A planetary gear transmission system for stirring

Abstract

The utility model discloses a kind of planetary gear transmission systems for stirring, belong to stirring device technical field, including rack, transmission main shaft, revolution transmission unit, rotation transmission unit and solid paddle shaft;Wherein transmission main shaft is rotatably supported on rack;Revolution transmission unit includes box, the output end of transmission main shaft is inserted into box interior, first transmission assembly is arranged between box inner wall and transmission main shaft, box is driven around transmission main shaft revolution by first transmission assembly;Rotation transmission unit includes the solid paddle shaft of the side wall of box being set through, solid paddle shaft revolves with box, second transmission assembly is further arranged between solid paddle shaft and transmission main shaft, solid paddle shaft can be driven simultaneously rotation by second transmission assembly;Hollow paddle shaft is set through box and with solid paddle shaft parallel, the rotating direction of hollow paddle shaft and solid paddle shaft is opposite.Therefore the gear transmission system disclosed in the utility model can effectively improve material stirring effect.

Description

Technical Field

[0001] This utility model belongs to the technical field of stirring devices, specifically relating to a planetary gear transmission system for stirring. Background Technology

[0002] In material mixing operations in industries such as chemical, food, and pharmaceutical, mixing equipment is key to achieving material homogenization.

[0003] Existing technologies widely employ single-shaft or simple multi-shaft agitators, whose basic structure typically includes a main agitator shaft fixedly mounted at the center or eccentric position of the container, with impellers, anchor-type, or turbine-type agitator elements mounted on the shaft. This structure limits its motion to a single rotation around a fixed axis. Therefore, during agitation, the material primarily flows tangentially along the impeller blades, while the fluid velocity decreases significantly at the container walls, bottom corners, and areas far from the agitator shaft, easily creating dead zones. For high-viscosity or non-Newtonian fluids, this structurally fixed flow field defect is even more pronounced, making it difficult to guarantee effective material mixing. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a planetary gear transmission system for stirring, which is simple in structure, reasonable in design and highly practical, in order to address the shortcomings of the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a planetary gear transmission system for stirring, including a frame and a transmission main shaft rotatably supported on the frame, and further including: The revolution transmission unit includes a housing, the output end of the transmission main shaft is inserted into the housing, and a first transmission component is provided between the inner wall of the housing and the transmission main shaft. The first transmission component drives the housing to revolve around the transmission main shaft. The self-rotation transmission unit includes a solid propeller shaft that passes through the housing and revolves with the housing. A second transmission component is also provided between the solid propeller shaft and the main transmission shaft, which can drive the solid propeller shaft to rotate simultaneously. A hollow propeller shaft passes through the housing and is parallel to the solid propeller shaft. The hollow propeller shaft rotates in the opposite direction to the solid propeller shaft.

[0006] Preferably, the first transmission assembly includes a first gear sleeved on the transmission main shaft, a planetary gear meshing externally with the first gear, and a gear shaft supporting the rotation of the planetary gear. The gear shaft is mounted on a planetary gear carrier, which is T-shaped. The middle part of the planetary gear carrier extends out of the housing and is fixedly connected to the frame. The inner wall of the housing is provided with a gear ring that meshes internally with the planetary gear.

[0007] Preferably, the second transmission assembly includes a second gear sleeved on the transmission main shaft, and a third gear meshing with the second gear is provided on the solid propeller shaft.

[0008] Preferably, a fourth gear is provided on the solid propeller shaft, and a fifth gear that meshes with the fourth gear is provided on the hollow propeller shaft.

[0009] Preferably, a first connecting bracket is fixedly installed on the lower side of the housing. The first connecting bracket can revolve with the housing. Both the solid and hollow propeller shafts pass through the first connecting bracket. Both the solid and hollow propeller shafts are equipped with couplings. After passing through the couplings, the solid and hollow propeller shafts are respectively connected to corresponding torque sensors. The output end of one torque sensor is equipped with a solid blade corresponding to the solid propeller shaft, and the output end of the other torque sensor is equipped with a hollow blade corresponding to the hollow propeller shaft. Both the solid and hollow propeller blades are installed inside the mixing pot.

[0010] Preferably, a slewing bearing is also provided between the frame and the housing. The slewing bearing includes an outer slewing body fixedly connected to the frame and an inner slewing body connected to the housing. A second connecting bracket is provided on the lower side of the inner slewing body and rotates synchronously with it. The second connecting bracket is fixedly connected to the upper side of the housing.

[0011] Preferably, a first sensor is installed inside the mixing tank, a second sensor is installed on the solid impeller, and a second conductive ring is installed on the shaft of the solid impeller. The outer ring of the second conductive ring is connected to the first connecting bracket and revolves around the central axis, while the inner ring of the second conductive ring is connected to the shaft of the solid impeller and rotates on its own axis. The inner and outer rings of the second conductive ring rotate at different speeds and generate relative motion. A first conductive ring is installed between the inner rotating body and the planetary gear carrier. The outer ring of the first conductive ring can revolve around the central axis with the inner rotating body. The inner ring of the first conductive ring is fixedly connected to the planetary gear carrier. The signal line of the second sensor is electrically connected to the inner ring of the second conductive ring and transmits the signal to the outer ring of the second conductive ring through relative rotation. The signal line led out from the outer ring of the second conductive ring is electrically connected to the outer ring of the first conductive ring, and finally the signal is transmitted to the inner ring of the first conductive ring.

[0012] Preferably, the lower side of the housing is open, and a housing cover is provided on the lower side of the housing. Both the hollow propeller shaft and the solid propeller shaft pass through the housing cover, and the second connecting bracket is connected to the housing cover.

[0013] This utility model has the following advantages compared with the prior art: 1. This utility model discloses a planetary gear transmission system for stirring. When the power source drives the transmission main shaft to rotate, the revolution transmission unit can drive the housing to revolve around the transmission main shaft. At the same time, the solid paddle shaft also revolves around the shaft. Furthermore, the solid paddle shaft can also rotate on its own axis under the drive of the second transmission component while revolving around the shaft. The solid paddle shaft rotates on its own axis while revolving around the shaft, forming a planetary compound motion. This motion mode has significant advantages in stirring effect. Specifically, the revolution drives the paddle blades to sweep across the area from the center to the wall, ensuring that the material at any position in the container can participate in the flow. The rotation shears, disperses, and mixes the material in contact with the paddle blades, thereby causing the paddle blades to tumble the material, which can more quickly break up the stratification and agglomeration of the material, thus achieving a more uniform stirring effect in a shorter time than a single motion mode. 2. The present invention provides a planetary gear transmission system for stirring. Since the hollow impeller shaft and the solid impeller shaft rotate in opposite directions, this reverse rotation design creates shear force and opposing flow field between the two parallel impeller shafts. Therefore, it can not only break up the agglomeration of materials and promote the rapid penetration and fusion of different components, but also effectively prevent materials from swirling in one direction, resulting in better stirring effect. 3. The present invention provides a planetary gear transmission system for stirring, which, by connecting a first conductive ring and a second conductive ring in series, ensures that the sensor's tail wiring will not twist or break while it rotates or revolves with the housing and blades, thus ensuring the normal and stable output of the sensor signal.

[0014] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a planetary gear transmission system for stirring according to the present invention; Figure 2 This is a detailed transmission diagram of a planetary gear transmission system for stirring according to this utility model; Figure 3 This is a perspective view of the planetary gear transmission of this utility model; Figure 4 This is a schematic diagram of the planetary gear carrier of this utility model; Figure 5 This is a schematic diagram of the planetary gear transmission principle of this utility model.

[0016] Explanation of reference numerals in the attached figures: 1. Servo motor reducer; 2. Transmission spindle; 3. First conductive ring; 4. Slewing bearing; 5. Second connecting bracket; 6. Frame; 7. Housing; 8-1. First gear; 8-2. Second gear; 8-3. Fifth gear; 8-4. Fourth gear; 8-5. Third gear; 8-6. Planetary gear; 9. Gear ring; 10. Hollow propeller shaft; 11. Coupling; 12. Hollow propeller blade; 13. Mixing pot; 14. Planetary gear carrier; 15. Gear shaft; 17. Solid propeller shaft; 18. Housing cover; 19. First connecting bracket; 20. Torque sensor; 21. Second conductive ring; 22. Solid propeller blade; 23. Second sensor; 24. First sensor. Detailed Implementation

[0017] like Figure 1 and Figure 2 As shown, this utility model discloses a planetary gear transmission system for stirring, including a frame 6, a transmission main shaft, a revolution transmission unit, a rotation transmission unit, and a solid paddle shaft 17. The transmission main shaft 2 is rotatably supported on the frame 6. The revolution transmission unit includes a housing 7, with the output end of the transmission main shaft 2 extending into the housing 7. A first transmission assembly is provided between the inner wall of the housing 7 and the transmission main shaft 2, driving the housing 7 to revolve around the transmission main shaft 2. The rotation transmission unit includes a solid paddle shaft 17 passing through the side wall of the housing 7, which revolves with the housing 7. A second transmission assembly is also provided between the solid paddle shaft 17 and the transmission main shaft 2, driving the solid paddle shaft 17 to rotate simultaneously. A hollow paddle shaft 10 passes through the housing 7 and is parallel to the solid paddle shaft 17, with the hollow paddle shaft 10 rotating in the opposite direction to the solid paddle shaft 17.

[0018] This utility model discloses a planetary gear transmission system for stirring. It uses a servo motor reducer 1 as a power source to drive the transmission shaft 2 to rotate. Therefore, when the servo motor reducer 1 drives the transmission shaft 2 to rotate, the revolution transmission unit can drive the housing 7 to revolve around the transmission shaft 2. At the same time, the solid paddle shaft 17 also revolves. Furthermore, while the solid paddle shaft 17 revolves, it can also rotate on its own axis under the drive of the second transmission component. The solid paddle shaft 17 rotates on its own axis while revolving, forming a planetary compound motion. This motion mode has significant advantages for stirring effect. Specifically, the revolution of the impeller drives the blades to sweep across the area from the center to the wall, ensuring that materials at any position in the container can participate in the flow; while the rotation of the impeller shears, disperses and mixes the materials in contact with the impeller, thereby causing the impeller to tumble the materials and break up the stratification and agglomeration of the materials more quickly; and because the hollow impeller shaft 10 and the solid impeller shaft 17 rotate in opposite directions, this reverse rotation design creates shear force and opposing flow field between the two parallel impeller shafts, which can not only break up the agglomeration of materials and promote the penetration and fusion of different components, but also effectively prevent the materials from swirling in one direction, thus making the stirring effect better.

[0019] Furthermore, in order to achieve the revolution process, such as Figure 3 , Figure 4 and Figure 5 As shown, specifically in this embodiment, the first transmission component includes a first gear 8-1 sleeved on the transmission main shaft 2, a planetary gear 8-6 meshing externally with the first gear 8-1, and a gear shaft 15 supporting the rotation of the planetary gear 8-6. The gear shaft 15 is mounted on a planetary gear carrier 14, which is T-shaped. The middle part of the planetary gear carrier 14 extends out of the housing 7 and is fixedly connected to the frame 6. The inner wall of the housing 7 is provided with a gear ring 9 that meshes internally with the planetary gear 8-6. The planetary gear carrier 14 has a central hole for mounting the transmission main shaft. One end of the planetary gear carrier 14 is fixed to the frame 6, and the lower end is connected to the orbital gear ring transmission component. Therefore, when the transmission main shaft 2 rotates, the first gear 8-1 (as the sun gear) sleeved on it rotates accordingly, driving the externally meshing planetary gear 8-6 to rotate around its own gear shaft 15. Since planetary gear 8-6 also meshes with the gear ring 9 fixed on the inner wall of housing 7, the planetary gear 8-6 rotates while driving the gear ring 9 and housing 7 to revolve around the transmission shaft 2. At the same time, the fixed gear ring 9 forces the rotating planetary gear to revolve around the sun gear, while driving the entire planetary gear carrier 14 to rotate around the transmission shaft 2, ultimately outputting power in the form of revolution.

[0020] Specifically, to achieve the rotation of the solid propeller shaft, the second transmission component disclosed in this embodiment includes a second gear 8-2 sleeved on the transmission main shaft 2, and a third gear 8-5 meshing with the second gear 8-2 on the solid propeller shaft 17. When the transmission main shaft 2 rotates, the second gear 8-2 fixed on it will rotate synchronously. Since the second gear 8-2 directly meshes with the third gear 8-5 sleeved on the solid propeller shaft 17, it transmits rotational power to the third gear 8-5 through the meshing between the gears, thereby driving the third gear 8-5 to drive the solid propeller shaft 17 to rotate around its own axis, thus realizing the power transmission of converting the rotational motion of the transmission main shaft 2 into the rotational motion of the solid propeller shaft 17.

[0021] To achieve directional rotation of the hollow propeller shaft 10, a fourth gear 8-4 is provided on the solid propeller shaft 17 disclosed in this embodiment, and a fifth gear 8-3 meshing with the fourth gear 8-4 is provided on the hollow propeller shaft 10. The hollow propeller shaft 10 passes through the side wall of the housing 7. Because the hollow propeller shaft 10 also passes through the revolving housing 7, it will also revolve around the transmission main shaft 2. Furthermore, when the rotating solid propeller shaft 17 drives the fourth gear 8-4 to rotate, the meshing fifth gear 8-3 will drive the hollow propeller shaft 10 to rotate in the opposite direction.

[0022] Furthermore, in this embodiment, the outer side of the housing 7 is also provided with a first connecting bracket 19 that can revolve with the housing 7. The solid propeller shaft 17 and the hollow propeller shaft 10 both pass through the first connecting bracket 19. The solid propeller shaft 17 and the hollow propeller shaft 10 are both provided with couplings 11. The solid propeller shaft 17 and the hollow propeller shaft 10 are connected to the corresponding torque sensors 20 after passing through the couplings 11. The output end of one torque sensor 20 is provided with a solid blade 22 corresponding to the solid propeller shaft 17, and the output end of the other torque sensor 20 is also provided with a hollow blade 12 corresponding to the hollow propeller shaft 10. The solid blade 22 and the hollow blade 12 are both provided inside the mixing pot 13. The first connecting bracket 19, which revolves with the housing 7, provides stable external support for the solid impeller shaft 17 and the hollow impeller shaft 10 passing through it. At the same time, the coupling 11 on the impeller shaft plays the role of flexible connection, that is, transmitting the rotational power to the torque sensor 20. The torque sensor 20 is cylindrical in shape, with interfaces at both ends for connection. One end is connected to the solid impeller shaft 17 or the hollow impeller shaft 10 through the coupling 11 as the input end, and the other end is directly installed with the solid impeller blade 22 or the hollow impeller blade 12 as the output end. The core function of the torque sensor 20 is to measure the torque applied to the impeller blades in real time and accurately, thereby quantifying the mixing state and viscosity change of the material. Specifically, it is installed between the coupling 11 and the actual stirring impeller blades (solid impeller blade 22 and hollow impeller blade 12). When the impeller blades rotate in the mixing pot 13 and interact with the slurry, the resistance of the slurry will generate a reverse torque. This torque will act directly on the torque sensor 20, and the torque sensor 20 will accurately convert this mechanical force into an electrical signal output. Therefore, it does not directly contact the slurry, but indirectly and in real time reflects the changes in the physical properties of the slurry by measuring the force required to drive the blades immersed in the slurry, providing crucial data for process optimization and control. Thus, the torque sensor 20 can not only transmit rotational motion to the solid blades 22 and the hollow blades 12, but also monitor and analyze the mixing process.

[0023] Furthermore, a slewing bearing 4 is also provided between the frame 6 and the housing 7. The slewing bearing 4 includes an outer slewing body fixedly connected to the frame 6 and an inner slewing body connected to the housing 7. A second connecting bracket 5, which rotates synchronously with the inner slewing body, is provided on the lower side of the inner slewing body. The second connecting bracket 5 is fixedly connected to the upper side of the housing 7. By integrating the slewing bearing 4 between the frame 6 and the housing 7, a high-rigidity and high-precision rotary support platform is constructed. As an integrated component, the slewing bearing can simultaneously withstand the huge loads from the housing 7 and its internal components. The setting of the second connecting bracket locks the housing 7 and the inner slewing body of the slewing bearing 4 into a whole, realizing synchronous rotation of the two and effectively avoiding vibration and sway caused by loose connection or stress concentration.

[0024] The mixing pot 13 is equipped with a first sensor 24, which consists of multiple pressure sensors and temperature sensors. The pressure sensors and temperature sensors are used to record the force and temperature changes of the material in the mixing pot during the mixing process. In order to achieve normal output of the signal from the first temperature sensor 24, the signal output terminal of the first sensor 24 is connected to the electrical control cabinet.

[0025] Furthermore, a second sensor 23 is installed on the solid impeller 22. The second sensor 23 is a pressure sensor and a temperature sensor. The pressure sensor and temperature sensor are respectively installed on the solid impeller 22 to record the force and temperature changes of the solid impeller 22 and the force and temperature changes of the material during the stirring process. In order to ensure the normal transmission of the signal of the second sensor 23, a second conductive ring 21 is provided on the shaft of the solid impeller 22. The outer ring of the second conductive ring 21 is connected to the first connecting bracket 19 for revolution, and the inner ring of the second conductive ring 21 is connected to the shaft of the solid impeller 22 for rotation. The inner ring and the outer ring of the second conductive ring 21 rotate at different speeds and generate relative motion. A first conductive ring 3 is provided between the inner rotating body and the planetary gear carrier 14. The outer ring of the first conductive ring 3 can revolve with the inner rotating body. The inner ring of the first conductive ring 3 is fixedly connected to the planetary gear carrier 14. The signal line of the second sensor 23 is electrically connected to the inner ring of the second conductive ring 21 and transmits the signal to the second conductive ring 21 through relative rotation. The signal line from the outer ring of the second conductive ring 21 is electrically connected to the outer ring of the first conductive ring 3. Finally, the signal is transmitted to the inner ring of the first conductive ring 3, and the output end of the signal line from the inner ring of the first conductive ring 3 is also connected to the electrical control cabinet. In this embodiment, the inner ring of the second conductive ring 21 rotates at high speed with the solid blade 22, while the outer ring revolves with the entire bracket. By utilizing the differential rotation between the two, the sensor signal is successfully "separated" from the independent rotation of the blade and transmitted to the first connecting bracket 19 that revolves. After that, the signal has revolved with the first connecting bracket 19. By connecting to the rotating outer ring of the first conductive ring 3, and then utilizing its relative motion with the fixed inner ring, the signal is finally completely freed from the entire revolving system and led out to the stationary electrical control cabinet. Therefore, by connecting the first conductive ring 3 and the second conductive ring 21 in series, this utility model ensures that the tail wiring of the second sensor 23 will not be twisted or broken while it follows the blade's rotation or revolving motion, thus ensuring the normal and stable output of the sensor signal.

[0026] The basic principle of the two first conductive slip rings and the second conductive ring 21 in this application is based on sliding electrical contact. The conductive slip ring mainly consists of two core parts: a rotor, which is connected to and rotates with the rotating part (such as a roller, robotic arm, or radar antenna). The rotor has annular conductive rings (usually made of precious metals such as gold or silver), each ring being an independent circuit channel. The stator, the stationary part, is usually connected to the fixed structure of the equipment. The stator has brushes (or brush filaments) made of elastic material (such as precious metal alloy wire). Under the pressure of springs, these brushes always maintain contact with the surface of the conductive rings on the rotor. The working process is as follows: the cable at the fixed end (transmitting power or signal) is connected to the brushes on the stator, and the cable at the rotating end is connected to the conductive rings on the rotor. When the rotor starts to rotate, the conductive rings rotate accordingly. Under the action of elastic force, the brushes on the stator always slide tightly against the surface of the rotating conductive rings; in this way, current or signal is transmitted from the fixed brushes, through the sliding contact point, to the rotating conductive rings, and then to the rotating equipment, realizing the connection of signal from the fixed structure to the rotating structure.

[0027] Furthermore, the lower side of the housing 7 disclosed in this embodiment is open, and a cover 18 is provided on the lower side of the housing 7. Both the hollow propeller shaft 10 and the solid propeller shaft 17 pass through the cover 18, and the second connecting bracket 5 is connected to the cover 18. When it is necessary to maintain, clean or replace the internal structure of the housing 7, the operator only needs to remove the cover 18. This design avoids the tedious operation of disassembling multiple parts one by one in the narrow space inside the equipment. It not only greatly shortens the downtime for maintenance and reduces the complexity of operation and the risk of error, but also provides great convenience for thorough cleaning of the inside of the housing, thereby significantly improving the maintainability and efficiency of the whole machine.

[0028] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A planetary gear transmission system for stirring, characterized in that, include: The frame (6) and the drive spindle (2) rotatably supported on the frame (6); The revolution transmission unit includes a housing (7), the output end of the transmission main shaft (2) is inserted into the housing (7), and a first transmission component is provided between the inner wall of the housing (7) and the transmission main shaft (2). The housing (7) is driven to revolve around the transmission main shaft (2) through the first transmission component. The self-rotation transmission unit includes a solid propeller shaft (17) that passes through the housing (7). The solid propeller shaft (17) revolves with the housing (7). A second transmission assembly is also provided between the solid propeller shaft (17) and the transmission main shaft (2). The second transmission assembly can drive the solid propeller shaft (17) to rotate simultaneously. A hollow propeller shaft (10) is disposed through the housing (7) and parallel to the solid propeller shaft (17), and the hollow propeller shaft (10) and the solid propeller shaft (17) rotate in opposite directions.

2. The planetary gear transmission system for stirring according to claim 1, characterized in that, The first transmission assembly includes a first gear (8-1) sleeved on the transmission main shaft (2), a planetary gear (8-6) meshing externally with the first gear (8-1), and a gear shaft (15) supporting the rotation of the planetary gear (8-6). The gear shaft (15) is mounted on a planetary gear carrier (14). The planetary gear carrier (14) is T-shaped. The middle part of the planetary gear carrier (14) passes through the housing (7) and is fixedly connected to the frame (6). The inner wall of the housing (7) is provided with a gear ring (9) that meshes internally with the planetary gear (8-6).

3. The planetary gear transmission system for stirring according to claim 2, characterized in that, The second transmission assembly includes a second gear (8-2) sleeved on the transmission main shaft (2), and a third gear (8-5) meshing with the second gear (8-2) is provided on the solid propeller shaft (17).

4. The planetary gear transmission system for stirring according to claim 2, characterized in that, The solid propeller shaft (17) is provided with a fourth gear (8-4), and the hollow propeller shaft (10) is provided with a fifth gear (8-3) that meshes with the fourth gear (8-4).

5. A planetary gear transmission system for stirring according to claim 2, characterized in that, A first connecting bracket (19) is fixedly provided on the lower side of the box (7). The first connecting bracket (19) can revolve with the box (7). The solid paddle shaft (17) and the hollow paddle shaft (10) both pass through the first connecting bracket (19). A coupling (11) is provided on both the solid paddle shaft (17) and the hollow paddle shaft (10). The solid paddle shaft (17) and the hollow paddle shaft (10) are connected to the corresponding torque sensor (20) after passing through the coupling (11). The output end of one of the torque sensors (20) is provided with a solid paddle blade (22) corresponding to the solid paddle shaft (17). The output end of the other torque sensor (20) is also provided with a hollow paddle blade (12) corresponding to the hollow paddle shaft (10). The solid paddle blade (22) and the hollow paddle blade (12) are both provided in the mixing pot (13).

6. A planetary gear transmission system for stirring according to claim 5, characterized in that, A slewing bearing (4) is also provided between the frame (6) and the housing (7). The slewing bearing (4) includes an outer slewing body fixedly connected to the frame (6) and an inner slewing body connected to the housing (7). A second connecting bracket (5) is provided on the lower side of the inner slewing body and rotates synchronously with it. The second connecting bracket (5) is fixedly connected to the upper side of the housing (7).

7. A planetary gear transmission system for stirring according to claim 6, characterized in that, A first sensor (24) is installed inside the mixing pot (13), and a second sensor (23) is installed on the solid impeller (22). A second conductive ring (21) is installed on the shaft of the solid impeller (22). The outer ring of the second conductive ring (21) is connected to the first connecting bracket (19) for revolution, and the inner ring of the second conductive ring (21) is connected to the shaft of the solid impeller (22) for rotation. The inner and outer rings of the second conductive ring (21) rotate at different speeds and generate relative motion. The inner rotating body and the planetary gear carrier (14) are... A first conductive ring (3) is provided in the middle. The outer ring of the first conductive ring (3) can revolve with the inner rotating body. The inner ring of the first conductive ring (3) is fixedly connected to the planetary gear carrier (14). The signal line of the second sensor (23) is electrically connected to the inner ring of the second conductive ring (21) and transmits the signal to the outer ring of the second conductive ring (21) through relative rotation. The signal line led out from the outer ring of the second conductive ring (21) is electrically connected to the outer ring of the first conductive ring (3) and finally the signal is transmitted to the inner ring of the first conductive ring (3).

8. A planetary gear transmission system for stirring according to claim 6, characterized in that, The lower side of the box body (7) is open, and a box cover (18) is provided on the lower side of the box body (7). The hollow propeller shaft (10) and the solid propeller shaft (17) are both provided through the box cover (18). The second connecting bracket (5) is connected to the box cover (18).

Images