Measuring tool for blade tip of rotor blade of aero-engine

Abstract

A rotor blade tip measuring tool of an aero-engine comprises a measuring tool body, a measuring supporting structure on the upper half portion of the measuring tool body and an angle block. The measurement supporting structure of the upper half part of the whole measuring tool consists of a measuring block, a left positioning block, a right positioning block and a side stop block; the measuring tool body structurally comprises a hollow cylinder, an ejector block, an ejector rod, a cylindrical pin, a spring, a limiting block, a propelling shaft, a tail cover, an end cover, a limiting screw and a homemade screw. A measuring block leaning against the side surface of the blade is arranged on one side right above the measuring tool body, the left positioning block and the right positioning block form a groove to clamp the blade, and a side stop block for stopping the blade is arranged at one end of the groove; the middle of the measuring tool body is a hollow cylinder which is transversely and vertically crossed with each other, a propelling shaft and an ejector rod are respectively arranged in transverse and vertical spaces in the hollow cylinder, the ejector rod is propped against a plane with an inclined plane on the surface of the propelling shaft, and the inclined plane ejector rod is in direct contact with the propelling shaft; when the propelling shaft transversely moves, the ejector rod is driven to move up and down. The device can realize rapid positioning and precision measurement of the blade and is simple to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of aeroengine blade measurement, in particular to a rotor blade tip measuring tool for an aeroengine. Background Art

[0002] Aircraft engine blades are key components in aircraft engines, and the manufacturing accuracy directly affects the performance of the engine. Due to the characteristics of aircraft engine rotor blades such as distortion, thin walls, and complex structures, it becomes complicated and difficult to measure the blades, especially the tip part, which has different shapes and high accuracy requirements. Traditional measurement methods have other problems such as inconvenient operation, poor stability, low accuracy, or long time consumption. Utility Model Content

[0003] In order to solve the above problems, the purpose of the utility model is to provide a rotor blade tip measuring tool for an aircraft engine, which can quickly locate, stably fix and measure with high precision, is easy to operate, and improves measurement efficiency and accuracy.

[0004] The technical solution of the utility model is: a rotor blade tip measuring tool for an aircraft engine, comprising a measuring body and a measuring support structure of the upper half of the measuring body and an angle block 17; the measuring support structure of the upper half of the measuring tool as a whole is composed of a gauge block 1, a left positioning block 3, a right positioning block 5 and a side stopper 4, and the measuring body 16 structure comprises a hollow cylinder, a top block 6, a top rod 11, a cylindrical pin 7, a spring 8, a limit block 12, a propulsion shaft 13, a tail cover 10, an end cover 15, a limit screw 9 and a self-made screw 14. A gauge block 1 is installed on one side directly above the measuring body 16, which is leaned against by the side of the blade. The left positioning block 3 and the right positioning block 5 form a groove to clamp the blade, and a side block 4 for blocking the blade is provided at one end of the groove; the middle of the measuring body 16 is a hollow cylinder that crosses each other horizontally and vertically, and the horizontal and vertical spaces in the hollow cylinder are respectively installed with a propulsion shaft and a push rod 11, the push rod is pressed on the inclined plane on the surface of the propulsion shaft, and the inclined push rod is in direct contact with the propulsion shaft; when the propulsion shaft moves horizontally, the push rod moves up and down.

[0005] Furthermore, the measuring body 16 is used as the main structure, and a gauge block 1 is installed on one side just above the measuring body 16, which is fixed on the measuring body 16 by a cylindrical pin of a screw, and the top block 6 and the top rod 11 are connected together by a cylindrical pin 7 to tighten the blade 2. There is a gap between the upper part of the top rod 11 and the measuring body 16 for placing the spring 8, and there is a groove on the left side to prevent the top rod 11 from rotating with a limit screw 9. The up and down movement of the top rod 11 depends on the upward force of the conversion part when the propulsion shaft 13 moves horizontally below.

[0006] Further, the left and right movement of the propulsion shaft 13 is controlled by the self-made screw 14 on the right side. The tail cover 10 and the end cover 15 are fixed with screws on both sides of the cross-sectional hollow cylindrical part of the measuring body 16, and the lowest angle block 17 is used to adjust the angle of the blade tip.

[0007] Further, the tail cover 10 and the end cover 15 play a role in sealing and dustproofing, and the self-made screw 14 is screwed in the middle of the end cover. The lowest angle block 17 is used to level the blade tip according to the angle of the blade tip.

[0008] Furthermore, there is a transition structure limit block 12 between the push rod 11 and the propulsion shaft 13 .

[0009] Furthermore, a groove is provided on the left side to prevent the top rod 11 from rotating with a limit screw 9.

[0010] Furthermore, the measuring surface of the gauge block 1 is provided with two planes of different heights, one open and one closed, which are set according to the blade tip tolerance.

[0011] Furthermore, the upper end surface of the top block 6 contacting the blade root is designed to be two separate semicircular arc structures, which can better adjust the force direction of the blade by pressing the blade 2 through two lines of contact and improve the overall stability.

[0012] Furthermore, a spring 8 is placed in the gap between the push rod 11 and the measuring body 6 to play the role of rebounding the push block when the blade is loosened, so as to facilitate the rapid replacement of the clamped blade.

[0013] Furthermore, the push rod 11, the propulsion shaft 13 and the limit block 12 can convert the lateral force into a vertical force by using the combination of inclined surfaces with appropriate angles. When the propulsion shaft 13 moves horizontally, it drives the limit block 12 and the push rod 11 to move upward. It is required that the contact inclined surfaces are as smooth as possible to reduce friction.

[0014] Furthermore, there is a transition structure stopper 12 between the push rod 11 and the propulsion shaft 13. The semi-cylindrical shape is embedded inside the push rod 11, and the inclined surface is in direct contact with the propulsion shaft 13. Without this structure, the push rod 11 and the propulsion shaft 13 are in direct contact, which may cause an error in the angle of the two contact inclined surfaces, resulting in the two surfaces not being completely aligned and only being in linear contact. The stopper 12 can solve this problem and automatically adjust the direction of force when subjected to force.

[0015] Furthermore, the end cover is fixed on the measuring body and has a thread in the middle which cooperates with the self-made screw.

[0016] Furthermore, the protruding portion of the top of the self-made screw is combined with the inner groove portion of the propulsion shaft to drive the propulsion shaft to move forward and backward.

[0017] Beneficial effects: The device of the utility model can realize rapid positioning and high-precision measurement of blades, is easy to operate, and improves measurement efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the blade tip measuring tool of the utility model, the following structural schematic diagram is attached for a brief introduction.

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2A , 2B They are respectively a cross-sectional view and a side view of the internal structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the blade structure of the utility model;

[0022] Figure 4 It is a schematic diagram of the gauge block structure of the utility model;

[0023] Figure 5 This is a schematic diagram of a pair of left and right positioning blocks of the utility model;

[0024] Figure 6 This is a schematic diagram of the side block structure of the utility model;

[0025] Figure 7 It is a schematic diagram of the top block structure of the utility model;

[0026] Figure 8 This is a schematic diagram of the top rod structure of the utility model;

[0027] Fig. 9 This is a schematic diagram of the tail cover structure of the utility model;

[0028] Fig.10 This is a schematic diagram of the end cover structure of the utility model;

[0029] Fig.11 This is a schematic diagram of the limit block structure of the utility model;

[0030] Fig.12 This is a schematic diagram of the propulsion shaft structure of the utility model;

[0031] Fig.13 This is a schematic diagram of the structure of the self-made screw of the utility model;

[0032] Fig.14 It is a schematic diagram of the specific structure of the utility model;

[0033] Fig.15 This is a schematic diagram of the angle block structure of the utility model. DETAILED DESCRIPTION

[0034] The following will explain how to implement the present invention in detail in conjunction with the structural diagram and parts structural diagram of the present invention.

[0035] The utility model provides a rotor blade tip measuring tool for an aircraft engine, wherein a gauge block is installed on one side directly above the measuring body, a left positioning block and a right positioning block are fixed to the upper groove part, and a side block for blocking the blade is installed between the left and right positioning blocks and the gauge blocks. There are horizontal and vertical hollow cylinders in the middle of the measuring body, and the top block and the top rod are connected together by a cylindrical pin to tighten the blade. There is a gap between the upper part of the top rod and the measuring body for placing a spring, and there is a groove on the left side with a limit screw to prevent the top rod from rotating. The up and down movement of the top rod depends on the upward force of the conversion part when the propulsion shaft below moves horizontally, and there is a transition structure limit block between the top rod and the propulsion shaft. The left and right movement of the propulsion shaft is controlled by the self-made screw on the right side. The tail cover and the end cover are fixed to the two sides of the measuring body with screws, and the self-made screws are screwed in the middle of the end cover. The angle of the blade tip is adjusted by the lowest angle block.

[0036] according to Figure 1 As shown in , install the whole set of measuring tools in the following order, with the measuring body 16 as the main body, and install the internal parts. First, connect the top block 6 and the top rod 11 together through the cylindrical pin 7. The extra parts of the cylindrical pin 7 at both ends should be as identical as possible, and the length should be able to fit into the hole on the upper side of the side body 16. Then, the spring 8 is sleeved on the upper half of the top rod 11. Finally, the limit block 12 is inserted into the semi-cylindrical hole reserved under the top rod 11, and the whole assembly is placed aside. Screw the homemade screw 14 into the thread of the end cover 15, and the small head of the homemade screw 14 matches the reserved square hole of the propulsion shaft 13. After the internal parts are assembled, turn over the measuring body 16, with the side with the tail cover 10 facing down, and insert the combined part of the top rod 11 horizontally into the interior of the measuring body 16, and the grooved part of the top rod 11 faces down and aligns with the reserved limit screw 9 hole. Continue to install the propulsion shaft 13, vertically place the propulsion shaft 13 as a whole into the measuring body 16, with the inclined surface of the propulsion shaft 13 facing the direction of the push rod 11, and fit with the inclined surface of the limit block 12, and fix the end cover 15 on the measuring body 16 with screws. After completion, return the measuring body 16 to the right side with the groove facing up. Tighten the limit screw 9 at one end of the left tail cover 10. During the tightening process, a certain gap should be kept between the end face of the limit screw 9 and the groove of the push rod 11 to ensure that the push rod 11 can slide freely. Finally, install the tail cover 10 and tighten it with screws.

[0037] After the internal structure of the measuring body 16 is installed, continue to install the part just above the measuring body 16. Since the measuring tool assembly accuracy requirements are high, it is necessary to add some assembly requirements during assembly. First, install the gauge block 1, fix it with screws and cylindrical pins, and the N surface of the gauge block 1 is flush with the N surface of the measuring body 16, and the P surface of the gauge block 1 is parallel to the M of the measuring body 16. Next, install the left positioning block 3 and the right positioning block 5, clamp the left and right positioning blocks in the slots on the measuring body 16, and fix them on the measuring body 16 with screws and cylindrical pins. The N surface of the right positioning block 5 is flush with the N surface of the measuring body 16, and the M surface of the left and right positioning blocks is flush with the M surface of the measuring body 16, and the assembly requirements between the left and right positioning blocks are determined according to the size of the blade tenon. Continue to install the side block 4, fix it with screws, and ensure that the M surface of the side block 4 is flush with the M surface of the left and right positioning blocks. Finally, the angle block 17 is fastened to the bottom surface of the measuring body 16 to level the two measuring surfaces of the gauge block 1, so as to facilitate the final micrometer dragging measurement. The Q surface of the angle block 17 is flush with the Q surface of the measuring body 16.

[0038] When the entire blade tip gauge is assembled as required, start assembling blade 2, then use three-coordinate measurement, compare the three-coordinate measurement data, and grind the two measuring surfaces of gauge block 1 to meet the drawing requirements. When measuring a specific blade, install the blade, drag the micrometer on the blade tip, and compare it with the two measuring surfaces of gauge block 1. If it is between the two values, the blade tip tolerance meets the drawing requirements and is qualified. Loosen the blade by turning the self-made screw 14, replace the next one and tighten it, and repeat the above operation.

[0039] Figure 1As shown in , install the whole set of measuring tools in the following order, with the measuring body 16 as the main body, and install the internal parts. First, connect the top block 6 and the top rod 11 together through the cylindrical pin 7. The extra parts of the cylindrical pin 7 at both ends should be as identical as possible, and the length should be able to fit into the hole on the upper side of the side body 16. Then, the spring 8 is sleeved on the upper half of the top rod 11. Finally, the limit block 12 is inserted into the semi-cylindrical hole reserved under the top rod 11, and the whole assembly is placed aside. Screw the homemade screw 14 into the thread of the end cover 15, and the small head of the homemade screw 14 matches the reserved square hole of the propulsion shaft 13. After the internal parts are assembled, turn over the measuring body 16, with the side with the tail cover 10 facing down, and insert the combined part of the top rod 11 horizontally into the interior of the measuring body 16, and the grooved part of the top rod 11 faces down and aligns with the reserved limit screw 9 hole. Continue to install the propulsion shaft 13, vertically place the propulsion shaft 13 as a whole into the measuring body 16, with the inclined surface of the propulsion shaft 13 facing the direction of the push rod 11, and fit with the inclined surface of the limit block 12, and fix the end cover 15 on the measuring body 16 with screws. After completion, return the measuring body 16 to the right side with the groove facing up. Tighten the limit screw 9 at one end of the left tail cover 10. During the tightening process, a certain gap should be kept between the end face of the limit screw 9 and the groove of the push rod 11 to ensure that the push rod 11 can slide freely. Finally, install the tail cover 10 and tighten it with screws.

[0040] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A rotor blade tip measuring tool for an aircraft engine, characterized in that: Including test The measuring support structure and angle block of the concrete and the upper part of the measuring body; the measuring support structure of the upper part of the measuring body consists of a gauge block, a left positioning block, a right positioning block and a side block; the measuring body structure includes a hollow cylinder, a top block, a push rod, a cylindrical pin, a spring, a limit block, a propulsion shaft, a tail cover, an end cover, a limit screw and a homemade screw; a gauge block leaning against the side of the blade is installed on the side directly above the measuring body, the left positioning block and the right positioning block form a groove to clamp the blade, and a side block to block the blade is provided at one end of the groove; the middle of the measuring body is a hollow cylinder that crosses each other horizontally and vertically, and the propulsion shaft and the push rod are installed in the horizontal and vertical spaces inside the hollow cylinder respectively, the push rod is on the inclined plane of the propulsion shaft surface, and the inclined push rod is in direct contact with the propulsion shaft; when the propulsion shaft moves horizontally, the push rod moves up and down.

2. The rotor blade tip measuring tool for an aircraft engine according to claim 1, characterized in that: The measuring surface of the gauge block is provided with two planes of different heights, one open and one closed, which are set according to the blade tip tolerance.

3. The rotor blade tip measuring tool for an aircraft engine according to claim 1, characterized in that: The upper end surface of the top block is designed to be two separate semicircular arc structures, and the blades are pressed through two line contacts.

4. The rotor blade tip measuring tool for an aircraft engine according to claim 1, characterized in that: A spring is placed in the gap between the push rod and the measuring body to rebound the push block when the blade is released.

5. The rotor blade tip measuring tool for an aircraft engine according to claim 1, characterized in that: There is a transition structure limit block between the push rod and the propulsion shaft. The semi-cylindrical shape is embedded in the push rod, and the inclined surface is in direct contact with the propulsion shaft.

6. The rotor blade tip measuring tool for an aircraft engine according to claim 1, characterized in that: The end cover is fixed on the measuring body and has a thread in the middle that cooperates with the screw.

7. The rotor blade tip measuring tool for an aircraft engine according to claim 1, characterized in that: The protruding part of the top of the self-made screw is combined with the inner groove part of the propulsion shaft to drive the propulsion shaft to move forward and backward.

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