Stator blade installation angle measuring device

Abstract

The utility model discloses a stator blade installation angle measuring device, which comprises a first positioning seat and a second positioning seat, and is characterized in that the first positioning seat is provided with two first positioning pins, and the second positioning seat is provided with two second positioning pins; the first positioning seat and the second positioning seat are respectively arranged at two ends of the connecting bracket; the rotating seat comprises a chassis and a rotating disc, and the chassis is arranged on the connecting bracket; the board ruler seat is arranged on the rotating disc, a board strip is arranged on the board ruler seat, a board ruler is arranged on the board strip, an installation clamping groove is formed in one end of the board strip, a dial indicator or a universal meter is installed on the installation clamping groove, and the dial indicator or the universal meter can slide along the installation clamping groove. Through the two first positioning pins and the two second positioning pins, the axial measurement reference and the radial measurement reference can be determined, a positioning disc matched with an inner hole in the bottom of the cartridge receiver does not need to be arranged, the size of the measurement tool can be greatly reduced, operation is convenient, the distance between the first positioning seat and the second positioning seat is adjusted, and the measurement accuracy is improved. And the device can adapt to casings with different sizes.

Description

Technical Field

[0001] This application relates to the field of gas turbines, and more particularly to a device for measuring the installation angle of stator blades. Background Technology

[0002] The compressor casing has multiple stages of adjustable stator blades, each stage consisting of multiple stator blades arranged in a ring array on the inner wall of the casing. The inner angle of each stator blade when installed in the casing has a significant impact on the compressor's performance; therefore, angle measuring tools are required to measure each stator blade in each stage during installation.

[0003] However, current measuring devices, such as the Chinese patent CN113959306B entitled "Adjustable Stator Blade Installation Angle Measuring Device, Method, and Axial Flow Compressor," disclose a measuring device that uses a positioning part to position itself against the casing. This positioning part employs a positioning disc that fits the inner hole at the bottom of the casing. This method requires the positioning disc to be the same size as the bottom of the casing, resulting in a large measuring device that is inconvenient to operate and cannot be used interchangeably with different casing models. Utility Model Content

[0004] This application proposes a stator blade installation angle measuring device, which aims to solve the problems of inconvenient positioning and lack of universality in existing measuring devices.

[0005] In this application embodiment, a stator blade installation angle measuring device is proposed, comprising:

[0006] A first positioning seat and a second positioning seat, wherein the first positioning seat is provided with two first positioning pins and the second positioning seat is provided with two second positioning pins;

[0007] A connecting bracket is provided with a first positioning seat and a second positioning seat respectively located at both ends of the connecting bracket. The axis of the connecting bracket is located on the line connecting the midpoint of the line connecting the two first positioning pins and the midpoint of the line connecting the two second positioning pins. The second positioning seat is slidably connected to the connecting bracket along the axis of the connecting bracket to adjust the distance between the first positioning seat and the second positioning seat. The second positioning seat can rotate along the axis of the connecting bracket. The sweep plane of the second positioning seat when rotating along the axis of the connecting bracket is parallel to the line connecting the two first positioning pins.

[0008] A rotating base includes a chassis and a turntable. The chassis is slidably connected to the connecting bracket. The sliding direction of the chassis is the same as the axial direction of the connecting bracket. The turntable is rotatably mounted on the chassis. When the line connecting the two first positioning pins and the line connecting the two second positioning pins are parallel, the sweep plane of the turntable during rotation is parallel to the plane containing the line connecting the two first positioning pins and the line connecting the two second positioning pins.

[0009] A ruler holder is provided on the turntable. The plane of the ruler holder is parallel to the sweep plane of the turntable during rotation. A strip is provided on the ruler holder, and a ruler is provided on the surface of the strip away from the ruler holder. The strip is slidably connected to the ruler holder. One end of the strip is provided with a mounting groove. The extension direction of the mounting groove is perpendicular to the plane of the ruler holder. A dial indicator or a universal gauge is used to mount the mounting groove, and the dial indicator or the universal gauge can slide along the mounting groove.

[0010] In this embodiment, the sides of the two first positioning pins and the two second positioning pins are cylindrical, and the end faces of the two first positioning pins and the two second positioning pins are planar.

[0011] The end faces of the two first locating pins and the two second locating pins are used to abut against the bottom surface of the front stop step of the compressor casing, and the sides of the two first locating pins and the two second locating pins are used to be tangent to the side surface of the front stop step of the compressor casing.

[0012] In this embodiment of the application, the stator blade installation angle measuring device further includes a lead screw, which is slidably and rotatably connected to the connecting bracket from one end of the connecting bracket away from the first positioning seat. The lead screw is parallel to the axis of the connecting bracket, the sliding direction of the lead screw is the same as the axis of the connecting bracket, and the rotation axis of the lead screw when it rotates is the axis of the lead screw.

[0013] The second positioning seat is located at the end of the lead screw away from the first positioning seat, and the base is located on the nut of the lead screw.

[0014] In this embodiment of the application, the connecting bracket includes a first crossbeam, a second crossbeam, and a mounting block;

[0015] The first crossbeam and the second crossbeam are spaced apart and parallel to each other. When the line connecting the two first positioning pins and the line connecting the two second positioning pins are parallel, the plane containing the first crossbeam and the second crossbeam is parallel to the plane containing the line connecting the two first positioning pins and the line connecting the two second positioning pins.

[0016] The ends of the first crossbeam and the second crossbeam near the first positioning seat are connected to the first positioning seat. The mounting block is connected to the ends of the first crossbeam and the second crossbeam away from the first positioning seat. The mounting block is provided with a sliding hole, which is located between the first crossbeam and the second crossbeam. The lead screw is slidably and rotatably connected to the connecting bracket through the sliding hole.

[0017] In this embodiment of the application, the nut of the lead screw is located between the mounting block and the first positioning seat.

[0018] In this embodiment of the application, a first fastening bolt is provided on the sliding hole. The first fastening bolt is used to fix the lead screw in the sliding hole or to release the lead screw so that the lead screw can slide or rotate in the sliding hole.

[0019] In this embodiment of the application, a ruler groove is provided on the plate surface of the ruler holder away from the turntable. The ruler groove extends along the extending direction of the ruler holder, and the strip is disposed in the ruler groove so that the strip can slide along the ruler groove.

[0020] In this embodiment of the application, the ruler slot is provided with a second fastening bolt, which is used to fix the strip in the ruler slot or release the strip so that the strip can slide along the ruler slot.

[0021] In this embodiment, a mounting plate is also included, which is disposed in the mounting slot and is slidable along the mounting slot;

[0022] The mounting plate is provided with multiple mounting holes for mounting the dial indicator or universal gauge.

[0023] In this embodiment, the mounting slot is provided with a third fastening bolt, which is used to fix the mounting plate in the mounting slot or to release the mounting plate so that the mounting plate can slide along the mounting slot.

[0024] In this embodiment, a first positioning seat, a second positioning seat, and a connecting bracket are provided. The axial measurement reference and the radial measurement reference can be determined by the two first positioning pins on the first positioning seat and the two second positioning pins on the second positioning seat. There is no need to set a positioning disc that matches the inner hole at the bottom of the casing, which can greatly reduce the size of the measuring tool and facilitate operation. In addition, the axial second positioning seat of the connecting bracket is slidably connected to the connecting bracket. That is, the distance between the first positioning seat and the second positioning seat can be adjusted to adapt to casings of different sizes, making it more versatile. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the measuring device in one embodiment of this application;

[0027] Figure 2 This is a schematic diagram of a measuring device disposed at the front stop of the compressor casing in one embodiment of this application;

[0028] Figure 3 This is a side view of the measuring device in one embodiment of this application;

[0029] Figure 4 This is a cross-sectional view of the second positioning seat of the measuring device in one embodiment of this application;

[0030] Figure 5 This is a cross-sectional view of the mounting block of the measuring device in one embodiment of this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 100-Jarhouse, 110-Front stop, 200-First positioning seat, 210-First positioning pin, 300-Second positioning seat, 310-Second positioning pin, 320-Fixing pin, 330-Fixing hole, 400-Connecting bracket, 410-First crossbeam, 420-Second crossbeam, 430-Mounting block, 440-Sliding hole, 450-First fastening bolt, 500-Screw rod, 510-Nut, 600-Rotating seat, 610-Chassis, 620-Turntable, 700-Scale seat, 710-Strip, 720-Scale, 730-Scale slot, 731-Second fastening bolt, 740-Mounting slot, 750-Mounting plate, 751-Third fastening bolt, 752-Mounting hole, 760-Universal gauge.

[0033] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0034] The technical solutions of the embodiments of this application 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 this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0035] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0036] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are 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, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0037] like Figure 1 As shown in the embodiment of this application, a stator blade installation angle measuring device is proposed, comprising:

[0038] A first positioning seat 200 and a second positioning seat 300 are provided. The first positioning seat 200 is provided with two first positioning pins 210, and the second positioning seat 300 is provided with two second positioning pins 310.

[0039] A connecting bracket 400 is provided, with the first positioning seat 200 and the second positioning seat 300 respectively disposed at both ends of the connecting bracket 400. The axis of the connecting bracket 400 is located on the line connecting the midpoint of the line connecting the two first positioning pins 210 and the midpoint of the line connecting the two second positioning pins 310. The second positioning seat 300 is slidably connected to the connecting bracket 400 along the axis of the connecting bracket 400 to adjust the distance between the first positioning seat 200 and the second positioning seat 300. The second positioning seat 300 can rotate along the axis of the connecting bracket 400. The sweep plane of the second positioning seat 300 when rotating along the axis of the connecting bracket 400 is parallel to the line connecting the two first positioning pins 210.

[0040] A rotating base 600 includes a chassis 610 and a turntable 620. The chassis 610 is slidably connected to the connecting bracket 400. The sliding direction of the chassis 610 is the same as the axial direction of the connecting bracket 400. The turntable 620 is rotatably mounted on the chassis 610. When the line connecting the two first positioning pins 210 and the line connecting the two second positioning pins 310 are parallel, the sweep plane of the turntable 620 during rotation is parallel to the plane containing the line connecting the two first positioning pins 210 and the line connecting the two second positioning pins 310.

[0041] A ruler holder 700 is disposed on the turntable 620. The plane of the ruler holder 700 is parallel to the sweep plane of the turntable 620 during rotation. A strip 710 is provided on the ruler holder 700. A ruler 720 is provided on the surface of the strip 710 away from the ruler holder 700. The strip 710 is slidably connected to the ruler holder 700. One end of the strip 710 is provided with a mounting groove 740. The extension direction of the mounting groove 740 is perpendicular to the plane of the ruler holder 700. A dial indicator or a universal gauge 760 is used to mount the mounting groove 740. The dial indicator or the universal gauge 760 can slide along the mounting groove 740.

[0042] like Figure 2 As shown, generally, the front stop 110 of the compressor casing 100 has a circular step. The circle containing the side of this circular step is coaxial with the casing 100, and the bottom surface of this circular step is perpendicular to the axis of the casing 100. When measuring the stator blade installation angle, it is necessary to determine the axial measurement reference and the radial measurement reference of the measuring device. The axial measurement reference needs to be perpendicular to the axis of the casing 100, and the radial reference needs to coincide with the axis of the casing 100. Therefore, in this embodiment, when determining the measurement reference, the step of the front stop 110 of the casing 100 can be used. For example, when determining the axial measurement reference, the bottom surface of the step can be used, and when determining the radial measurement reference, the side surface of the step can be used.

[0043] like Figure 1 As shown in the embodiment of this application, both the first positioning seat 200 and the second positioning seat 300 are generally elongated. The first positioning seat 200 is provided with two first positioning pins 210, which are spaced apart. The second positioning seat 300 is provided with two second positioning pins 310, which are also spaced apart. The first positioning seat 200 and the second positioning seat 300 are connected by an intermediate connecting bracket 400. Figure 1 In the diagram, L1 represents the line connecting the two first locating pins 210, L2 represents the line connecting the two second locating pins 310, and L3 represents the axis of the connecting bracket 400. Figure 1In the orientation shown, during connection, the left end of the connecting bracket 400 can be connected to the midpoint of the line connecting the two first positioning pins 210. Specifically, this can be achieved through a threaded connection. After the first positioning seat 200 and the connecting bracket 400 are screwed together, they are fixed relative to each other. The right end of the connecting bracket 400 can be connected to the midpoint of the line connecting the two second positioning pins 310. Moreover, during connection, L3 is made perpendicular to L1 and L2, that is, the axis of the connecting bracket 400 is set perpendicular to the line connecting the two first positioning pins 210 on the first positioning seat 200, and also perpendicular to the line connecting the two second positioning pins 310 on the second positioning seat 300. Then, when the second positioning seat 300 rotates about the axis of the connecting bracket 400, the sweep plane of the line connecting the two second positioning pins 310, i.e., the sweep plane of L2, will necessarily be parallel to the line connecting the two first positioning pins 210, L1.

[0044] In addition, such as Figure 3 As shown in the embodiment of this application, the heights of the two first positioning pins 210 and the two second positioning pins 310 are the same. When the second positioning seat 300 rotates about the axis of the connecting bracket 400, making the line L2 connecting the two second positioning pins 310 parallel to the line L1 connecting the two first positioning pins 210, the distance d1 from the end face of the first positioning pin 210 to the axis L3 of the connecting bracket 400 is the same as the distance d2 from the end face of the second positioning pin 310 to the axis L3 of the connecting bracket 400. At this time, the end faces of the two first positioning pins 210 and the end faces of the two second positioning pins 310 are located on the same plane.

[0045] Based on this, such as Figure 1 , Figure 2 , Figure 3As shown, when determining the measurement reference, the second positioning seat 300 can first be slid along the axis L3 of the connecting bracket 400 to adjust the distance between the first positioning seat 200 and the second positioning seat 300, so that both first positioning pins 210 and both second positioning pins 310 can be placed on the bottom surface of the step of the front stop 110 of the housing 100. Then, the second positioning seat 300 is finely adjusted to rotate along the axis L3 of the connecting bracket 400. It should be noted that when the second positioning seat 300 is finely adjusted to rotate along the axis L3 of the connecting bracket 400, it is not that the second positioning seat 300 as a whole revolves around the axis L3 of the connecting bracket 400, but rather that the second positioning seat 300 is fitted onto the axis L3 of the connecting bracket 400 and rotates on its own axis about the axis L3. Therefore, when the second positioning seat 300 rotates around L3, the distance between the first positioning seat 200 and the second positioning seat 300 is adjusted to adjust the distance between the first positioning pins 210 and the second positioning pins 310, so that the distance between the first positioning pins 210 and the second positioning pins 310 can be placed on the bottom surface of the step of the front stop 110 of the housing 100. Then, the distance between the first positioning pins 210 and the second positioning pins 310 is adjusted to rotate along the axis L3 of the connecting bracket 400. 3. During rotation, the positions of the two second positioning pins 310 can be changed. Since the sweep plane of the second positioning seat 300 rotating along the axis of the connecting bracket 400 is parallel to the line connecting the two first positioning pins 210, that is, the sweep plane of L2 is parallel to L1, by rotating the second positioning seat 300, L1 and L2 can be made parallel. When L1 and L2 are parallel, the end faces of the two first positioning pins 210 and the end faces of the two second positioning pins 310 are located on the same plane. The end faces of the two first positioning pins 210 and the end faces of the two second positioning pins 310 can contact the bottom surface of the front stop 110 step. At this time, the axial reference of the measuring device is parallel to the bottom surface of the front stop 110 step, and the bottom surface of the step is perpendicular to the axis of the housing 100. That is, the axial reference of the measuring device is perpendicular to the axis of the housing 100, that is, the axial measurement reference has been determined.

[0046] After determining the axial reference, the radial measurement reference is then determined. The second positioning seat 300 can slide along the axial direction of the connecting bracket 400. At this time, the second positioning seat 300 is slid again to further adjust the distance between the first positioning seat 200 and the second positioning seat 300. The positions of the first positioning seat 200 and the second positioning seat 300 on the circumferential direction of the bottom surface of the front stop 110 step are appropriately rotated so that the sides of the two first positioning pins 210 and the two second positioning pins 310 are all in contact with the side of the front stop 110 step. When the sides of the two first positioning pins 210 and the two second positioning pins 310 are all in contact with the side of the front stop 110, the two first positioning pins 210 and the two second positioning pins 310 are all located on the circle containing the side of the front stop 110 step. At this time, the line connecting the two first positioning pins 210 is a chord of the circle containing the side of the step, and the line connecting the two second positioning pins 310 is a chord of the circle containing the side of the step. Another chord, and the line connecting the two first positioning pins 210 is parallel to the line connecting the two second positioning pins 310, that is, the two chords are parallel, and the axis of the connecting bracket 400 is perpendicular to the lines connecting the two first positioning pins 210 and the two second positioning pins 310 respectively, that is, perpendicular to the two chords. Moreover, the connection point between the connecting bracket 400 and the two chords is their respective midpoints. At this time, the axis of the connecting bracket 400 must coincide with or be parallel to a diameter of the circle on the side of the front stop 110 step. The axis of the connecting bracket 400 must pass through the axis of the circle on the side of the front stop 110 step. The circle on the side of the front stop 110 step is coaxial with the housing 100. Therefore, the axis of the connecting bracket 400 must pass through the axis of the housing 100. Based on this, by adjusting the position of other measuring components on the connecting bracket 400, the radial measuring reference of the measuring device can be adjusted to be coaxial with the housing 100.

[0047] Continue to refer to Figure 1 In this embodiment, the base 610 of the rotating seat 600 is generally square, and the turntable 620 is generally circular. A circular mounting groove can be provided on the base 610, and the turntable 620 can be mounted on a bearing, with the bearing placed within the mounting groove, thus enabling the turntable 620 to rotate on the base 610. It should also be noted that while the base 610 is generally square in this embodiment, it can have other shapes in other embodiments. This application does not limit the shape of the base 610.

[0048] Continue to refer to Figure 1In this embodiment, the base 610 of the rotating seat 600 can slide along the axial direction of the connecting bracket 400. When the radial measurement reference of the measuring device is adjusted to be coaxial with the housing 100, the position of the sliding base 610 on the connecting bracket 400 can be achieved. For example, in this embodiment, a dial indicator can be used to determine the radial measurement reference. First, after determining that the axis of the connecting bracket 400 passes through the axis of the housing 100, the dial indicator is installed in the mounting slot 740, so that the measuring end of the dial indicator abuts against the side of the step of the front stop 110, and the turntable 620 is rotated. At this time, the measuring end of the dial indicator can slide along the side of the step of the front stop. During the sliding process, the value of the dial indicator will change. If the value of the dial indicator does not change, or the change range is within a preset range, it indicates that the radial measurement reference is correct. The radial measurement reference is aligned with the circle containing the side of the step of the front stop 110. If the change exceeds the preset value, it indicates that the radial measurement reference still has a large error with the axis of the circle containing the side of the step of the front stop 110. In this case, the axial position of the chassis 610 on the connecting bracket 400 can be adjusted. After adjustment, the turntable 620 is rotated again, and the value of the dial indicator is used to determine whether the radial measurement reference is aligned with the side of the step of the front stop 110. The above process is repeated until the dial indicator does not change or the change is within the preset range. When the chassis 610 is axially adjusted to a certain position on the connecting bracket 400, and the dial indicator of the turntable 620 does not change or the change is within the preset range, it indicates that at this position of the chassis 610, the radial measurement reference of the measuring device is aligned with the circle containing the side of the step of the front stop 110, that is, it coincides with the axis of the casing 100. At this time, the radial measurement reference is determined.

[0049] Continue to refer to Figure 1 The ruler holder 700 is roughly elongated. The elongated ruler holder 700 is parallel to the sweep plane of the turntable 620 when it rotates. When the line connecting the two first positioning pins 210 and the line connecting the two second positioning pins 310 are parallel, the sweep plane of the turntable 620 when it rotates is parallel to the plane containing the line connecting the two first positioning pins 210 and the line connecting the two second positioning pins 310. Therefore, when the line connecting the two first positioning pins 210 and the line connecting the two second positioning pins 310 are parallel, that is, parallel to L1 and L2, the plane containing the elongated ruler holder 700 is parallel to the plane containing L1 and L2. Therefore, the ruler 720 on the ruler holder 700 is also parallel to the plane containing L1 and L2. One surface of the ruler holder 700 is mounted on the turntable 620, while a strip 710 is slidably mounted on the other surface. A ruler 720 is mounted on the surface of the strip 710 furthest from the turntable 620. The ruler 720 can be embedded in the strip 710, or graduations can be directly provided on the surface of the strip 710 furthest from the turntable 620 to form the ruler 720. The strip 710 can slide along the plane of the ruler holder 700, thus changing the length of the extended strip 710.

[0050] Continue to refer to Figure 1 , Figure 2 , Figure 3 One end of the slat 710 is provided with a mounting slot 740. When L1 and L2 are parallel, the extension direction of the mounting slot 740 is perpendicular to the plane where L1 and L2 are located, that is, the extension direction of the mounting slot 740 is parallel to the axial direction of the housing 100. The universal gauge 760 can be installed in the mounting slot 740. When the universal gauge 760 slides in the mounting slot 740, it can change the axial position of the universal gauge 760 in the housing 100.

[0051] Once the axial and radial measurement references are determined, replace the dial indicator with a universal gauge 760. By adjusting the position of the universal gauge 760 on the mounting slot 740, the axial depth of the universal gauge 760 inserted into the housing 100 can be adjusted. By sliding the slat 710, the radial position of the slat 710 in the housing 100 can be changed, which in turn changes the radial position of the universal gauge 760 in the housing 100. By rotating the turntable 620, the circumferential position of the universal gauge 760 in the housing 100 can be changed. For example, after installing the stator blade and measuring its installation angle, first slide the universal dial indicator 760 in the mounting slot 740 so that the universal dial indicator 760 is aligned with the stator blade to be measured. Then slide the strip 710 to change the contact position of the universal dial indicator 760 radially with the stator blade to be measured in the housing 100. The measurement position of the universal dial indicator 760 is determined by the scale on the ruler 720. When the ruler 720 slides to the corresponding scale with the strip 710, the universal dial indicator 760 has reached the corresponding measurement position. At this time, rotate the measuring handle of the universal dial indicator 760 so that the measuring handle of the universal dial indicator 760 has the same tilt angle as the stator blade. The scale value on the universal dial indicator 760 at this time is the installation angle of the stator blade. According to the difference between the measured actual installation angle and the theoretical installation angle required by the stator blade, the stator blade can be adjusted accordingly until the actual installation angle of the stator blade is the same as the theoretical installation angle, or the difference is within the preset range.

[0052] In this embodiment, a first positioning seat 200, a second positioning seat 300, and a connecting bracket 400 are provided. The axial measurement reference and the radial measurement reference can be determined by the two first positioning pins 210 on the first positioning seat 200 and the two second positioning pins 310 on the second positioning seat 300. There is no need to set a positioning disc that matches the inner hole at the bottom of the housing 100, which can greatly reduce the size of the measuring tool and facilitate operation. In addition, the second positioning seat 300 on the axial direction of the connecting bracket 400 is slidably connected to the connecting bracket 400. That is, the distance between the first positioning seat 200 and the second positioning seat 300 can be adjusted to adapt to housings 100 of different sizes, making it more versatile.

[0053] like Figure 1 and Figure 3 As shown in the embodiment of this application, the sides of the two first positioning pins 210 and the two second positioning pins 310 are all cylindrical surfaces, and the end faces of the two first positioning pins 210 and the two second positioning pins 310 are all planar surfaces; the end faces of the two first positioning pins 210 and the two second positioning pins 310 are all used to abut against the bottom surface of the step of the front stop 110 of the compressor casing 100, and the sides of the two first positioning pins 210 and the two second positioning pins 310 are all used to be tangent to the side surface of the step of the front stop 110 of the compressor casing 100.

[0054] Reference Figure 1 and 3 In this embodiment, the end faces of the first locating pin 210 and the second locating pin 310 are set as planes. When determining the axial measurement reference, the end faces of both the first locating pins 210 and the two second locating pins 310 are in contact with the bottom surface of the front stop 110 step to ensure the accuracy of the axial measurement reference. The side faces of the first locating pins 210 and the second locating pins 310 are set as cylindrical surfaces. When determining the radial measurement reference, the side faces of both the first locating pins 210 and the two second locating pins 310 are tangent to the side faces of the front stop 110 step to ensure the accuracy of the radial measurement reference. The sides of the two first positioning pins 210, the two second positioning pins 310, and the side of the front stop 110 step are all circumferential surfaces. The circumferential diameter of the side of the front stop 110 step is much larger than the circumferential diameter of the sides of the first positioning pins 210 and the two second positioning pins 310. In addition, the fact that the sides of the two first positioning pins 210 and the two second positioning pins 310 are tangent to the side of the front stop 110 step means that the sides of the two first positioning pins 210 and the two second positioning pins 310 are in contact with the side of the front stop 110 step.

[0055] like Figure 1 As shown in this embodiment, the measuring device further includes a lead screw 500, which is slidably and rotatably connected to the connecting bracket 400 from one end away from the first positioning seat 200. The lead screw 500 is parallel to the axis of the connecting bracket 400, the sliding direction of the lead screw 500 is the same as the axis of the connecting bracket 400, and the axis of rotation of the lead screw 500 is the axis of the lead screw 500.

[0056] The second positioning seat 300 is located at the end of the lead screw 500 away from the first positioning seat 200, and the base 610 is located on the nut 510 of the lead screw 500.

[0057] Reference Figure 1The lead screw 500 can be a component that can convert rotary motion into linear motion, such as a ball screw. The lead screw 500 is provided with a nut 510. The nut 510 and the lead screw 500 can rotate relative to each other. When the nut 510 and the lead screw 500 rotate relative to each other, the nut 510 can reciprocate along the axial direction of the lead screw 500.

[0058] Continue to refer to Figure 1 The movement of the lead screw 500 can be divided into two parts. The first part is the sliding of the lead screw 500 along the connecting bracket 400 or the rotation along the axis of the connecting bracket 400. The second part is the motion of the lead screw 500 itself that converts rotation into linear motion.

[0059] For the first part of the motion, Figure 1 In the indicated orientation, the lead screw 500 is slidably connected to the connecting bracket 400 from its right end. The sliding direction is the same as the axial direction of both the lead screw 500 and the connecting bracket 400. The second positioning seat 300 is located at the right end of the lead screw 500, i.e., the end furthest from the first positioning seat 200. When the lead screw 500 slides, the second positioning seat 300 can slide with it, thereby changing the distance between the first positioning seat 200 and the second positioning seat 300. The lead screw 500 can also rotate around its own axis. When the lead screw 500 rotates, the second positioning seat 300 can rotate accordingly, thus adjusting the plane containing the line connecting the two second positioning pins 310 on the second positioning seat 300, thereby facilitating the determination of the axial measurement reference.

[0060] For the second part of the motion, the lead screw 500 and the nut 510 on it rotate relative to each other. At this time, the lead screw 500 is in... Figure 1 In the indicated orientation, the position of the nut 510 in the left-right direction remains unchanged, while the nut 510 reciprocates linearly along the lead screw 500 in the left-right direction. The base 610 is mounted on the nut 510 of the lead screw 500. By rotating the lead screw 500 or the nut 510, the position of the nut 510 in the axial direction of the lead screw 500 can be adjusted, thereby changing the position of the base 610 on the first positioning lead screw 500, which facilitates the determination of the radial measurement reference.

[0061] like Figure 4 As shown in this embodiment, a fixing hole 330 can be provided on the second positioning seat 300, and a fixing pin 320 can be provided on the second positioning seat 300. The fixing pin 320 extends into the fixing hole 330, and the right end of the lead screw 500 is provided with a corresponding insertion hole. Figure 1 In the indicated orientation, the second positioning seat 300 can be sleeved on the right end of the lead screw 500 through the fixing hole 330. The fixing pin 320 passes through the fixing hole 330 from the outer side of the second positioning seat 300 and into the insertion hole at the right end of the lead screw 500, thereby fixing the second mounting seat on the lead screw 500.

[0062] like Figure 1 As shown in the embodiment of this application, the connecting bracket 400 includes a first crossbeam 410, a second crossbeam 420, and a mounting block 430;

[0063] The first crossbeam 410 and the second crossbeam 420 are spaced apart and parallel to each other. When the line connecting the two first positioning pins 210 and the line connecting the two second positioning pins 310 are parallel, the plane containing the first crossbeam 410 and the second crossbeam 420 is parallel to the plane containing the line connecting the two first positioning pins 210 and the line connecting the two second positioning pins 310.

[0064] The ends of the first crossbeam 410 and the second crossbeam 420 near the first positioning seat 200 are connected to the first positioning seat 200. The mounting block 430 is connected to the ends of the first crossbeam 410 and the second crossbeam 420 away from the first positioning seat 200. The mounting block 430 is provided with a sliding hole 440, which is located between the first crossbeam 410 and the second crossbeam 420. The lead screw 500 is slidably and rotatably connected to the connecting bracket 400 through the sliding hole 440.

[0065] In this embodiment of the application, the first crossbeam 410 and the second crossbeam 420 can be elongated strips. Figure 1 In the indicated orientation, the left ends of the first crossbeam 410 and the second crossbeam 420 are bolted to the first positioning seat 200, and the right ends of the first crossbeam 410 and the second crossbeam 420 are bolted to the mounting block 430. The lead screw 500 passes through the sliding hole 440 on the mounting block 430, thereby forming a sliding and rotating connection with the connecting bracket 400, which enables the first part of the movement of the lead screw 500. The first crossbeam 410, the second crossbeam 420, the first positioning seat 200, and the mounting block 430 can enclose a rectangular bracket. During measurement, the first positioning seat 200 and the second positioning seat 300 are set on the bottom surface of the front stop 110 step, and other measuring components are supported on the rectangular bracket formed by the first crossbeam 410 and the second crossbeam 420, which has high stability.

[0066] like Figure 1 As shown in this embodiment, the nut 510 of the lead screw 500 is located between the mounting block 430 and the first positioning seat 200.

[0067] Reference Figure 1 ,exist Figure 1In the indicated orientation, the lead screw 500 passes through the sliding hole 440. The left end of the lead screw 500 is located between the first crossbeam 410 and the second crossbeam 420, and between the first positioning seat 200 and the mounting block 430. The nut 510 is located on the part of the lead screw 500 between the first positioning seat 200 and the mounting block 430. Other measuring components are set on the nut 510. That is, the center of the other components is approximately located within the area enclosed by the first crossbeam 410, the second crossbeam 420, the first positioning seat 200, and the second positioning seat 300, thus providing high stability.

[0068] Alternatively, the sliding hole 440 on the mounting block 430 can be set to be coaxial with the connecting bracket 400. After the lead screw 500 passes through the sliding hole 440, the distance from the lead screw 500 to the first crossbeam 410 and the second crossbeam 420 is the same. After the measuring device is set at the front stop 110, the force is more balanced, which further improves the stability of the measuring device during measurement.

[0069] like Figure 1 , Figure 5 As shown in the embodiment of this application, a first fastening bolt 450 is provided on the sliding hole 440. The first fastening bolt 450 is used to fix the lead screw 500 in the sliding hole 440, or to release the lead screw 500 so that the lead screw 500 can slide or rotate in the sliding hole 440.

[0070] Reference Figure 5 The first fastening bolt 450 passes through the outer side of the mounting block 430 and enters the interior of the mounting block 430, and can contact the lead screw 500 in the sliding hole 440. When the first fastening bolt 450 is tightened, the first fastening bolt 450 abuts against the lead screw 500 in the sliding hole 440, thereby fixing the lead screw 500. When the first fastening bolt 450 is loosened, the lead screw 500 is released, and can then slide and rotate in the sliding hole 440.

[0071] like Figure 1 As shown in this embodiment, the ruler holder 700 has a ruler groove 730 on its surface away from the turntable 620. The ruler groove 730 extends along the extending direction of the ruler holder 700, and the strip 710 is disposed within the ruler groove 730 so that the strip 710 can slide along the ruler groove 730. The ruler groove 730 on the ruler holder 700 and the strip 710 disposed within it facilitate adjustment of the radial extension length of the strip 710 in the housing 100.

[0072] like Figure 1In this embodiment, the ruler slot 730 is provided with a second fastening bolt 731. The second fastening bolt 731 is used to fix the strip 710 in the ruler slot 730, or to release the strip 710 so that the strip 710 can slide along the ruler slot 730. The second fastening bolt 731 can extend from the side of the ruler seat 700 into the ruler slot 730. When the second fastening bolt 731 is tightened, it is in close contact with the strip 710, thereby fixing the strip 710. When the second fastening bolt 731 is loosened, the strip 710 is released, allowing adjustment of its position.

[0073] like Figure 2 , Figure 3 As shown in the embodiment of this application, the measuring device further includes a mounting plate 750, which is disposed in the mounting slot 740 and can slide along the mounting slot 740; the mounting plate 750 is provided with a plurality of mounting holes 752, which are used to mount the dial indicator or universal gauge 760.

[0074] The mounting plate 750 is roughly elongated and can slide within the mounting groove. The mounting plate 750 has multiple mounting holes 752, each of which can be of different sizes. When installing a universal gauge 760 or a dial indicator, different sizes or spacing of mounting holes 752 can be used to install the universal gauge 760 or dial indicator based on different models.

[0075] like Figure 3 As shown in this embodiment, the mounting slot 740 is provided with a third fastening bolt 751. The third fastening bolt 751 is used to fix the mounting plate 750 in the mounting slot 740, or to release the mounting plate 750 so that the mounting plate 750 can slide along the mounting slot 740. The third fastening bolt 751 can extend from the outside of the mounting slot 740 into the mounting slot 740. When the third fastening bolt 751 is tightened, it makes tight contact with the slot, thereby fixing the mounting plate 750. When the third fastening bolt 751 is loosened, the mounting plate 750 is released, allowing adjustment of its position.

[0076] In this embodiment, a first positioning seat 200, a second positioning seat 300, and a connecting bracket 400 are provided. The axial measurement reference and the radial measurement reference can be determined by the two first positioning pins 210 on the first positioning seat 200 and the two second positioning pins 310 on the second positioning seat 300. There is no need to set a positioning disc that matches the inner hole at the bottom of the housing 100, which can greatly reduce the size of the measuring tool and facilitate operation. In addition, the second positioning seat 300 on the axial direction of the connecting bracket 400 is slidably connected to the connecting bracket 400. That is, the distance between the first positioning seat 200 and the second positioning seat 300 can be adjusted to adapt to housings 100 of different sizes, making it more versatile.

[0077] The above description is merely an optional embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A device for measuring the installation angle of a stator blade, characterized in that, include: A first positioning seat and a second positioning seat, wherein the first positioning seat is provided with two first positioning pins and the second positioning seat is provided with two second positioning pins; A connecting bracket is provided with a first positioning seat and a second positioning seat respectively located at both ends of the connecting bracket. The axis of the connecting bracket is located on the line connecting the midpoint of the line connecting the two first positioning pins and the midpoint of the line connecting the two second positioning pins. The second positioning seat is slidably connected to the connecting bracket along the axis of the connecting bracket to adjust the distance between the first positioning seat and the second positioning seat. The second positioning seat can rotate along the axis of the connecting bracket. The sweep plane of the second positioning seat when rotating along the axis of the connecting bracket is parallel to the line connecting the two first positioning pins. A rotating base includes a chassis and a turntable. The chassis is slidably connected to the connecting bracket. The sliding direction of the chassis is the same as the axial direction of the connecting bracket. The turntable is rotatably mounted on the chassis. When the line connecting the two first positioning pins and the line connecting the two second positioning pins are parallel, the sweep plane of the turntable during rotation is parallel to the plane containing the line connecting the two first positioning pins and the line connecting the two second positioning pins. A ruler holder is provided on the turntable. The plane of the ruler holder is parallel to the sweep plane of the turntable during rotation. A strip is provided on the ruler holder, and a ruler is provided on the surface of the strip away from the ruler holder. The strip is slidably connected to the ruler holder. One end of the strip is provided with a mounting groove. The extension direction of the mounting groove is perpendicular to the plane of the ruler holder. A dial indicator or a universal gauge is used to mount the mounting groove, and the dial indicator or the universal gauge can slide along the mounting groove.

2. The stator blade installation angle measuring device as described in claim 1, characterized in that, The sides of both first positioning pins and both second positioning pins are cylindrical, and the end faces of both first positioning pins and both second positioning pins are planar. The end faces of the two first locating pins and the two second locating pins are used to abut against the bottom surface of the front stop step of the compressor casing, and the sides of the two first locating pins and the two second locating pins are used to be tangent to the side surface of the front stop step of the compressor casing.

3. The stator blade installation angle measuring device as described in claim 1, characterized in that, The stator blade installation angle measuring device further includes a lead screw, which is slidably and rotatably connected to the connecting bracket from the end of the connecting bracket away from the first positioning seat. The lead screw is parallel to the axis of the connecting bracket, the sliding direction of the lead screw is the same as the axis of the connecting bracket, and the axis of rotation of the lead screw is the axis of the lead screw. The second positioning seat is located at the end of the lead screw away from the first positioning seat, and the base is located on the nut of the lead screw.

4. The stator blade installation angle measuring device as described in claim 3, characterized in that, The connecting bracket includes a first crossbeam, a second crossbeam, and a mounting block; The first crossbeam and the second crossbeam are spaced apart and parallel to each other. When the line connecting the two first positioning pins and the line connecting the two second positioning pins are parallel, the plane containing the first crossbeam and the second crossbeam is parallel to the plane containing the line connecting the two first positioning pins and the line connecting the two second positioning pins. The ends of the first crossbeam and the second crossbeam near the first positioning seat are connected to the first positioning seat. The mounting block is connected to the ends of the first crossbeam and the second crossbeam away from the first positioning seat. The mounting block is provided with a sliding hole, which is located between the first crossbeam and the second crossbeam. The lead screw is slidably and rotatably connected to the connecting bracket through the sliding hole.

5. The stator blade installation angle measuring device as described in claim 4, characterized in that, The nut of the lead screw is located between the mounting block and the first positioning seat.

6. The stator blade installation angle measuring device as described in claim 4, characterized in that, The sliding hole is provided with a first fastening bolt, which is used to fix the lead screw in the sliding hole or to release the lead screw so that the lead screw can slide or rotate in the sliding hole.

7. The stator blade installation angle measuring device as described in claim 1, characterized in that, The ruler holder has a ruler groove on its surface away from the turntable. The ruler groove extends along the extension direction of the ruler holder, and the strip is disposed in the ruler groove so that the strip can slide along the ruler groove.

8. The stator blade installation angle measuring device as described in claim 7, characterized in that, The ruler slot is provided with a second fastening bolt, which is used to fix the strip in the ruler slot or to release the strip so that the strip can slide along the ruler slot.

9. The stator blade installation angle measuring device as described in claim 1, characterized in that, It also includes a mounting plate, which is disposed in the mounting slot and can slide along the mounting slot; The mounting plate is provided with multiple mounting holes for mounting the dial indicator or universal gauge.

10. The stator blade installation angle measuring device as described in claim 9, characterized in that, The mounting slot is provided with a third fastening bolt, which is used to fix the mounting plate in the mounting slot or to release the mounting plate so that the mounting plate can slide along the mounting slot.

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