Double screw extruder overload disengaging magnetic coupling

Abstract

The application discloses a kind of overload disengagement magnetic coupling of double-screw extruder, specifically relates to coupling technical field, including outer magnetic rotor, the inside of outer magnetic rotor is equipped with continuous shaft sleeve, the side of continuous shaft sleeve is equipped with inner magnetic rotor;Sleeve joint block is arranged on the outer wall of continuous shaft sleeve, isolation piece is installed on sleeve joint block, and isolation cover is installed at the top of sleeve joint block;Disengagement piece is arranged at the side of sleeve joint block.The application has the advantages that the outer magnetic rotor and the inner magnetic rotor are easily and automatically disengaged while effectively weakening the magnetic force, the coupling overload protection action is more time-saving and labor-saving, and more smooth, thereby solving the problems that the outer magnetic rotor and the inner magnetic rotor are difficult to be easily and automatically disengaged while effectively weakening the magnetic force under normal circumstances, the coupling overload disengagement is more time-consuming and labor-consuming, and difficult to be smooth.

Description

Technical Field

[0001] This invention relates to the field of coupling technology, and more specifically, to a magnetic coupling for overload disengagement in a twin-screw extruder. Background Technology

[0002] When using a twin-screw extruder, it needs to be connected via a magnetic coupling. The magnetic force transmits torque non-contactly, enabling power transmission in a sealed environment and effectively avoiding the leakage risk of traditional mechanical couplings.

[0003] Among the existing publicly available documents, patent publication number CN114810860A discloses an FCT magnetic coupling, a hub, a wheel assembly, and a bicycle. This technology replaces the traditional threaded coupling with a clearance-fit transmission structure. During operation, the FCT magnetic coupling dynamically fine-tunes its center position based on the engagement of the ratchet assembly's jack, ensuring that the transmission center of the internal teeth and jack is concentric with the transmission center of the external teeth and hub. This overcomes the limitation of thread manufacturing not being able to achieve concentricity, eliminates abnormal noise, and improves the user experience. However, this patent has the following problems.

[0004] When a twin-screw extruder is overloaded, it is often connected by a magnetic coupling. When the torque is too high, the outer and inner magnetic rotors will slip continuously, but the power transmission continues to be applied. At this time, the magnetic force between the two is strong, and the force required to separate them is extremely large. Axial separation faces many difficulties. Under normal circumstances, it is difficult to effectively weaken the magnetic force while allowing the outer and inner magnetic rotors to separate easily and automatically. Overloaded separation of the coupling is even more time-consuming and laborious, and it is difficult to be smooth. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides the following technical solution: a magnetic coupling for overload disengagement of a twin-screw extruder, comprising an outer magnetic rotor, wherein a connecting sleeve is provided inside the outer magnetic rotor, and an inner magnetic rotor is provided on one side of the connecting sleeve;

[0006] A socket block is disposed on the outer wall of the coupling sleeve, an isolation component is installed on the socket block, and an isolation cover is installed on the top of the socket block;

[0007] The detachment component is located on one side of the socket block;

[0008] Under overload conditions, the isolation component drives the sleeve block to move the isolation cover between the outer magnetic rotor and the inner magnetic rotor to isolate and weaken the magnetic force between them; the disengagement component drives the outer magnetic rotor to move along the axis of the connecting sleeve to disengage the outer magnetic rotor from the inner magnetic rotor.

[0009] In a preferred embodiment, both the outer magnetic rotor and the connecting sleeve are slidably connected to the isolation cover, and the sleeve block is fixedly connected to the isolation cover.

[0010] In a preferred embodiment, the isolation element includes:

[0011] A screw is threaded onto the inner wall of the sleeve block. A guide rod is provided below the screw, and the guide rod is fixedly connected to the connecting sleeve. The guide rod is used to guide the sliding of the sleeve block.

[0012] A motor is installed at one end of a screw, the outer wall of the motor is fixedly connected to a coupling sleeve, and the output end of the motor is fixedly connected to the screw. The motor is used to drive the screw to rotate.

[0013] A retaining ring is fixedly connected to one side of the isolation cover, and one side of the retaining ring is provided with a grooved ring;

[0014] Multiple ball bearing sleeves are fixedly connected to one side of the inner wall of the grooved ring, and each inner wall of the grooved ring is rotatably fitted with balls;

[0015] The flange cover is fixedly connected to the inner wall of the groove ring;

[0016] The bushing plate is fixedly installed at one end of the flange cover.

[0017] In a preferred embodiment, the thickness of the insert ring is less than the thickness of the isolation cover, and both the insert ring and the isolation cover have annular vertical cross-sectional shapes.

[0018] In a preferred embodiment, the center point of the grooved ring and the center point of the ball are on the same horizontal line.

[0019] In a preferred embodiment, a battery is provided on one side of the motor, a wireless controller is mounted on the upper surface of the battery, the motor is electrically connected to the wireless controller, and the battery is fixedly connected to the coupling sleeve.

[0020] In a preferred embodiment, the disengagement member includes:

[0021] A sleeve frame is fixedly connected to one side of the sleeve block, and a servo motor is installed inside the sleeve frame;

[0022] A shaft is mounted on the output end of a servo motor, which drives the shaft to rotate.

[0023] An oblique sleeve is fixedly connected to the outer wall of the shaft. Two sleeves are fixed at one end of the outer magnetic rotor, and a moving column is fixed at the bottom of the inner wall of one of the sleeves.

[0024] A guide post is installed on the inner wall of the sleeve frame. The guide post is used to guide the sliding of the sleeve frame. A support frame is installed at one end of the guide post. Both the coupling sleeve and the guide post are fixedly connected to the support frame.

[0025] A spring is disposed on the outer wall of the guide post and located on one side of the socket bracket, the spring being used to provide elastic force to the socket bracket.

[0026] In a preferred embodiment, the two sockets are arranged in a circumferential distribution, and the support frame is slidably connected to the sockets.

[0027] In a preferred embodiment, the top surface of the moving column is at the same horizontal plane as the upper surface of the inclined sleeve, and the cross-sectional shape of the moving column is circular.

[0028] In a preferred embodiment, a twin-screw drive shaft is inserted into the inner wall of the inner magnetic rotor, and a drive shaft is inserted into the inner wall of the coupling sleeve.

[0029] The technical effects and advantages of the present invention.

[0030] 1. This invention employs an isolating element and a disengaging element. When the twin-screw extruder is overloaded, the isolating element drives the sleeve block to move the isolating cover between the outer magnetic rotor and the inner magnetic rotor. The magnetic shielding material of the isolating cover effectively weakens the magnetic force between the two. Then, the disengaging element drives the outer magnetic rotor to move axially along the coupling sleeve. While effectively weakening the magnetic force, the outer magnetic rotor and the inner magnetic rotor are easily and automatically disengaged. The overload protection action of the coupling is more time-saving, labor-saving, and smoother.

[0031] 2. This invention uses a motor to drive the screw to rotate, which in turn moves the sleeve block to the left along the guide rod, allowing the isolation cover to be precisely inserted between the outer magnetic rotor and the inner magnetic rotor. At the same time, the ball bearings in the insertion ring and the groove ring roll and cooperate to ensure that the isolation cover moves smoothly and stably. The isolation cover adopts a composite structure of low carbon steel and permalloy, which can effectively shield the magnetic force and create favorable conditions for subsequent disengagement, significantly improving the reliability and response speed of overload disengagement.

[0032] 3. This invention uses a servo motor to drive the inclined sleeve to rotate and press the moving column, which in turn moves the coupling frame and the outer magnetic rotor along the axial direction of the guide column. A spring provides auxiliary elastic force, enabling the outer magnetic rotor to quickly and smoothly separate from the inner magnetic rotor. The entire disengagement process is highly automated, requiring no manual intervention. Furthermore, the wireless controller and battery rotate with the coupling sleeve, achieving self-powered control and significantly improving the intelligence of the coupling's overload protection. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the main structure of the overload disconnect magnetic coupling for twin-screw extruders according to the present invention.

[0034] Figure 2 This is a schematic diagram of the vertical cross-section of the overload disconnect magnetic coupling for twin-screw extruders according to the present invention.

[0035] Figure 3This is a partial structural diagram of the vertical cross-section of the connection between the isolation cover and the sleeve block of the present invention.

[0036] Figure 4 This is a partial structural diagram of the vertical cross-section of the connection between the isolation cover and the insertion ring of the present invention.

[0037] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle.

[0038] Figure 6 This is a partial structural diagram of the vertical cross-section of the connection between the sleeve bracket and the servo motor of the present invention.

[0039] Figure 7 This is a schematic diagram of a partial cross-sectional section of the oblique sleeve and moving column of the present invention.

[0040] Figure 8 This is a partial structural diagram of the vertical cross-section of the socket frame of the present invention.

[0041] Figure 9 This is a partial structural diagram of the vertical cross-section of the connection between the coupling sleeve and the support frame of the present invention.

[0042] The attached diagram is labeled as follows: 1. Outer magnetic rotor; 2. Coupling sleeve; 3. Inner magnetic rotor; 4. Sleeve block; 5. Isolation cover; 6. Screw; 7. Guide rod; 8. Motor; 9. Insert ring; 10. Grooved ring; 11. Shaft ball sleeve; 12. Ball; 13. Battery; 14. Wireless controller; 15. Sleeve bracket; 16. Servo motor; 17. Shaft body; 18. Slanted sleeve; 19. Sleeve bracket; 20. Moving column; 21. Guide column; 22. Spring; 23. Support frame; 24. Flange cover; 25. Shaft sleeve plate; 26. Twin screw drive shaft; 27. Drive shaft. Detailed Implementation

[0043] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0044] Example 1:

[0045] In this embodiment, as Figure 1 - Figure 3 The magnetic coupling for overload disengagement of a twin-screw extruder shown includes an outer magnetic rotor 1, a coupling sleeve 2 inside the outer magnetic rotor 1, an inner magnetic rotor 3 on one side of the coupling sleeve 2; a sleeve block 4 disposed on the outer wall of the coupling sleeve 2, an isolation component installed on the sleeve block 4, and an isolation cover 5 installed on the top of the sleeve block 4; a disengagement component disposed on one side of the sleeve block 4, both the outer magnetic rotor 1 and the coupling sleeve 2 are slidably connected to the isolation cover 5, and the sleeve block 4 and the isolation cover 5 are fixedly connected.

[0046] The operating principle of this embodiment is as follows: under overload conditions, the isolation component drives the sleeve block 4 to move the isolation cover 5 between the outer magnetic rotor 1 and the inner magnetic rotor 3 to isolate and weaken the magnetic force between them; the disengagement component drives the outer magnetic rotor 1 to move along the axis of the coupling sleeve 2, so that the outer magnetic rotor 1 and the inner magnetic rotor 3 are disengaged. This effectively weakens the magnetic force while allowing the outer magnetic rotor 1 and the inner magnetic rotor 3 to easily and automatically disengage. The overload disengagement of the coupling is more time-saving, labor-saving, and smoother.

[0047] Example 2:

[0048] In this embodiment, as Figure 3 - Figure 5 As shown, the isolation components include: a screw 6, threadedly connected to the inner wall of the sleeve block 4, with a guide rod 7 below the screw 6, the guide rod 7 being fixedly connected to the coupling sleeve 2, and the guide rod 7 guiding the sliding of the sleeve block 4; a motor 8, installed at one end of the screw 6, with its outer wall fixedly connected to the coupling sleeve 2, and its output end fixedly connected to the screw 6, the motor 8 driving the screw 6 to rotate; a retaining ring 9, fixedly connected to one side of the isolation cover 5, with a grooved ring 10 aligned on one side of the retaining ring 9; multiple ball bearing sleeves 11, all fixedly connected to one side of the inner wall of the grooved ring 10, with a ball bearing 12 rollingly mounted on the inner wall of each grooved ring 10; a flange cover 24, fixedly connected to the inner wall of the grooved ring 10; and a bushing plate 25, fixedly installed at one end of the flange cover 24. The thickness of the retaining ring 9 is less than the thickness of the isolation cover 5, and both the retaining ring 9 and the isolation cover 5 have annular vertical cross-sectional shapes. The center point of the grooved ring 10 and the center point of the ball bearing 12 are on the same horizontal line. A battery 13 is provided on one side of the motor 8, and a wireless controller 14 is installed on the upper surface of the battery 13. The motor 8 and the wireless controller 14 are electrically connected, and the battery 13 is fixedly connected to the coupling sleeve 2.

[0049] The operating principle of this embodiment is as follows: Under overload conditions, the outer magnetic rotor 1 continuously drives the inner magnetic rotor 3 magnetically. However, the inner magnetic rotor 3 becomes difficult to drive after being overloaded, resulting in slippage between the outer magnetic rotor 1 and the inner magnetic rotor 3. Immediately, the motor 8 is started via the wireless controller 14, and the battery 13 powers both the wireless controller 14 and the motor 8. The motor 8 drives the screw 6 to rotate, and the screw 6 causes the sleeve block 4 to move to the left under the action of the threaded engagement force. The sleeve block 4 is guided to the left along the outer wall of the guide rod 7, causing the isolation cover 5 to move to the left. The isolation cover 5 moves to the left along the space between the outer magnetic rotor 1 and the coupling sleeve 2, and the isolation cover 5 causes the insertion ring 9 to move to the left. The insert ring 9 is inserted into the grooved ring 10, and the left side of the insert ring 9 contacts the circular surface of the ball 12. In this way, the bushing plate 25 supports the flange cover 24, the flange cover 24 supports the grooved ring 10, the grooved ring 10 supports the ball sleeve 11, and the ball sleeve 11 positions the ball 12. In this way, the ball 12 and the ball sleeve 11 contact and slide. In this way, the isolation cover 5 moves between the outer magnetic rotor 1 and the inner magnetic rotor 3. The isolation cover 5 isolates and weakens the magnetic force between the outer magnetic rotor 1 and the inner magnetic rotor 3. The isolation cover 5 has two layers. The inner layer is made of low carbon steel, while the outer layer is made of permalloy. The magnetic shielding operation weakens the magnetic force between the outer magnetic rotor 1 and the inner magnetic rotor 3, making it easy to disengage later.

[0050] Example 3:

[0051] In this embodiment, as Figure 3 - Figure 9 As shown, the disengagement component includes: a sleeve bracket 15, fixedly connected to one side of the sleeve block 4, with a servo motor 16 installed inside the sleeve bracket 15; a shaft 17, installed at the output end of the servo motor 16, which drives the shaft 17 to rotate; a slanted sleeve 18, fixedly connected to the outer wall of the shaft 17, with two sleeve brackets 19 fixed at one end of the outer magnetic rotor 1, one of which has a moving post 20 fixed at the bottom of its inner wall; a guide post 21, installed on the inner wall of the sleeve bracket 19, which guides the sliding of the sleeve bracket 19, with a support frame 23 installed at one end of the guide post 21, and both the connecting sleeve 2 and the guide post 21 are fixedly connected to the support frame 23; and a spring 22, located on the outer wall of the guide post 21 and on one side of the sleeve bracket 19, which provides elastic force to the sleeve bracket 19. The two sleeve brackets 19 are arranged in a circumferential distribution, and the support frame 23 is slidably connected to the sleeve bracket 19. The top surface of the moving column 20 is on the same horizontal plane as the upper surface of the inclined sleeve 18, and the cross-sectional shape of the moving column 20 is circular.

[0052] In this embodiment, as the socket block 4 moves to the left, it drives the sleeve bracket 15 to move to the left. The sleeve bracket 15 then drives the servo motor 16 to move to the left, which in turn drives the shaft 17 to move to the left. The shaft 17 causes the inclined sleeve 18 to move to the left, so that the left end of the inclined sleeve 18 is initially positioned to the left of the moving column 20. After weakening the magnetic force between the outer magnetic rotor 1 and the inner magnetic rotor 3, the servo motor 16 is activated by the wireless controller 14. The servo motor 16 drives the shaft 17 to rotate clockwise, which in turn drives the inclined sleeve 18 to rotate clockwise. The inclined sleeve 18 then begins to press against the moving column 20, causing it to move to the right. The moving column 20 then drives the socket bracket 19 to move to the right. The socket bracket 19 moves to the right along the outer wall of the guide post 21 and simultaneously along the inner wall of the support frame 23. This causes the socket bracket 19 to compress the spring 22. Spring 22 provides elastic force to the sleeve 19, so the sleeve 19 can easily drive the outer magnetic rotor 1 to move to the right. The outer magnetic rotor 1 moves smoothly and quickly out of the outside of the coupling sleeve 2, so that the outer magnetic rotor 1 is separated from the inner magnetic rotor 3. In this way, the outer magnetic rotor 1 is away from the inner magnetic rotor 3, which effectively weakens the magnetic force and allows the outer magnetic rotor 1 to easily and automatically separate from the inner magnetic rotor 3. At this time, the inner magnetic rotor 3 is no longer driven to supply torque force, and the overload disengagement of the coupling is more time-saving, labor-saving, smoother and faster.

[0053] In this embodiment, as Figure 2 As shown, a twin-screw drive shaft 26 is inserted into the inner wall of the inner magnetic rotor 3, and a drive shaft 27 is inserted into the inner wall of the coupling sleeve 2. The drive shaft 27 is driven by its own drive motor, which in turn drives the coupling sleeve 2 to rotate. The coupling sleeve 2 rotates the support frame 23, which in turn rotates the guide post 21. The guide post 21 rotates the socket frame 19, which in turn rotates the outer magnetic rotor 1. The outer magnetic rotor 1 can rotate outside the flange cover 24, and simultaneously, it magnetically drives the inner magnetic rotor 3. This drives the twin-screw drive shaft 26 to rotate. The twin-screw drive shaft 26 is installed and connected to the drive end of the twin-screw extruder, thus driving the drive end of the twin-screw extruder as well, achieving magnetic connection drive operation. Simultaneously, the coupling sleeve 2 drives the motor 8 and battery 13 to rotate, and the wireless controller 14 can also rotate. It is self-powered by a battery and requires no external power cord, allowing for automatic disengagement.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A magnetic coupling for overload disengagement in a twin-screw extruder, comprising an external magnetic rotor (1), characterized in that: The outer magnetic rotor (1) is provided with a connecting sleeve (2) inside, and an inner magnetic rotor (3) is provided on one side of the connecting sleeve (2). A socket block (4) is provided on the outer wall of the connecting sleeve (2). An isolation component is installed on the socket block (4), and an isolation cover (5) is installed on the top of the socket block (4). The detachment component is located on one side of the socket block (4); Under overload conditions, the isolation member drives the sleeve block (4) to move the isolation cover (5) between the outer magnetic rotor (1) and the inner magnetic rotor (3) to isolate and weaken the magnetic force between them; the disengagement member drives the outer magnetic rotor (1) to move along the axis of the connecting sleeve (2) to disengage the outer magnetic rotor (1) from the inner magnetic rotor (3). The isolation member includes: The screw (6) is threadedly connected to the inner wall of the sleeve block (4). A guide rod (7) is provided below the screw (6). The guide rod (7) is fixedly connected to the coupling sleeve (2). The guide rod (7) is used to guide the sliding of the sleeve block (4). A motor (8) is installed at one end of a screw (6). The outer wall of the motor (8) is fixedly connected to the coupling sleeve (2). The output end of the motor (8) is fixedly connected to the screw (6). The motor (8) is used to drive the screw (6) to rotate. A plug ring (9) is fixedly connected to one side of the isolation cover (5), and a grooved ring (10) is provided on one side of the plug ring (9). Multiple ball bushings (11) are fixedly connected to one side of the inner wall of the grooved ring (10), and each grooved ring (10) has a ball (12) rolled on its inner wall. The flange cover (24) is fixedly connected to the inner wall of the groove ring (10); The bushing plate (25) is fixedly installed at one end of the flange cover (24), and the disengagement component includes: A sleeve frame (15) is fixedly connected to one side of the sleeve block (4), and a servo motor (16) is installed inside the sleeve frame (15). A shaft (17) is mounted on the output end of a servo motor (16), which is used to drive the shaft (17) to rotate. An oblique sleeve (18) is fixedly connected to the outer wall of the shaft (17). Two sleeves (19) are fixed at one end of the outer magnetic rotor (1), and a moving column (20) is fixed at the bottom of the inner wall of one of the sleeves (19). A guide post (21) is installed on the inner wall of the sleeve frame (19). The guide post (21) is used to guide the sliding of the sleeve frame (19). A support frame (23) is installed at one end of the guide post (21). The coupling sleeve (2) and the guide post (21) are both fixedly connected to the support frame (23). A spring (22) is disposed on the outer wall of the guide post (21) and located on one side of the socket (19), the spring (22) being used to provide elastic force to the socket (19).

2. The overload disconnect magnetic coupling for twin-screw extruders according to claim 1, characterized in that: The external magnetic rotor (1) and the connecting sleeve (2) are slidably connected to the isolation cover (5), and the sleeve block (4) is fixedly connected to the isolation cover (5).

3. The overload disconnect magnetic coupling for twin-screw extruders according to claim 1, characterized in that: The thickness of the insert ring (9) is less than the thickness of the isolation cover (5), and the vertical cross-sectional shape of both the insert ring (9) and the isolation cover (5) is annular.

4. The overload disconnect magnetic coupling for twin-screw extruders according to claim 1, characterized in that: The center point of the grooved ring (10) and the center point of the ball (12) are on the same horizontal line.

5. The overload disconnect magnetic coupling for twin-screw extruders according to claim 1, characterized in that: A battery (13) is provided on one side of the motor (8), and a wireless controller (14) is installed on the upper surface of the battery (13). The motor (8) and the wireless controller (14) are electrically connected, and the battery (13) is fixedly connected to the coupling sleeve (2).

6. The overload disconnect magnetic coupling for twin-screw extruders according to claim 1, characterized in that: The two sockets (19) are arranged in a circular distribution, and the support frame (23) is slidably connected to the sockets (19).

7. The overload disconnect magnetic coupling for twin-screw extruders according to claim 1, characterized in that: The top surface of the moving column (20) is on the same horizontal plane as the upper surface of the inclined sleeve (18), and the cross-sectional shape of the moving column (20) is circular.

8. The overload disconnect magnetic coupling for twin-screw extruders according to claim 1, characterized in that: The inner wall of the inner magnetic rotor (3) is fitted with a twin screw drive shaft (26), and the inner wall of the coupling sleeve (2) is fitted with a drive shaft (27).

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