A kind of intake measuring device suitable for high-power turbo-shaft engine test

Abstract

The application provides an air intake measuring device suitable for high-power turbo-shaft engine test, and belongs to an aero-engine testing device.The air intake measuring device comprises an air intake passage main body, a measuring seat is arranged on the outer surface of the air intake passage main body close to an air intake screen, and a measuring sensor is arranged in the measuring seat; the soft connection section comprises an e-shaped sealing ring, the e-shaped sealing ring is arranged between the air intake passage main body and an air intake passage adapter section; the e-shaped sealing ring is hollow, one end of the e-shaped sealing ring is sealingly connected with the inner surface of the air intake passage main body, and the other end of the e-shaped sealing ring is sealingly attached to the outer surface of the air intake passage adapter section. When different types of engines need to be tested, only the air intake passage adapter section needs to be replaced, and the whole air intake passage main body does not need to be redesigned; meanwhile, the e-shaped sealing ring is arranged between the air intake passage adapter section and the air intake passage main body, the e-shaped sealing ring can isolate vibration, prevent gas leakage, and ensure that the connection is stepless, so that the damage of engine vibration to the air intake measuring device is reduced, and the service life of the testing device is prolonged.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of aero-engine testing devices, and particularly relates to an air intake measuring device suitable for high-power turboshaft engine testing. BACKGROUND

[0002] When an aero turboshaft engine is tested on the ground, in order to obtain accurate engine performance parameters, the air intake condition of the engine needs to be measured. The current air intake measuring device is mainly designed in one piece according to the size of the engine interface. When the engine is tested, the engine is vibrated, and then a gap is caused at the connection between the engine and the air intake main body, thereby causing sealing failure. At the same time, different air intake main bodies need to be adapted to different types of engines, causing economic waste.

[0003] The air intake device in the core engine test of a large-bypass-ratio engine disclosed in CN116380472A belongs to the field of aero-engine testing technology, and is used for simulating the whole-machine pressure field in the core engine test of the engine. The device comprises, in sequence along the airflow direction, an inlet guide basin, an air flow measuring section, an expansion section, and an engine inlet adapter section. The expansion section is provided with an inner sleeve for pre-distributing the airflow. The inner sleeve and the expansion section are connected through a plurality of inner-outer sleeve support plates. The air intake device adds a sleeve in the expansion channel, on the one hand, reduces the diameter of the flow tube at the air flow measuring position, so that the Mach number of the airflow therein is between 0.2 and 0.6; on the other hand, changes the flow distribution in the expansion channel, so that the total pressure near the outer casing at the core engine inlet is higher and closer to the pressure field distribution at the core engine inlet under the whole-machine environment, and the test result is closer to the core engine performance under the whole-machine environment.

[0004] The above device discloses that the flow distribution in the expansion channel is changed, but does not explain how the test device is connected with the engine and how to reduce the vibration of the engine. Therefore, a measuring device that can eliminate the vibration between the engine and the air intake main body and can be suitable for different types of engines is needed. SUMMARY

[0005] In view of the above problems, the application provides an air intake measuring device suitable for high-power turboshaft engine testing, which comprises an air intake main body.

[0006] The outer surface of the air intake main body is provided with a measuring seat near the air intake screen cover, and a measuring sensor is installed in the measuring seat.

[0007] The soft connection section comprises an e-shaped sealing ring, which is installed between the air inlet channel body and the air inlet channel adapter section; the e-shaped sealing ring is hollow, and one end thereof is in sealing connection with the inner surface of the air inlet channel body, and the other end thereof is in sealing abutment with the outer surface of the air inlet channel adapter section.

[0008] Further, the opening of the e-shaped sealing ring is located on the side of the air inlet channel body away from the air inlet mesh cover.

[0009] Further, the soft connection section further comprises a blocking ring, which is installed at the end of the air inlet channel body away from the air inlet mesh cover, and the inner diameter of the blocking ring is larger than the outer diameter of the e-shaped sealing ring; the blocking ring is located on the side of the e-shaped sealing ring away from the air inlet channel body.

[0010] Further, the air inlet mesh cover comprises a first mesh cover and a second mesh cover, and the first mesh cover and the second mesh cover are spliced to wrap the end of the air inlet channel body away from the air inlet channel adapter section.

[0011] Further, the first mesh cover comprises a semicircular ring frame, a semicircular frame and a connecting rod, the semicircular ring frame and the semicircular frame are connected through the connecting rod, and the outer surface of the semicircular ring frame, the outer surface of the semicircular frame and the outer surface between the semicircular ring frame and the semicircular frame are wrapped with a metal mesh.

[0012] Further, the air inlet measuring device further comprises a support, the support is provided with a sliding rail; a sliding frame is slidably installed on the sliding rail, the sliding frame is connected with the air inlet channel body through a supporting rod; and the air inlet mesh cover is connected with the sliding frame.

[0013] Further, the supporting rod comprises a handle, a first base connected with the air inlet channel body and a second base connected with the sliding frame; the handle is threadedly connected with the first base and the second base at two ends thereof.

[0014] Further, the outer surfaces of the two ends of the handle are respectively provided with opposite threads.

[0015] Further, the end of the air inlet channel adapter section away from the air inlet channel body is provided with a connecting ring, and the connecting ring is connected with the engine.

[0016] Further, the air inlet channel body is made of carbon fiber composite material.

[0017] The present application has the following advantages:

[0018] 1. When different types of engines need to be tested, only the air inlet channel adapter section needs to be replaced, without the need to redesign the entire air inlet channel body, thereby greatly reducing the expenditure; meanwhile, the e-shaped sealing ring arranged between the air inlet channel adapter section and the air inlet channel body can isolate vibration, prevent gas leakage, ensure the connection without steps and reduce the damage of engine vibration to the air inlet measuring device, thereby prolonging the service life of the testing device.

[0019] 2. The air intake measuring device is fixed on the sliding frame through the air intake cover and the air intake body, and moves synchronously with the engine, so that the air intake measuring device is convenient to disassemble and separate from the engine.

[0020] 3. The handle is provided with opposite threads at two ends, the first base and the second base are threadedly connected with the handle, and stepless adjustment in height is realized by rotating the handle. On one hand, the air intake measuring device is convenient to disassemble and separate from the engine, and on the other hand, the handle can bear axial thermal expansion of the engine caused by heating during the test.

[0021] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the application. The objects and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0023] Figure 1 The overall schematic diagram of the air intake measuring device in the embodiment of the present application is shown.

[0024] Figure 2 The partial structure schematic diagram of the air intake measuring device in the embodiment of the present application is shown.

[0025] Figure 3 The structure schematic diagram of the support rod of the air intake measuring device in the embodiment of the present application is shown.

[0026] Figure 4 The installation position and the partial enlarged structure schematic diagram of the soft connection section of the air intake measuring device in the embodiment of the present application are shown.

[0027] In the figure, 1 is an air intake body, 2 is an air intake adapter section, 3 is a soft connection section, 31 is an e-shaped sealing ring, 32 is a check ring, 4 is a measuring seat, 5 is an air intake cover, 51 is a first cover, 511 is a semicircular ring frame, 512 is a semicircular frame, 513 is a connecting rod, 52 is a second cover, 53 is a buckle, 6 is a support rod, 61 is a handle, 62 is a first base, 63 is a second base, 7 is a support, 8 is a sliding rail, 9 is a sliding frame, and 10 is a connecting ring. DETAILED DESCRIPTION

[0028] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0029] As shown in Figure 1 , Figure 1 The overall schematic diagram of the air intake measuring device in the embodiments of the present application is shown. Referring to Figure 1 , an air intake measuring device suitable for high-power turboshaft engine test includes an air intake main body 1, an air intake adapter 2 connected to one end of the air intake main body 1 through a soft connection section 3, and an air intake screen 5 installed at the other end of the air intake main body 1. Specifically, the air intake main body 1 bears the air intake measuring function, and the air intake adapter 2 bears the connection function. When the engine inlet size changes, only the air intake adapter 2 needs to be replaced to realize the modification, which can reduce the expenditure.

[0030] The outer surface of the air intake main body 1 is provided with a measuring seat 4 near the air intake screen 5, and a measuring sensor is installed in the measuring seat 4. The measuring sensor includes a pressure sensor, a temperature sensor and the like. Referring to Figure 4 , the soft connection section 3 includes an e-shaped sealing ring 31 installed between the air intake main body 1 and the air intake adapter 2. The e-shaped sealing ring 31 is hollow, and one end is sealingly connected to the inner surface of the air intake main body 1, and the other end is sealingly attached to the outer surface of the air intake adapter 2. The hollow e-shaped sealing ring 31 can eliminate the vibration of the engine and achieve sealing. If a solid core sealing ring is used, the vibration of the engine cannot be well eliminated, which drives the air intake main body 1 to vibrate. At the same time, the e-shaped sealing ring 31 is hollow at the upper end and has an opening at the lower end, which can integrate the vibration of the larger engine.

[0031] Specifically, the design of the e-shaped sealing ring 31 can isolate vibration, prevent gas leakage, and ensure that the connection has no step. Through the design of the air intake adapter 2, when the engine inlet size changes, only the air intake adapter 2 needs to be replaced, without the need to redesign the entire air intake main body 1, which greatly reduces the expenditure. And the e-shaped sealing ring 31 is connected to the air intake main body 1, which isolates the vibration of the engine driving the air intake main body 1, reduces the damage to the air intake main body 1 and the measuring sensor on the air intake main body 1, and prolongs the service life of the air intake measuring device.

[0032] Specifically, the opening of the e-shaped sealing ring 31 is located on the side of the air intake main body 1 away from the air intake screen 5. The installation of the e-shaped sealing ring 31 has directionality, which is away from the air intake direction to prevent the opening from being blown open by the airflow.

[0033] In the above embodiment, optionally another embodiment is that the soft connection section 3 further comprises a retaining ring 32, the retaining ring 32 is installed at the end of the air inlet duct body 1 away from the air inlet mesh cover 5, and the inner diameter of the retaining ring 32 is greater than the outer diameter of the e-shaped sealing ring 31; the retaining ring 32 is located at the side of the e-shaped sealing ring 31 away from the air inlet duct body 1. Specifically, the retaining ring 32 is used to prevent the air inlet duct body 1 from being separated from the air inlet duct adapter section 2, and facilitates disassembly and assembly. When installing, the e-shaped sealing ring 31 is adsorbed on the outer surface of the air inlet duct adapter section 2, inserted into the air inlet duct body 1, and then fixed by the retaining ring 32, so that the retaining ring 32 blocks the e-shaped sealing ring 31, prevents the e-shaped sealing ring 31 and the air inlet duct adapter section 2 from being separated from the air inlet duct body 1, prevents the air inlet duct body 1 from being separated from the air inlet duct adapter section 2, and facilitates disassembly and assembly.

[0034] Reference Figure 2 The air inlet mesh cover 5 comprises a first mesh cover 51 and a second mesh cover 52, and the first mesh cover 51 and the second mesh cover 52 are spliced to wrap the end of the air inlet duct body 1 away from the air inlet duct adapter section 2. Specifically, the first mesh cover 51 and the second mesh cover 52 are fixedly connected by buckles 53, facilitating disassembly and assembly. The air inlet mesh cover 5 fixes the metal mesh with the mesh skeleton by stainless steel rivets, and fuses the rivets with the mesh by spot welding, preventing the rivets from falling off.

[0035] Further, the first mesh cover 51 and the second mesh cover 52 respectively comprise a semi-circular ring frame 511, a semi-circular frame 512 and a connecting rod 513, the semi-circular ring frame 511 and the semi-circular frame 512 are connected by the connecting rod 513, and the outer surfaces of the semi-circular ring frame 511, the semi-circular frame 512 and the outer surfaces between the semi-circular ring frame 511 and the semi-circular frame 512 are wrapped with metal mesh.

[0036] Specifically, when installing, the semi-circular ring frame 511 is sleeved on the air inlet duct body 1, and the inner diameter of the semi-circular ring frame 511 is slightly larger than the outer diameter of the air inlet duct body 1, so as to realize relatively tight sealing and prevent dust and impurities from entering the air inlet duct body 1; the two semi-circular frames 512 are spliced to form a complete circular plate, thereby realizing sealing, and the outer sides of the semi-circular ring frame 511, the semi-circular frame 512 and the semi-circular ring frame 511 and the semi-circular frame 512 are wrapped with metal mesh, thereby wrapping the air inlet of the air inlet duct body 1 and realizing omnidirectional filtering.

[0037] Further, the air inlet mesh cover 5 is fixed on the same base as the air inlet duct body 1, and can move synchronously with the engine; that is, fixed on the sliding frame 9; the first mesh cover 51 and the second mesh cover 52 are fixedly connected by buckles 53, facilitating disassembly and assembly. The air inlet mesh cover 5 fixes the metal mesh with the mesh skeleton by stainless steel rivets, and fuses the rivets with the mesh by spot welding, preventing the rivets from falling off.

[0038] In the embodiment of the present application, the air intake measuring device further comprises a support 7, and a sliding rail 8 is arranged on the support 7; a sliding frame 9 is slidably arranged on the sliding rail 8, and the sliding frame 9 is connected with the air intake passage body 1 through the support rod 6; and the air intake cover 5 is connected with the sliding frame 9. Specifically, the sliding frame 9 is slid on the sliding rail 8, thereby driving the air intake cover 5 and the air intake passage body 1 to move synchronously, and the air intake measuring device is conveniently connected with the engine. Specifically, when the engine is heated and expanded, since the engine is fixed, the air intake passage body 1 connected with the engine will move along the sliding rail 8, thereby overcoming the movement caused by the expansion of the engine, and fine adjustment is realized. Figure 3 The support rod 6 comprises a handle 61, a first base 62 connected with the air intake passage body 1, and a second base 63 connected with the sliding frame 9; and the handle 61 is threadedly connected with the first base 62 and the second base 63 at two ends thereof. Two support rods 6 are designed, and the two support rods 6 are connected between the sliding frame 9 and the air intake passage body 1. A metal clamp is arranged on the first base 62, and a rubber pad is arranged on the inner side of the metal clamp, which is used to prevent the metal clamp from damaging the air intake passage body 1. The first base 62 and the second base 63 are of different threads, and can be rotated through the handle 61 on the support rod 6, thereby driving the first base 62 and the second base 63 to move towards or away from each other, and stepless adjustment in height is realized by rotating different numbers of turns, thereby fine adjustment of the height of the air intake passage body 1 is realized, and the air intake measuring device is conveniently connected with the engine, and the connection precision is improved. On the one hand, the support rod 6 facilitates separation of the air intake measuring device from the engine after the air intake measuring device is disassembled, and on the other hand, the support rod 6 can withstand the axial thermal expansion of the engine caused by heating during the test.

[0039] Further, the outer surfaces of the two ends of the handle 61 are respectively provided with different threads. Specifically, the first base 62 and the second base 63 can be driven to move towards or away from each other by rotating the handle 61 on the support rod 6, and stepless adjustment in height is realized by rotating different numbers of turns.

[0040] In the above embodiment, alternatively, another embodiment is that a connecting ring 10 is arranged on the outer side of the end of the air intake passage adapter 2 away from the air intake passage body 1, and the connecting ring 10 is connected with the engine. The connecting ring 10 is connected in the clamping manner, and is convenient and fast to disassemble from the engine.

[0041] In combination with the embodiment of the present application, the air intake passage body 1 is made of carbon fiber composite material. The use of the carbon fiber composite material makes the air intake measuring device light in weight, and facilitates carrying and installation. The air intake passage body 1 made of carbon fiber composite material is high in strength and light in weight, and is convenient to disassemble and assemble; the inner wall of the air intake passage body 1 should be polished smooth to reduce the flow resistance of the engine intake boundary layer, and should not be painted to prevent falling pieces from endangering the safety of the engine.

[0042] Working principle:

[0043] When the air inlet body 1 is used, the support 7 is placed on one side of the engine air inlet of the engine to be tested, a sliding rail 8 is arranged on the support 7, a sliding frame 9 is slidably installed on the sliding rail 8, and a supporting rod 6 is installed on the sliding frame 9, the second base 63 of the supporting rod 6 is fixedly connected with the sliding frame 9, a handle 61 is threadedly connected on the second base 63, a first base 62 is threadedly installed on the other end of the handle 61, a metal clamp is arranged on the first base 62, a rubber pad is arranged on the inner side of the metal clamp, the rubber pad is used to prevent the metal clamp from damaging the air inlet body 1, the air inlet body 1 can move along the axial direction of the air inlet body 1, that is, slide in the metal clamp of the first base 62, and then the distance and position between the air inlet body 1 and the engine can be adjusted, so that the air inlet body 1 and the engine are conveniently connected; a measuring seat 4 is arranged on the outer surface of the air inlet body 1, and a pressure sensor and a temperature sensor are installed in the measuring seat 4, which are used to measure the dimensions and pressure in the air inlet body 1 in real time.

[0044] The first mesh cover 51 and the second mesh cover 52 both comprise a semicircular ring frame 511 and a semicircular frame 512, the semicircular ring frame 511 and the semicircular frame 512 are connected through a connecting rod 513, metal nets are wrapped outside the semicircular ring frame 511 and the semicircular frame 512 and between the semicircular ring frame 511 and the semicircular frame 512, the first mesh cover 51 and the second mesh cover 52 are fixedly connected through buckles 53, and the first mesh cover 51 and the second mesh cover 52 are buckled and installed at the outlet of the air inlet body 1 and surround the outlet to prevent dust from entering; the first mesh cover 51 and the second mesh cover 52 are both installed on the sliding frame 9 through the buckles 53, and the air inlet body 1 and the air inlet mesh cover 5 are driven to move synchronously through the sliding frame 9, so that the position is adjusted;

[0045] An air inlet adapter 2 is arranged at the connection end of the air inlet body 1 and the engine, an e-shaped sealing ring 31 is installed between the air inlet adapter 2 and the air inlet body 1, the e-shaped sealing ring 31 is fixedly connected with the outer surface of the air inlet adapter 2 at one end and is sealingly connected with the inner surface of the air inlet body 1 at the other end (at this time, the e-shaped sealing ring 31 is compressed to make the e-shaped sealing ring 31 sealingly contact with the inner surface of the air inlet body 1), the air inlet adapter 2 can shake inside the air inlet body 1, so as to reduce the vibration of the engine; a connecting ring 10 is arranged on the outer side of the end of the air inlet adapter 2 away from the air inlet body 1, the connecting ring 10 is connected with the air inlet of the engine, and the connecting ring 10 is a clamp, so that quick connection and disconnection can be realized.

[0046] Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood that modifications can be made to the foregoing embodiments, or additional implementations of the present application can be implemented, without departing from the spirit or scope of the application. Accordingly, the present application is not limited except as by the appended claims.

Claims

1. An air intake measurement device suitable for testing a high-power turboshaft engine, characterized in that: It comprises an air intake duct main body (1), one end of the air intake duct main body (1) is connected to an air intake duct transition section (2) via a soft connection section (3), and the other end is equipped with an air intake mesh cover (5); A measuring seat (4) is provided on the outer surface of the air inlet main body (1) near the air inlet mesh cover (5), and a measuring sensor is installed in the measuring seat (4); The soft connection section (3) includes an E-shaped sealing ring (31), which is installed between the air inlet duct body (1) and the air inlet duct transition section (2); the E-shaped sealing ring (31) is hollow, and one end is sealed and connected to the inner surface of the air inlet duct body (1), and the other end is sealed and fitted to the outer surface of the air inlet duct transition section (2); The opening of the E-shaped sealing ring (31) is located on a side of the air inlet duct body (1) away from the air inlet mesh cover (5); The soft connection section (3) further comprises a retaining ring (32), which is mounted on one end of the air inlet duct body (1) away from the air inlet mesh cover (5), and the inner diameter of the retaining ring (32) is larger than the outer diameter of the E-type sealing ring (31); the retaining ring (32) is located on the side of the E-type sealing ring (31) away from the air inlet duct body (1).

2. The air intake measurement device for high-power turboshaft engine testing according to claim 1, characterized in that: The air intake mesh cover (5) comprises a first mesh cover (51) and a second mesh cover (52), wherein the first mesh cover (51) and the second mesh cover (52) are spliced ​​together to wrap around an end of the air intake main body (1) away from the air intake transition section (2).

3. The air intake measurement device for high-power turboshaft engine testing according to claim 2, characterized in that: The first mesh cover (51) comprises a semicircular frame (511), a semicircular frame (512) and a connecting rod (513), wherein the semicircular frame (511) and the semicircular frame (512) are connected via the connecting rod (513), and the outer surface of the semicircular frame (511), the outer surface of the semicircular frame (512) and the outer surface between the semicircular frame (511) and the semicircular frame (512) are wrapped with a metal mesh.

4. The air intake measurement device for high-power turboshaft engine testing according to claim 1, characterized in that: The air intake measuring device further comprises a bracket (7), a slide rail (8) being provided on the bracket (7); a slide frame (9) being slidably mounted on the slide rail (8), and the slide frame (9) being connected to the air intake duct body (1) via a support rod (6); and the air intake mesh cover (5) being connected to the slide frame (9).

5. The air intake measurement device for high-power turboshaft engine testing according to claim 4, characterized in that: The support rod (6) comprises a handle (61), a first base (62) connected to the air inlet main body (1), and a second base (63) connected to the sliding frame (9); both ends of the handle (61) are respectively threadedly connected to the first base (62) and the second base (63).

6. The air intake measurement device for high-power turboshaft engine testing according to claim 5, characterized in that: The outer surfaces of both ends of the handle (61) are respectively provided with different-direction threads.

7. The air intake measurement device for high-power turboshaft engine testing according to claim 1, characterized in that: A connecting ring (10) is provided on the outer side of one end of the air intake duct transition section (2) away from the air intake duct main body (1), and the connecting ring (10) is connected to the engine.

8. The air intake measurement device for high-power turboshaft engine testing according to claim 1, characterized in that: The air intake duct body (1) is made of carbon fiber composite material.

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