CN115949662B - Manufacturing method of rotating shaft and threading mandrel - Google Patents
Manufacturing method of rotating shaft and threading mandrel Download PDFInfo
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- CN115949662B CN115949662B CN202211527692.6A CN202211527692A CN115949662B CN 115949662 B CN115949662 B CN 115949662B CN 202211527692 A CN202211527692 A CN 202211527692A CN 115949662 B CN115949662 B CN 115949662B
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- pipe body
- pipe
- threading
- mandrel
- rotating shaft
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention discloses a manufacturing method of a rotating shaft and a threading mandrel, wherein the manufacturing method comprises the following steps: the rotary shaft comprises a hollow shaft, wherein a shaft hole is formed in the axial direction of the hollow shaft; the threading mandrel penetrates through the shaft hole and is fixedly connected with the hollow shaft; the threading mandrel is provided with at least two threading holes along the axis direction. The invention can prevent the signal wire penetrating in the rotating shaft from twisting and breaking when rotating at high speed, and resist mutual interference of signals.
Description
Technical Field
The invention relates to the technical field of aero-engine rotating part tests, in particular to a manufacturing method of a rotating shaft and a threading mandrel.
Background
In an aeroengine high-speed rotation test bed, a signal or power line often needs to be arranged in a rotation shaft in a penetrating manner.
In the prior art, the solution to the problem of threading the signal wire on the rotating shaft is not very common, and only a part of solutions under the low-rotation-speed application scene are disclosed, such as a rotating hollow shaft internal threading cable clamping and fixing structure disclosed in the document with the application number of 202122250212.3, a double-shaft connection structure for arranging cables in an inner hole of a motor rotor disclosed in the document with the application number of 201720200804.5, and a cable mandrel of a wind driven generator disclosed in the document with the application number of 201110337897.3. The method is suitable for low-speed rotation application scenes such as wind driven generators and the like. Compared with the high-speed rotation test bed of the aero-engine, the rotation speed between the two is at least two orders of magnitude different. The above document has no great reference value for the problem of the rotation shaft penetrating the signal line applied to the high-speed rotation test stand of the aeroengine. This is mainly due to the fact that when rotating at high speed, for example up to 15000rpm, the intermediate suspended multi-strand signal wire is subjected to a great centrifugal force, which results in knotting and breaking of the signal wire.
How to prevent the signal wire penetrating through the rotating shaft from twisting and breaking when rotating at high speed is one of the important problems to be solved in the art.
Disclosure of Invention
The invention aims to provide a rotating shaft and a threading mandrel manufacturing method, which solve the defects in the prior art, and can prevent signal wires penetrating through the rotating shaft from twisting and breaking when rotating at high speed, and resist mutual interference of signals.
The invention proposes a rotating shaft, wherein: comprising the steps of (a) a step of,
the hollow shaft is provided with a shaft hole along the axis direction;
the threading mandrel penetrates through the shaft hole and is fixedly connected with the hollow shaft; the threading mandrel is provided with at least two threading holes along the axis direction.
A rotating shaft as described above, wherein optionally: the threading mandrel is made of a plurality of pipe fittings which are wrapped with carbon fibers;
the pipe fitting comprises a first pipe body and a second pipe body; the diameter of the first pipe body is larger than that of the second pipe body, the number of the second pipe bodies is multiple, and the second pipe bodies are uniformly distributed around the central line of the first pipe body in the circumferential direction.
A rotating shaft as described above, wherein optionally: the pipe fitting further comprises a third pipe body, wherein the third pipe body is distributed on the periphery of the second pipe body by taking the central line of the first pipe body as the center.
A rotating shaft as described above, wherein optionally: the first pipe body, the second pipe body and the third pipe body are all arranged in parallel.
A rotating shaft as described above, wherein optionally: the outer circumferences of the first pipe body, the second pipe body and the third pipe body are respectively wrapped with carbon fibers.
A rotating shaft as described above, wherein optionally: the first pipe body, the second pipe body and the third pipe body are all metal pipes.
A rotating shaft as described above, wherein optionally: the connecting ring and the flange are also included;
the flange is fixedly arranged on the periphery of the end part of the hollow shaft;
the connecting ring is connected with the periphery of the end part of the threading mandrel, and the connecting ring is connected with the flange through bolts or pins.
A rotating shaft as described above, wherein optionally: the device also comprises a taper sleeve;
the periphery of the end part of the threading mandrel is provided with a shaft shoulder;
the taper sleeve is sleeved on the threading mandrel, and one end with a larger diameter is propped against the shaft shoulder;
the connecting ring is provided with a taper hole, and the taper hole has a shape matched with the outer Zhou Shi of the taper sleeve.
The present disclosure provides a method of manufacturing a threading mandrel, comprising the steps of:
coating glue on the periphery of the metal tube, and wrapping carbon fibers;
arranging a plurality of metal pipes which are wrapped with carbon fibers in a mode that the diameters of the metal pipes are gradually reduced from inside to outside, binding and fixing the metal pipes, and coating glue on the periphery of the metal pipes;
after the glue is solidified, the carbon fiber is wrapped and bonded through the glue, so that a blank is manufactured;
the blank is machined to form a threading mandrel.
The threading mandrel manufacturing method as described above, wherein, optionally, the glue used in each of the steps is a high temperature resistant epoxy resin.
Compared with the prior art, the invention has at least the following beneficial effects:
according to the invention, the plurality of pipe fittings are arranged on the threading mandrel, and each strand of signal wire independently passes through the pipe fittings on the threading mandrel, so that the signal wire is prevented from being twisted and broken; by inserting each strand of signal wire into a pipe member having a proper diameter, the movable space of the signal wire is limited, and the signal wire can be prevented from being thrown away by centrifugal force.
The inner diameters of the pipe fittings with different thicknesses are set according to the number of strands and the thicknesses of different signal wires, so that the requirements of different tests on the number of strands and the thicknesses of the signal wires can be flexibly met.
According to the invention, the first pipe body, the second pipe body and the third pipe body are arranged as metal pipes, and the signal wire, the power wire and the like are arranged in different pipe bodies in a penetrating way, so that the shielding effect can be realized, and the phenomenon of mutual interference of signals is avoided.
Drawings
FIG. 1 is a schematic cross-sectional view of a threading mandrel according to the present invention;
FIG. 2 is a partial cross-sectional view of a rotary shaft according to the present invention;
fig. 3 is a flow chart of the steps of embodiment 2 of the present invention.
Reference numerals illustrate:
the device comprises a hollow shaft 1, a threading mandrel 2, a connecting ring 3, a flange 4 and a taper sleeve 5;
21-first body, 22-second body, 23-third body, 24-shaft shoulder.
Detailed Description
The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In order to solve the problems proposed in the background art, i.e., how to prevent the signal wire penetrating into the rotation shaft from twisting, breaking, and signal interference phenomenon at high rotation speeds, a solution is given below.
Example 1
Referring to fig. 1 and 2, the present embodiment provides a rotary shaft, in which: comprising a hollow shaft 1 and a threading mandrel 2. Namely, the rotating shaft is composed of a hollow shaft 1 and a threading mandrel 2. The hollow shaft 1 is cylindrical, is used for being sleeved on the threading mandrel 2 and is fixedly connected with the threading mandrel 2.
Specifically, the hollow shaft 1 is provided with a shaft hole along the axis direction; that is, in practice, it is preferable that the center line of the shaft hole coincides with the center line of the hollow shaft 1. Compared with the eccentric arrangement of the shaft hole of the hollow shaft 1, the center line of the shaft hole is overlapped with the center line of the hollow shaft 1, which is beneficial to ensuring the dynamic balance of the hollow shaft 1.
The threading mandrel 2 passes through the shaft hole and is fixedly connected with the hollow shaft 1; in specific implementation, the threading mandrel 2 and the hollow shaft 1 can be in interference fit connection, or can be fixedly connected through other components. Specifically, in order to solve the problem of preventing the signal wire from being knotted and broken, in this embodiment, the threading mandrel 2 has at least two threading holes along the axis direction; the threading mandrel 2 is made of a plurality of tubes surrounding carbon fibers. The threading holes are formed in at least two, so that different signal wires can be conveniently and respectively penetrated through the corresponding threading holes, the phenomenon that the signal wires or the power wires are twisted under the condition of rotating along with the rotating shaft at a high speed can be avoided, and the signal wires can be prevented from being broken by pulling.
When the wire threading device is used, the signal wires or the power wires with different thicknesses are threaded through the corresponding threading holes, and the diameter of the threading holes is equal to or slightly larger than the thickness of the signal wires or the power wires to be threaded. The movable space of each signal wire or power wire is limited, and the signal wire or power wire is prevented from being thrown off by centrifugal force.
Specifically, in order to meet the requirement for the diameter of the threading hole, the pipe member includes a first pipe body 21 and a second pipe body 22. In specific implementation, the inner holes of the first pipe body 21 and the second pipe body 22 are threading holes. The diameter of the first pipe body 21 is larger than that of the second pipe body 22, the number of the second pipe bodies 22 is a plurality of the second pipe bodies 22, and the plurality of the second pipe bodies 22 are uniformly distributed around the central line of the first pipe body 21 in the circumferential direction. That is, when in use, the adjacent second tubes 22 are tangent to each other, and the second tubes 22 are tangent to the first tubes 21. Through arranging the second pipe body 22 and the first pipe body 21, the center of mass of the threading mandrel 2 can be located on the axis of the threading mandrel, and dynamic balance during rotation is guaranteed. Further, in use, when the number of the threaded second tubes 22 is smaller than the total number of the second tubes 22, the signal lines should be ensured to be uniformly distributed in the circumferential direction of the threading mandrel 2 as much as possible.
In practice, the shape, size and material of any two second tubes 22 are the same.
Of course, in some embodiments, the number of the first tubes 21 may be plural, for example, three, and the first tubes 21 should be tangent to each other two by two, so that the center line of each first tube 21 is located on a cylindrical surface, and the plural first tubes 21 are uniformly distributed along the peripheral direction of the cylindrical surface. When the number of the first tubes 21 is plural, three or four are preferable.
In this embodiment, the number of the first tubes 21 is preferably 1, and the tube member further includes a third tube body 23 according to the types and the number of the signal lines, wherein the third tube body 23 is distributed around the center line of the first tube body 21 as the center on the outer periphery of the second tube body 22. In practice, the third tubular body 23, which is the outermost layer, can be tangent to a cylindrical surface centered on the first tubular body 21.
In a preferred implementation, the first pipe 21, the second pipe 22 and the third pipe 23 are all disposed in parallel. Thus, the realization of dynamic balance is facilitated.
In order to ensure the strength of the threading mandrel, the outer circumferences of the first tube body 21, the second tube body 22 and the third tube body 23 are respectively wrapped with carbon fibers. In practice, the carbon fiber is fixed by glue to form a part of the threading mandrel 2. In this way, it is advantageous to increase its size in order to facilitate the machining of the desired profile shape.
In order to avoid mutual signal interference of the signal lines, especially interference between strong current and weak current, the first pipe body 21, the second pipe body 22 and the third pipe body 23 are all metal pipes. Namely, the first tube 21, the second tube 22 and the third tube 23 can all play three roles, namely, separate different signal lines or power lines and limit the movable space of the signal lines or the power lines therein; secondly, the carbon fiber is convenient to wrap, thirdly, signals are shielded, mutual interference of the signals is prevented, and particularly interference between strong current and weak current is prevented.
In specific implementation, the glue used is high-temperature-resistant epoxy resin, and specifically, high-temperature-resistant epoxy resin with temperature resistance higher than 250 ℃ can be selected. To avoid the influence of high temperature on the signal line.
In practical implementation, referring to fig. 2, in order to achieve the fixed connection between the threading mandrel 2 and the hollow shaft 1, the embodiment further includes a connecting ring 3 and a flange 4. The flange 4 is fixedly arranged on the periphery of the end part of the hollow shaft 1.
The connecting ring 3 is connected with the periphery of the end part of the threading mandrel 2, and the connecting ring 3 is connected with the flange 4 through bolts or pins. Specifically, the outer diameter of the connecting ring 3 is larger than the diameter of the shaft hole and smaller than the outer diameter of the flange 4, and the inner diameter of the connecting ring 3 is smaller than the diameter of the shaft hole.
More specifically, the taper sleeve 5 is also included; the periphery of the taper sleeve 5 is provided with a conical surface. A shoulder 24 is arranged on the periphery of the end part of the threading mandrel 2; the taper sleeve 5 is sleeved on the threading mandrel 2, and one end with a larger diameter is abutted against the shaft shoulder 24; that is, the diameter of the taper sleeve 5 gradually decreases in a direction away from the shoulder 24. The connecting ring 3 is provided with a taper hole, and the taper hole is provided with a shape matched with the periphery of the taper sleeve 5. That is, the tapered hole in the connecting ring 3 is gradually increased in diameter in a direction toward the shoulder 24.
During installation, the threading mandrel 21 is inserted into the hollow shaft 1, the shaft shoulder 24 is positioned in the shaft hole, the taper sleeve 5 is sleeved at the end part of the threading mandrel 2, the large-diameter end of the taper sleeve 5 abuts against the shaft shoulder 24, the connecting ring 3 is sleeved, and the connecting ring is connected with the flange 4 through bolts. With the screwing of the bolts, the connecting ring 3 and the taper sleeve 5 are continuously abutted to achieve the purpose of automatic expansion, and the structures of the two ends of the rotating shaft are the same when the automatic expansion device is implemented.
Example 2
Referring to fig. 3, the present embodiment provides a method for manufacturing a threading mandrel disclosed in embodiment 1, wherein reference is made to embodiment 1 for the function and effect of the threading mandrel, and the description is not repeated here. The embodiment comprises the following steps:
s1, coating glue on the periphery of a metal tube, and wrapping carbon fibers; specifically, when the number of the metal pipes is a plurality of sizes, a proper amount of glue is respectively coated on the metal pipes with the plurality of sizes.
S2, arranging a plurality of metal tubes which are wrapped with carbon fibers in a mode that the diameters of the metal tubes are gradually reduced from inside to outside, binding and fixing the metal tubes, and coating glue on the periphery of the metal tubes; specifically, winding a proper amount of carbon fibers to bind and fix the coarsest metal tube, sequentially arranging a second coarse metal tube on the periphery, winding a proper amount of carbon fibers to bind and fix the metal tube, curing glue, finally winding a proper amount of carbon fibers on the finest metal tube, binding and fixing the metal tube, and curing the glue.
S3, after the glue is solidified, the carbon fibers are wrapped and bonded through the glue, so that a blank is manufactured. Specifically, the carbon fiber tube and the glue are solidified and shaped, then the carbon fiber is wound, and the glue is solidified after the size of the part reaches the size required by the process. To complete the manufacture of the blank.
S4, machining the blank to form the threading mandrel. Including machining the circumferential surface of the blank, machining the shoulder as in example 1, and the like.
In the implementation, in order to ensure the high temperature resistance of the processed threading mandrel, the glue used in each step is high temperature resistant epoxy resin.
By way of example 1 and example 2 above, the present invention has at least the following beneficial effects:
according to the invention, the plurality of pipe fittings are arranged on the threading mandrel, and each strand of signal wire independently passes through the pipe fittings on the threading mandrel, so that the signal wire is prevented from being twisted and broken; by inserting each strand of signal wire into a pipe member having a proper diameter, the movable space of the signal wire is limited, and the signal wire can be prevented from being thrown away by centrifugal force.
The inner diameters of the pipe fittings with different thicknesses are required to be set according to the number of strands and the thickness of different signal wires, so that the requirements of different tests on the number of strands and the thickness of the signal wires can be flexibly met.
According to the invention, the first pipe body, the second pipe body and the third pipe body are arranged as metal pipes, and the signal wire, the power wire and the like are arranged in different pipe bodies in a penetrating way, so that the shielding effect can be realized, and the phenomenon of mutual signal interference is avoided.
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (5)
1. A rotating shaft, characterized in that: comprising the steps of (a) a step of,
the hollow shaft (1) is provided with a shaft hole along the axis direction;
the threading mandrel (2) passes through the shaft hole and is fixedly connected with the hollow shaft (1); the threading mandrel (2) is provided with at least two threading holes along the axis direction;
the threading mandrel (2) is made of a plurality of pipe fittings which are wrapped by carbon fibers;
the pipe fitting comprises a first pipe body (21) and a second pipe body (22); the diameter of the first pipe body (21) is larger than that of the second pipe bodies (22), the number of the second pipe bodies (22) is multiple, and the second pipe bodies (22) are uniformly distributed around the central line of the first pipe body (21) in the circumferential direction;
the connecting ring (3) and the flange (4) are also included;
the flange (4) is fixedly arranged on the periphery of the end part of the hollow shaft (1);
the connecting ring (3) is connected with the periphery of the end part of the threading mandrel (2), and the connecting ring (3) is connected with the flange (4) through bolts or pins;
a shoulder (24) is arranged on the periphery of the end part of the threading mandrel (2);
the utility model also comprises a taper sleeve (5);
the taper sleeve (5) is sleeved on the threading mandrel (2), and one end with a larger diameter is propped against the shaft shoulder (24);
the connecting ring (3) is provided with a taper hole, and the taper hole has a shape matched with the outer Zhou Shi of the taper sleeve (5).
2. The rotating shaft according to claim 1, characterized in that: the pipe fitting further comprises a third pipe body (23), and the third pipe body (23) is distributed on the periphery of the second pipe body (22) by taking the central line of the first pipe body (21) as the center.
3. The rotating shaft according to claim 2, characterized in that: the first pipe body (21), the second pipe body (22) and the third pipe body (23) are all arranged in parallel.
4. The rotating shaft according to claim 2, characterized in that: the outer circumferences of the first tube body (21), the second tube body (22) and the third tube body (23) are respectively wrapped with carbon fibers.
5. The rotating shaft according to claim 3 or 4, characterized in that: the first pipe body (21), the second pipe body (22) and the third pipe body (23) are all metal pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211527692.6A CN115949662B (en) | 2022-11-29 | 2022-11-29 | Manufacturing method of rotating shaft and threading mandrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211527692.6A CN115949662B (en) | 2022-11-29 | 2022-11-29 | Manufacturing method of rotating shaft and threading mandrel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115949662A CN115949662A (en) | 2023-04-11 |
| CN115949662B true CN115949662B (en) | 2023-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211527692.6A Active CN115949662B (en) | 2022-11-29 | 2022-11-29 | Manufacturing method of rotating shaft and threading mandrel |
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| CN115949662A (en) | 2023-04-11 |
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