CN222895703U

CN222895703U - A tool for three-coordinate measurement of the profile dimensions of a double-journal rectifier blade

Info

Publication number: CN222895703U
Application number: CN202520651863.9U
Authority: CN
Inventors: 任原昊; 黎俊玘; 梁鹏; 吴大兴
Original assignee: Sichuan Mianzhu Xinkun Machinery Making Co ltd
Current assignee: Sichuan Mianzhu Xinkun Machinery Making Co ltd
Priority date: 2025-04-09
Filing date: 2025-04-09
Publication date: 2025-05-23
Anticipated expiration: 2035-04-09

Abstract

The utility model discloses a tool for measuring the profile size of a double-shaft-neck rectifying blade in three coordinates, which relates to the field of blade profile measurement and comprises a base, wherein a centering clamping device is arranged on the base, the central axis of the centering clamping device after centering is perpendicular to the surface of the base, a horizontal positioning table is also arranged on the base, the top of the horizontal positioning table is provided with a sliding groove, a sliding block is connected in a sliding manner in the sliding groove, at least two positioning pins are arranged on the sliding block, the positions of all the positioning pins are not overlapped when the arrangement positions of the positioning pins are projected on the same horizontal plane, and the sliding stroke direction of the sliding groove is perpendicular to the central axis of the centering clamping device after centering. The utility model can effectively improve the efficiency and the precision of measuring the three coordinates of the profile size of the double-shaft neck rectifying blade.

Description

Tool for measuring three coordinates of profile size of double-shaft-neck rectifying blade

Technical Field

The utility model relates to the field of blade profile measurement, in particular to a tool for measuring the three coordinates of the profile size of a double-shaft-neck rectifying blade.

Background

The double journal rectifying vane has vanes with shafts at two ends, and is one part for improving airflow and reducing turbulence, and is used mainly in turbine machinery, especially in improving the efficiency and performance of turbine machinery. Therefore, when the double-journal rectifying vane is produced, whether the size of the double-journal rectifying vane meets the design requirement is important, and the double-journal rectifying vane is one of quality control factors of product production.

In order to facilitate measurement of three coordinates of the profile size of the double-journal rectifying blade, the double-journal rectifying blade is required to be clamped, the double-journal rectifying blade is vertically positioned by using a positioning hole with the same axial size as the double-journal rectifying blade to realize Z-direction positioning, then the positioning backup plate is attached to the blade to realize X-direction positioning of the blade, and an intersection point of the X direction and the Z direction is used as an origin point, and a direction perpendicular to the X direction and the Z direction is defined as a Y direction.

According to the traditional clamping mode, assembly intermittence is necessarily existed between the shaft and the positioning hole, namely the double-shaft-neck rectifying blade cannot guarantee a completely vertical state, the double-shaft-neck rectifying blade is easy to incline, so that measurement accuracy is low, in order to reduce the inclined size of the double-shaft-neck rectifying blade, the size of the positioning hole is as consistent as possible with that of the shaft, so that the shaft cannot be easily assembled into the positioning hole, and measurement efficiency is low.

Therefore, improvement on the clamping tool of the double-shaft-neck rectifying blade is needed.

Disclosure of utility model

The utility model aims to solve the problems, and provides a tool for measuring the three coordinates of the profile size of the double-shaft-neck rectifying blade, which can effectively improve the efficiency and the accuracy of measuring the three coordinates of the profile size of the double-shaft-neck rectifying blade.

The technical scheme includes that the tool for measuring the profile size of the double-shaft rectifying blade comprises a base, wherein a centering clamping device is arranged on the base, a central axis after centering and clamping by the centering clamping device is perpendicular to the surface of the base, a horizontal positioning table is further arranged on the base, a sliding groove is arranged at the top of the horizontal positioning table, a sliding block is connected in a sliding mode in the sliding groove, at least two positioning pins are arranged on the sliding block, the positions of all the positioning pins do not overlap when the arrangement positions of the positioning pins are projected on the same horizontal plane, and the sliding stroke direction of the sliding groove is perpendicular to the central axis after centering and clamping by the centering clamping device.

Further, the centering clamping device is a hydraulic knife handle.

Further, a gasket is placed on the top of the centering clamping device, and the top of the centering clamping device is lower than the top of the sliding block or the horizontal positioning table.

Further, the sliding block is detachably connected with the positioning pin.

Further, a height positioning mechanism is arranged on the base and used for positioning the height of a flow passage datum point on the double-journal rectifying vane.

Further, the height positioning mechanism comprises a screw rod fixed on the base, the screw rod is vertically arranged, a sleeve is sleeved on the screw rod, a supporting arm is arranged on the screw rod, one end of the supporting arm is fixedly connected with the sleeve, the other end of the supporting arm is provided with a through hole, a nut is connected to the screw rod through threads, and the nut is arranged below the sleeve to support the sleeve.

Further, the locating pin is in sliding connection with the sliding block and is locked through the locking mechanism.

Further, a sliding hole is formed in the sliding block, and the positioning pin is inserted into the sliding hole to realize sliding connection between the positioning pin and the sliding block.

Further, the locking mechanism is provided with a screw hole on the sliding block, the screw hole penetrates through the sliding hole, a screw is connected in the screw hole in a threaded mode, and when the locking mechanism locks the positioning pin, the screw is tightly propped against the surface of the positioning pin.

Further, the positioning pin is provided with graduations along the axial direction.

In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows:

1. the centering clamping device clamps the shaft of the double-shaft-neck rectifying blade, and is simple and convenient to operate and high in stability;

2. The utility model determines the Z axis through the centering clamping device, determines the Y axis through the side line of the sliding groove or the side line of the sliding block (the sliding travel direction of the sliding groove), and further determines the X axis by finding the three-dimensional origin of measurement through the intersection of the translation of the Y axis and the Z axis.

Drawings

The utility model will now be described by way of example and with reference to the accompanying drawings in which:

FIG. 1 is a schematic top view of the present utility model;

FIG. 2 is a schematic elevational view of the present utility model;

FIG. 3 is a schematic side view of the present utility model;

FIG. 4 is a schematic view of a height positioning mechanism according to the present utility model;

FIG. 5 is a schematic view of a positioning pin and slider slidingly coupled;

The drawing shows a 1-base, a 2-horizontal positioning table, a 21-chute, a 3-sliding block, a 31-sliding hole, a 32-screw, a 4-positioning pin, a 5-centering clamping device, a 6-double-shaft rectifying blade, a 7-gasket, an 8-standard component, a 9-screw rod, a 91-nut, a 92-sleeve, a 93-supporting arm and a 94-penetrating hole.

Detailed Description

In the description of the present specification, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship in which a product of the specification is conventionally put in use, it is merely for convenience of description of the specification and simplification of the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the specification.

Furthermore, the terms "horizontal," "vertical," and the like in the description herein do not denote absolute levels or overhangs of the components, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present specification, it should also be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and for example, the connection may be a fixed connection, a detachable connection, or an integral connection, may be a mechanical connection, or an electrical connection, may be a direct connection, or may be an indirect connection via an intermediary, or may be a communication between two elements.

Example 1

The tool for measuring the profile size of the double-shaft rectifying blade in three coordinates comprises a base 1, wherein a centering clamping device 5 is arranged on the base 1, the central axis of the centering clamping device 5 after centering is perpendicular to the surface of the base 1, a horizontal positioning table 2 is further arranged on the base 1, a sliding groove 21 is formed in the top of the horizontal positioning table 2, a sliding block 3 is slidably connected in the sliding groove 21, at least two positioning pins 4 are arranged on the sliding block 3, the positions of all the positioning pins 4 do not overlap when the arrangement positions of the positioning pins 4 are projected on the same horizontal plane, the number of the positioning pins 4 is preferably 2, the 2 positioning pins 4 are positioned on the same horizontal plane, and the sliding stroke direction of the sliding groove 21 is perpendicular to the central axis of the centering clamping device 5 after centering.

In this embodiment, the process of performing profile dimension measurement by the tool in cooperation with the measuring device is as follows:

The method comprises the steps of S1, determining a measurement origin by using a standard component 8, placing the standard component 8 as an axis component in a centering clamping device 5, centering the standard component 8 by the centering clamping device 5, scanning the standard component 8 by a measuring device after the clamping is finished so as to determine a Z axis, specifically, selecting at least 2 (preferably 3) sections at different positions on the standard component 8 by the measuring device, distributing all sections along the axial direction of the measuring component, acquiring at least 3 outside points (preferably 3) on the outermost side of each section, determining the center of a corresponding section according to the outside points, determining the Z axis by the center of all sections together, scanning the edge of a chute 21 or the edge of a sliding block 3 by the measuring device, translating the scanned line to intersect with the Z axis after the scanning is finished so as to determine a Y axis, further determining the three-dimensional origin of three-dimensional coordinates of the measuring device, and further generating an X axis which intersects with the three-dimensional origin and is perpendicular to the Z axis and the Y axis;

S2, disassembling a standard part 8, inserting the shaft of the double-journal rectifying blade 6 into a centering clamping device 5, pushing a sliding block 3, enabling a locating pin 4 to be abutted against the molded surface of the double-journal rectifying blade 6, determining the installation angle of the double-journal rectifying blade 6, enabling a flow passage datum point of the double-journal rectifying blade 6 to coincide with a three-dimensional origin at the moment, and then locking the double-journal rectifying blade 6 by utilizing the centering clamping device 5 to finish clamping of the double-journal rectifying blade 6 by the tool;

And S3, sliding the sliding block 3, enabling the positioning pin 4 to withdraw from the molded surface of the double-journal rectifying blade 6, and starting the measuring device to measure the molded surface size of the double-journal rectifying blade 6.

Through the description of the process, the fixture can be used for rapidly clamping and positioning the double-shaft-neck rectifying blade 6, and accurately positioning, so that the efficiency and the accuracy of measuring the three coordinates of the profile size of the double-shaft-neck rectifying blade 6 are effectively improved.

Example 2

Further embodiments are presented which can be implemented on the basis of example 1.

In a feasible implementation mode, the centering clamping device 5 is a hydraulic knife handle, the hydraulic knife handle is selected as a main body for clamping the double-journal rectifying blade 6, and the inner diameter of the knife handle is contracted by utilizing hydraulic pressure to realize clamping, so that the centering clamping device has the advantages of simplicity and convenience in operation, high stability and good interference resistance.

Of course, other devices capable of centering and clamping, such as a hydraulic chuck, may be used for the centering and clamping device 5.

In a possible implementation manner, for the two-journal rectifying blades 6 with different specifications, the positions of the flow passage datum points in the height are different, so that a gasket 7 can be placed on the top of the centering clamping device 5, the top of the centering clamping device 5 is lower than the top of the sliding block 3 or the horizontal positioning table 2, and the two-journal rectifying blades 6 are supported by the gasket 7 so as to compensate the position difference of the flow passage datum points and the three-dimensional origin in the Z axis, so that the flow passage datum points and the three-dimensional origin are ensured to coincide.

A possible embodiment is that the mounting angle of the profile is also different for different double-necked fairing blades 6, for which purpose the slider 3 is detachably connected to the positioning pins 4 in order to realize a change of the positioning pins 4 of different length, in fact the difference in length of the two positioning pins 4 is adjusted to match the different mounting angles.

Example 3

For the adjustment matching the "position of the flow path reference point" and the "mounting angle of the profile" in example 2, the following embodiment can be similarly adopted.

For the adjustment of matching of the position of the runner datum point, a height positioning mechanism can be arranged on the base 1 and used for positioning the height of the runner datum point on the double-shaft-neck rectifying blade 6, the height positioning mechanism comprises a screw rod 9 fixed on the base 1, the screw rod 9 is vertically arranged, a sleeve 92 is sleeved on the screw rod 9, one end of the supporting arm 93 is fixedly connected with the sleeve 92, the other end of the supporting arm 93 is provided with a through hole 94, the through hole 94 is used for enabling the shaft of the standard piece 8 or the double-shaft-neck rectifying blade 6 to pass through, a nut 91 is connected to the screw rod 9 in a threaded mode, the sleeve 92 is supported below the sleeve 91, specifically, the height of the sleeve 92 is adjusted through adjusting the position of the nut 91 and the screw rod 9, and then the height of the supporting arm 93 is adjusted, after the shaft of the double-shaft-neck rectifying blade 6 passes through the through hole 94, the supporting arm 93 supports the double-shaft-neck rectifying blade 6, and the height of the runner is adjusted, and the position difference of the datum point and the three-dimensional origin on the Z-axis is made up, and the overlapping of the runner and the three-dimensional origin is guaranteed. This mode can reduce the preparation of the gasket 7 and can realize stepless adjustment with higher adjustment accuracy than the mode disclosed in embodiment 2.

For adjustment of the "installation angle of the profiles" matching, the positioning pins 4 can be slidably connected with the slider 3 and locked by the locking mechanism, i.e. the size difference between the positioning pins 4 is adjusted by adjusting the size of each positioning pin 4 sliding out of the slider 3, thereby adjusting the installation angle of the profiles. Specifically, the sliding block 3 is provided with a sliding hole 31, the positioning pin 4 is inserted into the sliding hole 31 to realize sliding connection between the positioning pin 4 and the sliding block 3, the locking mechanism is provided with a screw 32 hole on the sliding block 3, the screw 32 hole penetrates through the sliding hole 31, the screw 32 is connected with the screw 32 in a threaded manner, and when the locking mechanism locks the positioning pin 4, the screw 32 is tightly propped against the surface of the positioning pin 4, namely, the positioning pin 4 is locked by the screw 32.

The length of the positioning pin 4 sliding out of the slider 3 is determined, and measurement can be performed by a minute and thousand-gauge. Or graduations are arranged on the positioning pin 4 along the axis direction, and the length of the sliding block 3 of the positioning pin 4 is intuitively acquired through the graduations.

The utility model is not limited to the specific embodiments described above. The utility model extends to any novel one, or any novel combination, of the features disclosed in this specification, as well as to any novel one, or any novel combination, of the steps of the method or process disclosed.

Claims

1. A tool for three-coordinate measurement of the profile dimensions of a double-journal straightening blade, characterized in that it comprises a base (1), a centering clamping device (5) is arranged on the base (1), and the center axis of the centering clamping device (5) after centering and clamping is perpendicular to the surface of the base (1); the base (1) is also provided with a horizontal positioning platform (2), the top of the horizontal positioning platform (2) is provided with a slide groove (21), a slider (3) is slidably connected in the slide groove (21), and at least two positioning pins (4) are arranged on the slider (3), the arrangement positions of all the positioning pins (4) do not overlap when projected on the same horizontal plane, and the sliding stroke direction of the slide groove (21) is perpendicular to the center axis of the centering clamping device (5) after centering and clamping.

2. The tooling according to claim 1, characterized in that the centering clamping device (5) is a hydraulic tool handle.

3. The tooling according to claim 1 is characterized in that a gasket (7) is placed on the top of the centering clamping device (5), and the top of the centering clamping device (5) is lower than the top of the slider (3) or the horizontal positioning table (2).

4. The tooling according to claim 1, characterized in that the slider (3) and the positioning pin (4) are detachably connected.

5. The tooling according to claim 1, characterized in that: a height positioning mechanism is provided on the base (1) for positioning the height of a reference point of the flow channel on the double-journal straightening blade (6).

6. The tooling according to claim 5 is characterized in that: the height positioning mechanism comprises a screw rod (9) fixed on the base (1), the screw rod (9) is arranged vertically, and a sleeve (92) is sleeved on the screw rod (9), and there is a support arm (93), one end of the support arm (93) is fixedly connected to the sleeve (92), and the other end is provided with a through hole (94); the screw rod (9) is threadedly connected to a nut (91), and the nut (91) is located below the sleeve (92) to support the sleeve (92).

7. The tooling according to claim 1, characterized in that the positioning pin (4) is slidably connected to the slider (3) and is locked by a locking mechanism.

8. The tooling according to claim 7, characterized in that: a sliding hole (31) is provided on the sliding block (3), and the positioning pin (4) is inserted into the sliding hole (31) to achieve a sliding connection between the positioning pin (4) and the sliding block (3).

9. The tooling according to claim 8 is characterized in that: the locking mechanism is provided with a screw (32) hole on the slide block (3), the screw (32) hole passes through the slide hole (31), and a screw (32) is threadedly connected to the screw (32) hole, and when the locking mechanism locks the positioning pin (4), the screw (32) is pressed against the surface of the positioning pin (4).

10. The tooling according to claim 7, characterized in that: the positioning pin (4) is provided with a scale along the axial direction.