Intake section assembly and pressure control system and method therefor

Abstract

An intake segment assembly is described, comprising: a first intake segment; the first air inlet section and the second air inlet section are each of a hollow structure with the two ends open, the first air inlet section can axially move relative to the second air inlet section, and the first air inlet section is provided with a first relative position and a second relative position relative to the second air inlet section; when the first air inlet section is located at a first relative position relative to the second air inlet section, the first air inlet section and the second air inlet section are connected in a sealed and sleeved mode, and when the first air inlet section is located at a second relative position relative to the second air inlet section, the air inlet section assembly is provided with a radial air channel. The radial air channel penetrates through the sleeved connection portion of the first air inlet section and the second air inlet section so that inside and outside ventilation of the air inlet section assembly can be achieved, and the first air inlet section is configured to axially move from the second relative position to the first relative position under the action of at least one actuator cylinder.

Description

Technical Field

[0001] This invention relates to the field of aero-engine testing technology, and more particularly to an air intake assembly and a pressure control system and method for the air intake assembly. Background Technology

[0002] During aero-engine testing, the airflow provided by the aero-engine test bench needs to be fed into the test specimen (e.g., compressor test specimen) through one or more air intake sections. Generally, the air intake section is a truncated cone structure that is open at both ends and closed in the middle, and its cross-sectional area perpendicular to the axial direction (i.e., the flow area of ​​the airflow) varies. Figure 1 A perspective view of an air intake section 100 of a prior art aero-engine test bench is shown. As indicated by the arrows in the figure, the airflow provided by the aero-engine test bench (not shown) enters the air intake section 100 from the rear end of the air intake section and then flows out from the front end of the air intake section into the test specimen (not shown). On the other hand, during the test, when the operating state of the test specimen changes, the pressure of the airflow within the air intake section 100 changes accordingly, which in turn causes a change in the pressure difference between the airflow inside and outside the air intake section 100. The pressure difference between the airflow inside and outside the air intake section 100 causes the air intake section 100 to be subjected to an axial force along the engine's rotation axis. Under some extreme conditions, the pressure of the airflow within the air intake section 100 can become particularly high, resulting in the air intake section 100 being subjected to an extremely large axial force.

[0003] Axial forces transmitted to the test specimen can damage it. To prevent axial forces from being transmitted to the test specimen, an improved intake section structure has been proposed. Figure 2 A partial longitudinal cross-sectional schematic diagram of an air intake assembly 100 for an aero-engine test bench, based on existing technology, is shown. Figure 2 As shown, the intake section assembly 100 may include a front section 10 and a rear section 20. Airflow from the aero-engine test bench flows into the intake section assembly 100 from the rear end of the rear section 20 and then exits from the front end of the front section 10. The front section 10 may include a front end 11 and a rear end 13. The front end 11 of the front section 10 is used to connect to a test piece, and the rear end 13 of the front section 10 has a neck that is fitted into the front end 21 of the rear section 20. The rear end 23 of the rear section 20 can be fixed. Figure 2 The A-A line in the diagram represents the axis of rotation of the engine. When the intake section assembly 100 is subjected to a large axial force, the position of the rear section 20 remains unchanged, while the position of the front section 10 moves along... Figure 2 As shown in the figure, the axial movement in direction B eventually causes the front section 10 to completely separate from the rear section 20, so as to allow the high-pressure airflow in the intake section assembly 100 to be discharged, reduce or eliminate the internal and external pressure difference of the intake section assembly 100, thereby avoiding damage to the test piece.

[0004] However, in the structure of the improved intake section assembly 100 described above, the front section 10 and the rear section 20 must be reassembled by external intervention after complete separation. Understandably, such reassembly will interrupt the test and require a waiting period before the test can continue. If the separation of the front section 10 and the rear section 20 occurs repeatedly, it will inevitably greatly delay the test process, causing the scheduled test tasks to fail to be completed on time, and thus affecting the execution of subsequent tasks.

[0005] Therefore, a new type of air intake section for aero-engine test bench is needed to improve or solve the aforementioned technical problems that delay the test process. Summary of the Invention

[0006] One object of the present invention is to provide an air intake assembly for an aero-engine test bench, which can be used to reduce or eliminate the pressure difference between the airflow inside and outside the air intake assembly.

[0007] Another object of the present invention is to provide a pressure control system for an intake section assembly, which can prevent the front and rear sections of the intake section assembly from separating, thereby avoiding test interruption.

[0008] Another object of the present invention is to provide a pressure control method for an intake section assembly, which can prevent the front and rear sections of the intake section assembly from separating and avoid test interruption.

[0009] According to a first aspect of the present invention, an intake section assembly is provided, comprising: a first intake section; and a second intake section, wherein both the first and second intake sections are hollow structures with openings at both ends, the first intake section is axially movable relative to the second intake section, the first intake section has a first relative position and a second relative position relative to the second intake section, when the first intake section is in the first relative position relative to the second intake section, the first intake section and the second intake section are sealed together, when the first intake section is in the second relative position relative to the second intake section, the intake section assembly has a radial air passage that penetrates the sleeved portion of the first intake section and the second intake section to allow air to pass through the inside and outside of the intake section assembly, and the first intake section is configured to move axially from the second relative position to the first relative position under the action of at least one actuating cylinder.

[0010] In at least one embodiment of the first aspect of the invention, at least one of the first intake section and the second intake section has a circumferentially extending rib, and the rib forms at least a portion of a radial air passage when the first intake section is in a second relative position to the second intake section.

[0011] In at least one embodiment of the first aspect of the invention, the first intake segment and the second intake segment each have at least one circumferentially extending rib hole, and when the first intake segment is in a second relative position with respect to the second intake segment, at least one rib hole of the first intake segment is at least partially aligned with the corresponding rib hole of the second intake segment.

[0012] In at least one embodiment of the first aspect of the invention, the first intake segment has a plurality of circumferentially extending first rib holes located at the same axial position of the first intake segment, the second intake segment has a plurality of circumferentially extending second rib holes located at the same axial position of the second intake segment, and when the first intake segment is in a second relative position to the second intake segment, each first rib hole of the first intake segment is at least partially aligned with a corresponding second rib hole on the second intake segment.

[0013] In at least one embodiment of the first aspect of the present invention, a plurality of circumferentially extending first rib holes are circumferentially and uniformly distributed on the first intake section, and a plurality of circumferentially extending second rib holes are circumferentially and uniformly distributed on the second intake section.

[0014] In at least one embodiment of the first aspect of the present invention, the circumferential angle of the first rib hole on the first intake section is greater than the circumferential angle between adjacent first rib holes, and the circumferential angle of the second rib hole on the second intake section is greater than the circumferential angle between adjacent second rib holes.

[0015] In at least one embodiment of the first aspect of the invention, the sum of the circumferential angles of all the first rib holes on the first intake section is greater than the sum of the circumferential angles of the interval between all adjacent first rib holes, and the sum of the circumferential angles of all the second rib holes on the second intake section is greater than the sum of the circumferential angles of the interval between all adjacent second rib holes.

[0016] In at least one embodiment of the first aspect of the present invention, the intake section assembly further includes a sealing ring, the first intake section having a circumferential annular groove for receiving the sealing ring, and the sealing ring being located between a first rib hole on the first intake section and a second rib hole on the second intake section when the first intake section is in a first relative position to the second intake section.

[0017] In at least one embodiment of the first aspect of the invention, the outer surface of the first intake segment has at least one flange, at least one actuating cylinder is disposed at a predetermined position near the first intake segment, and the piston of the at least one actuating cylinder has a first limit position and a second limit position. When the first intake segment moves axially from the first relative position to the second relative position relative to the second intake segment, the first intake segment pushes the piston of the at least one actuating cylinder to compress to the second limit position via the at least one flange. The at least one actuating cylinder is configured to push the at least one flange by extending the piston to the first limit position, such that the first intake segment moves axially from the second relative position to the first relative position.

[0018] In at least one embodiment of the first aspect of the present invention, the inner diameter of the first port of the first intake segment is smaller than the inner diameter of its second port, the second port of the first intake segment is used to fit onto the first port of the second intake segment, and the second port of the second intake segment is fixed.

[0019] In at least one embodiment of the first aspect of the invention, the cross section of the first intake segment along the axial direction is generally truncated conical.

[0020] In at least one embodiment of the first aspect of the present invention, the intake section assembly is an intake section for a compressor test bench.

[0021] According to a second aspect of the invention, a pressure control system for any of the above-described intake section components is provided, the pressure control system comprising: a first pressure sensor configured to monitor a first pressure within the intake section component; and a controller communicatively connected to the first pressure sensor and at least one actuator, the controller being configured to control at least one actuator to axially move a first intake section from a second relative position to a first relative position in response to a detected first pressure within the intake section component decreasing to equal to or less than a pressure threshold.

[0022] In at least one embodiment of the second aspect of the invention, the pressure control system further includes a second pressure sensor configured to monitor a second pressure outside the intake section assembly, and the controller is configured to control at least one actuator to axially move the first intake section from the second relative position to the first relative position in response to the difference between the monitored first pressure and the monitored second pressure decreasing to be equal to or less than a pressure difference threshold.

[0023] In at least one embodiment of the second aspect of the present invention, the pressure control system further includes: at least one actuator, the at least one actuator being disposed at a predetermined position near the first intake section, the piston of the at least one actuator having a first limit position and a second limit position, wherein when the piston is at the first limit position, the first intake section is in a first relative position relative to the second intake section, and when the piston is in the second limit position, the first intake section is in a second relative position relative to the second intake section.

[0024] According to a third aspect of the present invention, a pressure control method for any of the above-mentioned intake section assemblies is provided, comprising: monitoring a first pressure within the intake section assembly; and, in response to the monitored first pressure within the intake section assembly decreasing to be equal to or less than a second pressure threshold, controlling at least one actuator to axially move a first intake section from a second relative position to a first relative position.

[0025] In at least one embodiment of the third aspect of the present invention, when the first pressure rises to be equal to or greater than the first pressure threshold, the first intake section moves axially from the first relative position to the second relative position relative to the second intake section under the action of the internal airflow.

[0026] In at least one embodiment of the third aspect of the invention, the first pressure threshold is in the range of 1.2-1.5 times the standard atmospheric pressure, the second pressure threshold is in the range of 1.0-1.1 times the standard atmospheric pressure, and the first pressure threshold is greater than the second pressure threshold.

[0027] In at least one embodiment of the third aspect of the invention, the method further includes: monitoring a second pressure outside the intake section; and controlling an actuator to axially move the first intake section from a second relative position to a first relative position in response to the difference between the monitored first pressure and the monitored second pressure decreasing to be equal to or less than a second pressure difference threshold.

[0028] In at least one embodiment of the third aspect of the present invention, the method further includes: when the difference between the first pressure and the second pressure rises to be equal to or greater than the first pressure difference threshold, the first intake section moves axially from the first relative position to the second relative position relative to the second intake section under the action of the internal airflow.

[0029] In at least one embodiment of the third aspect of the invention, the first pressure difference threshold is in the range of 0.2-0.5 times the standard atmospheric pressure, the second pressure difference threshold is in the range of 0-0.1 times the standard atmospheric pressure, and the first pressure difference threshold is greater than the second pressure difference threshold.

[0030] Compared with the prior art, the technical solution proposed in this invention has at least one or more of the following beneficial effects:

[0031] By providing rib holes on the front section, rear section, or both of the intake section assembly, when the intake section assembly moves axially relative to the rear section due to axial force, the high-pressure airflow inside the intake section assembly can be discharged through the air passage formed by the rib holes, thereby reducing or eliminating the pressure difference between the airflow inside and outside the intake section assembly.

[0032] By placing an actuator near the flange on the outer periphery of the intake section assembly, the axial movement range of the front section of the intake section assembly is limited, preventing the front and rear sections of the intake section assembly from separating.

[0033] A pressure sensor is used to monitor the airflow pressure within the intake section assembly. When the airflow pressure within the intake section assembly or the pressure difference between the inside and outside of the intake section assembly drops to a reasonable level, the control actuator pushes the flange located on the outer periphery of the intake section assembly, causing the air passage formed by the rib holes to close automatically without interrupting the test. Attached Figure Description

[0034] The above-described and other features, properties, and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always denote the same or similar features. It should be noted that these drawings are merely illustrative and are not drawn to scale, and should not be construed as limiting the scope of the actual claims of the present invention. In the drawings:

[0035] Figure 1 A perspective view of an air intake section for an aero-engine test bench using existing technology is shown.

[0036] Figure 2 A partial longitudinal cross-sectional schematic diagram of an air intake assembly for an aero-engine test bench using existing technology is shown.

[0037] Figure 3 A partial longitudinal cross-sectional schematic diagram of an intake section assembly in a first state, according to some embodiments of the present invention, is shown.

[0038] Figure 4 A partial longitudinal cross-sectional schematic diagram of an intake section assembly in a second state, according to some embodiments of the present invention, is shown.

[0039] Figure 5 A partial longitudinal cross-sectional schematic diagram of the intake section assembly in a third state according to some embodiments of the present invention is shown;

[0040] Figure 6A A front view of the front section of an intake section assembly according to some embodiments of the present invention is shown;

[0041] Figure 6B The following are some embodiments of the invention. Figure 6AA schematic diagram of the transverse cross section intercepted by the BA-BA line shown.

[0042] Figure 6C Some embodiments of the present invention are shown. Figure 6B A magnified view of part BB shown;

[0043] Figure 7A A front view of the rear section of the intake section assembly according to some embodiments of the present invention is shown;

[0044] Figure 7B The following are some embodiments of the invention. Figure 7A A schematic diagram of the transverse cross section intercepted by the CB-CB line shown;

[0045] Figure 7C Some embodiments of the present invention are shown. Figure 7B A magnified view of the CC section shown;

[0046] Figure 8A - Figure 8B A block diagram of a pressure control system for an intake section assembly according to some embodiments of the present invention is shown; and

[0047] Figure 9A - Figure 9B A flowchart of a pressure control method for an intake section assembly according to some embodiments of the present invention is shown.

[0048] Explanation of some figure labels :

[0049] 100-Intake section, 10-Front section, 11-First end of front section, 13-Second end of front section, 14-Front section flange, 142-Front end face of front section flange, 144-Rear end face of front section flange, 15-Neck of front section, 152-Rib hole of front section, 153-Front section spacer, 154-Annular groove, 156-Sealing ring, 158-Rear end face of neck of front section, 171-Front end face of first end of rear section, 20-Rear section, 21-First end of rear section, 23-Second end of rear section, 200-Intake section assembly, 211-Front end face of first end of rear section, 212-Rear section rib hole, 30-Actuator cylinder, 31-Piston rod, 32-Modible end face of actuator cylinder. Detailed Implementation

[0050] The present invention will be further described below with reference to specific embodiments and accompanying drawings. More details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention can obviously be implemented in many other ways different from those described herein. Those skilled in the art can make similar extensions and derivations based on actual application situations without departing from the spirit of the present invention. Therefore, the scope of protection of the present invention should not be limited by the content of this specific embodiment.

[0051] In the following description, the terms "front," "rear," "inner," "outer," "center," "upper," "lower," "left," "right," "vertical," "horizontal," or other directional terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Terms such as "contraction," "elongation," or other operational terms are relative to the state before operation or the state at the previous moment, and do not indicate or imply that the device or component referred to must have a specific state. Furthermore, terms such as "first," "second," etc., are used for descriptive purposes only, such as distinguishing different features, and should not be construed as indicating or implying relative importance. In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "connected," "coupled," and "attached" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two elements. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0052] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "one embodiment," "other embodiments," and / or "some embodiments" refer to a particular feature, structure, or characteristic related to at least one embodiment of the application. Therefore, it should be emphasized and noted that "one embodiment," "other embodiments," or "some embodiments" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0053] It should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments, the description of the embodiments of the present application may sometimes combine multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the application requires more features than those mentioned in the claims.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0055] I. Intake Section Assembly

[0056] The following is for reference Figure 3 - Figure 5 The structure of the intake section assembly 200 according to some embodiments of the present invention is described, wherein Figure 3 , Figure 4 and Figure 5 The relative positional relationship between the front section 10 and the rear section 20 of the intake section assembly 200 under different states is shown. Figure 3 , Figure 4 and Figure 5 On the right side, enlarged views of the portion circled by circle C in the left cross-sectional view are shown.

[0057] In some embodiments, such as Figure 3 - Figure 5 As shown, the intake section assembly 200 may include a front section 10 and a rear section 20.

[0058] The front section 10 may have a first front end 11 and a second front end 13. The first front end 11 can be used to connect a test piece (not shown), and the second front end 13 may include a front flange 14 and a front neck 15. The front flange 14 has a front face 142 and a rear face 144, wherein an actuating cylinder 30 may be disposed in front of the front face 142, the actuating cylinder 30 being configured such that the movable end face 32 of its piston rod 31 faces the front face 142 of the front flange 14. The front neck 15 may include one or more front rib holes 152, each front rib hole 152 being radially permeable through the front neck 15 (see...). Figure 3 (Partial enlarged view on the right). When there are multiple front rib holes 152, the multiple front rib holes 152 can be distributed circumferentially along the front neck 15, and in some embodiments, they are evenly distributed circumferentially along the front neck 15.

[0059] The rear section 20 may have a rear section first end 21 and a rear section second end 23. The rear section first end 21 may be sleeved outside the front section neck 15 and allow the front section neck 15 to move axially relative to the rear section first end 21. The rear section first end 21 may include one or more rear section rib holes 212, each rear section rib hole 212 extending radially through the rear section first end 21.

[0060] The front neck 15 may also include an annular groove 154 for placing a sealing ring 156.

[0061] The first end 21 of the rear section can be interference-fitted with the sealing ring 156. There can be a gap between the front end face 211 of the first end 21 of the rear section and the rear end face 144 of the front flange 14.

[0062] The second end 23 of the rear section can be fixed to a predetermined device on the test bench.

[0063] exist Figures 3-5In the illustrated embodiment, the front flange 14 is located at the second end 13 of the front segment and is adjacent to the neck 15 of the front segment. In other embodiments, the front flange 14 may be located between the first end 11 of the front segment and the second end 13 of the front segment, separated from the neck 15 by a distance.

[0064] exist Figures 3-5 In the illustrated embodiment, the anterior neck 15 and the rear first end 21 each have one or more rib holes. In other embodiments, at least one of the anterior neck 15 and the rear first end 21 has one or more rib holes.

[0065] In some embodiments, the front rib hole 152 and the rear rib hole 212 are completely corresponding in the circumferential direction. In other embodiments, the front rib hole 152 and the rear rib hole 212 may be partially corresponding in the circumferential direction.

[0066] exist Figures 3-5 In the illustrated embodiment, the rear first end 21 is sleeved outside the front neck 15, in which case the inner circumferential surface of the rear first end 21 may be located outside the outer circumferential surface of the front neck 15. In other embodiments, the front neck 15 may be sleeved outside the rear first end 21, in which case the inner circumferential surface of the front neck 15 may be located outside the outer circumferential surface of the rear first end 21.

[0067] In some embodiments, the piston of the actuator 30 may have two extreme positions, including a contraction limit position and an extension limit position. In other embodiments, the piston of the actuator 30 may have only one of the contraction limit position and the extension limit position.

[0068] In some embodiments, a plurality of actuators 30 may be provided, and the number of the plurality of actuators 30 may be equal to or not equal to the number of front rib holes 152. The circumferential distribution of the plurality of actuators 30 may correspond to or at least partially correspond to the circumferential distribution of the front rib holes 152.

[0069] Figure 3 A partial longitudinal cross-sectional schematic diagram of the intake section assembly 200 in a first state according to some embodiments of the present invention is shown. In the first state, the front section 10 and the rear section 20 are in a sealed sleeve state, and the front section 10 has a first relative position with respect to the rear section 20 in the axial direction.

[0070] In embodiments where both the front section 10 and the rear section 20 have rib holes, when the intake section assembly 200 is in the first state, the rear section rib hole 212 is located axially in front of the front section rib hole 152. In some embodiments, the rear section rib hole 212 and the front section rib hole 152 are located on both sides of the sealing ring 156.

[0071] When the intake section assembly 200 is in the first state, the piston rod 31 of the actuator cylinder 30 is in the initial state. In some embodiments, when the piston rod 31 of the actuator cylinder 30 is in the initial state, the movable end face 32 of the piston rod 31 of the actuator cylinder 30 can be separated from the front end face 142 of the front flange 14 by a predetermined distance. In other embodiments, when the piston rod 31 of the actuator cylinder 30 is in the initial state, the movable end face 32 of the piston rod 31 of the actuator cylinder 30 can abut against the front end face 142 of the front flange 14.

[0072] In some embodiments, the first state may be the initial state when the test is started. In other embodiments, the first state may be the state after the test has been interrupted and then resumed.

[0073] When the pressure within the intake section assembly 200 increases to the point that the axial force on the intake section assembly exceeds a predetermined value (e.g., the frictional force between the contact surfaces of the front neck 15 and the rear first end 21), the front section 10 will move axially relative to the rear section 20 in the B direction. During this movement, the axial position of the front section rib hole 152 gets closer and closer to the rear section rib hole 212, and the axial position of the flange front end face 142 also gets closer and closer to the movable end face 32 of the piston rod 31. Under the action of the axial force, the flange front end face 142 may meet the movable end face 32 of the piston rod 31, further pushing the piston rod 31 to retract until it reaches its retraction limit position.

[0074] When the piston rod 31 retracts to its retraction limit position, it will prevent the front section 10 from moving further axially in the B direction. At this time, the intake section assembly 200 is in the second state.

[0075] Figure 4 A partial longitudinal cross-sectional schematic diagram of the intake section assembly 200 in a second state according to some embodiments of the present invention is shown. In the second state, the front section 10 and the rear section 20 are in an exhaust sleeve state, and the front section 10 has a second relative position with respect to the rear section 20 in the axial direction.

[0076] In embodiments where both the front section 10 and the rear section 20 have rib holes, when the intake section assembly 200 is in the second state, at least one front section rib hole 152 can be aligned with at least one rear section rib hole 212 at the same axial position to form an air passage that can connect the inside and outside of the intake section assembly 200 in the radial direction, so as to allow high-pressure gas inside the intake section assembly 200 to be discharged from the air passage.

[0077] In embodiments where only the front section 10 has a rib hole, when the intake section assembly 200 is in the second state, the gap between the rear end face 144 of the front flange 14 and the front end face 171 of the rear first end 21 can communicate with the front rib hole 152, forming an air passage to allow high-pressure gas inside the intake section assembly 200 to be discharged from the air passage. In the second state, the front end face 171 of the rear first end 21 can radially communicate with the rear wall of the front rib hole 152 ( Figure 4 The right wall of the front rib hole 152 shown is aligned, or the first end 21 of the rear section may be located axially behind the front rib hole 152 but still sleeved outside part of the front neck 15.

[0078] In embodiments where only the rear section 20 has a rib hole, when the intake section assembly 200 is in the second state, the rear section rib hole 212 communicates with the interior of the intake section assembly 200, forming an air passage to allow high-pressure gas inside the intake section assembly 200 to be discharged from the air passage. In the second state, the rear end face 158 of the front neck 15 may radially connect with the front wall of the rear section rib hole 212. Figure 4 The left wall of the rear rib hole 212 shown is aligned, or the front neck 15 may be located axially in front of the rear rib hole 212 but the first end 21 of the rear section is still sleeved outside part of the front neck 15.

[0079] In some embodiments, when the intake section assembly 200 is in the second state, the sealing ring 156 is located between the rear end face 144 of the front flange 14 and the front end face 171 of the rear first end 21.

[0080] After the high-pressure gas in the intake section assembly 200 is discharged from the air passage for a period of time, causing the pressure in the intake section assembly 200 to drop to a reasonable or preset level, the controller controls the piston rod 31 of the actuator cylinder 30 to extend, pushing the front section 10 to move axially in the opposite direction of direction B until it reaches the extension limit position. In some embodiments, when the piston rod 31 is at the extension limit position, there may be a gap between the rear end face 144 of the front flange 14 and the front end face 171 of the rear first end 21. This gap can be... Figure 3 In the first state shown, the gap between the two is the same. In some other embodiments, when the piston rod 31 is at its elongation limit position, the rear end face 144 of the front flange 14 meets the front end face 171 of the rear first end 21. In still other embodiments, when the piston rod 31 is at its elongation limit position, the rear end face 144 of the front flange 14 and the front end face 171 of the rear first end 21 may be at... Figure 3 The position between the gap and the meeting point is shown.

[0081] When the piston rod 31 extends to its extension limit, the intake section assembly 200 is in the third state.

[0082] Figure 5A partial longitudinal cross-sectional schematic diagram of the intake section assembly 200 in a third state according to some embodiments of the present invention is shown. In the third state, the front section 10 and the rear section 20 are in a sealed sleeve state, and the front section 10 has a third relative position in the axial direction relative to the rear section 20. The third relative position may be the same as or different from the first relative position.

[0083] In embodiments where both the front section 10 and the rear section 20 have rib holes, when the intake section assembly 200 is in the third state, the rear section rib hole 212 is located axially in front of the front section rib hole 152, and the front section 10 and the rear section 20 are in a sealed sleeve state. In some embodiments, the rear section rib hole 212 and the front section rib hole 152 are located on both sides of the sealing ring 156, respectively.

[0084] In some embodiments, after the intake section assembly 200 is in the third state, the controller controls the actuator 30 to retract the piston rod 31 to its initial state. When the piston rod 31 retracts to its initial state, the movable end face 32 of the piston rod 31 may move away from the front end face 142 of the front flange 14 by a predetermined distance (e.g., Figure 3 (As shown). In other embodiments, after the intake section assembly 200 is in the third state, the piston rod 31 of the actuator 30 remains in the extension limit position until the pressure in the intake section assembly 200 increases again to the point that the axial force on the intake section assembly 200 exceeds a predetermined value, at which point the controller can control the actuator 30 to retract the piston rod 31 to the initial state.

[0085] When the axial force on the intake section assembly 200 exceeds the predetermined value again, the front section 10 can move axially relative to the rear section 20 in the B direction again.

[0086] exist Figures 3-5 In the illustrated embodiment, the intake section assembly 200 includes only a front section 10 and a rear section 20. In other embodiments, the intake section assembly 200 may include a front section 10 as a first intake section, a rear section 20 as a second intake section, and may also include other intake sections in front of the front section 10 and / or behind the rear section 20, wherein the connection between the other intake sections and the front section 10 and the rear section 20 may be the above-described, other, or combined connection methods.

[0087] The following is for reference Figures 6A-6C The location and distribution of the front rib holes 152 according to some embodiments of the present invention are described, wherein Figure 6A A front view of the front section 10 of an intake section assembly 200 according to some embodiments of the present invention is shown. Figure 6B The following are some embodiments of the invention. Figure 6A The diagram shows a transverse cross-section taken by the BA-BA line. Figure 6C According to some embodiments of the present invention Figure 6BA magnified view of part BB shown.

[0088] like Figure 6A As shown, in some embodiments, the front section 10 of the intake section assembly 200 may have a first front end 11 and a second front end 13. The second front end 13 may include a front flange 14 and a front neck 15. The front neck 15 may include a plurality of front rib holes 152, each of which extends radially through the front neck 15. The front neck 15 may also include an annular groove 154 for housing a sealing ring 156. The plurality of front rib holes 152 may be located behind the annular groove 154.

[0089] Figure 6B It is along Figure 6A The diagram shows a cross-section of the transverse section cut by the BA-BA line. Figure 6C yes Figure 6B A magnified view of part BB shown. Figure 6B and Figure 6C In the illustrated embodiment, the front neck 15 has six front rib holes 152, each of which may have the same or different circumferential angles. A front spacing 153 is provided between every two adjacent front rib holes 152, each of which may have the same or different circumferential angles. In some embodiments, the six front rib holes 152 may be evenly distributed circumferentially.

[0090] In some embodiments, the front neck 15 may have other numbers of front rib holes 152 and front spacers 153. In some embodiments, the circumferential angle of the front rib holes 152 may be greater than, equal to or less than the circumferential angle of the front spacers 153. In some embodiments, the sum of the circumferential angles of all the front rib holes 152 may be greater than the sum of the circumferential angles of all the front spacers 153.

[0091] The following is for reference Figures 7A-7C The location and distribution of the rear rib holes 212 according to some embodiments of the present invention are described, wherein Figure 7A A front view of the rear section 20 of the intake section assembly 200 according to some embodiments of the present invention is shown. Figure 7B The following are some embodiments of the invention. Figure 7A The diagram shows a cross-sectional view of the CB-CB line. Figure 7C Some embodiments of the present invention are shown. Figure 7B A magnified view of the CC section shown.

[0092] like Figure 7AAs shown, in some embodiments, the rear section 20 of the intake section assembly 200 may have a rear section first end 21 and a rear section second end 23. The rear section first end 21 may include a plurality of rear section rib holes 212, each of which may radially pass through the rear section first end 21. In some embodiments, the rear section first end 21 may be sleeved outside the front section neck 15. In other embodiments, the rear section first end 21 may be sleeved inside the front section neck 15.

[0093] Figure 7B It is along Figure 7A The diagram shows a cross-sectional view of the CB-CB line. Figure 7C yes Figure 7B A magnified view of the CC portion shown. Figure 7B and Figure 7C In the illustrated embodiment, the first end 21 of the rear section has six rear section rib holes 212, each of which may have the same or different circumferential angles. A rear section spacing 213 is provided between every two adjacent rear section rib holes 212, each of which may have the same or different circumferential angles. In some embodiments, the six rear section rib holes 212 may be evenly distributed circumferentially.

[0094] In some embodiments, the first end 21 of the rear section may have other numbers of rear section rib holes 212 and rear section spacings 213. In some embodiments, the circumferential angle of the rear section rib holes 212 may be greater than, equal to or less than the circumferential angle of the rear section spacings 213. In some embodiments, the sum of the circumferential angles of all the rear section rib holes 212 may be greater than the sum of the circumferential angles of all the rear section spacings 213.

[0095] The number of rear rib holes 212 at the first end 21 of the rear section may be the same as or different from the number of front rib holes 152.

[0096] In some embodiments, when the intake section assembly 200 is in the second state, each front rib hole 152 is fully aligned with the corresponding rear rib hole 212 to form an air passage for high-pressure gas to be discharged from the interior of the intake section assembly 200. In other embodiments, when the intake section assembly 200 is in the second state, each front rib hole 152 is at least partially aligned with the corresponding rear rib hole 212 to form an air passage for high-pressure gas to be discharged from the interior of the intake section assembly 200.

[0097] II. Pressure Control

[0098] The following is for reference Figure 8A - Figure 8B A pressure control system for an intake section assembly 200 is described according to some embodiments of the present invention.

[0099] In some embodiments, such as Figure 8AAs shown, the pressure control system 300 for the intake section assembly 200 of the present invention may include at least one actuator 30, a pressure sensor 40, and a controller 50. The pressure sensor 40 may be disposed at the airflow inlet of the test specimen for monitoring the pressure within the intake section assembly 200. The controller 50 is communicatively connected to the pressure sensor 40 and at least one actuator 30. When the pressure sensor 40 detects that the pressure within the intake section assembly 200 has decreased to equal to or less than a predetermined pressure threshold due to exhaust through the rib holes, the controller 50 activates at least one actuator 30, causing the piston rod 31 of the actuator 30 to extend from the contraction limit position to the extension limit position. The extension of the piston rod 31 pushes the front section 10 axially from a second relative position (i.e., the position where the front section rib hole 152 and the rear section rib hole 212 are axially aligned or partially aligned to form an air passage) to a first relative position (i.e., the position where the front section rib hole 152 and the rear section rib hole 212 are axially misaligned and sealed together).

[0100] In other embodiments, such as Figure 8B As shown, the pressure control system 400 for the intake section assembly 200 of the present invention may include at least one actuator 30, a first pressure sensor 42, a second pressure sensor 44, and a controller 50. The first pressure sensor 42 may be disposed at the airflow inlet of the test piece to monitor a first pressure within the intake section assembly 200. The second pressure sensor 44 may be disposed at a predetermined position on the test piece to monitor a second pressure within the test piece. The controller 50 is communicatively connected to the first pressure sensor 42, the second pressure sensor 44, and at least one actuator 30. Based on the monitoring results of the first pressure sensor 42 and the first pressure sensor 44, the controller 50 calculates the internal and external pressure difference of the intake section assembly 200. When the internal and external pressure difference of the intake section assembly 200 decreases to equal to or less than a predetermined pressure difference threshold after exhaust through the rib holes, the controller 50 activates at least one actuator 30, causing the piston rod 31 of the actuator 30 to extend from the contraction limit position to the extension limit position. The extension of piston rod 31 can push the front section 10 from the second relative position (i.e., the position where the front section rib hole 152 and the rear section rib hole 212 are axially aligned or partially aligned to form an air passage) to the first relative position (i.e., the position where the front section rib hole 152 and the rear section rib hole 212 are axially misaligned and sealed together).

[0101] Further references are provided below. Figures 9A-9B The pressure control methods 500 and 600 for an intake section assembly 200 according to some embodiments of the present invention are described.

[0102] In some embodiments, such as Figure 9AAs shown, the pressure control process 500 of the intake section assembly 200 of the present invention begins in the first state of the intake section assembly 200. When the intake section assembly is in the first state, the piston rod 31 is in the initial state, at which time the front end face 142 of the front flange 14 is located behind the piston rod 31 of the actuator cylinder 30 and away from the movable end face 32 of the piston rod 31 by a predetermined distance.

[0103] In step 502, pressure sensor 40 monitors the pressure within the intake section assembly 200. In step 504, when the pressure within the intake section assembly 200 rises to equal to or greater than a first pressure threshold, the front section 10 of the intake section assembly 200 moves axially relative to the rear section 20 from a first relative position to a second relative position under the action of an axial force. The first relative position is the position where the front section rib hole 152 and the rear section rib hole 212 are axially misaligned and sealed together, and the second relative position is the position where the front section rib hole 152 and the rear section rib hole 212 are axially aligned and form an air passage. The axial movement of the front section 10 includes the front flange 14's flange tip face 142 moving axially toward the movable end face 32 of the piston rod 31, and further compressing the piston rod 31 after abutting against the movable end face 32 of the piston rod 31 until the piston rod 31 is compressed to its contraction limit position. When the piston rod 31 is compressed to its contraction limit position, the front section rib hole 152 and the rear section rib hole 212 are at least partially axially aligned and form an air passage.

[0104] In step 506, the high-pressure airflow in the intake section assembly 200 is discharged from the intake section assembly 200 through the air passage.

[0105] In step 508, in response to the pressure within the intake section assembly 200 detected by the pressure sensor 40 decreasing to be equal to or less than a second pressure threshold, the controller 50 controls at least one actuator 30 to extend the piston rod 31 from its contraction limit position to its extension limit position. The extension of the piston rod 31 causes the front section 10 to move axially from a second relative position to a first relative position.

[0106] In step 510, the controller 50 controls at least one actuator 30 to restore the piston rod 31 from the extension limit position to the initial position, wherein when the piston rod 31 is in the initial position, the front flange face 142 of the front flange 14 is located behind the piston rod 31 of the actuator 30 and away from the movable end face 32 of the piston rod 31 by a predetermined distance.

[0107] Process 500 returns to step 504.

[0108] In other embodiments, such as Figure 9BAs shown, the pressure control process 600 of the intake section assembly 200 of the present invention begins in the first state of the intake section assembly 200. When the intake section assembly 200 is in the first state, the piston rod 31 is in the initial state, at which time the front end face 142 of the front flange 14 is located behind the piston rod 31 of the actuator cylinder 30 and away from the movable end face 32 of the piston rod 31 by a predetermined distance.

[0109] In step 602, the first pressure sensor 32 monitors the first pressure within the intake section assembly 200, and the second pressure sensor 32 monitors the second pressure within the test piece.

[0110] In step 604, when the pressure difference between the first pressure in the intake section assembly 200 and the second pressure in the test piece rises to be equal to or greater than the first pressure difference threshold, the front section 10 of the intake section assembly 200 moves axially relative to the rear section 20 from a first relative position to a second relative position under the action of axial force. The first relative position is the position where the front section rib hole 152 and the rear section rib hole 212 are axially misaligned and sealed together. The second relative position is the position where the front section rib hole 152 and the rear section rib hole 212 are axially aligned and form an air passage. The axial movement of the front section 10 includes the front flange 14's flange tip face 142 moving axially toward the movable end face 32 of the piston rod 31, and further compressing the piston rod 31 after abutting against the movable end face 32 of the piston rod 31 until the piston rod 31 reaches its compression limit position. When the piston rod 31 reaches its compression limit position, the front section rib hole 152 and the rear section rib hole 212 are at least partially axially aligned and form an air passage.

[0111] In step 606, the high-pressure airflow in the intake section assembly 200 is discharged from the intake section assembly 200 through the air passage.

[0112] In step 608, in response to a decrease in the pressure difference between the first pressure within the intake section assembly 200 and the second pressure within the test piece to a value equal to or less than the second pressure difference threshold, the controller 50 controls at least one actuator 30 to extend the piston rod 31 from its contraction limit position to its extension limit position. The extension of the piston rod 31 causes the front section 10 to move axially from the second relative position to the first relative position.

[0113] In step 610, the controller 50 controls at least one actuator 30 to restore the piston rod 31 from the extension limit position to the initial position, wherein when the piston rod 31 is in the initial position, the flange front end face 142 of the front flange 14 is located behind the piston rod 31 of the actuator 30 and away from the movable end face 32 of the piston rod 31 by a predetermined distance.

[0114] Process 600 returns to step 604.

[0115] exist Figure 9A and Figure 9BIn one embodiment, when the piston rod 31 is in its initial position, the front flange face 142 of the front flange 14 is located behind the piston rod 31 of the actuating cylinder 30 and away from the movable end face 32 of the piston rod 31 by a predetermined distance. In other embodiments, the initial position of the piston rod 31 is its elongation limit position.

[0116] The above steps are exemplary and not intended to be limiting. Those skilled in the art may add one or more steps, delete one or more of the above steps, combine or replace one or more of the above steps, or adjust the order of one or more of the above steps or perform them in parallel as needed.

[0117] Certain portions of the embodiments of this disclosure can be provided as a computer program product, which may include a computer-readable medium having computer program instructions stored thereon, the computer program instructions being used to program a computer (or other electronic device) to be executed by one or more processors to perform processes according to certain embodiments. The computer-readable medium may include, but is not limited to, a magnetic disk, an optical disk, a read-only memory (ROM), a random access memory (RAM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic card or optical card, flash memory, or other types of computer-readable media suitable for storing electronic instructions. Furthermore, the embodiments can also be downloaded as a computer program product, wherein the program can be transferred from a remote computer to a requesting computer. In some embodiments, a non-transient computer-readable storage medium has data stored thereon representing a sequence of instructions that, when executed by a processor, cause the processor to perform certain operations, for example, in combination with the above. Figure 9A and Figure 9B One or more steps of methods 500 and 600 are described.

[0118] Although the invention has been described with reference to preferred embodiments of this disclosure, it is not intended to be limited thereto, but rather to be limited only by the scope set forth in the appended claims. Those skilled in the art will understand that various modifications and changes may be made to the embodiments described herein without departing from the broader spirit and scope of the invention as set forth in the appended claims.

Claims

1. An air inlet section assembly comprising: a first air inlet section; and a second air inlet section, wherein the first air inlet section and the second air inlet section are both hollow structures open at both ends, the first air inlet section is axially movable relative to the second air inlet section, the first air inlet section has a first relative position and a second relative position relative to the second air inlet section, when the first air inlet section is at the first relative position relative to the second air inlet section, the first air inlet section sealingly abuts the second air inlet section, when the first air inlet section is at the second relative position relative to the second air inlet section, the air inlet section assembly has a radial air passage through the abutted portion of the first air inlet section and the second air inlet section for air communication inside and outside the air inlet section assembly, and the first air inlet section is configured to be axially moved from the second relative position to the first relative position under the action of at least one actuator. at least one of the first air inlet section and the second air inlet section has a circumferentially extending rib hole, when the first air inlet section is at the second relative position relative to the second air inlet section, the rib hole constitutes at least a part of the radial air passage.

2. The inlet section assembly of claim 1, wherein, the first air inlet section and the second air inlet section each has at least one circumferentially extending rib hole, when the first air inlet section is at the second relative position relative to the second air inlet section, the at least one rib hole of the first air inlet section at least partially aligns with the corresponding rib hole of the second air inlet section.

3. The inlet section assembly of claim 2, wherein, the first air inlet section has a plurality of circumferentially extending first rib holes, the plurality of circumferentially extending first rib holes are located at the same axial position of the first air inlet section, 4. The inlet section assembly of claim 3, wherein, the second air inlet section has a plurality of circumferentially extending second rib holes, the plurality of circumferentially extending second rib holes are located at the same axial position of the second air inlet section, and when the first air inlet section is at the second relative position relative to the second air inlet section, each first rib hole of the first air inlet section at least partially aligns with the corresponding second rib hole of the second air inlet section. the plurality of circumferentially extending first rib holes are circumferentially uniformly distributed on the first air inlet section, and the plurality of circumferentially extending second rib holes are circumferentially uniformly distributed on the second air inlet section.

5. The inlet section assembly of claim 4, wherein, a circumferential angle of the first rib holes on the first air inlet section is greater than a circumferential angle of the interval between adjacent first rib holes, and a circumferential angle of the second rib holes on the second air inlet section is greater than a circumferential angle of the interval between adjacent second rib holes.

6. The inlet section assembly of claim 5, wherein, a sum of the circumferential angles of all the first rib holes on the first air inlet section is greater than a sum of the circumferential angles of the intervals between all adjacent first rib holes, and a sum of the circumferential angles of all the second rib holes on the second air inlet section is greater than a sum of the circumferential angles of the intervals between all adjacent second rib holes.

7. The inlet section assembly of claim 5, wherein, the air inlet section assembly further comprises a sealing ring, 8. The inlet section assembly of any of claims 4-6, wherein, the first air inlet section has a circumferential ring groove for accommodating the sealing ring, ​ When the first air inlet segment is in the first relative position with respect to the second air inlet segment, the sealing ring is located between the first rib hole on the first air inlet segment and the second rib hole on the second air inlet segment.

9. The air inlet segment assembly of claim 1, wherein, an outer surface of the first air inlet segment has at least one flange, the at least one actuator is disposed at a predetermined position adjacent to the first air inlet segment, a piston of the at least one actuator has a first limit position and a second limit position, when the first air inlet segment is axially moved from the first relative position to the second relative position with respect to the second air inlet segment, the first air inlet segment pushes the piston of the at least one actuator to compress to the second limit position via the at least one flange, the at least one actuator is configured to push the at least one flange by elongating the piston to the first limit position, such that the first air inlet segment is axially moved from the second relative position to the first relative position.

10. The inlet section assembly of claim 1, wherein, an inner diameter of a first port of the first air inlet segment is smaller than an inner diameter of a second port of the first air inlet segment, the second port of the first air inlet segment is used to socket a first port of the second air inlet segment, and a second port of the second air inlet segment is fixed.

11. The inlet section assembly of claim 10, wherein, a cross section of the first air inlet segment along an axial direction is substantially frustoconical.

12. The inlet section assembly of claim 1, wherein, the air inlet segment assembly is an air inlet segment for a compressor test bed.

13. A pressure control system for the air inlet segment assembly of any one of claims 1-12, the pressure control system comprising: a first pressure sensor configured to monitor a first pressure within the air inlet segment assembly; a controller communicatively coupled to the first pressure sensor and the at least one actuator, the controller configured to control the at least one actuator to axially move the first air inlet segment from the second relative position to the first relative position in response to the monitored first pressure within the air inlet segment assembly decreasing to be equal to or less than a pressure threshold.

14. The pressure control system of claim 13, wherein, the pressure control system further comprises a second pressure sensor configured to monitor a second pressure outside the air inlet segment assembly, and the controller is configured to control the at least one actuator to axially move the first air inlet segment from the second relative position to the first relative position in response to a difference between the monitored first pressure and the monitored second pressure decreasing to be equal to or less than a pressure difference threshold.

15. The pressure control system of claim 13 or 14, wherein, further comprising: the at least one actuator disposed at a predetermined position adjacent to the first air inlet segment, a piston of the at least one actuator has a first limit position and a second limit position, when the piston is at the first limit position, the first air inlet segment is in the first relative position with respect to the second air inlet segment, and when the piston is at the second limit position, the first air inlet segment is in the second relative position with respect to the second air inlet segment.

16. A pressure control method for the inlet section assembly of any one of claims 1-12, comprising: monitoring a first pressure within the inlet section assembly; and in response to the monitored first pressure within the inlet section assembly decreasing to equal or less than a second pressure threshold, controlling the at least one actuator to move the first inlet section axially from the second relative position to the first relative position.

17. The pressure control method of claim 16, further comprising: when the first pressure increases to equal or greater than a first pressure threshold, the first inlet section moves axially relative to the second inlet section from the first relative position to the second relative position under the influence of the internal airflow.

18. The pressure control method of claim 17, the first pressure threshold is in the range of 1.2-1.5 times standard atmospheric pressure, the second pressure threshold is in the range of 1.0-1.1 times standard atmospheric pressure, and the first pressure threshold is greater than the second pressure threshold.

19. The pressure control method of claim 16, further comprising: monitoring a second pressure outside the inlet section; and in response to a difference between the monitored first pressure and the monitored second pressure decreasing to equal or less than a second pressure difference threshold, controlling the actuator to move the first inlet section axially from the second relative position to the first relative position.

20. The pressure control method of claim 19, further comprising: when the difference between the first pressure and the second pressure increases to equal or greater than a first pressure difference threshold, the first inlet section moves axially relative to the second inlet section from the first relative position to the second relative position under the influence of the internal airflow.

21. The pressure control method of claim 20, the first pressure difference threshold is in the range of 0.2-0.5 times standard atmospheric pressure, the second pressure difference threshold is in the range of 0-0.1 times standard atmospheric pressure, and the first pressure difference threshold is greater than the second pressure difference threshold.

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