A high speed rotor surface optical fiber layup construction and method

Abstract

The application relates to the technical field of rotor testing, and particularly discloses a high-speed rotor surface optical fiber laying structure and method, which comprises a transfer support installed at the shaft head end of a rotor and coaxially arranged, and an optical fiber slip ring installed on the transfer support and having one end penetrating through the transfer support and extending into the shaft head end; a T-shaped hole matched with the optical fiber is arranged in the shaft head end, the T-shaped hole comprises an axial hole coaxially arranged with the rotor and a radial hole arranged on the rotor and in communication with the axial hole away from one end of the optical fiber slip ring; an avoiding groove for installing the optical fiber is arranged on the hub surface of the rotor; the transfer support is installed on the side of the axial hole away from the radial hole; and the optical fiber slip ring is coaxially arranged with the axial hole. The application effectively avoids the risk of optical fiber breakage when the rotor rotates, and makes the optical fiber have good stability and durability.

Description

Technical Field

[0001] This invention relates to the field of rotor testing technology, and more specifically, to a structure and method for laying optical fibers on the surface of a high-speed rotor. Background Technology

[0002] In high-speed rotating machinery, the rotor is a core component, and monitoring its operating status is crucial. However, due to factors such as centrifugal force, high temperature environment, vibration, and stator cutting generated by the high speed of rotor rotation, coupled with the high brittleness of optical fibers, the optical fibers are prone to breakage when monitored as the rotor rotates. Conventional optical fiber laying methods cannot guarantee the stability and durability of the optical fibers. Summary of the Invention

[0003] The technical problem to be solved by this invention is to provide a structure and method for laying optical fibers on the surface of a high-speed rotor, which can effectively avoid the risk of optical fiber breakage and make the optical fiber have good stability and durability; The solution adopted by this invention to solve the technical problem is: on the one hand: A high-speed rotor surface fiber laying structure includes an adapter bracket installed on the shaft end of the rotor and coaxially arranged, and an optical fiber slip ring installed on the adapter bracket and having one end pass through the adapter bracket and extend into the shaft end. A T-shaped hole for use with optical fiber is provided inside the shaft head end. The T-shaped hole includes an axial hole coaxial with the rotor and a radial hole provided on the rotor and communicating with the end of the axial hole away from the optical fiber slip ring. A clearance groove for installing optical fiber is provided on the hub surface of the rotor. The adapter bracket is installed on the side of the axial hole away from the radial hole; the fiber optic slip ring is coaxially arranged with the axial hole.

[0004] In some possible implementations, the clearance grooves are in multiple sets and arranged sequentially along the axial direction of the shaft, and an adhesive for bonding optical fibers is disposed within the clearance grooves.

[0005] In some possible implementations, the width of the clearance groove is 1mm-5mm, and the depth of the clearance groove is 1.5-3mm.

[0006] In some possible implementations, one end of the optical fiber passes sequentially through an optical fiber slip ring, an axial hole, and a radial hole; the measurement grating segment of the optical fiber is set in a one-to-one correspondence with the measurement of the blades on the rotor; the T-shaped hole is filled with foam to fix the optical fiber; the tensile strength of the foam is ≥0.17MPa.

[0007] In some possible implementations, the adapter bracket includes a flange coaxially arranged and connected to the shaft end, a sleeve mounted on the flange and coaxially arranged with the flange, and a positioning end cap disposed on the side of the sleeve away from the flange; the positioning end cap is provided with a positioning hole coaxially connected to the sleeve and used for positioning the fiber optic slip ring. One end of the fiber optic slip ring passes through the positioning hole, sleeve, and flange in sequence and extends into the shaft end.

[0008] In some possible embodiments, a through hole communicating with an axial hole is provided on the sleeve and along its radial direction; a thin tube is provided in the through hole, one end of which extends into the axial hole away from the adapter bracket and is used for conveying foam adhesive, and the other end of the thin tube is located outside the adapter bracket.

[0009] In some possible implementations, the radial hole includes a connecting section communicating with the axial hole, and a sealing section coaxially disposed with the connecting section and located at the end of the connecting section away from the axial hole.

[0010] In some possible implementations, an internal thread is provided within the sealing section, and a sealing adhesive is provided within the sealing section.

[0011] on the other hand: A method for laying optical fibers on the surface of a high-speed rotor, based on the above-described structure for laying optical fibers on the surface of a high-speed rotor, specifically includes the following steps: Step S1: Fiber optic installation; pass one end of the fiber optic cable through the axial hole and radial hole in sequence, then through each stage of blades on the rotor and lay it in the clearance slot along the rotor axis; wherein, the measuring grating segment of the fiber optic cable is set one-to-one with the blade. Step S2: Fix the optical fiber; Step S3: Clean and seal the end of the radial hole away from the axial hole with sealing glue.

[0012] In some possible implementations, step S2 specifically refers to: The optical fiber is bonded to the clearance slot and the blade using adhesive. The optical fiber inside the T-hole is fixed using expanding foam and a thin tube, specifically including the following steps: Step L1: Pass one end of the thin tube through the adapter bracket and insert it into the axial hole near the radial hole; Step L2: Connect the glue container with expanding foam to the other end of the thin tube; Step L3: Glue application; When applying glue, after the radial hole is filled with expanding foam, slowly pull the thin tube outward until the axial hole is filled with expanding foam.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention effectively avoids the risk of optical fiber breakage caused by rotor rotation during testing by using a combination of clearance groove, adhesive, T-hole, foam, and sealing adhesive, thus giving the optical fiber good stability and durability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram illustrating the use of the present invention for fiber optic cable laying; Figure 2 This is a partial schematic diagram of the clearance groove, optical fiber, and rotor in this invention; Figure 3 This is a schematic diagram of the conversion bracket in this invention; Figure 4 This is a schematic diagram of the structure of the adapter bracket in this invention; Figure 5 This is a cross-sectional view of the adapter bracket in this invention; Figure 6 This is a schematic diagram of the structure of the radial hole, axial hole, adapter bracket, and fiber optic slip ring of the present invention; Figure 7 for Figure 6 Enlarged view of point A in the middle; Figure 8 This is a schematic diagram of the laying of optical fiber in the T-shaped hole in this invention; in: 1. Rotor; 11. Shaft end; 111. Axial hole; 112. Radial hole; 12. Clearance groove; 2. Leaves; 3. Adapter bracket; 31. Flange; 32. Sleeve; 321. Through hole; 33. Positioning end cap; 34. Positioning boss; 4. Fiber optic slip ring; 100. Fiber optic cable. Detailed Implementation

[0015] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, "a" or "one," etc., do not indicate a quantity limitation, but rather indicate the existence of at least one. In the implementation of this application, "and / or" describes the association relationship of related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more. For example, multiple positioning posts refer to two or more positioning posts. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0016] The present invention will now be described in detail.

[0017] on the one hand: like Figures 1-8 As shown: A high-speed rotor 1 surface fiber 100 laying structure includes an adapter bracket 3 installed on the shaft end 11 of the rotor 1 and coaxially arranged, and an optical fiber slip ring 4 installed on the adapter bracket 3 and having one end pass through the adapter bracket 3 and extend into the shaft end 11. A T-shaped hole for use with optical fiber 100 is provided in the shaft end 11. The T-shaped hole includes an axial hole 111 coaxially arranged with rotor 1 and a radial hole 112 arranged on rotor 1 and communicating with the end of axial hole 111 away from optical fiber slip ring 4. A clearance groove 12 for installing optical fiber 100 is provided on the hub surface of rotor 1. The adapter bracket 3 is installed on the side of the axial hole 111 away from the radial hole 112; the fiber optic slip ring 4 is coaxially arranged with the axial hole 111. The clearance groove 12 is in multiple sets and arranged sequentially along the axial direction of the rotating shaft, and an adhesive for bonding the fiber optic cable 100 is placed in the clearance groove 12; preferably, the adhesive is a high-temperature ceramic adhesive.

[0018] The present invention employs a T-shaped hole and a clearance groove 12 to ensure that the optical fiber 100 is stably fixed on the rotor 1, thus preventing the optical fiber 100 from falling off and being damaged under the high-speed rotation of the rotor 1. At the same time, by filling the clearance groove 12 with adhesive, the clearance groove 12 is filled and the optical fiber 100 is bonded and fixed to the outer side of the rotor 1 hub surface and will not be cut by the stator blade 2.

[0019] Specifically, the clearance groove 12 is located along the axial direction of the rotor 1 on the hub surface of the rotor 1 where a clearance is required with the stator, along the path of the optical fiber 100, and can be processed and polished to meet the usage requirements. The T-hole design allows for the laying of two sets of optical fibers, so that even if one set of fibers fails, the other set can serve as a backup.

[0020] In some possible implementations, the width of the clearance groove 12 is 1mm-5mm and the depth of the clearance groove 12 is 1.5-3mm. This arrangement allows the optical fiber 100 to be entirely contained within the clearance groove 12 and encased in the adhesive filling the clearance groove 12, further preventing the stator blade 2 from cutting the optical fiber 100.

[0021] In some possible implementations, one end of the optical fiber 100 passes sequentially through the optical fiber slip ring 4, the axial hole 111, and the radial hole 112; the measuring grating segment of the optical fiber 100 is set in a one-to-one correspondence with the measuring section of the blade 2 on the rotor 1; the T-shaped hole is filled with foam to fix the optical fiber 100; the tensile strength of the foam is ≥0.17MPa. Preferably, the foam is a fire-resistant polyurethane foam; by filling the T-shaped hole with foam, the possibility of the optical fiber 100 breaking under centrifugal force when the rotor 1 rotates is avoided.

[0022] In some possible implementations, the adapter bracket 3 includes a flange 31 coaxially arranged and connected to the shaft end 11, a sleeve 32 mounted on the flange 31 and coaxially arranged with the flange 31, and a positioning end cap 33 disposed on the side of the sleeve 32 away from the flange 31; the positioning end cap 33 is provided with a positioning hole coaxially connected to the sleeve 32 and used for positioning the fiber optic slip ring 4. Specifically, a mounting hole is provided at the shaft end 11 of the rotor 1, which is coaxial with and communicates with the axial direction; a positioning boss 34 is provided on the flange 31 and installed in the mounting hole; the flange 31 and the shaft end 11 are connected and fixed by bolts; the positioning hole provided on the positioning end cover 33 is used to position the fiber optic slip ring 4 so that it is coaxial with the axial hole 111, and the two are connected by bolts. One end of the fiber optic slip ring 4 passes through the positioning hole, sleeve 32, and flange 31 in sequence and extends into the shaft end 11.

[0023] In some possible implementations, to avoid filling the T-holes with expanding foam, A through hole 321 communicating with the axial hole 111 is provided on the sleeve 32 and along its radial direction; a thin tube is provided in the through hole 321, one end of which extends into the axial hole 111 away from the adapter bracket 3 and is used for conveying foam adhesive, and the other end of the thin tube is located outside the adapter bracket 3.

[0024] Specifically, after the fiber optic cable 100 is installed, one end of the thin tube passes through the axial hole 111 and extends into one side of the radial hole 112. Then, the glue can containing expanding foam is connected to the other end of the thin tube to realize the expanding foam application operation. During the glue application process, after the radial hole 112 is filled with expanding foam, the thin tube is slowly moved outward to apply glue to the axial hole 111. When the thin tube is removed from the through hole 321, the axial hole 111 is filled with expanding foam. By applying glue to the T-shaped hole, the portion of the optical fiber 100 located inside the T-shaped hole is effectively protected.

[0025] In some possible implementations, in order to achieve the sealing of the radial hole 112, the radial hole 112 includes a connecting section communicating with the axial hole 111, and a sealing section coaxially arranged with the connecting section and located at the end of the connecting section away from the axial hole 111. Specifically, when applying the expanding foam, it is sufficient to cover the connecting section. After the expanding foam cures, it forms a robust structure that resists centrifugal force and ensures the stability of the optical fiber 100. The sealing section is sealed with sealing adhesive at the end. The sealing section is provided with internal threads, which effectively increases the friction between the sealing adhesive and the sealing section, preventing the sealing adhesive from being thrown out under centrifugal force when the rotor 1 rotates, thus avoiding the optical fiber 100 from breaking.

[0026] Specifically, the sealing adhesive is a high-temperature AB adhesive or other types of resin adhesive.

[0027] Furthermore, the diameters of the axial hole 111 and the radial hole 112 are 15mm-40mm, and the diameter of the through hole 321 is 3mm-8mm.

[0028] Furthermore, the radial hole 112 is a radial through hole, which allows for the laying of two sets of optical fibers 100.

[0029] on the other hand: A method for laying optical fiber 100 on the surface of a high-speed rotor 1, based on the above-described structure for laying optical fiber 100 on the surface of a high-speed rotor 1, specifically includes the following steps: Step S1: Install fiber optic cable 100; pass one end of fiber optic cable 100 through axial hole 111 and radial hole 112 in sequence, and then through each stage of blades 2 on rotor 1 and lay it in clearance groove 12 along the axis of rotor 1; wherein, the measuring grating segment of fiber optic cable 100 is set one-to-one with blade 2. Specifically, the blades 2 on the rotor 1 are arranged in multiple stages, and the multi-stage blades 2 are arranged sequentially along the axial direction of the shaft. When the optical fiber 100 is installed, the optical fiber 100 enters the rotor 1 from the axial hole 111 at the shaft end 11, and exits from the radial hole 112 provided in front of the first-stage blade 2. Then it is attached to the relief groove 12 on the hub surface and the surface of each stage blade 2 along the axis.

[0030] Step S2: Fixing fiber optic cable 100; specifically, this means: The optical fiber 100 is bonded to the clearance groove 12 and the blade 2 using adhesive. The optical fiber 100 inside the T-hole is fixed using expanding foam and a thin tube, specifically including the following steps: Step L1: Pass one end of the thin tube through the adapter bracket 3 and insert it into the axial hole 111 near the radial hole 112; Step L2: Connect the glue container with expanding foam to the other end of the thin tube; Step L3: Glue application; When applying glue, after the radial hole 112 is filled with expanding foam, slowly pull the thin tube outward to make the expanding foam evenly and not easily damage the optical fiber 100, until the axial hole 111 is filled with expanding foam, and the glue application is completed.

[0031] Step S3: Clean and seal the end of the radial hole 112 away from the axial hole 111 with sealing glue.

[0032] This invention is not limited to the specific embodiments described above. The invention extends to any new feature or combination disclosed in this specification, as well as any new method or process step or combination disclosed herein.

Claims

1. A high-speed rotor surface optical fiber laying structure, characterized in that, It includes an adapter bracket installed on the shaft end of the rotor and coaxially arranged, and an optical fiber slip ring installed on the adapter bracket with one end passing through the adapter bracket and extending into the shaft end; A T-shaped hole for use with optical fiber is provided inside the shaft head end. The T-shaped hole includes an axial hole coaxial with the rotor and a radial hole provided on the rotor and communicating with the end of the axial hole away from the optical fiber slip ring. A clearance groove for installing optical fiber is provided on the hub surface of the rotor. The adapter bracket is installed on the side of the axial hole away from the radial hole; the fiber optic slip ring is coaxially arranged with the axial hole.

2. The high-speed rotor surface optical fiber laying structure according to claim 1, characterized in that, The clearance grooves are in multiple sets and are arranged sequentially along the axial direction of the rotating shaft. Adhesive for bonding optical fibers is placed in the clearance grooves.

3. The high-speed rotor surface optical fiber laying structure according to claim 1, characterized in that, The width of the clearance groove is 1mm-5mm, and the depth of the clearance groove is 1.5-3mm.

4. The high-speed rotor surface optical fiber laying structure according to claim 1, characterized in that, One end of the optical fiber passes through the optical fiber slip ring, axial hole, and radial hole in sequence; the measurement grating segment of the optical fiber is set in a one-to-one correspondence with the measurement of the blade on the rotor; the T-shaped hole is filled with foam to fix the optical fiber; the tensile strength of the foam is ≥0.17MPa.

5. The high-speed rotor surface optical fiber laying structure according to claim 1, characterized in that, The adapter bracket includes a flange coaxially arranged and connected to the shaft end, a sleeve mounted on the flange and coaxially arranged with the flange, and a positioning end cover disposed on the side of the sleeve away from the flange. The positioning end cap is provided with a positioning hole that is coaxially connected to the sleeve and used for positioning the fiber optic slip ring. One end of the fiber optic slip ring passes through the positioning hole, sleeve, and flange in sequence and extends into the shaft end.

6. The optical fiber laying structure on the surface of a high-speed rotor according to claim 5, characterized in that, A through hole communicating with an axial hole is provided on the sleeve and along its radial direction; a thin tube is provided in the through hole, one end of which extends into the axial hole away from the adapter bracket and is used for conveying foam adhesive, and the other end of the thin tube is located outside the adapter bracket.

7. The optical fiber laying structure on the surface of a high-speed rotor according to claim 1, characterized in that, The radial hole includes a connecting section communicating with the axial hole, and a sealing section coaxially arranged with the connecting section and located at the end of the connecting section away from the axial hole.

8. The optical fiber laying structure on the surface of a high-speed rotor according to claim 7, characterized in that, An internal thread is provided within the sealing section, and sealing adhesive is provided within the sealing section.

9. A method for laying optical fibers on the surface of a high-speed rotor, characterized in that, The high-speed rotor surface fiber optic laying structure according to any one of claims 1-8 specifically includes the following steps: Step S1: Fiber optic installation; pass one end of the fiber optic cable through the axial hole and radial hole in sequence, then through each stage of blades on the rotor and lay it in the clearance slot along the rotor axis; wherein, the measuring grating segment of the fiber optic cable is set one-to-one with the blade. Step S2: Fix the optical fiber; Step S3: Clean and seal the end of the radial hole away from the axial hole with sealing glue.

10. The method for laying optical fibers on the surface of a high-speed rotor according to claim 9, characterized in that, Step S2 specifically refers to: The optical fiber is bonded to the clearance slot and the blade using adhesive. The optical fiber inside the T-hole is fixed using expanding foam and a thin tube, specifically including the following steps: Step L1: Pass one end of the thin tube through the adapter bracket and insert it into the axial hole near the radial hole; Step L2: Connect the glue container with expanding foam to the other end of the thin tube; Step L3: Glue application; When applying glue, after the radial hole is filled with expanding foam, slowly pull the thin tube outward until the axial hole is filled with expanding foam.

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