CN216130969U - Transverse stationary blade for multistage small enthalpy drop unit - Google Patents
Transverse stationary blade for multistage small enthalpy drop unit Download PDFInfo
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- CN216130969U CN216130969U CN202123008812.5U CN202123008812U CN216130969U CN 216130969 U CN216130969 U CN 216130969U CN 202123008812 U CN202123008812 U CN 202123008812U CN 216130969 U CN216130969 U CN 216130969U
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Abstract
A transverse stationary blade for a multistage small enthalpy drop unit belongs to the field of design of parts of a steam turbine. The utility model relates to a solve current multistage little enthalpy drop unit shafting length overlength, the great problem of admission loss. The novel blade comprises a blade body, a first blade root and a second blade root, wherein one end of the blade body is connected with the first blade root, and the other end of the blade body is connected with the second blade root; the blade body, the first blade root and the second blade root are integrally manufactured; the upper surface of the blade body is a streamline curved surface, the lower surface of the blade body is a curved surface protruding outwards, and the cross section of the blade body is of a blade type with equal section. The utility model is mainly used for structural elements of steam turbines.
Description
Technical Field
The utility model belongs to the field of design of parts of a steam turbine, and particularly relates to a transverse stationary blade for a multi-stage small enthalpy drop unit.
Background
With the increasing requirements on the economical efficiency of the steam turbine, the multistage small enthalpy drop becomes a mainstream means for improving the through-flow efficiency, the length of a unit shaft system is too long due to more stages of the multistage small enthalpy drop unit, the manufacturing cost is increased, and the through-flow loss is larger due to the conventional design mode of the 1 st stage stationary blade for full-cycle steam admission. Therefore, in order to reduce the length of the shaft system, save the production and manufacturing cost and further improve the through-flow efficiency, the transverse stationary blades of the multistage small enthalpy drop unit need to be designed.
SUMMERY OF THE UTILITY MODEL
The technical problems to be solved by the utility model are as follows: the problems that the existing multistage small enthalpy drop unit is too long in shafting length and large in steam inlet loss are solved, and the transverse stationary blade for the multistage small enthalpy drop unit is further provided.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
a transverse stationary blade for a multistage small enthalpy drop unit comprises a blade body 1, a first blade root 2 and a second blade root 3, wherein one end of the blade body 1 is connected with the first blade root 2, and the other end of the blade body 1 is connected with the second blade root 3;
the blade body 1, the first blade root 2 and the second blade root 3 are integrally manufactured;
the upper surface of the blade body 1 is a streamline curved surface, the lower surface of the blade body 1 is a curved surface protruding outwards, and the cross section of the blade body 1 is a blade type with an equal section.
Further, let the inlet angle of the steam inlet end of the blade body 1 be α, which is 143.684 °.
Further, let the exit angle of the steam outlet end of the blade body 1 be θ, and θ be 12.004 °.
Further, let the setting angle of the blade body 1 be β, β becomes 55 °.
Further, let the height of the blade body 1 be L, L is 66.5 mm; setting the width of the blade body 1 as V, wherein V is 43.31 mm; let the chord length of the blade body 1 be b, b is 85.18 mm; setting the distance from the steam outlet edge of the blade body 1 to the axis of the rotor as D, wherein D is 1126 mm; let the flow area of the blade body 1 be S1，S1＝54035.57mm2(ii) a Let the cross-sectional area of the blade body 1 be S2，S2＝：1177.34mm2(ii) a Let the maximum thickness of the blade body 1 be T, and T is 22.45 mm.
Furthermore, a notch 2-1 is formed in the end face of one side of the first blade root 2.
Further, let the thickness of the first blade root 2 be h1，h121.5mm, the width of the first blade root 2 is assumed to be w1，w1＝58mm。
Further, let the thickness of the second blade root 3 be h2，h212 mm; let the width of the second blade root 3 be w2，w2＝58mm。
Compared with the prior art, the utility model has the following beneficial effects:
1. the utility model is based on one-dimensional/quasi-three-dimensional/three-dimensional pneumatic and thermodynamic analysis and calculation, and is combined with the steam inlet volute and the movable blade structure to carry out full three-dimensional design, thereby improving the steam flow characteristic of the volute after steam inlet, effectively reducing the gas flow loss from the steam inlet to the front of the stage 1 movable blade, and improving the unit efficiency.
2. The utility model has convenient assembly, adopts a mode of fixing two ends, has higher bending resistance and vibration resistance compared with the conventional stationary blade, and has safe and reliable operation.
3. According to the utility model, the 1 st stage stationary blade is transversely arranged at the outlet of the steam inlet volute, so that a part of space can be saved in the axial direction, the length of a shaft system is reduced, and the unit cost is reduced.
4. The utility model can be used as the stationary blades of the 1 st stage of the high and medium pressure cylinders of the multi-stage small enthalpy drop steam turbine, and the advanced level is achieved in the aspects of economy, vibration characteristic, static strength and safety and reliability of the unit.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the present invention in combination with an inlet volute and rotor blades;
FIG. 3 is a schematic cross-sectional view of a blade body;
FIG. 4 is an enlarged view of a portion of FIG. 3 at I;
fig. 5 is a partial enlarged view at II in fig. 3.
Detailed Description
The technical solution of the present invention is further described by the specific embodiments with reference to fig. 1 to 5 below:
a transverse stationary blade for a multistage small enthalpy drop unit comprises a blade body 1, a first blade root 2 and a second blade root 3, wherein one end of the blade body 1 is connected with the first blade root 2, and the other end of the blade body 1 is connected with the second blade root 3;
the blade body 1, the first blade root 2 and the second blade root 3 are integrally manufactured;
the upper surface of the blade body 1 is a streamline curved surface, the lower surface of the blade body 1 is a curved surface protruding outwards, and the cross section of the blade body 1 is a blade type with an equal section.
The blade body 1 is fixed in the cylinder body through blade roots at two ends, and compared with a conventional stationary blade, the blade body has higher bending resistance and vibration resistance and is safe and reliable to operate in a mode of fixing the two ends.
The transverse stationary blades are assembled along the circumferential direction and are installed at the outlet of the steam inlet volute, and the split position in the upper half cylinder is fixed by screws after the assembly is finished.
In the present embodiment, the inlet angle of the steam inlet end of the blade body 1 is set to α, which is 143.684 °.
In the present embodiment, let θ be an exit angle of the steam outlet end of the blade body 1, and θ be 12.004 °.
In the present embodiment, the installation angle of the blade body 1 is set to β, and β is 55 °.
In the present embodiment, let L be the height of the blade body 1, and L is 66.5 mm; setting the width of the blade body 1 as V, wherein V is 43.31 mm; let the chord length of the blade body 1 be b, b is 85.18 mm; setting the distance from the steam outlet edge of the blade body 1 to the axis of the rotor as D, wherein D is 1126 mm; let the flow area of the blade body 1 be S1，S1＝54035.57mm2(ii) a Let the cross-sectional area of the blade body 1 be S2，S2＝：1177.34mm2(ii) a Let the maximum thickness of the blade body 1 be T, and T is 22.45 mm.
In the embodiment, a notch 2-1 is formed in one side end face of the first blade root 2; the fixing device is used for fixing the transverse static blades and preventing the transverse static blades from moving along the axial direction.
In the present embodiment, let the thickness of the first blade root 2 be h1，h121.5mm, the width of the first blade root 2 is assumed to be w1，w1＝58mm。
In the present embodiment, let the thickness of the second blade root 3 be h2，h212 mm; let the width of the second blade root 3 be w2，w2＝58mm。
By adopting the structural parameters, the utility model ensures that the overall structure size of the blade meets the design requirement, and meanwhile, the blade is transversely arranged at the outlet of the steam inlet volute, so that a part of space can be saved in the axial direction, thereby reducing the length of a shaft system, reducing the unit cost and facilitating the assembly of the blade.
Claims (8)
1. A horizontal stationary blade for multistage little enthalpy drop unit which characterized in that: the blade comprises a blade body (1), a first blade root (2) and a second blade root (3), wherein one end of the blade body (1) is connected with the first blade root (2), and the other end of the blade body (1) is connected with the second blade root (3);
the blade body (1), the first blade root (2) and the second blade root (3) are integrally manufactured;
the upper surface of the blade body (1) is a streamline curved surface, the lower surface of the blade body (1) is an outward convex curved surface, and the cross section of the blade body (1) is of a blade type with an equal section.
2. The transverse stationary vane for a multi-stage small enthalpy drop unit according to claim 1, characterized in that: an inlet angle of the steam inlet end of the blade body (1) is set to be alpha, and the alpha is 143.684 degrees.
3. The transverse stationary vane for a multi-stage small enthalpy drop unit according to claim 2, characterized in that: let the exit angle of the steam outlet end of the blade body (1) be theta, wherein theta is 12.004 degrees.
4. The transverse stationary vane for a multi-stage small enthalpy drop unit according to claim 3, characterized in that: the installation angle of the blade body (1) is beta, and the beta is 55 degrees.
5. The transverse stationary vane for a multi-stage small enthalpy drop unit according to claim 4, characterized in that: setting the height of the blade body (1) as L, wherein L is 66.5 mm; setting the width of the blade body (1) as V, wherein V is 43.31 mm; the chord length of the blade body (1) is b, and b is 85.18 mm; setting the distance from the steam outlet edge of the blade body (1) to the axis of the rotor as D, wherein D is 1126 mm; the flow area of the blade body (1) is S1，S1＝54035.57mm2(ii) a The cross section area of the cross section of the blade body (1) is S2，S2＝：1177.34mm2(ii) a Let the maximum thickness of the blade body (1) be T, and T is 22.45 mm.
6. The transverse stationary vane for a multi-stage small enthalpy drop unit according to claim 5, characterized in that: the end surface of one side of the first blade root (2) is provided with a notch (2-1).
7. The transverse stationary vane for a multi-stage small enthalpy drop unit according to claim 6, characterized in that: let the thickness of the first blade root (2) be h1，h1The width of the first blade root (2) is set as w which is 21.5mm1，w1＝58mm。
8. The transverse stationary vane for a multi-stage small enthalpy drop unit according to claim 7, characterized in that: let the thickness of the second blade root (3) be h2，h212 mm; let the width of the second blade root (3) be w2，w2＝58mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123008812.5U CN216130969U (en) | 2021-12-01 | 2021-12-01 | Transverse stationary blade for multistage small enthalpy drop unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123008812.5U CN216130969U (en) | 2021-12-01 | 2021-12-01 | Transverse stationary blade for multistage small enthalpy drop unit |
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| Publication Number | Publication Date |
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| CN216130969U true CN216130969U (en) | 2022-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123008812.5U Active CN216130969U (en) | 2021-12-01 | 2021-12-01 | Transverse stationary blade for multistage small enthalpy drop unit |
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2021
- 2021-12-01 CN CN202123008812.5U patent/CN216130969U/en active Active
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