A guide wheel structure for a solar cell slicer

Abstract

The present invention discloses a guide wheel structure for a solar cell slicer, comprising a guide wheel body, the guide wheel body comprising a ceramic tube, a metal tube or a porous ceramic shaft is sleeved inside the ceramic tube; flanges are arranged at both ends of the guide wheel body, a PU adhesive layer is arranged on the outer end surface of the ceramic tube, and a wire groove for routing a cutting wire is arranged on the PU adhesive layer. The guide wheel of the above structure has strong rigidity, good wear resistance and corrosion resistance, and can meet the requirements of high-speed operation and cutting.

Description

Technical Field

[0001] The invention relates to the field of solar photovoltaics, and in particular to a guide wheel structure for a solar cell slicer. Background Art

[0002] With the expansion and rapid development of the photovoltaic industry, the production of solar cells in China's photovoltaic industry has reached 68GW in 2017. The entire photovoltaic industry has higher and higher requirements for equipment capacity upgrades. Multi-wire cutting process is a commonly used slicing process in the industry. At present, the rigid wire speed of slicing equipment is generally around 20m / s. As the pressure on increasing production capacity in the cell slicing process is increasing, the guide wheel, as a winding component on the slicing equipment, provides rigid wire tension, running speed and precise wire arrangement position, which plays a very important role in improving slicing efficiency.

[0003] like Figure 1 As shown, the existing guide wheel generally adopts a steel guide wheel body 1′, and the guide wheel body 1′ is composed of a central rotating shaft 1-1′, a bearing 1-3′ fixedly mounted on the rotating shaft 1-1′, and a cylindrical carrier 1-2′ fixedly mounted on the bearing 1-3′, so that the cylindrical carrier 1-2′ can rotate along the central axis of the rotating shaft 1-1′. Flanges 3′ are fixedly arranged at both ends of the rotating shaft, a PU adhesive layer 2′ is arranged on the periphery of the cylindrical carrier 1-2′, and a wire groove for routing the cutting wire is arranged on the PU adhesive layer 2′. The existing guide wheel has a large single unit weight and a large moment of inertia, and is not suitable for the low inertia requirements required for high-speed cutting. At the same time, the existing guide wheel is not rigid enough to meet the requirements of high-speed and high-precision cutting of slices, and its own material is also easily corroded, reducing its service life. Summary of the invention

[0004] In order to overcome the above disadvantages, the object of the present invention is to provide a guide wheel structure for a solar cell slicer with strong rigidity and small moment of inertia, so as to meet the requirements for high-speed and high-precision cutting.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is: a guide wheel structure for a solar cell slicer, comprising a guide wheel body, flanges are arranged at both ends of the guide wheel body, the guide wheel body comprises a ceramic tube and a metal tube or a porous ceramic shaft inserted therein, the ceramic tube and the metal tube or the porous ceramic shaft are relatively stationary; a PU adhesive layer is arranged on the outer end surface of the ceramic tube, and a wire groove for routing the cutting wire is arranged on the PU adhesive layer; other materials can be used as wire groove carriers on the outer side of the ceramic tube to realize the routing of the cutting wire, and the above-mentioned metal tube can be made of steel.

[0006] Furthermore, the metal tube is a metal tube with a hollow structure and a certain thickness; the porous ceramic shaft is a ceramic shaft made of ceramic material with a hollow or porous structure inside. It is used to reduce the weight of the guide wheel body, reduce the moment of inertia, and help reduce the impact on the transmission mechanism.

[0007] Furthermore, the ceramic tube is mounted on the metal tube or the porous ceramic shaft by gluing, tight fitting, or key connection, so that the ceramic tube will not be displaced relative to the metal tube or the porous ceramic shaft.

[0008] Preferably, the flanges are installed on both ends of the guide wheel body by welding, shrink fitting or cold fitting.

[0009] Preferably, the inner side of the ceramic tube is provided with thorn strips distributed in a straight line, and the outer end surface of the guide wheel body is provided with a limit groove matched with the thorn strips along its axial direction. The ceramic tube is positioned on the guide wheel body by plugging, and the two ends of the ceramic tube are pressed against the flange, so as to realize the overall synchronous operation.

[0010] Preferably, an annular groove matching the diameter of the ceramic tube is provided on the inner end surface of the flange, a toothed portion is provided in the annular groove, and a limiting slot matching the toothed portion is provided on the side wall of the ceramic tube. The ceramic tube is limited by the flange to prevent it from rotating relative to the guide wheel body.

[0011] When using a metal tube, the present invention combines ceramic materials with metal materials to enhance the overall strength and rigidity of the guide wheel, and adapts to high torque and high speed operation; the operating state is more stable and reliable, with higher precision and smaller vibration, and is adapted to ultra-fine diamond wire cutting, improving cutting accuracy and cutting efficiency, and extending the cutting length; the ceramic material is corrosion-resistant and has a longer service life; the inner layer of the inlaid metal tube has good toughness and can withstand a certain impact, making the equipment run safer; the hollow structure is adopted, the guide wheel is lighter, the moment of inertia is small, and the impact on the transmission mechanism is reduced.

[0012] When using a porous ceramic shaft, the present invention adopts two ceramic structures, with a porous ceramic shaft inside and a ceramic tube nested on the outside, and metal flanges at both ends of the guide wheel, which enhances the overall strength and rigidity of the guide wheel and adapts to high torque and high speed operation; the operating state is more stable and reliable, with higher precision and smaller jump, and is adapted to ultra-fine diamond wire cutting, improving cutting accuracy and cutting efficiency, and longer cutting length; the ceramic material is corrosion-resistant and has a longer service life; the porous ceramic structure makes the guide wheel lighter (reduced to 1 / 3-1 / 4 of the weight of a metal guide wheel), has a smaller moment of inertia, and reduces the impact on the transmission mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a guide wheel in the prior art;

[0014] Figure 2 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0015] Figure 3 (a) is a schematic diagram of the structure of the ceramic tube in Example 1;

[0016] Figure 3 (b) is a schematic diagram of the structure of the porous ceramic shaft in Example 1;

[0017] Figure 4 This is a schematic diagram of the structure of Example 2 of the present invention.

[0018] In the figure:

[0019] 100-guide wheel body; 11-limiting groove; 2-flange; 101-ceramic tube; 31-thorn strip; 4-PU adhesive layer; 102-metal tube; 103-porous ceramic shaft. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0021] Example 1

[0022] See attached Figure 2 As shown, a guide wheel structure for a solar cell slicer in this embodiment includes a guide wheel body 100, wherein the guide wheel body 100 includes a ceramic tube 101, wherein a porous ceramic shaft 103 is mounted inside the ceramic tube 101, and the ceramic tube 101 and the porous ceramic shaft 103 are relatively stationary; flanges 2 are fixedly mounted at both ends of the guide wheel body 100 for connecting to the outside. A PU adhesive layer 4 is provided on the outer surface of the ceramic tube 103, and a wire groove for routing the cutting wire is provided on the PU adhesive layer 4. In this embodiment, the porous ceramic shaft 103 is a ceramic shaft made of ceramic material with a hollow or porous structure inside.

[0023] The flange 2 and the porous ceramic shaft 103 may be mounted in a variety of ways.

[0024] One method of fixing is to use a shrink fit method, and the specific operation of the shrink fit method is as follows: grooves are provided at both ends of the porous ceramic shaft 103, and the porous ceramic shaft 103 is heated so that the grooves on the porous ceramic shaft 103 expand under heating, and the insertion end of the flange 2 is inserted into the grooves, and then the porous ceramic shaft 103 is waited for natural cooling; the grooves will shrink slightly naturally after cooling, thereby clamping the insertion end of the flange 2.

[0025] Another method is to fix by cold fitting. The specific operation of cold fitting is as follows: cool the flange 2 to shrink the volume of the flange 2, then insert the insertion end of the flange 2 into the slot on the porous ceramic shaft 103, wait for the flange 2 to return to normal temperature, and the volume of the flange 2 will return to its original state, so that it is fixed in the slot.

[0026] The ceramic tube 101 in this embodiment can also be fixed on the porous ceramic shaft 103 in various ways.

[0027] The first method is to fix by gluing, that is, coating a layer of glue on the outer surface of the porous ceramic shaft 103 , then sleeve the ceramic tube 101 on the porous ceramic shaft 103 , and wait for the glue to solidify, so that the ceramic tube 101 is fixed on the porous ceramic shaft 103 .

[0028] The second method uses a keyway to fix, where corresponding first and second slot bodies are distributed at corresponding positions of the porous ceramic shaft 103 and the ceramic tube 101, and the key is inserted into the first and second slot bodies to fix the porous ceramic shaft 103 and the ceramic tube 101 together.

[0029] The third type: Figure 3 (a) is a schematic diagram of the structure of the ceramic tube 101, on the inner side of which are arranged thorn strips 31 distributed in a straight line. The cross section of the thorn strips 31 is not limited to a triangle, and other structures such as a trapezoid can also be used. Figure 3 (b) is a schematic diagram of the structure of the porous ceramic shaft 103, and a limiting groove 11 adapted to the thorn strip 31 is arranged along the axial direction of the porous ceramic shaft 103. The porous ceramic shaft 103 is inserted into the ceramic tube 101, and then the flange 2 is fixed on the porous ceramic shaft 103. When the porous ceramic shaft 103 rotates in the radial direction, it is constrained by the thorn strip 31 and the limiting groove 11, so that the ceramic tube 101 is prevented from being offset relative to the porous ceramic shaft 103.

[0030] The fourth method: an annular groove matching the diameter of the ceramic tube 101 is provided on the inner side of the flange 2, and the ceramic tube 101 can be inserted into the annular groove. In addition to the fixing between the two by gluing, shrink fitting, and cold fitting, a toothed portion can be provided at the bottom of the annular groove, and a limiting slot corresponding to the toothed portion is provided on the side wall of the ceramic tube 101. When assembling, the toothed portion is inserted into the limiting slot, so that the ceramic tube 101 is fixedly connected to the flange 2, and the flange 2 is fixed to the porous ceramic shaft 103, thereby effectively avoiding the positional displacement of the ceramic tube 101 relative to the porous ceramic shaft 103.

[0031] This embodiment adopts a porous ceramic shaft 103 and a ceramic tube 101 on the outside thereof, thereby enhancing the overall strength and rigidity of the guide wheel and adapting to high torque and high speed operation; the operating state is more stable and reliable, the accuracy is higher, the jump is smaller, and it is suitable for ultra-fine diamond wire cutting, and the cutting accuracy and cutting efficiency are improved, and the cutting length is longer; the ceramic material is corrosion-resistant and has a longer service life; the porous ceramic structure makes the guide wheel lighter (reduced to 1 / 3-1 / 4 of the weight of a metal guide wheel), has a smaller moment of inertia, and reduces the impact on the transmission mechanism.

[0032] Example 2

[0033] A guide wheel structure for a solar cell slicer in this embodiment includes a guide wheel body 100, wherein the guide wheel body 100 includes a ceramic tube 101, wherein a metal tube 102 is sleeved inside the ceramic tube 101, and the ceramic tube 101 and the metal tube 102 are relatively stationary; flanges 2 are fixedly installed at both ends of the guide wheel body 100 for connecting to the outside. A PU adhesive layer 4 is provided on the outer surface of the ceramic tube 103, and a wire groove for routing the cutting wire is provided on the PU adhesive layer 4. In this embodiment, the metal tube 102 is a metal tube with a hollow structure and a certain thickness.

[0034] The flange 2 and the metal pipe 102 may be installed in various ways.

[0035] The first method is to directly weld the flange 2 to both ends of the metal pipe 102 and fix them together.

[0036] The second method is to fix by means of shrink fitting, and the specific operation of shrink fitting is as follows: heat the metal tube 102 so that the openings at both ends of the metal tube 102 expand under the heating state, insert the insertion end of the flange 2 into the openings at both ends of the metal tube 102, and then wait for the metal tube 102 to cool naturally; the openings at both ends of the metal tube 102 return to their natural state after cooling, and then clamp the insertion end of the flange 2.

[0037] The third method is to fix it by cold fitting. The specific operation of cold fitting is as follows: cool the flange 2 to shrink the volume of the flange 2, then insert the insertion end of the flange 2 into the openings at both ends of the metal tube 102, and wait for the flange 2 to return to normal temperature. During this process, the volume of the flange 2 will return to its original state, so that it is fixed on the metal tube 102.

[0038] The ceramic tube 101 in this embodiment can also be fixed on the metal tube 102 in various ways.

[0039] The first method is to fix the ceramic tube 101 on the metal tube 102 by means of glue, that is, a layer of glue is applied on the outer surface of the metal tube 102 , and then the ceramic tube 101 is sleeved on the metal tube 102 , and the ceramic tube 101 is fixed on the metal tube 102 after the glue solidifies.

[0040] The second method uses a keyway to fix the metal tube 102 and the ceramic tube 101. A first slot body and a second slot body corresponding to each other are distributed at corresponding positions of the metal tube 102 and the ceramic tube 101. The key is inserted into the first slot body and the second slot body to fix the metal tube 102 and the ceramic tube 101 together.

[0041] The third type: The inner side surface of the ceramic tube 101 is provided with thorn bars 31 distributed in a straight line. The cross-section of the thorn bars 31 is not limited to a triangle, and other structures such as a trapezoid can also be adopted. The outer side surface of the metal tube 102 is provided with a limiting groove 11 that is compatible with the thorn bar 31 along the axial direction of the metal tube 102. The metal tube 102 is inserted into the ceramic tube 101, and then the flange 2 is fixed on the metal tube 102. When the metal tube 102 rotates in the radial direction, it is restricted by the thorn bars 31 and the limiting grooves 11, which effectively avoids the position displacement of the ceramic tube 101 relative to the metal tube 102.

[0042] The fourth method: an annular groove matching the diameter of the ceramic tube 101 is provided on the inner side of the flange 2, and the ceramic tube 101 can be inserted into the annular groove. In addition to the fixing between the two by gluing, shrink fitting, and cold fitting, a toothed portion can be provided at the bottom of the annular groove, and a limiting slot corresponding to the toothed portion is provided on the side wall of the ceramic tube 101. When assembling, the toothed portion is inserted into the limiting slot, so that the ceramic tube 101 is fixedly connected to the flange 2, and the flange 2 is fixed to the metal tube 102, thereby effectively avoiding the positional displacement of the ceramic tube 101 relative to the metal tube 102.

[0043] This embodiment adopts a combination of ceramic materials and metal materials to enhance the overall strength and rigidity of the guide wheel, and adapt to high torque and high speed operation; the operating state is more stable and reliable, the accuracy is higher, the jump is smaller, and it is suitable for ultra-fine diamond wire cutting, and the cutting accuracy and cutting efficiency are improved, and the cutting length is longer; the ceramic material is corrosion-resistant and has a longer service life; the inner layer of the embedded metal tube has good toughness and can withstand a certain impact, making the equipment operation safer; the hollow structure is adopted, the guide wheel is lighter, the moment of inertia is small, and the impact on the transmission mechanism is reduced.

[0044] The above implementation modes are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A guide wheel structure for a solar cell slicer, comprising a guide wheel body (100), Features: The guide wheel body (100) comprises a ceramic tube (101), and a metal tube (102) or a porous ceramic shaft (103) sleeved inside the ceramic tube (101); the ceramic tube (101) and the metal tube (102) or the porous ceramic shaft (103) are relatively stationary; The metal tube (102) is a metal tube with a hollow structure; the porous ceramic shaft (103) is a ceramic shaft made of ceramic material with a hollow or porous structure inside; The ceramic tube (101) is installed on the metal tube (102) or the porous ceramic shaft (103) by gluing, tight fitting or key connection; Flanges (2) are provided at both ends of the metal tube (102) or the porous ceramic shaft (103); a PU adhesive layer is provided on the ceramic tube (101), and a wire groove for routing the cutting wire is provided on the PU adhesive layer; An annular groove matching the diameter of the ceramic tube is arranged on the inner end surface of the flange, a toothed portion is arranged in the annular groove, and a limiting slot hole matching the toothed portion is arranged on the side wall of the ceramic tube.

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