Universal combustion chamber high-altitude test bench without environment simulation cabin

Abstract

The invention belongs to the technical field of aero-engine experimental equipment, and discloses a universal combustion chamber high-altitude test bed without an environment simulation cabin, which comprises an air inlet component and an air outlet component. The device is suitable for test loading and unloading work of single-head, multi-head and full-ring combustion chamber switching sections with various lengths, is suitable for an aero-engine combustion chamber high-altitude ignition and flameout test bench, and is especially suitable for a single-head and multi-head combustion chamber high-altitude ignition test bench. The cold insulation requirement of the switching section under the low-temperature working conditions of-54 DEG C and the like is met through the detachable heat insulation structure, so that the same environment simulation effect as that of a high-altitude tester with an environment simulation cabin is achieved. The problems that an environment simulation cabin is high in construction cost, large in structural size, complex in test piece loading and unloading work, high in operation and maintenance cost and the like are solved; and meanwhile, the defects that the temperature drop of the switching section is large, the switching section is not suitable for switching sections with various lengths, inlet and outlet flanges connected with the switching section are not universal and the like when the combustion chamber test piece is subjected to a high-altitude ignition test without an environment simulation cabin are overcome.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation engine experimental equipment, and in particular relates to a universal combustion chamber high-altitude test bench without an environmental simulation cabin. Background Art

[0002] The ignition boundary range of aviation engines is a key technical indicator of engine working ability and advancement. In order to improve the forward development capability of aviation engines and speed up the research and development speed, it is necessary to carry out high-altitude flameout tests on single-head combustion chamber test pieces, multi-head combustion chamber test pieces, and full-ring combustion chamber test pieces.

[0003] The high altitude flameout test of single-head, multi-head and even (small) full-ring combustion chamber test pieces needs to simulate the low temperature and low pressure inlet environment. In order to reduce various interference factors, the transition section is generally placed in an environmental simulation cabin.

[0004] Existing aircraft engine complete machines, combustion chamber high-altitude ignition testers, etc., are all tested in environmental simulation cabins when conducting high-altitude tests. During the test, in addition to providing low-temperature and low-pressure compressed air to the test piece, it is also necessary to supply low-pressure compressed air at body temperature to the environmental simulation cabin. The size of the environmental simulation cabin is much larger than the size of the test piece, so the tester needs to be equipped with a higher-power compressed air source and exhaust air source, resulting in higher construction and operating costs for the tester. At the same time, the environmental simulation cabin brings greater challenges to the layout, installation, and connection of the test wiring of the transition section. In addition, the existence of the environmental simulation cabin increases the difficulty of installing the upper and lower platforms of the transition section.

[0005] In order to reduce construction and operation and maintenance costs, the prior art proposes a high-altitude ignition tester without an environmental simulation cabin, but the current tester has the following problems:

[0006] 1. It cannot meet the installation requirements of combustion chamber transition sections of various lengths.

[0007] 2. The inlet and outlet flanges cannot be used interchangeably with existing conventional transition sections, and each test piece requires a separate processing transition section.

[0008] 3. Due to the inconsistent test section structure, the test results are inconsistent with those of other test benches, affecting the validity and reliability of the test results.

[0009] 4. Due to the large inlet and outlet flanges, the time required to get on and off the test bench is 4 to 6 times that of other test benches.

[0010] 5. The area from the inlet flange of the test bench to the front of the combustion chamber nozzle is not insulated, resulting in a large temperature drop (at low temperatures, the temperature drop can reach 10°C for every 20 cm), affecting the validity of the test results. Summary of the invention

[0011] In view of the above problems, the present invention provides a universal combustion chamber high-altitude test bench without an environmental simulation cabin, which adopts the following technical solutions:

[0012] A universal combustion chamber high altitude test bench without an environmental simulation cabin, comprising:

[0013] An air intake component, comprising an air intake pipe assembly and a detachable heat-insulating structure, wherein the detachable heat-insulating structure is coated on the outside of the air intake pipe assembly, and a heat-insulating material is filled between the detachable heat-insulating structure and the air intake pipe assembly;

[0014] The gas outlet component includes an outlet measuring section, a telescopic pipeline and an exhaust pipe. The outlet end of the outlet measuring section is detachably connected to one end of the telescopic pipeline, and the other end of the telescopic pipeline is slidably connected to the inner wall of the exhaust pipe. The outlet measuring section, the telescopic pipeline and the exhaust pipe have gas passages that are interconnected.

[0015] Furthermore, the air intake component further includes a first movable bracket and a second movable bracket;

[0016] Among them, the top of the first movable bracket passes through the detachable insulation structure and is supported at a position of the intake pipe assembly close to the inlet end, and the top of the second movable bracket passes through the detachable insulation structure and is supported at a position of the intake pipe assembly close to the outlet end.

[0017] Furthermore, the gas outlet component further comprises a third movable bracket, the top of which is supported on one end of the telescopic pipeline close to the outlet measuring section.

[0018] Furthermore, the air intake pipe assembly comprises a metal hose, a transition section and an inlet transfer section which are connected in sequence;

[0019] Among them, one end of the metal hose is detachably connected to the air intake pipe interface, the other end of the metal hose is detachably connected to one end of the transition section, the other end of the transition section is detachably connected to one end of the inlet transition section, and the other end of the inlet transition section is detachably connected to the air inlet of the test piece.

[0020] Furthermore, the detachable thermal insulation structure comprises a plurality of thermal insulation tubes connected in sequence; each thermal insulation tube is filled with thermal insulation material, two adjacent thermal insulation tubes are detachably connected, and the connection between the two adjacent thermal insulation tubes is filled with thermal insulation material.

[0021] Further, the detachable heat-insulating structure comprises a first heat-insulating tube, a second heat-insulating tube, a third heat-insulating tube, a fourth heat-insulating tube, a fifth heat-insulating tube and a sixth heat-insulating tube connected in sequence;

[0022] Among them, the first insulation tube is sleeved on the outside of the metal hose, the second insulation tube is sleeved on the outside of the transition section, the third insulation tube, the fourth insulation tube and the fifth insulation tube are sleeved on the outside of the inlet transition section, and the sixth insulation tube is sleeved on the outside of the connection between the inlet transition section and the air inlet of the test piece.

[0023] Furthermore, the air intake pipe assembly further comprises a first adjustment bracket and a second adjustment bracket arranged inside the detachable heat-insulating structure;

[0024] Among them, the bottom of the first adjustment bracket is fixedly connected to one end of the inlet transition section close to the metal hose, and the top of the first adjustment bracket is fixedly connected to the inner wall of the third insulation cylinder; the bottom of the second adjustment bracket is fixedly connected to one end of the inlet transition section close to the air inlet of the test piece, and the top of the second adjustment bracket is fixedly connected to the inner wall of the sixth insulation cylinder.

[0025] Furthermore, the first heat-insulating cylinder is cylindrical, and comprises a first semi-cylinder and a second semi-cylinder, one side of the first semi-cylinder and one side of the second semi-cylinder are hingedly connected by a plurality of hinges, and the other side of the first semi-cylinder and the other side of the second semi-cylinder are detachably connected by a first lock;

[0026] The first semi-cylinder and the second semi-cylinder are both provided with semicircular grooves along the axial direction, and the semicircular grooves on the first semi-cylinder and the semicircular grooves on the second semi-cylinder form a cylindrical first cavity, the metal hose is located in the first cavity, and the space between the metal hose and the first cavity is filled with thermal insulation material; the first semi-cylinder and the second semi-cylinder are both provided with a first accommodating cavity inside, and the first accommodating cavity is filled with thermal insulation material.

[0027] Furthermore, the first insulation cylinder also includes a mounting plate, which is arranged at one end of the first insulation cylinder close to the air intake pipe interface, and the mounting plate includes an arc-shaped fixing portion and two connecting portions, the arc-shaped fixing portion is detachably connected to the flange on the metal hose, the bottoms of the two connecting portions are fixedly connected to the arc-shaped fixing portion, and the tops of the two connecting portions are detachably connected to the first semi-cylinder and the second semi-cylinder, respectively.

[0028] Further, the second heat-insulating cylinder is conical, comprising a first semi-conical cylinder and a second semi-conical cylinder, one side of the first semi-conical cylinder and one side of the second semi-conical cylinder are hingedly connected by a plurality of hinges, and the other side of the first semi-conical cylinder and the other side of the second semi-conical cylinder are detachably connected by a second lock;

[0029] The first semi-conical cylinder and the second semi-conical cylinder are both provided with semi-conical grooves along the axial direction, the semi-conical grooves on the first semi-conical cylinder and the semi-conical grooves on the second semi-conical cylinder form a conical second cavity, the transition section is located in the second cavity, and the transition section and the second cavity are filled with thermal insulation material; the first semi-conical cylinder and the second semi-conical cylinder are both provided with second accommodating cavities inside, and the second accommodating cavities are filled with thermal insulation material.

[0030] Further, the third heat-insulating tube, the fourth heat-insulating tube, the fifth heat-insulating tube and the sixth heat-insulating tube are all square, and each includes a first C-shaped tube and a second C-shaped tube, one side of the first C-shaped tube and one side of the second C-shaped tube are hinged by a plurality of hinges, and the other side of the first C-shaped tube and the other side of the second C-shaped tube are detachably connected by a third lock;

[0031] The rectangular groove on the first U-shaped tube and the rectangular groove on the second U-shaped tube form a conical third cavity, and the first U-shaped tube and the second U-shaped tube are both provided with a third accommodating cavity inside, and the third accommodating cavity is filled with a heat-insulating material;

[0032] The inlet transition section is located in the third cavity of the third insulation tube, the fourth insulation tube and the fifth insulation tube, and the third cavity of the inlet transition section and the third insulation tube, the fourth insulation tube and the fifth insulation tube is filled with insulation material; the connection between the inlet transition section and the air inlet of the test piece is located in the third cavity of the sixth insulation tube, and the connection between the inlet transition section and the air inlet of the test piece and the third cavity of the sixth insulation tube is filled with insulation material.

[0033] Furthermore, the first adjustment bracket and the second adjustment bracket structure each include two height adjustment brackets and an adjustment rod;

[0034] Wherein, the two height adjustment frames are both arranged vertically, there is a gap between the two height adjustment frames, the adjustment rod is arranged in the gap, and the two ends of the adjustment rod are respectively fixedly connected to the two height adjustment frames;

[0035] The bottom of the two height adjustment frames of the first adjustment bracket is fixedly connected to one end of the inlet transition section close to the metal hose, and the top of the first adjustment bracket is fixedly connected to the inner wall of the third insulation cylinder; the bottom of the two height adjustment frames of the second adjustment bracket is fixedly connected to one end of the inlet transition section close to the air inlet of the test piece, and the top of the two height adjustment frames of the second adjustment bracket is fixedly connected to the inner wall of the fifth insulation cylinder.

[0036] Further, the telescopic pipeline comprises an inner sleeve, an outer sleeve, a loose flange and a compression flange;

[0037] Wherein, the outer sleeve is sleeved on the outer side of the inner sleeve, the loose flange is arranged at one end of the inner sleeve close to the outlet measuring section, and the loose flange is detachably connected to the flange of the outlet measuring section close to one end of the inner sleeve;

[0038] A first fluid channel is axially arranged inside the tube wall of the inner sleeve, the inner wall surface of the outer sleeve and the outer wall surface of the inner sleeve form a second fluid channel, both ends of the second fluid channel are closed, the inner sleeve is provided with a plurality of connecting holes between the first fluid channel and the second fluid channel, the outer sleeve is provided with a cooling water outlet at one end close to the loose flange, and the inner sleeve is provided with a cooling water inlet at one end close to the loose flange; the cooling water inlet, the first fluid channel, the plurality of connecting holes, the second fluid channel and the cooling water outlet are connected in sequence, and the end of the outer sleeve away from the loose flange is slidably connected with the exhaust pipe through a sliding structure;

[0039] The clamping flange is sleeved on the outer wall of the outer sleeve and is located between the cooling water inlet and the sliding structure. The clamping flange can slide on the outer sleeve.

[0040] Furthermore, an exhaust flange is provided on the exhaust pipe, the exhaust flange is sleeved on one end of the exhaust pipe close to the clamping flange, the exhaust flange matches the clamping flange, and a sealing gasket is provided between the exhaust flange and the clamping flange.

[0041] Furthermore, the test bench also includes a pressure stabilizing cylinder, and a circular cylinder fixing plate is sleeved on the exhaust pipe near the exhaust flange, and one end of the pressure stabilizing cylinder is sleeved on the outside of the exhaust pipe and is detachably connected to the cylinder fixing plate.

[0042] Beneficial effects of the present invention:

[0043] 1. It can effectively reduce the difficulty of installing the transfer section on and off the platform and improve the test efficiency. After the transfer section (including the inlet transfer section, test piece and outlet measurement section) completes the test wiring, fuel and water connections, and the electric nozzle connection, the detachable insulation structure can be installed according to the length and structural characteristics of the transfer section, so the installation speed is fast. Since there is no environmental simulation cabin, the difficulty of the work on the platform has been greatly reduced.

[0044] 2. It can effectively reduce the construction cost and operation and maintenance cost of the tester. The present invention uses the above-mentioned simple processed parts with low cost to replace the environmental simulation cabin with complex structure and high cost; at the same time, since the environmental simulation cabin is cancelled, there is no need to provide cooling and low-pressure compressed air for the environmental simulation cabin, thereby greatly reducing the power of the compressed air station and the power of the suction air source. Therefore, the present invention effectively reduces the construction cost of the tester, and reduces the equipment size and floor space; at the same time, since the environmental simulation cabin is cancelled, the energy consumption required for the test is greatly reduced, thereby reducing the operation and maintenance cost of the equipment.

[0045] 3. It can be applied to the installation needs of single-head, multi-head, and full-ring combustion chamber transition sections of different lengths. Since there are certain axial and circumferential deviations in the processing and installation of the transition section itself, the present invention uses a metal hose to adjust the above deviations in the interface section to ensure that the axis of the transition section outlet is on the same axis as the telescopic pipeline; through the stretching and contraction of the telescopic pipeline, it can meet the installation needs of combustion chamber transition sections of various lengths.

[0046] 4. It can meet the need for cooling the test piece in the low temperature state during the high-altitude flameout test. The detachable insulation structure can meet the insulation requirements of the section from the metal hose (the test bench pipeline before the metal hose has been covered with an insulation layer) to the ignition nozzle of the test piece (combustion chamber). Ensure that the temperature of the test piece before ignition is consistent with the measured temperature, and ensure the validity and reliability of the test results.

[0047] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0049] Figure 1 A schematic structural diagram of a universal combustion chamber high altitude test bench without an environmental simulation cabin according to an embodiment of the present invention is shown;

[0050] Figure 2 It shows an axonometric view of a universal combustion chamber high altitude test bench without an environmental simulation cabin according to an embodiment of the present invention;

[0051] Figure 3A cross-sectional view showing the installation effect of a universal combustion chamber high-altitude test bench without an environmental simulation cabin according to an embodiment of the present invention;

[0052] Figure 4 A schematic diagram showing the installation of a detachable heat-insulating structure and an inlet transition section according to an embodiment of the present invention is shown;

[0053] Figure 5 A schematic diagram of a detachable heat-insulating structure for installing an arched multi-head inlet transition section according to an embodiment of the present invention is shown;

[0054] Figure 6 A schematic diagram showing the installation of an air intake pipe assembly and a detachable heat preservation structure according to an embodiment of the present invention is shown;

[0055] Figure 7 A schematic diagram showing the installation of a telescopic pipe and an exhaust pipe according to an embodiment of the present invention is shown;

[0056] Figure 8 A schematic diagram of installing a first heat-insulating cylinder and a mounting plate according to an embodiment of the present invention is shown;

[0057] Fig. 9 A schematic structural diagram of a first heat preservation cylinder according to an embodiment of the present invention is shown;

[0058] Fig.10 A schematic diagram of the installation of the first semi-cylinder and the second semi-cylinder according to an embodiment of the present invention is shown;

[0059] Fig.11 It shows a schematic structural diagram of a first semi-cylinder according to an embodiment of the present invention;

[0060] Fig.12 A schematic structural diagram of a second heat preservation cylinder according to an embodiment of the present invention is shown;

[0061] Fig.13 A schematic diagram of installing a first C-shaped tube and a second C-shaped tube according to an embodiment of the present invention is shown;

[0062] Fig.14 A schematic diagram of installing a third lock buckle according to an embodiment of the present invention is shown;

[0063] Fig.15 A schematic structural diagram of a first U-shaped cylinder according to an embodiment of the present invention is shown;

[0064] Fig.16 A schematic diagram of the installation of a height adjustment frame and an adjustment rod according to an embodiment of the present invention is shown;

[0065] Fig.17 A schematic diagram showing the structure of a height adjustment frame and an adjustment rod according to an embodiment of the present invention is shown;

[0066] Fig.18 A schematic diagram showing the internal structure of the telescopic pipeline and the exhaust pipe according to an embodiment of the present invention is shown;

[0067] Fig.19 A schematic diagram of installing an outer sleeve and an exhaust pipe according to an embodiment of the present invention is shown;

[0068] Fig. 20 A schematic diagram of the installation of the sliding groove and the outer sleeve according to an embodiment of the present invention is shown;

[0069] Fig.21 A schematic structural diagram of an exhaust flange according to an embodiment of the present invention is shown.

[0070] In the figure: 1, intake pipe assembly; 2, detachable insulation structure; 3, first movable bracket; 4, second movable bracket; 5, outlet measurement section; 6, telescopic pipeline; 7, exhaust pipe; 8, third movable bracket; 9, metal hose; 10, transition section; 11, inlet transfer section; 12, first insulation cylinder; 13, second insulation cylinder; 14, third insulation cylinder; 15, fourth insulation cylinder; 16, fifth insulation cylinder; 17, sixth insulation cylinder; 18, first adjustment bracket; 19, second adjustment bracket; 20, first semi-cylinder; 21, second semi-cylinder; 22, hinge Chain; 23, first lock buckle; 24, first handle; 25, semicircular groove; 26, first cavity; 27, first accommodating cavity; 28, first semicircular plate; 29, second semicircular plate; 30, mounting plate; 31, arc-shaped fixing portion; 32, connecting portion; 33, first semi-conical cylinder; 34, second semi-conical cylinder; 35, semi-conical groove; 36, second handle; 37, mounting circular hole; 38, first U-shaped cylinder; 39, second U-shaped cylinder; 40, third lock buckle; 41, third handle; 42, rectangular groove; 43, third cavity; 44, third accommodating cavity; 45. First U-shaped plate; 46. Second U-shaped plate; 47. Height adjustment frame; 48. Adjustment rod; 49. Support frame; 50. Support leg; 51. Adjustable support foot; 52. Bottom plate; 53. Support plate; 54. Pin; 55. First adjustment rod; 56. Second adjustment rod; 57. First slide; 58. Second slide; 59. Sliding pin; 60. First support platform; 61. First telescopic rod; 62. First connecting plate; 63. Support rod; 64. Second support platform; 65. Second telescopic rod; 66. Second connecting plate; 67. First support plate; 68. Three support platforms; 69, third telescopic rod; 70, second support plate; 71, third connecting plate; 72, inner sleeve; 73, outer sleeve; 74, loose flange; 75, clamping flange; 76, first fluid channel; 77, second fluid channel; 78, connecting hole; 79, cooling water outlet; 80, cooling water inlet; 81, sliding groove; 82, guide rail; 83, exhaust flange; 84, sealing gasket; 85, annular cavity; 86, boss; 87, notch; 88, cover plate; 89, pressure stabilizing cylinder; 90, cylinder fixing plate; 91, support rod; 92, test piece. DETAILED DESCRIPTION

[0071] 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0072] It should be noted that the terms "first", "second" etc. in the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged in appropriate circumstances, so that the embodiments of the present application described here. In the present application, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" etc. are based on the orientation or positional relationship shown in the accompanying drawings.

[0073] The present invention provides a universal combustion chamber high-altitude test bench without an environmental simulation cabin, which is suitable for an aircraft engine combustion chamber high-altitude flameout test bench, and is particularly suitable for the test on- and off-bench work of single-head, multi-head, and full-ring combustion chamber transition sections of various lengths, while meeting the cold preservation requirements of the transition section under low-temperature conditions such as -54°C, thereby achieving the same environmental simulation effect as a high-altitude tester with an environmental simulation cabin.

[0074] It should be noted that the transition stage includes the inlet transition section 11 , the test piece 92 and the outlet measurement section 5 .

[0075] like Figure 1 and Figure 2 As shown, a universal combustion chamber high-altitude test bench without an environmental simulation cabin includes an air intake component and an air outlet component, wherein the air intake component includes an air intake pipe assembly 1, a detachable thermal insulation structure 2, a first movable bracket 3 and a second movable bracket 4, the detachable thermal insulation structure 2 is coated on the outside of the air intake pipe assembly 1, the interior of the detachable thermal insulation structure 2 is filled with thermal insulation material, and the space between the detachable thermal insulation structure 2 and the air intake pipe assembly 1 is also filled with thermal insulation material.

[0076] By arranging a detachable heat-insulating structure 2 on the outside of the air intake pipe assembly 1 , convection heat exchange between the ambient air and the air intake pipe assembly 1 is prevented.

[0077] The inlet end of the air intake pipe assembly 1 is communicated with the air intake pipeline interface, and the outlet end of the air intake pipe assembly 1 is communicated with the air intake port of the test piece 92 .

[0078] The detachable insulation structure meets the insulation needs of single-head, multi-head, and full-ring combustion chamber transition sections of different sizes and specifications through insulation shells of different lengths and shapes.

[0079] like Figure 1 and Figure 3 As shown, the top of the first movable bracket 3 passes through the detachable insulation structure 2 and is supported at a position near the inlet end of the air intake pipe assembly 1, and the top of the second movable bracket 4 passes through the detachable insulation structure 2 and is supported at a position near the outlet end of the air intake pipe assembly 1.

[0080] The first movable bracket 3 and the second movable bracket 4 assist in adjusting the direction of the inlet cross section of the test piece 92 (for example, the combustion chamber).

[0081] like Figure 3 As shown, the gas outlet component includes an outlet measuring section 5, a telescopic pipeline 6, an exhaust pipe 7 and a third movable bracket 8, wherein the inlet end of the outlet measuring section 5 is detachably connected to the gas outlet of the test piece 92, the outlet end of the outlet measuring section 5 is detachably connected to one end of the telescopic pipeline 6 through a flange, the other end of the telescopic pipeline 6 is slidably connected to the inner wall of the exhaust pipe 7, and the outlet measuring section 5, the telescopic pipeline 6 and the exhaust pipe 7 have gas passages that are interconnected.

[0082] The outlet measurement section 5 serves as a transfer tube between the air outlet of the test piece 92 and the telescopic pipe 6 , and can adapt to the installation space requirements of test pieces 92 of different lengths by stretching and contracting the length of the telescopic pipe 6 in the exhaust section.

[0083] The top of the third movable bracket 8 is supported at one end of the telescopic pipeline 6 close to the outlet measuring section 5, playing a supporting role. The third movable bracket 8 pneumatically assists the movement of the telescopic pipeline 6 to assist the extension and contraction of the telescopic pipeline 6. Because the inlet section of the test bench has the ability to adjust the axial and axial deviations, the coaxiality of the outlet measuring section 5 and the telescopic pipeline 6 is relatively high (less than 2mm), which will help the sealing of the telescopic pipeline 6 and the exhaust section.

[0084] like Figure 1 and Figure 3 As shown, for example, the air intake pipe assembly 1 includes a metal hose 9, a transition section 10 and an inlet transition section 11 which are connected in sequence, one end of the metal hose 9 is detachably connected to the air intake pipe interface via a flange, the other end of the metal hose 9 is detachably connected to one end of the transition section 10 via a flange, the other end of the transition section 10 is detachably connected to one end of the inlet transition section 11 via a flange, and the other end of the inlet transition section 11 is detachably connected to the air inlet of the test piece 92 via a flange.

[0085] The inlet end of the air intake pipe assembly 1 is communicated with the air intake pipeline interface through a metal hose 9 , and the metal hose 9 is used to adjust the axial and axial deviations of the air intake pipe assembly 1 during installation.

[0086] It should be noted that if Figure 4 As shown, if the interface of the inlet transition section 11 is consistent with the interface of the metal hose 9, the transition section 10 can be omitted.

[0087] like Figure 4 As shown, for example, the inlet transition section 11 includes a tapered section and a straight pipe section, wherein one end of the tapered section is detachably connected to the transition section 10 via a flange, the other end of the tapered section is connected to one end of the straight pipe section, and the other end of the straight pipe section is detachably connected to the air inlet of the test piece 92 via a flange.

[0088] like Figure 1 As shown, the cross-sectional area of ​​the gas passage of the transition section 10 gradually increases along the air intake direction, and the cross-sectional area of ​​the gas passage of the inlet transition section 11 gradually decreases along the air intake direction.

[0089] For example, the detachable heat-insulating structure 2 includes a plurality of heat-insulating cylinders connected in sequence, each of which is filled with heat-insulating materials. Since the temperature resistance of some heat-insulating materials, such as rubber and plastic materials, does not exceed 110°C, two adjacent heat-insulating cylinders are detachably connected by bolt connection and fastening to avoid the denaturation of the heat-insulating materials caused by welding. The connection between two adjacent heat-insulating cylinders is filled with heat-insulating materials (optionally with adhesive backing) to prevent convection heat exchange between ambient air and the air in the cavity.

[0090] like Figure 2 and Figure 3 As shown, for example, the detachable thermal insulation structure 2 includes 6 thermal insulation tubes, including a first thermal insulation tube 12, a second thermal insulation tube 13, a third thermal insulation tube 14, a fourth thermal insulation tube 15, a fifth thermal insulation tube 16 and a sixth thermal insulation tube 17 connected in sequence.

[0091] like Figure 3 and Figure 6 As shown, the first insulation tube 12 is sleeved on the outside of the metal hose 9, and the length of the first insulation tube 12 is smaller than the length of the metal hose 9, leaving space for bolt installation, which allows the metal hose 9 to have a certain margin when the position changes.

[0092] The second heat-insulating tube 13 is sleeved on the outside of the transition section 10 . The length of the second heat-insulating tube 13 is smaller than that of the transition section 10 , and a space is reserved for installing flanges of the transition section 10 and the inlet transfer section 11 .

[0093] The third heat-insulating tube 14 , the fourth heat-insulating tube 15 and the fifth heat-insulating tube 16 are sleeved on the outside of the inlet transition section 11 , and the sixth heat-insulating tube 17 is sleeved on the outside of the connection between the inlet transition section 11 and the air inlet of the test piece 92 .

[0094] For example, the third heat-insulating tube 14 is sleeved on the outside of the tapered section of the inlet transition section 11 , and the fourth heat-insulating tube 15 and the fifth heat-insulating tube 16 are sleeved on the outside of the straight tube section of the inlet transition section 11 .

[0095] like Figure 3 and Figure 6 As shown, for example, the air intake pipe assembly 1 also includes a first adjustment bracket 18 and a second adjustment bracket 19 arranged inside the detachable thermal insulation structure 2, the bottom of the first adjustment bracket 18 is fixedly connected to one end of the inlet transition section 11 close to the metal hose 9, and the top of the first adjustment bracket 18 is fixedly connected to the inner wall of the third thermal insulation tube 14.

[0096] The bottom of the second adjustment bracket 19 is fixedly connected to one end of the inlet transition section 11 close to the air inlet of the test piece 92 , and the top of the second adjustment bracket 19 is fixedly connected to the inner wall of the sixth heat preservation tube 17 .

[0097] By adjusting the support heights of the first adjustment bracket 18 and the second adjustment bracket 19 , interference between the detachable thermal insulation structure 2 and the sensor connector on the inlet adapter section 11 can be avoided, and the connecting wire of the sensor can be led out through the gap between the detachable thermal insulation structures 2 .

[0098] like Figure 8 and Fig. 9 As shown, for example, the first heat-insulating cylinder 12 is cylindrical, and includes a first semi-cylinder 20 and a second semi-cylinder 21. One side of the first semi-cylinder 20 and one side of the second semi-cylinder 21 are hingedly connected by a plurality of hinges 22, and the other side of the first semi-cylinder 20 and the other side of the second semi-cylinder 21 are detachably connected by a first lock 23. The first heat-insulating cylinder 12 is also provided with a first handle 24, and the first handle 24 is fixedly provided on the outer side wall of the first semi-cylinder 20 or the second semi-cylinder 21.

[0099] The first semi-cylinder 20 and the second semi-cylinder 21 are both provided with semicircular grooves 25 along the axial direction. The semicircular grooves 25 on the first semi-cylinder 20 and the semicircular grooves 25 on the second semi-cylinder 21 form a cylindrical first cavity 26. The metal hose 9 is located in the first cavity 26. The space between the metal hose 9 and the first cavity 26 is filled with thermal insulation material.

[0100] like Fig.10 and Fig.11 As shown, the first semi-cylinder 20 and the second semi-cylinder 21 are each provided with a first accommodating cavity 27, the first accommodating cavity 27 is filled with a heat-insulating material, the first semi-cylinder 20 and the second semi-cylinder 21 are each provided with a first semi-circular plate 28 at one end close to the air intake pipe interface, and the first semi-cylinder 20 and the second semi-cylinder 21 are each provided with a second semi-circular plate 29 at one end close to the transition section 10.

[0101] The first semicircular plate 28 is provided with a plurality of first through holes, and the second semicircular plate 29 is provided with a plurality of second through holes. The first semicircular plate 28 on the first semi-cylinder 20 and the first semicircular plate 28 on the second semi-cylinder 21 form a first flange portion, and the second semicircular plate 29 on the first semi-cylinder 20 and the second semicircular plate 29 on the second semi-cylinder 21 form a second flange portion.

[0102] The first flange is sealed and connected to the sealing plate by bolts passing through the first through hole on the first flange, and is detachably connected to the second heat-insulating cylinder 13 by bolts passing through the second through hole on the second flange.

[0103] like Figure 8 and Fig. 9As shown, the first insulation cylinder 12 also includes a mounting plate 30, which is arranged at one end of the first insulation cylinder 12 close to the air intake pipe interface, and the mounting plate 30 includes an arc-shaped fixing portion 31 and two connecting portions 32. The center line of the arc-shaped fixing portion 31 is colinear with the center line of the first insulation cylinder 12, and the arc-shaped fixing portion 31 is detachably connected to the flange on the metal hose 9. The bottoms of the two connecting portions 32 are fixedly connected to the arc-shaped fixing portion 31, and the tops of the two connecting portions 32 are detachably connected to the first semi-cylinder 20 and the second semi-cylinder 21, respectively.

[0104] The mounting plate 30 is provided to prevent the first heat-insulating cylinder 12 from falling after installation. The mounting plate 30 is connected to the flange on the metal hose 9 and then connected to the first semi-cylinder 20 and the second semi-cylinder 21 by bolts.

[0105] like Fig.12 As shown, for example, the second heat-insulating cylinder 13 is conical, including a first semi-conical cylinder 33 and a second semi-conical cylinder 34, one side of the first semi-conical cylinder 33 and one side of the second semi-conical cylinder 34 are hinged by a plurality of hinges 22, and the other side of the first semi-conical cylinder 33 and the other side of the second semi-conical cylinder 34 are detachably connected by a second lock. A second handle 36 is also provided on the second heat-insulating cylinder 13, and the second handle 36 is fixedly provided on the outer side wall of the first semi-conical cylinder 33 or the second semi-conical cylinder 34.

[0106] The first semi-conical cylinder 33 and the second semi-conical cylinder 34 are both provided with a semi-conical groove 35 along the axial direction. The semi-conical groove 35 on the first semi-conical cylinder 33 and the semi-conical groove 35 on the second semi-conical cylinder 34 form a conical second cavity. The transition section 10 is located in the second cavity. The space between the transition section 10 and the second cavity is filled with thermal insulation material.

[0107] The first semi-conical cylinder 33 and the second semi-conical cylinder 34 are each provided with a second accommodating cavity inside, and the second accommodating cavity is filled with a heat-insulating material. The first semi-conical cylinder 33 and the second semi-conical cylinder 34 are each provided with a third semi-circular plate at one end close to the metal hose 9, and the first semi-conical cylinder 33 and the second semi-conical cylinder 34 are each provided with a fourth semi-circular plate at one end close to the inlet transition section 11.

[0108] The third semicircular plate is provided with a plurality of third through holes, the fourth semicircular plate is provided with a plurality of fourth through holes, the third semicircular plate on the first semi-conical cylinder 33 and the third semicircular plate on the second semi-conical cylinder 34 form a third flange portion, and the fourth semicircular plate on the first semi-conical cylinder 33 and the fourth semicircular plate on the second semi-conical cylinder 34 form a fourth flange portion.

[0109] The third flange is connected to the second flange of the first heat-insulating tube 12 by bolts passing through the third through hole on the third flange, and is detachably connected to the third heat-insulating tube 14 by bolts passing through the fourth through hole on the fourth flange.

[0110] The bottom of the first semi-conical cylinder 33 and the second semi-conical cylinder 34 are both provided with semicircular holes, and the semicircular holes on the first semi-conical cylinder 33 and the semicircular holes on the second semi-conical cylinder 34 form a mounting circular hole 37. The top of the first movable bracket 3 passes through the mounting circular hole 37 and is fixedly connected to the transition section 10 in the second cavity.

[0111] like Figure 2 As shown, for example, the third heat preservation tube 14, the fourth heat preservation tube 15, the fifth heat preservation tube 16 and the sixth heat preservation tube 17 are all square, and each includes a first U-shaped tube 38 and a second U-shaped tube 39, as shown in FIG. Fig.13 and Fig.14 As shown, one side of the first C-shaped tube 38 and one side of the second C-shaped tube 39 are hinged by a plurality of hinges 22, and the other side of the first C-shaped tube 38 and the other side of the second C-shaped tube 39 are detachably connected by a third lock 40. The third heat-insulating tube 14 and the fourth heat-insulating tube 15 are also provided with a third handle 41, which is fixedly provided on the outer side wall of the first C-shaped tube 38 or the second C-shaped tube 39.

[0112] like Fig.15 As shown, the rectangular groove 42 on the first C-shaped tube 38 and the rectangular groove 42 on the second C-shaped tube 39 form a rectangular third cavity 43, the inlet transition section 11 is located in the third cavity 43 of the third insulation tube 14, the fourth insulation tube 15, and the fifth insulation tube 16, and the inlet transition section 11 and the third cavity 43 of the third insulation tube 14, the fourth insulation tube 15, and the fifth insulation tube 16 are filled with insulation material.

[0113] The connection between the inlet transition section 11 and the air inlet of the test piece 92 is located in the third cavity 43 of the sixth insulation tube 17 , and the connection between the inlet transition section 11 and the air inlet of the test piece 92 and the third cavity 43 of the sixth insulation tube 17 are filled with insulation material.

[0114] A third accommodating chamber 44 is provided inside the first C-shaped tube 38 and the second C-shaped tube 39, and the third accommodating chamber 44 is filled with a heat-insulating material. A first C-shaped plate 45 is provided at one end of the first C-shaped tube 38 and the second C-shaped tube 39 close to the transition section 10, and a second C-shaped plate 46 is provided at one end of the first C-shaped tube 38 and the second C-shaped tube 39 close to the air inlet of the test piece 92.

[0115] The first C-shaped plate 45 is provided with a plurality of fifth through holes, the second C-shaped plate 46 is provided with a plurality of sixth through holes, the first C-shaped plate 45 on the first C-shaped tube 38 and the first C-shaped plate 45 on the second C-shaped tube 39 form a fifth flange portion, and the second C-shaped plate 46 on the first C-shaped tube 38 and the second C-shaped plate 46 on the second C-shaped tube 39 form a sixth flange portion.

[0116] The fifth flange of the third insulation tube 14 is connected to the fourth flange of the second insulation tube 13 by bolts, the sixth flange of the third insulation tube 14 is connected to the fifth flange of the fourth insulation tube 15 by bolts, the sixth flange of the fourth insulation tube 15 is detachably connected to the fifth flange of the fifth insulation tube 16 by bolts, and the sixth flange of the fifth insulation tube 16 is detachably connected to the fifth flange of the sixth insulation tube 17.

[0117] For example, the top of the second movable bracket 4 passes through the connection gap at the bottom of the fourth heat-insulating tube 15 and the fifth heat-insulating tube 16 and is fixedly connected to the inlet transition section 11 .

[0118] For example, the vertical cross-sectional area of ​​the sixth heat-insulating tube 17 is greater than the vertical cross-sectional areas of the third heat-insulating tube 14 , the fourth heat-insulating tube 15 , and the fifth heat-insulating tube 16 .

[0119] For example, the detachable heat-insulating structure 2 can also be set to 5 sections or 4 sections as required, and the heat-insulating tube structure can refer to the above implementation.

[0120] like Figure 4 and Figure 5 As shown, the detachable insulation structure of the present invention meets the insulation needs of single-head, multi-head, and full-ring combustion chamber transition sections of different sizes and specifications through insulation tubes of different lengths and shapes.

[0121] Since the inlet transition section 11 has a compact structure and has a flat surface, a curved surface, etc., the first adjustment bracket 18 and the second adjustment bracket 19 should not only be small, but also have the characteristics of adjustable support angle, adjustable height, and adjustable curvature to meet the support needs of the detachable thermal insulation structure 2.

[0122] The detachable heat-insulating structure 2 of the present invention adopts the method of splicing two half-tube structures, etc., so as to improve the efficiency of installation and disassembly.

[0123] like Fig.16 As shown, for example, the first adjustment bracket 18 and the second adjustment bracket 19 have the same structure, both including two height adjustment brackets 47 and an adjustment rod 48. The two height adjustment brackets 47 are vertically arranged, and there is a gap between the two height adjustment brackets 47. The adjustment rod 48 is arranged in the gap, and the two ends of the adjustment rod 48 are respectively fixedly connected to the two height adjustment brackets 47.

[0124] The bottoms of the two height adjustment brackets 47 of the first adjustment bracket 18 are fixedly connected to one end of the inlet transition section 11 close to the metal hose 9 , and the top of the first adjustment bracket 18 is fixedly connected to the inner wall of the third insulation cylinder 14 .

[0125] The bottoms of the two height adjustment frames 47 of the second adjustment bracket 19 are fixedly connected to one end of the inlet adapter section 11 close to the air inlet of the test piece 92 , and the tops of the two height adjustment frames 47 of the second adjustment bracket 19 are fixedly connected to the inner wall of the fifth insulation cylinder 16 .

[0126] like Fig.17 As shown, for example, the height adjustment frame 47 includes a support frame 49, a support leg 50 and an adjustable support foot 51, wherein the bottom of the support frame 49 is slidably connected to the support leg 50, a plurality of mounting holes are provided on the support frame 49 starting from the bottom along the height direction, and a plurality of adjustment bolts are provided on the support leg 50 starting from the top along the height direction, and when the adjustment bolts pass through the mounting holes and are threadedly connected with nuts, the support frame 49 is fixed to the support leg 50. The adjustment bolts at different positions cooperate with the mounting holes at different positions, thereby realizing the adjustment of the height direction of the support frame 49. The bottom of the support leg 50 is rotatably connected to the adjustable support foot 51, thereby realizing the adjustment of the angle of the support frame 49.

[0127] For example, circular holes are provided at the bottom of the supporting legs 50, and the adjustable supporting feet 51 include a base plate 52, two supporting plates 53 and a pin 54. The bottoms of the two supporting plates 53 are fixedly connected to the base plate 52, and the two supporting plates 53 are parallel to each other and have a gap. The bottom of the supporting leg 50 is located in the gap, and the pin 54 fits in the gap of the circular hole. The two ends of the pin 54 are respectively fixed on the two supporting plates 53.

[0128] The adjusting rod 48 includes a first adjusting rod 55 and a second adjusting rod 56. The first adjusting rod 55 is provided with a first slide groove 57 along the length direction, and the second adjusting rod 56 is provided with a second slide groove 58 along the length direction. A sliding pin 59 is slidably connected in the first slide groove 57 and the second slide groove 58.

[0129] One end of the first adjusting rod 55 is fixedly connected to the position of the first supporting leg 50 located above the first adjustable supporting foot 51, one end of the first adjusting rod 55 is fixedly connected to the position of the second supporting leg 50 located above the second adjustable supporting foot 51, and the other end of the first adjusting rod 55 is fixedly connected to the sliding pin 59 in the second sliding groove 58, or the other end of the second adjusting rod 56 is fixedly connected to the sliding pin 59 in the first sliding groove 57.

[0130] By adjusting the overlapping length between the first adjusting rod 55 and the second adjusting rod 56, and the angle between the first adjusting rod 55 and the second adjusting rod 56, the spacing between the two height adjustment frames 47 and the curvature therebetween are adjusted to adapt to the import adapter section 11 with different surface features, so that it can stand stably on the import adapter section 11.

[0131] By adjusting the pin shaft 54 ​​on the adjustable supporting foot 51 , the angle of the adjustable supporting foot 51 can be rotated to ensure that the inlet adapter section 11 can adapt to various surface angles.

[0132] like Figure 3 As shown, for example, the first movable bracket 3 includes a first support platform 60, a first telescopic rod 61, a first connecting plate 62 and a support rod 63, the side wall of the first telescopic rod 61 is fixedly connected to the first support platform 60, and a plurality of rollers are arranged at the bottom of the first support platform 60, for example, a roller is arranged at each of the four corners of the first support platform 60, the top of the first telescopic rod 61 is fixedly connected to the bottom of the support rod 63 through the first connecting plate 62, and the top of the support rod 63 passes through the detachable thermal insulation structure 2 and is supported at a position near the inlet end of the intake pipe assembly 1.

[0133] For example, the second movable bracket 4 includes a second support platform 64, a second telescopic rod 65, a second connecting plate 66 and a first support plate 67. The side wall of the second telescopic rod 65 is fixedly connected to the second support platform 64. A plurality of rollers are arranged at the bottom of the second support platform 64. For example, a roller is arranged at each of the four corners of the second support platform 64. The top of the second telescopic rod 65 is fixedly connected to the bottom of the first support plate 67 through the second connecting plate 66. The top of the first support plate 67 passes through the detachable thermal insulation structure 2 and is supported at a position near the outlet end of the air intake pipe assembly 1. The second connecting plate 66 can also be used as a connection port between the test bench and other platforms.

[0134] For example, the third movable bracket 8 includes a third support platform 68, a third telescopic rod 69, a second support plate 70 and a third connecting plate 71. The side wall of the third telescopic rod 69 is fixedly connected to the third support platform 68. A plurality of rollers are arranged at the bottom of the third support platform 68. For example, a roller is arranged at each of the four corners of the third support platform 68. The top of the third telescopic rod 69 is fixedly connected to the bottom of the second support plate 70 through the third connecting plate 71. The top of the second support plate 70 is supported on one end of the telescopic pipe 6 close to the outlet measuring section 5.

[0135] like Figure 7 As shown, for example, the telescopic pipeline 6 includes an inner sleeve 72, an outer sleeve 73, a loose flange 74 and a clamping flange 75, wherein the outer sleeve 73 is sleeved on the outside of the inner sleeve 72, the top of the third movable bracket 8 is supported on the outer wall of the outer sleeve 73, the length of the inner sleeve 72 is greater than the length of the outer sleeve 73, the loose flange 74 is arranged at one end of the inner sleeve 72 close to the outlet measuring section 5, and the loose flange 74 is detachably connected to the flange of the outlet measuring section 5 close to one end of the inner sleeve 72 by bolts.

[0136] like Fig.18As shown, a first fluid channel 76 is axially arranged inside the tube wall of the inner sleeve 72, and the inner wall surface of the outer sleeve 73 and the outer wall surface of the inner sleeve 72 form a second fluid channel 77, and both ends of the second fluid channel 77 are closed. The inner sleeve 72 is provided with a plurality of connecting holes 78 between the first fluid channel 76 and the second fluid channel 77. The outer sleeve 73 is provided with a cooling water outlet 79 at one end close to the loose flange 74, and the cooling water outlet 79 is connected to the second fluid channel 77. The inner sleeve 72 is provided with a cooling water inlet 80 at one end close to the loose flange 74, and the cooling water inlet 80 is connected to the first fluid channel 76.

[0137] The water in the cooling water inlet 80 is discharged sequentially through the first fluid channel 76, the plurality of connecting holes 78, the second fluid channel 77, and the cooling water outlet 79. To ensure that the cooling water fills the first fluid channel 76, the diameter of the connecting hole 78 is not greater than the diameter of the cooling water inlet 80.

[0138] One end of the outer sleeve 73 away from the loose flange 74 is slidably connected to the exhaust pipe 7 through a sliding structure. Fig.19 and Fig. 20 As shown, for example, the sliding structure includes a sliding groove 81 and a guide rail 82, and the outer sleeve 73 is circumferentially provided with a plurality of sliding grooves 81 at one end away from the loose flange 74, and the lengthwise center line of each sliding groove 81 is parallel to the axial center line of the outer sleeve 73, and the inner wall of the exhaust pipe 7 is circumferentially provided with a plurality of guide rails 82, and each sliding groove 81 corresponds to a guide rail 82, and the lengthwise center line of each guide rail 82 is parallel to the axial center line of the exhaust pipe 7, and each guide rail 82 is slidably connected to a sliding groove 81, and a certain installation gap is left between each sliding groove 81 and the guide rail 82.

[0139] For example, the sliding structure between the outer sleeve 73 and the exhaust pipe 7 can also be realized by a pulley or the like, which will not be described in detail.

[0140] The clamping flange 75 is sleeved on the outer wall of the outer sleeve 73 and is located between the cooling water inlet 80 and the sliding structure. There is a gap between the clamping flange 75 and the outer wall of the outer sleeve 73, and the clamping flange 75 can slide on the outer sleeve 73. An exhaust flange 83 is provided on the exhaust pipe 7. The exhaust flange 83 is sleeved on one end of the exhaust pipe 7 close to the clamping flange 75. The exhaust flange 83 matches the clamping flange 75. A sealing gasket 84 is provided between the exhaust flange 83 and the clamping flange 75 to achieve sealing between the exhaust pipe 7 and the outer sleeve 73 to prevent the outlet exhaust gas from overflowing or the ambient air from being sucked in during the negative pressure test.

[0141] For example, an annular cavity 85 is provided on one side of the exhaust flange 83 close to the clamping flange 75 , a sealing gasket 84 is provided in the annular cavity 85 , the clamping flange 75 and the exhaust flange 83 are fastened with bolts, and the sealing gasket 84 forms a seal between the clamping flange 75 and the exhaust flange 83 .

[0142] like Fig.18 As shown, for example, a boss 86 is provided on the end surface of the clamping flange 75 close to the exhaust flange 83. The boss 86 can be provided to better squeeze the sealing gasket 84 between the exhaust flange 83 and the clamping flange 75, so as to achieve a better sealing effect.

[0143] like Fig.21 As shown, for example, a plurality of notches 87 are circumferentially arranged on the inner side wall of the center hole of the exhaust flange 83, a notch 87 is correspondingly arranged for each sliding groove 81, and a cover plate 88 is also arranged on the side of the notch 87 away from the clamping flange 75. By arranging the notch 87 on the exhaust flange 83, the installation of the exhaust pipe 7 and the telescopic pipe 6 is facilitated.

[0144] For example, three sliding grooves 81, guide rails 82 and notches 87 are each provided, and three notches 87 are provided on the exhaust section flange. When the exhaust flange 83 is connected to the clamping flange 75, the cover plate 88 is installed on the exhaust flange 83 with bolts, so as to prevent the sealing gasket 84 from being squeezed and affecting the sealing effect.

[0145] like Figure 1 and Figure 2 As shown, for example, the test bench also includes a pressure-stabilizing cylinder 89, and a circular cylinder fixing plate 90 is sleeved on the exhaust pipe 7 near the exhaust flange 83. One end of the pressure-stabilizing cylinder 89 is sleeved on the outside of the exhaust pipe 7 and is detachably connected to the cylinder fixing plate 90 by bolts, and the other end of the pressure-stabilizing cylinder 89 is an exhaust port. The diameter of the pressure-stabilizing cylinder 89 is larger than the diameter of the exhaust pipe 7, and the length of the pressure-stabilizing cylinder 89 is larger than the length of the exhaust pipe 7.

[0146] A plurality of support rods 91 are also provided in the pressure stabilizing cylinder 89. The plurality of support rods 91 are arranged along the circumference of the exhaust pipe 7. One end of each support rod 91 is connected to the cylinder fixing plate 90, and the other end of each support rod 91 is connected to the outer wall of the exhaust pipe 7. Each support rod 91 has an angle with the axial center line of the exhaust pipe 7.

[0147] The test bench installation process of the present invention is as follows:

[0148] 1. Remove the fasteners between the compression flange 75 on the telescopic pipe 6 and the exhaust flange 83 of the exhaust pipe 7 to make the telescopic pipe 6 movable.

[0149] 2. Connect the metal hose 9, the transition section 10 and the inlet adapter section 11 in sequence, pull or shrink the telescopic pipe 6 to connect it with the outlet measuring section 5, and ensure that the inlet adapter section 11 is coaxial with the telescopic pipe 6 by moving the transition section 10.

[0150] 3. Tighten the compression flange 75 and the exhaust flange 83 to ensure the sealing effect.

[0151] 4. Complete the wiring work of the test, electrical and other transfer sections.

[0152] 5. Install the first adjustment bracket 18 and the second adjustment bracket 19, and fill the gap between the intake pipe assembly 1 and the detachable insulation structure 2 with insulation material (an insulation board with adhesive backing may be selected), leaving a certain gap.

[0153] 6. Install the detachable thermal insulation structure 2, and use the thermal insulation board to block the contact surface between the detachable thermal insulation structure 2 and the outside to block the air, and the installation is completed.

[0154] The commonly used inlet and outlet of the combustion chamber transition section are DN200 flanges. The air intake component of the present invention solves the problem of the inlet and outlet flanges connected to the transition section during the high-altitude ignition test of the combustion chamber test piece without an environmental simulation cabin by setting a transition section 10 and an inlet transition section 11, and the air outlet component solves the problem of the incompatibility of the inlet and outlet flanges connected to the transition section when there is no environmental simulation cabin. In addition, the cooperation of the transition section 10, the inlet transition section 11 and the pressure-stabilizing cylinder 89 can also play a role in adjusting the height difference between the inlet and outlet of the transition section.

[0155] The test bench of the present invention solves the shortcomings of high construction cost of the environmental simulation cabin, large structural dimensions, complicated work of getting the test piece 92 on and off the platform, and high operation and maintenance costs. At the same time, it overcomes the problems of large temperature drop in the transition section during the high-altitude ignition test of the combustion chamber test piece 92 without an environmental simulation cabin, unsuitability for transition sections of various lengths, and non-universal inlet and outlet flanges connected to the transition section.

[0156] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A universal combustion chamber high altitude test bench without an environmental simulation cabin, characterized in that: include: An air intake component comprises an air intake pipe assembly (1) and a detachable heat-insulating structure (2), wherein the detachable heat-insulating structure (2) is coated on the outside of the air intake pipe assembly (1), and a heat-insulating material is filled between the detachable heat-insulating structure (2) and the air intake pipe assembly (1); The gas outlet component comprises an outlet measuring section (5), a telescopic pipeline (6) and an exhaust pipe (7); the outlet end of the outlet measuring section (5) is detachably connected to one end of the telescopic pipeline (6); the other end of the telescopic pipeline (6) is slidably connected to the inner wall of the exhaust pipe (7); and the outlet measuring section (5), the telescopic pipeline (6) and the exhaust pipe (7) have mutually communicating gas passages.

2. The universal combustion chamber high altitude test bench without an environmental simulation cabin according to claim 1 is characterized in that: The air intake component further comprises a first movable bracket (3) and a second movable bracket (4); The top of the first movable bracket (3) passes through the detachable thermal insulation structure (2) and is supported at a position close to the inlet end of the air intake pipe assembly (1), and the top of the second movable bracket (4) passes through the detachable thermal insulation structure (2) and is supported at a position close to the outlet end of the air intake pipe assembly (1).

3. The universal combustion chamber high altitude test bench without an environmental simulation cabin according to claim 1 is characterized in that: The gas outlet component further comprises a third movable bracket (8), the top of which is supported on one end of the telescopic pipeline (6) close to the outlet measurement section (5).

4. The universal combustion chamber high altitude test bench without an environmental simulation cabin according to claim 1 is characterized in that: The air intake pipe assembly (1) comprises a metal hose (9), a transition section (10) and an inlet transfer section (11) which are connected in sequence; One end of the metal hose (9) is detachably connected to the air intake pipe interface, the other end of the metal hose (9) is detachably connected to one end of the transition section (10), the other end of the transition section (10) is detachably connected to one end of the inlet transition section (11), and the other end of the inlet transition section (11) is detachably connected to the air inlet of the test piece (92).

5. The universal combustion chamber high altitude test bench without an environmental simulation cabin according to claim 4 is characterized in that: The detachable heat-insulating structure (2) comprises a plurality of heat-insulating tubes connected in sequence; each heat-insulating tube is filled with heat-insulating material, two adjacent heat-insulating tubes are detachably connected, and the connection between the two adjacent heat-insulating tubes is filled with heat-insulating material.

6. The universal combustion chamber high altitude test bench without an environmental simulation cabin according to claim 5 is characterized in that: The detachable heat-insulating structure (2) comprises a first heat-insulating tube (12), a second heat-insulating tube (13), a third heat-insulating tube (14), a fourth heat-insulating tube (15), a fifth heat-insulating tube (16) and a sixth heat-insulating tube (17) which are connected in sequence; The first thermal insulation tube (12) is sleeved on the outside of the metal hose (9), the second thermal insulation tube (13) is sleeved on the outside of the transition section (10), the third thermal insulation tube (14), the fourth thermal insulation tube (15) and the fifth thermal insulation tube (16) are sleeved on the outside of the inlet transition section (11), and the sixth thermal insulation tube (17) is sleeved on the outside of the connection between the inlet transition section (11) and the air inlet of the test piece (92).

7. The universal combustion chamber high altitude test bench without an environmental simulation cabin according to claim 6 is characterized in that: The air intake pipe assembly (1) further comprises a first adjustment bracket (18) and a second adjustment bracket (19) arranged inside the detachable heat-insulating structure (2); The bottom of the first adjustment bracket (18) is fixedly connected to one end of the inlet transition section (11) close to the metal hose (9), and the top of the first adjustment bracket (18) is fixedly connected to the inner wall of the third insulation tube (14); the bottom of the second adjustment bracket (19) is fixedly connected to one end of the inlet transition section (11) close to the air inlet of the test piece (92), and the top of the second adjustment bracket (19) is fixedly connected to the inner wall of the sixth insulation tube (17).

8. The universal combustion chamber high altitude test bench without an environmental simulation cabin according to claim 6 is characterized in that: The first heat-insulating cylinder (12) is cylindrical, and comprises a first semi-cylinder (20) and a second semi-cylinder (21); one side of the first semi-cylinder (20) and one side of the second semi-cylinder (21) are hingedly connected via a plurality of hinges (22); the other side of the first semi-cylinder (20) and the other side of the second semi-cylinder (21) are detachably connected via a first lock (23); The first semi-cylinder (20) and the second semi-cylinder (21) are both provided with a semi-circular groove (25) along the axial direction, and the semi-circular groove (25) on the first semi-cylinder (20) and the semi-circular groove (25) on the second semi-cylinder (21) form a cylindrical first cavity (26), the metal hose (9) is located in the first cavity (26), and the space between the metal hose (9) and the first cavity (26) is filled with a heat-insulating material; the first semi-cylinder (20) and the second semi-cylinder (21) are both provided with a first accommodating cavity (27), and the first accommodating cavity (27) is filled with a heat-insulating material.

9. The universal combustion chamber high altitude test bench without an environmental simulation cabin according to claim 8, characterized in that: The first heat-insulating cylinder (12) further comprises a mounting plate (30), wherein the mounting plate (30) is arranged at one end of the first heat-insulating cylinder (12) close to the air intake pipe interface, and the mounting plate (30) comprises an arc-shaped fixing portion (31) and two connecting portions (32), wherein the arc-shaped fixing portion (31) is detachably connected to the flange on the metal hose (9), the bottoms of the two connecting portions (32) are both fixedly connected to the arc-shaped fixing portion (31), and the tops of the two connecting portions (32) are detachably connected to the first semi-cylinder (20) and the second semi-cylinder (21), respectively.

10. The universal combustion chamber high altitude test bench without an environmental simulation cabin according to claim 6, characterized in that: The second heat-insulating cylinder (13) is conical, and comprises a first semi-conical cylinder (33) and a second semi-conical cylinder (34); one side of the first semi-conical cylinder (33) and one side of the second semi-conical cylinder (34) are hingedly connected via a plurality of hinges (22); the other side of the first semi-conical cylinder (33) and the other side of the second semi-conical cylinder (34) are detachably connected via a second lock; The first semi-conical cylinder (33) and the second semi-conical cylinder (34) are both provided with a semi-conical groove (35) along the axial direction, the semi-conical groove (35) on the first semi-conical cylinder (33) and the semi-conical groove (35) on the second semi-conical cylinder (34) form a conical second cavity, the transition section (10) is located in the second cavity, and the transition section (10) and the second cavity are filled with a heat-insulating material; the first semi-conical cylinder (33) and the second semi-conical cylinder (34) are both provided with a second accommodating cavity, and the second accommodating cavity is filled with a heat-insulating material.

11. The universal combustion chamber high altitude test bench without an environmental simulation cabin according to claim 6, characterized in that: The third heat-insulating tube (14), the fourth heat-insulating tube (15), the fifth heat-insulating tube (16) and the sixth heat-insulating tube (17) are all square, and each comprises a first C-shaped tube (38) and a second C-shaped tube (39); one side of the first C-shaped tube (38) and one side of the second C-shaped tube (39) are hingedly connected via a plurality of hinges (22); the other side of the first C-shaped tube (38) and the other side of the second C-shaped tube (39) are detachably connected via a third lock buckle (40); The rectangular groove (42) on the first C-shaped tube (38) and the rectangular groove (42) on the second C-shaped tube (39) form a conical third cavity (43); the first C-shaped tube (38) and the second C-shaped tube (39) are both provided with a third accommodating cavity (44) inside, and the third accommodating cavity (44) is filled with a heat-insulating material; The inlet transition section (11) is located in the third cavity (43) of the third insulation tube (14), the fourth insulation tube (15) and the fifth insulation tube (16), and the space between the inlet transition section (11) and the third cavity (43) of the third insulation tube (14), the fourth insulation tube (15) and the fifth insulation tube (16) is filled with insulation material; the connection between the inlet transition section (11) and the air inlet of the test piece (92) is located in the third cavity (43) of the sixth insulation tube (17), and the connection between the inlet transition section (11) and the air inlet of the test piece (92) and the third cavity (43) of the sixth insulation tube (17) is filled with insulation material.

12. The universal combustion chamber high altitude test bench without an environmental simulation cabin according to claim 7, characterized in that: The first adjustment bracket (18) and the second adjustment bracket (19) structures each include two height adjustment brackets (47) and an adjustment pull rod (48); Wherein, the two height adjustment frames (47) are both arranged vertically, and there is a gap between the two height adjustment frames (47), the adjustment rod (48) is arranged in the gap, and the two ends of the adjustment rod (48) are respectively fixedly connected to the two height adjustment frames (47); The bottoms of the two height adjustment frames (47) of the first adjustment bracket (18) are fixedly connected to one end of the inlet transition section (11) close to the metal hose (9), and the top of the first adjustment bracket (18) is fixedly connected to the inner wall of the third insulation tube (14); the bottoms of the two height adjustment frames (47) of the second adjustment bracket (19) are fixedly connected to one end of the inlet transition section (11) close to the air inlet of the test piece (92), and the tops of the two height adjustment frames (47) of the second adjustment bracket (19) are fixedly connected to the inner wall of the fifth insulation tube (16).

13. The universal combustion chamber high altitude test bench without an environmental simulation cabin according to any one of claims 1 to 12, characterized in that: The telescopic pipeline (6) comprises an inner sleeve (72), an outer sleeve (73), a loose flange (74) and a clamping flange (75); The outer sleeve (73) is sleeved on the outer side of the inner sleeve (72), the loose flange (74) is arranged at one end of the inner sleeve (72) close to the outlet measuring section (5), and the loose flange (74) is detachably connected to the flange of the outlet measuring section (5) close to one end of the inner sleeve (72); A first fluid passage (76) is axially arranged inside the tube wall of the inner sleeve (72); an inner wall surface of the outer sleeve (73) and an outer wall surface of the inner sleeve (72) form a second fluid passage (77); both ends of the second fluid passage (77) are closed; a plurality of connecting holes (78) are arranged between the first fluid passage (76) and the second fluid passage (77) of the inner sleeve (72); a cooling water outlet (79) is arranged at one end of the outer sleeve (73) close to the loose flange (74); a cooling water inlet (80) is arranged at one end of the inner sleeve (72) close to the loose flange (74); the cooling water inlet (80), the first fluid passage (76), the plurality of connecting holes (78), the second fluid passage (77) and the cooling water outlet (79) are sequentially connected; and an end of the outer sleeve (73) away from the loose flange (74) is slidably connected to the exhaust pipe (7) via a sliding structure; The clamping flange (75) is sleeved on the outer wall of the outer sleeve (73) and is located between the cooling water inlet (80) and the sliding structure. The clamping flange (75) can slide on the outer sleeve (73).

14. The universal combustion chamber high altitude test bench without an environmental simulation cabin according to claim 13, characterized in that: An exhaust flange (83) is provided on the exhaust pipe (7), and the exhaust flange (83) is sleeved on one end of the exhaust pipe (7) close to the clamping flange (75). The exhaust flange (83) matches the clamping flange (75), and a sealing gasket (84) is provided between the exhaust flange (83) and the clamping flange (75).

15. The universal combustion chamber high altitude test bench without an environmental simulation cabin according to claim 14, characterized in that: The test bench also includes a pressure stabilizing cylinder (89), and a circular cylinder fixing plate (90) is sleeved on the exhaust pipe (7) near the exhaust flange (83). One end of the pressure stabilizing cylinder (89) is sleeved on the outside of the exhaust pipe (7) and is detachably connected to the cylinder fixing plate (90).

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