Structure for preventing liquid from permeating into bearing

Abstract

The utility model relates to a structure for preventing liquid from seeping into a bearing. The structure comprises a supporting piece, a width rotating on the supporting piece, a roller body rotating on the width, the bearing for supporting the roller body, a first sealing piece for sealing the bearing and a second sealing piece for sealing the bearing, a first groove is formed in the supporting piece; the bearing is positioned in the first groove; an oil injection hole is formed in the supporting piece; the oil injection hole corresponds to the first groove; the first sealing piece is arranged on the supporting piece; the second sealing piece is arranged on the roller body; a second groove is formed in the bottom of the supporting piece; the second groove corresponds to the first groove, and an oil return hole facilitating oil drainage is formed in the bottom of the second groove. The problems that lubricating oil is needed for lubrication during rotation of an existing roller body, liquid flows into a bearing during dehydration on the outer side, the oil in the bearing is mixed with water, and meanwhile, friction is too large and dynamic balance of the roller body is affected if a sealing strip is adopted are solved.

Description

Technical Field

[0001] This utility model relates to the field of vacuum rollers, and in particular to a structure for preventing liquid from seeping into a bearing. Background Technology

[0002] In the existing technology, after the pulp is uniformly treated in the papermaking process, due to the large amount of water in the pulp, it is necessary to press out the water during the paper forming process. Vacuum rolls are commonly used dewatering components on papermaking machines, which play a decisive role in paper forming, dewatering, and the speed of the paper machine. They also play a key role in the physical properties, optical properties, and printability of the paper. However, the current rolls require lubricating oil for lubrication when rotating. During dewatering on the outside, liquid will flow into the bearing, causing the oil and water in the bearing to mix. At the same time, if a sealing strip is used, it will lead to excessive friction and affect the dynamic balance of the roll. Utility Model Content

[0003] This application provides a structure to prevent liquid from seeping into the bearing, which solves the problem in the prior art where the roller body needs lubricating oil for lubrication during rotation, and the liquid will flow into the bearing when the outer side is dehydrated, causing the oil and water in the bearing to mix. At the same time, if a sealing strip is used, it will cause excessive friction and affect the dynamic balance of the roller body.

[0004] The technical solutions adopted in the embodiments of this application are as follows.

[0005] A structure for preventing liquid from seeping into a bearing includes a support member, a span rotating on the support member, a roller rotating on the span, a bearing supporting the roller, a first seal for sealing the bearing, and a second seal for sealing the bearing. The support member has a first groove; the bearing is located within the first groove; the support member has an oil injection hole corresponding to the first groove; the first seal is disposed on the support member; the second seal is disposed on the roller; the bottom of the support member has a second groove corresponding to the first groove, and the bottom of the second groove has a return oil hole for easy oil drainage.

[0006] As a further improvement to the above technical solution: the first sealing element includes a first block, a second block disposed on the first block, and a third block disposed on the first block; a third groove is formed on the second sealing element; the second block is located in the third groove; a gap is left between the third groove and the second block; one end of the second sealing element is inserted between the second block and the third block, and the other end of the second sealing element is located outside the second block; a gap is left between the first sealing element and the second sealing element; a reflux hole is formed at the bottom of the third block.

[0007] As a further improvement to the above technical solution: both the inner and outer walls of the second block are provided with flow-limiting grooves.

[0008] As a further improvement to the above technical solution: the second seal is provided with a protrusion to initially prevent liquid from flowing into the first seal; the protrusion is triangular in shape.

[0009] As a further improvement to the above technical solution: both the first sealing element and the second sealing element are fixed by bolts.

[0010] As a further improvement to the above technical solution: the gap between the first seal and the second seal is 1.5mm.

[0011] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0012] 1. The system employs a first sealing element (static seal): composed of a first piece, a second piece (with a return hole and a flow-limiting groove), and a third piece, fixed to the support component with bolts to form a static sealing barrier; a second sealing element (dynamic seal): installed on the rotating roller, featuring a triangular protrusion and a third groove, dynamically engaging with the first sealing element, utilizing a 1.5mm gap to reduce frictional resistance; and a labyrinth-type gap seal: the two sealing elements form multiple meandering paths through a non-contact gap (including protrusion and groove structures), increasing liquid penetration resistance while avoiding dynamic balance issues caused by direct friction of the sealing strips; when discharging liquids and oils: the inner and outer flow-limiting grooves of the second piece guide the liquid flow, cooperating with the return hole to direct the seeping liquid to the second groove, and finally discharging it through the oil return hole, preventing liquid accumulation; the triangular protrusion initially blocks the liquid and uses its sharp corners to divert the flow, reducing the liquid impact force and the amount of liquid entering the sealing gap; the sealing elements are fixed with bolts, facilitating disassembly and maintenance and reducing downtime; the 1.5mm gap balances sealing performance and frictional loss, ensuring stability during high-speed rotation of the roller. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure for preventing liquid from seeping into the bearing in this utility model.

[0014] Figure 2 for Figure 1 A magnified view of part A in the image.

[0015] Figure 3 for Figure 1 A magnified view of part B in the image.

[0016] In the diagram: 1. Support component; 11. First groove; 12. Oil injection hole; 13. Second groove; 14. Oil return hole; 2. Width; 3. Roller body; 4. Bearing; 5. First seal; 51. First block; 52. Second block; 522. Flow limiting groove; 53. Third block; 531. Return hole; 6. Second seal; 61. Third groove; 62. Protrusion. Detailed Implementation

[0017] This application provides a structure to prevent liquid from seeping into the bearing, which solves the problem in the prior art where the roller body needs lubricating oil for lubrication during rotation, and the liquid will flow into the bearing when the outer side is dehydrated, causing the oil and water in the bearing to mix. At the same time, if a sealing strip is used, it will cause excessive friction and affect the dynamic balance of the roller body.

[0018] The technical solution in this application embodiment is to solve the above problems, and the overall idea is as follows:

[0019] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0020] A structure for preventing liquid from seeping into a bearing includes a support member 1, a span 2 rotating on the support member 1, a roller body 3 rotating on the span 2, a bearing 4 supporting the roller body 3, a first seal 5 sealing the bearing 4, and a second seal 6 sealing the bearing 4. A first groove 11 is formed in the support member 1; the bearing 4 is located in the first groove 11; an oil injection hole 12 is formed on the support member 1; the oil injection hole 12 corresponds to the first groove 11; the first seal 5 is provided on the support member 1; the second seal 6 is provided on the roller body 3; a second groove 13 is formed at the bottom of the support member 1; the second groove 13 corresponds to the first groove 11, and an oil return hole 14 for easy oil drainage is formed at the bottom of the second groove 13.

[0021] The first sealing element 5 includes a first block 51, a second block 52 disposed on the first block 51, and a third block 53 disposed on the first block 51; the second sealing element 6 has a third groove 61; the second block 52 is located in the third groove 61; a gap is left between the third groove 61 and the second block 52; one end of the second sealing element 6 is inserted between the second block 52 and the third block 53, and the other end of the second sealing element 6 is located outside the second block 52; a gap is left between the first sealing element 5 and the second sealing element 6; a reflux hole 531 is opened at the bottom of the third block 53.

[0022] The inner and outer walls of the second piece 52 are both provided with flow channels 522.

[0023] The second seal 6 is provided with a protrusion 62 to initially prevent liquid from flowing into the first seal 5; the protrusion 62 is triangular in shape.

[0024] Both the first seal 5 and the second seal 6 are fixed by bolts.

[0025] The gap between the first seal 5 and the second seal 6 is 1.5 mm.

[0026] The first sealing element 5 (static seal): consists of a first piece 51, a second piece 52 (with a return hole 521 and a flow-limiting groove 522), and a third piece 53, which are fixed to the support 1 by bolts to form a static sealing barrier; the second sealing element 6 (dynamic seal): installed on the rotating roller 3, with a triangular protrusion 62 and a third groove 61, forming a dynamic fit with the first sealing element 5, using a gap (1.5mm) to reduce frictional resistance; secondly, a labyrinth-type gap seal: the two sealing elements form multiple meandering paths through a non-contact gap (including the protrusion 62 and the groove structure), increasing the resistance to liquid penetration. Meanwhile, it avoids dynamic balance problems caused by direct friction of the sealing strip; when discharging liquid and oil: the inner and outer flow-limiting grooves 522 of the second block 52 guide the liquid flow, and in conjunction with the return hole 521, guide the seepage liquid to the second groove 13, and finally discharge it through the oil return hole 14 to prevent liquid accumulation; the triangular protrusion 62 initially blocks the liquid and uses the sharp corner to divert the flow, reducing the liquid impact force and reducing the amount of liquid entering the sealing gap; the seal is fixed by bolts, which is convenient for disassembly and maintenance and reduces downtime; the 1.5mm gap balances the sealing performance and friction loss, ensuring the stability of the roller 3 when rotating at high speed.

[0027] The system employs a first sealing element 5 (static seal): composed of a first block 51, a second block 52 (with a return hole 521 and a flow-limiting groove 522), and a third block 53, which are bolted to the support element 1 to form a static sealing barrier; a second sealing element 6 (dynamic seal): installed on the rotating roller body 3, featuring a triangular protrusion 62 and a third groove 61, which dynamically engages with the first sealing element 5, utilizing a gap (1.5mm) to reduce frictional resistance; and a labyrinth-type gap seal: the two sealing elements form multiple meandering paths through a non-contact gap (including the protrusion 62 and groove structure), increasing liquid penetration. Resistance is reduced, and dynamic balance issues caused by direct friction of the sealing strip are avoided. When discharging liquids and oils: the inner and outer flow-limiting grooves 522 of the second block 52 guide the liquid flow, and in conjunction with the return hole 521, guide the seepage liquid to the second groove 13, and finally discharge it through the oil return hole 14 to prevent liquid accumulation; the triangular protrusion 62 initially blocks the liquid and uses the sharp corner to divert the flow, reducing the liquid impact force and reducing the amount of liquid entering the sealing gap; the seal is fixed by bolts, which is convenient for disassembly and maintenance and reduces downtime; the 1.5mm gap balances the sealing performance and friction loss, ensuring the stability of the roller 3 when rotating at high speed.

[0028] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0029] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A structure for preventing liquid from seeping into a bearing, characterized in that, The device includes a support member (1), a span (2) rotating on the support member (1), a roller (3) rotating on the span (2), a bearing (4) supporting the roller (3), a first seal (5) sealing the bearing (4), and a second seal (6) sealing the bearing (4); a first groove (11) is provided in the support member (1); the bearing (4) is located in the first groove (11); an oil injection hole (12) is provided on the support member (1); the oil injection hole (12) corresponds to the first groove (11); the first seal (5) is provided on the support member (1); the second seal (6) is provided on the roller (3); a second groove (13) is provided at the bottom of the support member (1); the second groove (13) corresponds to the first groove (11), and an oil return hole (14) is provided at the bottom of the second groove (13) to facilitate oil drainage.

2. The structure for preventing liquid from seeping into the bearing as described in claim 1, characterized in that, The first sealing element (5) includes a first block (51), a second block (52) disposed on the first block (51), and a third block (53) disposed on the first block (51); the second sealing element (6) has a third groove (61); the second block (52) is located in the third groove (61); there is a gap between the third groove (61) and the second block (52); one end of the second sealing element (6) is inserted between the second block (52) and the third block (53), and the other end of the second sealing element (6) is located outside the second block (52); there is a gap between the first sealing element (5) and the second sealing element (6); a reflux hole (521) is provided at the bottom of the third block (53).

3. The structure for preventing liquid from seeping into the bearing as described in claim 2, characterized in that, The second block (52) has flow channels (522) on both its inner and outer walls.

4. The structure for preventing liquid from seeping into the bearing as described in claim 1, characterized in that, The second seal (6) is provided with a protrusion (62) to initially prevent liquid from flowing into the first seal (5); the protrusion (62) is triangular in shape.

5. The structure for preventing liquid from seeping into the bearing as described in claim 1, characterized in that, Both the first seal (5) and the second seal (6) are fixed by bolts.

6. The structure for preventing liquid from seeping into the bearing as described in claim 1, characterized in that, The gap between the first seal (5) and the second seal (6) is 1.5 mm.

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