Measuring tool for detecting root height and hole site of blade of axial flow fan

Abstract

The utility model discloses an axial flow fan blade root height and hole site detection measuring tool, which comprises a base, a first measuring piece and a second measuring piece, the base is provided with a limiting hole, the limiting hole is configured to limit the root of a fan blade, the periphery of the limiting hole is symmetrically provided with a plurality of mounting holes, the first measuring piece is mounted on the base in a replaceable manner, and the second measuring piece is mounted on the base in a replaceable manner. The top of the first measuring piece is provided with a detection platform, the detection platform is in an arc shape, the radian of the detection platform is matched with the radian of the arc adapter surface of the root of the fan blade, the middle of the detection platform is provided with a through hole, and the second measuring piece is movably installed in the installation hole. And the second measuring piece is configured to limit the fan blade and detect the hole site of the fan blade. According to the axial flow fan blade root height and hole site detection measuring tool, the first measuring piece is replaced, so that the detection measuring tool can detect fan blades of different models and sizes, the whole detection measuring tool is prevented from being replaced, and the effect of reducing the use cost is achieved.

Description

Technical Field

[0001] The utility model embodiment relates to the technical field of fan blade detection, and in particular to a measuring tool for detecting the root height and hole position of an axial flow fan blade. Background Art

[0002] Axial flow fans are widely used. They are fans in which the airflow direction is in the same direction as the axis of the fan blades. For example, electric fans and air conditioner outdoor fans are fans that run in an axial flow mode. They are called "axial flow" because the air flows parallel to the fan axis. Axial flow fans are usually used in situations where the flow rate requirements are high and the pressure requirements are low. Axial flow fans are fixed in place and move the air.

[0003] There are many types of axial fan blades with different geometric dimensions, arc surface sizes, and hole position relationships relative to the profile. Different inspection tools need to be replaced according to different sizes and models. Therefore, it is necessary to store inspection tools for different sizes and models, which results in high cost of use. Utility Model Content

[0004] In order to solve the related technical problems, the utility model provides a blade root height and hole position detection measuring tool for an axial flow fan to solve the problem of high use cost.

[0005] To achieve the above purpose, the embodiment of the utility model adopts the following technical solutions:

[0006] A measuring tool for detecting the root height and hole position of an axial flow fan blade comprises a base, a first measuring piece and a second measuring piece, wherein:

[0007] The base is provided with a limiting hole, the limiting hole is configured to limit the root of the fan blade, and a plurality of mounting holes are symmetrically arranged around the periphery of the limiting hole.

[0008] The first measuring piece can be replaced and installed on the base. A detection platform is arranged on the top of the first measuring piece. The detection platform is in an arc shape. The curvature of the detection platform matches the curvature of the arc transition surface at the root of the fan blade. A through hole is arranged in the middle of the detection platform.

[0009] The second measuring member is movably installed in the installation hole, and the second measuring member is configured to limit the position of the fan blade and detect the hole position of the fan blade.

[0010] Four positioning keys are equidistantly arranged on the top of the periphery of the base.

[0011] The first measuring member is provided with a positioning groove matching the positioning key, the positioning groove and the positioning key are arranged correspondingly, and the positioning groove and the positioning key are detachably connected via a fastener.

[0012] The through hole is coaxially arranged with the limiting hole.

[0013] The first measuring member is also provided with a positioning hole, and a positioning pin is arranged in the positioning groove.

[0014] The second measuring member is a position measuring rod, and one end of the position measuring rod is slidably installed in the installation hole.

[0015] The beneficial effects of the utility model are as follows: compared with the prior art, the axial flow fan blade root height and hole position detection measuring tool provided by the utility model has the following beneficial effects:

[0016] 1. By replacing the first measuring piece, the measuring tool can detect wind turbine blades of different models and sizes, avoiding the need to replace the entire measuring tool, which has the effect of reducing the use cost;

[0017] 2. The fan blades are limited by the limiting holes and positioning pins, which has the effect of improving the detection efficiency;

[0018] 3. The root height and the size of the arc surface of the fan blade are detected by the detection platform in cooperation with the first measuring piece, and the fan blade is limited and the hole position of the fan blade is detected by the second measuring piece. Various sizes can be detected, which has the effect of improving detection efficiency and reducing use costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate and understand the technical solutions in the embodiments of the present invention, the following briefly introduces the background technology of the present invention and the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0020] Figure 1 It is a structural schematic diagram of a measuring tool for detecting the root height and hole position of an axial flow fan blade provided by an embodiment of the utility model;

[0021] Figure 2 It is a structural schematic diagram of a measuring tool for detecting the root height and hole position of an axial flow fan blade provided by an embodiment of the utility model;

[0022] Figure 3 It is a structural schematic diagram of a measuring tool for detecting the root height and hole position of an axial flow fan blade provided by an embodiment of the utility model;

[0023] Figure 4 It is a structural schematic diagram of a measuring tool for detecting the root height and hole position of an axial flow fan blade provided by an embodiment of the utility model;

[0024] Figure 5 It is a structural schematic diagram of a measuring tool for detecting the root height and hole position of an axial flow fan blade provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0025] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0026] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively with reference to the relevant drawings. The preferred embodiments of the utility model are given in the drawings. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thoroughly understood. It should be noted that when a component is referred to as "fixed to" another component, it can be directly on another component or there can also be a central component. When a component is considered to be "connected" to another component, it can be directly connected to another component or there may be a central component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes and are not intended to be the only implementation method. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by technicians in the technical field of the utility model. The terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0027] See also Figures 1 to 4 As shown, the present embodiment provides a root height and hole position detection measuring tool for an axial flow fan blade 4, which comprises a base 1, a first measuring piece 2 and a second measuring piece 3. A limit hole 11 is provided on the base 1, and the limit hole 11 is configured to limit the root of the fan blade 4. A plurality of mounting holes 12 are symmetrically provided around the periphery of the limit hole 11. The first measuring piece 2 can be replaceably installed on the base 1. A detection platform 21 is provided on the top of the first measuring piece 2. The detection platform 21 is in an arc shape, and the curvature of the detection platform 21 matches the curvature of the arc transition surface at the root of the fan blade 4. A through hole 22 is provided in the middle of the detection platform 21. The second measuring piece 3 is movably installed in the mounting hole 12. The second measuring piece 3 is configured to limit the fan blade 4 and detect the hole position of the fan blade 4.

[0028] It can be seen that the root of the fan blade 4 passes through the through hole 22 and docks with the limiting hole 11. The limiting hole 11 limits the vertical and horizontal directions of the fan blade 4. The hole position at the root of the fan blade 4 docks with the second measuring piece 3 installed in the mounting hole 12 to detect the hole position and limit the fan blade 4 at the same time. Taking the detection platform 21 on the base 1 as a reference, the height difference between the arc transition surface at the root of the fan blade 4 and the detection platform 21 is judged to detect the arc size and height size of the arc transition surface.

[0029] Specifically, the second measuring piece 3 is slidably fitted in the mounting hole 12, and the other hole positions on the fan blade 4 are inspected by taking out the second measuring piece 3 installed in the other mounting holes 12. If the second measuring piece 3 passes smoothly, the hole position size is qualified; if the second measuring piece 3 cannot pass smoothly, the hole position size is unqualified.

[0030] As an implementation manner, four positioning keys 13 are equidistantly arranged on the top of the periphery of the base 1 .

[0031] It can be seen that by arranging four positioning keys 13 on the periphery of the base 1 to support the first measuring piece 2, high stability is achieved, which prevents the first measuring piece 2 from being deformed during detection and affecting the detection accuracy.

[0032] As an implementation manner, a positioning groove 23 matching the positioning key 13 is opened on the first measuring member 2, the positioning groove 23 and the positioning key 13 are arranged correspondingly, and the positioning groove 23 and the positioning key 13 are detachably connected via a fastener.

[0033] It can be seen that the base 1 and the first measuring member 2 are replaceably connected through the positioning key 13, the positioning groove 23 and the fastener, the structure is simple, the connection is stable, and the detection accuracy is guaranteed.

[0034] As an implementation manner, the through hole 22 and the limiting hole 11 are coaxially arranged.

[0035] It can be seen that by arranging the through hole 22 and the limiting hole 11 coaxially, it is convenient for the root of the fan blade 4 to penetrate into the limiting hole 11 for limiting, thereby improving the detection efficiency.

[0036] Specifically, the limiting hole 11 is arranged in the middle position of the base 1 .

[0037] As an implementation manner, a positioning hole 24 is further provided on the first measuring member 2 , and a positioning pin 5 is provided in the positioning hole 24 .

[0038] It can be seen that the provision of the positioning pin 5 can limit the rotation of the fan blade 4 and improve the detection efficiency.

[0039] As an implementation manner, the second measuring member 3 is a position measuring rod, one end of which is slidably installed in the installation hole 12 .

[0040] Specifically, the second measuring piece 3 is slidably fitted in the mounting hole 12. The second measuring piece 3 can be installed in mounting holes 12 at different positions according to the hole positions on the fan blade 4. The second measuring pieces 3 in other mounting holes 12 can be taken out and inserted into the holes on the fan blade 4 to detect whether the holes of the fan blade 4 meet the requirements.

[0041] The specific working principle of the above-mentioned axial fan blade 4 blade height and hole position detection measuring tool is as follows:

[0042] The root of the fan blade 4 passes through the through hole 22 and docks with the limiting hole 11, and the hole at the root of the fan blade 4 docks with the second measuring piece 3, so as to limit the fan blade 4 and detect the hole position. The positioning pin 5 limits the fan blade 4, and takes the detection platform 21 on the base 1 as a reference to judge the height difference between the arc transition surface at the root of the fan blade 4 and the detection platform 21, so as to detect the arc size and height size of the arc transition surface.

[0043] In the embodiments disclosed in the present invention, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "connect" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the embodiments disclosed in the present invention can be understood according to specific circumstances.

[0044] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A measuring tool for detecting the root height and hole position of an axial flow fan blade, characterized in that: The axial flow fan blade root height and hole position detection measuring tool comprises a base, a first measuring piece and a second measuring piece, wherein: The base is provided with a limiting hole, the limiting hole is configured to limit the root of the fan blade, and a plurality of mounting holes are symmetrically arranged around the periphery of the limiting hole. The first measuring piece can be replaced and installed on the base. A detection platform is arranged on the top of the first measuring piece. The detection platform is in an arc shape. The curvature of the detection platform matches the curvature of the arc transition surface at the root of the fan blade. A through hole is arranged in the middle of the detection platform. The second measuring member is movably installed in the installation hole, and the second measuring member is configured to limit the position of the fan blade and detect the hole position of the fan blade.

2. The axial flow fan blade root height and hole position detection measuring tool according to claim 1 is characterized in that: Four positioning keys are equidistantly arranged on the top of the periphery of the base.

3. The axial flow fan blade root height and hole position detection measuring tool according to claim 2 is characterized in that: The first measuring member is provided with a positioning groove matching the positioning key, the positioning groove and the positioning key are arranged correspondingly, and the positioning groove and the positioning key are detachably connected via a fastener.

4. The axial flow fan blade root height and hole position detection measuring tool according to claim 1, characterized in that: The through hole is coaxially arranged with the limiting hole.

5. The axial flow fan blade root height and hole position detection measuring tool according to claim 3, characterized in that: The first measuring member is also provided with a positioning hole, and a positioning pin is arranged in the positioning groove.

6. The axial flow fan blade root height and hole position detection measuring tool according to claim 1, characterized in that: The second measuring member is a position measuring rod, and one end of the position measuring rod is slidably installed in the installation hole.

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