CN110883342B - Processing method of single-stage blade of air-cooled steam turbine generator - Google Patents
Processing method of single-stage blade of air-cooled steam turbine generator Download PDFInfo
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- CN110883342B CN110883342B CN201911052297.5A CN201911052297A CN110883342B CN 110883342 B CN110883342 B CN 110883342B CN 201911052297 A CN201911052297 A CN 201911052297A CN 110883342 B CN110883342 B CN 110883342B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B1/00—Methods for turning or working essentially requiring the use of turning-machines; Use of auxiliary equipment in connection with such methods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B5/00—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
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- Motor Or Generator Cooling System (AREA)
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Abstract
The invention provides a turning method for a single-stage blade of an air-cooled steam turbine generator, and belongs to the technical field of mechanical processing of a generator rotor. During machining, the excircle of the fan seat of the rotor of the air-cooled steam turbine generator is used as a reference, the tool setting area is determined by determining the feeding direction of a cutting tool, and appropriate machining parameters are selected, so that the turning yield of the excircle of the single-stage blade of the generator is improved, the machining quality is improved, and the machining cost is reduced.
Description
Technical Field
The invention relates to a turning method for a single-stage blade of an air-cooled steam turbine generator, belonging to the technical field of mechanical processing of a generator rotor.
Background
The structure of the turbonator is different due to the different sizes of the generators, but the structure and the function of the main part are the same. The generator mainly comprises a rotor and a stator, wherein the rotor of the air-cooled steam turbine generator needs to be machined to obtain the air-cooled rotating shaft blade. The air cooling pivot single-stage blade is located air cooling turbo generator rotor fan seat, encloses into the round by the blade structure of a plurality of cross sections similar a slice leaf shape, is located air cooling turbo generator rotor fan seat perpendicularly. In the air-cooled rotating shaft blade machining process, due to the problems of materials, machining methods, tool selection, blade assembly angles and the like, the corner of the air-cooled rotating shaft blade is prone to fracture at the initial machining stage, and products are prone to being scrapped. The blade processing has low qualification rate and high production cost.
Disclosure of Invention
The invention aims to solve the problem that the edge and corner of the air-cooled rotating shaft blade are broken to cause product rejection in the initial processing stage at present. Low qualified rate of blade processing and high production cost.
In order to solve the problem, the technical scheme adopted by the invention is to provide a turning method of a single-stage blade of an air-cooled steam turbine generator, which is characterized by comprising the following steps:
step 1: preparing a cutter, a square blade and a cutter handle; clamping a rotor of an air-cooled turbonator to be processed on a lathe, and taking the excircle of a fan seat of the rotor of the air-cooled turbonator as a reference;
step 2: determining the feeding direction of a cutting tool, determining the feeding direction of the cutting tool before processing, and determining the feeding direction of the cutting tool according to the blade assembly form on a rotor fan seat of an air-cooled steam turbine generator; when the big end of the blade is close to the central line of the rotor shaft of the air-cooled turbogenerator, the reverse direction line of the extension line of the advancing cutter and the arc line of the small end of the blade of the generator rotor form an acute angle; when the small end of the blade is close to the central line of the rotor shaft of the air-cooled turbogenerator, the reverse direction line of the extension line of the advancing cutter and the arc line of the large end of the rotor blade of the generator form an acute angle;
and step 3: determining a tool setting area, wherein tool setting needs to be carried out before machining the excircle of the generator rotor blade; the tool setting areas are required to be arranged at two end parts of the blade;
and 4, step 4: starting turning, and selecting proper processing parameters in the processing; the turning parameters were as follows: the rotating speed of the lathe is 15-20r/min, the feeding speed of rough turning is less than or equal to 0.5mm/r, the feeding speed of finish turning is less than or equal to 0.3mm/r, the cutting depth of the rough turning is less than or equal to 1.5mm, and the cutting depth of the finish turning is less than or equal to 0.5 mm;
and 5: and (5) finishing the processing, and taking down the processed air-cooled turbogenerator rotor.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a turning method for a single-stage blade of an air-cooled steam turbine generator, which can improve the turning quality of the excircle of the single-stage blade of a rotor of the air-cooled steam turbine generator, improve the qualification rate and reduce the cost.
Drawings
Figure 1 shows a selected tool.
Fig. 2 is a schematic view of the feed direction of the tool according to different blades.
The direction indicated by the arrow in the figure is the cutting tool feed direction.
FIG. 3 is a schematic view of a blade setting area provided by the present invention.
The area indicated by the arrow in the figure is the tool setting determining area.
FIG. 4 is a schematic diagram of the present invention for providing the machining of single-stage blades of an air-cooled steam turbine generator.
FIG. 5 is a schematic view showing the feeding direction of a machining tool in machining a single-stage blade of an air-cooled turbogenerator according to the present invention; in the figure, the arrow of reference numeral 1 indicates the tool feed direction; the arrow marked 2 in the figure indicates the rotation direction of the air-cooled turbogenerator rotor on the lathe.
Reference numerals: 1. the feeding direction of the cutter is 2, the rotating direction of the rotor of the air-cooled turbogenerator on the lathe is 3, the single-stage blades of the rotor are 4, the fan seat of the rotor is 5, and the rotor of the air-cooled turbogenerator is
Detailed Description
In order to make the present invention more comprehensible, the following detailed description is made with reference to preferred embodiments and accompanying drawings, and as shown in fig. 1, 2, 3, 4, and 5, a turning method for an air-cooled turbine generator rotor blade is provided, including the following steps:
step 1: preparing a cutter, 3 square blades and 1 handle of a cutter handle; the air-cooled turbogenerator rotor 5 to be processed is clamped on a lathe, and the invention provides a schematic diagram of the processing of the air-cooled turbogenerator rotor single-stage blade 3 as shown in figure 4. Setting zero point, installing a new blade on the tool handle for fastening, and then preparing to process the excircle phi 1081.8 +/-0.05 mm grade of the rotor single-stage blade 3 by taking the excircle of the fan seat 4 of the rotor 5 of the air-cooled turbonator as a reference. The arrow of reference numeral 1 in fig. 5 indicates the tool feed direction; the arrow 2 in fig. 5 indicates the direction of rotation of the air-cooled turbogenerator rotor on the lathe.
Determining the feeding direction of a cutting tool, confirming the feeding direction of the cutting tool before processing, and confirming the feeding direction of the cutting tool according to the blade assembly form; when the big head end of the blade is close to the central line of the rotor shaft of the air-cooled turbogenerator, the reverse direction line of the extension line of the advancing cutter and the arc line of the small head end of the rotor blade of the generator form an acute angle; when the small end of the blade is close to the central line of the rotor shaft of the air-cooled turbogenerator, the reverse direction line of the extension line of the advancing cutter and the arc line of the large end of the rotor blade of the generator form an acute angle.
And 3, determining a tool setting area, and setting a tool before machining the excircle of the generator rotor blade. Typically, after the blades are mounted to the fan base, the blades must be set in the region of the two ends of the blades.
And 4, selecting proper processing parameters in the processing. The turning parameters were as follows: the rotating speed of the lathe is 15-20r/min, the rough turning feed is less than or equal to 0.5mm/r, the fine turning feed is less than or equal to 0.3mm/r, the rough turning cutting depth is less than or equal to 1.5mm, and the fine turning cutting depth is less than or equal to 0.5 mm.
During rough turning, a first cutter is turned on the excircle of the blade, so that the allowance of turning the excircle to be basically consistent during excircle processing. The specific cutting parameters are as follows: the rotating speed is 15r/min, and the feeding speed is 0.5 mm/r. And after the machining of the cutter and the blade is finished, the machining condition of the second cutter is checked, and the second cutter is machined and roughly lathed, wherein the purpose of roughly lathing the second cutter is to remove machining allowance as much as possible. But the cutting depth is less than or equal to 1.5mm, and other cutting parameters are roughly lathed by the first tool.
Finish turning: and (3) replacing the blade, and resetting the tool, wherein the tool setting area is as shown in figure 3, and the area indicated by an arrow in the figure is the tool setting determining area. The finish machining cutting parameters are as follows: the rotating speed is 20r/min, and the feeding speed is 0.3 mm/r. After the processing is finished, measuring the excircle dimension of the moving blade
And 5: and (5) finishing the machining, and taking out the machined air-cooled turbogenerator rotor blade.
While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.
Claims (1)
1. A turning method for single-stage blades of an air-cooled steam turbine generator is characterized by comprising the following steps:
step 1: preparing a cutter, a square blade and a cutter handle; clamping a rotor of an air-cooled turbonator to be processed on a lathe, and taking the excircle of a fan seat of the rotor of the air-cooled turbonator as a reference;
step 2: determining the feeding direction of a cutting tool, determining the feeding direction of the cutting tool before processing, and determining the feeding direction of the cutting tool according to the blade assembly form on a rotor fan seat of an air-cooled steam turbine generator; when the big end of the blade is close to the central line of the rotor shaft of the air-cooled turbogenerator, the reverse direction line of the extension line of the advancing cutter and the arc line of the small end of the blade of the generator rotor form an acute angle; when the small end of the blade is close to the central line of the rotor shaft of the air-cooled turbogenerator, the reverse direction line of the extension line of the advancing cutter and the arc line of the large end of the rotor blade of the generator form an acute angle;
and step 3: determining a tool setting area, wherein tool setting needs to be carried out before machining the excircle of the generator rotor blade; the tool setting areas are required to be arranged at two end parts of the blade;
and 4, step 4: starting turning, and selecting proper processing parameters in the processing; the turning parameters were as follows: the rotating speed of the lathe is 15-20r/min, the feeding speed of rough turning is less than or equal to 0.5mm/r, the feeding speed of finish turning is less than or equal to 0.3mm/r, the cutting depth of the rough turning is less than or equal to 1.5mm, and the cutting depth of the finish turning is less than or equal to 0.5 mm;
and 5: and (5) finishing the processing, and taking down the processed air-cooled turbogenerator rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911052297.5A CN110883342B (en) | 2019-10-31 | 2019-10-31 | Processing method of single-stage blade of air-cooled steam turbine generator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911052297.5A CN110883342B (en) | 2019-10-31 | 2019-10-31 | Processing method of single-stage blade of air-cooled steam turbine generator |
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| CN110883342A CN110883342A (en) | 2020-03-17 |
| CN110883342B true CN110883342B (en) | 2021-03-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3392610A (en) * | 1964-06-12 | 1968-07-16 | Reserve Mining Co | Machine and method for repairing rotor shafts |
| JPS60141401A (en) * | 1983-12-26 | 1985-07-26 | Toshiba Corp | Shrink fitting processing device for turbine rotor |
| CN101011748A (en) * | 2007-02-08 | 2007-08-08 | 四川东风电机厂有限公司 | Method of processing through flow turbine entrance bucket axle journal |
| CN201371366Y (en) * | 2009-03-16 | 2009-12-30 | 常州市三维技术成套设备有限公司 | Processing fixture for 7-fork blade root pin hole of steam turbine |
| CN104043859B (en) * | 2013-12-03 | 2016-09-07 | 重庆江增船舶重工有限公司 | The processing method of the axial taper pin-hole of Small Distance on the multistage wheel disc of turbine rotor |
| CN106217133A (en) * | 2016-07-28 | 2016-12-14 | 哈尔滨汽轮机厂有限责任公司 | A kind of steam turbine rotor blade assembling final blage pin-and-hole processing alignment device and method |
| DE102017115089B4 (en) * | 2017-07-06 | 2019-04-25 | Klaus Union Gmbh & Co. Kg | Method of manufacturing a rotor for a screw pump |
| CN207234628U (en) * | 2017-09-30 | 2018-04-13 | 洛阳万有力科技有限公司 | A kind of assembling device of rotor and armature spindle with the turning function that presses |
| CN108031866A (en) * | 2017-12-08 | 2018-05-15 | 宁夏共享精密加工有限公司 | A kind of method for turning for reducing hydraulic turbine crown surface roughness |
| CN209006686U (en) * | 2018-10-19 | 2019-06-21 | 德尔福（上海）动力推进***有限公司 | A kind of truning fixture of camshaft phase adjuster rotor |
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