A crushing roller set and a roll mill

Abstract

The utility model discloses a broken roller set, include: tooth roll, the center of tooth roll is provided with through -hole along its axis, be provided with at least one keyway in the through -hole, the surface of pivot is provided with the key block corresponding with the keyway number, position, the both sides of key block are provided with gasket, when the key block is inserted to the keyway, and there is the gap between the top surface of key block and keyway, and the gasket is contacted with the keyway side wall, be provided with the shaft sleeve between tooth roll with pivot, the gasket and shaft sleeve are all soft material quality. The utility model discloses a pair of roll machine. Through the keyway in the tooth roll center through -hole and the key block on the pivot corresponding special design, under the condition of ensuring that the pivot can provide enough driving force to tooth roll, the surface of tooth roll and key block, pivot all do not directly contact, avoided the condition of tooth roll burst because of the different thermal expansion rate of pivot and tooth roll.

Description

Technical Field

[0001] This utility model relates to a crushing roller assembly and a double roller mill, belonging to the field of automated crushing technology. Background Technology

[0002] In the field of crushing technology, double roller mills are common crushing equipment. They use rotation to drive hard toothed rollers to rotate relative to each other, and achieve rapid crushing of materials through mutual extrusion. In order to improve the hardness of the crushing roller assembly, ceramic toothed rollers are usually fitted on the rotating shaft. The hardness of ceramic material is used to meet the crushing requirements of some special materials.

[0003] However, when the material to be crushed is a high-temperature material, the high temperature of the material will be transferred to the toothed roller and the shaft. Since the toothed roller and the shaft are made of different materials, their coefficients of thermal expansion are also different. The metal shaft has a higher coefficient of thermal expansion than the ceramic toothed roller. If the shaft and toothed roller cannot be cooled down quickly, the ceramic toothed roller is very easy to burst due to the thermal expansion of the shaft because the metal shaft and the ceramic toothed roller are tightly attached.

[0004] The existing method usually solves this problem by setting up a circulating water channel inside the shaft for cooling, but this cooling method has the following drawbacks: First, after opening a cooling water channel inside the shaft, the strength of the entire shaft will be greatly affected. When crushing larger pieces of materials with high hardness, it is easy to encounter situations where the materials cannot be crushed, or even the shaft may break. Secondly, due to the limited size of the shaft, it is impossible to open a large cooling water channel inside the shaft, so the cooling effect is not good. For long-term operation or materials to be crushed at high temperatures, the ceramic toothed roller is still prone to cracking due to the thermal expansion of the shaft. Summary of the Invention

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a crushing roller assembly and a double roller machine. By making corresponding special designs for the keyway in the central through hole of the toothed roller and the key block on the rotating shaft, while ensuring that the rotating shaft can provide sufficient driving force to the toothed roller, the surfaces of the toothed roller, the key block, and the rotating shaft do not directly contact each other, thus avoiding the situation where the toothed roller bursts due to the difference in thermal expansion rates between the rotating shaft and the toothed roller.

[0006] To achieve the above objectives, this utility model employs the following technical solution: A crushing roller assembly includes: a toothed roller, the center of which has a through hole along its axis, and at least one keyway is provided in the through hole; a rotating shaft, on which key blocks are provided corresponding to the number and position of the keyways, and gaskets are provided on both sides of the key blocks; a bushing is provided between the toothed roller and the rotating shaft; the gaskets and the bushing are both made of soft material, and when the key blocks are inserted into the keyways, there is a gap between the top surface of the key blocks and the keyways, and the gaskets are in contact with the sidewalls of the keyways.

[0007] The aforementioned crushing roller assembly is characterized in that the through hole includes a first through hole located at both ends of the toothed roller and a second through hole located between the two first through holes, and the keyway is provided at the edge of the second through hole; a bushing is provided between the first through hole of the toothed roller and the rotating shaft.

[0008] The aforementioned crushing roller assembly is characterized in that the surface of the rotating shaft is provided with grooves corresponding to the number and position of the keyways, and the key blocks are disposed in the grooves.

[0009] The aforementioned crushing roller assembly is characterized in that the key block has a T-shaped cross-section, one end of the gasket is inserted into the groove, the other end is pressed by the folded portion of the key block, and the outer edge of the gasket protrudes from the folded portion of the key block.

[0010] The aforementioned crushing roller assembly is characterized in that stepped surfaces for supporting the pads are provided on both sides of the groove.

[0011] The aforementioned crushing roller assembly is characterized in that the bottom surface of the groove is provided with a plurality of fixing holes, the key block is provided with connecting holes corresponding to the position and number of the fixing holes, and the key block is connected to the rotating shaft through a connector, connecting holes, and fixing holes.

[0012] The aforementioned crushing roller assembly is characterized in that four keyways are equally spaced along the circumference of the edge of the second through hole.

[0013] The aforementioned crushing roller assembly is characterized in that the gasket and bushing are made of Teflon or polyetheretherketone, and the toothed roller is made of ceramic material.

[0014] The aforementioned crushing roller assembly is characterized in that the bushing is a C-shaped structure with a notch, and a metal washer is also provided between the bushing and the rotating shaft.

[0015] A double-roll mill includes the aforementioned crushing roll assembly.

[0016] Compared with the prior art, the airflow dryer provided by this utility model provides a crushing roller assembly and a double roller machine. Through the special design of the keyway in the central through hole of the toothed roller and the key block on the rotating shaft, the toothed roller, the key block and the rotating shaft are not in direct contact with each other while ensuring that the rotating shaft can provide sufficient driving force to the toothed roller. This avoids the situation where the toothed roller bursts due to the difference in thermal expansion coefficients between the rotating shaft and the toothed roller. Attached Figure Description

[0017] Figure 1 This is a front view of a crushing roller assembly according to this utility model; Figure 2 This is a front view of a crushing roller assembly according to this utility model; Figure 3 yes Figure 2 AA section view; Figure 4 yes Figure 2 BB section view; Figure 5 yes Figure 2 CC section view; Figure 6 This is a front view of the toothed roller of a crushing roller assembly according to this utility model; Figure 7 This is a front view of the toothed roller of a crushing roller assembly according to this utility model; Figure 8 yes Figure 7 DD section view; Figure 9 yes Figure 7 EE section view; Figure 10 This is a side view of the toothed roller of a crushing roller assembly according to this utility model; Figure 11 This is a front view of the rotating shaft of a crushing roller assembly according to this utility model; Figure 12 yes Figure 11 Enlarged diagram of F in the middle; Figure 13 This is a front view of the key block of a crushing roller assembly according to this utility model. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] like Figures 1-13 As shown, the present invention provides a crushing roller assembly, comprising: a toothed roller 20, wherein a through hole is provided at the center of the toothed roller 20 along its axis, and at least one keyway 221 is provided in the through hole; a rotating shaft 10, wherein key blocks 40 are provided on the rotating shaft 10 corresponding to the number and position of the keyways 221, and gaskets 60 are provided on both sides of the key blocks 40. When the key blocks 40 are inserted into the keyways 221, there is a gap between the top surface of the key blocks 40 and the keyways 221, and the gaskets 60 are in contact with the sidewalls of the keyways 221; a bushing 30 is provided between the toothed roller 20 and the rotating shaft 10; both the gaskets 60 and the bushing 30 are made of soft material.

[0022] Specifically, the through hole includes a first through hole 21 located at both ends of the toothed roller 20 and a second through hole 22 located between the two first through holes 21. The keyway 221 is provided at the edge of the second through hole 22. The diameter of the second through hole 22 is smaller than the diameter of the first through hole 21. A bushing 30 is provided between the first through hole 21 of the toothed roller 20 and the rotating shaft 10.

[0023] By providing shims 60 on both sides of the key block 40, after the key block 40 is inserted into the keyway 221, the two sides will not directly contact the side wall of the keyway 221, but will be isolated by the shims 60. The shims 60 will contact the side wall of the keyway 221, and there will also be a gap between the top of the key block 40 and the bottom of the keyway 221. In addition, a bushing 30 is provided between the toothed roller 20 and the rotating shaft 10 at other positions except for the second through hole 22. That is, there is no direct contact between the rotating shaft 10 and the toothed roller 20, and there is also no direct contact between the key block 40 and the toothed roller 20. The rotating shaft 10 is inserted into the keyway 221 through the key block 40 to drive the toothed roller 20. The number of key blocks 40 and keyways 211 can be set according to the actual situation. In this embodiment, four keyways 221 are equally spaced along the circumference of the second through hole 22. At the same time, four key blocks are also set on the rotating shaft 10, which are respectively inserted into the corresponding keyways 221, so as to meet the transmission requirements.

[0024] The soft material gasket 60 and bushing 30 not only completely fill the gap between the rotating shaft 10 and the toothed roller 20, ensuring overall transmission strength, but also absorb the expansion of the metal rotating shaft 10 due to thermal expansion during the crushing of high-temperature materials. This prevents the ceramic toothed roller 20 from being crushed and bursting. After crushing, as the bearing 10 gradually returns to normal temperature, the compressed gasket 60 and bushing 30 also return to their original position, ensuring that the gap between the rotating shaft 10 and the toothed roller 20 is always completely filled, without affecting transmission efficiency.

[0025] The gasket 60 and bushing 30 used in this embodiment are made of Teflon or polyetheretherketone, or other soft materials that can meet the above requirements.

[0026] In this embodiment, two first through holes 21 are provided in the toothed roller 20, and a second through hole 22 is provided between the two first through holes 21. In order to facilitate assembly, the diameter of the second through hole 22 is smaller than the diameter of the first through hole 21, so as to ensure that the key block 40 can be smoothly inserted from one end of the toothed roller 20 during assembly. In order to ensure the overall strength after assembly, the depth of the keyway 221 should not exceed the outer wall of the first through hole 21.

[0027] In the specific implementation process, the first through hole 21 and the second through hole 22 can be staggered along the central axis of the toothed roller as needed. That is, the transmission strength will be better by using a segmented keyway and key block. However, the assembly difficulty will also increase accordingly.

[0028] In this embodiment, the surface of the rotating shaft 10 is provided with grooves 11 corresponding to the number and position of the keyways 221, and the key block 40 is disposed in the grooves 11. The detachable structure of the key block 40 and the rotating shaft 10 facilitates the processing of both the rotating shaft 10 and the key block 40, makes replacement of the key block 40 more convenient, and also facilitates the disassembly and assembly of the corresponding gasket 60. Alternatively, the key block can be integrally molded onto the rotating shaft 10, and the gasket can be fixed to the surface of the key block 40 using a connector. However, with this structure, especially when the gasket thickness is small, the ceramic toothed roller is easily damaged due to the thermal expansion of the connector.

[0029] Therefore, in this utility model, the key block 40 has a T-shaped cross-section. One end of the gasket 60 is inserted into the groove 11, and the other end is held by the folded portion 42 of the key block 40. The outer edge of the gasket 60 protrudes from the folded portion 42 of the key block 40. The bottom surface of the groove 11 is provided with multiple fixing holes 112, and the key block 40 is provided with connecting holes 41 corresponding to the position and number of the fixing holes 112. The key block 40 is connected to the rotating shaft 10 through the connector 50, the connecting holes 41, and the fixing holes 112.

[0030] During the assembly of the key block 40 and the gasket 60, firstly, the two gaskets 60 are inserted into the groove 11. Then, one end of the key block 40 is inserted into the groove 11 between the two gaskets 60 and locked in place by the connector 50. At this time, the two folded portions 42 of the key block 40 press against the corresponding two gaskets 60, completing the quick fixing of the gaskets. The outer edges of the two gaskets 60 protrude from the folded portions 42 of the key block 40. When the rotating shaft 10 is inserted into the toothed roller 20, the gasket 60 contacts the side wall of the keyway 221, and there is also a gap between the top of the key block 40 and the bottom of the keyway 221.

[0031] To facilitate the fixing of the gasket 60, stepped surfaces 111 for supporting the gasket 60 are provided on both sides of the groove 11. The lower end of the gasket 60 is located at the stepped surface 111, and the lower end of the key block 40 is inserted into the part between the two stepped surfaces, making the entire structure more stable and improving the overall transmission strength.

[0032] In order to better utilize the bushing 30 to absorb the thermal expansion of the rotating shaft 10, the bushing 30 is a C-shaped structure with a notch 31. It can not only use the elasticity of the bushing 30 itself to absorb the thermal expansion, but also use the notch 31 to extend itself to absorb the thermal expansion of the bushing 30.

[0033] To enhance the connection strength between the rotating shaft 10 and the toothed roller, a metal washer 70 can be provided between the bushing 30 and the rotating shaft 10 as needed. To ensure the stability of the entire crushing roller, bearing sleeves can be provided on the rotating shaft 10 on both sides of the toothed roller 20.

[0034] The crushing roller assembly provided by this utility model includes the following steps during assembly: (1) Insert the gaskets 60 into both sides of the groove 11 and insert the key block 40 into the groove 11 between the two gaskets 60, and lock the connection by the connector 50; (2) Metal washers 70 and bushings 30 are fitted into the first through holes 21 at both ends of the toothed roller 20; (3) Insert one end of the rotating shaft 10 into one end of the toothed roller 20, so that the key block 40 fixed in the groove 11 of the rotating shaft 10 is fully inserted into the keyway 221 of the second through hole, so that the two ends of the rotating shaft 10 are tightly fitted with the corresponding metal washer 70, the washer 60 is fitted with the side wall of the keyway 221, and there is a gap between the top of the key block 40 and the keyway 221.

[0035] It should be noted that in this embodiment, the diameter of the second through hole 22 is smaller than that of the first through hole 21. To ensure the shaft 10 can be smoothly inserted into the through hole of the toothed roller 20, the edge of the key block 40 must not exceed the edge of the first through hole 21 during insertion. Therefore, the depth of the keyway 221 should not exceed the edge of the first through hole 21. If the depth of the keyway 221 exceeds the edge of the first through hole 21, it not only places higher demands on the machining of the toothed roller, but the excess portion will not only fail to contribute to the transmission between the shaft and the toothed roller, but will also reduce the strength of the toothed roller. The optimal depth of the keyway 221 is flush with the edge of the first through hole 21, which not only facilitates machining but also ensures transmission strength.

[0036] This utility model also provides a double roller mill, which includes the crushing roller group described in this embodiment.

[0037] In summary, the crushing roller assembly and double roller mill provided by this utility model, through the special design of the keyway in the central through hole of the toothed roller and the key block on the rotating shaft, ensures that the rotating shaft can provide sufficient driving force to the toothed roller, while the surfaces of the toothed roller, the key block, and the rotating shaft do not directly contact each other, thus avoiding the situation where the toothed roller bursts due to the difference in thermal expansion rates between the rotating shaft and the toothed roller.

[0038] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A crushing roller assembly, characterized in that, include: A toothed roller (20) has a through hole along its axis at its center, and at least one keyway (221) is provided in the through hole. A rotating shaft (10) is provided with key blocks (40) corresponding to the number and position of the keyways (221). Gaskets (60) are provided on both sides of the key block (40). A bushing (30) is provided between the toothed roller (20) and the rotating shaft (10), and both the gasket (60) and the bushing (30) are made of soft material; When the key block (40) is inserted into the keyway (221), there is a gap between the top surface of the key block (40) and the keyway (221), and the gasket (60) contacts the side wall of the keyway (221).

2. The crushing roller assembly according to claim 1, characterized in that, The through hole includes a first through hole (21) located at both ends of the toothed roller (20) and a second through hole (22) located between the two first through holes (21), and the keyway (221) is provided at the edge of the second through hole (22); A bushing (30) is provided between the first through hole (21) of the toothed roller (20) and the rotating shaft (10).

3. A crushing roller assembly according to claim 2, characterized in that, The surface of the rotating shaft (10) is provided with grooves (11) corresponding to the number and position of the keyways (221), and the key block (40) is disposed in the grooves (11).

4. A crushing roller assembly according to claim 3, characterized in that, The key block (40) has a T-shaped cross-section. One end of the gasket (60) is inserted into the groove (11), and the other end is pressed by the folded part (42) of the key block (40). The outer edge of the gasket (60) protrudes from the folded part (42) of the key block (40).

5. A crushing roller assembly according to claim 4, characterized in that, The groove (11) has stepped surfaces (111) on both sides for supporting the pad (60).

6. A crushing roller assembly according to claim 3, characterized in that, The bottom surface of the groove (11) is provided with a plurality of fixing holes (112), and the key block (40) is provided with connecting holes (41) corresponding to the position and number of the fixing holes (112). The key block (40) is connected to the rotating shaft (10) through the connector (50), connecting holes (41) and fixing holes (112).

7. A crushing roller assembly according to claim 2, characterized in that, Four keyways (221) are provided at equal intervals along the perimeter of the second through hole (22).

8. A crushing roller assembly according to claim 1, characterized in that, The gasket (60) and bushing (30) are made of Teflon or polyetheretherketone, and the toothed roller (20) is made of ceramic.

9. A crushing roller assembly according to claim 8, characterized in that, The bushing (30) is a C-shaped structure with a notch (31), and a metal washer (70) is provided between the bushing (30) and the rotating shaft (10).

10. A double-roll mill, characterized in that: Includes the crushing roller assembly as described in any one of claims 1-9.

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