CN203843306U - Correcting device for bolt holes of split positioning pins of low-pressure outer cylinders of steam turbines - Google Patents
Correcting device for bolt holes of split positioning pins of low-pressure outer cylinders of steam turbines Download PDFInfo
- Publication number
- CN203843306U CN203843306U CN201420068124.9U CN201420068124U CN203843306U CN 203843306 U CN203843306 U CN 203843306U CN 201420068124 U CN201420068124 U CN 201420068124U CN 203843306 U CN203843306 U CN 203843306U
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- CN
- China
- Prior art keywords
- bolt hole
- correcting device
- axle
- pressure outer
- steam turbine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model relates to a correcting device for bolt holes of split positioning pins of low-pressure outer cylinders of steam turbines. The correcting device is characterized by comprising a spindle and a cutting feed mechanism, the cutting feed mechanism is mounted on the spindle and is inserted into a bolt hole, and the spindle can rotate to drive the cutting feed mechanism to rotate, so that the bolt hole can be cut and corrected. Compared with the prior art, the correcting device has the advantages of high precision and efficiency, good protectiveness, low labor intensity and the like.
Description
Technical field
The utility model relates to a kind of truing tool, especially relates to a kind of correcting device for steam turbine low-pressure outer shell split alignment pin bolt hole.
Background technology
At present 600MW steam turbine low-pressure outer shell is generally out of shape greatlyr, causes out 16, upper and lower cylinder bearing block place dowel hole dislocation while returning dress after cylinder, and maximum reaches 2mm left and right.Cannot pack into if do not processed original pin, the diameter that can only dwindle pin bolt could screw in, and does not play the effect of location.Be in operation and likely cause upper cylinder half to be subjected to displacement phenomenon, thereby cause low pressure shaft seal place to touch mill phenomenon and cause unit vibration, and can cause low pressure shaft seal gap to become to cause greatly gland packing leakage, thereby cause the vacuum of unit to decline, the lower security of unit, economy.(low pressure radial clearance only has 0.3～0.4mm left and right)
Processing method in the past generally has following two kinds of methods: 1, use expansion reamer ream; 2, progressively dig (mill) with electric hand tool.In order to upper method have that efficiency is low, labour intensity is high, the surface in hole and shape of poor quality, and can cause the axis in hole do not overlap or tilt to make pin bolt not screw in the axis of original thread on lower cylinder.
Utility model content
The purpose of this utility model is exactly to provide in order to overcome the defect that above-mentioned prior art exists the correcting device for steam turbine low-pressure outer shell split alignment pin bolt hole that a kind of precision is high, protectiveness good, labour intensity is low, efficiency is high.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of correcting device for steam turbine low-pressure outer shell split alignment pin bolt hole, it is characterized in that, comprise axle and cutting feed gear, described cutting feed gear is arranged in axle, and inserting bolt hole, described axle is rotated and is driven cutting feed gear to rotate, thereby bolt hole is cut to correction.
Described axle is fixed by locking nut screwing through after the bolt hole of lp outer casing cylinder body.
Between described locking nut and axle, be provided with pad.
Described cutting feed gear comprises the shell reamer, drive sleeve, plane bearing, spacer shell and the feed nut that are inserted in successively axle.
Described axle, pad and drive sleeve are made up of #45 steel.
Described locking nut, feed nut and spacer shell are made up of round steel.
The specification of described locking nut is M27.
Compared with prior art, the utlity model has following advantage:
1) precision is high: revised hole surface roughness can reach Ra3.2, and circularity is in 0.02mm.
2) protectiveness is good: when the dead in line of hole and original thread screws in, can not push hole wall.
3) labour intensity is low, and efficiency is high.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
In Fig. 1,1 is that axle, 2 is that low pressure (LP) cylinder machine upper cylinder half, 3 is that cylinder under low pressure (LP) cylinder machine, 4 is that pad, 5 is that locking nut, 6 is that shell reamer, 7 is that feed nut, 8 is that drive sleeve, 9 is that spacer shell, 10 is plane bearing.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.The present embodiment is implemented as prerequisite taking technical solutions of the utility model, provided detailed embodiment and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.
Embodiment
As shown in Figure 1, a kind of correcting device for steam turbine low-pressure outer shell split alignment pin bolt hole, comprise axle 1 and cutting feed gear, described cutting feed gear is arranged in axle 1, and inserting bolt hole, described axle 1 is rotated and is driven cutting feed gear to rotate, thereby bolt hole is cut to correction.
Described axle 1 is tightened fixing through after the bolt hole of lp outer casing cylinder body by locking nut 5.
Between described locking nut 5 and axle 1, be provided with pad 4.
Described cutting feed gear comprises the shell reamer 6, drive sleeve 8, plane bearing 10, spacer shell 9 and the feed nut 7 that are inserted in successively axle.
Use ratchet wrench to drive drive sleeve 8 to rotate, rotate feed nut 7 and make axial feed motion, from top to bottom the length of fit that connects pin-and-hole is cut in hole.Exit shell reamer 6, and change the slightly shell reamer of large (about 0.15mm to 0.30mm) of diameter, repeat installation fitting and cutting in-and-out bolt hole step.Through repeatedly ream equating dislocation, then reach and coordinate the pin requiring according to the processing of actual measurement aperture.
Described axle 1, pad 4 and drive sleeve 8 are made up of #45 steel.Described locking nut 5, feed nut 7 and spacer shell 9 are made up of round steel.The specification of described locking nut 5 is M27.
This device repeatedly uses and has successfully solved 600MW steam turbine low-pressure outer shell dowel hole problem of misalignment in the overhaul of granary Guo Hua power plant, Jiangsu Li Gang power plant.
Claims (6)
1. the correcting device for steam turbine low-pressure outer shell split alignment pin bolt hole, it is characterized in that, comprise axle and cutting feed gear, described cutting feed gear is arranged in axle, and inserting bolt hole, described axle is rotated and is driven cutting feed gear to rotate, thereby bolt hole is cut to correction.
2. a kind of correcting device for steam turbine low-pressure outer shell split alignment pin bolt hole according to claim 1, is characterized in that, described axle is fixed by locking nut screwing through after the bolt hole of lp outer casing cylinder body.
3. a kind of correcting device for steam turbine low-pressure outer shell split alignment pin bolt hole according to claim 2, is characterized in that, between described locking nut and axle, is provided with pad.
4. a kind of correcting device for steam turbine low-pressure outer shell split alignment pin bolt hole according to claim 1, it is characterized in that, described cutting feed gear comprises the shell reamer, drive sleeve, plane bearing, spacer shell and the feed nut that are inserted in successively axle.
5. according to a kind of correcting device for steam turbine low-pressure outer shell split alignment pin bolt hole described in claim 1 or 4, it is characterized in that, described axle, pad and drive sleeve are made up of #45 steel.
6. according to a kind of correcting device for steam turbine low-pressure outer shell split alignment pin bolt hole described in claim 2 or 3, it is characterized in that, described locking nut, feed nut and spacer shell are made up of round steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420068124.9U CN203843306U (en) | 2014-02-17 | 2014-02-17 | Correcting device for bolt holes of split positioning pins of low-pressure outer cylinders of steam turbines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420068124.9U CN203843306U (en) | 2014-02-17 | 2014-02-17 | Correcting device for bolt holes of split positioning pins of low-pressure outer cylinders of steam turbines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203843306U true CN203843306U (en) | 2014-09-24 |
Family
ID=51556366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420068124.9U Expired - Fee Related CN203843306U (en) | 2014-02-17 | 2014-02-17 | Correcting device for bolt holes of split positioning pins of low-pressure outer cylinders of steam turbines |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203843306U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110501231A (en) * | 2019-08-29 | 2019-11-26 | 中广核核电运营有限公司 | Nuclear steam turbine cylinder bolt stress and strain test macro |
-
2014
- 2014-02-17 CN CN201420068124.9U patent/CN203843306U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110501231A (en) * | 2019-08-29 | 2019-11-26 | 中广核核电运营有限公司 | Nuclear steam turbine cylinder bolt stress and strain test macro |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140924 Termination date: 20180217 |