A core engine testing machine

Abstract

The present application belongs to the field of core engine testing, and is a core engine testing machine, comprising a core engine, a front casing, a rear casing, a front section of an outer casing, and a rear section of an outer casing; the front casing comprises a first supporting mechanism and a first thermal insulation structure, and the rear casing comprises a second supporting mechanism and a second thermal insulation mechanism; the supporting mechanism is used to undertake the functions of supporting, resisting earthquakes, and impact force of the core engine, and the cost is relatively high, while the thermal insulation mechanism is used to undertake the inflow and outflow of high-temperature and high-pressure gases at the inlet and outlet of the core engine, and the cost is relatively low; when conducting tests on different types of core engines, the first supporting mechanism and the second supporting mechanism remain unchanged, the first thermal insulation mechanism and the second thermal insulation mechanism are removed, and then the first thermal insulation mechanism and the second thermal insulation mechanism corresponding to the core engine model are installed without the need for complete disassembly, which is easy to use, and most of the high-cost parts can be reused, which has the effect of reducing development costs and shortening development cycles.

Description

Technical Field

[0001] The present application belongs to the field of core engine testing, and in particular relates to a core engine testing machine. Background Art

[0002] The core engine is an important core component of aircraft engines and gas turbines. The core engine is generally composed of a high-pressure compressor, a combustion chamber and a high-pressure turbine. The core engine has the characteristics of high temperature and high pressure, and the internal working environment is harsh. Therefore, it is necessary to conduct separate tests on the core engine to test the performance of the core engine.

[0003] In order to test the performance of the core engine, a test machine needs to be designed for the core engine. Figure 1 As shown, the core engine test machine is mainly designed with the front casing and the rear casing for the core engine, so as to achieve the purpose of supporting the operation of the core engine and conducting experimental tests.

[0004] In the early stages of core engine development, multiple performance designs will be developed, resulting in core engines with multiple different structural dimensions. If a separate test machine is designed for each solution, it will inevitably lead to increased development costs and longer development cycles.

[0005] Therefore, how to reduce the core engine development cost and shorten the R&D cycle is a problem that needs to be solved. Summary of the invention

[0006] The purpose of this application is to provide a core engine test machine to solve the problems of high R&D cost and long R&D cycle in the core engine R&D in the prior art.

[0007] The technical solution of the present application is: a test machine for a core engine, comprising a core engine, a front casing, a rear casing, a front section of an outer casing and a rear section of an outer casing; the front casing comprises a first supporting mechanism and a first thermal insulation structure, and the rear casing comprises a second supporting mechanism and a second thermal insulation mechanism; the first supporting mechanism is connected to the front section of the outer casing, the first thermal insulation mechanism is arranged in the first supporting mechanism and the first thermal insulation mechanism is detachably fixedly connected to the inlet of the core engine; the second supporting mechanism is connected to the rear section of the outer casing, the second thermal insulation mechanism is arranged in the second supporting mechanism and the second thermal insulation mechanism is detachably fixedly connected to the outlet of the core engine; the first thermal insulation mechanism is detachably fixedly connected to the first supporting mechanism and the connecting part of the first thermal insulation mechanism and the first supporting mechanism can adjust the relative distance between the two; the second thermal insulation mechanism is detachably fixedly connected to the second supporting mechanism and the second thermal insulation mechanism and the second supporting mechanism can adjust the relative distance between the two through the connecting part of the two.

[0008] Preferably, the first heat insulation mechanism comprises a front section of a front flow channel outer ring, a rear section of a front flow channel outer ring, a front section of a front flow channel inner ring and a rear section of a front flow channel inner ring; a high-temperature inlet channel for air intake of the core engine is formed between the front section of the front flow channel outer ring, the rear section of the front flow channel outer ring, the front section of the front flow channel inner ring and the rear section of the front flow channel inner ring; the front section of the front flow channel inner ring is coaxially arranged on the inner side of the front flow channel outer ring front section, the rear section of the front flow channel inner ring is coaxially arranged on the inner side of the rear section of the front flow channel outer ring; the front section of the front flow channel outer ring is bolted to the rear section of the front flow channel outer ring, and the front section of the front flow channel inner ring is bolted to the rear section of the front flow channel inner ring.

[0009] Preferably, a plurality of first fixing sleeves are evenly provided on the outer ring surface of the front section of the outer ring of the front flow channel, and a plurality of first bolt locating pins are correspondingly provided for the first supporting mechanism. The first bolt locating pins are threadedly connected in the first fixing sleeve, and the depth inside the first fixing sleeve is greater than the depth of the first bolt locating pin screwed into the first fixing sleeve; a plurality of second fixing sleeves are evenly provided on the inner ring surface of the front section of the inner ring of the front flow channel, and a plurality of second bolt locating pins are correspondingly provided for the first supporting mechanism. The second bolt locating pins are threadedly connected in the second fixing sleeve, and the depth inside the second fixing sleeve is greater than the depth of the second bolt locating pin screwed into the second fixing sleeve.

[0010] Preferably, the cross-sections of the front section of the outer ring of the front runner and the rear section of the outer ring of the front runner are arranged obliquely downward from the inlet of the front section of the outer ring of the front runner to the inlet of the core engine, and the cross-sections of the front section of the inner ring of the front runner and the rear section of the inner ring of the front runner are arranged obliquely downward from the inlet of the front section of the inner ring of the front runner to the inlet of the core engine.

[0011] Preferably, a first mounting ring with an L-shaped cross-section is provided at the outlet of the rear section of the outer ring of the front flow channel, one side of the first mounting ring is connected to the top bolt of the core engine inlet, a first sealing ring groove is opened at the top of the core engine inlet, and the other side of the first mounting ring is sealed in the first sealing ring groove; a second mounting ring is provided at the outlet of the rear section of the inner ring of the front flow channel, and the second mounting ring is sealed with the bottom of the core engine inlet.

[0012] Preferably, the first supporting mechanism includes a front load-bearing frame, a first supporting ring, a second supporting ring, a front cover and a front bearing seat; the front load-bearing frame is connected to the front section of the outer casing, the first supporting ring is connected between the front load-bearing frame and the front section of the outer ring of the front flow channel, the second supporting ring is connected between the front load-bearing frame and the front section of the inner ring of the front flow channel, the core engine is provided with a first annular supporting frame, the first annular supporting frame is provided with a first comb tooth and a first bearing, the outer side of the front cover is bolted to the front load-bearing frame and the second supporting ring, and the inner side is sealed with the first comb tooth, the outer side of the front bearing seat is bolted to the front load-bearing frame, and the inner side is connected to the first bearing.

[0013] Preferably, the front load-bearing frame includes a front load-bearing outer ring, a front load-bearing support plate and a front load-bearing inner ring, the front load-bearing outer ring and the front load-bearing inner ring are coaxially arranged, the front load-bearing support plate is evenly arranged along the outer circumferential surface direction of the front load-bearing inner ring and the front load-bearing support plate is connected between the front load-bearing outer ring and the front load-bearing inner ring; a first waist-shaped groove is provided between the front section of the front flow channel outer ring and the rear section of the front flow channel outer ring, the front load-bearing support plate is tightly inserted in the first waist-shaped groove, and the front section of the front flow channel outer ring and the rear section of the front flow channel outer ring can slide up and down along the surface of the front load-bearing support plate; a second waist-shaped groove is provided between the front section of the front flow channel inner ring and the rear section of the front flow channel inner ring, the front load-bearing support plate is tightly inserted in the second waist-shaped groove, and the front section of the front flow channel inner ring and the rear section of the front flow channel inner ring can slide up and down along the surface of the front load-bearing support plate.

[0014] Preferably, the second heat insulation mechanism comprises a front section of a rear flow channel outer ring, a middle section of a rear flow channel outer ring, a rear section of a rear flow channel outer ring, a front section of a rear flow channel inner ring, a middle section of a rear flow channel inner ring and a rear section of a rear flow channel inner ring; the front section of the rear flow channel outer ring is detachably fixedly connected to the second supporting mechanism, the front section of the rear flow channel outer ring is tightly snap-fitted with the middle section of the rear flow channel outer ring, the middle section of the rear flow channel outer ring is bolted to the rear section of the rear flow channel outer ring, and the rear section of the rear flow channel outer ring is detachably fixedly connected to the second supporting mechanism; the front section of the rear flow channel inner ring is detachably fixedly connected to the second supporting mechanism, the front section of the rear flow channel inner ring is tightly snap-fitted with the middle section of the rear flow channel inner ring, the middle section of the rear flow channel inner ring is bolted to the rear section of the rear flow channel inner ring, and the rear section of the rear flow channel inner ring is detachably fixedly connected to the second supporting mechanism;

[0015] Preferably, the second supporting mechanism comprises a rear bearing frame, a front upper supporting ring, a rear upper supporting ring, a front lower supporting ring, a rear lower supporting ring, a receiving section, a sealing baffle, a supporting seat, a bearing seat, a front sealing ring and a rear plugging cover; a second supporting ring is provided at the outlet end of the core engine, and a second grate tooth and a second bearing are provided on the second supporting ring; the rear bearing frame is connected to the rear section of the outer casing, the front upper supporting ring is connected between the front section of the outer ring of the rear flow channel and the rear bearing frame, the rear upper supporting ring is connected between the rear section of the outer ring of the rear flow channel and the rear bearing frame, and the front lower supporting ring is connected between the rear section of the outer ring of the rear flow channel and the rear bearing frame. The support ring is connected between the front section of the inner ring of the rear flow channel and the rear load-bearing frame, and the rear lower support ring is connected between the rear section of the inner ring of the rear flow channel and the rear load-bearing frame; the sealing baffle is matched with the bottom seal of the core engine outlet, the receiving section is connected between the rear upper support ring and the sealing baffle, the bearing seat is connected to the second bearing, the support seat is connected between the rear load-bearing frame and the bearing seat, the front sealing ring is bolted to the bearing seat and matched with the second comb tooth seal, the rear plugging cover is bolted to the support seat and the rear plugging cover seals the second support ring of the core engine.

[0016] Preferably, the rear bearing frame comprises a rear bearing outer ring, a rear bearing support plate and a rear bearing inner ring; the rear bearing outer ring and the rear bearing inner ring are coaxially arranged, the rear bearing support plate is evenly arranged along the outer circumferential surface direction of the rear bearing inner ring and the rear bearing support plate is connected between the rear bearing outer ring and the rear bearing inner ring; a third waist-shaped groove is provided between the middle section of the rear flow channel outer ring and the rear section of the rear flow channel outer ring, the rear bearing support plate is tightly inserted in the third waist-shaped groove, and the middle section of the rear flow channel outer ring and the rear section of the rear flow channel outer ring can slide up and down along the surface of the rear bearing support plate; a fourth waist-shaped groove is provided between the middle section of the rear flow channel inner ring and the rear section of the rear flow channel inner ring, the rear bearing support plate is tightly inserted in the fourth waist-shaped groove, and the middle section of the rear flow channel inner ring and the rear section of the rear flow channel inner ring can slide up and down along the surface of the rear bearing support plate.

[0017] A core engine test machine of the present application includes a core engine, a front casing, a rear casing, a front section of an outer casing and a rear section of an outer casing; the front casing includes a first supporting mechanism and a first thermal insulation structure, and the rear casing includes a second supporting mechanism and a second thermal insulation mechanism; the front casing and the rear casing are functionally separated and divided into a thermal insulation mechanism and a supporting mechanism, the supporting mechanism is used to bear the functions of supporting, resisting earthquakes, and impact force of the core engine, and the cost is relatively high, while the thermal insulation mechanism is used to bear the inflow and outflow of high-temperature and high-pressure gases at the inlet and outlet of the core engine, and the cost is relatively low; when conducting tests on different types of core engines, the first supporting mechanism and the second supporting mechanism remain unchanged, the first thermal insulation mechanism and the second thermal insulation mechanism are removed, and then the first thermal insulation mechanism and the second thermal insulation mechanism corresponding to the core engine model are installed without the need for complete disassembly, which is easy to use, and most of the parts with higher costs can be reused, which has the effect of reducing development costs and shortening development cycles. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution provided by the present application, the following is a brief introduction to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present application.

[0019] Figure 1 This is a schematic diagram of the overall structure of this application;

[0020] Figure 2 This is a schematic diagram of the front casing structure of this application;

[0021] Figure 3 for Figure 2 Schematic diagram of the local structure of P3-P3;

[0022] Figure 4 for Figure 2 The schematic diagram of the partial cross-sectional structure of P1-P1;

[0023] Figure 5 for Figure 2 The schematic diagram of the partial cross-sectional structure of P2-P2;

[0024] Figure 6 This is a schematic diagram of the load-bearing frame structure before this application;

[0025] Figure 7 This is a schematic diagram of the rear casing structure of this application;

[0026] Figure 8 for Figure 7 Schematic diagram of the P5-P5 structure;

[0027] Fig. 9 for Figure 7 Schematic diagram of the P6-P6 structure;

[0028] Fig.10 This is a schematic diagram of the structure of the rear load-bearing frame (31) of this application.

[0029] 1. Core engine; 11. First grate teeth; 12. First bearing; 13. Second grate teeth; 14. Second bearing; 2. Front casing; 201. First bolt locating pin; 202. Second bolt locating pin; 203. First fixing sleeve; 204. Second fixing sleeve; 205. First waist-shaped groove; 206. Second waist-shaped groove; 21. Front bearing frame; 211. Front bearing outer ring; 212. Front bearing support plate; 213. Front bearing inner ring; 22. First support ring; 23. Front flow channel outer ring front section; 24. Front flow channel outer ring rear section; 25. Front flow channel inner ring front section; 26. Front flow channel inner ring rear section; 27. Second support ring; 28. Front cover; 29. ​​Front bearing seat; 3. Rear casing; 30 1. Connecting section; 302. Sealing baffle; 303. Support seat; 304. Rear bearing seat; 305. Front sealing ring; 306. Rear upper support ring; 307. Rear lower support ring; 308. Rear plugging cover; 31. Rear load-bearing frame; 311. Rear load-bearing outer ring; 312. Rear load-bearing support plate; 313. Rear load-bearing inner ring; 32. Front upper support ring; 33. Front section of the outer ring of the rear flow channel; 34. Middle section of the outer ring of the rear flow channel; 35. Rear section of the outer ring of the rear flow channel; 36. Front section of the inner ring of the rear flow channel; 37. Middle section of the inner ring of the rear flow channel; 38. Rear section of the inner ring of the rear flow channel; 381. The third waist-shaped groove; 382. The fourth waist-shaped groove; 39. Front lower support ring; 41. Front section of the outer casing; 42. Rear section of the outer casing. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the implementation of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below in conjunction with the drawings in the embodiments of this application.

[0031] A core engine test machine adopts a separated architecture, which can test different models of core engines 1 through structural separation on the one hand and functional separation on the other hand, and reduce R&D costs by replacing a small part of low-cost parts.

[0032] like Figure 1 As shown, the specific scheme includes: a core engine 1, a front casing 2, a rear casing 3, a front section 41 of an outer casing, and a rear section 42 of an outer casing. The front casing 2 is arranged at the entrance of the core engine 1, the rear casing 3 is arranged at the exit of the core engine 1, and the front section 41 of the outer casing and the rear section 42 of the outer casing are installed on the core engine 1.

[0033] The front casing 2 includes a first supporting mechanism and a first thermal insulation structure, and the rear casing 3 includes a second supporting mechanism and a second thermal insulation mechanism; the first supporting mechanism is connected to the front section 41 of the outer casing, the first thermal insulation mechanism is arranged in the first supporting mechanism and the first thermal insulation mechanism is detachably fixedly connected to the inlet of the core engine 1; the second supporting mechanism is connected to the rear section 42 of the outer casing, the second thermal insulation mechanism is arranged in the second supporting mechanism and the second thermal insulation mechanism is detachably fixedly connected to the outlet of the core engine 1; the first thermal insulation mechanism is detachably fixedly connected to the first supporting mechanism and the connecting part of the first thermal insulation mechanism and the first supporting mechanism can adjust the relative distance between the two; the second thermal insulation mechanism is detachably fixedly connected to the second supporting mechanism and the second thermal insulation mechanism and the second supporting mechanism can adjust the relative distance between the two through the connecting part of the two.

[0034] Among the parts of the test machine, the cost of the parts for assuming the supporting function is higher, while the cost of the parts for assuming the heat insulation function is lower. The front casing 2 and the rear casing 3 are functionally separated and divided into a heat insulation mechanism and a support mechanism. The support mechanism is used to assume the supporting, shock-resistant, impact and other functions of the core engine 1, which has a higher cost, while the heat insulation mechanism is used to assume the inflow and outflow of high-temperature and high-pressure gases at the inlet and outlet of the core engine 1, which has a lower cost. At the same time, the heat insulation mechanism and the corresponding support mechanism are connected in a detachable fixed manner, so they can be fixed when needed and disassembled when not needed. The detachable fixed connection methods include bolts, latches, etc.

[0035] When testing the core engine 1, the contained gas first passes through the first insulation structure to enter the entrance of the core engine 1. After being used in the core engine 1, it flows out from the outlet of the core engine 1, and then enters the second insulation structure. Finally, the contained exhaust gas flows out from the second insulation structure. During this period, the contained gas does not pass through the first support structure and the second support structure.

[0036] When conducting tests on different types of core engines 1, the first supporting mechanism and the second supporting mechanism remain unchanged, the first thermal insulation mechanism and the second thermal insulation mechanism are removed, and then the first thermal insulation mechanism and the second thermal insulation mechanism corresponding to the model of the core engine 1 are installed without the need for complete disassembly. It is easy to use, and most of the higher-cost parts can be reused, which has the effect of reducing research and development costs and shortening the development cycle.

[0037] like Figure 2As shown, preferably, the first heat insulation mechanism includes a front flow channel outer ring front section 23, a front flow channel outer ring rear section 24, a front flow channel inner ring front section 25 and a front flow channel inner ring rear section 26, and a high-temperature inlet channel for air intake of the core engine 1 is formed between the front flow channel outer ring front section 23, the front flow channel outer ring rear section 24, the front flow channel inner ring front section 25 and the front flow channel inner ring rear section 26. The front flow channel inner ring front section 25 is coaxially arranged on the inner side of the front flow channel outer ring front section 23, and the front flow channel inner ring rear section 26 is coaxially arranged on the inner side of the front flow channel outer ring rear section 24. The front flow channel outer ring front section 23 is bolted to the front flow channel outer ring rear section 24, and the front flow channel inner ring front section 25 is bolted to the front flow channel inner ring rear section 26.

[0038] An internal air intake channel is formed by segmentally arranging the front flow channel outer ring front section 23, the front flow channel outer ring rear section 24, the front flow channel inner ring front section 25 and the front flow channel inner ring rear section 26, and a segmented structure is formed, which is convenient for disassembly on the one hand, and can be more conveniently coordinated with the first supporting mechanism for stable installation on the other hand.

[0039] like Figure 3 As shown, preferably, a plurality of groups of first fixing sleeves 203 are evenly arranged on the outer ring surface of the front section 23 of the outer ring of the front flow channel, and a plurality of groups of first bolt positioning pins 201 are correspondingly arranged on the first supporting mechanism, and the first bolt positioning pins 201 are threadedly connected in the first fixing sleeve 203, and the depth inside the first fixing sleeve 203 is greater than the depth of the first bolt positioning pins 201 being screwed into the first fixing sleeve 203;

[0040] A plurality of second fixing sleeves 204 are evenly arranged on the inner ring surface of the front section 25 of the inner ring of the front flow channel, and a plurality of second bolt locating pins 202 are correspondingly arranged on the first supporting mechanism. The second bolt locating pins 202 are threadedly connected in the second fixing sleeves 204, and the depth inside the second fixing sleeves 204 is greater than the depth of the second bolt locating pins 202 screwed into the second fixing sleeves 204.

[0041] The front section 23 of the outer ring of the front flow channel, the front section 25 of the inner ring of the front flow channel and the first supporting mechanism are fixed by the cooperation of the fixing sleeve and the bolt locating pin. When installing the front section 23 of the outer ring of the front flow channel and the front section 25 of the inner ring of the front flow channel of different sizes, the first bolt locating pin 201 and the second bolt locating pin 202 are screwed into the first fixing sleeve 203 and the second fixing sleeve 204 at different depths, respectively, so as to fix the first thermal insulation mechanisms of different sizes. The first thermal insulation mechanisms of different sizes can be installed on core engines 1 of different models.

[0042] Preferably, the cross sections of the front flow channel outer ring front section 23 and the front flow channel outer ring rear section 24 are arranged obliquely downward from the inlet of the front flow channel outer ring front section 23 to the inlet of the core engine 1, and the cross sections of the front flow channel inner ring front section 25 and the front flow channel inner ring rear section 26 are arranged obliquely downward from the inlet of the front flow channel inner ring front section 25 to the inlet of the core engine 1. By obliquely arranging the front flow channel outer ring front section 23, the front flow channel outer ring rear section 24, the front flow channel inner ring front section 25 and the front flow channel inner ring rear section 26, the inner flow channel airflow can stably enter the lower inlet position of the core engine 1 from the higher inlet position of the first heat insulation mechanism.

[0043] Preferably, a first mounting ring with an L-shaped cross-section is provided at the outlet of the rear section 24 of the outer ring of the front flow channel, one side of the first mounting ring is connected to the top bolt of the inlet of the core engine 1, a first sealing ring groove is opened at the top of the inlet of the core engine 1, and the other side of the first mounting ring is sealed in the first sealing ring groove; a second mounting ring is provided at the outlet of the rear section 26 of the inner ring of the front flow channel, and the second mounting ring is sealed with the bottom of the inlet of the core engine 1.

[0044] By setting the first mounting ring and the second mounting ring, a stable sealing fit between the rear section 24 of the front flow channel outer ring, the rear section 35 of the rear flow channel outer ring and the inlet of the core engine 1 is achieved, and by bolting the first mounting ring to the core engine 1, the first thermal insulation mechanism is stably fixed to the inlet of the core engine 1.

[0045] Preferably, the first support mechanism includes a front load-bearing frame 21, a first support ring 22, a second support ring 27, a front cover 28 and a front bearing seat 29; the front load-bearing frame 21 is connected to the front section 41 of the outer casing, the first support ring 22 is in an L-structure and one side of the first support ring 22 is bolted to the front load-bearing frame 21, and the other side is bolted to the first bolt locating pin 201; the second support ring 27 is in an L-structure and one side of the second support ring 27 is bolted to the front load-bearing frame 21, and the other side is bolted to the second bolt locating pin 202.

[0046] The stator of the core engine 1 is connected to a first annular support frame, on which a first comb tooth 11 and a first bearing 12 are provided. This part is a conventional structure of the core engine 1 and will not be described in detail here.

[0047] The outer side of the front cover 28 is connected to the front load-bearing frame 21 and the second support ring 27 by the same bolt, and the inner side is tightly matched with the first comb teeth 11 . The outer side of the front bearing seat 29 is bolted to the front load-bearing frame 21 , and the inner side is connected to the first bearing 12 .

[0048] The front load-bearing frame 21 supports and fixes the first heat insulation structure through the first support ring 22 and the second support ring 27. The front cover 28 is used to seal the entrance end of the core engine 1. The front bearing seat 29 is connected to the first bearing 12 to effectively support the front load-bearing frame 21. The front load-bearing frame 21 is supported by the front section 41 of the outer casing and the front bearing seat 29 at the same time to ensure stable support.

[0049] like Figure 4-6 As shown, preferably, the front load-bearing frame 21 includes a front support outer ring 211, a front load-bearing support plate 212 and a front support inner ring 213, the front support outer ring 211 and the front support inner ring 213 are coaxially arranged, the front load-bearing support plate 212 is evenly arranged along the outer circumferential surface direction of the front support inner ring 213, and the front load-bearing support plate 212 is connected between the front support outer ring 211 and the front support inner ring 213;

[0050] A first waist-shaped groove 205 is provided between the front flow channel outer ring front section 23 and the front flow channel outer ring rear section 24, and the front load-bearing support plate 212 is tightly inserted in the first waist-shaped groove 205. After the bolts between the front flow channel outer ring front section 23 and the front flow channel outer ring rear section 24 are screwed off, they can slide up and down along the surface of the front load-bearing support plate 212;

[0051] A second waist-shaped groove 206 is opened between the front section 25 of the inner ring of the front flow channel and the rear section 26 of the inner ring of the front flow channel, and the front load-bearing support plate 212 is tightly inserted in the second waist-shaped groove 206. After the bolts between the front section 25 of the inner ring of the front flow channel and the rear section 26 of the inner ring of the front flow channel are unscrewed, they can slide up and down along the surface of the front load-bearing support plate 212.

[0052] By setting the front load-bearing frame 21 in a ring shape, a larger space can be formed inside while having better supporting strength. The front load-bearing support plate 212 is fixed to each other by opening a first waist-shaped groove 205 between the front flow channel outer ring front section 23 and the front flow channel outer ring rear section 24. The front load-bearing support plate 212 is fixed to each other by opening a second waist-shaped groove 206 between the front flow channel inner ring front section 25 and the front flow channel inner ring rear section 26. When installing first heat insulation mechanisms of different sizes, the front flow channel outer ring front section 23 and the front flow channel outer ring rear section 24 are connected to each other. Segment 24 can slide up and down along the surface of the front load-bearing support plate 212, and the front section 25 of the front flow channel inner ring and the rear section 26 of the front flow channel inner ring can slide up and down along the surface of the front load-bearing support plate 212 to install first thermal insulation mechanisms of different sizes at different positions of the front load-bearing support plate 212. In this way, first thermal insulation mechanisms of different sizes can be stably fixed on the front load-bearing frame 21, and first thermal insulation mechanisms of different sizes can be installed at the entrance of core engines 1 of different sizes. In this way, under the same set of support mechanisms, the assembly of various core engines 1 can be achieved.

[0053] like Figure 7As shown, preferably, the second heat insulation mechanism includes a front section 33 of the outer ring of the rear flow channel, a middle section 34 of the outer ring of the rear flow channel, a rear section 35 of the outer ring of the rear flow channel, a front section 36 of the inner ring of the rear flow channel, a middle section 37 of the inner ring of the rear flow channel and a rear section 38 of the inner ring of the rear flow channel; an annular channel for the internal exhaust gas circulation is formed between the front section 33 of the outer ring of the rear flow channel, the middle section 34 of the outer ring of the rear flow channel, the rear section 35 of the outer ring of the rear flow channel, the front section 36 of the inner ring of the rear flow channel, the middle section 37 of the inner ring of the rear flow channel and the rear section 38 of the inner ring of the rear flow channel. The front section 33 of the outer ring of the rear flow channel is detachably fixedly connected to the second supporting mechanism, the front section 33 of the outer ring of the rear flow channel is tightly matched with the top seal of the outlet of the core engine 1, the front section 33 of the outer ring of the rear flow channel is tightly snap-fitted with the middle section 34 of the outer ring of the rear flow channel, the middle section 34 of the outer ring of the rear flow channel is bolted to the rear section 35 of the outer ring of the rear flow channel, and the rear section 35 of the outer ring of the rear flow channel is detachably fixedly connected to the second supporting mechanism; the front section 36 of the inner ring of the rear flow channel is detachably fixedly connected to the second supporting mechanism, the front section 36 of the inner ring of the rear flow channel is tightly snap-fitted with the middle section 37 of the inner ring of the rear flow channel, the middle section 37 of the inner ring of the rear flow channel is bolted to the rear section 38 of the inner ring of the rear flow channel, and the rear section 38 of the inner ring of the rear flow channel is detachably fixedly connected to the second supporting mechanism; the front section 33 of the outer ring of the rear flow channel is tightly snap-fitted with the top seal of the outlet of the core engine 1, and the second supporting mechanism is tightly matched with the bottom seal of the outlet of the core engine 1.

[0054] Compared with the first insulation mechanism which divides the entire mechanism into the front section and the rear section, the second insulation mechanism divides the entire mechanism into the front section, the middle section and the rear section to achieve sealing and insulation at the outlet of the core engine 1. By setting it into three sections, the space between the first support mechanism and the outlet of the core engine 1 is larger, which can better design the support and sealing structure.

[0055] In addition, by tightly snapping together the front section 33 of the outer ring of the rear flow channel with the middle section 34 of the outer ring of the rear flow channel, and the front section 36 of the inner ring of the rear flow channel with the middle section 37 of the inner ring of the rear flow channel, while ensuring tight sealing, the installation and disassembly of the front section 33 of the outer ring of the rear flow channel and the front section 36 of the inner ring of the rear flow channel are more convenient. The front section 33 of the outer ring of the rear flow channel is detachably fixedly connected to the second supporting mechanism, and the middle section 34 of the outer ring of the rear flow channel is bolted to the rear section 35 of the outer ring of the rear flow channel. The stability of the installation of the second thermal insulation mechanism is ensured by the detachable fixed connection of the rear section 35 of the outer ring of the rear flow channel and the second supporting mechanism, and the installation and fixation of the corresponding structure of the inner ring. When testing different core engines 1, second thermal insulation mechanisms of different sizes can be installed by removing the corresponding bolts and snap-on structures, which is easy to install.

[0056] Preferably, the second supporting mechanism includes a rear bearing frame 31, a front upper supporting ring 32, a rear upper supporting ring 306, a front lower supporting ring 39, a rear lower supporting ring 307, a receiving section 301, a sealing partition 302, a supporting seat 303, a rear bearing seat 304, a front sealing ring 305 and a rear blocking cover 308;

[0057] The outlet end of the core engine 1 is provided with a second support ring 27, on which a second comb tooth 13 and a second bearing 14 are provided. This part is a conventional structure of the core engine 1 and will not be described in detail here.

[0058] The rear bearing frame 31 is connected to the rear section 42 of the outer casing, the front upper support ring 32 is connected between the front section 33 of the rear flow channel outer ring and the rear bearing frame 31, the rear upper support ring 306 is connected between the rear section 35 of the rear flow channel outer ring and the rear bearing frame 31, the front lower support ring 39 is connected between the front section 36 of the rear flow channel inner ring and the rear bearing frame 31, and the rear lower support ring 307 is connected between the rear section 38 of the rear flow channel inner ring and the rear bearing frame 31;

[0059] The sealing partition 302 is sealed with the bottom of the core engine 1 outlet, specifically, the outer ring of the sealing partition 302 is snap-fitted with the core engine 1, the inner ring is provided with sealing grate teeth and is sealed with the core engine 1, and at the same time, the front section 36 of the inner ring of the rear flow channel is sealed with the sealing partition 302; the receiving section 301 is bolted between the rear upper support ring 306 and the sealing partition 302, so that the receiving section 301 and the sealing partition 302 are supported and fixed; the rear bearing seat 304 is connected to the second On the bearing 14, the support seat 303 is connected between the rear load-bearing frame 31 and the rear bearing seat 304, and cooperates with the rear bearing seat 304 to support the rear load-bearing frame 31; the front sealing ring 305 is bolted to the rear bearing seat 304 and is sealed with the second comb teeth 13, the rear plugging cover 308 is bolted to the support seat 303 and the rear plugging cover 308 closes the second support ring 27 of the core engine 1, so that the second support mechanism completely seals the outlet end of the core engine 1.

[0060] The rear load-bearing frame 31 serves as the main load-bearing component at the outlet end of the core engine 1. The connection methods between the front upper support ring 32 and the front section 33 of the rear flow channel outer ring, the front lower support ring 39 and the rear section 35 of the rear flow channel outer ring, the rear upper support ring 306 and the front section of the rear load-bearing outer ring, and the rear lower support ring 307 and the rear section of the rear load-bearing outer ring are the same as the connection method between the first support ring 22 and the front section 23 of the front flow channel outer ring, and are all fixed by threaded connection of bolt locating pins and locating sleeves, and the bolt locating pins can be screwed into different positions of the locating sleeves to realize the adjustment of the distance between the second thermal insulation mechanism and the second support mechanism.

[0061] like Figure 8-10As shown, preferably, the rear bearing frame 31 includes a rear bearing outer ring 311, a rear bearing support plate 312 and a rear bearing inner ring 313; the rear bearing outer ring 311 and the rear bearing inner ring 313 are coaxially arranged, the rear bearing support plate 312 is evenly arranged along the outer peripheral surface direction of the rear bearing inner ring 313 and the rear bearing support plate 312 is connected between the rear bearing outer ring 311 and the rear bearing inner ring 313; a third waist-shaped groove 381 is provided between the middle section 34 of the rear flow channel outer ring and the rear section 35 of the rear flow channel outer ring The rear bearing support plate 312 is tightly inserted in the third waist-shaped groove 381, and the middle section 34 of the rear flow channel outer ring and the rear section 35 of the rear flow channel outer ring can slide up and down along the surface of the rear bearing support plate 312; a fourth waist-shaped groove 382 is opened between the middle section 37 of the rear flow channel inner ring and the rear section 38 of the rear flow channel inner ring, and the rear bearing support plate 312 is tightly inserted in the fourth waist-shaped groove 382, ​​and the middle section 37 of the rear flow channel inner ring and the rear section 38 of the rear flow channel inner ring can slide up and down along the surface of the rear bearing support plate 312.

[0062] The rear bearing frame 31 is configured as an annular support mechanism, which has a large internal space while ensuring the support strength. The second heat insulation mechanism is fixed to the rear bearing support plate 312 by providing the third waist-shaped groove 381 and the fourth waist-shaped groove 382, ​​and the position of the second heat insulation mechanism and the rear bearing frame 31 is adjusted by adjusting the relative position of the third waist-shaped groove 381 and the fourth waist-shaped groove 382 and the rear bearing support plate 312, so that the installation of second heat insulation mechanisms of different sizes and the rear bearing frame 31 can be realized, and second heat insulation mechanisms of different sizes can be installed on core engines 1 of different models.

[0063] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A core engine test machine, comprising a core engine (1), a front casing (2), a rear casing (3), an outer casing front section (41) and an outer casing rear section (42); characterized in that: The front casing (2) comprises a first supporting mechanism and a first heat insulating mechanism, and the rear casing (3) comprises a second supporting mechanism and a second heat insulating mechanism; The first support mechanism is connected to the front section (41) of the outer casing, the first heat insulation mechanism is arranged in the first support mechanism and the first heat insulation mechanism is detachably fixedly connected to the inlet of the core engine (1); the second support mechanism is connected to the rear section (42) of the outer casing, the second heat insulation mechanism is arranged in the second support mechanism and the second heat insulation mechanism is detachably fixedly connected to the outlet of the core engine (1); The first heat insulation mechanism is detachably fixedly connected to the first support mechanism, and the connection portion between the first heat insulation mechanism and the first support mechanism can adjust the relative distance between the two; the second heat insulation mechanism is detachably fixedly connected to the second support mechanism, and the relative distance between the second heat insulation mechanism and the second support mechanism can be adjusted through the connection portion between the two; The first heat insulation mechanism comprises a front flow channel outer ring front section (23), a front flow channel outer ring rear section (24), a front flow channel inner ring front section (25) and a front flow channel inner ring rear section (26); a high-temperature inlet passage for air intake of the core engine (1) is formed between the front flow channel outer ring front section (23), the front flow channel outer ring rear section (24), the front flow channel inner ring front section (25) and the front flow channel inner ring rear section (26); the front flow channel inner ring front section (25) is coaxially arranged on the inner side of the front flow channel outer ring front section (23); the front flow channel inner ring rear section (26) is coaxially arranged on the inner side of the front flow channel outer ring rear section (24); the front flow channel outer ring front section (23) is bolted to the front flow channel outer ring rear section (24); and the front flow channel inner ring front section (25) is bolted to the front flow channel inner ring rear section (26); The first support mechanism comprises a front load-bearing frame (21), a first support ring (22), a second support ring (27), a front cover (28) and a front bearing seat (29); the front load-bearing frame (21) is connected to the front section (41) of the outer casing; the first support ring (22) is connected between the front load-bearing frame (21) and the front section (23) of the outer ring of the front flow channel; the second support ring (27) is connected between the front load-bearing frame (21) and the front section (25) of the inner ring of the front flow channel; a first annular support frame is provided on the core engine (1); a first comb tooth (11) and a first bearing (12) are provided on the first annular support frame; the front cover (28) is bolted to the front load-bearing frame (21) and the second support ring (27) on the outside and sealed to the first comb tooth (11) on the inside; the front bearing seat (29) is bolted to the front load-bearing frame (21) on the outside and connected to the first bearing (12) on the inside.

2. The core engine testing machine according to claim 1, characterized in that: A plurality of groups of first fixing sleeves (203) are evenly arranged on the outer ring surface of the front section (23) of the outer ring of the front flow channel, and a plurality of groups of first bolt positioning pins (201) are correspondingly arranged on the first supporting mechanism, and the first bolt positioning pins (201) are threadedly connected in the first fixing sleeves (203), and the depth inside the first fixing sleeves (203) is greater than the depth of the first bolt positioning pins (201) screwed into the first fixing sleeves (203); A plurality of groups of second fixing sleeves (204) are evenly arranged on the inner ring surface of the front section (25) of the inner ring of the front flow channel, and a plurality of groups of second bolt positioning pins (202) are correspondingly arranged on the first supporting mechanism, and the second bolt positioning pins (202) are threadedly connected in the second fixing sleeves (204), and the depth inside the second fixing sleeve (204) is greater than the depth of the second bolt positioning pins (202) screwed into the second fixing sleeve (204).

3. The core engine testing machine according to claim 1, characterized in that: The cross sections of the front runner outer ring front section (23) and the front runner outer ring rear section (24) are arranged to be inclined downward along the direction from the entrance of the front runner outer ring front section (23) to the entrance of the core engine (1), and the cross sections of the front runner inner ring front section (25) and the front runner inner ring rear section (26) are arranged to be inclined downward along the direction from the entrance of the front runner inner ring front section (25) to the entrance of the core engine (1).

4. The core engine testing machine according to claim 1, characterized in that: A first mounting ring with an L-shaped cross section is provided at the outlet of the rear section (24) of the outer ring of the front flow channel, one side of the first mounting ring is connected to the top bolt of the inlet of the core engine (1), a first sealing ring groove is opened at the top of the inlet of the core engine (1), and the other side of the first mounting ring is tightly fitted in the first sealing ring groove; a second mounting ring is provided at the outlet of the rear section (26) of the inner ring of the front flow channel, and the second mounting ring is tightly fitted in the bottom of the inlet of the core engine (1).

5. The core engine testing machine according to claim 1, characterized in that: The front load-bearing frame (21) comprises a front load-bearing outer ring (211), a front load-bearing support plate (212) and a front load-bearing inner ring (213); the front load-bearing outer ring (211) and the front load-bearing inner ring (213) are coaxially arranged; the front load-bearing support plate (212) is evenly arranged along the outer peripheral surface direction of the front load-bearing inner ring (213); and the front load-bearing support plate (212) is connected between the front load-bearing outer ring (211) and the front load-bearing inner ring (213); A first waist-shaped groove (205) is provided between the front flow channel outer ring front section (23) and the front flow channel outer ring rear section (24), the front load-bearing support plate (212) is tightly inserted into the first waist-shaped groove (205), and the front flow channel outer ring front section (23) and the front flow channel outer ring rear section (24) can slide up and down along the surface of the front load-bearing support plate (212); A second waist-shaped groove (206) is provided between the front flow channel inner ring front section (25) and the front flow channel inner ring rear section (26), the front load-bearing support plate (212) is tightly inserted into the second waist-shaped groove (206), and the front flow channel inner ring front section (25) and the front flow channel inner ring rear section (26) can slide up and down along the surface of the front load-bearing support plate (212).

6. The core engine testing machine according to claim 1, characterized in that: The second heat insulation mechanism comprises a front section (33) of the rear flow channel outer ring, a middle section (34) of the rear flow channel outer ring, a rear section (35) of the rear flow channel outer ring, a front section (36) of the rear flow channel inner ring, a middle section (37) of the rear flow channel inner ring, and a rear section (38) of the rear flow channel inner ring; The front section (33) of the rear flow channel outer ring is detachably fixedly connected to the second support mechanism, the front section (33) of the rear flow channel outer ring is tightly snap-fitted with the middle section (34) of the rear flow channel outer ring, the middle section (34) of the rear flow channel outer ring is bolted to the rear section (35) of the rear flow channel outer ring, and the rear section (35) of the rear flow channel outer ring is detachably fixedly connected to the second support mechanism; The front section (36) of the rear flow channel inner ring is detachably fixedly connected to the second support mechanism, the front section (36) of the rear flow channel inner ring is tightly snap-fitted with the middle section (37) of the rear flow channel inner ring, the middle section (37) of the rear flow channel inner ring is bolted to the rear section (38) of the rear flow channel inner ring, and the rear section (38) of the rear flow channel inner ring is detachably fixedly connected to the second support mechanism; The front section (33) of the outer ring of the rear flow channel is tightly matched with the top seal of the outlet of the core engine (1), and the second supporting mechanism is tightly matched with the bottom seal of the outlet of the core engine (1).

7. The core engine testing machine as claimed in claim 6, characterized in that: The second supporting mechanism comprises a rear bearing frame (31), a front upper supporting ring (32), a rear upper supporting ring (306), a front lower supporting ring (39), a rear lower supporting ring (307), a receiving section (301), a sealing partition (302), a supporting seat (303), a rear bearing seat (304), a front sealing ring (305) and a rear blocking cover (308); The outlet end of the core engine (1) is provided with a second support ring (27), and the second support ring (27) is provided with a second comb tooth (13) and a second bearing (14); The rear bearing frame (31) is connected to the rear section (42) of the outer casing, the front upper support ring (32) is connected between the front section (33) of the outer ring of the rear flow channel and the rear bearing frame (31), the rear upper support ring (306) is connected between the rear section (35) of the outer ring of the rear flow channel and the rear bearing frame (31), the front lower support ring (39) is connected between the front section (36) of the inner ring of the rear flow channel and the rear bearing frame (31), and the rear lower support ring (307) is connected between the rear section (38) of the inner ring of the rear flow channel and the rear bearing frame (31); The sealing baffle (302) is in sealing cooperation with the bottom of the outlet of the core engine (1); the receiving section (301) is connected between the rear upper support ring (306) and the sealing baffle (302); the rear bearing seat (304) is connected to the second bearing (14); the support seat (303) is connected between the rear load-bearing frame (31) and the rear bearing seat (304); the front sealing ring (305) is bolted to the rear bearing seat (304) and is in sealing cooperation with the second comb teeth (13); the rear plugging cover (308) is bolted to the support seat (303) and the rear plugging cover (308) seals the second support ring (27) of the core engine (1).

8. The core engine testing machine as claimed in claim 7, characterized in that: The rear bearing frame (31) comprises a rear bearing outer ring (311), a rear bearing support plate (312) and a rear bearing inner ring (313); The rear bearing outer ring (311) and the rear bearing inner ring (313) are coaxially arranged, the rear bearing support plate (312) is evenly arranged along the outer peripheral surface direction of the rear bearing inner ring (313), and the rear bearing support plate (312) is connected between the rear bearing outer ring (311) and the rear bearing inner ring (313); A third waist-shaped groove (381) is provided between the middle section (34) of the outer ring of the rear flow channel and the rear section (35) of the outer ring of the rear flow channel, and the rear bearing support plate (312) is tightly inserted into the third waist-shaped groove (381), and the middle section (34) of the outer ring of the rear flow channel and the rear section (35) of the outer ring of the rear flow channel can slide up and down along the surface of the rear bearing support plate (312); A fourth waist-shaped groove (382) is provided between the middle section (37) of the inner ring of the rear flow channel and the rear section (38) of the inner ring of the rear flow channel, and the rear load-bearing support plate (312) is tightly inserted into the fourth waist-shaped groove (382), and the middle section (37) of the inner ring of the rear flow channel and the rear section (38) of the inner ring of the rear flow channel can slide up and down along the surface of the rear load-bearing support plate (312).

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