A measuring device for an aeroengine cowling

Abstract

The utility model discloses a kind of measuring appliances of aero-engine guard plate, belong to the field of aeronautical industry manufacturing.The measuring appliance of the aero-engine guard plate includes the upper part and the lower part of mortise and tenon connection, lower part is set below upper part, the lower part is used to place aero-engine guard plate;Radially be equipped with a dovetail notch on the upper part, a blind groove is respectively equipped on the two sides groove wall of dovetail notch, the blind groove is as tolerance zone notch;The upper surface of lower part has a dovetail tenon above, the dovetail tenon and dovetail notch cooperate to form dovetail guide rail, upper part is along dovetail guide rail sliding to measure height.The device can save the measurement cost of guard plate class parts, to improve measurement efficiency and quality qualification rate.

Description

Technical Field

[0001] This utility model belongs to the field of aviation industry manufacturing and relates to a measuring instrument for a protective plate for aircraft engines. Background Technology

[0002] The aircraft engine is the core power plant of an aircraft, and the precise measurement of its various components is crucial to ensuring engine performance and safety. As an important part of the aircraft engine, the dimensional accuracy of the protective plate directly affects the engine's operating efficiency and service life. Currently, the measurement of aircraft engine protective plates mainly relies on traditional measuring tools and methods, such as calipers and micrometers. These methods have many inconveniences when measuring protective plates with special shapes.

[0003] With the development of the aviation industry and the delivery of missions, the delivery requirements for aero-engine parts are quite urgent, including delivery quality and production cycle. Due to the special shape of aero-engine skid plates, the height dimensions have very high requirements in the later assembly stage. Measuring height dimensions using conventional measuring tools is time-consuming and labor-intensive, which cannot meet current delivery requirements. Therefore, in the field of aero-engine component measurement, various specialized measuring devices have been developed. For example, Chinese invention patent CN106767324A discloses a distance measuring device for measuring the profile of aero-engine blades. This device consists of a distance measuring plate for mounting the blade body and a tenon positioning block that matches the distance measuring plate for mounting the blade tenon. It can accurately measure the dimensions of the blade profile. Chinese invention patent CN108981526A proposes a fixture for measuring the straightness of the dovetail tenon of aero-engine blades. An inclined positioning plate is fixedly installed by a bracket, and a locking mechanism is fixedly installed on the inclined positioning plate. This ensures that the tenon is placed horizontally within the fixture, improving the inspection quality.

[0004] However, there are few dedicated measuring instruments for aircraft engine skid plates in the current technology, especially for measuring the height of skid plates with special shapes. Existing measurement methods have the following problems: First, measuring the height of special-shaped skid plates using conventional measuring instruments is complicated, requires multiple adjustments to the measurement position, and is time-consuming; second, the measurement process requires continuous operation by professional personnel, resulting in high labor costs; third, measurement accuracy is difficult to guarantee and is prone to errors; finally, existing measurement methods are inefficient and cannot meet the current production and delivery requirements of aircraft engine skid plates. These problems seriously restrict the production efficiency and quality control of aircraft engine skid plates.

[0005] Therefore, there is an urgent need to develop a tool specifically for measuring the height of aircraft engine skid plates, in order to improve measurement efficiency and accuracy, reduce labor costs, and meet the production and delivery needs of aircraft engine skid plates. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a measuring instrument for protective plates for aircraft engines, which can save the measurement cost of protective plate parts and improve measurement efficiency and quality pass rate.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] This utility model provides a measuring instrument for a protective plate for an aircraft engine, including an upper part and a lower part connected by mortise and tenon joints. The lower part is located below the upper part and is used to place the protective plate for the aircraft engine. A dovetail groove is radially formed on the upper part, and a blind groove is formed on each side wall of the dovetail groove, which serves as a tolerance zone groove. A dovetail tenon is located above the upper surface of the lower part. The dovetail tenon and the dovetail groove cooperate to form a dovetail guide rail. The upper part slides along the dovetail guide rail to measure the height.

[0009] In one embodiment, rounded corners are provided at both the bottom edge and the top edge of the dovetail groove.

[0010] In one embodiment, the lower part includes an integral first part and a second part, the first part being placed vertically and the second part being placed horizontally, the second part being located at the bottom of the first part, and the top of the first part having a dovetail tenon.

[0011] In one embodiment, the first portion contacts the height edge of the aircraft engine guard plate; the second portion contacts the non-height edge of the aircraft engine guard plate.

[0012] In one embodiment, the second part has a workpiece receiving groove.

[0013] In one embodiment, the workpiece receiving groove matches the non-height edge of the aircraft engine skid plate.

[0014] In one embodiment, the dovetail tenon has rounded corners at both its top and bottom edges.

[0015] In one embodiment, the blind groove is opened downward at the top of the groove near the dovetail opening.

[0016] In one embodiment, a gap exists between the blind groove and the upper surface of the lower portion, which serves as a tolerance.

[0017] In one embodiment, the acceptable height of the aircraft engine guard plate is greater than the height of the upper surface of the lower portion and less than the sum of the depth of the blind groove and the height of the upper surface of the lower portion.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This utility model provides a measuring instrument for aircraft engine skid plates. Through the mortise and tenon connection structure of the upper and lower parts, and the sliding design of the dovetail guide rail, the efficiency of measuring the height of the skid plate is increased by 5 times, and the quality pass rate is increased by 2 times, effectively solving the problems of long measurement time and high labor costs associated with conventional measuring tools. Firstly, in terms of cost savings, traditional measurements may require complex equipment or multiple adjustments, while the mortise and tenon connection and dovetail guide rail structure simplifies the assembly and adjustment process, reducing labor and time costs. The dovetail guide rail ensures measurement accuracy, reducing repeated measurements due to errors, thereby lowering costs. Secondly, in terms of efficiency improvement, the dovetail guide rail structure allows for smooth sliding of the upper part and rapid positioning, reducing measurement time. The blind groove, as a tolerance zone slot, directly corresponds to the acceptable height range of the skid plate. During measurement, it is only necessary to observe whether it is within the groove range, making the operation simple and quick, without complex calculations or adjustments, thus improving efficiency. Regarding the quality pass rate, the tolerance zone slot (blind groove) directly defines the acceptable height range, allowing for intuitive judgment of compliance during measurement, reducing human error, ensuring the accuracy of each measurement, and thus improving the pass rate. Meanwhile, the structural stability of the mortise and tenon joint and dovetail guide rail ensures the repeatability and consistency of measurements, avoiding misjudgments caused by equipment instability. This measuring instrument has a simple structure and is easy to operate. Simply place the guard plate in the appropriate position on the lower part, then slide the upper part, and quickly determine whether the guard plate height is within the tolerance range through the tolerance groove. This greatly improves measurement efficiency and meets the delivery quality and production cycle requirements of aero-engine parts. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the assembly of a measuring instrument for a protective plate for an aircraft engine according to the present invention;

[0021] Figure 2 This is a schematic diagram of a combined three-dimensional model component of a measuring instrument for a protective plate for an aircraft engine according to the present invention;

[0022] Figure 3 This is a schematic diagram of the upper part of this utility model;

[0023] Figure 4 This is a schematic diagram of the lower part of the present invention;

[0024] Figure 5 This is a schematic diagram illustrating the process of lowering the protective plate for an aircraft engine.

[0025] Figure 6 A three-dimensional schematic diagram of the process of lowering the protective plate for an aircraft engine;

[0026] Figure 7 A schematic diagram showing the completion of the lowering of the protective plate for an aircraft engine;

[0027] Figure 8 A three-dimensional schematic diagram showing the completion of the lowering of the protective plate for an aircraft engine;

[0028] Figure 9 This diagram illustrates the acceptable and unacceptable height of protective plates for aircraft engines.

[0029] Wherein: 1-upper part; 2-lower part; 3-aircraft engine guard plate. Detailed Implementation

[0030] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0036] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0037] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0038] The accompanying drawings show various structural schematic diagrams according to embodiments of the present invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions according to actual needs. The present invention will now be described in further detail with reference to the accompanying drawings:

[0039] See Figure 1 , Figure 2 , Figure 3 and Figure 4This utility model relates to a measuring instrument for aero-engine skid plates, belonging to the field of aero-engine component measurement technology. The measuring instrument includes an upper part 1 and a lower part 2, connected by a mortise and tenon structure. The upper part 1 has a dovetail groove radially formed, and a blind groove serving as a tolerance zone groove is formed on the groove wall. The lower part 2 is used to hold the aero-engine skid plate 3, including an integral first part and a second part lower than the first part. The top of the upper surface (first part) of the lower part 2 has a dovetail tenon that mates with the dovetail groove to form a dovetail guide rail. The upper part 1 can slide along the dovetail guide rail to measure the height. The second part has a workpiece receiving groove that matches the non-height edge of the skid plate. This measuring instrument, through its dovetail guide rail structure and tolerance zone groove design, can accurately measure the height dimension of the aero-engine skid plate, determine whether it is within the acceptable range, and improve measurement accuracy and efficiency.

[0040] Example 1

[0041] This embodiment provides a measuring instrument for a protective plate for an aircraft engine, which is divided into upper and lower parts. The lower part 2 is responsible for the placement of the protective plate 3 for the aircraft engine, and the upper part 1 is responsible for measuring the height of the protective plate 3 for the aircraft engine.

[0042] Specifically, it mainly consists of an upper part 1 and a lower part 2, which is located below the upper part 1 and is mortised and tenoned with the upper part 1.

[0043] The upper part 1 has a dovetail groove radially formed, and a blind groove is formed on each side wall of the dovetail groove, which serves as a tolerance zone groove. The bottom and top edges of the dovetail groove are rounded; this design reduces stress concentration and improves the service life of the measuring instrument. The blind grooves point downwards near the top of the dovetail groove, facilitating mating with the dovetail tenon of the lower part 2 and ensuring measurement accuracy.

[0044] The lower part 2 is used to house the aircraft engine guard plate 3. The lower part 2 includes an integral first part and a second part lower than the first part. The second part is placed horizontally, and the first part is placed vertically, with the second part located at the bottom of the first part. The top of the first part has a dovetail tenon, which mates with a dovetail groove to form a dovetail guide rail. The upper part 1 slides along the dovetail guide rail to measure height. The top and bottom edges of the dovetail tenon are rounded, a design that reduces friction with the dovetail groove, making the upper part 1 slide more smoothly.

[0045] The first part contacts the height edge of the aircraft engine skid plate 3 and is used to determine the measurement reference surface. The second part contacts the non-height edge of the aircraft engine skid plate 3 and is used to fix the position of the skid plate. A workpiece receiving groove is formed on the second part, which matches the non-height edge of the aircraft engine skid plate 3. This design can ensure the stability and positioning accuracy of the skid plate during the measurement process.

[0046] A gap exists between the blind groove and the first part, which serves as a tolerance. The acceptable height range for the edge of the aircraft engine skid plate is defined as the height greater than the height of the first part but less than the sum of the depth of the blind groove and the height of the first part. This design allows measuring instruments to intuitively determine whether the skid plate height is within the acceptable range, improving measurement efficiency and accuracy.

[0047] In a preferred embodiment, the depth of the blind slot can be adjusted according to the tolerance requirements of the aero-engine skid plate to meet the measurement needs of different skid plate models.

[0048] like Figures 5-8 When using it as shown, as Figure 5 As shown, place the protective plate into the lower slot, close to the slot surface of the lower part 2. Place the aircraft engine protective plate 3 on the lower part 2, so that the height edge of the protective plate contacts the first part, and the non-height edge is embedded in the workpiece receiving groove. Then move the upper part 1 to slide it along the dovetail guide rail. By observing the relative positional relationship between the blind groove and the first part, it can be determined whether the height of the protective plate is within the acceptable range.

[0049] like Figures 6-8 As shown, a sliding structure is provided at the contact point between the upper and lower parts. By sliding the upper part forward, the height edge of the guard plate can be checked using the tolerance groove provided on the upper part.

[0050] Figure 9 As shown, if the upper part 1 slides into the blind groove area and does not touch the top surface of the guard plate after exceeding the lower part, it indicates that the guard plate height is insufficient; if the upper part 1 does not slide into the blind groove area, but its edge has touched the guard plate, it indicates that the guard plate height is too high.

[0051] The aforementioned measuring instrument has a simple structure and is easy to operate. It can quickly and accurately measure the height of the protective plate for aircraft engines, thereby improving production efficiency and quality control.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of this utility model and should not be used to limit the scope of protection of this utility model. Any modifications made to the technical solutions based on the technical concept proposed by this utility model shall fall within the scope of protection of the claims of this utility model.

Claims

1. A measuring instrument for a protective plate of an aircraft engine, characterized in that, The upper part (1) and the lower part (2) are connected by mortise and tenon joints. The lower part (2) is used to place the protective plate (3) for the aircraft engine. A dovetail groove is radially opened on the upper part (1). A blind groove is opened on each side of the groove wall of the dovetail groove. The blind groove serves as a tolerance groove. A dovetail tenon is located above the upper surface of the lower part (2). The dovetail tenon and the dovetail groove cooperate to form a dovetail guide rail. The upper part (1) slides along the dovetail guide rail to measure the height.

2. The measuring instrument for aircraft engine guard plates according to claim 1, characterized in that, The dovetail groove has rounded corners at both the bottom and top edges.

3. The measuring instrument for aircraft engine skid plates according to claim 1, characterized in that, The lower part (2) includes an integral first part and a second part, the first part is placed vertically, the second part is placed horizontally, the second part is located at the bottom of the first part, and the top of the first part has a dovetail tenon.

4. The measuring instrument for aircraft engine skid plates according to claim 3, characterized in that, The first part is in contact with the height edge of the aircraft engine guard plate (3); the second part is in contact with the non-height edge of the aircraft engine guard plate (3).

5. The measuring instrument for aircraft engine skid plates according to claim 3, characterized in that, The second part has a workpiece receiving groove.

6. The measuring instrument for aircraft engine skid plates according to claim 5, characterized in that, The workpiece receiving groove matches the non-height edge of the protective plate (3) for aircraft engines.

7. The measuring instrument for aircraft engine skid plates according to claim 1, characterized in that, The dovetail tenon has rounded corners at both its top and bottom edges.

8. The measuring instrument for aircraft engine skid plates according to claim 1, characterized in that, The blind slot is opened downwards near the top of the dovetail slot.

9. The measuring instrument for aircraft engine skid plates according to claim 1, characterized in that, There is a gap between the blind groove and the upper surface of the lower part (2), which serves as a tolerance.

10. The measuring instrument for aircraft engine skid plates according to claim 1, characterized in that, The height of the upper surface of the lower part (2) is greater than the height of the upper surface of the lower part (2) and less than the sum of the depth of the blind groove and the height of the upper surface of the lower part (2). This height is the acceptable height of the edge of the protective plate (3) for the aircraft engine.

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