Roller bearing structure for wet-process lithium battery diaphragm extract liquor

Abstract

The utility model relates to the technical field of lithium battery diaphragms, in particular to a roller bearing structure for wet-process lithium battery diaphragm extract liquor, which comprises a driving side bearing structure, a connecting shaft and a driven side bearing structure, a first self-aligning roller bearing arranged on the connecting shaft in a sleeving manner is positioned in a mounting space formed by buckling and connecting the driving side bearing base and the driving side bearing gland; the driving shaft head is connected with the connecting shaft and used for driving the connecting shaft to rotate; the driven side bearing base and the driven side bearing gland are connected in a buckled mode so that a second self-aligning roller bearing arranged on the connecting shaft in a sleeving mode can be installed, and the connecting shaft is sleeved with the second hole clamp spring which is used for limiting axial movement of the second self-aligning roller bearing. And the passive side sealing gland and the second inner side sealing gland are respectively pressed on two opposite sides of the passive side bearing base and the passive side bearing cover plate which are buckled with each other. The roller bearing structure used in the wet-process lithium battery diaphragm extraction liquid aims at solving the problem that a ceramic bearing adopted in the lithium battery diaphragm extraction process is prone to being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery diaphragms, in particular to a roller bearing structure used in wet-process lithium battery diaphragm extraction liquid. Background Art

[0002] Lithium battery separators are a crucial component of lithium batteries. Currently, separator production is primarily based on a wet process, with the extraction step being a critical step. The separator is driven by rollers in an extraction solution, passing through the solution and then drying to produce a stable separator. To ensure stable separator production, the extraction equipment must maintain stable, long-term operation.

[0003] The rollers in the extraction equipment are primarily driven by an external motor and reduction gearbox. The rollers, positioned within the extracting liquid, provide driving force to the membrane surface. This requires high requirements for the bearings on both sides of the rollers. On the one hand, the bearings must support the roller's high-speed motion, and on the other hand, they must function properly within the extracting liquid (dichloromethane).

[0004] Currently, the main method used is to use ceramic bearings. Ceramic bearings are resistant to high temperatures and corrosion, so they can be used in dichloromethane liquids. However, ceramic bearings are difficult to process, have high production costs, and are expensive. In addition, ceramic bearings are relatively hard and cannot withstand large impacts, which can easily cause bearing damage during production fluctuations. Currently, the use of bearing pairs requires high installation requirements. Ceramic bearings also cannot expand or contract with the equipment, placing high demands on supporting components and the environment.

[0005] Therefore, the inventors provide a roller bearing structure for use in wet-process lithium battery diaphragm extraction liquid. Utility Model Content

[0006] (1) Technical problems to be solved

[0007] The embodiment of the utility model provides a roller bearing structure for use in wet-process lithium battery diaphragm extraction liquid, which solves the technical problem that ceramic bearings are easily damaged in the lithium battery diaphragm extraction process.

[0008] (2) Technical solution

[0009] The utility model provides a roller bearing structure for wet-process lithium battery diaphragm extraction liquid, comprising a driving side bearing structure, a connecting shaft and a passive side bearing structure, wherein the two ends of the connecting shaft are respectively connected to the driving side bearing structure and the passive side bearing structure, and the driving side bearing structure drives the passive side bearing structure to rotate; wherein,

[0010] The driving side bearing structure includes a driving side bearing base, a driving side bearing cover plate, a first spherical roller bearing, a first hole retaining spring, a driving side sealing cover plate, a first inner sealing cover plate and a driving shaft head. The first spherical roller bearing sleeved on the connecting shaft is located in an installation space formed by the driving side bearing base and the driving side bearing pressure cover being fastened together. The first hole retaining spring is sleeved on the connecting shaft and is used to limit the axial movement of the first spherical roller bearing. The driving side sealing pressure cover and the first inner sealing pressure cover are respectively pressed on opposite sides of the fastened driving side bearing base and the driving side bearing pressure cover. The driving shaft head is connected to the connecting shaft and is used to drive the connecting shaft to rotate.

[0011] The passive side bearing structure includes a passive side bearing base, a passive side bearing cover plate, a second spherical roller bearing, a second hole retaining ring, a second inner sealing cover plate and a passive side sealing cover plate. The passive side bearing base is snap-fitted with the passive side bearing pressure cover to install the second spherical roller bearing sleeved on the connecting shaft. The second hole retaining ring is sleeved on the connecting shaft and is used to limit the axial movement of the second spherical roller bearing. The passive side sealing cover and the second inner sealing cover are respectively pressed on the opposite sides of the snapped passive side bearing base and the passive side bearing cover plate.

[0012] Furthermore, the driving side bearing structure further includes a first seal and a second seal. The first seal and the second seal are respectively disposed on opposite sides of the first spherical roller bearing and are used to seal the inner cavity of the first spherical roller bearing.

[0013] Furthermore, the driving side bearing structure further includes a gasket, and the first seal and / or the second seal are sleeved on the connecting shaft through the corresponding gasket.

[0014] Furthermore, the passive side bearing structure further includes a third seal, and the third seal is fittedly arranged on a side of the second spherical roller bearing facing the first spherical roller bearing.

[0015] Furthermore, the inner cavity of the first spherical roller bearing is filled with white oil.

[0016] Furthermore, the pressure value of the white oil is equal to the pressure value of the external dichloromethane.

[0017] Furthermore, the inner cavity of the second spherical roller bearing is filled with white oil.

[0018] Furthermore, the pressure value of the white oil is equal to the pressure value of the external dichloromethane.

[0019] Furthermore, the first sealing member and / or the second sealing member is an oil seal.

[0020] Furthermore, the third sealing component is an oil seal.

[0021] (3) Beneficial effects

[0022] In summary, the present invention can withstand not only radial loads but also bidirectional axial loads by adopting spherical roller bearings, and the bearings have automatic aligning performance, which facilitates the installation of the shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 This is a structural schematic diagram of a roller bearing structure for use in wet-process lithium battery diaphragm extraction liquid provided by an embodiment of the present utility model;

[0025] Figure 2 This is a schematic structural diagram of a drive-side bearing structure in a roller bearing structure for use in wet-process lithium battery diaphragm extraction liquid provided by an embodiment of the present utility model;

[0026] Figure 3 This is a schematic diagram of the working principle of a drive side bearing structure provided by an embodiment of the utility model;

[0027] Figure 4 This is a schematic structural diagram of a passive side bearing structure in a roller bearing structure for use in wet-process lithium battery diaphragm extraction liquid provided by an embodiment of the present utility model;

[0028] Figure 5 This is a schematic diagram of the working principle of a passive side bearing structure provided by an embodiment of the present utility model.

[0029] In the picture:

[0030] 100-driving side bearing structure; 1-driving side bearing base; 2-driving side bearing cover plate; 3-first spherical roller bearing; 4-circlip for the first hole; 5-gasket; 6-first seal; 7-driving side sealing cover plate; 8-second seal; 9-first inner sealing cover plate; 10-driving shaft head; 200-connecting shaft; 300-passive side bearing structure; 11-passive side bearing base; 12-passive side bearing cover plate; 13-second spherical roller bearing; 14-circlip for the second hole; 15-third seal; 16-second inner sealing cover plate; 17-passive side sealing cover plate; 400-exhaust pipe; 500-oil filling pipe; 600-white oil storage tank; 700-compressed air. DETAILED DESCRIPTION

[0031] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The detailed description of the following examples and the accompanying drawings are intended to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention. That is, the present invention is not limited to the described embodiments and covers any modifications, replacements, and improvements to the parts, components, and connection methods without departing from the spirit of the present invention.

[0032] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the present invention are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the equipment or components referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0034] It should also be noted that, in the description of this utility model, unless otherwise specified or limited, the terms "disposed" and "installed" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0035] Figure 1 This is a schematic diagram of a roller bearing structure for wet-process lithium battery diaphragm extraction provided by an embodiment of the present invention, see Figure 1The bearing structure may include a driving side bearing structure 100, a connecting shaft 200 and a passive side bearing structure 300. The two ends of the connecting shaft 200 are respectively connected to the driving side bearing structure 100 and the passive side bearing structure 300. The driving side bearing structure 100 drives the passive side bearing structure 300 to rotate.

[0036] See also Figure 2 The driving side bearing structure 100 includes a driving side bearing base 1, a driving side bearing cover plate 2, a first spherical roller bearing 3, a first hole retaining spring 4, a driving side sealing cover plate 7, a first inner sealing cover plate 9 and a driving shaft head 10. The first spherical roller bearing 3 sleeved on the connecting shaft 200 is located in the installation space formed by the driving side bearing base 1 and the driving side bearing pressure cover 2 being fastened together. The first hole retaining spring 4 is sleeved on the connecting shaft 200 and is used to limit the axial movement of the first spherical roller bearing 3. The driving side sealing pressure cover 7 and the first inner sealing pressure cover 9 are respectively pressed on the opposite sides of the fastened driving side bearing base 1 and the driving side bearing pressure cover 2; the driving shaft head 10 is connected to the connecting shaft 200 and is used to drive the connecting shaft 200 to rotate.

[0037] See also Figure 4 The passive side bearing structure 300 includes a passive side bearing base 11, a passive side bearing cover plate 12, a second spherical roller bearing 13, a second hole retaining spring 14, a second inner sealing cover plate 16 and a passive side sealing cover plate 17. The passive side bearing base 11 and the passive side bearing pressure cover 12 are snap-fitted and connected to install the second spherical roller bearing 13 sleeved on the connecting shaft 200. The second hole retaining spring 14 is sleeved on the connecting shaft 200 and is used to limit the axial movement of the second spherical roller bearing 13. The passive side sealing cover 17 and the second inner sealing cover 16 are respectively pressed on the opposite sides of the snapped passive side bearing base 11 and the passive side bearing cover plate 12.

[0038] In the above embodiment, if Figure 3 As shown, during operation, the internal cavity of the driving side bearing structure 100 is sealed, and white oil is injected from the white oil storage tank 600 outside the box through the oil filling pipe 500 to the oil filling hole on the driving side bearing base 1. The connecting pipe of the driving side bearing gland 2 is connected to observe the gas discharge until the bearing cavity is filled with white oil. The exhaust pipe 400 of the driving side bearing gland 2 is tightened, and compressed air 700 is used to pressurize the white oil storage tank 600. The white oil inside the bearing cavity is pressurized to the same value as the dichloromethane pressure outside the bearing, so that the internal and external pressures are balanced and the dichloromethane is isolated on the outside of the bearing seat. Figure 5As shown, during operation, the passive side sealing cover 17 of the bearing internal cavity of the passive side bearing structure 300 is sealed, and white oil is injected from the white oil storage tank 600 outside the box to the oil filling hole below the passive side sealing cover 17 through the oil filling pipe 500. The connecting pipe above the passive side sealing cover 17 is connected to observe the gas discharge until the bearing cavity is filled with white oil, and the exhaust pipe 400 of the passive side sealing cover 17 is tightened. The white oil storage tank is pressurized with compressed air 700, so that the white oil in the bearing cavity is pressurized through the connecting pipe below the passive side sealing cover 17 to the box cavity, and is pressurized to the same value as the dichloromethane pressure outside the bearing, so that the internal and external pressures are balanced and the dichloromethane is isolated on the outside of the bearing seat.

[0039] As an optional implementation, Figure 2 As shown, the drive-side bearing structure 100 further includes a first seal 6 and a second seal 8. The first seal 6 and the second seal 8 are respectively disposed on opposite sides of the first spherical roller bearing 3 and are used to seal the inner cavity of the first spherical roller bearing 3. Furthermore, the first seal 6 and / or the second seal 8 are oil seals.

[0040] As an optional implementation, Figure 2 As shown, the driving side bearing structure 100 further includes a backing ring 5 , and the first seal 6 and / or the second seal 8 are sleeved on the connecting shaft 200 through the corresponding backing ring 5 .

[0041] As an optional implementation, Figure 3 As shown, the passive side bearing structure 300 further includes a third seal 15, which is disposed on a side of the second spherical roller bearing 13 facing the first spherical roller bearing 3. Furthermore, the third seal 15 is an oil seal.

[0042] As an optional embodiment, the inner cavity of the first spherical roller bearing 3 is filled with white oil, and the inner cavity of the second spherical roller bearing 13 is filled with white oil. Specifically, the use of white oil for lubrication allows the white oil and dichloromethane to be dissolved and then recovered and reused in the liquid phase, reducing operating costs and facilitating maintenance operations.

[0043] It should be noted that the various embodiments in this specification are described in a progressive manner. References to the same or similar parts between the various embodiments are sufficient. Each embodiment focuses on the differences from the other embodiments. The present invention is not limited to the specific steps and structures described above and shown in the figures. Furthermore, for the sake of brevity, detailed descriptions of known methods and techniques are omitted here.

[0044] The above are merely examples of the present application and are not intended to limit the present application. Various modifications and variations are possible for those skilled in the art without departing from the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included within the scope of the claims of the present application.

Claims

1. A roller bearing structure for wet-process lithium battery diaphragm extract, characterized in that: It comprises a driving side bearing structure (100), a connecting shaft (200) and a passive side bearing structure (300), wherein both ends of the connecting shaft (200) are respectively connected to the driving side bearing structure (100) and the passive side bearing structure (300), and the driving side bearing structure (100) drives the passive side bearing structure (300) to rotate; wherein, The driving side bearing structure (100) comprises a driving side bearing base (1), a driving side bearing cover plate (2), a first spherical roller bearing (3), a first hole retaining spring (4), a driving side sealing cover plate (7), a first inner sealing cover plate (9) and a driving shaft head (10); the first spherical roller bearing (3) sleeved on the connecting shaft (200) is located in an installation space formed by the driving side bearing base (1) and the driving side bearing cover plate (2) being fastened together; the first hole retaining spring (4) is sleeved on the connecting shaft (200) and is used to limit the axial movement of the first spherical roller bearing (3); the driving side sealing cover plate (7) and the first inner sealing cover plate (9) are respectively pressed on opposite sides of the fastened driving side bearing base (1) and the driving side bearing cover plate (2); the driving shaft head (10) is connected to the connecting shaft (200) and is used to drive the connecting shaft (200) to rotate; The passive side bearing structure (300) comprises a passive side bearing base (11), a passive side bearing cover plate (12), a second spherical roller bearing (13), a second hole retaining spring (14), a second inner sealing cover plate (16) and a passive side sealing cover plate (17); the passive side bearing base (11) and the passive side bearing cover plate (12) are snap-fitted and connected to install the second spherical roller bearing (13) sleeved on the connecting shaft (200); the second hole retaining spring (14) is sleeved on the connecting shaft (200) and is used to limit the axial movement of the second spherical roller bearing (13); the passive side sealing cover plate (17) and the second inner sealing cover plate (16) are respectively pressed on opposite sides of the snap-fitted passive side bearing base (11) and the passive side bearing cover plate (12).

2. The roller bearing structure for wet-process lithium battery diaphragm extraction according to claim 1, characterized in that: The driving side bearing structure (100) further comprises a first seal (6) and a second seal (8), wherein the first seal (6) and the second seal (8) are respectively arranged on opposite sides of the first spherical roller bearing (3) and are used to seal the inner cavity of the first spherical roller bearing (3).

3. The roller bearing structure for wet-process lithium battery diaphragm extract according to claim 2, characterized in that: The driving side bearing structure (100) further comprises a backing ring (5), and the first sealing member (6) and / or the second sealing member (8) are sleeved on the connecting shaft (200) via the corresponding backing ring (5).

4. The roller bearing structure for wet-process lithium battery diaphragm extraction according to claim 1, characterized in that: The passive side bearing structure (300) further comprises a third sealing member (15), wherein the third sealing member (15) is arranged in close contact with the side of the second spherical roller bearing (13) facing the first spherical roller bearing (3).

5. The roller bearing structure for wet-process lithium battery diaphragm extraction according to claim 1, characterized in that: The inner cavity of the first spherical roller bearing (3) is filled with white oil.

6. The roller bearing structure for wet-process lithium battery diaphragm extraction according to claim 5, characterized in that: The pressure value of the white oil is equal to the pressure value of the external dichloromethane.

7. The roller bearing structure for wet-process lithium battery diaphragm extraction according to claim 1, characterized in that: The inner cavity of the second spherical roller bearing (13) is filled with white oil.

8. The roller bearing structure for wet-process lithium battery separator extraction according to claim 7, characterized in that: The pressure value of the white oil is equal to the pressure value of the external dichloromethane.

9. The roller bearing structure for wet-process lithium battery diaphragm extraction according to claim 2, characterized in that: The first sealing member (6) and / or the second sealing member (8) is an oil seal.

10. The roller bearing structure for wet-process lithium battery diaphragm extraction according to claim 4, characterized in that: The third sealing member (15) is an oil seal.

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