A sealing mechanism and a cascade flow field measurement device

Abstract

The application discloses a sealing mechanism and a cascade flow field measuring device, and the sealing mechanism comprises a shell, a sealing assembly and a roller assembly. The shell is used for being assembled on a cascade experiment table. The sealing assembly is arranged on the shell and is used for sealing a cascade measuring groove. The sealing assembly comprises a plurality of sealing plates which are sequentially rotationally connected. At least one sealing plate is used for arranging a probe structure. The roller assembly is provided with two roller assemblies. One roller assembly is arranged at one end of the sealing assembly, and the other roller assembly is arranged at the other end of the sealing assembly. Each roller assembly is used for winding or unwinding the sealing assembly to pull the sealing assembly to move. When the probe structure moves with the sealing assembly, the sealing assembly also seals the cascade measuring groove well. The embodiment of the application can reduce the air leakage problem of the cascade measuring groove and ensure the flow quality of the measured flow field and the measurement effect of the probe structure.

Description

Technical Field

[0001] This application relates to the technical field of flow field measurement, and more particularly to a sealing mechanism and a blade cascade flow field measurement device. Background Technology

[0002] Blade cascade experiments are a classic simplified model experimental method for turbomachinery, which can be used to evaluate the performance of blade profiles, flow field characteristics and mechanism studies in a low cost and convenient way.

[0003] In related technologies, the flow field measurement equipment for cascades includes a cascade test bench. The test bench has a cascade mounting slot and a cascade measurement slot. The mounting slot is used to install the cascade structure, and the measurement slot is used to install a measuring device with a probe structure. The measuring device measures the flow field through the probe structure. However, when measuring the flow field, the probe structure needs to slide along the cascade measurement slot, which prevents the slot from being effectively sealed. With increasing test flow velocity, especially under conditions of high subsonic (Ma>0.8), transonic (Ma≈1.0), and supersonic (Ma>1.0) flow, the cascade measurement slot disrupts the flow field and causes gas leakage, making it impossible for the probe structure to accurately measure the flow field. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a sealing mechanism that can reduce air leakage in the blade cascade measuring slot and ensure measurement accuracy.

[0005] The present invention also proposes a flow field measurement device for a blade cascade having the above-mentioned sealing mechanism.

[0006] The first aspect of this application provides a sealing mechanism applied to the blade cascade measuring groove of a blade cascade test bench. The sealing mechanism includes a housing, a sealing assembly, and a roller assembly, wherein:

[0007] A housing for assembly onto the blade cascade experimental stage;

[0008] A sealing assembly is disposed in the housing for sealing the blade cascade measurement groove. The sealing assembly includes multiple sealing plates that are rotatably connected in sequence, and at least one of the sealing plates is used to set a probe structure.

[0009] Two roller winding assemblies are provided. One roller winding assembly is located at one end of the sealing assembly, and the other roller winding assembly is located at the other end of the sealing assembly. Each roller winding assembly is used for winding or unwinding the sealing assembly to pull the sealing assembly to move.

[0010] According to some embodiments of the present invention, the sealing mechanism further includes a mounting assembly slidably disposed on the housing and used to fix the probe structure;

[0011] The sealing mechanism further includes a flexible pulling member, which is connected between the two roller assemblies and to the mounting assembly. Each roller assembly is used for winding or unwinding the flexible pulling member to pull the mounting assembly to move; and / or, the mounting assembly is connected to the sealing assembly to move synchronously with the sealing assembly.

[0012] According to some embodiments of the present invention, the sealing mechanism further includes a bellows connected between the sealing plate and the mounting assembly, and used to be sleeved on the outside of the probe structure.

[0013] According to some embodiments of the present invention, the mounting assembly includes a base, a mounting seat, and a drive module, wherein:

[0014] The base is slidably disposed on the housing and connected to the flexible pull member and / or sealing assembly;

[0015] The mounting base is movably disposed on the base for fixing the probe structure;

[0016] The drive module is disposed on the base and is used to drive the mounting base to move. The direction of movement of the mounting base is set to the length direction of the probe structure.

[0017] According to some embodiments of the present invention, the drive module includes a drive component, a lead screw, and a connecting component, wherein,

[0018] The lead screw is rotatably mounted on the base;

[0019] The connector is slidably disposed on the base and threadedly connected to the lead screw, and the mounting base is fixedly connected to the connector;

[0020] The driving component is used to drive the lead screw to rotate.

[0021] According to some embodiments of the present invention, the sealing plate is detachably connected to a lower mounting plate, and the lower mounting plate has a lower mounting hole for the probe structure to pass through;

[0022] The mounting assembly is detachably connected to an upper mounting plate, which has an upper mounting hole for the probe structure to pass through and be fixed.

[0023] According to some embodiments of the present invention, the roll assembly includes a take-up shaft, a take-up roller, and a power component. The take-up shaft has a first transmission section and a second transmission section. The side of the first transmission section has a connecting portion connected to the flexible pulling component. The take-up roller is sleeved on the second transmission section and is circumferentially fixed to the second transmission section. The take-up roller is used for the take-up or unwinding of the sealing assembly.

[0024] According to some embodiments of the present invention, the housing includes a first side shell and a second side shell. The first side shell is used to seal and connect to one side of the blade cascade measuring groove. A first guide groove is provided on the inner side of the first side shell. The second side shell is used to seal and connect to the other side of the blade cascade measuring groove. A second guide groove is provided on the inner side of the second side shell. The first guide groove and the second guide groove are arranged opposite to each other.

[0025] One side of the sealing component is slidably disposed in the first guide groove, and the other side is slidably disposed in the second guide groove.

[0026] According to some embodiments of the present invention, the sealing plate includes a plate, a first connecting portion and a second connecting portion, the plate being connected between the first connecting portion and the second connecting portion, the first connecting portion having a communicating rotating hole and a strip-shaped notch, the plate of the adjacent sealing plate passing through the strip-shaped notch, and the second connecting portion being rotatably disposed in the rotating hole.

[0027] A second aspect of this application provides a flow field measurement device for a cascade, comprising:

[0028] frame;

[0029] A blade cascade test bench is mounted on the frame, and the blade cascade test bench is provided with a blade cascade measurement slot.

[0030] The aforementioned sealing mechanism, wherein the housing is assembled and connected to the blade cascade test bench, so that the sealing mechanism seals the blade cascade measuring groove;

[0031] A probe mechanism, including a probe structure disposed on the sealing assembly.

[0032] As can be seen from the above technical solutions, the embodiments of this application have the following advantages:

[0033] 1. As the probe structure moves with the sealing assembly, the sealing assembly also effectively seals the blade cascade measurement slot, reducing air leakage and ensuring the flow quality of the measured flow field. Furthermore, due to the sufficiently high rigidity of the sealing assembly, it can maintain a good seal on the blade cascade measurement slot even under large flow field conditions, ensuring the measurement performance of the probe structure.

[0034] 2. Because the roller assembly can wind up the sealing assembly, the sealing mechanism has a compact structure and small overall size, allowing for flexible assembly into the blade cascade measuring slot. Furthermore, while ensuring good sealing of the blade cascade measuring slot, the sealing assembly will not interfere with the blade cascade test bench during movement.

[0035] 3. The combination of the two embodiments of this application enables the present invention to have both the functions of sealing the blade cascade measurement slot and measuring the flow field. While improving the quality of the flow field of the blade cascade, the present invention can also load a measurement probe to perform flow field measurement at the exit surface of the blade cascade. Attached Figure Description

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0037] Figure 1 This is a schematic diagram of the structure of the blade cascade experimental stage according to an embodiment of the present invention;

[0038] Figure 2 This is a schematic diagram of the sealing mechanism according to an embodiment of the present invention;

[0039] Figure 3 This is a partial exploded structural diagram of the sealing mechanism according to an embodiment of the present invention;

[0040] Figure 4 This is a schematic diagram of another part of the sealing mechanism according to an embodiment of the present invention;

[0041] Figure 5 This is an exploded view of the installation components according to an embodiment of the present invention;

[0042] Figure 6 This is an exploded structural diagram of the roller assembly according to an embodiment of the present invention;

[0043] Figure 7 This is a schematic diagram of the structure of the first side shell according to an embodiment of the present invention;

[0044] Figure 8 This is a schematic diagram of the structure of the second side shell according to an embodiment of the present invention;

[0045] Figure 9 This is a schematic diagram of the sealing component according to an embodiment of the present invention.

[0046] Reference numerals: 10, sealing mechanism; 100, blade cascade test platform; 110, blade cascade mounting groove; 120, blade cascade measuring groove; 200, housing; 210, first side shell; 211, first guide member; 2111, first guide groove; 212, box body; 220, second side shell; 221, second guide member; 2211, second guide groove; 222, end cap; 300, sealing assembly; 310, sealing plate; 311, plate; 3111, first strip-shaped opening; 312, first connecting part; 3121, rotating hole; 3122, strip-shaped notch; 31 3. Second connecting part; 320. Lower mounting plate; 321. Lower mounting hole; 400. Roller assembly; 410. Take-up shaft; 411. First transmission section; 4111. Connecting part; 412. Second transmission section; 420. Take-up roller; 430. Power component; 440. Flexible pulling component; 500. Mounting assembly; 510. Base; 520. Mounting seat; 521. Second strip-shaped opening; 530. Drive module; 531. Drive component; 532. Lead screw; 533. Connecting component; 540. Upper mounting plate; 541. Upper mounting hole; 550. Corrugated pipe. Detailed Implementation

[0047] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0048] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, up, down, etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0049] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0050] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0051] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] According to a first aspect of the present invention, a sealing mechanism 10 is disclosed, with reference to Figure 1 and Figure 2 The sealing mechanism 10 is applied to the blade cascade measurement slot 120 of the blade cascade experimental stage 100, and the sealing mechanism 10 seals the opening of the blade cascade measurement slot 120. When the probe structure is measuring the flow field, the sealing structure reduces the leakage of gas to the blade cascade measurement slot 120, thereby ensuring that the probe structure can accurately measure the flow field.

[0053] The sealing structure includes a housing 200, a sealing assembly 300, and a roller assembly 400. The housing 200 is used to assemble on the blade cascade test bench 100. The sealing assembly 300 is disposed on the housing 200 and is used to seal the blade cascade measuring groove 120. The sealing assembly 300 includes multiple sealing plates 310, which are rotatably connected in sequence. At least one sealing plate 310 is used to set a probe structure. There are two roller assemblies 400. One roller assembly 400 is disposed at one end of the sealing assembly 300, and the other roller assembly 400 is disposed at the other end of the sealing assembly 300. Each roller assembly 400 is used to wind up or unwind the sealing assembly 300 to pull the sealing assembly 300 to move.

[0054] Specifically, the sealing mechanism 10 is mounted at the position of the blade cascade measuring groove 120, and the sealing assembly 300 is arranged along the Y-axis direction in the blade cascade measuring groove 120, that is, along the length direction of the blade cascade measuring groove 120. The sealing assembly 300 seals the blade cascade measuring groove 120, wherein the probe structure is mounted on the sealing plate 310 of the sealing assembly 300. When the upper roller assembly 400 winds up the sealing assembly 300, the lower roller assembly 400 unwinds the sealing assembly 300, thus the sealing plate 310 of the sealing assembly 300 drives the probe structure to move upward; conversely, when the lower roller assembly 400 winds up the sealing assembly 300, the upper roller assembly 400 unwinds the sealing assembly 300, thus the sealing plate 310 of the sealing assembly 300 drives the probe structure to move downward. During its movement along the Y-axis, the probe structure not only performs fixed-point measurements on certain points in the flow field, but also performs sweep measurements on a certain plane, thereby completing the measurement tasks required for blade cascade research.

[0055] In summary, as the probe structure moves with the sealing assembly 300, the sealing assembly 300 also effectively seals the blade cascade measurement slot 120, reducing air leakage and thus ensuring the flow quality of the measured flow field. Furthermore, due to the sufficiently high rigidity of the sealing assembly 300, it can maintain a good seal on the blade cascade measurement slot 120 even under a large flow field, ensuring the measurement performance of the probe structure.

[0056] Because the roller winding assembly 400 can wind up the sealing assembly 300, the sealing mechanism 10 has a compact structure and small overall size, allowing it to be flexibly assembled into the blade cascade measuring groove 120. Furthermore, while ensuring good sealing of the blade cascade measuring groove 120, the sealing assembly 300 will not interfere with the blade cascade test bench 100 during movement.

[0057] Furthermore, the combination of the two aspects of the application allows the present invention to have both the function of sealing the blade cascade measurement groove 120 and the function of flow field measurement. While improving the quality of the flow field of the blade cascade, the present invention can also load a measurement probe to perform flow field measurement at the blade cascade exit surface.

[0058] In some embodiments, refer to Figure 3 and Figure 4 The sealing mechanism 10 also includes a mounting component 500. The bottom of the mounting component 500 has a T-shaped slider, and the front side of the housing 200 has a T-shaped sliding groove along the Y-axis. The mounting component 500 is slidably set in the sliding groove through the T-shaped slider, thereby slidably connecting to the housing 200. The tail of the probe structure is connected to the sealing plate 310, and the head of the probe structure is fixedly connected to the probe structure. It can be seen that the mounting component 500 further ensures the stability of the probe structure.

[0059] To enable the sealing assembly 300 and the mounting assembly 500 to move upward or downward simultaneously, the sealing mechanism 10 further includes a flexible pulling member 440. The flexible pulling member 440 can be one or two drive belts. If the flexible pulling member 440 is a single drive belt, it is connected between two roller assemblies 400, and the mounting assembly 500 is connected to the flexible pulling member 440. In this way, the two roller assemblies 400 cooperate to control the movement of the flexible pulling member 440, thereby driving the mounting assembly 500... The component 500 moves along the Y-axis, thereby driving the probe structure to move along the Y-axis. If the flexible pulling component 440 consists of two transmission belts, one flexible pulling component 440 is connected between the mounting component 500 and a roller assembly 400, and the other flexible pulling component 440 is connected between the mounting component 500 and another roller assembly 400. In this way, the two roller assemblies 400, through the cooperation of the flexible pulling components 440, pull the mounting component 500 to move along the Y-axis, thereby driving the probe structure to move along the Y-axis.

[0060] As can be seen from the above, the roller assembly 400 simultaneously drives the sealing assembly 300 and the flexible pulling member 440 to move along the Y-axis. The sealing plate 310 and the mounting assembly 500 simultaneously drive the probe structure to move along the Y-axis, thereby enabling the probe structure to perform sweep measurement on a certain plane. The mounting assembly 500 stably fixes the probe structure, maintaining it in a certain posture to prevent swaying under airflow. The flexible pulling member 440 has sufficient pulling force to stably pull the mounting assembly 500 along the Y-axis, thus ensuring stable movement of the probe structure.

[0061] Instead of the flexible pulling member 440 driving the installation assembly 500, in some embodiments, the installation assembly 500 is fixedly connected to the sealing plate 310 of the sealing assembly 300. Specifically, the two roller assemblies 400 cooperate to pull the sealing assembly 300, causing it to move along the Y-axis, which in turn drives the installation assembly 500. Furthermore, since the probe structure is connected to the sealing plate 310 and the installation assembly 500, the sealing assembly 300 drives the probe structure to move via the installation assembly 500 and directly via the sealing assembly 300.

[0062] Of course, the mounting component 500 is not limited to the above-mentioned method. For example, the mounting component 500 can be mounted on the flexible pull member 440 and also on the sealing plate 310.

[0063] In some embodiments, refer to Figure 4 and Figure 5 The mounting assembly 500 includes a base 510, a mounting seat 520, and a drive module 530. The base 510 has a slider at its bottom, and the base 510 is slidably mounted on the housing 200 along the Y-axis via the slider. A flexible pull member 440 and / or a sealing assembly 300 are connected to the base 510 to pull the base 510. The mounting seat 520 is arranged along the X-axis and slidably mounted on the base 510 along the Z-axis. A probe structure is fixed to the mounting seat 520, wherein the length direction of the probe structure is along the Z-axis. The drive module 530 is disposed on the base 510 and is used to drive the mounting seat 520 to move along the Z-axis.

[0064] Furthermore, the drive module 530 includes a lead screw 532, a drive component 531, and a connector 533. The lead screw 532 is fixed to the base 510 along the Z-axis, and the connector 533 is slidably disposed on the base 510 along the Z-axis. The connector 533 is threadedly connected to the lead screw 532. The mounting base 520 is connected to the connector 533, thereby slidingly disposed on the base 510 via the connector 533, and the probe structure is mounted on the mounting base 520. The drive component 531 is a motor, which is disposed on the base 510. The drive shaft of the motor is connected to the lead screw 532 via a coupling or gear assembly, and the motor drives the lead screw 532 to rotate. The specific process is as follows: the drive component 531 drives the lead screw 532 to rotate, the lead screw 532 is threadedly connected to the connector 533, the connector 533 moves along the Z-axis, and the mounting base 520 and the connector 533 move synchronously along the Z-axis. Since the probe structure is slidably mounted on the sealing plate 310, the mounting base 520 moves the probe structure along the Z-axis when it moves.

[0065] Furthermore, to enable the probe structure to be adjusted along the X-axis, in some embodiments, the sealing plate 310 has a first strip-shaped opening 3111 extending along the X-axis. The sealing plate is detachably connected to a lower mounting piece 320 located in the first strip-shaped opening 3111, for example, the lower mounting piece 320 is connected to the sealing plate 310 by screws. The lower mounting piece 320 has a lower mounting hole 321 communicating with the first strip-shaped opening 3111, and the probe structure slides through the lower mounting hole 321. The mounting base 520 has a second strip-shaped opening 521 extending along the X-axis. The mounting base 520 is detachably connected to an upper mounting piece 540 located in the second strip-shaped opening 521, for example, the upper mounting piece 540 is connected to the mounting base 520 by screws. The upper mounting piece 540 has an upper mounting hole 541 communicating with the second strip-shaped opening 521, and the probe structure passes through and is fixed in the upper mounting hole 541.

[0066] When it is necessary to adjust the position of the probe structure along the X-axis, the operator replaces the lower mounting plate 320 and the upper mounting plate 540. The lower mounting hole 321 of the replaced lower mounting plate 320 and the upper mounting hole 541 of the upper mounting plate 540 are adjusted in the X-axis direction, thereby adjusting the probe structure along the X-axis.

[0067] In some embodiments, refer to Figure 3 and Figure 6The roller assembly 400 includes a take-up shaft 410, a take-up roller 420, and a power unit 430. The take-up shaft 410 is disposed along the X-axis in the housing 200 and is rotatably connected to the housing 200. The power unit 430 is a motor, which is connected to the take-up shaft 410 via a coupling or gear assembly, and the motor drives the take-up shaft 410 to rotate. The take-up shaft 410 has a first transmission section 411 and a second transmission section 412. The side of the first transmission section 411 has a connecting portion 4111, and a flexible pulling member 440 is connected to the connecting portion 4111. The circumferential surface of the second transmission section 412 is provided with a first positioning plane extending to the end of the take-up shaft 410, and the inner wall of the take-up roller has a second positioning plane extending to both ends of the take-up roller 420. The take-up roller 420 is sleeved on the outer side of the second transmission section 412, and the first positioning plane and the second positioning plane are fitted together. The take-up roller 420 and the take-up shaft 410 are circumferentially fixed. Therefore, the take-up shaft 410 can drive the take-up roller 420 to rotate, and the take-up roller 420 winds up the sealing assembly 300. Furthermore, the take-up tube 420 and the take-up shaft 410 are easy to install and remove. Specifically, the power component 430 drives the take-up shaft 410 to rotate. The take-up shaft 410, through the rotation of the first transmission section 411, winds up the flexible pulling member 440. Simultaneously, the take-up shaft 410, through the second transmission section 412, drives the take-up roller 420 to rotate, and the take-up roller 420 winds up the sealing assembly 300. In summary, the solution of this application uses a single drive mechanism to complete the movement of the sealing assembly 300 and the flexible pulling member 430, and the structure is relatively simple.

[0068] In some embodiments, refer to Figure 1 , Figure 3 , Figure 7 and Figure 8 The housing 200 includes a first side shell 210 and a second side shell 220. The first side shell 210 is used to seal and connect to one side of the blade cascade measuring groove 120, and the second side shell 220 is used to seal and connect to the other side of the blade cascade measuring groove 120. A first guide groove 2111 is formed on the inner side of the first side shell 210, and a second guide groove 2211 is formed on the inner side of the second side shell 220. The first guide groove 2111 and the second guide groove 2211 are arranged opposite to each other. One edge of the sealing assembly 300 is disposed in the first guide groove 2111, and the other edge is disposed in the second guide groove 2211. When the roller assembly 400 pulls the sealing assembly 300 to move, the sealing assembly 300 moves relative to the first guide groove 2111 and relative to the second guide groove 2211. At this time, the sealing assembly 300 and the housing 200 have a good seal, thereby ensuring that the sealing assembly 300 has a good seal relative to the blade cascade test stage 100, thereby reducing air leakage in the blade cascade measurement groove 120 and ensuring the accuracy of the probe structure measurement.

[0069] Further, the first side shell 210 includes a first guide member 211 and two housings 212. The first guide member 211 is connected between the two housings 212. The inner side of the first guide member 211 is provided with the aforementioned first guide groove 2111. The two ends of the first guide groove 2111 are respectively connected to the housings 212. Each take-up roller 420 is hidden inside the housing 212. The second side shell 220 includes a second guide member 221 and two end caps 222. The second guide member 221 is connected between the two end caps 222. The inner side of the second guide member 221 is provided with the aforementioned second guide groove 2211. The two ends of the second guide groove 2211 are sealed and connected to the end caps 222. Each end cap 222 is used to seal the opening of each housing 212.

[0070] In some embodiments, refer to Figure 2 and Figure 9 The sealing plate 310 includes a plate 311, a first connecting portion 312, and a second connecting portion 313. The plate 311 is connected between the first connecting portion 312 and the second connecting portion 313. The first connecting portion 312 has a through-hole 3121 and a strip-shaped notch 3122. The through-hole 3121 extends to both ends of the connecting portion 312, and the strip-shaped notch 3122 extends through the through-hole 3121 and the side of the first connecting portion 312 away from the plate 311. The plates 311 of adjacent sealing plates 310 pass through the strip-shaped notch 3122, and the second connecting portion 313 is rotatably disposed in the through-hole 3121. With the above-described structure, the sealing assembly 300 is easy to install and disassemble, and provides a good sealing effect between adjacent sealing plates 310, thereby ensuring that the sealing assembly 300 can effectively seal the blade measuring groove 120.

[0071] According to a first aspect of the present invention, a flow field measurement device for a cascade is disclosed, with reference to... Figure 1 and Figure 2 The assembly includes a frame, a blade cascade test platform 100, the aforementioned sealing mechanism 10, and a probe mechanism. The blade cascade test platform 100 is mounted on the frame and has a blade cascade measurement slot 120. The housing 200 is assembled and connected to the blade cascade test platform 100 so that the sealing mechanism 10 seals the blade cascade measurement slot 120. The probe mechanism includes a probe structure, which is mounted on the sealing assembly 300.

[0072] Specifically, the blade cascade to be tested is installed in the blade cascade mounting slot 110 of the blade cascade test bench 100, and the sealing structure is installed in the position of the blade cascade measurement slot 120. The probe structure is installed in the sealing plate 310 of the sealing assembly 300. During blade cascade measurement, the blade cascade test bench 100 generates a flow field flowing along the X-axis. After passing through the blade cascade, the airflow flows to the probe structure, which measures the airflow passing through the blade cascade to determine the characteristics of the blade cascade. Through the sealing assembly 300, even when the probe structure moves along the Y-axis, the sealing assembly 300 can still ensure the sealing of the blade cascade measurement slot 120, thereby reducing air leakage in the blade cascade measurement slot 120 and ensuring that the probe structure can accurately measure the flow field.

[0073] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A sealing mechanism, characterized in that, The blade cascade measuring groove applied to the blade cascade test bench, wherein the sealing mechanism includes a housing, a sealing assembly, and a roller assembly, wherein: A housing for assembly onto the blade cascade experimental stage; A sealing assembly is disposed in the housing for sealing the blade cascade measurement groove. The sealing assembly includes multiple sealing plates that are rotatably connected in sequence, and at least one of the sealing plates is used to set a probe structure. Two roller winding assemblies are provided. One roller winding assembly is located at one end of the sealing assembly, and the other roller winding assembly is located at the other end of the sealing assembly. Each roller winding assembly is used for winding or unwinding the sealing assembly to pull the sealing assembly to move. The sealing mechanism further includes an installation assembly slidably disposed on the housing and used to fix the probe structure; wherein, the sealing mechanism further includes a flexible pulling member connected between the two roller assemblies and connected to the installation assembly, each roller assembly being used for winding or unwinding the flexible pulling member, so as to pull the installation assembly to move through the flexible pulling member; and / or, the installation assembly is connected to the sealing assembly so as to be able to move synchronously with the sealing assembly.

2. The sealing mechanism according to claim 1, characterized in that, The sealing mechanism also includes a bellows, which is connected between the sealing plate and the mounting assembly and is used to be sleeved on the outside of the probe structure.

3. A sealing mechanism according to claim 1, characterized in that, The mounting assembly includes a base, a mounting bracket, and a drive module, wherein: The base is slidably disposed on the housing and connected to the flexible pull member and / or sealing assembly; The mounting base is movably disposed on the base for fixing the probe structure; The drive module is disposed on the base and is used to drive the mounting base to move. The direction of movement of the mounting base is set to the length direction of the probe structure.

4. A sealing mechanism according to claim 3, characterized in that, The drive module includes a drive component, a lead screw, and a connecting component, wherein... The lead screw is rotatably mounted on the base; The connector is slidably disposed on the base and threadedly connected to the lead screw, and the mounting base is fixedly connected to the connector; The driving component is used to drive the lead screw to rotate.

5. A sealing mechanism according to claim 1, characterized in that, The sealing plate is detachably connected to a lower mounting plate, and the lower mounting plate has a lower mounting hole for the probe structure to pass through; The mounting assembly is detachably connected to an upper mounting plate, which has an upper mounting hole for the probe structure to pass through and be fixed.

6. A sealing mechanism according to claim 1, characterized in that, The roll assembly includes a take-up shaft, a take-up roller, and a power component. The take-up shaft has a first transmission section and a second transmission section. The side of the first transmission section has a connecting part that connects to the flexible pulling component. The take-up roller is sleeved on the second transmission section and is circumferentially fixed to the second transmission section. The take-up roller is used for the take-up or unwinding of the sealing assembly.

7. A sealing mechanism according to claim 1, characterized in that, The housing includes a first side shell and a second side shell. The first side shell is used to seal and connect to one side of the blade cascade measuring groove. A first guide groove is provided on the inner side of the first side shell. The second side shell is used to seal and connect to the other side of the blade cascade measuring groove. A second guide groove is provided on the inner side of the second side shell. The first guide groove and the second guide groove are arranged opposite to each other. One side of the sealing component is slidably disposed in the first guide groove, and the other side is slidably disposed in the second guide groove.

8. A sealing mechanism according to claim 1, characterized in that, The sealing plate includes a plate, a first connecting part and a second connecting part. The plate is connected between the first connecting part and the second connecting part. The first connecting part has a through rotating hole and a strip-shaped notch. The plate of the adjacent sealing plate passes through the strip-shaped notch, and the second connecting part is rotatably disposed in the rotating hole.

9. A flow field measurement device for a cascade, characterized in that, include: frame; A blade cascade test bench is mounted on the frame, and the blade cascade test bench is provided with a blade cascade measurement slot. The sealing mechanism according to any one of claims 1 to 8, wherein the housing is assembled and connected to the blade cascade test bench, so that the sealing mechanism seals the blade cascade measuring groove; A probe mechanism, including a probe structure disposed on the sealing assembly.

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