Magnetic levitation single-pulse type impact torsion test equipment

Abstract

The application discloses a magnetic suspension single-pulse impact torsion test equipment, which comprises an energy storage and release device, an impact device, an incident rod and a transmission rod, the energy storage device is arranged at a torque power input end of the impact device and provides torque power for the impact device, the impact device is arranged at a power input end of the incident rod and drives the incident rod to rotate, the transmission rod is arranged at a tail end of the incident rod, and a sample is arranged between the transmission rod and the incident rod, and a supporting and centering device is further arranged at the lower side of the incident rod and the transmission rod, the energy storage and release function of the equipment is effectively optimized through the arrangement of the energy storage and release device, the impact device and the supporting and centering device, the influence of friction on the torque wave is reduced, the torque wave transmitted to the sample is purer, and the equipment has the characteristics of high test result precision, novel structure design and convenient and fast use.

Description

Technical Field

[0001] This invention relates to experimental testing equipment for dynamic impact mechanics of rock materials, and more particularly to a magnetically levitated single-pulse impact torsion testing equipment. Background Technology

[0002] During the excavation and construction of underground engineering projects, rock mass engineering may encounter threats such as explosions and high-speed impacts with high strain rate. Therefore, studying the mechanical response of rock materials under impact loading will help the development and construction of underground rock mass engineering. In order to study the shear resistance of rock under high strain rate conditions, pre-storage type split Hopkinson torsion bar has emerged.

[0003] Pre-stored split Hopkinson torsion bars have many advantages over other types of split Hopkinson torsion bars, such as simple mechanical structure and convenient operation, but they also have many disadvantages. In 2015, Fang Qin, Jiang Xiquan, and others invented a flywheel-type Hopkinson torsion bar device (CN105181486A) to address the problems of pre-stored split Hopkinson torsion bars. This device uses a rotary drive to drive an active flywheel to rotate. The active flywheel attracts a ferromagnetic flywheel through an electromagnetic attraction device, thereby driving the ferromagnetic flywheel to rotate, achieving the purpose of energy storage. During energy release, the flange connected to the incident rod attracts the ferromagnetic flywheel to the flange through an electromagnetic attraction device. The high-speed rotating ferromagnetic flywheel drives the flange to rotate, thereby achieving the purpose of energy release. However, this device still has the following defects:

[0004] 1. The ferromagnetic flywheel and the flange are attracted by the electromagnetic attraction device, and then the torque is transmitted through the friction plate. During the friction process, a lot of torque may be lost, and it cannot be guaranteed that the torque transmitted to the flange is equivalent to the pre-intended torque.

[0005] 2. The ferromagnetic flywheel is attracted to the flange by a magnetic attraction device. During this process, the ferromagnetic flywheel strikes the flange, which will exert an axial compression effect on the sample, making the torsional wave impure and producing noise.

[0006] 3. After the ferromagnetic flywheel has been attached to the flange for a period of time, it is attracted by the electromagnetic attraction device on the drive flywheel. During this time, the electromagnetic flywheel transmits torque to the flange, but does not leave in time. At this time, the electromagnetic flywheel will have a secondary effect on the flange, which will lead to experimental errors.

[0007] 4. Traditional Hopkinson torsion bars use mechanical bearings for their support devices. These bearings have high friction, which can cause some loss to the torque wave.

[0008] Therefore, there is an urgent need to design a magnetically levitated single-pulse impact torsion testing device to solve the problems existing in the above-mentioned technologies. Summary of the Invention

[0009] To address the aforementioned problems, this invention aims to provide a magnetically levitated single-pulse impact torsion testing device. This device effectively optimizes the energy storage and release functions of the equipment through the setting of an energy storage and release device, an impact device, and a support and centering device. At the same time, it reduces the influence of friction on the torque wave, making the torque wave transmitted to the sample purer. It features high test result accuracy, novel structural design, and convenient and quick use.

[0010] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0011] A magnetically levitated single-pulse impact-torsion testing device includes an energy storage and release device, an impact device, an incident rod, and a transmission rod.

[0012] The energy storage device is installed at the torque power input end of the impact device to provide torque power to the impact device;

[0013] The impact device is located at the power input end of the incident rod and is used to release the energy of the energy storage and release device, thereby driving the incident rod to rotate.

[0014] The transmission rod is located at the end of the incident rod, and a connecting mechanism is provided at the ends of both the transmission rod and the incident rod. The connecting mechanism is used in conjunction with the sample to install the sample between the transmission rod and the incident rod.

[0015] The incident rod and the transmission rod are also provided with a support and centering device on their lower sides.

[0016] Preferably, the energy storage and release device includes a frame, and a flywheel, a valve, and a release transmission component mounted on the frame.

[0017] The flywheel is positioned between the first and second bearings on the frame, with one end of the flywheel inserted into the first bearing and connected to the drive motor. A volute groove is provided on the flywheel, which works in conjunction with the valve.

[0018] The release transmission component is disposed in the second bearing via a first contact, and a first pin and a second pin are provided on the release transmission component to cooperate with the valve. The release transmission component is also used in conjunction with the impact device.

[0019] Preferably, the second bearing is provided with a positioning cavity, the first contact is movably disposed in the positioning cavity, and a first spring is provided at the tail of the first contact to cooperate with the first contact. The first contact is also used in conjunction with a positioning groove provided on the side wall of the release transmission component, and the positioning groove is connected to a third mounting hole provided on the release transmission component.

[0020] Preferably, a first pin is provided in the third mounting hole, the circular pin of the first pin is movably installed in the third mounting hole, the irregularly shaped clip of the first pin is engaged in the positioning groove, and the outer side of the irregularly shaped clip is an inclined surface that cooperates with the first contact. The tail end of the circular pin is provided with a mounting groove, which cooperates with the second spring provided at the bottom of the third mounting hole. The front end of the circular pin also cooperates with the inner side of the valve.

[0021] Preferably, the end of the release transmission component is further provided with a first mounting hole, a head protrusion, and a positioning shaft.

[0022] A second pin is provided in the first mounting hole. The second pin is movably installed in the first mounting hole. An electromagnet is provided at the bottom of the first mounting hole to cooperate with the tail of the second pin. The front end of the second pin cooperates with the first positioning hole provided on the valve.

[0023] The head protrusion is located at the center of the end of the release transmission component, and leg rods are symmetrically installed in the opening of the head protrusion. The end of the leg rod is equipped with a positioning wheel, and the positioning wheel abuts against the valve.

[0024] The positioning shaft is symmetrically arranged at the end of the release transmission component and is used in conjunction with the second positioning hole provided on the valve.

[0025] Preferably, the impact device includes a first transmission component, a second transmission component, a first levitation magnetic bearing, and a drive assembly.

[0026] The first transmission component is installed in the third bearing on the frame, and an internal thread is provided in the first transmission component to cooperate with the external thread provided on the front end rod of the release transmission component.

[0027] The second transmission component is disposed outside the first transmission component, and a protrusion is provided on the second transmission component to cooperate with the groove provided on the first transmission component. A limit slot is symmetrically provided inside the second transmission component, and the limit slot cooperates with the limit block provided at the end of the release transmission component.

[0028] The first levitation magnetic bearing is mounted on the frame, the incident rod passes through the first levitation magnetic bearing, the drive kit is mounted at the end of the incident rod, and works in conjunction with the drive column mounted on the second transmission component.

[0029] Preferably, the outer side of the first transmission component is further provided with a first positioning clip, which is used in conjunction with a first positioning slot provided on the inner ring of the third bearing; and the stator of the first levitation magnetic bearing is coaxial with the third bearing.

[0030] Preferably, the support and centering device includes a bracket, and a second magnetic levitation bearing, a moving block, a positioning plate, and an adjusting screw mounted on the bracket.

[0031] The positioning plates are symmetrically arranged in the movable slots on the bracket and can be translated along the movable slots;

[0032] The movable block is installed between two symmetrically arranged positioning plates, and a screw-in traction component is also provided at the end of the positioning plate. The screw-in traction component is used in conjunction with the adjusting screw.

[0033] The second magnetic levitation bearing is located on the top of the moving block and is used in conjunction with the incident rod and the transmission rod.

[0034] Preferably, the connecting mechanism includes a threaded collar, a pressure ring, a circular mounting component, and a sample limiting component.

[0035] The threaded collar has an internal thread that engages with an external thread on a circular mounting piece, and a groove is provided at the front end of the threaded collar that engages with a convex ring on a top pressure ring.

[0036] The top pressure ring is movably sleeved on the mounting component. The top pressure ring has a limiting protrusion inside that works in conjunction with a limiting groove on the mounting component. The top pressure ring is also connected to the sample limiting component.

[0037] One end of the mounting component is connected to the transmission rod and the incident rod, and the other end is a hollow end, with several slots provided on the side wall of the hollow end.

[0038] The sample limiting component includes a connecting rod and a limiting wheel. The connecting rod is rotatably connected to the top pressure ring, and the limiting wheel is located at the other end of the connecting rod and moves along the groove provided on the mounting component.

[0039] Preferably, the top pressure ring end is provided with a plurality of limiting member mounting grooves, and one end of the connecting rod is rotatably mounted in the limiting member mounting groove;

[0040] The limiting wheel is mounted on the other end of the connecting rod via a third pin, and the third pin is used in conjunction with the guide grooves provided on the side walls of the slot. The guide grooves are inclined along the length of the mounting component.

[0041] Preferably, the method of using the magnetically levitated single-pulse impact torsion testing equipment includes:

[0042] Step 1: Before use, first install the incident rod and the transmission rod inside the second magnetic levitation bearing of the bracket. After the incident rod and the transmission rod are installed, power is applied to the second magnetic levitation bearing. Since all rotors are on the same axis, all stators will move towards the axis through the action of magnetic force. The stator of the first second magnetic levitation bearing is fixed on the frame. The axis of all stators will be collinear with the axis of the first stator, and finally the centering is achieved. Finally, rotate the screw to make the positioning plate clamp the moving block under the bearing and fix the moving block.

[0043] Step Two: During the experiment, the process includes energy storage and energy release.

[0044] During energy storage: the first mounting hole of the release transmission component is coaxial with the first positioning hole of the valve, the second pin extends out of the first mounting hole, preventing the valve from rotating, the drive motor is started, and the flywheel rotates at high speed. When the speed of the flywheel reaches the predetermined speed, the motor is de-energized.

[0045] When releasing energy: the second control pin retracts into the first mounting hole. At this time, the valve is ejected by the force of the second spring and enters the volute groove of the flywheel. When the flywheel rotates to the point where the volute groove is fully coupled with the valve, the valve is fully ejected. At this time, the third positioning hole of the valve is coaxial with the third mounting hole of the release transmission component. The first pin is ejected from the third mounting hole by the force of the second spring, pushing the first contact out of the positioning groove. At this time, the release transmission component can rotate freely, and the flywheel transmits torque to the release transmission component through the valve.

[0046] Step 3: When the flywheel transmits torque to the release transmission component through the valve, the release transmission component rotates. When the release transmission component rotates, the drive assembly and the drive column collide with each other, driving the incident rod to rotate, and the torque is measured using the sample. At the same time, after the collision, the release transmission component drives the first transmission component to move to the left until it disengages from the third bearing, completing one torque measurement process.

[0047] The beneficial effects of this invention are: This invention discloses a magnetically levitated single-pulse impact torsion testing equipment. Compared with the prior art, the improvement of this invention lies in:

[0048] This invention designs a magnetically levitated single-pulse impact-torsion testing equipment, including an energy storage and release device, an impact device, and a support and alignment device. In use:

[0049] 1. By optimizing the flywheel, the flywheel transmits torque to the release transmission component through a flap during use. Before energy release, the release transmission component is locked to ensure that it is not affected by friction between the flywheel and other parts, thus achieving precise torque release and ensuring the accuracy of torque test experiments.

[0050] 2. At the same time, the design of the impact device minimizes the impact of the energy storage and release device on the subsequent devices, making the torque wave transmitted to the sample purer;

[0051] 3. This equipment reduces the impact of frictional resistance on the torque wave by using magnetic levitation bearings, effectively ensuring the purity of the torque wave and thus ensuring the accuracy of the torque test experiment;

[0052] 4. The centering device of this equipment utilizes the characteristics of magnetic levitation bearings to design the support frame and achieve automatic centering.

[0053] 5. Through the connection mechanism, this equipment can fix the sample during use, allowing the sample to be twisted during the experiment. It has the advantages of high test accuracy, novel structural design and convenient and quick use. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of the structure of the magnetic levitation single-pulse impact torsion testing equipment of the present invention.

[0055] Figure 2 This is a schematic diagram of the energy storage and release device of the present invention.

[0056] Figure 3 This is an exploded view of the energy storage and release device of the present invention.

[0057] Figure 4 This is a schematic diagram of the structure of the valve of the present invention.

[0058] Figure 5 This is a schematic diagram of the structure of the transmission component of the present invention.

[0059] Figure 6 This is a schematic diagram of the structure of the first pin of the present invention.

[0060] Figure 7 This is a structural diagram of the flywheel installation of the present invention.

[0061] Figure 8 This is an exploded view of the flywheel assembly of the present invention.

[0062] Figure 9 This is a schematic diagram of the impact device of the present invention.

[0063] Figure 10 This is an exploded view of the impact device of the present invention.

[0064] Figure 11 This is a schematic diagram of the structure of the centering device of the present invention.

[0065] Figure 12 This is an exploded view of the centering device supporting the present invention.

[0066] Figure 13 This is a diagram showing the installation effect of the sample of the present invention.

[0067] Figure 14 This is a schematic diagram of the connection mechanism of the present invention.

[0068] Figure 15 This is an exploded view of the connecting mechanism of the present invention.

[0069] Figure 16 This is a cross-sectional view of the connecting mechanism of the present invention.

[0070] Among them: 1. Energy storage and release device, 1-1. Flywheel, 1-1-1. Snail-shaped groove, 1-2. First contact, 1-3. Frame, 1-4. Valve, 1-4-1. First positioning hole, 1-4-2. Second positioning hole, 1-4-3. Third positioning hole, 1-5. First pin, 1-5-1. Mounting groove, 1-5-2. Second spring, 1-5-3. Circular pin, 1-5-4. Irregularly shaped clip, 1-6. Second pin shaft, 1-7. Positioning wheel, 1-8. Leg rod, 1-9. Release transmission component, 1-9-1. Positioning groove, 1-9-2. Front end rod, 1-9-3. Limiting block, 1-9-4. First mounting hole, 1-9-5. Third mounting hole, 1-9-6. Head protrusion, 1-9-7. Positioning shaft, 1-10. Third bearing, 1-11. Drive motor, 1-12. Second bearing, 1-12-1. Positioning cavity, 1-13. First bearing, 2. Impact device 2-1. First transmission component; 2-1-1. Inserted groove; 2-1-2. First positioning clip; 2-2. Second transmission component; 2-2-1. Limiting groove; 2-2-2. Protrusion; 2-2-3. Drive column; 2-3. First levitation magnetic bearing; 2-4. Drive assembly; 3. Support centering device; 3-1. Second magnetic levitation bearing; 3-2. Moving block; 3-3. Bracket; 3-3-1. Movable groove; 3-4. Positioning plate; 3-5. Adjusting screw. 4. Specimen, 5. Incident rod, 6. Transmission rod, 7. Connecting mechanism, 7-1. Threaded collar, 7-2. Top pressure ring, 7-2-1. Limiting protrusion, 7-2-2. Limiting component mounting groove, 7-3. Mounting component, 7-3-1. Limiting groove, 7-3-2. Slot, 7-3-3. Guide groove, 7-4. Specimen limiting component, 7-4-1. Connecting rod, 7-4-2. Rotating mounting component, 7-4-3. Limiting wheel, 7-4-4. Third pin. Detailed Implementation

[0071] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0072] Example 1: Refer to Appendix Figure 1-16The magnetically levitated single-pulse impact-torsion testing equipment shown includes an energy storage and release device 1, an impact device 2, an incident rod 5, and a transmission rod 6, wherein:

[0073] The energy storage device is installed at the torque power input end of the impact device 2 and is used to provide torque power to the impact device 2.

[0074] The impact device 2 is located at the power input end of the incident rod 5 and is connected to the incident rod 5. It is used to release the energy of the energy storage and release device 1 and drive the incident rod 5 to rotate.

[0075] The transmission rod 6 is located at the end of the incident rod 5, and a connecting mechanism 7 is provided at the ends of both the transmission rod 6 and the incident rod 5. The connecting mechanism 7 is used in conjunction with the sample 4 to install the sample 4 between the transmission rod 6 and the incident rod 5. When in use, the sample 4 is used to measure the magnitude of the torque wave.

[0076] Preferably, in order to achieve energy storage and precise energy release during use, the energy storage and release device 1 is designed to include a frame 1-3, and a flywheel 1-1, a valve 1-4, and a release transmission component 1-9 mounted on the frame 1-3, wherein...

[0077] The flywheel 1-1 is disposed between the first bearing 1-13 and the second bearing 1-12 on the frame 1-3, and the short shaft at one end of the flywheel 1-1 is inserted into the first bearing 1-13 of the frame 1-3. It is powered by the drive motor 1-11 through the first bearing 1-13. That is, when in use, the flywheel 1-1 is driven to rotate by the drive motor 1-11. A volute groove 1-1-1 is provided on the flywheel 1-1, and the volute groove 1-1-1 is used in conjunction with the valve 1-4.

[0078] The release transmission component 1-9 is installed in the second bearing 1-12 through the first contact 1-2, and a first pin 1-5 and a second pin 1-6 are provided on the release transmission component 1-9. The first pin 1-5 and the second pin 1-6 are used in conjunction with the valve 1-4. In use, the flywheel 1-1 transmits torque to the release transmission component 1-9 through the valve 1-4. The release transmission component 1-9 is also used in conjunction with the impact device 2 to release the torque and transmit the torque to the incident rod 5.

[0079] Preferably, in order to movably install the release transmission component 1-9 inside the second bearing 1-12, a positioning cavity 1-12-1 is provided on the outer ring of the second bearing 1-12. The first contact 1-2 is movably installed inside the positioning cavity 1-12-1, and a first spring is provided at the tail of the first contact 1-2 to reset the first contact 1-2. The front end of the first contact 1-2 also cooperates with the positioning groove 1-9-1 provided on the side wall of the release transmission component 1-9. That is, in use, the first contact 1-2 is used to fix the release transmission component 1-9, and the positioning groove 1-9-1 is connected to the third mounting hole 1-9-5 provided on the release transmission component 1-9.

[0080] Preferably, a first pin 1-5 is also installed in the third mounting hole 1-9-5. The circular pin 1-5-3 of the first pin 1-5 is movably installed in the third mounting hole 1-9-5. The irregularly shaped clip 1-5-4 of the irregular part is engaged in the positioning groove 1-9-1. The outer surface of the irregularly shaped clip 1-5-4 is an inclined surface that cooperates with the first contact 1-2. A mounting groove 1-5-1 is provided at the tail end of the circular pin 1-5-3. The mounting groove 1-5-1 cooperates with the second spring 1-5-2 provided at the bottom of the third mounting hole 1-9-5. The front end of the circular pin 1-5-3 also cooperates with the inner surface of the valve 1-4. In use, under the reset action of the second spring 1-5-2, the circular pin 1-5-3 pushes the valve 1-4 into the volute groove 1-1-1. Simultaneously, the first contact 1-2 is pushed out of the positioning groove 1-9-1. When the valve 1-4 enters the volute groove 1-1-1 of the flywheel 1-1, and the flywheel 1-1 rotates until the volute groove 1-1-1 is fully coupled with the valve 1-4, the valve 1-4 is just fully ejected. At this time, the third positioning hole 1-4-3 of the valve 1-4 is coaxial with the third mounting hole 1-9-5 of the release transmission component 1-9. The first pin 1-5 is ejected from the third mounting hole 1-9-5 due to the action of the second spring 1-5-2, squeezing the first contact 1-2 out of the positioning groove 1-9-1. At this time, the release transmission component 1-9 can rotate freely. The flywheel 1-1 transmits torque to the release transmission component 1-9 through the valve 1-4. Before energy release, the release transmission component 1-9 is locked, so the release transmission component 1-9 will not be affected by the friction between the flywheel 1-1 and other parts, thus achieving precise energy release.

[0081] Preferably, for the installation and fixation of the valve 1-4, a first mounting hole 1-9-4, a head protrusion 1-9-6, and a positioning shaft 1-9-7 are further provided at the end of the release transmission member 1-9, wherein...

[0082] A second pin 1-6 is installed in the first mounting hole 1-9-4. The second pin 1-6 is movably installed in the first mounting hole 1-9-4. An electromagnet is provided at the bottom of the first mounting hole 1-9-4 to cooperate with the tail of the second pin 1-6 to control the extension and retraction of the second pin 1-6. The front end of the second pin 1-6 cooperates with the first positioning hole 1-4-1 provided on the valve 1-4. During the energy storage process, the valve 1-4 is fixed by extending the second pin 1-6 out of the first mounting hole 1-9-4.

[0083] The head protrusion 1-9-6 is located at the center of the end of the release transmission component 1-9, and leg rods 1-8 are symmetrically installed in the opening of the head protrusion 1-9-6. A positioning wheel 1-7 is installed at the end of the leg rod 1-8. The positioning wheel 1-7 (which can push the valve 1-4 to extend out by setting the positioning wheel 1-7 and the leg rod 1-8) abuts against the valve 1-4 and is used to position the valve 1-4 during use.

[0084] The positioning shaft 1-9-7 is symmetrically arranged at the end of the release transmission component 1-9, and is used in conjunction with the second positioning hole 1-4-2 provided on the valve 1-4 to install the valve 1-4 so that the valve 1-4 can rotate about the positioning shaft 1-9-7.

[0085] The usage process and procedure of the energy storage and release device 1 described in this embodiment include:

[0086] Energy storage process and principle: When the device stores energy, the first mounting hole 1-9-4 of the release transmission component 1-9 is coaxial with the first positioning hole 1-4-1 of the valve 1-4. The second pin 1-6 extends out of the first mounting hole 1-9-4, preventing the valve 1-4 from rotating. The drive motor 1-11 is started, causing the flywheel 1-1 to rotate at high speed. When the speed of the flywheel 1-1 reaches the predetermined speed, the motor is de-energized, controlling the second pin 1-6 to retract into the first mounting hole 1-9-4. At this time, the valve 1-4 is ejected by the elastic force of the second spring 1-5-2 and enters the volute groove 1-1-1 of the flywheel 1-1. When the flywheel 1-1 rotates until the volute groove 1-1-1 is fully coupled with the valve 1-4, the valve 1-4 is just... When fully ejected, the third positioning hole 1-4-3 of the valve 1-4 is coaxial with the third mounting hole 1-9-5 of the release transmission component 1-9. The first pin 1-5 is ejected from the third mounting hole 1-9-5 due to the action of the second spring 1-5-2, pushing the first contact 1-2 out of the positioning groove 1-9-1. At this time, the release transmission component 1-9 can rotate freely. The flywheel 1-1 transmits torque to the release transmission component 1-9 through the valve 1-4. Before energy release, the release transmission component 1-9 is locked, so it will not be affected by the friction between the flywheel 1-1 and other parts, thus achieving precise energy release. Then, the energy storage and release device 1 drives the impact device 2 to move, and the impact device 2 drives the incident rod 5 to rotate.

[0087] Example 2: Unlike Example 1, in order to accurately transmit torque to the incident rod 5 during use, the impact device 2 is designed to include a first transmission component 2-1, a second transmission component 2-2, a first levitation magnetic bearing 2-3, and a drive assembly 2-4, wherein...

[0088] The first transmission component 2-1 is installed inside the third bearing 1-10 on the frame 1-3, and an internal thread is provided on the inner side of the first transmission component 2-1 to cooperate with the external thread provided on the front end rod 1-9-2 of the release transmission component 1-9. That is, in use, the first transmission component 2-1 is screwed onto the front end rod 1-9-2. When the release transmission component 1-9 rotates, the first transmission component 2-1 moves to the left until it disengages from the third bearing 1-10.

[0089] The second transmission member 2-2 is disposed on the outside of the first transmission member 2-1, and a protrusion 2-2-2 is provided on the second transmission member 2-2. The protrusion 2-2-2 is disposed in the groove 2-1-1 disposed on the first transmission member 2-1. That is, in use, the first transmission member 2-1 and the second transmission member 2-2 are connected by embedding the protrusion 2-2-2 into the groove 2-1-1. At the same time, in order to facilitate the connection between the second transmission member 2-2 and the release transmission member 1-9, so that the release transmission member 1-9 can drive the second transmission member 2-2 to rotate in use, a limiting groove 2-2-1 is also symmetrically provided in the second transmission member 2-2. The limiting groove 2-2-1 is used in conjunction with the limiting block 1-9-3 disposed at the end of the release transmission member 1-9.

[0090] The first levitation magnetic bearing 2-3 is mounted on the frame 1-3 via a bearing seat, and the incident rod 5 passes through the first levitation magnetic bearing 2-3. The drive assembly 2-4 is located at the end of the incident rod 5 and works in conjunction with the drive column 2-2-3 located on the second transmission component 2-2. During use, under the impact and driving action of the drive assembly 2-4 and the drive column 2-2-3, the torque is transmitted to the incident rod 5 through the impact of the second transmission component 2-2 and the drive assembly 2-4. After the impact, the second transmission component 2-2 begins to decelerate and move to the left, no longer contacting the drive assembly 2-4, thus reducing disturbance and making the torque wave purer.

[0091] Preferably, in order to install the first transmission component 2-1 inside the third bearing 1-10, a first positioning clip 2-1-2 is also provided on the outside of the first transmission component 2-1. The first positioning clip 2-1-2 is used in conjunction with the first positioning groove 1-10-1 provided on the inner ring of the third bearing 1-10.

[0092] Preferably, to ensure the purity of torque transmission, the stator of the first levitation magnetic bearing 2-3 is designed to be coaxial with the third bearing 1-10.

[0093] The usage process and operating principle of the impact device 2 described in this embodiment include:

[0094] In use, when the flywheel 1-1 transmits torque to the release transmission component 1-9 through the valve 1-4, the release transmission component 1-9 rotates. When the release transmission component 1-9 rotates, the drive assembly 2-4 and the drive column 2-2-3 collide with each other, driving the incident rod 5 to rotate, and the torque is measured using the sample 4. At the same time, after the collision, the release transmission component 1-9 drives the first transmission component 2-1 to move to the left until it disengages from the third bearing 1-10, completing one torque measurement process.

[0095] Example 3: Unlike the above examples, in order to support the incident rod 5 and the transmission rod 6 during use, and to adjust their positions to achieve automated and adjustable automatic alignment of the incident rod 5 and the transmission rod 6, a support and alignment device 3 is also provided under the incident rod 5 and the transmission rod 6. The support and alignment device 3 includes a bracket 3-3, and a second magnetic levitation bearing 3-1, a moving block 3-2, a positioning plate 3-4, and an adjusting screw 3-5 mounted on the bracket 3-3.

[0096] The positioning plate 3-4 is a plate-shaped structure, symmetrically installed in the movable groove 3-3-1 on the bracket 3-3, and can be translated within the movable groove 3-3-1;

[0097] The movable block 3-2 is installed between two symmetrically arranged positioning plates 3-4, which clamp the movable block 3-2. A threaded traction component 3-6 can be detachably installed at the end of each positioning plate 3-4. The threaded traction component 3-6 works in conjunction with an adjusting screw 3-5. In use, the adjusting screw 3-5 is threadedly connected to the threaded traction component 3-6, and the external threads at both ends of the adjusting screw 3-5 are opposite in direction. During use, rotating the adjusting screw 3-5 causes the two positioning plates 3-4 to move towards or away from each other, thereby fixing the movable block 3-2.

[0098] The second magnetic levitation bearing 3-1 is located on the top of the moving block 3-2, and its inner rotor is used in conjunction with the incident rod 5 and the transmission rod 6. That is, after the bearing is energized, the rotor makes the axis of the second magnetic levitation bearing 3-1 collinear with the axis of the stator due to the magnetic force.

[0099] The usage process and operating principle of the support and alignment device 3 described in this embodiment include:

[0100] When setting up this device, since it is impossible to precisely position the support 3-3, the second magnetic levitation bearings 3-1 on the support 3-3 may not be on the same axis, resulting in experimental deviations. Therefore, when setting up the device, first roughly position the support 3-3, put all the rotors of the second magnetic levitation bearings 3-1 on a long straight rod, and then energize the second magnetic levitation bearings 3-1. Since all the rotors are on the same axis at this time, all the stators will move towards the axis through the action of magnetic force. Since the stator of the first second magnetic levitation bearing 3-1 is fixed on the frame 1-3, the axis of all the stators will be collinear with the axis of the first stator, and finally the centering is achieved. Finally, rotate the screw to make the positioning plate 3-4 clamp the moving block 3-2 below the bearing to achieve the fixing effect.

[0101] Example 4: Unlike the above examples, in order to achieve the connection and fixation of the sample 4 and enable the sample 4 to be subjected to torsion during the experiment, the connection mechanism 7 is designed to include a threaded collar 7-1, a top pressure ring 7-2, a circular mounting part 7-3, and a sample limiting part 7-4, wherein...

[0102] The threaded collar 7-1 is engraved with an internal thread, which is used in conjunction with the external thread on the circular mounting part 7-3. The front end of the threaded collar 7-1 is provided with a groove, which is used in conjunction with the convex ring on the top pressure ring 7-2. In use, the top pressure ring 7-2 is pushed to move along the length direction of the mounting part 7-3 by screwing in the threaded collar 7-1.

[0103] The top pressure ring 7-2 is movably sleeved on the mounting part 7-3, and a limiting protrusion 7-2-1 is provided inside the top pressure ring 7-2. The limiting protrusion 7-2-1 is used in conjunction with the limiting groove 7-3-1 provided on the outside of the mounting part 7-3. In use, under the pushing action of the threaded collar 7-1, the limiting protrusion 7-2-1 moves along the limiting groove 7-3-1, and the end of the top pressure ring 7-2 is connected to the sample limiting part 7-4. The movement of the top pressure ring 7-2 pushes the sample limiting part 7-4 to move.

[0104] One end of the mounting component 7-3 is fixedly connected to the transmission rod 6 and the incident rod 5, and the other end is a hollow end, with several slots 7-3-2 provided on the side wall of the hollow end;

[0105] The sample limiting component 7-4 includes a connecting rod 7-4-1 and a limiting wheel 7-4-3. The connecting rod 7-4-1 is rotatably connected to the top pressure ring 7-2. The limiting wheel 7-4-3 is located at the other end of the connecting rod 7-4-1 and moves along the slot 7-3-2 on the mounting component 7-3 to compress and limit the sample 4, thus fixing the sample 4.

[0106] Preferably, for connection with the sample limiting member 7-4, a plurality of limiting member mounting grooves 7-2-2 are provided at the end of the top pressure ring 7-2. One end of the connecting rod 7-4-1 is provided with a rotating mounting member 7-4-2. The rotating mounting member 7-4-2 cooperates with the limiting member mounting groove 7-2-2 to rotatably mount the connecting rod 7-4-1 at the end of the top pressure ring 7-2. The limiting wheel 7-4-3 is mounted on the other end of the connecting rod 7-4-1 through a third pin 7-4-4 and slides along the slot 7-3-2. The third pin 7-4-4 cooperates with the guide grooves 7-3-3 provided on both sides of the slot 7-3-2 to guide the movement of the limiting wheel 7-4-3.

[0107] Preferably, in order to accommodate the fixing of specimens 4 of different diameters, the guide groove 7-3-3 is designed to be inclined on the mounting part 7-3 along the length direction of the mounting part 7-3.

[0108] The usage process and operating principle of the connecting mechanism 7 described in this embodiment include:

[0109] In use, first insert the sample 4 into the round hole at the end of the mounting part 7-3, then rotate the threaded collar 7-1 to drive the top pressure ring 7-2 to move horizontally. The top pressure ring 7-2 then pushes the sample limiting part 7-4 to move, so that the limiting wheel 7-4-3 slides in the slot 7-3-2. Under the guidance and limiting action of the guide groove 7-3-3, the limiting wheel 7-4-3 is pressed tightly on the sample 4, thereby achieving the function of fixing the sample. It is convenient to install and disassemble, and can realize the quick fixing and installation of the sample 4.

[0110] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A magnetically levitated single-pulse impact-torsion testing device, characterized in that: Includes energy storage and release devices, impact devices, incident rods, and transmission rods. The energy storage device is installed at the torque power input end of the impact device to provide torque power to the impact device; The impact device is located at the power input end of the incident rod and is used to release the energy of the energy storage and release device, thereby driving the incident rod to rotate. The transmission rod is located at the end of the incident rod, and a connecting mechanism is provided at the ends of both the transmission rod and the incident rod. The connecting mechanism is used in conjunction with the sample to install the sample between the transmission rod and the incident rod. A support and centering device is also provided on the lower side of the incident rod and the transmission rod; The energy storage and release device includes a frame, and a flywheel, a valve, and a release transmission component mounted on the frame. The flywheel is positioned between the first and second bearings on the frame, with one end of the flywheel inserted into the first bearing and connected to the drive motor. A volute groove is provided on the flywheel, which works in conjunction with the valve. The release transmission component is disposed in the second bearing via a first contact, and a first pin and a second pin are provided on the release transmission component to cooperate with the valve. The release transmission component is also used in conjunction with the impact device. The second bearing is provided with a positioning cavity, the first contact is movably disposed in the positioning cavity, and a first spring is provided at the tail of the first contact to cooperate with the first contact. The first contact is also cooperated with a positioning groove provided on the side wall of the release transmission component, and the positioning groove is connected to a third mounting hole provided on the release transmission component. The impact device includes a first transmission component, a second transmission component, a first levitation magnetic bearing, and a drive assembly. The first transmission component is installed in the third bearing on the frame, and an internal thread is provided in the first transmission component to cooperate with the external thread provided on the front end rod of the release transmission component. The second transmission component is disposed outside the first transmission component, and a protrusion is provided on the second transmission component to cooperate with the groove provided on the first transmission component. A limit slot is symmetrically provided inside the second transmission component, and the limit slot cooperates with the limit block provided at the end of the release transmission component. The first levitation magnetic bearing is mounted on the frame, the incident rod passes through the first levitation magnetic bearing, and the drive kit is mounted at the end of the incident rod and works in conjunction with the drive column mounted on the second transmission component. The aforementioned support and centering device includes a bracket, and a second magnetic levitation bearing, a moving block, a positioning plate, and an adjusting screw mounted on the bracket. The positioning plates are symmetrically arranged in the movable slots on the bracket and can be translated along the movable slots; The movable block is installed between two symmetrically arranged positioning plates, and a screw-in traction component is also provided at the end of the positioning plate. The screw-in traction component is used in conjunction with the adjusting screw. The second magnetic levitation bearing is located on the top of the moving block and is used in conjunction with the incident rod and the transmission rod.

2. The magnetically levitated single-pulse impact torsion testing equipment according to claim 1, characterized in that: A first pin is provided in the third mounting hole. The circular pin of the first pin is movably installed in the third mounting hole. The irregularly shaped clip of the first pin is engaged in the positioning groove. The outer side of the irregularly shaped clip is an inclined surface that cooperates with the first contact. The tail end of the circular pin is provided with a mounting groove. The mounting groove cooperates with the second spring provided at the bottom of the third mounting hole. The front end of the circular pin also cooperates with the inner side of the valve.

3. The magnetic levitation single-pulse impact torsion testing equipment according to claim 1, characterized in that: The end of the release transmission component is also provided with a first mounting hole, a head protrusion, and a positioning shaft. A second pin is provided in the first mounting hole. The second pin is movably installed in the first mounting hole. An electromagnet is provided at the bottom of the first mounting hole to cooperate with the tail of the second pin. The front end of the second pin cooperates with the first positioning hole provided on the valve. The head protrusion is located at the center of the end of the release transmission component, and leg rods are symmetrically installed in the opening of the head protrusion. The end of the leg rod is equipped with a positioning wheel, and the positioning wheel abuts against the valve. The positioning shaft is symmetrically arranged at the end of the release transmission component and is used in conjunction with the second positioning hole provided on the valve.

4. The magnetically levitated single-pulse impact torsion testing equipment according to claim 1, characterized in that: The first transmission component is further provided with a first positioning clip on its outer side, which is used in conjunction with a first positioning slot provided on the inner ring of the third bearing; and the stator of the first levitation magnetic bearing is coaxial with the third bearing.

5. The magnetically levitated single-pulse impact torsion testing equipment according to claim 1, characterized in that: The connecting mechanism includes a threaded collar, a pressure ring, a circular mounting component, and a sample limiting component. The threaded collar has an internal thread that engages with an external thread on a circular mounting piece, and a groove is provided at the front end of the threaded collar that engages with a convex ring on a top pressure ring. The top pressure ring is movably sleeved on the mounting component. The top pressure ring has a limiting protrusion inside that works in conjunction with a limiting groove on the mounting component. The top pressure ring is also connected to the sample limiting component. One end of the mounting component is connected to the transmission rod and the incident rod, and the other end is a hollow end, with several slots provided on the side wall of the hollow end. The sample limiting component includes a connecting rod and a limiting wheel. The connecting rod is rotatably connected to the top pressure ring, and the limiting wheel is located at the other end of the connecting rod and moves along the groove provided on the mounting component.

6. The magnetically levitated single-pulse impact torsion testing equipment according to claim 5, characterized in that: The top pressure ring is provided with several limiting component mounting slots at its end, and one end of the connecting rod is rotatably mounted in the limiting component mounting slot; The limiting wheel is mounted on the other end of the connecting rod via a third pin, and the third pin is used in conjunction with the guide grooves provided on the side walls of the slot. The guide grooves are inclined along the length of the mounting component.

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