CN214887245U - Steam turbine and tangential steam inlet structure thereof - Google Patents
Steam turbine and tangential steam inlet structure thereof Download PDFInfo
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- CN214887245U CN214887245U CN202120388466.9U CN202120388466U CN214887245U CN 214887245 U CN214887245 U CN 214887245U CN 202120388466 U CN202120388466 U CN 202120388466U CN 214887245 U CN214887245 U CN 214887245U
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- 238000007789 sealing Methods 0.000 claims description 45
- 210000002445 nipple Anatomy 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 4
- 238000009826 distribution Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000010030 laminating Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012271 agricultural production Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The utility model discloses a steam turbine and tangential admission structure thereof, tangential admission structure include outer cylinder and inner casing, the inner casing is equipped with the admission cavity, the outer cylinder with the inner casing is seted up the correspondence and is link up extremely the steam inlet of admission cavity, the steam inlet is seted up to two sets of, and is two sets of the steam inlet is followed the tangential setting of admission cavity, and two sets of the steam inlet branch is located the both sides of inner casing are 180 rotational symmetry settings. By adopting tangential steam inlet with two opposite sides, the rotation direction of steam flow entering the steam inlet chamber is consistent with the rotation direction of the rotor, the on-way resistance and the local resistance existing in the steam flow process are reduced, the steam inlet loss is reduced, and the unit efficiency is improved.
Description
Technical Field
The utility model relates to a steam turbine technical field, in particular to tangential admission structure. The utility model discloses still relate to a steam turbine that has this tangential admission structure.
Background
Steam turbines are widely used in the energy and power industry for driving generators to supply a large amount of electric energy or drive other power machines to meet the requirements of increasingly developed industrial and agricultural production. The steam turbines used in different occasions have different steam inlet parameters and different steam inlet structures. The method is distinguished according to a steam distribution mode and mainly comprises two types of pipeline regulation steam distribution for full-circumference steam admission and nozzle regulation steam distribution for partial steam admission. The steam inlet structure of the existing pipeline regulating steam distribution is shown in figure 1, the axis direction of a steam inlet of a unit is generally vertical to the horizontal central line of a steam turbine, and when new steam enters a steam inlet chamber 3 of a cylinder, the new steam directly impacts the inner wall of the steam inlet chamber 3 and forms vortex, so that the resistance of the steam flowing in the steam inlet chamber 3 is increased, and the steam inlet loss of the unit is increased.
Therefore, how to reduce the steam inlet loss and improve the unit efficiency becomes a technical problem to be solved by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a tangential admission structure can reduce the admission loss, improves unit efficiency. Another object of the present invention is to provide a steam turbine including the above tangential steam inlet structure.
In order to achieve the above object, the utility model provides a tangential admission structure, including outer cylinder and inner cylinder, the inner cylinder is equipped with the admission cavity, the outer cylinder with the inner cylinder is seted up and is corresponded link up extremely the steam inlet of admission cavity, the steam inlet is seted up for two sets ofly, and is two sets of the steam inlet is followed the tangential setting of admission cavity, and is two sets of the steam inlet branch is located the both sides of inner cylinder are 180 rotational symmetry settings.
Optionally, the steam inlet is provided with a steam inlet connecting pipe, a sealing assembly is arranged between the outer wall of the steam inlet connecting pipe and the inner cylinder, and the steam inlet connecting pipe is connected with the outer cylinder through a flange.
Optionally, the seal assembly includes the laminating the interior sealing ring that the admission was taken over and is set up and the laminating the inner casing the steam inlet sets up, the cross-section is the external seal ring of L type, interior sealing ring with the external seal ring is followed the radial in order to predetermine the clearance setting of admission was taken over.
Optionally, the sealing assembly further comprises a four-ring and a pressing ring which press against the outer sealing ring along the axial direction of the steam inlet connecting pipe.
Optionally, the inner seal rings and the outer seal rings are arranged in multiple groups in a one-to-one correspondence.
Optionally, the inner casing is provided with a support lug, and the outer casing is provided with a support portion cooperating with the support lug.
Optionally, the cross-sectional area of the steam inlet chamber tapers from one steam inlet to the other in the direction of steam flow.
The utility model also provides a steam turbine, including above-mentioned arbitrary tangential admission structure.
Compared with the prior art, the utility model provides a tangential admission structure includes outer cylinder and inner cylinder, the admission cavity is seted up to the inner cylinder, outer cylinder and inner cylinder are seted up two sets of correspondences and are link up the admission mouth to the admission cavity, the admission mouth sets up along the tangential of admission cavity, adopt the relative tangential admission in both sides, the direction of rotation that the steam flow got into the cylinder admission cavity is unanimous with rotor direction of rotation, it has on-way resistance and local resistance to reduce steam flow in-process, improve the flow characteristic of steam in the cylinder, the admission loss has been reduced, thereby the unit efficiency has been improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic view of a prior art steam intake structure;
fig. 2 is a schematic view of a tangential steam inlet structure provided in an embodiment of the present invention;
fig. 3 is an enlarged view of a portion a of fig. 2.
Wherein:
1-outer cylinder, 2-inner cylinder, 3-steam inlet chamber, 4-steam inlet connecting pipe, 5-inner sealing ring, 6-outer sealing ring, 7-four closing ring, 8-pressing ring and 9-supporting lug.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 2 and 3, fig. 2 is a schematic view of a tangential steam inlet structure according to an embodiment of the present invention, and fig. 3 is an enlarged view of a portion a of fig. 2.
The utility model provides a tangential admission structure includes outer casing 1 and inner casing 2, and the admission mouth link up to the admission cavity 3 of inner casing 2, and two sets of admission mouths adopt the relative tangential admission in both sides along the tangential setting of admission cavity 3, and the direction of rotation that the steam flow got into cylinder admission cavity 3 is unanimous with rotor direction of rotation, improves the flow characteristic of steam in the cylinder, has reduced the admission loss to unit efficiency has been improved.
Referring to fig. 2 and 3, the tangential steam inlet structure includes an inner cylinder 2 and an outer cylinder 1 of the cylinder, and the inner cylinder 2 is installed in the outer cylinder 1 by matching against four supporting lugs 9 of the horizontal middle section and the supporting part of the outer cylinder 1. The inner cylinder 2 and the outer cylinder 1 are provided with steam inlets which correspondingly penetrate through the steam inlet chamber 3 of the inner cylinder 2, the two groups of steam inlets are respectively arranged at the upper right side and the lower left side of the inner cylinder 2, the two groups of steam inlets are arranged in a 180-degree rotational symmetry manner, and any one group of steam inlets are arranged along the tangential direction of the steam inlet chamber 3 of the inner cylinder 2.
Through designing inner casing 2 for the tangential admission, for guaranteeing that the flow direction of admission chamber 3 steam is unanimous with the direction of rotation of steam turbine rotor, the steam inlet design of first half jar is on the right side, the admission design of second half jar is on the left side, new steam inner casing 2 back, the steam flow is anticlockwise rotatory in admission chamber 3, it is unanimous with the direction of rotation of steam turbine rotor, improve the flow characteristic of steam in admission chamber 3, the admission loss has been reduced, thereby the unit efficiency has been improved.
Further, the tangential steam inlet structure provided by the application comprises a steam inlet connecting pipe 4 assembled at the steam inlet, and a sealing assembly arranged between the outer wall of the steam inlet connecting pipe 4 and the inner wall of the steam inlet of the inner cylinder 2. Referring to fig. 2, the steam inlet connecting pipe 4 is rigidly connected to the outer cylinder 1 through a flange, and the sealing assembly is disposed at the steam inlet of the steam inlet connecting pipe 4 extending into the inner cylinder 2. As shown in fig. 3, the sealing assembly specifically includes an inner sealing ring 5 attached to the outer wall of the steam inlet connecting pipe 4 and an outer sealing ring 6 attached to the inner wall of the steam inlet of the inner cylinder 2, the inner sealing rings 5 are uniformly arranged at intervals along the axial direction of the steam inlet connecting pipe 4, and the outer sealing rings 6 and the inner sealing rings 5 are arranged in a one-to-one correspondence manner.
The section of the inner sealing ring 5 is rectangular, and the section of the outer sealing ring 6 is L-shaped, namely comprises an outer ring and an inner ring; the inner ring of the outer sealing ring 6 is attached to the inner sealing ring 5 along the axial direction of the steam inlet connecting pipe 4 to play a role in steam inlet sealing; the outer ring of the outer sealing ring 6 is attached to the inner wall of the steam inlet of the inner cylinder 2, and is arranged at a preset gap with the inner sealing ring 5 along the outer diameter direction of the steam inlet connecting pipe 4. Thereby ensuring that the expansion allowance is formed when the steam inlet connecting pipe 4 is heated and expanded and flows out when high-temperature and high-pressure steam is introduced.
The inner sealing ring 5 and the steam inlet connecting pipe 4 are in interference fit, the outer sealing ring 6 and the inner wall of the steam inlet of the inner cylinder 2 are in interference fit, in order to improve the reliability of the assembly of the inner sealing ring 5 and the outer sealing ring 6, the sealing assembly further comprises a four-way ring 7 and a pressing ring 8, the four-way ring abuts against the inner sealing ring 5 and the outer sealing ring 6 along the axial direction of the steam inlet connecting pipe 4, and the pressing ring 8 is fixed on the inner cylinder 2 through bolts. The new steam passes through the outer cylinder 1 through the steam inlet connecting pipe 4 and directly enters the inner cylinder 2, when the steam inlet connecting pipe 4 is inserted, the inner sealing ring 5 is tightly matched with the steam inlet connecting pipe 4, the outer sealing ring 6 is tightly matched with the inner cylinder 2 so as to achieve the sealing effect, and meanwhile, an expansion gap is designed between the inner sealing ring 6 and the outer sealing ring 6 so as to ensure the thermal expansion of the steam inlet connecting pipe 4.
Preferably, the steam inlet chamber 3 is provided with a variable cross section, that is, the flow areas of the cross sections at different positions along the vertical circumference are different, and the flow area is gradually reduced from one steam inlet to the other steam inlet along the flow direction of the steam, that is, the flow area of the steam inlet chamber 3 is reduced from the steam inlet at the upper right side to the steam inlet at the lower left side in fig. 2 along the counterclockwise direction, and the flow area of the steam inlet chamber 3 is reduced from the steam inlet at the lower left side to the steam inlet at the upper right side along the counterclockwise direction. Through designing into the inner chamber form of variable cross section with steam admission chamber 3, guarantee that the velocity of flow of each cross section steam of steam admission chamber 3 is unanimous, greatly reduced the resistance loss of steam in steam admission chamber 3, efficiency in the complete machine is effectively improved.
The utility model also provides a steam turbine, including the tangential admission structure that embodiment described, still include steam turbine rotor, movable blade, quiet leaf, front and back gland sealing etc. other parts of steam turbine can refer to prior art, and this paper no longer expandes.
It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The steam turbine and the tangential steam inlet structure thereof provided by the utility model are introduced in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (8)
1. The utility model provides a tangential admission structure, its characterized in that, includes outer cylinder (1) and inner cylinder (2), inner cylinder (2) are equipped with admission cavity (3), outer cylinder (1) with inner cylinder (2) are seted up the correspondence and are link up extremely the steam inlet of admission cavity (3), the steam inlet is seted up for two sets ofly, two sets of the steam inlet is followed the tangential setting of admission cavity (3), and two sets of the steam inlet branch is located the both sides of inner cylinder (2) are 180 rotational symmetry and set up.
2. The tangential steam inlet structure of claim 1, characterized in that the steam inlet is provided with a steam inlet connecting pipe (4), a sealing component is arranged between the outer wall of the steam inlet connecting pipe (4) and the inner cylinder (2), and the steam inlet connecting pipe (4) is connected with the outer cylinder (1) through a flange.
3. The tangential steam inlet structure according to claim 2, characterized in that the sealing assembly comprises an inner sealing ring (5) attached to the steam inlet connecting pipe (4) and an outer sealing ring (6) attached to the steam inlet of the inner cylinder (2) and having an L-shaped cross section, wherein the inner sealing ring (5) and the outer sealing ring (6) are arranged with a preset gap along the radial direction of the steam inlet connecting pipe (4).
4. The tangential steam admission structure according to claim 3, characterized in that the sealing assembly further comprises a four-ring (7) and a pressure ring (8) which press against the outer sealing ring (6) in the axial direction of the steam admission nipple (4).
5. The tangential steam admission structure according to claim 3, characterized in that the inner sealing rings (5) and the outer sealing rings (6) are arranged in groups in a one-to-one correspondence.
6. The tangential steam admission structure according to claim 4, characterized in that the inner cylinder (2) is provided with a supporting lug (9) and the outer cylinder (1) is provided with a support cooperating with the supporting lug (9).
7. The tangential steam entry structure according to any one of claims 1 to 6, wherein the cross-sectional area of the steam entry chamber (3) tapers from one steam entry port to the other in the direction of steam flow.
8. A steam turbine comprising the tangential steam admission structure of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120388466.9U CN214887245U (en) | 2021-02-22 | 2021-02-22 | Steam turbine and tangential steam inlet structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120388466.9U CN214887245U (en) | 2021-02-22 | 2021-02-22 | Steam turbine and tangential steam inlet structure thereof |
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| Publication Number | Publication Date |
|---|---|
| CN214887245U true CN214887245U (en) | 2021-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120388466.9U Active CN214887245U (en) | 2021-02-22 | 2021-02-22 | Steam turbine and tangential steam inlet structure thereof |
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| CN (1) | CN214887245U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115405377A (en) * | 2022-08-29 | 2022-11-29 | 中国船舶重工集团公司第七0三研究所 | Multi-valve throttling adjusting device of marine steam turbine |
-
2021
- 2021-02-22 CN CN202120388466.9U patent/CN214887245U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115405377A (en) * | 2022-08-29 | 2022-11-29 | 中国船舶重工集团公司第七0三研究所 | Multi-valve throttling adjusting device of marine steam turbine |
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