Combined end face sealing structure

Abstract

The invention discloses a combined end face sealing structure which is used for a vacuum rotary kiln, the vacuum rotary kiln comprises a movable cylinder and a static cylinder which are connected in a sleeved mode, and the combined end face sealing structure is arranged at the sleeved position of the movable cylinder and the static cylinder. The combined end face sealing structure comprises an end face sealing structure, a flexible packing sealing structure, a labyrinth sealing structure and an inert gas positive pressure sealing structure. The end face sealing structure comprises a movable ring arranged at the end of the movable cylinder in a sleeving mode, a static ring arranged at the end of the static cylinder in a sleeving mode, a movable wear-resisting ring and a static wear-resisting ring, the movable wear-resisting ring and the static wear-resisting ring are arranged between the movable ring and the static ring, the static wear-resisting ring is provided with a static wear-resisting ring gas channel, and the movable wear-resisting ring is provided with a movable wear-resisting ring gas channel. And the inert gas interface is communicated with the static wear-resistant ring gas channel. Through the combination of the end face sealing structure, the flexible packing sealing structure, the labyrinth sealing structure and the inert gas positive pressure sealing structure, the sealing problem of the junction of the movable cylinder and the static cylinder of the rotary cylinder of the vacuum rotary kiln is solved.

Description

Technical Field

[0001] The invention relates to the technical field of sealing structures of vacuum equipment, and in particular to a combined end face sealing structure. Background Art

[0002] The vacuum rotary kiln is a thermal equipment that needs to completely isolate oxygen from the inside of the rotary drum. In the field of lithium battery negative electrode material production, the rotary drum works under the conditions of 1000℃ high temperature outside and full of flammable and explosive gas inside. The inside of the rotary drum needs to be completely isolated from oxygen to ensure safety. The sealing problem at the junction of the moving drum and the static drum of the vacuum rotary kiln rotary drum is the main technical focus and difficulty.

[0003] The traditional dynamic seals at the junction of the moving cylinder and the stationary cylinder of the rotating cylinder mainly include labyrinth seals, end face seals, fish scale laminate seals, packing seals, etc. For example, patent CN 207500478 U "An end face sealing structure" discloses an end face sealing structure, which fits a dynamic wear-resistant ring and a static wear-resistant ring. The two wear-resistant rings squeeze and rub against each other to achieve an end face sealing effect.

[0004] However, the above sealing structure has disadvantages such as poor sealing effect or short service life. In order to solve the sealing problem at the junction of the moving cylinder and the static cylinder of the rotary cylinder of the vacuum rotary kiln, the present invention provides a combined end face sealing structure. Summary of the invention

[0005] In order to solve at least one technical problem in the prior art, the present invention provides a combined end face sealing structure.

[0006] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is: a combined end face sealing structure, used for a vacuum rotary kiln, the vacuum rotary kiln comprises a sleeved moving cylinder and a stationary cylinder, the combined end face sealing structure is arranged at the sleeve joint of the moving cylinder and the stationary cylinder, the combined end face sealing structure comprises an end face sealing structure, a flexible packing sealing structure, a labyrinth sealing structure, and an inert gas positive pressure sealing structure;

[0007] The end face sealing structure comprises a dynamic ring sleeved on the end of the dynamic cylinder, a static ring sleeved on the end of the static cylinder, and a dynamic wear-resistant ring and a static wear-resistant ring arranged between the dynamic ring and the static ring, the static wear-resistant ring is provided with a static wear-resistant ring gas channel, and the dynamic wear-resistant ring is provided with a dynamic wear-resistant ring gas channel;

[0008] The flexible packing sealing structure comprises a ceramic packing arranged between the dynamic wear-resistant ring and the static wear-resistant ring;

[0009] The labyrinth sealing structure comprises a dynamic ring labyrinth and a static ring labyrinth, wherein the dynamic ring labyrinth and the static ring labyrinth form a labyrinth channel, and the labyrinth channel is respectively connected to the static wear-resistant ring gas channel and the dynamic wear-resistant ring gas channel;

[0010] The inert gas positive pressure sealing structure comprises an inert gas interface, one end of which is connected to the gas channel of the static wear-resistant ring.

[0011] In some embodiments, a plurality of stationary cylinder ribs for abutting the stationary ring are evenly arranged at the end of the stationary cylinder along the circumferential direction, and a plurality of dynamic cylinder ribs for abutting the dynamic ring are evenly arranged at the end of the dynamic cylinder along the circumferential direction.

[0012] In some embodiments, a first axial space and a second axial space are formed between the stationary ring and the dynamic ring, the length of the first axial space is L1, the length of the second axial space is L2, and L1>L2;

[0013] The dynamic wear-resistant ring and the static wear-resistant ring are arranged in the first axial space, and the labyrinth seal structure is arranged in the second axial space.

[0014] In some embodiments, the end face sealing structure also includes a dynamic ring clamping flange and a stationary ring clamping flange, the dynamic ring clamping flange fixes the dynamic wear-resistant ring in the first axial space at the outer end face of the dynamic wear-resistant ring, and the stationary ring clamping flange fixes the static wear-resistant ring in the first axial space at the outer end face of the static wear-resistant ring.

[0015] In certain embodiments, the end face sealing structure further includes a dynamic ring fastener and a static ring fastener, the dynamic ring clamping flange is connected to the dynamic ring via the dynamic ring fastener, and the static ring clamping flange is connected to the static ring via the static ring fastener.

[0016] In some embodiments, the end face sealing structure also includes a dynamic ring asbestos rubber pad and a static ring asbestos rubber pad, the dynamic ring asbestos rubber pad is arranged between the dynamic ring clamping flange and the dynamic ring, and the static ring asbestos rubber pad is arranged between the static ring clamping flange and the static ring.

[0017] In certain embodiments, the end faces of the static wear-resistant ring and the dynamic wear-resistant ring that abut against each other are provided with an annular sealing groove extending in the circumferential direction, and a ceramic packing is arranged in the annular sealing groove.

[0018] In certain embodiments, the stationary ring maze and the dynamic ring maze are alternately arranged along the radial direction of the stationary ring or the dynamic ring to form a tortuous gas channel, and the gas channel is the maze channel.

[0019] In some embodiments, the static wear-resistant ring gas channel includes a static wear-resistant ring radial gas channel and a static wear-resistant ring axial gas channel, and the static wear-resistant ring is provided with a first through hole extending in the axial direction, and the first through hole constitutes the static wear-resistant ring axial gas channel;

[0020] The static wear-resistant ring is provided with a second through hole which radially penetrates from the axial gas channel of the static wear-resistant ring to the direction close to the labyrinth sealing structure, and the second through hole constitutes the radial gas channel of the static wear-resistant ring, the axial gas channel of the static wear-resistant ring is connected with the inert gas interface, and the radial gas channel of the static wear-resistant ring is connected with the labyrinth channel.

[0021] In some embodiments, the dynamic wear-resistant ring gas channel includes a dynamic wear-resistant ring radial gas channel and a dynamic wear-resistant ring axial gas channel, and the dynamic wear-resistant ring is provided with a groove extending axially and circumferentially to form an annular shape, and the groove constitutes the dynamic wear-resistant ring axial gas channel;

[0022] The dynamic wear-resistant ring has a through hole radially penetrating from the axial gas channel of the dynamic wear-resistant ring to the direction close to the labyrinth sealing structure, and the through hole constitutes the radial gas channel of the dynamic wear-resistant ring. The axial gas channel of the dynamic wear-resistant ring is connected with the gas channel of the static wear-resistant ring, and the radial gas channel of the wear-resistant ring is connected with the labyrinth channel.

[0023] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0024] The present invention solves the sealing problem at the junction of the dynamic cylinder and the static cylinder of the rotary cylinder of the vacuum rotary kiln through the combination of the end face sealing structure, the flexible packing sealing structure, the labyrinth sealing structure and the inert gas positive pressure sealing structure; on the one hand, the end face sealing and the flexible packing sealing effects are achieved through the extrusion and friction of the dynamic wear-resistant ring, the static wear-resistant ring and the flexible packing ceramic packing; on the other hand, the labyrinth sealing structure of the dynamic ring labyrinth and the static ring labyrinth prevents the high-temperature materials inside the rotary cylinder from damaging the dynamic wear-resistant ring and the static wear-resistant ring by high temperature, thereby achieving the labyrinth sealing effect; on the other hand, through the gas channel in the dynamic wear-resistant ring and the gas channel in the static wear-resistant ring, by the introduction of external inert gas, the combined end face sealing structure is cooled and positively pressured to isolate oxygen. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a cross-sectional view of a combined end face sealing structure of the present invention.

[0026] Among them: 1. Moving cylinder; 2. Static cylinder; 3. Moving cylinder rib plate; 4. Static cylinder rib plate;

[0027] 10. Moving ring; 11. Moving wear-resistant ring; 111. Moving wear-resistant ring radial gas channel; 112. Moving wear-resistant ring axial gas channel; 12. Moving ring labyrinth; 13. Labyrinth channel; 14. Moving ring clamping flange; 15. Moving ring fastener; 16. Moving ring asbestos rubber pad;

[0028] 20. Stationary ring; 21. Stationary wear-resistant ring; 211. Radial gas channel of stationary wear-resistant ring; 212. Axial gas channel of stationary wear-resistant ring; 22. Stationary ring labyrinth; 23. Inert gas interface; 24. Stationary ring clamping flange; 25. Stationary ring fasteners; 26. Stationary ring asbestos rubber pad; 27. Ceramic packing. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them.

[0030] Embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of this application.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0033] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0034] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present 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.

[0036] Reference Figure 1 The present invention provides a combined end face sealing structure for a vacuum rotary kiln. The vacuum rotary kiln includes a sleeved moving cylinder 1 and a stationary cylinder 2. The combined end face sealing structure is arranged at the sleeve joint of the moving cylinder 1 and the stationary cylinder 2. The combined end face sealing structure includes an end face sealing structure, a flexible packing sealing structure, a labyrinth sealing structure, and an inert gas positive pressure sealing structure.

[0037] The end face sealing structure includes a dynamic ring 10 sleeved on the end of the dynamic cylinder 1, a static ring 20 sleeved on the end of the static cylinder 2, and a dynamic wear-resistant ring 11 and a static wear-resistant ring 21 arranged between the dynamic ring 10 and the static ring 20, wherein the static wear-resistant ring 21 is provided with a static wear-resistant ring gas channel, and the dynamic wear-resistant ring 11 is provided with a dynamic wear-resistant ring gas channel. The flexible packing sealing structure includes a ceramic packing 27 arranged between the dynamic wear-resistant ring 11 and the static wear-resistant ring 21. The labyrinth sealing structure includes a dynamic ring labyrinth 12 and a static ring labyrinth 22, and the dynamic ring labyrinth 12 and the static ring labyrinth 22 form a labyrinth channel 13, and the labyrinth channel 13 is connected to the static wear-resistant ring gas channel and the dynamic wear-resistant ring gas channel respectively. The inert gas positive pressure sealing structure includes an inert gas interface 23, and one end of the inert gas interface 23 is connected to the static wear-resistant ring gas channel.

[0038] The present invention solves the sealing problem at the junction of the dynamic cylinder and the static cylinder of the rotary cylinder of the vacuum rotary kiln through a combination of an end face sealing structure, a flexible packing sealing structure, a labyrinth sealing structure, and an inert gas positive pressure sealing structure. Specifically, on the one hand, the end face sealing and the flexible packing sealing effects are achieved through the extrusion and friction of the dynamic wear-resistant ring 11, the static wear-resistant ring 21, and the flexible packing ceramic packing 27; on the other hand, the labyrinth sealing structure of the dynamic ring labyrinth 12 and the static ring labyrinth 22 prevents the high-temperature materials inside the rotary cylinder from damaging the dynamic wear-resistant ring 11 and the static wear-resistant ring 21, thereby achieving the labyrinth sealing effect; on the other hand, through the gas channel in the dynamic wear-resistant ring 11 and the gas channel in the static wear-resistant ring 21, the combined end face sealing structure is cooled and positively pressurized to isolate oxygen through the introduction of external inert gas.

[0039] In some embodiments, the cross-sections of the stationary ring 20 and the dynamic ring 10 are both "L"-shaped, and a first axial space and a second axial space are formed between the stationary ring 20 and the dynamic ring 10. The length of the first axial space is L1, and the length of the second axial space is L2, where L1>L2. The dynamic wear-resistant ring 10 and the stationary wear-resistant ring 20 are arranged in the first axial space, and the labyrinth seal structure is arranged in the second axial space.

[0040] In some embodiments, the end face sealing structure also includes a dynamic ring clamping flange 14 and a stationary ring clamping flange 24. The dynamic ring clamping flange 14 fixes the dynamic wear-resistant ring 11 in the first axial space at the outer end face of the dynamic wear-resistant ring 11, and the stationary ring clamping flange 24 fixes the static wear-resistant ring 21 in the first axial space at the outer end face of the static wear-resistant ring 21.

[0041] In some embodiments, the end face sealing structure also includes a dynamic ring fastener 15 and a stationary ring fastener 25 , wherein the dynamic ring clamping flange 14 is connected to the dynamic ring 10 via the dynamic ring fastener 15 , and the stationary ring clamping flange 24 is connected to the stationary ring 21 via the stationary ring fastener 25 .

[0042] Furthermore, the stationary ring 20 is provided with a stationary ring bolt connection hole, and the stationary ring clamping flange 24 is connected to the stationary ring 20 by a stationary ring fastener 25 passing through the stationary ring bolt connection hole; the dynamic ring 10 is provided with a dynamic ring bolt connection hole, and the dynamic ring clamping flange 14 is connected to the dynamic ring 10 by a dynamic ring fastener 15 passing through the dynamic ring bolt connection hole.

[0043] In some embodiments, the end face sealing structure also includes a dynamic ring asbestos rubber pad 16 and a static ring asbestos rubber pad 26. The dynamic ring asbestos rubber pad 16 is arranged between the dynamic ring clamping flange 14 and the dynamic ring 10, and the static ring asbestos rubber pad 26 is arranged between the static ring clamping flange 24 and the static ring 21.

[0044] In some embodiments, the end surface of the static wear-resistant ring 21 abutting against the dynamic wear-resistant ring 11 is provided with an annular sealing groove extending in the circumferential direction, and a ceramic packing 27 is arranged in the annular sealing groove.

[0045] In some embodiments, a plurality of stationary ring labyrinths 22 and a plurality of dynamic ring labyrinths 12 are alternately arranged along the radial direction of the stationary ring 20 or the dynamic ring 10 to form a tortuous gas channel, and the gas channel is a labyrinth channel 13 .

[0046] Along the radial direction of the stationary ring 20, a plurality of stationary ring labyrinths 22 are fixed at intervals on the inner end surface of the stationary ring 20. Preferably, the stationary ring labyrinths 22 are fixed to the inner end surface of the stationary ring 20 by welding. Along the radial direction of the moving ring 10, a plurality of moving ring labyrinths 12 are fixed at intervals on the inner end surface of the moving ring 10. Preferably, the moving ring labyrinths 12 are fixed to the inner end surface of the moving ring 10 by welding.

[0047] In some embodiments, the static wear-resistant ring gas channel includes a static wear-resistant ring radial gas channel 211 and a static wear-resistant ring axial gas channel 212. The static wear-resistant ring 21 is provided with a first through hole extending axially, and the first through hole constitutes the static wear-resistant ring axial gas channel 212; the static wear-resistant ring 21 is provided with a second through hole radially extending from the static wear-resistant ring axial gas channel 212 to the direction close to the labyrinth sealing structure, and the second through hole constitutes the static wear-resistant ring radial gas channel 211. The static wear-resistant ring axial gas channel 212 is connected to the inert gas interface 23, and the static wear-resistant ring radial gas channel 211 is connected to the labyrinth channel 13.

[0048] In some embodiments, the dynamic wear-resistant ring gas channel includes a dynamic wear-resistant ring radial gas channel 111 and a dynamic wear-resistant ring axial gas channel 112. The dynamic wear-resistant ring 11 is provided with a ring-shaped groove extending axially and circumferentially, and the groove constitutes the dynamic wear-resistant ring axial gas channel 112; the dynamic wear-resistant ring 11 has an automatic wear-resistant ring axial gas channel 112, and a through hole radially penetrates in the direction close to the labyrinth sealing structure, and the through hole constitutes the dynamic wear-resistant ring radial gas channel 111. The dynamic wear-resistant ring axial gas channel 112 is connected with the static wear-resistant ring gas channel, and the wear-resistant ring radial gas channel 111 is connected with the labyrinth channel 13.

[0049] In some embodiments, a plurality of stationary cylinder ribs 4 for supporting the stationary ring 20 are evenly arranged at the end of the stationary cylinder 2 along the circumferential direction, and a plurality of dynamic cylinder ribs 3 for supporting the dynamic ring 10 are evenly arranged at the end of the dynamic cylinder 1 along the circumferential direction.

[0050] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to the above embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without removing the spirit or scope of the present invention. Therefore, the present invention will not be limited to the above embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A combined end face sealing structure for a vacuum rotary kiln, wherein the vacuum rotary kiln comprises a sleeved moving cylinder and a stationary cylinder, wherein the combined end face sealing structure is arranged at the sleeved joint of the moving cylinder and the stationary cylinder, and wherein: The combined end face sealing structure includes an end face sealing structure, a flexible packing sealing structure, a labyrinth sealing structure, and an inert gas positive pressure sealing structure; The end face sealing structure comprises a dynamic ring sleeved on the end of the dynamic cylinder, a static ring sleeved on the end of the static cylinder, and a dynamic wear-resistant ring and a static wear-resistant ring arranged between the dynamic ring and the static ring, the static wear-resistant ring is provided with a static wear-resistant ring gas channel, and the dynamic wear-resistant ring is provided with a dynamic wear-resistant ring gas channel; The flexible packing sealing structure comprises a ceramic packing arranged between the dynamic wear-resistant ring and the static wear-resistant ring; The labyrinth sealing structure comprises a dynamic ring labyrinth and a static ring labyrinth, wherein the dynamic ring labyrinth and the static ring labyrinth form a labyrinth channel, and the labyrinth channel is respectively connected to the static wear-resistant ring gas channel and the dynamic wear-resistant ring gas channel; The inert gas positive pressure sealing structure comprises an inert gas interface, one end of which is connected to the gas channel of the static wear-resistant ring.

2. The combined end face sealing structure according to claim 1, characterized in that: The end of the stationary cylinder is evenly provided with a plurality of stationary cylinder ribs for abutting against the stationary ring along the circumferential direction, and the end of the dynamic cylinder is evenly provided with a plurality of dynamic cylinder ribs for abutting against the dynamic ring along the circumferential direction.

3. The combined end face sealing structure according to claim 1, characterized in that: A first axial space and a second axial space are formed between the stationary ring and the dynamic ring, the length of the first axial space is L1, the length of the second axial space is L2, and L1>L2; The dynamic wear-resistant ring and the static wear-resistant ring are arranged in the first axial space, and the labyrinth seal structure is arranged in the second axial space.

4. The combined end face sealing structure according to claim 3, characterized in that: The end face sealing structure also includes a dynamic ring clamping flange and a stationary ring clamping flange. The dynamic ring clamping flange fixes the dynamic wear-resistant ring in the first axial space at the outer end face of the dynamic wear-resistant ring, and the stationary ring clamping flange fixes the static wear-resistant ring in the first axial space at the outer end face of the static wear-resistant ring.

5. The combined end face sealing structure according to claim 4, characterized in that: The end face sealing structure also includes a dynamic ring fastener and a static ring fastener, the dynamic ring clamping flange is connected to the dynamic ring via the dynamic ring fastener, and the static ring clamping flange is connected to the static ring via the static ring fastener.

6. The combined end face sealing structure according to claim 4, characterized in that: The end face sealing structure also includes a dynamic ring asbestos rubber pad and a static ring asbestos rubber pad. The dynamic ring asbestos rubber pad is arranged between the dynamic ring clamping flange and the dynamic ring, and the static ring asbestos rubber pad is arranged between the static ring clamping flange and the static ring.

7. The combined end face sealing structure according to claim 1, characterized in that: An annular sealing groove extending in the circumferential direction is provided on the end surface where the static wear-resistant ring and the dynamic wear-resistant ring abut against each other, and a ceramic packing is arranged in the annular sealing groove.

8. The combined end face sealing structure according to claim 1, characterized in that: The stationary ring maze and the dynamic ring maze are alternately arranged along the radial direction of the stationary ring or the dynamic ring to form a tortuous gas channel, and the gas channel is the maze channel.

9. The combined end face sealing structure according to claim 1, characterized in that: The static wear-resistant ring gas channel includes a static wear-resistant ring radial gas channel and a static wear-resistant ring axial gas channel. The static wear-resistant ring is provided with a first through hole extending in the axial direction, and the first through hole constitutes the static wear-resistant ring axial gas channel; The static wear-resistant ring is provided with a second through hole which radially penetrates from the axial gas channel of the static wear-resistant ring to the direction close to the labyrinth sealing structure, and the second through hole constitutes the radial gas channel of the static wear-resistant ring, the axial gas channel of the static wear-resistant ring is connected with the inert gas interface, and the radial gas channel of the static wear-resistant ring is connected with the labyrinth channel.

10. The combined end face sealing structure according to claim 1, characterized in that: The dynamic wear-resistant ring gas channel includes a dynamic wear-resistant ring radial gas channel and a dynamic wear-resistant ring axial gas channel, and the dynamic wear-resistant ring is provided with a groove extending in the axial direction and in the circumferential direction to form an annular groove, and the groove constitutes the dynamic wear-resistant ring axial gas channel; The dynamic wear-resistant ring has a through hole radially penetrating from the axial gas channel of the dynamic wear-resistant ring to the direction close to the labyrinth sealing structure, and the through hole constitutes the radial gas channel of the dynamic wear-resistant ring. The axial gas channel of the dynamic wear-resistant ring is connected with the gas channel of the static wear-resistant ring, and the radial gas channel of the wear-resistant ring is connected with the labyrinth channel.

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