CN108916387B - Dynamic sealing device for a rotary shaft in a non-uniform radial deformation state - Google Patents
Dynamic sealing device for a rotary shaft in a non-uniform radial deformation state Download PDFInfo
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- CN108916387B CN108916387B CN201811088704.3A CN201811088704A CN108916387B CN 108916387 B CN108916387 B CN 108916387B CN 201811088704 A CN201811088704 A CN 201811088704A CN 108916387 B CN108916387 B CN 108916387B
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- 238000007789 sealing Methods 0.000 title claims abstract description 186
- 239000000758 substrate Substances 0.000 claims abstract description 32
- 230000003068 static effect Effects 0.000 claims abstract description 22
- 230000000149 penetrating effect Effects 0.000 claims abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 15
- 229910002804 graphite Inorganic materials 0.000 claims description 15
- 239000010439 graphite Substances 0.000 claims description 15
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 230000000694 effects Effects 0.000 description 10
- 238000010030 laminating Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000000295 complement effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3436—Pressing means
- F16J15/3452—Pressing means the pressing force resulting from the action of a spring
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The invention discloses a dynamic sealing device for a rotary shaft in an uneven radial deformation state, which comprises: an annular substrate, a first seal assembly, and a second seal assembly; wherein, the center hole of the annular base plate is a through hole through which the rotary shaft passes; the first sealing assembly is arranged on the annular substrate, is provided with a plurality of dynamic sealing elements and a plurality of static sealing elements which are arranged around the central hole of the annular substrate, and the elastic front sealing end of each dynamic sealing element and the front sealing end of each static sealing element face the central hole and can be attached and sealed to the surface of the rotary shaft penetrating through the central hole; the second sealing assembly is arranged on the annular substrate, is provided with a plurality of dynamic sealing elements which are arranged around the central hole of the annular substrate, and the elastic front sealing ends of the dynamic sealing elements face the central hole and can be elastically attached and sealed on the surface of the rotary shaft penetrating through the central hole.
Description
Technical Field
The invention relates to the field of shaft sealing, in particular to a dynamic sealing device for a rotary shaft in an uneven radial deformation state.
Background
When the rotary kiln equipment is in operation, kiln heads and kiln tails at two ends are static, a kiln body in the middle is in rotary motion, materials and smoke in the rotary kiln move from the kiln body to the kiln tails, and sealing devices are required to be arranged at the positions of the kiln body, the kiln heads and the kiln tails in order to prevent air outside the rotary kiln from contacting the smoke in the rotary kiln. The prior rotary kiln sealing device mainly comprises non-contact labyrinth sealing, contact type scale sealing and the like. Because the combustion temperature in the rotary kiln is up to about 800 ℃, and the randomness of material distribution in the kiln causes uneven heating of the kiln body of the rotary kiln, the radial section of the kiln body is changed from the original circular shape to the elliptical shape, so that the sealing difficulty of the rotary kiln is increased, and the effect of the conventional sealing device is not ideal.
Disclosure of Invention
Based on the problems existing in the prior art, the invention aims to provide a dynamic sealing device for a rotating shaft in an uneven radial deformation state, which can seal the rotating shaft in the uneven radial deformation state, so as to achieve a better sealing effect.
The invention aims at realizing the following technical scheme:
embodiments of the present invention provide a dynamic sealing device for a rotary shaft in an uneven radial deformation state, comprising:
An annular substrate, a first seal assembly, and a second seal assembly; wherein,
The center hole of the annular substrate is a through hole through which the rotary shaft passes;
the first sealing assembly is arranged on the annular substrate, is provided with a plurality of dynamic sealing elements and a plurality of static sealing elements which are arranged around the central hole of the annular substrate, and the elastic front sealing end of each dynamic sealing element and the front sealing end of each static sealing element face towards the central hole and can be attached and sealed on the surface of the rotary shaft penetrating through the central hole;
The second sealing assembly is arranged on the annular substrate, the second sealing assembly is provided with a plurality of dynamic sealing elements which are arranged around the central hole of the annular substrate, the elastic front sealing ends of the dynamic sealing elements face to the central hole, and the surface of the rotary shaft penetrating through the central hole can be elastically attached and sealed.
As can be seen from the technical solution provided by the present invention, the dynamic sealing device for the rotation shaft in the non-uniform radial deformation state provided by the embodiment of the present invention has the beneficial effects that:
through set up first seal assembly and second seal assembly respectively on annular base plate, a plurality of dynamic seal spare and a plurality of quiet seal spare and the second seal assembly's of through first seal assembly a plurality of dynamic seal spare homoenergetic laminating revolution axle surface seals, owing to be the seal that a plurality of dynamic seal spare and a plurality of quiet seal spare constitute jointly, the conformality is better, can guarantee still the sealed effect of laminating all the time when revolution axle form changes.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural diagram of a dynamic sealing device according to an embodiment of the present invention;
FIG. 2 is a schematic front view of a dynamic seal device according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view at L-L in FIG. 2;
FIG. 4 is a schematic view, partially in section, of a dynamic seal provided in an embodiment of the present invention;
FIG. 5 is a schematic view of a portion of a first dynamic seal assembly of a dynamic seal device according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a dynamic seal block according to an embodiment of the present invention;
In the figure: 1-a first sealed box body; 2-a first dynamic seal block; 3-a second dynamic seal block; 4-a second dynamic seal adjusting bolt; 5-a second dynamic seal spring; 6-fixing bolts; 7-an axial compression spring; 8-an axial compression block; 9-a kiln body of the rotary kiln; 10-a ring-shaped substrate; 11-a second sealed box; 12-an axial compression plate; 13-a first dynamic seal adjustment bolt; 14-a first static seal block; 15-a first dynamic seal spring.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention. What is not described in detail in the embodiments of the present invention belongs to the prior art known to those skilled in the art.
As shown in fig. 1 to 4, an embodiment of the present invention provides a dynamic sealing device for a rotary shaft in a non-uniform radial deformation state, including:
An annular substrate, a first seal assembly, and a second seal assembly; wherein,
The center hole of the annular substrate is a through hole through which the rotary shaft passes;
the first sealing assembly is arranged on the annular substrate, is provided with a plurality of dynamic sealing elements and a plurality of static sealing elements which are arranged around the central hole of the annular substrate, and the elastic front sealing end of each dynamic sealing element and the front sealing end of each static sealing element face towards the central hole and can be attached and sealed on the surface of the rotary shaft penetrating through the central hole;
The second sealing assembly is arranged on the annular substrate, the second sealing assembly is provided with a plurality of dynamic sealing elements which are arranged around the central hole of the annular substrate, the elastic front sealing ends of the dynamic sealing elements face to the central hole, and the surface of the rotary shaft penetrating through the central hole can be elastically attached and sealed.
In the dynamic sealing device, the plurality of dynamic sealing elements and the plurality of static sealing elements of the first sealing assembly are distributed around the central hole of the annular base plate in an annular mode, and one dynamic sealing element and one static sealing element are alternately arranged.
In the dynamic sealing device, each dynamic seal of the first sealing assembly includes:
The device comprises a first sealing box body, a fixing bolt, a first dynamic sealing block, a first dynamic sealing spring and a first dynamic sealing adjusting bolt; wherein,
The first sealing box body is fixedly arranged on the annular substrate through a fixing bolt, and the front end opening of the first sealing box body faces to the central hole of the annular substrate;
the first dynamic sealing block is movably arranged in the first sealing box body, and the elastic front sealing end of the first dynamic sealing block is a concave arc-shaped surface matched with the surface of the rotary shaft;
The rear end of the first dynamic seal block in the first seal box body is provided with the first dynamic seal spring;
The first dynamic seal adjusting bolt is arranged at the rear end of the first seal box body, the front end of the first dynamic seal adjusting bolt stretches into the first seal box body to prop against the first dynamic seal spring, and the elastic force of the first dynamic seal block in the first seal box body in the radial direction can be adjusted through the first dynamic seal spring.
In the dynamic sealing device, the first dynamic sealing block is a graphite sealing block with a concave arc-shaped surface at the front end, and can be better attached to the outer surface of the rotating shaft.
In the dynamic sealing device, the second sealing component is positioned above the first sealing component and forms a double-layer sealing structure with the first sealing component, so that a three-dimensional sealing surface is formed, complementary sealing can be achieved, and a better sealing effect is ensured. Preferably, each dynamic seal of the second seal assembly may be disposed above a static seal of the first seal assembly.
In the dynamic sealing device, each dynamic seal of the second sealing assembly includes:
The second sealing box body, the fixing bolt, the second dynamic sealing block, the axial compression spring, the axial compression block, the second dynamic sealing spring and the second dynamic sealing adjusting bolt; wherein,
The second sealing box body is arranged on the annular substrate through a fixing bolt, and the front end opening of the second sealing box body faces to the central hole of the annular substrate;
The second movable sealing block is movably arranged in the second sealing box body, and the elastic front sealing end of the second movable sealing block is a concave arc-shaped surface matched with the surface of the rotary shaft;
The second sealing box body is provided with the axial compression spring and the axial compression block, and can compress the second dynamic sealing block in the second sealing box body along the axial direction of the rotating shaft;
The rear end of the second dynamic seal block in the second seal box body is provided with the second dynamic seal spring;
The second dynamic seal adjusting bolt is arranged at the rear end of the second seal box body, the front end of the second dynamic seal adjusting bolt stretches into the second seal box body to prop against the second dynamic seal spring, and the elastic force of the second dynamic seal block in the second seal box body in the radial direction can be adjusted through the second dynamic seal spring.
The second seal assembly of this kind of structure is convenient to radially adjust the elasticity of second dynamic seal piece, better assurance to the laminating seal of revolving shaft surface, also conveniently adjusts the first dynamic seal piece of the better tight first layer of subsides of second dynamic seal piece in the axial moreover, reduces the ascending clearance of both axial, better realization complementary seal.
In the dynamic sealing device, the second dynamic sealing block adopts the graphite sealing block with the front end provided with the concave arc-shaped surface, and can be better attached to the outer surface of the rotating shaft.
In the dynamic sealing device, the total number of the plurality of dynamic sealing elements of the first sealing assembly and the plurality of static sealing elements and the plurality of dynamic sealing elements of the second sealing assembly is not less than 150. Through setting up many moving seal spare and the quiet sealing member of quantity, can reach better conformality, ensure to seal the gyration axle surface of shape change.
As shown in fig. 5, in the dynamic sealing device, each static seal of the first seal assembly includes:
The sealing device comprises a fixed sealing box and a graphite sealing block which is arranged at the front end in the fixed sealing box and provided with a concave arc-shaped surface. Because the static sealing element adopts the graphite sealing block with the front end provided with the concave arc-shaped surface, the surface of the rotary shaft can be better replaced.
Preferably, the fixed seal box is connected with the first seal box body of the first seal assembly into an integrated structure.
The rotating shaft in the dynamic sealing device can also be a cylindrical surface of the kiln body of the rotary kiln.
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
The embodiment provides a dynamic sealing device, which can dynamically seal a revolving body with uniformly-enlarged and reduced radial directions (still with a circular section) in the revolving motion, solves the problem that the sealing effect of the revolving body with an elliptic section is poor in the revolving motion, can be applied to the elliptical deformation sealing of the radial section of a kiln body of a rotary kiln, and solves the problem that the sealing effect is poor or the sealing effect is poor due to deformation. The dynamic sealing device is composed of two layers of sealing components, wherein the first sealing component comprises: a plurality of first dynamic seal blocks 2 (using graphite seal blocks, see fig. 6) and a plurality of static seal blocks 14 (using graphite seal blocks); the second seal assembly includes: the plurality of second dynamic seal blocks 3, the tail parts of the first dynamic seal blocks and the second dynamic seal blocks have the functions of a first dynamic seal spring and a second dynamic seal spring 15 and 5 respectively, so that the first dynamic seal blocks and the second dynamic seal blocks are attached to the cylindrical surface of the rotary kiln body 9 (the rotary kiln body 9 is a rotary shaft, and the rotary kiln body 9 is taken as the rotary shaft for illustration in the embodiment); the second movable sealing block of the second sealing assembly 3 has the function of a compression spring 7 in the axial direction, so that the two layers of movable sealing blocks are tightly attached. The first dynamic seal block can slide on the guiding sealing surface of the annular base plate 10; the second dynamic seal block 3 can slide above the first dynamic seal block 2 and the guiding sealing surface of the second seal box 11. It should be noted that: because rotary kiln body 9 diameter is great, the total number of first movable seal piece, second movable seal piece is generally more than 150, when movable seal piece adopts graphite seal piece like this, the graphite seal piece size of monolithic is less, be difficult for cracked, and the indent radian of monolithic graphite seal piece front end is very big in practice (see fig. 6), be close to the straight line, also can understand and be close to a point, and because graphite is soft, the graphite seal piece that like this is more can better laminating with rotary kiln body 9, and have better shape compensation characteristic, can reach better sealed effect, the quantity of movable seal piece that is illustrated in each figure is less, the purpose is just in order to the position and the theory of operation of the movable seal piece that can make clear illustration.
When the rotary kiln body 9 is heated unevenly, the circular shape of the section of the kiln body becomes elliptical, and at the moment, the radial sliding of the two layers of dynamic sealing blocks is utilized to ensure that the dynamic sealing blocks are tightly attached to the rotary kiln body, so that the sealing effect is realized.
Specifically, when the rotary kiln is warmed up, the rotary kiln body 9 is changed into an elliptic cylinder shape from a cylinder shape, at the moment, the elliptic cylinder rotates by taking the previous rotation center as a rotation shaft, when a high point rotates to the first movable sealing block 2 of the first layer, the first movable sealing block 2 moves outwards, and at the moment, the first movable sealing block 2 still keeps close fit with the rotary kiln body 9 due to the action of the first movable sealing spring 15 behind the first movable sealing block 2; similarly, when the low point moves to the position of the second dynamic sealing block 3, the second dynamic sealing block 3 still keeps close fit with the kiln body 9 of the rotary kiln due to the action of the second dynamic sealing spring 5 behind the second dynamic sealing block 3; meanwhile, the axial compression spring 7 on the second dynamic seal block 3 acts, so that the second dynamic seal block 3 is tightly attached to the first dynamic seal block 2, and the elastic force of the two springs and the first dynamic seal block and the second dynamic seal block are regulated by regulating bolts (namely, the first dynamic seal regulating bolts 13 and the second dynamic seal regulating bolts 4) at the back of the first dynamic seal block and the second dynamic seal block, thereby achieving a good integral seal effect.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (5)
1. A dynamic seal for a rotary shaft in a non-uniform radial deformation condition, comprising:
An annular substrate, a first seal assembly, and a second seal assembly; wherein,
The center hole of the annular substrate is a through hole through which the rotary shaft passes;
the first sealing assembly is arranged on the annular substrate, is provided with a plurality of dynamic sealing elements and a plurality of static sealing elements which are arranged around the central hole of the annular substrate, and the elastic front sealing end of each dynamic sealing element and the front sealing end of each static sealing element face towards the central hole and can be attached and sealed on the surface of the rotary shaft penetrating through the central hole;
the second sealing assembly is arranged on the annular substrate, is provided with a plurality of dynamic sealing elements which are arranged around the central hole of the annular substrate, and the elastic front sealing ends of the dynamic sealing elements face the central hole and can be elastically attached and sealed on the surface of a rotary shaft penetrating through the central hole;
the plurality of dynamic sealing elements and the plurality of static sealing elements of the first sealing assembly are distributed around the central hole of the annular base plate in an annular shape, and are arranged in a mode that one dynamic sealing element and one static sealing element are alternately arranged;
each dynamic seal of the first seal assembly includes:
The device comprises a first sealing box body, a fixing bolt, a first dynamic sealing block, a first dynamic sealing spring and a first dynamic sealing adjusting bolt; wherein,
The first sealing box body is fixedly arranged on the annular substrate through a fixing bolt, and the front end opening of the first sealing box body faces to the central hole of the annular substrate;
the first dynamic sealing block is movably arranged in the first sealing box body, and the elastic front sealing end of the first dynamic sealing block is a concave arc-shaped surface matched with the surface of the rotary shaft;
The rear end of the first dynamic seal block in the first seal box body is provided with the first dynamic seal spring;
the first dynamic seal adjusting bolt is arranged at the rear end of the first seal box body, the front end of the first dynamic seal adjusting bolt stretches into the first seal box body to prop up the first dynamic seal spring, and the elastic force of the first dynamic seal block in the first seal box body in the radial direction can be adjusted through the first dynamic seal spring;
the second sealing component is positioned above the first sealing component and forms a double-layer sealing structure with the first sealing component;
Each dynamic seal of the second seal assembly includes:
The second sealing box body, the fixing bolt, the second dynamic sealing block, the axial compression spring, the axial compression block, the second dynamic sealing spring and the second dynamic sealing adjusting bolt; wherein,
The second sealing box body is arranged on the annular substrate through a fixing bolt, and the front end opening of the second sealing box body faces to the central hole of the annular substrate;
The second movable sealing block is movably arranged in the second sealing box body, and the elastic front sealing end of the second movable sealing block is a concave arc-shaped surface matched with the surface of the rotary shaft;
The second sealing box body is provided with the axial compression spring and the axial compression block, and can compress the second dynamic sealing block in the second sealing box body along the axial direction of the rotating shaft;
The rear end of the second dynamic seal block in the second seal box body is provided with the second dynamic seal spring;
The second dynamic seal adjusting bolt is arranged at the rear end of the second seal box body, the front end of the second dynamic seal adjusting bolt stretches into the second seal box body to prop against the second dynamic seal spring, and the elastic force of the second dynamic seal block in the second seal box body in the radial direction can be adjusted through the second dynamic seal spring;
Each static seal of the first seal assembly includes:
the sealing device comprises a fixed sealing box and a graphite sealing block which is arranged at the front end in the fixed sealing box and provided with a concave arc-shaped surface.
2. The dynamic seal assembly for a rotary shaft in a non-uniform radial deformation state of claim 1 wherein said first dynamic seal block is a graphite seal block having a concave arcuate surface at a forward end.
3. The dynamic seal assembly for a rotary shaft in a non-uniform radial deformation state of claim 1 wherein said second dynamic seal block is a graphite seal block having a concave arcuate surface at the front end.
4. The dynamic seal assembly for a rotary shaft in a non-uniform radial deformation condition of claim 1, wherein a total number of the plurality of dynamic seals of the first seal assembly and the plurality of static seals and the plurality of dynamic seals of the second seal assembly is not less than 150.
5. The dynamic seal assembly for a rotary shaft in a non-uniform radial deformation condition of claim 1 wherein said static seal employs a graphite seal block having a concave arcuate surface at the forward end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811088704.3A CN108916387B (en) | 2018-09-18 | 2018-09-18 | Dynamic sealing device for a rotary shaft in a non-uniform radial deformation state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811088704.3A CN108916387B (en) | 2018-09-18 | 2018-09-18 | Dynamic sealing device for a rotary shaft in a non-uniform radial deformation state |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108916387A CN108916387A (en) | 2018-11-30 |
| CN108916387B true CN108916387B (en) | 2024-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811088704.3A Active CN108916387B (en) | 2018-09-18 | 2018-09-18 | Dynamic sealing device for a rotary shaft in a non-uniform radial deformation state |
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| CN (1) | CN108916387B (en) |
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| CN106090232A (en) * | 2016-07-29 | 2016-11-09 | 湖南万容科技股份有限公司 | A kind of rotary kiln inner core rotary seal |
| CN206449200U (en) * | 2017-01-12 | 2017-08-29 | 河南东和环保科技股份有限公司 | A kind of wide arc gap huge revolving mechanism dynamic sealing means |
| CN107604969A (en) * | 2017-11-03 | 2018-01-19 | 三重机有限公司 | Center-rotary joint and hydraulic crawler excavator |
| CN107741151A (en) * | 2017-11-28 | 2018-02-27 | 河南昱千鑫金属科技有限公司 | A kind of totally-enclosed metallurgical rotary kiln |
| CN209370466U (en) * | 2018-09-18 | 2019-09-10 | 启迪桑德环境资源股份有限公司 | For dynamic sealing means of the rotating shaft in uneven radial deformation state |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108916387A (en) | 2018-11-30 |
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Address after: No. 114 along the River Road, Yichang, Hubei, Hubei Applicant after: Tus Environmental Technology Development Co.,Ltd. Address before: No. 114 along the River Road, Yichang, Hubei, Hubei Applicant before: SOUND ENVIRONMENTAL RESOURCES Co.,Ltd. |
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