Drop center wheel assembly

Abstract

This invention relates to the field of externally mounted internal guide wheels for forged chains, specifically to an externally mounted internal guide wheel assembly for forged chains. It includes a bearing housing hinged to the outer wall of a slag remover; a wheel axle is rotatably connected to the center of the bearing housing via a bearing; a retaining cover is fixedly connected to one end of the bearing housing near the side wall of the slag remover; a flow guide cover is fixedly connected to the inner wall of the slag remover, coaxial with the bearing housing; a sprocket is rotatably mounted on the side of the flow guide cover away from the inner wall of the slag remover, the sprocket having an evenly spaced array of concave teeth; a retaining cover is coaxially fixedly connected to the outer side of the wheel axle and fixedly connected to the sprocket; an oil groove is formed circumferentially in the center of the wheel axle, with sealing rings fixed to the wheel axle on both sides; the oil groove stores lubricating oil; the wheel axle axis points towards the forming liquid cavity, and a fluid exchange mechanism is installed in the liquid cavity to circulate the lubricating oil; the fluid exchange mechanism includes a push-pull rod, which reciprocates along the axis as the wheel axle rotates. This assembly achieves external mounting, improving operational reliability; multiple seals and lubricating oil circulation ensure sealing effectiveness; and it is suitable for the harsh working conditions of slag removers.

Description

Technical Field

[0001] This invention relates to the field of external inner guide rollers for forged chains, and more specifically to an external inner guide roller assembly for forged chains. Background Technology

[0002] In industrial production sectors such as thermal power generation and steel smelting, slag removers are crucial auxiliary equipment. Their core function is to promptly remove ash and slag generated during production, ensuring the stable operation of the main equipment. The externally mounted internal guide wheel assembly of the forged chain, as an important component of the slag remover's transmission system, primarily guides and adapts the forged chain. Through meshing with the forged chain, it guides the chain to run along a preset trajectory, ensuring the continuity and stability of ash and slag transport. This type of guide wheel assembly typically includes core components such as bearing housings, axles, and sprockets. To prevent internal components from being corroded by ash and water, an externally mounted bearing housing is often used, making it one of the key components for improving the operational reliability of the slag remover.

[0003] However, existing forged chain external guide wheel assemblies have significant design flaws in their sealing structure, making them unsuitable for the harsh working conditions of slag removers, which are characterized by high levels of ash, water, and dust. Current mainstream sealing methods often employ a single sealing ring, which allows ash and water to directly impact the sealing face, while ash vapor and dust easily penetrate the sealing gap. With prolonged operation, the sealing ring is prone to wear and lip deformation, leading to increased sealing gaps and a significantly higher risk of seal failure. Once the seal fails, ash and water will seep into the bearing mounting cavity, causing bearing corrosion and raceway wear, ultimately resulting in guide wheel assembly jamming, affecting the normal operation of the slag remover, and even causing equipment shutdown.

[0004] In addition, the lubricating oil in existing guide wheel assemblies is mostly stored in a fixed oil tank, in a static or slow-flowing state, without a dedicated circulation and replacement mechanism. The frictional heat generated by the rotation of the sealing pair cannot be quickly dissipated by the lubricating oil, leading to excessively high local oil temperatures, accelerating the oxidation and aging of the lubricating oil, and generating impurities such as gum and carbon deposits. These impurities accumulate in the sealing gaps and oil tanks, exacerbating abrasive wear on the sealing ring lip and the wheel shaft surface, further deteriorating the sealing performance. Furthermore, aged lubricating oil requires disassembly of the equipment for replacement, which not only increases maintenance costs and downtime but also fails to prevent component damage caused by oil deterioration in a timely manner, seriously affecting the service life and operational stability of the guide wheel assembly. Therefore, it is necessary to design a die-forged chain external internal guide wheel assembly. Summary of the Invention

[0005] Therefore, it is necessary to provide an externally mounted internal guide wheel assembly for a forged chain to address the existing technical problems.

[0006] To solve the problems of the prior art, the technical solution adopted by the present invention is as follows:

[0007] A forged chain with an externally mounted internal guide pulley assembly includes:

[0008] The bearing housing is hinged to the outer wall of the slag remover. The middle part of the bearing housing is rotatably connected to the axle through the bearing. A fastening cover is fixed to one end of the bearing housing near the side wall of the slag remover.

[0009] A flow guide shroud is fixed to the inner wall of the slag remover. The flow guide shroud is coaxially arranged with the bearing seat. A sprocket is rotatably arranged on the side of the flow guide shroud away from the inner wall of the slag remover. The sprocket has concave teeth arranged in an equidistant array along the circumferential direction. A locking cover is fixed to the outer side of the axle coaxially. The locking cover is coaxially fixed to the sprocket.

[0010] An oil groove is provided in the middle of the wheel axle along the circumferential direction. A sealing ring is provided on both sides of the oil groove. The sealing ring is fixed to the wheel axle. The oil groove stores lubricating oil for dynamic sealing.

[0011] The axle has a liquid cavity for storing lubricating oil formed along its axial direction. A liquid exchange mechanism is provided in the liquid cavity. The liquid exchange mechanism includes a push-pull rod, which reciprocates along the axis of the axle when the axle rotates.

[0012] Furthermore, a flow-blocking ring is fitted around the outside of the sealing ring. The inner side of the flow-blocking ring is dynamically sealed to the two sealing rings respectively. One end of the outer side of the flow-blocking ring is fixed to the flow guide cover, and the other end abuts against the locking cover.

[0013] Furthermore, a guide strip is fixedly connected to the side of the guide shroud near the inner wall of the slag remover, and an arc-shaped retaining ring is fixedly connected to the side of the guide shroud near the sprocket.

[0014] Furthermore, the wheel axle includes a main shaft fixed to the guide fairing, a stepped shaft fixed to the sealing ring, and a secondary shaft rotatably connected to the bearing housing. An oil groove is opened in the middle of the stepped shaft, and the main shaft, stepped shaft, and secondary shaft are fixedly connected in sequence.

[0015] Furthermore, the stepped shaft is provided with a main path arranged at equal angles along the circumference. One end of the main path is connected to the oil tank and the other end is connected to the liquid cavity. The main path is coaxially fixed with an internally hollow squeezing pipe.

[0016] A secondary guide is provided on the side of the oil tank near the secondary shaft. The end of the secondary guide near the liquid chamber is connected to the liquid chamber, and the end away from the liquid chamber is sealed with bolts. A secondary guide is provided on the side of the oil tank near the secondary guide. The axis of the secondary guide is perpendicular to the axis of the secondary guide. One end of the secondary guide is connected to the oil tank, and the middle part is connected to the secondary guide. The end of the secondary guide near the secondary shaft is sealed with bolts.

[0017] Furthermore, a cover tube is provided at the end of the secondary shaft away from the stepped shaft. The cover tube is fixedly connected to the bearing seat. A lead screw seat is rotatably connected to the end of the cover tube near the secondary shaft. The lead screw seat is fixedly connected to the secondary shaft coaxially.

[0018] The end of the cover tube furthest from the secondary shaft is coaxially fixed to a guide shaft. A reciprocating screw is threadedly connected to the screw seat. One end of the reciprocating screw is fixed to the push-pull rod, and the other end is keyed to the guide shaft. A rod seat is coaxially arranged in the middle of the liquid chamber. The rod seat is fixed to the liquid chamber and keyed to the push-pull rod.

[0019] Furthermore, a liquid pusher plate is coaxially fixed to the outside of the push-pull rod, and the liquid pusher plate is dynamically sealed to the inner wall of the liquid cavity.

[0020] Furthermore, a first check valve is fixedly connected to one end of the secondary guide near the liquid chamber, and lubricating oil flows into the liquid chamber from the secondary guide through the first check valve;

[0021] A liquid blocking plate is installed on the side of the main guide path near the secondary guide path. The liquid blocking plate is fixedly connected to the liquid chamber. A second one-way valve is installed on the liquid blocking plate along the circumferential direction. The lubricating oil flows from the side of the liquid blocking plate near the pusher plate to the side of the liquid blocking plate away from the pusher plate through the second one-way valve.

[0022] Furthermore, a liquid-pushing plate is fixedly connected to the end of the push-pull rod away from the sub-shaft, and the liquid-pushing plate has perforations arranged at equal angles along the circumferential direction;

[0023] A sealing plate is elastically installed on the side of the liquid pusher plate near the stepped shaft via a tension spring. The sealing plate is connected to the push-pull rod key. The sealing plate has leakage holes arranged in an equal angle array along the circumference, and the leakage holes and perforations are staggered.

[0024] Furthermore, a plug is fixed at an equal angle along the circumference at one end of the septum near the pusher plate. The plug is coaxial with the perforation. When the tension spring moves the septum closer to the pusher plate, the plug is inserted into the corresponding perforation.

[0025] The beneficial effects of this invention compared to the prior art are:

[0026] Firstly, addressing the shortcomings of existing single-seal technologies that are susceptible to erosion by ash water and have a high risk of seal failure, this device constructs a pre-seal buffer through a flow-blocking ring. Combined with the mechanical seal of the flow guide and locking cover, and the oil film seal formed by the sealing ring and lubricating oil, a triple protection system is formed. At the same time, the arc-shaped retaining ring and the flow guide strip prevent ash water from accumulating and impacting the sealing surface, reducing the risk of corrosion from the source, significantly narrowing the ash water intrusion channel, effectively blocking ash water from seeping into the bearing mounting cavity, reducing the risk of bearing corrosion and guide wheel jamming, and ensuring the long-term stable operation of the equipment.

[0027] Secondly, addressing the shortcomings of existing technologies where static storage of lubricating oil prevents the dissipation of frictional heat, leading to rapid oil aging, this device drives unidirectional circulation of lubricating oil through a fluid exchange mechanism. This quickly removes the frictional heat generated by the sealing surfaces, preventing localized overheating of the oil. Simultaneously, the circulating flow reduces the accumulation of impurities such as gum and carbon deposits, slowing down the oxidation and aging of the lubricating oil, improving oil film stability, indirectly extending the service life of the lubricating oil, reducing the frequency of oil changes, and lowering maintenance costs. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of an embodiment;

[0029] Figure 2 This is a three-dimensional structural schematic diagram from another angle of the embodiment;

[0030] Figure 3 This is a front view of an embodiment;

[0031] Figure 4 yes Figure 3 Half-section view of the structural plan at point AA;

[0032] Figure 5 yes Figure 4 Enlarged view of the structure at point B in the middle;

[0033] Figure 6 yes Figure 3 Three-dimensional half-section view of the structure at point AA;

[0034] Figure 7 yes Figure 6 Enlarged view of the structure at point C;

[0035] Figure 8 yes Figure 6 Enlarged view of the structure at point D;

[0036] Figure 9 yes Figure 6 Enlarged view of the structure at point E in the middle.

[0037] The numbers on the map are:

[0038] 1. Bearing housing; 2. Snap-fit ​​cover; 3. Wheel axle; 4. Snap-fit ​​cover; 5. Main shaft; 6. Stepped shaft; 7. Oil tank; 8. Main guide path; 9. Squeezing pipe; 10. Secondary guide path; 11. Secondary guide path; 12. First check valve; 13. Secondary shaft; 14. Liquid chamber; 15. Sprocket; 16. Concave tooth; 17. Sealing ring; 18. Flow-blocking ring; 19. Flow guide cover; 20. Flow guide strip; 21. Arc-shaped retaining ring; 22. Cover tube; 23. Screw seat; 24. Reciprocating screw; 25. Guide shaft; 26. Push-pull rod; 27. Pushing plate; 28. Second check valve; 29. ​​Pushing plate; 30. Perforation; 31. Leakage hole; 32. Sealing plate; 33. Plug; 34. Flow-blocking plate. Detailed Implementation

[0039] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0040] refer to Figures 1 to 9 An externally mounted internal guide wheel assembly for a forged chain, comprising:

[0041] A bearing seat 1 is hinged to the outer wall of the slag remover. A wheel axle 3 is rotatably connected to the middle of the bearing seat 1 via a bearing. A fastening cover 2 is fixedly connected to one end of the bearing seat 1 near the side wall of the slag remover.

[0042] A guide shroud 19 is fixedly connected to the inner wall of the slag remover. The guide shroud 19 is coaxially arranged with the bearing seat 1. A sprocket 15 is rotatably arranged on the side of the guide shroud 19 away from the inner wall of the slag remover. The sprocket 15 has concave teeth 16 arranged in an equiangular array along the circumferential direction. A locking cover 4 is coaxially fixedly connected to the outside of the wheel axle 3. The locking cover 4 is coaxially fixedly connected to the sprocket 15.

[0043] An oil groove 7 is provided in the middle of the wheel axle 3 along the circumferential direction. A sealing ring 17 is provided on both sides of the oil groove 7. The sealing ring 17 is fixedly connected to the wheel axle 3. The oil groove 7 stores lubricating oil for dynamic sealing.

[0044] The axle 3 has a liquid cavity 14 for storing lubricating oil formed along the axial direction. The liquid cavity 14 is provided with a liquid exchange mechanism, which includes a push-pull rod 26. The push-pull rod 26 reciprocates along the axial direction of the axle 3 when the axle 3 rotates.

[0045] When this device is in operation, the bearing housing 1 is pressed against the outer wall of the slag remover. Subsequently, as the slag remover operates, the chain drives the concave teeth 16 to rotate the sprocket 15. The tooth surfaces on both sides of the concave teeth 16 form guiding and restraining surfaces. When the chain meshes with the sprocket 15, the tooth surfaces can limit the lateral displacement of the chain, preventing the chain from shifting laterally or falling off due to tension fluctuations or impacts during operation. This ensures that the chain always runs stably along the circumference of the sprocket 15, improving the operational stability of the entire slag remover transmission system. When the sprocket 15 rotates, the sealing ring 17, which is fixed to the axle 3, forms an oil film through the lubricating oil in the oil groove 7 cavity and its own siphon effect. At this time, the guide cover 19 and the locking cover 4 cooperate to form a mechanical seal, which, together with the oil film, forms a multiple seal, effectively and for a long time preventing the entry of ash water.

[0046] When the wheel axle 3 rotates, the commutation mechanism drives the lubricating oil circulation, which can accelerate the replenishment speed of lubricating oil to the sealing gap, making the formation of the siphon oil film faster and more stable. Especially during the start-up phase of the wheel axle 3, the rotation speed of the wheel axle 3 needs to be gradually increased from low to high. Traditional siphon oil films are prone to problems such as delayed formation and discontinuous oil film due to insufficient rotation speed. However, the circulation of lubricating oil in this device can actively replenish lubricating oil to the sealing gap, establish a complete oil film barrier in advance, and prevent gray water from seeping into the sealing gap when there is no oil film protection at the moment of start-up.

[0047] In addition, frictional heat is generated during the relative rotation of the sealing pair (i.e., the mating surface between the lip of the sealing ring 17 and the wheel shaft 3, and the mechanical seal). If the heat accumulates, it can easily lead to excessively high local oil temperature, which in turn causes a decrease in lubricating oil viscosity, a reduction in the oil film's load-bearing capacity, or even rupture. The circulating lubricating oil can quickly conduct this frictional heat to the outer wall of the bearing housing 1 (the externally mounted bearing housing 1 can dissipate heat quickly through air convection), effectively controlling the oil temperature in the sealing area within a reasonable range. At the same time, continuous circulation can slow down the rate of oil aging due to high-temperature oxidation, reduce the formation of gum and carbon deposits in the oil, indirectly extend the service life of the lubricating oil, reduce the frequency of regular disassembly and oil changes, and improve the continuous operation capability of the equipment.

[0048] To ensure a good seal, the following features are also included:

[0049] like Figure 5 As shown, a flow-blocking ring 18 is sleeved on the outside of the sealing ring 17. The inner side of the flow-blocking ring 18 is dynamically sealed to the two sealing rings 17 respectively. One end of the outer side of the flow-blocking ring 18 is fixedly connected to the flow guide shroud 19, and the other end abuts against the locking cover 4.

[0050] Adding a flow-restricting ring 18 to the outside of the sealing ring 17 forms a pre-sealing buffer structure, preventing most of the ash water from directly contacting the sealing ring 17. The inner side of the flow-restricting ring 18 dynamically seals with the sealing ring 17, while the outer side is fixed by abutting against the locking cover 4 and being fixedly connected to the guide cover 19. This allows the flow-restricting ring 18 and the sealing system to form a synergistic protection, further reducing the ash water intrusion channel. Combined with the original multi-seal structure, this significantly improves the overall sealing redundancy and reduces the probability of seal failure.

[0051] To prevent grey water from accumulating on the side of the guide shield 19 near the sprocket 15, the following features are specifically provided:

[0052] like Figure 5 As shown, a guide strip 20 is fixedly connected to the side of the guide shroud 19 near the inner wall of the slag remover, and an arc-shaped retaining ring 21 is fixedly connected to the side of the guide shroud 19 near the sprocket 15.

[0053] The guide strip 20 can guide the ash water flowing inside the slag remover to the side closer to the center of the guide cover 19, so as to avoid the ash water directly impacting the sealing mating surface of the guide cover 19 and the locking cover 4; the arc-shaped retaining ring 21 near the sprocket 15 can prevent the ash water from accumulating near the sealing mating surface. At the same time, the guiding effect of the arc structure can guide the small amount of accumulated ash water to the slag discharge area of ​​the slag remover, thereby reducing the erosion of the sealing area by ash water from the source and ensuring a clean operating environment for the mechanical seal pair.

[0054] To facilitate modular assembly and processing of wheel axle 3, the following features are specifically designed:

[0055] like Figure 4 and Figure 5 As shown, the wheel axle 3 includes a main shaft 5 fixedly connected to the guide shield 19, a stepped shaft 6 fixedly connected to the sealing ring 17, and a secondary shaft 13 rotatably connected to the bearing housing 1. The oil groove 7 is opened in the middle of the stepped shaft 6, and the main shaft 5, the stepped shaft 6 and the secondary shaft 13 are fixedly connected in sequence.

[0056] By disassembling the wheel axle 3 into three parts—the main shaft 5, the stepped shaft 6, and the auxiliary shaft 13—modular machining and assembly can be achieved. Different shaft segments can be machined using appropriate processes according to functional requirements. For example, the stepped shaft 6 requires an oil groove 7 and can be machined separately with high precision, improving machining accuracy and efficiency. During assembly, each shaft segment only needs to be fixed together in sequence. When a shaft segment is worn or damaged, it can be disassembled and replaced individually without replacing the entire wheel axle 3, reducing maintenance costs and spare parts consumption.

[0057] To facilitate the replacement of the lubricating oil in oil tank 7, the following features are specifically provided:

[0058] The stepped shaft 6 is provided with a main path 8 arranged at equal angles along the circumference. One end of the main path 8 is connected to the oil tank 7, and the other end is connected to the liquid cavity 14. The main path 8 is coaxially fixed with an internally hollow squeezing pipe 9.

[0059] like Figure 5 As shown, a secondary guide 10 is provided on the side of the oil tank 7 near the secondary shaft 13. The end of the secondary guide 10 near the liquid cavity 14 is connected to the liquid cavity 14, and the end away from the liquid cavity 14 is sealed with bolts. A secondary guide 11 is provided on the side of the oil tank 7 near the secondary guide 10. The axis of the secondary guide 11 is perpendicular to the axis of the secondary guide 10. One end of the secondary guide 11 is connected to the oil tank 7, and the middle part is connected to the secondary guide 10. The end of the secondary guide 11 near the secondary shaft 13 is sealed with bolts.

[0060] A main guide path 8, a secondary guide path 10, and a minor guide path 11 are constructed on the stepped shaft 6, with a squeezing pipe 9 installed on the main guide path 8, forming a channel for lubricating oil circulation and replacement. The main guide path 8 connects the liquid chamber 14 and the oil sump 7, providing a path for lubricating oil circulation. The secondary guide path 10 and the minor guide path 11 work together to form a lubricating oil replacement circuit. During replacement, only the sealing bolt at the end of the secondary guide path 10 needs to be removed to drain the aged lubricating oil and inject new lubricating oil, without disassembling the entire structure of the wheel axle 3, greatly improving the convenience of oil change and shortening maintenance time. The squeezing pipe 9 enhances the guiding of lubricating oil flow, ensuring that lubricating oil flows into the oil sump 7 from the side of the oil sump 7 away from the center of the stepped shaft 6.

[0061] In order to drive the push-pull rod 26 to reciprocate along the axis of the liquid chamber 14, the following features are also provided:

[0062] like Figure 6 , Figure 7 and Figure 8As shown, a cover tube 22 is provided at the end of the secondary shaft 13 away from the stepped shaft 6. The cover tube 22 is fixedly connected to the bearing seat 1. A lead screw seat 23 is rotatably connected to the end of the cover tube 22 near the secondary shaft 13. The lead screw seat 23 is fixedly connected to the secondary shaft 13 coaxially.

[0063] The end of the cover tube 22 away from the secondary shaft 13 is coaxially fixed to the guide shaft 25. The lead screw seat 23 is threadedly connected to the reciprocating lead screw 24. One end of the reciprocating lead screw 24 is fixedly connected to the push-pull rod 26, and the other end is keyed to the guide shaft 25. The middle of the liquid cavity 14 is coaxially provided with a rod seat, which is fixedly connected to the liquid cavity 14 and keyed to the push-pull rod 26.

[0064] A cover tube 22 is provided at the end of the secondary shaft 13 to form a protective cavity, encapsulating the transmission structure of the reciprocating lead screw 24 within it to prevent erosion by gray water from affecting transmission stability. When the wheel shaft 3 rotates, it drives the lead screw seat 23, which is fixed to it, to rotate synchronously. Since the reciprocating lead screw 24 is keyed to the guide shaft 25 and cannot rotate, the rotation of the lead screw seat 23 is converted into the reciprocating movement of the reciprocating lead screw 24 along the axial direction, which in turn drives the push-pull rod 26 to move synchronously back and forth. The rod seat is keyed to the push-pull rod 26, which can guide and limit the push-pull rod 26, ensuring that the push-pull rod 26 always moves along the axis of the liquid cavity 14, avoiding deviation that would obstruct the circulation of lubricating oil, and achieving stable drive of the reciprocating movement of the push-pull rod 26.

[0065] In order to facilitate the flow of lubricating oil in the liquid chamber 14, the following features are also provided:

[0066] like Figure 8 As shown, a liquid pusher plate 27 is coaxially fixed to the outside of the push-pull rod 26, and the liquid pusher plate 27 is dynamically sealed to the inner wall of the liquid chamber 14.

[0067] A pusher plate 27 is installed outside the push-pull rod 26. The pusher plate 27 and the inner wall of the liquid cavity 14 are dynamically sealed to divide the liquid cavity 14 into different areas. When the push-pull rod 26 drives the pusher plate 27 to move back and forth, the pusher plate 27 can generate a squeezing force on the lubricating oil in the liquid cavity 14, forcing the lubricating oil to flow between the liquid cavity 14 and each guide and oil groove 7, enhancing the power of lubricating oil circulation, ensuring that the lubricating oil can be quickly and sufficiently delivered to the sealing gap, improving the stability and timeliness of oil film formation, and accelerating the transfer of frictional heat.

[0068] To achieve unidirectional flow of lubricating oil within the oil cavity, the following features are specifically designed:

[0069] like Figure 8 As shown, a first check valve 12 is fixedly connected to one end of the secondary guide 11 near the liquid chamber 14, and lubricating oil flows into the liquid chamber 14 from the secondary guide 11 through the first check valve 12.

[0070] A liquid blocking plate 34 is provided on the side of the main guide 8 near the secondary guide 11. The liquid blocking plate 34 is fixedly connected to the liquid chamber 14. A second one-way valve 28 is provided on the liquid blocking plate 34 along the circumferential direction. The lubricating oil flows from the side of the liquid blocking plate 34 near the pusher plate 27 to the side of the liquid blocking plate 34 away from the pusher plate 27 through the second one-way valve 28.

[0071] A first check valve 12 is installed at the connection between the secondary guide 11 and the liquid chamber 14, which limits the lubricating oil to flow into the liquid chamber 14 only from the secondary guide 11; a second check valve 28 on the liquid blocking plate 34 limits the lubricating oil to flow from one side of the push plate 27 to the other side of the liquid blocking plate 34. Through the synergistic effect of the two check valves, a one-way circulation loop for the lubricating oil is constructed, which avoids backflow of the lubricating oil during the circulation process, and ensures that the lubricating oil can flow stably through key areas such as the sealing gap and oil groove 7 according to the preset path, ensuring the continuous effectiveness of the oil film, while improving the efficiency of lubricating oil circulation heat dissipation and impurity flushing.

[0072] In order to ensure that when the pusher plate 27 moves toward the liquid blocking plate 34, the lubricating oil in the liquid cavity 14 can converge to the end of the main path 8 near the liquid cavity 14, the following features are specifically provided:

[0073] like Figure 6 , Figure 8 and Figure 9 As shown, the end of the push-pull rod 26 away from the sub-shaft 13 is fixedly connected to the liquid-pushing plate 29, and the liquid-pushing plate 29 has through holes 30 arranged at equal angles along the circumferential direction;

[0074] A sealing plate 32 is elastically provided on the side of the liquid pusher plate 29 near the stepped shaft 6 via a tension spring. The sealing plate 32 is keyed to the push-pull rod 26. The sealing plate 32 has leakage holes 31 arranged in an equal angle array along the circumference. The leakage holes 31 and the perforations 30 are arranged alternately.

[0075] A pusher plate 29 and a sealing plate 32 are set at the end of the push-pull rod 26 away from the sub-shaft 13, and elastically engaged by a tension spring. When the pusher plate 27 moves toward the liquid blocking plate 34, the pusher plate 29 moves synchronously. At this time, the tension spring pulls the sealing plate 32 toward the pusher plate 29. Since the leakage hole 31 and the perforation 30 are staggered, the sealing plate 32 can block the lubricating oil return channel on one side of the pusher plate 29, so that the lubricating oil is pushed by the pusher plate 29 to converge at the end of the main road 8 near the liquid chamber 14, ensuring that the lubricating oil can flow into the main road 8 and be delivered to the oil tank 7, thereby improving the directionality and concentration of the lubricating oil circulation.

[0076] To ensure that lubricating oil can be sprayed from the liquid chamber 14 into the oil tank 7 through the squeezing pipe 9, the following features are specifically provided:

[0077] like Figure 9As shown, a plug 33 is fixed at an equal angle along the circumference of one end of the septum 32 near the pusher plate 29. The plug 33 is coaxial with the perforation 30. When the tension spring drives the septum 32 to approach the pusher plate 29, the plug 33 is inserted into the corresponding perforation 30.

[0078] A plug 33 adapted to the perforation 30 is provided on the septum 32. When the septum 32 moves away from the pusher plate 27, the plug 33 is pulled out from the perforation 30, and the lubricating oil on one side of the pusher plate 29 can flow into the area between the septum 32 and the blocking plate 34 through the perforation 30. When the septum 32 moves closer to the pusher plate 27, the plug 33 is inserted into the corresponding perforation 30. At this time, the continuous pushing of the septum 32 and the pusher plate 29 increases the pressure of the lubricating oil in this area. The high-pressure lubricating oil is sprayed into the oil tank 7 at high speed through the squeezing pipe 9, which enhances the flushing effect of the lubricating oil on the oil tank 7 and the sealing gap, and promptly removes a small amount of impurities in the sealing gap. At the same time, it quickly replenishes the sealing oil film, further improving the sealing reliability and lubricating oil circulation efficiency.

[0079] The detailed working principle of this device is as follows:

[0080] When this device is in operation, the bearing housing 1 is first hinged and pressed against the outer wall of the slag remover, achieving external installation of the core component and keeping it away from the ash water environment. After the slag remover is started, the transmission chain meshes with the concave teeth 16 of the sprocket 15, driving the sprocket 15 to rotate, which in turn drives the wheel shaft 3 to rotate synchronously through the locking cover 4. The guide constraint surface of the concave teeth 16 restricts the lateral displacement of the chain, ensuring transmission stability. During the rotation of the wheel shaft 3, the liquid changing mechanism starts synchronously: the screw seat 23, which is fixed to the auxiliary shaft 13, rotates with the wheel shaft 3. Since the reciprocating screw 24 is keyed to the guide shaft 25 and cannot rotate, the rotation of the screw seat 23 is converted into the reciprocating movement of the reciprocating screw 24 along the axis, which in turn drives the push-pull rod 26, the liquid pushing plate 27, and the liquid pushing disc 29 to move synchronously back and forth.

[0081] As the pusher plate 27 moves closer to the blocking plate 34, the tension spring, under the action of elastic restoring force, pulls the septum 32 closer to the pusher plate 29 until the plug 33 on the septum 32 is precisely inserted into the perforation 30 of the pusher plate 29, completely blocking the perforation 30 channel. At this time, the pusher plate 27 continues to advance, and the pusher plate 29 simultaneously pushes the septum 32. Together, they compress the closed cavity between the septum 32 and the blocking plate 34, causing the lubricating oil pressure in this area to rise rapidly. Under high pressure, the lubricating oil is pushed towards... At the end of the main guideway 8, the lubricating oil is directionally transported to the oil tank 7 via the hollow extrusion pipe 9 coaxially fixed within the main guideway 8. Part of the lubricating oil in the oil tank 7 forms an oil film between the sealing ring 17 and the stepped shaft 6 of the wheel axle 3 through siphon action, while the other part flows into the auxiliary guideway 10 through the secondary guideway 11. Then, through the connection between the auxiliary guideway 10 and the liquid chamber 14, under the guidance of the first one-way valve 12 (which only allows oil to flow from the auxiliary guideway 10 into the liquid chamber 14), it flows into the side of the pusher plate 27 near the blocking plate 34, completing the partial circulation and return of the oil.

[0082] At this stage, the sealing system works simultaneously: the end faces of the guide shield 19 and the locking shield 4 are precision ground to form a mechanical seal pair, which works in conjunction with the oil film seal formed by the sealing ring 17 and the lubricating oil to construct a double basic seal; the flow-blocking ring 18 outside the sealing ring 17 is dynamically sealed to the two sealing rings 17, with one end abutting against the locking shield 2 and the other end fixed to the locking shield 4, forming a front sealing buffer to further prevent ash water from approaching the core sealing area; the guide strip 20 on the side of the guide shield 19 away from the sprocket 15 can guide the ash water to divert, while the arc-shaped retaining ring 21 on the side closer to the sprocket 15 can prevent the ash water from accumulating near the sealing pair, avoiding the ash water from directly impacting the sealing surface. The multi-structure collaboration achieves effective blocking of ash water.

[0083] When the pusher plate 27 moves away from the blocking plate 34, the lubricating oil in the chamber between the pusher plate 27 and the blocking plate 34 is squeezed. At this time, the second one-way valve 28 on the blocking plate 34 (which only allows oil to flow from the side of the blocking plate 34 closest to the pusher plate 27 to the side of the blocking plate 34 away from the pusher plate 27) opens, and the lubricating oil on the side of the pusher plate 27 closest to the blocking plate 34 flows into the chamber between the blocking plate 34 and the septum 32 through the second one-way valve 28 to replenish it. At the same time, the septum 32... Under the action of the oil pressure difference, the elastic tension of the tension spring is overcome and the oil moves away from the push plate 29, causing the plug 33 to be pulled out of the perforation 30, thus releasing the blockage of the perforation 30. The lubricating oil on the side of the push plate 29 away from the sealing plate 32 passes through the perforation 30 and through the sealing plate 32, and converges with the lubricating oil replenished by the second one-way valve 28 in the chamber between the liquid blocking plate 34 and the sealing plate 32. Finally, it flows to the end of the main path 8 near the liquid chamber 14, reserving sufficient lubricating oil for the next round of high-pressure push cycle. During the entire cycle, the lubricating oil can not only quickly replenish the oil film in the sealing gap and prevent the seepage of gray water during the start-up stage, but also remove the heat generated by the friction of the sealing pair, delay the aging of the oil, and ensure the stable operation of the device under harsh conditions.

[0084] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A forged chain with an externally mounted internal guide wheel assembly, characterized in that, include: A bearing seat (1) is hinged to the outer wall of the slag remover. A wheel axle (3) is rotatably connected to the middle of the bearing seat (1) through a bearing. A fastening cover (2) is fixed to one end of the bearing seat (1) near the side wall of the slag remover. A guide shroud (19) is fixedly connected to the inner wall of the slag remover. The guide shroud (19) is coaxially arranged with the bearing seat (1). A sprocket (15) is rotatably arranged on the side of the guide shroud (19) away from the inner wall of the slag remover. The sprocket (15) has concave teeth (16) arranged in an equal angle along the circumferential direction. A locking cover (4) is fixedly connected to the outer side of the wheel axle (3) coaxially. The locking cover (4) is coaxially fixedly connected to the sprocket (15). An oil groove (7) is provided in the middle of the wheel axle (3) along the circumferential direction. A sealing ring (17) is provided on both sides of the oil groove (7). The sealing ring (17) is fixedly connected to the wheel axle (3). The axle (3) has a liquid cavity (14) for storing lubricating oil formed along the axial direction. A liquid exchange mechanism is provided in the liquid cavity (14). The liquid exchange mechanism includes a push-pull rod (26). The push-pull rod (26) reciprocates along the axial direction of the axle (3) when the axle (3) rotates.

2. The forged chain external inner guide wheel assembly according to claim 1, characterized in that, A flow-blocking ring (18) is fitted outside the sealing ring (17). The inner side of the flow-blocking ring (18) is dynamically sealed to the two sealing rings (17). One end of the outer side of the flow-blocking ring (18) is fixed to the flow guide (19), and the other end is abutted against the locking cover (4).

3. The forged chain external inner guide wheel assembly according to claim 2, characterized in that, A guide strip (20) is fixed to the side of the guide shroud (19) near the inner wall of the slag remover, and an arc-shaped retaining ring (21) is fixed to the side of the guide shroud (19) near the sprocket (15).

4. The forged chain external inner guide wheel assembly according to claim 1, characterized in that, The wheel axle (3) includes a main shaft (5) fixed to the guide shield (19), a stepped shaft (6) fixed to the sealing ring (17), and a secondary shaft (13) rotatably connected to the bearing housing (1). The oil groove (7) is opened in the middle of the stepped shaft (6), and the main shaft (5), stepped shaft (6) and secondary shaft (13) are fixedly connected in sequence.

5. The forged chain external inner guide wheel assembly according to claim 4, characterized in that, The stepped shaft (6) is arranged with a main path (8) at equal angles along the circumference. One end of the main path (8) is connected to the oil tank (7), and the other end is connected to the liquid cavity (14). The main path (8) is coaxially fixed with an internally hollow squeezing pipe (9). A secondary guide (10) is provided on the side of the oil tank (7) near the secondary shaft (13). The end of the secondary guide (10) near the liquid cavity (14) is connected to the liquid cavity (14), and the end away from the liquid cavity (14) is sealed with bolts. A secondary guide (11) is provided on the side of the oil tank (7) near the secondary guide (10). The axis of the secondary guide (11) is perpendicular to the axis of the secondary guide (10). One end of the secondary guide (11) is connected to the oil tank (7), and the middle part is connected to the secondary guide (10). The end of the secondary guide (11) near the secondary shaft (13) is sealed with bolts.

6. The forged chain external inner guide wheel assembly according to claim 5, characterized in that, A cover tube (22) is provided at the end of the secondary shaft (13) away from the stepped shaft (6). The cover tube (22) is fixedly connected to the bearing seat (1). A lead screw seat (23) is rotatably connected to the end of the cover tube (22) near the secondary shaft (13) along the same axis. The lead screw seat (23) is fixedly connected to the secondary shaft (13) along the same axis. The end of the cover tube (22) away from the secondary shaft (13) is coaxially fixed to the guide shaft (25). The screw seat (23) is threadedly connected to the reciprocating screw (24). One end of the reciprocating screw (24) is fixedly connected to the push-pull rod (26), and the other end is keyed to the guide shaft (25). The middle part of the liquid cavity (14) is coaxially provided with a rod seat, which is fixedly connected to the liquid cavity (14) and keyed to the push-pull rod (26).

7. The forged chain external inner guide wheel assembly according to claim 6, characterized in that, The push-pull rod (26) is coaxially fixed to the outside of the liquid push plate (27), and the liquid push plate (27) is dynamically sealed to the inner wall of the liquid cavity (14).

8. The forged chain external inner guide wheel assembly according to claim 7, characterized in that, A first check valve (12) is fixedly connected to one end of the secondary guide (11) near the liquid chamber (14). Lubricating oil flows into the liquid chamber (14) from the secondary guide (11) through the first check valve (12). A liquid blocking plate (34) is provided on the side of the main guide (8) near the secondary guide (11). The liquid blocking plate (34) is fixedly connected to the liquid chamber (14). A second check valve (28) is provided on the liquid blocking plate (34) along the circumferential direction. The lubricating oil flows from the side of the liquid blocking plate (34) near the pusher plate (27) to the side of the liquid blocking plate (34) away from the pusher plate (27) through the second check valve (28).

9. A die-forged chain external inner guide wheel assembly according to claim 8, characterized in that, The end of the push-pull rod (26) away from the sub-shaft (13) is fixedly connected to the liquid pusher plate (29), and the liquid pusher plate (29) is provided with perforations (30) arranged at equal angles along the circumferential direction. A sealing plate (32) is elastically provided on the side of the liquid pusher plate (29) near the stepped shaft (6) by a tension spring. The sealing plate (32) is keyed to the push-pull rod (26). The sealing plate (32) has leakage holes (31) arranged in an equal angle array along the circumferential direction. The leakage holes (31) and the perforations (30) are arranged alternately.

10. The forged chain external inner guide wheel assembly according to claim 9, characterized in that, The end of the septum (32) near the liquid pusher (29) is fixed with a plug (33) at an equal angle along the circumferential direction. The plug (33) is set on the same axis as the perforation (30). When the tension spring drives the septum (32) to approach the liquid pusher (29), the plug (33) is inserted into the corresponding perforation (30).

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