Slip Ring Device and Aeroengine Comprising the Same

Abstract

The present invention discloses a slip ring device and an aero-engine including the same. The slip ring device comprises a rotor, a first bearing, a sleeve and a stator. The sleeve is sleeved outside the rotor, and a first bearing is arranged between the sleeve and the rotor. The first bearing includes a relatively rotatable first inner ring and a first outer ring. The first inner ring is fixedly connected to the rotor, and the first outer ring is fixedly connected to the sleeve. The first inner ring and the first outer ring move synchronously in the axial direction. The stator is arranged on the outer peripheral side of the sleeve, and a relative displacement can be generated between the stator and the sleeve in the axial direction. The slip ring device further includes a brush, the brush is fixed on the inner surface of the sleeve, and a brush groove adapted to the brush is arranged on the outer surface of the rotor. In the slip ring device of the present invention, the sleeve is arranged between the stator and the rotor. When the brush is arranged in the sleeve and cooperates with the brush groove on the outer surface of the rotor, the situation that the brush is damaged due to the axial displacement between the brush and the brush groove will not occur.

Description

Technical Field

[0001] The present invention relates to the field of slip rings, and particularly to a slip ring device and an aero-engine including the same. Background Art

[0002] Rotating machinery is found in all walks of life, and there are often test signals that need to be transmitted from the rotor. Although wireless transmission technology and equipment have developed greatly, traditional slip rings are still widely used due to their low cost, more mature technology, and more stable operation.

[0003] Traditional slip rings are divided into two parts, one is the rotor part and the other is the stator part. Signals are transmitted through brush contact between the rotor and the stator. Therefore, generally, a large axial displacement is not allowed between the rotor and the stator, as a large axial displacement will cause problems in the circuit, such as even damage to the brushes. So, traditional slip rings cannot be used in occasions with large axial displacements.

[0004] In rotating machinery such as aero-engines, due to various reasons such as large temperature differences under various working conditions of the rotor, the axial displacement is large. However, it is necessary to transmit the measurement signals on the rotor. Traditional slip rings are difficult to apply, and even if applied, they are easily damaged. Once the slip ring is damaged, key components lack monitoring, which affects the test safety. Continuing the test may lead to serious accidents, while stopping the test seriously affects the project progress. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defect that axial displacement occurs between the rotor part and the stator part during the test of the existing slip ring, resulting in damage to the brushes, etc., and to provide a slip ring device and an aero-engine including the same.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] The present invention provides a slip ring device, which includes a rotor, a first bearing, a sleeve, and a stator. The sleeve is sleeved outside the rotor, and the first bearing is arranged between the sleeve and the rotor. The first bearing includes a relatively rotatable first inner ring and a first outer ring. The first inner ring is fixedly connected to the rotor, the first outer ring is fixedly connected to the sleeve, and the first inner ring and the first outer ring move synchronously in the axial direction.

[0008] The stator is arranged on the outer peripheral side of the sleeve, and the stator and the sleeve can generate relative displacement in the axial direction.

[0009] The slip ring device further includes a brush, the brush is fixed on the inner surface of the sleeve, and a brush groove adapted to the brush is arranged on the outer surface of the rotor.

[0010] In this solution, adopting the above structural form, the sleeve is arranged between the stator and the rotor, and only rotation occurs between the sleeve and the rotor without axial movement, while axial movement can occur between the stator and the sleeve, enabling the rotor axially fixed to the sleeve and the stator to withstand a certain axial displacement. When the brush is arranged in the sleeve to cooperate with the brush groove on the outer surface of the rotor, since no axial movement occurs between the sleeve and the rotor, the brush and the brush groove will not move axially either, but only rotate circumferentially, avoiding the situation where axial displacement of the rotor and stator of the existing slip ring device causes axial displacement of the brush and the brush groove, resulting in damage to the brush.

[0011] Preferably, the slip ring device further includes a limiting mechanism for limiting the length of the axial displacement of the sleeve relative to the stator.

[0012] In this solution, the limiting mechanism is set to limit the relatively large displacement of the sleeve relative to the stator, thereby limiting the relatively large axial displacement of the rotor.

[0013] Preferably, the slip ring device further includes an elastic support member arranged between the stator and the sleeve. One end of the elastic support member is fixedly connected to the stator, and the other end of the elastic support member is slidably arranged on the outer surface of the sleeve.

[0014] In this solution, after the slip ring device is installed at the end of the rotor of the rotating machinery, the slip ring device will affect the dynamic characteristics of the measured rotor, and the margin of the critical resonance speed of the measured rotor may be insufficient. To reduce the influence of the slip ring on the dynamic characteristics of the measured rotor, an elastic support member is set to adjust the vibration characteristics of the rotor of the slip ring device. By adjusting the stiffness of the elastic support member, the resonance speed of the rotor of the slip ring device is adjusted, so that the shafting formed by the rotor of the slip ring device and the measured rotor meets the margin requirement of its critical resonance speed, improving the accuracy of the measurement of the measured rotor.

[0015] Preferably, the stator is in a cylindrical structure and the stator is sleeved outside the sleeve.

[0016] In this solution, adopting the above structural form, the structure is simple and it is convenient to cooperate with the sleeve.

[0017] Preferably, a wire passing hole is formed on the side wall of the stator. A signal wire is connected to the brush, and the signal wire passes through the wire passing hole and is connected to an external signal receiving device.

[0018] In this solution, setting the wire passing hole facilitates leading out the signal wire connected to the brush and connecting it to an external signal receiving device.

[0019] Preferably, the slip ring device further includes a second bearing disposed between the sleeve and the stator. The second bearing includes a second inner ring and a second outer ring. The second inner ring is fixedly connected to the sleeve, and the second outer ring is fixedly connected to the stator. The second inner ring and the second outer ring can move relative to each other axially.

[0020] In this solution, the sleeve and the stator are connected by the second bearing, and axial displacement can occur between the sleeve and the stator, which is convenient for installation and avoids setting corresponding sliding structures on the sleeve and the stator.

[0021] Preferably, the slip ring device further includes an elastic support member disposed between the stator and the sleeve;

[0022] The elastic support member has a first mounting portion extending radially along the sleeve and a second mounting portion extending axially along the sleeve. The first mounting portion is fixedly connected to the stator, and the second mounting portion is fixedly connected to the second outer ring.

[0023] In this solution, by connecting the elastic support member to the stator and the second outer ring of the second bearing, when the rotor vibrates, it can be transmitted to the sleeve, the second bearing, the elastic support member, and the stator through the first bearing in sequence. The elasticity of the elastic support member is used for buffering to reduce the influence caused by the vibration of the rotor. By adjusting the stiffness of the elastic support member, the resonance speed of the rotor of the slip ring device can be adjusted, so that the shafting formed by the rotor of the slip ring device and the measured rotor meets the margin requirement of its resonance critical speed, and the measurement accuracy of the measured rotor is improved.

[0024] Preferably, the slip ring device further includes a limiting mechanism for limiting the length of the axial displacement of the sleeve relative to the stator;

[0025] The limiting mechanism includes a fixing member and an elastic member. The fixing member is fixedly connected to the stator or the elastic support member. One end of the elastic member is connected to the fixing member, and the other end of the elastic member is fixedly connected to the sleeve.

[0026] In this solution, the limiting mechanism is provided to limit the large displacement of the sleeve relative to the stator and thus limit the large axial displacement of the rotor. When the rotor undergoes axial displacement, the elastic member will give the sleeve a force opposite to the axial displacement of the rotor, causing the sleeve to drive the rotor to have a tendency to move in the direction opposite to the axial displacement. This can not only slow down the speed of the axial displacement of the rotor but also prevent the rotor from undergoing a large axial displacement, which may affect the service life of the second bearing.

[0027] Preferably, a first pressing portion is provided on the elastic support member, a second pressing portion is provided on the fixing member, and two ends of the second outer ring are respectively abutted against the first pressing portion and the second pressing portion.

[0028] In this solution, the above structure is adopted to fix the second outer ring of the second bearing so that it is axially relatively stationary with respect to the stator.

[0029] Preferably, second mounting platforms are provided at both ends of the outer peripheral surface of the sleeve, and the second mounting platforms are used for mounting the second bearing;

[0030] A first limiting member and a second limiting member are respectively provided on both sides of the second bearing on the sleeve, and the first limiting member and the second limiting member are used for fixing the second inner ring on the sleeve.

[0031] In this solution, with the above structure, the second inner ring of the second bearing is fixed on the sleeve so that it can axially move with the rotor together with the sleeve, and thus relative axial displacement can be realized between the sleeve and the stator.

[0032] Preferably, the first limiting member is a convex platform radially protruding outward from the outer surface of the sleeve;

[0033] And / or, the second limiting member is a compression ring, and the compression ring is sleeved outside the sleeve and presses against the second inner ring.

[0034] In this solution, with the above structure form, the first limiting member is integrally formed with the sleeve, with a simple structure, which is convenient for installing and limiting the second bearing. The second limiting member is a compression ring, which can be separated from the sleeve, facilitating the installation of the second bearing.

[0035] Preferably, the second bearing is a cylindrical roller bearing.

[0036] In this solution, the inner ring and the outer ring of the cylindrical roller bearing can not only rotate circumferentially, but also have a certain axial displacement.

[0037] Preferably, a limiting groove is provided on the sleeve, and an anti-rotation member is fixed on the stator, and the anti-rotation member is inserted into the limiting groove to prevent the sleeve from rotating.

[0038] In this solution, by providing an anti-rotation member on the stator, relative rotation between the sleeve and the stator is avoided, which affects the stability and accuracy of the brush output signal.

[0039] Preferably, first mounting platforms are provided at both ends of the outer peripheral surface of the rotor, and the first mounting platforms are used for mounting the first bearing;

[0040] On both sides of the first bearing on the rotor, there are a third limiting member and a fourth limiting member respectively, and the third limiting member and the fourth limiting member are used to fix the first inner ring on the rotor.

[0041] In this solution, with the above structure, the first inner ring of the first bearing is fixed on the rotor, enabling it to move synchronously with the rotor and avoiding axial displacement between the first bearing and the rotor.

[0042] Preferably, the third limiting member is a boss radially protruding outward from the outer surface of the rotor;

[0043] And / or, the fourth limiting member is a compression nut, and the compression nut is sleeved on the rotor and presses against the first inner ring.

[0044] In this solution, with the above structural form, the third limiting member is integrally formed with the rotor, having a simple structure and facilitating the installation and limitation of the first bearing. The fourth limiting member is a compression nut, which can be separated from the rotor, facilitating the installation of the first bearing.

[0045] Preferably, on the inner surface of the sleeve on both sides of the first bearing, there are a fifth limiting member and a sixth limiting member respectively, and the fifth limiting member and the sixth limiting member are used to fix the first outer ring on the sleeve.

[0046] In this solution, with the above structure, the first outer ring of the first bearing is fixed on the sleeve, enabling the sleeve to rotate relative to the rotor while axially moving together with the rotor, making the brush only rotate circumferentially relative to the brush groove and avoiding axial movement between the brush and the brush groove.

[0047] Preferably, the fifth limiting member is a boss radially protruding inward from the inner surface of the sleeve;

[0048] And / or, the sixth limiting member is a compression ring, and the compression ring is sleeved in the sleeve and presses against the first outer ring.

[0049] In this solution, with the above structural form, the fifth limiting member is integrally formed with the sleeve, having a simple structure and facilitating the limitation of the first outer ring of the first bearing. The sixth limiting member is a compression ring, which can be separated from the sleeve, facilitating the installation of the sleeve on the first bearing.

[0050] Preferably, the rotor is provided with a first mounting flange, and the stator is provided with a second mounting flange.

[0051] In this solution, the first mounting flange on the rotor facilitates fixing the rotor of the slip ring device on the rotor to be measured, and the second mounting flange on the stator facilitates fixing the stator of the slip ring device to the external stationary component.

[0052] Preferably, the first bearing is a deep groove ball bearing or a pair of angular contact ball bearings.

[0053] In this solution, the inner and outer rings of the deep groove ball bearing or the pair of angular contact ball bearings can bear axial loads, will not undergo axial displacement, and can only rotate circumferentially.

[0054] Preferably, there are multiple brush grooves and they are evenly arranged along the axial direction of the rotor.

[0055] In this solution, setting multiple brush grooves can monitor multiple groups of signals of the measured rotor simultaneously.

[0056] The present invention also provides an aeroengine, and the aeroengine includes the slip ring device as described above.

[0057] On the basis of conforming to the common knowledge in the art, the above preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0058] The positive and progressive effects of the present invention are as follows: In the slip ring device of the present invention, the sleeve is arranged between the stator and the rotor, and only rotation occurs between the sleeve and the rotor without axial movement, while axial movement can occur between the stator and the sleeve, enabling the rotor and the stator axially fixed to the sleeve to bear a certain axial displacement. When the brush is arranged in the sleeve to cooperate with the brush groove on the outer surface of the rotor, since no axial movement occurs between the sleeve and the rotor, the brush and the brush groove will not move axially either, but only rotate circumferentially, avoiding the situation that axial displacement of the rotor and the stator of the existing slip ring device causes axial displacement of the brush and the brush groove, resulting in brush damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 It is a schematic structural diagram of the slip ring device in a preferred embodiment of the present invention.

[0060] Figure 2 is Figure 1 the enlarged schematic diagram of the structure at A in

[0061] Figure 3 is Figure 1 the side view of the slip ring device in

[0062] Figure 4 It is a partial structural sectional view of the slip ring device in a preferred embodiment of the present invention.

[0063] Figure 5 It is a partial structural schematic diagram of the slip ring device in a preferred embodiment of the present invention.

[0064] Description of the reference numerals:

[0065] Rotor 100

[0066] Brush groove 110

[0067] First mounting flange 120

[0068] Sleeve 200

[0069] First limiting member 201

[0070] Fifth limiting member 202

[0071] Stator 300

[0072] Wire routing hole 310

[0073] Second mounting flange 320

[0074] First bearing 400

[0075] First inner ring 410

[0076] First outer ring 420

[0077] Brush 500

[0078] Second bearing 600

[0079] Second inner ring 610

[0080] Second outer ring 620

[0081] Elastic support member 700

[0082] First mounting portion 710

[0083] Second mounting portion 720

[0084] First pressing portion 721

[0085] Anti-rotation member 800

[0086] Limiting mechanism 900

[0087] Fixing member 910

[0088] Second pressing portion 911

[0089] Elastic member 920

[0090] First compression ring 10

[0091] Second compression ring 20

[0092] End fixing ring 30

[0093] Compression nut 40

[0094] Mounting ring 50 Specific implementation manner

[0095] The present invention will be more clearly and completely described below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of these embodiments.

[0096] As Figures 1-5 shown, it is a schematic structural diagram of a slip ring device disclosed in this embodiment. The slip ring device includes a rotor 100, a first bearing 400, a sleeve 200, and a stator 300. The sleeve 200 is sleeved outside the rotor 100. A first bearing 400 is provided between the sleeve 200 and the rotor 100. The first bearing 400 includes a relatively rotatable first inner ring 410 and a first outer ring 420. The first inner ring 410 is fixedly connected to the rotor 100, and the first outer ring 420 is fixedly connected to the sleeve 200. The first inner ring 410 and the first outer ring 420 move synchronously in the axial direction.

[0097] The stator 300 is provided on the outer peripheral side of the sleeve 200, and the stator 300 and the sleeve 200 can generate relative displacement in the axial direction.

[0098] The slip ring device further includes a brush 500. The brush 500 is fixed on the inner surface of the sleeve 200, and a brush groove 110 adapted to the brush 500 is provided on the outer surface of the rotor 100.

[0099] In this embodiment, the sleeve 200 is provided between the stator 300 and the rotor 100, and only rotation occurs between the sleeve 200 and the rotor 100 without axial movement. Axial movement can occur between the stator 300 and the sleeve 200, so that the rotor 100 axially fixed to the sleeve 200 and the stator 300 can withstand a certain axial displacement. When the brush 500 is arranged in the sleeve 200 to cooperate with the brush groove 110 on the outer surface of the rotor 100, since no axial movement occurs between the sleeve 200 and the rotor 100, the brush 500 and the brush groove 110 will not move axially either, but only rotate circumferentially, avoiding the situation where the axial displacement of the rotor and the stator of the existing slip ring device causes the axial displacement of the brush and the brush groove 110, resulting in damage to the brush.

[0100] As Figure 1 and Figure 3 shown, in this embodiment, the stator 300 has a cylindrical structure and is sleeved outside the sleeve 200. The sleeve 200 also has a cylindrical structure. The stator 300 and the sleeve 200 in this embodiment adopt a cylindrical structure, which has a simple structure, is convenient for processing, and is also convenient for the cooperation between the stator 300 and the sleeve 200.

[0101] Of course, in other embodiments, the stator 300 or the sleeve 200 can also be of other structural types, but it is necessary to ensure that both ends of the sleeve 200 are fixedly installed with the first outer ring 420 of the first bearing 400, and the stator 300 and the sleeve 200 can move axially relative to each other. The specific structure will not be elaborated here, and those skilled in the art can make a reasonable design according to the above requirements.

[0102] As Figure 1 and Figure 4 shown, in this embodiment, a wire routing hole 310 is formed in the side wall of the stator 300. A signal line (not shown in the figure) is connected to the brush 500, and the signal line passes through the wire routing hole 310 and is connected to an external signal receiving device. The provision of the wire routing hole 310 facilitates leading out the signal line connected to the brush 500 and connecting it to an external signal receiving device.

[0103] As Figure 1 、 Figure 2 and Figure 4 shown, in this embodiment, the slip ring device further includes a second bearing 600. The second bearing 600 is disposed between the sleeve 200 and the stator 300. The second bearing 600 includes a second inner ring 610 and a second outer ring 620. The second inner ring 610 is fixedly connected to the sleeve 200, and the second outer ring 620 is fixedly connected to the stator 300. The second inner ring 610 and the second outer ring 620 can move axially relative to each other. In this embodiment, the sleeve 200 and the stator 300 are connected by the second bearing 600, and axial displacement can occur between the sleeve 200 and the stator 300, which is convenient for installation and avoids setting corresponding sliding guide structures on the sleeve 200 and the stator 300.

[0104] In other embodiments, it is also possible to provide an axially extending guide chute on the outer surface of the sleeve 200, and a guide slider adapted to the guide chute is provided on the stator 300, which can also achieve the function of relative axial displacement between the stator 300 and the sleeve 200.

[0105] Of course, in other embodiments, it is also possible to achieve relative axial displacement between the stator 300 and the sleeve 200 by providing a sliding guide assembly on the sleeve 200 and the stator 300. The specific structure will not be elaborated here.

[0106] In this embodiment, the slip ring device further includes an elastic support member 700. The elastic support member 700 is disposed between the stator 300 and the sleeve 200. One end of the elastic support member 700 is fixedly connected to the stator 300, and the other end of the elastic support member 700 is slidably disposed on the outer surface of the sleeve 200.

[0107] After a slip ring device is installed at the end of the rotor of a rotating machine, the slip ring device will affect the dynamic characteristics of the rotor under test, and may cause the margin of the critical resonance speed of the rotor under test to be insufficient. To reduce the influence of the slip ring on the dynamic characteristics of the rotor under test, an elastic support member 700 is provided to adjust the vibration characteristics of the rotor 100 of the slip ring device. By adjusting the stiffness of the elastic support member 700, the resonance speed of the rotor 100 of the slip ring device is adjusted, so that the shafting formed by the rotor 100 of the slip ring device and the rotor under test meets the margin requirement of its critical resonance speed, and the accuracy of the test of the rotor under test is improved.

[0108] The elastic support member 700 has a first mounting portion 710 extending radially along the sleeve 200 and a second mounting portion 720 extending axially along the sleeve 200. The first mounting portion 710 is fixedly connected to the stator 300, and the second mounting portion 720 is fixedly connected to the second outer ring 620.

[0109] As Figures 1-5 shown, in this embodiment, the elastic support member 700 includes a cylindrical barrel and a flange provided at one end of the barrel. That is, the first mounting portion 710 is the barrel, and the second mounting portion 720 is the flange. The barrel can elastically deform when subjected to an external load and return to its original state after the load is removed. To enhance the elastic deformation ability of the barrel and reduce the weight, a plurality of axially extending strip holes are provided in the circumferential direction of the barrel.

[0110] When the elastic support member 700 in this embodiment is installed, it is fixed to the end of the stator 300 through the flange, and the inner surface of the barrel is attached to the outer peripheral surface of the second outer ring 620 of the second bearing 600. By connecting the elastic support member 700 to the stator 300 and the second outer ring 620 of the second bearing 600, when the rotor 100 vibrates, it can be sequentially transmitted to the sleeve 200, the second bearing 600, the elastic support member 700, and the stator 300 through the first bearing 400, and the elasticity of the elastic support member 700 is used for buffering to reduce the influence caused by the vibration of the rotor 100. By adjusting the stiffness of the elastic support member 700, the resonance speed of the rotor 100 of the slip ring device is adjusted, and further the shafting formed by the rotor 100 of the slip ring device and the rotor under test meets the margin requirement of its critical resonance speed, and the accuracy of the test of the rotor under test is improved.

[0111] In other embodiments, the elastic support member 700 may also be in other structural forms, which will not be elaborated here.

[0112] The slip ring device further includes a limiting mechanism 900, and the limiting mechanism 900 is used to limit the length of the axial displacement of the sleeve 200 relative to the stator 300. By setting the limiting mechanism 900, the large displacement of the sleeve 200 relative to the stator 300 is restricted, and thus the large axial displacement of the rotor 100 is restricted.

[0113] The limiting mechanism 900 includes a fixing member 910 and an elastic member 920. The fixing member 910 is fixedly connected to the elastic support member 700. One end of the elastic member 920 is connected to the fixing member 910, and the other end of the elastic member 920 is fixedly connected to the sleeve 200.

[0114] As Figure 1 and Figure 2 shown, in this embodiment, the fixing member 910 has an L-shaped structure. One side of the fixing member 910 is arranged parallel to the sleeve 200 and is fixed to the cylinder body of the elastic support member 700. The other side of the fixing member 910 extends vertically towards the sleeve 200, and a spring is installed thereon. The other end of the spring is fixed to the sleeve 200.

[0115] The slip ring device of this embodiment limits the relatively large displacement of the sleeve 200 relative to the stator 300 by setting the limiting mechanism 900, thereby restricting the relatively large axial displacement of the rotor 100. When the rotor 100 undergoes an axial displacement, the elastic member 920 will apply a force to the sleeve 200 in the direction opposite to the axial displacement of the rotor 100, causing the sleeve 200 to drive the rotor 100 to have a tendency to move in the direction opposite to the axial displacement. This can not only slow down the speed of the axial displacement of the rotor 100 but also prevent the rotor 100 from having a relatively large axial displacement, which affects the service life of the second bearing 600.

[0116] In other embodiments, the limiting mechanism 900 can also be in other structural forms. For example, the fixing member 910 is a strip-shaped structure installed on the stator 300, and the elastic member 920 is a spring sheet, etc. Other structures that can achieve the function of the limiting mechanism 900 can be simply deformed on the basis of the above structures, which will not be elaborated here.

[0117] As Figure 2 shown, in this embodiment, the elastic support member 700 has a first pressing portion 721, and the fixing member 910 has a second pressing portion 911. Both ends of the second outer ring 620 are respectively abutted against the first pressing portion 721 and the second pressing portion 911. With the above structural form, the second outer ring 620 of the second bearing 600 is fixed, making it axially relatively stationary with respect to the stator 300.

[0118] In this embodiment, both ends of the outer peripheral surface of the sleeve 200 have second mounting platforms for mounting the second bearing 600. On both sides of the second bearing 600 on the sleeve 200, there are a first limiting member 201 and a second limiting member respectively. The first limiting member 201 and the second limiting member are used to fix the second inner ring 610 on the sleeve 200.

[0119] In this embodiment, by adopting the above structure, the second inner ring 610 of the second bearing 600 is fixed on the sleeve 200, so that it can axially move with the sleeve 200 along with the rotor 100, and thus a relative axial displacement can be achieved between the sleeve 200 and the stator 300.

[0120] As Figure 2 shown, in this embodiment, the first limiting member 201 is a boss protruding radially outward from the outer surface of the sleeve 200. The second limiting member is the first pressing ring 10, and the first pressing ring 10 is sleeved outside the sleeve 200 and presses against the second inner ring 610.

[0121] In this embodiment, by adopting the above structure, the first limiting member 201 is integrally formed with the sleeve 200, with a simple structure, which is convenient for installing and limiting the second bearing 600. The second limiting member is the first pressing ring 10, which can be separated from the sleeve 200, facilitating the installation of the second bearing 600.

[0122] In other embodiments, the inner ring of the second bearing 600 can also be limited in other ways to fix the second inner ring 610 of the second bearing 600 to the sleeve 200.

[0123] In this embodiment, the second bearing 600 is a cylindrical roller bearing. The inner ring and the outer ring of the cylindrical roller bearing can not only rotate circumferentially, but also have a certain axial displacement.

[0124] In other embodiments, the second bearing 600 can also be other bearings with similar functions, which will not be exemplified here.

[0125] In this embodiment, a limiting groove is provided on the sleeve 200, and an anti-rotation member 800 is fixed on the stator 300. The anti-rotation member 800 is inserted into the limiting groove to prevent the sleeve 200 from rotating. By providing the anti-rotation member 800 on the stator 300, relative rotation between the sleeve 200 and the stator 300 is avoided, which affects the stability and accuracy of the signal output by the brush 500.

[0126] As Figure 1 shown, both ends of the outer peripheral surface of the rotor 100 have first mounting platforms (not shown in the figure), and the first mounting platforms are used for mounting the first bearing 400. On both sides of the first bearing 400 on the rotor 100, there are a third limiting member and a fourth limiting member respectively, and the third limiting member and the fourth limiting member are used to fix the first inner ring 410 on the rotor 100. By adopting the above structure, the first inner ring 410 of the first bearing 400 is fixed on the rotor 100, so that it can move synchronously with the rotor 100, avoiding axial displacement between the first bearing 400 and the rotor 100.

[0127] As Figure 2As shown, in this embodiment, the third limiting member is a boss protruding radially outward from the outer surface of the rotor 100. The fourth limiting member is a compression nut 40, and the compression nut 40 is sleeved outside the rotor 100 and presses against the first inner ring 410. With the above structural form, the third limiting member is integrally formed with the rotor 100, with a simple structure, which is convenient for installing and limiting the first bearing 400. The fourth limiting member is a compression nut 40, which can be separated from the rotor 100, facilitating the installation of the first bearing 400.

[0128] When installing the first bearings 400 at both ends of the rotor 100, since the rotor flange 120 is provided at one end, the two first bearings 400 need to be installed from the same end. This will cause the boss for limiting the first bearing 400 not to be formed at the first mounting table at this end. The outer peripheral surface at this place is processed to have a smaller diameter than other parts, and a mounting ring 50 is provided at this place, so that the limiting portion on the mounting ring 50 limits one side of the first bearing 400. Alternatively, in other embodiments, two first bearings 400 of different models are used, but the first outer rings 420 of the two first bearings 400 are both fitted and fixed to the inner surface of the sleeve 200.

[0129] As Figure 2 shown, in this embodiment, the inner surface of the sleeve 200 is respectively provided with a fifth limiting member 202 and a sixth limiting member on both sides of the first bearing 400. The fifth limiting member 202 and the sixth limiting member are used to fix the first outer ring 420 on the sleeve 200. By fixing the first outer ring 420 of the first bearing 400 on the sleeve 200, while the sleeve 200 rotates relative to the rotor 100 and axially moves together with the rotor 100, the brush 500 only rotates circumferentially relative to the brush groove 110, avoiding the axial movement of the brush 500 and the brush groove 110.

[0130] Again, as Figure 2 shown, in this embodiment, the fifth limiting member 202 is a boss protruding radially inward from the inner surface of the sleeve 200. The sixth limiting member is a second compression ring 20, and the second compression ring 20 is sleeved inside the sleeve 200 and presses against the first outer ring 420. With the above structural form, the fifth limiting member 202 is integrally formed with the sleeve 200, with a simple structure, which is convenient for limiting the first outer ring 420 of the first bearing 400. The sixth limiting member is a first compression ring 10, which can be separated from the sleeve 200, facilitating the installation of the sleeve 200 on the first bearing 400.

[0131] In this embodiment, the first pressing ring 10 and the second pressing ring 20 are installed with limited positions through the end fixing ring 30 to prevent them from falling off. The end fixing ring 30 is fixed to the end of the wall of the sleeve 200 by bolts. The end fixing ring 30 extends radially on both sides along the sleeve 200 and presses against the first pressing ring 10 and the second pressing ring 20, so that the first pressing ring 10 presses against the second inner ring 610, and the second pressing ring 20 presses against the first outer ring 420.

[0132] In other embodiments, the first pressing ring 10 and the second pressing ring 20 can also be fixed on the sleeve by means of threaded connection or the like to limit the second inner ring 610 and the first outer ring 420.

[0133] As Figure 1 and Figure 4 shown, in this embodiment, the rotor 100 is provided with a first mounting flange 120, and the stator 300 is provided with a second mounting flange 320. The rotor 100 is provided with a first mounting flange 120 to facilitate fixing the rotor 100 of the slip ring device on the measured rotor. The stator 300 is provided with a second mounting flange 320 to facilitate fixing the stator 300 of the slip ring device to an external stationary component.

[0134] In this embodiment, the first bearing 400 is a deep groove ball bearing. The inner ring and the outer ring of the deep groove ball bearing can bear axial loads and will not undergo axial displacement, but only circumferential rotation can occur.

[0135] In other embodiments, the first bearing 400 can also be other bearings with similar functions, such as back-to-back angular contact ball bearings.

[0136] As Figure 1 shown, there are multiple brush 500 slots 110 and they are evenly arranged along the axial direction of the rotor 100. Each brush 500 slot 110 is of an annular structure. Setting multiple brush 500 slots 110 can monitor multiple groups of signals of the measured rotor simultaneously.

[0137] The present invention also provides an aeroengine, and this aeroengine includes the above-mentioned slip ring device. The signals of some rotors 100 in the aeroengine are monitored through this slip ring device.

[0138] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that this is only for illustration. The protection scope of the present invention is defined by the appended claims. Without departing from the principles and essence of the present invention, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A slip ring device, characterized in that, The slip ring device includes a rotor, a first bearing, a sleeve, and a stator. The sleeve is sleeved outside the rotor. The first bearing is provided between the sleeve and the rotor. The first bearing includes a relatively rotatable first inner ring and a first outer ring. The first inner ring is fixedly connected to the rotor, and the first outer ring is fixedly connected to the sleeve. The first inner ring and the first outer ring move synchronously in the axial direction so that only rotation occurs between the sleeve and the rotor, and no axial movement is generated. The stator is provided on the outer peripheral side of the sleeve, and the stator and the sleeve can generate relative displacement in the axial direction. The slip ring device further includes a brush. The brush is fixed to the inner surface of the sleeve, and a brush groove adapted to the brush is provided on the outer surface of the rotor.

2. The slip ring device according to claim 1, wherein, The slip ring device further includes a limiting mechanism for limiting the length of the axial displacement of the sleeve relative to the stator.

3. The slip ring device according to claim 1, wherein, The slip ring device further includes an elastic support member provided between the stator and the sleeve. One end of the elastic support member is fixedly connected to the stator, and the other end of the elastic support member is slidably provided on the outer surface of the sleeve.

4. The slip ring device according to claim 1, characterized in that, The stator is of a cylindrical structure and is sleeved outside the sleeve.

5. The slip ring device according to claim 4, wherein A wiring hole is provided on the side wall of the stator. A signal line is connected to the brush, and the signal line passes through the wiring hole and is connected to an external signal receiving device.

6. The slip ring device according to claim 4, characterized in that, The slip ring device further includes a second bearing provided between the sleeve and the stator. The second bearing includes a second inner ring and a second outer ring. The second inner ring is fixedly connected to the sleeve, and the second outer ring is fixedly connected to the stator. The second inner ring and the second outer ring can move relatively in the axial direction.

7. The slip ring device according to claim 6, characterized in that, The slip ring device further includes an elastic support member provided between the stator and the sleeve. The elastic support member has a first mounting portion extending radially along the sleeve and a second mounting portion extending axially along the sleeve. The first mounting portion is fixedly connected to the stator, and the second mounting portion is fixedly connected to the second outer ring.

8. The slip ring device according to claim 7, characterized in that, The slip ring device further includes a limiting mechanism for limiting the length of the axial displacement of the sleeve relative to the stator. The limiting mechanism includes a fixing member and an elastic member. The fixing member is fixedly connected to the stator or the elastic support member. One end of the elastic member is connected to the fixing member, and the other end of the elastic member is fixedly connected to the sleeve.

9. The slip ring device according to claim 8, wherein, The elastic support member has a first pressing portion, and the fixing member has a second pressing portion. Both ends of the second outer ring are respectively abutted against the first pressing portion and the second pressing portion.

10. The slip ring device according to claim 6, wherein, Both ends of the outer peripheral surface of the sleeve have second mounting platforms for mounting the second bearing. The sleeve is respectively provided with a first limiting member and a second limiting member on both sides of the second bearing. The first limiting member and the second limiting member are used to fix the second inner ring on the sleeve.

11. The slip ring device according to claim 10, characterized in that, The first limiting member is a convex platform protruding radially outward from the outer surface of the sleeve. And / or, the second limiting member is a pressing ring which is sleeved outside the sleeve and presses against the second inner ring.

12. The slip ring device according to claim 6, wherein, The second bearing is a cylindrical roller bearing.

13. The slip ring device according to claim 1, characterized in that, A limiting groove is provided on the sleeve, and an anti-rotation member is fixed on the stator. The anti-rotation member is inserted into the limiting groove to prevent the sleeve from rotating.

14. The slip ring device according to claim 1, characterized in that, Both ends of the outer peripheral surface of the rotor have first mounting platforms for mounting the first bearings. A third limiting member and a fourth limiting member are respectively provided on both sides of the first bearing on the rotor. The third limiting member and the fourth limiting member are used to fix the first inner ring on the rotor.

15. The slip ring device according to claim 14, characterized in that, The third limiting member is a boss radially protruding outward from the outer surface of the rotor. And / or, the fourth limiting member is a pressing nut which is sleeved outside the rotor and presses against the first inner ring.

16. The slip ring device according to claim 1, wherein, A fifth limiting member and a sixth limiting member are respectively provided on both sides of the first bearing on the inner surface of the sleeve. The fifth limiting member and the sixth limiting member are used to fix the first outer ring on the sleeve.

17. The slip ring device according to claim 16, characterized in that, The fifth limiting member is a boss radially protruding inward from the inner surface of the sleeve. And / or, the sixth limiting member is a pressing ring which is sleeved inside the sleeve and presses against the first outer ring.

18. The slip ring device according to claim 1, characterized in that, A first mounting flange is provided on the rotor, and a second mounting flange is provided on the stator.

19. The slip ring device according to claim 1, characterized in that, The first bearing is a deep groove ball bearing or a pair of angular contact ball bearings.

20. The slip ring device according to claim 1, characterized in that, There are multiple brush grooves which are evenly arranged along the axial direction of the rotor.

21. An aeroengine, characterized in that, The aeroengine includes a slip ring device as described in any one of claims 1-20.

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