Universal turning gear and using method thereof

Abstract

The invention relates to the technical field of mechanical overhaul and maintenance auxiliary equipment, and discloses a universal turning gear and a using method thereof.The universal turning gear comprises a halving gear assembly, a driving gear assembly and an asymmetric self-locking base of a trapezoidal structure; the half-split gear assembly comprises two half-split cylindrical gears which are spliced to form an annular structure; a plurality of radial adjusting screw rods are arranged on the inner side of the rim of the half-cylindrical gear at intervals in the circumferential direction, the inner ends of the radial adjusting screw rods are connected with arc-shaped pressing plates, flexible gaskets are arranged on the inner side faces of the arc-shaped pressing plates, and the arc-shaped pressing plates are driven by rotating the radial adjusting screw rods to move in the radial direction so as to be clamped and centered on an equipment rotor. The split-half cylindrical gear is matched with a built-in radial fine adjustment centering structure, universal adaptation and high-precision concentric installation of equipment rotors with different diameters are achieved, and a radial adjustment screw is used for driving an arc-shaped pressing plate and a flexible liner to abut against the surface of the rotor inwards.

Description

Technical Field

[0001] This invention relates to the field of auxiliary equipment technology for mechanical repair and maintenance, specifically a general-purpose turning gear device and its usage method. Background Technology

[0002] In industries such as petrochemicals, power generation, and metallurgy, large rotating machinery (such as steam turbines, compressors, ball mills, and fans) must undergo low-speed rotation of the rotor during installation, commissioning, or maintenance shutdowns to perform tasks such as shaft alignment, rotor thermal bending correction, or internal component inspection. When the equipment's built-in rotation mechanism malfunctions, or when the equipment itself is not equipped with a rotation mechanism, external temporary portable rotation tools are usually required to complete the work.

[0003] However, existing temporary turning gear technology has many insurmountable limitations in practical applications. First, the difficulty of securing the gear is the biggest challenge in on-site operations. Traditional turning gear devices, in order to overcome the enormous reaction torque generated when driving the rotor, typically require the drive base to be rigidly fixed to the ground next to the equipment using anchor bolts, chemical anchors, or welding. However, in many industrial sites, the ground is often covered with anti-corrosion coatings, oil-resistant flooring, or even steel grating platforms, which strictly prohibit drilling or hot work, making it impossible for traditional devices to find an effective load-bearing foundation and thus unable to operate stably without ground anchors.

[0004] Secondly, the existing equipment has poor versatility and adaptability. Most temporary turning gears use a fixed-size clamp-type structure with an inner diameter designed for a specific shaft diameter. Since the shaft diameters of equipment rotors from different manufacturers vary greatly, maintenance units often need to customize a set of gear fixtures for each rotor specification. This not only leads to high tooling costs and large inventory pressure, but also lacks a universal tool that can quickly adapt to different shaft diameters and ensure concentricity accuracy when facing sudden non-standard equipment maintenance tasks.

[0005] Furthermore, safety and stability during transmission are major shortcomings of existing technologies. Gear transmission generates a significant radial repulsive force when outputting torque, which tends to push the drive gear away from the larger gear. Traditional devices rely solely on the rigid fixation of the base to counteract this repulsive force. If the ground friction coefficient decreases due to oil contamination or the fixing bolts loosen slightly, the drive device will shift, causing the gear meshing clearance to increase or even momentarily disengage. This not only interrupts maintenance work but, in severe cases, can damage the equipment rotor or cause personal injury to operators due to gear slippage and tooth breakage. Therefore, this invention provides a universal turning gear device and its usage method to address the deficiencies of existing technologies. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a universal turning gear device and its usage method, solving the problems mentioned in the background section.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution: a general-purpose turning gear device, comprising a split gear assembly, a drive gear assembly, and an asymmetric self-locking base with a trapezoidal structure; The split gear assembly includes two split cylindrical gears that are joined together to form a circular ring structure; the inner side of the rim of the split cylindrical gear is provided with a number of radial adjusting screws at intervals along the circumferential direction, the inner end of the radial adjusting screws is connected to an arc-shaped pressure plate, and the inner side of the arc-shaped pressure plate is provided with a flexible pad. By rotating the radial adjusting screws, the arc-shaped pressure plate is driven to move radially to clamp and center on the equipment rotor. The drive gear assembly includes a drive cylindrical gear and a drive joint. The drive cylindrical gear is mounted on the asymmetric self-locking base and is used to mesh with the split cylindrical gear for transmission. The bottom of the asymmetric self-locking base is provided with an arched groove, and a base plate is provided in the arched groove; the bottom of the asymmetric self-locking base is also provided with a flat pad and a serrated bottom pattern pad, wherein the serrated bottom pattern pad is located near the end of the split cylindrical gear, and the flat pad is located away from the end of the split cylindrical gear.

[0008] Preferably, the asymmetrical self-locking base has an opening at the upper part of its interior for the lifting seat to move up and down, and the inner sidewall of the opening has two guide grooves. The lifting seat is provided with guide strips on both sides, and the guide strips are engaged and slidably connected with the guide groove, so that the lifting seat is slidably installed in the movable opening; the driving cylindrical gear is rotatably connected to the lifting seat; The asymmetric self-locking base also includes a lead screw, the bottom end of which passes through the base plate and extends to the outside of the base plate. The shaft of the lead screw is connected to the internal thread of the lifting seat. By driving the lead screw to rotate, the lifting seat is moved up and down along the movable opening.

[0009] Preferably, the inner wall of the split cylindrical gear is provided with a guide block, and the side of the arc-shaped pressure plate is provided with a slot; the guide block is embedded in the slot and forms a sliding fit to limit the circumferential displacement of the arc-shaped pressure plate during the radial adjustment process.

[0010] Preferably, the two semi-cylindrical gears are provided with ear plates on both sides of their mating surfaces, and the two semi-cylindrical gears are fixedly connected by bolts passing through the ear plates; the drive connector is connected to one end of the shaft of the drive cylindrical gear, and the drive connector is a polygonal structure used to connect to an external manual or electric drive structure.

[0011] Preferably, it also includes an elastic preload mechanism to prevent disengagement of the drive cylindrical gear, the elastic preload mechanism including a flexible cable, a hanging ring and a positioning pin; The positioning pins are located on the outer sides of the asymmetrical self-locking base; both ends of the flexible cable are connected to a hanging ring, so that the flexible cable and the hanging ring form a ring structure; the hanging ring is attached to the outside of the positioning pins.

[0012] Preferably, the elastic pretensioning mechanism further includes a tension spring, which is connected in series in the connection path of the flexible cable or the hanging ring; in use, one side of the flexible cable forms a ring structure and wraps around the outer circumference of the equipment rotor bearing seat, while the other side is tightened to the positioning pin through the hanging ring.

[0013] Preferably, the end of the lead screw extending outside the base plate is provided with a drive head, which is adapted to a manual operating handle or an electric drive tool; the drive cylindrical gear rises and falls synchronously with the lifting seat.

[0014] Preferably, the asymmetric self-locking base has a trapezoidal structure, and the projection of the axis of the driving cylindrical gear on the horizontal plane is located between the serrated bottom pattern pad and the flat pad, and is set closer to the side of the flat pad, so as to form a self-locking torque for pressing the serrated bottom pattern pad by utilizing the difference in lever arm under the action of driving reaction force.

[0015] A method of using a universal turning gear includes the following steps: Step 1: Install the split cylindrical gears: surround the two split cylindrical gears on the equipment rotor and tighten them with bolts at the ear plates; Step 2, Radial Centering: Adjust each radial adjusting screw in sequence to push the arc-shaped pressure plate to move along the direction of the guide block and the slot until the flexible liner presses the equipment rotor and the semi-cylindrical gears are concentric; Step 3: Install the base: Place the asymmetrical self-locking base on the ground, drive the lead screw to rotate, so that the lifting seat moves in the movable port, and adjust the drive cylindrical gear to the meshing height; Step 4, Elastic pre-tightening: Wrap the flexible cable around the rotor bearing seat of the equipment, and hook the hanging rings connecting both ends of the cable onto the positioning pins on the side of the asymmetric self-locking base; Step 5, drive the rotor: apply torque through the drive joint, and use the gripping force of the serrated bottom pads and the lever arm difference of the trapezoidal structure to balance the reaction force and drive the rotor to rotate.

[0016] Preferably, in step four, the flexible cable forms a closed annular force-bearing structure after connecting the hanging ring, and the direction of the tension generated by the annular force-bearing structure is opposite to the direction of the radial repulsive force on the driving cylindrical gear.

[0017] This invention provides a universal turning gear device and its method of use. It has the following beneficial effects: 1. This invention achieves universal compatibility and high-precision concentric installation for equipment rotors of different diameters by using a split cylindrical gear in conjunction with a built-in radial fine-adjustment centering structure. The radial adjustment screw drives the arc-shaped pressure plate and flexible pad to press against the rotor surface inward. The internal support floating clamping method not only eliminates the need for additional processing or modification of the rotor shaft on site, but also compensates for the installation gap by adjusting the extension length of the screw in different positions. This effectively corrects the eccentricity error between the split gear and the equipment rotor, ensuring the smoothness of the turning gear transmission process and solving the technical problem of traditional turning gears being dedicated to specific machines and having poor versatility.

[0018] 2. This invention overcomes the technical bottleneck of achieving high-torque wheel rotation fixation in the absence of anchor bolts by utilizing the geometric and mechanical characteristics of the asymmetric self-locking base. Through the trapezoidal base design and optimization of the shaft position of the drive cylindrical gear, the tangential reaction force generated during the drive process can be transformed into a huge downward pressure that presses against the front sawtooth-patterned foot, thereby multiplying the static friction between the base and the ground. This self-locking mechanism, which becomes stronger with greater load, completely eliminates the dependence on pre-embedded ground anchors or concrete foundations, greatly improving the flexibility and convenience of maintenance operations in complex field environments.

[0019] 3. This invention constructs an elastic pre-tightening safety structure based on a flexible cable-wrapped connection, ensuring meshing reliability and equipment safety under extreme working conditions. The flexible cable can adaptively wrap around the outer wall of various shaped equipment bearing seats, forming a self-centering tension pointing towards the rotor center without needing to find a specific attachment point. This tension forms a dynamic balance closed loop with the radial repulsion force generated by gear meshing, which not only effectively prevents gear disengagement accidents caused by starting impact or slippage due to oil stains on the ground, but also absorbs the vibration energy generated by the rotor's slight jump using the flexible connection, avoiding damage to the equipment bearings caused by rigid hard connections. Attached Figure Description

[0020] Figure 1 This is a front perspective view of the present invention; Figure 2 This is a left perspective view of the present invention; Figure 3 This is a schematic diagram of the asymmetric self-locking base of the present invention; Figure 4 This is a force analysis diagram of the present invention; Figure 5 This is a schematic diagram of the split gear structure of the present invention; Figure 6 This is a schematic diagram of the arc-shaped pressure plate of the present invention; Figure 7 This is a schematic diagram of the structure of the flexible pad of the present invention.

[0021] The components include: 1. Asymmetrical self-locking base; 2. Flat pad; 3. Serrated bottom pad; 4. Base plate; 5. Lead screw; 6. Movable opening; 7. Guide groove; 8. Lifting seat; 9. Guide bar; 10. Drive cylindrical gear; 11. Drive joint; 12. Split cylindrical gear; 13. Ear plate; 14. Arc-shaped pressure plate; 15. Flexible pad; 16. Guide block; 17. Slot; 18. Radial adjusting screw; 19. Flexible cable; 20. Tension spring; 21. Hanging ring; 22. Positioning pin. Detailed Implementation

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see the appendix Figure 1 -Appendix Figure 7 This invention provides a universal turning gear device, comprising a split gear assembly, a drive gear assembly, and an asymmetric self-locking base 1. like Figure 1 and Figure 5 As shown, the split gear assembly includes two split cylindrical gears 12. These two split cylindrical gears 12 are spliced ​​together to form a complete circular structure that can cover the outside of the rotor of the equipment to be rotated. Ear plates 13 are respectively provided on both sides of the mating surface of the two split cylindrical gears 12. The two split cylindrical gears 12 are fastened together by high-strength bolts passing through the through holes on the ear plates 13, ensuring the continuity of the tooth profile and the rigidity of the overall structure. To accommodate equipment rotors of different diameters and ensure concentricity, the split cylindrical gear 12 adopts an internally supported radial adjustment structure. On the inner side of the rim of the split cylindrical gear 12, several radial adjustment screws 18 are evenly spaced along the circumferential direction. The radial adjustment screws 18 are engaged with the threaded holes on the split cylindrical gear 12. The inner end of the radial adjustment screws 18 is connected to an arc-shaped pressure plate 14, which is located between the inner ring of the split cylindrical gear 12 and the equipment rotor. like Figure 6 and Figure 7 As shown, the inner side of the arc-shaped pressure plate 14 is provided with a flexible pad 15. The surface of the flexible pad 15 facing the rotor is provided with herringbone or grid-like anti-slip texture to increase the friction coefficient with the rotor surface and prevent relative sliding. When the radial adjustment screw 18 is rotated, the screw pushes the arc-shaped pressure plate 14 to move radially inward, thereby driving the flexible pad 15 to press against the surface of the rotor. To prevent the curved pressure plate 14 from deflecting during adjustment, such as Figure 5 and Figure 6 As shown, a guide block 16 is provided on the inner wall of the split cylindrical gear 12, and a slot 17 is provided on the corresponding side of the arc-shaped pressure plate 14. The guide block 16 is embedded in the slot 17 and forms a sliding fit. This structure restricts the degree of freedom of the arc-shaped pressure plate 14 in the circumferential direction, so that it can only move in the radial direction, thus ensuring the stability of the adjustment process. like Figure 1 , Figure 2 and Figure 3 As shown, the asymmetric self-locking base 1 is the core support of this device. It has a trapezoidal frame structure. The bottom of the asymmetric self-locking base 1 is designed as an arched groove structure. A base plate 4 is set in the groove. Different support feet are set at both ends of the bottom of the base plate 4. The end closer to the split cylindrical gear 12 is provided with a serrated bottom pattern pad 3. This pad has directional anti-slip teeth and can provide greater ground grip. The end away from the split cylindrical gear 12 is provided with a flat pad 2 for auxiliary support. The asymmetric self-locking base 1 is equipped with a height adjustment mechanism to accommodate rotor shafts of different heights. Specifically, the asymmetric self-locking base 1 has a movable opening 6 at the upper part of its interior. The movable opening 6 passes through the front and rear sides of the base. The inner side wall of the movable opening 6 is machined with two vertically extending guide grooves 7. The lifting seat 8 is installed in the movable opening 6. Guide bars 9 are provided on both sides of the lifting seat 8. The guide bars 9 and the guide grooves 7 form a locking and sliding connection, so that the lifting seat 8 is restricted to moving only in the vertical direction and cannot move forward, backward or left and right. Height adjustment is achieved through lead screw 5. The bottom end of lead screw 5 passes through base plate 4 and extends to the outside of base plate 4. The extended end is provided with a drive head, which is adapted to a manual operating handle or electric drive tool. The rod body of lead screw 5 extends upward and enters the interior of lifting seat 8, and cooperates with the threaded structure inside lifting seat 8. When lead screw 5 is rotated, since lead screw 5 is fixed relative to base plate 4 in the axial position, the threaded cooperation will drive lifting seat 8 to move up and down along guide groove 7. The drive gear assembly is mounted on the lifting base 8 and includes a drive cylindrical gear 10 and a drive connector 11. The drive cylindrical gear 10 is rotatably connected to the lifting base 8 through a bearing and rises and falls synchronously with the lifting base 8 to adjust to the position where it meshes with the split cylindrical gear 12. The drive connector 11 is connected to one end of the rotating shaft of the drive cylindrical gear 10 and is designed as a polygonal structure such as a hexagonal head or a square head for connecting an external torque wrench, electric wrench, or crank. This invention utilizes mechanical principles to achieve self-locking fixation under anchorless conditions, such as... Figure 4As shown, during the turning process, the projection position of the shaft of the drive cylindrical gear 10 on the horizontal plane is specially designed. The projection point is located between the sawtooth pattern pad 3 and the flat pad 2, but closer to the side of the flat pad 2. When the driving torque is applied, the drive cylindrical gear 10 will apply a force to the split cylindrical gear 12, and at the same time receive a reaction force from the large gear. This reaction force includes a downward tangential component force Ft and an outward radial repulsive force Fr. Based on the aforementioned asymmetrical geometric structure, the downward tangential component Ft acts on the front serrated bottom pad 3 through a long lever arm, generating a huge downward pressure, which multiplies the static friction between the serrated bottom pad 3 and the ground. At the same time, although the radial repulsive force Fr has a tendency to push the base away, it is balanced by the increased friction. This design transforms the reaction force that hinders the turning of the wheel into a locking force that fixes the base, achieving a self-locking effect where the greater the load, the more stable the base. To prevent safety hazards caused by the moment of start-up or slippery ground, this device is also equipped with an elastic pre-tightening mechanism, which includes a flexible cable 19, a hanging ring 21, a positioning pin 22 and a tension spring 20. The positioning pin 22 is fixedly set on both sides of the asymmetric self-locking base 1. The two ends of the flexible cable 19 are connected to a hanging ring 21, or the two ends are connected to the hanging ring 21 respectively, so that the flexible cable 19 can form a closed or semi-closed ring force structure. In practical use, the middle part of the flexible cable 19 wraps around the outer circumference of the rotor bearing seat. Due to the flexible strip structure, the flexible cable 19 can adapt to the shape of the bearing seat. It can fit both round and square bearing seats. The tension spring 20 is connected in series in the connection path of the flexible cable 19 or the hanging ring 21 to provide continuous tension. After the hanging ring 21 is hooked into the positioning pin 22 on the side of the base, the flexible cable 19 is tightened. At this time, the direction of the tension generated by the flexible cable 19 is opposite to the direction of the radial repulsion force on the driving cylindrical gear 10, thereby keeping the asymmetric self-locking base 1 always pulled towards the center of the rotor to prevent the gear from disengaging.

[0024] The present invention also provides a method of using a universal turning gear device, comprising the following steps: Step 1 is to install the split cylindrical gears 12. The two split cylindrical gears 12 are placed around the rotor of the equipment to be rotated, so that the guide block 16 is initially aligned with the slot 17. The bolts are inserted into the ear plate 13 and pre-tightened so that the two split gears are combined into one. Step two is radial centering. Use a wrench to adjust each radial adjustment screw 18 in sequence. The screw pushes the arc-shaped pressure plate 14 to move inward, and the flexible pad 15 contacts the rotor surface. During this process, it is recommended to use a dial indicator to monitor the runout of the outer circle of the split cylindrical gear 12 and correct the eccentricity error by symmetrical adjustment until the flexible pad 15 is firmly pressed against the equipment rotor and the rotation center of the split cylindrical gear 12 coincides with the center of the equipment rotor. Step 3 is to install the base. Place the asymmetric self-locking base 1 on the ground directly below the split cylindrical gear 12. The operator drives the lead screw 5 to rotate, causing the lifting seat 8 to move upward in the movable port 6 until the driving cylindrical gear 10 and the split cylindrical gear 12 are fully engaged. Step four is elastic pre-tightening. Select a flexible cable 19 of appropriate length, wrap it around the outside of the rotor bearing seat of the equipment, and forcefully pull the hanging rings 21 connected to both ends of the cable toward the asymmetric self-locking base 1 and hook them onto the positioning pins 22 on the side. At this time, the tension spring 20 is in a stretched state, and the flexible cable 19 forms a closed ring force structure. The direction of the tension generated by this structure cancels the radial repulsive force generated during subsequent driving. Step five is to drive the rotating trolley. Connect the torque wrench or electric rotating trolley tool to the drive connector 11 and apply torque to drive the cylindrical gear 10 to rotate. During the rotation, the base remains stationary by using the gripping force of the serrated bottom pad 3 and the lever arm difference of the trapezoidal structure to balance the reaction force, thereby driving the equipment rotor to rotate at a predetermined angle or speed.

[0025] Working principle: Due to the varying rotor shaft diameters of large equipment and the fact that precision machining is often impossible on-site, this invention employs an internal support floating clamping technology. After the two split cylindrical gears 12 are encircled and securely connected on the rotor, the rotational motion of the threaded pair is converted into a linear thrust along the radial direction by rotating the radial adjustment screw 18. Since the arc pressure plate 14 and the split cylindrical gear 12 are connected by the guide block 16 and the slot 17, the circumferential freedom is restricted, ensuring that the arc pressure plate 14 moves perpendicular to the axis. As the radial adjustment screws 18 advance in various directions, the flexible pad 15 is compressed and generates high friction, rigidly locking the split cylindrical gear 12 onto the rotor. At the same time, by differentially adjusting the insertion length of the radial adjustment screws 18 at different angles, the dimensional deviation of the rotor shaft diameter can be compensated, and the rotation center of the split cylindrical gear 12 can be finely adjusted to coincide with the physical axis of the rotor, thereby eliminating eccentric runout during rotation. Secondly, regarding the mechanical self-locking principle of the asymmetric self-locking base 1, this is the core of the invention's "anchor-free" operation, as referred to in the force analysis. Figure 4When the driving cylindrical gear 10 meshes with the split cylindrical gear 12 and inputs torque, two component forces are generated at the meshing point: tangential driving force Ft (direction downward) and radial repulsive force Fr (direction horizontally outward). The trapezoidal asymmetric structure designed in this invention forces the projection of the axis of the driving cylindrical gear 10 to be located between the serrated bottom pattern pad 3 and the flat pad 2, and significantly closer to the rear flat pad 2. According to the principle of torque balance, the downward tangential driving force Ft will generate a huge downward friction-increasing torque on the front serrated bottom pattern pad 3 with the flat pad 2 as the fulcrum. The greater the driving load, the greater the tangential driving force Ft, and the greater the downward friction-increasing torque, thereby increasing the maximum static friction force between the serrated bottom pattern pad 3 and the ground by a factor of two. As long as the design ensures that the friction force after friction increase is greater than the horizontal thrust caused by the radial repulsive force Fr, the asymmetric self-locking base 1 can achieve a self-locking state that becomes more and more stable as the plate is mounted, without the need for external ground anchor fixation. Furthermore, regarding the closed-loop steady-state principle of the elastic preload mechanism, in order to cope with the impact at the moment of start-up or the fluctuation of the ground friction coefficient, this invention introduces a mechanical closed loop constructed by a flexible cable 19. The flexible cable 19 is U-shaped and wraps around the outer circular surface of the bearing seat where the equipment is fixed. It utilizes the high wrap angle friction effect of the flexible body to achieve positioning without finding a specific hanging point. The two ends of the flexible cable 19 converge and are connected to the positioning pin 22 on the side of the asymmetric self-locking base 1 through the hanging ring 21. With the constant tension of the tension spring 20, a preload closed loop is formed between the asymmetric self-locking base 1, the drive assembly, the rotor, and the bearing seat. The direction of this preload is opposite to the direction of the radial repulsive force Fr, and it always pulls the asymmetric self-locking base 1 toward the center of the rotor. This flexible connection not only prevents the risk of disengagement of the drive cylindrical gear 10 under high load, but also absorbs the vibration energy generated by the slight jump of the rotor through flexible deformation, ensuring the smoothness of the transmission process. Finally, in terms of power transmission, the driving force is input to the drive connector 11 via a torque wrench or power tool, which drives the small-diameter drive cylindrical gear 10 to rotate. After gear meshing, the speed is reduced and the torque is increased, which drives the large-diameter split cylindrical gear 12 to drive the equipment rotor to rotate. The lifting mechanism that cooperates with the lead screw 5 and the guide slide 7 ensures that the lifting seat 8 can drive the drive cylindrical gear 10 to move vertically up and down to find the optimal meshing pitch circle, thus avoiding tooth surface wear caused by poor meshing.

Claims

1. A universal turning gear device, characterized in that, It includes a split gear assembly, a drive gear assembly, and an asymmetric self-locking base with a trapezoidal structure (1); The split gear assembly includes two split cylindrical gears (12) that are spliced ​​together to form a circular ring structure; a plurality of radial adjusting screws (18) are provided at intervals along the circumferential direction on the inner side of the rim of the split cylindrical gear (12); an arc-shaped pressure plate (14) is connected to the inner end of the radial adjusting screw (18); a flexible pad (15) is provided on the inner side of the arc-shaped pressure plate (14); the arc-shaped pressure plate (14) is driven to move radially by rotating the radial adjusting screw (18) to clamp and center on the equipment rotor; The drive gear assembly includes a drive cylindrical gear (10) and a drive joint (11). The drive cylindrical gear (10) is mounted on the asymmetric self-locking base (1) and is used to mesh with the split cylindrical gear (12) for transmission. The bottom of the asymmetric self-locking base (1) is provided with an arched groove, and a base plate (4) is provided in the arched groove; the bottom of the asymmetric self-locking base (1) is also provided with a flat pad (2) and a serrated bottom pattern pad (3), wherein the serrated bottom pattern pad (3) is provided near the end of the split cylindrical gear (12), and the flat pad (2) is provided away from the end of the split cylindrical gear (12).

2. The universal turning gear device according to claim 1, characterized in that, The asymmetrical self-locking base (1) has an active opening (6) at the upper part of its interior for the lifting seat (8) to move up and down. The inner sidewall of the active opening (6) is provided with two guide grooves (7). The lifting seat (8) is provided with guide strips (9) on both sides. The guide strips (9) and the guide groove (7) form a sliding connection, so that the lifting seat (8) is limited and slidably installed in the movable opening (6); the driving cylindrical gear (10) is rotatably connected to the lifting seat (8). The asymmetric self-locking base (1) also includes a lead screw (5), the bottom end of which passes through the base plate (4) and extends to the outside of the base plate (4). The shaft of the lead screw (5) is connected to the internal thread of the lifting seat (8). By driving the lead screw (5) to rotate, the lifting seat (8) is driven to rise and fall along the movable opening (6).

3. A universal turning gear device according to claim 1, characterized in that, The inner wall of the split cylindrical gear (12) is provided with a guide block (16), and the side of the arc-shaped pressure plate (14) is provided with a slot (17); the guide block (16) is embedded in the slot (17) and forms a sliding fit to limit the circumferential displacement of the arc-shaped pressure plate (14) during the radial adjustment process.

4. A universal turning gear device according to claim 1, characterized in that, The two split cylindrical gears (12) are provided with ear plates (13) on both sides of their mating surfaces. The two split cylindrical gears (12) are fixedly connected by bolts passing through the ear plates (13). The drive connector (11) is connected to one end of the shaft of the drive cylindrical gear (10). The drive connector (11) is a polygonal structure and is used to connect to an external manual or electric drive structure.

5. A universal turning gear device according to claim 1, characterized in that, It also includes an elastic preload mechanism to prevent the drive cylindrical gear (10) from disengaging, the elastic preload mechanism including a flexible cable (19), a hanging ring (21) and a positioning pin (22). The positioning pin (22) is located on both sides of the asymmetric self-locking base (1); the two ends of the flexible cable (19) are connected to a hanging ring (21), so that the flexible cable (19) and the hanging ring (21) form a ring structure; the hanging ring (21) is attached to the outside of the positioning pin (22).

6. A universal turning gear device according to claim 5, characterized in that, The elastic pretensioning mechanism also includes a tension spring (20), which is connected in series in the connection path of the flexible cable (19) or the hanging ring (21). In use, one side of the flexible cable (19) forms a ring structure and wraps around the outer circumference of the equipment rotor bearing seat, while the other side is tightened to the positioning pin (22) by the hanging ring (21).

7. A universal turning gear device according to claim 2, characterized in that, The lead screw (5) has a drive head at one end extending outside the base plate (4). The drive head is adapted to a manual operating handle or an electric drive tool. The drive cylindrical gear (10) rises and falls synchronously with the lifting seat (8).

8. A universal turning gear device according to claim 1, characterized in that, The asymmetric self-locking base (1) has a trapezoidal structure, and the projection of the axis of the driving cylindrical gear (10) on the horizontal plane is located between the sawtooth pattern pad (3) and the flat pad (2), and is set close to the side of the flat pad (2) so that the self-locking torque of the sawtooth pattern pad (3) can be formed by the difference of lever arm under the action of driving reaction force.

9. A method of using a universal turning gear device, applied to the universal turning gear device described in any one of claims 1-8, characterized in that, Includes the following steps: Step 1: Install the split cylindrical gears: surround the two split cylindrical gears (12) on the equipment rotor and tighten them with bolts at the ear plate (13); Step 2, Radial centering: Adjust each radial adjustment screw (18) in sequence to push the arc-shaped pressure plate (14) to move along the mating direction of the guide block (16) and the slot (17) until the flexible pad (15) presses the equipment rotor and the semi-cylindrical gear (12) is concentric; Step 3, Install the base: Place the asymmetric self-locking base (1) on the ground, drive the lead screw (5) to rotate, so that the lifting seat (8) moves in the movable port (6), and adjust the drive cylindrical gear (10) to the meshing height; Step 4, elastic pre-tightening: Pass the flexible cable (19) around the rotor bearing seat of the equipment, and hang the hanging rings (21) connecting the two ends of the cable on the positioning pins (22) on the side of the asymmetric self-locking base (1); Step 5, drive the rotor: apply torque through the drive joint (11), and use the gripping force of the serrated bottom pad (3) and the lever arm difference of the trapezoidal structure to balance the reaction force and drive the rotor to rotate.

10. The method of using a universal turning gear device according to claim 9, characterized in that, In step four, the flexible cable (19) forms a closed annular force structure after connecting the hanging ring (21). The direction of the tension generated by the annular force structure is opposite to the direction of the radial repulsion force on the driving cylindrical gear (10).

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