A stirring seal structure

Abstract

This invention relates to a stirring and sealing structure. The invention includes a housing; a drive shaft disposed within the housing, forming a bearing cavity between the drive shaft and the housing; a first wear-resistant sleeve and a second wear-resistant sleeve that rotate with the drive shaft, the first wear-resistant sleeve being located on one axial side of the second wear-resistant sleeve and close to the bearing cavity; an oil seal seat, which sequentially forms a first sealing cavity and a spiral channel in the axial direction away from the bearing cavity with the first wear-resistant sleeve; and a dust cover, which sequentially forms a buffer sealing cavity and a second sealing cavity in the axial direction away from the spiral channel with the second wear-resistant sleeve and the first wear-resistant sleeve. The spiral channel, buffer sealing cavity, and second sealing cavity are sequentially connected. When the second sealing cavity fails to seal, the slurry enters the buffer sealing cavity through the second sealing cavity and rises to the spiral channel. The rotation of the drive shaft causes the slurry in the spiral channel to move towards the buffer sealing cavity and be squeezed out from the second sealing cavity, effectively preventing the slurry from entering the bearing and causing bearing jamming.

Description

Technical Field

[0001] This invention relates to the field of mixing equipment technology, and in particular to a mixing sealing structure. Background Technology

[0002] Compared to the battery industry, the slurry in the ceramics industry is thinner, but has a higher content of solid particles. During high-speed dispersion, traditional sealing structures cannot effectively prevent the slurry from corroding the bearings. Therefore, the requirements for bearings are higher, the maintenance cycle is shorter, and the cost is higher, while the stirring efficiency is also lower. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the problems of the existing technology, which use traditional sealing structures that cannot effectively prevent the slurry from corroding the bearings, as well as the high requirements for bearings, short maintenance cycles, high costs and low stirring efficiency.

[0004] To solve the above-mentioned technical problems, the present invention provides a stirring and sealing structure, comprising:

[0005] case;

[0006] A drive shaft is disposed within the housing, and a bearing cavity is formed between the drive shaft and the housing;

[0007] A first wear-resistant sleeve and a second wear-resistant sleeve are respectively sleeved on and rotate with the drive shaft, wherein the first wear-resistant sleeve is located on the axial side of the second wear-resistant sleeve and close to the bearing cavity;

[0008] An oil seal seat connected to the housing, wherein the oil seal seat and the first wear-resistant sleeve sequentially form a first sealing cavity and a spiral channel in the axial direction away from the bearing cavity;

[0009] A dust cover connected to the housing and located outside the oil seal seat, wherein the dust cover, the second wear-resistant sleeve and the first wear-resistant sleeve sequentially form a buffer sealing cavity and a second sealing cavity in the axial direction away from the spiral channel, and the spiral channel, the buffer sealing cavity and the second sealing cavity are sequentially connected;

[0010] When the second sealing cavity fails to seal, the slurry enters the buffer sealing cavity through the second sealing cavity and rises to the spiral channel. The rotation of the drive shaft can drive the slurry in the spiral channel to move towards the buffer sealing cavity and be squeezed out from the second sealing cavity.

[0011] In one embodiment of the present invention, helical teeth are axially distributed along the outer wall of the first wear-resistant sleeve, and the helical teeth and the inner wall of the oil seal seat form the helical channel.

[0012] In one embodiment of the present invention, the gap between the outer wall of the helical teeth and the inner wall of the oil seal seat is 1-2 mm.

[0013] In one embodiment of the present invention, the helical teeth are right-handed, the pitch is 1-2 mm, the helix angle is 10-20°, and the drive shaft rotates clockwise.

[0014] In one embodiment of the present invention, at least three first oil seals are provided in the first sealing cavity.

[0015] In one embodiment of the present invention, at least two second oil seals are provided in the second sealing cavity.

[0016] In one embodiment of the present invention, at least two first sealing rings are provided between the first wear-resistant sleeve and the drive shaft.

[0017] In one embodiment of the present invention, at least two second sealing rings are provided between the second wear-resistant sleeve and the drive shaft.

[0018] In one embodiment of the present invention, the oil seal seat includes a body, a mounting flange extending radially from the outer wall of the body, a baffle extending radially from the inner wall of the body between the spiral channel and the first sealing cavity, a third sealing ring provided between the inner wall of the body near the mounting flange extending into the bearing cavity and sealingly connected to the bearing cavity, and the mounting flange being connected to the axial end of the housing.

[0019] In one embodiment of the present invention, the mounting flange is further connected to an annular pressure plate, the annular pressure plate is pressed against and a fourth sealing ring is provided between it and one axial end of the dust cover, and the annular pressure plate, the mounting flange and one axial end of the housing are connected by bolts.

[0020] The technical solution of the present invention has the following advantages over the prior art:

[0021] The present invention discloses a stirring and sealing structure. By setting a buffer sealing cavity and a spiral channel in the lower part of the bearing cavity, when the drive shaft rotates at high speed and the seal between the dust cover and the first wear-resistant sleeve fails, the slurry will first enter the buffer sealing cavity. This area can effectively prevent the slurry from continuing to rise. When the slurry in the buffer area accumulates to a certain extent, it will then enter the spiral channel between the oil seal seat and the second wear-resistant sleeve. Since the spiral direction of the spiral channel is the same as the rotation direction of the high-speed shaft, due to inertia, the slurry will move along the spiral channel and be thrown out from the second sealing cavity, thereby preventing the slurry from continuing to climb and strengthening the seal. This effectively avoids the problem of the bearing seizing due to the slurry entering the bearing. Verification has shown that this significantly improves the maintenance cycle of the equipment and increases the stirring efficiency. Attached Figure Description

[0022] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0023] Figure 1 This is a schematic cross-sectional view of the stirring and sealing structure of the present invention.

[0024] Figure 2 This is a schematic diagram of the overall structure of the stirring and sealing structure of the present invention.

[0025] Figure 3 This is a schematic diagram of the oil seal seat structure of the present invention.

[0026] Figure 4 This is a schematic diagram of the annular pressure plate structure of the present invention.

[0027] Explanation of reference numerals in the instruction manual:

[0028] 1. Housing; 11. Bearing cavity; 12. First sealing cavity; 13. Helical channel; 14. Buffer sealing cavity; 15. Second sealing cavity;

[0029] 2. Drive shaft;

[0030] 3. First wear-resistant sleeve; 31. Helical teeth;

[0031] 4. Second wear-resistant sleeve;

[0032] 5. Oil seal seat; 51. Body; 52. Mounting flange; 53. Baffle;

[0033] 6. Dust cover;

[0034] 7. Annular pressure plate;

[0035] 81. First oil seal; 82. Second oil seal;

[0036] 91. First sealing ring; 92. Second sealing ring; 93. Third sealing ring; 94. Fourth sealing ring. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0038] In this invention, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this invention, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0039] In this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc., are understood to exclude the stated number; "above," "below," "within," etc., are understood to include the stated number. In the description of this invention, the terms "first" and "second" are used only to distinguish technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0040] In this invention, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this invention based on the specific content of the technical solution.

[0041] Reference Figures 1 to 4 As shown, a stirring and sealing structure of the present invention includes:

[0042] Casing 1;

[0043] A drive shaft 2 is disposed inside the housing 1, and a bearing cavity 11 is formed between the drive shaft 2 and the housing 1;

[0044] A first wear-resistant sleeve 3 and a second wear-resistant sleeve 4 are respectively sleeved on and rotate with the drive shaft 2. The first wear-resistant sleeve 3 is located on the axial side of the second wear-resistant sleeve 4 and is close to the bearing cavity 11.

[0045] The oil seal seat 5 is connected to the housing 1. The oil seal seat 5 and the first wear-resistant sleeve 3 form a first sealing cavity 12 and a spiral channel 13 in sequence in the axial direction away from the bearing cavity 11.

[0046] A dust cover 6 is connected to the housing 1 and located outside the oil seal seat 5. The dust cover 6, the second wear-resistant sleeve 4, and the first wear-resistant sleeve 3 form a buffer sealing cavity 14 and a second sealing cavity 15 in the axial direction away from the spiral channel 13. The spiral channel 13, the buffer sealing cavity 14, and the second sealing cavity 15 are connected in sequence.

[0047] When the second sealing cavity 15 fails to seal, the slurry enters the buffer sealing cavity 14 through the second sealing cavity 15 and rises to the spiral channel 13. The rotation of the drive shaft 2 can drive the slurry in the spiral channel 13 to move towards the buffer sealing cavity 14 and be squeezed out from the second sealing cavity 15.

[0048] Specifically, spiral teeth 31 are axially distributed along the outer wall of the first wear-resistant sleeve 3, and the spiral teeth 31 and the inner wall of the oil seal seat 5 form the spiral channel 13.

[0049] In this embodiment, the gap between the outer wall of the helical tooth 31 and the inner wall of the oil seal seat 5 is 1-2 mm. The helix direction of the helical tooth 31 is right-handed, the pitch is 1-2 mm, and the helix angle is 10-20°. The rotation direction of the drive shaft 2 is clockwise. Both the helix direction of the helical tooth 31 and the rotation direction of the drive shaft 2 are viewed from the drive end of the drive shaft 2. Verification shows that the above parameter settings have a good effect on the conveying of slurry in the ceramic industry via the helical channel 13.

[0050] In this embodiment, the first wear-resistant sleeve 3 and the second wear-resistant sleeve 4 are copper sleeves.

[0051] Specifically, the first sealing cavity 12 is provided with at least three first oil seals 81, the second sealing cavity 15 is provided with at least two second oil seals 82, the first wear-resistant sleeve 3 and the drive shaft 2 are provided with at least two first sealing rings 91, and the second wear-resistant sleeve 4 and the drive shaft 2 are provided with at least two second sealing rings 92. Through multi-layer sealing, the service life of the bearing in the bearing cavity 11 is effectively protected and extended. The aforementioned first oil seals 81 and second oil seals 82 are both ordinary skeleton oil seals.

[0052] Specifically, the oil seal seat 5 includes a body 51, with a mounting flange 52 extending radially from the outer wall of the body 51, and a baffle 53 extending radially from the inner wall of the body 51 between the spiral channel 13 and the first sealing cavity 12. A third sealing ring 93 is provided between the axial end of the body 51 near the mounting flange 52 extending into the bearing cavity 11 and sealingly connected to the bearing cavity 11. The mounting flange 52 is connected to the axial end of the housing 1.

[0053] Specifically, the mounting flange 52 is also connected to an annular pressure plate 7. The annular pressure plate 7 is pressed against and has a fourth sealing ring 94 between it and one axial end of the dust cover 6. The annular pressure plate 7, the mounting flange 52, and one axial end of the housing 1 are connected by bolts.

[0054] The first sealing ring 91, the second sealing ring 92, the third sealing ring 93 and the fourth sealing ring 94 mentioned above are all O-rings.

[0055] This invention can be used in conjunction with a mixing device. By setting up a buffer sealing cavity 14 and a spiral channel 13, when the drive shaft 2 rotates at high speed and the seal between the dust cover 6 and the first wear-resistant sleeve 3 fails, the slurry will first enter the buffer sealing cavity 14. This area can effectively alleviate the slurry from continuing to rise. When the slurry in the buffer area accumulates to a certain extent, it will then enter the spiral channel 13 between the oil seal seat 5 and the second wear-resistant sleeve 4. Since the spiral direction of the spiral channel 13 is the same as the rotation direction of the high-speed shaft, due to inertia, the slurry will move along the spiral channel 13 and be thrown out from the second sealing cavity 15, thereby preventing the slurry from continuing to climb and strengthening the seal.

[0056] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A stirring and sealing structure, characterized in that, include: Shell (1); A drive shaft (2) is provided inside the housing (1), and a bearing cavity (11) is formed between the drive shaft (2) and the housing (1). A first wear-resistant sleeve (3) and a second wear-resistant sleeve (4) are respectively sleeved on and rotate with the drive shaft (2). The first wear-resistant sleeve (3) is located on the axial side of the second wear-resistant sleeve (4) and close to the bearing cavity (11). The oil seal seat (5) connected to the housing (1) and the first wear-resistant sleeve (3) form a first sealing cavity (12) and a spiral channel (13) in sequence in the axial direction away from the bearing cavity (11). A dust cover (6) is connected to the housing (1) and located outside the oil seal seat (5). The dust cover (6) and the second wear-resistant sleeve (4) and the first wear-resistant sleeve (3) sequentially form a buffer sealing cavity (14) and a second sealing cavity (15) in the axial direction away from the spiral channel (13). The spiral channel (13), the buffer sealing cavity (14) and the second sealing cavity (15) are sequentially connected. When the second sealing cavity (15) fails to seal, the slurry enters the buffer sealing cavity (14) through the second sealing cavity (15) and rises to the spiral channel (13). The rotation of the drive shaft (2) can drive the slurry in the spiral channel (13) to move towards the buffer sealing cavity (14) and be squeezed out from the second sealing cavity (15). Spiral teeth (31) are distributed axially along the outer wall of the first wear-resistant sleeve (3), and the spiral teeth (31) and the inner wall of the oil seal seat (5) form the spiral channel (13).

2. The stirring and sealing structure according to claim 1, characterized in that, The gap between the outer wall of the spiral tooth (31) and the inner wall of the oil seal seat (5) is 1-2 mm.

3. The stirring and sealing structure according to claim 1, characterized in that, The spiral teeth (31) are right-handed, with a pitch of 1-2 mm and a helix angle of 10-20°. The drive shaft (2) rotates clockwise.

4. The stirring and sealing structure according to claim 1, characterized in that, The first sealing cavity (12) is provided with at least three first oil seals (81).

5. The stirring and sealing structure according to claim 1, characterized in that, The second sealing cavity (15) is provided with at least two second oil seals (82).

6. The stirring and sealing structure according to claim 1, characterized in that, At least two first sealing rings (91) are provided between the first wear-resistant sleeve (3) and the drive shaft (2).

7. The stirring and sealing structure according to claim 1, characterized in that, At least two second sealing rings (92) are provided between the second wear-resistant sleeve (4) and the drive shaft (2).

8. The stirring and sealing structure according to claim 1, characterized in that, The oil seal seat (5) includes a body (51), with a mounting flange (52) extending radially from the outer wall of the body (51), and a baffle (53) extending radially from the inner wall of the body (51) between the spiral channel (13) and the first sealing cavity (12). A third sealing ring (93) is provided between the inner wall of the body (51) near the mounting flange (52) and the bearing cavity (11), and the mounting flange (52) is connected to the axial end of the housing (1).

9. The stirring and sealing structure according to claim 8, characterized in that, The mounting flange (52) is also connected to an annular pressure plate (7), which is pressed against and has a fourth sealing ring (94) between it and one axial end of the dust cover (6). The annular pressure plate (7), the mounting flange (52), and one axial end of the housing (1) are connected by bolts.

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