Lead bundling shaft

Abstract

A lead bundling shaft is used for improving the condition that a rotor shaft is long due to glue sealing of a lead bundling section. The lead bundling shaft comprises a sealing shaft, a lead shaft and an adapter shaft which are sequentially connected in the axial direction; the sealing shaft is configured to be axially connected with a rotor shaft, the sealing shaft comprises a sealing wall, the sealing wall blocks the sealing shaft, a plurality of first lead hole channels are distributed in the circumferential direction of the sealing wall, the first lead hole channels are configured to be penetrated by leads, and the first lead hole channels are filled with colloid; the lead shaft is provided with a second lead hole channel, and the second lead hole channel is configured to be penetrated by the leads and gather the leads; and the adapter shaft is configured to be connected with a middle transmission device, the adapter shaft is provided with a third lead hole channel, and the third lead hole channel is configured to be penetrated by a lead so as to enable the lead to be connected with the middle transmission device.

Description

Technical Field

[0001] The invention relates to aviation engine technology, and in particular to a lead wire clustering shaft. Background Art

[0002] Carrying out temperature, pressure, strain and other tests on aircraft engine rotors is an important guarantee for the safety performance of the rotor. Usually, the sensor sensing part is arranged on the engine rotor part, and the test leads (cables) of the sensor sensing part are gathered inside the rotor shaft and led to the front end of the engine shaft along the way, and then connected to the intermediate transmission device to transmit the test signal of the test lead to the ground experimental equipment. The intermediate transmission device is usually telemetry or slip rings. In the rotor test of large civil aviation engines, the internal environmental conditions of the rotor shaft are complex. In order to fix the bundled leads in the rotor shaft and seal the heat flow in the rotor shaft, the rotor shaft is provided with a long sealing section in the lead bundling section, which makes the rotor shaft long and the structure is not compact. Summary of the invention

[0003] The object of the present invention is to provide a lead wire bundling shaft, which is used to improve the situation that the lead wire bundling section sealing glue causes the rotor shaft to be longer.

[0004] According to an embodiment of the present invention, the lead bundling shaft includes a sealing shaft, a lead shaft and a transfer shaft which are axially connected in sequence; the sealing shaft is configured to be axially connected to the rotor shaft, the sealing shaft includes a sealing wall, the sealing wall blocks the sealing shaft, a plurality of first lead wire holes are circumferentially distributed on the sealing wall, the first lead wire holes are configured to be passed through by the leads, and the first lead wire holes are filled with colloid; the lead shaft is provided with a second lead wire hole, the second lead wire hole is configured to be passed through by the leads and to collect the leads; the transfer shaft is configured to be connected to an intermediate transmission device, the transfer shaft is provided with a third lead wire hole, the third lead wire hole is configured to be passed through by the leads so that the leads are connected to the intermediate transmission device.

[0005] In one or more embodiments, a plurality of the second lead wire holes are distributed circumferentially along the lead axis, the second lead wire holes are configured to be passed through by and fix the leads, and the second lead wire holes are inclined toward the inner circumference to collect the leads.

[0006] In one or more embodiments, each of the first lead wire passages is configured to be passed through by a lead wire.

[0007] In one or more embodiments, the first wire channel is inclined toward the inner circumference.

[0008] In one or more embodiments, the lead shaft is provided with a first protruding ring on the outer circumference, and the first protruding ring is configured to be removed for dynamic balancing.

[0009] In one or more embodiments, the lead shaft is a hollow shaft, the second lead hole is located on the inner circumference of the lead shaft, and the wall of the second lead hole protrudes from the inner circumference of the lead shaft.

[0010] In one or more embodiments, the lead bundling shaft further includes a sleeve shaft, the sleeve shaft is sleeved on the outer circumference of the lead shaft and the adapter shaft, and the adapter shaft protrudes axially from the sleeve shaft.

[0011] In one or more embodiments, the sleeve shaft is provided with a second protruding ring on the outer circumference, and the second protruding ring is configured to cooperate with the casing to seal with comb teeth.

[0012] In one or more embodiments, the sleeve shaft is connected to the adapter shaft in a torsion-proof manner, the sleeve shaft is connected to the sealing shaft in a torsion-proof manner, and the torque of the sealing shaft is transmitted to the adapter shaft through the sleeve shaft; the lead shaft adopts a composite material to reduce weight.

[0013] In one or more embodiments, the lead shaft is provided with an inclined circumferential surface on the outer circumference, and the sleeve shaft is provided with an inclined circumferential surface on the inner circumference, and the inclined circumferential surface of the lead shaft presses the inclined circumferential surface of the sleeve shaft.

[0014] The embodiments of the present invention have at least the following beneficial effects:

[0015] The multiple first lead wire holes of the sealing wall first seal the multiple lead wires in a dispersed manner, and the second lead wire holes of the lead wire shaft then gather the multiple lead wires, avoiding the need to set a long sealing glue section to seal the bundled lead wires, shortening the axial length, making the structure more compact, and reducing the weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0017] Figure 1 is a cross-sectional view of the lead bundle axis;

[0018] Figure 2 is a cross-sectional view of the lead bundle axis;

[0019] Figure 3 is a cross-sectional view of the sealing shaft;

[0020] Figure 4 This is an oblique view of the sealing shaft.

[0021] 1- Sealing shaft;

[0022] 2-lead shaft;

[0023] 3- adapter shaft;

[0024] 4- Sealing wall;

[0025] 5- first lead hole;

[0026] 6- second lead hole;

[0027] 7- the third lead hole;

[0028] 8-insertion part;

[0029] 9- docking part;

[0030] 10-pin;

[0031] 11- inclined segment;

[0032] 12-straight section;

[0033] 13- first protruding ring;

[0034] 14-side wall of the lead shaft; 15-sleeve shaft;

[0035] 16- second protruding ring;

[0036] 17- Receiver;

[0037] 18- Hexagonal slot;

[0038] 19-connecting flange;

[0039] 20-bolts;

[0040] 21-bolt hole;

[0041] 22-pin hole;

[0042] 23-top screw groove;

[0043] 24-top screw hole;

[0044] 25 - first inclined circumferential surface; 26 - second inclined circumferential surface. DETAILED DESCRIPTION

[0045] Reference will now be made in detail to embodiments of the present invention, one or more examples of which are illustrated in the accompanying drawings. Each example is provided to explain the present invention, not to limit the present invention. In fact, it will be apparent to those skilled in the art that various modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature illustrated or described as part of one embodiment may be used together with another embodiment to produce yet another embodiment. Therefore, the present invention is intended to cover these modifications and variations within the scope of the appended claims and their equivalents.

[0046] It should be noted that these and other subsequent drawings are only examples and are not drawn to scale, and should not be used to limit the actual scope of protection required by the present invention.

[0047] The terms "first", "second", etc. may be used interchangeably to distinguish one feature from another, and are not intended to mean that each feature must be located as shown in the figures in each embodiment.

[0048] like Figure 1 As shown, the lead bundling axis includes a sealing axis 1, a lead axis 2 and a transfer axis 3. The sealing axis 1, the lead axis 2 and the transfer axis 3 are connected axially in sequence from the rear end to the front end. "Axial" refers to the extension direction of the lead bundling axis, the same below. The end of the lead bundling axis where the leads (not shown in the figure) are not bundled in the axial direction is the "rear end", and the "rear" is defined accordingly, the same below. The end of the lead bundling axis where the leads are bundled in the axial direction is the "front end", and the "front" is defined accordingly, the same below.

[0049] like Figure 1 As shown, the sealing shaft 1 is also connected to the rotor shaft (not shown in the figure) at the axial rear side, and the rotor shaft is the central axis of the aircraft engine rotor. Figures 2 to 4 The sealing shaft 1 is provided with a sealing wall 4. The sealing wall 4 blocks the sealing shaft 1 to prevent the high-temperature gas in the rotor shaft from flowing forward. The sealing wall 4 may be perpendicular to the axial direction.

[0050] like Figures 2 to 4 As shown, a plurality of first lead wire holes 5 are distributed circumferentially on the sealing wall 4. The first lead wire holes 5 penetrate the sealing wall 4, and the lead wire led out of the rotor shaft passes through the first lead wire holes 5 and then passes through the sealing wall 4. After the lead wire passes through the first lead wire holes 5, the first lead wire holes 5 are filled with a colloid (not shown in the figure), and the colloid seals the first lead wire holes 5 to prevent the high-temperature gas in the rotor shaft from passing through the first lead wire holes 5. The colloid also fixes the lead wire. The filling of the colloid in the first lead wire holes 5 can be achieved by coating the colloid on the axial end surface of the sealing wall 4.

[0051] like Figure 1 and Figure 2 As shown, the lead shaft 2 is provided with a second lead hole 6, and the lead wires led out of the first lead hole 5 pass through the second lead hole 6, and the second lead hole 6 collects the lead wires, which will be described in detail later.

[0052] like Figure 1 As shown, the adapter shaft 3 is also connected to an intermediate transmission device (not shown in the figure) on the axial front side. The intermediate transmission device can be a telemeter or a slip ring. The adapter shaft 3 is provided with a third lead wire hole 7, and the lead wire led out of the second lead wire hole 6 passes through the third lead wire hole 7, and the lead wire is further connected to the intermediate transmission device. The third lead wire hole 7 can be located at the center of the adapter shaft 3 and penetrate the adapter shaft 3 in the axial direction.

[0053] The plurality of first lead wire holes 5 of the sealing wall 4 seal the plurality of lead wires in a dispersed manner first, and the second lead wire holes 6 of the lead wire shaft 2 gather the plurality of lead wires, thereby avoiding the need to set a long sealing section to seal the bundled lead wires, shortening the axial length, making the structure more compact, and reducing the weight.

[0054] like Figure 3 As shown, the first lead wire channel 5 can be tilted from back to front toward the inner periphery to collect the leads passing through the first lead wire channel 5. In addition, the tilt increases the length of the first lead wire channel 5, thereby increasing the length of the colloid in the first lead wire channel 5 and improving the sealing effect. In addition, the tilt allows the colloid in the first lead wire channel 5 to flow under the action of gravity, making it easier for the colloid to penetrate and fill the first lead wire channel 5.

[0055] like Figures 2 to 4 As shown, each first lead wire hole 5 can be passed through by only one lead wire, and each first lead wire hole 5 and the colloid inside it independently fix and seal one lead wire, with good fixing effect, minimizing the leakage of high-temperature gas passing through the first lead wire hole 5, and having good sealing effect.

[0056] like Figures 1 to 3 As shown, the sealing shaft 1 may be provided with an insertion portion 8 and a docking portion 9. The insertion portion 8 is located at the outer periphery of the sealing wall 4. The docking portion 9 is located at the outer periphery of the insertion portion 8. The insertion portion 8 protrudes axially backward relative to the docking portion 9, and is inserted into the rotor shaft to plug the rotor shaft. The docking portion 9 docks with the side wall of the rotor shaft, and the axial rear end face of the docking portion 9 sticks to the axial front end face of the side wall of the rotor shaft. The docking portion 9 may have a plurality of pins 10 distributed circumferentially, and the pins 10 are inserted into the docking portion 9 and the side wall of the rotor shaft to fix the docking portion 9 and the rotor shaft. The pin hole 22 on the sealing shaft 1 for plugging the pin 10 is Figure 4 Shown in.

[0057] like Figure 1 and Figure 2 As shown, the lead shaft 2 can have multiple second lead holes 6 distributed circumferentially, and multiple leads led out of all first lead holes 5 form multiple bundles, each bundle of leads passes through the second lead holes 6, and all leads are dispersed and fixed along the way by multiple second lead holes 6, so as to avoid the centrifugal force pulling the leads to deform, swing and swing during rotation, reduce the damage to the leads by centrifugal force, avoid setting a long sealing section to fix the bundled leads, shorten the axial length, make the structure more compact, and reduce the weight. The lead shaft 2 can have twelve second lead holes 6 distributed circumferentially.

[0058] like Figure 1 and Figure 2As shown, the second lead wire channel 6 may be provided with an inclined section 11, which is inclined from back to front toward the inner periphery to collect the lead wires. The second lead wire channel 6 may also be provided with a straight section 12, which is connected to the inclined section 11 and is located at the axial front side of the inclined section 11. The straight section 12 extends axially, and the guide lead wire extends axially and then smoothly enters the third lead wire channel 7 of the adapter shaft 3.

[0059] like Figure 1 and Figure 2 As shown, the lead shaft 2 may be provided with a first protruding ring 13 on the outer circumference, and the first protruding ring 13 may protrude radially outward from the outer circumferential surface of the lead shaft 2. The first protruding ring 13 may be partially removed to achieve rotational balance. After the leads are arranged through the lead collection shaft, the uneven distribution of the leads in the circumferential direction may cause the lead collection shaft to rotate unbalanced, and the first protruding ring 13 may be partially removed to achieve rotational balance of the lead collection shaft. The first protruding ring 13 may be removed by grinding.

[0060] like Figure 1 and Figure 2 As shown, the lead shaft 2 can be a hollow shaft, the second lead hole 6 can be located on the inner periphery of the lead shaft 2, and the wall of the second lead hole 6 can protrude radially inward from the inner periphery of the side wall 14 of the lead shaft 2, which reduces the thickness of the side wall 14 of the lead shaft 2 and reduces the mass of the lead shaft 2.

[0061] like Figure 1 and Figure 2 As shown, the lead shaft 2 can be made of composite material, and the composite material can be a carbon fiber composite material to reduce the weight of the lead shaft 2. The lead shaft 2 can be integrally formed by 3D printing, and the second lead channel 6 can be round or square to reduce the difficulty of 3D printing.

[0062] like Figure 1 As shown, the lead bunching shaft may further include a sleeve shaft 15, which is sleeved on the outer circumference of the lead shaft 2 and the adapter shaft 3. The front end of the adapter shaft 3 protrudes axially from the sleeve shaft 15 to connect to the intermediate transmission device. The adapter shaft 3 is axially inserted into the sleeve shaft 15 to shorten the axial length, make the structure more compact, and reduce the weight. During installation, the eccentricity of the axial center of the lead bunching shaft can be adjusted by adjusting the installation position of the adapter shaft 3 relative to the sleeve shaft 15.

[0063] like Figure 1 As shown, the sleeve shaft 15 may be provided with a second protruding ring 16 on the outer periphery, and the second protruding ring 16 may protrude radially outward from the outer peripheral surface of the sleeve shaft 15, and cooperate with the casing 17 to seal with grate teeth to prevent oil and gas from flowing forward. The sleeve shaft 15 and the casing 17 may form two grate teeth seals in the axial direction.

[0064] like Figure 1 and Figure 2As shown, the sleeve 15 can be connected to the adapter shaft 3 in a torsion-proof manner. The sleeve 15 can be provided with a hexagonal slot 18 in the middle of the axial direction, and the rear end of the adapter shaft 3 is inserted into the hexagonal slot 18 to form a torsion-proof connection to transmit torque. The sleeve 15 can be connected to the sealing shaft 1 in a torsion-proof manner. The sleeve 15 can be provided with a connecting flange 19 at the rear end, and the connecting flange 19 is located at the axial front side of the insertion part 8. The axial rear end face of the connecting flange 19 is attached to the axial front end face of the insertion part 8. The connecting flange 19 is circumferentially distributed with multiple bolts 20. The bolts 20 connect the insertion part 8 and the connecting flange 19, fix the sleeve 15 and the sealing shaft 1, and form a torsion-proof connection to transmit torque. The rotor axially transmits torque to the sealing shaft 1, and the torque of the sealing shaft 1 is transmitted to the adapter shaft 3 through the sleeve 15, so that the lead bundle shaft rotates. This makes the lead shaft 2 not transmit torque, reduces the strength and stiffness requirements of the lead shaft 2, and facilitates reducing the weight of the lead shaft 2. As mentioned above, the lead shaft 2 is made of composite materials. The sleeve shaft 15 can be made of metal. The connecting flange 19 can be evenly distributed with six bolts 20 in the circumferential direction. The bolt holes 21 on the sealing shaft 1 for connecting the bolts 20 are located at Figure 3 and Figure 4 Shown in.

[0065] like Figure 1 and Figure 2 As shown, the inner circumferential surface of the connecting flange 19 and the axial rear end surface can form a convex step, the outer circumferential surface of the sealing wall 4 and the axial front end surface of the insert portion 8 can form a concave step, and the convex step can be inserted into the concave step to form a stop tight fit, thereby improving the axial concentricity of the sleeve shaft 15 and the sealing shaft 1, reducing the force on the bolt 20, and improving the connection strength between the sleeve shaft 15 and the sealing shaft 1.

[0066] like Figure 2 As shown, the connecting flange 19 may be provided with a screw hole 24, and the screw hole 24 penetrates the connecting flange 19, so as to facilitate screwing and disassembling the sleeve shaft 15 and the sealing shaft 1. Figure 4 The axial front end surface of the sealing shaft 1 may be provided with a top screw groove 23, and the top screw passes through the top screw hole 24 and abuts against the top screw groove 23 to be decomposed by the top screw. The connecting flange 19 may have three top screw holes 24 evenly distributed in the circumferential direction.

[0067] like Figure 1 and Figure 2As shown, the lead shaft 2 may be provided with a first inclined circumferential surface 25 on the outer circumference, and the first inclined circumferential surface 25 is the outer circumferential surface of the lead shaft 2. The first inclined circumferential surface 25 may be inclined from back to front to the inner circumference. The sleeve shaft 15 is provided with a second inclined circumferential surface 26 on the inner circumference, and the second inclined circumferential surface 26 is the inner circumferential surface of the lead shaft. The second inclined circumferential surface 26 may be inclined from back to front to the inner circumference. The first inclined circumferential surface 25 of the lead shaft 2 presses the second inclined circumferential surface 26 of the sleeve shaft 15 and fixes it. During installation, the first inclined circumferential surface 25 may slide relative to the second inclined circumferential surface 26 to adjust, thereby reducing the adverse effects of machining and assembly tolerances on installation. The lead shaft 2 may be provided with two first inclined circumferential surfaces 25 at the front end and the rear end. The sleeve shaft 15 may be provided with two second inclined circumferential surfaces 26 at the middle and the rear end. The lead shaft 2 may be pressed forward by the sealing wall 4 of the sealing shaft 1 at the rear end to be fixed.

[0068] Although the present invention is disclosed as above by the embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention.

Claims

1. A lead bundle axis, characterized in that: The lead bundle shaft comprises a sealing shaft, a lead shaft and a transfer shaft which are connected in sequence in the axial direction; The sealing shaft is configured to be axially connected to the rotor shaft, the sealing shaft comprises a sealing wall, the sealing wall blocks the sealing shaft, a plurality of first lead wire holes are circumferentially distributed on the sealing wall, the first lead wire holes are configured to be passed through by the lead wire, and the first lead wire holes are filled with colloid; The lead shaft is provided with a second lead hole, and the second lead hole is configured to be passed through by the lead and collect the lead; The transfer shaft is configured to be connected to an intermediate transmission device, and a third wire guide hole is provided on the transfer shaft. The third wire guide hole is configured to be passed through by a wire so as to connect the wire to the intermediate transmission device.

2. The lead bundle axis according to claim 1, characterized in that: A plurality of the second lead wire holes are distributed circumferentially of the lead wire axis. The second lead wire holes are configured to be passed through by and fix the lead wires. The second lead wire holes are inclined toward the inner circumference to collect the lead wires.

3. The lead bundle axis according to claim 1, characterized in that: Each of the first lead wire passages is configured to be passed through by a lead wire.

4. The lead bundle axis according to claim 1, characterized in that: The first lead wire channel is inclined toward the inner circumference.

5. The lead bundle axis according to claim 1, characterized in that: The lead shaft is provided with a first protruding ring on the outer circumference, and the first protruding ring is configured to be removed for dynamic balance.

6. The lead bundle axis according to claim 2, characterized in that: The lead shaft is a hollow shaft, the second lead hole is located on the inner circumference of the lead shaft, and the wall of the second lead hole protrudes from the inner circumference of the lead shaft.

7. The lead bundle axis according to claim 1, characterized in that: The lead bundle shaft further comprises a sleeve shaft, which is sleeved on the outer circumference of the lead shaft and the adapter shaft, and the adapter shaft protrudes axially from the sleeve shaft.

8. The lead bundle axis according to claim 7, characterized in that: The sleeve shaft is provided with a second protruding ring on the outer periphery, and the second protruding ring is configured to cooperate with the casing to seal with comb teeth.

9. The lead bundle axis according to claim 7, characterized in that: The sleeve shaft is connected to the adapter shaft in a rotationally fixed manner, the sleeve shaft is connected to the sealing shaft in a rotationally fixed manner, and the torque of the sealing shaft is transmitted to the adapter shaft through the sleeve shaft; The lead shaft is made of composite material to reduce weight.

10. The lead bundle axis according to claim 7, characterized in that: The lead shaft is provided with an inclined circumferential surface on the outer circumference, and the sleeve shaft is provided with an inclined circumferential surface on the inner circumference, and the inclined circumferential surface of the lead shaft presses the inclined circumferential surface of the sleeve shaft.

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