Middle supporting structure of screw main shaft of homogenate extruder and double-screw extruder

Abstract

The utility model discloses a homogenate extruder screw spindle middle supporting structure and a double-screw extruder, and relates to the technical field of extruder forming devices, a tool structure of the homogenate extruder screw spindle middle supporting structure comprises a machine barrel, and a working cavity is formed in the machine barrel; the spline shafts are mounted in the working cavity side by side; the at least two supporting assemblies are mounted at the tail ends of the spline shafts in a one-to-one correspondence manner; the supporting assembly comprises a lining which is arranged on the spline shaft in a sleeving mode and synchronously rotates along with the spline shaft. The supporting overflowing seat is arranged on the lining in a sleeving manner; the bearing is arranged on the bushing in a sleeving manner, and the bearing is positioned in the supporting overflowing seat; the two limiting nuts are installed at the two ends of the lining correspondingly, and the limiting nuts are located in the supporting overflowing base; the utility model further discloses the tool jig frame used in the control method. The spline shaft supporting tool solves the technical problems that an existing spline shaft supporting tool is difficult to assemble, and the tail end of a shaft is prone to being scratched to generate metal powder.

Description

Technical Field

[0001] The utility model relates to the technical field of extrusion machine forming devices, in particular to an intermediate support structure of a screw main shaft of a homogenizing extruder and a twin-screw extruder. Background Art

[0002] The screw main shaft of a twin-screw extruder contains screw elements of various specifications and shapes such as conveying, shearing, kneading, and mixing. Due to the large length-diameter ratio, there are many screws. Since its mechanism is a cantilever beam type, the screw main shaft at the tail end has downward deformation, resulting in rubbing between the screw element and the inner wall of the cavity. Along with the long-term rubbing, corresponding metal fines will be generated, greatly reducing the quality of the battery slurry.

[0003] The existing technical solution only has an end support assembly, but this solution has two main problems. One is that the end support increases the end structure, but the deformation at the middle position of the main shaft (cantilever beam) has not changed, and the problem of end seal is also increased. The other is that the disassembly and assembly of this structure are relatively complex, increasing the difficulty of assembly. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an intermediate support structure of a screw main shaft of a homogenizing extruder and a twin-screw extruder, which solves the technical problems that the support tooling of the spline shaft in the prior art is difficult to assemble and the end of the shaft is prone to rubbing to generate metal powder.

[0005] The embodiment of the present application discloses an intermediate support structure of a screw main shaft of a homogenizing extruder, including

[0006] A barrel, inside which a working cavity is arranged;

[0007] At least two spline shafts, arranged side by side inside the working cavity;

[0008] At least two support assemblies, respectively installed at the ends of the spline shafts;

[0009] The support assembly includes:

[0010] A bushing, sleeved on the spline shaft and rotating synchronously with the spline shaft;

[0011] A support flow-through seat, sleeved on the bushing;

[0012] A bearing, sleeved on the bushing, and the bearing is located inside the support flow-through seat;

[0013] Two limit nuts, respectively installed at both ends of the bushing, and the limit nuts are located inside the support flow-through seat.

[0014] This application designs the support component, which is divided into four parts, with simple assembly. At the same time, the support overflow seat will not block the flow of the slurry, and can ensure the processing quality and efficiency.

[0015] On the basis of the above technical solution, the embodiment of this application can also be improved as follows:

[0016] Further, the outer wall of the bushing is stepped, and the bushing is axially divided into a first section and a second section, and the outer diameter of the first section is smaller than that of the second section; the bearing is installed on the first section, and the end face of the bearing contacts the end face of the second section. The beneficial effect of this step is that the stepped bushing is convenient for the assembly of the bearing.

[0017] Further, a plurality of protrusions are spaced along the circumferential direction of the outer wall of the support overflow seat, and an overflow groove is formed between adjacent protrusions. The beneficial effect of this step is that through the cooperation of the protrusions and the overflow grooves, the stable flow of the slurry can be realized.

[0018] Further, the overflow groove is a semi-circular groove. The beneficial effect of this step is that the overflow groove is easy to facilitate the flow of the slurry.

[0019] Further, the two support overflow seats are meshed with each other. The beneficial effect of this step is to ensure the static state of the two support overflow seats.

[0020] Further, the outer wall of the support overflow seat contacts the inner wall of the working cavity. The beneficial effect of this step is to prevent the rotation of the support overflow seat from affecting the slurry flow.

[0021] Further, the limit nut is divided into a first nut and a second nut. The outer wall of the first nut is provided with threads, and the outer wall of the first nut is threadedly connected to the inner wall of the support overflow seat;

[0022] The second nut has internal threads, and the second nut is threadedly connected to the outer wall of the bushing. The beneficial effect of this step is that by the mutual cooperation of the first nut and the second nut, the stable assembly of the support overflow seat can be realized.

[0023] Further, the inner wall of the support overflow seat is a stepped surface, and the first nut and the second nut cooperate with each other to complete the limitation of the bearing and the support overflow seat.

[0024] Further, the bearing is a ceramic bearing. The beneficial effect of this step is that the ceramic bearing can further avoid the generation of metal chips.

[0025] This application also discloses a twin-screw extruder, including the foregoing tooling structure.

[0026] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0027] 1. The present application designs the support component. By designing the outer ring of the support current-carrying seat, the metal foreign matter content of the battery slurry is greatly reduced.

[0028] 2. The present application can provide horizontal support for the spline shaft through the support component to prevent deformation.

[0029] 3. The structure of the support tooling disclosed in the present application is simple and has complete functions, which is convenient for disassembly and installation, improves the adaptability to the screw rod and the spline shaft, and greatly considers the operability on the principle of meeting the functionality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 It is a schematic structural diagram of an intermediate support structure of a screw main shaft of a homogenizing extruder according to a specific embodiment of the present invention;

[0032] Figure 2 For Figure 1 the schematic structural diagram of the support component in;

[0033] Figure 3 For Figure 1 the axonometric view of the support component in;

[0034] Figure 4 It is a schematic structural diagram of a twin-screw extruder according to a specific embodiment of the present invention;

[0035] The specific reference numerals are as follows:

[0036] 1 - barrel; 2 - spline shaft; 3 - support component; 4 - tooling structure;

[0037] 101 - working cavity;

[0038] 301 - bushing; 302 - support current-carrying seat; 303 - bearing; 304 - limit nut; 305 - first section; 306 - second section; 307 - protrusion; 308 - current-carrying groove; 309 - first nut; 310 - second nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] The embodiments of the technical solution of the present utility model will be described in detail below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present utility model, so they are only examples and cannot be used to limit the protection scope of the present utility model.

[0040] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art to which the present utility model belongs.

[0041] In this application, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0042] To better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings of the specification and the specific implementation manners.

[0043] Embodiment 1:

[0044] As Figures 1 - 3 shown, the embodiment of the present application discloses an intermediate support structure for the screw main shaft of a homogenizing extruder, which provides corresponding support force for components such as spline shafts, and avoids the excessive length of the spline shaft, resulting in the sagging of the screw assembly at its tail, so that during operation, the screw assembly will rub against the inner wall of the cavity, resulting in the generation of metal chips and affecting the quality of the battery slurry.

[0045] As Figure 1 shown, the specific structure of the present application includes:

[0046] A barrel 1, inside which a working cavity 101 is provided. The barrel 1 can be an existing barrel, and its longitudinal cross-sectional shape can be a rectangle or a polygon, as long as the working cavity is provided;

[0047] At least two spline shafts 2 are installed side by side inside the working cavity 101. During use, corresponding screw assemblies are installed on the spline shafts 2 to achieve functions such as stirring inside the working cavity 101, which will not be elaborated here;

[0048] At least two support assemblies 3 are respectively installed at the ends of the spline shafts 2. The support assemblies are used to support the ends of the spline shafts 2 to prevent them from sagging, thereby driving the screw assemblies thereon to sag, that is, to avoid the generation of metal powder;

[0049] Further description is given for the support assembly 3 in the present application. The support assembly 3 includes:

[0050] The bushing 301 is sleeved on the spline shaft 2 and rotates synchronously with the spline shaft 2. When in use, the spline shaft 2 can rotate under the drive of the power mechanism. At the same time, the inner wall of the bushing 301 is provided with a matching surface that matches the outer wall of the spline shaft 2. After assembly, it can rotate synchronously with the spline shaft 2;

[0051] The support flow seat 302 is sleeved on the bushing 301. The outer surface of the support flow seat 302 allows the slurry to pass through, so that the slurry can flow stably inside the working chamber 101, thereby realizing feeding;

[0052] The bearing 303 is sleeved on the bushing 301 and is located inside the supporting flow seat 302. The bearing 303 cooperates with the bushing 301 to ensure that the supporting flow seat 302 does not move when the bushing 301 rotates.

[0053] Two limiting nuts 304 are respectively installed at both ends of the bushing 301, and the limiting nuts 304 are located inside the supporting current seat 302; the limiting nuts 304 in the present application are used to achieve the limiting of the supporting current seat 302 to prevent it from axial movement.

[0054] The structure of the present application is further described, wherein the supporting flow seat 302 is stationary, and the bushing 301 rotates synchronously with the spline shaft 2, so that the supporting function can be achieved without affecting the flow of the slurry.

[0055] The movement of the bushing 301 and the supporting current seat 302 of the present application is realized through the bearing 303. In order to achieve the stability of the bearing 303 and avoid its movement, the outer wall of the bushing 301 is designed to be stepped; the bushing 301 is divided into a first section 305 and a second section 306 along its axial direction, and the outer diameter of the first section 305 is smaller than the outer diameter of the second section 306; the bearing 303 is installed on the first section 305, and the end face of the bearing 303 is in contact with the end face of the second section 306, that is, the bearing 303 is supported by the step shape.

[0056] Specifically, Figure 3 As shown, the outer wall of the supporting flow seat 302 is provided with a plurality of protrusions 307 spaced apart along its circumferential direction, and flow grooves 308 are formed between adjacent protrusions 307; the plurality of protrusions 307 cooperate with each other and contact the inner wall of the working chamber 101, so that the supporting flow seat 302 is stationary and will not affect the flow of the slurry; and the flow grooves 308 are utilized to facilitate the flow of the slurry.

[0057] Among them, the overflow chute 308 can be of various shapes, such as rectangular, polygonal, or triangular, and preferably a semi-circular chute.

[0058] Preferably, when it is a biaxial structure, there are also two support components 3 at this time, corresponding to the spline shaft 2 one by one. At this time, the support overflow seats 302 of the two support components 3 cooperate with each other; specifically, on the opposite sides of the two support overflow seats, the protrusions correspond to the grooves, forming a state similar to meshing, which can ensure the stability of the overall structure and prevent the support components from affecting the flow of the entire slurry.

[0059] Among them, the outer wall of the support overflow seat 302 contacts the inner wall of the working chamber 101. Combining the foregoing, although the bushing moves with it at this time, the support overflow seat 302 is in a stationary state, so the transportation of the slurry will not be affected.

[0060] Regarding the connection method between the limit nut 304 and the support overflow seat 302, the present application further explains that the limit nut 304 is divided into a first nut 309 and a second nut 310. The outer wall of the first nut 309 is provided with threads, and the outer wall of the first nut 309 is threadedly connected to the inner wall of the support overflow seat 302;

[0061] The second nut 310 has internal threads, and the second nut 310 is threadedly connected to the outer wall of the bushing 301; in the present application, the first nut is designed to be stepped, with the outer wall of the smaller diameter section designed with threads to complete the locking with the support overflow seat 302, and at the same time, the end of the larger diameter section abuts against the support overflow seat to complete the limit of its top; the second nut 310 is also stepped, with internal threads provided inside, threadedly connected to the outer wall of the bushing 301, and the end face of its larger diameter section abuts against the support overflow seat 302.

[0062] Among them, the inner wall of the support overflow seat 302 is a stepped surface, and the first nut 309 and the second nut 310 cooperate with each other to complete the limit of the bearing 303 and the support overflow seat 302; the support overflow seat 302 in the present application can also limit the bearing 303. Combining the cooperation of the first nut 309 and the second nut 310, the limit of the support overflow seat 302 and the bearing 303 can be completed.

[0063] In order to avoid the generation of metal chips, the present application designs the bearing 303 as a ceramic bearing, which can further avoid the generation of metal chips.

[0064] Further description will be made on the structure of the present application. In the present application, the spline shaft extends into the inside of the support assembly. Specifically, the support assembly 3 is installed at the end of the spline shaft. Since the spline shaft is relatively long, the threaded assembly at the tail will rub against the inner wall of the cavity. Long-term rubbing and friction will generate metal fines, which will finally be mixed in the battery slurry, resulting in excessive metal foreign matters and affecting the quality of the battery in the later stage. By providing a support assembly, the present application gives corresponding support forces to the spline shaft and the screw, etc., to avoid the sagging of the screw assembly caused by the cantilever beam structure. During operation, while the inner ring rotates with the spline shaft, the outer ring does not rotate relying on the supporting force of the inner wall of the cavity (ceramic bearing structure). The semi-circular grooves that support the outer circle of the current-carrying seat are provided to provide a flow channel for the battery slurry to pass through. The present application has been verified on the LB46×2 experimental machine, and it has well avoided the friction between the screw and the inner wall of the cavity. Considering from the source of metal fines, by avoiding friction, the generation of metal fines is avoided. This structure greatly improves the quality of the battery slurry in the homogenization section of the twin-screw extruder in the lithium battery industry and also enhances the equipment competitiveness of the twin-screw extruder in the homogenization section of the lithium battery industry.

[0065] As Figure 4 shown, the present application also discloses a twin-screw extruder, which includes the aforementioned tooling structure 4 and other components such as the remaining motor, etc., which will not be elaborated here.

[0066] In the description of the present utility model, a large number of specific details are illustrated. However, it can be understood that the embodiments of the present utility model can be practiced without these specific details. In some instances, well-known methods, structures, and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0067] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. An intermediate support structure for the screw main shaft of a homogenizing extruder, characterized in that, including a barrel, within which a working chamber is provided; at least two spline shafts, arranged side by side and installed inside the working chamber; at least two support components, each correspondingly installed at the end of the spline shaft; the support component includes: a bushing, sleeved on the spline shaft and rotating synchronously with the spline shaft; a support flow-through seat, sleeved on the bushing; a bearing, sleeved on the bushing, and the bearing is located inside the support flow-through seat; two limit nuts, respectively installed at both ends of the bushing, and the limit nuts are located inside the support flow-through seat.

2. The intermediate support structure of the screw main shaft of the homogenizing extruder according to claim 1, wherein The outer wall of the bushing is stepped, and the bushing is axially divided into a first section and a second section, the outer diameter of the first section is smaller than that of the second section; the bearing is installed on the first section, and the end face of the bearing contacts the end face of the second section.

3. The intermediate support structure of the screw spindle of the homogenizing extruder according to claim 1, characterized in that, The outer wall of the support flow-through seat is spaced with a plurality of protrusions along its circumferential direction, and an overflow groove is formed between adjacent protrusions.

4. The intermediate support structure of the screw main shaft of the homogenizing extruder according to claim 3, characterized in that, The overflow groove is a semi-circular groove.

5. The intermediate support structure of the screw main shaft of the homogenizing extruder according to claim 3, characterized in that, The two support flow-through seats are meshed with each other.

6. The intermediate support structure of the screw main shaft of the homogenizing extruder according to claim 1, characterized in that, The outer wall of the support flow-through seat contacts the inner wall of the working chamber.

7. The intermediate support structure of the screw spindle of the homogenizing extruder according to claim 1, characterized in that, The limit nut is divided into a first nut and a second nut, the outer wall of the first nut is provided with threads, and the outer wall of the first nut is threadedly connected with the inner wall of the support flow-through seat; The second nut has internal threads, and the second nut is threadedly connected with the outer wall of the bushing.

8. The intermediate support structure of the screw main shaft of the homogenizing extruder according to claim 7, characterized in that The inner wall of the support flow-through seat is a stepped surface, and the first nut and the second nut cooperate with each other to complete the limitation of the bearing and the support flow-through seat.

9. The intermediate support structure of the screw main shaft of the homogenizing extruder according to claim 1, characterized in that, The bearing is a ceramic bearing.

10. A twin-screw extruder, characterized in that, including the intermediate support structure of the homogenizing extrusion machine screw spindle according to any one of claims 1-9.

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