Polyoxymethylene modified high-strength guide ring

Abstract

The utility model discloses a kind of polyformaldehyde modified high-strength guide rings, belong to mechanical seal technical field, including ring body, restriction ring and restriction block, rigid ring and reinforcing plate are embedded in ring body inside, buffer cone is fixed in ring body side, early warning mechanism is also provided on ring body, early warning mechanism includes bright color layer and micro recess that are opened in ring body inner circumferential surface and are embedded in ring body inside, and elastic torus and detector for monitoring are sleeved in the outer periphery of ring body, storage room filled with solid lubricant can also be opened on ring body.The utility model improves the shock resistance and shock-absorbing capacity by enhancement and buffering design, and also through the early warning mechanism that vision and electron are combined, intuitive monitoring, electronic early warning and automatic compensation to wear state are realized, solve the hidden danger of safety that wear is invisible, significantly improve operation reliability and maintainability.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, and in particular to a polyoxymethylene modified high-strength guide ring. Background Technology

[0002] Guide rings, as key support and guiding components in hydraulic cylinders or pneumatic cylinders, primarily support the piston rod, preventing radial displacement due to uneven force during movement. This ensures the normal operation of seals and the stable operation of the system. In heavy-duty engineering machinery such as crane luffing cylinders, guide rings need to withstand extremely high radial loads and severe impact vibrations. Although traditional polyoxymethylene guide rings possess a certain degree of self-lubrication, their structural rigidity is often insufficient under such high-intensity conditions, making them prone to creep or elastic deformation, leading to a decrease in guiding accuracy.

[0003] This lack of structural strength and rigidity exacerbates the minute vibrations of the piston rod. These vibrations not only cause a harsh, abnormal noise but also transmit to the entire mechanical structure, leading to system vibration. More seriously, this continuous friction under high loads causes accelerated wear of the guide ring.

[0004] However, the wear of existing guide rings is invisible. The wear occurs inside the cylinder, and maintenance personnel cannot visually detect the degree of wear during routine inspections. This invisible accumulation of wear makes guide ring failure often sudden. Once the wear exceeds the limit, the guide ring fails, and the piston rod will directly rub against the cylinder, causing catastrophic damage to the entire expensive hydraulic system, posing serious safety hazards and high maintenance costs.

[0005] Therefore, this invention proposes a polyoxymethylene modified high-strength guide ring to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems of insufficient structural rigidity, easy vibration and abnormal noise under high load, and internal wear that cannot be visually monitored, which poses a safety hazard due to sudden failure, the present invention aims to provide a polyoxymethylene modified high-strength guide ring with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a polyoxymethylene modified high-strength guide ring, comprising: a ring body as the main body; two limiting rings spaced apart on the outer periphery of the ring body; and a limiting block fixedly connected between the two limiting rings.

[0008] The innovative structure of the guide ring includes a rigid ring and a reinforcing plate embedded inside the ring body; a buffer cone fixedly connected to the side of the ring body facing the inside of the cylinder; and a warning mechanism.

[0009] The rigid ring and reinforcing plate are integrally embedded with the ring body to form a reinforced composite structure, which enhances the overall structural strength and shock absorption capacity. The buffer cone, fixed to one side of the ring body, acts as a buffer against external impacts, directly bearing and mitigating axial impacts. The early warning mechanism addresses wear monitoring; it includes a bright-colored layer embedded inside the ring body and multiple micro-grooves on the inner circumferential surface where the ring body contacts the piston rod. The bright-colored layer and micro-grooves are combined at the friction and near-friction surfaces of the ring body to visually reveal the degree of wear after the ring body has worn down.

[0010] Preferably, the warning mechanism further includes a resilient ring and a detector. The resilient ring is fitted around the outer circumference of the ring body and is axially confined between two limiting rings. The detector is mounted between the resilient ring and the ring body and is used to detect the pressure applied by the resilient ring, thereby providing an electronic warning when the ring body wears, through the release of the elastic force of the resilient ring and the change in data from the detector.

[0011] Preferably, the ring body also has a storage chamber filled with a solid lubricant, which melts when heated during operation to achieve self-lubrication and reduce friction noise.

[0012] Preferably, the rigid ring and reinforcing plate are made of composite materials, a material choice that helps to simultaneously increase structural strength and absorb vibration energy.

[0013] Preferably, the limiting block is used to engage with a groove adapted on the cylinder wall, and its main function is to limit unnecessary axial rotation of the ring body during operation and enhance the stability of the fixation.

[0014] Preferably, the color of the bright layer is different from the main color of the ring. This striking color contrast is the basis for achieving visual warning and ensures that wear and tear can be easily identified.

[0015] Preferably, the elastic ring is used to push the ring body closer to the piston rod by its elastic force when the inner circumferential surface of the ring body is worn, so as to realize automatic compensation of wear gap and maintain the tightness of the wire.

[0016] Preferably, multiple micro-grooves are evenly distributed along the inner circumferential surface of the ring. This even distribution design allows the degree of wear to be observed and judged uniformly by the area or depth of the groove disappearance.

[0017] This utility model has the following beneficial effects: 1. This utility model solves the problems of insufficient strength and unstable fixation of existing guide ring structures by setting up a limiting ring, limiting block, rigid ring, reinforcing plate and buffer cone in synergy, which easily cause abnormal noise and displacement due to vibration and impact during operation. It achieves the technical effects of improving structural strength, enhancing fixation stability and effectively reducing vibration and noise. 2. This utility model solves the problems of existing guide rings having difficulty in intuitively judging the wear level, relying on experience for maintenance, and having difficulty predicting the lifespan by setting micro-grooves on the ring body and embedding a bright color layer inside. It achieves the technical effect of making the wear state visible, intuitive to judge, easy to maintain, and providing early warning. 3. This utility model, by setting an elastic ring and a detector, solves the problems of unstable guidance caused by gaps generated after the guide ring wears, and the inability to remotely or automatically monitor wear data. It achieves the technical effect of automatically compensating for wear gaps and realizing electronic early warning through data changes. Attached Figure Description

[0018] Figure 1 This is a front view of a polyoxymethylene modified high-strength guide ring proposed in this utility model; Figure 2 This is a split view of a polyoxymethylene modified high-strength guide ring proposed in this utility model; Figure 3 This is a partial front view of the structure of a polyoxymethylene modified high-strength guide ring proposed in this utility model; Figure 4 This is a partial front view of the structure of a polyoxymethylene modified high-strength guide ring proposed in this utility model.

[0019] Legend: 1. Ring body; 2. Early warning mechanism; 201. Miniature groove; 202. Elastic ring; 203. Detector; 204. Bright color layer; 3. Restriction ring; 4. Restriction block; 5. Storage chamber; 6. Buffer cone; 7. Rigid ring; 8. Reinforcing plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] Example: Please refer to Figures 1 to 4 This utility model provides a polyoxymethylene modified high-strength guide ring, including a ring body 1 as the main body, and two limiting rings 3 and a limiting block 4 for fixing the guide ring. The two limiting rings 3 are spaced apart on the outer periphery of the ring body 1, and the limiting block 4 is fixedly connected between the two limiting rings 3 and restricts the axial rotation of the ring 3 by cooperating with the groove adapted on the cylinder wall. The two limiting rings 3 are used to restrict the axial displacement of the guide ring. To achieve self-lubrication and noise reduction, a storage chamber 5 is provided on the ring body 1. The storage chamber 5 is filled with solid lubricant. The heat generated by working friction melts the lubricant and coats the friction surface. To enhance the structure and reduce vibration, a rigid ring 7 and a reinforcing plate 8 are embedded inside the ring body 1. Figure 3 As shown, the rigid ring 7 and the reinforcing plate 8 are made of composite materials and are stacked together to increase the overall strength and absorb vibration. At the same time, a buffer cone 6 is fixedly connected to the side of the ring body 1 facing the inside of the cylinder to directly bear the impact and buffer it. The guide ring also includes a warning mechanism 2, which integrates visual and electronic dual warning functions. Its visual warning part includes a bright layer 204 embedded in the ring body 1 and close to the inner circumferential surface that contacts the piston rod. Please refer to Figures 1 to 3 The color of the bright layer 204 is different from the main color of the ring body 1, and there are multiple micro-grooves 201 evenly distributed along the inner circumference of the ring body 1. As friction and wear occur, the micro-grooves 201 will become shallower and eventually disappear, while the bright layer 204 will gradually become visible, thus providing an intuitive basis for judging wear. Its electronic warning part includes an elastic ring 202 sleeved on the outer circumference of the ring body 1 and axially limited between two limiting rings 3, and a detector 203 installed between the elastic ring 202 and the ring body 1. The elastic ring 202 is used to continuously push the ring body 1 towards the piston rod when it wears, while the detector 203 is used to detect the pressure change applied by the elastic ring 202 and reflect the degree of wear in the form of data.

[0022] Please refer to Figure 1 , Figure 2 and Figure 3 The internal reinforcement structure includes a rigid ring 7 and a reinforcing plate 8. Both the rigid ring 7 and the reinforcing plate 8 are made of composite materials. They are stacked together and integrally embedded in the interior of the ring body 1. The internal reinforcement structure is completely covered by the polyoxymethylene material of the ring body 1. Its function is to significantly increase the overall structural strength and compressive strength of the ring body 1. At the same time, it utilizes the properties of composite materials to absorb vibration energy and convert it into heat energy to achieve a vibration reduction effect. Meanwhile, the buffer cone 6 is fixedly connected to the side of the ring body 1 facing the inside of the cylinder. The tip of the buffer cone 6 faces the direction of the impact source. In the assembled state, the buffer cone 6, as the buffer component of the ring body 1, first bears the axial impact force from inside the cylinder. This structure, which combines internal reinforcement and external buffering, ensures that the guide ring can effectively disperse stress and absorb impact energy when subjected to high-intensity work and accidental impacts, thereby reducing the vibration and abnormal noise of the entire variable amplitude cylinder system.

[0023] Please refer to Figures 1 to 2 To achieve automatic wear compensation and electronic detection and early warning, please refer to... Figure 1 and Figure 2The warning mechanism 2 also includes an elastic ring 202 and a detector 203. The elastic ring 202 is sleeved on the outer periphery of the ring body 1 and is axially confined between two limiting rings 3. The detector 203 is installed between the elastic ring 202 and the ring body 1 and is used to detect the pressure applied by the elastic ring 202. When friction wear occurs on the inner circumferential surface of the ring body 1, the elastic ring 202 uses its own elastic force to push the ring body 1 closer to the piston rod to maintain a tight fit. At this time, the elastic potential energy of the elastic ring 202 is released, causing the pressure value detected by the detector 203 to change accordingly, thereby realizing electronic warning.

[0024] As another preferred embodiment, in order to achieve self-lubrication of the friction surface to reduce noise, please refer to... Figure 2 The ring body 1 is also provided with a storage chamber 5, which is filled with solid lubricant. The storage chamber 5 is preferably located near the inner circumferential surface that contacts the piston rod, so that the heat generated by friction during operation can melt the solid lubricant.

[0025] As another preferred embodiment, for easier and more intuitive judgment of the degree of wear, please refer to... Figure 4 Multiple micro-grooves 201 are evenly distributed along the inner circumferential surface of the ring 1 that contacts the piston rod; the initial depth of the micro-grooves 201 can be calibrated according to the wear life preset by the guide ring.

[0026] As a preferred embodiment, to ensure the visual warning effect, the bright color layer 204 embedded inside the ring 1 has a bright color that contrasts sharply with the main color of the ring 1, ensuring that it can be easily observed when the bright color layer 204 is exposed.

[0027] Working principle: During installation, the guide ring is engaged with the grooves corresponding to the cylinder by two limiting rings 3 and limiting blocks 4. The limiting rings 3 prevent the guide ring from axial displacement, and the limiting blocks 4 prevent the guide ring from axial rotation. This stable fixing method is the basis for solving vibration and abnormal noise.

[0028] When the crane's luffing cylinder is working, the ring body 1 and the piston rod generate relative frictional motion. The heat generated by the friction melts the solid lubricant inside the storage chamber 5. The melted lubricant is applied to the friction surface, effectively reducing frictional noise. At the same time, the vibration generated during operation is absorbed by the rigid ring 7 and reinforcing plate 8 embedded inside the ring body 1. The composite material structure converts vibration energy into heat energy and dissipates it, achieving vibration reduction. If an axial impact occurs during the operation of the cylinder, the buffer cone 6 fixedly connected to the bottom of the ring body 1 will first bear the impact force and buffer it through its conical structure, further reducing impact noise and vibration.

[0029] With prolonged use, the inner circumferential surface of the guide ring 1 that contacts the piston rod will gradually wear down due to friction. The wear will first cause the uniformly distributed micro-grooves 201 on the surface to gradually become shallower until they are flattened. As the wear continues, the bright-colored layer 204 embedded inside will gradually become visible. Since the color of the bright-colored layer 204 is different from the main body color of the ring 1, maintenance personnel can intuitively judge the wear condition of the guide ring by observing the degree of flattening of the micro-grooves 201 and the degree of exposure of the bright-colored layer 204 during disassembly and inspection.

[0030] As wear occurs, the elastic ring 202, fitted around the outer periphery of the ring body 1, uses its elasticity to continuously push the wear surface of the ring body 1 closer to the piston rod, thereby achieving automatic clearance compensation. As the wear of the ring body 1 increases, the elastic ring 202 gradually extends, and its elasticity is released. The detector 203 installed therein detects this continuous change in pressure. By reading the data from the detector 203, the degree of wear can be determined without disassembly, thus providing early warning.

[0031] The surface color of the bright layer 204 is different from the main color of the ring 1. It is located inside the ring 1 and close to the side of the ring 1 that contacts the piston rod. The micro-grooves 201 are evenly distributed on the side of the ring 1 that contacts the piston rod. As the ring 1 and the piston rod rub against each other, the micro-grooves 201 will gradually be worn flat, and the bright layer 204 will gradually become visible. During routine disassembly and inspection, the wear level of the ring 1 can be intuitively judged by observing the degree of wear of the micro-grooves 201 and the degree of visibility of the bright layer 204. As the friction wears down the contact surface between the ring 1 and the piston rod, the elastic ring 202 located between the two limiting rings 3 will push the ring 1 to continuously approach the piston rod. As the elasticity of the elastic ring 202 is released, the pressure detected by the detector 203 changes. The wear level can be simply judged by the data detected by the detector 203, thereby achieving the intuitive warning effect of the warning mechanism 2.

Claims

1. A polyoxymethylene modified high-strength guide ring, comprising: Circular body (1); Two limiting rings (3) are spaced apart on the outer periphery of the ring body (1); And a limiting block (4) fixedly connected between the two limiting rings (3); The ring body (1) is characterized in that a rigid ring (7) and a reinforcing plate (8) are embedded inside it. A buffer cone (6) is fixedly connected to the side of the ring (1) facing the inside of the oil cylinder. The guide ring also includes a warning mechanism (2), which includes a bright layer (204) embedded inside the ring body (1) and a plurality of micro grooves (201) formed on the inner circumferential surface of the ring body (1) in contact with the piston rod.

2. The polyoxymethylene modified high-strength guide ring according to claim 1, characterized in that, The warning mechanism (2) further includes: an elastic ring (202), which is sleeved on the outer periphery of the ring body (1) and axially limited between the two limiting rings (3); And a detector (203) is installed between the elastic ring (202) and the ring body (1) and is used to detect the pressure applied by the elastic ring (202).

3. The polyoxymethylene modified high-strength guide ring according to claim 1, characterized in that, The ring (1) is also provided with a storage chamber (5), which is filled with solid lubricant.

4. The polyoxymethylene modified high-strength guide ring according to claim 1, characterized in that, The rigid ring (7) and the reinforcing plate (8) are made of composite materials.

5. The polyoxymethylene modified high-strength guide ring according to claim 1, characterized in that, The limiting block (4) is used to engage with a groove adapted on the cylinder wall to limit the axial rotation of the ring (1).

6. The polyoxymethylene modified high-strength guide ring according to claim 1, characterized in that, The color of the light layer (204) is different from the main color of the ring (1).

7. A polyoxymethylene modified high-strength guide ring according to claim 2, characterized in that, The elastic ring (202) is used to push the ring (1) closer to the piston rod by its elastic force when the inner circumferential surface of the ring (1) is worn.

8. The polyoxymethylene modified high-strength guide ring according to claim 1, characterized in that, The micro-grooves (201) are evenly distributed along the inner circumferential surface of the ring (1).

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