CN219890471U - Fixing tool suitable for L-shaped probe wind tunnel calibration - Google Patents

Abstract

The utility model discloses a fixing tool suitable for calibrating an L-shaped probe wind tunnel, which belongs to the field of probe calibration, and comprises a first deflection piece rotating in a horizontal plane, and a second deflection mechanism arranged on the first deflection piece and rotating in a vertical plane direction, wherein a cantilever arranged in parallel with the horizontal plane is fixedly arranged on the second deflection mechanism; the cantilever is detachably provided with a mounting piece parallel to the vertical plane, the mounting piece is provided with an adjustable mounting part, the mounting part is provided with a clamping seat for clamping the probe, the whole fixture can have three-dimensional adjustment capacity through the arranged first deflection piece, the second deflection mechanism, the cantilever, the mounting piece and the clamping seat, the probe can be rotated and horizontally and vertically moved, and when the probe is not coincident with the central position of the wind tunnel outlet, the tool can be adjusted to ensure that the probe is positioned at the correct position.

Description

Fixing tool suitable for L-shaped probe wind tunnel calibration

Technical Field

The utility model belongs to the technical field of probe calibration, and particularly relates to a fixing tool suitable for L-shaped probe wind tunnel calibration.

Background

During flow field measurement and control, a pressure probe is generally adopted to measure parameters such as pressure, speed and direction of a flow field. The L-shaped probe is most widely used when measuring the incoming flow of impeller machines, pipelines, wind tunnels and the like. The L-shaped probe can extend into the flow field from the side surface, so that disturbance to the flow field is reduced as much as possible, and accurate aerodynamic parameters of the flow field are obtained. After the production of a pressure probe is completed, the pressure probe needs to be calibrated and calibrated before being put into use. The probe is typically calibrated using a calibrated wind tunnel.

When the pressure probe is calibrated, the uniform and stable incoming flow is given to the calibration wind tunnel, a plurality of different deflection angles and pitch angles are given to the probe head in a main flow area, pneumatic parameters in various angle states are collected, and a calibration file of the probe is obtained through calculation. The probe has the following key points: on one hand, when the probe is installed on the calibration platform, the probe is ensured to be opposite to the incoming flow direction, and zero deflection and zero pitching are realized; on the other hand, since the calibre of the calibrated wind tunnel is generally small, it is necessary to ensure that the probe tip is fixed to the central position of the wind tunnel outlet as much as possible, and the tip position of the probe tip should remain unchanged during the yaw and pitch movements of the probe.

The currently employed fixture is shown in fig. 1. Wherein the calibration wind tunnel 1 provides an incoming flow for the L-shaped probe 2 to be calibrated, and the motorized turntable 3 and motorized turntable 6 provide a pitching and a yawing movement for the L-shaped probe 2, respectively. The two electric rotary tables are rigidly fixed through the extension plate 4 and the bracket 5. The L-shaped probe 2 passes through a circular hole in the middle of the electric turntable 6 and is fixed to the electric turntable 6 by clamping blocks 60 and 70. The axis of the outlet section of the calibration wind tunnel 1, the rotation center line of the electric turntable 3 and the rotation center line of the electric turntable 6 are intersected at one point, namely the position of the end part of the probe. The tool has the following problems: since the probe 2 needs to pass through the round hole in the middle of the electric turntable 6, the length of the probe head cannot exceed the radius of the round hole, otherwise, the probe head cannot be installed; the calibration table basically has no axial, transverse and longitudinal movement capability in incoming flow, and the overall adjustment performance of the calibration table is poor; therefore, there is a need for a probe clamping fixture that facilitates probe installation and provides better adjustment performance.

Disclosure of Invention

Aiming at the problems, the utility model provides the fixing tool suitable for the calibration of the L-shaped probe wind tunnel, which is convenient for adjusting the probe in various states and is convenient for installing and fixing the probe.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the fixing tool suitable for the L-shaped probe wind tunnel calibration comprises a first deflection mechanism rotating in a horizontal plane, and further comprises a second deflection mechanism rotating in a vertical plane direction, wherein the second deflection mechanism is arranged on the first deflection mechanism, and a cantilever which is arranged in parallel with the horizontal plane is fixedly arranged on the second deflection mechanism;

the cantilever is detachably provided with a mounting piece parallel to the vertical plane, the mounting piece is provided with an adjustable mounting part, a clamping seat for clamping the probe is arranged on the mounting part, and the position of the clamping seat is adjusted through the mounting part, so that the probe of the probe coincides with the center of the wind tunnel opening.

As a further improvement of the above technical solution, the mounting portion is a chute provided on the mounting member;

the mounting piece is also provided with a containing cavity which is convenient for the probe to pass through;

the symmetrical center line of the accommodating cavity and the rotation axis of the second deflection mechanism are positioned in the same plane.

As a further improvement of the above technical solution, the first deflection mechanism includes a first deflection member horizontally arranged, and a plurality of first positioning portions are provided on the first deflection member;

the first deflection piece is fixedly provided with a supporting seat fixed through the first positioning part.

As a further improvement of the technical scheme, the second deflection mechanism comprises a second deflection piece which is vertically arranged, and a plurality of second positioning parts which are convenient to mutually fix with the cantilever are arranged on the second deflection piece

The second deflection piece is fixedly provided with a connecting piece through the second positioning part.

As a further improvement of the above technical solution, the cantilever includes a first connection portion and a second connection portion;

the first connecting part is positioned on the top surface of the connecting piece, and an adjusting groove which is convenient for adjusting the distance between the cantilever and the wind tunnel in the horizontal direction is formed in the first connecting part.

As a further improvement of the above technical solution, a plurality of fixing holes which are convenient for positioning and fixing with the second deflection piece are fixedly arranged on one side surface of the first connecting part, which is close to the second deflection piece.

As a further improvement of the above technical solution, the second connecting portion is provided with a plurality of third positioning portions for facilitating adjustment of the mounting member.

The utility model has the beneficial effects that:

1. the utility model provides a fixing tool suitable for calibrating an L-shaped probe wind tunnel, which can enable the whole tool to have three-dimensional adjustment capability through a first deflection part, a second deflection mechanism, a cantilever, a mounting part and a clamping seat, can realize the rotation of a probe and the translational movement in the horizontal and vertical directions, and can adjust the tool to ensure that the probe is positioned at a correct position when the probe is not coincident with the central position of a wind tunnel outlet.

2. The mode that current L type probe passed from electric turntable center round hole is changed, through installed part, the holder that sets up, can realize stable centre gripping to the probe, and self possess certain regulating capacity, can adapt to the installation of the probe of the diameter of equidimension not, also can be suitable for the probe that has certain machining deviation or is special to have the offset probe, guarantee that different grade type probe can both align with the wind tunnel export after the installation, make the frock have better compatibility, improved the accuracy of probe wind tunnel calibration result simultaneously.

Drawings

FIG. 1 is a schematic diagram of a prior art tooling;

FIG. 2 is a schematic diagram of the overall structure of the present utility model;

FIG. 3 is a schematic view of the structure of FIG. 2 in the direction A;

FIG. 4 is a schematic view of the structure in the direction B in FIG. 2;

FIG. 5 is a schematic view of a partial enlarged structure at C in FIG. 3;

fig. 6 is a schematic structural view of the mounting member.

The text labels in the figures are expressed as: 10. a first deflection mechanism; 101. a first deflector; 102. a first positioning portion; 103. a support base; 11. a second deflection mechanism; 111. a second deflector; 112. a second positioning portion; 12. a cantilever; 121. a first connection portion; 1211. an adjustment tank; 1212. a fixing hole; 122. a second connecting portion; 1221. a third positioning portion; 13. a mounting member; 131. a mounting part; 132. a receiving chamber; 14. a clamping seat; 15. a connecting piece; 16. wind tunnel.

Detailed Description

In order that those skilled in the art may better understand the technical solutions of the present utility model, the following detailed description of the present utility model with reference to the accompanying drawings is provided for exemplary and explanatory purposes only and should not be construed as limiting the scope of the present utility model.

As shown in fig. 2-6 of the specification, as a specific embodiment of the present utility model, the specific structure of the present utility model is: the utility model provides a fixed frock suitable for calibration of L type probe wind tunnel, includes the first deflection mechanism 10 that rotates in the horizontal plane (the plane parallel with xy plane in figure 2), and first deflection mechanism 10 sets up on the support base, has still fixedly set up wind tunnel 16 on the support base, and the exit center of wind tunnel 16 is the y-axis, and first deflection mechanism 10's rotation center is the z-axis;

the probe comprises a first deflection mechanism 10, a second deflection mechanism 11 which is arranged on the first deflection mechanism 10 and rotates in the vertical plane (a plane parallel to the yz plane in fig. 2), the rotation center of the second deflection mechanism 11 is an x axis, the rotation of the probe along the horizontal plane and the rotation along the vertical plane can be adjusted through the first deflection mechanism 10 and the second deflection mechanism 11, a cantilever 12 which is arranged in parallel with the horizontal plane is fixedly arranged on the second deflection mechanism 11, and the cantilever 12 is positioned above the outlet of the wind tunnel 16 and spans the outlet of the wind tunnel 16.

The cantilever 12 is detachably provided with a mounting piece 13 parallel to a vertical plane, the mounting piece 13 is a mounting plate, the mounting piece 13 is provided with an adjustable mounting part 131, the mounting part 131 is provided with a clamping seat 14 for clamping a probe, the clamping seats 14 are V-shaped block clamping heads, two clamping heads are arranged, after the probe is clamped, the probe is fixed by bolts, and the position of the clamping seat 14 is adjusted through the mounting part 131, so that the probe head of the probe coincides with the center of a wind tunnel mouth; the mounting piece 13 is further provided with a containing cavity 132 which is convenient for the probe to pass through, when the probe of the probe has processing deviation or the probe of a special probe has offset, only one end of the clamping seat is fixed and the clamping seat is rotated through arranging the probe rod of the probe at the reaming position of the containing cavity 132, so that the probe is driven to perform translational fine adjustment in the z-axis direction, and the probe is still aligned to the center of the wind tunnel outlet.

Further optimizing on the basis of the embodiment: the mounting portion 131 is a chute provided on the mounting member 13; in this embodiment, the mounting portion 131 is provided with an upper portion and a lower portion, and is configured into a groove shape to adapt to L-shaped probes with different length dimensions, and the mounting position can be adjusted according to the length of the probes, and bolts are used between the mounting member 13 and the clamping seat 14 to fix the mounting member 13 and the clamping seat 14 through the mounting portion 131.

The accommodating cavity 132 is provided with a through groove, is in a shape of a C (refer to fig. 6) and is positioned between the upper and lower mounting portions 131, and the width of the accommodating cavity is larger than the outer diameter of the probe, so that the accommodating cavity is convenient to install more quickly when the probe is installed, is easier to install, can be convenient for the probe to adjust as required, and can adapt to the probes with different diameters.

The symmetrical center line of the accommodating cavity 132 and the rotation axis of the second deflection mechanism 11 are located in the same plane, the clamping seat 14 clamps the probe at the symmetrical center line of the accommodating cavity 132, so that the axis of the accommodating cavity 132 and the rotation axis of the second deflection mechanism 11 can be guaranteed to be in the same plane, and the probe can be overlapped at the origin of the xyz axis, so that accurate positioning is realized.

Further optimizing on the basis of the embodiment: the first deflection mechanism 10 comprises a first deflection piece 101 which is horizontally arranged, the first deflection piece 101 is plate-shaped, a first driving component is connected to the first deflection piece 101, the first driving component comprises a speed reducer which is fixedly arranged on a base, the input end of the speed reducer is connected with a motor, the output end of the speed reducer is connected with the first deflection piece 101, the first deflection piece 101 can be synchronously driven to rotate and deviate in the horizontal plane in the process of motor rotation, a plurality of first positioning parts 102 are arranged on the first deflection piece 101, the first positioning parts 102 are positioning holes which are arranged on the first deflection piece 101, and the positioning holes are arranged in two rows.

The first deflection member 101 is fixedly provided with a supporting seat 103 fixed by the first positioning portion 102, the first positioning portion 102 is provided with bolts for fixing the first deflection member 101 and the supporting seat 103 to each other, and the position of the supporting seat 103 away from the rotation center of the first deflection member 101 is changed by changing the bolts at different positions, so that the adjustment along the x-axis direction shown in fig. 2 is realized.

Further optimizing on the basis of the embodiment: the second deflection mechanism 11 comprises vertically arranged second deflection pieces 111, the second deflection pieces 111 are of a plate-shaped structure identical to that of the first deflection pieces 101, a second driving assembly is also connected to the second deflection pieces 111, the second driving assembly comprises a speed reducer fixed on the supporting seat 103, the input end of the speed reducer is connected with a driving motor, the output end of the speed reducer is connected with the second deflection pieces 111, a plurality of second positioning portions 112 which are convenient to fix with the cantilever 12 mutually are arranged on the second deflection pieces 111, and the second positioning portions 112 are also positioning holes identical to those of the first positioning portions 102.

The second deflection piece 111 is fixedly provided with a connecting piece 15 through the second positioning part 112, the connecting piece 15 is a connecting seat, the second deflection piece 111 and the connecting piece are mutually fixed through bolts, and different positions connected on the second deflection piece 111 are changed through changing different second positioning parts 112, so that displacement offset adjustment is realized.

Further optimizing on the basis of the embodiment: the cantilever 12 includes a first connecting portion 121 and a second connecting portion 122, and the first connecting portion 121 and the second connecting portion 122 have a T-shaped structure (refer to fig. 2); the first connecting portion 121 is located on the top surface of the connecting member 15, an adjusting groove 1211 that is convenient for adjusting the distance between the cantilever 12 and the wind tunnel 16 in the horizontal direction is provided on the first connecting portion 121, the adjusting groove 1211 is a long-strip-shaped sink groove, the fixing position between the first connecting portion 121 and the connecting member 15 can be changed through the provided adjusting groove 1211, displacement offset adjustment along the y-axis direction shown in fig. 2 is achieved, bolts that are mutually fixed with the connecting member 15 can be provided on the adjusting groove 1211, so that the connecting member 15 and the first connecting portion 121 are mutually fixed, a plurality of fixing holes 1212 that are convenient for mutually positioning and fixing the second deflecting member 111 are fixedly provided on one side surface of the first connecting portion 121 near the second deflecting member 111, and bolts that mutually fix the first connecting portion 121 and the second deflecting member 111 can be fixedly provided on the fixing holes 1212, so as to achieve a further fixing effect.

Further optimizing on the basis of the embodiment: the second connecting portion 122 is provided with a plurality of third positioning portions 1221 for adjusting the mounting member 13, and the third positioning portions 1221 are also positioning holes, so that displacement adjustment of the probe and the mounting member 13 along the x-axis direction can be conveniently adjusted.

The specific practical mode of the utility model is as follows: firstly, fixing a probe to be calibrated on a mounting piece 13 through a clamping seat 14, and ensuring that the probe of the probe is positioned at the origin position of xyz-axis coordinates in the illustration;

when the probe is fixed and cannot be overlapped with the origin of the xyz axis, the probe can be ensured to be at the correct position by adjusting the tool, and the rotation offset adjustment along the z axis can be realized for the probe by controlling the rotation of the first deflection piece 101; translational adjustment of the probe along the x-axis direction can be achieved by changing the mounting position of the support base 103 on the first deflection member 101 and the mounting position of the mounting member 13 on the cantilever 12; by controlling the rotation of the second deflection member 111, rotational offset adjustment of the probe along the x-axis can be achieved;

by changing the mounting position between the first connecting portion 121 and the connecting member 15 and the positions on the holder 14 and the mounting member 13, adjustment of the translation of the probe in the y-axis direction can be achieved; when the probe of the probe has machining deviation or the probe of a special probe has offset, only one end of the clamping seat is fixed and the clamping seat is rotated by placing the probe rod of the probe at the reaming position of the accommodating cavity, so that the probe is driven to perform translation fine adjustment in the z direction, the probe is still aligned to the center of the wind tunnel outlet, and the probe and the xyz axis origin are enabled to coincide through the adjustment, so that the normal calibration of the probe is ensured.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. The foregoing is merely illustrative of the preferred embodiments of this utility model, and it is noted that there is objectively no limit to the specific structure disclosed herein, since numerous modifications, adaptations and variations can be made by those skilled in the art without departing from the principles of the utility model, and the above-described features can be combined in any suitable manner; such modifications, variations and combinations, or the direct application of the inventive concepts and aspects to other applications without modification, are contemplated as falling within the scope of the present utility model.

Claims (7)

1. Fixed frock suitable for calibration of L type probe wind tunnel, its characterized in that: the device comprises a first deflection mechanism (10) rotating in a horizontal plane, and further comprises a second deflection mechanism (11) rotating in a vertical plane direction and arranged on the first deflection mechanism (10), wherein a cantilever (12) arranged in parallel with the horizontal plane is fixedly arranged on the second deflection mechanism (11);

the cantilever (12) is detachably provided with a mounting piece (13) parallel to the vertical plane, the mounting piece (13) is provided with an adjustable mounting part (131), the mounting part (131) is provided with a clamping seat (14) for clamping the probe, and the position of the clamping seat (14) is adjusted through the mounting part (131) so that the probe of the probe coincides with the center of the wind tunnel.

2. The fixture for calibrating an L-shaped probe wind tunnel according to claim 1, wherein: the mounting part (131) is a chute arranged on the mounting piece (13);

the mounting piece (13) is also provided with a containing cavity (132) which is convenient for the probe to pass through;

the symmetry center line of the accommodating cavity (132) and the rotation axis of the second deflection mechanism (11) are located in the same plane.

3. The fixture for calibrating an L-shaped probe wind tunnel according to claim 1, wherein: the first deflection mechanism (10) comprises a first deflection piece (101) which is horizontally arranged, and a plurality of first positioning parts (102) are arranged on the first deflection piece (101);

the first deflection piece (101) is fixedly provided with a supporting seat (103) fixed by the first positioning part (102).

4. A fixture for use in the calibration of an L-probe wind tunnel according to claim 3, wherein: the second deflection mechanism (11) comprises a second deflection piece (111) which is arranged vertically, and a plurality of second positioning parts (112) which are convenient to fix with the cantilever (12) are arranged on the second deflection piece (111)

The second deflection piece (111) is fixedly provided with a connecting piece (15) through the second positioning part (112).

5. The fixture for calibrating an L-shaped probe wind tunnel according to claim 4, wherein: the cantilever (12) comprises a first connecting part (121) and a second connecting part (122);

the first connecting part (121) is positioned on the top surface of the connecting piece (15), and an adjusting groove (1211) which is convenient for adjusting the distance between the cantilever (12) and the wind tunnel in the horizontal direction is formed in the first connecting part (121).

6. The fixture for calibrating an L-shaped probe wind tunnel according to claim 5, wherein: a plurality of fixing holes (1212) which are convenient for positioning and fixing the second deflection piece (111) are fixedly arranged on one side surface of the first connecting part (121) close to the second deflection piece (111).

7. The fixture for calibrating an L-shaped probe wind tunnel according to claim 6, wherein: the second connecting part (122) is provided with a plurality of third positioning parts (1221) which are convenient for adjusting the mounting piece (13).