Clamp for measuring throat area of guide vane

Abstract

The utility model relates to the field of aero-engine manufacturing, in particular to a clamp for measuring the throat area of a guide vane, which comprises a support, a positioning surface, a limiting assembly and a clamping device are arranged on the support, the positioning surface comprises a first positioning surface and a second positioning surface, a through groove is arranged at one end of the support, and the clamping device is arranged in the through groove. One inner side wall of the through groove is the first positioning surface, the end surface of one end of the support is provided with the second positioning surface, the second positioning surface is an arc surface, the limiting assembly is fixedly connected with the support, and the clamping device is detachably connected with the side wall of the through groove. The positioning surface is arranged on the support, so that the corresponding position of the to-be-measured blade abuts against the positioning surface, and the to-be-measured blade is clamped and limited through the limiting assembly, thereby quickly determining the installation position of the to-be-measured blade, effectively reducing the iterative positioning measurement steps of the three-coordinate measurement machine tool, and improving the measurement efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of aero-engine manufacturing, and particularly relates to a clamp for measuring the throat area of a guide vane. BACKGROUND

[0002] The turbine guide vane of an aero-engine is located at the rear part of the engine combustion chamber, bears the impact of high-temperature and high-pressure gas, and guides the airflow to push the turbine working vane to work. The turbine guide vane needs to measure the passage points of the vane flow passage surface and calculate the throat area to evaluate the aerodynamic performance of the guide vane. The existing technical means is to measure the passage points of the vane flow passage surface by using a three-coordinate measuring machine and clamp the vane by using a general vice. The three-coordinate measuring machine needs to be positioned every time, which seriously affects the measurement efficiency. SUMMARY

[0003] The utility model solves the technical problem of how to quickly position and reduce the iterative positioning measurement steps of a three-coordinate machine bed when measuring the throat area of a guide vane, thereby improving the measurement efficiency.

[0004] The technical scheme for solving the above technical problem is as follows: a clamp for measuring the throat area of a guide vane, comprising: a support, the support is provided with a positioning surface, a limiting assembly, and a clamping device, the positioning surface comprises a first positioning surface and a second positioning surface, a through slot is formed in one end of the support, one of the inner side walls of the through slot is the first positioning surface, the second positioning surface is arranged on the end face of one end of the support, the second positioning surface is an arc surface, the limiting assembly is fixedly connected with the support, and the clamping device is detachably connected with the side wall of the through slot.

[0005] The utility model has the beneficial effects that: the positioning surface is arranged on the support, so that the corresponding position of the vane to be measured abuts against the positioning surface, the vane to be measured is clamped and limited by the limiting assembly, the mounting position of the vane to be measured is quickly determined, the vane to be measured is clamped and fixed by the clamping device, the clamping and mounting of the vane are completed, and the vane to be measured is removed after the measurement is completed, and the next vane to be measured is directly mounted. The device can be quickly positioned and mounted, the iterative positioning measurement steps of the three-coordinate measuring machine bed are effectively reduced compared with the previous clamping by using a general vice, and the measurement efficiency is improved.

[0006] On the basis of the above technical scheme, the utility model can also be improved as follows.

[0007] Further, a through hole is formed in one end of the support, the through hole penetrates through the through slot, the clamping device comprises a locking screw and a nut, one end of the locking screw penetrates through the through hole and is threadedly connected with the nut.

[0008] The beneficial effect of the further scheme is that the through hole is arranged to pass through the through groove, the blade to be measured is placed in the through groove, the locking screw passes through the through hole, and the nut is tightened, so that the blade to be measured is fixed, and the measurement is more stable.

[0009] Further, the base is fixedly connected to the other end of the support.

[0010] The beneficial effect of the further scheme is that the base is arranged, and the support is fixedly connected to the base, so that the device is more stable, and the blade measurement work can be more stable after the blade to be measured is clamped.

[0011] Further, the other end of the support is provided with a fixing plate, and the fixing plate is fixedly connected to the base.

[0012] The beneficial effect of the further scheme is that the fixing plate is arranged, so that the support and the base are fixedly connected.

[0013] Further, the fixing plate is perpendicular to the support.

[0014] The beneficial effect of the further scheme is that the fixing plate and the support are arranged perpendicularly, so that the blade to be measured is placed and measured more conveniently when the device is placed in the measurement space of the three-coordinate measuring machine.

[0015] Further, the first screw and the first pin are arranged, the first connecting hole and the first pin hole are arranged on the fixing plate, the second threaded hole and the second pin hole are arranged on the base in correspondence, the first screw passes through the first connecting hole and is threadedly connected to the second threaded hole, and the first pin is arranged in the first pin hole and the second pin hole.

[0016] The beneficial effect of the further scheme is that the fixing plate and the base are connected by the first screw and the first pin, that is, the support and the base are fixed.

[0017] Further, the first screw is a plurality of, and the first pin is a plurality of.

[0018] The beneficial effect of the further scheme is that the fixing plate and the base are fixedly connected by arranging a plurality of first screws and a plurality of first pins.

[0019] Further, the plurality of first screws and the plurality of first pins are arranged alternately.

[0020] The beneficial effect of the further scheme is that the fixing plate and the base are fixed by arranging a plurality of first screws and a plurality of first pins alternately, preliminarily positioning by the first pin, and locking by the first screw, so that the fixing plate and the base can be fixed quickly.

[0021] Further, the height of the support is greater than or equal to 150mm.

[0022] The beneficial effect of the further scheme is that the height of the support is greater than or equal to 150mm, so that the device clamped with the blade to be measured can be placed behind the worktable of the three-coordinate measuring machine, and the three-coordinate measuring rod can move below the blade, thereby facilitating measurement.

[0023] Further, the limiting component is a positioning pin, and the positioning pin is fixedly connected with one end face of the support.

[0024] The beneficial effect of the further scheme is that the positioning pin is arranged, and when the blade to be measured is placed, the corresponding position of the blade to be measured abuts against the positioning pin, thereby limiting the blade to be measured and quickly positioning the blade to be measured. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a perspective view of the guide vane throat area measuring clamp of the utility model;

[0026] Figure 2 is a front view of the guide vane throat area measuring clamp of the utility model;

[0027] Figure 3 is a side view of the guide vane throat area measuring clamp of the utility model;

[0028] Figure 4 is a use state schematic view of the guide vane throat area measuring clamp of the utility model;

[0029] Figure 5 is a use state side view of the guide vane throat area measuring clamp of the utility model.

[0030] In the drawings, the components represented by each reference numeral are listed as follows:

[0031] 1, base; 2, support; 3, positioning pin; 4, locking screw; 5, nut; 6, first screw; 7, first pin; 8, blade to be measured; 10, through slot; 11, through hole; 12, fixed plate. DETAILED DESCRIPTION

[0032] The principles and features of the utility model are described below in combination with the drawings, and the examples are only used to explain the utility model and are not used to limit the scope of the utility model.

[0033] As Figures 1-5As shown, the embodiment provides a fixture for measuring the throat area of a guide vane, comprising: a support 2, wherein a positioning surface, a limiting assembly and a clamping device are arranged on the support 2, the positioning surface and the corresponding position of the vane 8 to be measured abut, the positioning surface comprises a first positioning surface and a second positioning surface, one end of the support 2 is provided with a through slot 10, one of the inner side walls of the through slot 10 is the first positioning surface, the second positioning surface is arranged on the end face of one end of the support 2, the second positioning surface is a curved surface, the limiting assembly is fixedly connected with the support 2, and the clamping device is detachably connected with the side wall of the through slot 10.

[0034] The positioning surface is arranged on the support 2, so that the corresponding position of the vane 8 to be measured abuts against the positioning surface, and the limiting assembly is used to abut and limit the vane 8 to be measured, so as to quickly determine the installation position of the vane 8 to be measured, and the clamping device is used for clamping and fixing, so as to complete the clamping of the vane 8 to be measured and perform measurement. After the measurement is completed, the clamping device is loosened, the vane after the measurement is completed is taken out, and the next vane 8 to be measured is directly installed. The device can quickly position and install the vane, compared with the previous clamping by using a universal vise, the iterative positioning and measuring steps of the three-coordinate measuring machine are effectively reduced, and the measurement efficiency is improved.

[0035] Specifically, the center line of the through slot 10 and the center line of the end face of one end of the support 2 are parallel and do not coincide, that is, as shown in Figure 1 and Figure 3 , the through slot 10 is offset in the thickness direction of the support 2. Among them, the inner side wall of the side with large thickness of the through slot 10 is the first positioning surface.

[0036] On the basis of any of the above solutions, one end of the support 2 is provided with a through hole 11, the through hole 11 penetrates the through slot 10, the clamping device comprises a locking screw 4 and a nut 5, one end of the locking screw 4 penetrates the through hole 11 and is threadedly connected with the nut 5.

[0037] By arranging the through hole 11 and making the through hole 11 penetrate the through slot 10, after the vane 8 to be measured is placed in the through slot 10, the locking screw 4 penetrates the through hole 11 and is tightened by the nut 5, so as to tighten the two side walls of the through slot 10, thereby fixing the vane 8 to be measured, so that the measurement is more stable.

[0038] In a specific example, as shown in Figure 5 , the locking screw 4 is a hexagonal socket head cap screw, and the nut 5 is a butterfly nut. After the vane 8 to be measured is placed in the through slot 10, one end of the hexagonal socket head cap screw penetrates the through hole 11, the hexagonal socket head cap screw is located below the vane 8 to be measured after penetrating the through hole 11, and then the butterfly nut and one end of the hexagonal socket head cap screw are matched and the butterfly nut is screwed, so as to tighten the two side walls of the through slot 10 by the hexagonal socket head cap screw and the butterfly nut to clamp the vane 8 to be measured.

[0039] On the basis of any of the above solutions, a base 1 is further included, and the base 1 and the support 2 are fixedly connected at the other end.

[0040] By arranging the base 1 and fixedly connecting the support 2 and the base 1, the device is more stable, so that the blade measurement work can be more stably performed after clamping the blade 8 to be measured.

[0041] On the basis of any of the above solutions, a fixing plate 12 is arranged at the other end of the support 2, and the fixing plate 12 is fixedly connected with the base 1.

[0042] By arranging the fixing plate 12, the support 2 and the base 1 are fixedly connected.

[0043] On the basis of any of the above solutions, the fixing plate 12 is perpendicular to the support 2.

[0044] By arranging the fixing plate 12 and the support 2 to be perpendicular, the blade 8 to be measured is more conveniently placed and the measurement work is more conveniently performed when the device is placed in the measurement space of the three-coordinate measuring machine.

[0045] On the basis of any of the above solutions, a first screw 6 and a first pin 7 are further included, a first connecting hole and a first pin hole are arranged on the fixing plate 12, a second threaded hole and a second pin hole are correspondingly arranged on the base 1, the first screw 6 passes through the first connecting hole and is threadedly connected with the second threaded hole, and the first pin 7 is arranged in the first pin hole and the second pin hole.

[0046] The fixing plate 12 and the base 1 are connected by the first screw 6 and the first pin 7, that is, the support 2 and the base 1 are fixed.

[0047] Specifically, the first connecting hole is a through hole.

[0048] Specifically, the first screw 6 is an internal hexagonal screw.

[0049] On the basis of any of the above solutions, the first screw 6 is a plurality of, and the first pin 7 is a plurality of.

[0050] By arranging a plurality of first screws 6 and a plurality of first pins 7, the fixing plate 12 and the base 1 can be better fixed.

[0051] On the basis of any of the above solutions, the plurality of first screws 6 and the plurality of first pins 7 are arranged in a staggered manner.

[0052] By arranging the plurality of first screws 6 and the plurality of first pins 7 in a staggered manner, the fixing plate 12 and the base 1 are first preliminarily positioned by the first pin 7 and then locked by the first screw 6, so that the fixing plate 12 and the base 1 can be quickly fixed.

[0053] Specifically, the plurality of first screws 6 and the plurality of first pins 7 are arranged in two rows, the first screws 6 and the first pins 7 in each row are arranged alternately and spaced apart, and the first screws 6 and the first pins 7 in different rows are arranged oppositely.

[0054] In one specific example, as shown in Figure 1 and Figure 4 shown, the first screw 6 has 2, the first pin 7 has 2, the first screw 6 and the first pin 7 are arranged in two rows, one first screw 6 and one first pin 7 are arranged in one row, and one first pin 7 and the first screw 6 are arranged in the other row.

[0055] On the basis of any of the above solutions, the height of the support 2 is greater than or equal to 150mm.

[0056] The height of the support 2 is set to be greater than or equal to 150mm, so that the device clamped with the blade to be measured 8 is placed behind the workbench of the three-coordinate measuring machine, and the three-coordinate measuring rod can move below the blade, thereby facilitating measurement.

[0057] On the basis of any of the above solutions, the limiting component is a positioning pin 3, and the positioning pin 3 is fixedly connected with one end face of the support 2.

[0058] By arranging the positioning pin 3, when the blade to be measured 8 is placed, the corresponding position of the blade to be measured 8 abuts against the positioning pin 3, thereby limiting the blade to be measured 8 and quickly positioning it.

[0059] In one specific example, the steps of measuring the throat area of the guide vane are as follows:

[0060] S1, clamping the blade to be measured 8, placing the clamp on the workbench of the three-coordinate measuring machine, placing the blade to be measured 8 into the through slot 10, and making the corresponding positions of the blade to be measured 8 respectively contact and abut against the first positioning face and the second positioning face, and making the corresponding positions of the blade to be measured 8 and the positioning pin 3 be clamped, thereby completing the positioning of the blade to be measured 8, then passing the locking screw 4 through the through hole 11, cooperating with the nut 5 and tightening the nut 5, thereby completing the clamping and fixing of the blade to be measured 8;

[0061] S2, establishing a virtual coordinate, operating the three-coordinate measuring machine, thereby measuring and positioning the blade to be measured 8, and repeatedly taking points to position and further establish a virtual coordinate system;

[0062] S3, calculating the throat area of the blade, operating the three-coordinate measuring machine, measuring the passage points of the blade, and further calculating the throat area of the blade;

[0063] S4, replacing the blade and measuring and calculating the throat area, loosening the nut 5 to take out the measured blade, clamping the next blade to be measured 8 and directly performing the operation of step S3.

[0064] By adopting the clamp, the mounting position of the blade 8 to be measured is determined through the first positioning surface and the second positioning surface and the limiting assembly, so that when multiple blade measurements are performed, the mounting position of the blade 8 to be measured can be quickly determined, and clamping and fixing are performed through the clamping device, without the need to repeatedly perform the step S2, that is, without the need to perform point measurement positioning and establish a virtual coordinate system each time, so that iterative positioning measurement steps of the three-coordinate measuring machine are effectively reduced, and measurement efficiency is improved.

[0065] In the description of the utility model, it is to be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0066] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0067] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0068] In the utility model, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0069] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0070] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A fixture for measuring the throat area of ​​a guide vane, characterized in that, include: The support (2) is provided with a positioning surface, a limiting component and a clamping device. The positioning surface includes a first positioning surface and a second positioning surface. A through groove (10) is opened at one end of the support (2). One of the inner sidewalls of the through groove (10) is the first positioning surface. The end face of the support (2) is provided with the second positioning surface. The second positioning surface is an arc surface. The limiting component is fixedly connected to the support (2). The clamping device is detachably connected to the sidewall of the through groove (10).

2. The fixture for measuring the throat area of ​​a guide vane according to claim 1, characterized in that, One end of the support (2) is provided with a through hole (11), which passes through the through groove (10). The clamping device includes a locking screw (4) and a nut (5). One end of the locking screw (4) passes through the through hole (11) and is threadedly connected to the nut (5).

3. The fixture for measuring the throat area of ​​a guide vane according to claim 1, characterized in that, It also includes a base (1), and the other end of the base (1) and the support (2) are fixedly connected.

4. The fixture for measuring the throat area of ​​a guide vane according to claim 3, characterized in that, The other end of the support (2) is provided with a fixing plate (12), which is fixedly connected to the base (1).

5. The fixture for measuring the throat area of ​​a guide vane according to claim 4, characterized in that, The fixing plate (12) is perpendicular to the support (2).

6. The fixture for measuring the throat area of ​​a guide vane according to claim 5, characterized in that, It also includes a first screw (6) and a first pin (7). The fixing plate (12) is provided with a first connecting hole and a first pin hole. The base (1) is provided with a second threaded hole and a second pin hole. The first screw (6) passes through the first connecting hole and is threadedly connected to the second threaded hole. The first pin (7) passes through the first pin hole and the second pin hole.

7. The fixture for measuring the throat area of ​​a guide vane according to claim 6, characterized in that, There are multiple first screws (6) and multiple first pins (7).

8. The fixture for measuring the throat area of ​​a guide vane according to claim 7, characterized in that, Multiple first screws (6) and multiple first pins (7) are arranged alternately.

9. The fixture for measuring the throat area of ​​a guide vane according to claim 1, characterized in that, The height of the support (2) is greater than or equal to 150 mm.

10. A fixture for measuring the throat area of ​​a guide vane according to any one of claims 1-9, characterized in that, The limiting component is a positioning pin (3), which is fixedly connected to one end face of the support (2).

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