CN214787571U - Up-down split type low-pressure inner cylinder for steam turbine - Google Patents
Up-down split type low-pressure inner cylinder for steam turbine Download PDFInfo
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- CN214787571U CN214787571U CN202121329546.3U CN202121329546U CN214787571U CN 214787571 U CN214787571 U CN 214787571U CN 202121329546 U CN202121329546 U CN 202121329546U CN 214787571 U CN214787571 U CN 214787571U
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Abstract
The utility model provides a split type steam turbine is with low pressure inner cylinder from top to bottom, includes upper cylinder body, lower cylinder body, a set of row of gas cylinder, two symmetrical lower gas cylinders that set up, a set of interior wallboard and a set of upper and lower cylinder body coupling assembling, welded connection between upper cylinder body and the lower cylinder body, be equipped with a set of upper and lower cylinder body coupling assembling on the lower cylinder body is close to the tip of upper cylinder body, a set of upper and lower cylinder body coupling assembling and upper cylinder body coupling assembling. The lower pressure inner cylinder for the upper and lower split type steam turbine is convenient to process and transport through the structure of the upper and lower split type cylinder bodies, and the low pressure inner cylinder has enough connection rigidity due to the matching design of the plurality of middle wall plates and the reinforcing rib plates; in addition, a plurality of upper and lower cylinder body coupling assembling that set up between upper cylinder body and lower cylinder body cooperate the welded structure between upper cylinder body and the lower cylinder body for have better assembly strength and rigidity between upper cylinder body and the lower cylinder body, guaranteed that the low pressure inner casing has good overall dimension, accord with the operation requirement of steam turbine.
Description
Technical Field
The utility model belongs to the technical field of super-huge special component forming process, specifically, relate to an upper and lower split type low pressure inner casing for steam turbine.
Background
The low pressure cylinder is similar to the high pressure cylinder and the intermediate pressure cylinder and is an important component of the steam turbine, and when the steam turbine converts the heat energy of high-temperature steam into mechanical energy rotating at high speed and drives the generator to cut magnetic lines of force and convert the magnetic energy into electric energy.
First of all, in order to reduce the asymmetrical deformation of the internal cylinder in the construction of conventional low-pressure internal cylinders, the two internal cylinder parts must in principle not be fixed by means of laterally projecting flanges which are bolted to one another, but are fixed to one another by means of clamping rings which lock the internal cylinder parts which are stacked together from the outside. However, the costs required for this are relatively high, and in particular the subsequent removal of the locking ring becomes very difficult.
In addition, the conventional low pressure inner cylinder arrangement is such that the inner cylinder sits on the outer cylinder. On one hand, the low-pressure outer cylinder is of a steel plate welding structure, so that the rigidity of the cylinder is poor, and the unit is easy to deform after long-term operation; on the other hand, the inner cylinder is located on the outer cylinder, and the center of the low-pressure inner cylinder is deviated due to the influence of vacuum force and thermal expansion of the outer cylinder, so that the dynamic and static gaps of the unit are irregularly changed, and the stability and the safety of the unit operation are influenced.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model aims at providing a split type for steam turbine low pressure inner casing from top to bottom has solved the problem of the low pressure inner casing locking connection difficulty among the prior art.
The technical scheme is as follows: the utility model provides an upper and lower split type low pressure inner cylinder for steam turbine, which comprises an upper cylinder body, a lower cylinder body, a group of upper exhaust cylinders, two symmetrically arranged lower exhaust cylinders, a group of inner wall plates and a group of upper and lower cylinder body connecting components, wherein the cross sections of the upper cylinder body and the lower cylinder body are semicircular, the upper cylinder body and the lower cylinder body are buckled together to form a cylindrical low pressure inner cylinder, the inner walls of the upper cylinder body and the lower cylinder body are respectively provided with a group of inner wall plates, the group of upper exhaust cylinders are fixedly arranged on the outer wall of the upper cylinder body and are communicated with the inside of the upper cylinder body, the two symmetrically arranged lower exhaust cylinders are fixedly arranged on the outer wall of the lower cylinder body, the two symmetrically arranged lower exhaust cylinders are communicated with the inside of the lower cylinder body, the upper cylinder body is welded with the lower cylinder body, the lower cylinder body is provided with a group of upper and lower cylinder body connecting components on the end part close to the upper cylinder body, the upper cylinder body and the lower cylinder body connecting assembly are connected with the upper cylinder body. The utility model discloses a split type steam turbine is with low pressure inner casing from top to bottom through adding between two sections last cylinder bodies and lower cylinder body and establishing a set of upper and lower cylinder body coupling assembling, can be under the great low pressure inner casing atress circumstances of size, through a set of upper and lower cylinder body coupling assembling improve the cylinder body and down the joint strength between the cylinder body, prolong the life of low pressure inner casing.
Further, in the lower-pressure inner cylinder for the upper and lower split type steam turbine, a group of inner wall plates on the inner wall of the upper cylinder body and a group of inner wall plates on the inner wall of the lower cylinder body are arranged in pairs, the sections of the inner wall plates are semicircular, and the inner wall plates on the inner wall of the upper cylinder body and the corresponding inner wall plates on the inner wall of the lower cylinder body form a circular ring shape.
Further, according to the upper and lower split type low-pressure inner cylinder for the steam turbine, the reinforcing rib plates are arranged between the group of inner wall plates on the inner wall of the upper cylinder body, and the reinforcing rib plates are arranged between the group of inner wall plates on the inner wall of the lower cylinder body.
Further, foretell split type for steam turbine low pressure inner cylinder from top to bottom, be equipped with a set of upper half piece on the terminal surface of upper cylinder body, be equipped with a set of lower half piece on the terminal surface of lower cylinder body, a set of upper half piece and a set of lower half piece one-to-one set up, be equipped with upper and lower cylinder body coupling assembling on the lower half piece, upper and lower cylinder body coupling assembling and upper half piece are connected.
Further, foretell split type steam turbine is with low pressure inner casing from top to bottom, upper and lower cylinder body coupling assembling includes U type backup pad, round pin axle, double-screw bolt, spring, compression sleeve and knob, U type backup pad is fixed to be set up on the outer wall of hough block down, the round pin axle sets up in U type backup pad, the lower tip cover of double-screw bolt is established at the round pin epaxially to the lower tip of double-screw bolt is located the U type inslot of U type backup pad, spring and compression sleeve all overlap and are established on the double-screw bolt, and the spring is located between round pin axle and the compression sleeve, the upper end threaded connection of knob and double-screw bolt, compression sleeve can be pressed with the up end of last hough block and hug closely to close
Furthermore, according to the upper and lower split type low-pressure inner cylinder for the steam turbine, a sharp corner is arranged on the lower end face of the compression sleeve close to one end of the upper half block, a groove is arranged on the upper end face of the upper half block, and the sharp corner is arranged in the groove.
Furthermore, the sections of the sharp corners and the grooves of the low-pressure inner cylinder for the vertically split steam turbine are triangular.
Further, a sealing gasket is arranged between the upper half block and the lower half block.
Above-mentioned technical scheme can find out, the utility model discloses following beneficial effect has: the lower-pressure inner cylinder for the upper and lower split type steam turbine is convenient to process and transport through the structure of the upper and lower split type upper cylinder body and the lower cylinder body, and the inner walls of the upper cylinder body and the lower cylinder body are provided with a plurality of middle wall plates and reinforcing rib plates in a matching design, so that the low-pressure cylinder has enough connection rigidity, the connection is completed through welding, and the compactness of a welding seam is ensured through welding of multiple parts; in addition, a plurality of upper and lower cylinder body coupling assembling that set up between upper cylinder body and lower cylinder body cooperate the welded structure between upper cylinder body and the lower cylinder body for have better assembly strength and rigidity between upper cylinder body and the lower cylinder body, guaranteed that the low pressure inner casing has good overall dimension, accord with the operation requirement of steam turbine.
Drawings
FIG. 1 is a schematic structural view of a first embodiment of a low-pressure inner cylinder for a vertically split steam turbine according to the present invention;
FIG. 2 is a front view of a first embodiment of a low-pressure inner casing for a vertically split steam turbine according to the present invention;
FIG. 3 is a left side view of a first embodiment of a low-pressure inner casing for a vertically split steam turbine according to the present invention;
FIG. 4 is a schematic structural view of a second embodiment of a low-pressure inner cylinder for a vertically split steam turbine according to the present invention;
fig. 5 is a partially enlarged view of a portion a in fig. 4 according to the present invention.
In the figure: the device comprises an upper cylinder body 1, an upper half block 11, a groove 111, a lower half block 12, a lower cylinder body 2, an upper gas discharge cylinder 3, two symmetrically arranged lower gas discharge cylinders 4, an inner wall plate 5, a reinforcing rib plate 51, an upper and lower cylinder body connecting assembly 6, a U-shaped supporting plate 61, a pin shaft 62, a stud 63, a spring 64, a pressing sleeve 65, a knob 66, a sharp corner 67 and a sealing gasket 68.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Example one
The low-pressure inner cylinder for the steam turbine of the upper and lower split type as shown in fig. 1-3 comprises an upper cylinder body 1, a lower cylinder body 2, a group of upper exhaust cylinders 3, two symmetrically arranged lower exhaust cylinders 4, a group of inner wall plates 5 and a group of upper and lower cylinder body connecting components 6, wherein the sections of the upper cylinder body 1 and the lower cylinder body 2 are both semicircular, the upper cylinder body 1 and the lower cylinder body 2 are buckled together to form a cylindrical low-pressure inner cylinder, the inner walls of the upper cylinder body 1 and the lower cylinder body 2 are both provided with a group of inner wall plates 5, the group of upper exhaust cylinders 3 are fixedly arranged on the outer wall of the upper cylinder body 1, the group of upper exhaust cylinders 3 are communicated with the inside of the upper cylinder body 1, the two symmetrically arranged lower exhaust cylinders 4 are fixedly arranged on the outer wall of the lower cylinder body 2, the two symmetrically arranged lower exhaust cylinders 4 are communicated with the inside of the lower cylinder body 2, and the upper cylinder body 1 is welded with the lower cylinder body 2, the end part of the lower cylinder body 2 close to the upper cylinder body 1 is provided with a group of upper and lower cylinder body connecting assemblies 6, and the upper and lower cylinder body connecting assemblies 6 are connected with the upper cylinder body 1. Go up cylinder body 1 and lower cylinder body 2 welding back together, through a set of cylinder body coupling assembling 6 from top to bottom with the edge part position that cylinder body 1 and lower cylinder body 2 are connected locks to at the atress deformation in-process, a set of cylinder body coupling assembling 6 from top to bottom can bear some pressure, alleviates the power between cylinder body 1 and the lower cylinder body 2, avoids going up the deformation fracture between cylinder body 1 and the lower cylinder body 2.
The inner wall plates 5 on the inner wall of the upper cylinder body 1 and the inner wall plates 5 on the inner wall of the lower cylinder body 2 are arranged oppositely pairwise, the cross sections of the inner wall plates 5 are semicircular, and the inner wall plates 5 on the inner wall of the upper cylinder body 1 and the corresponding inner wall plates 5 on the inner wall of the lower cylinder body 2 form a circular ring shape. And a reinforcing rib plate 51 is arranged between a group of inner wall plates 5 on the inner wall of the upper cylinder body 1, and a reinforcing rib plate 51 is arranged between a group of inner wall plates 5 on the inner wall of the lower cylinder body 2.
A set of rings that a set of interior wall board 5 on 1 inner wall of upper cylinder body and a set of interior wall board 5 on 2 inner walls of lower cylinder body are two liang of opposite formation are concentric circle structure to this set of concentric rings sets up along upper cylinder body 1 and 2 axis direction of lower cylinder body, and concentric rings reduces from one end to other end radius along upper cylinder body 1 and 2 axis direction of lower cylinder body gradually.
Example two
As shown in fig. 4 and 5, a set of upper half blocks 11 is arranged on the end surface of the upper cylinder body 1, a set of lower half blocks 12 is arranged on the end surface of the lower cylinder body 2, the set of upper half blocks 11 and the set of lower half blocks 12 are arranged in a one-to-one correspondence manner, upper and lower cylinder body connecting assemblies 6 are arranged on the lower half blocks 12, and the upper and lower cylinder body connecting assemblies 6 are connected with the upper half blocks 11.
In the structure, the upper and lower cylinder connecting assembly 6 comprises a U-shaped supporting plate 61, a pin shaft 62, a stud 63, a spring 64, a pressing sleeve 65 and a knob 66, the U-shaped supporting plate 61 is fixedly arranged on the outer wall of the lower half block 12, the pin shaft 62 is arranged on the U-shaped supporting plate 61, the lower end part of the stud 63 is sleeved on the pin shaft 62, and the lower end of the stud 63 is positioned in the U-shaped groove of the U-shaped support plate 61, the spring 64 and the pressing sleeve 65 are sleeved on the stud 63, and a spring 64 is located between the pin 62 and the compression sleeve 65, the knob 66 is threaded onto the upper end of the stud 63, the pressing sleeve 65 can be pressed against the upper end surface of the upper half block 11, a closed angle 67 is arranged on the lower end surface of the pressing sleeve 65 close to one end of the upper half block 11, the upper end face of the upper half block 11 is provided with a groove 111, and the sharp corner 67 is arranged in the groove 111. And the cross section of the sharp corner 67 and the cross section of the groove 111 are both triangular. A sealing gasket 68 is arranged between the upper half block 11 and the lower half block 12.
The upper half block 11 and the corresponding lower half block 12 are overlapped together, the stud 63 is rotated to enable the pressing sleeve 65 to be located on one side of the upper half block 11, the knob 66 is screwed clockwise, the knob 66 is gradually screwed into the stud 63, meanwhile, the knob 66 pushes the pressing sleeve 65 to move towards the upper half block 11, the spring 64 is gradually compressed in the process until the sharp corner 67 is pressed into the groove 111, and therefore the upper half block 11 and the lower half block 12 are pressed together.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications can be made without departing from the principles of the present invention, and these modifications should also be regarded as the protection scope of the present invention.
Claims (8)
1. The utility model provides a split type turbine is with low pressure inner casing from top to bottom which characterized in that: the cylinder comprises an upper cylinder body (1), a lower cylinder body (2), a group of upper exhaust cylinders (3), two symmetrically arranged lower exhaust cylinders (4), a group of inner wall plates (5) and a group of upper and lower cylinder body connecting components (6), wherein the sections of the upper cylinder body (1) and the lower cylinder body (2) are semicircular, the upper cylinder body (1) and the lower cylinder body (2) are buckled together to form a cylindrical low-pressure inner cylinder, the inner walls of the upper cylinder body (1) and the lower cylinder body (2) are respectively provided with a group of inner wall plates (5), the group of upper exhaust cylinders (3) are fixedly arranged on the outer wall of the upper cylinder body (1), the group of upper exhaust cylinders (3) are communicated with the inner part of the upper cylinder body (1), the two symmetrically arranged lower exhaust cylinders (4) are fixedly arranged on the outer wall of the lower cylinder body (2), and the two symmetrically arranged lower exhaust cylinders (4) are communicated with the inner part of the lower cylinder body (2), go up welded connection between cylinder body (1) and lower cylinder body (2), be equipped with a set of upper and lower cylinder body coupling assembling (6) on the tip that lower cylinder body (2) are close to last cylinder body (1), a set of upper and lower cylinder body coupling assembling (6) are connected with last cylinder body (1).
2. The vertically split low-pressure inner casing for steam turbines according to claim 1, wherein: go up a set of interior wallboard (5) on cylinder body (1) inner wall and a set of interior wallboard (5) on lower cylinder body (2) inner wall two liang just to setting up, the cross-section of interior wallboard (5) is semicircle annular, go up interior wallboard (5) on cylinder body (1) inner wall and corresponding interior wallboard (5) formation ring shape on lower cylinder body (2) inner wall.
3. The vertically split low-pressure inner casing for steam turbines according to claim 2, wherein: and a reinforcing rib plate (51) is arranged between a group of inner wall plates (5) on the inner wall of the upper cylinder body (1), and a reinforcing rib plate (51) is arranged between a group of inner wall plates (5) on the inner wall of the lower cylinder body (2).
4. The vertically split low-pressure inner casing for steam turbines according to claim 1, wherein: go up and be equipped with a set of upper half piece (11) on the terminal surface of cylinder body (1), be equipped with a set of lower half piece (12) on the terminal surface of lower cylinder body (2), a set of upper half piece (11) and a set of lower half piece (12) one-to-one set up, be equipped with upper and lower cylinder body coupling assembling (6) down on lower half piece (12), upper and lower cylinder body coupling assembling (6) are connected with upper half piece (11).
5. The vertically split low-pressure inner casing for steam turbines according to claim 4, wherein: upper and lower cylinder body coupling assembling (6) include U type backup pad (61), round pin axle (62), double-screw bolt (63), spring (64), compress tightly sleeve (65) and knob (66), U type backup pad (61) is fixed to be set up on the outer wall of hough block (12) down, round pin axle (62) set up on U type backup pad (61), the lower tip cover of double-screw bolt (63) is established on round pin axle (62), and the lower tip of double-screw bolt (63) is located the U type inslot of U type backup pad (61), spring (64) and compress tightly sleeve (65) and all establish on double-screw bolt (63), and spring (64) are located between round pin axle (62) and compress tightly sleeve (65), the upper end threaded connection of knob (66) and double-screw bolt (63), compress tightly sleeve (65) can be hugged closely with the up end face pressfitting of last husband block (11).
6. The vertically split low-pressure inner casing for steam turbines according to claim 5, wherein: the lower end face, close to one end of the upper half block (11), of the pressing sleeve (65) is provided with a sharp corner (67), the upper end face of the upper half block (11) is provided with a groove (111), and the sharp corner (67) is arranged in the groove (111).
7. The vertically split low-pressure inner casing for steam turbines according to claim 6, wherein: the sections of the sharp corners (67) and the grooves (111) are triangular.
8. The vertically split low-pressure inner casing for steam turbines according to claim 4, wherein: and a sealing gasket (68) is arranged between the upper half block (11) and the lower half block (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121329546.3U CN214787571U (en) | 2021-06-16 | 2021-06-16 | Up-down split type low-pressure inner cylinder for steam turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121329546.3U CN214787571U (en) | 2021-06-16 | 2021-06-16 | Up-down split type low-pressure inner cylinder for steam turbine |
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| CN214787571U true CN214787571U (en) | 2021-11-19 |
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| CN202121329546.3U Active CN214787571U (en) | 2021-06-16 | 2021-06-16 | Up-down split type low-pressure inner cylinder for steam turbine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198164A (en) * | 2021-12-28 | 2022-03-18 | 哈尔滨广瀚新能动力有限公司 | Safety protection device for steam turbine test |
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2021
- 2021-06-16 CN CN202121329546.3U patent/CN214787571U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198164A (en) * | 2021-12-28 | 2022-03-18 | 哈尔滨广瀚新能动力有限公司 | Safety protection device for steam turbine test |
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