Wear-resistant structure of crushing disc of impact mill

Abstract

The utility model discloses a wear-resistant structure of a crushing disc of an impact mill, which comprises a hammerhead disc, a plurality of hammerheads are arranged at the edge of one side of the hammerhead disc along the circumferential direction at equal intervals, a mounting groove is arranged at each hammerhead on one side of the hammerhead disc, wear-resistant sheets are arranged in the mounting grooves, the hammerheads are arranged on the wear-resistant sheets, and the wear-resistant sheets are arranged on the hammerhead disc. According to the utility model, the wear-resistant sheet is arranged at the hammerhead of the hammerhead disc and acts on the wear trace of the hammerhead disc, so that the wear resistance of the hammerhead disc at the tail part of the hammerhead is greatly improved, the service life of the hammerhead disc is prolonged, and the wear-resistant sheet, the hammerhead and the hammerhead disc are connected, mounted and fixed through the fastening bolt; and when the wear-resistant sheet or the hammer head is worn and the use performance is influenced, the fastening bolt can be loosened, and the wear-resistant sheet or the hammer head can be detached for replacement, so that the maintenance is simple and convenient, the cost is low, and the replaceable performance and the continuous use performance are good.

Description

Technical Field

[0001] This utility model relates to the field of impact mill pulverizing disc technology, specifically to a wear-resistant structure for an impact mill pulverizing disc. Background Technology

[0002] In the field of dry ultrafine grinding of solid materials, impact mills are widely used grinding equipment. The hammer disc is its core grinding component. Multiple hammers are fixedly connected at equal intervals along the circumference of the outer ring of the hammer disc, and the hammers and wear-resistant liners form a grinding pair. During operation, the hammer disc drives the hammers to rotate at high speed under the drive of an electric motor, causing the material to be ground to collide, rub, and shear between the grinding pairs to achieve grinding.

[0003] In the prior art, the impact mill grinding disc includes a hammer disc 1 and multiple hammers 2 installed at the top edge of the hammer disc 1. A stator liner 3 is installed inside the impact mill housing corresponding to the hammers 2. During operation, the hammer disc rotates at high speed, and a pressure difference is generated between the head a (outer end in the radial direction) and the tail b (inner end in the radial direction) of the hammers 2. The pressure at the tail b is lower than that at the head a, which will generate at the hammers 2. Figure 4 The radial local vortex shown is beneficial for the circulation and crushing of materials in the crushing zone. However, when the material particles return to the tail of the hammer 2, they are also subjected to the tangential force and friction generated by the rotation of the hammer disk 1. The material particles will slide on the tail of the hammer 2 on the hammer disk 1, causing wear on the hammer disk 1 at that point. This leads to premature scrapping of the hammer disk 1 due to wear, and the wear traces are shown below. Figure 5 As shown. To reduce the wear of the hammerhead disc and improve its service life, industry scientists have adopted various measures, such as lengthening the hammers, using multiple rows of hammers, and welding multiple hard alloy wear-resistant plates to the tail of the hammers on the hammerhead disc. These measures have played a positive role in reducing the wear of the hammerhead disc. However, the first two measures increase the power consumption of the crusher while keeping the production capacity unchanged. The third measure requires predicting the wear area and determining the position of the hard alloy wear-resistant plates to be welded. At the same time, it increases the manufacturing difficulty of the hammerhead disc and the cost is high. Therefore, it is necessary to design a wear-resistant structure for the impact mill crushing disc to solve the shortcomings in the above-mentioned background technology. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a wear-resistant structure for an impact mill grinding disc. By installing wear-resistant plates at the hammerhead of the hammer disc, the wear-resistant plates act on the wear lines of the hammer disc, thereby greatly improving the wear resistance of the hammer disc at the tail of the hammerhead and extending the service life of the hammer disc.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] The utility model provides a wear -resisting structure of impact mill crushing disc, including hammer head disc, the edge of one side of hammer head disc is installed with a plurality of hammer heads along the circumferential direction equal interval, is located at every hammer head one side of hammer head disc and is equipped with the mounting groove, is installed with wear -resisting piece in the mounting groove, the hammer head is installed on wear -resisting piece.

[0007] As the preferred embodiment of the utility model, the wear -resisting piece includes an installation part and a wear part, the wear -resisting piece is in T-shaped structure, and the mounting groove is in T-shaped structure matched with the wear -resisting piece.

[0008] As the preferred embodiment of the utility model, the wear part of the wear -resisting piece extends from both ends of the installation part, the wear part is provided with a c end close to the turning end of the hammer head disc, and the wear part is provided with a d end at the other end.

[0009] As the preferred embodiment of the utility model, the length of the d end of the wear part is greater than twice the length of the c end.

[0010] As the preferred embodiment of the utility model, the thickness of the wear -resisting piece is same with the depth of the mounting groove.

[0011] As the preferred embodiment of the utility model, the installation part of the wear -resisting piece is provided with a positioning groove, and the positioning groove is used for positioning the hammer head.

[0012] As the preferred embodiment of the utility model, the hammer head is provided with a counterbore, the positioning groove of the installation part is provided with two connecting holes corresponding to the position of the counterbore, the hammer head disc is provided with mounting holes corresponding to the position of the connecting holes, and the wear -resisting piece and the hammer head are connected and fixed with the hammer head disc through the fastening bolt in sequence through the counterbore, the connecting hole and the mounting hole.

[0013] As the preferred embodiment of the utility model, the wear -resisting piece is made of high-hardness hard alloy.

[0014] Compared with the prior art, the utility model has the advantages of:

[0015] 1、the utility model discloses a wear -resisting piece is installed at the hammer head of hammer head disc, and the wear -resisting piece acts on the wear trace of hammer head disc, so that the wear resistance of the tail of hammer head disc is greatly improved, and the service life of hammer head disc is improved.

[0016] 2、the utility model discloses a fastening bolt is used for connecting and installing and fixing wear -resisting piece and hammer head with hammer head disc, when wear -resisting piece or hammer head is worn and influences the use performance, can loosen the fastening bolt, and the wear -resisting piece or hammer head is replaced, and the maintenance is simple, and the cost is low, and has good replaceable performance and continuous use performance. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Fig. 1 is a schematic view of the overall structure of the wear-resistant structure of the impact mill pulverizing disc;

[0018] Figure 2 Fig. 2 is a schematic view of the overall structure of the wear-resistant structure of the impact mill pulverizing disc; Figure 1 Fig. 3 is a sectional view along the A-A plane of the impact mill pulverizing disc;

[0019] Figure 3 Fig. 4 is a schematic view of the split structure of the wear-resistant sheet and the hammer head;

[0020] Figure 4 Fig. 5 is a schematic view of the vortex trajectory structure of the hammer head disc in operation in the prior art;

[0021] Figure 5 Fig. 6 is a schematic view of the wear trajectory structure of the hammer head disc after wear in the prior art.

[0022] In the drawings: 1, hammer head disc; 2, hammer head; 21, counterbore; 3, stator lining plate; 4, wear-resistant sheet; 41, mounting portion; 411, positioning groove; 412, connecting hole; 42, wear portion; 421, c end; 422, d end; 5, fastening bolt. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without any creative labor fall within the scope of protection of the present application.

[0024] Embodiment: Please refer to Figures 1-3 The present embodiment provides a wear-resistant structure of an impact mill pulverizing disc, which comprises a hammer head disc 1, a plurality of hammer heads 2 are installed at the edge of one side of the hammer head disc 1 at equal intervals in the circumferential direction, a mounting groove is formed at each hammer head 2 on one side of the hammer head disc 1, a wear-resistant sheet 4 is installed in the mounting groove, and the hammer head 2 is installed on the wear-resistant sheet 4. By installing the wear-resistant sheet 4 at the hammer head 2 of the hammer head disc 1, the wear resistance of the hammer head disc 1 at the tail portion of the hammer head 2 is greatly improved, and the service life of the hammer head disc is improved.

[0025] In the present embodiment, the material of the wear-resistant sheet 4 is high-hardness hard alloy, which has very high hardness and can reach more than 90 on the Mohs scale, and has excellent wear resistance, especially can maintain good red hardness at high temperature, and the hardness at 600℃ can still be higher than that of high-speed steel at room temperature. In other embodiments, the wear-resistant sheet 4 can also be other wear-resistant materials.

[0026] In the present embodiment, as Figure 3As shown, the wear-resistant sheet 4 includes a mounting portion 41 and a wear portion 42, both ends of the wear portion 42 of the wear-resistant sheet 4 extend out of the mounting portion 41, the end of the wear portion 42 close to the turning direction of the hammer head disc 1 is set as the c end, the other end of the wear portion 42 is set as the d end, the length of the c end of the wear portion 42 is less than the length of the d end, and the wear-resistant sheet 4 is fixed on the hammer head disc 1 through the mounting portion 41. Figure 5 In the prior art, the wear trace of the hammer head disc occurs at the tail of the hammer head 2 and is worn backward along the turning direction of the hammer head 2. Therefore, through the design of the wear portion 42 of the wear-resistant sheet 4, the present embodiment can well act on the wear trace of the hammer head disc 1 to achieve the best wear-resistant protection effect with a small cost and improve the service life of the hammer head disc.

[0027] Further, the length of the d end of the wear portion 42 is more than twice the length of the c end, and the specific length of the wear portion 42 can be set according to actual use requirements, such as the rotation speed of the hammer head disc 1 and the characteristics of the crushed materials.

[0028] In the present embodiment, the wear-resistant sheet 4 is in a T-shaped structure, the mounting groove is in a T-shaped structure matched with the wear-resistant sheet 4, the T-shaped mounting groove is pre-formed on the hammer head disc 1, the shape of the mounting groove is matched with the shape of the wear-resistant sheet 4, the positioning and assembly of the wear-resistant sheet 4 on the hammer head disc 1 are facilitated, the thickness of the wear-resistant sheet 4 is the same as the depth of the mounting groove, the outer surface of the wear-resistant sheet 4 is flush with the side surface of the hammer head disc 1, and a step structure is avoided to prevent the materials from being hindered and retained at the position.

[0029] In the present embodiment, as shown in the figure, Figure 3 the mounting portion 41 of the wear-resistant sheet 4 is provided with a positioning groove 411, the positioning groove 411 is used for positioning and clamping the hammer head 2, the positioning groove 411 is pre-formed on the wear-resistant sheet 4, the shape of the positioning groove 411 is matched with the shape of the hammer head 2, the positioning and assembly of the hammer head 2 and the wear-resistant sheet 4 are facilitated, and the positioning accuracy of the installation of the hammer head 2 and the wear-resistant sheet 4 is ensured to greatly improve the assembly efficiency.

[0030] In the present embodiment, as shown in the figure, Figure 3 the hammer head 2 is provided with a counterbore 21, the positioning groove 411 of the mounting portion 41 is internally provided with two connecting holes 412 corresponding to the positions of the counterbore 21, the hammer head disc 1 is provided with mounting holes corresponding to the positions of the connecting holes 412, the wear-resistant sheet 4 and the hammer head 2 are connected and fixed with the hammer head disc 1 through the fastening bolts 5 in sequence through the counterbore 21, the connecting holes 412 and the mounting holes, the fastening bolts 5 are used for connecting and fixing the wear-resistant sheet 4 and the hammer head 2 with the hammer head disc 1, when the wear-resistant sheet 4 or the hammer head 2 is worn and affects the use performance, the fastening bolts 5 can be loosened, and the wear-resistant sheet 4 or the hammer head 2 can be removed and replaced, so that the maintenance is simple and the cost is low, and the wear-resistant sheet 4 and the hammer head 2 have good replaceable performance and continuous use performance.

[0031] Working principle: in use, by pre-opening installation groove at the hammer head 2 of the hammer head disc 1, the wear-resistant sheet 4 is installed and clamped into the installation groove, then the hammer head 2 is installed and clamped into the positioning groove 411 pre-opened on the wear-resistant sheet 4, the wear-resistant sheet 4 and the hammer head 2 are connected and fixed with the hammer head disc 1 through the fastening bolt 5 in sequence through the counterbore 21, the connecting hole 412 and the mounting hole, so that the wear resistance of the hammer head disc 1 at the tail of the hammer head 2 is greatly improved, the material is prevented from producing wear to the hammer head disc 1 at the place, the service life of the hammer head disc is improved, and when the wear-resistant sheet 4 or the hammer head 2 is worn and influences the use performance, the fastening bolt 5 can be loosened, the wear-resistant sheet 4 or the hammer head 2 is disassembled and replaced, maintenance is simple, cost is low, and good replaceable performance and continuous use performance are obtained.

[0032] The above embodiment is a preferred implementation scheme of the utility model, in addition, the utility model can be realized in other ways, and any obvious replacement without departing from the technical scheme concept is within the protection scope of the utility model.

Claims

1. A wear-resistant structure of an impact mill grinding disc, comprising a hammer head disc (1), a plurality of hammer heads (2) are installed at the edge of one side of the hammer head disc (1) at equal intervals in the circumferential direction, characterized in that: The hammer head disc (1) is provided with an installation groove on one side of each hammer head (2), and a wear-resistant sheet (4) is installed in the installation groove.

2. A wear structure for an impact mill pulverizing pan according to claim 1, characterized in that: The wear-resistant sheet (4) comprises an installation part (41) and a wear part (42), and the wear-resistant sheet (4) is in a T-shaped structure.

3. A wear structure for an impact mill pulverizing pan according to claim 2, characterized in that: The wear part (42) of the wear-resistant sheet (4) extends out of the installation part (41) at both ends, one end of the wear part (42) close to the turning direction of the hammer head disc (1) is provided as a c end, and the other end of the wear part (42) is provided as a d end, the length of the c end of the wear part (42) is less than the length of the d end.

4. A wear structure for an impact mill pulverizing pan according to claim 3, characterized in that: The length of the d end of the wear part (42) is more than twice the length of the c end.

5. The wear resistant construction of an impact mill pulverizing disc of claim 2, wherein: The thickness of the wear-resistant sheet (4) is the same as the depth of the installation groove.

6. A wear structure for an impact mill pulverizing pan according to claim 2, wherein: The installation part (41) of the wear-resistant sheet (4) is provided with a positioning groove (411), and the positioning groove (411) is used for positioning and clamping the hammer head (2).

7. A wear structure for an impact mill pulverizing pan according to claim 6, characterized in that: The hammer head (2) is provided with a counterbore (21), the positioning groove (411) of the installation part (41) is provided with two connecting holes (412) corresponding to the position of the counterbore (21), the hammer head disc (1) is provided with an installation hole corresponding to the position of the connecting hole (412), and the wear-resistant sheet (4) and the hammer head (2) are connected and fixed with the hammer head disc (1) through a fastening bolt (5) in sequence through the counterbore (21), the connecting hole (412) and the installation hole.

8. The wear structure of the impact mill grinding disc according to claim 1, characterized in that: The material of the wear-resistant sheet (4) is high-hardness hard alloy.

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