High-precision measuring device for the outer dimensions of large wind turbine casings

Abstract

This utility model relates to the field of precision machining and measurement technology, and discloses a high-precision measuring device for the external dimensions of large wind turbine casings. It solves the problem that existing large workpiece measurements are not suitable for measuring large wind turbine casings. The device includes a rigid main measuring rod, a rigid standard calibration rod, a first rigid extension rod, and a second rigid extension rod. One end of the rigid main measuring rod is equipped with a dial indicator mounting base, through which a dial indicator is mounted. A side-head mounting base is slidably fitted onto the end of the rigid main measuring rod away from the dial indicator. A high-hardness alloy side head is fixedly mounted on the top of one side of the side-head mounting base, and the end of the high-hardness alloy side head near the dial indicator has a spherical structure. This measuring device enables high-precision measurement of the external dimensions of large wind turbine casings.

Description

Technical Field

[0001] This utility model belongs to the field of precision machining and measurement technology, specifically a high-precision measuring device for the outer dimensions of a large wind turbine casing. Background Technology

[0002] The outer diameter of the casing of large wind turbines is mostly between 1000mm and 1500mm. Conventional large workpiece measurements are mostly done using calipers, external micrometers, or laser rangefinders. Calipers have low accuracy (above ±0.02mm) and cannot meet the requirements of high-precision processing. Large external micrometers are limited by their measuring range (usually ≤1000mm) and are cumbersome to operate. Laser rangefinders are expensive and greatly affected by ambient light and surface reflectivity. Internal diameter micrometers are only suitable for measuring internal holes and cannot be directly used for measuring external diameters. Therefore, this application proposes a high-precision measuring device for the external dimensions of large wind turbine casings. Utility Model Content

[0003] In view of the above situation and to overcome the shortcomings of the prior art, this utility model provides a high-precision measuring device for the external dimensions of large wind turbine housings, which effectively solves the problem that existing large workpiece measurement methods are not suitable for measuring large wind turbine housings.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-precision measuring device for the outer dimensions of a large wind turbine casing, comprising a rigid main measuring rod, a rigid standard calibration rod, a rigid extension rod one, and a rigid extension rod two. One end of the rigid main measuring rod is provided with a dial indicator fastening base, and a dial indicator is installed through the dial indicator fastening base. The end of the rigid main measuring rod away from the dial indicator is slidably fitted with a side head mounting base. A high-hardness alloy side head is fixedly installed at the top of one side of the side head mounting base, and the end of the high-hardness alloy side head near the dial indicator has a spherical structure.

[0005] Preferably, a fastening screw 1 is provided through the bottom end of the dial indicator fastening base, and the fastening screw 1 is threadedly connected to the rigid main measuring rod. A fastening screw 2 is provided through the top end of the dial indicator fastening base, and the fastening screw 2 is threadedly connected to the dial indicator fastening base and fits against the dial indicator. The side mounting base consists of a lower ferrule, an upper ferrule, a support column, and several hand-tightening bolts. The lower ferrule and the upper ferrule are both fitted onto the end of the rigid main measuring rod away from the dial indicator fastening base. The support column is fixedly connected to the middle position of the top end of the upper ferrule. The high-hardness alloy side head is fixedly connected to the top end of one side of the support column. The hand-tightening bolts pass through the lower ferrule and are threadedly connected to the upper ferrule.

[0006] Preferably, the rigid main measuring rod has a threaded inner hole 1 at one end near the side mounting base, a sealing head connected to the threaded inner hole 1 at one end near the side mounting base, a threaded head at one end of both the rigid extension rod 1 and the rigid extension rod 2, and a threaded inner hole 2 at the other end of both the rigid extension rod 1 and the rigid extension rod 2.

[0007] Preferably, the outer surfaces of the rigid main measuring rod, the first rigid extension rod, and the second rigid extension rod are all smooth surfaces. The length of the rigid standard calibration rod is 1000mm, the length of the first rigid extension rod is 200mm, and the length of the second rigid extension rod is 300mm.

[0008] Compared with the prior art, the beneficial effects of this utility model are: (1) In operation, by setting up a rigid main measuring rod, a rigid standard calibration rod, a rigid extension rod one, a rigid extension rod two, a dial indicator fastening base, a dial indicator, a side head mounting base and a high hardness alloy side head, it is possible to achieve high-precision measurement of the outer dimensions of large wind turbine casings. Compared with traditional methods, the measurement accuracy is improved to ±0.005mm, which meets the high-precision process requirements of key components such as wind turbine casings and intermediate casings. Moreover, the structure is simple and the manufacturing cost is low. (2) By adopting the design of rigid extension rod one and rigid extension rod two with threaded interface, and setting the side mounting base consisting of lower ferrule, upper ferrule, support column and several hand-tightened bolts, the effective measuring range can cover the range of 1000mm-1500mm, which is compatible with different models of housings. It can be operated by a single person, and the measurement time is greatly shortened. Attached Figure Description

[0009] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0010] In the attached diagram: Figure 1 This is one of the structural schematic diagrams of the high-precision measuring device for the outer dimensions of a large wind turbine casing according to this utility model; Figure 2 This is a schematic diagram of the connection structure between the rigid main measuring rod, the dial indicator, and the high-hardness alloy side head of this utility model; Figure 3 This is the second schematic diagram of the high-precision measuring device for the outer dimensions of a large wind turbine casing according to this utility model; Figure 4 This is a schematic diagram of the rigid extension rod one and the rigid extension rod two of this utility model; In the diagram: 1. Rigid main measuring rod; 2. Rigid standard calibration rod; 3. Rigid extension rod one; 4. Rigid extension rod two; 5. Dial indicator fastening base; 6. Dial indicator; 7. Side head mounting base; 8. High-hardness alloy side head; 9. Fastening screw one; 10. Fastening screw two; 11. Lower ferrule; 12. Upper ferrule; 13. Support column; 14. Hand-tightening bolt; 15. Threaded inner hole one; 16. Sealing head; 17. Threaded head; 18. Threaded inner hole two. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0012] Depend on Figures 1 to 4 The present invention discloses a high-precision measuring device for the outer dimensions of a large wind turbine casing, comprising a rigid main measuring rod 1, a rigid standard calibration rod 2, a rigid extension rod 1 3, and a rigid extension rod 2 4. One end of the rigid main measuring rod 1 is provided with a dial indicator fastening base 5, and a dial indicator 6 is installed through the dial indicator fastening base 5. A side head mounting base 7 is slidably sleeved on the end of the rigid main measuring rod 1 away from the dial indicator 6. A high-hardness alloy side head 8 is fixedly provided on the top of one side of the side head mounting base 7. The end of the high-hardness alloy side head 8 near the dial indicator 6 has a spherical structure, which can reduce wear. When using, install the dial indicator 6 onto the dial indicator mounting base 5. Move the side head mounting base 7 to the appropriate position by comparing the size of the workpiece to be measured (leaving a measurement margin). Then, use the rigid standard calibration rod 2 to calibrate the size and zero the dial indicator 6 between the high hardness alloy side head 8 and the dial indicator 6 (the zero position of the dial indicator should be compressed by at least 1 / 6 of the dial bezel range to ensure the measurement ± tolerance range). After calibration, remove the rigid standard calibration rod 2, place the device on the part of the housing to be measured, and read the dial indicator deviation value ΔL. The actual diameter = reference length ± ΔL. When measuring, if the part to be measured is larger than 1000mm, install the rigid extension rod 1 3 and the rigid extension rod 2 4 at one end of the rigid main measuring rod 1. A fastening screw 9 is threaded through the bottom of the dial indicator mounting base 5 to secure it. The fastening screw 9 is threaded onto the rigid main measuring rod 1. A second fastening screw 10 is threaded through the top of the dial indicator mounting base 5, threaded onto the base and fitting against the dial indicator 6 to secure it. The side mounting base 7 consists of a lower retaining sleeve 11, an upper retaining sleeve 12, a support column 13, and several hand-tightening bolts 14. The structure consists of a lower clasp 11 and an upper clasp 12, both fitted onto the end of the rigid main measuring rod 1 away from the dial indicator fastening base 5. A support column 13 is fixedly connected to the middle position of the top of the upper clasp 12. A high-hardness alloy side head 8 is fixedly connected to the top of one side of the support column 13. A hand-tightening bolt 14 passes through the lower clasp 11 and is threadedly connected to the upper clasp 12. By loosening the hand-tightening bolt 14, the lower clasp 11 and the upper clasp 12 can be separated from the rigid main measuring rod 1, facilitating movement and adjustment. The rigid main measuring rod 1 has a threaded inner hole 15 at one end near the side mounting base 7, and a plug 16 connected to the threaded inner hole 15 at the other end near the side mounting base 7. One end of the rigid extension rod 1 3 and the rigid extension rod 2 4 are both provided with threaded heads 17, and the other end of the rigid extension rod 1 3 and the rigid extension rod 2 4 are both provided with threaded inner holes 18. The rigid extension rod 1 3 and the rigid extension rod 2 4 can be installed by threaded connection, which improves the convenience of disassembly and assembly. The plug 16 can protect the threaded inner hole 15 and prevent the side mounting base 7 from slipping. The outer surfaces of the rigid main measuring rod 1, rigid extension rod 1 3, and rigid extension rod 2 4 are all smooth, which can improve the smoothness of movement of the side mounting base 7. The length of the rigid standard calibration rod 2 is 1000mm, the length of the rigid extension rod 1 3 is 200mm, and the length of the rigid extension rod 2 4 is 300mm, which can increase the measurement range.

[0013] In operation, by incorporating a rigid main measuring rod, a rigid standard calibration rod, a rigid extension rod one, a rigid extension rod two, a dial indicator fastening base, a dial indicator, a side-mounted base, and a high-hardness alloy side head, high-precision measurement of the external dimensions of large wind turbine casings can be achieved. Compared with traditional methods, the measurement accuracy is improved to ±0.005mm, meeting the high-precision process requirements of key components such as wind turbine casings and intermediate casings. Moreover, the structure is simple and the manufacturing cost is low. Through the design of the rigid extension rod one and rigid extension rod two with threaded interfaces, and the side-mounted base consisting of a lower ferrule, an upper ferrule, a support column, and several hand-tightened bolts, the effective measuring range can cover 1000mm-1500mm, compatible with different models of casings. It can be operated by a single person, and the measurement time is greatly shortened.

Claims

1. A high-precision measuring device for the outer dimensions of a large wind turbine casing, comprising a rigid main measuring rod (1), a rigid standard calibration rod (2), a rigid extension rod one (3), and a rigid extension rod two (4), characterized in that: One end of the rigid main measuring rod (1) is provided with a dial indicator fastening base (5), and a dial indicator (6) is provided through the dial indicator fastening base (5). The end of the rigid main measuring rod (1) away from the dial indicator (6) is slidably fitted with a side head mounting base (7), and a high hardness alloy side head (8) is fixedly provided on the top of one side of the side head mounting base (7).

2. The high-precision measuring device for the external dimensions of a large wind turbine casing according to claim 1, characterized in that: The end of the high-hardness alloy side head (8) near the dial indicator (6) has a spherical structure.

3. The high-precision measuring device for the external dimensions of a large wind turbine casing according to claim 1, characterized in that: The bottom end of the dial indicator fastening base (5) is provided with a fastening screw one (9), which is threadedly connected to the rigid main measuring rod (1). The top end of the dial indicator fastening base (5) is provided with a fastening screw two (10), which is threadedly connected to the dial indicator fastening base (5) and fits against the dial indicator (6).

4. The high-precision measuring device for the external dimensions of a large wind turbine casing according to claim 1, characterized in that: The side head mounting base (7) consists of a lower sleeve (11), an upper sleeve (12), a support column (13), and several hand-tightening bolts (14). The lower sleeve (11) and the upper sleeve (12) are both fitted onto the end of the rigid main measuring rod (1) away from the dial indicator fastening base (5). The support column (13) is fixedly connected to the middle position of the top of the upper sleeve (12). The high-hardness alloy side head (8) is fixedly connected to the top of one side of the support column (13). The hand-tightening bolts (14) pass through the lower sleeve (11) and are threadedly connected to the upper sleeve (12).

5. The high-precision measuring device for the external dimensions of a large wind turbine casing according to claim 1, characterized in that: The rigid main measuring rod (1) has a threaded inner hole (15) at one end near the side mounting base (7), and a plug (16) connected to the threaded inner hole (15) is provided at the other end of the rigid main measuring rod (1) near the side mounting base (7).

6. The high-precision measuring device for the external dimensions of a large wind turbine casing according to claim 1, characterized in that: One end of the rigid extension rod 1 (3) and the rigid extension rod 2 (4) are provided with a threaded head (17), and the other end of the rigid extension rod 1 (3) and the rigid extension rod 2 (4) are provided with a threaded inner hole 2 (18).

7. The high-precision measuring device for the external dimensions of a large wind turbine casing according to claim 1, characterized in that: The outer surfaces of the rigid main measuring rod (1), rigid extension rod one (3) and rigid extension rod two (4) are all smooth. The length of the rigid standard calibration rod (2) is 1000mm, the length of the rigid extension rod one (3) is 200mm, and the length of the rigid extension rod two (4) is 300mm.

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