A graphite carbon brush type roll cooling device

Abstract

This invention discloses a graphite carbon brush type roll cooling device, comprising a first housing and a second housing that surround the roll shaft head after being joined, and multiple cooling units evenly distributed within the first and second housings; cooling water pipes are connected in series between the multiple cooling units; each cooling unit includes a mounting base fixed in the cavity of the first or second housing, a graphite block placed in the mounting base, and an elastic component for keeping the graphite block in constant contact with the roll shaft head. This invention employs external cooling, utilizing the graphite block through which cooling water flows to directly cool the roll, reducing the impact of temperature on the main component—the roll. Compared to existing methods that set cooling water channels within the bearing housing, this invention reduces heat transfer links (cooling water directly acts on the roll), lowers thermal resistance, and thus improves cooling efficiency. This invention is used to remove the heat generated by the roll during the production process of a roll press, ensuring stable operation of the equipment.

Description

Technical Field

[0001] This invention belongs to the field of lithium-ion battery production technology, and relates to a device for cooling rolls in the rolling process, specifically a graphite carbon brush type roll cooling device. Background Technology

[0002] With the widespread application of lithium-ion batteries in national-level projects and consumer demand, the market demand for lithium-ion batteries is increasing, prompting lithium-ion battery factories to continuously improve equipment production speed in order to achieve higher production capacity.

[0003] Currently, the operating speed of equipment in the rolling process of lithium-ion battery production has reached 120 m / min or higher. During the high-speed production of electrodes in the rolling process, the friction between the electrode and the rolls, as well as the rolling friction of the bearings, generates a large amount of heat. Since the upper and lower rolls, main bearings, pre-bending bearings, and bearing seats in existing rolling mills are all metal components, these metal components will expand and contract due to the heat, causing their dimensions to change. This situation alternates between high-speed operation and production shutdown.

[0004] The key characteristic parameter in the rolling process is the thickness of the electrode sheet after rolling, which is on the order of micrometers and places extremely high technical demands on the stability of the equipment. Therefore, the thermal expansion and contraction of the various metal components in the rolling mill mentioned above due to the heat generated during operation will greatly affect the accuracy of the rolled electrode sheet (i.e., the rolling thickness).

[0005] Components directly affecting the accuracy of roll forming thickness include the rolls, bearings, and bearing housings, with the rolls having the greatest impact. Currently, the main method for controlling roll temperature is to indirectly control the roll temperature by adding cooling water channels inside the bearing housing and using circulating cooling water to cool the bearing housing. This method has several problems: Firstly, heat conduction occurs through the rolls → bearings → bearing housings → circulating cooling water, resulting in a long heat conduction distance, slow action time, high thermal resistance, and low efficiency. Secondly, the circulation of a large amount of cooling water inside the bearing housing can cause condensation on the outer layer of metal parts, and there is also a risk of leakage, which can make the equipment prone to rust and corrosion. Thirdly, blockages in the cooling water channels are not easily detected, leading to unreasonable temperature control of the rolls, fluctuations in roll thickness data, and affecting product quality. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention aims to provide a graphite carbon brush type roll cooling device to improve cooling efficiency and reduce the risk of rust and corrosion of related metal components.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a graphite carbon brush type roll cooling device, comprising a first housing and a second housing that surround the roll shaft head after being joined together, and a plurality of cooling units evenly distributed within the first housing and the second housing; Multiple cooling units are connected in series with cooling water pipes; The cooling unit includes a mounting base fixed in the cavity of the first housing or the second housing, a graphite block placed in the mounting base, and an elastic component for keeping the graphite block in constant contact with the roll head.

[0008] As a limitation of the present invention, the elastic component is a spring guide post, including an integrally formed threaded part and an optical axis part, wherein a spring for pressing the graphite block is sleeved on the optical axis part; The threaded portion of the spring guide post extends from the inside of the mounting base to the outside of the first housing or the second housing, and the threaded portion is threadedly connected to the mounting base.

[0009] As a further limitation of the present invention, a nut for fixing the threaded portion of the spring guide post is disposed on the outside of the first housing or the second housing.

[0010] As another limitation of the present invention, through holes are provided at the relative positions of the mounting bases in every two adjacent cooling units; Each graphite block has a through hole for cooling water to pass through, and the two ends of the through hole are threaded and fitted with quick-release connectors; the through holes on the graphite block correspond to the positions of the through holes on the mounting base; Cooling water pipes pass through the through-holes in the mounting base and are connected to graphite blocks in every two adjacent cooling units via quick-release couplings.

[0011] As a further limitation of the present invention, a viewing window is provided on one side of the mounting base, and a scale line is provided on one side of the viewing window to mark the wear condition of the graphite block.

[0012] As a third limitation of the present invention, both the first housing and the second housing are semi-annular U-shaped grooves with openings facing the surface of the roll head; the first housing and the second housing are fixed together by mounting bolts.

[0013] As a further limitation of the present invention, both the first housing and the second housing are fixed on the bearing seat of the roll head by a connecting bracket to achieve a circumferential fixation on the roll head.

[0014] As a further limitation of the present invention, the connecting bracket is provided with first bolt holes at both ends; and the bearing seat is provided with second bolt holes at corresponding positions of the first housing or the second housing. The connecting bracket connects the bearing housing to the first housing or the second housing via positioning bolts.

[0015] By adopting the above-described technical solution, the beneficial effects achieved by this invention compared to the prior art are as follows: (1) The present invention adopts an external cooling method, which uses graphite blocks through which cooling water is introduced to directly cool the roll, reducing the influence of temperature on the main component - the roll. Compared with the existing method of setting cooling water channels in the bearing housing, the present invention can reduce the heat transfer links (cooling water directly acts on the roll), reduce the thermal resistance, and thus improve the cooling efficiency.

[0016] Using graphite as a cooling conductor can fully utilize the advantages of graphite, such as good thermal conductivity, strong self-healing ability, and good self-lubrication, thereby reducing thermal resistance and improving conduction efficiency.

[0017] (2) The present invention uses water to flow through the internal channels of graphite blocks instead of water to flow through the inside of the bearing housing, which effectively avoids the phenomenon of internal leakage and external condensation of the bearing housing, thereby reducing the risk of rust and corrosion of related metal parts.

[0018] In addition, the external cooling method adopted in this invention makes it easy to observe leakage and blockage, and also facilitates the handling of problems such as leakage and pipe blockage. Routine maintenance and repair can be carried out without disassembling heavy components or using professional lifting equipment.

[0019] (3) The present invention has low processing cost and short testing cycle. Previously, after drilling holes inside the bearing housing, it was necessary to spend a long time to test and repair leaks. The present invention uses low-value raw materials, has a simple processing method and is easy to produce, and the installation and leak testing work is also simpler. Attached Figure Description

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a simplified structural diagram of an embodiment of the present invention; Figure 2 This is a side view of the structural relationship between the first shell and the second shell after they are assembled in an embodiment of the present invention; Figure 3 This is a front view showing the structural relationship of the cooling unit in an embodiment of the present invention; Figure 4 This is a front view showing the structural relationship of the mounting base in an embodiment of the present invention; Figure 5 This is a front view showing the structural relationship of the spring guide post in an embodiment of the present invention; Figure 6 This is a schematic diagram of the installation position of the present invention on the roller press according to an embodiment of the invention; In the diagram: 1. First housing; 2. Second housing; 3. Cooling unit; 4. Cooling water pipe; 5. Mounting bolt; 6. Nut; 7. Inlet pipe; 8. Outlet pipe; 9. Roll shaft head; 10. Upper roll; 11. Lower roll; 12. Main bearing; 13. Main bearing housing; 14. Pre-bent bearing; 15. Pre-bent bearing housing; 16. Connecting bracket; 17. Cooling device; 18. Electrode; 301. Mounting base; 302. Graphite block; 303. Spring guide post; 304. Through hole; 305. Viewing window; 306. Scale line; 307. Threaded part; 308. Optical axis part; 309. Spring. Detailed Implementation

[0022] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustrative and understanding purposes only and are not intended to limit the scope of the invention.

[0023] Example 1: A graphite carbon brush type roll cooling device like Figure 1 As shown, this embodiment includes a first housing 1 and a second housing 2 that surround the roll head 9 after being joined together, and a plurality of cooling units 3 evenly distributed within the first housing 1 and the second housing 2. In this embodiment, the cooling units 3 are fixed to the roll head 9 through the first housing 1 and the second housing 2, forming an external cooling structure to directly cool the roll, thereby removing the heat generated by the roll during the production process of the roll press and keeping the equipment in a stable operating state.

[0024] Both the first housing 1 and the second housing 2 are semi-annular U-shaped grooves, such as Figure 2 As shown, the first housing 1 and the second housing 2 are fixed on both sides by mounting bolts 5 after being assembled. After encircling the roll head 9, the openings of both the first housing 1 and the second housing 2 face the surface of the roll head 9. Figure 6 As shown, in this embodiment, both the first housing 1 and the second housing 2 are fixed to the bearing seat of the roll head 9 via a connecting bracket 16, thereby achieving a circumferential fixation on the roll head 9. Specifically, the connecting bracket 16 has first bolt holes at both ends, and the bearing seat (in this embodiment, the pre-bent bearing seat 15 on the roll head 9) and the first housing 1 and the second housing 2 are each provided with a second bolt hole, and the second bolt hole on the first housing 1 or the second housing 2 corresponds to a second bolt hole on the bearing seat.

[0025] Taking the fixing of the first housing 1 on the bearing housing as an example, the specific installation method is described as follows: After aligning the first bolt hole at one end of the connecting bracket 16 with the second bolt hole of the first housing 1, the positioning bolt is installed to realize the connection between the first housing 1 and the connecting bracket 16; after aligning the first bolt hole at the other end of the connecting bracket 16 with the second bolt hole on the bearing housing, the positioning bolt is also installed to realize the connection between the bearing housing and the connecting bracket 16.

[0026] Multiple cooling units 3 are evenly distributed within the first housing 1 and the second housing 2, and cooling water pipes 4 are connected in series between the multiple cooling units 3 to allow cooling water to be introduced to cool the directly contacting roll head 9. It should be noted in advance that the specific number of cooling units 3 can be adjusted according to the roll diameter; in this embodiment, eight cooling units 3 are used for illustration.

[0027] Specifically, such as Figure 1 and Figure 3 As shown, the cooling unit 3 includes a mounting base 301, a graphite block 302 placed in the mounting base 301, and an elastic component for pressing the graphite block 302 to keep it always in contact with the roll head 9. The mounting base 301 is a stainless steel shell, which is fixed in the cavity of the first shell 1 or the second shell 2 by welding. Figure 4 As shown, a viewing window 305 is provided on one side of the mounting base 301 extending outside the cavity of the first housing 1 or the second housing 2. A scale line 306 is arranged on one side of the viewing window 305 to indicate the wear condition of the graphite block 302. Each pair of adjacent mounting bases 301 in the cooling unit 3 has a through hole at a relative position for the passage of the cooling water pipe 4. The graphite block 302 uses high-quality graphite (high-efficiency, high-quality, high-quality) and has a through hole 304 inside for the passage of cooling water. Figure 1 As shown, the two ends of the through hole 304 on the graphite block 302 correspond to the positions of the through holes on the mounting base 301, so that the cooling water pipe 4 can be connected to the through hole of the graphite block 302 after passing through the through hole of the mounting base 301. In order to achieve quick docking between the graphite block 302 and the cooling water pipe 4, so that the graphite block 302 can be quickly replaced, in this embodiment, both ends of the through hole of the graphite block 302 are equipped with quick-release connectors.

[0028] In practical applications, every two adjacent graphite blocks 302 are connected by a cooling water pipe 4, and two quick-release connectors are provided to connect the inlet pipe 7 and the outlet pipe 8 respectively. In this embodiment, the cooling water pipe 4 uses an existing connecting hose.

[0029] Furthermore, the elastic component is a spring guide post 303. For example... Figure 5As shown, the spring guide post 303 includes an integrally formed threaded portion 307 and an optical axis portion 308, wherein a spring 309 for pressing the graphite block 302 is sleeved on the optical axis portion 308. Specifically, the optical axis portion 308 and the spring 309 are located between the graphite block 302 and the mounting base 301. The length of the optical axis portion 308 is shorter than the length of the spring 309 to ensure that the spring 309 has compression space and does not shift. The threaded portion 307 extends from the inside of the mounting base 301 to the outside of the first housing 1 or the second housing 2 to fix the spring guide post 303 in the mounting base 301.

[0030] Specifically, the top of the mounting base 301 has a threaded hole, and the threaded portion 307 of the spring guide post 303 is assembled onto the mounting base 301 through the threaded hole. In addition, a nut 6 is disposed on the outside of the first housing 1 or the second housing 2 to fix the threaded portion 307 of the spring guide post 303. This embodiment uses a double-threaded structure to position the spring guide post 303, which can prevent the position of the spring guide post 303 from changing during equipment operation, thereby ensuring that the graphite block 302 always fits against the roll head 9.

[0031] When in use, turning the spring guide post 303 can control the spring guide post 303 to extend or retract, thereby adjusting the graphite block 302 to always contact the roll head 9 according to the wear degree of the graphite block 302.

[0032] The cooling device 17 described in this embodiment is configured on the roller press as follows: Typically, this embodiment is added to both sides of the upper roll 10 and lower roll 11 of a roller press to dissipate the heat generated during production. Specifically, as shown below... Figure 6 As shown, the main components of the existing roller press include an upper roller 10 and a lower roller 11. Both sides of the upper roller 10 and the lower roller 11 are equipped with a main bearing 12, a main bearing housing 13, a pre-bending bearing 14, and a pre-bending bearing housing 15. The electrode sheet 18 to be rolled is located between the upper roller 10 and the lower roller 11. In practice, in this embodiment, the bearing housing 13 and the pre-bending bearing housing 15 are located between the shaft ends of the upper roller 10 and the lower roller 11. Of course, depending on the actual situation, this embodiment can also be located at the shoulder or end of the shaft of the upper roller 10 and the lower roller 11.

[0033] It should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A graphite carbon brush type roll cooling device, characterized in that: It includes a first housing and a second housing that surround the roll shaft head after being joined together, and a plurality of cooling units evenly distributed within the first housing and the second housing; Multiple cooling units are connected in series with cooling water pipes; The cooling unit includes a mounting base fixed in the cavity of the first housing or the second housing, a graphite block placed in the mounting base, and an elastic component for keeping the graphite block in constant contact with the roll head.

2. The graphite carbon brush type roll cooling device according to claim 1, characterized in that: The elastic component is a spring guide post, which includes an integrally formed threaded part and a light shaft part, wherein a spring for pressing the graphite block is sleeved on the light shaft part; The threaded portion of the spring guide post extends from the inside of the mounting base to the outside of the first housing or the second housing, and the threaded portion is threadedly connected to the mounting base.

3. The graphite carbon brush type roll cooling device according to claim 2, characterized in that: The exterior of either the first or second housing is provided with a nut for securing the threaded portion of the spring guide post.

4. A graphite carbon brush type roll cooling device according to any one of claims 1-3, characterized in that: A through hole is provided at the relative position of the mounting base in each pair of adjacent cooling units; Each graphite block has a through hole for cooling water to pass through, and the two ends of the through hole are threaded and fitted with quick-release connectors; the through holes on the graphite block correspond to the positions of the through holes on the mounting base; Cooling water pipes pass through the through-holes in the mounting base and are connected to graphite blocks in every two adjacent cooling units via quick-release couplings.

5. A graphite brush type roll cooling device according to claim 4, characterized in that: The mounting base has a viewing window on one side, and a scale line on one side of the viewing window to indicate the wear of the graphite block.

6. A graphite carbon brush type roll cooling device according to any one of claims 1-3 and 5, characterized in that: Both the first and second housings are semi-annular U-shaped grooves with openings facing the surface of the roll head; the first and second housings are fixed together by mounting bolts.

7. The graphite carbon brush type roll cooling device according to claim 6, characterized in that: Both the first and second housings are fixed to the bearing seats on the roll head via connecting brackets to achieve a circumferential fixation on the roll head.

8. A graphite carbon brush type roll cooling device according to claim 7, characterized in that: The connecting bracket is provided with first bolt holes at both ends; the bearing seat is provided with second bolt holes at corresponding positions on the first housing or the second housing; The connecting bracket connects the bearing housing to the first housing or the second housing via positioning bolts.

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