CN115949662A - Manufacturing method of rotating shaft and threading mandrel - Google Patents
Manufacturing method of rotating shaft and threading mandrel Download PDFInfo
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- CN115949662A CN115949662A CN202211527692.6A CN202211527692A CN115949662A CN 115949662 A CN115949662 A CN 115949662A CN 202211527692 A CN202211527692 A CN 202211527692A CN 115949662 A CN115949662 A CN 115949662A
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- pipe body
- rotating shaft
- threading
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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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Abstract
The invention discloses a method for manufacturing a rotating shaft and a threading mandrel, wherein the method comprises the following steps: the rotating shaft comprises a hollow shaft, a shaft hole is arranged 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. The invention can prevent the signal wires penetrating through the rotating shaft from being twisted and broken when rotating at high speed and resist signal mutual interference.
Description
Technical Field
The invention relates to the technical field of test of rotary parts of aero-engines, in particular to a method for manufacturing a rotary shaft and a threading mandrel.
Background
On an aircraft engine high-speed rotation test bed, a signal or a power line is required to be arranged in a rotating shaft in a penetrating mode.
In the prior art, solutions for signal line threading of a rotating shaft are rare, and only some solutions are disclosed in a low-rotation-speed application scene, such as a rotating hollow shaft internal cable-threading clamping and fixing structure disclosed in a patent No. 202122250212.3, a motor rotor internal hole arrangement cable biaxial connection structure disclosed in a patent No. 201720200804.5, and a wind turbine generator cable mandrel disclosed in a patent No. 201110337897.3. The method is suitable for low-speed rotation application scenes of wind driven generators and the like. Compared with an aero-engine high-speed rotation test bed, the rotating speed difference between the two is at least two orders of magnitude. The above documents do not have much reference value for the problem that the rotating shaft applied to the high-speed rotating test bed of the aircraft engine penetrates through the signal wire. This is mainly because when the rotating speed is high, for example, up to 15000rpm, the multi-strand signal wire suspended in the middle will be subjected to great centrifugal force, resulting in knotting and breaking of the signal wire.
How to prevent the signal wires penetrating through the rotating shaft from being twisted and broken during high-speed rotation is one of the important problems to be solved urgently in the field.
Disclosure of Invention
The invention aims to provide a method for manufacturing a rotating shaft and a threading mandrel, which can solve the defects in the prior art and can prevent signal wires which are threaded in the rotating shaft from being twisted and broken when rotating at high speed and prevent mutual interference of signals.
The invention proposes a rotating shaft, wherein: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
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.
The rotating shaft as described above, wherein, optionally: the threading mandrel is made of a plurality of tubes wrapped with carbon fibers;
the pipe fitting comprises a first pipe body and a second pipe body;
the diameter of first body is greater than the second body, the quantity of second body is a plurality of, and is a plurality of the second body is around the central line of first body is at the circumferencial direction evenly distributed.
The rotating shaft as described above, wherein, optionally: the pipe fitting still includes the third body, the third body use the central line of first body distribute as the center in the periphery of second body.
The rotating shaft as described above, wherein, optionally: the first pipe body, the second pipe body and the third pipe body are arranged in parallel.
The rotating shaft as described above, wherein, optionally: the peripheries of the first pipe body, the second pipe body and the third pipe body are respectively wrapped with carbon fibers.
The rotating shaft as described above, wherein, optionally: the first pipe body, the second pipe body and the third pipe body are all metal pipes.
The rotating shaft as described above, wherein, optionally: the device also comprises a connecting ring and a flange;
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 cable penetrating core shaft, and the connecting ring is connected with the flange through bolts or pins.
The rotating shaft as described above, wherein, optionally: the device also comprises a taper sleeve;
a shaft shoulder is arranged on the periphery of the end part of the cable core penetrating shaft;
the taper sleeve is sleeved on the threading mandrel, and one end with a larger diameter abuts against the shaft shoulder;
the connecting ring is provided with a taper hole, and the taper hole has a shape matched with the periphery of the taper sleeve.
The disclosure provides a method for manufacturing a threading mandrel, which comprises the following steps:
coating glue on the periphery of the metal pipe, and wrapping the carbon fiber;
arranging a plurality of metal pipes wrapping the 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 adding glue Zhou Tufu outside;
wrapping the carbon fiber after the glue is cured and bonding the carbon fiber by the glue to prepare a blank;
the blank is machined to form a threading mandrel.
The method of manufacturing a threading mandrel as described above, wherein optionally the glue used in each of the steps is a high temperature resistant epoxy.
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 signal wire independently passes through the pipe fitting on the threading mandrel, so that the signal wires are prevented from being twisted and pulled apart; through wear to establish in the pipe fitting of suitable diameter with each signal line, make the activity space of signal line restricted, can prevent that the signal line can not get rid of absolutely by centrifugal force.
The inner diameters of the pipe fittings with different thicknesses are 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 tube body, the second tube body and the third tube body are arranged to be metal tubes, and the signal lines and the power lines are equally arranged in different tube bodies in a penetrating manner, so that a 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 invention;
fig. 2 is a partial sectional view of a rotary shaft according to the present invention;
FIG. 3 is a flowchart showing the steps of embodiment 2 of the present invention.
Description of the reference numerals:
1-hollow shaft, 2-threading mandrel, 3-connecting ring, 4-flange and 5-taper sleeve;
21-first tube, 22-second tube, 23-third tube, 24-shoulder.
Detailed Description
The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
In order to solve the problems proposed in the background art, i.e., how to prevent the signal lines penetrating through the rotating shaft from twisting and breaking at high rotating speed and signal interference phenomena, the following solutions are provided.
Example 1
Referring to fig. 1 and fig. 2, the present embodiment provides a rotating shaft, wherein: comprises a hollow shaft 1 and a threading mandrel 2. That is, the rotation shaft is composed of two parts, a hollow shaft 1 and a threading mandrel 2. The hollow shaft 1 is cylindrical and is used for being sleeved on the threading mandrel 2 and 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, the center line of the shaft hole and the center line of the hollow shaft 1 are preferably coincident with each other. Compare in the eccentric setting in shaft hole of hollow shaft 1, coincide the central line in shaft hole and hollow shaft 1, be favorable to guaranteeing the dynamic balance of hollow shaft 1.
The threading mandrel 2 penetrates through the shaft hole and is fixedly connected with the hollow shaft 1; during specific implementation, the threading mandrel 2 and the hollow shaft 1 can be connected in an interference fit manner, and can also be fixedly connected through other parts. Specifically, in order to solve the problem of preventing the signal line from knotting and breaking, in this embodiment, the threading mandrel 2 has at least two threading holes along the axial direction; the threading mandrel 2 is made of a number of tubes wrapped around carbon fibres. Set up the through wires hole into at least two, be convenient for pass the signal line of difference respectively, through passing the through wires hole that corresponds with the signal line alone, can avoid taking place the phenomenon of kink at signal line or power cord under the high-speed pivoted condition along with the rotation axis, can be favorable to avoiding the signal line to be broken.
When the cable is used, signal wires or power wires with different thicknesses are passed through the corresponding threading holes, and the diameters of the threading holes are equal to or slightly larger than the thicknesses of the signal wires or the power wires to be passed through. The moving space of each signal wire or power line is limited, and the signal wires or the power lines are prevented from being thrown off by centrifugal force.
Specifically, in order to satisfy 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 tube 21 and the second tube 22 are threading holes. The diameter of the first pipe 21 is greater than that of the second pipes 22, the number of the second pipes 22 is plural, and the plural second pipes 22 are uniformly distributed in the circumferential direction around the center line of the first pipe 21. That is, when the carbon fiber-wrapped first pipe 21 is used, the adjacent carbon fiber-wrapped second pipes 22 are tangent to each other, and the carbon fiber-wrapped second pipes 22 are tangent to each other. Through arranging between second body 22 and first body 21, can make the barycenter of threading dabber 2 be located its axis, be favorable to guaranteeing the dynamic balance when rotatory. Furthermore, when the number of threaded second tubes 22 is less than the total number of second tubes 22, it is desirable to ensure that the signal wires are evenly distributed in the circumferential direction of the threading mandrel 2.
In specific implementation, any two second tubes 22 have the same shape, size and material.
Of course, in some embodiments, the number of the first tubes 21 may be multiple, such as three, two or two of the first tubes 21 should be tangent to each other, so that the center line of each first tube 21 is located on a cylindrical surface, and the plurality of first tubes 21 are uniformly distributed along the outer circumference 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 tube 21 is preferably 1, and according to the difference between the types and the numbers of the signal lines, in this embodiment, the pipe further includes a third tube 23, and the third tube 23 is distributed around the periphery of the second tube 22 by taking the center line of the first tube 21 as the center. In practice, the outermost third tubes 23 can be tangent to a cylindrical surface that is the centerline of the first tube 21.
In a preferred implementation, the first tube 21, the second tube 22 and the third tube 23 are all arranged in parallel. Thus, the dynamic balance is realized.
In order to ensure the strength of the threading mandrel, the outer peripheries of the first tube 21, the second tube 22 and the third tube 23 are respectively wrapped with carbon fiber. In specific implementation, the carbon fiber is wound and fixed by glue to form a part of the threading mandrel 2. Thus, the size of the tool is increased, and the required outline shape can be machined conveniently.
In order to avoid mutual signal interference of the signal lines, especially interference between strong current and weak current, the first tube 21, the second tube 22 and the third tube 23 are all metal tubes. Namely, the first tube 21, the second tube 22 and the third tube 23 can perform three functions, one is to separate different signal lines or power lines and limit the moving space of the signal lines or power lines therein; the carbon fiber is convenient to wrap, and the shielding signal is realized to prevent the mutual interference of the signals, especially the interference between strong current and weak current.
In specific implementation, the glue used is high-temperature-resistant epoxy resin, and specifically, high-temperature-resistant epoxy resin with a temperature higher than 250 ℃ can be selected. To avoid the influence of high temperature on the signal lines.
In specific implementation, referring to fig. 2, in order to realize 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 connection 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 connection ring 3 is smaller than the diameter of the shaft hole.
More specifically, a taper sleeve 5; the periphery of the taper sleeve 5 is provided with a conical surface. A shaft 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 abuts against the shaft shoulder 24; that is, the taper sleeve 5 becomes gradually smaller in diameter in a direction away from the shoulder 24. The connecting ring 3 is provided with a taper hole, and the taper hole has a shape matched with the periphery of the taper sleeve 5. That is, the tapered hole of the connection ring 3 gradually increases in diameter 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 on the end part of the threading mandrel 2, one end of the taper sleeve 5 with a large diameter shaft abuts against the shaft shoulder 24, the connecting ring 3 is sleeved on the taper sleeve, and the connecting ring is connected with the flange 4 through a bolt. With the screwing of the bolt, the connecting ring 3 and the taper sleeve 5 are continuously abutted tightly to achieve the purpose of automatic expansion, and the two ends of the rotating shaft have the same structure during implementation.
Example 2
Referring to fig. 3, this embodiment proposes a method for manufacturing a threading mandrel as disclosed in embodiment 1, wherein, with respect to the function and effect of the threading mandrel, reference is made to embodiment 1, and this is not repeated here. The embodiment comprises the following steps:
s1, coating glue on the periphery of a metal pipe, and wrapping carbon fibers; specifically, when the number of the metal pipes is various sizes, the metal pipes of various sizes are coated with an appropriate amount of glue, respectively.
S2, arranging a plurality of metal pipes wrapping the 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 adding glue Zhou Tufu outside; specifically, a proper amount of carbon fibers are wound to bind and fix the thickest metal pipe, the second thick metal pipe is sequentially arranged on the periphery of the thick metal pipe, a proper amount of carbon fibers are wound to bind and fix the metal pipe, glue is cured, finally, a proper amount of carbon fibers are wound to the thinnest metal pipe, the metal pipe is bound and fixed, and the glue is cured.
S3, wrapping the carbon fiber after the glue is cured and bonding the carbon fiber through the glue to manufacture a blank. Specifically, the carbon fiber pipe 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 of the process requirement. To complete the fabrication of the blank.
And S4, machining the blank to form the threading mandrel. Including machining the circumferential surface of the blank, machining the shoulder as in embodiment 1, etc.
When the threading mandrel is implemented, 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.
Through the above example 1 and example 2, the present invention has at least the following advantageous effects:
according to the invention, the plurality of pipe fittings are arranged on the threading mandrel, and each signal wire independently passes through the pipe fitting on the threading mandrel, so that the signal wires are prevented from being twisted and pulled apart; each signal wire is arranged in the pipe fitting with the proper diameter in a penetrating mode, so that the moving space of the signal wire is limited, and the signal wire can be prevented from being thrown off and broken 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, and 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 tube body, the second tube body and the third tube body are arranged to be metal tubes, and the signal lines and the power lines are equally arranged in different tube bodies in a penetrating manner, so that a shielding effect can be realized, and the phenomenon of mutual signal interference can be avoided.
The construction, features and functions of the present invention are described in detail in the embodiments illustrated in the drawings, which are only preferred embodiments of the present invention, but the present invention is not limited by the drawings, and all equivalent embodiments modified or changed according to the idea of the present invention should fall within the protection scope of the present invention without departing from the spirit of the present invention covered by the description and the drawings.
Claims (10)
1. A rotating shaft characterized by: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
a hollow shaft (1) provided with a shaft hole along the axis direction;
the threading mandrel (2) penetrates 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.
2. The rotating shaft according to claim 1, wherein: the threading mandrel (2) is made of a plurality of pipes wrapped with carbon fiber;
the tube comprises a first tube (21) and a second tube (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 in the circumferential direction around the center line of the first pipe body (21).
3. The rotating shaft according to claim 2, wherein: 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.
4. The rotating shaft according to claim 3, wherein: the first pipe body (21), the second pipe body (22) and the third pipe body (23) are arranged in parallel.
5. The rotating shaft according to claim 3, wherein: the peripheries of the first pipe body (21), the second pipe body (22) and the third pipe body (23) are respectively wrapped with carbon fibers.
6. The rotating shaft according to any one of claims 3 to 5, wherein: the first pipe body (21), the second pipe body (22) and the third pipe body (23) are all metal pipes.
7. The rotating shaft according to any one of claims 1 to 5, wherein: the device also comprises 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.
8. The rotating shaft according to claim 7, wherein: also comprises a taper sleeve (5);
a shaft 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 abuts 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 periphery of the taper sleeve (5).
9. A method for manufacturing a threading mandrel is characterized by comprising the following steps:
coating glue on the periphery of the metal pipe, and wrapping the carbon fiber;
arranging a plurality of metal pipes wrapping the 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 adding glue Zhou Tufu outside;
wrapping the carbon fiber after the glue is cured and bonding the carbon fiber by the glue to prepare a blank;
the blank is machined to form a threading mandrel.
10. A method of manufacturing a threading mandrel according to claim 9 wherein the glue used in each of said steps is a high temperature epoxy.
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 |
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| CN115949662A true CN115949662A (en) | 2023-04-11 |
| CN115949662B CN115949662B (en) | 2023-07-21 |
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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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| CN115949662B (en) | 2023-07-21 |
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