Axial flow compressor stationary blade crank detection tool

Abstract

The utility model discloses a detection tool for a stationary blade crank of an axial flow compressor, belongs to the technical field of crank detection equipment, and solves the problems of low detection efficiency and large detection error of an existing crank detection mode. The device specifically comprises a detection substrate, wherein the detection substrate is connected with an angle flat shaft and a step pin shaft; the angle flat shaft is connected with an angle hole of the crank, and the step pin shaft is connected with a reamed hole of the crank. According to the utility model, during detection, the angle hole of the detected crank is fixed on the angle flat shaft, and the reamed hole of the crank is fixed on the step pin shaft, so that whether the angle and the center distance of the crank are qualified or not can be quickly judged; the method for detecting the crank is efficient, time-saving, reliable in detection result and suitable for detecting cranks produced in batches.

Description

Technical Field

[0001] The utility model relates to the technical field of crank detection equipment, in particular to a tool for detecting a crank of a stationary blade of an axial flow compressor. Background Art

[0002] An axial flow compressor is a speed-type turbine compressor that relies on blades to work on the gas to increase its speed to obtain kinetic energy, and then converts the kinetic energy into pressure energy. The axial flow compressor accelerates the gas through the internal rotating blades and stationary blades to increase its speed, and then converts the kinetic energy into pressure energy through structural components such as diffusers, thereby achieving the purpose of compressing the gas. The angle of the stationary blades directly determines the size of the outlet pressure and outlet flow. The angle of the stationary blades is adjusted by the crank connection adjustment mechanism. The angle of each level of the stationary blades is adjusted by the crank to meet different working conditions. The angle mounting hole on the crank connected to the stationary blade directly determines the angle position of the stationary blade in the working state. The correctness of the crank angle directly affects the gas outlet pressure and flow, so the angle detection of the blade mounting hole on the crank is very important. There are hundreds of cranks for an axial flow compressor, and its detection is a labor-intensive task.

[0003] The detection method of the crank angle hole in the prior art is: on the detection platform, with one side of the crank as the reference, place an angle pad, adjust the straight edge of the angle hole on the crank to a horizontal position, and push the change of the needle of the dial indicator within the straight edge range of the angle hole to determine whether it is qualified; using a dial indicator to detect the angle hole is inefficient and requires a lot of work. The detection method of the crank center distance is: directly detect the edge size of the angle hole and the reamed hole by converting it into the center distance, but because the angle hole and the reamed hole on the crank are no longer on the same horizontal plane, the vernier caliper directly measures the angle, which is easy to cause errors. For this reason, the utility model patent applied for discloses a detection tool for the crank angle hole and center distance of an axial compressor. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides an axial compressor stator crank detection tool, which solves the problems of low detection efficiency and large detection error in the existing crank detection method.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A tool for detecting a stator crank of an axial compressor comprises a detection base plate, on which an angle flat shaft and a step pin are connected; the angle flat shaft is connected to an angle hole of the crank, and the step pin is connected to a reamed hole of the crank.

[0007] In this solution, during testing, the angle hole of the crank to be tested is fixed on the angle flat shaft, and the hinged hole of the crank is fixed on the step pin shaft, so that it can be quickly determined whether the angle and center distance of the crank are qualified; testing the crank in this way is efficient and time-saving, the test results are reliable, and it is suitable for crank testing in mass production.

[0008] Furthermore, a flat shaft mounting hole and a pin shaft mounting hole are provided on the detection substrate; the angle flat shaft and the step pin shaft are respectively mounted in the flat shaft mounting hole and the pin shaft mounting hole.

[0009] In this solution, when installing the angle flat shaft and the step pin shaft, they can be directly inserted into the flat shaft mounting hole and the pin shaft mounting hole respectively, which is convenient for installation; when testing cranks with different angles, different angle flat shafts can be quickly replaced; when testing cranks with different center distances, pin shaft mounting holes with corresponding center distances can be directly opened on the detection substrate, and then they can be tested, which is low-cost.

[0010] Furthermore, the small end of the angle flat shaft is provided with an anti-rotation flat shaft connected to the flat shaft mounting hole, and the large end of the angle flat shaft is provided with an angle detection flat shaft connected to the angle hole.

[0011] In this scheme, an anti-rotation flat shaft is designed to prevent the angle flat shaft from rotating; the angle detection flat shaft is used to be inserted into the angle hole to detect whether the angle hole is qualified; the design of the large end of the angle flat shaft can use the large end step end face to position the angle flat shaft.

[0012] Furthermore, the flat shaft mounting hole and the angle hole are both rounded rectangular structures; the deflection angles of the center lines of the two rounded rectangular structures and the center line of the detection substrate are equal.

[0013] In this solution, the flat shaft mounting hole is designed as a rounded rectangular structure with the same angle hole, which can effectively prevent the angle flat shaft from rotating during installation or detection, reducing the installation error of the angle flat shaft; it can also ensure that the angle flat shaft can be quickly inserted into the angle hole of the crank during detection.

[0014] Furthermore, the bottom end of the step pin is provided with a pin connected to the pin mounting hole, the top end of the step pin is provided with a pin connected to the reaming hole, and the middle section of the step pin is a step that limits the curved end surface of the crank.

[0015] In this scheme, the step pin can use the middle stage to position the curved end face of the crank, and after positioning, the height difference between the curved end face of the crank and the other end face can be detected; if the bottom of the curved end face of the crank is close to the top of the stage, the height difference of the curved end face of the crank is qualified.

[0016] Furthermore, a clearance groove is provided at the contact surface position between the angle flat shaft and the step pin shaft and the detection substrate.

[0017] In this solution, an avoidance groove is designed to avoid assembly interference between the angle flat shaft and the step pin shaft and the detection substrate, thereby improving the reliability of the tooling.

[0018] The beneficial effects of the utility model are:

[0019] When the inspection tool provided by the utility model inspects the crank, the angle hole at one end of the crank is connected to the angle flat shaft. If the hinged hole at the other end of the crank can be installed within the adjustable range of the step pin shaft, the hole angle and center distance of the crank are judged to be qualified. This inspection method reduces the cumbersome process of measuring the angle of each crank in mass production, shortens the inspection time, improves the inspection efficiency, is practical and reliable, and saves time and effort. When inspecting cranks of different angles, angle flat shafts of different angles can be replaced to inspect cranks of different angles; when inspecting cranks of different center distances, pin shaft mounting holes with different center distances can be made on the inspection substrate; the inspection of cranks of different angles and different center distances can be realized, and the inspection cost is low; when using the tool for inspection, it is no longer necessary to inspect based on the side of the crank, which can reduce the processing of the side of the crank during the production process and reduce the processing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a tooling for detecting the crank of a stator blade of an axial compressor according to the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the detection substrate of the utility model;

[0022] Figure 3 This is a schematic diagram of the angle flat shaft structure of the utility model;

[0023] Figure 4 This is a schematic diagram of the step pin structure of the utility model;

[0024] Figure 5 This is a schematic diagram of the horizontal cross-section structure of the crank detection tooling of the utility model;

[0025] Figure 6 It is a schematic diagram of the vertical cross-section structure of the crank detection tooling of the utility model.

[0026] Reference numerals:

[0027] 1. Detection substrate; 11. Flat shaft mounting hole; 12. Pin shaft mounting hole; 2. Angle flat shaft; 21. Anti-rotation flat shaft; 22. Angle detection flat shaft; 3. Step pin shaft; 31. Pin shaft; 32. Stage; 4. Crank; 41. Angle hole; 42. Reaming hole; DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments. The specific implementation of the utility model is described below to facilitate the understanding of the utility model by those skilled in the art, but it should be clear that the utility model is not limited to the scope of the specific implementation. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the utility model defined and determined by the attached claims, these changes are obvious, and all inventions and creations conceived using the utility model are protected.

[0029] like Figure 1 As shown, this embodiment provides an axial compressor stator crank detection tool for quickly and accurately detecting the center distance and angle of the crank; when the detection tool detects the crank, the crank can be installed on it to determine whether the crank is qualified, without the need for meter measurement, which simplifies the detection steps and improves the detection efficiency; it specifically includes:

[0030] Detecting substrate 1, angle flat shaft 2 and step pin shaft 3;

[0031] Among them, the detection substrate 1 is connected with an angle flat shaft 2 and a step pin shaft 3; during detection, the angle flat shaft 2 is connected to the angle hole 41 of the crank 4 to be detected, and the step pin shaft 3 is connected to the hinged hole 42 of the crank 4 to be detected, so as to quickly determine whether the angle and center distance of the crank 4 are qualified.

[0032] like Figure 2 As shown, a flat shaft mounting hole 11 and a pin shaft mounting hole 12 are provided on the detection substrate 1; the angle flat shaft 2 and the step pin shaft 3 are respectively installed in the flat shaft mounting hole 11 and the pin shaft mounting hole 12; when testing cranks 4 with different angles, the flat shafts 2 with different angles can be quickly replaced; when testing cranks 4 with different center distances, the pin shaft mounting holes 12 with the corresponding center distances can be directly opened on the detection substrate 1, and then they can be tested, and the detection cost is low.

[0033] like Figure 3 As shown, the small end of the angle flat shaft 2 is provided with an anti-rotation flat shaft 21 connected to the flat shaft mounting hole 11, and the large end of the angle flat shaft 2 is provided with an angle detection flat shaft 22 connected to the angle hole 41. The anti-rotation flat shaft 21 is used to be inserted into the flat shaft mounting hole 11 to prevent the angle flat shaft 2 from rotating; the angle detection flat shaft 22 is used to be inserted into the angle hole to detect whether the angle hole 41 is qualified; the design of the large end of the angle flat shaft 2 can use the large end step end face to position the angle flat shaft 2.

[0034] The flat shaft mounting hole 11 and the angle hole 41 are both rounded rectangular structures; the deflection angle of the center line of the two rounded rectangular structures is equal to the center line of the detection substrate 1, such as Figure 5As shown; this design can effectively prevent the angle flat shaft 2 from rotating during installation or detection, reducing the installation error of the angle flat shaft 2; it can also ensure that the angle flat shaft 2 can be quickly inserted into the angle hole 41 of the crank 4 during detection.

[0035] like Figure 4 As shown, the bottom end of the step pin 3 is provided with a pin 31 connected to the pin mounting hole 12, the top end of the step pin 3 is provided with a pin 31 connected to the hinged hole 42, and the middle section of the step pin 3 is a step stage 32 that limits the curved end face of the crank 4; the step pin 3 can use the middle step stage 32 to position the curved end face of the crank 4, and after positioning, detect the height difference between the curved end face of the crank 4 and the other end face; if the bottom of the curved end face of the crank 4 is close to the top of the step stage 32, the height difference of the curved end face of the crank 4 is qualified.

[0036] like Figure 6 As shown, the contact surfaces of the angle flat shaft 2 and the step pin shaft 3 with the detection substrate 1 are provided with avoidance grooves; the design of the avoidance grooves can avoid assembly interference between the angle flat shaft 2 and the step pin shaft 3 and the detection substrate 1, thereby improving the reliability of the tooling.

[0037] The working principle of this embodiment is:

[0038] When the detection tooling provided in this embodiment is used, the angle flat shaft 2 and the step pin shaft 3 are installed in the flat shaft mounting hole 11 and the pin shaft mounting hole 12 of the detection substrate 1. The angle flat shaft 2 and the detection substrate 1 are fixedly matched by insertion; the step pin shaft 3 and the detection substrate 1 are matched with an adjustable clearance range, and the adjustable range of the step pin shaft 3 on the detection substrate 1 includes the tolerance of the center distance L of the crank 4 and the tolerance of the angle α of the angle hole 41 of the crank 4. The angle hole 41 of the crank 4 to be tested is fixed on the angle flat shaft 2. If the reamed hole 42 can be fitted on the step pin shaft 3, it can be quickly judged that the crank 4 is qualified; if the reamed hole 42 cannot be fitted on the step pin shaft 3, the crank 4 is unqualified.

[0039] As a preferred embodiment of the present invention, pin shaft mounting holes 12 with different center distances can be processed on the detection substrate 1 to be suitable for detecting cranks 4 with different center distances; the angle flat shaft 2 can be processed into multiple different models according to the angle of the crank 4, and the angle flat shaft 2 can be directly replaced when detecting cranks 4 with different angle holes 41.

[0040] Those skilled in the art will appreciate that the embodiments herein are intended to help readers understand the principles of the present invention, and should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific variations and combinations based on the technical inspiration disclosed in the present invention without departing from the essence of the present invention, and these variations and combinations are still within the protection scope of the present invention.

Claims

1. An axial compressor stator crank detection tool, characterized by: The detection substrate (1) comprises an angle flat shaft (2) and a step pin shaft (3) connected to the detection substrate (1); the angle flat shaft (2) is connected to an angle hole (41) of a crank (4), and the step pin shaft (3) is connected to a reaming hole (42) of the crank (4).

2. The axial flow compressor stator crank detection tool according to claim 1 is characterized in that: The detection substrate (1) is provided with a flat shaft mounting hole (11) and a pin shaft mounting hole (12); the angle flat shaft (2) and the step pin shaft (3) are mounted in the flat shaft mounting hole (11) and the pin shaft mounting hole (12), respectively.

3. The axial compressor stator crank detection tool according to claim 2 is characterized in that: The small end of the angle flat shaft (2) is provided with an anti-rotation flat shaft (21) connected to the flat shaft mounting hole (11), and the large end of the angle flat shaft (2) is provided with an angle detection flat shaft (22) connected to the angle hole (41).

4. The axial flow compressor stator crank detection tool according to claim 3 is characterized by: The flat shaft mounting hole (11) and the angle hole (41) are both rounded rectangular structures; the deflection angles of the center lines of the two rounded rectangular structures and the center line of the detection substrate (1) are equal.

5. The axial compressor stator crank detection tool according to claim 2, characterized in that: The bottom end of the step pin (3) is provided with a pin (31) connected to the pin mounting hole (12), the top end of the step pin (3) is provided with a pin (31) connected to the reaming hole (42), and the middle section of the step pin (3) is a step (32) that defines the curved end surface of the crank (4).

6. The axial compressor stator crank detection tool according to claim 1, characterized in that: A clearance groove is provided at the contact surface position between the angle flat shaft (2) and the step pin shaft (3) and the detection substrate (1).

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