Wear-resistant composite roller sleeve

Abstract

The utility model relates to the technical field of composite roller sleeves, in particular to an anti-abrasion composite roller sleeve. The wear-resistant composite roller sleeve comprises a rubber roller sleeve, a ceramic wear-resistant sleeve is fixedly embedded in the outer sleeve surface of the rubber roller sleeve, a plurality of mounting holes which are annularly distributed and axially formed are formed in the rubber roller sleeve, and butt joint cavities with the diameter larger than that of the mounting holes are formed in orifices of the two ends of the mounting holes. Each mounting hole is internally provided with a plurality of steel balls and filled with metal sand, and the two ends of each mounting hole are each provided with a pressure buffering assembly. According to the anti-abrasion composite roller sleeve, the metal sand absorbs vibration energy through plastic deformation, the steel balls disperse local stress through rolling, the metal sand and the steel balls cooperate to reduce the peak value of the internal stress of the rubber layer, and the wedge-shaped columns in the pressure buffering assemblies are in transition fit with the contraction type transition cavity openings and matched with the elastic restoring force of the springs; and the position of the plugging disc can be dynamically adjusted, and the buffering effect is enhanced while metal sand is prevented from leaking.

Description

Technical Field

[0001] This utility model relates to the field of composite roller sleeve technology, and in particular to an anti-wear composite roller sleeve. Background Technology

[0002] Composite roller sleeves, as core components of industrial roller pressing equipment, are widely used in metallurgy, mining, building materials, and other fields. Their performance directly affects the working efficiency and service life of the equipment. Traditional composite roller sleeves mostly adopt a single material or a simple double-layer composite structure, such as welding a wear-resistant alloy layer or embedding ceramic blocks on the surface of a metal substrate. However, such structures have significant defects in practical applications: First, the difference in the thermal expansion coefficients between the metal substrate and the wear-resistant layer can easily lead to stress concentration at the interface, which can easily cause cracking and peeling under alternating loads; Second, a single wear-resistant material is difficult to balance high hardness and impact resistance, and ceramic materials, although wear-resistant, are brittle and prone to cracking under severe impact conditions; In addition, the periodic internal stress generated by the roller sleeve when pressing materials can easily cause fatigue damage to the rubber layer, leading to early failure of the overall structure. In existing technologies, some improvement schemes attempt to alleviate stress by filling with buffer materials (such as elastic particles or liquid damping media), but problems such as uneven filling and material settling or leakage after long-term use exist.

[0003] Therefore, it is necessary to provide a new wear-resistant composite roller sleeve to solve the above-mentioned technical problems. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an anti-wear composite roller sleeve.

[0005] The wear-resistant composite roller sleeve provided by this utility model includes a rubber roller sleeve, and a ceramic wear-resistant sleeve is fixedly fitted on the outer surface of the rubber roller sleeve. The rubber roller sleeve has a plurality of annularly distributed and axially arranged mounting holes, and both ends of the mounting holes have a mating cavity with a diameter larger than the mounting hole.

[0006] Each of the mounting holes is provided with several steel balls and filled with metal sand, and pressure relief components are installed at both ends of the mounting holes.

[0007] The pressure relief assembly includes a wedge-shaped post, which is inserted into the mounting hole and slidably connected to the mounting hole. A connecting rod is fixedly installed at the small-diameter end of the wedge-shaped post. The other end of the connecting rod extends into the docking cavity and is fixedly installed with a sealing disc. A spring is sleeved on the connecting rod.

[0008] Preferably, one end of the spring is fixedly connected to the inner wall of the docking cavity, and the other end of the spring is fixedly connected to the inner wall of the sealing disc.

[0009] Preferably, the outer ring wall of the sealing disc abuts against the inner wall of the docking cavity.

[0010] Preferably, the mounting hole has a shrinkable transition cavity at both ends, and the diameter of the shrinkable transition cavity decreases from the mounting hole to the mating cavity.

[0011] Preferably, the wedge-shaped post is fitted with a contractile transition cavity.

[0012] Preferably, the steel balls and metal sand are arranged at intervals.

[0013] Compared with related technologies, the wear-resistant composite roller sleeve provided by this utility model has the following beneficial effects:

[0014] This invention utilizes the metal sand to absorb vibration energy through plastic deformation, while the steel balls disperse local stress through rolling. Together, they reduce the peak stress within the rubber layer. The wedge-shaped column in the pressure-relief component, in conjunction with the contractile transition cavity, and the elastic restoring force of the spring, can dynamically adjust the position of the sealing disc, preventing metal sand leakage while enhancing the buffering effect. Attached Figure Description

[0015] Figure 1 A schematic diagram of a preferred embodiment of the wear-resistant composite roller sleeve provided by this utility model;

[0016] Figure 2 for Figure 1 A schematic cross-sectional view of the rubber roller sleeve shown.

[0017] Figure 3 for Figure 2 The diagram shows an enlarged view of the pressure-relief component.

[0018] The following are the labels in the diagram: 1. Rubber roller sleeve; 1a. Mounting hole; 1a1. Shrinkable transition cavity; 1b. Butt joint cavity; 2. Steel ball; 3. Metal sand; 4. Pressure relief component; 41. Wedge-shaped column; 42. Butt joint rod; 43. Sealing disc; 44. Spring; 5. Ceramic wear-resistant sleeve. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0021] Please see Figures 1 to 3This utility model provides an anti-wear composite roller sleeve, which includes a rubber roller sleeve 1, steel balls 2, metal sand filling 3, pressure-relieving components 4, and a ceramic wear-resistant sleeve 5. The outer surface of the rubber roller sleeve 1 is fixedly fitted with the ceramic wear-resistant sleeve 5, thereby improving the wear resistance of the rubber roller sleeve 1. In order to avoid the problem that the ceramic sleeve 5 may be damaged due to local impact under extreme working conditions, a carbon fiber reinforced rubber layer can be added between the ceramic wear-resistant sleeve 5 and the rubber roller sleeve 1 to improve the interface shear resistance.

[0022] In the embodiments of this utility model, please refer to Figures 1 to 3 The rubber roller sleeve 1 has several ring-shaped and axially arranged mounting holes 1a. Both ends of the mounting holes 1a have mating cavities 1b with a diameter larger than that of the mounting holes 1a. Each mounting hole 1a contains several steel balls 2 and is filled with metal sand 3. The steel balls 2 and the metal sand 3 are arranged alternately.

[0023] It should be noted that when the rubber roller sleeve 1 is installed on the roller body and presses and conveys the object as the roller body rotates, the rubber roller sleeve 1 is deformed under pressure. At this time, the part of the mounting hole 1a filled with metal sand 3 is compressed, causing the metal sand 3 to extend to both sides of the mounting hole 1a and abut against the steel ball 2. Since the metal sand 3 can undergo plastic deformation to absorb vibration energy, the metal sand 3 on both sides will deform to buffer the impact amplitude of the steel ball 2, thereby reducing the internal stress generated by the rubber roller sleeve 1 due to the pressing of the material. This can significantly reduce the peak internal stress of the rubber roller sleeve 1 during operation and improve the service life and durability of the rubber roller sleeve 1.

[0024] In the embodiments of this utility model, please refer to Figure 2 and Figure 3 A shrinkable transition cavity 1a1 is provided at both ends of the mounting hole 1a, and the diameter of the shrinkable transition cavity 1a1 decreases from the mounting hole 1a towards the docking cavity 1b. A pressure-relieving component 4 is installed at both ends of the mounting hole 1a, and the pressure-relieving component 4 includes a wedge-shaped post 41. The wedge-shaped post 41 is inserted into the mounting hole 1a and slidably connected to the mounting hole 1a. The wedge-shaped post 41 is transitionally fitted with the shrinkable transition cavity 1a1, and a docking rod 42 is fixedly installed at the small diameter end of the wedge-shaped post 41. The other end of the docking rod 42 extends into the docking cavity 1b and a sealing disc 43 is fixedly installed thereon. The outer ring wall of the sealing disc 43 abuts against the inner wall of the docking cavity 1b. A spring 44 is sleeved on the docking rod 42. One end of the spring 44 is fixedly connected to the inner wall of the docking cavity 1b, and the other end of the spring 44 is fixedly connected to the inner disc wall of the sealing disc 43.

[0025] It should be noted that when the rubber roller sleeve 1 is driven by the pressing of the material to move the metal sand 3 and steel ball 2 to both sides of the mounting hole 1a, the wedge-shaped column 41 is pushed outward by the connecting rod 42 to seal the plate 43 after being pressed, thereby stretching the spring 44. Therefore, the metal sand 3 and steel ball 2, together with the spring 44, further weaken the internal stress of the rubber roller sleeve 1 when it is pressed.

[0026] Among them, since the diameter of the shrinkage transition cavity 1a1 decreases from the mounting hole 1a to the docking cavity 1b, and the wedge-shaped post 41 is fitted with the shrinkage transition cavity 1a1, the hidden danger of metal sand 3 and steel ball 2 leaking out of the shrinkage transition cavity 1a1 is effectively avoided.

[0027] It is worth noting that spring 44 is made of high fatigue strength disc spring or shape memory alloy spring to improve durability.

[0028] In this application, a ceramic wear-resistant sleeve 5 is embedded in the rubber roller sleeve 1, which combines the elasticity of rubber with the high wear resistance of ceramic. At the same time, the ceramic sleeve 5 avoids the risk of interface peeling through fixed fitting. Steel balls 2 and metal sand 3 are arranged alternately in the mounting hole 1a. The metal sand 3 absorbs vibration energy through plastic deformation, while the steel balls 2 disperse local stress through rolling. The two work together to reduce the peak stress in the rubber layer. The wedge-shaped column 41 in the pressure relief component 4 is fitted with the shrinkage transition cavity 1a1. With the elastic restoring force of the spring 44, the position of the sealing disc 43 can be dynamically adjusted to prevent the metal sand 3 from leaking out while enhancing the buffering effect.

[0029] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An abrasion resistant composite roll cover characterized by, Includes a rubber roller sleeve (1), the outer surface of which is fixedly fitted with a ceramic wear-resistant sleeve (5), and the rubber roller sleeve (1) has several annularly distributed and axially arranged mounting holes (1a) inside, and both ends of the mounting holes (1a) have mating cavities (1b) with a diameter larger than that of the mounting holes (1a). Each of the mounting holes (1a) is provided with several steel balls (2) and filled with metal sand (3), and pressure relief components (4) are installed at both ends of the mounting holes (1a); The pressure relief assembly (4) includes a wedge-shaped post (41), which is inserted into the mounting hole (1a) and slidably connected to the mounting hole (1a). A docking rod (42) is fixedly installed at the small diameter end of the wedge-shaped post (41). The other end of the docking rod (42) extends into the docking cavity (1b) and is fixedly installed with a sealing disc (43). A spring (44) is sleeved on the docking rod (42).

2. The anti-wear composite roll cover of claim 1, wherein, One end of the spring (44) is fixedly connected to the inner wall of the docking cavity (1b), and the other end of the spring (44) is fixedly connected to the inner wall of the sealing disc (43).

3. The anti-wear composite roll cover of claim 2, wherein, The outer ring wall of the sealing disc (43) abuts against the inner wall of the docking cavity (1b).

4. The anti-wear composite roll cover of claim 1, wherein, The mounting hole (1a) has a shrinkable transition cavity (1a1) at both ends, and the diameter of the shrinkable transition cavity (1a1) decreases from the mounting hole (1a) toward the docking cavity (1b).

5. The anti-wear composite roll cover of claim 4, wherein, The wedge-shaped column (41) is fitted with the contraction transition cavity (1a1).

6. The anti-wear composite roll cover of claim 1, wherein, The steel balls (2) and the metal sand (3) are arranged alternately.

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