Multi-track disc type pressure pulse generator

Abstract

The invention provides a multi-track disc type pressure pulse generator which comprises a containing bin provided with an air inlet and a plurality of air outlets and a track disc provided with at least one set of annular track belt, the track disc is adjacent to the air outlet side of the containing bin, and through holes penetrating through the track disc are formed in the track belt. The rail belt is divided into a ventilation area and a gas blocking area by the through holes; a multi-sealing structure is arranged between the inner wall, located on the air outlet side, of the containing bin and one side wall of the rail disc. According to the multi-track disc type pressure pulse generator, by controlling the pressure frequency spectrum characteristics of working media at all outlets, simulation of special unsteady flow characteristics under the conditions that a power system operates abnormally and the like is achieved, destructive treatment does not need to be conducted on the whole generator and the whole machine, the needed test period is short, the cost is low, and the test efficiency is high. And long-time multi-frequency full testing can be supported, so that testing requirements are met.

Description

Technical Field

[0001] The present application belongs to the field of equipment manufacturing technology, and in particular relates to a multi-track disc-type pressure pulse generator. Background Art

[0002] In the development and testing of power systems for equipment such as drones and new energy vehicles, it is necessary to evaluate the impact of special unsteady flows on the performance and strength of power machinery under conditions such as abnormal operation of the power system.

[0003] Generally speaking, in the past, such assessments usually required destructive treatment of the entire device or machine, so that the power system could be operated under abnormal conditions and relevant measurements could be performed. Therefore, the test cycle and cost were often relatively high, and it was difficult to accurately simulate the special unsteady flow characteristics under abnormal conditions such as power system operation. Summary of the invention

[0004] In view of this, the present application aims to propose a multi-track disc pressure pulse generator to solve the problems of high test cycle and cost in the power system evaluation link, and difficulty in accurately simulating special unsteady flow characteristics under abnormal power system operation conditions.

[0005] To achieve the above purpose, the technical solution of this application is implemented as follows: The present application provides a multi-track disc type pressure pulse generator, comprising a container having an air inlet and multiple air outlets, and a track disc provided with at least one set of annular track belts, wherein the track disc is adjacent to the air outlet side of the container, and the track belt is provided with a through hole penetrating the track disc, and the through hole divides the track belt into a ventilation area and a gas blocking area; A multiple sealing structure is arranged between the inner wall of the storage compartment located on the air outlet side and a side wall of the rail plate.

[0006] Further, the main structure of the storage bin is a hollow cylinder, and the multiple air outlets are distributed on a single non-rotating surface of the hollow cylinder, and the air inlet is arranged on the other non-rotating surface or the rotating surface. Further, the hollow cylinder is composed of two half bodies connected by flanges, and the two half bodies are assembled to form the storage bin.

[0007] Furthermore, a sealing gasket is installed at the flange connection of the two half bodies.

[0008] Furthermore, the main structure of the rail disc is a disc-shaped solid cylinder, and a single-sided or double-sided rotating shaft is connected to the central position of the disc-shaped solid cylinder, and the rotating shaft is connected to an external drive source; The track is arranged on the disc-shaped solid cylinder, and the through holes arranged on the track are connected with the air inlet and the plurality of air outlets.

[0009] Furthermore, in response to the fact that there are two groups of track belts, the two groups of track belts are concentrically arranged; wherein, one group is arranged at the edge of the track disk, and the other group is arranged around the rotation axis.

[0010] Furthermore, sealing areas are formed between two adjacent track belts, on the outer edge of the track belt of the outermost circle, and on the inner edge of the track belt of the innermost circle, and the inner wall surface of the sealing area cooperates with the inner wall surface of the storage bin to form a labyrinth-type sealing structure.

[0011] Compared with the prior art, the multi-track disc pressure pulse generator described in this application has the following beneficial effects: A multi-track disc pressure pulse generator described in the present application divides the track disc and the storage bin into multiple ring track belts and designs the track disc through holes and the storage bin outlet according to the pressure spectrum requirements. By controlling the pressure spectrum characteristics of the working fluid at each outlet, it can simulate the special unsteady flow characteristics in situations such as abnormal operation of the power system. There is no need to perform destructive treatment on the entire device or machine, and the required test cycle and cost are relatively low, which can support long-term and multi-frequency sufficient testing, thereby meeting the testing requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0013] Figure 1 This is a schematic structural diagram of a multi-track disc pressure pulse generator described in an embodiment of the present application.

[0014] Description of reference numerals: 1-warehouse; 101-air inlet; 102-air outlet; 2-rail plate; 3-through hole; 4-rotating axis; 5-labyrinth sealing structure. DETAILED DESCRIPTION

[0015] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0016] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0017] See also Figure 1 As shown, this embodiment provides a multi-track disc type pressure pulse generator, comprising a container 1 having an air inlet 101 and multiple air outlets 102, and a track disc 2 provided with at least one set of annular track belts, the track disc 2 is adjacent to the air outlet 102 side of the container 1, and a through hole 3 penetrating the track disc 2 is opened on the track belt, and the through hole 3 divides the track belt into a ventilation area and a gas blocking area; A multiple sealing structure is provided between the inner wall of the container 1 on the side of the air outlet 102 and a side wall of the rail plate 2 .

[0018] Specifically, in this embodiment, the pulse generator container 1 is provided with an inlet and multiple outlets based on the pulse generating scheme, the pulse generator track plate 2 is provided with at least one set of track belts based on the pressure frequency requirements, and through holes 3 designed based on the pressure amplitude-frequency characteristics are provided on the corresponding track belts, and a sealing mechanism is provided between the container 1 and the track plate 2 to suppress leakage between the track belts or outside the track belts. By rotating the track plate 2 relative to the container 1, the actual flow area of ​​each outlet is periodically adjusted, thereby realizing the spectral composite output of the outlet pressure.

[0019] It should be noted that the track belt described in this embodiment is a space area with different diameters on the track plate 2, and different through holes are arranged in the space area to divide it into a ventilation area and a gas blocking area.

[0020] The multi-track disc 2 pressure pulse generator described in this embodiment divides the track disc 2 and the storage tank 1 into multi-ring track belts and designs the through holes 3 of the track disc 2 and the storage tank 1 outlet according to the pressure spectrum requirements. By controlling the pressure spectrum characteristics of the working fluid at each outlet, it is possible to simulate special unsteady flow characteristics in situations such as abnormal operation of the power system. There is no need to perform destructive treatment on the entire device or machine, and the required test cycle and cost are relatively low, which can support long-term and multi-frequency sufficient testing, thereby meeting the testing requirements.

[0021] In some embodiments, the main structure of the storage bin 1 is a hollow cylinder, and the plurality of air outlets 102 are distributed on a single non-rotating surface of the hollow cylinder, and the air inlet 101 is arranged on the other non-rotating surface or the rotating surface; The hollow cylinder is composed of two halves connected by flanges, and the two halves are assembled to form a container 1; A sealing gasket is installed at the flange connection of the two halves to form a closed space inside the container 1 and provide a sealed environment for power system simulation.

[0022] Specifically, in the present embodiment, the storage bin 1 is formed by cooperation of two half bodies with grooves therein, wherein one half body is provided with an air inlet 101, and the other half body is provided with a plurality of air outlets 102, and the two half bodies are connected by a flange, and the formed storage bin 1 is assembled with a rail plate 2 and a rotating shaft 4. The present embodiment provides a storage bin 1 connected with two half bodies, which is convenient for disassembly and assembly of the rail plate 2, as well as for maintenance and replacement of internal structural parts of the storage bin 1, and is easy to operate.

[0023] In some embodiments, the main structure of the track disc 2 is a disc-shaped solid cylinder, and a single-sided or double-sided rotating shaft 4 is connected to the central position of the disc-shaped solid cylinder, and the rotating shaft 4 is connected to an external drive source; The track is arranged on a disc-shaped solid cylinder, and the through hole 3 arranged on the track is connected with the air inlet 101 and the plurality of air outlets 102 .

[0024] Specifically, in this embodiment, the rail plate 2 disposed in the storage bin 1 is connected to an external driving source via a rotating shaft 4, and the driving source is controlled to operate so as to drive the rotating shaft 4 to rotate, thereby driving the rail plate 2 to rotate.

[0025] It should be noted that the driving source described in this embodiment is a driving motor, and the rotating shaft 4 can be directly connected to the output shaft of the driving motor, or a transmission structure such as a coupling can be used to drive the rail plate 2 to rotate.

[0026] In addition, with the help of the structural design of the storage tank 1, the air source enters the storage tank 1 through the air inlet 101 and is output through different air outlets 102. Each air outlet 102 outputs a working fluid with a specified pressure spectrum characteristic. The working fluids of different air outlets 102 are merged as needed to realize the simulation of special unsteady flow characteristics.

[0027] In some embodiments, in response to the rails being divided into two groups, the two groups of rails are concentrically arranged; one group is arranged at the edge of the rail disc 2 , and the other group is arranged around the rotation axis 4 .

[0028] Specifically, in this embodiment, Figure 1As shown, taking two air outlets 102 and two groups of track belts as an example, the two groups of track belts are concentrically arranged, and two symmetrical fan-shaped through holes are arranged on a group of track belts located at the edge position, and one of the fan-shaped through holes corresponds to one of the air outlets 102, and a semicircular through hole is arranged on a group of track belts located in the middle position, and corresponds to the other air outlet 102. The rotation of the track plate 2 can generate pressure pulse waveforms with different frequencies and phases.

[0029] In addition, for the pressure pulse waveform with the same frequency but different phase, it can be realized by only setting a set of rail belts on the rail plate 2 and setting a number of through holes on the rail belts as required.

[0030] It should be noted that the present embodiment adopts methods including but not limited to adjusting the shape, position, and number of the outlet or through hole 3 to achieve the pressure amplitude output requirement, which can be flexibly adjusted according to actual conditions and will not be elaborated here.

[0031] In some embodiments, sealing areas are formed between two adjacent track belts, at the outer edge of the outermost track belt, and at the inner edge of the innermost track belt, and the inner wall surface of the sealing area cooperates with the inner wall surface of the storage bin 1 to form a labyrinth-type sealing structure.

[0032] Specifically, in this embodiment, sealing areas are formed between two adjacent track belts, the outer edge of the track belt of the outermost circle, and the inner edge of the track belt of the innermost circle. A labyrinth sealing structure is formed between the non-rotating surface where the outlet of the storage bin 1 is located, which is adjacent to the side of the track plate 2, and the inner wall surface where the sealing area is located. The two together set a labyrinth sealing structure 5 between adjacent track belts and between the track belt and the rotating shaft 4, forcing the gas to change direction when passing through the gap, increasing the flow resistance, and the gas in the cavity needs to pass through the narrow gap multiple times. Each throttling further reduces the gas flow rate, thereby reducing leakage; in addition, due to the multiple throttling effects of the labyrinth structure on the airflow, the noise generated by the gas flow can be reduced, thereby reducing the noise level of the engine.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

[0034] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A multi-track disc pressure pulse generator, characterized in that: The invention comprises a storage bin (1) having an air inlet (101) and a plurality of air outlets (102), and a track disc (2) provided with at least one set of annular track belts, wherein the track disc (2) is adjacent to the air outlet (102) side of the storage bin (1), and the track belt is provided with a through hole (3) penetrating the track disc (2), and the through hole (3) divides the track belt into a ventilation area and a gas blocking area; A multiple sealing structure is provided between the inner wall of the container (1) located on the air outlet (102) side and a side wall of the rail plate (2).

2. A multi-track disc type pressure pulse generator according to claim 1, characterized in that: The main structure of the storage bin (1) is a hollow cylinder, a plurality of air outlets (102) are distributed on a single non-rotating surface of the hollow cylinder, and the air inlet (101) is arranged on the other non-rotating surface or the rotating surface.

3. A multi-track disc type pressure pulse generator according to claim 2, characterized in that: The hollow cylinder is composed of two half bodies connected by a flange, and the two half bodies are assembled to form the storage bin (1).

4. A multi-track disc type pressure pulse generator according to claim 3, characterized in that: A sealing gasket is installed at the flange connection of the two half bodies.

5. The multi-track disc type pressure pulse generator according to claim 1, characterized in that: The main structure of the rail disc (2) is a disc-shaped solid cylinder, a single-sided or double-sided rotating shaft (4) is connected to the central position of the disc-shaped solid cylinder, and the rotating shaft (4) is connected to an external drive source; The track belt is arranged on the disc-shaped solid cylinder, and the through hole (3) provided on the track belt is connected to the air inlet (101) and the plurality of air outlets (102).

6. A multi-track disc type pressure pulse generator according to claim 5, characterized in that: In response to the fact that there are two groups of track belts, the two groups of track belts are concentrically arranged; wherein one group is located at the edge of the track plate (2), and the other group is arranged around the rotation axis (4).

7. The multi-track disc type pressure pulse generator according to claim 1, characterized in that: Sealing areas are formed between two adjacent track belts, at the outer edge of the track belt of the outermost circle, and at the inner edge of the track belt of the innermost circle. The inner wall surface of the sealing area cooperates with the inner wall surface of the container (1) to form a labyrinth-type sealing structure.

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