High-pressure crushing roller for secondary pre-tightening and fastening of roller skin

Abstract

The utility model belongs to the technical field of mining machinery, and particularly discloses a high-pressure crushing roller with a roller skin secondarily pre-tightened and fastened, which comprises a roller shaft, a roller sleeve and the roller skin, the roller sleeve is fixedly sleeved on the roller shaft, and a primary pre-tightening structure and a secondary tightening structure are arranged between the roller skin and the roller sleeve. The roller skin is detachably and stably connected to the roller sleeve in a sleeving mode through the primary pre-tightening structure and the secondary fastening structure. According to the utility model, the compression disc is pressed against the first annular bulge and the second annular bulge, so that the roller skin is pre-tightened and positioned once, and the roller skin is prevented from displacing when the compression block group is assembled; the pressing block set is pressed between the first annular abutting face and the second annular abutting face in an abutting mode, secondary fastening is formed, the displacement failure rate of the roller skin is effectively reduced, the maintenance cost is reduced, the service life of the roller skin is prolonged, then the failure rate and energy consumption of the high-pressure rolling crusher are reduced, and the service life of the whole equipment is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of mining machinery technology, specifically relating to a high-pressure crushing roller with secondary pre-fastening of the roller skin. Background Technology

[0002] Secondary pre-tightening of the roller skin is a crusher roller installation method applicable to various types of machinery in metallurgy, construction, road building, etc., and is widely used in mining, smelting, building materials, highways, railways, water conservancy, and chemical industries. Secondary pre-tightening of the roller skin features high safety performance, economy, and reliability, making it suitable for various types of machinery.

[0003] Currently, in high-pressure roller crushers used in mining, the roller skin only undergoes simple clamping relative to the main shaft assembly during rotation. There is no substantial secondary positioning of the roller skin, and the traditional clamping positioning method is not conducive to stable rotation, causing axial displacement of the roller skin, as well as axial displacement of the opposing rotating roller skin. This increases uneven wear of the rotating roller skin, reduces its service life, and increases the load on the main machine.

[0004] To address the problem of unstable roller skin installation and axial displacement in existing technologies, it is necessary to improve the structure of the crushing roller to solve the current technical issues. Utility Model Content

[0005] The purpose of this invention is to provide a high-pressure crushing roller with secondary pre-fastening of the roller skin, which can provide a certain positioning protection for the roller skin of the high-pressure roller crusher during rotation. It has high economic performance, can effectively improve the roller skin life of the crusher, and reduce energy consumption.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a high-pressure crushing roller with secondary pre-tightening of the roller skin, comprising a roller shaft, a roller sleeve and a roller skin, wherein the roller sleeve is fixedly sleeved on the roller shaft, and a primary pre-tightening structure and a secondary fastening structure are provided between the roller skin and the roller sleeve, wherein the roller skin is detachably and stably sleeved on the roller sleeve through the primary pre-tightening structure and the secondary fastening structure.

[0007] To better realize this utility model, the side of the roller sleeve has a first annular protrusion and a first annular contact surface, and the diameter of the first annular contact surface gradually decreases from the first annular protrusion to the end face of the roller sleeve.

[0008] To better realize this utility model, the inner ring of the roller skin has a second annular protrusion and a second annular abutting surface. The diameter of the second annular protrusion is the same as that of the first annular protrusion, and the diameter of the second annular abutting surface gradually increases from the second annular protrusion to the end face of the roller skin.

[0009] To better realize this utility model, one end of the first annular protrusion has a positioning protrusion, and the second annular protrusion has the same height as the positioning protrusion.

[0010] To better realize this utility model, the primary pre-tightening structure includes a pressure plate, which is detachably connected to the end of the roller sleeve away from the positioning protrusion, and simultaneously presses against the first annular protrusion and the second annular protrusion.

[0011] To better realize this utility model, the first annular abutment surface and the second annular abutment surface are formed with tapered annular grooves.

[0012] To better realize this utility model, the secondary fastening structure includes a clamping block assembly. The clamping block assembly has a taper adapted to the annular groove. There are two sets of clamping blocks, which are detachably connected to both ends of the first annular protrusion and simultaneously press against the first annular contact surface and the second annular contact surface.

[0013] To better realize this utility model, the clamping block assembly is a ring structure, which is formed by circumferentially splicing multiple arc-shaped clamping block units.

[0014] Beneficial effects:

[0015] This invention uses a clamping disc to tightly press against the first and second annular protrusions, pre-tightening and positioning the roller skin to prevent displacement during the assembly of the clamping block assembly. Subsequently, clamping block assemblies are installed from both ends of the roller sleeve. These assemblies are composed of multiple arc-shaped clamping block units circumferentially spliced ​​together, facilitating hoisting and installation. High-strength bolts are used to fix the clamping block units between the first and second annular contact surfaces, forming a secondary tightening. Since both the first and second annular contact surfaces have a certain inclination, they form a tapered groove. Under the pressure of the clamping block assembly, the roller skin displacement failure rate is effectively reduced, maintenance costs are lowered, and the roller skin's service life is increased. This, in turn, reduces the failure rate and energy consumption of the high-pressure roller crusher, extending the overall lifespan of the equipment. Therefore, this design effectively replaces the traditional roller skin positioning method, avoiding the problems of uneven roller skin wear, axial force imbalance, and unstable main machine movement caused by restricted roller skin positioning. Attached Figure Description

[0016] Figure 1 This is a front structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the AA cross-section of this utility model;

[0018] Figure 3 This is a schematic diagram of the roller sleeve structure of this utility model;

[0019] Figure 4 This is a structural diagram of the roller skin of this utility model;

[0020] Figure 5 This is a structural diagram of the clamping disc of this utility model;

[0021] Figure 6 This is a structural diagram of the clamping block assembly of this utility model.

[0022] In the figure: 1. Roller shaft; 2. Roller sleeve; 21. First annular protrusion; 22. Positioning protrusion; 23. First annular contact surface; 3. Roller skin; 31. Second annular protrusion; 32. Second annular contact surface; 4. Primary pre-tightening structure; 41. Pressure plate; 5. Secondary fastening structure; 51. Pressure block; 52. Pressure block unit; 6. High-strength bolt; 7. Threaded hole; 8. Through hole; 9. Annular groove. Detailed Implementation

[0023] Example

[0024] like Figure 1 - Figure 6 As shown, a high-pressure crushing roller with a secondary pre-tightened roller skin 3 includes a roller shaft 1, a roller sleeve 2, and a roller skin 3. The roller sleeve 2 is fixedly sleeved on the roller shaft 1. The side of the roller sleeve 2 has a first annular protrusion 21 and a first annular abutment surface 23. The diameter of the first annular abutment surface 23 gradually decreases from the first annular protrusion 21 to the end face of the roller sleeve 2. The inner ring of the roller skin 3 has a second annular protrusion 31 and a second annular abutment surface 32. The diameter of the second annular protrusion 31 is the same as that of the first annular protrusion 21, and the diameter of the second annular abutment surface 32 gradually increases from the second annular protrusion 31 to the end face of the roller skin 3. One end of the first annular protrusion 21 has a positioning protrusion 22, and the second annular protrusion 31 has the same height as the positioning protrusion 22.

[0025] A primary pre-tightening structure 4 and a secondary fastening structure 5 are provided between the roller skin 3 and the roller sleeve 2. The roller skin 3 is detachably and stably sleeved onto the roller sleeve 2 through the primary pre-tightening structure 4 and the secondary fastening structure 5. The primary pre-tightening structure 4 includes a pressure plate 41, which is detachably connected to the end of the roller sleeve 2 away from the positioning protrusion 22 by a high-strength bolt 6, and simultaneously presses against the first annular protrusion 21 and the second annular protrusion 31. The secondary fastening structure 5 includes a set of clamping blocks 51. The first annular abutment surface 23 and the second annular abutment surface 32 form a tapered annular groove 9. The set of clamping blocks 51 has a tapered shape that matches the annular groove 9. There are two sets of clamping blocks 51, which are detachably connected to the two ends of the first annular protrusion 21 by high-strength bolts 6, and simultaneously press against the first annular abutment surface 23 and the second annular abutment surface 32. Correspondingly, the roller sleeve 2 is provided with threaded holes 7 for connecting the high-strength bolts 6. The clamping plate 41 and the set of clamping blocks 51 are provided with through holes 8 for the high-strength bolts 6 to pass through. The set of clamping blocks 51 is an annular structure, which is formed by circumferentially splicing multiple arc-shaped clamping block units 52.

[0026] The working principle of this application can be summarized as follows:

[0027] First, the roller shaft 1 is installed on the corresponding bearing seat and driven to rotate by the drive motor. The roller sleeve 2 is fixedly installed on the roller shaft 1. The roller skin 3 is first inserted from the end of the first annular protrusion 21 that does not have the positioning protrusion 22 until the second limiting protrusion abuts against the positioning protrusion 22. At this time, the ends of the second protrusion and the first protrusion away from the positioning protrusion 22 are flush. Then, the through hole 8 on the pressure plate 41 is aligned with the threaded hole 7 on the roller sleeve 2. The pressure plate 41 is first fixed on the roller sleeve 2 by the high-strength bolt 6. During the continuous tightening of the high-strength bolt 6, the pressure plate 41 will press tightly against the first annular protrusion 21 and the second annular protrusion 31, so that the roller skin 3 is pre-tightened and positioned to prevent the roller skin 3 from shifting when assembling the pressure block 51 group.

[0028] Subsequently, clamping blocks 51 sets are installed from both ends of the roller sleeve 2. Each clamping block set is composed of multiple arc-shaped clamping block units 52 circumferentially spliced ​​together, facilitating hoisting and installation. High-strength bolts 6 are used to fix the clamping block units 52 between the first annular contact surface 23 and the second annular contact surface 32, forming a secondary tightening. Since both the first and second annular contact surfaces 23 and 32 have a certain inclination, they form a tapered annular groove 9. Under the pressure of the clamping blocks 51 sets, the displacement failure rate of the roller skin 3 can be effectively reduced, thereby reducing maintenance costs, increasing the service life of the roller skin 3, and further reducing the failures and energy consumption of the high-pressure roller crusher, thus extending the overall service life of the equipment. This design effectively replaces the traditional roller skin 3 positioning method, avoiding the problem of uneven wear of the roller skin 3 due to restricted positioning, resulting in uneven axial force loading and unstable main machine movement.

[0029] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A high-pressure crushing roller with secondary pre-fastening of the roller skin, comprising a roller shaft (1), a roller sleeve (2), and a roller skin (3), characterized in that, The roller sleeve (2) is fixedly sleeved on the roller shaft (1). A primary pre-tightening structure (4) and a secondary fastening structure (5) are provided between the roller skin (3) and the roller sleeve (2). The roller skin (3) is detachably and stably sleeved on the roller sleeve (2) through the primary pre-tightening structure (4) and the secondary fastening structure (5).

2. The high-pressure crushing roller with secondary pre-fastening of the roller skin according to claim 1, characterized in that, The side of the roller sleeve (2) has a first annular protrusion (21) and a first annular contact surface (23), the diameter of which gradually decreases from the first annular protrusion (21) to the end face of the roller sleeve (2).

3. A high-pressure crushing roller with secondary pre-fastening of the roller skin according to claim 2, characterized in that, The inner ring of the roller skin (3) has a second annular protrusion (31) and a second annular contact surface (32). The second annular protrusion (31) has the same diameter as the first annular protrusion (21), and the diameter of the second annular contact surface (32) gradually increases from the second annular protrusion (31) to the end face of the roller skin (3).

4. A high-pressure crushing roller with secondary pre-fastening of the roller skin according to claim 3, characterized in that, One end of the first annular protrusion (21) has a positioning protrusion (22), and the second annular protrusion (31) has the same height as the positioning protrusion (22).

5. A high-pressure crushing roller with secondary pre-fastening of the roller skin according to claim 4, characterized in that, The primary pre-tightening structure (4) includes a pressure plate (41), which is detachably connected to the end of the roller sleeve (2) away from the positioning protrusion (22) and simultaneously presses against the first annular protrusion (21) and the second annular protrusion (31).

6. A high-pressure crushing roller with secondary pre-fastening of the roller skin according to claim 3, characterized in that, The first annular abutment surface (23) and the second annular abutment surface (32) form a tapered annular groove (9).

7. A high-pressure crushing roller with secondary pre-fastening of the roller skin according to claim 6, characterized in that, The secondary fastening structure (5) includes a set of clamping blocks (51), which has a taper adapted to the annular groove (9). There are two sets of clamping blocks (51), which are detachably connected to the two ends of the first annular protrusion (21) and simultaneously press against the first annular contact surface (23) and the second annular contact surface (32).

8. A high-pressure crushing roller with secondary pre-fastening of the roller skin according to claim 7, characterized in that, The clamping block (51) group is a ring structure, which is formed by circumferentially splicing multiple arc-shaped clamping block units (52).

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