Air spring composite floating scraper head and driving system thereof

Abstract

This invention discloses a pneumatic spring-driven composite floating scraper head and its driving system, comprising a main body and at least one floating pneumatic scraper head. The scraper head integrates a composite elastic drive unit, a rotary transmission unit, a blade actuation unit, and a floating guide mechanism. The composite elastic drive unit uses a cylinder with a built-in spring. The rotary transmission unit transmits motor power to the cutter head, driving the blade to rotate and scrape. The floating guide mechanism, through the clearance fit between a slotted slider and a slotted hole, allows the blade to adapt to workpiece surface undulations and compensate for uneven wear, extending its lifespan. The system also features an integrated lubrication channel, achieving continuous lubrication from stationary components to the rotating working area. Through the synergistic operation of the above units, this invention solves the problems of traditional rigid scrapers easily damaging precision surfaces, uneven cleaning, and rapid blade wear, achieving efficient, non-destructive, and adaptive cleaning of workpieces such as spinnerets.

Description

Technical Field

[0001] This invention belongs to the field of chemical fiber machinery and equipment technology, and in particular relates to a gas spring composite floating scraper head and its driving system. Background Technology

[0002] In the chemical fiber spinning process, molten polymer is extruded through micropores in a spinneret to form nascent fibers. After prolonged operation, residual polymer easily accumulates and carbonizes on the spinneret surface and orifices, which can severely clog the orifices, affecting spinning quality and efficiency. Therefore, regular and thorough cleaning of the spinneret is a critical maintenance procedure in chemical fiber production. Currently, the industry commonly uses mechanical scraping to clean spinnerets. This method utilizes hardened scraper blades, driven by a device, to rotate or reciprocate and scrape the spinneret surface to remove stubborn stains.

[0003] However, existing mechanical scraping cleaning devices have revealed significant limitations in practical applications: First, to ensure cleaning effectiveness, the scraper needs to apply a certain positive pressure, but existing devices mostly use rigid supports or simple elastic elements (such as external springs), resulting in excessively rigid or insufficiently buffered output support force. This leads to hard contact between the scraper and the high-precision spinneret surface, easily scratching its delicate mirror surface during scraping, causing permanent damage and directly affecting the uniformity of subsequent spinning and the lifespan of the spinneret itself. Second, due to potential microscopic unevenness or thermal deformation on the spinneret surface, the rigidly fixed scraper cannot adaptively conform, resulting in uneven scraping pressure, incomplete cleaning, and the existence of cleaning dead zones. Third, in rotary scraping operations, the difference in linear velocity between the inner and outer diameters of the blade causes the outer edge to wear much faster than the inner edge, forming uneven wear. This not only significantly shortens the effective working time of the blade but also affects the consistency of cleaning due to changes in blade shape. In addition, some improvement schemes that attempt to introduce flexibility often have complex structures (such as using external springs in conjunction with multi-link mechanisms), poor system rigidity and stability, and insensitive and narrow range of support force adjustment, making it difficult to achieve the optimal balance between scraping force and protection under different working conditions. To solve the above problems, a gas spring composite floating scraper head and its driving system are proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a gas spring composite floating scraper head and its driving system, thereby solving the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a pneumatic spring-driven composite floating scraper head and its driving system, comprising a main body, an upper cover and a lower cover, wherein at least one integrated scraping module is disposed on the upper surface of the upper cover. The integrated scraping module is a floating pneumatic scraper head, which includes a composite elastic drive unit, a rotary transmission unit, a blade actuation unit, and a floating guide mechanism. The composite elastic drive unit includes a cylinder with a built-in mechanical spring for providing composite elastic support force. The rotary transmission unit is connected to and driven to rotate by the output end of the composite elastic drive unit, and includes a cutter head, a rotary support base, and a rotary shaft. The blade actuation unit... An elastic support is installed at the output end of the rotary transmission unit. The blade actuator includes a blade body and a clamping component that detachably fixes the blade body. A floating guide mechanism is disposed between the blade actuator and its mounting base to provide adaptive yaw freedom during operation. A lubrication channel is provided inside the floating pneumatic scraper head to guide lubricant from the stationary part of the floating pneumatic scraper head to the working area of ​​the blade actuator. Through the coordinated work of the composite elastic drive unit, rotary transmission unit, blade actuator, floating guide mechanism and built-in lubrication channel, the blade body can achieve adaptive floating scraping under controllable composite elastic force and complete lubrication simultaneously.

[0006] Preferably, the composite elastic drive unit further includes a cylinder seat, the cylinder is fixedly mounted on the bottom surface of the cylinder seat, the piston rod of the cylinder is fixedly connected to a connecting member, and the upper surface of the connecting member is connected to the cutter head drive.

[0007] Preferably, an angular contact bearing is provided between the cutter head and the connecting member, a flat key is provided on the peripheral side of the cutter head, and a first keyway and a second keyway are respectively provided on the inner wall and outer peripheral side of the rotating shaft, with the flat key engaging with the second keyway; a rotating support is provided on the upper part of the flat key, a deep groove ball bearing and a shaft gear are provided on the peripheral side of the flat key, and a plurality of sealing rings are provided between the rotating support and the flat key, with the rotating shaft installed inside the rotating support.

[0008] Preferably, the mounting base of the blade actuator is a blade holder, the elastic support is a compression spring, and the compression component is a blade pressure plate.

[0009] Preferably, a fixing plate is fixedly provided on one side of the blade holder, and a wire-blocking cover is fixedly provided on one side of the fixing plate. The floating guide mechanism includes a slotted hole opened on the blade body and a slotted slider disposed on the fixing plate, and the slotted slider is clearance-fitted into the slotted hole.

[0010] Preferably, the upper end of the compression spring is fixedly connected to the rotary support base, the lower end of the compression spring is fixedly connected to the blade holder, the upper surface of the rotary support base is provided with a notch and a blade pressure plate groove, the blade pressure plate is engaged in the blade pressure plate groove, one surface of the rotary support base is provided with a blade contact surface, and one surface of the groove-shaped slider is provided with an opening.

[0011] Preferably, the built-in lubrication channel includes a first silicone oil channel opened in the upper cover, a second silicone oil channel opened in the rotating support base, and a third silicone oil channel opened in the rotating shaft. An oil injection pipe is fixedly installed on the upper surface of the floating pneumatic scraper head, and the first silicone oil channel is connected to the subsequent oil circuit through a rotary sealing interface.

[0012] Preferably, the upper cover is provided with an oil injection hole communicating with the first silicone oil channel, and the bottom surface of the upper cover is provided with a plurality of vertical holes, which are connected to the oil injection hole.

[0013] Preferably, the rotating shaft has a silicone oil annular groove on its upper circumferential side and a retaining ring groove on its lower circumferential side.

[0014] Preferably, the upper surface of the rotating support is provided with a sealing ring placement hole, the first silicone oil channel is opened in the sealing ring placement hole, and the inner wall of the rotating support is provided with a plurality of sealing grooves, and the sealing ring is disposed in the sealing grooves.

[0015] The present invention has the following beneficial effects: This invention achieves essentially non-destructive cleaning of the spinneret surface. Specifically, it is achieved by setting an integrated air-spring cylinder as the driving unit. The cylinder is equipped with a mechanical spring, forming an air-spring composite chamber. The supporting force output by the piston is the resultant force of air pressure and spring force. This force is inherently elastic. When the cutter head is working, the compressibility of the gas in the chamber and the deformation of the spring work together to form a double elastic buffer, effectively absorbing the impact. This ensures that the force of the blade on the spinneret is always in a flexible and controllable state, thereby ensuring efficient scraping while completely avoiding surface scratches caused by rigid contact. This invention achieves self-adaptation in the scraping process and long tool life. Specifically, it is achieved by setting a floating guide mechanism composed of a slotted hole and a slotted slider. This mechanism allows the blade to generate limited adaptive floating yaw during operation. On the one hand, it enables the blade to automatically conform to the microscopic unevenness of the spinneret surface, ensuring that there are no dead corners and the cleaning effect is uniform. On the other hand, it can automatically compensate for the uneven wear caused by the difference in the inner and outer diameter linear speeds of the blade, making the blade wear more uniform and significantly extending the tool life. This invention achieves a high degree of integration in the overall structure and efficient and convenient maintenance. Specifically, it integrates the drive, transmission, floating, and lubrication functions into a single scraper head in a modular fashion. This integrated design eliminates the complex external floating and transmission linkages found in traditional solutions, resulting in an extremely compact and rigid structure. Simultaneously, the unique quick-change blade pressure plate design allows for rapid blade replacement without disassembling complex components, significantly reducing equipment downtime. The built-in centralized lubrication channel ensures reliable oil delivery from stationary parts to the high-speed rotating working area, lubricating moving parts while assisting in the cleaning process, thus improving the overall reliability of the system.

[0016] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the floating pneumatic scraper head of the present invention; Figure 3 for Figure 2 Front view structural diagram; Figure 4 for Figure 3 A schematic diagram of the AA cross-sectional structure; Figure 5 for Figure 1 Front view structural diagram; Figure 6 for Figure 5 Schematic diagram of the BB cross-section structure; Figure 7 The scraper assembly after removing the wire cap according to the present invention; Figure 8 for Figure 7 A schematic diagram of the left-side view structure; Figure 9 for Figure 8 CC cross-sectional view of the structure; Figure 10 for Figure 7 A schematic diagram of the rear view structure; Figure 11 for Figure 10 Schematic diagram of the DD cross-sectional structure; Figure 12This is a schematic diagram of the blade holder of the present invention; Figure 13 This is a schematic diagram of the blade structure of the present invention; Figure 14 This is a schematic diagram of the structure of the fixing piece of the present invention; Figure 15 This is a schematic diagram of the internal structure of the present invention; Figure 16 This is a schematic diagram of the structure of the upper cover of the present invention; Figure 17 This is a cross-sectional view of the upper cover of the present invention; Figure 18 This is a schematic diagram of the structure of the rotating support base of the present invention; Figure 19 This is a schematic diagram of the rotating shaft of the present invention.

[0019] The attached diagram lists the components represented by each number as follows: 1. Top cover; 2. Bottom cover; 3. Oil filling hole; 4. Floating pneumatic scraper head; 5. Oil injection pipe; 6. Blade holder; 7. Fixing plate; 8. Anti-screw cap; 9. Blade body; 10. Blade pressure plate; 11. Shaft gear; 12. Cylinder; 13. Cylinder seat; 14. Connecting parts; 15. Angular contact bearing; 16. Cutter disc; 17. Deep groove ball bearing; 18. Flat key; 19. Sealing ring; 20. Rotary... 21. Rotary support base; 22. Rotary shaft; 23. Compression spring; 24. Groove slider; 25. Opening; 26. Groove hole; 27. Vertical hole; 28. Sealing ring placement hole; 29. ​​First silicone oil channel; 30. Second silicone oil channel; 31. Sealing groove; 32. Third silicone oil channel; 33. First keyway; 34. Second keyway; 35. Snap ring groove; 36. Silicone oil annular groove; 37. Blade pressure plate groove; 38. Notch; 39. Blade contact surface. Detailed Implementation

[0020] The technical solutions of 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.

[0021] In the description of this invention, it should be understood that the terms "upper," "middle," "outer," "inner," etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0022] Please see Figures 1-19As shown, the present invention is a pneumatic spring composite floating scraper head and its driving system, including a main body of the device, which includes an upper cover 1 and a lower cover 2. At least one integrated scraping module is provided on the upper surface of the upper cover 1. The integrated scraping module is a floating pneumatic scraper head 4. The scraper head itself is an independent scraping module that integrates driving, transmission, execution and lubrication functions. Multiple such modules can be installed side by side on the upper cover 1 to realize synchronous zoned cleaning of a large area spinneret, which greatly improves the work efficiency and system configuration flexibility.

[0023] Each floating pneumatic scraper head 4 has four precisely coordinated functional subsystems. The source of the system's power and flexibility lies in the integrated air-spring cylinder 12, which is securely mounted via a cylinder seat 13 and integrates a mechanical spring inside the cylinder body, forming an air-spring composite chamber together with the piston. This design eliminates the complex mechanism of traditional external springs, making the supporting force output by the piston rod a dynamic resultant force of air pressure and spring preload. The fundamental advantage it brings is the formation of a dual elastic buffer mechanism and intelligent adjustability: when the scraper head contacts the workpiece, the compressibility of the gas and the deformation of the spring work synchronously to efficiently absorb the impact; by adjusting the air intake pressure, the reference value of the output force and the system stiffness can be changed steplessly and precisely, thereby ensuring that the scraping process is powerful yet gentle from the source, and fundamentally eliminating the risk of rigid impacts scratching the precision surface of the spinneret.

[0024] After power is generated, it is converted into the rotational motion required by the blade via a rotary transmission unit. The piston rod of cylinder 12 is rigidly connected to the cutter head 16 via connector 14. An angular contact bearing 15 between them is specifically designed to withstand the axial reaction force generated by scraping, ensuring the stability of the rotation axis. The cutter head 16 is tightly connected to the rotary support 20 with no circumferential slippage via a flat key 18. The rotary support 20, as the core load-bearing component, is radially supported by a deep groove ball bearing 17 on its exterior, ensuring smooth operation and low friction under high-speed rotation. Finally, the rotary shaft 21 is installed inside the rotary support 20, forming a high-rigidity, high-precision transmission terminal. This combination of multi-stage bearings and key connections not only efficiently transmits torque but also resists various reaction forces during operation, providing the blade with a precise movement trajectory and forming the mechanical basis for achieving uniform cleaning.

[0025] The blade actuator and floating guide mechanism are the components that directly perform the scraping action. The blade body 9 is pressed against the precision-machined blade contact surface 38 on the upper surface of the rotating support 20 by a blade pressure plate 10 with specific elasticity. The blade pressure plate 10 is nested in the blade pressure plate groove 36, and its side notch 37 forms a clever quick-change interface, simplifying the blade replacement operation to simply inserting a tool and gently prying it open, greatly reducing maintenance time from tens of minutes to several minutes and significantly improving equipment availability. The fixing plate 7 is fastened to the blade holder 6 and is equipped with a grooved slider 23. This slider slides into the grooved hole 25 on the bottom surface of the blade body 9 with a precisely designed gap. This structure allows the blade to generate micron-level adaptive yaw during operation. On the one hand, it can conform to the microscopic undulations of the spinneret surface in real time, ensuring uniform scraping pressure and no dead corners in cleaning. On the other hand, it can dynamically compensate for the uneven wear caused by the difference in inner and outer diameter linear speeds, so as to homogenize wear and thus improve blade life. The anti-fiber cover 8 set on one side of the fixing plate 7 effectively prevents fiber impurities from entering and ensures the long-term reliable operation of the floating mechanism.

[0026] To ensure the continuous and stable operation of this high-speed, heavy-duty system, an integrated lubrication channel is designed. Lubricant is injected through the oil injection hole 3 of the upper cover 1, flows through the first silicone oil channel 28, and, to achieve reliable delivery from stationary components to high-speed rotating components, a silicone oil annular groove 35 designed at the top of the rotating shaft 21, together with the upper cover oil channel, forms a low-leakage dynamic rotary seal pair. The lubricant then flows through the vertical hole 26 into the second silicone oil channel 29 within the rotating support 20, and finally enters the third silicone oil channel 31 at the center of the rotating shaft 21, where it is further distributed by… The oil spray pipe 5 at its end precisely sprays oil onto the scraping interface; this built-in integrated oil circuit realizes centralized oil supply and precise lubrication, which not only continuously lubricates key transmission components such as angular contact bearing 15 and deep groove ball bearing 17 to reduce wear, but also sprays silicone oil onto the working surface to wet the stains to assist in cleaning and reduce scraping resistance; the sealing ring 19 is set in the sealing ring placement hole 27 and the key sealing groove 30 to ensure reliable sealing of each chamber, while the snap ring groove 34 on the rotating shaft 21 simplifies assembly and fixation.

[0027] In the complete cleaning process, compressed air drives the cylinder 12 to move. Under the combined force of air and spring, the piston rod extends and drives the entire rotary actuator to descend, so that the blade contacts the spinneret surface with controllable flexible pressure. Subsequently, the power system drives the cutter head 16 to rotate through the shaft gear 11 or other driving methods to perform scraping. Throughout this process, the lubrication system works synchronously, and the blade adapts to the surface condition according to the floating mechanism. After the operation is completed, the air pressure is released, and the entire mechanism smoothly resets under the combined elastic action.

[0028] Working principle: When the equipment starts, an external air source supplies air to the cylinder 12. Compressed air enters the air-spring composite chamber of the cylinder 12, pushing the piston rod to extend outward against the initial preload of the built-in mechanical spring. This composite elastic support force is transmitted to the blade body 9 through the connector 14, the cutter head 16 and the subsequent transmission chain, so that it contacts the spinneret surface with elastic pressure. The system can steplessly and accurately set the reference value of the support force and the overall stiffness by adjusting the air intake pressure. When the blade body 9 contacts the working surface, the drive system (through the motor drive shaft gear 11) drives the cutter head 16 to rotate at high speed. Due to the microscopic unevenness or thermal deformation on the spinneret surface, the blade will be subjected to uneven reaction force during operation. At this time, the grooved slider 23 slides slightly in the grooved hole 25, which, in conjunction with the design clearance, allows the blade to produce micron-level pitch and yaw. This allows the blade to "float" and conform to the surface contour in real time, ensuring uniform scraping line pressure and achieving cleaning without dead angles. During rotary scraping, the linear velocity of the outer edge of the blade is greater than that of the inner edge. The floating mechanism provides the freedom of radial sliding. When the pressure of the outer edge decreases due to wear, the blade will generate a small radial adaptive displacement under the synergistic effect of the rotational centrifugal force and the clamping spring 22. This allows the unworn or less worn blade area to participate more in the work, thereby dynamically homogenizing wear and significantly extending the overall tool life.

[0029] Lubricating oil is injected through the oil injection hole 3, passes through the first silicone oil channel 28, and is continuously and stably delivered to the high-speed rotating second silicone oil channel 29 and third silicone oil channel 31 via the rotary seal interface formed by the silicone oil annular groove 35 at the top of the rotating shaft 21. This continuously lubricates the angular contact bearing 15 and the deep groove ball bearing 17, reducing transmission friction and temperature rise, and ensuring long-term operational accuracy and reliability. The effective sealing of the sealing ring 19 within the sealing groove 30 prevents oil leakage and contaminant intrusion. The lubricating oil sprayed onto the scraping interface wets and softens carbonized stains, significantly reducing scraping resistance and making scraping smoother. At the same time, it forms an extremely thin oil film, providing final isolation protection for the blade and spinneret surface, further improving the reliability of non-destructive cleaning.

[0030] After a single cleaning operation is completed, the air supply to cylinder 12 is cut off. At this time, the air pressure inside cylinder 12 drops rapidly, and the previously compressed mechanical spring becomes the main source of restoring force, pushing the piston rod to retract. At the same time, the clamping spring 22 also assists in lifting the blade assembly. Under the action of the double spring force, the entire actuator smoothly and quickly resets, detaches from the spinneret surface, and waits for the next operation command.

[0031] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A gas spring compound floating scraper head and its driving system, comprising a device body, the device body comprising an upper cover (1) and a lower cover (2), characterized in that: The upper surface of the cover (1) is provided with at least one integrated scraping module, which is a floating pneumatic scraper head (4). The floating pneumatic scraper head (4) includes a composite elastic drive unit, a rotary transmission unit, a blade execution unit and a floating guide mechanism. The composite elastic drive unit includes a cylinder (12) with a built-in mechanical spring for providing composite elastic support force. A rotary transmission unit is connected to and driven to rotate by the output end of a composite elastic drive unit. The rotary transmission unit includes a cutter head (16), a rotary support base (20), and a rotary shaft (21). The blade actuation unit is mounted on the output end of the rotary transmission unit via an elastic support member. The blade actuation unit includes a blade body (9) and a clamping component that can be detachably fixed to the blade body (9). A floating guide mechanism, located between the blade actuator and its mounting base, is used to provide adaptive yaw freedom during operation; The floating pneumatic scraper head (4) is provided with a lubrication channel to guide the lubricant from the stationary part of the floating pneumatic scraper head (4) to the working area of ​​the blade execution unit. Through the coordinated work of the composite elastic drive unit, rotary transmission unit, blade execution unit, floating guide mechanism and built-in lubrication channel, the blade body (9) can achieve adaptive floating scraping under controllable composite elastic force and complete lubrication simultaneously.

2. A gas spring compound floating scraper head and its driving system according to claim 1, characterized in that, The composite elastic drive unit also includes a cylinder seat (13), the cylinder (12) is fixedly installed on the bottom surface of the cylinder seat (13), the piston rod of the cylinder (12) is fixedly connected to a connector (14), and the upper surface of the connector (14) is drivenly connected to the cutter head (16).

3. The air spring compound floating scraper head and its driving system according to claim 1, characterized in that, An angular contact bearing (15) is provided between the cutter head (16) and the connector (14). A flat key (18) is provided on the peripheral side of the cutter head (16). A first keyway (32) and a second keyway (33) are respectively provided on the inner wall and outer peripheral side of the rotating shaft (21). The flat key (18) is engaged with the second keyway (33). The rotating support seat (20) is located on the upper part of the flat key (18). A deep groove ball bearing (17) and a shaft gear (11) are provided on the peripheral side of the flat key (18). Several sealing rings (19) are provided between the rotating support seat (20) and the flat key (18). The rotating shaft (21) is installed in the rotating support seat (20).

4. The air spring compound floating scraper head and its driving system according to claim 3, characterized in that, The mounting base of the blade actuator is the blade holder (6), the elastic support is the compression spring (22), and the compression component is the blade pressure plate (10).

5. A gas spring compound floating scraper head and its driving system according to claim 4, characterized in that, A fixing plate (7) is fixedly provided on one side of the blade holder (6), and a wire-proof cover (8) is fixedly provided on one side of the fixing plate (7). The floating guide mechanism includes a slotted hole (25) opened on the blade body (9) and a slotted slider (23) provided on the fixing plate (7). The slotted slider (23) is fitted with the slotted hole (25) with a clearance.

6. A gas spring compound floating scraper head and its driving system according to claim 5, characterized in that, The upper end of the compression spring (22) is fixedly connected to the rotating support base (20), and the lower end of the compression spring (22) is fixedly connected to the blade holder (6). The upper surface of the rotating support base (20) is provided with a notch (37) and a blade pressure plate groove (36). The blade pressure plate (10) is locked in the blade pressure plate groove (36). One surface of the rotating support base (20) is provided with a blade contact surface (38), and one surface of the groove-shaped slider (23) is provided with an opening (24).

7. The air spring compound floating scraper head and its driving system according to claim 1, wherein, The built-in lubrication channels include a first silicone oil channel (28) opened in the upper cover (1), a second silicone oil channel (29) opened in the rotating support (20), and a third silicone oil channel (31) opened in the rotating shaft (21). An oil spray pipe (5) is fixedly installed on the upper surface of the floating pneumatic scraper head (4). The first silicone oil channel (28) is connected to the subsequent oil circuit through a rotating sealing interface.

8. The air spring compound floating scraper head and its driving system according to claim 7, characterized in that, The upper cover (1) is provided with an oil injection hole (3) that communicates with the first silicone oil channel (28). The bottom surface of the upper cover (1) is provided with several vertical holes (26), and the vertical holes (26) are connected to the oil injection hole (3).

9. The air spring compound floating scraper head and its driving system according to claim 7, characterized in that, A silicone oil annular groove (35) is provided on the upper side of the rotating shaft (21), and a snap ring groove (34) is provided on the lower side of the rotating shaft (21).

10. The air spring compound floating scraper head and its driving system according to claim 7, characterized in that, The upper surface of the rotating support base (20) is provided with a sealing ring placement hole (27), the first silicone oil channel (28) is opened in the sealing ring placement hole (27), and the inner wall of the rotating support base (20) is provided with a plurality of sealing grooves (30), and the sealing ring (19) is disposed in the sealing grooves (30).

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