A tool for measuring the thickness of a serrated tooth face coating

Abstract

A kind of measuring tool of serrated tooth surface coating thickness, including beam assembly, first measurement component is arranged at the left end of the beam assembly for detecting the coating thickness of the upper tooth surface of low pressure turbine baffle;Second measurement component is arranged at the right end of beam assembly for detecting the coating thickness of the lower tooth surface of low pressure turbine baffle;Positioning member is arranged on beam assembly for being inserted in the counterbore of low pressure turbine baffle and positioning;First measurement component includes first lever and first dial gauge;First lever can rotate around first pin shaft in the middle, and the right end of first lever is measurement end, and the left end top surface is in contact with the measuring head of first dial gauge;Second measurement component includes second lever and second dial gauge, and second lever can rotate around second pin shaft in the middle, and the left end of second lever is measurement end, and the right end top surface is in contact with the measuring head of second dial gauge.

Description

Technical Field

[0001] This invention relates to aero-engine manufacturing technology, and more particularly to a measuring tool for measuring the thickness of the coating on the tooth surface of a turbine baffle, used for detecting the coating thickness of the turbine baffle in an engine. Background Technology

[0002] Combination Figure 1 As shown, in an aero-engine, the low-pressure turbine baffle 100 is a rotating part, and its outer circumferential surface is provided with multiple rings of teeth 101. Each tooth 101 has an upper tooth surface 102, a lower tooth surface 103, and a tooth tip 104. A countersunk hole 105 is provided at the center of the top surface of the low-pressure turbine baffle 100 as a positioning hole. The angle between the upper tooth surface 101 and the horizontal direction is α, and the angle between the lower tooth surface 103 and the horizontal direction is β.

[0003] During the machining of the low-pressure turbine baffle 100, a protective layer needs to be applied to the grating teeth 101, such as... Figure 1 As shown, the coating thickness on the two tooth surfaces is often much thinner than that on the tooth tip 104, requiring the coating thickness on both tooth surfaces to be measured in order to adjust the spraying parameters for re-spraying. However, since the tooth tips 104 of two adjacent upper and lower grates 101 are about 3mm apart, the space between the grates 101 is small, making it difficult to measure the coating thickness on the tooth surfaces. Conventional calipers cannot meet the testing requirements. Summary of the Invention

[0004] The main objective of this invention is to provide a measuring tool for the coating thickness of a toothed tooth, which can measure the coating thickness of the toothed tooth, thereby solving the aforementioned technical problems.

[0005] To achieve the above objectives, the present invention proposes a measuring tool for measuring the coating thickness of a turbine tooth surface, comprising a crossbeam assembly. A first measuring component is provided at the left end of the crossbeam assembly for detecting the coating thickness of the upper tooth surface of a low-pressure turbine baffle. A second measuring component is provided at the right end of the crossbeam assembly for detecting the coating thickness of the lower tooth surface of the low-pressure turbine baffle. A positioning element is provided on the crossbeam assembly for positioning within a countersunk hole in the low-pressure turbine baffle. The first measuring component includes a first lever and a first dial indicator. The first lever is rotatable around a first pin in its middle portion, with the right end of the first lever being the measuring end and the top surface of its left end contacting the measuring head of the first dial indicator. The second measuring component includes a second lever and a second dial indicator. The second lever is rotatable around a second pin in its middle portion, with the left end of the second lever being the measuring end and the top surface of its right end contacting the measuring head of the second dial indicator.

[0006] Preferably, the crossbeam assembly includes a crossbar, a first support block disposed at the left end of the crossbar, and a second support block disposed at the right end of the crossbar; the first support block and the second support block are fixedly connected to the crossbar by cylindrical pins and rivets; the positioning component includes two first legs and two second legs; the two first legs are respectively mounted on the ear plates on the front and rear sides of the first support block; the two second legs are respectively mounted on the ear plates on the front and rear sides of the second support block; the lower end faces of the two first legs and the two second legs are on the same plane, used to support on the horizontal platform surface of the counterbore of the low-pressure turbine baffle; during positioning, the outer cylindrical surfaces of the two first legs are set as positioning surfaces to abut against the inner wall of the counterbore, and the outer cylindrical surfaces of the two second legs are spaced apart from the inner wall of the counterbore.

[0007] Preferably, the first measuring component further includes a first guide block and a first dial indicator holder. The right end of the first guide block is configured as a horizontal arm and fixedly connected to the beam assembly. An inclined first rectangular hole is provided at the left end of the first guide block. The angle between the axis of the first rectangular hole and the horizontal direction is equal to the angle α between the upper tooth surface of the low-pressure turbine baffle and the horizontal direction. The first dial indicator holder is inserted into the first rectangular hole. A first through groove is provided inside the lower end of the first dial indicator holder. The first lever is installed in the first through groove. The two ends of the first pin are rotatably inserted into the front and rear side walls of the first through groove. The measuring head of the first dial indicator is inserted into the hole on the left side of the first dial indicator holder and is tightened by a first tightening screw screwed onto the left end face of the first dial indicator holder. A first spring is provided inside the first dial indicator holder. The first spring is in a compressed state and is located on the right side of the first pin, with its lower end abutting against the top surface of the measuring end of the first lever.

[0008] Preferably, the first measuring component further includes a first top plate, which is located between the lower end face of the first gauge holder and the bottom face of the first rectangular hole; a stepped countersunk hole is provided on the bottom of the first rectangular hole and a first screw is installed thereon, the stud end of the first screw is connected to the first top plate, and there is a gap between the top face of the first screw head and the stepped countersunk hole, so that the first top plate forms a floating structure; a second tightening screw is screwed on the bottom wall of the first rectangular hole to tighten the first top plate, thereby pushing the first gauge holder against the top face of the first rectangular hole.

[0009] Preferably, a first stop pin is inserted into the first table frame, the first stop pin is located on the left side of the first pin shaft, and the lower end of the first stop pin is used to abut against the top surface of the left end of the first lever; a first clearance groove is provided on the top surface of the first rectangular hole; the top end of the first stop pin is located in the first clearance groove.

[0010] Preferably, a first boss is integrally formed on the front and rear sides of the left end of the first watch frame, and the stepped surface of the first boss abuts against the left end face A of the first guide block.

[0011] Preferably, the second measuring component further includes a second guide block and a second gauge holder. The left end of the second guide block is configured as a horizontal arm and fixedly connected to the beam assembly. An inclined second rectangular hole is provided at the right end of the second guide block. The angle between the axis of the second rectangular hole and the horizontal direction is equal to the angle β between the lower tooth surface of the low-pressure turbine baffle and the horizontal direction. The second gauge holder is inserted into the second rectangular hole. A second through groove is provided inside the lower end of the second gauge holder. The second lever is installed in the second through groove. The two ends of the second pin are rotatably inserted into the front and rear side walls of the second through groove. The measuring head of the second dial indicator is inserted into the hole on the right and left sides of the second gauge holder and is tightened by a third tightening screw screwed onto the right end face of the second gauge holder (11). A second spring is provided inside the second gauge holder. The second spring is in a compressed state and is located on the right side of the second pin, with its lower end abutting against the top surface of the right end of the second lever.

[0012] Preferably, the second measuring component further includes a second top plate located between the lower end face of the second gauge holder and the bottom face of the second rectangular hole; a stepped countersunk hole is provided on the bottom of the second rectangular hole and a second screw is installed thereon, the stud end of the second screw is connected to the second top plate, and there is a gap between the top face of the second screw head and the stepped countersunk hole, so that the second top plate forms a floating structure; a fourth tightening screw is screwed on the bottom wall of the second rectangular hole to tighten the second top plate, thereby pushing the second gauge holder against the top face of the second rectangular hole.

[0013] Preferably, a second stop pin is inserted into the second frame, the second stop pin is located on the left side of the second pin shaft, and the lower end of the second stop pin is used to abut against the top surface of the left end of the second lever; a second clearance groove is provided on the top surface of the second rectangular hole; the top end of the second stop pin is located in the second clearance groove.

[0014] Preferably, a second boss is integrally formed on the front and rear sides of the right end of the second table frame, and the stepped surface of the second boss abuts against the right end face B of the second guide block.

[0015] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0016] (1) By using the measuring tool provided by this invention, the positioning element on the crossbeam assembly is inserted into the countersunk hole of the low-pressure turbine baffle for positioning, and the entire measuring tool can be positioned on the low-pressure turbine baffle part to be tested. The coating thickness is measured by comparison. Specifically, before spraying, the upper tooth surface of the low-pressure turbine baffle is first detected by the first measuring component at the left end of the measuring tool, and the reading of the first dial indicator is recorded. The lower tooth surface of the low-pressure turbine baffle is detected by the second measuring component at the right end of the measuring tool, and the reading of the second dial indicator is recorded. After spraying, the upper tooth surface of the low-pressure turbine baffle is detected by the first measuring component at the left end, and the reading of the first dial indicator is recorded. The lower tooth surface of the low-pressure turbine baffle is detected by the second measuring component at the right end, and the reading of the second dial indicator is recorded. The difference in readings before and after spraying reflects the coating thickness.

[0017] (2) The measuring tool provided by this method provides a feasible way to measure the coating thickness on site, which facilitates the spraying process and ensures the coating thickness. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a low-pressure turbine baffle component in an aero-engine;

[0020] Figure 2 This is a front sectional view of the measuring instrument provided by the present invention;

[0021] Figure 3 A top view of the measuring instrument provided by the present invention;

[0022] Figure 4 This is a cross-sectional view of the first guide block in this invention;

[0023] Figure 5 for Figure 4 C-direction view;

[0024] Figure 6 This is a top view of the first guide block in this invention;

[0025] Figure 7 This is a cross-sectional view of the second guide block in this invention;

[0026] Figure 8 for Figure 7 View from D direction;

[0027] Figure 9 This is a top view of the second guide block in this invention;

[0028] Figure 10 This is a three-dimensional structural diagram of the first watch holder in this invention;

[0029] Figure 11 This is a cross-sectional view of the first watch frame in this invention;

[0030] Figure 12 This is a schematic diagram of the assembly of some components of the first measuring component in this invention;

[0031] Figure 13 This is a three-dimensional structural diagram of the second watch holder in this invention;

[0032] Figure 14 This is a cross-sectional view of the second table frame in this invention;

[0033] Figure 15 This is a schematic diagram of the assembly of some components of the second measuring component in this invention.

[0034] Reference numerals: 1. Crossbeam assembly; 1a. Crossbar; 2. First support leg; 3a. First support block; 3b. Second support block; 4. First guide block; 4a. First rectangular hole; 4b. First clearance groove; 5. First gauge holder; 5a. First through groove; 5b. First tightening screw; 5c. First stop pin; 5d. First boss; 6. First lever; 7. First top plate; 7a. First screw; 7b. Second tightening screw; 8. Second support leg; 9. Second guide block; 9a. Second rectangular hole; 9b. Second clearance groove; 10. Second lever; 11. Second gauge holder; 11a. Second through groove; 11b. Third tightening screw; 11c. Second stop pin 11d, second boss; 12, first bushing; 13, second bushing; 14, second adjusting screw; 15, second spring; 16, first adjusting screw; 17, second shaft pin; 18, screw; 19, hex nut; 20, flat washer; 21, socket head cap screw; 22, cylindrical pin; 23, rivet; 24, first dial indicator; 25, second dial indicator; 26, first pin shaft; 27, first spring; 28, second top plate; 28a, second screw; 28b, fourth tightening screw; 100, low-pressure turbine baffle; 101, grating teeth; 102, upper tooth surface; 103, lower tooth surface; 104, tooth tip; 105, countersunk hole. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0036] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0037] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0038] Combination Figures 2 to 15 The image shows a specific embodiment of the measuring tool for measuring the coating thickness of the tooth surface of the turbine baffle 100 provided by the present invention. The measuring tool includes a crossbeam assembly 1. A first measuring component is provided at the left end of the crossbeam assembly 1 for detecting the coating thickness of the upper tooth surface 102 of the low-pressure turbine baffle 100. A second measuring component is provided at the right end of the crossbeam assembly 1 for detecting the coating thickness of the lower tooth surface 103 of the low-pressure turbine baffle 100. A positioning component is provided on the crossbeam assembly 1 for positioning by inserting into the countersunk hole 105 of the low-pressure turbine baffle 100.

[0039] Combination Figure 2 As shown, the first measuring component includes a first lever 6 and a first dial indicator 24; the first lever 6 is rotatable about a first pin 26 in its middle part, the right end of the first lever 6 is the measuring end, and the top surface of the left end contacts the measuring head of the first dial indicator 24; the second measuring component includes a second lever 10 and a second dial indicator 25, the second lever 10 is rotatable about a second pin 17 in its middle part, the left end of the second lever 10 is the measuring end, and the top surface of the right end contacts the measuring head of the second dial indicator 25.

[0040] Using the above structure, the positioning element on the crossbeam assembly 1 engages with the countersunk hole 105 of the low-pressure turbine baffle 100 to position the entire measuring tool on the part. The coating thickness is measured using a comparative method. Specifically, before coating, the first measuring component on the left end of the measuring tool is used to measure the upper tooth surface 102 of the low-pressure turbine baffle 100, and the reading of the first dial indicator 24 is recorded. Similarly, the second measuring component on the right end of the measuring tool is used to measure the lower tooth surface 103 of the low-pressure turbine baffle 100, and the reading of the second dial indicator 25 is recorded. Likewise, after coating, the first measuring component on the left end is used to measure the upper tooth surface 102 of the low-pressure turbine baffle 100, and the reading of the first dial indicator 24 is recorded. The second measuring component on the right end is used to measure the lower tooth surface 103 of the low-pressure turbine baffle 100, and the reading of the second dial indicator 25 is recorded. The difference in readings before and after coating reflects the coating thickness of the upper tooth surface 102 and the lower tooth surface 103, respectively.

[0041] Combination Figure 2 , Figure 3 As shown, the crossbeam assembly 1 includes a crossbar 1a, a first support block 3a disposed at the left end of the crossbar 1a, and a second support block 3b disposed at the right end of the crossbar 1a; the first support block 3a and the second support block 3b are both fixedly connected to the crossbar 1a by cylindrical pins 22 and rivets 23.

[0042] Because the entire crossbeam assembly 1 is quite long, to facilitate processing and connection of the first and second measuring components at both ends, the crossbeam assembly 1 adopts a split structure consisting of a crossbar 1a and first and second support blocks 3a and 3b. The crossbar 1a is made of hollow square steel, which is readily available. The purpose of setting the first and second support blocks 3a and 3b is to connect to the first and second measuring components respectively, and to install the positioning components. In this embodiment, the positioning component includes two first legs 2 and two second legs 8; the two first legs 2 are respectively installed on the ear plates on the front and rear sides of the first support block 3a; the two second legs 8 are respectively installed on the ear plates on the front and rear sides of the second support block 3b. The lower end faces of the two first legs 2 and the two second legs 8 are on the same plane and are used to support the horizontal platform surface of the countersunk hole 105 of the low-pressure turbine baffle 100; during positioning, the outer cylindrical surfaces of the two first legs 2 are set as positioning surfaces to abut against the inner wall of the countersunk hole 105, and the outer cylindrical surfaces of the two second legs 8 are spaced apart from the inner wall of the countersunk hole 105.

[0043] During positioning, both first legs 2 and both second legs 8 are inserted into the countersunk holes 105 of the low-pressure turbine baffle 100, with the lower end faces of the first legs 2 and the second legs 8 abutting against the horizontal platform surface of the countersunk hole 105. Since the two first legs 2 are spaced apart and symmetrically distributed on both sides of the longitudinal central symmetry plane of the beam assembly 1, during positioning, only the outer cylindrical surfaces of the two first legs 2 need to abut against the inner wall of the countersunk hole 105. To prevent over-positioning, the outer cylindrical surfaces of the two second legs 8 are spaced apart from the inner wall of the countersunk hole 105.

[0044] Combination Figures 2 to 6 ,as well as Figures 10 to 12 As shown, the first measuring assembly also includes a first guide block 4 and a first gauge holder 5. The right end of the first guide block 4 is configured as a horizontal arm and is fixedly connected to the crossbeam assembly 1. Specifically, the horizontal arm is fixedly connected to the first support block 3a by an internal hexagonal head screw 21 and a locating pin. An inclined first rectangular hole 4a is provided at the left end of the first guide block 4. The angle between the axis of the first rectangular hole 4a and the horizontal direction is equal to the angle α between the upper tooth surface 102 in the low-pressure turbine baffle 100 and the horizontal direction. The first gauge holder 5 is inserted into the first rectangular hole 4a. A first through groove 5a is provided inside the lower end of the first gauge holder 5. The first lever 6 is installed in the first through groove 5a. The two ends of the first pin 26 are rotatably inserted into the front and rear side walls of the first through groove 5a. The measuring head of the first dial indicator 24 is inserted into the hole on the left side of the first gauge holder 5. A first bushing 12 is provided between the measuring head of the first dial indicator 24 and the mounting hole of the first gauge holder 5. The first dial indicator 24 is tightened by the first tightening screw 5b screwed onto the left end face of the first indicator frame 5. A first spring 27 is installed inside the first indicator frame 5. The first spring 27 is in a compressed state and is located to the right of the first pin 26, with its lower end abutting against the top surface of the measuring end of the first lever 6. Since the inclination angle of the first rectangular hole 4a is equal to α, when the first lever 6 is in its initial state, as long as the upper or lower end face of the first lever 6 is parallel to the top surface of the first indicator frame 5, the inclination angle of the first lever 6 will also be equal to α. Furthermore, by providing the first spring 27, during testing, the elastic force of the first spring 27 always acts on the first lever 6, giving the first lever 6 a tendency to rotate clockwise around the first pin 26. Therefore, the right end of the first lever 6 (i.e., the measuring end of the first lever 6) can always be in contact with the upper tooth surface 102 of the low-pressure turbine baffle 100, improving the stability of the measurement.

[0045] Furthermore, the first measuring component also includes a first top plate 7, which is located between the lower end face of the first gauge holder 5 and the bottom surface of the first rectangular hole 4a; a stepped countersunk hole is provided on the bottom of the first rectangular hole 4a and a first screw 7a is installed thereon, the stud end of the first screw 7a is connected to the first top plate 7, and there is a gap between the top surface of the screw head of the first screw 7a and the stepped countersunk hole (e.g., Figure 4 As shown), the first top plate 7 forms a floating structure; a second tightening screw 7b is screwed onto the bottom wall of the first rectangular hole 4a to tighten the first top plate 7, thereby pushing the first watch holder 5 against the top surface of the first rectangular hole 4a.

[0046] Combination Figure 2 , Figure 12 As shown, a first stop pin 5c is inserted into the first holder 5. The first stop pin 5c is located on the left side of the first pin 26, and the lower end of the first stop pin 5c is used to abut against the top surface of the left end of the first lever 6. The purpose of setting the first stop pin 5c is to adjust the initial position of the first lever 6. Since the elastic force of the first spring 27 always pushes the first lever 6 downward, the first lever 6 has a tendency to rotate clockwise. By adjusting the insertion depth of the first stop pin 5c, the tilt angle of the first lever 6 can be adjusted.

[0047] Furthermore, combined Figure 4 , Figure 5 As shown, in order to avoid interference between the top of the first stop pin 5c and the top surface of the first rectangular hole 4a, a first clearance groove 4b is provided on the top surface of the first rectangular hole 4a; the top of the first stop pin 5c is located in the first clearance groove 4b, and the first clearance groove 4b provides clearance.

[0048] In addition, combined Figure 12 As shown, in order to adjust the force of the first spring 27, a first adjusting screw 16 is provided on the first gauge 5. By rotating the screw 16, the compression of the first spring 27 can be adjusted, thereby adjusting the force of the first spring 27.

[0049] Combination Figure 4 , Figure 10 as well as Figure 1 As shown, a first boss 5d is integrally formed on the front and rear sides of the left end of the first gauge holder 5. The stepped surface of the first boss 5d abuts against the left end face A of the first guide block 4. The first boss 5d can form a limiting function, restricting the depth of the first gauge holder 5 inserted into the first rectangular hole 4a, thereby achieving the purpose of controlling the position of the measuring end of the first lever 6.

[0050] Combination Figure 2 , Figures 7 to 9 , Figures 13 to 15As shown, the second measuring assembly also includes a second guide block 9 and a second gauge holder 11. The left end of the second guide block 9 is configured as a horizontal arm and is fixedly connected to the crossbeam assembly 1. Specifically, the horizontal arm is fixedly connected to the second support block 3b by an internal hexagon head screw 21 and a locating pin. An inclined second rectangular hole 9a is provided at the right end of the second guide block 9. The angle between the axis of the second rectangular hole 9a and the horizontal direction is equal to the angle β between the lower tooth surface 103 in the low-pressure turbine baffle 100 and the horizontal direction. The second gauge holder 11 is inserted into the second rectangular hole 9a. A second through groove 11a is provided inside the lower end of the second gauge holder 11. The second lever 10 is installed in the second through groove 11a. The two ends of the second pin shaft 17 are rotatably inserted into the front and rear side walls of the second through groove 11a. The measuring head of the second dial indicator 25 is inserted into the hole on the right and left sides of the second gauge holder 11. A second bushing 13 is provided between the measuring head of the second dial indicator 25 and the mounting hole of the second gauge holder 11. The second dial indicator 25 is secured by a third tightening screw 11b screwed onto the right end face of the second indicator holder 11. A second spring 15 is installed inside the second indicator holder 11. The second spring 15 is in a compressed state and is located to the right of the second pin 17, with its lower end abutting against the top surface of the right end of the second lever 10. Since the inclination angle of the second rectangular hole 9a is equal to β, when the second lever 20 is in its initial state, as long as the upper or lower end face of the second lever 10 is parallel to the top surface of the second indicator holder 11, the inclination angle of the second lever 10 will also be equal to β. In addition, by providing the second spring 15, during the test, the elastic force of the second spring 15 always acts on the second lever 10, giving the second lever 10 a tendency to rotate clockwise around the second pin 17. Therefore, the left end of the second lever 10 (i.e., the measuring end of the second lever 10) can always be in contact with the lower tooth surface 103 of the low-pressure turbine baffle 100, improving the stability of the measurement.

[0051] Furthermore, the second measuring component also includes a second top plate 28, which is located between the lower end face of the second gauge holder 11 and the bottom surface of the second rectangular hole 9a; a stepped countersunk hole is provided on the bottom of the second rectangular hole 9a and a second screw 28a is installed thereon, the stud end of the second screw 28a is connected to the second top plate 28, and there is a gap between the top surface of the screw head of the second screw 28a and the stepped countersunk hole (e.g., Figure 7 As shown), the second top plate 28 forms a floating structure; a fourth tightening screw 28b is screwed onto the bottom wall of the second rectangular hole 9a to tighten the second top plate 28, thereby pushing the second watch holder 11 against the top surface of the second rectangular hole 9a.

[0052] Combination Figure 2 , Figure 15As shown, a second stop pin 11c is inserted into the second holder 11. The second stop pin 11c is located on the left side of the second pin 17, and the lower end of the second stop pin 11c is used to abut against the top surface of the left end of the second lever 10. The purpose of setting the second stop pin 11c is to adjust the initial position of the second lever 10. Since the elastic force of the second spring 15 always pushes the second lever 10 downward, the second lever 10 has a tendency to rotate clockwise. By adjusting the insertion depth of the second stop pin 11c, the tilt angle of the second lever 10 can be adjusted.

[0053] Furthermore, combined Figure 7 , Figure 8 As shown, in order to avoid interference between the top end of the second stop pin 11c and the top surface of the second rectangular hole 9a, a second clearance groove 9b is provided on the top surface of the second rectangular hole 9a; the top end of the second stop pin 11c is located in the second clearance groove 9b, and the second clearance groove 9b forms a clearance function.

[0054] In addition, combined Figure 15 As shown, in order to adjust the force of the second spring 15, a second adjusting screw 14 is provided on the second gauge 11. By rotating the screw 14, the compression of the second spring 15 can be adjusted, thereby adjusting the force of the second spring 15.

[0055] Combination Figure 7 , Figure 13 as well as Figure 1 As shown, a second boss 11d is integrally formed on the front and rear sides of the right end of the second gauge holder 11. The stepped surface of the second boss 11d abuts against the right end face B of the second guide block 9. The second boss 11d can form a limiting function, restricting the depth of the second gauge holder 11 inserted into the second rectangular hole 9a, thereby achieving the purpose of controlling the position of the measuring end of the second lever 10.

[0056] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A measuring tool for the thickness of the coating on the tooth surface of a toothed sieve, characterized in that, The system includes a crossbeam assembly (1), on the left end of which a first measuring component is provided for detecting the coating thickness of the upper tooth surface (102) of the low-pressure turbine baffle (100); on the right end of which a second measuring component is provided for detecting the coating thickness of the lower tooth surface (103) of the low-pressure turbine baffle (100); and on the crossbeam assembly (1) a positioning component is provided for being inserted into the countersunk hole (105) of the low-pressure turbine baffle (100) for positioning. The first measuring component includes a first lever (6) and a first dial indicator (24); the first lever (6) can rotate around the first pin (26) in its middle part, the right end of the first lever (6) is the measuring end, and the top surface of the left end is in contact with the measuring head of the first dial indicator (24); The second measuring component includes a second lever (10) and a second dial indicator (25). The second lever (10) can rotate around the second pin (17) in its middle part. The left end of the second lever (10) is the measuring end, and the top surface of the right end contacts the measuring head of the second dial indicator (25). The crossbeam assembly (1) includes a crossbar (1a), a first support block (3a) disposed at the left end of the crossbar (1a), and a second support block (3b) disposed at the right end of the crossbar (1a); the first support block (3a) and the second support block (3b) are both fixedly connected to the crossbar (1a) by cylindrical pins (22) and rivets (23); The positioning component includes two first legs (2) and two second legs (8); the two first legs (2) are respectively installed on the ear plates on the front and rear sides of the first support block (3a); the two second legs (8) are respectively installed on the ear plates on the front and rear sides of the second support block (3b); The lower ends of the two first legs (2) and the two second legs (8) are on the same plane and are used to support the horizontal platform of the countersunk hole (105) of the low-pressure turbine baffle (100); during positioning, the outer cylindrical surfaces of the two first legs (2) are set as positioning surfaces to abut against the inner wall of the countersunk hole (105), and the outer cylindrical surfaces of the two second legs (8) are spaced apart from the inner wall of the countersunk hole (105); The first measuring assembly further includes a first guide block (4) and a first gauge holder (5). The right end of the first guide block (4) is configured as a horizontal arm and fixedly connected to the beam assembly (1). An inclined first rectangular hole (4a) is provided at the left end of the first guide block (4). The angle between the axis of the first rectangular hole (4a) and the horizontal direction is equal to the angle α between the upper tooth surface (102) in the low-pressure turbine baffle (100) and the horizontal direction. The first gauge holder (5) is inserted into the first rectangular hole (4a). A first through groove (5a) is provided inside the lower end of the first gauge holder (5). The rod (6) is installed in the first through groove (5a), and the two ends of the first pin (26) are rotatably inserted into the front and rear side walls of the first through groove (5a); the measuring head of the first dial indicator (24) is inserted into the hole on the left side of the first indicator frame (5) and is tightened by the first tightening screw (5b) screwed into the left end face of the first indicator frame (5); a first spring (27) is provided in the first indicator frame (5), the first spring (27) is in a compressed state, and the first spring (27) is located on the right side of the first pin (26), with its lower end abutting against the top surface of the measuring end of the first lever (6); The second measuring assembly also includes a second guide block (9) and a second gauge holder (11). The left end of the second guide block (9) is configured as a horizontal arm and fixedly connected to the beam assembly (1). An inclined second rectangular hole (9a) is provided at the right end of the second guide block (9). The angle between the axis of the second rectangular hole (9a) and the horizontal direction is equal to the angle β between the lower tooth surface (103) of the low-pressure turbine baffle (100) and the horizontal direction. The second gauge holder (11) is inserted into the second rectangular hole (9a). A second through groove (11a) is provided inside the lower end of the second gauge holder (11). The second lever ( 10) Installed in the second through groove (11a), the two ends of the second pin (17) are rotatably inserted into the front and rear side walls of the second through groove (11a); the measuring head of the second dial indicator (25) is inserted into the hole on the right and left sides of the second indicator frame (11) and is tightened by the third tightening screw (11b) screwed into the right end face of the second indicator frame (11); a second spring (15) is provided in the second indicator frame (11), the second spring (15) is in a compressed state, and the second spring (15) is located on the right side of the second pin (17), with its lower end abutting against the top surface of the right end of the second lever (10); The second measuring component also includes a second top plate (28), which is located between the lower end face of the second meter holder (11) and the bottom face of the second rectangular hole (9a); a stepped countersunk hole is provided on the bottom of the second rectangular hole (9a) and a second screw (28a) is installed thereon, the stud end of the second screw (28a) is connected to the second top plate (28), and there is a gap between the top face of the screw head of the second screw (28a) and the stepped countersunk hole, so that the second top plate (28) forms a floating structure; a fourth tightening screw (28b) is screwed on the bottom wall of the second rectangular hole (9a) to tighten the second top plate (28), thereby pushing the second meter holder (11) to press against the top face of the second rectangular hole (9a).

2. The measuring tool for measuring the coating thickness of a tooth surface as described in claim 1, characterized in that, The first measuring component also includes a first top plate (7), which is located between the lower end face of the first meter holder (5) and the bottom face of the first rectangular hole (4a); a stepped countersunk hole is provided on the bottom of the first rectangular hole (4a) and a first screw (7a) is installed thereon, the stud end of the first screw (7a) is connected to the first top plate (7), and there is a gap between the top face of the screw head of the first screw (7a) and the stepped countersunk hole, so that the first top plate (7) forms a floating structure; a second tightening screw (7b) is screwed on the bottom wall of the first rectangular hole (4a) to tighten the first top plate (7), thereby pushing the first meter holder (5) to press against the top face of the first rectangular hole (4a).

3. The measuring tool for measuring the coating thickness of a tooth surface as described in claim 1, characterized in that, A first stop pin (5c) is inserted on the first frame (5). The first stop pin (5c) is located on the left side of the first pin (26), and the lower end of the first stop pin (5c) is used to abut against the top surface of the left end of the first lever (6). A first clearance groove (4b) is provided on the top surface of the first rectangular hole (4a). The top end of the first stop pin (5c) is located in the first clearance groove (4b).

4. The measuring tool for measuring the coating thickness of a tooth surface as described in claim 1, characterized in that, A first boss (5d) is integrally formed on the front and rear sides of the left end of the first table frame (5), and the stepped surface of the first boss (5d) abuts against the left end face A of the first guide block (4).

5. The measuring tool for measuring the coating thickness of a tooth surface as described in claim 1, characterized in that, A second stop pin (11c) is inserted on the second table frame (11). The second stop pin (11c) is located on the left side of the second pin (17), and the lower end of the second stop pin (11c) is used to abut against the top surface of the left end of the second lever (10). A second clearance groove (9b) is provided on the top surface of the second rectangular hole (9a). The top end of the second stop pin (11c) is located in the second clearance groove (9b).

6. The measuring tool for measuring the coating thickness of a tooth surface as described in claim 1, characterized in that, A second boss (11d) is integrally formed on the front and rear sides of the right end of the second table frame (11), and the stepped surface of the second boss (11d) abuts against the right end face B of the second guide block (9).

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