A key connection optimization device for a papermaking refiner dynamic disc

Abstract

The utility model discloses a papermaking pulping machine dynamic disc key connection optimization device relates to papermaking pulping machine technical field. The papermaking pulping machine dynamic disc key connection optimization device, including dynamic disc installation shaft, dynamic disc connection subassembly includes pulping machine dynamic disc, the surface of dynamic disc installation shaft is provided with first key groove, and the inboard of pulping machine dynamic disc is provided with second key groove, and the inboard sliding connection of first key groove has the key, and the key is slidingly connected with second key groove, the surface of dynamic disc installation shaft is provided with a plurality of spline grooves, and the inboard of pulping machine dynamic disc is provided with a plurality of spline teeth, and a plurality of spline teeth are slidingly connected with corresponding spline groove respectively, when pulping machine works, and the rotary power of dynamic disc installation shaft is transmitted to pulping machine dynamic disc through the double transmission structure of key, spline groove and spline tooth, makes it synchronous rotation with the axle, and the cooperation of fixed disc completes the shearing, defibering operation of paper pulp fiber, and the combination design of key and spline has improved transmission reliability greatly.

Description

Technical Field

[0001] This utility model relates to the field of paper mill technology, and in particular to an optimized device for the key connection of the motor disc in paper milling. Background Technology

[0002] In the pulping process of the papermaking industry, the refiner is the core equipment for refining and separating fibers, and its performance directly affects key quality indicators such as paper strength and uniformity. The paper refiner mainly uses the high-speed relative rotation between the moving and stationary discs to apply shearing, squeezing, and kneading actions to the pulp fibers, allowing the fibers to be fully loosened and modified, providing high-quality pulp for subsequent papermaking processes.

[0003] As the core working component of the refiner, the reliable connection between the moving disc and the connecting shaft is crucial to ensuring the stable operation of the refining process. Currently, the industry commonly uses a keyed connection to achieve circumferential fixation between the moving disc and the connecting shaft. This involves creating a keyway on the connecting shaft, setting a matching keyway at a corresponding position on the hub of the moving disc, and inserting a flat key to transmit torque. This connection structure is simple and has low manufacturing costs, and was widely used in early refiner designs.

[0004] However, with the increasing demands for pulping efficiency and pulp quality in the paper industry, the rotational speed and load of refiners are constantly increasing, and traditional flat key connections are gradually revealing many defects. On the one hand, there is a certain clearance between the flat key and the keyway. During the high-speed rotation of the moving disc, especially during startup, braking, or load fluctuations, circumferential relative displacement and impact vibration are easily generated between the moving disc and the connecting shaft. Long-term impact can lead to fatigue wear on the edge of the keyway, and even plastic deformation, further widening the clearance and affecting the use of the refiner. Therefore, this utility model proposes a novel solution. Utility Model Content

[0005] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide an optimized keyway connection device for a paper mill refining machine. This device can solve the problem that during the high-speed rotation of the refining disc, especially during startup, braking, or load fluctuations, circumferential relative displacement and impact vibration easily occur between the refining disc and the connecting shaft. Long-term impact can lead to fatigue wear on the keyway edge, and even plastic deformation, further widening the fit clearance and affecting the use of the refining machine.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an optimized device for key connection of a moving disc in papermaking pulping, comprising a moving disc mounting shaft; A moving disc connection assembly is disposed on a moving disc mounting shaft. The moving disc connection assembly includes a grinding moving disc, which slides onto the surface of the moving disc mounting shaft. A first keyway is provided on the surface of the rotating disc mounting shaft, and a second keyway is provided on the inner side of the rotating disc of the grinding mill. A flat key is slidably connected to the inner side of the first keyway, and the flat key is slidably connected to the second keyway. The surface of the rotating disc mounting shaft is provided with multiple spline grooves, and the inner side of the rotating disc of the grinding wheel is provided with multiple spline teeth, which are slidably connected to the corresponding spline grooves.

[0007] Preferably, a moving disk connecting disk is sleeved on the surface of the moving disk mounting shaft, and multiple spline teeth are also fixedly connected to the inner side of the moving disk connecting disk; The spline teeth on the inner side of the moving plate connecting plate are slidably connected to the corresponding spline grooves.

[0008] Preferably, the moving disc connecting disc is fixed to the grinding moving disc by bolts.

[0009] Preferably, a connecting column is fixedly connected to the front side of the moving disk mounting shaft, and a limiting plate is provided on the left side of the moving disk mounting shaft, with a sliding groove opened on the inner side of the limiting plate; The groove is slidably connected to the connecting column.

[0010] Preferably, the limiting plate is fixed to the moving plate mounting shaft by bolts.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. The optimized key connection device for the moving disc of the paper mill, when the mill is working, the rotational power of the moving disc mounting shaft is transmitted to the moving disc of the mill through a dual transmission structure of flat key, spline groove and spline teeth, so that it rotates synchronously with the shaft and cooperates with the fixed disc to complete the shearing and delamination of pulp fibers; the combination design of flat key and spline greatly improves the transmission reliability. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the optimized connection structure of the motor disc for papermaking pulping according to the present invention; Figure 2 This is a schematic diagram of the grinding disc of this utility model; Figure 3 This is a schematic diagram of the first keyway of this utility model; Figure 4 This is a schematic diagram of the moving disc connecting disc of this utility model; Figure 5 This is a schematic diagram of the limiting plate of this utility model.

[0013] Reference numerals in the attached diagram: 1. Moving disc mounting shaft; 2. Polishing moving disc; 3. Flat key; 4. First keyway; 5. Second keyway; 6. Moving disc connecting disc; 7. Connecting column; 8. Limiting disc; 9. Slide groove; 10. Spline groove; 11. Spline tooth. Detailed Implementation

[0014] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0015] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0016] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0017] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0018] Please see Figure 1-5 This utility model provides a technical solution: a papermaking pulping motor disc key connection optimization device, including a motor disc mounting shaft 1 and a motor disc connecting assembly. The motor disc connecting assembly is disposed on the motor disc mounting shaft 1 and includes a pulping motor disc 2. The pulping motor disc 2 is slidably sleeved on the surface of the motor disc mounting shaft 1. A first keyway 4 is opened on the surface of the motor disc mounting shaft 1, and a second keyway 5 is opened on the inner side of the pulping motor disc 2. A flat key 3 is slidably connected to the inner side of the first keyway 4 and is slidably connected to the second keyway 5. A plurality of spline grooves 10 are opened on the surface of the motor disc mounting shaft 1, and a plurality of spline teeth 11 are opened on the inner side of the pulping motor disc 2. The plurality of spline teeth 11 are slidably connected to the corresponding spline grooves 10.

[0019] The surface of the moving disk mounting shaft 1 is fitted with a moving disk connecting disk 6. The inner side of the moving disk connecting disk 6 is also fixedly connected with multiple spline teeth 11. The spline teeth 11 on the inner side of the moving disk connecting disk 6 are slidably connected to the corresponding spline grooves 10.

[0020] The moving disc connecting disc 6 is fixed to the grinding moving disc 2 by bolts.

[0021] A connecting column 7 is fixedly connected to the front side of the moving plate mounting shaft 1. A limit plate 8 is provided on the left side of the moving plate mounting shaft 1. A sliding groove 9 is provided on the inner side of the limit plate 8. The sliding groove 9 is slidably connected to the connecting column 7.

[0022] The limit plate 8 is fixed to the moving plate mounting shaft 1 by bolts.

[0023] Furthermore, the moving disc mounting shaft 1, as the core load-bearing and transmission component, provides the mounting foundation for the entire connection structure; the grinding disc 2 is mounted on the surface of the moving disc mounting shaft 1 by a sliding sleeve, and the second keyway 5 on its inner side is precisely aligned with the first keyway 4 on the surface of the moving disc mounting shaft 1. The flat key 3 is embedded in both sets of keyways at the same time, forming a primary circumferential limit; the sliding fit between the flat key 3 and the keyway ensures that the grinding disc 2 rotates synchronously with the moving disc mounting shaft 1 to transmit torque, and also provides convenience for the assembly and disassembly of both.

[0024] Multiple spline grooves 10 on the surface of the moving disc mounting shaft 1 and multiple spline teeth 11 on the inner side of the grinding moving disc 2 form multiple sets of sliding fits, constituting a secondary circumferential constraint; the inter-tooth meshing of the spline structure greatly increases the transmission contact area, disperses and transmits torque, avoids the keyway wear problem caused by stress concentration in the traditional single flat key connection, and significantly improves the transmission stability under high-speed rotation and high-load conditions.

[0025] The moving plate connecting plate 6 is sleeved on the surface of the moving plate mounting shaft 1. The spline teeth 11 on its inner side also cooperate with the spline groove 10 of the moving plate mounting shaft 1. After being fixed to the grinding moving plate 2 by bolts, a double spline transmission structure is formed. This design further enhances the circumferential positioning accuracy. At the same time, the rigid support of the moving plate connecting plate 6 reduces the radial runout of the grinding moving plate 2 during rotation, ensuring the uniformity of the grinding gap.

[0026] The connecting post 7 on the front side of the moving plate mounting shaft 1 slides into the groove 9 on the inner side of the limiting plate 8. After the limiting plate 8 is fixed to the moving plate mounting shaft 1 by bolts, it fits tightly against the end face of the grinding moving plate 2 to form an axial limit. This structure can effectively prevent the grinding moving plate 2 from moving under axial impact force, avoid fluctuations in grinding effect caused by axial displacement, and at the same time, the cooperation between the groove 9 and the connecting post 7 ensures the alignment accuracy of the limiting plate 8 during installation and simplifies the assembly process.

[0027] Furthermore, when the refiner is working, the rotational power of the moving disc mounting shaft 1 is transmitted to the refiner moving disc 2 through the dual transmission structure of the flat key 3, spline groove 10 and spline teeth 11, so that it rotates synchronously with the shaft and cooperates with the fixed disc to complete the shearing and loosening of pulp fibers; the combination design of the flat key and spline greatly improves the transmission reliability.

[0028] The moving disc connecting disc 6 is fixed to the grinding moving disc 2 by bolts. Its inner spline teeth 11 cooperate with the spline groove 10 of the moving disc mounting shaft 1 to form a double spline transmission, which further improves the circumferential positioning accuracy. The axial fixation of the limit disc 8 ensures the stability of operation. The overall structure effectively solves the problems of fast wear and low transmission efficiency in traditional key connections, and extends the service life of the equipment.

[0029] Structural Description: Moving plate mounting shaft 1: As the core load-bearing and transmission component, it provides the mounting base for the entire connection structure. The first keyway 4 and spline groove 10 on the surface are used to cooperate with the flat key 3 and spline teeth 11 to realize torque transmission. The connecting column 7 on the front side provides the installation positioning reference for the limiting plate 8. The pulping disc 2 is slidably sleeved on the surface of the moving disc mounting shaft 1 and is the core working component of the pulping operation. It rotates synchronously with the moving disc mounting shaft 1 through the inner second keyway 5 cooperating with the flat key 3 and the spline tooth 11 cooperating with the spline groove 10. It cooperates with the fixed disc to complete the shearing and disintegration of pulp fibers. Flat key 3: It is simultaneously slidably connected in the first keyway 4 and the second keyway 5 to form a primary circumferential limit, transmit basic torque, ensure that the grinding disc 2 rotates synchronously with the disc mounting shaft 1, and facilitate the assembly and disassembly of both. First keyway 4: It is opened on the surface of the moving plate mounting shaft 1 to provide installation space for the flat key 3. It is an important part of the flat key connection and works with the flat key 3 to achieve initial circumferential positioning and torque transmission. Second keyway 5: It is opened on the inner side of the grinding disc 2 and corresponds to the first keyway 4. It is used to accommodate the flat key 3 so that the flat key 3 can drive the grinding disc 2 to rotate with the disc mounting shaft 1. Moving disk connecting disk 6: It is sleeved on the surface of the moving disk mounting shaft 1. The inner spline teeth 11 and spline groove 10 are engaged. After being fixed to the grinding moving disk 2 by bolts, it forms a double spline transmission, which enhances the circumferential positioning accuracy and reduces the radial runout of the grinding moving disk 2. Connecting column 7: Fixed on the front side of the moving plate mounting shaft 1, it slides in conjunction with the sliding groove 9 of the limiting plate 8 to provide installation positioning for the limiting plate 8 and ensure the alignment accuracy of the limiting plate 8; Limiting disc 8: It cooperates with connecting column 7 through sliding groove 9, and is fixed to moving disc mounting shaft 1 by bolts. It fits tightly against the end face of grinding motor disc 2 to form axial limit and prevent grinding motor disc 2 from moving axially. Slide groove 9: It is formed inside the limiting plate 8 and slides with the connecting column 7 to facilitate the positioning of the limiting plate 8 during installation and simplify the assembly process; Spline groove 10: It is formed on the surface of the moving disk mounting shaft 1 and cooperates with the spline teeth 11 to form a spline connection, which constitutes a secondary circumferential constraint, increases the transmission contact area, disperses stress, and improves transmission stability; Spline teeth 11: They are respectively set inside the grinding disc 2 and the connecting disc 6, and are slidably connected with the corresponding spline grooves 10. Through multi-tooth meshing, they transmit torque, thereby enhancing circumferential positioning accuracy and transmission reliability.

[0030] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A paper mill refining motor disc key connection optimization device, characterized in that: Including the moving plate mounting shaft (1); The moving disc connection assembly is disposed on the moving disc mounting shaft (1). The moving disc connection assembly includes a grinding moving disc (2), which slides onto the surface of the moving disc mounting shaft (1). The surface of the moving disc mounting shaft (1) is provided with a first keyway (4), and the inner side of the grinding disc (2) is provided with a second keyway (5). A flat key (3) is slidably connected to the inner side of the first keyway (4), and the flat key (3) is slidably connected to the second keyway (5). The surface of the moving disk mounting shaft (1) is provided with multiple spline grooves (10), and the inner side of the grinding moving disk (2) is provided with multiple spline teeth (11), and the multiple spline teeth (11) are slidably connected to the corresponding spline grooves (10).

2. The paper mill refining motor disc key connection optimization device according to claim 1, characterized in that: The surface of the moving disk mounting shaft (1) is fitted with a moving disk connecting disk (6), and the inner side of the moving disk connecting disk (6) is also fixedly connected with multiple spline teeth (11). The spline teeth (11) on the inner side of the moving plate connecting plate (6) are slidably connected to the corresponding spline grooves (10).

3. The paper milling motor disc key connection optimization device according to claim 2, characterized in that: The moving disc connecting disc (6) is fixed to the grinding moving disc (2) by bolts.

4. The paper mill refining motor disc key connection optimization device according to claim 1, characterized in that: A connecting column (7) is fixedly connected to the front side of the moving disk mounting shaft (1), and a limiting disk (8) is provided on the left side of the moving disk mounting shaft (1). A sliding groove (9) is provided on the inner side of the limiting disk (8). The slide groove (9) is slidably connected to the connecting column (7).

5. The paper milling motor disc key connection optimization device according to claim 4, characterized in that: The limiting plate (8) is fixed to the moving plate mounting shaft (1) by bolts.

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