21. The mounting block 22 has a dovetail groove, and a dovetail block that mates with the dovetail groove is provided in the mounting groove 21. A fifth elastic element 23 is provided between the bottom of the mounting groove 21 and the lower end of the mounting block 22. The fifth elastic element 23 is a compression spring, which applies an upward elastic force to the mounting block 22. After the limiting device 3 releases the constraint on the mounting block 22, the fifth elastic element 23 can push the mounting block 22 upward out of the mounting groove 21, making it convenient for the operator to remove the magnetorheological damper 5 assembly.

[0044] To prevent the mounting block 22 from detaching during equipment operation, a limiting device 3 is provided on the motor base 2 for each mounting block 22. The limiting device 3 restricts the sliding of the mounting block 22 relative to the motor base 2, keeping the mounting block 22 within the mounting groove 21. The limiting device 3 includes a limiting block 31, a first elastic element 32, and a driving element 33. The limiting block 31 is slidably disposed on the motor base 2 along the radial direction of the output shaft 11 of the motor 1. A limiting hole 221 is provided on the mounting block 22, and the limiting block 31 cooperates with the limiting hole 221. The limiting block 31 has a locking position for inserting into the limiting hole 221 to lock the mounting block 22, and an unlocking position for withdrawing from the limiting hole 221 to release the limiting of the mounting block 22. The first elastic element 32 is a tension spring or a compression spring, disposed between the motor base 2 and the limiting block 31. Its elastic force is directed to move the limiting block 31 away from the mounting block 22, that is, normally pushing the limiting block 31 to the unlocking position. The driving member 33 is used to drive the limiting block 31 to slide toward the mounting block 22 against the elastic force of the first elastic member 32, so that it enters the locked position.

[0045] The driving component 33 includes a driving rod 331, a driving block 332, and a guide wheel 333. The driving rod 331 is slidably mounted in a vertical guide hole on the motor base 2, with its lower end extending into the groove area where the limiting block 31 is located. The driving block 332 is fixedly connected to the side of the driving rod 331 facing the limiting block 31, and a first guide slope 3321 is provided on the driving block 332. The guide wheel 333 is rotatably connected to the end of the limiting block 31 facing the driving rod 331. When the driving rod 331 slides downward, the guide wheel 333 slides along the first guide slope 3321 to the side of the driving block 332 facing the limiting block 31. With the cooperation of the first guide slope 3321 and the guide wheel 333, the vertical movement of the driving rod 331 is converted into the radial movement of the limiting block 31, causing the limiting block 31 to slide from the unlocked position to the locked position. After the drive rod 331 moves upward, the drive block 332 releases its push on the guide wheel 333, and the first elastic element 32 pushes the limit block 31 to slide away from the mounting block 22, so that the limit block 31 exits the limit hole 221 and returns to the unlocked position. At this time, the mounting block 22 can pop up upward under the action of the fifth elastic element 23.

[0046] Reference Figure 5 as well as Figure 6 To achieve synchronous locking and unlocking of the three magnetorheological dampers 5, the upper ends of the drive rods 331 of the three limiting devices 3 all extend upwards from the motor base 2 and are fixedly connected to the same connecting plate 7. The connecting plate 7 is generally annular, with an inner diameter larger than the outer diameter of the output shaft 11. It is fitted around the outer circumference of the output shaft 11 with a clearance fit to ensure that the output shaft 11 does not rub against the connecting plate 7 when rotating. The connecting plate 7 can move up and down relative to the output shaft 11. The top surface of the connecting plate 7 is machined with an annular groove 71, and the bottom surface of the groove 71 is flat.

[0047] A collar 8 is detachably fitted onto the output shaft 11 above the connecting plate 7, and is located below the rotor frame 41. The collar 8 is an annular component, and the top of the output shaft 11 has a tapered surface 111, the diameter of which gradually increases from top to bottom. The inner hole of the collar 8 mates with the outer diameter of the output shaft 11 and the tapered surface 111. The collar 8 is fixed to the output shaft 11 by a radially inserted fixing pin 82. A radial through hole is provided on the side wall of the output shaft 11, and a corresponding pin hole is provided on the collar 8. The fixing pin 82 passes through the pin hole of the collar 8 and the through hole of the output shaft 11, locking the collar 8 onto the output shaft 11 so that it cannot rotate relative to the shaft or move up and down. When the collar 8 is locked onto the output shaft 11 by the fixing pin 82, the bottom surface of the collar 8 falls into the groove 71 of the connecting plate 7 and abuts against the bottom surface of the groove 71, thereby pressing the connecting plate 7 into the downward position, and then using the three drive rods 331 to simultaneously keep the three limit blocks 31 in the locked position.

[0048] Reference Figure 5 as well as Figure 6 Since the collar 8 rotates with the output shaft 11 while the connecting plate 7 does not rotate, in order to reduce the frictional resistance between the bottom surface of the collar 8 and the bottom surface of the groove 71 of the connecting plate 7, multiple balls 812 are embedded on the bottom surface of the collar 8. The balls 812 can be evenly distributed along the circumference, and their lower ends protrude slightly from the bottom surface, forming rolling friction with the bottom surface of the groove 71, thereby avoiding wear and power loss caused by the relative rotation of the two.

[0049] To facilitate the disassembly of the collar 8 and the release of the locking of the mounting block 22, the top of the connecting plate 7 extends to form a retaining ring 72 at the inner edge of the opening of the recess 71. The retaining ring 72 is a horizontal annular flange. At least two base plates 81 are fixedly connected to the outer circumference of the collar 8. The base plates 81 are horizontally plate-shaped and extend outward. Horizontal guide holes are machined inside the base plates 81. The length of the base plates 81 is less than the inner diameter of the retaining ring 72. A telescopic rod 9 is slidably connected inside each base plate 81. The telescopic rod 9 is arranged radially along the output shaft 11, with one end close to the output shaft 11 and the other end close to the retaining ring 72. A second elastic element 811 is provided between the base plate 81 and the telescopic rod 9. The second elastic element 811 is a compression spring, and its elastic force is directed to drive the telescopic rod 9 to slide towards the output shaft 11, that is, to force the telescopic rod 9 to move radially inward. The end of the telescopic rod 9 closest to the output shaft 11 is always in contact with the tapered surface 111 or cylindrical surface of the output shaft 11; the end of the telescopic rod 9 furthest from the output shaft 11 can extend under the retaining ring 72 under certain conditions. The position of the tapered surface 111 is exactly on the path that the inner end of the telescopic rod 9 travels when it moves upward with the collar 8.

[0050] When the collar 8 is in the installation position, the outer circumference of the output shaft 11 provides support to the end of the telescopic rod 9 closest to the output shaft 11, keeping the end of the telescopic rod 9 away from the output shaft 11 in a position where it can abut against the lower side of the retaining ring 72. When it is necessary to remove the collar 8 or release the downward movement of the three drive rods 331, first release the fixation between the collar 8 and the output shaft 11, and then pull the collar 8 upward. When the collar 8 moves upward, the end of the telescopic rod 9 away from the output shaft 11 abuts against the retaining ring 72, and drives the connecting plate 7 to move upward synchronously through the retaining ring 72. When the connecting plate 7 moves upward, it drives the three drive rods 331 to move upward synchronously, causing the drive block 332 to gradually disengage from the guide wheel 333, and the limiting block 31 to exit the limiting hole 221 under the action of the first elastic element 32. As the collar 8 continues to move upward, the end of the telescopic rod 9 near the output shaft 11 moves to the tapered surface 111 at the top of the output shaft 11. The second elastic element 811 drives the telescopic rod 9 to slide towards the output shaft 11, causing the end of the telescopic rod 9 away from the output shaft 11 to gradually disengage from below the retaining ring 72. After the telescopic rod 9 disengages from the retaining ring 72, the collar 8, the base plate 81, and the telescopic rod 9 can continue to move upward away from the output shaft 11.

[0051] The telescopic rod 9 can be assembled in a split structure, comprising a rod body 91, an abutment block 92, and a third elastic element 93. The rod body 91 slides into the guide hole of the base plate 81. The two ends of the second elastic element 811 abut against the inner end of the rod body 91 and the bottom of the inner cavity of the base plate 81, respectively. A receiving hole is opened at the end of the rod body 91 away from the output shaft 11, and the abutment block 92 is slidably installed in the receiving hole. The third elastic element 93 is a compression spring, installed in the receiving hole, and elastically pushes the abutment block 92 outward (i.e., towards the retaining ring 72). A second guide slope 921 is machined on the bottom of the abutment block 92, which faces the upper edge of the retaining ring 72. In the natural state of the third elastic element 93, the abutment block 92 protrudes from the end face of the rod body 91, extending below the retaining ring 72.

[0052] When installing collar 8: First, slip collar 8 onto output shaft 11 and press down. At this time, the inner end of telescopic rod 9 contacts the tapered surface 111 of output shaft 11. As collar 8 moves down, the inner end of telescopic rod 9 gradually moves from the smaller diameter at the top of tapered surface 111 to the larger diameter at the bottom. Tapered surface 111 generates an outward pushing force on the inner end of telescopic rod 9, forcing telescopic rod 9 to overcome the inward elastic force of the second elastic element 811 and extend outward. At the same time, the abutment block 9 at the outer end of telescopic rod 9... The second guide ramp 921 of the 2nd guide ring touches the upper edge of the retaining ring 72. The retaining ring 72 exerts an inward pushing force on the ramp, causing the abutment block 92 to compress the third elastic element 93 and retract inward, allowing the retaining ring 72 to pass. After the abutment block 92 has completely passed the retaining ring 72, the third elastic element 93 pushes the abutment block 92 outward, extending it below the retaining ring 72. At this time, the telescopic rod 9 is in the extended position, with its outer end abutting block 92 located below the retaining ring 72 and the extended end of the rod body 91 located outside the retaining ring 72. Continue pressing down the collar 8 until its bottom surface contacts the bottom of the countersunk groove 71, and then use the fixing pin 82 to lock the collar 8 onto the output shaft 11. At this point, the collar 8 is installed. The collar 8 presses down on the connecting plate 7, and the connecting plate 7 simultaneously locks the three mounting blocks 22 through the drive rod 331 and the limiting block 31.

[0053] During disassembly: First, pull out the retaining pin 82 to release the circumferential and axial fixation between the collar 8 and the output shaft 11. Then, pull the collar 8 upward. In the initial stage of lifting, the inner end of the telescopic rod 9 is still close to the larger diameter section of the conical surface 111. The inward elastic force of the second elastic element 811 keeps the inner end in contact with the conical surface 111, but the abutment block 92 at the outer end of the telescopic rod 9 is still located below the retaining ring 72. As the collar 8 moves upward, the inner end of the telescopic rod 9 slides to the smaller diameter section of the conical surface 111. Under the action of the second elastic element 811, the entire telescopic rod 9 gradually retracts towards the output shaft 11 (inward). However, before the telescopic rod 9 is fully retracted, its outer end can still hook onto the retaining ring 72. Therefore, the force of lifting the collar 8 is transmitted to the retaining ring 72 through the base plate 81 and the telescopic rod 9, causing the connecting plate 7 to move upward synchronously. When the connecting plate 7 moves upward, it drives the three drive rods 331 upward. The first guide slope 3321 of the drive block 332 leaves the guide wheel 333, and the limiting block 31 exits the limiting hole 221 under the pull of the first elastic element 32, thus completing the synchronous unlocking of the three mounting blocks 22. When the inner end of the telescopic rod 9 continues to move upward until it leaves the conical surface 111 or reaches the small diameter at the top of the conical surface 111, the inward retraction of the telescopic rod 9 is sufficient to completely disengage the abutment block 92 at its outer end from below the retaining ring 72. At this time, the connecting plate 7 stops moving upward due to the loss of traction, and the collar 8 can be completely removed. Subsequently, the mounting block 22 is pushed upward out of the mounting groove 21 a distance under the elastic force of the fifth elastic element 23. The operator can then easily pull out the magnetorheological damper 5 together with the mounting block 22 to complete the disassembly.

[0054] Reference Figure 7 as well as Figure 8 The rotor frame 41 is sleeved on the outside of the collar 8, and the bottom of the rotor frame 41 abuts against the base plate 81, so that the base plate 81 can support the rotor frame 41. Locking blocks 413 are slidably connected to both ends of the rotor frame 41 corresponding to the fixing pin 82. The locking blocks 413 have locking grooves 4131 for the ends of the fixing pin 82 to be inserted. A fourth elastic element 414 is provided on the rotor frame 41. The fourth elastic element 414 acts on the locking blocks 413 and drives the locking blocks 413 to slide towards the fixing pin 82. The fourth elastic element 414 is specifically a compression spring. The rotor frame 41 also has through grooves 412 for both ends of the fixing pin 82 to pass through. After the fixing pin 82 passes through both the collar 8 and the output shaft 11, both ends of the fixing pin 82 extend to the outside of the collar 8 and are inserted into the locking grooves 4131 of the corresponding locking blocks 413. This allows the fixing pin 82 to limit the rotor frame 41 while fixing the collar 8 and the output shaft 11.

[0055] When the rotor frame 41 needs to be disassembled separately, the operator pushes the locking block 413, causing it to slide away from the fixing pin 82, overcoming the elastic force of the fourth elastic element 414. The locking groove 4131 separates from the end of the fixing pin 82, and the end of the fixing pin 82 corresponds to the through groove 412. Then, the rotor frame 41 is pulled upward, and both ends of the fixing pin 82 pass through the through groove 412, allowing the rotor frame 41 to be removed from the outside of the collar 8. At this time, the fixing pin 82 still passes through the collar 8 and the output shaft 11, the collar 8 remains fixed on the output shaft 11, the connecting plate 7 remains in the downward position, and the mounting blocks 22 of the three magnetorheological dampers 5 remain locked. If it is necessary to further disassemble the collar 8 or release the mounting blocks 22 of the three magnetorheological dampers 5, after the rotor frame 41 is removed, pull out the fixing pin 82, and then pull the collar 8 upward. The collar 8 will drive the connecting plate 7 to move upward through the telescopic rod 9 and the retaining ring 72. The connecting plate 7 will drive the three drive rods 331 to move upward synchronously. The limiting block 31 will exit the limiting hole 221 under the action of the first elastic element 32, and the fifth elastic element 23 will push the mounting block 22 upward out of the mounting groove 21.

[0056] The implementation principle of a centrifuge with mechanical linkage damping support in this application embodiment is as follows: When the centrifuge is running, the motor 1 drives the rotor assembly 4 to rotate. The sensor module 6 detects the vibration signal and speed signal of the motor 1. The control module adjusts the control current input to the three magnetorheological dampers 5 according to the detection signal, so that the three magnetorheological dampers 5 provide damping support between the motor base 2 and the shell that is adapted to the current operating state.

[0057] When assembling the magnetorheological damper 5, the mounting block 22 is inserted vertically into the mounting groove 21, the connecting plate 7 is pressed down, and the three limit blocks 31 are driven to be inserted into the limit holes 221 of the corresponding mounting block 22. Then the collar 8 is pressed down to fix the collar 8 on the output shaft 11 and press the connecting plate 7, so that the three drive rods 331 are kept in the downward state, and the synchronous locking between the three magnetorheological dampers 5 and the motor base 2 is completed.

[0058] During disassembly, the rotor frame 41 can be removed separately by using the locking block 413 and the through slot 412. Then, the fixing pin 82 is pulled out and the collar 8 is lifted. The collar 8 drives the connecting plate 7 to move upward, so that the three limiting devices 3 release the limiting of the mounting block 22 simultaneously. The mounting block 22 pops out of the mounting slot 21 under the action of the fifth elastic element 23, thereby completing the step-by-step disassembly of the rotor assembly 4, the collar 8 structure and the magnetorheological damper 5 mounting structure.

[0059] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A centrifuge with mechanical linkage damping support, comprising a housing, a motor (1), and a rotor assembly (4) fixedly connected to the output shaft (11) of the motor (1), characterized in that: Also includes: The motor mount (2) is fixed to the outer casing of the motor (1); Three magnetorheological dampers (5) are arranged in a circular array on the outer periphery of the motor (1). One end of each magnetorheological damper (5) is rotatably connected to the motor base (2), and the other end is rotatably connected to the centrifuge housing. The sensor module (6) is fixedly connected to the bottom of the motor (1) and is used to detect the vibration signal and speed signal of the motor (1); The control module is electrically connected to the sensor module (6) and the magnetorheological damper (5), and adjusts the control current of the input magnetorheological damper (5) according to the signal fed back by the sensor module (6).

2. The centrifuge with mechanical linkage damping support according to claim 1, characterized in that, The rotor assembly (4) includes a rotor frame (41), multiple hanging baskets (42) and a receiving cylinder (43); the rotor frame (41) is fixedly connected to the output shaft (11) of the motor (1), the multiple hanging baskets (42) are arranged in a circumferential array on the rotor frame (41), each hanging basket (42) has a hanging ear (421) at both ends, the rotor frame (41) has an opening slot (411) corresponding to the hanging ear (421), and the receiving cylinder (43) is placed inside the hanging basket (42).

3. A centrifuge with mechanical linkage damping support according to claim 2, characterized in that: The motor base (2) is provided with a mounting block (22) corresponding to each magnetorheological damper (5), and one end of the magnetorheological damper (5) is rotatably connected to the mounting block (22); the mounting block (22) is inserted vertically into the mounting groove (21) opened on the motor base (2); the motor base (2) is provided with a limiting device (3) corresponding to the mounting block (22) to limit the sliding of the mounting block (22) relative to the motor base (2).

4. The centrifuge with mechanical linkage damping support according to claim 3, characterized in that, The mounting block (22) has a limiting hole (221), and the limiting device (3) includes: The limiting block (31) is slidably disposed on the motor seat (2) along the radial direction of the output shaft (11) of the motor (1) and cooperates with the limiting hole (221); The first elastic element (32) is disposed on the motor base (2) and drives the limiting block (31) to slide away from the mounting block (22); A driving element (33) is disposed on the motor base (2) and is used to drive the limiting block (31) to slide toward the mounting block (22) against the elastic force of the first elastic element (32); The limiting block (31) has a locking position for inserting into the limiting hole (221) to lock the mounting block (22), and an unlocking position for exiting the limiting hole (221) to release the limiting of the mounting block (22).

5. A centrifuge with mechanical linkage damping support according to claim 4, characterized in that: The driving component (33) includes a driving rod (331), a driving block (332), and a guide wheel (333). The driving rod (331) is slidably mounted on the motor base (2) in the vertical direction. The driving block (332) is fixedly connected to the side of the driving rod (331) facing the limiting block (31). The driving block (332) is provided with a first guide slope (3321). The guide wheel (333) is rotatably connected to the end of the limiting block (31) facing the driving rod (331). When the driving rod (331) slides downward, the guide wheel (333) slides along the first guide slope (3321) to the side of the driving block (332) facing the limiting block (31). The limiting block (31) slides from the unlocked position to the locked position.

6. The centrifuge with mechanical linkage damping support according to claim 5, characterized in that, The tops of the drive rods (331) of the three limiting devices (3) are fixedly connected to the same connecting plate (7). The connecting plate (7) is annular and sleeved on the outside of the output shaft (11) of the motor (1), and is clearance-fitted with the output shaft (11). The top surface of the connecting plate (7) is provided with an annular groove (71). A collar (8) is detachably sleeved on the output shaft (11). When the collar (8) is fixed on the output shaft (11), the bottom surface of the collar (8) abuts against the groove (71) to keep the connecting plate (7) in a downward position.

7. The centrifuge with mechanical linkage damping support according to claim 6, characterized in that, The top of the output shaft (11) is provided with a tapered surface (111), and the top of the connecting plate (7) is provided with a retaining ring (72), which is located in the opening of the sink (71). At least two base plates (81) are fixedly connected to the outer circumferential surface of the collar (8), and a telescopic rod (9) is slidably connected in each base plate (81). A second elastic element (811) is provided in the base plate (81), which drives the telescopic rod (9) to slide toward the output shaft (11). The telescopic rod (9) has an extended position that extends out of the base plate (81) and is located below the retaining ring (72), and a retracted position that retracts into the base plate (81). The end of the telescopic rod (9) near the output shaft (11) abuts against the output shaft (11), and the tapered surface (111) is located on the abutment path when the telescopic rod (9) moves upward with the collar (8).

8. A centrifuge with mechanical linkage damping support according to claim 7, characterized in that: The telescopic rod (9) includes: The rod (91) is slidably connected to the base plate (81), and the second elastic element (811) acts between the rod (91) and the base plate (81); The abutment block (92) is slidably disposed at one end of the rod body (91) away from the output shaft (11). The bottom of the abutment block (92) is provided with a second guide slope (921), which is disposed toward the upper edge of the retaining ring (72). A third elastic element (93) is disposed inside the rod (91) to drive the abutment block (92) to slide toward the outside of the rod (91); When the third elastic element (93) is in its natural state, the abutment block (92) can extend under the retaining ring (72).

9. A centrifuge with mechanical linkage damping support according to claim 7, characterized in that: A fixing pin (82) is provided radially through the collar (8), and the fixing pin (82) passes through both the collar (8) and the output shaft (11) to fix the collar (8) to the output shaft (11).

10. The centrifuge with mechanical linkage damping support according to claim 9, characterized in that, The rotor frame (41) is sleeved on the outside of the collar (8), and the bottom of the rotor frame (41) abuts against the base plate (81). Locking blocks (413) are slidably connected to both ends of the rotor frame (41) corresponding to the fixing pin (82). The locking blocks (413) are provided with locking grooves (4131) for the ends of the fixing pin (82) to be inserted. The rotor frame (41) is provided with a fourth elastic element (414), which drives the locking blocks (413) to slide toward the fixing pin (82). The rotor frame (41) is also provided with through grooves (412) for the ends of the fixing pin (82) to pass through.

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