Brush type sealing detection device and gas turbine

Abstract

The invention discloses a brush type sealing detection device and a gas turbine, the brush type sealing detection device comprises a fixing ring, a first brush wire, a second brush wire and an electric signal acquisition device, a gap is arranged between the second brush wire and the first brush wire, the outer end of the first brush wire and the outer end of the second brush wire are both connected with the fixing ring, and the electric signal acquisition device is arranged between the first brush wire and the second brush wire. A first friction end is formed at the inner end of the first brush wire, a second friction end is formed at the inner end of the second brush wire, the material of the second friction end is different from that of the first friction end, the first brush wire is provided with a first conductive part electrically connected with the first friction end, and the second brush wire is provided with a second conductive part electrically connected with the second friction end. The second brush wire is provided with a second conductive part electrically connected with the second friction end; and the first conductive part and the second conductive part are electrically connected with the electric signal acquisition device. According to the brush type sealing detection device, the problem that the abrasion state of the brush wires is difficult to measure is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of brush seals, and particularly relates to a brush seal detection device and a gas turbine. Background Art

[0002] A brush seal is a flexible contact seal, mainly composed of a front splint, a brush wire bundle, and a rear splint. The brush wire bundle is composed of closely arranged brush wires. The front splint can play a role in fixing and protecting the brush wires; the rear splint plays a role in supporting the brush wires, so that the brush wire bundle can avoid large axial deformation under the action of aerodynamic force, thereby maintaining stable sealing performance. At present, brush seals have been widely used in turbomachinery such as aeroengines, gas turbines, and steam turbines. The quality of its sealing performance is mainly reflected in its sealing characteristics. The leakage amount and friction state of the brush seal can be used to measure the effect of its sealing characteristics.

[0003] However, since the brush seal belongs to a contact seal, its leakage amount is extremely small, resulting in great difficulty in measuring the leakage amount. Moreover, since the brush seal is generally installed inside the cylinder block, it further increases the difficulty of measuring the leakage amount. The leakage amount of the brush seal is closely related to the friction state of the brush wires. By measuring the friction state of the brush wires, the leakage amount situation can be indirectly obtained. In related technologies, the friction state of the brush wires is measured by measuring the temperature of the contact surface in contact with the brush wires. However, due to the small area of the contact surface and the insignificant temperature change, it is difficult to measure the wear state of the brush wires. Summary of the Invention

[0004] The present invention provides a brush seal detection device to reduce the difficulty of measuring the wear state of the brush wires of the brush seal.

[0005] The brush seal detection device of the present invention includes a fixing ring, a first brush wire, a second brush wire, and an electrical signal acquisition device. There is a gap between the second brush wire and the first brush wire. The outer ends of the first brush wire and the second brush wire are both connected to the fixing ring. The inner end of the first brush wire forms a first friction end, and the inner end of the second brush wire forms a second friction end. The material of the second friction end is different from that of the first friction end. The first brush wire has a first conductive part electrically connected to the first friction end, and the second brush wire has a second conductive part electrically connected to the second friction end. Both the first conductive part and the second conductive part are electrically connected to the electrical signal acquisition device to collect the current signal between the first conductive part and the second conductive part.

[0006] Optionally, the first brush filament includes a first brush filament body and a first conductive layer. The first brush filament body is an insulating brush filament, and the first conductive layer covers at least a part of the first brush filament body to form the first conductive part; the second brush filament includes a second brush filament body and a second conductive layer. The second brush filament body is an insulating brush filament, and the second conductive layer covers at least a part of the second brush filament body to form the second conductive part.

[0007] Optionally, the first brush filament further includes a first friction layer, and the first friction layer covers the inner end of the first brush filament body to form the first friction end; the second brush filament further includes a second friction layer, and the second friction layer covers the inner end of the second brush filament body to form the second friction end.

[0008] Optionally, the width of the first friction layer is greater than or equal to the diameter of the first brush filament body; thus, the width of the second friction layer is greater than or equal to the diameter of the second brush filament body.

[0009] Optionally, the brush-type seal detection device further includes a plurality of third brush filaments. The plurality of third brush filaments are evenly arranged along the circumferential direction of the fixed ring. The third brush filaments are insulating brush filaments. The outer ends of the third brush filaments are connected to the fixed ring, and the inner ends of the third brush filaments form third friction ends; the third brush filaments are disposed between the first brush filaments and the second brush filaments.

[0010] Optionally, the first brush filament and the second brush filament are arranged at intervals along the axial direction of the fixed ring, and the third brush filaments are disposed between the first brush filament and the second brush filament in the axial direction of the fixed ring.

[0011] Optionally, the first brush filament is disposed between two adjacent third brush filaments in the circumferential direction of the fixed ring; and / or, the second brush filament is disposed between two adjacent third brush filaments in the circumferential direction of the fixed ring.

[0012] Optionally, the brush-type seal detection device further includes a plurality of fourth brush filaments. The plurality of fourth brush filaments are evenly arranged along the circumferential direction of the fixed ring. The fourth brush filaments are insulating brush filaments. The outer ends of the fourth brush filaments are connected to the fixed ring, and the inner ends of the fourth brush filaments form fourth friction ends; the fourth brush filaments are disposed on the side of the first brush filament away from the second brush filament in the axial direction of the fixed ring, and / or, the fourth brush filaments are disposed on the side of the second brush filament away from the first brush filament in the axial direction of the fixed ring.

[0013] Optionally, the first brush filament is disposed between two adjacent fourth brush filaments in the circumferential direction of the fixed ring; and / or, the second brush filament is disposed between two adjacent fourth brush filaments in the circumferential direction of the fixed ring.

[0014] Optionally, the brush seal detection device includes a detection brush wire group, and the detection brush wire group includes the first brush wire and the second brush wire; the number of the detection brush wire groups and the electrical signal acquisition device are both multiple, and the multiple detection brush wire groups are arranged at equal intervals along the circumference of the fixed ring, and the electrical signal acquisition device is connected to the detection brush wire group in one-to-one correspondence.

[0015] Optionally, the fixed ring includes a first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate are arranged at intervals along the axial direction of the fixed ring, and the first brush wire and the second brush wire are clamped between the first clamping plate and the second clamping plate; both the first conductive part and the second conductive part are connected to the electrical signal acquisition device through wires, and at least one of the first clamping plate and the second clamping plate is provided with a lead hole for the wire to pass through.

[0016] The present invention also provides a gas turbine.

[0017] The gas turbine of the present invention includes a stator, a rotor and a brush seal detection device, and the rotor is rotatably connected to the stator; the brush seal detection device is the brush seal detection device described in any one of the above, the fixed ring is connected to the stator, and the first friction end and the second friction end are in contact with the surface of the rotor.

[0018] When the brush seal detection device of the present invention is in use, the fixed ring is connected to the first component, and the first friction end and the second friction end are in contact with the second component. When the first component rotates relative to the second component, the first friction end and the second friction end are in contact and friction with the second component to generate charges. By setting the materials of the first friction end and the second friction end to be different, different charges can be generated between the first friction end and the second friction end, that is, one of the first friction end and the second friction end generates positive charges and the other generates negative charges. By providing a first conductive part electrically connected to the first friction end on the first brush wire, a second conductive part electrically connected to the second friction end on the second brush wire, and the electrical signal acquisition device is connected to both the first conductive part and the second conductive part, the current signal between the first friction end and the second friction end can be collected, and the wear states of the first friction end and the second friction end can be judged through the collected current signal. Thus, the real-time and dynamic detection of the wear state of the brush seal brush wire is realized, and the response is sensitive, solving the problem of difficult measurement of the wear state of the brush wire. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the brush seal detection device in a use state according to an embodiment of the present invention.

[0020] Figure 2 is a partial cross-sectional view of the brush seal detection device in a use state according to an embodiment of the present invention.

[0021] Figure 3 is Figure 2 a partially enlarged view of.

[0022] Figure 4 is a cross-sectional view of a brush seal detection device according to an embodiment of the present invention in a working state.

[0023] Reference numerals:

[0024] 1. Fixed ring; 11. First clamping plate; 111. First lead hole; 12. Second clamping plate; 121. Second lead hole; 13. Connecting plate;

[0025] 2. First brush wire; 21. First friction end; 22. First conductive part; 23. First brush wire body; 24. First conductive layer; 25. First friction layer;

[0026] 3. Second brush wire; 31. Second friction end; 32. Second conductive part; 33. Second brush wire body; 34. Second conductive layer; 35. Second friction layer;

[0027] 4. Electrical signal acquisition device; 41. First wire; 42. Second wire;

[0028] 5. Third brush wire; 51. Third friction end;

[0029] 6. Fourth brush wire; 61. Fourth friction end;

[0030] 7. Rotor; 71. First pair of rubbing parts; 72. Second pair of rubbing parts;

[0031] 8. Computer. Detailed implementation manners

[0032] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0033] As Figures 1 to 4As shown in the figure, the brush seal detection device of the embodiment of the present invention includes a fixed ring 1, a first brush wire 2, a second brush wire 3, and an electrical signal acquisition device 4. There is a gap between the second brush wire 3 and the first brush wire 2. The outer ends of the first brush wire 2 and the second brush wire 3 are both connected to the fixed ring 1. The inner end of the first brush wire 2 forms a first friction end 21, and the inner end of the second brush wire 3 forms a second friction end 31. The material of the second friction end 31 is different from that of the first friction end 21. The first brush wire 2 has a first conductive part 22 electrically connected to the first friction end 21, and the second brush wire 3 has a second conductive part 32 electrically connected to the second friction end 31. Both the first conductive part 22 and the second conductive part 32 are electrically connected to the electrical signal acquisition device 4 to collect the current signal between the first conductive part 22 and the second conductive part 32.

[0034] The material of the second friction end 31 is different from that of the first friction end 21, so that when the second friction end 31 and the first friction end 21 rub against the same surface, different types of charges are generated. For example, the first friction end 21 uses a positive-polarity material, and the second friction end 31 uses a negative-polarity material, so that the first friction end 21 generates positive charges and the second friction end 31 generates negative charges.

[0035] When the brush seal detection device of the embodiment of the present invention is in use, the fixed ring 1 is connected to the first component, and the first friction end 21 and the second friction end 31 are in contact with the second component. When the first component rotates relative to the second component, the first friction end 21 and the second friction end 31 rub against the second component to generate charges. By setting the materials of the first friction end 21 and the second friction end 31 to be different, different charges can be generated between the first friction end 21 and the second friction end 31, that is, one of the first friction end 21 and the second friction end 31 generates positive charges and the other generates negative charges. By providing a first conductive part 22 electrically connected to the first friction end 21 on the first brush wire 2, a second conductive part 32 electrically connected to the second friction end 31 on the second brush wire 3, and connecting the electrical signal acquisition device 4 to both the first conductive part 22 and the second conductive part 32, the current signal between the first friction end 21 and the second friction end 31 can be collected, and the wear states of the first friction end 21 and the second friction end 31 can be judged through the collected current signal. Thus, the real-time and dynamic detection of the wear state of the brush seal brush wire is realized, and the reaction is sensitive, solving the problem of the great difficulty in measuring the wear state of the brush wire.

[0036] For example, the fixed ring 1 is connected to the rotor of the gas turbine, the first friction end 21 and the second friction end 31 are in contact with the surface of the stator. When the rotor rotates relative to the stator, the first friction end 21 and the second friction end 31 are in contact with and rub against the surface of the stator to generate electric charges. When the collected current signal is a stable current signal, it is determined that the wear of the first brush wire 2 and the second brush wire 3 is relatively light; when the collected current signal is an unstable current signal, it is determined that the wear of the first brush wire 2 and the second brush wire 3 is severe.

[0037] Among them, a stable current signal can be understood as: the current signal fluctuates within a small range; an unstable current signal can be understood as: the current signal fluctuates within a large range.

[0038] Optionally, as Figure 1 shown, the brush-type seal detection device includes a detection brush wire group. The detection brush wire group includes a first brush wire 2 and a second brush wire 3. The number of the detection brush wire groups and the electrical signal acquisition device 4 are both multiple. The multiple detection brush wire groups are arranged at equal intervals along the circumferential direction of the fixed ring 1, and the electrical signal acquisition device 4 is connected to the detection brush wire group in a one-to-one correspondence.

[0039] For example, as Figure 1 shown, the detection brush wire group includes one first brush wire 2 and one second brush wire 3. The number of the detection brush wire groups and the electrical signal acquisition device 4 are both four. The four detection brush wire groups are arranged at equal intervals along the circumferential direction of the fixed ring 1. Each electrical signal acquisition device 4 is used to collect the current signal of the corresponding detection brush wire group. At this time, when judging the wear state of the brush wire according to the current signal collected by the electrical signal acquisition device 4, when the current signal collected by one of the electrical signal acquisition devices 4 is unstable, it is determined that the brush wire is severely worn; of course, it is also possible to average the current signals collected by multiple electrical signal acquisition devices 4. When the average value is unstable, it is determined that the brush wire is severely worn.

[0040] By providing multiple detection brush wire groups and multiple electrical signal acquisition devices 4, the measurement accuracy of the wear state of the brush wire can be improved, and the wear state of the brush wire can be judged more accurately.

[0041] Optionally, as Figure 2 and Figure 3 shown, the first conductive part 22 and the second conductive part 32 are both connected to the electrical signal acquisition device 4 through wires. The fixed ring 1 includes a first clamping plate 11 and a second clamping plate 12. The first clamping plate 11 and the second clamping plate 12 are arranged at intervals along the axial direction of the fixed ring 1. The first brush wire 2 and the second brush wire 3 are clamped between the first clamping plate 11 and the second clamping plate 12. At least one of the first clamping plate 11 and the second clamping plate 12 is provided with a lead hole for the wire to pass through.

[0042] For example, as Figure 2As shown, the first conductive part 22 is connected to the electrical signal acquisition device 4 through the first wire 41, and the second conductive part 32 is connected to the electrical signal acquisition device 4 through the second wire 42. Both the first clamping plate 11 and the second clamping plate 12 are provided with lead holes. Among them, the lead hole provided on the first clamping plate 11 is the first lead hole 111, and the first wire 41 passes through the first lead hole 111; the lead hole provided on the second clamping plate 12 is the second lead hole 121, and the second wire 42 passes through the second lead hole 121.

[0043] By providing lead holes in at least one of the first clamping plate 11 and the second clamping plate 12 and passing the wires connected to the electrical signal acquisition device 4 through the lead holes, the lead holes can be used to limit the wires, making the arrangement of the wires neater and effectively avoiding interference between the wires and the brush filaments.

[0044] The fixing ring 1 further includes a connecting plate 13. One end of the connecting plate 13 is connected to the first clamping plate 11, and the other end of the connecting plate 13 is connected to the second clamping plate 12. Among them, the outer ends of the first brush filaments 2 and the second brush filaments 3 are both located in the cavity surrounded by the first clamping plate 11, the second clamping plate 12 and the connecting plate 13, realizing the limitation and protection of the first brush filaments 2 and the second brush filaments 3 and improving the reliability of the brush-type seal detection device.

[0045] Optionally, as Figure 3 shown, the first brush filament 2 includes a first brush filament body 23 and a first conductive layer 24. The first brush filament body 23 is an insulating brush filament, and the first conductive layer 24 is coated on at least a part of the first brush filament body 23 to form the first conductive part 22. Among them, the first conductive layer 24 can be formed on the first brush filament body 23 by methods such as spraying.

[0046] For example, the material of the first brush filament body 23 is an insulating material with good flexibility and certain mechanical strength, such as polyethylene, polyvinyl chloride, polymethyl methacrylate, phenolic resin, epoxy resin, vulcanized rubber or silicone rubber, etc. The material of the first conductive layer 24 can include one or several of chromium, gold, nickel and copper, or can also be graphene, etc.

[0047] By setting the first brush filament body 23 as an insulating brush filament, on the one hand, the weight and cost of the first brush filament 2 can be reduced, and the service life of the first brush filament 2 can be extended; on the other hand, the insulation performance between the first brush filament 2 and the second brush filament 3 can be improved, and the reliability of the brush-type seal detection device can be improved.

[0048] Optionally, the first brush filament 2 further includes a first friction layer 25, and the first friction layer 25 is coated on the inner end of the first brush filament body 23 to form the first friction end 21.

[0049] For example, the material of the first friction layer 25 includes one or more of a polyurethane nanofiber membrane, a polyimide nanofiber membrane, a cellulose nanofiber membrane, a polystyrene-based nanofiber membrane, a polyvinyl alcohol nanofiber membrane, and a polyvinylpyrrolidone nanofiber membrane. Among them, the first friction layer 25 can be formed on the first brush filament body 23 by methods such as spraying.

[0050] By providing the first friction layer 25 on the first brush filament 2 and forming the first friction end 21 with the first friction layer 25, the wear resistance of the first friction end 21 can be improved, and the service life of the first brush filament 2 can be extended.

[0051] Optionally, the width of the first friction layer 25 is greater than or equal to the diameter of the first brush filament body 23.

[0052] Among them, the width direction of the first friction layer 25 can also be consistent with the axial, radial, or circumferential direction of the fixing ring 1, or can intersect with the axial, radial, or circumferential direction of the fixing ring 1.

[0053] By setting the width of the first friction layer 25 to be greater than or equal to the diameter of the first brush filament body 23, the area of the first friction layer 25 in contact with the second component is larger, so that the contact reliability between the first friction end 21 and the second component can be increased, and the reliability of the brush seal detection device can be improved.

[0054] Optionally, the second brush filament 3 includes a second brush filament body 33 and a second conductive layer 34. The second brush filament body 33 is an insulating brush filament, and the second conductive layer 34 is coated on at least a part of the second brush filament body 33 to form a second conductive part 32.

[0055] For example, the material of the second brush filament body 33 is made of an insulating material with good flexibility and certain mechanical strength, such as polyethylene, polyvinyl chloride, polymethyl methacrylate, phenolic resin, epoxy resin, vulcanized rubber, or silicone rubber, etc. The material of the second conductive layer 34 can include one or more of chromium, gold, nickel, and copper, or can also be graphene, etc. Among them, the second conductive layer 34 can be formed on the second brush filament body 33 by methods such as spraying.

[0056] By setting the second brush filament body 33 as an insulating brush filament, on the one hand, the weight and cost of the second brush filament 3 can be reduced, and the service life of the second brush filament 3 can be extended; on the other hand, the insulation performance between the second brush filaments 3 can be improved, and the reliability of the brush seal detection device can be improved.

[0057] Optionally, the second brush filament 3 further includes a second friction layer 35, and the second friction layer 35 covers the inner end of the second brush filament body 33 to form a second friction end 31.

[0058] For example, the material of the second friction layer 35 includes one or more of a polyvinylidene fluoride nanofiber membrane, a polyvinylidene fluoride copolymer nanofiber membrane, a polyvinylidene fluoride nanomaterial fiber composite membrane, a polytetrafluoroethylene electret nanofiber membrane, a polypropylene electret nanofiber membrane, and a polyester electret nanofiber membrane. Among them, the second friction layer 35 can be formed on the second brush wire body 33 by methods such as spraying.

[0059] By providing the second friction layer 35 on the second brush wire 3 and forming the second friction end 31 with the second friction layer 35, the wear resistance of the second friction end 31 can be improved, and the service life of the second brush wire 3 can be extended.

[0060] Optionally, the width of the second friction layer 35 is greater than or equal to the diameter of the second brush wire body 33.

[0061] Among them, the width direction of the second friction layer 35 can also be consistent with the axial, radial, or circumferential direction of the fixing ring 1, or can intersect with the axial, radial, or circumferential direction of the fixing ring 1.

[0062] By setting the width of the second friction layer 35 to be greater than or equal to the diameter of the second brush wire body 33, the area of the second friction layer 35 for contacting the second component is relatively large, so that the contact reliability between the second friction end 31 and the second component can be increased, and the reliability of the brush seal detection device can be improved.

[0063] Optionally, the thickness of the first friction layer 25 is 5 μm to 10 μm, the thickness of the first conductive layer 24 is 5 μm to 10 μm, and the diameter of the first brush wire body 23 is 50 μm to 100 μm.

[0064] Optionally, the thickness of the second friction layer 35 is 5 μm to 10 μm, the thickness of the second conductive layer 34 is 5 μm to 10 μm, and the diameter of the second brush wire body 33 is 50 μm to 100 μm.

[0065] In some embodiments, the brush seal detection device further includes a plurality of third brush wires 5. The third brush wires 5 are insulating brush wires, and the plurality of third brush wires 5 are uniformly arranged along the circumferential direction of the fixing ring 1. The outer ends of the third brush wires 5 are connected to the fixing ring 1, and the inner ends of the third brush wires 5 form third friction ends 51. The third brush wires 5 are disposed between the first brush wires 2 and the second brush wires 3.

[0066] Among them, the third brush wires 5 are working brush wires for sealing, and the first brush wires 2 and the second brush wires 3 are detection brush wires for detecting the wear state of the brush wires.

[0067] By setting the third brush wire 5 as an insulating brush wire and arranging the third brush wire 5 between the first brush wire 2 and the second brush wire 3, not only can the third brush wire 5 be used to separate the first brush wire 2 and the second brush wire 3, avoiding a short circuit between the first brush wire 2 and the second brush wire 3 and improving the reliability of the brush seal detection device; but also the layout compactness of the first brush wire 2, the second brush wire 3 and the third brush wire 5 can be improved, reducing the volume of the brush seal detection device.

[0068] Optionally, the first brush wire 2 and the second brush wire 3 are arranged at intervals along the axial direction of the fixing ring 1, and the third brush wire 5 is arranged between the first brush wire 2 and the second brush wire 3 in the axial direction of the fixing ring 1.

[0069] By arranging the third brush wire 5 between the first brush wire 2 and the third brush wire 5 in the axial direction of the fixing ring 1, only the third brush wire 5 can be arranged in a circle around the circumference of the fixing ring 1, thus facilitating the uniform arrangement of the third brush wire 5 along the circumference of the fixing ring 1 and facilitating the design and manufacture of the brush seal detection device.

[0070] Of course, in some other embodiments, the first brush wire 2 and the second brush wire 3 can also be arranged at intervals along the circumferential direction of the fixing ring 1, and the third brush wire 5 is arranged between the first brush wire 2 and the second brush wire 3 in the circumferential direction of the fixing ring 1.

[0071] Optionally, the first brush wire 2 is arranged between two adjacent third brush wires 5 in the circumferential direction of the fixing ring 1.

[0072] By arranging the first brush wire 2 between two adjacent third brush wires 5 in the circumferential direction of the fixing ring 1, the layout compactness of the first brush wire 2 and the third brush wire 5 can be further improved, reducing the volume of the brush seal detection device.

[0073] Optionally, the second brush wire 3 is arranged between two adjacent third brush wires 5 in the circumferential direction of the fixing ring 1.

[0074] By arranging the second brush wire 3 between two adjacent third brush wires 5 in the circumferential direction of the fixing ring 1, the layout compactness of the second brush wire 3 and the third brush wire 5 can be further improved, reducing the volume of the brush seal detection device.

[0075] Optionally, as Figure 2 and Figure 3 shown, the brush seal detection device further includes a plurality of fourth brush wires 6, and the plurality of fourth brush wires 6 are uniformly arranged along the circumferential direction of the fixing ring 1. The fourth brush wire 6 is an insulating brush wire, the outer end of the fourth brush wire 6 is connected to the fixing ring 1, and the inner end of the fourth brush wire 6 forms a fourth friction end 61. The fourth brush wire 6 is arranged on the side of the first brush wire 2 away from the second brush wire 3 in the axial direction of the fixing ring 1, and / or the fourth brush wire 6 is arranged on the side of the second brush wire 3 away from the first brush wire 2 in the axial direction of the fixing ring 1.

[0076] Among them, the fourth brush wire 6 is a working brush wire that plays a sealing role.

[0077] For example, as Figure 2 and Figure 3 shown, a part of the fourth brush wire 6 is arranged on the axial direction of the fixed ring 1 on the side of the first brush wire 2 away from the second brush wire 3, and another part of the fourth brush wire 6 is arranged on the axial direction of the fixed ring 1 on the side of the second brush wire 3 away from the first brush wire 2. That is, the first brush wire 2 is arranged on the axial direction of the fixed ring 1 between the third brush wire 5 and a part of the fourth brush wire 6, and the third brush wire 5 is arranged on the axial direction of the fixed ring 1 between the third brush wire 5 and another part of the fourth brush wire 6.

[0078] By setting the fourth brush wire 6, the sealing performance of the brush type sealing detection device can be improved.

[0079] Optionally, the first brush wire 2 is arranged in the circumferential direction of the fixed ring 1 between two adjacent fourth brush wires 6.

[0080] By arranging the first brush wire 2 in the circumferential direction of the fixed ring 1 between two adjacent fourth brush wires 6, the layout compactness of the first brush wire 2 and the fourth brush wire 6 can be further improved, and the volume of the brush type sealing detection device can be reduced.

[0081] Optionally, the second brush wire 3 is arranged in the circumferential direction of the fixed ring 1 between two adjacent fourth brush wires 6.

[0082] By arranging the second brush wire 3 in the circumferential direction of the fixed ring 1 between two adjacent fourth brush wires 6, the layout compactness of the second brush wire 3 and the fourth brush wire 6 can be further improved, and the volume of the brush type sealing detection device can be reduced.

[0083] Optionally, as Figure 1 and Figure 2 shown, the electrical signal acquisition device 4 is connected to the computer 8, the current signal collected by the electrical signal acquisition device 4 is transmitted to the computer 8, and the computer 8 judges the wear state of the brush wire according to the received current signal.

[0084] The gas turbine of the embodiment of the present invention includes a stator, a rotor 7 and a brush type sealing detection device, and the rotor 7 is rotatably connected to the stator. The brush type sealing detection device is the brush type sealing detection device of any one of the above embodiments, the fixed ring 1 is connected to the stator, and the first friction end 21 and the second friction end 31 are in contact with the surface of the rotor 7.

[0085] As Figure 2 and Figure 3As shown, the rotor 7 has a first pair of grinding portions 71 and a second pair of grinding portions 72. The first friction end 21 contacts the first pair of grinding portions 71, and the second friction end 31 contacts the second pair of grinding portions 72. The first friction end 21 and the second friction end 31 contact the surface of the rotor 7, such that triboelectrification occurs between the first friction end 21 and the rotor 7, and triboelectrification occurs between the second friction end 31 and the rotor 7.

[0086] As Figure 4 shown, the rotation direction of the rotor 7 is ω, the flow direction of the air flow is A, and the brush seal detection device functions to seal the air flow between the rotor 7 and the stator.

[0087] By connecting the brush seal detection device to the stator of the gas turbine, the first friction end 21 and the second friction end 31 contact the surface of the rotor 7 of the gas turbine, enabling the detection of the wear state of the brush filaments of the brush seal of the gas turbine, and thereby indirectly realizing the detection of the leakage amount of the brush seal in the gas turbine.

[0088] The brush seal detection device of the embodiment of the present invention is based on the principle of triboelectrification and uses the electrical signal generated by the friction between the brush filaments and the surface of the rotor 7 for detection. It can achieve real-time and dynamic detection of the wear state of the brush filaments, with sensitive response, and can obtain triboelectric signals at the initial stage of the wear of the brush filaments of the brush seal, diagnosing the friction state of the contact surface of the brush seal, solving the problem of difficult measurement of the wear state of the brush seal. Moreover, it can indirectly realize the detection of the leakage amount of the brush seal under the condition of not opening the cylinder.

[0089] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions, and variations made by those of ordinary skill in the art to the above embodiments are within the protection scope of the present invention.

Claims

1. A brush seal detection device, characterized in that: include: Fixed ring; a first brush wire and a second brush wire, wherein the second brush wire and the first brush wire are spaced apart from each other, the outer ends of the first brush wire and the outer ends of the second brush wire are both connected to the fixing ring, the inner end of the first brush wire forms a first friction end, the inner end of the second brush wire forms a second friction end, the material of the second friction end is different from that of the first friction end, the first brush wire has a first conductive portion electrically connected to the first friction end, and the second brush wire has a second conductive portion electrically connected to the second friction end; An electrical signal acquisition device, wherein the first conductive part and the second conductive part are both electrically connected to the electrical signal acquisition device to acquire a current signal between the first conductive part and the second conductive part.

2. The brush seal detection device according to claim 1, characterized in that: The first brush wire comprises a first brush wire body and a first conductive layer, the first brush wire body is an insulating brush wire, and the first conductive layer covers at least a portion of the first brush wire body to form the first conductive portion; The second brush wire includes a second brush wire body and a second conductive layer. The second brush wire body is an insulating brush wire. The second conductive layer covers at least a portion of the second brush wire body to form the second conductive portion.

3. The brush seal detection device according to claim 2, characterized in that: The first brush wire further includes a first friction layer, wherein the first friction layer covers the inner end of the first brush wire body to form the first friction end; The second brush filament further includes a second friction layer, and the second friction layer covers the inner end of the second brush filament body to form the second friction end.

4. The brush seal detection device according to claim 3, characterized in that: The width of the first friction layer is greater than or equal to the diameter of the first brush body; Therefore, the width of the second friction layer is greater than or equal to the diameter of the second brush filament body.

5. The brush seal detection device according to claim 1, characterized in that: The brush seal detection device further includes a plurality of third brush wires, the plurality of third brush wires are evenly arranged along the circumference of the fixing ring, the third brush wires are insulating brush wires, the outer ends of the third brush wires are connected to the fixing ring, and the inner ends of the third brush wires form third friction ends; The third brush filaments are arranged between the first brush filaments and the second brush filaments.

6. The brush seal detection device according to claim 5, characterized in that: The first brush filaments and the second brush filaments are arranged at intervals along the axial direction of the fixing ring, and the third brush filaments are arranged between the first brush filaments and the second brush filaments in the axial direction of the fixing ring.

7. The brush seal detection device according to claim 6, characterized in that: The first brush wire is arranged between two adjacent third brush wires in the circumferential direction of the fixing ring; and / or The second brush filaments are arranged between two adjacent third brush filaments in the circumferential direction of the fixing ring.

8. The brush seal detection device according to claim 6, characterized in that: The brush seal detection device further includes a plurality of fourth brush wires, the plurality of fourth brush wires are evenly arranged along the circumference of the fixing ring, the fourth brush wires are insulating brush wires, the outer ends of the fourth brush wires are connected to the fixing ring, and the inner ends of the fourth brush wires form fourth friction ends; The fourth brush filaments are arranged on a side of the first brush filaments away from the second brush filaments in the axial direction of the fixing ring, and / or the fourth brush filaments are arranged on a side of the second brush filaments away from the first brush filaments in the axial direction of the fixing ring.

9. The brush seal detection device according to claim 8, characterized in that: The first brush wire is arranged between two adjacent fourth brush wires in the circumferential direction of the fixing ring; and / or The second brush filaments are arranged between two adjacent fourth brush filaments in the circumferential direction of the fixing ring.

10. The brush seal detection device according to any one of claims 1 to 9, characterized in that: The brush seal detection device comprises a detection brush wire group, and the detection brush wire group comprises the first brush wire and the second brush wire; There are multiple detection brush groups and multiple electrical signal acquisition devices, and the multiple detection brush groups are evenly spaced along the circumference of the fixed ring. The electrical signal acquisition devices are connected to the detection brush groups in a one-to-one correspondence.

11. The brush seal detection device according to any one of claims 1 to 9, characterized in that: The fixing ring comprises a first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate are arranged at intervals along the axial direction of the fixing ring, and the first brush filament and the second brush filament are clamped between the first clamping plate and the second clamping plate; The first conductive part and the second conductive part are both connected to the electrical signal acquisition device through a wire, and at least one of the first clamping plate and the second clamping plate is provided with a lead hole for the wire to pass through.

12. A gas turbine, characterized in that: include: stator; a rotor rotatably connected to the stator; A brush seal detection device, wherein the brush seal detection device is the brush seal detection device described in any one of claims 1 to 11, wherein the fixing ring is connected to the stator, and the first friction end and the second friction end are in contact with the surface of the rotor.

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