Hammer disc structure of large crusher

Abstract

The utility model relates to a hammer disc structure of a large crusher, and relates to the technical field of crusher parts. The hammer disc structure comprises a hammer core and a disc body, a mounting hole is formed in the middle of the hammer core, the disc body is fixedly connected to the periphery of the hammer core, a wear-resisting ring is arranged on the peripheral face of the disc body in a hooping mode, and the wear-resisting ring is formed by rolling a wear-resisting plate and fixedly connected to the peripheral face of the disc body. According to the hammer disc structure, the abrasion resistance is enhanced, the service life of the hammer disc structure is prolonged, the hammer disc structure is convenient to install, accurate and reliable, meanwhile, the procedure of hammer disc outer circle surfacing in an original technology is omitted, the technology difficulty is reduced, and the welding time is saved.

Description

Technical Field

[0001] The present application relates to the technical field of crusher parts, and in particular to a hammer plate structure of a large crusher. Background Art

[0002] A crusher is a pulverizing machine that breaks large materials into small particles by squeezing, hammering or bending. Crushing operations are often divided into coarse crushing, medium crushing and fine crushing according to the size of the feed and discharge particles. Commonly used crushers include jaw crushers, gyratory crushers, cone crushers, roll crushers, hammer crushers and impact crushers.

[0003] Hammer crusher is one of the most commonly used types of crushers. Hammer crusher crushes materials in the form of impact. It can directly crush materials with a maximum particle size of 600-1800 mm into particles of 25 or less. Hammer crusher is suitable for medium and fine crushing of materials with medium hardness, such as limestone, slag, coke, coal, etc. in cement, chemical, electric power, metallurgy and other industrial sectors.

[0004] Hammer crushers usually include a rotating shaft, a hammer disc and a hammer head. The hammer disc is mounted on the rotating shaft, and the hammer head is movably mounted on the hammer disc. The hammer head is driven to rotate rapidly through the rotating shaft and the hammer disc, and the kinetic energy of the hammer head is used to hammer the material at high speed to achieve the crushing function. The hammer head is usually made of high-strength wear-resistant materials to increase its service life. Since the hammer disc will also contact the material, and the hammer disc and the material will generate a large impact force and friction between each other, the hammer disc is also a collar component that is easily worn, especially its outer peripheral surface needs special protection.

[0005] In the related art, in order to enhance the wear resistance of the hammer disc, a cladding electrode is used to evenly clad the outer circumference of the entire hammer disc. However, this method has the problems of complex welding, easy wear of the wear-resistant layer, need for regular maintenance and short service life. Utility Model Content

[0006] In order to improve the wear resistance and service life of the crusher hammer disc and reduce the difficulty of its manufacturing process, the present application provides a hammer disc structure of a large crusher.

[0007] The hammer plate structure of the large crusher provided in this application adopts the following technical solution:

[0008] A hammer disc structure of a large crusher includes a hammer core and a disc body, wherein the hammer core has a mounting hole in the middle, the disc body is fixedly connected to the outer periphery of the hammer core, and a wear-resistant ring is hooped on the outer periphery of the disc body, the wear-resistant ring is formed by rolling a wear-resistant plate and is fixedly connected to the outer periphery of the disc body.

[0009] When manufacturing the hammer core and the disc body, they can be manufactured according to the traditional method and processed by a boring and milling machine to meet the size requirements of the drawing; then the wear-resistant plate is rolled into a hoop, which is sleeved on the outer circumference of the disc body, and the wear-resistant plate is fixedly connected to the outer circumference of the disc body to form a wear-resistant ring. This application completely abandons the traditional method of increasing the wear resistance of the outer circumference of the disc body by welding with welding rods. By adopting the above technical solution, the wear resistance of the hammer disc structure is enhanced, the service life of the hammer disc structure is improved, and the installation is convenient, accurate and reliable. At the same time, the process of welding the outer circle of the hammer disc in the original process is eliminated, which reduces the process difficulty and saves welding time.

[0010] Optionally, the width of the wear-resistant ring is greater than the thickness of the disc body, and both sides of the wear-resistant ring protrude from the side surfaces of the disc body.

[0011] The outer surface of the disc is the most likely place to collide violently with the material. By adopting the above technical solution, the size of the wear-resistant ring is large enough to improve the impact resistance, thereby increasing the service life of the wear-resistant ring. In order to save costs, the disc is usually made of manganese steel or high manganese steel, whose wear resistance is not as good as that of the wear-resistant ring. By making the wear-resistant ring protrude from the side of the disc, the wear-resistant ring can play a certain protective role on the disc, reduce the impact of the material on the side of the disc, thereby increasing the service life of the entire disc.

[0012] Optionally, the wear-resistant ring is fixedly connected to the outer peripheral surface of the disc body by means of groove welding.

[0013] The main purpose of groove opening is to achieve complete penetration. In addition, it can also adjust the composition and performance of the weld, improve the crystallization conditions, and improve the performance of the joint. By adopting the above technical solution, the disc body and the wear-resistant ring can be quickly, stably and reliably connected into one, ensuring the stability and reliability of the connection between the two.

[0014] Optionally, the outer surface of the disk body has a plurality of threaded holes distributed along its circumference, and the axial directions of all the threaded holes are arranged along the radial direction of the disk body; the wear-resistant ring is provided with step holes arranged one-to-one corresponding to the threaded holes, and the step holes are inserted with fastening bolts that can be screwed into the corresponding threaded holes.

[0015] By adopting the above technical solution, the wear-resistant ring and the disc body are fastened by multiple fastening bolts, which makes assembly more convenient. The connection structure can be used in combination with welding, that is, the wear-resistant ring and the disc body are first fastened by fastening bolts, and then the connection between the two is strengthened by welding. The wear-resistant ring and the disc body can also be fastened by fastening bolts alone.

[0016] Optionally, the disk body is provided with a plurality of connection holes for mounting the hammer head distributed along its circumference, and the threaded holes and the connection holes are staggered so that any one of the threaded holes is located between two adjacent connection holes.

[0017] By adopting the above technical solution, the connecting hole is convenient for installing the hammer head, and the threaded hole and the connecting hole are staggered to ensure the strength of the disc body.

[0018] Optionally, the hammer core and the disc body are integrally cast or welded with high manganese steel, and the wear-resistant ring is made of Weldon wear-resistant steel plate.

[0019] By adopting the above technical solution, it is possible to ensure sufficient strength while taking the manufacturing cost into comprehensive consideration, thereby achieving the best cost-effectiveness.

[0020] Optionally, the mounting hole is a square hole, and a wedge insertion groove is provided on at least one side wall of the mounting hole, the wedge insertion groove extends along the axial direction of the disk body, and two ends of the wedge insertion groove pass through two sides of the hammer core.

[0021] A square column with a square cross-section is provided on the rotating shaft corresponding to the square hole. By adopting the above technical scheme, the square column on the rotating shaft is inserted into the mounting hole to drive the hammer core and the disk body. By inserting a wedge block into the wedge slot, the tightness of the assembly of the rotating shaft and the hammer core can be ensured and the shaking can be reduced; at the same time, the assembly size requirements of the rotating shaft and the mounting hole are reduced, thereby reducing the process difficulty.

[0022] Optionally, the thickness of the hammer core is greater than the thickness of the disc body.

[0023] By adopting the above technical solution, when the hammer core is connected to the rotating shaft, the hammer core can bear a larger torque.

[0024] Optionally, the number of the connection holes is four, six or eight, all of the connection holes are evenly spaced along the circumference of the disk body and are located close to the outer circumferential surface of the disk body.

[0025] By adopting the above technical solution, the hammering force and working efficiency of the hammer head can be guaranteed, and the strength of the entire hammer disc structure can be guaranteed.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. The hammer disc structure in the present application enhances wear resistance and increases the service life of the hammer disc structure.

[0028] 2. The hammer disc structure in this application is easy to install, accurate and reliable.

[0029] 3. The hammer disc structure in the present application eliminates the process of surfacing welding the outer circle of the hammer disc in the original process, reduces the process difficulty, and saves welding time. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the installation and use status of the hammer disc structure in Example 1 of the present application.

[0031] Figure 2 It is a front view schematic diagram of the hammer disc structure in Example 1 of the present application.

[0032] Figure 3 It is a schematic cross-sectional structural diagram of the hammer disc structure in Example 2 of the present application.

[0033] In the figure:

[0034] 10. Hammer core; 11. Mounting hole; 12. Wedge slot;

[0035] 20. disc body; 21. connecting hole; 22. threaded hole;

[0036] 30. Wear-resistant ring; 31. Step hole;

[0037] 40. Rotating shaft;

[0038] 50. Hammer head;

[0039] 60. Tighten the bolts. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1 -Attached Figure 3 , further details of this application are given.

[0041] Example 1

[0042] The hammer disc structure in this embodiment is mainly used in large crushers, especially large hammer crushers. The hammer disc structure is used in conjunction with the rotating shaft 40 and the hammer head 50. Figure 1 and Figure 2As shown, a hammer disc structure of a large crusher includes a hammer core 10 and a disc body 20. The hammer core 10 has a mounting hole 11 in the middle. The mounting hole 11 is a square hole. A wedge slot 12 is provided on at least one side wall of the mounting hole 11. In the present application, the wedge slot 12 is preferably provided on two adjacent side walls. The wedge slot 12 extends along the axial direction of the disc body 20 and the two ends of the wedge slot 12 pass through the two sides of the hammer core 10. A square column with a square cross section is provided on the rotating shaft 40 corresponding to the square hole. The square column on the rotating shaft 40 is inserted into the mounting hole 11, and one end of the rotating end is connected to a driving part such as a motor, so as to drive the hammer core 10 to rotate. By inserting a wedge block into the wedge slot 12, the tightness of the assembly of the rotating shaft 40 and the hammer core 10 can be ensured, and the shaking can be reduced; at the same time, the assembly size requirements of the rotating shaft 40 and the mounting hole 11 are reduced, and the process difficulty is reduced.

[0043] Reference Figure 1 and Figure 2 As shown, the disc body 20 is fixedly connected to the outer periphery of the hammer core 10. When manufacturing the hammer core 10 and the disc body 20, the hammer core 10 and the disc body 20 are integrally cast or welded with high manganese steel. They can be manufactured according to the traditional method and processed by a boring and milling machine to meet the size requirements of the drawing, which is low in cost; the thickness of the hammer core 10 is greater than the thickness of the disc body 20. When the hammer core 10 is connected to the rotating shaft 40, the hammer core 10 can bear a larger torque.

[0044] Reference Figure 1 and Figure 2 As shown, a wear-resistant ring 30 is provided on the outer circumference of the disk body 20, and the wear-resistant ring 30 is formed by rolling a wear-resistant plate and fixedly connected to the outer circumference of the disk body 20. During production, the wear-resistant plate is rolled into a hoop, which is sleeved on the outer circumference of the formed disk body 20, and the wear-resistant plate is fixedly connected to the outer circumference of the disk body 20, thereby forming the wear-resistant ring 30. In the present application, the wear-resistant ring 30 is fixedly connected to the outer circumference of the disk body 20 by groove welding. The main purpose of the groove is to achieve complete penetration. In addition, the composition and performance of the weld can be adjusted, the crystallization conditions can be improved, and the joint performance can be improved. The disk body 20 and the wear-resistant ring 30 can be fixedly connected into one quickly, stably and reliably, ensuring the stability and reliability of the connection between the two.

[0045] In the present application, the width of the wear ring 30 is greater than the thickness of the disc body 20, and both sides of the wear ring 30 protrude from the side of the disc body 20. The wear ring 30 is made of a wear-resistant steel plate. The size specification can be Hardox 600, and its thickness range is 8 mm to 50 mm. The hardness can meet the impact toughness requirements of HBW570-640. The entire hammer disc structure can ensure sufficient strength while taking into account the manufacturing cost, thereby achieving the best cost performance.

[0046] Reference Figure 2As shown, the disc body 20 in the present application is provided with a plurality of connection holes 21 for installing the hammer head 50 along its circumference, and the number of the connection holes 21 may be four, six or eight, and all the connection holes 21 are evenly spaced along the circumference of the disc body 20 and the connection holes 21 are located close to the outer peripheral surface of the disc body 20. The hammer head 50 is movably connected to the disc body 20 through a pin inserted in the connection hole 21. When the disc body 20 rotates at a high speed, the hammer head 50 is driven to rotate, and its kinetic energy generates a large impact force for crushing materials. The hammer head 50 installed on the disc body 20 can be cast with a high chromium manganese steel composite material, or it can be made of the material of the wear-resistant ring 30 in the present application.

[0047] The implementation principle is as follows: the outer peripheral surface of the disc body 20 is the place that is most likely to produce violent collisions with the material. The wear-resistant ring 30 needs to have sufficient impact resistance, and the traditional welding rod surfacing is restricted by the welding process and has certain limitations in the selection of wear-resistant materials. The technical solution in this application uses Hardox wear-resistant steel plates to form a wear-resistant layer, completely abandoning the traditional welding rod surfacing method to increase the wear resistance of the outer peripheral surface of the disc body 20. The wear resistance of the hammer disc structure is enhanced, the service life of the hammer disc structure is increased, and the installation is convenient, accurate and reliable. At the same time, the process of surfacing the outer circle of the hammer disc in the original process is eliminated, the process difficulty is reduced, and the welding time is saved. The problem of insufficient wear resistance and limited service life of the hammer disc structure in the prior art is solved, and the manufacturing process and materials can be optimized at the same time, achieving a significant improvement in the durability of the hammer disc. After experimental measurement, the service life of the improved hammer disc structure is more than doubled compared with the traditional hammer disc.

[0048] Example 2

[0049] Reference Figure 3 As shown, this embodiment is substantially the same as embodiment 1, except that, in this embodiment, a plurality of threaded holes 22 are distributed along the circumference of the outer circumference of the disk body 20, and the axial directions of all the threaded holes 22 are arranged along the radial direction of the disk body 20; the threaded holes 22 and the connecting holes 21 are staggered so that any threaded hole 22 is located between two adjacent connecting holes 21, and this arrangement ensures the strength of the disk body 20; the wear-resistant ring 30 is provided with step holes 31 arranged one-to-one corresponding to the threaded holes 22, and the step holes 31 are inserted with fastening bolts 60 that can be screwed into the corresponding threaded holes 22.

[0050] The implementation principle is as follows: In this embodiment, the wear-resistant ring 30 and the disc body 20 are fastened by multiple fastening bolts 60, which is convenient for assembly. The connection structure can be used in combination with welding, that is, the wear-resistant ring 30 and the disc body 20 are first fastened by fastening bolts 60, and then the connection between the two is strengthened by welding. The wear-resistant ring 30 and the disc body 20 can also be fastened by fastening bolts 60 alone.

[0051] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A hammer disc structure of a large crusher, comprising a hammer core (10) and a disc body (20), wherein the hammer core (10) has a mounting hole (11) in the middle, and the disc body (20) is fixedly connected to the outer periphery of the hammer core (10), characterized in that: A wear-resistant ring (30) is provided on the outer circumference of the disk body (20), and the wear-resistant ring (30) is formed by rolling a wear-resistant plate and is fixedly connected to the outer circumference of the disk body (20); a plurality of threaded holes (22) are distributed along the circumference of the outer circumference of the disk body (20), and the axial directions of all the threaded holes (22) are arranged along the radial direction of the disk body (20); the wear-resistant ring (30) is provided with step holes (31) arranged one-to-one corresponding to the threaded holes (22), and a fastening bolt (60) capable of being screwed into the corresponding threaded hole (22) is inserted into the step hole (31).

2. The hammer plate structure of a large crusher according to claim 1, characterized in that: The width of the wear-resistant ring (30) is greater than the thickness of the disc body (20), and both sides of the wear-resistant ring (30) protrude from the side surfaces of the disc body (20).

3. The hammer plate structure of a large crusher according to claim 1 or 2, characterized in that: The wear-resistant ring (30) is fixedly connected to the outer peripheral surface of the disc body (20) by means of groove welding.

4. The hammer plate structure of a large crusher according to claim 1, characterized in that: The disc body (20) is provided with a plurality of connection holes (21) for mounting the hammer head (50) distributed along its circumference, and the threaded holes (22) and the connection holes (21) are staggered so that any one of the threaded holes (22) is located between two adjacent connection holes (21).

5. The hammer plate structure of a large crusher according to claim 1 or 2, characterized in that: The hammer core (10) and the disc body (20) are made of high-manganese steel by integral casting or welding, and the wear-resistant ring (30) is made of Welded wear-resistant steel plate.

6. The hammer plate structure of a large crusher according to claim 1 or 2, characterized in that: The mounting hole (11) is a square hole, and a wedge insertion groove (12) is provided on at least one side wall of the mounting hole (11). The wedge insertion groove (12) extends along the axial direction of the disk body (20), and the two ends of the wedge insertion groove (12) pass through the two sides of the hammer core (10).

7. The hammer plate structure of a large crusher according to claim 1 or 2, characterized in that: The thickness of the hammer core (10) is greater than the thickness of the disc body (20).

8. The hammer plate structure of a large crusher according to claim 4, characterized in that: The number of the connection holes (21) is four, six or eight, all the connection holes (21) are evenly spaced and distributed along the circumference of the disc body (20), and the positions of the connection holes (21) are close to the outer circumferential surface of the disc body (20).

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