Measuring device for line profile tolerance of middle shell of turbine shell

Abstract

The utility model relates to a device for measuring the line profile tolerance of a middle shell of a turbine shell. The turbine shell comprises a middle shell and a middle hole formed in the middle shell, the middle hole is provided with a stepped hole and a line contour in the axial direction of the middle hole, and the turbine shell comprises a gauge body provided with a through hole; one end of the measuring rod extends into one side of the through hole; the measuring head is installed at the other end of the measuring rod, and the measuring head can extend into the middle hole and abut against the line contour; the measuring end of the measuring meter extends into the other side of the through hole and abuts against the measuring rod. One end, close to the measuring head, of the gauge body is provided with a positioning block used for abutting against the stepped hole. According to the utility model, frequent laboratory measurement is avoided, on-site quality control is facilitated, and the production efficiency of a processing site is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of turbine shell processing, in particular to a device for measuring the contour of a middle shell line of a turbine shell. Background Art

[0002] When machining the intermediate shell of the turbine shell, refer to Figure 5 As shown, the AB segment is a line profile. When machining this segment, the tool will wear, so it is necessary to correct the tool compensation. Usually, this dimension is measured by the three-dimensional coordinate measuring machine in the inspection room.

[0003] Due to the large number of production lines, it takes time and manpower to send the dimensions to the laboratory for three-dimensional coordinate measurement when changing tools on site, which affects production efficiency. Therefore, a measurement method that can control this type line data is needed at the processing site to improve efficiency and ensure processing capacity. Summary of the invention

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the problem in the prior art that a three-coordinate measuring machine is used in measuring the profile of the volute profile, which results in wasting time and manpower and affects production efficiency.

[0005] In order to solve the above technical problems, the utility model provides a device for measuring the profile of the intermediate shell of a turbine shell, wherein the turbine shell comprises an intermediate shell and an intermediate hole arranged in the intermediate shell, wherein the intermediate hole is respectively provided with a step hole and a line profile along its axial direction, comprising:

[0006] A gauge body, wherein the gauge body is provided with a through hole;

[0007] A measuring rod, one end of which extends into one side of the through hole;

[0008] A measuring head is mounted on the other end of the measuring rod, and the measuring head can extend into the middle hole and abut against the line profile;

[0009] A measuring gauge, the measuring end of which extends into the other side of the through hole and abuts against the measuring rod;

[0010] Wherein, a positioning block for abutting against the step hole is arranged at one end of the gauge body close to the measuring head.

[0011] In one implementation of the present invention, the measuring head is disc-shaped.

[0012] In an embodiment of the present utility model, a sharp corner is reserved in the circumferential direction at one end of the measuring head in contact with the line profile.

[0013] In one embodiment of the utility model, a connecting boss is axially extended outward from the middle of the measuring head, the measuring rod extends into the connecting boss, and a fastening screw connected to the measuring rod is installed on the side wall of the connecting boss.

[0014] In an embodiment of the present utility model, one end of the positioning block in contact with the step hole is a plane and is provided with a rounded corner in the circumferential direction, and the positioning block includes a plurality of arc-shaped positioning surfaces evenly distributed in the circumferential direction.

[0015] In one embodiment of the utility model, the side wall of the gauge body is provided with a screw hole, a stroke adjustment screw is installed in the screw hole, and the side wall of the measuring rod is axially provided with a locking plane that abuts against the stroke adjustment screw.

[0016] In one implementation of the present invention, the positioning block and the gauge body are integrally formed.

[0017] In one embodiment of the utility model, the gauge body is provided with a knurled surface.

[0018] In one embodiment of the present invention, a clamping piece is further included, and the clamping piece is used to clamp the measuring end of the measuring meter and is connected to the through hole.

[0019] In one embodiment of the utility model, the clamping member includes a jacket sleeved on the measuring end of the measuring meter and a screw extending from the jacket and threadedly connected to the through hole, and the screw is threadedly connected with a locking nut.

[0020] The above technical solution of the utility model has the following advantages compared with the prior art:

[0021] The utility model discloses a device for measuring the contour of the intermediate shell line of a turbine shell. The device is arranged with a gauge body, a measuring head, a measuring table and a positioning block component. The measurement is flexible and fast. A qualified sample is first made and then calibrated using the values ​​of three-coordinate measurement. The gauge with the table is kept consistent with the standard sample, thereby ensuring that the measurement result of the measuring device at the processing site is accurate.

[0022] Using this measuring device, the centerline contour of the turbine casing can be measured directly at the production site without sending the workpiece to the laboratory for three-coordinate measurement, saving the measurement resources of the three-coordinate instrument. This greatly reduces waiting time and avoids frequent laboratory measurements, which is beneficial to on-site quality control and improves production efficiency at the processing site.

[0023] The utility model can flexibly adjust the stroke of the measuring rod by arranging the stroke adjustment screw and the locking plane, prevent the measuring rod from falling off, and ensure the stable and reliable measurement process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0025] Figure 1 The utility model is a schematic diagram of the axial structure of a device for measuring the centerline profile of a turbine casing.

[0026] Figure 2 The utility model is a schematic diagram of the main structure of a device for measuring the centerline profile of a turbine casing.

[0027] Figure 3 yes Figure 2 Cross-sectional view along the AA direction.

[0028] Figure 4 The utility model is a schematic diagram of the top view of the structure of the device for measuring the centerline profile of a turbine casing.

[0029] Figure 5 It is a schematic diagram of the turbine shell of the utility model.

[0030] Figure 6 It is a schematic diagram of the measuring device of the utility model during measurement.

[0031] Description of the Figures in the Specification:

[0032] 100, step hole; 200, line profile;

[0033] 1. Gauge body; 11. Through hole; 12. Screw hole; 13. Knurled surface;

[0034] 2. Measuring rod;

[0035] 3. Measuring head; 31. Sharp corner; 32. Connecting boss;

[0036] 4. Measuring table; 41. Measuring end;

[0037] 5. Positioning block; 51. Rounded corner; 52. Arc-shaped positioning surface;

[0038] 6. Clamping piece; 61. Jacket; 62. Screw; 63. Locking nut. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0040] In the present invention, if directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0041] In the present utility model, "several" means one or more, "multiple" means more than two, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself. In the description of the present utility model, if there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0042] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected or electrically connected or able to communicate with each other; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0043] Reference Figure 1 , Figure 2 As shown, the utility model is a device for measuring the profile of the intermediate shell of a turbine shell, the turbine shell includes an intermediate shell and an intermediate hole arranged in the intermediate shell, the intermediate hole is respectively provided with a step hole 100 and a line profile 200 along its axial direction, including:

[0044] A gauge body 1, wherein the gauge body 1 is provided with a through hole 11;

[0045] A measuring rod 2, one end of which extends into one side of the through hole 11;

[0046] A measuring head 3 is installed at the other end of the measuring rod 2, and the measuring head 3 can extend into the middle hole and abut against the line profile 200;

[0047] A measuring gauge 4, wherein a measuring end 41 of the measuring gauge 4 extends into the other side of the through hole 11 and abuts against the measuring rod 2;

[0048] Wherein, a positioning block 5 for abutting against the step hole 100 is provided at one end of the gauge body 1 close to the measuring head 3 .

[0049] The gauge body 1 is provided with a through hole 11 so that the measuring rod 2, the measuring head 3 and the measuring end 41 of the measuring meter 4 can cooperate with each other, and the overall structure of the measuring device is compact. The measuring rod 2 is against the measuring meter 4, ensuring that the measuring meter 4 can accurately sense the slight change in the position of the measuring head 3, thereby obtaining accurate measurement data.

[0050] In one embodiment, referring to Figure 2 As shown, the measuring head 3 is in the shape of a disk. Its diameter is Figure 5 GAGE∮66 is marked in the middle. Specifically, a sharp corner 31 is reserved in the circumferential direction at one end of the measuring head 3 that contacts the line profile 200. The sharp corner 31 helps to maintain precise contact with the line profile 200 and provides a stable measurement reference.

[0051] In one embodiment, referring to Figure 2 As shown, a connecting boss 32 is axially extended outward from the middle of the measuring head 3 , the measuring rod 2 extends into the connecting boss 32 , and a fastening screw connected to the measuring rod 2 is installed on the side wall of the connecting boss 32 .

[0052] In one embodiment, referring to Figure 1 , Figure 4 As shown, the positioning block 5 includes a plurality of arc-shaped positioning surfaces 52 evenly distributed in the circumferential direction. Figure 1 As shown, three arc-shaped positioning surfaces 52 spaced 120° apart can be selected. The end (bottom end) of the positioning block 5 that contacts the step hole 100 is a plane and has a rounded corner 51 in the circumferential direction. It can accurately match the step hole 100 to ensure the consistency of the measurement reference.

[0053] Reference Figure 5 As shown, the stepped hole 100 includes an A reference surface and a C reference hole, and the center of the stepped hole 100 can be determined by the C reference hole. It can be understood that when measuring, the bottom end of the positioning block 5 is against the A reference surface.

[0054] In one embodiment, referring to Figure 3 As shown, the side wall of the gauge body 1 is provided with a screw hole 12, in which a stroke adjustment screw is installed, and the side wall of the measuring rod 2 is axially provided with a locking plane that abuts against the stroke adjustment screw, so as to control the stroke of the measuring rod 2 and prevent the measuring rod 2 from falling off.

[0055] In one embodiment, the positioning block 5 is integrally formed with the gauge body 1 to ensure the overall stability of the measuring device. At the same time, the gauge body 1 is provided with a knurled surface 13, which provides a good grip and facilitates the operator to adjust the device. The measuring gauge 4 can be a dial gauge.

[0056] In one embodiment, referring to Figure 3As shown, it also includes a clamping member 6, which is used to clamp the measuring end 41 of the measuring meter 4 and is connected to the through hole 11. The clamping member 6 includes a jacket 61 sleeved on the measuring end 41 of the measuring meter 4 and a screw 62 extending from the jacket 61 and threadedly connected to the through hole 11, and the screw 62 is threadedly connected with a locking nut 63. The combination of the jacket 61 and the screw 62 enables the clamping member 6 to adapt to different measuring meters 4, ensuring that the measuring device adapts to turbine shells of different sizes and designs.

[0057] Reference Figure 6 As shown, during measurement, a sample that meets the standard is manufactured and accurately measured using a three-dimensional coordinate measuring machine in the laboratory. The obtained line profile 200 degree data is used as a reference value to calibrate the dial indicator reading on the measuring device. Specifically, the measuring device is centered with the sample C reference hole, and the bottom end of the positioning block 5 is tightly fitted with the A reference surface to determine the center of the middle hole. At the same time, the measuring head 3 is in contact with the line profile 200. After the measuring head 3 is in point contact with the line profile 200 of the sample, the scale value of the dial indicator is read and calibrated.

[0058] The workpiece to be measured is measured in the same way as the calibration to obtain the actual measurement value. By comparing the actual measurement value with the calibration value of the reference sample, it can be determined whether the contour of the workpiece is within the range of ±0.05 mm of the theoretical height value, thereby determining whether the workpiece is qualified. If it is found that the measurement result exceeds the expected tolerance range, the tool compensation or processing parameters are adjusted in time to ensure that the contour of the subsequent workpiece meets the requirements. The measuring device can quickly and accurately evaluate the turbine housing centerline profile of 200 degrees at the production site, providing reliable data support for tool wear compensation, thereby improving processing efficiency and product quality.

[0059] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A device for measuring the line profile of an intermediate shell of a turbine shell, the turbine shell comprising an intermediate shell and an intermediate hole arranged in the intermediate shell, the intermediate hole being respectively provided with a step hole (100) and a line profile (200) along its axial direction, characterized in that: include: A gauge body (1), wherein the gauge body (1) is provided with a through hole (11); A measuring rod (2), one end of the measuring rod (2) extending into one side of the through hole (11); A measuring head (3) is mounted on the other end of the measuring rod (2), and the measuring head (3) can extend into the middle hole and abut against the line profile (200); A measuring gauge (4), wherein a measuring end (41) of the measuring gauge (4) extends into the other side of the through hole (11) and abuts against the measuring rod (2); Wherein, a positioning block (5) for abutting against the step hole (100) is provided at one end of the gauge body (1) close to the measuring head (3).

2. A device for measuring the profile of the intermediate shell line of a turbine shell according to claim 1, characterized in that: The measuring head (3) is in the shape of a disc.

3. A device for measuring the profile of the intermediate shell line of a turbine shell according to claim 2, characterized in that: One end of the measuring head (3) that contacts the line profile (200) is provided with a sharp corner (31) in the circumferential direction.

4. A device for measuring the profile of the intermediate shell line of a turbine shell according to claim 2, characterized in that: A connecting boss (32) extends axially outward from the middle of the measuring head (3), the measuring rod (2) extends into the connecting boss (32), and a fastening screw connected to the measuring rod (2) is installed on the side wall of the connecting boss (32).

5. The device for measuring the profile of the intermediate shell line of a turbine shell according to claim 1, characterized in that: One end of the positioning block (5) in contact with the step hole (100) is a plane and is provided with a rounded corner (51) in the circumferential direction. The positioning block (5) comprises a plurality of arc-shaped positioning surfaces (52) evenly distributed in the circumferential direction.

6. A device for measuring the profile of the intermediate shell line of a turbine shell according to claim 1, characterized in that: The side wall of the gauge body (1) is provided with a screw hole (12), a stroke adjustment screw is installed in the screw hole (12), and the side wall of the measuring rod (2) is axially provided with a locking plane that abuts against the stroke adjustment screw.

7. A device for measuring the profile of the intermediate shell line of a turbine shell according to claim 1, characterized in that: The positioning block (5) and the gauge body (1) are integrally formed.

8. The device for measuring the profile of the intermediate shell line of a turbine shell according to claim 1, characterized in that: The gauge body (1) is provided with a knurled surface (13).

9. A device for measuring the profile of the intermediate shell line of a turbine shell according to claim 1, characterized in that: It also comprises a clamping piece (6), wherein the clamping piece (6) is used to clamp the measuring end (41) of the measuring meter (4) and is connected to the through hole (11).

10. A device for measuring the profile of the intermediate shell line of a turbine shell according to claim 9, characterized in that: The clamping member (6) comprises a jacket (61) sleeved on the measuring end (41) of the measuring gauge (4) and a screw rod (62) extending from the jacket (61) and threadedly connected to the through hole (11), wherein the screw rod (62) is threadedly connected to a locking nut (63).

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