CN215445057U - Sealing structure for coordinating radial rotating shaft to thermal deformation - Google Patents
Sealing structure for coordinating radial rotating shaft to thermal deformation Download PDFInfo
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- CN215445057U CN215445057U CN202120280692.5U CN202120280692U CN215445057U CN 215445057 U CN215445057 U CN 215445057U CN 202120280692 U CN202120280692 U CN 202120280692U CN 215445057 U CN215445057 U CN 215445057U
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- air inlet
- graphite packing
- volute
- rectifying section
- sealing
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Abstract
The utility model discloses a sealing structure for coordinating thermal deformation of a radial rotating shaft, which comprises an air inlet rectifying section, wherein two ends of the air inlet rectifying section are connected with an air inlet volute, the air inlet volute is connected with an air inlet pipeline, a sealing coordination assembly is arranged at the joint of the air inlet rectifying section and the air inlet volute and comprises a first graphite packing, a first pressing ring, a second graphite packing and a second pressing ring, a first annular groove is formed in the flange of the air inlet volute, the first graphite packing is arranged in the first annular groove, and the first pressing ring is rigidly connected with the air inlet volute through a first connecting piece and presses the first graphite packing axially. The graphite packing in the utility model realizes good sealing effect, can absorb larger axial movement and certain radial movement, saves parts such as expansion joints and the like, has simple integral structure and reduces cost.
Description
Technical Field
The utility model relates to the technical field of gas path sealing, in particular to a sealing structure for thermal deformation coordination of a radial rotating shaft.
Background
On the complete machine or component test bed of an aeroengine, a gas turbine and the like, a gas path pipeline and an air inlet and exhaust volute are indispensable parts, and the problems of sealing, connection and deformation coordination among the components such as the pipeline, the volute and the like follow. The sealing belongs to the field of static sealing work, and in general use, the following methods are commonly used for sealing: the O-shaped rubber ring sealing, the sealing gasket sealing, the lapping surface sealing and the sealant sealing are performed, the common property of all the sealing is that the connection of the sealing part is rigid connection, and if deformation is inconsistent on two sides of the sealing, structures for absorbing deformation such as expansion joints are additionally arranged, so that the whole structure tends to be complex.
On the complete machine or component test bed of an aeroengine, a gas turbine and the like, because the size of structures such as a volute, a chamber and the like is large, the thermal deformation is usually more than a millimeter level, and the traditional rigid connection generates huge thermal stress, so that the conditions of material failure, serious leakage, structural damage and the like are caused.
In the traditional form, the expansion joint of the corrugated pipe is the most common form, the expansion joint of the corrugated pipe occupies a large size and is high in price, and the heated expansion joint can generate thermal stress to react on a test piece or a machine set, so that the sealing performance is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems in the prior art and provide a sealing structure for coordinating the thermal deformation of a radial rotating shaft, which has the advantages of reasonable structure, low manufacturing cost and excellent sealing performance.
In order to achieve the above and other related objects, the present invention provides a sealing structure for coordinating thermal deformation of a radial rotating shaft, including an air inlet rectifying section, both ends of the air inlet rectifying section are connected to an air inlet volute, the air inlet volute is connected to an air inlet pipeline, a sealing coordination assembly is disposed at a connection position of the air inlet rectifying section and the air inlet volute, the sealing coordination assembly includes a first graphite packing, a first clamp ring, a second graphite packing and a second clamp ring, a first annular groove is disposed at a flange of the air inlet volute, the first graphite packing is mounted in the first annular groove, the first clamp ring is rigidly connected to the air inlet volute through a first connecting member and axially compresses the first graphite packing, a second annular groove is disposed at the flange of the air inlet rectifying section, the second clamp ring is mounted in the second annular groove, the second compression ring is rigidly connected with the air inlet rectifying section through a second connecting piece and compresses the second graphite packing along the axial direction.
Preferably, the first connecting piece and the second connecting piece are both bolts and nuts.
Preferably, after the first graphite packing is axially compressed, the first graphite packing is tightly attached to the first matching cylindrical surface of the air inlet rectifying section in the radial direction.
Preferably, after the second graphite packing is axially compressed, the second graphite packing is tightly attached to the second matching cylindrical surface of the air inlet volute in the radial direction and the reverse direction.
Preferably, the outlet end of the air inlet rectifying section is connected with a testing device.
Compared with the prior art, the utility model has the beneficial effects that: through setting up sealed coordination subassembly, adopt an axial sliding structure, flexible graphite packing has realized when good sealed effect, can absorb great axial float and certain radial float, has saved parts such as expansion joint, makes device overall structure simple, the cost is reduced.
Drawings
The utility model is described in further detail below with reference to specific embodiments and with reference to the following drawings.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a seal coordinating assembly according to the present invention.
Wherein the reference numerals are specified as follows: the air inlet rectifying section 1, the outlet end 101, the air inlet volute 2, the air inlet pipeline 3, the sealing coordination assembly 4, a first graphite packing 411, a first annular groove 412, a first compression ring 413, a first connecting piece 414, a first matching cylindrical surface 415, a second graphite packing 421, a second annular groove 422, a second compression ring 423, a second connecting piece 424 and a second matching cylindrical surface 425.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be apparent to those skilled in the art from the disclosure herein.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the present disclosure, and are not used to limit the conditions and conditions of the present disclosure, so that the present disclosure is not technically significant, and any structural modifications, ratio changes or size adjustments should still fall within the scope of the present disclosure without affecting the efficacy and the achievable purpose of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
As shown in fig. 1 and fig. 2, the present invention provides a sealing structure for coordinating thermal deformation of a radial rotating shaft, including an air inlet rectifying section 1, both ends of the air inlet rectifying section 1 are connected to an air inlet volute 2, the air inlet volute 2 is connected to an air inlet pipeline 3, a sealing coordinating component 4 is disposed at the connection between the air inlet rectifying section 1 and the air inlet volute 2, the sealing coordinating component 4 includes a first graphite packing 411, a first clamp ring 413, a second graphite packing 421 and a second clamp ring 423, a first annular groove 412 is disposed at the flange of the air inlet volute 2, the first graphite packing 411 is mounted in the first annular groove 412, the first clamp ring 413 is rigidly connected to the air inlet volute 2 through a first connecting piece 414 and presses the first graphite packing 411 axially, a second annular groove 422 is disposed at the flange of the air inlet rectifying section 1, the second clamp ring 423 is mounted in the second annular groove 422, the second compression ring 423 is rigidly connected with the intake rectifying section 1 through the second connecting piece 424, and compresses the second graphite packing 421 in the axial direction.
The first connecting member 414 and the second connecting member 424 are both bolts and nuts.
Wherein, because graphite packing itself has certain flexibility, when first graphite packing 411 is receiving the axial to compress tightly the back, it hugs closely with the first cooperation face of cylinder 415 of the rectification section 1 that admits air in radial direction to realize sealed.
After the second graphite packing 421 is compressed axially, it is tightly attached to the second fitting cylindrical surface 425 of the inlet volute 2 in the radial direction and the reverse direction.
Wherein, the outlet end 101 of the air inlet rectifying section 1 is connected with a test device.
In this embodiment, the specific test conditions are as follows: the air inlet temperature is 700K, the flow rate is 4kg/s, and the pressure is 0.3 MPa. After flowing in from the air inlet pipeline 3, the gas enters the air inlet volute 2 and then flows into the test piece through the air inlet rectifying section 1. The air inlet volute 2 is rigidly connected with the air inlet pipeline 3, and the air inlet rectifying section 1 is rigidly connected with the test piece. In the running process of the test piece, the air inlet pipeline 3 and the air inlet volute 2 are kept relatively static, and the air inlet rectifying section 1 and the test piece axially float towards one side of the air inlet volute 2. The inlet rectifying section 1 and the inlet volute 2 cannot be rigidly connected to avoid accidents caused by excessive stress. In addition, in order to ensure the efficiency of the whole device, a sealing device is required to be arranged between the air inlet volute 2 and the air inlet rectifying section 1, so that the loss caused by leakage is reduced. The seal coordinating assembly 4 must therefore compromise both the sealing and the coordinating of the relative displacements, in particular: the graphite packing has certain flexibility, and after the graphite packing is axially compressed, the graphite packing is tightly attached to the corresponding first matching cylindrical surface 415 and the second matching cylindrical surface 425 in the radial direction, so that sealing is realized. In the experimental process, the graphite packing is static relative to the air inlet volute 2, the air inlet rectifying section 1 axially slides relative to the air inlet volute 2, and two sides of the graphite packing are always kept in close contact with each other. Because the graphite packing has certain flexibility, the radial movement of the air inlet rectifying section 1 relative to the air inlet volute 2 can be absorbed by the graphite packing.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.
Claims (5)
1. The sealing structure for the coordination of the radial rotating shaft to the thermal deformation comprises an air inlet rectification section (1), wherein two ends of the air inlet rectification section (1) are connected with an air inlet volute (2), the air inlet volute (2) is connected with an air inlet pipeline (3), and is characterized in that a sealing coordination assembly (4) is arranged at the joint of the air inlet rectification section (1) and the air inlet volute (2), the sealing coordination assembly (4) comprises a first graphite packing (411), a first compression ring (413), a second graphite packing (421) and a second compression ring (423), a first annular groove (412) is arranged at the flange of the air inlet volute (2), the first graphite packing (411) is installed in the first annular groove (412), the first compression ring (413) is rigidly connected with the air inlet volute (2) through a first connecting piece (414) and compresses the first graphite packing (411) along the axial direction, the flange department of the air inlet rectifying section (1) is provided with a second annular groove (422), a second compression ring (423) is installed in the second annular groove (422), and the second compression ring (423) is rigidly connected with the air inlet rectifying section (1) through a second connecting piece (424) and compresses a second graphite packing (421) along the axial direction.
2. A seal arrangement for thermal deformation coordination of a radially oriented shaft as set forth in claim 1, wherein: the first connector (414) and the second connector (424) are both bolts and nuts.
3. A seal arrangement for thermal deformation coordination of a radially oriented shaft as set forth in claim 1, wherein: after the first graphite packing (411) is axially compressed, the first graphite packing is tightly attached to a first matching cylindrical surface (415) of the air inlet rectifying section (1) in the radial direction.
4. A seal arrangement for thermal deformation coordination of a radially oriented shaft as set forth in claim 1, wherein: after the second graphite packing (421) is axially compressed, the second graphite packing is tightly attached to a second matching cylindrical surface (425) of the air inlet volute (2) in a radial direction and a reverse direction.
5. A seal arrangement for thermal deformation coordination of a radially oriented shaft as set forth in claim 1, wherein: and the outlet end (101) of the air inlet rectifying section (1) is connected with a test device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120280692.5U CN215445057U (en) | 2021-02-01 | 2021-02-01 | Sealing structure for coordinating radial rotating shaft to thermal deformation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120280692.5U CN215445057U (en) | 2021-02-01 | 2021-02-01 | Sealing structure for coordinating radial rotating shaft to thermal deformation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215445057U true CN215445057U (en) | 2022-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120280692.5U Active CN215445057U (en) | 2021-02-01 | 2021-02-01 | Sealing structure for coordinating radial rotating shaft to thermal deformation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215445057U (en) |
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2021
- 2021-02-01 CN CN202120280692.5U patent/CN215445057U/en active Active
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