Heat insulation cabin device and temperature adjusting method thereof

Abstract

The invention relates to the technical field of aero-engine tests, and discloses a heat insulation cabin device and a temperature adjusting method thereof.The heat insulation cabin device comprises a heat insulation cabin body which comprises an upper cabin cover and a lower cabin body, and the upper cabin cover and the lower cabin body jointly define a heat insulation cabin; the lower cabin body is provided with a first wall body and a second wall body, and the first wall body and the second wall body are spaced to form an air flow channel; a runner inlet and a runner outlet are formed in the lower cabin body, one end of the runner inlet is communicated with the air runner, and the other end of the runner inlet is communicated with the heat insulation cabin; one end of the runner outlet is communicated with the air runner, and the other end is communicated with the air blower; one end of the cold air compensation interface is communicated with the heat insulation cabin, and the other end of the cold air compensation interface is communicated with a cold air source. The heat insulation cabin device provided by the invention can ensure the normal work of the power measurement system in the high and low temperature environment test of the turboshaft engine.

Description

Technical Field

[0001] The invention relates to the technical field of aviation engine testing, and in particular to a heat insulation cabin device and a temperature regulation method thereof. Background Art

[0002] Before a turboshaft engine is finalized, it is necessary to complete high and low temperature environmental tests. In the technical appraisal test, it is necessary to complete an engine vibration measurement test, which involves running the engine at the maximum intake temperature; in the finalization test, it is necessary to complete high and low temperature starting and acceleration tests. In the low temperature test, the engine needs to be started after being immersed in an ambient temperature of -54°C for 10 hours, while in the high temperature test, the engine needs to be started after being immersed in an ambient temperature of 71°C for 10 hours. At present, high and low temperature environmental tests are usually completed on high-altitude simulation test benches or starting law test benches. During the test, a hydraulic dynamometer is used to absorb and measure the engine output shaft power, and a flywheel is used to simulate the engine output shaft speed polar inertia moment. The hydraulic dynamometer and flywheel are collectively referred to as a power measurement system. However, in the prior art, the power measurement system cannot work properly in high and low temperature environmental tests of turboshaft engines. Summary of the invention

[0003] In view of this, the present invention provides a heat insulation cabin device and a temperature regulation method thereof to solve the problem in the prior art that the power measurement system cannot work normally in high and low temperature environment tests of turboshaft engines.

[0004] In a first aspect, the present invention provides a heat insulation cabin device, comprising:

[0005] The heat-insulating cabin body comprises an upper cabin cover and a lower cabin body, wherein the upper cabin cover and the lower cabin body together enclose a heat-insulating cabin, and the heat-insulating cabin is used to accommodate a power measurement system;

[0006] The lower cabin body has a first wall body and a second wall body which are spaced apart from each other, the first wall body is arranged on a side of the second wall body facing the heat-insulating cabin, and a side of the first wall body facing away from the heat-insulating cabin is spaced apart from the second wall body to form an air flow channel;

[0007] The lower cabin body is provided with a flow channel inlet, which is a heat dissipation outlet of the flywheel, one end of which is connected to the air flow channel, and the other end is connected to the heat-insulating cabin; the lower cabin body is also provided with a flow channel outlet, one end of which is connected to the air flow channel, and the other end is connected to the blower;

[0008] The lower cabin body is also provided with a cold air compensation interface, one end of which is connected to the heat-insulating cabin, and the other end of which is connected to the cold air source.

[0009] Beneficial effect: The heat insulation cabin device provided by the present invention, during the low temperature environment test, the outside of the heat insulation cabin body is a low temperature environment simulated by the starting law test bench, usually -60℃~-10℃, the heat insulation cabin is connected to the test room atmosphere, the lower cabin body is provided with an air flow channel, a flow channel inlet and a flow channel outlet, the flow channel inlet is a flywheel heat dissipation port, the flow channel outlet is externally connected to a blower, when the blower is working, the test room atmosphere enters the heat insulation cabin, then enters the flywheel, and then enters the air flow channel through the flow channel inlet, transfers the heat to the lower cabin body, and then is extracted by the blower through the flow channel outlet. In this process, the heat dissipation of the equipment can be extracted by the blower through the flow channel inlet through the air flow channel, and the air dissipates heat when passing through the air flow channel, which has a certain insulation effect on the insulation layer, thereby ensuring that the heat insulation cabin is at normal temperature ( Usually 23℃±5℃) atmosphere, thus solving the problem that the dynamometer cannot work normally in low temperature environment; in high temperature environment test, due to the high temperature environment simulated by the starting law test bench and the friction heat dissipation of the dynamometer and the flywheel themselves, the temperature in the insulated cabin usually reaches 60℃, and a cold air compensation interface is set on the lower cabin body, so that the cold air source is connected to the insulated cabin through the cold air compensation interface, so that the cold air and the hot air in the insulated cabin are mixed to room temperature (usually 23℃±5℃), and then pass through the flow channel inlet, air flow channel and flow channel outlet in turn, and finally are extracted by the blower, thereby solving the problem that the flywheel bearing temperature is too high and the test cannot be carried out during the high temperature environment test, and then ensuring the normal operation of the power measurement system in the high and low temperature environment tests of the turboshaft engine.

[0010] In an optional embodiment, the upper hatch cover and the lower cabin body are arranged opposite to each other along a third direction; the upper hatch cover and the lower cabin body are connected by bolts and / or screws;

[0011] The lower cabin body comprises a first sub-cabin body and a second sub-cabin body, and the first sub-cabin body and the second sub-cabin body are symmetrically arranged along a first direction; the first sub-cabin body and the second sub-cabin body are connected by bolts and / or screws.

[0012] Beneficial effect: By designing the insulation cabin body to be a structure in which the upper cabin cover and the lower cabin body are detachably connected, and the lower cabin body is designed to be a structure in which the first sub-cabin body and the second sub-cabin body are detachably connected, the difficulty of disassembly and assembly due to the overall processing of the cabin body is avoided, which greatly saves the time of equipment disassembly and assembly and maintenance, and improves the efficiency of equipment disassembly and assembly.

[0013] In an optional embodiment, the upper cabin cover and the lower cabin body are connected by handle bolts.

[0014] Beneficial effects: The disassembly and assembly operation is convenient, which is conducive to the rapid installation and disassembly of the upper cabin cover and the lower cabin body, and shortens the disassembly and assembly time.

[0015] In an optional embodiment, a first sealing member is provided between the first sub-cabin body and the second sub-cabin body, and the first sealing member is used to seal between the first sub-cabin body and the second sub-cabin body;

[0016] A second sealing member is provided between the upper hatch cover and the lower cabin body, and the second sealing member is used for sealing between the upper hatch cover and the lower cabin body.

[0017] Beneficial effect: leakage is avoided when connecting between the first sub-cabin body and the second sub-cabin body and between the upper cabin cover and the lower cabin body, thereby ensuring the sealing of the heat-insulating cabin.

[0018] In an optional embodiment, the second sealing member includes a first layer of sealing and a second layer of sealing, and the first layer of sealing and the second layer of sealing form a double-layer seal between the upper cabin cover and the lower cabin body.

[0019] Beneficial effect: Leakage during connection between the upper cabin cover and the lower cabin body is effectively avoided, thus ensuring the sealing of the heat-insulating cabin.

[0020] In an optional embodiment, the first sub-cabin body and the second sub-cabin body both include a first wall body and a second wall body that are spaced apart, and an air flow channel is formed between the first wall body and the second wall body;

[0021] The first sub-cabin body and the second sub-cabin body are both provided with a flow channel inlet and a flow channel outlet;

[0022] The heat insulation cabin device also includes a tee piece, which is used to connect the flow channel outlet with the blower.

[0023] Beneficial effect: By setting a three-way piece, the flow channel outlets of the first sub-cabin body and the second sub-cabin body are connected to the blower, so that the blower can act on the air flow channels of the first sub-cabin body and the second sub-cabin body at the same time, which is beneficial to enhance the air flow effect in the first sub-cabin body and the second sub-cabin body.

[0024] In an optional embodiment, the power measurement system includes a flywheel connected to an output shaft of the turboshaft engine;

[0025] The heat-insulating cabin body is provided with a port; the heat-insulating cabin device further comprises a sealing component, which is provided at the port;

[0026] The sealing assembly includes a sealing pressure plate and a sealing ring. The sealing pressure plate is connected to the heat insulation cabin body by bolts and / or screws, and the sealing ring is connected to the sealing pressure plate by bolts and / or screws. The sealing ring is provided with a comb tooth structure.

[0027] The output shaft of the turboshaft engine passes through a sealing ring and is connected to a flywheel.

[0028] Beneficial effect: Since the pressure inside the insulated cabin is higher than the external environmental pressure, in order to prevent the normal temperature air inside the insulated cabin from leaking into the test chamber, a sealing pressure plate and a sealing ring are arranged at the port of the insulated cabin body, so that the output shaft of the turboshaft engine passes through the sealing ring and is connected to the flywheel, wherein the sealing ring is provided with a comb tooth structure, which is sealed through the comb tooth maze, thereby ensuring the sealing of the insulated cabin and preventing the normal temperature air inside the insulated cabin from leaking into the test chamber.

[0029] In an optional embodiment, a calibration interface is also provided on the heat insulation cabin body;

[0030] The heat-insulating cabin device also includes a sight glass, which is arranged at the calibration interface.

[0031] Beneficial effect: By arranging a sight glass at the calibration interface of the heat insulation cabin body, the operating status of the power measurement system in the heat insulation cabin can be observed through the sight glass.

[0032] In an optional embodiment, a plurality of reinforcing ribs are provided on a side of the heat insulation cabin body facing away from the heat insulation cabin;

[0033] The thermal insulation layer is filled between two adjacent reinforcing ribs;

[0034] The plastic spraying layer is arranged on the side of the thermal insulation layer away from the thermal insulation cabin body.

[0035] Beneficial effects: A thermal insulation layer is formed by filling between two adjacent reinforcing ribs, thereby ensuring the thermal insulation effect of the thermal insulation cabin body; by performing plastic spraying treatment on the side of the thermal insulation layer away from the thermal insulation cabin body and forming a plastic spraying layer, the thermal insulation layer is prevented from falling off and being sucked into the engine intake duct.

[0036] In a second aspect, the present invention further provides a temperature adjustment method for the above-mentioned heat insulation cabin device, comprising:

[0037] When testing under the first temperature T1 condition, the heat-insulating cabin is connected to the atmosphere of the test chamber, the flow channel inlet is the heat dissipation port of the flywheel, and the flow channel outlet is connected to the blower through the tee. When the blower is working, the atmosphere of the test chamber enters the heat-insulating cabin, then enters the flywheel, and then enters the air flow channel through the flow channel inlet, transferring the heat to the lower cabin body, and then collected by the tee and extracted by the blower, thereby ensuring that the heat-insulating cabin is at normal temperature; wherein, the value range of T1 is -60℃≤T1≤-10℃;

[0038] When testing under the second temperature T2 condition, the cold air source is connected to the insulated cabin through the cold air compensation interface, mixed with the hot air in the insulated cabin to room temperature, then enters the air flow channel from the flow channel inlet, and is finally extracted by the blower; wherein, the value range of T2 is -10℃≤T2≤71℃.

[0039] Beneficial effect: The temperature regulation method of the thermal insulation cabin device provided by the present invention not only solves the problem that the dynamometer cannot work normally in a low temperature environment, but also solves the problem that the flywheel bearing temperature is too high and the test cannot be carried out during the high temperature environment test, thereby ensuring the normal operation of the power measurement system in the high and low temperature environment tests of the turboshaft engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] 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.

[0041] Figure 1 is a cross-sectional view of a heat insulation cabin device along a third direction according to an embodiment of the present invention;

[0042] Figure 2 A partial cross-sectional view of a heat insulation cabin device according to an embodiment of the present invention;

[0043] Figure 3 A cross-sectional view of a first sub-cabin body and a second sub-cabin body of a heat insulation cabin device according to an embodiment of the present invention;

[0044] Figure 4 for Figure 1 A local enlarged schematic diagram of the middle A;

[0045] Figure 5 It is a schematic diagram of the sealing principle of the second sealing member of a heat insulation cabin device according to an embodiment of the present invention for the upper cabin cover and the lower cabin body;

[0046] Figure 6 for Figure 1 A partial enlarged schematic diagram of point B in the middle;

[0047] Figure 7 for Figure 6 Schematic diagram of the structure after hiding the insulation layer.

[0048] Description of reference numerals:

[0049] 10. Insulated cabin body; 101. Insulated cabin; 102. Calibration interface; 103. Air flow channel; 104. Flow channel inlet; 105. Flow channel outlet; 106. Cold air compensation interface; 107. Port;

[0050] 11. Upper hatch; 12. Lower cabin; 1201. First wall; 1202. Second wall; 121. First subcabin; 122. Second subcabin; 13. Handle bolt; 14. First seal; 15. Second seal; 151. First layer seal; 152. Second layer seal; 16. Reinforcement ribs; 17. Insulation layer; 18. Plastic spraying layer;

[0051] 20. Blower;

[0052] 30. Cooling source;

[0053] 40. Tee fittings;

[0054] 50. Sealing assembly; 51. Sealing pressure plate; 52. Sealing ring; 521. Comb tooth structure;

[0055] 60. Sight glass;

[0056] X—first direction; Y—second direction; Z—third direction. DETAILED DESCRIPTION

[0057] 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.

[0058] In the related art, high and low temperature environment tests are usually completed on a high-altitude simulation test bench or a starting law test bench. During the test, a hydraulic dynamometer is used to absorb and measure the engine output shaft power. However, the current minimum operating temperature of the hydraulic dynamometer is -10°C. In the low temperature environment of -54°C in the high-altitude environmental chamber, the tension sensor used in the dynamometer has low accuracy and cannot guarantee normal operation. In addition, the dynamometer inlet and outlet pipes are prone to ice in a long-term low-temperature immersion environment, and the dynamometer cannot work properly. Since the hydraulic dynamometer and flywheel run at high speed, their bearings are cooled by lubricating oil circulation. In a high-temperature environment, the friction between the dynamometer and the flywheel and the ambient temperature of the bearing are very high, exceeding the operating temperature range of the lubricating oil, and the dynamometer control system is protected and stopped, affecting the engine test safety. Therefore, both low-temperature and high-temperature environments test the normal operation of the dynamometer and flywheel.

[0059] There are also cases where the dynamometer and flywheel are placed separately in the high-altitude cabin, and the tension sensor is wrapped separately with insulation materials during low-temperature environmental testing. However, due to the long low-temperature immersion time, there is still a possibility that the tension sensor will be frozen. In the high-temperature environment, the temperature of the dynamometer and flywheel bearings reaches the alarm value after a few minutes, and the test cannot continue. There are also starting regularity test benches that use an insulation cabin device to isolate the dynamometer and flywheel from the high and low temperature environments in the high-altitude cabin, but the overall processing of the cabin makes it difficult to disassemble and assemble, and there is also the problem of the flywheel bearing temperature being too high to conduct the test during the high-temperature environmental test.

[0060] Therefore, the present invention provides a heat insulation cabin device and a temperature regulation method thereof to overcome the problem that the power measurement system cannot work normally in high and low temperature environment tests of turboshaft engines.

[0061] Combine the following Figures 1 to 7 , describing an embodiment of the present invention.

[0062] According to an embodiment of the present invention, on the one hand, a heat insulation cabin device is provided, comprising:

[0063] Insulation cabin body 10, see Figure 1 As shown, it includes an upper cabin cover 11 and a lower cabin body 12, the upper cabin cover 11 and the lower cabin body 12 together enclose a heat-insulating cabin 101, and the heat-insulating cabin 101 is used to accommodate a power measurement system;

[0064] See also Figure 3 As shown, the lower cabin body 12 has a first wall body 1201 and a second wall body 1202 arranged at intervals, the first wall body 1201 is arranged on a side of the second wall body 1202 facing the heat-insulating cabin 101, and the first wall body 1201 is spaced from the second wall body 1202 on a side away from the heat-insulating cabin 101 to form an air flow channel 103;

[0065] Please combine Figure 2 and Figure 3 As shown, the lower cabin body 12 is provided with a flow channel inlet 104, which is a heat dissipation outlet for the flywheel, one end of the flow channel inlet 104 is connected to the air flow channel 103, and the other end is connected to the heat insulation cabin 101; the lower cabin body 12 is also provided with a flow channel outlet 105, one end of the flow channel outlet 105 is connected to the air flow channel 103, and the other end is connected to the blower 20;

[0066] The lower cabin body 12 is further provided with a cold air compensation interface 106 , one end of which is connected to the heat-insulating cabin 101 , and the other end of which is connected to the cold air source 30 .

[0067] It should be noted that the "first direction X" herein refers to the width direction of the heat insulation cabin body 10; the "second direction Y" herein refers to the length direction of the heat insulation cabin body 10; and the "third direction Z" herein refers to the height direction of the heat insulation cabin body 10. The heat insulation cabin device is built into the test room, wherein the test room can be a test environment simulated by the starting law test bench, and the pressure is usually 47.2kPa(A) to 101.3kPa(A); the heat insulation cabin 101 is at standard atmospheric pressure; and the heat insulation cabin body 10 can be fixed on the test platform by bolts.

[0068] The heat insulation cabin device provided by the present invention, during the low temperature environment test, the outside of the heat insulation cabin body 10 is a low temperature environment simulated by the starting law test bench, usually -60℃~-10℃, the heat insulation cabin 101 is connected to the test room atmosphere, the lower cabin body 12 is provided with an air flow channel 103, a flow channel inlet 104 and a flow channel outlet 105, the flow channel inlet 104 is a flywheel heat dissipation port, the flow channel outlet 105 is externally connected to the blower 20, the blower 20 is working, the test room atmosphere enters the heat insulation cabin 101, then enters the flywheel, and then enters the air flow channel 103 through the flow channel inlet 104, transfers the heat to the lower cabin body 12, and then is extracted by the blower 20 through the flow channel outlet 105. In this process, the heat dissipation of the equipment can be extracted by the blower 20 through the flow channel inlet 104 through the air flow channel 103, and the air dissipates heat when passing through the air flow channel 103, which has a certain insulation effect on the insulation layer, thereby ensuring the insulation The atmosphere in the thermal chamber 101 is at normal temperature (usually 23°C±5°C), thereby solving the problem that the dynamometer cannot work normally in a low temperature environment; during the high temperature environment test, due to the high temperature environment simulated by the starting law test bench and the friction heat dissipation of the dynamometer and the flywheel themselves, the temperature in the insulated chamber 101 usually reaches 60°C, and a cold air compensation interface 106 is provided on the lower cabin 12, so that the cold air source 30 is connected to the insulated chamber 101 through the cold air compensation interface 106, so that the cold air and the hot air in the insulated chamber 101 are mixed to normal temperature (usually 23°C±5°C), and then sequentially pass through the flow channel inlet 104, the air flow channel 103 and the flow channel outlet 105, and finally are drawn away by the blower 20, thereby solving the problem that the temperature of the flywheel bearing is too high to be tested during the high temperature environment test, and further ensuring the normal operation of the power measurement system in the high and low temperature environment tests of the turboshaft engine.

[0069] In some embodiments, see Figure 1 As shown, the upper hatch cover 11 and the lower cabin body 12 are arranged opposite to each other along the third direction Z; the upper hatch cover 11 and the lower cabin body 12 are connected by bolts and / or screws;

[0070] See also Figure 3As shown, the lower cabin body 12 includes a first sub-cabin body 121 and a second sub-cabin body 122, and the first sub-cabin body 121 and the second sub-cabin body 122 are symmetrically arranged along the first direction X; the first sub-cabin body 121 and the second sub-cabin body 122 are connected by bolts and / or screws.

[0071] Furthermore, the first sub-cabin body 121 and the second sub-cabin body 122 are first connected by bolts and / or screws to form the lower cabin body 12, and the lower cabin body 12 is then fixed to the test platform by bolts, and then the upper cabin cover 11 and the lower cabin body 12 are connected by bolts and / or screws.

[0072] Furthermore, during disassembly and assembly, the lower cabin body 12 and the power measurement system of the heat-insulating cabin 101 can be removed or installed separately.

[0073] By designing the insulation cabin body 10 as a structure in which the upper cabin cover 11 and the lower cabin body 12 are detachably connected, and the lower cabin body 12 is designed as a structure in which the first sub-cabin body 121 and the second sub-cabin body 122 are detachably connected, the difficulty of disassembly and assembly due to the overall processing of the cabin body is avoided, which greatly saves the time of equipment disassembly and assembly and maintenance, and improves the efficiency of equipment disassembly and assembly.

[0074] In some embodiments, see Figure 1 As shown, the upper hatch cover 11 and the lower cabin body 12 are connected by a handle bolt 13, which is convenient for assembly and disassembly, and is conducive to the rapid assembly and disassembly of the upper hatch cover 11 and the lower cabin body 12, thereby shortening the assembly and disassembly time.

[0075] In some embodiments, see Figure 3 As shown, a first sealing member 14 is provided between the first sub-cabin body 121 and the second sub-cabin body 122, and the first sealing member 14 is used to seal the first sub-cabin body 121 and the second sub-cabin body 122;

[0076] See also Figure 4 As shown, a second sealing member 15 is provided between the upper hatch cover 11 and the lower cabin body 12 , and the second sealing member 15 is used to seal between the upper hatch cover 11 and the lower cabin body 12 .

[0077] Furthermore, a third sealing member (not shown) is provided between the lower cabin body 12 and the test platform, and the third sealing member is used to seal between the lower cabin body 12 and the test platform.

[0078] By providing a first seal 14 between the first sub-cabin 121 and the second sub-cabin 122, and providing a second seal 15 between the upper cabin cover 11 and the lower cabin 12, leakage is avoided when connecting between the first sub-cabin 121 and the second sub-cabin 122 and between the upper cabin cover 11 and the lower cabin 12, thereby ensuring the sealing of the insulated cabin 101.

[0079] Furthermore, the first sealing member 14 may be a silicone rubber strip.

[0080] In some embodiments, see Figure 5 As shown, the second seal 15 includes a first seal 151 and a second seal 152. The first seal 151 and the second seal 152 form a double seal between the upper cabin cover 11 and the lower cabin body 12, thereby effectively avoiding leakage when the upper cabin cover 11 and the lower cabin body 12 are connected, and ensuring the sealing of the insulated cabin 101.

[0081] In some embodiments, see Figure 3 As shown, the first sub-cabin body 121 and the second sub-cabin body 122 both include a first wall body 1201 and a second wall body 1202 that are spaced apart, and an air flow channel 103 is formed between the first wall body 1201 and the second wall body 1202;

[0082] The first sub-cabin body 121 and the second sub-cabin body 122 are both provided with a flow channel inlet 104 and a flow channel outlet 105;

[0083] Please combine Figure 1 and Figure 3 As shown, the heat insulation chamber device further includes a tee piece 40 , and the tee piece 40 is used to connect the flow channel outlet 105 with the blower 20 .

[0084] By setting a three-way piece 40, the flow channel outlets 105 of the first sub-cabin body 121 and the second sub-cabin body 122 are connected to the blower 20, so that the blower 20 can act on the air flow channels 103 of the first sub-cabin body 121 and the second sub-cabin body 122 at the same time, which is beneficial to enhancing the air flow effect in the first sub-cabin body 121 and the second sub-cabin body 122.

[0085] In some embodiments, the power measurement system includes a flywheel connected to an output shaft of a turboshaft engine;

[0086] Please combine Figure 1 and Figure 4 As shown, the heat-insulating cabin body 10 is provided with a port 107; the heat-insulating cabin device further comprises a sealing assembly 50, and the sealing assembly 50 is provided at the port 107;

[0087] The sealing assembly 50 includes a sealing pressure plate 51 and a sealing ring 52. The sealing pressure plate 51 is connected to the heat insulation cabin body 10 by bolts and / or screws, and the sealing ring 52 is connected to the sealing pressure plate 51 by bolts and / or screws. The sealing ring 52 is provided with a comb tooth structure 521.

[0088] The output shaft of the turboshaft engine passes through the sealing ring 52 and is connected to the flywheel.

[0089] Furthermore, there is a clearance fit between the sealing ring 52 and the output shaft of the turboshaft engine.

[0090] Since the internal pressure of the insulated cabin 101 is higher than the external environmental pressure, in order to prevent the normal temperature air inside the insulated cabin 101 from leaking into the test chamber, a sealing pressure plate 51 and a sealing ring 52 are provided at the port 107 of the insulated cabin body 10, so that the output shaft of the turboshaft engine passes through the sealing ring 52 and is connected to the flywheel, wherein the sealing ring 52 is provided with a comb tooth structure 521, so as to ensure the sealing of the insulated cabin 101 through the comb tooth maze sealing, thereby preventing the normal temperature air inside the insulated cabin 101 from leaking into the test chamber.

[0091] In some embodiments, see Figure 2 As shown, the heat insulation cabin body 10 is also provided with a calibration interface 102;

[0092] The heat-insulating chamber device further includes a viewing mirror 60 , which is disposed at the calibration interface 102 .

[0093] Furthermore, the viewing mirror 60 is a lighted viewing mirror.

[0094] By providing a sight glass 60 at the calibration interface 102 of the heat-insulating cabin body 10 , the operating status of the power measurement system in the heat-insulating cabin 101 can be observed through the sight glass 60 .

[0095] In some embodiments, please combine Figure 1 , Figure 6 and Figure 7 As shown, a plurality of reinforcing ribs 16 are provided on one side of the heat insulation cabin body 10 facing away from the heat insulation cabin 101;

[0096] The thermal insulation layer 17 is filled between two adjacent reinforcing ribs 16;

[0097] The plastic spraying layer 18 is disposed on a side of the thermal insulation layer 17 away from the thermal insulation cabin body 10 .

[0098] Furthermore, the thermal insulation layer 17 may be a polyurethane foam thermal insulation material.

[0099] An insulation layer 17 is formed by filling between two adjacent reinforcing ribs 16, thereby ensuring the insulation effect of the insulation cabin body 10; and a spray-coated layer 18 is formed by performing plastic spraying on the side of the insulation layer 17 away from the insulation cabin body 10 to prevent the insulation layer 17 from falling off and being sucked into the engine intake duct.

[0100] By adopting the heat insulation cabin device provided by the present invention, the lower cabin body 12 can be disassembled and assembled separately, and the equipment installation time is reduced from 1.5 days before the improvement to about 0.5 days, and the installation efficiency is improved by about 60%.

[0101] The measured results show that by adopting the insulation cabin device provided by the present invention, the test is carried out in a high temperature atmospheric environment (35°C). When the flywheel speed is 10450r / min, the temperature in the insulation cabin 101 is slightly higher than the atmospheric environment. As the flywheel speed increases to 22000r / min, the temperature in the insulation cabin 101 gradually rises to 60°C. At this time, the bearing temperature reaches above 85°C. Low-temperature cold air is introduced into the insulation cabin 101, and the temperature in the insulation cabin 101 gradually decreases to 35°C. The temperature of the flywheel bearing is maintained at about 85°C, and the temperature in the insulation cabin 101 is balanced, meeting the test requirements in a high temperature atmospheric environment.

[0102] According to an embodiment of the present invention, on the other hand, a temperature adjustment method of the above-mentioned heat insulation cabin device is also provided, comprising:

[0103] When testing under the first temperature T1 condition, the heat-insulating chamber 101 is connected to the test chamber atmosphere, the flow channel inlet 104 is the heat dissipation port of the flywheel, and the flow channel outlet 105 is externally connected to the blower 20 through the tee 40. When the blower 20 is working, the test chamber atmosphere enters the heat-insulating chamber 101, then enters the flywheel, and then enters the air flow channel 103 through the flow channel inlet 104, transfers the heat to the lower chamber 12, and then is collected by the tee 40 and extracted by the blower 20, thereby ensuring that the heat-insulating chamber 101 is at normal temperature; wherein, the value range of T1 is -60°C≤T1≤-10°C;

[0104] When testing under the second temperature T2 condition, the cold air source 30 is connected to the insulated cabin 101 through the cold air compensation interface 106, mixed with the hot air in the insulated cabin 101 to room temperature, and then enters the air flow channel 103 through the flow channel inlet 104, and then is extracted by the blower 20; wherein, the value range of T2 is -10℃≤T2≤71℃.

[0105] It should be noted that the thermal insulation chamber is built into the test chamber for testing, and T1 and T2 are the temperatures measured in the test chamber.

[0106] The temperature regulation method of the heat insulation cabin device provided by the present invention not only solves the problem that the dynamometer cannot work normally in a low temperature environment, but also solves the problem that the flywheel bearing temperature is too high and the test cannot be carried out during the high temperature environment test, thereby ensuring the normal operation of the power measurement system in the high and low temperature environment tests of the turboshaft engine.

[0107] 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 heat insulation cabin device, characterized in that: include: A heat-insulating cabin body (10) comprises an upper cabin cover (11) and a lower cabin body (12), wherein the upper cabin cover (11) and the lower cabin body (12) together enclose a heat-insulating cabin (101), and the heat-insulating cabin (101) is used to accommodate a power measurement system; The lower cabin body (12) comprises a first wall body (1201) and a second wall body (1202) which are arranged at an interval, wherein the first wall body (1201) is arranged on a side of the second wall body (1202) facing the heat-insulating cabin (101), and a side of the first wall body (1201) facing away from the heat-insulating cabin (101) is spaced from the second wall body (1202) to form an air flow channel (103); The lower cabin body (12) is provided with a flow channel inlet (104), the flow channel inlet (104) is a heat dissipation outlet for the flywheel, one end of the flow channel inlet (104) is connected to the air flow channel (103), and the other end is connected to the heat-insulating cabin (101); the lower cabin body (12) is also provided with a flow channel outlet (105), one end of the flow channel outlet (105) is connected to the air flow channel (103), and the other end is connected to the blower (20); The lower cabin body (12) is also provided with a cold air compensation interface (106), one end of which is connected to the heat-insulating cabin (101), and the other end of which is connected to a cold air source (30).

2. The heat insulation cabin device according to claim 1, characterized in that: The upper cabin cover (11) and the lower cabin body (12) are arranged relative to each other along a third direction (Z); the upper cabin cover (11) and the lower cabin body (12) are connected by bolts and / or screws; The lower cabin body (12) comprises a first sub-cabin body (121) and a second sub-cabin body (122); the first sub-cabin body (121) and the second sub-cabin body (122) are symmetrically arranged along a first direction (X); and the first sub-cabin body (121) and the second sub-cabin body (122) are connected by bolts and / or screws.

3. The heat insulation cabin device according to claim 2, characterized in that: The upper cabin cover (11) and the lower cabin body (12) are connected via a handle bolt (13).

4. The heat insulation cabin device according to claim 2, characterized in that: A first sealing member (14) is provided between the first sub-cabin body (121) and the second sub-cabin body (122), and the first sealing member (14) is used to seal the first sub-cabin body (121) and the second sub-cabin body (122); A second sealing member (15) is provided between the upper hatch cover (11) and the lower cabin body (12), and the second sealing member (15) is used to seal between the upper hatch cover (11) and the lower cabin body (12).

5. The heat insulation cabin device according to claim 4, characterized in that: The second sealing member (15) comprises a first sealing layer (151) and a second sealing layer (152), wherein the first sealing layer (151) and the second sealing layer (152) form a double-layer seal between the upper cabin cover (11) and the lower cabin body (12).

6. The heat insulation cabin device according to claim 2, characterized in that: The first sub-cabin body (121) and the second sub-cabin body (122) both comprise the first wall body (1201) and the second wall body (1202) which are arranged at an interval, and the air flow channel (103) is formed by the interval between the first wall body (1201) and the second wall body (1202); The first sub-cabin body (121) and the second sub-cabin body (122) are both provided with the flow channel inlet (104) and the flow channel outlet (105); The heat-insulating chamber device further comprises a tee piece (40), wherein the tee piece (40) is used to connect the flow channel outlet (105) with the blower (20).

7. The heat insulation cabin device according to claim 1, characterized in that: The power measurement system includes a flywheel connected to an output shaft of a turboshaft engine; The heat-insulating cabin body (10) is provided with a port (107); the heat-insulating cabin device further comprises a sealing component (50), and the sealing component (50) is provided at the port (107); The sealing assembly (50) comprises a sealing pressure plate (51) and a sealing ring (52); the sealing pressure plate (51) is connected to the heat insulation cabin body (10) by bolts and / or screws, and the sealing ring (52) is connected to the sealing pressure plate (51) by bolts and / or screws; the sealing ring (52) is provided with a comb tooth structure (521); The output shaft of the turboshaft engine passes through the sealing ring (52) and is connected to the flywheel.

8. The heat insulation cabin device according to claim 1, characterized in that: The heat insulation cabin body (10) is also provided with a calibration interface (102); The heat-insulating cabin device further comprises a viewing mirror (60), wherein the viewing mirror (60) is arranged at the calibration interface (102).

9. The heat insulation cabin device according to any one of claims 1 to 8, characterized in that: A plurality of reinforcing ribs (16) are provided on a side of the heat-insulating cabin body (10) facing away from the heat-insulating cabin (101); A heat-insulating layer (17) is filled between two adjacent reinforcing ribs (16); The plastic spraying layer (18) is arranged on a side of the thermal insulation layer (17) away from the thermal insulation cabin body (10).

10. A temperature regulating method for a heat insulation cabin device as claimed in any one of claims 1 to 9, characterized in that: include: When testing under the first temperature T1 condition, the heat-insulating chamber (101) is connected to the test chamber atmosphere, the flow channel inlet (104) is a heat dissipation port of the flywheel, the flow channel outlet (105) is externally connected to the blower (20) through the three-way piece (40), and when the blower (20) is working, the test chamber atmosphere enters the heat-insulating chamber (101), then enters the flywheel, and then enters the air flow channel (103) through the flow channel inlet (104), transfers heat to the lower chamber (12), and then is collected by the three-way piece (40) and extracted by the blower (20), thereby ensuring that the heat-insulating chamber (101) is at normal temperature; wherein the value range of T1 is -60°C≤T1≤-10°C; When testing under the second temperature T2 condition, the cold air source (30) is connected to the insulated cabin (101) through the cold air compensation interface (106), mixed with the hot air in the insulated cabin (101) to room temperature, and then enters the air flow channel (103) through the flow channel inlet (104), and is then extracted by the blower (20); wherein the value range of T2 is -10°C ≤ T2 ≤ 71°C.

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