CN210978522U - Sealing device for cooling roller and water collecting cavity - Google Patents
Sealing device for cooling roller and water collecting cavity Download PDFInfo
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- CN210978522U CN210978522U CN201922077058.7U CN201922077058U CN210978522U CN 210978522 U CN210978522 U CN 210978522U CN 201922077058 U CN201922077058 U CN 201922077058U CN 210978522 U CN210978522 U CN 210978522U
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Abstract
The utility model belongs to the technical field of printing equipment, in particular to a sealing device for a cooling roller and a water collecting cavity, which comprises a first sealing element, wherein the first sealing element consists of a static ring and a dynamic ring, and the static ring and the dynamic ring are both sleeved outside the cooling roller; the first end of the static ring is fixedly connected with the outer wall of the water collecting cavity, and the second end of the static ring is close to the dynamic ring; the inner side surface of the movable ring is fixedly connected with the outer wall of the cooling roller, and the movable ring is in rotating fit with the static ring; the static ring is provided with an air inlet channel along the diameter direction of the cooling roller; the air inlet of the air inlet channel is positioned on the outer side surface of the static ring, and the air outlet is positioned on the inner side surface of the static ring; a clearance between the movable ring and the static ring forms a labyrinth passage, and the labyrinth passage is communicated with the air inlet passage so that the labyrinth passage is filled with air; the inner side surface of the movable ring is provided with a groove, and a second sealing piece fixedly connected with the outer wall of the cooling roller is arranged in the groove. The first sealing element of the utility model can effectively prevent liquid leakage; the second sealing element is static relative to the cooling roller, has zero friction with the cooling roller and can not be changed for years.
Description
Technical Field
The utility model belongs to the technical field of lithography apparatus, concretely relates to a sealing device that is used for chill roll and chamber that catchments.
Background
The cooling roller on the printing machine is mainly used for cooling printed matters, such as films, paper and the like. The working principle of cooling the cooling roller is as follows: the cooling water enters the cooling roller through the water inlet pipe, the circulation circle enters the water collecting cavity from the water outlet of the cooling roller, and finally the cooling water is discharged through the water discharging pipe at the bottom of the water collecting cavity. In order to avoid the leakage of cooling water from the connecting part between the cooling roller and the water collecting cavity, in the prior art, a sealing device between the cooling roller and the water collecting cavity is combined with a sealing ring in a sealing mode through spiral sealing.
The sealing ring is a V-shaped sealing ring, is arranged at the joint of the cooling roller and the water collecting cavity and belongs to contact type forming filler sealing, and the sealing ring and the water collecting cavity are kept static in the rotating process of the cooling roller. Although the sealing ring is simple to install and easy to maintain, and can realize zero leakage under static seal, the defects are obvious under dynamic seal. The rubber sealing ring is self-tightened under thermal expansion, but corresponding friction is increased, and the rotating resistance of the cooling roller is increased. Meanwhile, in the rotating process of the cooling roller, the cooling roller continuously rubs with the sealing ring, so that the sealing ring is easily worn and loses efficacy, and the service life of the sealing ring is shortened. Therefore, the service life of the sealing ring between the cooling roller and the water collecting cavity in the prior art is generally 6-9 months, and the sealing ring needs to be replaced frequently.
A screw seal is a typical form of non-contact seal, which is a screw thread provided at the wall of the cooling roll that extends into the water collection chamber. The leaking liquid forms a "liquid nut" in the space formed between the threads and the housing. The spiral on the cooling roller generates axial movement when rotating, and liquid is continuously pushed back to the high-pressure side and returns to the water collecting cavity. However, the screw seal of the original design does not have a housing, which results in the so-called "liquid nut" pumping effect not taking place at all. Meanwhile, according to the requirements of sealing and lubricating design handbook, the spiral sealing is not suitable for the condition that the linear speed is more than 4M/S, and the linear speed within 4M/S is far lower than the normal rotating speed of the equipment. Therefore, the spiral seal used between the cooling roller and the water collecting cavity in the prior art is similar to a dummy seal, and cannot play a role in sealing.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving among the prior art and adopting spiral seal and sealing washer to seal between chill roll and the chamber that catchments, and the sealing washer life-span needs often to be changed and spiral seal plays the problem that can not play the sealing effect shorter, has provided a sealing device who is used for chill roll and the chamber that catchments.
In order to realize the technical purpose, the utility model adopts the following technical scheme:
a sealing device for a cooling roller and a water collecting cavity is characterized in that the cooling roller is rotationally matched with the water collecting cavity and comprises a first sealing element, the first sealing element is composed of a static ring and a movable ring, and the static ring and the movable ring are both sleeved outside the cooling roller; the first end of the static ring is fixedly connected with the outer wall of the water collecting cavity, and the second end of the static ring is close to the dynamic ring; the inner side surface of the movable ring is fixedly connected with the outer wall of the cooling roller, and the movable ring is in rotating fit with the static ring; the static ring is provided with an air inlet channel along the diameter direction of the cooling roller; the air inlet of the air inlet channel is positioned on the outer side surface of the static ring, and the air outlet is positioned on the inner side surface of the static ring; a clearance between the movable ring and the static ring forms a labyrinth passage, and the labyrinth passage is communicated with the air inlet passage so that the labyrinth passage is filled with air; a second seal is also included; the inner side surface of the movable ring is provided with a groove, and a second sealing piece fixedly connected with the outer wall of the cooling roller is arranged in the groove.
Furthermore, a gap between the water collecting cavity and the cooling roller is a first gap, and a gap between the static ring and the cooling roller is a second gap; and one part of air flowing out of the air outlet of the air inlet channel enters the first gap, and the other part of air enters the labyrinth channel through the second gap.
Furthermore, a plurality of annular first bulges and a plurality of annular second grooves are arranged at the second end of the static ring, and a plurality of annular first grooves and a plurality of annular second bulges are arranged at the end of the dynamic ring opposite to the static ring; the movable ring is matched with the first bulge through the first groove and the second bulge is matched with the second groove respectively to be in rotating fit with the stationary ring.
Further, the first sealing element is matched with the first protrusion through the first groove, and the second protrusion is matched with the second groove to form the labyrinth passage.
Further, first recess passes through first arch and constitutes first cavity and second cavity from inside to outside, and wherein the volume of first cavity is greater than the volume of second cavity.
Furthermore, the second sealing element is an O-shaped ring, and the number of the O-shaped rings is two.
Furthermore, the static ring, the dynamic ring and the O-shaped ring are formed by splicing two semicircular rings.
Further, the air is clean air.
Compared with the prior art, the utility model has the beneficial technical effects that:
the cooling roller and the water collecting cavity are sealed by combining the first sealing element and the second sealing element, so that the sealing effect between the cooling roller and the water collecting cavity is enhanced; the first sealing element is combined with a labyrinth sealing mode by adopting a gas positive pressure sealing mode, air enters the labyrinth channel from the air inlet channel in the static ring, the pressure in the labyrinth channel is increased, liquid leakage is effectively prevented, and the leakage pressure of the first sealing element is effectively reduced by utilizing the throttling effect of the labyrinth channel; the second sealing element is in a molding filler sealing mode, is static relative to the cooling roller, has zero friction with the cooling roller, and can not be changed for years.
Drawings
FIG. 1 is a schematic view of an installation position of a sealing device for a cooling roller and a water collecting cavity according to an embodiment of the present invention;
fig. 2 is a cross-sectional structure view of a sealing device for a cooling roller and a water collecting cavity according to an embodiment of the present invention.
FIG. 3 is a structural diagram of a stationary ring according to an embodiment of the present invention;
fig. 4 is a detailed cross-sectional view of a stationary ring according to an embodiment of the present invention.
FIG. 5 is a structural diagram of a movable ring according to an embodiment of the present invention;
fig. 6 is a detailed cross-sectional view of the rotating ring according to the embodiment of the present invention.
In the figure: the cooling device comprises a cooling roller 1, a water collecting cavity 2, a first sealing element 3, a stationary ring 31, an air inlet channel 311, an air inlet 312, an air outlet 313, a first protrusion 314, a second groove 315, a movable ring 32, a first groove 321, a first cavity 322, a second cavity 323, a second protrusion 324 and a second sealing element 4.
Detailed Description
The invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto.
As shown in fig. 1 to 6, the sealing device for the cooling roller and the water collecting chamber of the present embodiment includes a first sealing member 3 and a second sealing member 4. The first sealing member 3 is composed of a stationary ring 31 and a movable ring 32, and both the stationary ring 31 and the movable ring 32 are sleeved outside the cooling roller 1. The first end of the static ring 31 is fixedly connected with the outer wall of the water collecting cavity 2, and the second end is close to the movable ring 32. The inner side surface of the movable ring 32 is fixedly connected with the outer wall of the cooling roller 1, and the movable ring 32 is in rotating fit with the fixed ring 31. The stationary ring 31 is provided with an intake passage 311 in the diameter direction of the cooling roll 1. The air inlet 312 of the air inlet passage 311 is located on the outer side surface of the stationary ring 31, and the air outlet 313 is located on the inner side surface of the stationary ring 31. The gap between the moving ring 32 and the stationary ring 31 constitutes a labyrinth passage, which communicates with the intake passage 311 to fill the labyrinth passage with air. The inner side surface of the movable ring 32 is provided with a groove, and a second sealing element 4 fixedly connected with the outer wall of the cooling roller 1 is arranged in the groove.
The first sealing element 3 is in a non-contact sealing mode based on the Reynolds theorem and the Bernoulli equation, and is formed by combining a gas positive pressure sealing mode and a labyrinth sealing mode. In the rotating process of the cooling roller 1, the movable ring 32 is not in contact with the fixed ring 31, the labyrinth passage is filled with air, cooling water is prevented from entering the labyrinth passage, the cooling water is effectively prevented from leaking, and the leakage pressure of the first sealing element 3 is effectively reduced by utilizing the throttling effect of the labyrinth passage. The second sealing element 4 is sealed by adopting contact type molding filler, is static relative to the cooling roller 1, and can further enhance the sealing performance between the cooling roller 1 and the water collecting cavity 2. In the rotating process of the cooling roller 1, zero friction exists between the second sealing element 4 and the cooling roller 1, so that the service life of the second sealing element 4 is long, and the second sealing element can not be replaced for years. Therefore, the utility model discloses a first sealing member 3 combines together with second sealing member 4 and seals chill roll 1 and chamber 2 that catchments, can prolong second sealing member 4's life to can strengthen chill roll 1 and the sealed effect between the chamber 2 that catchments.
The gap between the water collecting cavity 2 and the cooling roller 1 is a first gap, and the gap between the static ring 31 and the cooling roller 1 is a second gap. The air flowing out of the air outlet 313 of the air inlet passage 311 partially enters the first slit, and partially enters the labyrinth passage through the second slit. The air forms the high pressure section in first gap, and chill roll 1 promotes liquid toward the high pressure section motion that is close to water collecting cavity 2 at the pivoted in-process, prevents effectively that liquid from revealing. As shown in fig. 3-6, the second end of the stationary ring 31 is provided with a plurality of ring-shaped first protrusions 314 and a plurality of ring-shaped second grooves 315, and the end of the moving ring 32 opposite to the stationary ring 31 is provided with a plurality of ring-shaped first grooves 321 and a plurality of ring-shaped second protrusions 324. The movable ring 32 is rotatably fitted to the stationary ring 31 by fitting the first recess 321 to the first protrusion 314 and fitting the second protrusion 324 to the second recess 315, respectively. In operation, the cooling roller 1 rotates to drive the rotating ring 32 to rotate, wherein the first protrusions 314 rotate relatively in the first grooves 321, and the second protrusions 324 rotate in the second grooves 315. During the rotation of the cooling roller 1, the first protrusions 314 do not contact the first grooves 321, and the second protrusions 324 do not contact the second grooves 315.
The first seal 3 is adapted to the first protrusion 314 through the first groove 321, and the second protrusion 324 is adapted to the second groove 315 to form the labyrinth passage. The first protrusion 314 forms a first cavity 322 and a second cavity 323 from the first groove 321 from inside to outside, wherein the volume of the first cavity 322 is larger than that of the second cavity 323. The first cavity 322 is located closer to the cooling roll 1. As can be seen from reynolds' law, the air pressure of the first chamber 322 is smaller than that of the second chamber 323. When the second cavity 323 is small enough, it can be known from reynolds' law and air viscosity that the second cavity forms a rigid air film, and the rigid air film can enhance the sealing performance of the first sealing member 3 to the outside. The second seal 4 is an O-ring. In order to further enhance the sealing effect, the number of the O-shaped rings is two. The static ring 31, the movable ring 32 and the O-shaped ring 4 are formed by splicing two semicircular rings, the splicing part is tightly connected, the cooling roller 1 does not need to be disassembled when the installation is carried out in the embodiment, the connecting structure of the original equipment does not need to be changed, and only the sealing device is required to be installed on the basis of the original equipment. The air introduced into the air inlet passage 311 is clean air, and the air passes through the filtering device and the oil mist separation device in sequence to form the required clean air with a certain pressure.
The embodiments of the present invention have been described in detail, and those skilled in the art can easily understand that there are various changes in the embodiments according to the idea of the present invention, and such changes should be considered as the protection scope of the present invention.
Claims (8)
1. The utility model provides a sealing device for chill roll and chamber that catchments, chill roll normal running fit in the chamber that catchments which characterized in that:
the cooling roller comprises a first sealing element (3), wherein the first sealing element (3) is composed of a static ring (31) and a dynamic ring (32), and the static ring (31) and the dynamic ring (32) are sleeved outside the cooling roller (1); the first end of the static ring (31) is fixedly connected with the outer wall of the water collecting cavity (2), and the second end of the static ring is close to the dynamic ring (32); the inner side surface of the movable ring (32) is fixedly connected with the outer wall of the cooling roller (1), and the movable ring (32) is in rotating fit with the static ring (31);
the static ring (31) is provided with an air inlet channel (311) along the diameter direction of the cooling roller (1); an air inlet (312) of the air inlet channel (311) is positioned on the outer side surface of the static ring (31), and an air outlet (313) is positioned on the inner side surface of the static ring (31); a clearance between the movable ring (32) and the static ring (31) forms a labyrinth passage, and the labyrinth passage is communicated with the air inlet passage (311) so that the labyrinth passage is filled with air;
further comprising a second seal (4); the inner side surface of the movable ring (32) is provided with a groove, and a second sealing element (4) fixedly connected with the outer wall of the cooling roller (1) is arranged in the groove.
2. The sealing device for a chill roll and a water collection chamber of claim 1, wherein: a gap between the water collecting cavity (2) and the cooling roller (1) is a first gap, and a gap between the static ring (31) and the cooling roller (1) is a second gap; a part of the air flowing out of the air outlet (313) of the air inlet channel (311) enters the first gap, and the other part of the air enters the labyrinth channel through the second gap.
3. A sealing device for a chill roll and a water collection chamber according to claim 2, wherein: a plurality of annular first bulges (314) and a plurality of annular second grooves (315) are arranged at the second end of the static ring (31), and a plurality of annular first grooves (321) and a plurality of annular second bulges (324) are arranged at the end of the dynamic ring (32) opposite to the static ring (31); the movable ring (32) is matched with the fixed ring (31) in a rotating way through the first groove (321) and the first protrusion (314) respectively, and the second protrusion (324) and the second groove (315) respectively.
4. A sealing device for a chill roll and a water collection chamber according to claim 3, wherein:
the first sealing element (3) is matched with the first protrusion (314) through the first groove (321), and the second protrusion (324) is matched with the second groove (315) to form the labyrinth passage.
5. The sealing device for a chill roll and a water collection chamber of claim 4, wherein: the first groove (321) forms a first cavity (322) and a second cavity (323) from inside to outside through the first protrusion (314), wherein the volume of the first cavity (322) is larger than that of the second cavity (323).
6. The sealing device for a chill roll and a water collection chamber of claim 1, wherein: the second sealing elements (4) are O-shaped rings, and the number of the O-shaped rings is two.
7. The sealing device for a chill roll and a water collection chamber of claim 6, wherein: the static ring (31), the movable ring (32) and the O-shaped ring are formed by splicing two semicircular rings.
8. Sealing device for a cooling roller and a water collection chamber according to claim 1 or 2, characterized in that: the air is clean air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922077058.7U CN210978522U (en) | 2019-11-27 | 2019-11-27 | Sealing device for cooling roller and water collecting cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922077058.7U CN210978522U (en) | 2019-11-27 | 2019-11-27 | Sealing device for cooling roller and water collecting cavity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210978522U true CN210978522U (en) | 2020-07-10 |
Family
ID=71416021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922077058.7U Active CN210978522U (en) | 2019-11-27 | 2019-11-27 | Sealing device for cooling roller and water collecting cavity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210978522U (en) |
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2019
- 2019-11-27 CN CN201922077058.7U patent/CN210978522U/en active Active
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Address after: 303, 3rd floor, No.1 Haikou 2nd Road, Jinyinhu office, Dongxihu District, Wuhan City, Hubei Province Patentee after: Wuhan danyaxiang Biotechnology Co.,Ltd. Address before: 303, 3rd floor, No.1 Haikou 2nd Road, Jinyinhu office, Dongxihu District, Wuhan City, Hubei Province Patentee before: HUBEI DANYAXIANG BIOLOGICAL TECHNOLOGY Co.,Ltd. |