CN102829699B - Device and method for measuring gap between steam turbine movable blades and cylinder inner wall - Google Patents
Device and method for measuring gap between steam turbine movable blades and cylinder inner wall Download PDFInfo
- Publication number
- CN102829699B CN102829699B CN201210275821.7A CN201210275821A CN102829699B CN 102829699 B CN102829699 B CN 102829699B CN 201210275821 A CN201210275821 A CN 201210275821A CN 102829699 B CN102829699 B CN 102829699B
- Authority
- CN
- China
- Prior art keywords
- coupling sleeve
- sounding rod
- end cap
- wall
- cylinder inner
- 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.)
- Active
Links
Landscapes
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention provides a device for measuring gaps between steam turbine movable blades and a cylinder inner wall. The device comprises a coupling sleeve, connecting screw threads disposed on a periphery surface of the coupling sleeve, and a measuring rod which can be move back and forth disposed in the coupling sleeve. A front end of the measuring rod stretches out from a front end of the coupling sleeve, and a rear end of the measuring rod is connected with a dial indicator. The dial indicator is solidly connected with the coupling sleeve. The measuring rod is also connected with an elastic mechanism which can make the measuring rod reset. The device can determine dynamic gaps between the steam turbine movable blades and the cylinder inner wall, so that the dynamic gaps between the steam turbine movable blades and the cylinder inner wall can be better controlled, and then work efficiency and assembly accuracy can be effectively improved. The device is especially suitable to steam turbine assembling occasions which have demanding accuracy requirement and demanding symmetry requirement.
Description
Technical field
The present invention relates to a kind of gap measuring apparatus, particularly relate to a kind of device for gap between MEASUREMENT OF STEAM turbine wheel movable vane and cylinder inner wall.
Background technology
Steam turbine is the rotary power machinery energy conversion of steam being become mechanical work, after entering steam turbine, successively through nozzle and the movable vane of a series of loop configurations, is the mechanical energy that turbine rotor rotates by the thermal energy of steam from the steam of boiler.Steam, in steam turbine, carries out energy conversion by different way, just constitutes the steam turbine of different operating principle.Be made up of rotating part and stationary part two aspects.Rotor comprises main shaft, impeller, movable vane and shaft coupling etc., and stator comprises the parts such as admission part, cylinder, dividing plate and static cascade, packing and bearing.
Cylinder is the shell of steam turbine, and its effect is separated the flow passage component of steam turbine and air, forms the steam chest closed, and ensures that steam completes the transfer process of energy in steam turbine inside, is installed with the parts such as nozzle box, dividing plate, diaphragm housing ring in cylinder; The pipeline such as be connected to admission, steam discharge outside cylinder, draw gas.The height of cylinder, intermediate pressure section generally adopt alloy steel or cast carbon steel structure, and low pressure stage according to capacity and structural requirement, can adopt cast structure or the welded structure by simple foundry goods, shaped steel and Plate Welding.Movable vane is arranged on impeller of rotor or rotary drum, accepts the high velocity air of nozzle blade cascade injection, the kinetic energy of steam is converted to mechanical energy, the rotor of steam turbine is rotated.Blade is generally made up of blade profile, blade root and three, leaf top part.Blade profile is the working portion of blade, and form steam flow passage between the airfoil portion of adjacent blades divides, vapor stream is out-of-date converts kinetic energy to mechanical energy.By the Changing Pattern of blade profile partial cross sectional, blade can be divided into uniform cross section prismatic blade, variable cross section prismatic blade, twisted blade, twisted blade.
In steam turbine assembling process, dynamic clearance between turbine rotor movable vane and cylinder inner wall at present cannot between measure, the measuring method adopted at present is by the static clearance between survey instrument MEASUREMENT OF STEAM turbine wheel movable vane and cylinder inner wall such as patch before spelling cylinder.Adopt and there are two kinds of shortcomings in this way: 1. can only see that static position " lead to, stop " cannot obtain the exact value of each impeller clearance; 2. the rigging error produced when cannot know and spell cylinder is on the impact in gap.Therefore thisly at present can only require that high steam turbine assembles occasion and is difficult to be suitable for by the method for static clearance radial play between MEASUREMENT OF STEAM turbine wheel movable vane and cylinder inner wall, symmetry high for accuracy requirement.And still do not have a kind of good mode accurately can to measure the dynamic clearance between turbine rotor movable vane and cylinder inner wall at present.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of gap measuring apparatus, adopts this gap measuring apparatus can to measure the dynamic clearance between turbine rotor movable vane and cylinder inner wall.
For achieving the above object and other relevant objects, the invention provides a kind of device measuring Steam Turbines and cylinder inner wall gap, it comprises a coupling sleeve, the outer peripheral face of described coupling sleeve is provided with connecting thread, a sounding rod that can move around is provided with in described coupling sleeve, the front end of described sounding rod is stretched out from the front end of described coupling sleeve, the rear end of described sounding rod is connected with a dial gauge, described dial gauge is fixedly connected with described coupling sleeve, and described sounding rod is also connected with an elastic mechanism that this sounding rod can be made to reset.
Preferably, described elastic mechanism comprises an end cap, described end cap is fixedly connected with the rear end of described coupling sleeve, described sounding rod is connected with described dial gauge through described end cap, described dial gauge is fixed on described end cap, described sounding rod is provided with a pulling block, and described pulling block is fixedly connected with described sounding rod, is provided with a spring between described pulling block and described end cap.
Preferably, described end cap is provided with a long chute run through, and be provided with a removable pin in described long chute, described removable pin is connected with described sounding rod, and described end cap is stretched out at the two ends of described removable pin, and the outer peripheral face and of described end cap is located nut thread and is connected.
Preferably, described end cap is provided with a jut, and described jut is inserted in described coupling sleeve.
Preferably, this device also comprises a standard value guide pin bushing, and the length of described standard value guide pin bushing is equal with gap nominal value length, described standard value guide pin bushing one end open, and the other end is closed.
Preferably, the front end of described coupling sleeve forms a positioning step.
The invention also discloses a kind of method adopting said apparatus to measure Steam Turbines and cylinder inner wall gap, it comprises the steps:
1) according to designing requirement, the nominal value in Steam Turbines and respective cylinder inwall gap is calculated;
2) the standard value guide pin bushing that design one is consistent with this gap nominal value length, the front end of coupling sleeve is reached in standard value guide pin bushing, the openend of described standard value guide pin bushing is resisted against on positioning step, makes the front end of sounding rod be resisted against the blind end of standard value guide pin bushing simultaneously;
3) dial gauge is returned to zero, rotate setscrew nut simultaneously, make setscrew nut be close to removable pin;
4) corresponding to movable vane on cylinder wall position arranges measured hole, and inserted by coupling sleeve in measured hole, coupling sleeve is threaded with measured hole, and the positioning table terrace on coupling sleeve is concordant with cylinder inner wall;
5) rotate turbine rotor, observe the numerical value change scope of dial gauge, thus determine the dynamic clearance between Steam Turbines and cylinder inner wall.
Preferably, by motor driving, it rotates described rotor.
As mentioned above, measurement Steam Turbines of the present invention has following beneficial effect with the apparatus and method in cylinder inner wall gap: this measurement mechanism can be fixed on the Turbine Steam casing wall corresponding with Steam Turbines position in use, then turbine rotor is rotated, make the front end in contact of Steam Turbines and sounding rod, like this along with the change in gap between Steam Turbines and cylinder inner wall, sounding rod constantly will move and the distance of movement is passed to dial gauge, and shown by dial gauge, so just by dial gauge display scope determination Steam Turbines and cylinder inner wall between dynamic clearance size, the rigging error produced when can understand spelling cylinder is further on the impact in gap, thus better control can be accomplished to the dynamic clearance between Steam Turbines and cylinder inner wall, and then can effectively increase work efficiency and assembly precision, be particularly useful for accuracy requirement high, symmetry requires high steam turbine assembling occasion.
Accompanying drawing explanation
Fig. 1 is the structural representation of pick-up unit embodiment of the present invention.
Element numbers explanation
1 standard value guide pin bushing
2 coupling sleeves
3 sounding rods
4 pulling blocks
5 setscrew nuts
6 removable pins
7 dial gauges
8 limited steps
9 springs
10 juts
11 end caps
Embodiment
By particular specific embodiment, embodiments of the present invention are described below, person skilled in the art scholar the content disclosed by this instructions can understand other advantages of the present invention and effect easily.
Consult Fig. 1 to notice, structure, ratio, size etc. that this instructions institute accompanying drawings illustrates, content all only in order to coordinate instructions to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the present invention, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the present invention can produce and the object that can reach, still all should drop on disclosed technology contents and obtain in the scope that can contain.Simultaneously, quote in this instructions as " on ", D score, "left", "right", " centre " and " one " etc. term, also only for ease of understanding of describing, and be not used to limit the enforceable scope of the present invention, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the present invention.
As shown in Figure 1, the invention provides a kind of device for measuring Steam Turbines and cylinder inner wall gap, this device comprises a coupling sleeve 2, and the outer peripheral face of coupling sleeve 2 is provided with connecting thread.A sounding rod that can move around 3 is provided with in coupling sleeve 2, the front end of sounding rod 3 is stretched out from the front end of coupling sleeve 2, the rear end of sounding rod 3 is connected with a dial gauge 7, sounding rod 3 is connected with the measuring staff of dial gauge 7, the watchcase of dial gauge 7 is fixedly connected with coupling sleeve, just can drive dial gauge 7 like this pointer flickered when sounding rod 3 moves around, so just by the distance of reading determination sounding rod 3 movement of dial gauge.
Sounding rod 3 also can be connected by elastic mechanism with one, and this elastic mechanism comprises an end cap 11, and end cap 11 is fixedly connected with the rear end of coupling sleeve 2.For the ease of connecting, end cap 11 is provided with a jut 10, and jut 10 is inserted in coupling sleeve 2, and jut 10 can with coupling sleeve 2 by weld or the mode of clamping is fixed and is connected.Sounding rod 3 is connected with dial gauge 7 through end cap 11, and dial gauge 7 is fixed on end cap 11, and sounding rod 3 is provided with a pulling block 4, and pulling block 4 is fixedly connected with sounding rod 3, is provided with a spring 9 between pulling block 4 and end cap 11.When sounding rod 3 is stressed move inward time, spring 9 is compressed, and when external force is eliminated, sounding rod 3 can automatically reset under the effect of spring 9, therefore this elastic construction can make sounding rod 3 realize automatically reset.
For the ease of determining benchmark when measuring, this device also comprises a standard value guide pin bushing 1, the one end open of standard value guide pin bushing 1, and the other end is closed.The length of this standard value guide pin bushing 1 is equal with gap nominal value length, and gap nominal value just refers to the theoretical value of gap length between Steam Turbines and cylinder inner wall, can make zero, thus determine measuring basis according to this gap nominal value to dial gauge 7.This standard value guide pin bushing 1 in use, can first the front end of coupling sleeve 2 be reached in standard value guide pin bushing 1, the front end of sounding rod 3 is made to be resisted against on the blind end of standard value guide pin bushing 1, conveniently locate simultaneously, a positioning step 8 can be formed in the front end of coupling sleeve 2, and make the openend of standard value guide pin bushing be resisted against on positioning step 8, now dial gauge 7 can be returned to zero.
Conveniently dial gauge 7 makes sounding rod 3 locate after returning to zero, end cap 11 is provided with a long chute run through, a removable pin 6 is provided with in long chute, removable pin 6 is fixedly connected with sounding rod 3, end cap 11 is stretched out at the two ends of removable pin 6, the outer peripheral face of end cap 11 is threaded with a setscrew nut 5, and setscrew nut 5 is positioned at the front side of removable pin 6.After dial gauge 7 returns to zero, rotatable setscrew nut 5, makes setscrew nut 5 be close to removable pin 6, because removable pin 6 is limited by setscrew nut 5, so just sounding rod 3 can be positioned.
Adopt said apparatus to measure the method in Steam Turbines and cylinder inner wall gap, it comprises the steps:
1) according to designing requirement, the nominal value in Steam Turbines and respective cylinder inwall gap is calculated;
2) the standard value guide pin bushing 1 that design one is consistent with this gap nominal value length, the front end of coupling sleeve 2 is reached in standard value guide pin bushing 1, make the openend of standard value guide pin bushing 1 be resisted against on positioning step 8, make the front end of sounding rod 3 be resisted against the blind end of standard value guide pin bushing 1 simultaneously;
3) dial gauge 7 is returned to zero, rotate setscrew nut 5 simultaneously, make setscrew nut 5 be close to removable pin 6;
4) corresponding to movable vane on cylinder wall position arranges measured hole, inserts in measured hole by coupling sleeve 2, and coupling sleeve 2 is threaded with measured hole, and the positioning table terrace 8 on coupling sleeve should be concordant with cylinder inner wall;
5) drive turbine rotor to rotate by motor driving, observe the numerical value change scope of dial gauge 7, thus determine the dynamic clearance between Steam Turbines and cylinder inner wall.
This measurement mechanism can be fixed on the Turbine Steam casing wall corresponding with Steam Turbines position in use, then turbine rotor is rotated, make the front end in contact of Steam Turbines and sounding rod, like this along with the change in gap between Steam Turbines and cylinder inner wall, sounding rod constantly will move and the distance of movement is passed to dial gauge, and shown by dial gauge, so just by dial gauge display scope determination Steam Turbines and cylinder inner wall between dynamic clearance size, the rigging error produced when can understand spelling cylinder is further on the impact in gap, thus better control can be accomplished to the dynamic clearance between Steam Turbines and cylinder inner wall, and then can effectively increase work efficiency and assembly precision, be particularly useful for accuracy requirement high, symmetry requires high steam turbine assembling occasion.This measurement mechanism is had also to have structure simpler, compact, light and handy, advantage easy to use.In sum, the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (2)
1. measure the device in Steam Turbines and cylinder inner wall gap for one kind, it is characterized in that: it comprises a coupling sleeve, the outer peripheral face of described coupling sleeve is provided with connecting thread, a sounding rod that can move around is provided with in described coupling sleeve, the front end of described sounding rod is stretched out from the front end of described coupling sleeve, the rear end of described sounding rod is connected with a dial gauge, and described dial gauge is fixedly connected with described coupling sleeve, and described sounding rod is also connected with an elastic mechanism that this sounding rod can be made to reset;
Described elastic mechanism comprises an end cap, described end cap is fixedly connected with the rear end of described coupling sleeve, described sounding rod is connected with described dial gauge through described end cap, described dial gauge is fixed on described end cap, described sounding rod is provided with a pulling block, described pulling block is fixedly connected with described sounding rod, is provided with a spring between described pulling block and described end cap;
Described end cap is provided with a long chute run through, and be provided with a removable pin in described long chute, described removable pin is connected with described sounding rod, and described end cap is stretched out at the two ends of described removable pin, and the outer peripheral face and of described end cap is located nut thread and is connected;
Described end cap is provided with a jut, and described jut is inserted in described coupling sleeve;
This device also comprises a standard value guide pin bushing, and the length of described standard value guide pin bushing is equal with gap nominal value length, described standard value guide pin bushing one end open, and the other end is closed; When this device uses, position corresponding to movable vane on cylinder wall arranges measured hole, is inserted by coupling sleeve in measured hole, rotates turbine rotor, the front end in contact of movable vane and sounding rod.
2. the device in measurement Steam Turbines according to claim 1 and cylinder inner wall gap, is characterized in that: the front end of described coupling sleeve forms a positioning step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210275821.7A CN102829699B (en) | 2012-08-03 | 2012-08-03 | Device and method for measuring gap between steam turbine movable blades and cylinder inner wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210275821.7A CN102829699B (en) | 2012-08-03 | 2012-08-03 | Device and method for measuring gap between steam turbine movable blades and cylinder inner wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102829699A CN102829699A (en) | 2012-12-19 |
| CN102829699B true CN102829699B (en) | 2015-06-17 |
Family
ID=47332921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210275821.7A Active CN102829699B (en) | 2012-08-03 | 2012-08-03 | Device and method for measuring gap between steam turbine movable blades and cylinder inner wall |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102829699B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006723B (en) * | 2014-06-04 | 2017-02-15 | 无锡动力工程股份有限公司 | Tool for detecting gap at position of diesel engine body cam hole |
| CN105371995B (en) * | 2015-12-04 | 2017-11-28 | 哈尔滨汽轮机厂有限责任公司 | A kind of dynamometer with self-checking function |
| CN108286921B (en) * | 2017-12-22 | 2020-03-20 | 东方电气集团东方汽轮机有限公司 | Detection tool for overall delivery module of steam turbine |
| CN112097604B (en) * | 2020-08-17 | 2022-06-24 | 中广核核电运营有限公司 | Through-flow clearance measurement system and device for generator end assembly |
| CN114459307B (en) * | 2022-02-23 | 2022-11-01 | 桂林广陆数字测控有限公司 | Digital display dial gauge |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5557099A (en) * | 1993-12-24 | 1996-09-17 | Mtu Motoren- Und Turbinen-Union Muenchen Gmbh | Signal device for turbo-engines using an optical probe with an elliptical shaped light beam |
| CN200968840Y (en) * | 2006-11-08 | 2007-10-31 | 哈尔滨汽轮机厂有限责任公司 | Apparatus for measuring screw bolt elongation amount for steam turbine assembly measurement |
| CN102023090A (en) * | 2010-10-19 | 2011-04-20 | 上海电气电站设备有限公司 | Tension test tool for end vane pin of high pressure movable vane |
| CN201903304U (en) * | 2010-12-13 | 2011-07-20 | 江苏瑞特回转支承有限公司 | Rolling way measuring device |
| CN102519347A (en) * | 2011-12-20 | 2012-06-27 | 上海电气电站设备有限公司 | Inner hole radial circle run-out detecting tool |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2464961A (en) * | 2008-10-31 | 2010-05-05 | Vestas Wind Sys As | Internally mounted load sensor for wind turbine rotor blade |
-
2012
- 2012-08-03 CN CN201210275821.7A patent/CN102829699B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5557099A (en) * | 1993-12-24 | 1996-09-17 | Mtu Motoren- Und Turbinen-Union Muenchen Gmbh | Signal device for turbo-engines using an optical probe with an elliptical shaped light beam |
| CN200968840Y (en) * | 2006-11-08 | 2007-10-31 | 哈尔滨汽轮机厂有限责任公司 | Apparatus for measuring screw bolt elongation amount for steam turbine assembly measurement |
| CN102023090A (en) * | 2010-10-19 | 2011-04-20 | 上海电气电站设备有限公司 | Tension test tool for end vane pin of high pressure movable vane |
| CN201903304U (en) * | 2010-12-13 | 2011-07-20 | 江苏瑞特回转支承有限公司 | Rolling way measuring device |
| CN102519347A (en) * | 2011-12-20 | 2012-06-27 | 上海电气电站设备有限公司 | Inner hole radial circle run-out detecting tool |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102829699A (en) | 2012-12-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102829699B (en) | Device and method for measuring gap between steam turbine movable blades and cylinder inner wall | |
| CN103884504A (en) | Axial force bearing test structure of elastic foil dynamic pressure gas thrust bearings | |
| CN101694374B (en) | Rapid detecting device and detecting method of precision of blades of gas turbine | |
| CN110397613B (en) | Method for measuring gap of compressor with integral structure | |
| CN204831259U (en) | Outside diameter detection device in axle sleeve part | |
| CN202853533U (en) | Driving bevel gear ring run-out detector | |
| CN102865802A (en) | Device for measuring coaxiality of bearing seat of aero-engine combustion chamber casing | |
| CN103759629A (en) | Device and method for measuring engine valve landing radial deflection | |
| CN101655400A (en) | Method and device for testing shellless motor | |
| CN105180786A (en) | Elevator traction machine brake wheel hop detection tool | |
| CN203672292U (en) | Shaft neck roundness detector | |
| CN102322901B (en) | Vertical Woltmann water meter | |
| CN103808239B (en) | Axle journal roundness tester | |
| CN102650556A (en) | Bearing load identification method based on strain signals of three cross sections of rotating shaft | |
| CN203587021U (en) | Roundness error detector | |
| CN208108959U (en) | A kind of connecting-rod bolts elongation measuring device | |
| CN103776495A (en) | Non-contact type gear rotational speed detection experimental device | |
| CN109374282B (en) | Rotatable test measuring mechanism | |
| CN202432969U (en) | Detection device for measuring distance between motor crank shaft flange end face and virtual sphere top | |
| CN103075987B (en) | Device for dynamically measuring aeroengine nozzle diameter | |
| CN202661026U (en) | Testing fixture for measuring verticality of hole to plane | |
| CN216115787U (en) | Special tool for measuring gland sealing clearance of flue gas turbine | |
| CN201653329U (en) | Labyrinth clearance measuring scale | |
| CN108387159A (en) | A kind of connecting-rod bolts elongation measuring device and measuring method | |
| CN112033336A (en) | Double-shaft arc type large-size involute sample plate measurement uncertainty analysis method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |