A composite wear-resistant raymond mill grinding roller for nanobiomaterial grinding

Abstract

The utility model relates to powder processing equipment technical field, concretely relates to a kind of composite wear-resistant Raymond mill grinding roller for nanometer biological material grinding, including grinding roller matrix, and the working surface of grinding roller matrix is provided with composite wear-resistant layer, and composite wear-resistant layer includes hard insert and steel matrix, and hard insert is embedded in steel matrix with predetermined geometric pattern, and the wear resistance of hard insert is higher than steel matrix.The utility model can overcome uniform wear defect, maintain stable and efficient grinding performance in long-term work.

Description

Technical Field

[0001] This utility model relates to the field of powder processing equipment technology, specifically to a composite wear-resistant Raymond mill roller for grinding nano-biomaterials. Background Technology

[0002] Sintered and hardened ceramic-biochar composite particles need to be pulverized into fine powder with a specific target particle size range using a Raymond mill. The Raymond mill is a key piece of equipment used in mineral processing, building materials, and chemical industries for powder preparation. It relies on the grinding rollers to crush the material between the grinding rings under centrifugal force. As a core wear component, the wear resistance and operational stability of the Raymond mill rollers directly determine the equipment's production efficiency and operating costs.

[0003] Currently, the Raymond mill grinding rollers commonly used in the industry are mostly cast from high-chromium cast iron as a single piece, or their wear resistance is improved by surface overlaying with hard alloy. These traditional structures perform well in the initial stages of service, but with the accumulation of working time, their entire working surface undergoes uniform wear, leading to a gradual decrease in surface roughness and eventually a smooth surface. This uniform wear causes a significant reduction in the biting and shearing ability between the grinding roller and the material, resulting in a sharp decline in grinding efficiency. To maintain powder fineness and output, frequent shutdowns are necessary to replace the grinding rollers, which not only increases component wear costs but also seriously affects the continuity and overall efficiency of the production line.

[0004] Therefore, there is an urgent need in the field for a new type of grinding roller structure that can overcome the defects of uniform wear and maintain stable and efficient grinding performance during long-term operation. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a composite wear-resistant Raymond mill roller for grinding nano-biomaterials, so as to solve the problem of grinding efficiency reduction caused by uniform wear of existing Raymond mill rollers.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A composite wear-resistant Raymond mill roller for grinding nanobiomaterials includes a roller substrate, on the working surface of which a composite wear-resistant layer is provided. The composite wear-resistant layer includes a hard insert and a steel substrate. The hard insert is embedded in the steel substrate in a predetermined geometric pattern, and the wear resistance of the hard insert is higher than that of the steel substrate.

[0008] As a further embodiment of this utility model, the predetermined geometric pattern is a plurality of V-shaped patterns arranged circumferentially along the grinding roller substrate.

[0009] As a further embodiment of this utility model, the predetermined geometric pattern is a plurality of double helix patterns arranged circumferentially along the grinding roller substrate.

[0010] As a further embodiment of this utility model, the steel substrate and the grinding roller substrate are integral structures formed by casting.

[0011] As a further embodiment of this invention, the hard insert has a frustum-shaped structure.

[0012] As a further embodiment of this invention, the rigid insert is fixed in the steel substrate by mechanical interference fit.

[0013] As a further embodiment of this invention, the hard insert and the steel substrate are also bonded together by a brazing layer.

[0014] As a further embodiment of this invention, the working surface of the hard insert protrudes from the working surface of the steel substrate.

[0015] By adopting the above technical solution, this utility model will have the following beneficial effects:

[0016] First, the use of a composite wear-resistant layer consisting of hard inserts and a steel matrix fundamentally alters the wear mechanism of the grinding roller's working surface. The hard inserts bear the primary grinding action, and their extremely high wear resistance ensures the durability of this core function; while the more resilient steel matrix provides reliable support and allows for moderate wear. This structure enables differentiated wear on the grinding roller surface, rather than the uniform flattening of the entire surface achieved in traditional structures.

[0017] Secondly, the hard inserts are embedded in the matrix with a predetermined geometric pattern, ensuring that the wear process is controlled and orderly. As the steel matrix wears slightly, the high-hardness hard inserts can maintain a relatively raised state, which is equivalent to forming countless microscopic, constantly self-revealing sharp edges on the surface of the grinding roller, producing a lasting self-sharpening effect.

[0018] Compared with existing Raymond mill grinding rollers, this invention effectively overcomes the defect of significant reduction in grinding efficiency caused by uniform wear, and can stably maintain high-efficiency grinding performance over an ultra-long working cycle. It greatly reduces the frequency of downtime and replacement due to grinding roller failure, thereby significantly improving the production continuity and overall economic benefits of the equipment. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a perspective view of Example 1;

[0021] Figure 2 This is a front view of Example 1;

[0022] Figure 3 This is a perspective view of Example 2 with the hard insert hidden.

[0023] Figure 4 This is a top view of Example 2 with the hard block hidden.

[0024] The correspondence between the labels and component names in the attached figures is as follows:

[0025] 1. Grinding roller base; 2. Steel base; 3. Hard insert. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1

[0028] refer to Figure 1 and Figure 2 The composite wear-resistant Raymond mill grinding roller for grinding nano-biomaterials provided in this embodiment includes an existing grinding roller base 1, which is typically a frustum cone shape and is cast from ZG40CrMnMoBRe high-strength alloy steel. Its structure matches the installation requirements of conventional Raymond mills (such as the 4R3216 type) in the field.

[0029] The key is that, to achieve differentiated wear, a composite wear-resistant layer is formed on the working surface of the aforementioned grinding roller substrate 1. This composite wear-resistant layer includes a steel substrate 2 and hard inserts 3. The hard inserts 3 are embedded in the steel substrate 2 in a predetermined geometric pattern, and the wear resistance of the hard inserts 3 is higher than that of the steel substrate 2. Specifically, it is prepared through the following steps:

[0030] First, a groove array with a specific geometric pattern is machined on the outer surface of the cast grinding roller base 1 using a CNC milling machine. In this embodiment, the pattern is preferably a plurality of V-shaped patterns arranged circumferentially along the grinding roller base 1, thereby forming the steel base 2. The steel base 2 and the grinding roller base 1 are a cast integral structure, ensuring overall mechanical strength. Looking from the centerline of the grinding roller base 1 to both sides, the V-shaped grooves are mirror-symmetrical. This causes the axial thrust on the material to cancel each other out when the grinding roller rotates, thereby preventing material from accumulating at one end and stabilizing the grinding zone.

[0031] Next, a hard insert 3 adapted to the shape of the groove is prepared. This hard insert 3 can be made of ultra-high hardness materials such as tungsten carbide (WC), zirconium oxide (ZrO2), or alumina (Al2O3), and its shape is preferably frustum-shaped to facilitate embedding. The prepared hard inserts 3 are pressed one by one into the groove of the steel substrate 2 using a mechanical interference fit. To further enhance the bonding strength and prevent the hard inserts 3 from falling off under high-speed impact, brazing filler metal can be pre-placed in the groove before pressing, followed by brazing in a protective atmosphere furnace to form a strong brazed layer between the hard insert 3 and the steel substrate 2.

[0032] Finally, the working surface of the installed grinding roller is finely ground. After fine grinding, ensure that the working surface of the hard insert 3 slightly protrudes from the working surface of the steel substrate 2, with the protrusion controlled between 0.1 and 0.3 mm. This structure ensures that the contact force of the grinding operation is preferentially applied to the high-hardness insert. Optionally, the exposed steel substrate portion can be nitrided to further enhance its auxiliary wear resistance.

[0033] In this embodiment, during operation, the wear rate of the lower-hardness steel substrate 2 is slightly higher than that of the ultra-high-hardness hard insert 3. This differentiated wear allows the hard insert 3 to maintain a relatively raised state, forming a durable micro-grinding edge, thereby effectively overcoming the efficiency reduction problem caused by uniform wear of traditional grinding rollers and significantly extending its high-efficiency working life.

[0034] Example 2

[0035] refer to Figure 3 and Figure 4 The composite wear-resistant Raymond mill grinding roller for grinding nanobiomaterials provided in this embodiment differs from that in Embodiment 1 in that the predetermined geometric pattern is a plurality of double helix patterns arranged circumferentially along the roller substrate 1. The double helix consists of two parallel, evenly spaced spiral lines. When the grinding roller rotates, this helical structure generates a unidirectional pushing force along the roller axis, which helps guide the material from one end of the roller to the other, promoting material circulation and discharge.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A composite wear-resistant Raymond mill roller for grinding nanomaterials, comprising a roller substrate (1), characterized in that, A composite wear-resistant layer is provided on the working surface of the grinding roller substrate (1). The composite wear-resistant layer includes a steel substrate (2) and a hard insert (3). The hard insert (3) is embedded in the steel substrate (2) in a predetermined geometric pattern, and the wear resistance of the hard insert (3) is higher than that of the steel substrate (2).

2. The composite wear-resistant Raymond mill roller for grinding nano-biomaterials according to claim 1, characterized in that, The predetermined geometric pattern is a plurality of V-shaped patterns arranged circumferentially along the grinding roller substrate (1).

3. The composite wear-resistant Raymond mill roller for grinding nano-biomaterials according to claim 1, characterized in that, The predetermined geometric pattern is a plurality of double helix patterns arranged circumferentially along the grinding roller substrate (1).

4. The composite wear-resistant Raymond mill roller for grinding nano-biomaterials according to claim 1, characterized in that, The steel substrate (2) and the grinding roller substrate (1) are integral structures formed by casting.

5. The composite wear-resistant Raymond mill roller for grinding nano-biomaterials according to claim 1, characterized in that, The hard insert (3) has a frustum-shaped structure.

6. The composite wear-resistant Raymond mill roller for grinding nanobiomaterials according to any one of claims 1 to 5, characterized in that, The rigid insert (3) is mechanically interference-fitted into the steel substrate (2).

7. The composite wear-resistant Raymond mill roller for grinding nanomaterials according to claim 6, characterized in that, The hard insert (3) is also bonded to the steel substrate (2) by a brazing layer.

8. The composite wear-resistant Raymond mill roller for grinding nanobiomaterials according to any one of claims 1 to 5, characterized in that, The working surface of the hard insert (3) protrudes from the working surface of the steel substrate (2).

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