Air float roller

Abstract

The utility model discloses a kind of air floatation roller, including shell and the current tube being set in the shell, the both ends of the current tube are respectively connected in the both ends inner wall of the shell, hollow layer is formed between the current tube and the shell, the shell has air floatation roller face, the current tube is provided with several current holes, at least one end of the shell is provided with air inlet pipeline, the air inlet pipeline extends to the current tube, the outside of the shell is provided with ultrasonic generator, the hollow layer is provided with several transducers, the ultrasonic generator is electrically connected with several the transducer. The utility model can reduce the deviation of pole piece in transmission process, enhance the interface bonding force of pole piece coating and current collector, improve the drying efficiency of pole piece.

Description

Technical Field

[0001] This utility model relates to the field of air flotation roller technology, and specifically to an air flotation roller. Background Technology

[0002] In the electrode coating process, in order to reduce the damage to the current collector on the electrode surface, air flotation rollers are usually used to transport the electrode in a non-contact manner.

[0003] However, the existing air flotation rollers have poor uniformity of air outlet on the roller surface, resulting in unstable floating height or large air outlet on one side of the roller surface. In addition, the consistency of wind speed direction between the roller surface and the electrode sheet causes the electrode sheet to move on one side, which in turn makes the electrode sheet prone to deviation during transmission.

[0004] Furthermore, the slurry coated on the electrode surface has high viscosity, a slow solvent diffusion rate, and a long drying time. Insufficient interfacial adhesion between the electrode coating and the current collector (aluminum foil or copper foil) can easily lead to a decrease in battery cycle life. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model provides an air flotation roller, which can reduce the deviation of the electrode sheet during the transmission process, enhance the bonding force between the electrode sheet coating and the current collector interface, and improve the drying efficiency of the electrode sheet.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] An air-bearing roller includes a housing and a flow equalization tube disposed within the housing. The two ends of the flow equalization tube are respectively connected to the inner walls of the two ends of the housing. A hollow layer is formed between the flow equalization tube and the housing. The housing has an air-bearing roller surface. The flow equalization tube is provided with a plurality of flow equalization holes. An air inlet pipe is provided at at least one end of the housing and extends into the flow equalization tube. An ultrasonic generator is disposed outside the housing. A plurality of transducers are disposed in the hollow layer. The ultrasonic generator is electrically connected to the plurality of transducers.

[0008] As a further improvement to the above technical solution, the air flotation roller surface is a semi-circular arc roller surface, and the semi-circular arc roller surface is coaxially arranged with the flow equalization pipe.

[0009] As a further improvement to the above technical solution, a plurality of the transducers are arranged in a semi-circular array on the outer wall of the flow equalization tube, and the plurality of the transducers correspond to the air flotation roller.

[0010] As a further improvement to the above technical solution, the transducer is provided with an amplitude transformer, which faces the air flotation roller surface.

[0011] As a further improvement to the above technical solution, the amplitude rod is connected to the air-bearing roller surface.

[0012] As a further improvement to the above technical solution, the amplitude transformer has a stepped structure, and the small end of the amplitude transformer is connected to the air flotation roller surface.

[0013] As a further improvement to the above technical solution, several of the flow equalization holes correspond to the air flotation roller surface and are distributed in a ring array.

[0014] As a further improvement to the above technical solution, the number of air intake pipes is two, and the two air intake pipes are respectively connected to the two ends of the outer casing.

[0015] As a further improvement to the above technical solution, the air flotation roller surface is provided with several micro grooves.

[0016] As a further improvement to the above technical solution, the air-floating roller surface is made of a porous medium material.

[0017] The beneficial effects of this utility model are as follows: This utility model provides an air-floating roller. By setting a flow equalization pipe, an ultrasonic generator, and a transducer, the gas entering the hollow layer can be more uniform through several flow equalization holes on the flow equalization pipe, so that the gas can flow out from the air-floating roller surface evenly, making the floating height of the electrode more stable and reducing the situation of large air volume on one side of the roller surface. At the same time, the ultrasonic generator outside the shell is powered on and works. The high-frequency electrical signal generated by the ultrasonic generator is transmitted to the transducer. The transducer converts the high-frequency electrical signal provided by the ultrasonic generator into mechanical vibration to generate ultrasonic waves.

[0018] First, ultrasound can disrupt the consistency of wind speed direction between the air flotation roller surface and the electrode, thereby reducing the deviation of the electrode during transmission.

[0019] Secondly, when high-frequency ultrasound passes through the medium, it causes the medium molecules to vibrate violently. During this process, an instantaneous acceleration exceeding ten thousand times the acceleration due to gravity is applied to the medium molecules. Under the influence of this strong acceleration, the medium molecules, under the action of inertial force, will exhibit a tendency to move in the opposite direction to the instantaneous acceleration. The inertial force of the medium molecules far exceeds the upward capillary force on the binder, thereby inhibiting the rise of the binder and enhancing the bonding force between the electrode coating and the current collector interface.

[0020] Third, the ultrasonic waves act directly on the surface of the air flotation roller, causing the gas between the air flotation roller and the electrode to vibrate at high frequency, which enhances the convective heat transfer coefficient on the back of the electrode. At the same time, the ultrasonic waves generate micro-eddies in the coating, which improves the solvent diffusion coefficient, thereby improving the drying efficiency of the electrode. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1This is a structural schematic diagram provided by an example of this utility model;

[0023] Figure 2 This is a partial structural schematic diagram of the present invention;

[0024] Figure 3 This is a cross-sectional view of the present invention.

[0025] Reference numerals: 100-outer shell, 110-air flotation roller surface, 200-flow equalization pipe, 210-flow equalization hole, 300-air inlet pipe, 400-ultrasonic generator, 500-transducer, 600-amplifier rod. Detailed Implementation

[0026] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0027] Reference Figures 1 to 3 An example of this utility model provides an air flotation roller, including a shell 100 and a flow equalization pipe 200 disposed inside the shell 100. The two ends of the flow equalization pipe 200 are respectively connected to the inner walls of the two ends of the shell 100. A hollow layer is formed between the flow equalization pipe 200 and the shell 100. The shell 100 has an air flotation roller surface 110. The flow equalization pipe 200 is provided with a plurality of flow equalization holes 210. At least one end of the shell 100 is provided with an air inlet pipe 300, which extends into the flow equalization pipe 200. An ultrasonic generator 400 is disposed outside the shell 100. A plurality of transducers 500 are disposed in the hollow layer. The ultrasonic generator 400 is electrically connected to the plurality of transducers 500.

[0028] Understandably, gas enters the flow equalization tube 200 from the air inlet pipe 300. The gas inside the flow equalization tube 200 flows into the hollow layer between the flow equalization tube 200 and the outer shell 100 through several flow equalization holes 210. The gas in the hollow layer flows out from the air flotation roller surface 110 of the outer shell 100, forming an air flotation effect to achieve non-contact support for the electrode. The several flow equalization holes 210 can make the gas entering the hollow layer more uniform, so that the gas can flow out from the air flotation roller surface 110 evenly, making the floating height of the electrode more stable and reducing the situation of large air volume on one side of the roller surface. At the same time, the ultrasonic generator 400 outside the outer shell 100 is powered on and works. The high-frequency electrical signal generated by the ultrasonic generator 400 is transmitted to the transducer 500. The transducer 500 converts the high-frequency electrical signal provided by the ultrasonic generator 400 into mechanical vibration to generate ultrasonic waves.

[0029] First, ultrasonic waves can disrupt the consistency of the wind speed direction between the air flotation roller surface 110 and the electrode, thereby reducing the deviation of the electrode during transmission.

[0030] Secondly, when high-frequency ultrasound passes through the medium, it causes the medium molecules to vibrate violently. During this process, an instantaneous acceleration exceeding ten thousand times the acceleration due to gravity is applied to the medium molecules. Under the influence of this strong acceleration, the medium molecules, under the action of inertial force, will exhibit a tendency to move in the opposite direction to the instantaneous acceleration. The inertial force of the medium molecules far exceeds the upward capillary force on the binder, thereby inhibiting the rise of the binder and enhancing the bonding force between the electrode coating and the current collector interface.

[0031] Third, the ultrasonic waves act directly on the air flotation roller surface 110, causing the gas between the air flotation roller and the electrode to vibrate at high frequency, which enhances the convective heat transfer coefficient on the back of the electrode. At the same time, the ultrasonic waves generate micro-eddies in the coating, which improves the solvent diffusion coefficient, thereby accelerating the drying of the electrode.

[0032] In some preferred embodiments, the air flotation roller surface 110 is a semi-circular arc roller surface, which is coaxially arranged with the flow equalization pipe 200, so that the distance between the air flotation roller surface 110 and the flow equalization pipe 200 is consistent. After the gas enters the hollow layer from the flow equalization hole 210, it diffuses evenly along the semi-circular arc air flotation roller surface 110. On the one hand, it makes the air outlet of the air flotation roller surface 110 more uniform and the floating height of the electrode more stable, further reducing the phenomenon of electrode deviation. On the other hand, the airflow flowing out from the semi-circular arc roller surface can form an air film of the corresponding shape, which can better adapt to the small deformation or bending of the electrode during the electrode transportation process, reduce local stress concentration, and reduce the risk of damage to the current collector on the electrode surface.

[0033] Furthermore, several transducers 500 are arranged in a semi-circular array on the outer wall of the flow equalization tube 200. The transducers 500 correspond to the air-bearing roller surface 110, so that the ultrasonic waves generated by the transducers 500 are transmitted radially along the outer wall of the flow equalization tube 200 to the air-bearing roller surface 110, thereby achieving directional transmission, reducing vibration offset, and ensuring that the ultrasonic force on the gas flowing out of the air-bearing roller surface 110 is consistent in all areas of the electrode surface, thus improving the stability of the air-bearing roller support.

[0034] Furthermore, the transducer 500 is equipped with an amplitude transformer 600, which faces the air-bearing roller surface 110. The amplitude transformer 600 can amplify the tiny mechanical vibrations generated by the transducer 500 and transmit the ultrasonic waves directionally to the air-bearing roller surface 110, thereby improving working efficiency and reducing energy consumption.

[0035] Furthermore, the amplitude transformer 600 is connected to the air-bearing roller surface 110, thereby enabling ultrasonic vibration to act directly on the air-bearing roller surface 110, reducing the loss and attenuation of ultrasonic vibration energy during transmission.

[0036] Specifically, the amplitude transformer 600 has a stepped structure. The small end of the amplitude transformer 600 is connected to the air flotation roller surface 110. The stepped amplitude transformer 600 is connected by a stepped transition between the large cross-section end at the input end and the small cross-section end at the output end. The amplitude is amplified by utilizing the difference in cross-sectional area. By adjusting the length ratio and cross-sectional ratio of the stepped sections, the amplification factor can be precisely controlled to meet the amplitude requirements of different processes.

[0037] In some preferred embodiments, a plurality of flow equalization holes 210 correspond to the air flotation roller surface 110 and are distributed in a ring array. The ring array of flow equalization holes 210 and the semi-circular air flotation roller surface 110 form a stable air outlet path, thereby ensuring that the gas entering the hollow layer diffuses uniformly to the air flotation roller surface 110 along the radial direction of the flow equalization pipe 200, so that the air outlet volume of the air flotation roller surface 110 remains consistent in the radial direction, forming a continuous and stable air flotation support, and reducing the change in the floating height of the electrode caused by airflow fluctuations.

[0038] In some preferred embodiments, there are two air inlet pipes 300, which are respectively connected to the two ends of the outer shell 100. The two air inlet pipes 300 enter the flow equalization pipe 200 from both ends of the outer shell 100 at the same time, realizing synchronous air supply from both ends. A dynamic balance pressure stabilizing cavity is formed inside the flow equalization pipe 200, thereby reducing air supply pressure fluctuations and ensuring that the airflow in the hollow layer is evenly diffused along several flow equalization holes 210, further improving the uniformity of air outlet from the air flotation roller surface 110 and improving the stability of electrode conveying.

[0039] In some preferred embodiments, the air flotation roller surface 110 is provided with a plurality of microgrooves, which are evenly distributed on the air flotation roller surface 110, thereby enhancing the uniformity of gas diffusion and improving the stability of electrode conveying.

[0040] Specifically, several microgrooves are laser-engraved, which allows for precise control of the microgrooves' geometry, optimizing airflow paths and reducing turbulence.

[0041] In other embodiments, the air flotation roller surface 110 is made of a porous medium material, which can be a metal sintering material or a ceramic material. The porous medium material has micron-sized pores evenly distributed on it, and the gas flows out evenly through the pores to form a continuous gas film, ensuring uniform gas output and avoiding the phenomenon of electrode misalignment.

[0042] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An air flotation roller, characterized in that, The device includes an outer shell and a flow equalization tube disposed within the outer shell. The two ends of the flow equalization tube are respectively connected to the inner walls of the two ends of the outer shell. A hollow layer is formed between the flow equalization tube and the outer shell. The outer shell has an air-floating roller surface. The flow equalization tube is provided with a plurality of flow equalization holes. An air inlet pipe is provided at at least one end of the outer shell and extends into the flow equalization tube. An ultrasonic generator is disposed outside the outer shell. A plurality of transducers are disposed in the hollow layer. The ultrasonic generator is electrically connected to the plurality of transducers.

2. The air flotation roller according to claim 1, characterized in that, The air flotation roller surface is a semi-circular arc roller surface, and the semi-circular arc roller surface is coaxially arranged with the flow equalization pipe.

3. The air flotation roller according to claim 2, characterized in that, Several transducers are arranged in a semi-circular array on the outer wall of the flow equalization tube, and several transducers correspond to the air flotation roller.

4. The air flotation roller according to claim 3, characterized in that, The transducer is equipped with an amplitude transformer, which faces the air flotation roller surface.

5. An air flotation roller according to claim 4, characterized in that, The amplitude transformer is connected to the air-bearing roller surface.

6. The air flotation roller according to claim 4, characterized in that, The amplitude transformer has a stepped structure, and the small end of the amplitude transformer is connected to the air flotation roller surface.

7. The air flotation roller according to claim 1, characterized in that, Several of the flow equalization holes correspond to the air flotation roller surface and are distributed in a ring array.

8. The air flotation roller according to claim 1, characterized in that, There are two air intake pipes, which are respectively connected to both ends of the outer casing.

9. An air-floating roller according to claim 1, characterized in that, The air flotation roller surface is provided with several micro grooves.

10. An air-floating roller according to claim 1, characterized in that, The air-float roller surface is made of a porous media material.

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