CN218002414U

CN218002414U - Stator blade assembly clearance measuring device

Info

Publication number: CN218002414U
Application number: CN202221012710.2U
Authority: CN
Inventors: 何碧波; 王辉; 曾卫江
Original assignee: Hangfa Gas Turbine Zhuzhou Co ltd
Current assignee: Hangfa Gas Turbine Zhuzhou Co ltd
Priority date: 2022-04-28
Filing date: 2022-04-28
Publication date: 2022-12-09
Anticipated expiration: 2032-04-28

Abstract

The utility model discloses a quiet leaf assembly gap measuring device for install in the casket of gas turbine and measure the clearance between quiet leaf and the wheel hub, quiet leaf assembly gap measuring device includes the location axle and locates the epaxial measuring component of location, the location axle is used for wearing to establish in the casket and with preset primary shaft bearing axial fixity in the casket, measuring component includes the edge the radial outside measurement festival section that extends the formation of location axle, measure keeping away from in the festival section the terminal surface of location axle one end establish into with the corresponding arc reference surface of wheel hub's periphery wall, the location axle is used for driving the measurement festival section is rotatory and orders about around the axis of location axle the arc reference surface is at the casket internal rotation and then towards different quiet leaf. The utility model provides a quiet leaf assembly gap measuring device can conveniently measure the clearance between quiet leaf and the wheel hub, simplifies the measuring procedure, improves measurement of efficiency to make measuring result more accurate reliable.

Description

Stator blade assembly clearance measuring device

Technical Field

The utility model relates to a quiet leaf assembly gap of gas turbine measures technical field, especially, relates to a quiet leaf assembly gap measuring device.

Background

In the maintenance operation of a certain type of gas turbine, the low-pressure casing stator blade needs laser cladding lengthening due to serious blade tip abrasion, and then blade tip allowance is removed, so that the assembly clearance between the stator blade tip and a compressor rotor hub meets the requirement.

However, the stator blade assembly clearance is usually measured by using a rotor hub, due to structural interference of the hub and limitation of a measurement position, only the blade tip clearance of the stator blade on the left and right sides of the casing can be accurately measured, the blade tip clearances of the stator blades on the top end, the bottom end and other positions cannot be directly measured, only the indirect measurement can be performed by a lead wire pressing or iron cement method, the measurement method needs to frequently hoist the compressor rotor, the operation is very complicated, and the measurement result is not accurate.

SUMMERY OF THE UTILITY MODEL

The utility model provides a quiet leaf assembly gap measuring device to solve quiet leaf assembly gap and measure difficult and the unsafe technical problem of measuring result.

The utility model provides a quiet leaf fit-up gap measuring device for install in gas turbine's the machine casket and measure the clearance between quiet leaf and the wheel hub, quiet leaf fit-up gap measuring device includes the location axle and locates the epaxial measuring component of location, the location axle is used for wearing to establish in the machine casket and with the first bearing seat axial fixity of predetermineeing in the machine casket, measuring component includes the edge the radial outside measurement section that extends the formation of location axle, measure keeping away from in the section the terminal surface of location axle one end establish into with the corresponding arc reference surface of wheel hub's periphery wall, the location axle is used for driving the measurement section winds the axis of location axle is rotatory and orders about the arc reference surface is in the machine casket and then the quiet leaf of different orientation.

Preferably, the measuring component still includes the mount pad, measure the segmental orientation first spacing groove has been seted up to the one side of location axle, the mount pad orientation the second spacing groove has been seted up to the one side of location axle, measure the segmental with the mount pad can be dismantled to be connected and pass through first spacing groove and the centre gripping of second spacing groove are fixed in on the location axle.

Preferably, the length dimension of the measurement section is more than twice the thickness dimension of the mount.

Preferably, the mounting seat is in a semicircular ring shape matched with the periphery of the positioning shaft.

Furthermore, a connecting hole is formed in the mounting seat, a threaded hole is formed in the measuring section, the measuring assembly further comprises a connecting bolt, and the connecting bolt sequentially penetrates through the connecting hole, the threaded hole and is in threaded connection with the threaded hole, so that the mounting seat is screwed and fixed on the measuring section.

Preferably, the measuring component is equipped with a plurality ofly, and is a plurality of the measuring component follows the axial interval of location axle sets up and is used for the different wheel hub of adaptation respectively, quiet leaf assembly gap measuring device is still including the cover locate on the location axle and press from both sides and locate adjacent two the position sleeve between the measuring component.

Preferably, the positioning shaft comprises a main shaft for mounting the measuring assembly and a limiting shaft coaxially arranged on the end portion of the main shaft relative to the main shaft, the limiting shaft is used for penetrating into the first bearing seat, the diameter of the limiting shaft is smaller than that of the main shaft, so that a limiting step is formed on the end face of the main shaft, and the limiting step is used for abutting against the end face of the first bearing seat.

Further, the central angle of the arc-shaped reference surface is less than 90 degrees.

Furthermore, a lightening hole is formed in the measuring section.

Further, the stator blade assembly gap measuring device further comprises a driving assembly connected with the positioning shaft and used for driving the positioning shaft to rotate.

The utility model discloses following beneficial effect has:

the utility model provides a quiet leaf assembly gap measuring device passes through location axle installation measuring component, make measuring component can wind the axis of machine casket is rotatory, thereby make the measurement segment section can replace wheel hub, can drive the measurement segment section and rotate and make its arc reference surface rotate to the state towards different quiet leaves, just can utilize the arc reference surface to measure the assembly gap of the quiet leaf of different positions respectively, compare and carry out the measuring mode through circular wheel hub, the measurement segment section can not occupy the space of non-measurement position, make things convenient for manual work or machinery to carry out measuring operation, thereby can simplify the measurement step, reduce the holistic hoist and mount process of rotor in a large number, and improve measurement efficiency, and make measuring result more accurate reliable.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:

fig. 1 is a schematic structural diagram of a stationary blade assembly gap measuring apparatus according to an embodiment of the present invention;

FIG. 2 is an exploded view of the coupling structure of the positioning shaft and the first bearing housing shown in FIG. 1;

FIG. 3 is an exploded view of one embodiment of the measurement assembly shown in FIG. 1;

FIG. 4 is an exploded view of another embodiment of the measurement assembly shown in FIG. 1.

Illustration of the drawings:

1. assembling a gap measuring device on the stationary blade; 11. positioning the shaft; 111. a main shaft; 1111. a limiting step; 112. a limiting shaft; 12. a measurement component; 121. measuring the segment; 1211. an arc-shaped reference surface; 1212. a first limit groove; 1213. a threaded hole; 1214. lightening holes; 122. a mounting seat; 1221. a second limit groove; 1222. connecting holes; 123. a connecting bolt; 2. a first bearing housing; 3. a second bearing seat.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways, which are defined and covered below.

Fig. 1 to fig. 4 show jointly the utility model provides a quiet leaf assembly gap measuring device, it is used for installing in gas turbine's the machine casket and measure the clearance between quiet leaf and the wheel hub to judge whether the repair work of quiet leaf apex is qualified, its simple structure and measure the convenience, effectively reduce the measurement degree of difficulty and improve measurement efficiency, guarantee measuring result's accuracy.

As shown in fig. 1, the vane assembly gap measuring apparatus 1 includes a positioning shaft 11 and a measuring assembly 12, the positioning shaft 11 is configured to be inserted into a casing and axially fixed to a first bearing seat 2 preset in the casing, the measuring assembly 12 is sleeved on the positioning shaft 11, the measuring assembly 12 includes a measuring segment 121 formed to extend radially outward of the positioning shaft 11, an end surface of the measuring segment 121 far from one end of the positioning shaft 11 is set as an arc-shaped reference surface 1211, the arc-shaped reference surface 1211 corresponds to an outer peripheral wall of a hub, so that the arc-shaped reference surface 1211 can replace a part of the outer peripheral wall structure of the hub, and the positioning shaft 11 is configured to drive the measuring segment 121 to rotate around an axis of the positioning shaft 11, so that the arc-shaped reference surface 1211 rotates in the casing and is driven toward different vanes.

Specifically, since the arc-shaped reference surface 1211 can rotate to a state facing different stationary blades, a feeler gauge or other measuring tool can be inserted into a gap between the arc-shaped reference surface 1211 and the tip of the stationary blade to measure the assembly gap of the stationary blade, and whether the gap between the tip of the stationary blade and the hub meets the design requirement is judged, so as to determine whether the repairing work of the tip of the stationary blade is qualified.

Further, the arc length of the arc-shaped reference surface 1211 is equal to or greater than the arc length of the installation position occupied by the two stator blades in the circumferential direction of the casing, and the width of the arc-shaped reference surface 1211 in the axial direction of the positioning shaft 11 is greater than the width of the stator blades in the axial direction of the positioning shaft 11, so as to ensure that the arc-shaped reference surface 1211 can cover any position of the stator blades.

The stator blade assembly clearance measuring device 1 is characterized in that the measuring assembly 12 is mounted on the positioning shaft 11, so that the measuring assembly 12 can rotate around the axis of the casing, the measuring segment 121 can replace a hub, the measuring segment 121 can be driven to rotate, the arc-shaped reference surface 1211 of the measuring segment 121 is rotated to be in a state facing different stator blades, the arc-shaped reference surface 1211 can be used for measuring the assembly clearance of the stator blades at different positions, compared with a mode of measuring through a circular hub, the measuring segment 121 does not occupy a space at a non-measuring position, structural interference and limitation of a measuring position do not exist, manual or mechanical stretching into the casing is facilitated to carry out measuring operation, measuring steps can be simplified, the whole lifting process of a rotor is greatly reduced, the measuring efficiency is improved, and the measuring result is more accurate and reliable.

As shown in fig. 2, the positioning shaft 11 includes a main shaft 111 and a limiting shaft 112, the main shaft 111 is used for mounting the measuring assembly 12, the limiting shaft 112 is coaxially disposed at an end portion of the main shaft 111 relative to the main shaft 111, a diameter of the limiting shaft 112 is adapted to an inner diameter of the first bearing seat 2, and a diameter of the limiting shaft 112 is smaller than a diameter of the main shaft 111, so as to form a limiting step 1111 at an end surface of the main shaft 111, the limiting shaft 112 is used for being inserted into the first bearing seat 2, and the limiting step 1111 is used for abutting against the end surface of the first bearing seat 2, thereby achieving axial positioning of the positioning shaft 11 relative to the first bearing seat 2, the positioning structure is simple and efficient, and the positioning shaft 11 can be prevented from axially moving and driving the measuring assembly 12 to axially move in a using process, so as to ensure that a measuring position of the measuring assembly 12 meets requirements.

Further, one end of the main shaft 111, which is far away from the limiting shaft 112, is used for being inserted into a second bearing seat 3 preset in the casing, and the positioning shaft 11 is supported by the first bearing seat 2 and the second bearing seat 3 together.

As shown in fig. 3, the measuring assembly 12 further includes an installation base 122, a first limiting groove 1212 is formed in one surface of the measuring section 121 facing the positioning shaft 11, a second limiting groove 1221 is formed in one surface of the installation base 122 facing the positioning shaft 11, the first limiting groove 1212 and the second limiting groove 1221 are both semi-arc-shaped along the radial cross section of the positioning shaft 11, and the measuring section 121 and the installation base 122 are detachably connected and clamped and fixed on the positioning shaft 11 through the first limiting groove 1212 and the second limiting groove 1221, so that the axial limiting and the circumferential limiting of the measuring assembly 12 and the positioning shaft 11 are realized, and the positioning shaft 11 can drive the measuring section 121 to rotate.

The measuring segment 121 is installed and fixed through the installation base 122, and can be formed by enclosing the first limiting groove 1212 and the second limiting groove 1221 together to form a circular ring structure on the positioning shaft 11, so that the connection structure is simple and efficient, the connection tightness is effectively improved, and the measurement assembly 12 is prevented from being displaced relative to the positioning shaft 11.

Preferably, the length dimension of the measuring segment 121 is more than twice the thickness dimension of the mounting seat 122. It should be understood that the length dimension of the measurement segment 121 refers to a dimension of the measurement segment 121 extending outward in the radial direction of the positioning shaft 11, and the thickness dimension of the mounting seat 122 refers to a thickness of the mounting seat 122 in the radial direction of the positioning shaft 11, that is, the thickness dimension of the mounting seat 122 is less than half of the length dimension of the measurement segment 121, so that a sufficient clearance space is formed outside the mounting seat 122 while a certain thickness and strength of the mounting seat 122 are ensured, interference of the mounting seat 122 on the measurement operation is avoided, and the measurement difficulty is reduced.

Preferably, the mounting seat 122 is configured to be a semicircular ring shape adapted to the outer circumference of the positioning shaft 11, so that the mounting seat 122 is configured to be attached to the positioning shaft 11 as much as possible, thereby preventing the mounting seat 122 from extending outward along the radial direction of the positioning shaft 11 too much to affect the measurement convenience, reducing the manufacturing materials, and reducing the cost.

Furthermore, the mounting seat 122 is provided with a connecting hole 1222, the measuring segment 121 is provided with a threaded hole 1213, the measuring assembly 12 further includes a connecting bolt 123, and the connecting bolt 123 sequentially penetrates through the connecting hole 1222 and the threaded hole 1213 and is in threaded connection with the threaded hole 1213, so as to fasten and fix the mounting seat 122 to the measuring segment 121. The measuring segment 121 and the mounting base 122 are fixedly connected through the connecting bolt 123, the connecting structure is simple, the mounting and dismounting are convenient, the specific mounting position of the measuring segment 121 can be conveniently adjusted, and the measuring segment 121 can be better adapted to the stationary blade.

Specifically, during assembly, the measuring segment 121 and the mounting seat 122 may be connected into a whole and sleeved on the positioning shaft 11 through the connecting bolt 123, and the measuring segment 121 is in a movable state, so that the measuring segment 121 is conveniently slid to a preset position along the axis of the positioning shaft 11, and finally the connecting bolt 123 is tightened, so that the measuring segment 121 can be locked and fixed on the positioning shaft 11.

Further, a lightening hole 1214 is formed in the measuring segment 121 to lighten the weight of the measuring segment 121, so as to conveniently drive the measuring segment 121 to rotate to any direction.

Further, the cross section of the measuring segment 121 along the radial direction of the positioning shaft 11 is a long strip, so that the occupied space is reduced, and meanwhile, the structural strength and stability of the measuring segment 121 are ensured, thereby ensuring the accuracy of the arc-shaped reference surface 1211.

In another embodiment, as shown in fig. 4, a cross section of the measurement segment 121 along the radial direction of the positioning shaft 11 may be further provided with a fan shape to increase an arc length of the arc-shaped reference surface 1211, so that the measurement segment can measure an assembly gap of more vanes at one time, and the measurement efficiency is improved.

Further, the central angle of the arc-shaped reference surface 1211 is smaller than 90 degrees, so that the influence of an overlarge occupied space of the arc-shaped reference surface 1211 on the measurement convenience is avoided.

As shown in fig. 1, the measuring assemblies 12 are provided with a plurality of measuring assemblies 12, the plurality of measuring assemblies 12 are arranged along the axial direction of the positioning shaft 11 at intervals and are respectively used for adapting to different hubs, the stationary blade assembly gap measuring apparatus 1 further includes a positioning sleeve 13, the positioning sleeve 13 is sleeved on the positioning shaft 11 and is clamped between two adjacent measuring assemblies 12, so that the positioning sleeve 13 defines a gap between two adjacent measuring assemblies 12, only one of the mounting positions of the measuring assemblies 12 needs to be positioned, and the mounting positions of other measuring apparatuses 12 can be limited one by the positioning sleeve 13, thereby being more convenient and faster to use.

Further, the stationary blade assembly gap measuring apparatus 1 further includes a driving assembly (not shown, the same applies below), and the driving assembly is connected to the positioning shaft 11 and is configured to drive the positioning shaft 11 to rotate, so that the positioning shaft 11 drives the measuring assembly 12 to rotate, and the arc-shaped reference surface 1211 is driven to rotate to different directions for measurement.

Further, drive assembly includes driving motor or actuating handle, according to suitable drive assembly is selected to quiet leaf assembly clearance measuring device 1's whole size and weight, works as when quiet leaf assembly clearance measuring device 1's whole weight is great, adopts the driving motor drive location axle 13 is rotatory, can guarantee to rotate to target in place, works as when quiet leaf assembly clearance measuring device 1's whole weight is less, adopts actuating handle manual drive location axle 13 is rotatory, can simplify the drive structure.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a quiet leaf assembly clearance measuring device for install in the quick-witted casket of gas turbine and measure the clearance between quiet leaf and the wheel hub, characterized in that, quiet leaf assembly clearance measuring device includes location axle (11) and locates measuring component (12) on location axle (11), location axle (11) are used for wearing to establish in the quick-witted casket and with the first bearing frame (2) axial fixity that predetermines in the quick-witted casket, measuring component (12) include along the radial measuring section (121) of outwards extending formation of location axle (11), the terminal surface of keeping away from on measuring section (121) one end of location axle (11) is established to the arc reference surface (1211) corresponding with the periphery wall of wheel hub, location axle (11) are used for driving measuring section (121) around the axis rotation of location axle (11) and drive arc reference surface (1211) in the quick-witted casket internal rotation and then towards different quiet leaves.

2. The vane assembly gap measuring device according to claim 1, wherein the measuring assembly (12) further comprises a mounting seat (122), a first limiting groove (1212) is formed in one surface of the measuring section (121) facing the positioning shaft (11), a second limiting groove (1221) is formed in one surface of the mounting seat (122) facing the positioning shaft (11), and the measuring section (121) is detachably connected with the mounting seat (122) and is clamped and fixed on the positioning shaft (11) through the first limiting groove (1212) and the second limiting groove (1221).

3. The vane fit gap measuring device according to claim 2, wherein a length dimension of the measuring segment (121) is two times or more a thickness dimension of the mount (122).

4. The vane mounting gap measuring device according to claim 3, characterized in that the mount (122) is provided in a semicircular ring shape that fits to an outer periphery of the positioning shaft (11).

5. The vane assembly gap measuring device according to claim 2, wherein the mounting seat (122) has a connecting hole (1222), the measuring segment (121) has a threaded hole (1213), and the measuring assembly (12) further includes a connecting bolt (123), the connecting bolt (123) is sequentially inserted into the connecting hole (1222) and the threaded hole (1213) and is threadedly connected to the threaded hole (1213), so as to fasten the mounting seat (122) to the measuring segment (121).

6. The stator blade assembly gap measuring device according to claim 1, wherein a plurality of measuring assemblies (12) are provided, the plurality of measuring assemblies (12) are arranged at intervals in the axial direction of the positioning shaft (11) and are respectively adapted to different hubs, and the stator blade assembly gap measuring device further comprises a positioning sleeve (13) which is sleeved on the positioning shaft (11) and is clamped between two adjacent measuring assemblies (12).

7. The vane assembly gap measuring device according to claim 1, wherein the positioning shaft (11) includes a main shaft (111) for mounting the measuring assembly (12) and a limit shaft (112) coaxially provided at an end of the main shaft (111) with respect to the main shaft (111), the limit shaft (112) is configured to be inserted into the first bearing seat (2), a diameter of the limit shaft (112) is smaller than a diameter of the main shaft (111) to form a limit step (1111) at an end surface of the main shaft (111), and the limit step (1111) is configured to abut against the end surface of the first bearing seat (2).

8. The vane assembly gap measuring device according to claim 1, wherein a central angle of the arc-shaped reference surface (1211) is less than 90 degrees.

9. The vane assembly gap measuring device according to claim 1, wherein the measuring segment (121) is provided with a lightening hole (1214).

10. The vane mounting gap measuring device according to claim 1, further comprising a driving assembly connected to the positioning shaft (11) and configured to drive the positioning shaft (11) to rotate.