CN102829699A - 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
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- CN102829699A CN102829699A CN2012102758217A CN201210275821A CN102829699A CN 102829699 A CN102829699 A CN 102829699A CN 2012102758217 A CN2012102758217 A CN 2012102758217A CN 201210275821 A CN201210275821 A CN 201210275821A CN 102829699 A CN102829699 A CN 102829699A
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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 that is used for gap between MEASUREMENT OF STEAM turbine wheel movable vane and the cylinder inner wall.
Background technology
Steam turbine is the rotary power machinery that the energy conversion of steam is become mechanical work, behind the steam entering steam turbine from boiler, passes through the nozzle and the movable vane of a series of loop configurations successively, the heat energy of steam is converted into the mechanical energy of turbine rotor rotation.Steam carries out energy conversion by different way in steam turbine, just constituted the steam turbine of different operating principle.Form by rotating part and two aspects of stationary part.Rotor comprises main shaft, impeller, movable vane and shaft coupling etc., and stator comprises admission part, cylinder, dividing plate and parts such as static cascade, packing and bearing.
Cylinder is the shell of steam turbine, and its effect is that the flow passage component of steam turbine and atmosphere are separated, and forms the steam chest of sealing, guarantees that steam in the inner transfer process of accomplishing energy of steam turbine, is installed with parts such as nozzle box, dividing plate, diaphragm housing ring in the cylinder; Pipeline such as cylinder connecting admission, steam discharge outward, draw gas.The height of cylinder, intermediate pressure section generally adopt alloy steel or cast carbon steel structure, and low pressure stage can be according to capacity and structural requirement, the welded structure that adopts cast structure or welded by simple foundry goods, shaped steel and steel plate.Movable vane is installed on impeller of rotor or the rotary drum, accepts the high velocity air that nozzle blade cascade penetrates, and converts the kinetic energy of steam to mechanical energy, makes the rotor rotation of steam turbine.Blade generally is made up of blade profile, three parts of blade root and leaf top.Blade profile is the working portion of blade, constitutes the steam flow passage between the airfoil portion of adjacent blades divides, and vapor stream is out-of-date to convert kinetic energy to mechanical energy.By the Changing Pattern of blade profile part xsect, blade can be divided into uniform cross section prismatic blade, variable cross section prismatic blade, twisted blade, twisted blade.
In the steam turbine assembling process; Dynamic clearance between turbine rotor movable vane and the cylinder inner wall at present can't between measure, the measuring method that adopts at present is with the static clearance between survey instrument MEASUREMENT OF STEAM turbine wheel movable vane such as patch and the cylinder inner wall before piecing together cylinder.Adopt this method to have two kinds of shortcomings: 1. can only see that static position " lead to, end " can't obtain the accurate numerical value of each impeller clearance; 2. the rigging error that produces in the time of can't knowing the assembly cylinder is to the influence in gap.Therefore at present this can only MEASUREMENT OF STEAM turbine wheel movable vane and cylinder inner wall between the method for static clearance radial play, symmetry demanding steam turbine assembling occasion high for accuracy requirement be difficult to be suitable for.And still do not have a kind of good mode accurately to measure at present to the dynamic clearance between turbine rotor movable vane and the cylinder inner wall.
Summary of the invention
The shortcoming of prior art the object of the present invention is to provide a kind of gap measuring apparatus in view of the above, adopts this gap measuring apparatus to measure the dynamic clearance between turbine rotor movable vane and the cylinder inner wall.
For realizing above-mentioned purpose and other relevant purposes; The present invention provides the device in a kind of MEASUREMENT OF STEAM turbine movable vane and cylinder inner wall gap; It comprises a coupling sleeve, and the outer peripheral face of said coupling sleeve is provided with connecting thread, is provided with the sounding rod that can move around in the said coupling sleeve; The front end of said sounding rod stretches out from the front end of said coupling sleeve; The rear end of said sounding rod is connected with a dial gauge, and said dial gauge is fixedly connected with said coupling sleeve, said sounding rod also with one this sounding rod is resetted elastic mechanism be connected.
Preferably; Said elastic mechanism comprises an end cap, and said end cap is fixedly connected with the rear end of said coupling sleeve, and said sounding rod passes said end cap and is connected with said dial gauge; Said dial gauge is fixed on the said end cap; Said sounding rod is provided with a pulling block, and said pulling block is fixedly connected with said sounding rod, is provided with a spring between said pulling block and the said end cap.
Preferably, said end cap is provided with the long chute that runs through, is provided with a removable pin in the said long chute, and said removable pin is connected with said sounding rod, and said end cap is stretched out at the two ends of said removable pin, and the outer peripheral face of said end cap and a location nut thread are connected.
Preferably, said end cap is provided with a jut, and said jut is inserted in the said coupling sleeve.
Preferably, this device also comprises a standard value guide pin bushing, the length of said standard value guide pin bushing and gap nominal value equal in length, said standard value guide pin bushing one end opening, other end sealing.
Preferably, the front end of said coupling sleeve forms a location step.
The invention also discloses a kind of method that adopts said apparatus MEASUREMENT OF STEAM turbine movable vane and cylinder inner wall gap, it comprises the steps:
1), calculates the nominal value in steam turbine movable vane and respective cylinder inwall gap according to designing requirement;
2) standard value guide pin bushing consistent of design with this gap nominal value length; The front end of coupling sleeve is reached in the standard value guide pin bushing; The openend of said standard value guide pin bushing is resisted against on the positioning step, makes the front end of sounding rod be resisted against the blind end of standard value guide pin bushing simultaneously;
3) with the dial gauge zeroing, the positioning of rotating nut makes setscrew nut be close to removable pin simultaneously;
4) on cylinder wall, with the corresponding position of movable vane measured hole is set, coupling sleeve is inserted in the measured hole, coupling sleeve is threaded with measured hole, and the positioning table terrace on the coupling sleeve is concordant with cylinder inner wall;
5) rotate turbine rotor, the numerical value change scope of observing dial gauge, thus confirm the dynamic clearance between steam turbine movable vane and the cylinder inner wall.
Preferably, said rotor drives its rotation through motor.
As stated; MEASUREMENT OF STEAM turbine movable vane of the present invention has following beneficial effect with the apparatus and method in cylinder inner wall gap: this measurement mechanism can be fixed in use with the corresponding steam turbine wall in steam turbine movable vane position on; Rotate turbine rotor then; Make the preceding end in contact of steam turbine movable vane and sounding rod, along with the variation in gap between steam turbine movable vane and the cylinder inner wall, the distance that sounding rod will constantly move and will move passes to dial gauge like this; And show through dial gauge; So just can confirm the dynamic clearance size between steam turbine movable vane and the cylinder inner wall, can further understand the influence of the rigging error that produces when piecing together cylinder, thereby can accomplish better control the dynamic clearance between steam turbine movable vane and the cylinder inner wall to the gap through the scope that dial gauge shows; And then can effectively increase work efficiency and assembly precision, be particularly useful for accuracy requirement height, the demanding steam turbine assembling of symmetry occasion.
Description of drawings
Fig. 1 is the structural representation of pick-up unit embodiment of the present invention.
The 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
Below by particular specific embodiment embodiment of the present invention is described, be familiar with this technological personage and can understand other advantages of the present invention and effect easily by the content that this instructions disclosed.
Consult Fig. 1 to notice; The appended graphic structure that illustrates of this instructions, ratio, size etc.; All only in order to cooperate the content that instructions disclosed, understanding and reading for being familiar with this technological personage, is not in order to limit the enforceable qualifications of the present invention; Event is the technical essential meaning of tool not; The adjustment of the modification of any structure, the change of proportionate relationship or size not influencing under effect that the present invention can produce and the purpose that can reach, all should still drop on disclosed technology contents and get in the scope that can contain.Simultaneously; Quoted in this instructions as " on ", D score, " left side ", " right side ", " centre " reach the term of " " etc.; Also be merely be convenient to narrate clear, but not in order to limit the enforceable scope of the present invention, the change of its relativeness or adjustment; Under no essence change technology contents, when also being regarded as the enforceable category of the present invention.
As shown in Figure 1, the present invention provides a kind of device that is used for MEASUREMENT OF STEAM turbine movable vane and cylinder inner wall gap, and this device comprises a coupling sleeve 2, and the outer peripheral face of coupling sleeve 2 is provided with connecting thread.Be provided with the sounding rod 3 that can move around in the coupling sleeve 2; The front end of sounding rod 3 stretches out from the front end of coupling sleeve 2; The rear end of sounding rod 3 is connected with a dial gauge 7, and sounding rod 3 is connected with the measuring staff of dial gauge 7, and the watchcase of dial gauge 7 is fixedly connected with coupling sleeve; The pointer flickered when sounding rod 3 moves around, just can to drive dial gauge 7 like this, so just can confirm the distance that sounding rod 3 moves through the reading of dial gauge.
But sounding rod 3 also is connected with an elastic mechanism, 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 the coupling sleeve 2, and jut 10 can be fixedly connected with the mode of coupling sleeve 2 through welding or clamping.Sounding rod 3 passes end cap 11 and is connected with dial gauge 7, and dial gauge 7 is fixed on the 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 the end cap 11.When sounding rod 3 stressed moving inward, spring 9 is compressed, and when forces, sounding rod 3 can automatically reset under the effect of spring 9, so this elastic construction can make sounding rod 3 realize automatically reseting.
Benchmark during for the ease of definite the measurement, this device also comprises a standard value guide pin bushing 1, an end opening of standard value guide pin bushing 1, other end sealing.The length of this standard value guide pin bushing 1 and gap nominal value equal in length, the gap nominal value just is meant the theoretical value of gap length between steam turbine movable vane and the cylinder inner wall, can make zero to dial gauge 7 according to this gap nominal value, thereby confirm measuring basis.This standard value guide pin bushing 1 in use; Can be at first the front end of coupling sleeve 2 be reached in the standard value guide pin bushing 1; The front end of sounding rod 3 is resisted against on the blind end of standard value guide pin bushing 1, locatees for ease simultaneously, can form a location step 8 at the front end of coupling sleeve 2; And the openend that makes the standard value guide pin bushing is resisted against on the positioning step 8, and this moment can be with dial gauge 7 zeroings.
Make sounding rod 3 location after dial gauge 7 zeroings for ease; End cap 11 is provided with the long chute that runs through; Be provided with a removable pin 6 in the long chute, removable pin 6 is fixedly connected with sounding rod 3, and 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 location nut 5, and setscrew nut 5 is positioned at the front side of removable pin 6.After dial gauge 7 zeroings, 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 can sounding rod 3 be positioned.
Adopt the method in said apparatus MEASUREMENT OF STEAM turbine movable vane and cylinder inner wall gap, it comprises the steps:
1), calculates the nominal value in steam turbine movable vane and respective cylinder inwall gap according to designing requirement;
2) standard value guide pin bushing 1 consistent of design with this gap nominal value length; The front end of coupling sleeve 2 is reached in the standard value guide pin bushing 1; The openend of standard value guide pin bushing 1 is resisted against on the positioning step 8, makes the front end of sounding rod 3 be resisted against the blind end of standard value guide pin bushing 1 simultaneously;
3) with dial gauge 7 zeroings, positioning of rotating nut 5 makes setscrew nut 5 be close to removable pin 6 simultaneously;
4) on cylinder wall, with the corresponding position of movable vane measured hole is set, coupling sleeve 2 is inserted in the measured hole, coupling sleeve 2 is threaded with measured hole, and the positioning table terrace 8 on the coupling sleeve should be concordant with cylinder inner wall;
5) drive the turbine rotor rotation through motor, the numerical value change scope of observing dial gauge 7, thus confirm the dynamic clearance between steam turbine movable vane and the cylinder inner wall.
This measurement mechanism can be fixed on the steam turbine wall corresponding with steam turbine movable vane position in use; Rotate turbine rotor then; Make the preceding end in contact of steam turbine movable vane and sounding rod, along with the variation in gap between steam turbine movable vane and the cylinder inner wall, the distance that sounding rod will constantly move and will move passes to dial gauge like this; And show through dial gauge; So just can confirm the dynamic clearance size between steam turbine movable vane and the cylinder inner wall, can further understand the influence of the rigging error that produces when piecing together cylinder, thereby can accomplish better control the dynamic clearance between steam turbine movable vane and the cylinder inner wall to the gap through the scope that dial gauge shows; And then can effectively increase work efficiency and assembly precision, be particularly useful for accuracy requirement height, the demanding steam turbine assembling of symmetry occasion.There have this measurement mechanism also to have again to be simple in structure, compact, light and handy, advantage easy to use.In sum, the present invention has effectively overcome various shortcoming of the prior art and the tool high industrial utilization.
The foregoing description is illustrative principle of the present invention and effect thereof only, but not is used to limit the present invention.Any be familiar with this technological personage all can be under spirit of the present invention and category, the foregoing description is modified or is changed.Therefore, have common knowledge the knowledgeable in the affiliated such as technical field, must contain by claim of the present invention not breaking away from all equivalence modifications of being accomplished under disclosed spirit and the technological thought or changing.
Claims (8)
1. the device in MEASUREMENT OF STEAM turbine movable vane and cylinder inner wall gap; It is characterized in that: it comprises a coupling sleeve, and the outer peripheral face of said coupling sleeve is provided with connecting thread, is provided with the sounding rod that can move around in the said coupling sleeve; The front end of said sounding rod stretches out from the front end of said coupling sleeve; The rear end of said sounding rod is connected with a dial gauge, and said dial gauge is fixedly connected with said coupling sleeve, said sounding rod also with one this sounding rod is resetted elastic mechanism be connected.
2. the device in MEASUREMENT OF STEAM turbine movable vane according to claim 1 and cylinder inner wall gap; It is characterized in that: said elastic mechanism comprises an end cap, and said end cap is fixedly connected with the rear end of said coupling sleeve, and said sounding rod passes said end cap and is connected with said dial gauge; Said dial gauge is fixed on the said end cap; Said sounding rod is provided with a pulling block, and said pulling block is fixedly connected with said sounding rod, is provided with a spring between said pulling block and the said end cap.
3. the device in MEASUREMENT OF STEAM turbine movable vane according to claim 2 and cylinder inner wall gap; It is characterized in that: said end cap is provided with the long chute that runs through; Be provided with a removable pin in the said long chute; Said removable pin is connected with said sounding rod, and said end cap is stretched out at the two ends of said removable pin, and the outer peripheral face of said end cap is connected with a location nut thread.
4. the device in MEASUREMENT OF STEAM turbine movable vane according to claim 3 and cylinder inner wall gap is characterized in that: said end cap is provided with a jut, and said jut is inserted in the said coupling sleeve.
5. the device in MEASUREMENT OF STEAM turbine movable vane according to claim 4 and cylinder inner wall gap; It is characterized in that: this device also comprises a standard value guide pin bushing; The length of said standard value guide pin bushing and gap nominal value equal in length, said standard value guide pin bushing one end opening, other end sealing.
6. the device in MEASUREMENT OF STEAM turbine movable vane according to claim 5 and cylinder inner wall gap is characterized in that: the front end of said coupling sleeve forms a location step.
7. a method that adopts claim 5 said measurement device steam turbine movable vane and cylinder inner wall gap is characterized in that it comprises the steps:
1), calculates the nominal value in steam turbine movable vane and respective cylinder inwall gap according to designing requirement;
2) standard value guide pin bushing consistent of design with this gap nominal value length; The front end of coupling sleeve reaches in the standard value guide pin bushing; The openend of said standard value guide pin bushing is resisted against on the positioning step, makes the front end of sounding rod be resisted against the blind end of standard value guide pin bushing simultaneously;
3) with the dial gauge zeroing, the positioning of rotating nut makes setscrew nut be close to removable pin simultaneously;
4) on cylinder wall, with the corresponding position of movable vane measured hole is set, coupling sleeve is inserted in the measured hole, coupling sleeve is threaded with measured hole, the positioning table terrace on the coupling sleeve is concordant with cylinder inner wall;
5) rotate turbine rotor, the numerical value change scope of observing dial gauge, thus confirm the dynamic clearance between steam turbine movable vane and the cylinder inner wall.
8. the method in MEASUREMENT OF STEAM turbine movable vane according to claim 7 and cylinder inner wall gap is characterized in that: said rotor drives its rotation through motor.
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 |
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| 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 |
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| CN102829699A true CN102829699A (en) | 2012-12-19 |
| CN102829699B CN102829699B (en) | 2015-06-17 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006723A (en) * | 2014-06-04 | 2014-08-27 | 无锡动力工程股份有限公司 | Tool for detecting gap at position of diesel engine body cam hole |
| CN105371995A (en) * | 2015-12-04 | 2016-03-02 | 哈尔滨汽轮机厂有限责任公司 | Dynamometer with self-check function |
| CN108286921A (en) * | 2017-12-22 | 2018-07-17 | 东方电气集团东方汽轮机有限公司 | A kind of detection instrument of steam turbine entirety shipping module |
| CN111928769A (en) * | 2020-08-11 | 2020-11-13 | 中广核核电运营有限公司 | Distance measuring device |
| CN112097604A (en) * | 2020-08-17 | 2020-12-18 | 中广核核电运营有限公司 | Through-flow clearance measurement system and device for generator end assembly |
| CN114459307A (en) * | 2022-02-23 | 2022-05-10 | 桂林广陆数字测控有限公司 | Digital display dial gauge |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104006723A (en) * | 2014-06-04 | 2014-08-27 | 无锡动力工程股份有限公司 | Tool for detecting gap at position of diesel engine body cam hole |
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| CN108286921A (en) * | 2017-12-22 | 2018-07-17 | 东方电气集团东方汽轮机有限公司 | A kind of detection instrument of steam turbine entirety shipping module |
| CN111928769A (en) * | 2020-08-11 | 2020-11-13 | 中广核核电运营有限公司 | Distance measuring device |
| CN112097604A (en) * | 2020-08-17 | 2020-12-18 | 中广核核电运营有限公司 | Through-flow clearance measurement system and device for generator end assembly |
| 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 |
| CN114459307A (en) * | 2022-02-23 | 2022-05-10 | 桂林广陆数字测控有限公司 | Digital display dial gauge |
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| CN102829699B (en) | 2015-06-17 |
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