Heating device and dynamic characteristic test system

Abstract

The invention relates to the technical field of aero-engines, and discloses a heating device and a dynamic characteristic test system.The heating device comprises a box body, the interior of the box body is provided with a heating cavity, one end, in the axial direction of a rotating shaft, of the box body is provided with a through hole, the other end of the box body is provided with a heat dissipation hole, and the heating cavity is communicated with the outside through the through hole and the heat dissipation hole; the heat dissipation holes correspond to the rotating shaft in position; and the heating assembly is arranged on the inner wall of the heating cavity. The heat dissipation holes are formed in the position, corresponding to the rotating shaft, of one end of the box body, when the turbine disc assembly is heated by the heating device, heat of the turbine disc assembly is transmitted to the rotating shaft, the rotating shaft can exchange heat with the outside through the heat dissipation holes, and the phenomenon that the rotating shaft and surrounding parts continuously absorb heat to cause overtemperature is avoided; the strength of the rotating shaft and the connecting parts such as the surrounding bearings can be continuously kept in the rotating process of the turbine disc assembly, and then the dynamic characteristics of the turbine disc assembly in the high-temperature environment can be reflected more accurately.

Description

Technical Field

[0001] The invention relates to the technical field of aviation engines, and in particular to a heating device and a dynamic characteristic test system. Background Art

[0002] The power turbine rotor is a key component in an aviation turboshaft engine or turboprop engine. The power turbine rotor is mainly composed of a power turbine shaft and a power turbine disk assembly. The vibration magnitude and critical speed distribution of the power turbine rotor are important parameters for evaluating its dynamic characteristics. Since the power turbine rotor usually works in a high temperature environment of the engine, the deformation of the rotor in a high temperature environment and the change in the connection state between the components will directly affect the vibration magnitude and critical speed distribution of the rotor.

[0003] At present, when the existing power turbine rotor is undergoing a dynamic characteristics test, the heating equipment will heat the power turbine rotor as a whole. Since the structure of the heating equipment is relatively simple, the heating conditions of the power turbine rotor under this heating method are quite different from those during actual operation. When the power turbine rotor is undergoing a dynamic characteristics test in this state, it is difficult to obtain effective data, resulting in poor test effectiveness. Summary of the invention

[0004] In view of this, the present invention provides a heating device and a dynamic characteristic test system to solve the problem that the existing heating method of the power turbine rotor is difficult to meet the test requirements.

[0005] In a first aspect, the present invention provides a heating device for heating a power turbine rotor, wherein the power turbine rotor comprises a rotating shaft and a turbine disk assembly, wherein the turbine disk assembly is sleeved on the rotating shaft, and the heating device comprises: a casing having a heating chamber for accommodating the turbine disk assembly therein, wherein a through hole is provided at one end of the casing along the axial direction of the rotating shaft and a heat dissipation hole is provided at the other end, wherein the heating chamber is connected to the outside through the through hole and the heat dissipation hole respectively, wherein the through hole is used for the rotating shaft to pass through, and the heat dissipation hole corresponds to the position of the rotating shaft; and a heating assembly is arranged on the inner wall of the heating chamber.

[0006] Beneficial effect: A heat dissipation hole is opened at one end of the casing corresponding to the position of the rotating shaft. When the heating device heats the turbine disk assembly, the heat of the turbine disk assembly will be transferred to the rotating shaft. At this time, the rotating shaft can exchange heat with the outside world through the heat dissipation hole, so as to avoid the continuous absorption of heat by itself and surrounding components and the occurrence of overheating, thereby ensuring that the rotating shaft and surrounding connecting parts such as bearings continue to maintain their own strength during the rotation of the turbine disk assembly, thereby being able to more accurately reflect the dynamic characteristics of the turbine disk assembly in a high temperature environment, and effectively solving the problem that the existing heating method of the power turbine rotor is difficult to meet the test requirements.

[0007] In an optional embodiment, a heat-insulating tube is disposed inside the box body, and the heat-insulating tube is disposed around the heat-dissipating hole and is located between the heat-dissipating hole and the rotating shaft.

[0008] Beneficial effects: The insulation tube can separate the space inside the box, and at the same time can reduce the heat loss when the heating component in the heating chamber is heated. The heat transfer passage formed inside the insulation tube allows the outside to exchange heat with the rotating shaft more directly and concentratedly through the heat transfer passage. In addition, due to the existence of the insulation tube, the heat in the space outside the heating chamber of the insulation tube can also act on the turbine disk assembly more concentratedly, thereby ensuring the heating effect of the heating device on the turbine disk assembly.

[0009] In an optional embodiment, the box body includes a main body and a first end cover, the main body and the first end cover together form a heating chamber, the first end cover is detachably connected to the main body, and the first end cover includes a first upper cover and a first lower cover that together form a perforation.

[0010] Beneficial effect: This assembled first end cover can be combined and assembled after the power turbine rotor is assembled and enters the designated heating position, which can avoid the need to pass the rotating shaft through the through hole before it can be assembled with the turbine disk assembly, and can effectively improve the ease of use of the heating device.

[0011] In an optional embodiment, the box body includes a surrounding tube and a second end cover, the first end cover and the second end cover are respectively arranged at two ends of the surrounding tube along the axial direction of the rotating shaft, and the second end cover has heat dissipation holes and a heat insulation tube.

[0012] Beneficial effects: With this type of box, the second end cover can be removed separately to facilitate assembly or inspection of the internal components of the heating chamber. In addition, the manufacturing difficulty of the split box is also lower, and it is easy to process and manufacture.

[0013] In an optional embodiment, the surrounding tube includes an upper tube and a lower tube that are detachably connected, the inner wall of the upper tube and the inner wall of the lower tube are respectively provided with heating components, the second end cover includes a second upper cover and a second lower cover, the second upper cover and the second lower cover together form a heat dissipation hole and a heat-insulating tube, and / or the first end cover, the surrounding tube and the second end cover are all heat-insulating components, and the outer walls of the first end cover, the surrounding tube and the second end cover are all fixedly covered with a supporting layer.

[0014] Beneficial effects: The individual components of this type of enclosure and second end cover are smaller in size, which is not only convenient for production and manufacturing, but also easier for transportation and assembly. When the interior of the heating device needs to be assembled, debugged or maintained, one of the components in a local position can be removed according to the position that needs to be debugged, which can effectively improve the flexibility of assembly and disassembly. In addition, this type of box component has better thermal insulation effect and better structural strength, making the box more reliable and durable during long-term operation.

[0015] In an optional embodiment, the box body also includes a tensioning piece, the surrounding tube has a tensioning hole extending along the axial direction, one of the first end cover and the second end cover is provided with a connecting hole, and the other one is provided with a matching hole, the tensioning piece passes through the connecting hole and the tensioning hole in sequence and is connected to the matching hole, and the first end cover, the surrounding tube and the second end cover are tightened and fixed by the tensioning piece.

[0016] Beneficial effect: The tensioning member can further improve the connection reliability and integrity between the first end cover, the shroud and the second end cover, prevent the first end cover, the shroud and the second end cover from thermally deforming and contacting and rubbing with the power turbine rotor when heated, and improve the reliability and safety of the device during use.

[0017] In an optional embodiment, the heating device also includes a supporting assembly, which includes a supporting frame, a supporting seat and a locking piece. The supporting frame is connected to the box body, the supporting seat has a connecting column extending along the height direction of the box body, the supporting frame has a mating end, and the mating end is used for a strip hole mating with the connecting column. The locking piece is movably arranged on the connecting column and is located below the mating end.

[0018] Beneficial effect: This form of support assembly can adjust the height of the box by adjusting the position of the locking piece on the connecting column, and can also adjust the position of the box in the horizontal plane through the matching position of the strip hole at the matching end and the connecting column, which can effectively improve the flexibility of the position adjustment of the heating device.

[0019] In an optional embodiment, the heating assembly includes a heating tube, an insulating sleeve and a heating wire, the heating wire is located inside the heating tube, and the insulating sleeve is located between the outer wall of the heating wire and the inner wall of the heating tube.

[0020] Beneficial effects: The heating component has a simple and reliable structure and is easy to process and manufacture. The heating tube protects the heating wire. The insulating sleeve can prevent the heating wire from contacting the heating tube and causing a short circuit, thereby improving the safety of the working process.

[0021] In an optional embodiment, the heating device also includes a temperature detection component inserted into the heating chamber, the temperature detection component includes a detection piece and a mounting seat, a detection hole for the detection piece to pass through is provided on the box body, the detection piece is passed through the mounting seat, and is detachably connected to the detection hole through the mounting seat, and the mounting seat has an unlocked state that enables the detection piece to move, and a fixed state that fixes the detection piece.

[0022] Beneficial effects: This type of temperature detection component can more flexibly and quickly adjust the extension length of the detection piece according to the temperature detection requirements.

[0023] In the second aspect, the present invention also provides a dynamic characteristics test system, which includes: the above-mentioned heating device; a power turbine rotor, including a rotating shaft and a turbine disk assembly, the rotating shaft is inserted into the heating chamber of the box of the heating device, and the turbine disk assembly is sleeved on the rotating shaft and located in the heating chamber; a detection assembly, having a support and a detection element arranged on the support, and the power turbine rotor is arranged on the support. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A three-dimensional schematic diagram of an assembled heating device according to an embodiment of the present invention;

[0026] Figure 2 for Figure 1 A cutaway schematic diagram of the heating device and the power turbine rotor after assembly shown;

[0027] Figure 3 for Figure 1 A front view of the heating device shown;

[0028] Figure 4 for Figure 3 A left side view of the heating device is shown;

[0029] Figure 5 for Figure 3 A right side view of the heating device is shown;

[0030] Figure 6 for Figure 3 A rear view of the heating device shown;

[0031] Figure 7 for Figure 3 A top view of the heating device shown;

[0032] Figure 8 for Figure 4 A partially cutaway schematic diagram of the top of the heating device shown;

[0033] Fig. 9 for Figure 4 A cutaway schematic diagram of the heating device shown;

[0034] Fig.10 for Fig. 9 A partial enlarged schematic diagram of the location of the temperature detection component of the heating device shown.

[0035] Description of reference numerals:

[0036] 1. Box body; 101. Heating chamber; 102. Perforation; 103. Heat dissipation hole; 104. Heat insulation tube;

[0037] 105, first end cover; 1051, first upper cover; 1052, first lower cover; 1053, matching hole; 106, surrounding tube; 1061, upper tube; 1062, lower tube; 1063, tie hole; 107, second end cover; 1071, second upper cover; 1072, second lower cover; 1073, connection hole; 1074, detection hole;

[0038] 108, tension piece; 109, connecting piece; 110, fixing hole; 111, buckle; 112, positioning groove; 113, connecting piece; 114, lead hole; 115, handle;

[0039] 2. Heating assembly; 3. Support assembly; 301. Support frame; 3011. Matching end; 302. Support seat; 3021. Connecting column; 303. Locking piece;

[0040] 4. Temperature detection assembly; 401. Detection member; 402. Mounting seat; 4021. First mounting support; 4022. Second mounting support;

[0041] 501, rotating shaft; 502, turbine disk assembly; 601, support; 602, detection element. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0043] Combine the following Figures 1 to 10 , describing an embodiment of the present invention.

[0044] In the related art, when the power turbine rotor is undergoing a dynamic characteristic test, the heating equipment will wrap the entire turbine disk assembly 502 and the rotating shaft 501 connected to the turbine disk assembly 502. The dynamic characteristic data of the power turbine rotor measured under this heating method is obviously quite different from the actual situation. After continuous comparative tests, since the heating equipment will heat the turbine disk assembly 502 and the nearby rotating shaft 501 at the same time, the rotating shaft 501 and the connected bearings and other connecting parts will overheat, resulting in a decrease in the strength of the rotating shaft 501 and the connected bearings and other connecting parts, and then deformation or failure will occur, which will ultimately seriously affect the accuracy of the measured data.

[0045] Among them, overtemperature refers to the temperature of the component itself exceeding the temperature of the component by more than twice.

[0046] According to an embodiment of the present invention, on the one hand, a heating device is provided for heating a power turbine rotor, the power turbine rotor comprising a rotating shaft 501 and a turbine disk assembly 502, the turbine disk assembly 502 being sleeved on the rotating shaft 501, the heating device comprising: a casing 1 and a heating assembly 2, the casing 1 having a heating chamber 101 for accommodating the turbine disk assembly 502, the casing 1 having a through hole 102 at one end along the axial direction of the rotating shaft 501 and a heat dissipation hole 103 at the other end, the heating chamber 101 being connected to the outside through the through hole 102 and the heat dissipation hole 103 respectively, the through hole 102 being used for the rotating shaft 501 to pass through, the heat dissipation hole 103 corresponding to the position of the rotating shaft 501, and the heating assembly 2 being arranged on the inner wall of the heating chamber 101.

[0047] The heating device of this embodiment is used to open a heat dissipation hole 103 at one end of the casing 1 corresponding to the position of the rotating shaft 501. When the heating device heats the turbine disk assembly 502, the heat of the turbine disk assembly 502 will be transferred to the rotating shaft 501. At this time, the rotating shaft 501 can exchange heat with the outside world through the heat dissipation hole 103, so as to avoid the continuous absorption of heat by itself and surrounding components and the occurrence of overheating, thereby ensuring that the rotating shaft 501 and surrounding connecting components such as bearings continue to maintain their own strength during the rotation of the turbine disk assembly 502, thereby being able to more accurately reflect the dynamic characteristics of the turbine disk assembly 502 in a high temperature environment, and effectively solving the problem that the existing heating method of the power turbine rotor is difficult to meet the test requirements.

[0048] It should be noted that since the heating device only heats the power turbine rotor but does not bear any load on it, the power turbine rotor requires additional supports during testing. The turbine disk assembly 502 is driven to rotate by the rotating shaft 501 and is rotatably arranged on the corresponding support through the bearing assembly.

[0049] Specifically, the clearance between the through hole 102 and components such as the power turbine rotor and the support disposed inside the through hole 102 is matched to avoid interference between the through hole 102 and surrounding components during the heating process, and can also reduce heat loss through the through hole 102. In addition, the components outside the through hole 102 can also be protected to prevent them from being damaged due to excessive temperature.

[0050] In one possible embodiment, an insulating tube 104 is provided inside the housing 1. The insulating tube 104 is arranged around the heat dissipation hole 103 and is located between the heat dissipation hole 103 and the rotating shaft 501. The insulating tube 104 can separate the space inside the housing 1 and can also reduce the heat loss when the heating component 2 in the heating chamber 101 is heated. The heat transfer path formed inside the insulating tube 104 allows the outside to exchange heat with the rotating shaft 501 more directly and concentratedly. In addition, due to the existence of the insulating tube 104, the heat in the space outside the heating chamber 101 outside the insulating tube 104 can also act on the turbine disk assembly 502 more concentratedly, thereby ensuring the heating effect of the heating device on the turbine disk assembly 502.

[0051] Specifically, since the rotating shaft 501 needs to drive the turbine disk assembly 502 to rotate, there is a gap between the heat insulation cylinder 104 and the rotating shaft 501, which can avoid interference between components and reliably enable the rotating shaft 501 to exchange heat with the outside world.

[0052] In a possible embodiment, the housing 1 includes a main body and a first end cover 105, which together form a heating chamber 101. The first end cover 105 is detachably connected to the main body. The first end cover 105 includes a first upper cover 1051 and a first lower cover 1052 that together form a through hole 102. This assembled first end cover 105 can be combined and assembled after the power turbine rotor is assembled and enters the designated heating position, which can avoid the need to first pass the rotating shaft 501 through the through hole 102 before it can be assembled with the turbine disk assembly 502, and can effectively improve the ease of use of the heating device. In addition, the number of components that make up the first end cover 105 is relatively small, which can reduce the assembly steps required for assembling the components while ensuring the overall structural strength of the first end cover 105.

[0053] It can be understood that, as an alternative embodiment, the first end cover 105 can also be divided along more than two radial directions to form more than two cover bodies, and multiple fan-shaped cover bodies are combined to form the through hole 102, which can be flexibly selected according to needs.

[0054] It should be noted that the first upper cover 1051 and the first lower cover 1052 are not strictly limited to the first end cover 105 being divided into two parts along the up-down direction, and the first end cover 105 can be divided into two parts along any diameter direction.

[0055] In a possible embodiment, the housing 1 includes a surrounding tube 106 and a second end cover 107. The first end cover 105 and the second end cover 107 are respectively arranged at the two ends of the surrounding tube 106 along the axial direction of the rotating shaft 501. The second end cover 107 has a heat dissipation hole 103 and an insulating tube 104. In this form of housing 1, the second end cover 107 can be removed separately to more conveniently assemble or inspect the internal components of the heating chamber 101. In addition, the manufacturing difficulty of the split housing 1 is also lower, which is convenient for processing and manufacturing.

[0056] Specifically, there is no limitation on the connection method between the second end cover 107 body and the insulation tube 104 , which may be an integrated component, or the insulation tube 104 may be a separately manufactured component connected to the heat dissipation hole 103 of the second end cover 107 through an assembly connection process.

[0057] In a possible embodiment, the surrounding tube 106 includes an upper tube 1061 and a lower tube 1062 which are detachably connected, and the inner walls of the upper tube 1061 and the lower tube 1062 are respectively provided with heating components 2, and the second end cover 107 includes a second upper cover 1071 and a second lower cover 1072, and the second upper cover 1071 and the second lower cover 1072 together form a heat dissipation hole 103 and a heat insulation tube 104. The single components of this form of the surrounding tube 106 and the second end cover 107 are smaller in size, which is not only convenient for production and manufacturing, but also easier for transportation and assembly. In addition, when it is necessary to assemble, debug or maintain the interior of the heating device, one of the components at a local position can be removed according to the position that needs to be debugged, which can effectively improve the flexibility of assembly and disassembly.

[0058] As an alternative embodiment, the circumferential cylinder 106 and the second end cover 107 can also be divided along the radial direction to form more than two parts, which can be flexibly selected according to needs.

[0059] Specifically, the upper cylinder 1061 and the lower cylinder 1062 are not strictly limited to the surrounding cylinder 106 divided into two parts along the up-down direction, and the surrounding cylinder 106 can be divided into two parts along any diameter direction; the second upper cover 1071 and the second lower cover 1072 are not strictly limited to the second end cover 107 divided into two parts along the up-down direction, and the second end cover 107 can be divided into two parts along any diameter direction as long as it is easy to assemble.

[0060] Preferably, the first end cover 105, the circumferential cylinder 106 and the second end cover 107 are respectively separated along the horizontal diameter line to form two components. In this form, the first end cover 105, the circumferential cylinder 106 and the second end cover 107 can respectively form two upper and lower parts that can be assembled independently. The upper and lower parts of the first end cover 105, the circumferential cylinder 106 and the second end cover 107 can be assembled separately first, and then the upper part can be hoisted to the top of the lower part for assembly, which provides more options for the assembly process of the heating device.

[0061] Specifically, the box body 1 further includes a connecting piece 109, and the upper and lower parts of the first end cover 105 and the upper and lower parts of the second end cover 107 are connected by the connecting piece 109 to improve the integrity of the first end cover 105 and the second end cover 107. Figure 3 and Figure 6 As shown, fixing holes 110 are provided at the joint positions of the first upper cover 1051 and the first lower cover 1052 and at the joint positions of the second upper cover 1071 and the second lower cover 1072, and the two ends of the connecting piece 109 are respectively connected to the fixing holes 110 on both sides of the joint position by connecting bolts, thereby tightening and fixing the upper and lower cover bodies.

[0062] In addition, if Figures 3 to 6 As shown, a buckle 111 is provided at the joint position of the outer circumferential surface of the upper tube 1061 and the lower tube 1062. The upper tube 1061 and the lower tube 1062 are detachably connected via the buckle 111. The unlocking and locking process is simple and quick, and the disassembly is convenient.

[0063] Furthermore, if Figures 3 to 6 As shown, a plurality of positioning plates are arranged at intervals on the outer circumferential surfaces of the first end cover 105 and the second end cover 107, and a positioning groove 112 is correspondingly arranged on each positioning plate. Corresponding matching plates are arranged correspondingly on the circumferential tube 106 for each positioning plate, and a positioning groove 112 is also correspondingly arranged on each matching plate. The corresponding positioning grooves 112 are penetrated and fixed by connecting members 113, so that the first end cover 105 and the second end cover 107 are respectively reliably fixedly connected to the circumferential tube 106.

[0064] Among them, Figures 3 to 6 As shown, at least one lead hole 114 is respectively provided on the first end cover 105 and the second end cover 107 to facilitate the lead-out of thermocouple wires and strain wires when the rotor is subjected to temperature calibration measurement; handles 115 are respectively provided on both sides of the upper cylinder 1061 and the lower cylinder 1062 to facilitate the transportation of the upper cylinder 1061 and the lower cylinder 1062.

[0065] In a possible embodiment, the first end cover 105, the surrounding cylinder 106 and the second end cover 107 are all heat-insulating components, and the outer walls of the first end cover 105, the surrounding cylinder 106 and the second end cover 107 are fixedly covered with a supporting layer, which has better thermal insulation effect and better structural strength, making the box body 1 more reliable and durable during long-term operation.

[0066] In a possible implementation, Figure 8 As shown, the casing 1 also includes a tensioning member 108, the circumferential tube 106 has a tie hole 1063 extending along the axial direction, one of the first end cover 105 and the second end cover 107 is provided with a connecting hole 1073, and the other one is provided with a matching hole 1053, the tensioning member 108 passes through the connecting hole 1073 and the tie hole 1063 in sequence and is connected with the matching hole 1053, the first end cover 105, the circumferential tube 106 and the second end cover 107 are tightened and fixed by the tensioning member 108, the tensioning member 108 can further improve the connection reliability and integrity between the first end cover 105, the circumferential tube 106 and the second end cover 107, prevent the first end cover 105, the circumferential tube 106 and the second end cover 107 from thermal deformation and contact and friction with the power turbine rotor when heated, and improve the reliability and safety of the device during use.

[0067] There is no limitation on the number of the tensioning members 108, which can be: Figure 6 As shown, two tension members 108 are respectively provided at the upper and lower parts to respectively tie and fix the upper plate part and the lower half part of the box body 1. Alternatively, one or more tension members 108 may be provided at the upper and lower parts.

[0068] Preferably, the tensioning members 108 are symmetrically arranged along an axis perpendicular to the seam line between the upper and lower parts of the box body 1 .

[0069] In a possible implementation, Figure 1 and Figure 3 As shown, the heating device also includes a support assembly 3, which includes a support frame 301, a support seat 302 and a locking piece 303. The support frame 301 is connected to the box body 1, and the support seat 302 has a connecting column 3021 extending along the height direction of the box body 1. The support frame 301 has a mating end 3011, and the mating end 3011 is used for a strip hole mating with the connecting column 3021. The locking piece 303 is movably arranged on the connecting column 3021 and is located below the mating end 3011. This form of support assembly 3 can adjust the height of the box body 1 by adjusting the position of the locking piece 303 on the connecting column 3021, and can also adjust the position of the box body 1 in the horizontal plane through the mating position of the strip hole of the mating end 3011 and the connecting column 3021, which can effectively improve the flexibility of position adjustment of the heating device.

[0070] Specifically, the mating end 3011 is in abutment with the locking member 303 . The specific form of the locking member 303 is not limited and may be a locking nut, a positioning pin, or the like.

[0071] Preferably, the support frame 301 is welded and fixed to the bottom of the box body 1, and the support frame 301 has four legs, and the end of each leg has a mating end 3011, the connecting column 3021 is a stud, and the locking piece 303 is a locking nut. At least one locking piece 303 is respectively arranged on the upper and lower sides of the mating end 3011. This arrangement of the locking piece 303 can prevent the mating end 3011 from moving downward, and can also prevent the mating end 3011 from moving upward and falling out of the connecting column 3021.

[0072] In a possible embodiment, the heating component 2 includes a heating tube, an insulating sleeve and a heating wire. The heating wire is located inside the heating tube, and the insulating sleeve is located between the outer wall of the heating wire and the inner wall of the heating tube. The heating component 2 has a simple and reliable structure and is easy to process and manufacture. The heating tube protects the heating wire, and the insulating sleeve can prevent the heating wire from contacting the heating tube and causing a short circuit, thereby improving the safety of the working process.

[0073] Specifically, there is no limitation on the arrangement of the heating component 2. It can be installed to the inner wall of the box body 1 through a mounting frame, or by setting a mounting groove on the inner wall of the box body 1 to accommodate the heating component 2, or by directly welding the heating component 2 to the inner wall of the box body 1.

[0074] Preferably, the heating component 2 is assembled and connected to the inner wall of the surrounding cylinder 106 of the box body 1 through a mounting frame, and the inner walls of the upper cylinder 1061 and the lower cylinder 1062 are independently provided with the heating components 2; Fig. 9 As shown, the heating tube is arranged along the reciprocating bends of the inner walls of the upper tube 1061 and the lower tube 1062 .

[0075] Among them, the heating tube is a stainless steel pipe of 0Cr25Ni20, 0Cr18Ni9 and other types; the mounting frame is a stainless steel plate of 0Cr25Ni20, 0Cr18Ni9 and other types.

[0076] In a possible implementation, Fig. 9 As shown, the heating device also includes a temperature detection component 4 that penetrates into the heating chamber 101, and the temperature detection component 4 includes a detection piece 401 and a mounting seat 402. A detection hole 1074 is provided on the box body 1 for the detection piece 401 to pass through. The detection piece 401 is passed through the mounting seat 402 and is detachably connected to the detection hole 1074 through the mounting seat 402. The mounting seat 402 has an unlocked state that enables the detection piece 401 to move, and a fixed state that fixes the detection piece 401. This form of temperature detection component 4 can more flexibly and quickly adjust the extension length of the detection piece 401 according to the temperature detection requirements.

[0077] Specifically, Fig.10 As shown, the mounting base 402 includes a first mounting support 4021 and a second mounting support 4022. The second mounting support 4022 is detachably inserted in the detection hole 1074. The first mounting support 4021 and the second mounting support 4022 both have a through hole for the detection member 401 to pass through. In the unlocked state, the detection member 401 and the through holes of the first mounting support 4021 and the second mounting support 4022 are clearance-fitted to facilitate the smooth movement of the detection member 401.

[0078] Furthermore, the first mounting support 4021 is sleeved on the second mounting support 4022, and the two are connected by a thread. The end of the second mounting support 4022 close to the first mounting support 4021 has a conical outer peripheral surface, and the end is distributed in multiple sections at intervals along the circumferential direction. The first mounting support 4021 has a funnel-shaped inner peripheral surface that matches the conical outer peripheral surface. When the first mounting support 4021 is continuously screwed close to the second mounting support 4022 through the thread, the funnel-shaped inner peripheral surface of the first mounting support 4021 will abut and match with the conical outer peripheral surface of the second mounting support 4022, and the end of the second mounting support 4022 will continue to press the detection component 401, so that the position fixation of the detection component 401 can be achieved.

[0079] According to an embodiment of the present invention, on the other hand, a dynamic characteristics test system is provided, which includes: the above-mentioned heating device, a power turbine rotor and a detection component, the power turbine rotor includes a rotating shaft 501 and a turbine disk assembly 502, the rotating shaft 501 is inserted into the heating chamber 101 of the housing 1 of the heating device, the turbine disk assembly 502 is sleeved on the rotating shaft 501 and is located in the heating chamber 101, the detection component has a support 601 and a detection element 602 arranged on the support 601, and the power turbine rotor is arranged on the support 601.

[0080] Specifically, the detection element 602 includes a displacement sensor and an acceleration sensor. When the rotor is running, the displacement sensor measures the vibration displacement of the rotating shaft 501, and the acceleration sensor measures the vibration acceleration of the support 601 of the turbine disk assembly 502, thereby obtaining dynamic test parameters such as the vibration amplitude of the rotating shaft 501, the external transmission force of the support 601, and the critical speed distribution of the rotor, thereby providing verification data for the analysis of the rotor dynamic characteristics.

[0081] There is no limitation on the specific forms of the rotating shaft 501, the turbine disk assembly 502 and the detection assembly, and they can be designed accordingly according to the actual test situation, so no further details will be given here.

[0082] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A heating device for heating a power turbine rotor, the power turbine rotor comprising a rotating shaft (501) and a turbine disk assembly (502), the turbine disk assembly (502) being sleeved on the rotating shaft (501), characterized in that: The heating device comprises: A casing (1), having a heating chamber (101) therein for accommodating the turbine disk assembly (502); a through hole (102) is provided at one end of the casing (1) along the axial direction of the rotating shaft (501) and a heat dissipation hole (103) is provided at the other end; the heating chamber (101) is connected to the outside through the through hole (102) and the heat dissipation hole (103) respectively; the through hole (102) is used for the rotating shaft (501) to pass through; and the heat dissipation hole (103) corresponds to the position of the rotating shaft (501); A heating component (2) is arranged on the inner wall of the heating chamber (101).

2. The heating device according to claim 1, characterized in that A heat-insulating tube (104) is arranged inside the box body (1), and the heat-insulating tube (104) surrounds the heat-dissipating hole (103) and is located between the heat-dissipating hole (103) and the rotating shaft (501).

3. The heating device according to claim 2, characterized in that: The box body (1) comprises a main body and a first end cover (105), wherein the main body and the first end cover (105) together form the heating chamber (101), the first end cover (105) is detachably connected to the main body, and the first end cover (105) comprises a first upper cover (1051) and a first lower cover (1052) that together form the through hole (102).

4. The heating device according to claim 3, characterized in that: The box body (1) comprises a surrounding tube (106) and a second end cover (107), wherein the first end cover (105) and the second end cover (107) are respectively arranged at two ends of the surrounding tube (106) along the axial direction of the rotating shaft (501), and the second end cover (107) has the heat dissipation hole (103) and the heat insulation tube (104).

5. The heating device according to claim 4, characterized in that: The surrounding cylinder (106) comprises an upper cylinder (1061) and a lower cylinder (1062) which are detachably connected, the inner wall of the upper cylinder (1061) and the inner wall of the lower cylinder (1062) are respectively provided with the heating assembly (2), the second end cover (107) comprises a second upper cover (1071) and a second lower cover (1072), the second upper cover (1071) and the second lower cover (1072) together enclose the heat dissipation hole (103) and the heat insulation cylinder (104), And / or, the first end cover (105), the shroud (106) and the second end cover (107) are all heat-insulating components, and the outer walls of the first end cover (105), the shroud (106) and the second end cover (107) are all fixedly covered with a supporting layer.

6. The heating device according to claim 4, characterized in that: The box body (1) also includes a tensioning member (108), the circumferential tube (106) has a tie hole (1063) extending along the axial direction, one of the first end cover (105) and the second end cover (107) is provided with a connecting hole (1073), and the other one is provided with a matching hole (1053), the tensioning member (108) passes through the connecting hole (1073) and the tie hole (1063) in sequence and is connected to the matching hole (1053), and the first end cover (105), the circumferential tube (106) and the second end cover (107) are tightened and fixed by the tensioning member (108).

7. The heating device according to any one of claims 4 to 6, characterized in that: The heating device also includes a support assembly (3), which includes a support frame (301), a support seat (302) and a locking piece (303); the support frame (301) is connected to the box body (1); the support seat (302) has a connecting column (3021) extending along the height direction of the box body (1); the support frame (301) has a mating end (3011); the mating end (3011) is a strip hole for mating with the connecting column (3021); the locking piece (303) is movably arranged on the connecting column (3021) and is located below the mating end (3011).

8. The heating device according to any one of claims 1 to 6, characterized in that: The heating assembly (2) comprises a heating tube, an insulating sleeve and a heating wire, wherein the heating wire is located inside the heating tube, and the insulating sleeve is located between the outer wall of the heating wire and the inner wall of the heating tube.

9. The heating device according to any one of claims 1 to 6, characterized in that: The heating device further comprises a temperature detection component (4) inserted into the heating chamber (101), the temperature detection component (4) comprising a detection member (401) and a mounting seat (402), the housing (1) being provided with a detection hole (1074) for the detection member (401) to pass through, the detection member (401) being passed through the mounting seat (402) and being detachably connected to the detection hole (1074) via the mounting seat (402), the mounting seat (402) having an unlocking state for enabling the detection member (401) to move, and a fixing state for fixing the detection member (401).

10. A dynamic characteristics test system, characterized in that: include: The heating device according to any one of claims 1 to 9; A power turbine rotor, comprising a rotating shaft (501) and a turbine disk assembly (502), wherein the rotating shaft (501) is inserted into a heating chamber (101) of a housing (1) of the heating device, and the turbine disk assembly (502) is sleeved on the rotating shaft (501) and located in the heating chamber (101); The detection component comprises a support (601) and a detection element (602) arranged on the support (601), and the power turbine rotor is arranged on the support (601).

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