CN210243049U - Point contact testing device for testing residual stress of blade - Google Patents
Point contact testing device for testing residual stress of blade Download PDFInfo
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- CN210243049U CN210243049U CN201921677216.6U CN201921677216U CN210243049U CN 210243049 U CN210243049 U CN 210243049U CN 201921677216 U CN201921677216 U CN 201921677216U CN 210243049 U CN210243049 U CN 210243049U
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Abstract
A point contact testing device for testing residual stress of blades belongs to the technical field of testing residual stress of surfaces of blades of steam turbines and gas turbines and solves the problem of adjusting level of testing residual stress of non-planar characteristic designated measuring points of complex components. The utility model comprises a six-degree-of-freedom objective table, a point contact level gauge and a laser probe; the blade to be measured is arranged on a six-degree-of-freedom objective table, and the laser probe is arranged above the blade to be measured; the point contact level meter comprises a conical bracket, a cross dial and a magnetic column, wherein an axial mounting groove is formed in the small-diameter end of the conical bracket, the magnetic column is arranged in the axial mounting groove, the bottom of the magnetic column extends out of the axial mounting groove, the point contact level meter is adsorbed at a specified measuring point of a blade to be measured through the magnetic column, the cross dial is installed at the large-diameter end of the conical bracket, and air bubbles are arranged on the cross dial. The utility model discloses simple structure, convenient operation saves the time cost for test blade residual stress.
Description
Technical Field
The utility model relates to a testing arrangement for blade residual stress test, concretely relates to point contact testing arrangement for blade residual stress test belongs to steam turbine, gas turbine blade surface residual stress test technical field.
Background
Before testing the residual stress by using an X-ray stress meter, the surface of the point to be tested needs to be adjusted to be horizontal, and the point to be tested is superposed with the light spot. In the process of testing the residual stress on the surfaces of the blades of the steam turbine and the gas turbine, the blade to be tested has a complex structure, and an objective table of the conventional X-ray stress meter only has the functions of rotating and moving on a horizontal plane, so that the measurement cannot be carried out when a normal line of a specified measuring point forms a certain angle with the vertical direction. Meanwhile, due to the non-planar characteristics of the surface of the blade, the size of a common level gauge is far larger than that of a point to be measured of the blade, and the common level gauge cannot be attached to the surface of the blade to be measured, so that the designated measuring point of the blade cannot be horizontally adjusted.
SUMMERY OF THE UTILITY MODEL
A brief summary of the present invention is provided below in order to provide a basic understanding of some aspects of the present invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is discussed later.
In view of this, the utility model discloses a solve the spirit level can't with the blade surface laminating that awaits measuring, can't realize carrying out the problem of level control to the appointed measurement station of blade, and then designed a point contact testing arrangement for blade residual stress test, the rotational degree of freedom of stress appearance objective table has been increased for solved the appointed measurement station residual stress test of complicated component non-planar characteristic and adjusted the level problem, the device has simple structure, and convenient operation saves the time cost, has the advantage of fine level control effect to the approximate planar region of minizone.
A point contact testing device for testing residual stress of a blade comprises a six-degree-of-freedom objective table, a point contact level meter and a laser probe; the blade to be measured is arranged on a six-degree-of-freedom objective table, and the laser probe is arranged above the blade to be measured; the point contact level meter comprises a conical bracket, a cross dial and a magnetic column, wherein an axial mounting groove is formed in the small-diameter end of the conical bracket, the magnetic column is arranged in the axial mounting groove, the bottom of the magnetic column extends out of the axial mounting groove, the point contact level meter is adsorbed to a specified measuring point of a blade to be measured through the magnetic column, the cross dial is installed at the large-diameter end of the conical bracket, and air bubbles are arranged on the cross dial.
Further: the six-degree-of-freedom objective table comprises a vertical lifting table, an X-axis direction translational sliding pair, a Y-axis rotary sliding pair, an X-axis rotary sliding pair, a first adapter plate, a second adapter plate, a first arc adapter plate, a second arc adapter plate and an objective plate; a first transfer plate is arranged above the vertical lifting platform, and the first transfer plate and the vertical lifting platform realize X-axis direction translation through an X-axis direction translation sliding pair; a second adapter plate is arranged above the first adapter plate, and the first adapter plate and the second adapter plate realize Y-axis direction translation through a Y-axis direction translation sliding pair; a first arc-shaped adapter plate is arranged above the second adapter plate, and the first arc-shaped adapter plate and the second arc-shaped adapter plate rotate around the Y axis through an axis rotation sliding pair; a second arc adapter plate is arranged above the first arc adapter plate and rotates around the X axis through an X axis rotating sliding pair; the carrying plate and the second arc adapter plate are rotatably arranged; the blade to be measured is arranged on the carrying plate.
The utility model rotationally adjusts the six-degree-of-freedom objective table until the hollow bubble of the point contact level meter is positioned at the center of the cross dial; the laser head-up emitted light spot is accurately positioned at the center of the cross dial and is coincided with the air bubble. The six-degree-of-freedom objective table has rotational freedom degrees around an X axis, a Y axis and a Z axis and translational freedom degrees along the X axis, the Y axis and the Z axis.
Further: magnetic force post and axial mounting groove among the point contact spirit level are transition fit, satisfy D1 ═ D1, and D1 is the diameter of axial mounting groove, and D1 is the diameter of magnetic force post.
Further: the magnetic column bottom processing has the boss, and the boss diameter is D2, and highly is H, and the retaining ring is installed to the bottom of toper bracket, and the retaining ring is used for blocking the magnetic column, prevents that the magnetic column from droing, and the internal diameter of retaining ring is D2, and thickness is H, satisfies D2 > D2, and H < H. When the magnetic column is adsorbed on the blade, the contact surface of the magnetic column and the axial mounting groove has no friction and can slide relatively.
The utility model discloses the effect that reaches does:
the utility model discloses a X axle direction translation slip is vice, realize carrying the X direction translation adjustment of thing board, it is vice through Y axle direction translation slip, realize carrying the Y direction translation adjustment of thing board, it is vice through Y axle rotation slip, realize carrying the thing board around Y axle rotation adjustment, it is vice through X axle rotation slip, realize carrying the thing board around X axle rotation adjustment, rotate the installation through carrying thing board and second arc keysets, realize carrying the thing board around Z axle rotation adjustment, through the vertical lift platform, realize carrying the Z direction translation adjustment of thing board.
More than synthesizing, the utility model discloses increased the rotational degree of freedom of stress appearance objective table, solved the non-planar characteristic of complicated component and appointed measurement station residual stress test regulation level problem. The device has simple structure and convenient operation, saves time and cost, and has good horizontal adjustment effect on a small-range approximate plane area.
Drawings
FIG. 1 is a schematic diagram of a point contact testing device for testing residual stress of a blade according to the present invention;
FIG. 2 is a diagram of an initial state of position adjustment;
FIG. 3 is a state diagram after position adjustment is completed;
FIG. 4 is a front view of a point contact level;
FIG. 5 is a sectional view A-A of FIG. 4;
FIG. 6 is a top view of FIG. 4;
FIG. 7 is a partial cross-sectional view of the bracket;
FIG. 8 is a cross-sectional view of a magnetic column;
FIG. 9 is an isometric view of a six degree-of-freedom stage;
FIG. 10 is a front view of the stage;
FIG. 11 is a side view of the stage;
fig. 12 is a top view of the stage.
The specific reference numbers in the figures are: 1-six degree of freedom stage; 2-point contact level; 3-a laser probe; 4, measuring the leaf blade; 5-a cross dial; 6-a bracket; 7-magnetic pole; 8-axial mounting groove; 9-air bubbles; 10-a vertical lifting platform; 11-X axis direction translation sliding pair; 12-Y axis direction translation sliding pair; 13-Y axis rotating sliding pair; 14-X-axis rotating sliding pair; 15-a first transfer plate; 16-a second adapter plate; 17-a first arcuate adapter plate; 18-a second arcuate adaptor plate; 19-carrying plate; 20-a retainer ring.
Detailed Description
Exemplary embodiments of the present invention will be described hereinafter with reference to the accompanying drawings. In the interest of clarity and conciseness, not all features of an actual implementation are described in the specification. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which will vary from one implementation to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The meaning of "inside and outside" in the present invention means that the direction inside the pointing device is inside and vice versa for the device itself, rather than being specifically limited for the device mechanism of the present invention.
The utility model discloses in the meaning of "left and right" indicate that the reader is just when the drawing, the left side of reader is left promptly, and the right of reader is right promptly, and is not right the utility model discloses a specific limited of device mechanism.
The term "connected" as used herein may mean either a direct connection between elements or an indirect connection between elements through other elements.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the device structures and/or processing steps closely related to the solution according to the present invention are shown in the drawings, and other details not relevant to the present invention are omitted. Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1: with reference to fig. 1 to fig. 10, a point contact testing device for testing residual stress of a blade according to the present embodiment is specifically described as follows:
the device comprises a six-degree-of-freedom objective table 1, a point contact level meter 2 and a laser probe 3; the blade 4 to be measured is arranged on the six-degree-of-freedom objective table 1, and the laser probe 3 is arranged above the blade 4 to be measured;
the point contact level meter 2 comprises a conical bracket 6, a cross dial 5 and a magnetic column 7, and the six-degree-of-freedom objective table 1 comprises a vertical lifting table 10, an X-axis direction translational sliding pair 11, a Y-axis direction translational sliding pair 12, a Y-axis rotary sliding pair 13, an X-axis rotary sliding pair 14, a first adapter plate 15, a second adapter plate 16, a first arc adapter plate 17, a second arc adapter plate 18 and an objective plate 19;
an axial mounting groove 8 is formed in the small-diameter end of the conical bracket 6, the magnetic column 7 is arranged in the axial mounting groove 8, the bottom of the magnetic column 7 extends out of the axial mounting groove 8, the point contact level meter 2 is adsorbed at a designated measuring point of the blade 4 to be measured through the magnetic column 7, the cross dial 5 is arranged at the large-diameter end of the conical bracket 6, and air bubbles 9 are arranged on the cross dial 5;
a first transfer plate 15 is arranged above the vertical lifting platform 10, and the first transfer plate and the vertical lifting platform realize X-direction translation through an X-axis direction translation sliding pair 11; a second adapter plate 16 is arranged above the first adapter plate 15, and the first adapter plate and the second adapter plate realize Y-direction translation through a Y-axis direction translation sliding pair 12; a first arc-shaped adapter plate 17 is arranged above the second adapter plate 16, and the first arc-shaped adapter plate and the second arc-shaped adapter plate rotate around the Y axis through the Y-axis rotating sliding pair 13; a second arc adapter plate 18 is arranged above the first arc adapter plate 17, and the first arc adapter plate and the second arc adapter plate rotate around the X axis through the X axis rotating sliding pair 14; the object carrying plate 19 and the second arc adapter plate 18 are rotatably arranged; the blade 4 to be measured is mounted on the object plate 19.
The vertical lifting platform 10 comprises a bottom plate, a top plate and a plurality of electric push rods, bases of the electric push rods are fixedly installed on the bottom plate, and execution ends of the electric push rods are connected with the top plate to drive the top plate to move up and down to achieve translation along a Z axis.
The X-axis direction translational sliding pair 11, the Y-axis direction translational sliding pair 12, the Y-axis rotary sliding pair 13 and the X-axis rotary sliding pair 14 comprise sliding rails and sliding blocks which are matched to realize sliding; or replaced by an equivalent way of achieving relative sliding.
The rotational mounting of the carrier plate 19 and the second arc adapter plate 18 can be realized by the matching of a bearing and a bearing sleeve, or can be replaced by the equivalent way of realizing relative rotation.
The six-degree-of-freedom objective table 1 is rotationally adjusted until the point contacts with the air bubble 9 in the level 2 and is positioned at the center of the cross dial 5; the light spot emitted by the laser head-up 3 is accurately positioned at the center of the cross dial 5 and is coincided with the air bubble. The six-degree-of-freedom objective table 1 has rotational degrees of freedom around an X axis, a Y axis and a Z axis and translational degrees of freedom along the X axis, the Y axis and the Z axis. The X axis, the Y axis and the Z axis are coordinate axes in a Cartesian coordinate system.
More specifically: the magnetic column 7 and the axial mounting groove 8 in the point contact level gauge 2 are in transition fit, and D1 is D1, D1 is the inner diameter of the axial mounting groove 8, and D1 is the diameter of the magnetic column 7.
More specifically: the bottom of the magnetic column 7 is provided with a boss, the diameter of the boss is D2, the height of the boss is H, the bottom of the conical bracket 6 is provided with a check ring 20, the check ring 20 is used for blocking the magnetic column 7 and preventing the magnetic column from falling off, the inner diameter of the check ring is D2, the thickness of the check ring is H, and the requirements that D2 is larger than D2 and H is smaller than H are met. When the magnetic force column 7 is adsorbed on the blade 4, the contact surface of the magnetic force column 7 and the axial installation groove 8 can slide relatively without friction.
The above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (4)
1. A point contact testing device for testing residual stress of a blade is characterized by comprising a six-degree-of-freedom objective table (1), a point contact level meter (2) and a laser probe (3); the blade (4) to be tested is arranged on the six-degree-of-freedom objective table (1), and the laser probe (3) is arranged above the blade (4) to be tested; point contact spirit level (2) are including taper bracket (6), cross calibrated scale (5) and magnetic force post (7), the minor diameter end processing of taper bracket (6) has axial mounting groove (8), axial mounting groove (8) are arranged in magnetic force post (7), and magnetic force post (7) bottom stretches out axial mounting groove (8), point contact spirit level (2) adsorb in the appointed survey point department of awaiting measuring blade (4) through magnetic force post (7), cross calibrated scale (5) are installed to the major diameter end of taper bracket (6), be provided with air bubble (9) on cross calibrated scale (5).
2. The point contact testing device for testing the residual stress of the blade is characterized in that the six-degree-of-freedom objective table (1) comprises a vertical lifting table (10), an X-axis direction translational sliding pair (11), a Y-axis direction translational sliding pair (12), a Y-axis rotary sliding pair (13), an X-axis rotary sliding pair (14), a first adapter plate (15), a second adapter plate (16), a first arc adapter plate (17), a second arc adapter plate (18) and an objective plate (19); a first transfer plate (15) is arranged above the vertical lifting platform (10), and the first transfer plate realize X-axis direction translation through an X-axis direction translation sliding pair (11); a second adapter plate (16) is arranged above the first adapter plate (15), and the first adapter plate and the second adapter plate realize Y-axis direction translation through a Y-axis direction translation sliding pair (12); a first arc-shaped adapter plate (17) is arranged above the second adapter plate (16), and the first arc-shaped adapter plate and the second arc-shaped adapter plate rotate around the Y axis through a Y-axis rotating sliding pair (13); a second arc adapter plate (18) is arranged above the first arc adapter plate (17), and the first arc adapter plate and the second arc adapter plate rotate around an X axis through an X axis rotating sliding pair (14); the object carrying plate (19) and the second arc-shaped adapter plate (18) are rotatably arranged; the blade (4) to be measured is arranged on the carrying plate (19).
3. The point contact testing device for blade residual stress testing according to claim 2, characterized in that the magnetic force column (7) in the point contact level gauge (2) is in transition fit with the axial mounting groove (8), and the requirements that D1 is D1, D1 is the inner diameter of the axial mounting groove (8), and D1 is the diameter of the magnetic force column (7) are met.
4. The point contact testing device for the blade residual stress test is characterized in that a boss is machined at the bottom of the magnetic column (7), the diameter of the boss is D2, the height of the boss is H, a check ring (20) is installed at the bottom of the conical bracket (6), the check ring (20) is used for blocking the magnetic column (7), the inner diameter of the check ring is D2, the thickness of the check ring is H, and D2 > D2 and H < H are met.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921677216.6U CN210243049U (en) | 2019-10-09 | 2019-10-09 | Point contact testing device for testing residual stress of blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921677216.6U CN210243049U (en) | 2019-10-09 | 2019-10-09 | Point contact testing device for testing residual stress of blade |
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| Publication Number | Publication Date |
|---|---|
| CN210243049U true CN210243049U (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921677216.6U Active CN210243049U (en) | 2019-10-09 | 2019-10-09 | Point contact testing device for testing residual stress of blade |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113358258A (en) * | 2021-06-23 | 2021-09-07 | 中国航发沈阳发动机研究所 | System and method for testing residual stress of surface of engine blade |
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2019
- 2019-10-09 CN CN201921677216.6U patent/CN210243049U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113358258A (en) * | 2021-06-23 | 2021-09-07 | 中国航发沈阳发动机研究所 | System and method for testing residual stress of surface of engine blade |
| CN113358258B (en) * | 2021-06-23 | 2023-02-28 | 中国航发沈阳发动机研究所 | System and method for testing residual stress of surface of engine blade |
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