CN201071738Y - Stationary blade of industrial steam turbine - Google Patents

Abstract

The utility model relates to an stationary blade of an industrial steam turbine, comprising three parts, including a blade shroud, a blade root and a blade body; the blade shroud is an inclined shroud with degree of inclination of 5 - 35 degrees, so as to effectively increase the area of an air outlet, and improve the service efficiency of the steam; two sides of the blade root are separately provided with grooves to fix the stationary blade; the blade body is a curved variable cross section which is the cross section with 12 equal portions in length, and the cross section decreases gradually from the root part to the top part of the blade body. The structure can sufficiently utilize pressure change of the steam in different spaces, so as to sufficiently transform the steam energy, which is suitable for large-scale low pressure equipment with 60,000 kW.

Description

An industrial steam turbine vane

technical field

The utility model relates to an industrial steam turbine stationary vane, in particular to an industrial steam turbine stationary vane with a slanted crown and a curved variable section blade body.

Background technique

At present, the blade crowns of industrial steam turbine stator blades on the market are generally square crowns, and the blade body is of equal cross-section. Such stator blades are limited to small machines and can only be used for high pressure, and cannot be used for large low pressure equipment.

Contents of the invention

The utility model provides an industrial steam turbine stationary vane with a slanted crown and a curved variable section, which can be applied to large-scale low-pressure equipment.

In order to solve the above technical problems, an industrial steam turbine stator blade of the utility model includes three parts: a blade crown, a blade root, and a blade body, and is characterized in that: the blade crown is an oblique crown; both sides of the blade root are open groove; the airfoil is a curved variable section.

The slope of the leaf cap is 5-35°.

The curved variable section of the airfoil has 12 sections in total, and the lengths between the sections are equally divided.

The advantage of a kind of industrial steam turbine vane of above structure is:

1. Since the leaf crown of this structure adopts a slanted crown, the area of the air outlet is effectively increased and the efficiency of steam use is improved.

2. The airfoil of this structure adopts a curved cross-section structure, which makes full use of the pressure change of steam in different spaces, so that the steam energy can be fully converted.

3. The structure is convenient for processing, especially suitable for numerical control processing.

4. The structure is suitable for large-scale low-voltage machinery above 60,000 kilowatts.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the front view of the utility model.

Detailed ways

As shown in Figures 1 and 2, the vane of the utility model is integrally forged from the vane crown 1, blade body 2, and blade root 3. The vane crown 1 is an oblique crown with an angle of 5-35°, effectively increasing the air outlet The area of the blade is increased to improve the efficiency of steam use; grooves 4 and 5 are slotted on both sides of the blade root 3, which are used to fix the vane from both sides and increase the stability of the vane; Divided into 12 sections, the lengths between each section are equal, and the section gradually becomes smaller from the root of the blade body to the top section. The typical section of the law of the curved variable section of the blade body 2 is specifically given as follows:

1. Guide vane NG512-1 line section A

2. Guide vane NG512-1 line section C

3. Guide vane NG512-1 line section G

4. Guide vane NG512-1 line section K

The curved variable section can make full use of the pressure change of the steam in different spaces, so that the energy of the steam can be fully converted, and is especially suitable for large-scale low-pressure equipment.

Claims (3)

1. an industrial steam turbine stator blade comprises integral shroud, blade root, blade three parts, it is characterized in that: described integral shroud is for tiltedly being preced with; All slot in the both sides of described blade root; Described blade is crooked variable cross section.

2. a kind of industrial steam turbine stator blade according to claim 1, it is characterized in that: the gradient of described integral shroud is at 5-35 °.

3. a kind of industrial steam turbine stator blade according to claim 1 is characterized in that: the crooked variable cross section of described blade is totally 12 cross sections, and the length between described cross section is five equilibrium.

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