CN114935297B - Thickness measuring device for steam turbine tile - Google Patents
Thickness measuring device for steam turbine tile Download PDFInfo
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- CN114935297B CN114935297B CN202210404031.8A CN202210404031A CN114935297B CN 114935297 B CN114935297 B CN 114935297B CN 202210404031 A CN202210404031 A CN 202210404031A CN 114935297 B CN114935297 B CN 114935297B
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- 238000005259 measurement Methods 0.000 claims description 19
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 13
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract description 4
- 239000000523 sample Substances 0.000 description 5
- 239000001996 bearing alloy Substances 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 241001422033 Thestylus Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
- G01B5/06—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
- G01B5/0004—Supports
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention relates to a thickness measuring device for a steam turbine tile, which comprises a measuring component, a positioning component and a supporting component, wherein the measuring component and the positioning component are respectively fixed at two ends of the supporting component, and the measuring component and the positioning component are mutually symmetrical along the horizontal central plane of the supporting component; the measuring assembly comprises a measuring head, one end of the measuring head is fixed with a connecting rod, and one end of the connecting rod, which is far away from the measuring head, is connected with a special nut used as a measuring reference. The steam turbine tile thickness measuring device can realize adjustable automatic alignment, eliminates human errors in the alignment process of the traditional measuring method, obviously improves measuring precision, simultaneously meets the function of measuring the thickness of the tile without removing the tile on site, and saves the workload of disassembly and installation, a large amount of investment of maintenance manpower and important driving resources for maintenance of a conventional island.
Description
Technical Field
The invention relates to the field of turbine bearing measurement, in particular to a device for measuring the thickness of a turbine tile.
Background
In the overhaul of the tilting bearing of the nuclear turbine, the thickness of the bearing bush is one of the most important monitoring parameters, and the parameter directly reflects the abrasion condition of the alloy surface of the bearing bush and is an important index for evaluating the state of the bearing bush.
In the traditional measuring process, the thickness of the bearing bush comprises the sum of the thickness of the bearing bush pad, the thickness of the backing plate and the thickness of the bearing bush shell. The bearing shell and the backing plate are made of low alloy steel, the strength, the rigidity and the wear resistance are good, deformation and abrasion cannot be generated in the normal operation and maintenance processes of the bearing, a layer of softer bus alloy is cast on the surface of the bearing block, and the surface is worn in contact with a rotating large shaft during operation, so that the wear state of the bearing block can be reflected most directly by measuring the thickness of the bearing block.
At present, when the thickness of a tile is required to be measured, as no proper measuring tool is needed, the tile is required to be disassembled and lifted from a tile shell, a bearing bush is suspended in the midair, a measuring point is positioned under the vertical direction through the adjustment of a chain block, and a person is always suspended near the half-empty bearing bush during measurement, so that safety risks exist, driving resources are occupied for a long time, and the overhaul period is influenced; in addition, during measurement, as the multi-component combination and the tile can swing in the circumferential direction, four corners of the tile need to be leveled and fixed, and the rear part of the tile can be measured, the procedure is complicated, and accumulated errors are introduced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a steam turbine tile thickness measuring device which improves the measuring precision and saves the disassembly and installation workload and the maintenance labor investment aiming at the defects of the prior art.
The technical scheme adopted for solving the technical problems is as follows: the method comprises the steps of constructing a steam turbine tile thickness measuring device, wherein the measuring device comprises a measuring component, a positioning component and a supporting component, the measuring component and the positioning component are respectively fixed at two ends of the supporting component, and the measuring component and the positioning component are mutually symmetrical along the horizontal central plane of the supporting component;
the measuring assembly comprises a measuring head, one end of the measuring head is fixed with a connecting rod, and one end of the connecting rod, which is far away from the measuring head, is connected with a special nut used as a measuring reference.
Preferably, the measuring assembly further comprises a measuring base, the measuring base being fixed to the supporting assembly by a connecting piece; the measuring head is fixed on the measuring base.
Preferably, the first end of the measuring base is provided with a first slot, and the measuring head is arranged in the first slot; the second end of the measuring base is provided with a second slot, the second end of the measuring base is connected with a shell, the first slot, the second slot and the inside of the shell are communicated to form a movable channel, a spring sleeved outside the connecting rod is arranged in the shell, and the spring is arranged in the movable channel in a penetrating mode.
Preferably, the first slotted aperture is larger than the second slotted aperture.
Preferably, the housing comprises a housing part and a connecting part, the housing part being connected to the connecting part, the housing being fastened to the measuring base by means of the connecting part.
Preferably, the diameter of the connecting part is larger than that of the second slot, a screw hole is formed in the connecting part, and the connecting part is fixed on the measuring base through cooperation of a fastening screw and the screw hole.
Preferably, the positioning assembly comprises a positioning base, the positioning base is fixed on the second end of the supporting assembly, and a reference ball for determining a measurement point position is arranged on the first surface of the positioning base.
Preferably, the reference ball is fixed on the positioning base at a position corresponding to the measuring head, and the projection of the reference ball falls on the surface of the measuring head far away from one end of the connecting rod.
Preferably, the positioning assembly further comprises a positioning nut, wherein the positioning nut is connected to the positioning base through threads and used for limiting the relative position of the measuring head in the axial direction of the bearing bush.
Preferably, the positioning nut is provided with a positioning disc close to the supporting component, and the positioning disc is fixed between the supporting component and the positioning base.
Preferably, an external thread is arranged at one end of the positioning base close to the supporting component, and the positioning nut is in threaded connection with one end of the positioning base close to the supporting component.
Preferably, the axial distance from the first side of the positioning base to the first side of the positioning nut is smaller than the axial distance from the side of the steam turbine shoe to the shell stud of the steam turbine; the first side surface of the positioning base is perpendicular to the first surface of the positioning base, and the first side surface of the positioning nut is a side surface, close to the reference ball, of the positioning nut;
the distance from the reference ball to a second surface opposite to the first surface of the positioning base is smaller than the distance from the bottom of the steam turbine tile to the tile shell stud.
Preferably, the measuring device for the thickness of the steam turbine tile further comprises a measuring tool, a first central hole is formed in the measuring head, a second central hole communicated with the first central hole is formed in the special nut, and the measuring tool is installed in the first central hole and the second central hole.
The implementation of the invention has the following beneficial effects: the steam turbine tile thickness measuring device can realize adjustable automatic alignment, eliminates human errors in the alignment process of the traditional measuring method, obviously improves measuring precision, simultaneously meets the function of measuring the thickness of the tile without removing the tile on site, and saves the workload of disassembly and installation, a large amount of investment of maintenance manpower and important driving resources for maintenance of a conventional island.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic view of a construction of a steam turbine shoe thickness measuring device of the present invention;
FIG. 2 is a schematic view of the measuring assembly of the steam turbine shoe thickness measuring device of the present invention;
FIG. 3 is a front view of a positioning assembly of the steam turbine shoe thickness measuring device of the present invention;
FIG. 4 is a top view of a positioning assembly of the steam turbine shoe thickness measuring device of the present invention;
FIG. 5 is a side view of a positioning assembly of the steam turbine shoe thickness measuring device of the present invention;
FIG. 6 is a schematic view of a bushing structure of the present invention;
fig. 7 is a cross-sectional view of the bearing shell of fig. 6 in the S-S direction.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are configured and operated in specific directions based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention, and do not indicate that the apparatus or element to be referred to must have specific directions, and thus should not be construed as limiting the present invention.
It should also be noted that unless explicitly stated or limited otherwise, terms such as "mounted," "connected," "secured," "disposed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or one or more intervening elements may also be present. The terms "first," "second," "third," and the like are used merely for convenience in describing the present invention and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby features defining "first," "second," "third," etc. may explicitly or implicitly include one or more such features. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
Referring to fig. 1 to 5, in order to provide a steam turbine tile thickness measuring device according to the present invention, as shown in fig. 1, the steam turbine tile thickness measuring device includes a measuring assembly 1, a positioning assembly 2, and a supporting assembly 3, wherein the measuring assembly 1 and the positioning assembly 2 are respectively fixed at two ends of the supporting assembly 3 through a connecting piece 4, and the measuring assembly 1 and the positioning assembly 2 are symmetrical to each other along a horizontal center plane of the supporting assembly 3; the support assembly 3 may be a measuring handle for facilitating measurement, in particular a semi-circular metal frame.
As shown in fig. 2, the measuring assembly 1 includes a measuring head 11, the measuring head 11 may be an arc measuring head, one end of the measuring head 11 is fixed with a connecting rod 12, and one end of the connecting rod 12 away from the measuring head 11 is connected with a special nut 13 used as a measuring reference. Specifically, the connecting rod 12 is cylindrical, and an external thread connected with the special nut 13 is processed at the top of the connecting rod 12; the special nut 13 is a measuring standard, so that the top surface and the bottom surface of the special nut 13 have higher flatness and parallelism, and the central hole on the special nut 13 and the bolt hole connected with the connecting rod 12 have higher perpendicularity with the top surface. The connecting rod 12 is not easy to be too high after being connected with the special nut 13, and is convenient for on-site measurement at about 100 mm.
Further, the measuring assembly 1 further comprises a measuring base 14, the measuring base 14 may be a cuboid, and the measuring base 14 is fixed on the first end of the supporting assembly 3 through the connecting piece 4; the stylus 11 is fixed to a measurement base 14.
With reference to fig. 3-4, further, the connecting piece 4 is a square key, two ends of the supporting component 3 are respectively provided with key grooves, and the two key grooves have the same size and are symmetrical to each other along the horizontal central plane of the supporting component 3; the measuring assembly 1 and the positioning assembly 2 are respectively connected with key grooves on two ends of the supporting assembly 3 in a matched mode through square keys and H7g6, and specifically, the two square keys are identical in size.
When both the measuring assembly 1 and the positioning assembly 2 are inserted into the support assembly 3, a fillet weld connection is made at the interface of the components. The supporting component 3 is made of steel pipes or steel plates with high rigidity, and handles with good heat insulation performance are assembled on the outer ring metal rods at the same time in consideration of the change of the environmental temperature of the overhaul site and the stability of measurement.
Further, as shown in fig. 2, the first end of the measuring base 14 is provided with a first slot 141, and the measuring head 11 is installed in the first slot 141; the second end of the measuring base 14 is provided with a second slot 142, the second end of the measuring base 14 is connected with a housing 15, the first slot 141, the second slot 142 and the interior of the housing 15 are communicated to form a movable channel, a spring 16 sleeved outside the connecting rod 12 is arranged in the housing 15, and the spring 16 is arranged in the movable channel in a penetrating mode. Specifically, the first slot 141 may be a square slot, the square slot is matched with the outer edge of the measuring head 11 and plays a role in limiting, the second slot 142 may be circular, the penetration of the spring 16 is required to be satisfied, the top surface of the measuring head 11 is provided with a circular slot matched with the spring 16, the size of the circular slot may be equal to that of the second slot 142, the bottom surface of the measuring head 11 is an arc surface with a certain width, and the arc radius is slightly smaller than that of the bearing alloy surface of the bearing pad 101 to be measured by 1-1.5 mm; the connecting rod 12 is at the center of the gauge head 11. The spring force can bear the weight of the supporting component 3, and the surface of the bearing alloy is not damaged, so that the human measurement error is reduced, and the measurement stability and reliability are improved.
Further, the caliber of the first slot 141 is larger than that of the second slot 142 to limit the probe 11 to move up and down in the axial direction beyond the range, so that the top surface of the probe 11 is prevented from contacting the housing 15, and therefore the probe 11 can move to the side far away from the measuring base 14, and the side close to the measuring base 14 is limited by the caliber and depth of the second slot, and the top surface of the probe 11 which is mounted in the second slot 142 but is connected with the spring 16 does not exceed the measuring base 14.
Further, the housing 15 includes a housing portion 151 and a connecting portion 152, and the housing portion 151 is connected to the connecting portion 152, and the housing 15 is fixed to the measurement base 14 by the connecting portion 152. The top of the shell 15 is provided with a through hole matched with the connecting rod 12 and plays a limiting role on the connecting rod 12, so that the matching of the two parts meets the requirement of base hole manufacturing; the top surface of the shell 15 is matched with the bottom of the special nut 13 to be a measuring reference surface, so that the top surface and the bottom surface of the shell 15 have higher flatness, and the barrel body and the bottom surface have certain perpendicularity.
The spring 16 is installed in the casing 15 through a round hole in the middle of the measuring base 14, the connecting rod 12 and the measuring head 11 can be in an integrated structure, the connecting rod 12 penetrates into the middle hole of the spring 16 and penetrates through a through hole at the top of the casing 15 to be connected with the special nut 13, and meanwhile, the measuring head 11 penetrates into the second groove 142 of the measuring base 14 to compress the spring 16.
Further, the diameter of the connecting portion 152 is larger than that of the second slot 142, a plurality of screw holes 1521 are formed in the connecting portion 152, and the connecting portion 152 is fixed on the measuring base 14 by means of fastening screws and the screw holes 1521.
As shown in fig. 3-5, the positioning assembly 2 further comprises a positioning base 21, the positioning base 21 is fixed on the second end of the supporting assembly 3, and a reference ball 22 for determining the measurement point is arranged on the first surface of the positioning base 21. The bottom surface of the measuring base 14 and the center of the positioning base 21 are on the same vertical plane passing through the center line of the measuring handle; after square keys on the measuring base 14 and the positioning base 21 are inserted into the key grooves, the bottom surface of the measuring base 14 is parallel to the top surface of the positioning base 21.
Further, a reference ball 22 is fixed to the positioning base 21 at a position corresponding to the gauge head 11, and a projection of the reference ball 22 falls on a surface of the gauge head 11 at an end remote from the connecting rod 12. The reference ball 22 is embedded in the positioning base 21, can be manufactured into a whole, and is contacted with the bottom of the tile 101 in a point-surface contact mode to determine a measurement point; the center line of the reference ball 22 perpendicular to the base is within the plane of the upper probe 11. The wear-resistant alloy steel balls are inlaid on the flat plate, and can be directly inserted into gaps between the tile 101 and the tile shell 103 during measurement, so that the problem that the thickness of the tile 101 cannot be directly measured by a traditional outside micrometer is solved; meanwhile, the axial positioning fine adjustment nut of the measuring ruler is added, the measuring position is more accurately limited in a proper range of 15-25mm of the edge of the tile 101, and the measuring efficiency is improved.
Further, the positioning assembly 2 further comprises a positioning nut 23, and the positioning nut 23 is connected to the positioning base 21 through threads, so as to limit the relative position of the measuring head 11 in the axial direction of the bearing bush. The positioning nut 23 is arranged on the positioning base 21 through threads, and the positioning nut 23 is contacted with a metal part on the side surface of the tile 101 during measurement, so that the relative position of the measuring head 11 in the axial direction of the bearing bush is mainly limited, and the position is further accurately measured.
Further, the positioning nut 23 is provided with a positioning disk 24 near the supporting component 3, and the positioning disk 24 is fixed between the supporting component 3 and the positioning base 21. Specifically, the left end of the positioning disk 24 is welded after a square key is inserted into a key groove at the bottom of the supporting component 3, and the right end of the positioning disk 24 is connected with the positioning base 21 through a bolt and then is connected through a fillet weld.
Further, an external thread is arranged at one end of the positioning base 21 close to the supporting component 3, and a positioning nut 23 is in threaded connection with one end of the positioning base 21 close to the supporting component 3.
As shown in fig. 6 and 7, which are schematic views of the bearing bush structure, further, since the axial position of the bottom of the shoe 101 is blocked by the stud 103 in the condition that the bearing bush is not detached, the following requirements are imposed on various dimensions of the device, that the axial distance from the first side of the positioning base 21 to the first side of the positioning nut 23 is smaller than the axial distance from the side of the turbine shoe 101 to the stud 103 of the turbine; that is, the axial distance b between the rightmost end of the positioning base 21 and the positioning nut 23 is smaller than the axial distance a from the side surface of the tile 101 to the stud of the tile shell 103; the first side surface of the positioning base 21 is vertical to the first surface of the positioning base 21, and the first side surface of the positioning nut 23 is the side surface, close to the reference ball 22, of the positioning nut 23;
the distance from the reference ball 22 to the second surface opposite to the first surface of the positioning base 21 is smaller than the distance from the bottom of the steam turbine tile 101 to the stud of the tile shell 103; i.e. the distance c from the reference ball 22 to the bottom surface of the positioning base 21 should be smaller than the distance d from the bottom of the tile 101 to the arc of the stud of the tile 103.
Further, the measuring device for the thickness of the steam turbine tile further comprises a measuring tool 5 which can be matched with an independent special measuring tool for measurement, the measuring head 11 is provided with a first central hole 111, the special nut 13 is provided with a second central hole 131 communicated with the first central hole 111, and the measuring tool 5 is arranged in the first central hole 111 and the second central hole 131. Specifically, the measuring tool 5 may be a dedicated depth micrometer or a customized extension dial indicator 6 inserted into the first central hole 111 of the measuring head 11 and the second central hole 131 of the special nut 13, and measure the distance from the top surface of the special nut 13 to the bottom surface of the measuring head 11 with the top surface as a reference surface.
In the conventional measuring process, the thickness of the bearing bush comprises the sum of the thickness of the bearing bush pad 101, the thickness of the backing plate 102 and the thickness of the bearing bush shell 103. When the steam turbine tile thickness measuring device is used for measuring under the condition that the bearing bush is not detached, a standard block is used for calibrating a 0-point reading of a measuring ruler before use, the positioning assembly 2 is inserted into a gap d between the tile 101 and the tile body, the base datum ball 22 is contacted with the bottom surface of the tile 101, the positioning nut 23 is contacted with the side surface of the tile 101, and the special nut 13 is lifted to contact the measuring head 11 with the bearing alloy surface of the tile 101. The plastic handle above the supporting component 3 is held by hands, the bottom measuring point is kept motionless, and the measuring head 11 is slightly slid, so that the circular arc surface of the measuring head is tightly attached to the alloy surface of the bearing of the tile 101. Subsequently, the distance from the top surface of the special nut 13 to the bearing alloy surface was measured using a special micrometer or a custom-made extension gauge bar dial gauge 5 and the data was recorded to complete the measurement.
The implementation of the invention has the following beneficial effects: according to the invention, by designing the special tool for measuring the tile thickness of the turbine shaft, which is capable of automatically aligning, the human error in the alignment process of the traditional measuring method is eliminated, the measuring precision is obviously improved, the function of measuring the tile thickness without removing the tile on site is simultaneously satisfied, the disassembly and installation workload, a large amount of overhaul manpower investment and important driving resources for routine island overhaul are saved.
It is to be understood that the above examples only represent preferred embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the invention; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (7)
1. The device for measuring the thickness of the steam turbine tile is characterized by comprising a measuring assembly (1), a positioning assembly (2) and a supporting assembly (3), wherein the measuring assembly (1) and the positioning assembly (2) are respectively fixed at two ends of the supporting assembly (3), and the measuring assembly (1) and the positioning assembly (2) are mutually symmetrical along the horizontal central plane of the supporting assembly (3);
the measuring assembly (1) comprises a measuring head (11) and a measuring base (14), wherein a connecting rod (12) is fixed at one end of the measuring head (11), and a special nut (13) serving as a measuring reference is connected to one end, far away from the measuring head (11), of the connecting rod (12); the measuring base (14) is fixed on the supporting component (3) through a connecting piece (4); the measuring head is fixed on the measuring base (14);
a first slot (141) is formed in the first end of the measuring base (14), and the measuring head (11) is installed in the first slot (141); the second end of the measuring base (14) is provided with a second slot (142), the second end of the measuring base (14) is connected with a shell (15), the first slot (141), the second slot (142) and the interior of the shell (15) are communicated to form a movable channel, a spring (16) sleeved outside the connecting rod (12) is arranged in the shell (15), and the spring (16) is arranged in the movable channel in a penetrating way;
the positioning assembly (2) comprises a positioning base (21), the positioning base (21) is fixed on the second end of the supporting assembly (3), and a reference ball (22) for determining a measurement point position is arranged on the first surface of the positioning base (21); the reference ball (22) is fixed on the positioning base (21) and corresponds to the measuring head (11), and the projection of the reference ball (22) falls on the surface of one end, far away from the connecting rod (12), of the measuring head (11);
the positioning assembly (2) further comprises a positioning nut (23), wherein the positioning nut (23) is connected to the positioning base (21) through threads and is used for limiting the relative position of the measuring head (11) in the axial direction of the bearing bush; the axial distance from the first side surface of the positioning base (21) to the first side surface of the positioning nut (23) is smaller than the axial distance from the side surface of the turbine shoe to the shell stud of the turbine; the first side surface of the positioning base (21) is perpendicular to the first surface of the positioning base (21), and the first side surface of the positioning nut (23) is a side surface, close to the reference ball (22), of the positioning nut (23);
the distance from the reference ball (22) to a second surface opposite to the first surface of the positioning base (21) is smaller than the distance from the bottom of the steam turbine shoe to the shoe stud.
2. The steam turbine shoe thickness measurement device of claim 1, wherein the first slot (141) is larger in caliber than the second slot (142).
3. The steam turbine shoe thickness measuring device according to claim 1, characterized in that the casing (15) comprises a housing part (151) and a connecting part (152), the housing part (151) being connected to the connecting part (152), the casing (15) being fixed to the measuring base (14) by the connecting part (152).
4. A steam turbine shoe thickness measuring device according to claim 3, wherein the diameter of the connecting portion (152) is larger than the diameter of the second slot (142), a screw hole (1521) is provided in the connecting portion (152), and the connecting portion (152) is fixed on the measuring base (14) by engaging a fastening screw with the screw hole (1521).
5. The steam turbine tile thickness measuring device according to claim 1, wherein a positioning disc (24) is arranged on the positioning nut (23) close to the supporting component (3), and the positioning disc (24) is fixed between the supporting component (3) and the positioning base (21).
6. The steam turbine shoe thickness measuring device according to claim 1, wherein an external thread is provided at an end of the positioning base (21) adjacent to the support assembly (3), and the positioning nut (23) is screwed with an end of the positioning base (21) adjacent to the support assembly (3).
7. The steam turbine shoe thickness measuring device according to claim 1, further comprising a measuring tool (5), wherein the measuring head (11) is provided with a first central hole (111), the special nut (13) is provided with a second central hole (131) communicated with the first central hole (111), and the measuring tool (5) is installed in the first central hole (111) and the second central hole (131).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210404031.8A CN114935297B (en) | 2022-04-18 | 2022-04-18 | Thickness measuring device for steam turbine tile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210404031.8A CN114935297B (en) | 2022-04-18 | 2022-04-18 | Thickness measuring device for steam turbine tile |
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| Publication Number | Publication Date |
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| CN114935297A CN114935297A (en) | 2022-08-23 |
| CN114935297B true CN114935297B (en) | 2023-11-10 |
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- 2022-04-18 CN CN202210404031.8A patent/CN114935297B/en active Active
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| WO2005038389A1 (en) * | 2003-10-20 | 2005-04-28 | G.V. S.R.L. | An apparatus for calibrating a measuring instrument |
| CN201034530Y (en) * | 2007-04-28 | 2008-03-12 | 东风汽车有限公司 | Deep inner hole ring groove diameter on-line measuring device |
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