CN217143160U

CN217143160U - Steam turbine double-wing angle blade machining device

Info

Publication number: CN217143160U
Application number: CN202220739151.9U
Authority: CN
Inventors: 纪文龙; 徐玉宝; 沈宏伟; 刁建平; 程立滨; 李鹏; 李洪亮; 张慧
Original assignee: Harbin Turbine Co Ltd
Current assignee: Harbin Turbine Co Ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-08-09
Anticipated expiration: 2032-03-31

Abstract

The utility model relates to the field of turbine blade processing, in particular to a turbine double-wing angle blade processing device, which aims to solve the problem that the size control of a blade is unstable when a low-pressure double-wing angle moving blade is processed by the prior method, and the thickness of a radial pitch is influenced; the radial laminating degree of blade shroud back and blade root back, can't satisfy the problem of technological requirement, this scheme is kept silent clamp plate A and is kept silent clamp plate B longitudinal symmetry and set up on the anchor clamps connection pad, keep silent clamp plate A and keep silent the clamp plate B between the clearance form the centre gripping interval, two keep silent A arrange in keep silent clamp plate A's lower part, keep silent B arranges in keep silent clamp plate B's upper portion, keep silent A and keep silent B all towards the interval setting of centre gripping, the thimble sets up on the anchor clamps connection pad, and the thimble sets up in the centre gripping interval, this processingequipment passes through preparation frock clamp when processing key engineering moving blade, assembly clearance accords with technological standard once at the in-process of final assembly, solve the bottleneck that the restriction is given birth to, the completion production and processing task of quality and quality guarantee volume.

Description

Double-wing-angle blade machining device for steam turbine

Technical Field

The utility model relates to a steam turbine blade processing field, concretely relates to steam turbine double wing angle blade processingequipment.

Background

When the low-pressure double-wing angular motion blade of the steam turbine is machined, the total length of the blade reaches 500MM, the unprecedented length is achieved in key projects, the precision of the quality requirement of the blade is extremely strict, the fit degree of a blade root back radial surface and a blade crown back radial surface is less than 0.02MM, the conventional product is used for pre-twisting the blade, the fit degree of the blade root and the blade crown is not possible to ensure that 0.02MM is ensured, and the key project is not allowed to have half-point out-of-tolerance phenomenon, so that the production task of quality and quantity maintenance must be completed according to time nodes. When the low-pressure double-wing angle moving blade is processed by the existing method, the following problems exist:

1. instability in blade size control affects the thickness of the radial pitch;

2. the radial fitting degree of the blade shroud back and the blade root back cannot meet the process requirement of 0.02 mm.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a purpose: the utility model discloses a solve when current mode processing low pressure double wing angle moves the blade, the problem of existence, the utility model provides a steam turbine double wing angle blade processingequipment.

In order to achieve the purpose, the double-wing angle blade machining device for the steam turbine comprises a clamp connecting disc, a connecting bolt, a jaw pressing plate A, a jaw pressing plate B, a thimble, a jaw A and a jaw B;

keep silent clamp plate A and keep silent clamp plate B longitudinal symmetry set up on the anchor clamps connection pad, keep silent clamp plate A and keep silent the clearance between the clamp plate B and form the centre gripping interval, keep silent A for two and arrange in the lower part of keeping silent clamp plate A, keep silent B and arrange on the upper portion of keeping silent clamp plate B, keep silent A and keep silent B all towards the interval setting of centre gripping, the thimble sets up on the anchor clamps connection pad, and the thimble sets up in the centre gripping interval.

Further, the jaw pressing plate A and the jaw pressing plate B are respectively connected with the clamp connecting disc through a connecting bolt.

And furthermore, the ejector pins are connected with the clamp connecting disc through ejector pin flange plates.

Furthermore, the thimble flange plate is embedded into the clamp connecting plate.

And furthermore, the upper end of the thimble flange plate is arranged between the jaw pressing plate A and the clamp connecting plate, and the lower end of the thimble flange plate is arranged between the jaw pressing plate B and the clamp connecting plate.

Further, two jaws A are symmetrically arranged at the lower part of the jaw pressing plate A, and a jaw B is positioned between the two jaws A.

Still further, the jaw B is equally spaced from each jaw a.

Further, the jaw A is in bolted connection with the jaw pressing plate A, and the jaw B is in bolted connection with the jaw pressing plate B.

Has the advantages that:

when the device is used for clamping a blade, the jaw pressing plate A and the jaw pressing plate B are adjusted, the jaw pressing plate A is provided with two jaws A, the jaw pressing plate B is provided with one jaw B, so that the stability during pressing can be well kept, the blade cannot generate any unstable factors even if a blade process handle is uneven, and the axial precision is well ensured. The fitting degree of the blade crown of the blade root is less than 0.02MM, and the one-time assembling clearance accords with the process standard in the final assembly process. The innovative thinking is used for solving the problems in the processing, the bottleneck restricting the production is solved, and the production and processing tasks are finished with quality and quantity guarantee.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a double-wing angle blade processing device of a steam turbine according to the present invention;

fig. 2 is a left side sectional view of fig. 1.

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 accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

For the convenience of understanding the embodiments of the present invention, the following description will be further explained by taking several specific embodiments as examples in conjunction with the drawings, and the embodiments are not to be construed as limiting the embodiments of the present invention.

The following embodiments are described with reference to fig. 1 to 2:

the first embodiment is as follows: a turbine double-wing angle blade processing device comprises a clamp connecting disc 1, a connecting bolt 2, a jaw pressure plate A3, a jaw pressure plate B4, a thimble 5, a jaw A6 and a jaw B7;

the clamp comprises a clamp connecting disc 1, wherein a clamp pressing plate A3 and a clamp pressing plate B4 are symmetrically arranged on the clamp connecting disc 1 from top to bottom, a clamping interval is formed by a gap between a clamp pressing plate A3 and a clamp pressing plate B4, two clamp jaws A6 are arranged on the lower portion of a clamp pressing plate A3, the clamp jaws B4 are arranged on the upper portion of a clamp pressing plate B4, the clamp jaws A6 and the clamp jaws B7 are both arranged towards the clamping interval, a thimble 5 is arranged on the clamp connecting disc 1, and the thimble 5 is arranged in the clamping interval.

The second embodiment is as follows: a machining device for a double-wing-angle blade of a steam turbine is characterized in that a jaw pressing plate A3 and a jaw pressing plate B4 are connected with a clamp connecting plate 1 through connecting bolts 2 respectively.

In the present embodiment: the jaw pressing plate A and the jaw pressing plate B are connected with the clamp connecting disc through a connecting bolt respectively, and the jaw pressing plate A and the jaw pressing plate B are convenient to detach and overhaul.

Other embodiments are the same as the first embodiment.

The third concrete implementation mode: a machining device for double-wing angle blades of a steam turbine is characterized in that a thimble 5 is connected with a clamp connecting disc 1 through a thimble flange plate 8.

In the present embodiment: the thimble passes through the anchor clamps connection pad to be fixed, and the installation is firm.

Other embodiments are the same as the first embodiment.

The fourth concrete implementation mode: a machining device for double-wing angle blades of a steam turbine is characterized in that an ejector pin flange plate 8 is embedded into a clamp connecting plate 1.

In the present embodiment: the thimble flange plate is embedded into the clamp connecting plate, the mounting position is stable, and radial play is not easy to occur.

Other embodiments are the same as the third embodiment.

The fifth concrete implementation mode: the upper end of a thimble flange 8 is arranged between a jaw pressing plate A3 and a clamp connecting disc 1, and the lower end of the thimble flange 8 is arranged between a jaw pressing plate B4 and the clamp connecting disc 1.

In the present embodiment: the thimble ring flange compresses tightly through keeping silent clamp plate A and keeping silent clamp plate B, and the jackscrew ring flange is fixed comparatively stably, is difficult for taking place the axis drunkenness.

The other embodiments are the same as the fourth embodiment.

The sixth specific implementation mode: a double wing angle blade processing device of a steam turbine is characterized in that two jaws A6 are symmetrically arranged at the lower part of a jaw pressing plate A3, and a jaw B7 is positioned between the two jaws A6.

Other embodiments are the same as the first embodiment.

The seventh embodiment: the jaw B7 is equally spaced from each jaw A6.

In the present embodiment: the distance between the jaw B and each jaw A is equal, and the clamping is stable.

The other embodiments are the same as the sixth embodiment.

The specific implementation mode is eight: a jaw A6 is connected with a jaw pressing plate A3 through bolts, and jaws B7 are connected with jaw pressing plates B4 through bolts.

In the embodiment, the jaw A is connected with the jaw pressing plate A through the bolt, and the jaw B is connected with the jaw pressing plate B through the bolt, so that the jaw is convenient to detach and overhaul.

The other embodiments are the same as the seventh embodiment.

The working principle is as follows:

1. processing the surface of the blade: in order to improve the radial surface roughness, the mode of different rotating speeds of the two cutters is adopted for processing, so that the overlapping of the cutter grains generated during processing can be effectively avoided, and the surface quality of the blade can be effectively improved.

2. Processing a blade root crown: in order to ensure the radial consistency of the root cap, the same cutter is adopted for processing, and the processing of the same cutter can effectively avoid different abrasion degrees of the two cutters and unstable factors generated by processing.

3. The clamping state of the blade on the fixture was repeatedly tested. The blade clamping and loosening method has the advantages that the position change of the blade cannot be caused after the blade is clamped and loosened, the stability of the blade during machining is controlled firstly, the vibration generated during machining is reduced, each vibration affects the radial machining angle of the blade during machining, a five-axis double-drive machining method of the blade needs to be adopted, the states of the blade are measured by a dial indicator in the clamping and loosening states respectively, the machining precision can be controlled only when the state of the blade is constant, the jaw pressing plate A and the jaw pressing plate B are adjusted, the jaw pressing plate A is provided with two jaws A, the jaw pressing plate B is provided with one jaw B, the stability during pressing can be well maintained, any unstable factor cannot be caused to the blade even if a technological handle of the blade is uneven, and the axial precision is well guaranteed.

4. The blade blank is die forging material, root crown thimble hole concentricity is unable to be guaranteed, so clamping and unclamping state, the blade radial direction can change to some extent, this also leads to the blade laminating degree can't satisfy the essential reason of precision requirement, adopt the online measuring method of lathe, measure blade state before processing and blade free state after processing respectively, look over two states and have what kind of change, measure the amount of movement of two changes, compensate its displacement in the compensation value of lathe, transfer the compensation value and carry out the secondary finish machining during processing, this kind of method can effectually solve the problem that thimble hole concentricity is not good to influence blade root crown laminating degree not good.

5. The using function of automatic clamping and automatic loosening of the blade shroud is further developed, and the function can measure the variation in the free state and the clamping state and has influence on the processing quality.

6. When the measuring head measures the blade in a non-clamping state, the blade has slight vibration to influence the accuracy of measured data, because the clamping function used during measurement is not accurate enough, the moment of a machine tool is overlarge during moment coupling, the vibration can be generated in a free state, the accuracy of the measured data of the measuring head can be influenced, and the problem is solved by modifying clamping parameters.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a two wing angle blade processingequipment of steam turbine which characterized in that: the clamp comprises a clamp connecting disc (1), a connecting bolt (2), a jaw pressing plate A (3), a jaw pressing plate B (4), a thimble (5), a jaw A (6) and a jaw B (7);

keep silent clamp plate A (3) and keep silent clamp plate B (4) symmetry about setting on anchor clamps connection pad (1), keep silent clamp plate A (3) and keep silent the clearance between clamp plate B (4) and form the centre gripping interval, two keep silent A (6) arrange in the lower part of keeping silent clamp plate A (3), keep silent B (7) and arrange on the upper portion of keeping silent clamp plate B (4), keep silent A (6) and keep silent B (7) all set up towards the centre gripping interval, thimble (5) set up on anchor clamps connection pad (1), and thimble (5) set up in the centre gripping interval.

2. The apparatus for machining a double-winged angle blade of a steam turbine as claimed in claim 1, wherein: the jaw pressing plate A (3) and the jaw pressing plate B (4) are respectively connected with the clamp connecting disc (1) through a connecting bolt (2).

3. The apparatus for machining a double-wing angle blade of a steam turbine according to claim 1, wherein: the ejector pin (5) is connected with the clamp connecting disc (1) through an ejector pin flange plate (8).

4. The apparatus for machining a double-winged angle blade of a steam turbine as claimed in claim 3, wherein: the thimble flange plate (8) is embedded into the clamp connecting plate (1).

5. The apparatus for machining a double-winged angle blade of a steam turbine as claimed in claim 4, wherein: the upper end of the thimble flange plate (8) is arranged between the jaw pressing plate A (3) and the clamp connecting disc (1), and the lower end of the thimble flange plate (8) is arranged between the jaw pressing plate B (4) and the clamp connecting disc (1).

6. The apparatus for machining a double-wing angle blade of a steam turbine according to claim 1, wherein: the two jaws A (6) are symmetrically arranged at the lower part of the jaw pressing plate A (3), and the jaw B (7) is positioned between the two jaws A (6).

7. The apparatus for machining a double-winged angle blade of a steam turbine as claimed in claim 6, wherein: the distance between the jaw B (7) and each jaw A (6) is equal.

8. The apparatus for machining a double-winged angle blade of a steam turbine as claimed in claim 7, wherein: the jaw A (6) is connected with the jaw pressing plate A (3) through bolts, and the jaw B (7) is connected with the jaw pressing plate B (4) through bolts.