A magnetic columnar nail roller sleeve based on built-in permanent magnets

Abstract

The utility model discloses a kind of magnetic column nail roller sleeve based on built-in permanent magnet, it is related to roller mill roller sleeve technical field, including roller sleeve base body, sleeve is connected on roller shaft;Bar-shaped slot hole is opened in the inner circumferential of roller sleeve base body;Permanent magnet, installation is in bar-shaped slot hole;The same direction end of adjacent permanent magnet is opposite in magnetism;Plugging piece, plugging piece is installed in the end of permanent magnet, and can be detached and closed in the two side surfaces of roller sleeve base body;Column nail, evenly distributed in the surface of roller sleeve base body, to solve the technical problem that current magnetic material lacks non-contact mode to form protective material pad.

Description

Technical Field

[0001] This utility model relates to the field of roller sleeve technology for roller mills, specifically a magnetic pin roller sleeve based on a built-in permanent magnet. Background Technology

[0002] The pinned roller sleeve is a core, easily worn component of a roller mill. Its wear resistance is improved by embedding hard alloy pins into the roller sleeve base. The working principle of the pinned roller sleeve relies on the stable "cushion" layer formed on the roller surface when the material is rolled, so that abrasion mainly occurs between the cushion and the material to be ground, rather than directly acting on the pins and the roller sleeve base, thereby significantly improving its service life.

[0003] However, in actual operation, especially when the feeding is unstable, material characteristics (such as moisture, particle size, and grindability) fluctuate, or during start-up and shutdown, the formation of the material pad is often unstable and uneven, and even local "material pad detachment" occurs. This causes the pins and roller sleeve base to be directly exposed to the high-speed flowing hard material, resulting in abnormal breakage, loosening and detachment of the pins, and rapid wear of the base, which seriously shortens the roller sleeve life and increases equipment downtime and maintenance costs.

[0004] The existing pin roller is mainly composed of a roller sleeve base, pins and pin holes. The material accumulated between the pins forms a pad, realizing the grinding principle of "material grinding material", thereby reducing the direct wear between the pins and the roller sleeve base.

[0005] To address the issue of unstable material pads, passive methods such as adjusting process parameters (e.g., material properties, material pressure, hydraulic pressure) or optimizing the arrangement of roller pins are commonly used, but these methods have limited effectiveness and poor adaptability.

[0006] 1) Existing references arrange a large number of magnets on the surface of the roller sleeve. The dense installation method requires professional equipment or a lot of manual time for installation, so the equipment manufacturing cost is too high.

[0007] 2) Existing references show that magnets are placed on the surface of the rollers and are attracted and covered by magnetic materials. If the magnets extend beyond the surface of the roller sleeve, they will be ground inside the roller mill. If the magnets do not extend beyond the surface of the roller sleeve, they will be attracted to the surface of the magnets by magnetic materials, making it difficult to clean and remove the magnetic materials.

[0008] To address these issues, we provide a magnetic pin roller sleeve based on a built-in permanent magnet. Utility Model Content

[0009] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a magnetic pin roller sleeve based on a built-in permanent magnet to solve the technical problem that existing magnetic materials lack a non-contact method to form a protective pad.

[0010] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a magnetic column nail roller sleeve based on a built-in permanent magnet, comprising:

[0011] The roller sleeve base is fitted onto the roller shaft; a strip-shaped groove is formed in the circumferential direction within the roller sleeve base.

[0012] Permanent magnets are installed in strip-shaped slots; the same-direction ends of adjacent permanent magnets have opposite magnetic properties.

[0013] The sealing component is installed at the end of the permanent magnet and can be detachably closed on both sides of the roller sleeve base;

[0014] The studs are evenly distributed on the surface of the roller sleeve substrate.

[0015] In a further technical solution, the length of the permanent magnet is less than the length of the roller sleeve base;

[0016] The outer end of the sealing element is flush with the side of the roller sleeve base.

[0017] In a further technical solution, the sealing component includes a slotted blind plate, which is fixed to the roller sleeve base by screws.

[0018] The roller sleeve base has multiple sets of pin holes arranged on it, and each set of pin holes has pin holes arranged at equal intervals; pins are installed in the pin holes.

[0019] Multiple sets of strip-shaped slots are distributed circumferentially, with the center of the circle located on the central axis of the roller shaft; the number of the pin hole groups is greater than the number of strip-shaped slots;

[0020] In a further technical solution, a non-magnetic filling layer is used to fill the gap between the permanent magnet and the inner wall of the strip slot.

[0021] The distance from the slotted hole to the surface of the roller sleeve substrate is less than the distance from the slotted hole to the center line of the roller shaft.

[0022] In a further technical solution, the non-magnetic filling layer is an adhesive.

[0023] The structure of this utility model consists of a roller sleeve base, a strip-shaped slot, a permanent magnet, a slotted plate, a pin hole, and a pin. A strip-shaped slot is opened in the roller sleeve base, the permanent magnet is embedded in the slot and firmly sealed to ensure that the permanent magnet does not come into contact with the material, and then the pin is embedded in the roller sleeve base in a conventional manner.

[0024] During operation, the magnetic field on the surface of the roller sleeve substrate actively attracts ferromagnetic particles in the material, quickly forming a uniform, stable, and non-detachable protective pad. This pad effectively isolates the material from direct contact with the roller sleeve substrate, thereby significantly reducing wear and extending the service life of the roller sleeve substrate and the pins.

[0025] Compared with existing technologies, it has the following advantages:

[0026] This invention utilizes a built-in permanent magnet to generate a continuous magnetic field on the roller surface. When processing materials containing ferromagnetic substances, the magnetic field actively attracts these materials, quickly and stably forming a uniform and dense protective pad on the roller surface. This fundamentally solves the problem of unstable pads caused by feeding fluctuations and start-up / shutdown, greatly reducing direct wear and impact on the pins and substrate, and significantly improving the lifespan of the magnetic roller sleeve compared to traditional pin-mounted roller sleeve structures. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the magnetic pin roller sleeve of this utility model installed on the roller shaft;

[0028] Figure 2 This is a half-sectional schematic diagram of the roller sleeve base of this utility model;

[0029] Figure 3 This is a half-sectional schematic diagram of the roller sleeve base of this utility model (with sealing parts and permanent magnets installed).

[0030] Figure 4 This is a side view of the magnetic pin roller sleeve of this utility model installed on the roller shaft;

[0031] Figure 5 This is a side view of the permanent magnet of this utility model installed in a strip-shaped slot.

[0032] Figure 6 This is a schematic diagram of the magnetic poles of the permanent magnet in the roller sleeve substrate of this utility model;

[0033] Figure 7 This is a half-sectional schematic diagram of another type of roller sleeve base of this utility model (with sealing parts and permanent magnets installed).

[0034] In the picture:

[0035] 1. Roller sleeve base; 2. Strip groove; 3. Permanent magnet; 4. Column pin; 5. Groove blanking plate; 6. Column pin hole; 7. Non-magnetic filling layer; 100. Roller shaft. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] Example 1

[0038] Please see Figure 1-6 The present invention provides a technical solution for a magnetic pin roller sleeve based on a built-in permanent magnet, comprising:

[0039] like Figure 1 As shown, the roller sleeve base 1 is fitted onto the roller shaft 100; the roller sleeve base can be installed on the roller shaft using existing technologies, such as pressure method and temperature method, but attention needs to be paid to the interference fit. Figure 2 As shown, a strip-shaped groove 2 is provided in the inner circumferential direction of the roller sleeve base 1;

[0040] Permanent magnets 3 are installed within the strip-shaped slots 2; the ends of adjacent permanent magnets 3 in the same direction have opposite magnetic properties; permanent magnets are embedded within the strip-shaped slots 2, with the N and S poles of all permanent magnets arranged alternately to form a complete annular magnetic circuit. The cross-sectional shape of the strip-shaped slots can be circular, elliptical, or fan-shaped; in this embodiment, it is circular.

[0041] The sealing component is installed at the end of the permanent magnet 3 and can be detachably closed on both sides of the roller sleeve base 1;

[0042] The pins 4 are evenly distributed on the surface of the roller sleeve base 1. Figure 1 In this case, the number of the pin hole group is greater than the number of the strip slot hole 2.

[0043] like Figure 2 As shown, the length of the permanent magnet 3 is less than the length of the roller sleeve base 1; the outer end of the sealing component is flush with the side of the roller sleeve base 1. The sealing component includes a slotted blind plate 5, which is fixed to the roller sleeve base 1 by screws. Four sets of screws are respectively provided on the slotted blind plate for insertion and installation on the roller sleeve base.

[0044] Combination Figure 1 and Figure 2 As shown, multiple sets of pin holes are arranged on the roller sleeve base 1, and each set of pin holes has pin holes 6 arranged at equal intervals.

[0045] like Figure 3 As shown, a stud 4 is installed in the stud hole 6.

[0046] like Figure 5 The image shows a side view without the slotted end plate installed. Multiple sets of strip-shaped slots 2 are distributed circumferentially, with their centers located on the central axis of the roller 100. Figure 5 The diagram shows that the magnetic properties of each group of permanent magnets on this side are alternately arranged as N and S, so that the magnetic field on the surface of the roller sleeve substrate is uniformly distributed to form a complete annular magnetic circuit.

[0047] refer to Figure 4 and 5As shown, the distance from the strip-shaped slot 2 to the surface of the roller sleeve substrate 1 is less than the distance from the strip-shaped slot 2 to the center line of the roller shaft 100. The strip-shaped slot is located in the radial middle and slightly above the middle region of the roller sleeve substrate to ensure that the magnetic lines of force can penetrate evenly to the outer surface of the roller sleeve.

[0048] The structure of this utility model consists of a roller sleeve base, a strip-shaped slot, a permanent magnet, a slotted plate, a pin hole, and a pin. A strip-shaped slot is opened in the roller sleeve base, the permanent magnet is embedded in the slot and firmly sealed to ensure that the permanent magnet does not come into contact with the material, and then the pin is embedded in the roller sleeve base in a conventional manner.

[0049] This invention utilizes a built-in permanent magnet to generate a continuous magnetic field on the roller surface. When processing materials containing ferromagnetic substances, the magnetic field actively attracts these materials, quickly and stably forming a uniform and dense protective pad on the roller surface. This fundamentally solves the problem of pad instability caused by feeding fluctuations and start-up / shutdown, greatly reducing direct wear and impact on the pins and the base, and significantly improving the lifespan of the magnetic roller sleeve compared to traditional pin-mounted roller sleeve structures. By placing strip-shaped slots inside the roller sleeve base and arranging them in a circumferential array, a uniformly distributed magnetic field covering the entire working surface can be formed. This avoids excessively strong or weak local magnetic fields, ensuring the uniformity of the pad thickness.

[0050] The opening of the slotted hole is sealed by a slotted hole baffle and a sealing element. The surface of the slotted hole baffle is flush with the inner wall of the roller sleeve base, forming a closed cavity to prevent dust from entering.

[0051] Example 2

[0052] like Figure 7 As shown, another embodiment of this utility model is presented. Based on embodiment 1, the gap between the permanent magnet 3 and the inner wall of the strip-shaped slot 2 is filled with a non-magnetic filling layer 7. This serves to fix the permanent magnet and prevent it from vibrating and shifting, and also acts as a buffer layer to prevent the permanent magnet from breaking due to impact. The non-magnetic filling layer 7 is an adhesive.

[0053] Process plan: After the roller shaft and roller sleeve base are assembled and the studs are inlaid, the permanent magnets are installed.

[0054] The inner wall of the processed slot is cleaned, deburred, and blown to ensure that there are no metal shavings or oil stains, providing a clean surface for the installation of the permanent magnet.

[0055] Arrange the N and S poles of the permanent magnet alternately and place them one by one into the cleaned slot. Use high-performance adhesive to fill the slot, ensuring that all gaps between the permanent magnet and the slot are fully filled. Seal the slot opening with a slot cover plate and sealant or a sealant, and then fasten it with screws.

[0056] The magnetic field strength was measured on the working surface of the roller sleeve substrate using a gaussmeter to verify whether its uniformity and strength met the design requirements.

[0057] The magnetic strength of this invention is rationally designed to be used only for adsorbing and stabilizing the innermost material pad, and its adsorption force is much less than the rolling pressure of the roller press. Under the action of the rolling pressure, the material is normally crushed and discharged, without causing problems such as "uncrushable" or "unable to unload".

[0058] To ensure the stability and reliability of the permanent magnet under rotating, impact, and vibration operating environments, adhesive is injected into the gap between the permanent magnet and the inner wall of the slot to form a non-magnetic filling layer. This filling layer firmly bonds and encapsulates the permanent magnet within the slot, while also serving a cushioning function.

[0059] The opening of the slotted hole is sealed by a slotted hole baffle, sealant and sealing element. The surface of the slotted hole baffle is flush with the inner wall of the roller sleeve base to form a closed cavity to prevent dust from entering.

[0060] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A magnetic pin roller sleeve based on a built-in permanent magnet, characterized in that, include: A roller sleeve base (1) is sleeved on a roller shaft (100); a strip-shaped groove (2) is provided in the inner circumferential direction of the roller sleeve base (1); Permanent magnet (3) is installed in the strip slot (2); the magnetic properties of the same-direction ends of adjacent permanent magnets (3) are opposite; The sealing component is installed at the end of the permanent magnet (3) and can be detachably closed on both sides of the roller sleeve base (1); The pins (4) are evenly distributed on the surface of the roller sleeve substrate (1).

2. The magnetic pin roller sleeve based on a built-in permanent magnet according to claim 1, characterized in that, The length of the permanent magnet (3) is less than the length of the roller sleeve base (1); The outer end of the sealing element is flush with the side of the roller sleeve base (1).

3. A magnetic pin roller sleeve based on a built-in permanent magnet according to claim 2, characterized in that, The sealing component includes a slotted blind plate (5), which is fixed to the roller sleeve base (1) by screws.

4. A magnetic pin roller sleeve based on a built-in permanent magnet according to claim 2, characterized in that, The roller sleeve base (1) has multiple sets of pin holes arranged on it, and each set of pin holes has pin holes (6) arranged at equal intervals; a pin (4) is installed in the pin hole (6).

5. A magnetic pin roller sleeve based on a built-in permanent magnet according to claim 4, characterized in that, Multiple sets of strip slots (2) are distributed in a circular pattern, with the center of the circle located on the central axis of the roller (100); the number of the pin hole groups is greater than the number of strip slots (2).

6. A magnetic pin roller sleeve based on a built-in permanent magnet according to claim 5, characterized in that, The distance from the strip groove (2) to the surface of the roller sleeve substrate (1) is less than the distance from the center line of the strip groove (2) to the roller shaft (100).

7. A magnetic pin roller sleeve based on a built-in permanent magnet according to claim 4, characterized in that, A non-magnetic filling layer is provided in the gap between the permanent magnet (3) and the inner wall of the strip slot (2).

8. A magnetic pin roller sleeve based on a built-in permanent magnet according to claim 7, characterized in that, The non-magnetic filler layer (7) is an adhesive.

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