CN220167992U - Long-life blade of marine steam turbine - Google Patents
Long-life blade of marine steam turbine Download PDFInfo
- Publication number
- CN220167992U CN220167992U CN202321588332.7U CN202321588332U CN220167992U CN 220167992 U CN220167992 U CN 220167992U CN 202321588332 U CN202321588332 U CN 202321588332U CN 220167992 U CN220167992 U CN 220167992U
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- blade
- face
- blade top
- limiting
- ejector rod
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- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 238000007493 shaping process Methods 0.000 claims 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model relates to a long-life blade of a marine steam turbine, wherein two ends of a blade top are respectively provided with parallel oblique end faces, the side edge of the oblique end face at one end of the blade top is provided with a clamping joint with a circular arc-shaped cross section, the oblique end face at the other end is provided with a circular arc-shaped clamping groove, a plane-shaped limiting end face is formed between the side edge at one side of the clamping groove and the oblique end face of the blade top, the limiting end face is provided with a step hole penetrating through the end face at the blade top side, a T-shaped ejector rod is inserted into the step hole, one end of the ejector rod extends out of the limiting end face and is fixed with a spherical limiting head, a spring is inserted into the ejector rod, and one end of the spring is pressed against the limiting head and the other end of the spring is pressed against the step face of the step hole. The structure of mutual joint is equipped with on the top of the leaf on this blade, joint convenient and fast, and joint back between the top of the leaf high connection strength, can effectively guarantee the life of blade.
Description
Technical field:
the utility model relates to the technical field of turbine blades, in particular to a long-service-life blade of a marine turbine.
The background technology is as follows:
at present, a steam turbine is adopted on a ship to convert heat energy into mechanical energy, a steam turbine system comprises a steam turbine shell, a plurality of groups of impellers longitudinally arranged along a shell shaft and the like, part of impellers consist of a plurality of groups of annularly arranged blades, each blade comprises a blade body, a blade root and a blade top, and the blade root is a connecting part for fixing the blade body on the impeller or a rotary drum; the blade top is also called a blade crown, the blade top of a part of steam turbine can be surrounded by a circular arc ring body, the blade tops are connected together by adopting a shroud at the blade top part, as shown in fig. 1, one end of the blade top 11 is formed with a V-shaped groove 12', the other end of the blade top is formed with a conical flange 13', when the blade tops 11 are matched, the flange 13 'is inserted into the V-shaped groove 12' to realize positioning, but the blade tops cannot be fixedly connected together, the shroud needs to be fixedly connected, but the shroud can fall off, the installation is inconvenient, and the service life of the impeller is influenced, so that one proposes to arrange a structure on the blade tops to realize mutual fixedly connection without the shroud, and the service life of the blade can be effectively ensured.
The utility model comprises the following steps:
the utility model aims at overcoming the defects of the prior art, and provides the long-service-life blade of the marine steam turbine, wherein the blade tops on the blade are provided with the mutually-clamped structures, the clamping is convenient and quick, the connection strength between the blade tops after the clamping is high, and the service life of the blade can be effectively ensured.
The long-life blade of the marine steam turbine comprises an impeller of the steam turbine, wherein the impeller consists of a plurality of groups of annular torsion blades, blade roots are formed at the inner ends of the torsion blades, arc-shaped blade tops are formed at the outer ends of the torsion blades, parallel inclined end faces are respectively formed at two ends of the blade tops, a clamping joint with an arc-shaped section is formed at the side edge of the inclined end face of one end of the blade top, an arc-shaped clamping groove is formed on the inclined end face of the other end of the blade top, a planar limiting end face is formed between the side edge of one side of the clamping groove and the inclined end face of the blade top, a step hole penetrating through the end face of the blade top is formed on the limiting end face, a T-shaped ejector rod is inserted into the step hole, a spherical limiting head is fixedly arranged at one end of the ejector rod, a spring is inserted into the ejector rod, one end of the spring is pressed against the limiting head, and the other end of the spring is pressed against the step face of the step hole;
oblique end faces of adjacent blade tops in the impeller are mutually abutted together and are surrounded to form a circular ring body, a clamping connector at one end of each blade top is inserted into a clamping groove of the adjacent blade top, and the limiting head is pressed against the outer wall of the clamping connector, which is close to the end face of the side of the blade top.
Preferably, the arc radian of the outer wall of the clamping connector on the blade top is larger than pi.
Preferably, the arc radian of the inner wall of the buckling groove on the blade top is smaller than pi, and the arc radius of the inner wall of the buckling groove is equal to the arc radius of the outer wall of the clamping joint.
Preferably, the step hole of She Dingshang is composed of a large hole and a small hole, the orifice of the large hole is positioned on the limiting end face, and the diameter of the large hole on the step hole is equal to the diameter of the limiting head.
Preferably, the ejector rod is provided with a stud in a forming mode, the stud is fixedly connected in the limiting head in a threaded mode, and the center of the limiting head is located on the central axis of the ejector rod.
Preferably, a counter bore communicated with the step hole is formed on the side end face of the blade top, and the head of the ejector rod is inserted into the counter bore of the blade top and is pressed against the bottom face of the counter bore.
The utility model has the beneficial effects that:
the structure of mutual joint is equipped with on the top of the leaf on this blade, joint convenient and fast, and joint back between the top of the leaf high connection strength, can effectively guarantee the life of blade.
Description of the drawings:
FIG. 1 is a schematic view of a partial structure of a prior art turbine upper twisted vane connection;
FIG. 2 is a schematic view of a partial structure of the connection of the top portions of the twisted leaves of the present utility model;
fig. 3 is an enlarged partial schematic view at a in fig. 2.
In the figure: 1. twisting the leaves; 11. leaf tops; 12', V-grooves; 13', flanges; 12. a buckle groove; 13. a clamping joint; 14. a limiting end face; 15. countersink; 16. a step hole; 2. a positioning head; 3. a push rod; 4. and (3) a spring.
The specific embodiment is as follows:
examples: as shown in fig. 1 to 3, a long-life blade of a marine steam turbine comprises an impeller of the steam turbine, the impeller is composed of a plurality of groups of annular torsion blades 1, blade roots are formed at the inner ends of the torsion blades 1, arc-shaped blade tops 11 are formed at the outer ends of the torsion blades, parallel inclined end faces are respectively formed at two ends of the blade tops 11, a clamping joint 13 with an arc-shaped section is formed at the side edge of the inclined end face of one end of the blade top 11, an arc-shaped clamping groove 12 is formed at the inclined end face of the other end of the blade top, a plane-shaped limiting end face 14 is formed between the side edge of one side of the clamping groove 12 and the inclined end face of the blade top 11, a step hole 16 penetrating through the side end face of the blade top 11 is formed in the limiting end face 14, a T-shaped ejector rod 3 is inserted into the step hole 16, one end of the ejector rod 3 extends out of the limiting end face 14 to be fixed with a spherical limiting head 2, a spring 4 is inserted into the ejector rod 3, one end of the spring 4 is pressed against the limiting head 2, and the other end of the spring 4 is pressed against the step face of the step hole 16;
inclined end faces of adjacent blade tops 11 in the impeller are mutually abutted together and are surrounded to form a circular ring body, a clamping connector 13 at one end of each blade top 11 is inserted into a clamping groove 12 of the adjacent blade top 11, and the limiting head 2 is pressed against the outer wall of the clamping connector 13, which is close to the side end face of the blade top 11.
The arc radian of the outer wall of the clamping connector 13 on the blade top 11 is larger than pi, and the adjacent blade tops 11 can be clamped together only when the arc of the clamping connector 13 is larger than the arc of a semicircle.
The arc radian of the inner wall of the buckling groove 12 on the blade top 11 is smaller than pi, the arc radius of the inner wall of the buckling groove 12 is equal to the arc radius of the outer wall of the clamping joint 13, the buckling groove 12 is matched with the clamping joint 13, and superposition is achieved after clamping.
The step hole 16 on the blade top 11 consists of a large hole and a small hole, the orifice of the large hole is positioned on the limiting end face 14, the aperture of the large hole on the step hole 16 is equal to the diameter of the limiting head 2, when the blade tops 11 are clamped with each other, the clamping head 13 on the blade top 11 can press the limiting head 2 to enter the step hole 16, and then the clamping head 13 can pass through the limiting head 2 to enter the clamping groove 12.
The ejector rod 3 is provided with a stud in a forming mode, the stud is fixedly connected in the limiting head 2 in a threaded mode, and the center of the limiting head 2 is located on the central axis of the ejector rod 3.
The side end face of the blade top 11 is provided with a counter bore 15 communicated with the step hole 16, the head of the ejector rod 3 is inserted into the counter bore 15 of the blade top 11 and is pressed against the bottom surface of the counter bore 15, and the ejector rod 3 is hidden in the blade top 11, so that the influence on the air flow generated by the rotation of the impeller is small.
Working principle: the utility model relates to a long-life blade of a marine steam turbine, which is characterized in that the blade is positioned on a blade top 11 of the blade, the blade top 11 is provided with a clamping connector 13 and a clamping groove 12, when the blade is installed, the clamping connector 13 of the blade top 11 can be inserted into the clamping groove 12 beyond a limiting head 2, and the limiting head 2 can be pressed against the clamping connector 13 under the action of a spring 4;
when repulsive force exists between the blade tops 11, the limiting heads 2 can be pressed on the clamping joints 13 to limit the separation of the blade tops 11 and the clamping joints.
The examples are presented to illustrate the utility model and are not intended to limit the utility model. Modifications to the described embodiment may occur to those skilled in the art without departing from the spirit and scope of the utility model, and the scope of the utility model is therefore set forth in the appended claims.
Claims (6)
1. The utility model provides a marine turbine's long-life blade, includes the impeller of steam turbine, and the impeller comprises a plurality of groups and is annular distributed turn round leaf (1), and the inner shaping of turn round leaf (1) has blade root, outer end shaping to have convex blade top (11), its characterized in that: two ends of the blade top (11) are respectively provided with parallel inclined end faces, a clamping joint (13) with a circular arc-shaped cross section is formed on the side edge of the inclined end face of one end of the blade top (11), a circular arc-shaped clamping groove (12) is formed on the inclined end face of the other end of the blade top, a plane-shaped limiting end face (14) is formed between the side edge of one side of the clamping groove (12) and the inclined end face of the blade top (11), a step hole (16) penetrating through the side end face of the blade top (11) is formed on the limiting end face (14), a T-shaped ejector rod (3) is inserted into the step hole (16), one end of the ejector rod (3) extends out of the limiting end face (14) to be fixed with a spherical limiting head (2), a spring (4) is inserted into the ejector rod (3), and one end of the spring (4) is pressed on the limiting head (2) and the other end of the spring is pressed on the step face of the step hole (16);
inclined end faces of adjacent blade tops (11) in the impeller are mutually abutted together and are surrounded to form a circular ring body, a clamping connector (13) at one end of each blade top (11) is inserted into a clamping groove (12) of the adjacent blade top (11), and the limiting head (2) is pressed against the outer wall of the clamping connector (13) close to the side end face of each blade top (11).
2. A long life blade for a marine steam turbine according to claim 1, wherein: the arc radian of the outer wall of the clamping connector (13) on the blade top (11) is larger than pi.
3. A long life blade for a marine steam turbine according to claim 2, wherein: the arc radian of the inner wall of the buckling groove (12) on the blade top (11) is smaller than pi, and the arc radius of the inner wall of the buckling groove (12) is equal to the arc radius of the outer wall of the buckling joint (13).
4. A long life blade for a marine steam turbine according to claim 1, wherein: the step hole (16) on the blade top (11) consists of a large hole and a small hole, the orifice of the large hole is positioned on the limiting end face (14), and the aperture of the large hole on the step hole (16) is equal to the diameter of the limiting head (2).
5. The long life blade of a marine steam turbine of claim 4, wherein: the ejector rod (3) is provided with a stud in a forming mode, the stud is fixedly connected in the limiting head (2) in a threaded mode, and the center of the limiting head (2) is located on the central axis of the ejector rod (3).
6. A long life blade for a marine steam turbine according to claim 1, wherein: a counter bore (15) communicated with the step hole (16) is formed in the side end face of the blade top (11), and the head of the ejector rod (3) is inserted into the counter bore (15) of the blade top (11) and pressed against the bottom face of the counter bore (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321588332.7U CN220167992U (en) | 2023-06-20 | 2023-06-20 | Long-life blade of marine steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321588332.7U CN220167992U (en) | 2023-06-20 | 2023-06-20 | Long-life blade of marine steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220167992U true CN220167992U (en) | 2023-12-12 |
Family
ID=89057078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321588332.7U Active CN220167992U (en) | 2023-06-20 | 2023-06-20 | Long-life blade of marine steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220167992U (en) |
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2023
- 2023-06-20 CN CN202321588332.7U patent/CN220167992U/en active Active
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