阅读说明：本技术 一种动力涡轮工作叶片通道精度尺寸测具及检测方法 (Power turbine working blade channel precision dimension measuring tool and detection method ) 是由 黄英 尹高平 于 2020-11-17 设计创作，主要内容包括：本发明公开了一种动力涡轮工作叶片通道精度尺寸测具及检测方法,其中动力涡轮工作叶片通道精度尺寸测具,包括工件压紧支撑座,在工件压紧支撑座的侧部设置有通道面检测机构,在通道面检测机构处设置有用于控制所述通道面检测机构动作的控制机构；待检测工作叶片被压紧支撑在工件压紧支撑座上,通过控制机构控制通道面检测机构动作,从而利用通道面检测机构对待检测工作叶片进行通道面精度尺寸的检测。本发明能快速对动力涡轮工作叶片通道的精度尺寸进行自动检测,降低工人的劳动强度,提高检测效率,保证检测结果的精准性。(The invention discloses a power turbine working blade channel precision dimension measuring tool and a detection method, wherein the power turbine working blade channel precision dimension measuring tool comprises a workpiece pressing support seat, a channel surface detection mechanism is arranged on the side part of the workpiece pressing support seat, and a control mechanism for controlling the action of the channel surface detection mechanism is arranged at the channel surface detection mechanism; the to-be-detected working blade is pressed and supported on the workpiece pressing supporting seat, and the channel surface detection mechanism is controlled to act through the control mechanism, so that the channel surface detection mechanism is used for detecting the precision and the size of the channel surface of the to-be-detected working blade. The invention can quickly and automatically detect the precision and the size of the working blade channel of the power turbine, reduce the labor intensity of workers, improve the detection efficiency and ensure the accuracy of the detection result.)

1. The utility model provides a power turbine working blade passageway precision size measuring tool which characterized in that: the device comprises a workpiece pressing support seat, wherein a channel surface detection mechanism is arranged on the side part of the workpiece pressing support seat, and a control mechanism for controlling the channel surface detection mechanism to act is arranged at the channel surface detection mechanism; the to-be-detected working blade is pressed and supported on the workpiece pressing supporting seat, and the channel surface detection mechanism is controlled to act through the control mechanism, so that the channel surface detection mechanism is used for detecting the precision and the size of the channel surface of the to-be-detected working blade.

2. The power turbine working blade passage accuracy sizing tool of claim 1, wherein: the channel surface detection mechanism comprises an upright post, an L-shaped detection block and an inductance measuring instrument, wherein the upright post is rotationally connected with the L-shaped detection block, a contact is arranged on one side edge of the L-shaped detection block and is in contact with the channel surface of the working blade to be detected, a probe of the inductance measuring instrument is arranged on a probe supporting seat, the probe is positioned at the other side edge of the L-shaped detection block, and a spring is also arranged between the other side edge of the L-shaped detection block and the probe supporting seat; during detection, the contact arranged on one side edge of the L-shaped detection block is ensured to be always in contact with the channel surface of the working blade to be detected through the acting force of the spring.

3. The power turbine working blade passage accuracy sizing tool of claim 2, characterized by: the control mechanism adopts a push rod mechanism which is arranged at the position of the other side edge of the L-shaped detection block; the ejector rod of the ejector rod mechanism is controlled to extend out to contact with the other side edge of the L-shaped detection block, so that the L-shaped detection block is pushed to rotate; the ejection rod of the ejection rod mechanism is controlled to retract, and at the moment, under the action of restoring force of the spring, the L-shaped detection block rotates reversely.

4. The power turbine working blade passage accuracy sizing tool of claim 2, characterized by: the number and the positions of the contacts are correspondingly set according to the number and the positions of the detection points on the channel surface in the design requirement, and one contact is correspondingly set in one L-shaped detection block.

5. The power turbine working blade passage accuracy sizing tool of claim 4, wherein: when the L-shaped detection blocks on the stand are arranged in a plurality of numbers, one end of the stand is arranged to be in a boss shape, the L-shaped detection blocks are in clearance fit and are rotatably connected to one end of the boss shape of the stand, the spacing sleeves are arranged among the L-shaped detection blocks, the boss-shaped end face of the stand is provided with a threaded hole, and the threaded hole is screwed in the threaded hole in the boss-shaped end face of the stand by screws, so that the L-shaped detection blocks are limited at one end of the boss shape of the stand along the axial direction of the stand.

6. The power turbine working blade passage accuracy sizing tool of claim 3, wherein: the ejector rod mechanism comprises an ejector rod supporting seat and an air cylinder arranged on the ejector rod supporting seat, the ejector rod is a piston rod of the air cylinder, and the piston rod of the air cylinder extends out to push the L-shaped detection block to rotate.

7. The power turbine working blade passage accuracy sizing tool of claims 1 to 6, characterized by: the workpiece pressing support seat comprises a quick clamp and a blade support seat, the blade support seat comprises a seat body, a V-shaped support port arranged on the seat body and a support block rotatably connected to the seat body, the bottom of the middle blade body of the working blade is supported in the V-shaped support port, and the support block supports the top side part of the middle blade body, so that the working blade is supported and placed on the blade support seat.

8. A detection method for a power turbine working blade channel precision dimension measuring tool is characterized by comprising the following steps: the power turbine working blade channel precision dimension measuring tool comprises a workpiece pressing support seat, a channel surface detection mechanism is arranged on the side part of the workpiece pressing support seat, and a control mechanism for controlling the channel surface detection mechanism to act is arranged at the channel surface detection mechanism;

the detection method is that the working blade to be detected is supported on the workpiece pressing support seat in a pressing way, and the control mechanism controls the channel surface detection mechanism to act, so that the channel surface detection mechanism is utilized to detect the precision and the size of the channel surface of the working blade to be detected; after the detection of the previous working blade to be detected is finished, the control mechanism is used for controlling the channel surface detection mechanism to act again, so that the detection is stopped; and then loosening the compression state of the previous working blade to be detected to take the previous working blade to be detected down from the workpiece compression supporting seat, and then carrying out the detection work of the next working blade to be detected, and repeating the steps until the whole detection work is completed.

9. The detection method according to claim 8, characterized in that: the channel surface detection mechanism comprises an upright post, an L-shaped detection block and an inductance measuring instrument, wherein the upright post is rotationally connected with the L-shaped detection block, a contact is arranged on one side edge of the L-shaped detection block and is in contact with the channel surface of the working blade to be detected, a probe of the inductance measuring instrument is arranged on a probe supporting seat, the probe is positioned at the other side edge of the L-shaped detection block, and a spring is also arranged between the other side edge of the L-shaped detection block and the probe supporting seat;

the detection method comprises the following specific steps:

before detection, a zero calibration step needs to be carried out: firstly, a standard working blade is pressed and fixed on a workpiece pressing support seat, a contact on one side edge of an L-shaped detection block is contacted with a channel surface of the standard working blade under the action of a spring, at the moment, the distance between a probe and the other side edge of the L-shaped detection block is measured by using the probe, and the distance is set as a standard distance; then, the standard working blade is taken down, one working blade to be detected is pressed and fixed on a workpiece pressing support seat, a contact on one side edge of the L-shaped detection block is contacted with a channel surface of the working blade to be detected under the action of a spring, at the moment, the distance between the probe and the other side edge of the L-shaped detection block is measured by using the probe, the distance is a detection distance, then, the deviation value between the detection distance and the standard distance is compared, whether the deviation value is within the design requirement is judged, if so, the judgment is qualified, otherwise, the judgment is unqualified; and after the detection is finished, taking down the previous working blade to be detected, and then carrying out the detection work of the next working blade to be detected, and circulating the steps until the whole detection work is finished.

10. The detection method according to claim 9, characterized in that: the control mechanism adopts a push rod mechanism which is arranged at the position of the other side edge of the L-shaped detection block; when the working blade needs to be replaced, firstly, the ejector rod of the ejector rod mechanism is controlled to extend out to contact with the other side edge of the L-shaped detection block, so that the L-shaped detection block is pushed to rotate, in the rotating process of the L-shaped detection block, a contact on one side edge of the L-shaped detection block is separated from a channel surface of the working blade, and at the moment, the spring is in a stretched state; then the pressing state of the working blade is released, and the working blade is taken down from the workpiece pressing support seat; and then the next working blade is placed on the workpiece pressing support seat, the pressing of the next working blade is supported on the workpiece pressing support seat, the ejector rod of the ejector rod mechanism is controlled to retract, at the moment, under the action of the restoring force of the spring, the L-shaped detection block rotates reversely, so that the contact on one side edge of the L-shaped detection block is contacted with the channel surface of the next working blade, and the replacement of the working blade is completed.

Technical Field

The invention relates to a detection tool and a detection method, in particular to a tool and a method for measuring the precision and the size of a working blade channel of a power turbine.

Background

The turbine is a fan in the engine of automobile or airplane, and is a rotary power machine for converting the energy of flowing working medium into mechanical work. It is one of the main components of aircraft engines, gas turbines and steam turbines. Turbine blades are important components of the turbine section of a gas turbine engine. The blades rotating at high speed are responsible for drawing high-temperature and high-pressure airflow into the combustor to maintain the operation of the engine. In order to ensure stable and long-term operation in extreme environments of high temperature and high pressure, turbine blades are often forged from high temperature alloys and are cooled in different ways, such as internal air flow cooling, boundary layer cooling, or thermal barrier coatings protecting the blades, to ensure operational reliability.

The working blade of the turbine generally comprises three parts, namely a blade body, a middle blade root and a tenon, as shown in fig. 1, two side surfaces at the positions of two side ends of the middle blade body 1 are blade channel surfaces 2, and in the product design, the machining precision of the blade channel surfaces 2 is specifically required. Therefore, in the production process of products, the machining precision of the blade channel surface of the working blade needs to be detected, and the thickness degree deviation of each point position on the channel surface is ensured within a certain range, so that the contour dimension of the whole turbine is ensured, and the product quality is further ensured. At present, the blade channel surface of the working blade is generally detected in an artificial mode, but the detection is performed in an artificial mode, so that the labor intensity is high, the detection efficiency is low, and the detection result is inaccurate.

Through searching, the same or similar reference documents as the present application are not found temporarily.

In conclusion, how to design a precision size measuring tool and a detection method for a power turbine working blade channel to quickly and automatically detect the precision size of the power turbine working blade channel is a technical problem which needs to be solved urgently, so that the labor intensity of workers is reduced, the detection efficiency is improved, and the accuracy of a detection result is ensured.

Disclosure of Invention

The invention aims to solve the technical problem of providing a precision size measuring tool and a detection method for a power turbine working blade channel aiming at the defects in the prior art, so that the precision size of the power turbine working blade channel can be rapidly and automatically detected, the labor intensity of workers is reduced, the detection efficiency is improved, and the precision of a detection result is ensured.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a power turbine working blade channel precision dimension measuring tool comprises a workpiece pressing support seat, a channel surface detection mechanism is arranged on the side portion of the workpiece pressing support seat, and a control mechanism used for controlling the channel surface detection mechanism to act is arranged at the channel surface detection mechanism; the to-be-detected working blade is pressed and supported on the workpiece pressing supporting seat, and the channel surface detection mechanism is controlled to act through the control mechanism, so that the channel surface detection mechanism is used for detecting the precision and the size of the channel surface of the to-be-detected working blade.

Preferably, the channel surface detection mechanism comprises an upright column, an L-shaped detection block and an inductance measuring instrument, the upright column is rotatably connected with the L-shaped detection block, a contact is arranged on one side edge of the L-shaped detection block and is in contact with the channel surface of the working blade to be detected, a probe of the inductance measuring instrument is mounted on a probe support seat, the probe is positioned at the other side edge of the L-shaped detection block, and a spring is further arranged between the other side edge of the L-shaped detection block and the probe support seat; during detection, the contact arranged on one side edge of the L-shaped detection block is ensured to be always in contact with the channel surface of the working blade to be detected through the acting force of the spring.

Preferably, the control mechanism adopts a push rod mechanism, and the push rod mechanism is arranged at the position of the other side edge of the L-shaped detection block; the ejector rod of the ejector rod mechanism is controlled to extend out to contact with the other side edge of the L-shaped detection block, so that the L-shaped detection block is pushed to rotate; the ejection rod of the ejection rod mechanism is controlled to retract, and at the moment, under the action of restoring force of the spring, the L-shaped detection block rotates reversely.

Preferably, the number and the positions of the contacts are correspondingly set according to the number and the positions of the detection points on the channel surface in the design requirement, and one contact is correspondingly set in one L-shaped detection block.

Preferably, when the L-shaped detection blocks are provided in plurality on the column, one end of the column is provided in a boss shape, the L-shaped detection blocks are in clearance fit and are rotatably connected to the boss-shaped end of the column, the spacer sleeves are provided between the L-shaped detection blocks, a threaded hole is formed in the boss-shaped end face of the column, and the L-shaped detection blocks are screwed into the threaded hole in the boss-shaped end face of the column by screws, so that the L-shaped detection blocks are axially limited to the boss-shaped end of the column.

Preferably, the ejector rod mechanism comprises an ejector rod supporting seat and an air cylinder arranged on the ejector rod supporting seat, the ejector rod is a piston rod of the air cylinder, and the piston rod of the air cylinder extends out to push the L-shaped detection block to rotate.

Preferably, the workpiece pressing support seat comprises a quick clamp and a blade support seat, the blade support seat comprises a seat body, a V-shaped support port arranged on the seat body and a support block rotatably connected to the seat body, the bottom of the middle blade body of the working blade is supported in the V-shaped support port, and the support block supports the top side part of the middle blade body, so that the working blade is supported and placed on the blade support seat.

The invention also discloses a detection method of the power turbine working blade channel precision dimension measuring tool, the detection method is to tightly press and support the working blade to be detected on the workpiece pressing and supporting seat, and the control mechanism controls the channel surface detection mechanism to act, so that the channel surface detection mechanism is utilized to detect the channel surface precision dimension of the working blade to be detected; after the detection of the previous working blade to be detected is finished, the control mechanism is used for controlling the channel surface detection mechanism to act again, so that the detection is stopped; and then loosening the compression state of the previous working blade to be detected to take the previous working blade to be detected down from the workpiece compression supporting seat, and then carrying out the detection work of the next working blade to be detected, and repeating the steps until the whole detection work is completed.

Preferably, the detection method comprises the following specific steps:

before detection, a zero calibration step needs to be carried out: firstly, a standard working blade is pressed and fixed on a workpiece pressing support seat, a contact on one side edge of an L-shaped detection block is contacted with a channel surface of the standard working blade under the action of a spring, at the moment, the distance between a probe and the other side edge of the L-shaped detection block is measured by using the probe, and the distance is set as a standard distance; then, the standard working blade is taken down, one working blade to be detected is pressed and fixed on a workpiece pressing support seat, a contact on one side edge of the L-shaped detection block is contacted with a channel surface of the working blade to be detected under the action of a spring, at the moment, the distance between the probe and the other side edge of the L-shaped detection block is measured by using the probe, the distance is a detection distance, then, the deviation value between the detection distance and the standard distance is compared, whether the deviation value is within the design requirement is judged, if so, the judgment is qualified, otherwise, the judgment is unqualified; and after the detection is finished, taking down the previous working blade to be detected, and then carrying out the detection work of the next working blade to be detected, and circulating the steps until the whole detection work is finished.

Preferably, when the working blade needs to be replaced, the ejector rod of the ejector rod mechanism is firstly controlled to extend out to contact with the other side edge of the L-shaped detection block, so that the L-shaped detection block is pushed to rotate, in the rotating process of the L-shaped detection block, a contact on one side edge of the L-shaped detection block is separated from a channel surface of the working blade, and at the moment, the spring is in a stretched state; then the pressing state of the working blade is released, and the working blade is taken down from the workpiece pressing support seat; and then the next working blade is placed on the workpiece pressing support seat, the pressing of the next working blade is supported on the workpiece pressing support seat, the ejector rod of the ejector rod mechanism is controlled to retract, at the moment, under the action of the restoring force of the spring, the L-shaped detection block rotates reversely, so that the contact on one side edge of the L-shaped detection block is contacted with the channel surface of the next working blade, and the replacement of the working blade is completed.

The invention has the beneficial effects that: according to the invention, through the structural design, the automatic detection of the precision size of the power turbine working blade channel is realized, the labor intensity of workers is reduced, the detection efficiency is improved, and the precision of the detection result is ensured. The contour flatness value at the position of the detection point on the channel surface is converted into a distance value between the probe and the other side of the L-shaped detection block, and the probe is used for directly measuring the value, so that the function of automatically detecting the contour size of the channel surface is realized. Through setting up ejector pin mechanism, can be convenient for more working vane's change, especially be used for when examining in batches, improvement detection speed and detection efficiency that can be very big. The number and the positions of the contacts are designed according to the design requirements, so that the detection result can meet the design requirements more, and the detection result is more accurate. Through improving bearing structure for working vane can be more steady supported, further improve measuring accuracy.

Drawings

FIG. 1 is a perspective view of a rotor blade;

FIG. 2 is a schematic top view of a measuring tool according to an embodiment of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a schematic perspective view of a channel plane detection mechanism and a control mechanism according to an embodiment of the present invention;

FIG. 5 is a schematic axial sectional view of the connection between the pillar and the L-shaped detecting block according to the embodiment of the present invention;

FIG. 6 is a schematic perspective view of a workpiece pressing support seat according to an embodiment of the present invention;

FIG. 7 is a schematic perspective view of a blade support base according to an embodiment of the present invention;

FIG. 8 is a schematic longitudinal sectional view of an embodiment of a blade support base supporting a working blade in accordance with the present invention;

in the figure: 1. the device comprises a middle blade body, 2 parts of a channel surface, 3 parts of a workpiece pressing support seat, 4 parts of a channel surface detection mechanism, 411 parts of an upright post, 412 parts of an L-shaped detection block, 5 parts of a control mechanism, 511 parts of an ejector rod support seat, 512 parts of an air cylinder, 6 parts of a bottom plate, 7 parts of a working blade, 8 parts of a contact, 9 parts of a probe, 10 parts of a probe support seat, 11 parts of a spring, 12 parts of a spacer bush, 13 parts of a screw, 14 parts of a guide rod and 15 parts of a push plate. 16. Quick clamp, 17, blade supporting seat, 171, seat, 172, V-shaped supporting opening, 173, supporting block, 18, supporting protrusion, 19 round bar.

Detailed Description

The technical solution of the present invention is further explained in detail with reference to the accompanying drawings and specific embodiments.

Example (b): a power turbine working blade channel precision dimension measuring tool comprises a workpiece pressing support seat 3, a channel surface detection mechanism 4 is arranged on the side portion of the workpiece pressing support seat 3, and a control mechanism 5 used for controlling the channel surface detection mechanism 4 to act is arranged at the channel surface detection mechanism 4; the workpiece pressing support seat 3, the channel surface detection mechanism 4 and the control mechanism 5 are all arranged on the bottom plate 6, the working blade 7 to be detected is pressed and supported on the workpiece pressing support seat 3, and the channel surface detection mechanism 4 is controlled to act through the control mechanism 5, so that the channel surface detection mechanism 4 is utilized to detect the precision and the size of the channel surface of the working blade 7 to be detected. After the detection of the previous working blade 7 to be detected is finished, the control mechanism 5 is used for controlling the channel surface detection mechanism 4 to act again, so that the detection is stopped; and then loosening the compression state of the previous working blade 7 to be detected, taking the previous working blade 7 from the workpiece compression support seat 3, and then carrying out the detection work of the next working blade 7 to be detected, and repeating the steps until the whole detection work is completed. According to the embodiment, through the structural design, the automatic detection of the precision size of the power turbine working blade channel is realized, the labor intensity of workers is reduced, the detection efficiency is improved, and the accuracy of the detection result is ensured.

As shown in fig. 3, the channel surface detecting mechanism 4 includes an upright column 411, an L-shaped detecting block 412 and an inductance measuring instrument, the L-shaped detecting block 412 is horizontally disposed, the upright column 411 passes through a corner of the L-shaped detecting block 412, the upright column 411 and the L-shaped detecting block 412 are rotatably connected, a contact 8 is disposed on one side of the L-shaped detecting block 412, the contact 8 is in contact with the channel surface of the working blade 7 to be detected, a probe 9 of the inductance measuring instrument is mounted on a probe supporting seat 10, and the probe is located at the other side of the L-shaped detecting block 412 and is used for measuring a distance between the probe and the other side of the L-shaped detecting block 412. A spring 11 is further arranged between the other side edge of the L-shaped detection block 412 and the probe supporting seat 8, and during detection, the contact 8 arranged on one side edge of the L-shaped detection block 412 is ensured to be always in contact with the channel surface of the working blade 7 to be detected through the acting force of the spring 11. In the present embodiment, the spring 11 may be a tension spring.

In this embodiment, before the detection, a zero calibration step needs to be performed: firstly, a standard working blade is pressed and fixed on a workpiece pressing and supporting seat 3, a contact 8 on one side edge of an L-shaped detection block 412 is contacted with a channel surface of the standard working blade under the action of a spring 11, at the moment, the distance between a probe 9 and the other side edge of the L-shaped detection block 412 is measured by using the probe 9, and the distance is set as a standard distance, namely a zero value; and then taking down the standard working blade, pressing and fixing a working blade 7 to be detected on the workpiece pressing and supporting seat 3, enabling the contact 8 on one side edge of the L-shaped detection block 412 to be in contact with the channel surface of the working blade 7 to be detected under the action of the spring 11, at the moment, measuring the distance between the probe 9 and the other side edge of the L-shaped detection block 412 by using the probe 9, wherein the distance is the detection distance, comparing the deviation value between the detection distance and the standard distance, and judging whether the deviation value is within the design requirement, if so, judging that the deviation value is qualified, otherwise, judging that the deviation value is not qualified. Through the design, the contour flatness value of the position of the detection point on the channel surface is converted into the distance value between the probe and the other side of the L-shaped detection block, and the numerical value is directly measured by the probe, so that the function of automatically detecting the contour size of the channel surface is realized.

In the present embodiment, the control mechanism 5 employs a jack mechanism, and the jack mechanism is provided at a position on the other side of the L-shaped detection block 412. When the working blade needs to be replaced, for example, a standard working blade is firmly pressed and replaced by a working blade to be detected or a previous working blade to be detected is replaced by a next working blade to be detected, in order to facilitate replacement, a mandril of the mandril mechanism is firstly controlled to extend out to contact with the other side edge of the L-shaped detection block 412, so that the L-shaped detection block 412 is pushed to rotate, in the rotating process of the L-shaped detection block 412, a contact 8 on one side edge of the L-shaped detection block 412 is separated from a channel surface of the working blade, and at the moment, the spring 11 is in a stretched state; then the pressing state of the working blade is released, and the working blade is taken down from the workpiece pressing support seat 3; and then, placing the next working blade on the workpiece pressing support seat 3, pressing and supporting the next working blade on the workpiece pressing support seat 3, and then controlling the ejector rod of the ejector rod mechanism to retract, wherein after the ejector rod retracts, a gap is reserved between the ejector rod and the other side edge of the L-shaped detection block 412, at the moment, under the action of the restoring force of the spring 11, the L-shaped detection block 412 rotates reversely, so that the contact 8 on one side edge of the L-shaped detection block 412 is contacted with the channel surface of the next working blade, and the replacement of the working blade is completed. Through setting up ejector pin mechanism, can be convenient for more working vane's change, especially be used for when examining in batches, improvement detection speed and detection efficiency that can be very big.

It should be noted here that the number and the positions of the contacts 8 are set correspondingly according to the number and the positions of the detection points on the channel surface in the design requirement, one contact 8 is set correspondingly to one L-shaped detection block, and one probe 9 is set correspondingly to each L-shaped detection block. As shown in fig. 1 and 4, in the present embodiment, four channel surface detection mechanisms 4 are provided in total. Two L-shaped detection blocks are arranged on the upright column 411 of each channel surface detection mechanism 4, and here, only one L-shaped detection block or more than two L-shaped detection blocks can be arranged on the upright column 411, and all the detection blocks are arranged according to design requirements. Therefore, the detection result can meet the design requirement, and the detection result is more accurate.

The ejector rod mechanism comprises an ejector rod supporting seat 511 and an air cylinder 512 arranged on the ejector rod supporting seat 511, the ejector rod is a piston rod of the air cylinder 512, and the L-shaped detection block 412 is pushed to rotate by the extension of the piston rod of the air cylinder 512.

When the L-shaped detection blocks on the upright column are provided with two or more than two, the following structures are adopted to be connected with the upright column in a rotating way: as shown in fig. 5, one end of the column 411 is formed into a boss shape, the plurality of L-shaped detection blocks 412 are rotatably connected to the boss-shaped end of the column 411 in a clearance fit manner, spacers 12 are arranged between the plurality of L-shaped detection blocks 412, the positions of the adjacent L-shaped detection blocks can be ensured by designing the length of the spacers 12, a threaded hole is formed in the boss-shaped end surface of the column 411, and the plurality of L-shaped detection blocks 412 are screwed into the threaded hole in the boss-shaped end surface of the column 411 by screws 13, so that the plurality of L-shaped detection blocks 412 are limited on the boss-shaped end of the column 411 in the axial direction of the column. Adopt above-mentioned structure, can be convenient for detect the dismouting operation between piece, spacer sleeve and the stand with a plurality of L types to can change the quantity and the position of contact at any time according to the design requirement.

When the L-shaped detection blocks on the upright post are provided with two or more than two, the following structure is adopted: as shown in fig. 4, a plurality of guide rods 14, in this embodiment two guide rods 14, are further provided on the ejector rod support base 511 of the ejector rod mechanism, the plurality of guide rods 14 can move back and forth along the ejector rod support base 511, a push plate 15 is provided between one end of the plurality of guide rods 14 and the piston rod of the air cylinder 512, and the push plate 15 simultaneously contacts with the other side of the L-shaped detection block 412 to push the L-shaped detection block 412 to rotate. The design ensures that the plurality of L-shaped detection blocks on the same upright post can rotate simultaneously.

When the compressing support of the working blade is pressed on the supporting seat 3 by the workpiece or is taken down from the supporting seat 3 by the workpiece, the following structure is adopted to realize: as shown in fig. 6, the workpiece pressing support base 3 includes a quick clamp 16 and a blade support base 17, and when the blade is placed on the blade support base 17, the blade is pressed against the blade support base 17 by the quick clamp 16. When the quick clamp 16 is taken off, the quick clamp 16 is just loosened.

As shown in fig. 7 and 8, the blade support base 17 includes a base body 171, a V-shaped support opening 172 provided in the base body 171, and a support block 173 rotatably connected to the base body 171, the bottom of the middle blade body 1 of the working blade is supported in the V-shaped support opening 172, and the support block 173 supports the top side of the middle blade body, so that the working blade is supported and placed on the blade support base 17. In this embodiment, the supporting block 173 is connected on the base 171 in a rotating manner, this is because the middle blade body 1 is not a straight line state, but a curve profile, in order to guarantee that the supporting block can more steadily play a supporting role to the heterotypic middle blade body, this embodiment designs the supporting block into a rotatable state, after the bottom of the middle blade body is supported at the V-shaped supporting opening, when the top side of the middle blade body is contacted with the supporting block, the supporting block can rotate a certain angle back and forth, thereby enabling the heterotypic middle blade body to be more steadily placed on the supporting block. Here, in this embodiment, two supporting protrusions 18 are further provided on the supporting block 173, and the two supporting protrusions 18 are respectively located near both ends of the supporting block 173, and contact with the top side of the intermediate blade body by using the two supporting protrusions 18, so as to support the intermediate blade body. In order to further adapt the profiled central blade airfoil, the two supporting projections 18 can also be designed to have different projection heights.

The V-shaped supporting opening 172 is also provided with a V-shaped round rod 19, and the V-shaped round rod 19 is contacted with the bottom of the middle blade body 1 to support the middle blade body, so that the round rod and the bottom of the middle blade body are in a linear contact state, and the measuring accuracy is further improved.

In conclusion, the invention realizes the automatic detection of the precision size of the working blade channel of the power turbine through the structural design, reduces the labor intensity of workers, improves the detection efficiency and ensures the precision of the detection result. The contour flatness value at the position of the detection point on the channel surface is converted into a distance value between the probe and the other side of the L-shaped detection block, and the probe is used for directly measuring the value, so that the function of automatically detecting the contour size of the channel surface is realized. Through setting up ejector pin mechanism, can be convenient for more working vane's change, especially be used for when examining in batches, improvement detection speed and detection efficiency that can be very big. The number and the positions of the contacts are designed according to the design requirements, so that the detection result can meet the design requirements more, and the detection result is more accurate. Through improving bearing structure for working vane can be more steady supported, further improve measuring accuracy.

The term "plurality" as used in this embodiment means a number of "two or more". The above embodiments are provided for illustrative purposes only and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should fall within the scope of the present invention, and the scope of the present invention should be defined by the claims.